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-rw-r--r--Documentation/DocBook/media/v4l/.gitignore1
-rw-r--r--Documentation/DocBook/media/v4l/biblio.xml353
-rw-r--r--Documentation/DocBook/media/v4l/capture.c.xml659
-rw-r--r--Documentation/DocBook/media/v4l/common.xml1102
-rw-r--r--Documentation/DocBook/media/v4l/compat.xml2741
-rw-r--r--Documentation/DocBook/media/v4l/controls.xml5464
-rw-r--r--Documentation/DocBook/media/v4l/dev-capture.xml110
-rw-r--r--Documentation/DocBook/media/v4l/dev-codec.xml27
-rw-r--r--Documentation/DocBook/media/v4l/dev-effect.xml17
-rw-r--r--Documentation/DocBook/media/v4l/dev-event.xml43
-rw-r--r--Documentation/DocBook/media/v4l/dev-osd.xml149
-rw-r--r--Documentation/DocBook/media/v4l/dev-output.xml106
-rw-r--r--Documentation/DocBook/media/v4l/dev-overlay.xml368
-rw-r--r--Documentation/DocBook/media/v4l/dev-radio.xml49
-rw-r--r--Documentation/DocBook/media/v4l/dev-raw-vbi.xml345
-rw-r--r--Documentation/DocBook/media/v4l/dev-rds.xml196
-rw-r--r--Documentation/DocBook/media/v4l/dev-sdr.xml120
-rw-r--r--Documentation/DocBook/media/v4l/dev-sliced-vbi.xml706
-rw-r--r--Documentation/DocBook/media/v4l/dev-subdev.xml484
-rw-r--r--Documentation/DocBook/media/v4l/dev-teletext.xml29
-rw-r--r--Documentation/DocBook/media/v4l/driver.xml200
-rw-r--r--Documentation/DocBook/media/v4l/fdl-appendix.xml671
-rw-r--r--Documentation/DocBook/media/v4l/func-close.xml62
-rw-r--r--Documentation/DocBook/media/v4l/func-ioctl.xml71
-rw-r--r--Documentation/DocBook/media/v4l/func-mmap.xml183
-rw-r--r--Documentation/DocBook/media/v4l/func-munmap.xml76
-rw-r--r--Documentation/DocBook/media/v4l/func-open.xml113
-rw-r--r--Documentation/DocBook/media/v4l/func-poll.xml142
-rw-r--r--Documentation/DocBook/media/v4l/func-read.xml181
-rw-r--r--Documentation/DocBook/media/v4l/func-select.xml130
-rw-r--r--Documentation/DocBook/media/v4l/func-write.xml128
-rw-r--r--Documentation/DocBook/media/v4l/gen-errors.xml77
-rw-r--r--Documentation/DocBook/media/v4l/io.xml1533
-rw-r--r--Documentation/DocBook/media/v4l/keytable.c.xml172
-rw-r--r--Documentation/DocBook/media/v4l/libv4l.xml160
-rw-r--r--Documentation/DocBook/media/v4l/lirc_device_interface.xml255
-rw-r--r--Documentation/DocBook/media/v4l/media-controller.xml89
-rw-r--r--Documentation/DocBook/media/v4l/media-func-close.xml59
-rw-r--r--Documentation/DocBook/media/v4l/media-func-ioctl.xml73
-rw-r--r--Documentation/DocBook/media/v4l/media-func-open.xml94
-rw-r--r--Documentation/DocBook/media/v4l/media-ioc-device-info.xml132
-rw-r--r--Documentation/DocBook/media/v4l/media-ioc-enum-entities.xml280
-rw-r--r--Documentation/DocBook/media/v4l/media-ioc-enum-links.xml216
-rw-r--r--Documentation/DocBook/media/v4l/media-ioc-setup-link.xml84
-rw-r--r--Documentation/DocBook/media/v4l/pixfmt-grey.xml62
-rw-r--r--Documentation/DocBook/media/v4l/pixfmt-m420.xml139
-rw-r--r--Documentation/DocBook/media/v4l/pixfmt-nv12.xml143
-rw-r--r--Documentation/DocBook/media/v4l/pixfmt-nv12m.xml153
-rw-r--r--Documentation/DocBook/media/v4l/pixfmt-nv12mt.xml66
-rw-r--r--Documentation/DocBook/media/v4l/pixfmt-nv16.xml166
-rw-r--r--Documentation/DocBook/media/v4l/pixfmt-nv16m.xml170
-rw-r--r--Documentation/DocBook/media/v4l/pixfmt-nv24.xml121
-rw-r--r--Documentation/DocBook/media/v4l/pixfmt-packed-rgb.xml937
-rw-r--r--Documentation/DocBook/media/v4l/pixfmt-packed-yuv.xml236
-rw-r--r--Documentation/DocBook/media/v4l/pixfmt-sbggr16.xml83
-rw-r--r--Documentation/DocBook/media/v4l/pixfmt-sbggr8.xml67
-rw-r--r--Documentation/DocBook/media/v4l/pixfmt-sdr-cs08.xml44
-rw-r--r--Documentation/DocBook/media/v4l/pixfmt-sdr-cs14le.xml47
-rw-r--r--Documentation/DocBook/media/v4l/pixfmt-sdr-cu08.xml44
-rw-r--r--Documentation/DocBook/media/v4l/pixfmt-sdr-cu16le.xml46
-rw-r--r--Documentation/DocBook/media/v4l/pixfmt-sdr-ru12le.xml40
-rw-r--r--Documentation/DocBook/media/v4l/pixfmt-sgbrg8.xml67
-rw-r--r--Documentation/DocBook/media/v4l/pixfmt-sgrbg8.xml67
-rw-r--r--Documentation/DocBook/media/v4l/pixfmt-srggb10.xml90
-rw-r--r--Documentation/DocBook/media/v4l/pixfmt-srggb10alaw8.xml34
-rw-r--r--Documentation/DocBook/media/v4l/pixfmt-srggb10dpcm8.xml28
-rw-r--r--Documentation/DocBook/media/v4l/pixfmt-srggb10p.xml99
-rw-r--r--Documentation/DocBook/media/v4l/pixfmt-srggb12.xml90
-rw-r--r--Documentation/DocBook/media/v4l/pixfmt-srggb8.xml67
-rw-r--r--Documentation/DocBook/media/v4l/pixfmt-uv8.xml62
-rw-r--r--Documentation/DocBook/media/v4l/pixfmt-uyvy.xml120
-rw-r--r--Documentation/DocBook/media/v4l/pixfmt-vyuy.xml120
-rw-r--r--Documentation/DocBook/media/v4l/pixfmt-y10.xml79
-rw-r--r--Documentation/DocBook/media/v4l/pixfmt-y10b.xml43
-rw-r--r--Documentation/DocBook/media/v4l/pixfmt-y12.xml79
-rw-r--r--Documentation/DocBook/media/v4l/pixfmt-y16.xml81
-rw-r--r--Documentation/DocBook/media/v4l/pixfmt-y41p.xml149
-rw-r--r--Documentation/DocBook/media/v4l/pixfmt-yuv410.xml133
-rw-r--r--Documentation/DocBook/media/v4l/pixfmt-yuv411p.xml147
-rw-r--r--Documentation/DocBook/media/v4l/pixfmt-yuv420.xml149
-rw-r--r--Documentation/DocBook/media/v4l/pixfmt-yuv420m.xml154
-rw-r--r--Documentation/DocBook/media/v4l/pixfmt-yuv422p.xml153
-rw-r--r--Documentation/DocBook/media/v4l/pixfmt-yuyv.xml120
-rw-r--r--Documentation/DocBook/media/v4l/pixfmt-yvu420m.xml154
-rw-r--r--Documentation/DocBook/media/v4l/pixfmt-yvyu.xml120
-rw-r--r--Documentation/DocBook/media/v4l/pixfmt.xml1801
-rw-r--r--Documentation/DocBook/media/v4l/planar-apis.xml62
-rw-r--r--Documentation/DocBook/media/v4l/remote_controllers.xml320
-rw-r--r--Documentation/DocBook/media/v4l/selection-api.xml324
-rw-r--r--Documentation/DocBook/media/v4l/selections-common.xml180
-rw-r--r--Documentation/DocBook/media/v4l/subdev-formats.xml4038
-rw-r--r--Documentation/DocBook/media/v4l/subdev-image-processing-crop.dia614
-rw-r--r--Documentation/DocBook/media/v4l/subdev-image-processing-full.dia1588
-rw-r--r--Documentation/DocBook/media/v4l/subdev-image-processing-scaling-multi-source.dia1152
-rw-r--r--Documentation/DocBook/media/v4l/v4l2.xml709
-rw-r--r--Documentation/DocBook/media/v4l/v4l2grab.c.xml164
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-create-bufs.xml165
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-cropcap.xml166
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-dbg-g-chip-info.xml207
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-dbg-g-register.xml227
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-decoder-cmd.xml249
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-dqevent.xml468
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-dv-timings-cap.xml214
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-encoder-cmd.xml189
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-enum-dv-timings.xml133
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-enum-fmt.xml159
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-enum-frameintervals.xml259
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-enum-framesizes.xml264
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-enum-freq-bands.xml181
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-enumaudio.xml76
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-enumaudioout.xml79
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-enuminput.xml316
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-enumoutput.xml201
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-enumstd.xml389
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-expbuf.xml210
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-g-audio.xml172
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-g-audioout.xml138
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-g-crop.xml129
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-g-ctrl.xml133
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-g-dv-timings.xml341
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-g-edid.xml162
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-g-enc-index.xml189
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-g-ext-ctrls.xml427
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-g-fbuf.xml459
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-g-fmt.xml204
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-g-frequency.xml148
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-g-input.xml83
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-g-jpegcomp.xml175
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-g-modulator.xml240
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-g-output.xml85
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-g-parm.xml314
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-g-priority.xml135
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-g-selection.xml239
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-g-sliced-vbi-cap.xml255
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-g-std.xml98
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-g-tuner.xml578
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-log-status.xml41
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-overlay.xml74
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-prepare-buf.xml94
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-qbuf.xml192
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-query-dv-timings.xml110
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-querybuf.xml105
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-querycap.xml344
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-queryctrl.xml650
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-querystd.xml75
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-reqbufs.xml137
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-s-hw-freq-seek.xml188
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-streamon.xml128
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-subdev-enum-frame-interval.xml157
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-subdev-enum-frame-size.xml159
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-subdev-enum-mbus-code.xml124
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-subdev-g-crop.xml158
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-subdev-g-fmt.xml183
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-subdev-g-frame-interval.xml141
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-subdev-g-selection.xml165
-rw-r--r--Documentation/DocBook/media/v4l/vidioc-subscribe-event.xml129
156 files changed, 46381 insertions, 0 deletions
diff --git a/Documentation/DocBook/media/v4l/.gitignore b/Documentation/DocBook/media/v4l/.gitignore
new file mode 100644
index 000000000..d7ec32eaf
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/.gitignore
@@ -0,0 +1 @@
+!*.xml
diff --git a/Documentation/DocBook/media/v4l/biblio.xml b/Documentation/DocBook/media/v4l/biblio.xml
new file mode 100644
index 000000000..fdee6b3f3
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/biblio.xml
@@ -0,0 +1,353 @@
+ <bibliography>
+ <title>References</title>
+
+ <biblioentry id="cea608">
+ <abbrev>CEA&nbsp;608-E</abbrev>
+ <authorgroup>
+ <corpauthor>Consumer Electronics Association (<ulink
+url="http://www.ce.org">http://www.ce.org</ulink>)</corpauthor>
+ </authorgroup>
+ <title>CEA-608-E R-2014 "Line 21 Data Services"</title>
+ </biblioentry>
+
+ <biblioentry id="en300294">
+ <abbrev>EN&nbsp;300&nbsp;294</abbrev>
+ <authorgroup>
+ <corpauthor>European Telecommunication Standards Institute
+(<ulink url="http://www.etsi.org">http://www.etsi.org</ulink>)</corpauthor>
+ </authorgroup>
+ <title>EN 300 294 "625-line television Wide Screen Signalling
+(WSS)"</title>
+ </biblioentry>
+
+ <biblioentry id="ets300231">
+ <abbrev>ETS&nbsp;300&nbsp;231</abbrev>
+ <authorgroup>
+ <corpauthor>European Telecommunication Standards Institute
+(<ulink
+url="http://www.etsi.org">http://www.etsi.org</ulink>)</corpauthor>
+ </authorgroup>
+ <title>ETS 300 231 "Specification of the domestic video
+Programme Delivery Control system (PDC)"</title>
+ </biblioentry>
+
+ <biblioentry id="ets300706">
+ <abbrev>ETS&nbsp;300&nbsp;706</abbrev>
+ <authorgroup>
+ <corpauthor>European Telecommunication Standards Institute
+(<ulink url="http://www.etsi.org">http://www.etsi.org</ulink>)</corpauthor>
+ </authorgroup>
+ <title>ETS 300 706 "Enhanced Teletext specification"</title>
+ </biblioentry>
+
+ <biblioentry id="mpeg2part1">
+ <abbrev>ISO&nbsp;13818-1</abbrev>
+ <authorgroup>
+ <corpauthor>International Telecommunication Union (<ulink
+url="http://www.itu.ch">http://www.itu.ch</ulink>), International
+Organisation for Standardisation (<ulink
+url="http://www.iso.ch">http://www.iso.ch</ulink>)</corpauthor>
+ </authorgroup>
+ <title>ITU-T Rec. H.222.0 | ISO/IEC 13818-1 "Information
+technology &mdash; Generic coding of moving pictures and associated
+audio information: Systems"</title>
+ </biblioentry>
+
+ <biblioentry id="mpeg2part2">
+ <abbrev>ISO&nbsp;13818-2</abbrev>
+ <authorgroup>
+ <corpauthor>International Telecommunication Union (<ulink
+url="http://www.itu.ch">http://www.itu.ch</ulink>), International
+Organisation for Standardisation (<ulink
+url="http://www.iso.ch">http://www.iso.ch</ulink>)</corpauthor>
+ </authorgroup>
+ <title>ITU-T Rec. H.262 | ISO/IEC 13818-2 "Information
+technology &mdash; Generic coding of moving pictures and associated
+audio information: Video"</title>
+ </biblioentry>
+
+ <biblioentry id="itu470">
+ <abbrev>ITU&nbsp;BT.470</abbrev>
+ <authorgroup>
+ <corpauthor>International Telecommunication Union (<ulink
+url="http://www.itu.ch">http://www.itu.ch</ulink>)</corpauthor>
+ </authorgroup>
+ <title>ITU-R Recommendation BT.470-6 "Conventional Television
+Systems"</title>
+ </biblioentry>
+
+ <biblioentry id="itu601">
+ <abbrev>ITU&nbsp;BT.601</abbrev>
+ <authorgroup>
+ <corpauthor>International Telecommunication Union (<ulink
+url="http://www.itu.ch">http://www.itu.ch</ulink>)</corpauthor>
+ </authorgroup>
+ <title>ITU-R Recommendation BT.601-5 "Studio Encoding Parameters
+of Digital Television for Standard 4:3 and Wide-Screen 16:9 Aspect
+Ratios"</title>
+ </biblioentry>
+
+ <biblioentry id="itu653">
+ <abbrev>ITU&nbsp;BT.653</abbrev>
+ <authorgroup>
+ <corpauthor>International Telecommunication Union (<ulink
+url="http://www.itu.ch">http://www.itu.ch</ulink>)</corpauthor>
+ </authorgroup>
+ <title>ITU-R Recommendation BT.653-3 "Teletext systems"</title>
+ </biblioentry>
+
+ <biblioentry id="itu709">
+ <abbrev>ITU&nbsp;BT.709</abbrev>
+ <authorgroup>
+ <corpauthor>International Telecommunication Union (<ulink
+url="http://www.itu.ch">http://www.itu.ch</ulink>)</corpauthor>
+ </authorgroup>
+ <title>ITU-R Recommendation BT.709-5 "Parameter values for the
+HDTV standards for production and international programme
+exchange"</title>
+ </biblioentry>
+
+ <biblioentry id="itu1119">
+ <abbrev>ITU&nbsp;BT.1119</abbrev>
+ <authorgroup>
+ <corpauthor>International Telecommunication Union (<ulink
+url="http://www.itu.ch">http://www.itu.ch</ulink>)</corpauthor>
+ </authorgroup>
+ <title>ITU-R Recommendation BT.1119 "625-line
+television Wide Screen Signalling (WSS)"</title>
+ </biblioentry>
+
+ <biblioentry id="jfif">
+ <abbrev>JFIF</abbrev>
+ <authorgroup>
+ <corpauthor>Independent JPEG Group (<ulink
+url="http://www.ijg.org">http://www.ijg.org</ulink>)</corpauthor>
+ </authorgroup>
+ <title>JPEG File Interchange Format</title>
+ <subtitle>Version 1.02</subtitle>
+ </biblioentry>
+
+ <biblioentry id="itu-t81">
+ <abbrev>ITU-T.81</abbrev>
+ <authorgroup>
+ <corpauthor>International Telecommunication Union
+(<ulink url="http://www.itu.int">http://www.itu.int</ulink>)</corpauthor>
+ </authorgroup>
+ <title>ITU-T Recommendation T.81
+"Information Technology &mdash; Digital Compression and Coding of Continous-Tone
+Still Images &mdash; Requirements and Guidelines"</title>
+ </biblioentry>
+
+ <biblioentry id="w3c-jpeg-jfif">
+ <abbrev>W3C JPEG JFIF</abbrev>
+ <authorgroup>
+ <corpauthor>The World Wide Web Consortium (<ulink
+url="http://www.w3.org/Graphics/JPEG">http://www.w3.org</ulink>)</corpauthor>
+ </authorgroup>
+ <title>JPEG JFIF</title>
+ </biblioentry>
+
+ <biblioentry id="smpte12m">
+ <abbrev>SMPTE&nbsp;12M</abbrev>
+ <authorgroup>
+ <corpauthor>Society of Motion Picture and Television Engineers
+(<ulink url="http://www.smpte.org">http://www.smpte.org</ulink>)</corpauthor>
+ </authorgroup>
+ <title>SMPTE 12M-1999 "Television, Audio and Film - Time and
+Control Code"</title>
+ </biblioentry>
+
+ <biblioentry id="smpte170m">
+ <abbrev>SMPTE&nbsp;170M</abbrev>
+ <authorgroup>
+ <corpauthor>Society of Motion Picture and Television Engineers
+(<ulink url="http://www.smpte.org">http://www.smpte.org</ulink>)</corpauthor>
+ </authorgroup>
+ <title>SMPTE 170M-1999 "Television - Composite Analog Video
+Signal - NTSC for Studio Applications"</title>
+ </biblioentry>
+
+ <biblioentry id="smpte240m">
+ <abbrev>SMPTE&nbsp;240M</abbrev>
+ <authorgroup>
+ <corpauthor>Society of Motion Picture and Television Engineers
+(<ulink url="http://www.smpte.org">http://www.smpte.org</ulink>)</corpauthor>
+ </authorgroup>
+ <title>SMPTE 240M-1999 "Television - Signal Parameters -
+1125-Line High-Definition Production"</title>
+ </biblioentry>
+
+ <biblioentry id="srgb">
+ <abbrev>sRGB</abbrev>
+ <authorgroup>
+ <corpauthor>International Electrotechnical Commission
+(<ulink url="http://www.iec.ch">http://www.iec.ch</ulink>)</corpauthor>
+ </authorgroup>
+ <title>IEC 61966-2-1 ed1.0 "Multimedia systems and equipment - Colour measurement
+and management - Part 2-1: Colour management - Default RGB colour space - sRGB"</title>
+ </biblioentry>
+
+ <biblioentry id="sycc">
+ <abbrev>sYCC</abbrev>
+ <authorgroup>
+ <corpauthor>International Electrotechnical Commission
+(<ulink url="http://www.iec.ch">http://www.iec.ch</ulink>)</corpauthor>
+ </authorgroup>
+ <title>IEC 61966-2-1-am1 ed1.0 "Amendment 1 - Multimedia systems and equipment - Colour measurement
+and management - Part 2-1: Colour management - Default RGB colour space - sRGB"</title>
+ </biblioentry>
+
+ <biblioentry id="xvycc">
+ <abbrev>xvYCC</abbrev>
+ <authorgroup>
+ <corpauthor>International Electrotechnical Commission
+(<ulink url="http://www.iec.ch">http://www.iec.ch</ulink>)</corpauthor>
+ </authorgroup>
+ <title>IEC 61966-2-4 ed1.0 "Multimedia systems and equipment - Colour measurement
+and management - Part 2-4: Colour management - Extended-gamut YCC colour space for video
+applications - xvYCC"</title>
+ </biblioentry>
+
+ <biblioentry id="adobergb">
+ <abbrev>AdobeRGB</abbrev>
+ <authorgroup>
+ <corpauthor>Adobe Systems Incorporated (<ulink url="http://www.adobe.com">http://www.adobe.com</ulink>)</corpauthor>
+ </authorgroup>
+ <title>Adobe&copy; RGB (1998) Color Image Encoding Version 2005-05</title>
+ </biblioentry>
+
+ <biblioentry id="oprgb">
+ <abbrev>opRGB</abbrev>
+ <authorgroup>
+ <corpauthor>International Electrotechnical Commission
+(<ulink url="http://www.iec.ch">http://www.iec.ch</ulink>)</corpauthor>
+ </authorgroup>
+ <title>IEC 61966-2-5 "Multimedia systems and equipment - Colour measurement
+and management - Part 2-5: Colour management - Optional RGB colour space - opRGB"</title>
+ </biblioentry>
+
+ <biblioentry id="itu2020">
+ <abbrev>ITU&nbsp;BT.2020</abbrev>
+ <authorgroup>
+ <corpauthor>International Telecommunication Union (<ulink
+url="http://www.itu.ch">http://www.itu.ch</ulink>)</corpauthor>
+ </authorgroup>
+ <title>ITU-R Recommendation BT.2020 (08/2012) "Parameter values for ultra-high
+definition television systems for production and international programme exchange"
+</title>
+ </biblioentry>
+
+ <biblioentry id="tech3213">
+ <abbrev>EBU&nbsp;Tech&nbsp;3213</abbrev>
+ <authorgroup>
+ <corpauthor>European Broadcast Union (<ulink
+url="http://www.ebu.ch">http://www.ebu.ch</ulink>)</corpauthor>
+ </authorgroup>
+ <title>E.B.U. Standard for Chromaticity Tolerances for Studio Monitors"</title>
+ </biblioentry>
+
+ <biblioentry id="iec62106">
+ <abbrev>IEC&nbsp;62106</abbrev>
+ <authorgroup>
+ <corpauthor>International Electrotechnical Commission
+(<ulink url="http://www.iec.ch">http://www.iec.ch</ulink>)</corpauthor>
+ </authorgroup>
+ <title>Specification of the radio data system (RDS) for VHF/FM sound broadcasting
+in the frequency range from 87,5 to 108,0 MHz</title>
+ </biblioentry>
+
+ <biblioentry id="nrsc4">
+ <abbrev>NRSC-4-B</abbrev>
+ <authorgroup>
+ <corpauthor>National Radio Systems Committee
+(<ulink url="http://www.nrscstandards.org">http://www.nrscstandards.org</ulink>)</corpauthor>
+ </authorgroup>
+ <title>NRSC-4-B: United States RBDS Standard</title>
+ </biblioentry>
+
+ <biblioentry id="iso12232">
+ <abbrev>ISO&nbsp;12232:2006</abbrev>
+ <authorgroup>
+ <corpauthor>International Organization for Standardization
+(<ulink url="http://www.iso.org">http://www.iso.org</ulink>)</corpauthor>
+ </authorgroup>
+ <title>Photography &mdash; Digital still cameras &mdash; Determination
+ of exposure index, ISO speed ratings, standard output sensitivity, and
+ recommended exposure index</title>
+ </biblioentry>
+
+ <biblioentry id="cea861">
+ <abbrev>CEA-861-E</abbrev>
+ <authorgroup>
+ <corpauthor>Consumer Electronics Association
+(<ulink url="http://www.ce.org">http://www.ce.org</ulink>)</corpauthor>
+ </authorgroup>
+ <title>A DTV Profile for Uncompressed High Speed Digital Interfaces</title>
+ </biblioentry>
+
+ <biblioentry id="vesadmt">
+ <abbrev>VESA&nbsp;DMT</abbrev>
+ <authorgroup>
+ <corpauthor>Video Electronics Standards Association
+(<ulink url="http://www.vesa.org">http://www.vesa.org</ulink>)</corpauthor>
+ </authorgroup>
+ <title>VESA and Industry Standards and Guidelines for Computer Display Monitor Timing (DMT)</title>
+ </biblioentry>
+
+ <biblioentry id="vesaedid">
+ <abbrev>EDID</abbrev>
+ <authorgroup>
+ <corpauthor>Video Electronics Standards Association
+(<ulink url="http://www.vesa.org">http://www.vesa.org</ulink>)</corpauthor>
+ </authorgroup>
+ <title>VESA Enhanced Extended Display Identification Data Standard</title>
+ <subtitle>Release A, Revision 2</subtitle>
+ </biblioentry>
+
+ <biblioentry id="hdcp">
+ <abbrev>HDCP</abbrev>
+ <authorgroup>
+ <corpauthor>Digital Content Protection LLC
+(<ulink url="http://www.digital-cp.com">http://www.digital-cp.com</ulink>)</corpauthor>
+ </authorgroup>
+ <title>High-bandwidth Digital Content Protection System</title>
+ <subtitle>Revision 1.3</subtitle>
+ </biblioentry>
+
+ <biblioentry id="hdmi">
+ <abbrev>HDMI</abbrev>
+ <authorgroup>
+ <corpauthor>HDMI Licensing LLC
+(<ulink url="http://www.hdmi.org">http://www.hdmi.org</ulink>)</corpauthor>
+ </authorgroup>
+ <title>High-Definition Multimedia Interface</title>
+ <subtitle>Specification Version 1.4a</subtitle>
+ </biblioentry>
+
+ <biblioentry id="dp">
+ <abbrev>DP</abbrev>
+ <authorgroup>
+ <corpauthor>Video Electronics Standards Association
+(<ulink url="http://www.vesa.org">http://www.vesa.org</ulink>)</corpauthor>
+ </authorgroup>
+ <title>VESA DisplayPort Standard</title>
+ <subtitle>Version 1, Revision 2</subtitle>
+ </biblioentry>
+
+ <biblioentry id="poynton">
+ <abbrev>poynton</abbrev>
+ <authorgroup>
+ <corpauthor>Charles Poynton</corpauthor>
+ </authorgroup>
+ <title>Digital Video and HDTV, Algorithms and Interfaces</title>
+ </biblioentry>
+
+ <biblioentry id="colimg">
+ <abbrev>colimg</abbrev>
+ <authorgroup>
+ <corpauthor>Erik Reinhard et al.</corpauthor>
+ </authorgroup>
+ <title>Color Imaging: Fundamentals and Applications</title>
+ </biblioentry>
+
+ </bibliography>
diff --git a/Documentation/DocBook/media/v4l/capture.c.xml b/Documentation/DocBook/media/v4l/capture.c.xml
new file mode 100644
index 000000000..1c5c49a2d
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/capture.c.xml
@@ -0,0 +1,659 @@
+<programlisting>
+/*
+ * V4L2 video capture example
+ *
+ * This program can be used and distributed without restrictions.
+ *
+ * This program is provided with the V4L2 API
+ * see http://linuxtv.org/docs.php for more information
+ */
+
+#include &lt;stdio.h&gt;
+#include &lt;stdlib.h&gt;
+#include &lt;string.h&gt;
+#include &lt;assert.h&gt;
+
+#include &lt;getopt.h&gt; /* getopt_long() */
+
+#include &lt;fcntl.h&gt; /* low-level i/o */
+#include &lt;unistd.h&gt;
+#include &lt;errno.h&gt;
+#include &lt;sys/stat.h&gt;
+#include &lt;sys/types.h&gt;
+#include &lt;sys/time.h&gt;
+#include &lt;sys/mman.h&gt;
+#include &lt;sys/ioctl.h&gt;
+
+#include &lt;linux/videodev2.h&gt;
+
+#define CLEAR(x) memset(&amp;(x), 0, sizeof(x))
+
+enum io_method {
+ IO_METHOD_READ,
+ IO_METHOD_MMAP,
+ IO_METHOD_USERPTR,
+};
+
+struct buffer {
+ void *start;
+ size_t length;
+};
+
+static char *dev_name;
+static enum io_method io = IO_METHOD_MMAP;
+static int fd = -1;
+struct buffer *buffers;
+static unsigned int n_buffers;
+static int out_buf;
+static int force_format;
+static int frame_count = 70;
+
+static void errno_exit(const char *s)
+{
+ fprintf(stderr, "%s error %d, %s\n", s, errno, strerror(errno));
+ exit(EXIT_FAILURE);
+}
+
+static int xioctl(int fh, int request, void *arg)
+{
+ int r;
+
+ do {
+ r = ioctl(fh, request, arg);
+ } while (-1 == r &amp;&amp; EINTR == errno);
+
+ return r;
+}
+
+static void process_image(const void *p, int size)
+{
+ if (out_buf)
+ fwrite(p, size, 1, stdout);
+
+ fflush(stderr);
+ fprintf(stderr, ".");
+ fflush(stdout);
+}
+
+static int read_frame(void)
+{
+ struct <link linkend="v4l2-buffer">v4l2_buffer</link> buf;
+ unsigned int i;
+
+ switch (io) {
+ case IO_METHOD_READ:
+ if (-1 == read(fd, buffers[0].start, buffers[0].length)) {
+ switch (errno) {
+ case EAGAIN:
+ return 0;
+
+ case EIO:
+ /* Could ignore EIO, see spec. */
+
+ /* fall through */
+
+ default:
+ errno_exit("read");
+ }
+ }
+
+ process_image(buffers[0].start, buffers[0].length);
+ break;
+
+ case IO_METHOD_MMAP:
+ CLEAR(buf);
+
+ buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ buf.memory = V4L2_MEMORY_MMAP;
+
+ if (-1 == xioctl(fd, VIDIOC_DQBUF, &amp;buf)) {
+ switch (errno) {
+ case EAGAIN:
+ return 0;
+
+ case EIO:
+ /* Could ignore EIO, see spec. */
+
+ /* fall through */
+
+ default:
+ errno_exit("VIDIOC_DQBUF");
+ }
+ }
+
+ assert(buf.index &lt; n_buffers);
+
+ process_image(buffers[buf.index].start, buf.bytesused);
+
+ if (-1 == xioctl(fd, VIDIOC_QBUF, &amp;buf))
+ errno_exit("VIDIOC_QBUF");
+ break;
+
+ case IO_METHOD_USERPTR:
+ CLEAR(buf);
+
+ buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ buf.memory = V4L2_MEMORY_USERPTR;
+
+ if (-1 == xioctl(fd, VIDIOC_DQBUF, &amp;buf)) {
+ switch (errno) {
+ case EAGAIN:
+ return 0;
+
+ case EIO:
+ /* Could ignore EIO, see spec. */
+
+ /* fall through */
+
+ default:
+ errno_exit("VIDIOC_DQBUF");
+ }
+ }
+
+ for (i = 0; i &lt; n_buffers; ++i)
+ if (buf.m.userptr == (unsigned long)buffers[i].start
+ &amp;&amp; buf.length == buffers[i].length)
+ break;
+
+ assert(i &lt; n_buffers);
+
+ process_image((void *)buf.m.userptr, buf.bytesused);
+
+ if (-1 == xioctl(fd, VIDIOC_QBUF, &amp;buf))
+ errno_exit("VIDIOC_QBUF");
+ break;
+ }
+
+ return 1;
+}
+
+static void mainloop(void)
+{
+ unsigned int count;
+
+ count = frame_count;
+
+ while (count-- &gt; 0) {
+ for (;;) {
+ fd_set fds;
+ struct timeval tv;
+ int r;
+
+ FD_ZERO(&amp;fds);
+ FD_SET(fd, &amp;fds);
+
+ /* Timeout. */
+ tv.tv_sec = 2;
+ tv.tv_usec = 0;
+
+ r = select(fd + 1, &amp;fds, NULL, NULL, &amp;tv);
+
+ if (-1 == r) {
+ if (EINTR == errno)
+ continue;
+ errno_exit("select");
+ }
+
+ if (0 == r) {
+ fprintf(stderr, "select timeout\n");
+ exit(EXIT_FAILURE);
+ }
+
+ if (read_frame())
+ break;
+ /* EAGAIN - continue select loop. */
+ }
+ }
+}
+
+static void stop_capturing(void)
+{
+ enum <link linkend="v4l2-buf-type">v4l2_buf_type</link> type;
+
+ switch (io) {
+ case IO_METHOD_READ:
+ /* Nothing to do. */
+ break;
+
+ case IO_METHOD_MMAP:
+ case IO_METHOD_USERPTR:
+ type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ if (-1 == xioctl(fd, VIDIOC_STREAMOFF, &amp;type))
+ errno_exit("VIDIOC_STREAMOFF");
+ break;
+ }
+}
+
+static void start_capturing(void)
+{
+ unsigned int i;
+ enum <link linkend="v4l2-buf-type">v4l2_buf_type</link> type;
+
+ switch (io) {
+ case IO_METHOD_READ:
+ /* Nothing to do. */
+ break;
+
+ case IO_METHOD_MMAP:
+ for (i = 0; i &lt; n_buffers; ++i) {
+ struct <link linkend="v4l2-buffer">v4l2_buffer</link> buf;
+
+ CLEAR(buf);
+ buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ buf.memory = V4L2_MEMORY_MMAP;
+ buf.index = i;
+
+ if (-1 == xioctl(fd, VIDIOC_QBUF, &amp;buf))
+ errno_exit("VIDIOC_QBUF");
+ }
+ type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ if (-1 == xioctl(fd, VIDIOC_STREAMON, &amp;type))
+ errno_exit("VIDIOC_STREAMON");
+ break;
+
+ case IO_METHOD_USERPTR:
+ for (i = 0; i &lt; n_buffers; ++i) {
+ struct <link linkend="v4l2-buffer">v4l2_buffer</link> buf;
+
+ CLEAR(buf);
+ buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ buf.memory = V4L2_MEMORY_USERPTR;
+ buf.index = i;
+ buf.m.userptr = (unsigned long)buffers[i].start;
+ buf.length = buffers[i].length;
+
+ if (-1 == xioctl(fd, VIDIOC_QBUF, &amp;buf))
+ errno_exit("VIDIOC_QBUF");
+ }
+ type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ if (-1 == xioctl(fd, VIDIOC_STREAMON, &amp;type))
+ errno_exit("VIDIOC_STREAMON");
+ break;
+ }
+}
+
+static void uninit_device(void)
+{
+ unsigned int i;
+
+ switch (io) {
+ case IO_METHOD_READ:
+ free(buffers[0].start);
+ break;
+
+ case IO_METHOD_MMAP:
+ for (i = 0; i &lt; n_buffers; ++i)
+ if (-1 == munmap(buffers[i].start, buffers[i].length))
+ errno_exit("munmap");
+ break;
+
+ case IO_METHOD_USERPTR:
+ for (i = 0; i &lt; n_buffers; ++i)
+ free(buffers[i].start);
+ break;
+ }
+
+ free(buffers);
+}
+
+static void init_read(unsigned int buffer_size)
+{
+ buffers = calloc(1, sizeof(*buffers));
+
+ if (!buffers) {
+ fprintf(stderr, "Out of memory\n");
+ exit(EXIT_FAILURE);
+ }
+
+ buffers[0].length = buffer_size;
+ buffers[0].start = malloc(buffer_size);
+
+ if (!buffers[0].start) {
+ fprintf(stderr, "Out of memory\n");
+ exit(EXIT_FAILURE);
+ }
+}
+
+static void init_mmap(void)
+{
+ struct <link linkend="v4l2-requestbuffers">v4l2_requestbuffers</link> req;
+
+ CLEAR(req);
+
+ req.count = 4;
+ req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ req.memory = V4L2_MEMORY_MMAP;
+
+ if (-1 == xioctl(fd, VIDIOC_REQBUFS, &amp;req)) {
+ if (EINVAL == errno) {
+ fprintf(stderr, "%s does not support "
+ "memory mapping\n", dev_name);
+ exit(EXIT_FAILURE);
+ } else {
+ errno_exit("VIDIOC_REQBUFS");
+ }
+ }
+
+ if (req.count &lt; 2) {
+ fprintf(stderr, "Insufficient buffer memory on %s\n",
+ dev_name);
+ exit(EXIT_FAILURE);
+ }
+
+ buffers = calloc(req.count, sizeof(*buffers));
+
+ if (!buffers) {
+ fprintf(stderr, "Out of memory\n");
+ exit(EXIT_FAILURE);
+ }
+
+ for (n_buffers = 0; n_buffers &lt; req.count; ++n_buffers) {
+ struct <link linkend="v4l2-buffer">v4l2_buffer</link> buf;
+
+ CLEAR(buf);
+
+ buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ buf.memory = V4L2_MEMORY_MMAP;
+ buf.index = n_buffers;
+
+ if (-1 == xioctl(fd, VIDIOC_QUERYBUF, &amp;buf))
+ errno_exit("VIDIOC_QUERYBUF");
+
+ buffers[n_buffers].length = buf.length;
+ buffers[n_buffers].start =
+ mmap(NULL /* start anywhere */,
+ buf.length,
+ PROT_READ | PROT_WRITE /* required */,
+ MAP_SHARED /* recommended */,
+ fd, buf.m.offset);
+
+ if (MAP_FAILED == buffers[n_buffers].start)
+ errno_exit("mmap");
+ }
+}
+
+static void init_userp(unsigned int buffer_size)
+{
+ struct <link linkend="v4l2-requestbuffers">v4l2_requestbuffers</link> req;
+
+ CLEAR(req);
+
+ req.count = 4;
+ req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ req.memory = V4L2_MEMORY_USERPTR;
+
+ if (-1 == xioctl(fd, VIDIOC_REQBUFS, &amp;req)) {
+ if (EINVAL == errno) {
+ fprintf(stderr, "%s does not support "
+ "user pointer i/o\n", dev_name);
+ exit(EXIT_FAILURE);
+ } else {
+ errno_exit("VIDIOC_REQBUFS");
+ }
+ }
+
+ buffers = calloc(4, sizeof(*buffers));
+
+ if (!buffers) {
+ fprintf(stderr, "Out of memory\n");
+ exit(EXIT_FAILURE);
+ }
+
+ for (n_buffers = 0; n_buffers &lt; 4; ++n_buffers) {
+ buffers[n_buffers].length = buffer_size;
+ buffers[n_buffers].start = malloc(buffer_size);
+
+ if (!buffers[n_buffers].start) {
+ fprintf(stderr, "Out of memory\n");
+ exit(EXIT_FAILURE);
+ }
+ }
+}
+
+static void init_device(void)
+{
+ struct <link linkend="v4l2-capability">v4l2_capability</link> cap;
+ struct <link linkend="v4l2-cropcap">v4l2_cropcap</link> cropcap;
+ struct <link linkend="v4l2-crop">v4l2_crop</link> crop;
+ struct <link linkend="v4l2-format">v4l2_format</link> fmt;
+ unsigned int min;
+
+ if (-1 == xioctl(fd, VIDIOC_QUERYCAP, &amp;cap)) {
+ if (EINVAL == errno) {
+ fprintf(stderr, "%s is no V4L2 device\n",
+ dev_name);
+ exit(EXIT_FAILURE);
+ } else {
+ errno_exit("VIDIOC_QUERYCAP");
+ }
+ }
+
+ if (!(cap.capabilities &amp; V4L2_CAP_VIDEO_CAPTURE)) {
+ fprintf(stderr, "%s is no video capture device\n",
+ dev_name);
+ exit(EXIT_FAILURE);
+ }
+
+ switch (io) {
+ case IO_METHOD_READ:
+ if (!(cap.capabilities &amp; V4L2_CAP_READWRITE)) {
+ fprintf(stderr, "%s does not support read i/o\n",
+ dev_name);
+ exit(EXIT_FAILURE);
+ }
+ break;
+
+ case IO_METHOD_MMAP:
+ case IO_METHOD_USERPTR:
+ if (!(cap.capabilities &amp; V4L2_CAP_STREAMING)) {
+ fprintf(stderr, "%s does not support streaming i/o\n",
+ dev_name);
+ exit(EXIT_FAILURE);
+ }
+ break;
+ }
+
+
+ /* Select video input, video standard and tune here. */
+
+
+ CLEAR(cropcap);
+
+ cropcap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+
+ if (0 == xioctl(fd, VIDIOC_CROPCAP, &amp;cropcap)) {
+ crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ crop.c = cropcap.defrect; /* reset to default */
+
+ if (-1 == xioctl(fd, VIDIOC_S_CROP, &amp;crop)) {
+ switch (errno) {
+ case EINVAL:
+ /* Cropping not supported. */
+ break;
+ default:
+ /* Errors ignored. */
+ break;
+ }
+ }
+ } else {
+ /* Errors ignored. */
+ }
+
+
+ CLEAR(fmt);
+
+ fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ if (force_format) {
+ fmt.fmt.pix.width = 640;
+ fmt.fmt.pix.height = 480;
+ fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
+ fmt.fmt.pix.field = V4L2_FIELD_INTERLACED;
+
+ if (-1 == xioctl(fd, VIDIOC_S_FMT, &amp;fmt))
+ errno_exit("VIDIOC_S_FMT");
+
+ /* Note VIDIOC_S_FMT may change width and height. */
+ } else {
+ /* Preserve original settings as set by v4l2-ctl for example */
+ if (-1 == xioctl(fd, VIDIOC_G_FMT, &amp;fmt))
+ errno_exit("VIDIOC_G_FMT");
+ }
+
+ /* Buggy driver paranoia. */
+ min = fmt.fmt.pix.width * 2;
+ if (fmt.fmt.pix.bytesperline &lt; min)
+ fmt.fmt.pix.bytesperline = min;
+ min = fmt.fmt.pix.bytesperline * fmt.fmt.pix.height;
+ if (fmt.fmt.pix.sizeimage &lt; min)
+ fmt.fmt.pix.sizeimage = min;
+
+ switch (io) {
+ case IO_METHOD_READ:
+ init_read(fmt.fmt.pix.sizeimage);
+ break;
+
+ case IO_METHOD_MMAP:
+ init_mmap();
+ break;
+
+ case IO_METHOD_USERPTR:
+ init_userp(fmt.fmt.pix.sizeimage);
+ break;
+ }
+}
+
+static void close_device(void)
+{
+ if (-1 == close(fd))
+ errno_exit("close");
+
+ fd = -1;
+}
+
+static void open_device(void)
+{
+ struct stat st;
+
+ if (-1 == stat(dev_name, &amp;st)) {
+ fprintf(stderr, "Cannot identify '%s': %d, %s\n",
+ dev_name, errno, strerror(errno));
+ exit(EXIT_FAILURE);
+ }
+
+ if (!S_ISCHR(st.st_mode)) {
+ fprintf(stderr, "%s is no device\n", dev_name);
+ exit(EXIT_FAILURE);
+ }
+
+ fd = open(dev_name, O_RDWR /* required */ | O_NONBLOCK, 0);
+
+ if (-1 == fd) {
+ fprintf(stderr, "Cannot open '%s': %d, %s\n",
+ dev_name, errno, strerror(errno));
+ exit(EXIT_FAILURE);
+ }
+}
+
+static void usage(FILE *fp, int argc, char **argv)
+{
+ fprintf(fp,
+ "Usage: %s [options]\n\n"
+ "Version 1.3\n"
+ "Options:\n"
+ "-d | --device name Video device name [%s]\n"
+ "-h | --help Print this message\n"
+ "-m | --mmap Use memory mapped buffers [default]\n"
+ "-r | --read Use read() calls\n"
+ "-u | --userp Use application allocated buffers\n"
+ "-o | --output Outputs stream to stdout\n"
+ "-f | --format Force format to 640x480 YUYV\n"
+ "-c | --count Number of frames to grab [%i]\n"
+ "",
+ argv[0], dev_name, frame_count);
+}
+
+static const char short_options[] = "d:hmruofc:";
+
+static const struct option
+long_options[] = {
+ { "device", required_argument, NULL, 'd' },
+ { "help", no_argument, NULL, 'h' },
+ { "mmap", no_argument, NULL, 'm' },
+ { "read", no_argument, NULL, 'r' },
+ { "userp", no_argument, NULL, 'u' },
+ { "output", no_argument, NULL, 'o' },
+ { "format", no_argument, NULL, 'f' },
+ { "count", required_argument, NULL, 'c' },
+ { 0, 0, 0, 0 }
+};
+
+int main(int argc, char **argv)
+{
+ dev_name = "/dev/video0";
+
+ for (;;) {
+ int idx;
+ int c;
+
+ c = getopt_long(argc, argv,
+ short_options, long_options, &amp;idx);
+
+ if (-1 == c)
+ break;
+
+ switch (c) {
+ case 0: /* getopt_long() flag */
+ break;
+
+ case 'd':
+ dev_name = optarg;
+ break;
+
+ case 'h':
+ usage(stdout, argc, argv);
+ exit(EXIT_SUCCESS);
+
+ case 'm':
+ io = IO_METHOD_MMAP;
+ break;
+
+ case 'r':
+ io = IO_METHOD_READ;
+ break;
+
+ case 'u':
+ io = IO_METHOD_USERPTR;
+ break;
+
+ case 'o':
+ out_buf++;
+ break;
+
+ case 'f':
+ force_format++;
+ break;
+
+ case 'c':
+ errno = 0;
+ frame_count = strtol(optarg, NULL, 0);
+ if (errno)
+ errno_exit(optarg);
+ break;
+
+ default:
+ usage(stderr, argc, argv);
+ exit(EXIT_FAILURE);
+ }
+ }
+
+ open_device();
+ init_device();
+ start_capturing();
+ mainloop();
+ stop_capturing();
+ uninit_device();
+ close_device();
+ fprintf(stderr, "\n");
+ return 0;
+}
+</programlisting>
diff --git a/Documentation/DocBook/media/v4l/common.xml b/Documentation/DocBook/media/v4l/common.xml
new file mode 100644
index 000000000..8b5e01422
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/common.xml
@@ -0,0 +1,1102 @@
+ <title>Common API Elements</title>
+
+ <para>Programming a V4L2 device consists of these
+steps:</para>
+
+ <itemizedlist>
+ <listitem>
+ <para>Opening the device</para>
+ </listitem>
+ <listitem>
+ <para>Changing device properties, selecting a video and audio
+input, video standard, picture brightness a.&nbsp;o.</para>
+ </listitem>
+ <listitem>
+ <para>Negotiating a data format</para>
+ </listitem>
+ <listitem>
+ <para>Negotiating an input/output method</para>
+ </listitem>
+ <listitem>
+ <para>The actual input/output loop</para>
+ </listitem>
+ <listitem>
+ <para>Closing the device</para>
+ </listitem>
+ </itemizedlist>
+
+ <para>In practice most steps are optional and can be executed out of
+order. It depends on the V4L2 device type, you can read about the
+details in <xref linkend="devices" />. In this chapter we will discuss
+the basic concepts applicable to all devices.</para>
+
+ <section id="open">
+ <title>Opening and Closing Devices</title>
+
+ <section>
+ <title>Device Naming</title>
+
+ <para>V4L2 drivers are implemented as kernel modules, loaded
+manually by the system administrator or automatically when a device is
+first discovered. The driver modules plug into the "videodev" kernel
+module. It provides helper functions and a common application
+interface specified in this document.</para>
+
+ <para>Each driver thus loaded registers one or more device nodes
+with major number 81 and a minor number between 0 and 255. Minor numbers
+are allocated dynamically unless the kernel is compiled with the kernel
+option CONFIG_VIDEO_FIXED_MINOR_RANGES. In that case minor numbers are
+allocated in ranges depending on the device node type (video, radio, etc.).</para>
+
+ <para>Many drivers support "video_nr", "radio_nr" or "vbi_nr"
+module options to select specific video/radio/vbi node numbers. This allows
+the user to request that the device node is named e.g. /dev/video5 instead
+of leaving it to chance. When the driver supports multiple devices of the same
+type more than one device node number can be assigned, separated by commas:
+ <informalexample>
+ <screen>
+&gt; modprobe mydriver video_nr=0,1 radio_nr=0,1</screen>
+ </informalexample></para>
+
+ <para>In <filename>/etc/modules.conf</filename> this may be
+written as: <informalexample>
+ <screen>
+options mydriver video_nr=0,1 radio_nr=0,1
+ </screen>
+ </informalexample> When no device node number is given as module
+option the driver supplies a default.</para>
+
+ <para>Normally udev will create the device nodes in /dev automatically
+for you. If udev is not installed, then you need to enable the
+CONFIG_VIDEO_FIXED_MINOR_RANGES kernel option in order to be able to correctly
+relate a minor number to a device node number. I.e., you need to be certain
+that minor number 5 maps to device node name video5. With this kernel option
+different device types have different minor number ranges. These ranges are
+listed in <xref linkend="devices" />.
+</para>
+
+ <para>The creation of character special files (with
+<application>mknod</application>) is a privileged operation and
+devices cannot be opened by major and minor number. That means
+applications cannot <emphasis>reliable</emphasis> scan for loaded or
+installed drivers. The user must enter a device name, or the
+application can try the conventional device names.</para>
+ </section>
+
+ <section id="related">
+ <title>Related Devices</title>
+
+ <para>Devices can support several functions. For example
+video capturing, VBI capturing and radio support.</para>
+
+ <para>The V4L2 API creates different nodes for each of these functions.</para>
+
+ <para>The V4L2 API was designed with the idea that one device node could support
+all functions. However, in practice this never worked: this 'feature'
+was never used by applications and many drivers did not support it and if
+they did it was certainly never tested. In addition, switching a device
+node between different functions only works when using the streaming I/O
+API, not with the read()/write() API.</para>
+
+ <para>Today each device node supports just one function.</para>
+
+ <para>Besides video input or output the hardware may also
+support audio sampling or playback. If so, these functions are
+implemented as ALSA PCM devices with optional ALSA audio mixer
+devices.</para>
+
+ <para>One problem with all these devices is that the V4L2 API
+makes no provisions to find these related devices. Some really
+complex devices use the Media Controller (see <xref linkend="media_controller" />)
+which can be used for this purpose. But most drivers do not use it,
+and while some code exists that uses sysfs to discover related devices
+(see libmedia_dev in the <ulink url="http://git.linuxtv.org/cgit.cgi/v4l-utils.git/">v4l-utils</ulink>
+git repository), there is no library yet that can provide a single API towards
+both Media Controller-based devices and devices that do not use the Media Controller.
+If you want to work on this please write to the linux-media mailing list: &v4l-ml;.</para>
+ </section>
+
+ <section>
+ <title>Multiple Opens</title>
+
+ <para>V4L2 devices can be opened more than once.<footnote><para>
+There are still some old and obscure drivers that have not been updated to
+allow for multiple opens. This implies that for such drivers &func-open; can
+return an &EBUSY; when the device is already in use.</para></footnote>
+When this is supported by the driver, users can for example start a
+"panel" application to change controls like brightness or audio
+volume, while another application captures video and audio. In other words, panel
+applications are comparable to an ALSA audio mixer application.
+Just opening a V4L2 device should not change the state of the device.<footnote>
+<para>Unfortunately, opening a radio device often switches the state of the
+device to radio mode in many drivers. This behavior should be fixed eventually
+as it violates the V4L2 specification.</para></footnote></para>
+
+ <para>Once an application has allocated the memory buffers needed for
+streaming data (by calling the &VIDIOC-REQBUFS; or &VIDIOC-CREATE-BUFS; ioctls,
+or implicitly by calling the &func-read; or &func-write; functions) that
+application (filehandle) becomes the owner of the device. It is no longer
+allowed to make changes that would affect the buffer sizes (e.g. by calling
+the &VIDIOC-S-FMT; ioctl) and other applications are no longer allowed to allocate
+buffers or start or stop streaming. The &EBUSY; will be returned instead.</para>
+
+ <para>Merely opening a V4L2 device does not grant exclusive
+access.<footnote>
+ <para>Drivers could recognize the
+<constant>O_EXCL</constant> open flag. Presently this is not required,
+so applications cannot know if it really works.</para>
+ </footnote> Initiating data exchange however assigns the right
+to read or write the requested type of data, and to change related
+properties, to this file descriptor. Applications can request
+additional access privileges using the priority mechanism described in
+<xref linkend="app-pri" />.</para>
+ </section>
+
+ <section>
+ <title>Shared Data Streams</title>
+
+ <para>V4L2 drivers should not support multiple applications
+reading or writing the same data stream on a device by copying
+buffers, time multiplexing or similar means. This is better handled by
+a proxy application in user space.</para>
+ </section>
+
+ <section>
+ <title>Functions</title>
+
+ <para>To open and close V4L2 devices applications use the
+&func-open; and &func-close; function, respectively. Devices are
+programmed using the &func-ioctl; function as explained in the
+following sections.</para>
+ </section>
+ </section>
+
+ <section id="querycap">
+ <title>Querying Capabilities</title>
+
+ <para>Because V4L2 covers a wide variety of devices not all
+aspects of the API are equally applicable to all types of devices.
+Furthermore devices of the same type have different capabilities and
+this specification permits the omission of a few complicated and less
+important parts of the API.</para>
+
+ <para>The &VIDIOC-QUERYCAP; ioctl is available to check if the kernel
+device is compatible with this specification, and to query the <link
+linkend="devices">functions</link> and <link linkend="io">I/O
+methods</link> supported by the device.</para>
+
+ <para>Starting with kernel version 3.1, VIDIOC-QUERYCAP will return the
+V4L2 API version used by the driver, with generally matches the Kernel version.
+There's no need of using &VIDIOC-QUERYCAP; to check if a specific ioctl is
+supported, the V4L2 core now returns ENOTTY if a driver doesn't provide
+support for an ioctl.</para>
+
+ <para>Other features can be queried
+by calling the respective ioctl, for example &VIDIOC-ENUMINPUT;
+to learn about the number, types and names of video connectors on the
+device. Although abstraction is a major objective of this API, the
+&VIDIOC-QUERYCAP; ioctl also allows driver specific applications to reliably identify
+the driver.</para>
+
+ <para>All V4L2 drivers must support
+<constant>VIDIOC_QUERYCAP</constant>. Applications should always call
+this ioctl after opening the device.</para>
+ </section>
+
+ <section id="app-pri">
+ <title>Application Priority</title>
+
+ <para>When multiple applications share a device it may be
+desirable to assign them different priorities. Contrary to the
+traditional "rm -rf /" school of thought a video recording application
+could for example block other applications from changing video
+controls or switching the current TV channel. Another objective is to
+permit low priority applications working in background, which can be
+preempted by user controlled applications and automatically regain
+control of the device at a later time.</para>
+
+ <para>Since these features cannot be implemented entirely in user
+space V4L2 defines the &VIDIOC-G-PRIORITY; and &VIDIOC-S-PRIORITY;
+ioctls to request and query the access priority associate with a file
+descriptor. Opening a device assigns a medium priority, compatible
+with earlier versions of V4L2 and drivers not supporting these ioctls.
+Applications requiring a different priority will usually call
+<constant>VIDIOC_S_PRIORITY</constant> after verifying the device with
+the &VIDIOC-QUERYCAP; ioctl.</para>
+
+ <para>Ioctls changing driver properties, such as &VIDIOC-S-INPUT;,
+return an &EBUSY; after another application obtained higher priority.</para>
+ </section>
+
+ <section id="video">
+ <title>Video Inputs and Outputs</title>
+
+ <para>Video inputs and outputs are physical connectors of a
+device. These can be for example RF connectors (antenna/cable), CVBS
+a.k.a. Composite Video, S-Video or RGB connectors. Video and VBI
+capture devices have inputs. Video and VBI output devices have outputs,
+at least one each. Radio devices have no video inputs or outputs.</para>
+
+ <para>To learn about the number and attributes of the
+available inputs and outputs applications can enumerate them with the
+&VIDIOC-ENUMINPUT; and &VIDIOC-ENUMOUTPUT; ioctl, respectively. The
+&v4l2-input; returned by the <constant>VIDIOC_ENUMINPUT</constant>
+ioctl also contains signal status information applicable when the
+current video input is queried.</para>
+
+ <para>The &VIDIOC-G-INPUT; and &VIDIOC-G-OUTPUT; ioctls return the
+index of the current video input or output. To select a different
+input or output applications call the &VIDIOC-S-INPUT; and
+&VIDIOC-S-OUTPUT; ioctls. Drivers must implement all the input ioctls
+when the device has one or more inputs, all the output ioctls when the
+device has one or more outputs.</para>
+
+ <example>
+ <title>Information about the current video input</title>
+
+ <programlisting>
+&v4l2-input; input;
+int index;
+
+if (-1 == ioctl(fd, &VIDIOC-G-INPUT;, &amp;index)) {
+ perror("VIDIOC_G_INPUT");
+ exit(EXIT_FAILURE);
+}
+
+memset(&amp;input, 0, sizeof(input));
+input.index = index;
+
+if (-1 == ioctl(fd, &VIDIOC-ENUMINPUT;, &amp;input)) {
+ perror("VIDIOC_ENUMINPUT");
+ exit(EXIT_FAILURE);
+}
+
+printf("Current input: %s\n", input.name);
+ </programlisting>
+ </example>
+
+ <example>
+ <title>Switching to the first video input</title>
+
+ <programlisting>
+int index;
+
+index = 0;
+
+if (-1 == ioctl(fd, &VIDIOC-S-INPUT;, &amp;index)) {
+ perror("VIDIOC_S_INPUT");
+ exit(EXIT_FAILURE);
+}
+ </programlisting>
+ </example>
+ </section>
+
+ <section id="audio">
+ <title>Audio Inputs and Outputs</title>
+
+ <para>Audio inputs and outputs are physical connectors of a
+device. Video capture devices have inputs, output devices have
+outputs, zero or more each. Radio devices have no audio inputs or
+outputs. They have exactly one tuner which in fact
+<emphasis>is</emphasis> an audio source, but this API associates
+tuners with video inputs or outputs only, and radio devices have
+none of these.<footnote>
+ <para>Actually &v4l2-audio; ought to have a
+<structfield>tuner</structfield> field like &v4l2-input;, not only
+making the API more consistent but also permitting radio devices with
+multiple tuners.</para>
+ </footnote> A connector on a TV card to loop back the received
+audio signal to a sound card is not considered an audio output.</para>
+
+ <para>Audio and video inputs and outputs are associated. Selecting
+a video source also selects an audio source. This is most evident when
+the video and audio source is a tuner. Further audio connectors can
+combine with more than one video input or output. Assumed two
+composite video inputs and two audio inputs exist, there may be up to
+four valid combinations. The relation of video and audio connectors
+is defined in the <structfield>audioset</structfield> field of the
+respective &v4l2-input; or &v4l2-output;, where each bit represents
+the index number, starting at zero, of one audio input or output.</para>
+
+ <para>To learn about the number and attributes of the
+available inputs and outputs applications can enumerate them with the
+&VIDIOC-ENUMAUDIO; and &VIDIOC-ENUMAUDOUT; ioctl, respectively. The
+&v4l2-audio; returned by the <constant>VIDIOC_ENUMAUDIO</constant> ioctl
+also contains signal status information applicable when the current
+audio input is queried.</para>
+
+ <para>The &VIDIOC-G-AUDIO; and &VIDIOC-G-AUDOUT; ioctls report
+the current audio input and output, respectively. Note that, unlike
+&VIDIOC-G-INPUT; and &VIDIOC-G-OUTPUT; these ioctls return a structure
+as <constant>VIDIOC_ENUMAUDIO</constant> and
+<constant>VIDIOC_ENUMAUDOUT</constant> do, not just an index.</para>
+
+ <para>To select an audio input and change its properties
+applications call the &VIDIOC-S-AUDIO; ioctl. To select an audio
+output (which presently has no changeable properties) applications
+call the &VIDIOC-S-AUDOUT; ioctl.</para>
+
+ <para>Drivers must implement all audio input ioctls when the device
+has multiple selectable audio inputs, all audio output ioctls when the
+device has multiple selectable audio outputs. When the device has any
+audio inputs or outputs the driver must set the <constant>V4L2_CAP_AUDIO</constant>
+flag in the &v4l2-capability; returned by the &VIDIOC-QUERYCAP; ioctl.</para>
+
+ <example>
+ <title>Information about the current audio input</title>
+
+ <programlisting>
+&v4l2-audio; audio;
+
+memset(&amp;audio, 0, sizeof(audio));
+
+if (-1 == ioctl(fd, &VIDIOC-G-AUDIO;, &amp;audio)) {
+ perror("VIDIOC_G_AUDIO");
+ exit(EXIT_FAILURE);
+}
+
+printf("Current input: %s\n", audio.name);
+ </programlisting>
+ </example>
+
+ <example>
+ <title>Switching to the first audio input</title>
+
+ <programlisting>
+&v4l2-audio; audio;
+
+memset(&amp;audio, 0, sizeof(audio)); /* clear audio.mode, audio.reserved */
+
+audio.index = 0;
+
+if (-1 == ioctl(fd, &VIDIOC-S-AUDIO;, &amp;audio)) {
+ perror("VIDIOC_S_AUDIO");
+ exit(EXIT_FAILURE);
+}
+ </programlisting>
+ </example>
+ </section>
+
+ <section id="tuner">
+ <title>Tuners and Modulators</title>
+
+ <section>
+ <title>Tuners</title>
+
+ <para>Video input devices can have one or more tuners
+demodulating a RF signal. Each tuner is associated with one or more
+video inputs, depending on the number of RF connectors on the tuner.
+The <structfield>type</structfield> field of the respective
+&v4l2-input; returned by the &VIDIOC-ENUMINPUT; ioctl is set to
+<constant>V4L2_INPUT_TYPE_TUNER</constant> and its
+<structfield>tuner</structfield> field contains the index number of
+the tuner.</para>
+
+ <para>Radio input devices have exactly one tuner with index zero, no
+video inputs.</para>
+
+ <para>To query and change tuner properties applications use the
+&VIDIOC-G-TUNER; and &VIDIOC-S-TUNER; ioctls, respectively. The
+&v4l2-tuner; returned by <constant>VIDIOC_G_TUNER</constant> also
+contains signal status information applicable when the tuner of the
+current video or radio input is queried. Note that
+<constant>VIDIOC_S_TUNER</constant> does not switch the current tuner,
+when there is more than one at all. The tuner is solely determined by
+the current video input. Drivers must support both ioctls and set the
+<constant>V4L2_CAP_TUNER</constant> flag in the &v4l2-capability;
+returned by the &VIDIOC-QUERYCAP; ioctl when the device has one or
+more tuners.</para>
+ </section>
+
+ <section>
+ <title>Modulators</title>
+
+ <para>Video output devices can have one or more modulators, uh,
+modulating a video signal for radiation or connection to the antenna
+input of a TV set or video recorder. Each modulator is associated with
+one or more video outputs, depending on the number of RF connectors on
+the modulator. The <structfield>type</structfield> field of the
+respective &v4l2-output; returned by the &VIDIOC-ENUMOUTPUT; ioctl is
+set to <constant>V4L2_OUTPUT_TYPE_MODULATOR</constant> and its
+<structfield>modulator</structfield> field contains the index number
+of the modulator.</para>
+
+ <para>Radio output devices have exactly one modulator with index
+zero, no video outputs.</para>
+
+ <para>A video or radio device cannot support both a tuner and a
+modulator. Two separate device nodes will have to be used for such
+hardware, one that supports the tuner functionality and one that supports
+the modulator functionality. The reason is a limitation with the
+&VIDIOC-S-FREQUENCY; ioctl where you cannot specify whether the frequency
+is for a tuner or a modulator.</para>
+
+ <para>To query and change modulator properties applications use
+the &VIDIOC-G-MODULATOR; and &VIDIOC-S-MODULATOR; ioctl. Note that
+<constant>VIDIOC_S_MODULATOR</constant> does not switch the current
+modulator, when there is more than one at all. The modulator is solely
+determined by the current video output. Drivers must support both
+ioctls and set the <constant>V4L2_CAP_MODULATOR</constant> flag in
+the &v4l2-capability; returned by the &VIDIOC-QUERYCAP; ioctl when the
+device has one or more modulators.</para>
+ </section>
+
+ <section>
+ <title>Radio Frequency</title>
+
+ <para>To get and set the tuner or modulator radio frequency
+applications use the &VIDIOC-G-FREQUENCY; and &VIDIOC-S-FREQUENCY;
+ioctl which both take a pointer to a &v4l2-frequency;. These ioctls
+are used for TV and radio devices alike. Drivers must support both
+ioctls when the tuner or modulator ioctls are supported, or
+when the device is a radio device.</para>
+ </section>
+ </section>
+
+ <section id="standard">
+ <title>Video Standards</title>
+
+ <para>Video devices typically support one or more different video
+standards or variations of standards. Each video input and output may
+support another set of standards. This set is reported by the
+<structfield>std</structfield> field of &v4l2-input; and
+&v4l2-output; returned by the &VIDIOC-ENUMINPUT; and
+&VIDIOC-ENUMOUTPUT; ioctls, respectively.</para>
+
+ <para>V4L2 defines one bit for each analog video standard
+currently in use worldwide, and sets aside bits for driver defined
+standards, &eg; hybrid standards to watch NTSC video tapes on PAL TVs
+and vice versa. Applications can use the predefined bits to select a
+particular standard, although presenting the user a menu of supported
+standards is preferred. To enumerate and query the attributes of the
+supported standards applications use the &VIDIOC-ENUMSTD; ioctl.</para>
+
+ <para>Many of the defined standards are actually just variations
+of a few major standards. The hardware may in fact not distinguish
+between them, or do so internal and switch automatically. Therefore
+enumerated standards also contain sets of one or more standard
+bits.</para>
+
+ <para>Assume a hypothetic tuner capable of demodulating B/PAL,
+G/PAL and I/PAL signals. The first enumerated standard is a set of B
+and G/PAL, switched automatically depending on the selected radio
+frequency in UHF or VHF band. Enumeration gives a "PAL-B/G" or "PAL-I"
+choice. Similar a Composite input may collapse standards, enumerating
+"PAL-B/G/H/I", "NTSC-M" and "SECAM-D/K".<footnote>
+ <para>Some users are already confused by technical terms PAL,
+NTSC and SECAM. There is no point asking them to distinguish between
+B, G, D, or K when the software or hardware can do that
+automatically.</para>
+ </footnote></para>
+
+ <para>To query and select the standard used by the current video
+input or output applications call the &VIDIOC-G-STD; and
+&VIDIOC-S-STD; ioctl, respectively. The <emphasis>received</emphasis>
+standard can be sensed with the &VIDIOC-QUERYSTD; ioctl. Note that the
+parameter of all these ioctls is a pointer to a &v4l2-std-id; type
+(a standard set), <emphasis>not</emphasis> an index into the standard
+enumeration. Drivers must implement all video standard ioctls
+when the device has one or more video inputs or outputs.</para>
+
+ <para>Special rules apply to devices such as USB cameras where the notion of video
+standards makes little sense. More generally for any capture or output device
+which is: <itemizedlist>
+ <listitem>
+ <para>incapable of capturing fields or frames at the nominal
+rate of the video standard, or</para>
+ </listitem>
+ <listitem>
+ <para>that does not support the video standard formats at all.</para>
+ </listitem>
+ </itemizedlist> Here the driver shall set the
+<structfield>std</structfield> field of &v4l2-input; and &v4l2-output;
+to zero and the <constant>VIDIOC_G_STD</constant>,
+<constant>VIDIOC_S_STD</constant>,
+<constant>VIDIOC_QUERYSTD</constant> and
+<constant>VIDIOC_ENUMSTD</constant> ioctls shall return the
+&ENOTTY; or the &EINVAL;.</para>
+ <para>Applications can make use of the <xref linkend="input-capabilities" /> and
+<xref linkend="output-capabilities"/> flags to determine whether the video standard ioctls
+can be used with the given input or output.</para>
+
+ <example>
+ <title>Information about the current video standard</title>
+
+ <programlisting>
+&v4l2-std-id; std_id;
+&v4l2-standard; standard;
+
+if (-1 == ioctl(fd, &VIDIOC-G-STD;, &amp;std_id)) {
+ /* Note when VIDIOC_ENUMSTD always returns ENOTTY this
+ is no video device or it falls under the USB exception,
+ and VIDIOC_G_STD returning ENOTTY is no error. */
+
+ perror("VIDIOC_G_STD");
+ exit(EXIT_FAILURE);
+}
+
+memset(&amp;standard, 0, sizeof(standard));
+standard.index = 0;
+
+while (0 == ioctl(fd, &VIDIOC-ENUMSTD;, &amp;standard)) {
+ if (standard.id &amp; std_id) {
+ printf("Current video standard: %s\n", standard.name);
+ exit(EXIT_SUCCESS);
+ }
+
+ standard.index++;
+}
+
+/* EINVAL indicates the end of the enumeration, which cannot be
+ empty unless this device falls under the USB exception. */
+
+if (errno == EINVAL || standard.index == 0) {
+ perror("VIDIOC_ENUMSTD");
+ exit(EXIT_FAILURE);
+}
+ </programlisting>
+ </example>
+
+ <example>
+ <title>Listing the video standards supported by the current
+input</title>
+
+ <programlisting>
+&v4l2-input; input;
+&v4l2-standard; standard;
+
+memset(&amp;input, 0, sizeof(input));
+
+if (-1 == ioctl(fd, &VIDIOC-G-INPUT;, &amp;input.index)) {
+ perror("VIDIOC_G_INPUT");
+ exit(EXIT_FAILURE);
+}
+
+if (-1 == ioctl(fd, &VIDIOC-ENUMINPUT;, &amp;input)) {
+ perror("VIDIOC_ENUM_INPUT");
+ exit(EXIT_FAILURE);
+}
+
+printf("Current input %s supports:\n", input.name);
+
+memset(&amp;standard, 0, sizeof(standard));
+standard.index = 0;
+
+while (0 == ioctl(fd, &VIDIOC-ENUMSTD;, &amp;standard)) {
+ if (standard.id &amp; input.std)
+ printf("%s\n", standard.name);
+
+ standard.index++;
+}
+
+/* EINVAL indicates the end of the enumeration, which cannot be
+ empty unless this device falls under the USB exception. */
+
+if (errno != EINVAL || standard.index == 0) {
+ perror("VIDIOC_ENUMSTD");
+ exit(EXIT_FAILURE);
+}
+ </programlisting>
+ </example>
+
+ <example>
+ <title>Selecting a new video standard</title>
+
+ <programlisting>
+&v4l2-input; input;
+&v4l2-std-id; std_id;
+
+memset(&amp;input, 0, sizeof(input));
+
+if (-1 == ioctl(fd, &VIDIOC-G-INPUT;, &amp;input.index)) {
+ perror("VIDIOC_G_INPUT");
+ exit(EXIT_FAILURE);
+}
+
+if (-1 == ioctl(fd, &VIDIOC-ENUMINPUT;, &amp;input)) {
+ perror("VIDIOC_ENUM_INPUT");
+ exit(EXIT_FAILURE);
+}
+
+if (0 == (input.std &amp; V4L2_STD_PAL_BG)) {
+ fprintf(stderr, "Oops. B/G PAL is not supported.\n");
+ exit(EXIT_FAILURE);
+}
+
+/* Note this is also supposed to work when only B
+ <emphasis>or</emphasis> G/PAL is supported. */
+
+std_id = V4L2_STD_PAL_BG;
+
+if (-1 == ioctl(fd, &VIDIOC-S-STD;, &amp;std_id)) {
+ perror("VIDIOC_S_STD");
+ exit(EXIT_FAILURE);
+}
+ </programlisting>
+ </example>
+ </section>
+ <section id="dv-timings">
+ <title>Digital Video (DV) Timings</title>
+ <para>
+ The video standards discussed so far have been dealing with Analog TV and the
+corresponding video timings. Today there are many more different hardware interfaces
+such as High Definition TV interfaces (HDMI), VGA, DVI connectors etc., that carry
+video signals and there is a need to extend the API to select the video timings
+for these interfaces. Since it is not possible to extend the &v4l2-std-id; due to
+the limited bits available, a new set of ioctls was added to set/get video timings at
+the input and output.</para>
+
+ <para>These ioctls deal with the detailed digital video timings that define
+each video format. This includes parameters such as the active video width and height,
+signal polarities, frontporches, backporches, sync widths etc. The <filename>linux/v4l2-dv-timings.h</filename>
+header can be used to get the timings of the formats in the <xref linkend="cea861" /> and
+<xref linkend="vesadmt" /> standards.
+ </para>
+
+ <para>To enumerate and query the attributes of the DV timings supported by a device
+ applications use the &VIDIOC-ENUM-DV-TIMINGS; and &VIDIOC-DV-TIMINGS-CAP; ioctls.
+ To set DV timings for the device applications use the
+&VIDIOC-S-DV-TIMINGS; ioctl and to get current DV timings they use the
+&VIDIOC-G-DV-TIMINGS; ioctl. To detect the DV timings as seen by the video receiver applications
+use the &VIDIOC-QUERY-DV-TIMINGS; ioctl.</para>
+ <para>Applications can make use of the <xref linkend="input-capabilities" /> and
+<xref linkend="output-capabilities"/> flags to determine whether the digital video ioctls
+can be used with the given input or output.</para>
+ </section>
+
+ &sub-controls;
+
+ <section id="format">
+ <title>Data Formats</title>
+
+ <section>
+ <title>Data Format Negotiation</title>
+
+ <para>Different devices exchange different kinds of data with
+applications, for example video images, raw or sliced VBI data, RDS
+datagrams. Even within one kind many different formats are possible,
+in particular an abundance of image formats. Although drivers must
+provide a default and the selection persists across closing and
+reopening a device, applications should always negotiate a data format
+before engaging in data exchange. Negotiation means the application
+asks for a particular format and the driver selects and reports the
+best the hardware can do to satisfy the request. Of course
+applications can also just query the current selection.</para>
+
+ <para>A single mechanism exists to negotiate all data formats
+using the aggregate &v4l2-format; and the &VIDIOC-G-FMT; and
+&VIDIOC-S-FMT; ioctls. Additionally the &VIDIOC-TRY-FMT; ioctl can be
+used to examine what the hardware <emphasis>could</emphasis> do,
+without actually selecting a new data format. The data formats
+supported by the V4L2 API are covered in the respective device section
+in <xref linkend="devices" />. For a closer look at image formats see
+<xref linkend="pixfmt" />.</para>
+
+ <para>The <constant>VIDIOC_S_FMT</constant> ioctl is a major
+turning-point in the initialization sequence. Prior to this point
+multiple panel applications can access the same device concurrently to
+select the current input, change controls or modify other properties.
+The first <constant>VIDIOC_S_FMT</constant> assigns a logical stream
+(video data, VBI data etc.) exclusively to one file descriptor.</para>
+
+ <para>Exclusive means no other application, more precisely no
+other file descriptor, can grab this stream or change device
+properties inconsistent with the negotiated parameters. A video
+standard change for example, when the new standard uses a different
+number of scan lines, can invalidate the selected image format.
+Therefore only the file descriptor owning the stream can make
+invalidating changes. Accordingly multiple file descriptors which
+grabbed different logical streams prevent each other from interfering
+with their settings. When for example video overlay is about to start
+or already in progress, simultaneous video capturing may be restricted
+to the same cropping and image size.</para>
+
+ <para>When applications omit the
+<constant>VIDIOC_S_FMT</constant> ioctl its locking side effects are
+implied by the next step, the selection of an I/O method with the
+&VIDIOC-REQBUFS; ioctl or implicit with the first &func-read; or
+&func-write; call.</para>
+
+ <para>Generally only one logical stream can be assigned to a
+file descriptor, the exception being drivers permitting simultaneous
+video capturing and overlay using the same file descriptor for
+compatibility with V4L and earlier versions of V4L2. Switching the
+logical stream or returning into "panel mode" is possible by closing
+and reopening the device. Drivers <emphasis>may</emphasis> support a
+switch using <constant>VIDIOC_S_FMT</constant>.</para>
+
+ <para>All drivers exchanging data with
+applications must support the <constant>VIDIOC_G_FMT</constant> and
+<constant>VIDIOC_S_FMT</constant> ioctl. Implementation of the
+<constant>VIDIOC_TRY_FMT</constant> is highly recommended but
+optional.</para>
+ </section>
+
+ <section>
+ <title>Image Format Enumeration</title>
+
+ <para>Apart of the generic format negotiation functions
+a special ioctl to enumerate all image formats supported by video
+capture, overlay or output devices is available.<footnote>
+ <para>Enumerating formats an application has no a-priori
+knowledge of (otherwise it could explicitly ask for them and need not
+enumerate) seems useless, but there are applications serving as proxy
+between drivers and the actual video applications for which this is
+useful.</para>
+ </footnote></para>
+
+ <para>The &VIDIOC-ENUM-FMT; ioctl must be supported
+by all drivers exchanging image data with applications.</para>
+
+ <important>
+ <para>Drivers are not supposed to convert image formats in
+kernel space. They must enumerate only formats directly supported by
+the hardware. If necessary driver writers should publish an example
+conversion routine or library for integration into applications.</para>
+ </important>
+ </section>
+ </section>
+
+ &sub-planar-apis;
+
+ <section id="crop">
+ <title>Image Cropping, Insertion and Scaling</title>
+
+ <para>Some video capture devices can sample a subsection of the
+picture and shrink or enlarge it to an image of arbitrary size. We
+call these abilities cropping and scaling. Some video output devices
+can scale an image up or down and insert it at an arbitrary scan line
+and horizontal offset into a video signal.</para>
+
+ <para>Applications can use the following API to select an area in
+the video signal, query the default area and the hardware limits.
+<emphasis>Despite their name, the &VIDIOC-CROPCAP;, &VIDIOC-G-CROP;
+and &VIDIOC-S-CROP; ioctls apply to input as well as output
+devices.</emphasis></para>
+
+ <para>Scaling requires a source and a target. On a video capture
+or overlay device the source is the video signal, and the cropping
+ioctls determine the area actually sampled. The target are images
+read by the application or overlaid onto the graphics screen. Their
+size (and position for an overlay) is negotiated with the
+&VIDIOC-G-FMT; and &VIDIOC-S-FMT; ioctls.</para>
+
+ <para>On a video output device the source are the images passed in
+by the application, and their size is again negotiated with the
+<constant>VIDIOC_G/S_FMT</constant> ioctls, or may be encoded in a
+compressed video stream. The target is the video signal, and the
+cropping ioctls determine the area where the images are
+inserted.</para>
+
+ <para>Source and target rectangles are defined even if the device
+does not support scaling or the <constant>VIDIOC_G/S_CROP</constant>
+ioctls. Their size (and position where applicable) will be fixed in
+this case. <emphasis>All capture and output device must support the
+<constant>VIDIOC_CROPCAP</constant> ioctl such that applications can
+determine if scaling takes place.</emphasis></para>
+
+ <section>
+ <title>Cropping Structures</title>
+
+ <figure id="crop-scale">
+ <title>Image Cropping, Insertion and Scaling</title>
+ <mediaobject>
+ <imageobject>
+ <imagedata fileref="crop.pdf" format="PS" />
+ </imageobject>
+ <imageobject>
+ <imagedata fileref="crop.gif" format="GIF" />
+ </imageobject>
+ <textobject>
+ <phrase>The cropping, insertion and scaling process</phrase>
+ </textobject>
+ </mediaobject>
+ </figure>
+
+ <para>For capture devices the coordinates of the top left
+corner, width and height of the area which can be sampled is given by
+the <structfield>bounds</structfield> substructure of the
+&v4l2-cropcap; returned by the <constant>VIDIOC_CROPCAP</constant>
+ioctl. To support a wide range of hardware this specification does not
+define an origin or units. However by convention drivers should
+horizontally count unscaled samples relative to 0H (the leading edge
+of the horizontal sync pulse, see <xref linkend="vbi-hsync" />).
+Vertically ITU-R line
+numbers of the first field (<xref linkend="vbi-525" />, <xref
+linkend="vbi-625" />), multiplied by two if the driver can capture both
+fields.</para>
+
+ <para>The top left corner, width and height of the source
+rectangle, that is the area actually sampled, is given by &v4l2-crop;
+using the same coordinate system as &v4l2-cropcap;. Applications can
+use the <constant>VIDIOC_G_CROP</constant> and
+<constant>VIDIOC_S_CROP</constant> ioctls to get and set this
+rectangle. It must lie completely within the capture boundaries and
+the driver may further adjust the requested size and/or position
+according to hardware limitations.</para>
+
+ <para>Each capture device has a default source rectangle, given
+by the <structfield>defrect</structfield> substructure of
+&v4l2-cropcap;. The center of this rectangle shall align with the
+center of the active picture area of the video signal, and cover what
+the driver writer considers the complete picture. Drivers shall reset
+the source rectangle to the default when the driver is first loaded,
+but not later.</para>
+
+ <para>For output devices these structures and ioctls are used
+accordingly, defining the <emphasis>target</emphasis> rectangle where
+the images will be inserted into the video signal.</para>
+
+ </section>
+
+ <section>
+ <title>Scaling Adjustments</title>
+
+ <para>Video hardware can have various cropping, insertion and
+scaling limitations. It may only scale up or down, support only
+discrete scaling factors, or have different scaling abilities in
+horizontal and vertical direction. Also it may not support scaling at
+all. At the same time the &v4l2-crop; rectangle may have to be
+aligned, and both the source and target rectangles may have arbitrary
+upper and lower size limits. In particular the maximum
+<structfield>width</structfield> and <structfield>height</structfield>
+in &v4l2-crop; may be smaller than the
+&v4l2-cropcap;.<structfield>bounds</structfield> area. Therefore, as
+usual, drivers are expected to adjust the requested parameters and
+return the actual values selected.</para>
+
+ <para>Applications can change the source or the target rectangle
+first, as they may prefer a particular image size or a certain area in
+the video signal. If the driver has to adjust both to satisfy hardware
+limitations, the last requested rectangle shall take priority, and the
+driver should preferably adjust the opposite one. The &VIDIOC-TRY-FMT;
+ioctl however shall not change the driver state and therefore only
+adjust the requested rectangle.</para>
+
+ <para>Suppose scaling on a video capture device is restricted to
+a factor 1:1 or 2:1 in either direction and the target image size must
+be a multiple of 16&nbsp;&times;&nbsp;16 pixels. The source cropping
+rectangle is set to defaults, which are also the upper limit in this
+example, of 640&nbsp;&times;&nbsp;400 pixels at offset 0,&nbsp;0. An
+application requests an image size of 300&nbsp;&times;&nbsp;225
+pixels, assuming video will be scaled down from the "full picture"
+accordingly. The driver sets the image size to the closest possible
+values 304&nbsp;&times;&nbsp;224, then chooses the cropping rectangle
+closest to the requested size, that is 608&nbsp;&times;&nbsp;224
+(224&nbsp;&times;&nbsp;2:1 would exceed the limit 400). The offset
+0,&nbsp;0 is still valid, thus unmodified. Given the default cropping
+rectangle reported by <constant>VIDIOC_CROPCAP</constant> the
+application can easily propose another offset to center the cropping
+rectangle.</para>
+
+ <para>Now the application may insist on covering an area using a
+picture aspect ratio closer to the original request, so it asks for a
+cropping rectangle of 608&nbsp;&times;&nbsp;456 pixels. The present
+scaling factors limit cropping to 640&nbsp;&times;&nbsp;384, so the
+driver returns the cropping size 608&nbsp;&times;&nbsp;384 and adjusts
+the image size to closest possible 304&nbsp;&times;&nbsp;192.</para>
+
+ </section>
+
+ <section>
+ <title>Examples</title>
+
+ <para>Source and target rectangles shall remain unchanged across
+closing and reopening a device, such that piping data into or out of a
+device will work without special preparations. More advanced
+applications should ensure the parameters are suitable before starting
+I/O.</para>
+
+ <example>
+ <title>Resetting the cropping parameters</title>
+
+ <para>(A video capture device is assumed; change
+<constant>V4L2_BUF_TYPE_VIDEO_CAPTURE</constant> for other
+devices.)</para>
+
+ <programlisting>
+&v4l2-cropcap; cropcap;
+&v4l2-crop; crop;
+
+memset (&amp;cropcap, 0, sizeof (cropcap));
+cropcap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+
+if (-1 == ioctl (fd, &VIDIOC-CROPCAP;, &amp;cropcap)) {
+ perror ("VIDIOC_CROPCAP");
+ exit (EXIT_FAILURE);
+}
+
+memset (&amp;crop, 0, sizeof (crop));
+crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+crop.c = cropcap.defrect;
+
+/* Ignore if cropping is not supported (EINVAL). */
+
+if (-1 == ioctl (fd, &VIDIOC-S-CROP;, &amp;crop)
+ &amp;&amp; errno != EINVAL) {
+ perror ("VIDIOC_S_CROP");
+ exit (EXIT_FAILURE);
+}
+ </programlisting>
+ </example>
+
+ <example>
+ <title>Simple downscaling</title>
+
+ <para>(A video capture device is assumed.)</para>
+
+ <programlisting>
+&v4l2-cropcap; cropcap;
+&v4l2-format; format;
+
+reset_cropping_parameters ();
+
+/* Scale down to 1/4 size of full picture. */
+
+memset (&amp;format, 0, sizeof (format)); /* defaults */
+
+format.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+
+format.fmt.pix.width = cropcap.defrect.width &gt;&gt; 1;
+format.fmt.pix.height = cropcap.defrect.height &gt;&gt; 1;
+format.fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
+
+if (-1 == ioctl (fd, &VIDIOC-S-FMT;, &amp;format)) {
+ perror ("VIDIOC_S_FORMAT");
+ exit (EXIT_FAILURE);
+}
+
+/* We could check the actual image size now, the actual scaling factor
+ or if the driver can scale at all. */
+ </programlisting>
+ </example>
+
+ <example>
+ <title>Selecting an output area</title>
+
+ <programlisting>
+&v4l2-cropcap; cropcap;
+&v4l2-crop; crop;
+
+memset (&amp;cropcap, 0, sizeof (cropcap));
+cropcap.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
+
+if (-1 == ioctl (fd, VIDIOC_CROPCAP;, &amp;cropcap)) {
+ perror ("VIDIOC_CROPCAP");
+ exit (EXIT_FAILURE);
+}
+
+memset (&amp;crop, 0, sizeof (crop));
+
+crop.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
+crop.c = cropcap.defrect;
+
+/* Scale the width and height to 50 % of their original size
+ and center the output. */
+
+crop.c.width /= 2;
+crop.c.height /= 2;
+crop.c.left += crop.c.width / 2;
+crop.c.top += crop.c.height / 2;
+
+/* Ignore if cropping is not supported (EINVAL). */
+
+if (-1 == ioctl (fd, VIDIOC_S_CROP, &amp;crop)
+ &amp;&amp; errno != EINVAL) {
+ perror ("VIDIOC_S_CROP");
+ exit (EXIT_FAILURE);
+}
+</programlisting>
+ </example>
+
+ <example>
+ <title>Current scaling factor and pixel aspect</title>
+
+ <para>(A video capture device is assumed.)</para>
+
+ <programlisting>
+&v4l2-cropcap; cropcap;
+&v4l2-crop; crop;
+&v4l2-format; format;
+double hscale, vscale;
+double aspect;
+int dwidth, dheight;
+
+memset (&amp;cropcap, 0, sizeof (cropcap));
+cropcap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+
+if (-1 == ioctl (fd, &VIDIOC-CROPCAP;, &amp;cropcap)) {
+ perror ("VIDIOC_CROPCAP");
+ exit (EXIT_FAILURE);
+}
+
+memset (&amp;crop, 0, sizeof (crop));
+crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+
+if (-1 == ioctl (fd, &VIDIOC-G-CROP;, &amp;crop)) {
+ if (errno != EINVAL) {
+ perror ("VIDIOC_G_CROP");
+ exit (EXIT_FAILURE);
+ }
+
+ /* Cropping not supported. */
+ crop.c = cropcap.defrect;
+}
+
+memset (&amp;format, 0, sizeof (format));
+format.fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+
+if (-1 == ioctl (fd, &VIDIOC-G-FMT;, &amp;format)) {
+ perror ("VIDIOC_G_FMT");
+ exit (EXIT_FAILURE);
+}
+
+/* The scaling applied by the driver. */
+
+hscale = format.fmt.pix.width / (double) crop.c.width;
+vscale = format.fmt.pix.height / (double) crop.c.height;
+
+aspect = cropcap.pixelaspect.numerator /
+ (double) cropcap.pixelaspect.denominator;
+aspect = aspect * hscale / vscale;
+
+/* Devices following ITU-R BT.601 do not capture
+ square pixels. For playback on a computer monitor
+ we should scale the images to this size. */
+
+dwidth = format.fmt.pix.width / aspect;
+dheight = format.fmt.pix.height;
+ </programlisting>
+ </example>
+ </section>
+ </section>
+
+ &sub-selection-api;
+
+ <section id="streaming-par">
+ <title>Streaming Parameters</title>
+
+ <para>Streaming parameters are intended to optimize the video
+capture process as well as I/O. Presently applications can request a
+high quality capture mode with the &VIDIOC-S-PARM; ioctl.</para>
+
+ <para>The current video standard determines a nominal number of
+frames per second. If less than this number of frames is to be
+captured or output, applications can request frame skipping or
+duplicating on the driver side. This is especially useful when using
+the &func-read; or &func-write;, which are not augmented by timestamps
+or sequence counters, and to avoid unnecessary data copying.</para>
+
+ <para>Finally these ioctls can be used to determine the number of
+buffers used internally by a driver in read/write mode. For
+implications see the section discussing the &func-read;
+function.</para>
+
+ <para>To get and set the streaming parameters applications call
+the &VIDIOC-G-PARM; and &VIDIOC-S-PARM; ioctl, respectively. They take
+a pointer to a &v4l2-streamparm;, which contains a union holding
+separate parameters for input and output devices.</para>
+
+ <para>These ioctls are optional, drivers need not implement
+them. If so, they return the &EINVAL;.</para>
+ </section>
diff --git a/Documentation/DocBook/media/v4l/compat.xml b/Documentation/DocBook/media/v4l/compat.xml
new file mode 100644
index 000000000..a0aef85d3
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/compat.xml
@@ -0,0 +1,2741 @@
+ <title>Changes</title>
+
+ <para>The following chapters document the evolution of the V4L2 API,
+errata or extensions. They are also intended to help application and
+driver writers to port or update their code.</para>
+
+ <section id="diff-v4l">
+ <title>Differences between V4L and V4L2</title>
+
+ <para>The Video For Linux API was first introduced in Linux 2.1 to
+unify and replace various TV and radio device related interfaces,
+developed independently by driver writers in prior years. Starting
+with Linux 2.5 the much improved V4L2 API replaces the V4L API.
+The support for the old V4L calls were removed from Kernel, but the
+library <xref linkend="libv4l" /> supports the conversion of a V4L
+API system call into a V4L2 one.</para>
+
+ <section>
+ <title>Opening and Closing Devices</title>
+
+ <para>For compatibility reasons the character device file names
+recommended for V4L2 video capture, overlay, radio and raw
+vbi capture devices did not change from those used by V4L. They are
+listed in <xref linkend="devices" /> and below in <xref
+ linkend="v4l-dev" />.</para>
+
+ <para>The teletext devices (minor range 192-223) have been removed in
+V4L2 and no longer exist. There is no hardware available anymore for handling
+pure teletext. Instead raw or sliced VBI is used.</para>
+
+ <para>The V4L <filename>videodev</filename> module automatically
+assigns minor numbers to drivers in load order, depending on the
+registered device type. We recommend that V4L2 drivers by default
+register devices with the same numbers, but the system administrator
+can assign arbitrary minor numbers using driver module options. The
+major device number remains 81.</para>
+
+ <table id="v4l-dev">
+ <title>V4L Device Types, Names and Numbers</title>
+ <tgroup cols="3">
+ <thead>
+ <row>
+ <entry>Device Type</entry>
+ <entry>File Name</entry>
+ <entry>Minor Numbers</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row>
+ <entry>Video capture and overlay</entry>
+ <entry><para><filename>/dev/video</filename> and
+<filename>/dev/bttv0</filename><footnote> <para>According to
+Documentation/devices.txt these should be symbolic links to
+<filename>/dev/video0</filename>. Note the original bttv interface is
+not compatible with V4L or V4L2.</para> </footnote>,
+<filename>/dev/video0</filename> to
+<filename>/dev/video63</filename></para></entry>
+ <entry>0-63</entry>
+ </row>
+ <row>
+ <entry>Radio receiver</entry>
+ <entry><para><filename>/dev/radio</filename><footnote>
+ <para>According to
+<filename>Documentation/devices.txt</filename> a symbolic link to
+<filename>/dev/radio0</filename>.</para>
+ </footnote>, <filename>/dev/radio0</filename> to
+<filename>/dev/radio63</filename></para></entry>
+ <entry>64-127</entry>
+ </row>
+ <row>
+ <entry>Raw VBI capture</entry>
+ <entry><para><filename>/dev/vbi</filename>,
+<filename>/dev/vbi0</filename> to
+<filename>/dev/vbi31</filename></para></entry>
+ <entry>224-255</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <para>V4L prohibits (or used to prohibit) multiple opens of a
+device file. V4L2 drivers <emphasis>may</emphasis> support multiple
+opens, see <xref linkend="open" /> for details and consequences.</para>
+
+ <para>V4L drivers respond to V4L2 ioctls with an &EINVAL;.</para>
+ </section>
+
+ <section>
+ <title>Querying Capabilities</title>
+
+ <para>The V4L <constant>VIDIOCGCAP</constant> ioctl is
+equivalent to V4L2's &VIDIOC-QUERYCAP;.</para>
+
+ <para>The <structfield>name</structfield> field in struct
+<structname>video_capability</structname> became
+<structfield>card</structfield> in &v4l2-capability;,
+<structfield>type</structfield> was replaced by
+<structfield>capabilities</structfield>. Note V4L2 does not
+distinguish between device types like this, better think of basic
+video input, video output and radio devices supporting a set of
+related functions like video capturing, video overlay and VBI
+capturing. See <xref linkend="open" /> for an
+introduction.<informaltable>
+ <tgroup cols="3">
+ <thead>
+ <row>
+ <entry>struct
+<structname>video_capability</structname>
+<structfield>type</structfield></entry>
+ <entry>&v4l2-capability;
+<structfield>capabilities</structfield> flags</entry>
+ <entry>Purpose</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row>
+ <entry><constant>VID_TYPE_CAPTURE</constant></entry>
+ <entry><constant>V4L2_CAP_VIDEO_CAPTURE</constant></entry>
+ <entry>The <link linkend="capture">video
+capture</link> interface is supported.</entry>
+ </row>
+ <row>
+ <entry><constant>VID_TYPE_TUNER</constant></entry>
+ <entry><constant>V4L2_CAP_TUNER</constant></entry>
+ <entry>The device has a <link linkend="tuner">tuner or
+modulator</link>.</entry>
+ </row>
+ <row>
+ <entry><constant>VID_TYPE_TELETEXT</constant></entry>
+ <entry><constant>V4L2_CAP_VBI_CAPTURE</constant></entry>
+ <entry>The <link linkend="raw-vbi">raw VBI
+capture</link> interface is supported.</entry>
+ </row>
+ <row>
+ <entry><constant>VID_TYPE_OVERLAY</constant></entry>
+ <entry><constant>V4L2_CAP_VIDEO_OVERLAY</constant></entry>
+ <entry>The <link linkend="overlay">video
+overlay</link> interface is supported.</entry>
+ </row>
+ <row>
+ <entry><constant>VID_TYPE_CHROMAKEY</constant></entry>
+ <entry><constant>V4L2_FBUF_CAP_CHROMAKEY</constant> in
+field <structfield>capability</structfield> of
+&v4l2-framebuffer;</entry>
+ <entry>Whether chromakey overlay is supported. For
+more information on overlay see
+<xref linkend="overlay" />.</entry>
+ </row>
+ <row>
+ <entry><constant>VID_TYPE_CLIPPING</constant></entry>
+ <entry><constant>V4L2_FBUF_CAP_LIST_CLIPPING</constant>
+and <constant>V4L2_FBUF_CAP_BITMAP_CLIPPING</constant> in field
+<structfield>capability</structfield> of &v4l2-framebuffer;</entry>
+ <entry>Whether clipping the overlaid image is
+supported, see <xref linkend="overlay" />.</entry>
+ </row>
+ <row>
+ <entry><constant>VID_TYPE_FRAMERAM</constant></entry>
+ <entry><constant>V4L2_FBUF_CAP_EXTERNOVERLAY</constant>
+<emphasis>not set</emphasis> in field
+<structfield>capability</structfield> of &v4l2-framebuffer;</entry>
+ <entry>Whether overlay overwrites frame buffer memory,
+see <xref linkend="overlay" />.</entry>
+ </row>
+ <row>
+ <entry><constant>VID_TYPE_SCALES</constant></entry>
+ <entry><constant>-</constant></entry>
+ <entry>This flag indicates if the hardware can scale
+images. The V4L2 API implies the scale factor by setting the cropping
+dimensions and image size with the &VIDIOC-S-CROP; and &VIDIOC-S-FMT;
+ioctl, respectively. The driver returns the closest sizes possible.
+For more information on cropping and scaling see <xref
+ linkend="crop" />.</entry>
+ </row>
+ <row>
+ <entry><constant>VID_TYPE_MONOCHROME</constant></entry>
+ <entry><constant>-</constant></entry>
+ <entry>Applications can enumerate the supported image
+formats with the &VIDIOC-ENUM-FMT; ioctl to determine if the device
+supports grey scale capturing only. For more information on image
+formats see <xref linkend="pixfmt" />.</entry>
+ </row>
+ <row>
+ <entry><constant>VID_TYPE_SUBCAPTURE</constant></entry>
+ <entry><constant>-</constant></entry>
+ <entry>Applications can call the &VIDIOC-G-CROP; ioctl
+to determine if the device supports capturing a subsection of the full
+picture ("cropping" in V4L2). If not, the ioctl returns the &EINVAL;.
+For more information on cropping and scaling see <xref
+ linkend="crop" />.</entry>
+ </row>
+ <row>
+ <entry><constant>VID_TYPE_MPEG_DECODER</constant></entry>
+ <entry><constant>-</constant></entry>
+ <entry>Applications can enumerate the supported image
+formats with the &VIDIOC-ENUM-FMT; ioctl to determine if the device
+supports MPEG streams.</entry>
+ </row>
+ <row>
+ <entry><constant>VID_TYPE_MPEG_ENCODER</constant></entry>
+ <entry><constant>-</constant></entry>
+ <entry>See above.</entry>
+ </row>
+ <row>
+ <entry><constant>VID_TYPE_MJPEG_DECODER</constant></entry>
+ <entry><constant>-</constant></entry>
+ <entry>See above.</entry>
+ </row>
+ <row>
+ <entry><constant>VID_TYPE_MJPEG_ENCODER</constant></entry>
+ <entry><constant>-</constant></entry>
+ <entry>See above.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable></para>
+
+ <para>The <structfield>audios</structfield> field was replaced
+by <structfield>capabilities</structfield> flag
+<constant>V4L2_CAP_AUDIO</constant>, indicating
+<emphasis>if</emphasis> the device has any audio inputs or outputs. To
+determine their number applications can enumerate audio inputs with
+the &VIDIOC-G-AUDIO; ioctl. The audio ioctls are described in <xref
+ linkend="audio" />.</para>
+
+ <para>The <structfield>maxwidth</structfield>,
+<structfield>maxheight</structfield>,
+<structfield>minwidth</structfield> and
+<structfield>minheight</structfield> fields were removed. Calling the
+&VIDIOC-S-FMT; or &VIDIOC-TRY-FMT; ioctl with the desired dimensions
+returns the closest size possible, taking into account the current
+video standard, cropping and scaling limitations.</para>
+ </section>
+
+ <section>
+ <title>Video Sources</title>
+
+ <para>V4L provides the <constant>VIDIOCGCHAN</constant> and
+<constant>VIDIOCSCHAN</constant> ioctl using struct
+<structname>video_channel</structname> to enumerate
+the video inputs of a V4L device. The equivalent V4L2 ioctls
+are &VIDIOC-ENUMINPUT;, &VIDIOC-G-INPUT; and &VIDIOC-S-INPUT;
+using &v4l2-input; as discussed in <xref linkend="video" />.</para>
+
+ <para>The <structfield>channel</structfield> field counting
+inputs was renamed to <structfield>index</structfield>, the video
+input types were renamed as follows: <informaltable>
+ <tgroup cols="2">
+ <thead>
+ <row>
+ <entry>struct <structname>video_channel</structname>
+<structfield>type</structfield></entry>
+ <entry>&v4l2-input;
+<structfield>type</structfield></entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row>
+ <entry><constant>VIDEO_TYPE_TV</constant></entry>
+ <entry><constant>V4L2_INPUT_TYPE_TUNER</constant></entry>
+ </row>
+ <row>
+ <entry><constant>VIDEO_TYPE_CAMERA</constant></entry>
+ <entry><constant>V4L2_INPUT_TYPE_CAMERA</constant></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable></para>
+
+ <para>Unlike the <structfield>tuners</structfield> field
+expressing the number of tuners of this input, V4L2 assumes each video
+input is connected to at most one tuner. However a tuner can have more
+than one input, &ie; RF connectors, and a device can have multiple
+tuners. The index number of the tuner associated with the input, if
+any, is stored in field <structfield>tuner</structfield> of
+&v4l2-input;. Enumeration of tuners is discussed in <xref
+ linkend="tuner" />.</para>
+
+ <para>The redundant <constant>VIDEO_VC_TUNER</constant> flag was
+dropped. Video inputs associated with a tuner are of type
+<constant>V4L2_INPUT_TYPE_TUNER</constant>. The
+<constant>VIDEO_VC_AUDIO</constant> flag was replaced by the
+<structfield>audioset</structfield> field. V4L2 considers devices with
+up to 32 audio inputs. Each set bit in the
+<structfield>audioset</structfield> field represents one audio input
+this video input combines with. For information about audio inputs and
+how to switch between them see <xref linkend="audio" />.</para>
+
+ <para>The <structfield>norm</structfield> field describing the
+supported video standards was replaced by
+<structfield>std</structfield>. The V4L specification mentions a flag
+<constant>VIDEO_VC_NORM</constant> indicating whether the standard can
+be changed. This flag was a later addition together with the
+<structfield>norm</structfield> field and has been removed in the
+meantime. V4L2 has a similar, albeit more comprehensive approach
+to video standards, see <xref linkend="standard" /> for more
+information.</para>
+ </section>
+
+ <section>
+ <title>Tuning</title>
+
+ <para>The V4L <constant>VIDIOCGTUNER</constant> and
+<constant>VIDIOCSTUNER</constant> ioctl and struct
+<structname>video_tuner</structname> can be used to enumerate the
+tuners of a V4L TV or radio device. The equivalent V4L2 ioctls are
+&VIDIOC-G-TUNER; and &VIDIOC-S-TUNER; using &v4l2-tuner;. Tuners are
+covered in <xref linkend="tuner" />.</para>
+
+ <para>The <structfield>tuner</structfield> field counting tuners
+was renamed to <structfield>index</structfield>. The fields
+<structfield>name</structfield>, <structfield>rangelow</structfield>
+and <structfield>rangehigh</structfield> remained unchanged.</para>
+
+ <para>The <constant>VIDEO_TUNER_PAL</constant>,
+<constant>VIDEO_TUNER_NTSC</constant> and
+<constant>VIDEO_TUNER_SECAM</constant> flags indicating the supported
+video standards were dropped. This information is now contained in the
+associated &v4l2-input;. No replacement exists for the
+<constant>VIDEO_TUNER_NORM</constant> flag indicating whether the
+video standard can be switched. The <structfield>mode</structfield>
+field to select a different video standard was replaced by a whole new
+set of ioctls and structures described in <xref linkend="standard" />.
+Due to its ubiquity it should be mentioned the BTTV driver supports
+several standards in addition to the regular
+<constant>VIDEO_MODE_PAL</constant> (0),
+<constant>VIDEO_MODE_NTSC</constant>,
+<constant>VIDEO_MODE_SECAM</constant> and
+<constant>VIDEO_MODE_AUTO</constant> (3). Namely N/PAL Argentina,
+M/PAL, N/PAL, and NTSC Japan with numbers 3-6 (sic).</para>
+
+ <para>The <constant>VIDEO_TUNER_STEREO_ON</constant> flag
+indicating stereo reception became
+<constant>V4L2_TUNER_SUB_STEREO</constant> in field
+<structfield>rxsubchans</structfield>. This field also permits the
+detection of monaural and bilingual audio, see the definition of
+&v4l2-tuner; for details. Presently no replacement exists for the
+<constant>VIDEO_TUNER_RDS_ON</constant> and
+<constant>VIDEO_TUNER_MBS_ON</constant> flags.</para>
+
+ <para> The <constant>VIDEO_TUNER_LOW</constant> flag was renamed
+to <constant>V4L2_TUNER_CAP_LOW</constant> in the &v4l2-tuner;
+<structfield>capability</structfield> field.</para>
+
+ <para>The <constant>VIDIOCGFREQ</constant> and
+<constant>VIDIOCSFREQ</constant> ioctl to change the tuner frequency
+where renamed to &VIDIOC-G-FREQUENCY; and &VIDIOC-S-FREQUENCY;. They
+take a pointer to a &v4l2-frequency; instead of an unsigned long
+integer.</para>
+ </section>
+
+ <section id="v4l-image-properties">
+ <title>Image Properties</title>
+
+ <para>V4L2 has no equivalent of the
+<constant>VIDIOCGPICT</constant> and <constant>VIDIOCSPICT</constant>
+ioctl and struct <structname>video_picture</structname>. The following
+fields where replaced by V4L2 controls accessible with the
+&VIDIOC-QUERYCTRL;, &VIDIOC-G-CTRL; and &VIDIOC-S-CTRL; ioctls:<informaltable>
+ <tgroup cols="2">
+ <thead>
+ <row>
+ <entry>struct <structname>video_picture</structname></entry>
+ <entry>V4L2 Control ID</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row>
+ <entry><structfield>brightness</structfield></entry>
+ <entry><constant>V4L2_CID_BRIGHTNESS</constant></entry>
+ </row>
+ <row>
+ <entry><structfield>hue</structfield></entry>
+ <entry><constant>V4L2_CID_HUE</constant></entry>
+ </row>
+ <row>
+ <entry><structfield>colour</structfield></entry>
+ <entry><constant>V4L2_CID_SATURATION</constant></entry>
+ </row>
+ <row>
+ <entry><structfield>contrast</structfield></entry>
+ <entry><constant>V4L2_CID_CONTRAST</constant></entry>
+ </row>
+ <row>
+ <entry><structfield>whiteness</structfield></entry>
+ <entry><constant>V4L2_CID_WHITENESS</constant></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable></para>
+
+ <para>The V4L picture controls are assumed to range from 0 to
+65535 with no particular reset value. The V4L2 API permits arbitrary
+limits and defaults which can be queried with the &VIDIOC-QUERYCTRL;
+ioctl. For general information about controls see <xref
+linkend="control" />.</para>
+
+ <para>The <structfield>depth</structfield> (average number of
+bits per pixel) of a video image is implied by the selected image
+format. V4L2 does not explicitly provide such information assuming
+applications recognizing the format are aware of the image depth and
+others need not know. The <structfield>palette</structfield> field
+moved into the &v4l2-pix-format;:<informaltable>
+ <tgroup cols="2">
+ <thead>
+ <row>
+ <entry>struct <structname>video_picture</structname>
+<structfield>palette</structfield></entry>
+ <entry>&v4l2-pix-format;
+<structfield>pixfmt</structfield></entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row>
+ <entry><constant>VIDEO_PALETTE_GREY</constant></entry>
+ <entry><para><link
+linkend="V4L2-PIX-FMT-GREY"><constant>V4L2_PIX_FMT_GREY</constant></link></para></entry>
+ </row>
+ <row>
+ <entry><constant>VIDEO_PALETTE_HI240</constant></entry>
+ <entry><para><link
+linkend="pixfmt-reserved"><constant>V4L2_PIX_FMT_HI240</constant></link><footnote>
+ <para>This is a custom format used by the BTTV
+driver, not one of the V4L2 standard formats.</para>
+ </footnote></para></entry>
+ </row>
+ <row>
+ <entry><constant>VIDEO_PALETTE_RGB565</constant></entry>
+ <entry><para><link
+linkend="pixfmt-rgb"><constant>V4L2_PIX_FMT_RGB565</constant></link></para></entry>
+ </row>
+ <row>
+ <entry><constant>VIDEO_PALETTE_RGB555</constant></entry>
+ <entry><para><link
+linkend="pixfmt-rgb"><constant>V4L2_PIX_FMT_RGB555</constant></link></para></entry>
+ </row>
+ <row>
+ <entry><constant>VIDEO_PALETTE_RGB24</constant></entry>
+ <entry><para><link
+linkend="pixfmt-rgb"><constant>V4L2_PIX_FMT_BGR24</constant></link></para></entry>
+ </row>
+ <row>
+ <entry><constant>VIDEO_PALETTE_RGB32</constant></entry>
+ <entry><para><link
+linkend="pixfmt-rgb"><constant>V4L2_PIX_FMT_BGR32</constant></link><footnote>
+ <para>Presumably all V4L RGB formats are
+little-endian, although some drivers might interpret them according to machine endianness. V4L2 defines little-endian, big-endian and red/blue
+swapped variants. For details see <xref linkend="pixfmt-rgb" />.</para>
+ </footnote></para></entry>
+ </row>
+ <row>
+ <entry><constant>VIDEO_PALETTE_YUV422</constant></entry>
+ <entry><para><link
+linkend="V4L2-PIX-FMT-YUYV"><constant>V4L2_PIX_FMT_YUYV</constant></link></para></entry>
+ </row>
+ <row>
+ <entry><para><constant>VIDEO_PALETTE_YUYV</constant><footnote>
+ <para><constant>VIDEO_PALETTE_YUV422</constant>
+and <constant>VIDEO_PALETTE_YUYV</constant> are the same formats. Some
+V4L drivers respond to one, some to the other.</para>
+ </footnote></para></entry>
+ <entry><para><link
+linkend="V4L2-PIX-FMT-YUYV"><constant>V4L2_PIX_FMT_YUYV</constant></link></para></entry>
+ </row>
+ <row>
+ <entry><constant>VIDEO_PALETTE_UYVY</constant></entry>
+ <entry><para><link
+linkend="V4L2-PIX-FMT-UYVY"><constant>V4L2_PIX_FMT_UYVY</constant></link></para></entry>
+ </row>
+ <row>
+ <entry><constant>VIDEO_PALETTE_YUV420</constant></entry>
+ <entry>None</entry>
+ </row>
+ <row>
+ <entry><constant>VIDEO_PALETTE_YUV411</constant></entry>
+ <entry><para><link
+linkend="V4L2-PIX-FMT-Y41P"><constant>V4L2_PIX_FMT_Y41P</constant></link><footnote>
+ <para>Not to be confused with
+<constant>V4L2_PIX_FMT_YUV411P</constant>, which is a planar
+format.</para> </footnote></para></entry>
+ </row>
+ <row>
+ <entry><constant>VIDEO_PALETTE_RAW</constant></entry>
+ <entry><para>None<footnote> <para>V4L explains this
+as: "RAW capture (BT848)"</para> </footnote></para></entry>
+ </row>
+ <row>
+ <entry><constant>VIDEO_PALETTE_YUV422P</constant></entry>
+ <entry><para><link
+linkend="V4L2-PIX-FMT-YUV422P"><constant>V4L2_PIX_FMT_YUV422P</constant></link></para></entry>
+ </row>
+ <row>
+ <entry><constant>VIDEO_PALETTE_YUV411P</constant></entry>
+ <entry><para><link
+linkend="V4L2-PIX-FMT-YUV411P"><constant>V4L2_PIX_FMT_YUV411P</constant></link><footnote>
+ <para>Not to be confused with
+<constant>V4L2_PIX_FMT_Y41P</constant>, which is a packed
+format.</para> </footnote></para></entry>
+ </row>
+ <row>
+ <entry><constant>VIDEO_PALETTE_YUV420P</constant></entry>
+ <entry><para><link
+linkend="V4L2-PIX-FMT-YVU420"><constant>V4L2_PIX_FMT_YVU420</constant></link></para></entry>
+ </row>
+ <row>
+ <entry><constant>VIDEO_PALETTE_YUV410P</constant></entry>
+ <entry><para><link
+linkend="V4L2-PIX-FMT-YVU410"><constant>V4L2_PIX_FMT_YVU410</constant></link></para></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable></para>
+
+ <para>V4L2 image formats are defined in <xref
+linkend="pixfmt" />. The image format can be selected with the
+&VIDIOC-S-FMT; ioctl.</para>
+ </section>
+
+ <section>
+ <title>Audio</title>
+
+ <para>The <constant>VIDIOCGAUDIO</constant> and
+<constant>VIDIOCSAUDIO</constant> ioctl and struct
+<structname>video_audio</structname> are used to enumerate the
+audio inputs of a V4L device. The equivalent V4L2 ioctls are
+&VIDIOC-G-AUDIO; and &VIDIOC-S-AUDIO; using &v4l2-audio; as
+discussed in <xref linkend="audio" />.</para>
+
+ <para>The <structfield>audio</structfield> "channel number"
+field counting audio inputs was renamed to
+<structfield>index</structfield>.</para>
+
+ <para>On <constant>VIDIOCSAUDIO</constant> the
+<structfield>mode</structfield> field selects <emphasis>one</emphasis>
+of the <constant>VIDEO_SOUND_MONO</constant>,
+<constant>VIDEO_SOUND_STEREO</constant>,
+<constant>VIDEO_SOUND_LANG1</constant> or
+<constant>VIDEO_SOUND_LANG2</constant> audio demodulation modes. When
+the current audio standard is BTSC
+<constant>VIDEO_SOUND_LANG2</constant> refers to SAP and
+<constant>VIDEO_SOUND_LANG1</constant> is meaningless. Also
+undocumented in the V4L specification, there is no way to query the
+selected mode. On <constant>VIDIOCGAUDIO</constant> the driver returns
+the <emphasis>actually received</emphasis> audio programmes in this
+field. In the V4L2 API this information is stored in the &v4l2-tuner;
+<structfield>rxsubchans</structfield> and
+<structfield>audmode</structfield> fields, respectively. See <xref
+linkend="tuner" /> for more information on tuners. Related to audio
+modes &v4l2-audio; also reports if this is a mono or stereo
+input, regardless if the source is a tuner.</para>
+
+ <para>The following fields where replaced by V4L2 controls
+accessible with the &VIDIOC-QUERYCTRL;, &VIDIOC-G-CTRL; and
+&VIDIOC-S-CTRL; ioctls:<informaltable>
+ <tgroup cols="2">
+ <thead>
+ <row>
+ <entry>struct
+<structname>video_audio</structname></entry>
+ <entry>V4L2 Control ID</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row>
+ <entry><structfield>volume</structfield></entry>
+ <entry><constant>V4L2_CID_AUDIO_VOLUME</constant></entry>
+ </row>
+ <row>
+ <entry><structfield>bass</structfield></entry>
+ <entry><constant>V4L2_CID_AUDIO_BASS</constant></entry>
+ </row>
+ <row>
+ <entry><structfield>treble</structfield></entry>
+ <entry><constant>V4L2_CID_AUDIO_TREBLE</constant></entry>
+ </row>
+ <row>
+ <entry><structfield>balance</structfield></entry>
+ <entry><constant>V4L2_CID_AUDIO_BALANCE</constant></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable></para>
+
+ <para>To determine which of these controls are supported by a
+driver V4L provides the <structfield>flags</structfield>
+<constant>VIDEO_AUDIO_VOLUME</constant>,
+<constant>VIDEO_AUDIO_BASS</constant>,
+<constant>VIDEO_AUDIO_TREBLE</constant> and
+<constant>VIDEO_AUDIO_BALANCE</constant>. In the V4L2 API the
+&VIDIOC-QUERYCTRL; ioctl reports if the respective control is
+supported. Accordingly the <constant>VIDEO_AUDIO_MUTABLE</constant>
+and <constant>VIDEO_AUDIO_MUTE</constant> flags where replaced by the
+boolean <constant>V4L2_CID_AUDIO_MUTE</constant> control.</para>
+
+ <para>All V4L2 controls have a <structfield>step</structfield>
+attribute replacing the struct <structname>video_audio</structname>
+<structfield>step</structfield> field. The V4L audio controls are
+assumed to range from 0 to 65535 with no particular reset value. The
+V4L2 API permits arbitrary limits and defaults which can be queried
+with the &VIDIOC-QUERYCTRL; ioctl. For general information about
+controls see <xref linkend="control" />.</para>
+ </section>
+
+ <section>
+ <title>Frame Buffer Overlay</title>
+
+ <para>The V4L2 ioctls equivalent to
+<constant>VIDIOCGFBUF</constant> and <constant>VIDIOCSFBUF</constant>
+are &VIDIOC-G-FBUF; and &VIDIOC-S-FBUF;. The
+<structfield>base</structfield> field of struct
+<structname>video_buffer</structname> remained unchanged, except V4L2
+defines a flag to indicate non-destructive overlays instead of a
+<constant>NULL</constant> pointer. All other fields moved into the
+&v4l2-pix-format; <structfield>fmt</structfield> substructure of
+&v4l2-framebuffer;. The <structfield>depth</structfield> field was
+replaced by <structfield>pixelformat</structfield>. See <xref
+ linkend="pixfmt-rgb" /> for a list of RGB formats and their
+respective color depths.</para>
+
+ <para>Instead of the special ioctls
+<constant>VIDIOCGWIN</constant> and <constant>VIDIOCSWIN</constant>
+V4L2 uses the general-purpose data format negotiation ioctls
+&VIDIOC-G-FMT; and &VIDIOC-S-FMT;. They take a pointer to a
+&v4l2-format; as argument. Here the <structfield>win</structfield>
+member of the <structfield>fmt</structfield> union is used, a
+&v4l2-window;.</para>
+
+ <para>The <structfield>x</structfield>,
+<structfield>y</structfield>, <structfield>width</structfield> and
+<structfield>height</structfield> fields of struct
+<structname>video_window</structname> moved into &v4l2-rect;
+substructure <structfield>w</structfield> of struct
+<structname>v4l2_window</structname>. The
+<structfield>chromakey</structfield>,
+<structfield>clips</structfield>, and
+<structfield>clipcount</structfield> fields remained unchanged. Struct
+<structname>video_clip</structname> was renamed to &v4l2-clip;, also
+containing a struct <structname>v4l2_rect</structname>, but the
+semantics are still the same.</para>
+
+ <para>The <constant>VIDEO_WINDOW_INTERLACE</constant> flag was
+dropped. Instead applications must set the
+<structfield>field</structfield> field to
+<constant>V4L2_FIELD_ANY</constant> or
+<constant>V4L2_FIELD_INTERLACED</constant>. The
+<constant>VIDEO_WINDOW_CHROMAKEY</constant> flag moved into
+&v4l2-framebuffer;, under the new name
+<constant>V4L2_FBUF_FLAG_CHROMAKEY</constant>.</para>
+
+ <para>In V4L, storing a bitmap pointer in
+<structfield>clips</structfield> and setting
+<structfield>clipcount</structfield> to
+<constant>VIDEO_CLIP_BITMAP</constant> (-1) requests bitmap
+clipping, using a fixed size bitmap of 1024 &times; 625 bits. Struct
+<structname>v4l2_window</structname> has a separate
+<structfield>bitmap</structfield> pointer field for this purpose and
+the bitmap size is determined by <structfield>w.width</structfield> and
+<structfield>w.height</structfield>.</para>
+
+ <para>The <constant>VIDIOCCAPTURE</constant> ioctl to enable or
+disable overlay was renamed to &VIDIOC-OVERLAY;.</para>
+ </section>
+
+ <section>
+ <title>Cropping</title>
+
+ <para>To capture only a subsection of the full picture V4L
+defines the <constant>VIDIOCGCAPTURE</constant> and
+<constant>VIDIOCSCAPTURE</constant> ioctls using struct
+<structname>video_capture</structname>. The equivalent V4L2 ioctls are
+&VIDIOC-G-CROP; and &VIDIOC-S-CROP; using &v4l2-crop;, and the related
+&VIDIOC-CROPCAP; ioctl. This is a rather complex matter, see
+<xref linkend="crop" /> for details.</para>
+
+ <para>The <structfield>x</structfield>,
+<structfield>y</structfield>, <structfield>width</structfield> and
+<structfield>height</structfield> fields moved into &v4l2-rect;
+substructure <structfield>c</structfield> of struct
+<structname>v4l2_crop</structname>. The
+<structfield>decimation</structfield> field was dropped. In the V4L2
+API the scaling factor is implied by the size of the cropping
+rectangle and the size of the captured or overlaid image.</para>
+
+ <para>The <constant>VIDEO_CAPTURE_ODD</constant>
+and <constant>VIDEO_CAPTURE_EVEN</constant> flags to capture only the
+odd or even field, respectively, were replaced by
+<constant>V4L2_FIELD_TOP</constant> and
+<constant>V4L2_FIELD_BOTTOM</constant> in the field named
+<structfield>field</structfield> of &v4l2-pix-format; and
+&v4l2-window;. These structures are used to select a capture or
+overlay format with the &VIDIOC-S-FMT; ioctl.</para>
+ </section>
+
+ <section>
+ <title>Reading Images, Memory Mapping</title>
+
+ <section>
+ <title>Capturing using the read method</title>
+
+ <para>There is no essential difference between reading images
+from a V4L or V4L2 device using the &func-read; function, however V4L2
+drivers are not required to support this I/O method. Applications can
+determine if the function is available with the &VIDIOC-QUERYCAP;
+ioctl. All V4L2 devices exchanging data with applications must support
+the &func-select; and &func-poll; functions.</para>
+
+ <para>To select an image format and size, V4L provides the
+<constant>VIDIOCSPICT</constant> and <constant>VIDIOCSWIN</constant>
+ioctls. V4L2 uses the general-purpose data format negotiation ioctls
+&VIDIOC-G-FMT; and &VIDIOC-S-FMT;. They take a pointer to a
+&v4l2-format; as argument, here the &v4l2-pix-format; named
+<structfield>pix</structfield> of its <structfield>fmt</structfield>
+union is used.</para>
+
+ <para>For more information about the V4L2 read interface see
+<xref linkend="rw" />.</para>
+ </section>
+ <section>
+ <title>Capturing using memory mapping</title>
+
+ <para>Applications can read from V4L devices by mapping
+buffers in device memory, or more often just buffers allocated in
+DMA-able system memory, into their address space. This avoids the data
+copying overhead of the read method. V4L2 supports memory mapping as
+well, with a few differences.</para>
+
+ <informaltable>
+ <tgroup cols="2">
+ <thead>
+ <row>
+ <entry>V4L</entry>
+ <entry>V4L2</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row>
+ <entry></entry>
+ <entry>The image format must be selected before
+buffers are allocated, with the &VIDIOC-S-FMT; ioctl. When no format
+is selected the driver may use the last, possibly by another
+application requested format.</entry>
+ </row>
+ <row>
+ <entry><para>Applications cannot change the number of
+buffers. The it is built into the driver, unless it has a module
+option to change the number when the driver module is
+loaded.</para></entry>
+ <entry><para>The &VIDIOC-REQBUFS; ioctl allocates the
+desired number of buffers, this is a required step in the initialization
+sequence.</para></entry>
+ </row>
+ <row>
+ <entry><para>Drivers map all buffers as one contiguous
+range of memory. The <constant>VIDIOCGMBUF</constant> ioctl is
+available to query the number of buffers, the offset of each buffer
+from the start of the virtual file, and the overall amount of memory
+used, which can be used as arguments for the &func-mmap;
+function.</para></entry>
+ <entry><para>Buffers are individually mapped. The
+offset and size of each buffer can be determined with the
+&VIDIOC-QUERYBUF; ioctl.</para></entry>
+ </row>
+ <row>
+ <entry><para>The <constant>VIDIOCMCAPTURE</constant>
+ioctl prepares a buffer for capturing. It also determines the image
+format for this buffer. The ioctl returns immediately, eventually with
+an &EAGAIN; if no video signal had been detected. When the driver
+supports more than one buffer applications can call the ioctl multiple
+times and thus have multiple outstanding capture
+requests.</para><para>The <constant>VIDIOCSYNC</constant> ioctl
+suspends execution until a particular buffer has been
+filled.</para></entry>
+ <entry><para>Drivers maintain an incoming and outgoing
+queue. &VIDIOC-QBUF; enqueues any empty buffer into the incoming
+queue. Filled buffers are dequeued from the outgoing queue with the
+&VIDIOC-DQBUF; ioctl. To wait until filled buffers become available this
+function, &func-select; or &func-poll; can be used. The
+&VIDIOC-STREAMON; ioctl must be called once after enqueuing one or
+more buffers to start capturing. Its counterpart
+&VIDIOC-STREAMOFF; stops capturing and dequeues all buffers from both
+queues. Applications can query the signal status, if known, with the
+&VIDIOC-ENUMINPUT; ioctl.</para></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+
+ <para>For a more in-depth discussion of memory mapping and
+examples, see <xref linkend="mmap" />.</para>
+ </section>
+ </section>
+
+ <section>
+ <title>Reading Raw VBI Data</title>
+
+ <para>Originally the V4L API did not specify a raw VBI capture
+interface, only the device file <filename>/dev/vbi</filename> was
+reserved for this purpose. The only driver supporting this interface
+was the BTTV driver, de-facto defining the V4L VBI interface. Reading
+from the device yields a raw VBI image with the following
+parameters:<informaltable>
+ <tgroup cols="2">
+ <thead>
+ <row>
+ <entry>&v4l2-vbi-format;</entry>
+ <entry>V4L, BTTV driver</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row>
+ <entry>sampling_rate</entry>
+ <entry>28636363&nbsp;Hz NTSC (or any other 525-line
+standard); 35468950&nbsp;Hz PAL and SECAM (625-line standards)</entry>
+ </row>
+ <row>
+ <entry>offset</entry>
+ <entry>?</entry>
+ </row>
+ <row>
+ <entry>samples_per_line</entry>
+ <entry>2048</entry>
+ </row>
+ <row>
+ <entry>sample_format</entry>
+ <entry>V4L2_PIX_FMT_GREY. The last four bytes (a
+machine endianness integer) contain a frame counter.</entry>
+ </row>
+ <row>
+ <entry>start[]</entry>
+ <entry>10, 273 NTSC; 22, 335 PAL and SECAM</entry>
+ </row>
+ <row>
+ <entry>count[]</entry>
+ <entry><para>16, 16<footnote><para>Old driver
+versions used different values, eventually the custom
+<constant>BTTV_VBISIZE</constant> ioctl was added to query the
+correct values.</para></footnote></para></entry>
+ </row>
+ <row>
+ <entry>flags</entry>
+ <entry>0</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable></para>
+
+ <para>Undocumented in the V4L specification, in Linux 2.3 the
+<constant>VIDIOCGVBIFMT</constant> and
+<constant>VIDIOCSVBIFMT</constant> ioctls using struct
+<structname>vbi_format</structname> were added to determine the VBI
+image parameters. These ioctls are only partially compatible with the
+V4L2 VBI interface specified in <xref linkend="raw-vbi" />.</para>
+
+ <para>An <structfield>offset</structfield> field does not
+exist, <structfield>sample_format</structfield> is supposed to be
+<constant>VIDEO_PALETTE_RAW</constant>, equivalent to
+<constant>V4L2_PIX_FMT_GREY</constant>. The remaining fields are
+probably equivalent to &v4l2-vbi-format;.</para>
+
+ <para>Apparently only the Zoran (ZR 36120) driver implements
+these ioctls. The semantics differ from those specified for V4L2 in two
+ways. The parameters are reset on &func-open; and
+<constant>VIDIOCSVBIFMT</constant> always returns an &EINVAL; if the
+parameters are invalid.</para>
+ </section>
+
+ <section>
+ <title>Miscellaneous</title>
+
+ <para>V4L2 has no equivalent of the
+<constant>VIDIOCGUNIT</constant> ioctl. Applications can find the VBI
+device associated with a video capture device (or vice versa) by
+reopening the device and requesting VBI data. For details see
+<xref linkend="open" />.</para>
+
+ <para>No replacement exists for <constant>VIDIOCKEY</constant>,
+and the V4L functions for microcode programming. A new interface for
+MPEG compression and playback devices is documented in <xref
+ linkend="extended-controls" />.</para>
+ </section>
+
+ </section>
+
+ <section id="hist-v4l2">
+ <title>Changes of the V4L2 API</title>
+
+ <para>Soon after the V4L API was added to the kernel it was
+criticised as too inflexible. In August 1998 Bill Dirks proposed a
+number of improvements and began to work on documentation, example
+drivers and applications. With the help of other volunteers this
+eventually became the V4L2 API, not just an extension but a
+replacement for the V4L API. However it took another four years and
+two stable kernel releases until the new API was finally accepted for
+inclusion into the kernel in its present form.</para>
+
+ <section>
+ <title>Early Versions</title>
+ <para>1998-08-20: First version.</para>
+
+ <para>1998-08-27: The &func-select; function was introduced.</para>
+
+ <para>1998-09-10: New video standard interface.</para>
+
+ <para>1998-09-18: The <constant>VIDIOC_NONCAP</constant> ioctl
+was replaced by the otherwise meaningless <constant>O_TRUNC</constant>
+&func-open; flag, and the aliases <constant>O_NONCAP</constant> and
+<constant>O_NOIO</constant> were defined. Applications can set this
+flag if they intend to access controls only, as opposed to capture
+applications which need exclusive access. The
+<constant>VIDEO_STD_XXX</constant> identifiers are now ordinals
+instead of flags, and the <function>video_std_construct()</function>
+helper function takes id and transmission arguments.</para>
+
+ <para>1998-09-28: Revamped video standard. Made video controls
+individually enumerable.</para>
+
+ <para>1998-10-02: The <structfield>id</structfield> field was
+removed from struct <structname>video_standard</structname> and the
+color subcarrier fields were renamed. The &VIDIOC-QUERYSTD; ioctl was
+renamed to &VIDIOC-ENUMSTD;, &VIDIOC-G-INPUT; to &VIDIOC-ENUMINPUT;. A
+first draft of the Codec API was released.</para>
+
+ <para>1998-11-08: Many minor changes. Most symbols have been
+renamed. Some material changes to &v4l2-capability;.</para>
+
+ <para>1998-11-12: The read/write directon of some ioctls was misdefined.</para>
+
+ <para>1998-11-14: <constant>V4L2_PIX_FMT_RGB24</constant>
+changed to <constant>V4L2_PIX_FMT_BGR24</constant>, and
+<constant>V4L2_PIX_FMT_RGB32</constant> changed to
+<constant>V4L2_PIX_FMT_BGR32</constant>. Audio controls are now
+accessible with the &VIDIOC-G-CTRL; and &VIDIOC-S-CTRL; ioctls under
+names starting with <constant>V4L2_CID_AUDIO</constant>. The
+<constant>V4L2_MAJOR</constant> define was removed from
+<filename>videodev.h</filename> since it was only used once in the
+<filename>videodev</filename> kernel module. The
+<constant>YUV422</constant> and <constant>YUV411</constant> planar
+image formats were added.</para>
+
+ <para>1998-11-28: A few ioctl symbols changed. Interfaces for codecs and
+video output devices were added.</para>
+
+ <para>1999-01-14: A raw VBI capture interface was added.</para>
+
+ <para>1999-01-19: The <constant>VIDIOC_NEXTBUF</constant> ioctl
+ was removed.</para>
+ </section>
+
+ <section>
+ <title>V4L2 Version 0.16 1999-01-31</title>
+ <para>1999-01-27: There is now one QBUF ioctl, VIDIOC_QWBUF and VIDIOC_QRBUF
+are gone. VIDIOC_QBUF takes a v4l2_buffer as a parameter. Added
+digital zoom (cropping) controls.</para>
+ </section>
+
+ <!-- Where's 0.17? mhs couldn't find that videodev.h, perhaps Bill
+ forgot to bump the version number or never released it. -->
+
+ <section>
+ <title>V4L2 Version 0.18 1999-03-16</title>
+ <para>Added a v4l to V4L2 ioctl compatibility layer to
+videodev.c. Driver writers, this changes how you implement your ioctl
+handler. See the Driver Writer's Guide. Added some more control id
+codes.</para>
+ </section>
+
+ <section>
+ <title>V4L2 Version 0.19 1999-06-05</title>
+ <para>1999-03-18: Fill in the category and catname fields of
+v4l2_queryctrl objects before passing them to the driver. Required a
+minor change to the VIDIOC_QUERYCTRL handlers in the sample
+drivers.</para>
+ <para>1999-03-31: Better compatibility for v4l memory capture
+ioctls. Requires changes to drivers to fully support new compatibility
+features, see Driver Writer's Guide and v4l2cap.c. Added new control
+IDs: V4L2_CID_HFLIP, _VFLIP. Changed V4L2_PIX_FMT_YUV422P to _YUV422P,
+and _YUV411P to _YUV411P.</para>
+ <para>1999-04-04: Added a few more control IDs.</para>
+ <para>1999-04-07: Added the button control type.</para>
+ <para>1999-05-02: Fixed a typo in videodev.h, and added the
+V4L2_CTRL_FLAG_GRAYED (later V4L2_CTRL_FLAG_GRABBED) flag.</para>
+ <para>1999-05-20: Definition of VIDIOC_G_CTRL was wrong causing
+a malfunction of this ioctl.</para>
+ <para>1999-06-05: Changed the value of
+V4L2_CID_WHITENESS.</para>
+ </section>
+
+ <section>
+ <title>V4L2 Version 0.20 (1999-09-10)</title>
+
+ <para>Version 0.20 introduced a number of changes which were
+<emphasis>not backward compatible</emphasis> with 0.19 and earlier
+versions. Purpose of these changes was to simplify the API, while
+making it more extensible and following common Linux driver API
+conventions.</para>
+
+ <orderedlist>
+ <listitem>
+ <para>Some typos in <constant>V4L2_FMT_FLAG</constant>
+symbols were fixed. &v4l2-clip; was changed for compatibility with
+v4l. (1999-08-30)</para>
+ </listitem>
+
+ <listitem>
+ <para><constant>V4L2_TUNER_SUB_LANG1</constant> was added.
+(1999-09-05)</para>
+ </listitem>
+
+ <listitem>
+ <para>All ioctl() commands that used an integer argument now
+take a pointer to an integer. Where it makes sense, ioctls will return
+the actual new value in the integer pointed to by the argument, a
+common convention in the V4L2 API. The affected ioctls are:
+VIDIOC_PREVIEW, VIDIOC_STREAMON, VIDIOC_STREAMOFF, VIDIOC_S_FREQ,
+VIDIOC_S_INPUT, VIDIOC_S_OUTPUT, VIDIOC_S_EFFECT. For example
+<programlisting>
+err = ioctl (fd, VIDIOC_XXX, V4L2_XXX);
+</programlisting> becomes <programlisting>
+int a = V4L2_XXX; err = ioctl(fd, VIDIOC_XXX, &amp;a);
+</programlisting>
+ </para>
+ </listitem>
+
+ <listitem>
+ <para>All the different get- and set-format commands were
+swept into one &VIDIOC-G-FMT; and &VIDIOC-S-FMT; ioctl taking a union
+and a type field selecting the union member as parameter. Purpose is to
+simplify the API by eliminating several ioctls and to allow new and
+driver private data streams without adding new ioctls.</para>
+
+ <para>This change obsoletes the following ioctls:
+<constant>VIDIOC_S_INFMT</constant>,
+<constant>VIDIOC_G_INFMT</constant>,
+<constant>VIDIOC_S_OUTFMT</constant>,
+<constant>VIDIOC_G_OUTFMT</constant>,
+<constant>VIDIOC_S_VBIFMT</constant> and
+<constant>VIDIOC_G_VBIFMT</constant>. The image format structure
+<structname>v4l2_format</structname> was renamed to &v4l2-pix-format;,
+while &v4l2-format; is now the envelopping structure for all format
+negotiations.</para>
+ </listitem>
+
+ <listitem>
+ <para>Similar to the changes above, the
+<constant>VIDIOC_G_PARM</constant> and
+<constant>VIDIOC_S_PARM</constant> ioctls were merged with
+<constant>VIDIOC_G_OUTPARM</constant> and
+<constant>VIDIOC_S_OUTPARM</constant>. A
+<structfield>type</structfield> field in the new &v4l2-streamparm;
+selects the respective union member.</para>
+
+ <para>This change obsoletes the
+<constant>VIDIOC_G_OUTPARM</constant> and
+<constant>VIDIOC_S_OUTPARM</constant> ioctls.</para>
+ </listitem>
+
+ <listitem>
+ <para>Control enumeration was simplified, and two new
+control flags were introduced and one dropped. The
+<structfield>catname</structfield> field was replaced by a
+<structfield>group</structfield> field.</para>
+
+ <para>Drivers can now flag unsupported and temporarily
+unavailable controls with <constant>V4L2_CTRL_FLAG_DISABLED</constant>
+and <constant>V4L2_CTRL_FLAG_GRABBED</constant> respectively. The
+<structfield>group</structfield> name indicates a possibly narrower
+classification than the <structfield>category</structfield>. In other
+words, there may be multiple groups within a category. Controls within
+a group would typically be drawn within a group box. Controls in
+different categories might have a greater separation, or may even
+appear in separate windows.</para>
+ </listitem>
+
+ <listitem>
+ <para>The &v4l2-buffer; <structfield>timestamp</structfield>
+was changed to a 64 bit integer, containing the sampling or output
+time of the frame in nanoseconds. Additionally timestamps will be in
+absolute system time, not starting from zero at the beginning of a
+stream. The data type name for timestamps is stamp_t, defined as a
+signed 64-bit integer. Output devices should not send a buffer out
+until the time in the timestamp field has arrived. I would like to
+follow SGI's lead, and adopt a multimedia timestamping system like
+their UST (Unadjusted System Time). See
+http://web.archive.org/web/*/http://reality.sgi.com
+/cpirazzi_engr/lg/time/intro.html.
+UST uses timestamps that are 64-bit signed integers
+(not struct timeval's) and given in nanosecond units. The UST clock
+starts at zero when the system is booted and runs continuously and
+uniformly. It takes a little over 292 years for UST to overflow. There
+is no way to set the UST clock. The regular Linux time-of-day clock
+can be changed periodically, which would cause errors if it were being
+used for timestamping a multimedia stream. A real UST style clock will
+require some support in the kernel that is not there yet. But in
+anticipation, I will change the timestamp field to a 64-bit integer,
+and I will change the v4l2_masterclock_gettime() function (used only
+by drivers) to return a 64-bit integer.</para>
+ </listitem>
+
+ <listitem>
+ <para>A <structfield>sequence</structfield> field was added
+to &v4l2-buffer;. The <structfield>sequence</structfield> field counts
+captured frames, it is ignored by output devices. When a capture
+driver drops a frame, the sequence number of that frame is
+skipped.</para>
+ </listitem>
+ </orderedlist>
+ </section>
+
+ <section>
+ <title>V4L2 Version 0.20 incremental changes</title>
+ <!-- Version number didn't change anymore, reason unknown. -->
+
+ <para>1999-12-23: In &v4l2-vbi-format; the
+<structfield>reserved1</structfield> field became
+<structfield>offset</structfield>. Previously drivers were required to
+clear the <structfield>reserved1</structfield> field.</para>
+
+ <para>2000-01-13: The
+ <constant>V4L2_FMT_FLAG_NOT_INTERLACED</constant> flag was added.</para>
+
+ <para>2000-07-31: The <filename>linux/poll.h</filename> header
+is now included by <filename>videodev.h</filename> for compatibility
+with the original <filename>videodev.h</filename> file.</para>
+
+ <para>2000-11-20: <constant>V4L2_TYPE_VBI_OUTPUT</constant> and
+<constant>V4L2_PIX_FMT_Y41P</constant> were added.</para>
+
+ <para>2000-11-25: <constant>V4L2_TYPE_VBI_INPUT</constant> was
+added.</para>
+
+ <para>2000-12-04: A couple typos in symbol names were fixed.</para>
+
+ <para>2001-01-18: To avoid namespace conflicts the
+<constant>fourcc</constant> macro defined in the
+<filename>videodev.h</filename> header file was renamed to
+<constant>v4l2_fourcc</constant>.</para>
+
+ <para>2001-01-25: A possible driver-level compatibility problem
+between the <filename>videodev.h</filename> file in Linux 2.4.0 and
+the <filename>videodev.h</filename> file included in the
+<filename>videodevX</filename> patch was fixed. Users of an earlier
+version of <filename>videodevX</filename> on Linux 2.4.0 should
+recompile their V4L and V4L2 drivers.</para>
+
+ <para>2001-01-26: A possible kernel-level incompatibility
+between the <filename>videodev.h</filename> file in the
+<filename>videodevX</filename> patch and the
+<filename>videodev.h</filename> file in Linux 2.2.x with devfs patches
+applied was fixed.</para>
+
+ <para>2001-03-02: Certain V4L ioctls which pass data in both
+direction although they are defined with read-only parameter, did not
+work correctly through the backward compatibility layer.
+[Solution?]</para>
+
+ <para>2001-04-13: Big endian 16-bit RGB formats were added.</para>
+
+ <para>2001-09-17: New YUV formats and the &VIDIOC-G-FREQUENCY; and
+&VIDIOC-S-FREQUENCY; ioctls were added. (The old
+<constant>VIDIOC_G_FREQ</constant> and
+<constant>VIDIOC_S_FREQ</constant> ioctls did not take multiple tuners
+into account.)</para>
+
+ <para>2000-09-18: <constant>V4L2_BUF_TYPE_VBI</constant> was
+added. This may <emphasis>break compatibility</emphasis> as the
+&VIDIOC-G-FMT; and &VIDIOC-S-FMT; ioctls may fail now if the struct
+<structname>v4l2_fmt</structname> <structfield>type</structfield>
+field does not contain <constant>V4L2_BUF_TYPE_VBI</constant>. In the
+documentation of the &v4l2-vbi-format;
+<structfield>offset</structfield> field the ambiguous phrase "rising
+edge" was changed to "leading edge".</para>
+ </section>
+
+ <section>
+ <title>V4L2 Version 0.20 2000-11-23</title>
+
+ <para>A number of changes were made to the raw VBI
+interface.</para>
+
+ <orderedlist>
+ <listitem>
+ <para>Figures clarifying the line numbering scheme were
+added to the V4L2 API specification. The
+<structfield>start</structfield>[0] and
+<structfield>start</structfield>[1] fields no longer count line
+numbers beginning at zero. Rationale: a) The previous definition was
+unclear. b) The <structfield>start</structfield>[] values are ordinal
+numbers. c) There is no point in inventing a new line numbering
+scheme. We now use line number as defined by ITU-R, period.
+Compatibility: Add one to the start values. Applications depending on
+the previous semantics may not function correctly.</para>
+ </listitem>
+
+ <listitem>
+ <para>The restriction "count[0] &gt; 0 and count[1] &gt; 0"
+has been relaxed to "(count[0] + count[1]) &gt; 0". Rationale:
+Drivers may allocate resources at scan line granularity and some data
+services are transmitted only on the first field. The comment that
+both <structfield>count</structfield> values will usually be equal is
+misleading and pointless and has been removed. This change
+<emphasis>breaks compatibility</emphasis> with earlier versions:
+Drivers may return EINVAL, applications may not function
+correctly.</para>
+ </listitem>
+
+ <listitem>
+ <para>Drivers are again permitted to return negative
+(unknown) start values as proposed earlier. Why this feature was
+dropped is unclear. This change may <emphasis>break
+compatibility</emphasis> with applications depending on the start
+values being positive. The use of <constant>EBUSY</constant> and
+<constant>EINVAL</constant> error codes with the &VIDIOC-S-FMT; ioctl
+was clarified. The &EBUSY; was finally documented, and the
+<structfield>reserved2</structfield> field which was previously
+mentioned only in the <filename>videodev.h</filename> header
+file.</para>
+ </listitem>
+
+ <listitem>
+ <para>New buffer types
+<constant>V4L2_TYPE_VBI_INPUT</constant> and
+<constant>V4L2_TYPE_VBI_OUTPUT</constant> were added. The former is an
+alias for the old <constant>V4L2_TYPE_VBI</constant>, the latter was
+missing in the <filename>videodev.h</filename> file.</para>
+ </listitem>
+ </orderedlist>
+ </section>
+
+ <section>
+ <title>V4L2 Version 0.20 2002-07-25</title>
+ <para>Added sliced VBI interface proposal.</para>
+ </section>
+
+ <section>
+ <title>V4L2 in Linux 2.5.46, 2002-10</title>
+
+ <para>Around October-November 2002, prior to an announced
+feature freeze of Linux 2.5, the API was revised, drawing from
+experience with V4L2 0.20. This unnamed version was finally merged
+into Linux 2.5.46.</para>
+
+ <orderedlist>
+ <listitem>
+ <para>As specified in <xref linkend="related" />, drivers
+must make related device functions available under all minor device
+numbers.</para>
+ </listitem>
+
+ <listitem>
+ <para>The &func-open; function requires access mode
+<constant>O_RDWR</constant> regardless of the device type. All V4L2
+drivers exchanging data with applications must support the
+<constant>O_NONBLOCK</constant> flag. The <constant>O_NOIO</constant>
+flag, a V4L2 symbol which aliased the meaningless
+<constant>O_TRUNC</constant> to indicate accesses without data
+exchange (panel applications) was dropped. Drivers must stay in "panel
+mode" until the application attempts to initiate a data exchange, see
+<xref linkend="open" />.</para>
+ </listitem>
+
+ <listitem>
+ <para>The &v4l2-capability; changed dramatically. Note that
+also the size of the structure changed, which is encoded in the ioctl
+request code, thus older V4L2 devices will respond with an &EINVAL; to
+the new &VIDIOC-QUERYCAP; ioctl.</para>
+
+ <para>There are new fields to identify the driver, a new RDS
+device function <constant>V4L2_CAP_RDS_CAPTURE</constant>, the
+<constant>V4L2_CAP_AUDIO</constant> flag indicates if the device has
+any audio connectors, another I/O capability
+<constant>V4L2_CAP_ASYNCIO</constant> can be flagged. In response to
+these changes the <structfield>type</structfield> field became a bit
+set and was merged into the <structfield>flags</structfield> field.
+<constant>V4L2_FLAG_TUNER</constant> was renamed to
+<constant>V4L2_CAP_TUNER</constant>,
+<constant>V4L2_CAP_VIDEO_OVERLAY</constant> replaced
+<constant>V4L2_FLAG_PREVIEW</constant> and
+<constant>V4L2_CAP_VBI_CAPTURE</constant> and
+<constant>V4L2_CAP_VBI_OUTPUT</constant> replaced
+<constant>V4L2_FLAG_DATA_SERVICE</constant>.
+<constant>V4L2_FLAG_READ</constant> and
+<constant>V4L2_FLAG_WRITE</constant> were merged into
+<constant>V4L2_CAP_READWRITE</constant>.</para>
+
+ <para>The redundant fields
+<structfield>inputs</structfield>, <structfield>outputs</structfield>
+and <structfield>audios</structfield> were removed. These properties
+can be determined as described in <xref linkend="video" /> and <xref
+linkend="audio" />.</para>
+
+ <para>The somewhat volatile and therefore barely useful
+fields <structfield>maxwidth</structfield>,
+<structfield>maxheight</structfield>,
+<structfield>minwidth</structfield>,
+<structfield>minheight</structfield>,
+<structfield>maxframerate</structfield> were removed. This information
+is available as described in <xref linkend="format" /> and
+<xref linkend="standard" />.</para>
+
+ <para><constant>V4L2_FLAG_SELECT</constant> was removed. We
+believe the select() function is important enough to require support
+of it in all V4L2 drivers exchanging data with applications. The
+redundant <constant>V4L2_FLAG_MONOCHROME</constant> flag was removed,
+this information is available as described in <xref
+ linkend="format" />.</para>
+ </listitem>
+
+ <listitem>
+ <para>In &v4l2-input; the
+<structfield>assoc_audio</structfield> field and the
+<structfield>capability</structfield> field and its only flag
+<constant>V4L2_INPUT_CAP_AUDIO</constant> was replaced by the new
+<structfield>audioset</structfield> field. Instead of linking one
+video input to one audio input this field reports all audio inputs
+this video input combines with.</para>
+
+ <para>New fields are <structfield>tuner</structfield>
+(reversing the former link from tuners to video inputs),
+<structfield>std</structfield> and
+<structfield>status</structfield>.</para>
+
+ <para>Accordingly &v4l2-output; lost its
+<structfield>capability</structfield> and
+<structfield>assoc_audio</structfield> fields.
+<structfield>audioset</structfield>,
+<structfield>modulator</structfield> and
+<structfield>std</structfield> where added instead.</para>
+ </listitem>
+
+ <listitem>
+ <para>The &v4l2-audio; field
+<structfield>audio</structfield> was renamed to
+<structfield>index</structfield>, for consistency with other
+structures. A new capability flag
+<constant>V4L2_AUDCAP_STEREO</constant> was added to indicated if the
+audio input in question supports stereo sound.
+<constant>V4L2_AUDCAP_EFFECTS</constant> and the corresponding
+<constant>V4L2_AUDMODE</constant> flags where removed. This can be
+easily implemented using controls. (However the same applies to AVL
+which is still there.)</para>
+
+ <para>Again for consistency the &v4l2-audioout; field
+<structfield>audio</structfield> was renamed to
+<structfield>index</structfield>.</para>
+ </listitem>
+
+ <listitem>
+ <para>The &v4l2-tuner;
+<structfield>input</structfield> field was replaced by an
+<structfield>index</structfield> field, permitting devices with
+multiple tuners. The link between video inputs and tuners is now
+reversed, inputs point to their tuner. The
+<structfield>std</structfield> substructure became a
+simple set (more about this below) and moved into &v4l2-input;. A
+<structfield>type</structfield> field was added.</para>
+
+ <para>Accordingly in &v4l2-modulator; the
+<structfield>output</structfield> was replaced by an
+<structfield>index</structfield> field.</para>
+
+ <para>In &v4l2-frequency; the
+<structfield>port</structfield> field was replaced by a
+<structfield>tuner</structfield> field containing the respective tuner
+or modulator index number. A tuner <structfield>type</structfield>
+field was added and the <structfield>reserved</structfield> field
+became larger for future extensions (satellite tuners in
+particular).</para>
+ </listitem>
+
+ <listitem>
+ <para>The idea of completely transparent video standards was
+dropped. Experience showed that applications must be able to work with
+video standards beyond presenting the user a menu. Instead of
+enumerating supported standards with an ioctl applications can now
+refer to standards by &v4l2-std-id; and symbols defined in the
+<filename>videodev2.h</filename> header file. For details see <xref
+ linkend="standard" />. The &VIDIOC-G-STD; and
+&VIDIOC-S-STD; now take a pointer to this type as argument.
+&VIDIOC-QUERYSTD; was added to autodetect the received standard, if
+the hardware has this capability. In &v4l2-standard; an
+<structfield>index</structfield> field was added for &VIDIOC-ENUMSTD;.
+A &v4l2-std-id; field named <structfield>id</structfield> was added as
+machine readable identifier, also replacing the
+<structfield>transmission</structfield> field. The misleading
+<structfield>framerate</structfield> field was renamed
+to <structfield>frameperiod</structfield>. The now obsolete
+<structfield>colorstandard</structfield> information, originally
+needed to distguish between variations of standards, were
+removed.</para>
+
+ <para>Struct <structname>v4l2_enumstd</structname> ceased to
+be. &VIDIOC-ENUMSTD; now takes a pointer to a &v4l2-standard;
+directly. The information which standards are supported by a
+particular video input or output moved into &v4l2-input; and
+&v4l2-output; fields named <structfield>std</structfield>,
+respectively.</para>
+ </listitem>
+
+ <listitem>
+ <para>The &v4l2-queryctrl; fields
+<structfield>category</structfield> and
+<structfield>group</structfield> did not catch on and/or were not
+implemented as expected and therefore removed.</para>
+ </listitem>
+
+ <listitem>
+ <para>The &VIDIOC-TRY-FMT; ioctl was added to negotiate data
+formats as with &VIDIOC-S-FMT;, but without the overhead of
+programming the hardware and regardless of I/O in progress.</para>
+
+ <para>In &v4l2-format; the <structfield>fmt</structfield>
+union was extended to contain &v4l2-window;. All image format
+negotiations are now possible with <constant>VIDIOC_G_FMT</constant>,
+<constant>VIDIOC_S_FMT</constant> and
+<constant>VIDIOC_TRY_FMT</constant>; ioctl. The
+<constant>VIDIOC_G_WIN</constant> and
+<constant>VIDIOC_S_WIN</constant> ioctls to prepare for a video
+overlay were removed. The <structfield>type</structfield> field
+changed to type &v4l2-buf-type; and the buffer type names changed as
+follows.<informaltable>
+ <tgroup cols="2">
+ <thead>
+ <row>
+ <entry>Old defines</entry>
+ <entry>&v4l2-buf-type;</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_BUF_TYPE_CAPTURE</constant></entry>
+ <entry><constant>V4L2_BUF_TYPE_VIDEO_CAPTURE</constant></entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_BUF_TYPE_CODECIN</constant></entry>
+ <entry>Omitted for now</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_BUF_TYPE_CODECOUT</constant></entry>
+ <entry>Omitted for now</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_BUF_TYPE_EFFECTSIN</constant></entry>
+ <entry>Omitted for now</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_BUF_TYPE_EFFECTSIN2</constant></entry>
+ <entry>Omitted for now</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_BUF_TYPE_EFFECTSOUT</constant></entry>
+ <entry>Omitted for now</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_BUF_TYPE_VIDEOOUT</constant></entry>
+ <entry><constant>V4L2_BUF_TYPE_VIDEO_OUTPUT</constant></entry>
+ </row>
+ <row>
+ <entry><constant>-</constant></entry>
+ <entry><constant>V4L2_BUF_TYPE_VIDEO_OVERLAY</constant></entry>
+ </row>
+ <row>
+ <entry><constant>-</constant></entry>
+ <entry><constant>V4L2_BUF_TYPE_VBI_CAPTURE</constant></entry>
+ </row>
+ <row>
+ <entry><constant>-</constant></entry>
+ <entry><constant>V4L2_BUF_TYPE_VBI_OUTPUT</constant></entry>
+ </row>
+ <row>
+ <entry><constant>-</constant></entry>
+ <entry><constant>V4L2_BUF_TYPE_SLICED_VBI_CAPTURE</constant></entry>
+ </row>
+ <row>
+ <entry><constant>-</constant></entry>
+ <entry><constant>V4L2_BUF_TYPE_SLICED_VBI_OUTPUT</constant></entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_BUF_TYPE_PRIVATE_BASE</constant></entry>
+ <entry><constant>V4L2_BUF_TYPE_PRIVATE</constant> (but this is deprecated)</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable></para>
+ </listitem>
+
+ <listitem>
+ <para>In &v4l2-fmtdesc; a &v4l2-buf-type; field named
+<structfield>type</structfield> was added as in &v4l2-format;. The
+<constant>VIDIOC_ENUM_FBUFFMT</constant> ioctl is no longer needed and
+was removed. These calls can be replaced by &VIDIOC-ENUM-FMT; with
+type <constant>V4L2_BUF_TYPE_VIDEO_OVERLAY</constant>.</para>
+ </listitem>
+
+ <listitem>
+ <para>In &v4l2-pix-format; the
+<structfield>depth</structfield> field was removed, assuming
+applications which recognize the format by its four-character-code
+already know the color depth, and others do not care about it. The
+same rationale lead to the removal of the
+<constant>V4L2_FMT_FLAG_COMPRESSED</constant> flag. The
+<constant>V4L2_FMT_FLAG_SWCONVECOMPRESSED</constant> flag was removed
+because drivers are not supposed to convert images in kernel space. A
+user library of conversion functions should be provided instead. The
+<constant>V4L2_FMT_FLAG_BYTESPERLINE</constant> flag was redundant.
+Applications can set the <structfield>bytesperline</structfield> field
+to zero to get a reasonable default. Since the remaining flags were
+replaced as well, the <structfield>flags</structfield> field itself
+was removed.</para>
+ <para>The interlace flags were replaced by a &v4l2-field;
+value in a newly added <structfield>field</structfield>
+field.<informaltable>
+ <tgroup cols="2">
+ <thead>
+ <row>
+ <entry>Old flag</entry>
+ <entry>&v4l2-field;</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_FMT_FLAG_NOT_INTERLACED</constant></entry>
+ <entry>?</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_FMT_FLAG_INTERLACED</constant>
+= <constant>V4L2_FMT_FLAG_COMBINED</constant></entry>
+ <entry><constant>V4L2_FIELD_INTERLACED</constant></entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_FMT_FLAG_TOPFIELD</constant>
+= <constant>V4L2_FMT_FLAG_ODDFIELD</constant></entry>
+ <entry><constant>V4L2_FIELD_TOP</constant></entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_FMT_FLAG_BOTFIELD</constant>
+= <constant>V4L2_FMT_FLAG_EVENFIELD</constant></entry>
+ <entry><constant>V4L2_FIELD_BOTTOM</constant></entry>
+ </row>
+ <row>
+ <entry><constant>-</constant></entry>
+ <entry><constant>V4L2_FIELD_SEQ_TB</constant></entry>
+ </row>
+ <row>
+ <entry><constant>-</constant></entry>
+ <entry><constant>V4L2_FIELD_SEQ_BT</constant></entry>
+ </row>
+ <row>
+ <entry><constant>-</constant></entry>
+ <entry><constant>V4L2_FIELD_ALTERNATE</constant></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable></para>
+
+ <para>The color space flags were replaced by a
+&v4l2-colorspace; value in a newly added
+<structfield>colorspace</structfield> field, where one of
+<constant>V4L2_COLORSPACE_SMPTE170M</constant>,
+<constant>V4L2_COLORSPACE_BT878</constant>,
+<constant>V4L2_COLORSPACE_470_SYSTEM_M</constant> or
+<constant>V4L2_COLORSPACE_470_SYSTEM_BG</constant> replaces
+<constant>V4L2_FMT_CS_601YUV</constant>.</para>
+ </listitem>
+
+ <listitem>
+ <para>In &v4l2-requestbuffers; the
+<structfield>type</structfield> field was properly defined as
+&v4l2-buf-type;. Buffer types changed as mentioned above. A new
+<structfield>memory</structfield> field of type &v4l2-memory; was
+added to distinguish between I/O methods using buffers allocated
+by the driver or the application. See <xref linkend="io" /> for
+details.</para>
+ </listitem>
+
+ <listitem>
+ <para>In &v4l2-buffer; the <structfield>type</structfield>
+field was properly defined as &v4l2-buf-type;. Buffer types changed as
+mentioned above. A <structfield>field</structfield> field of type
+&v4l2-field; was added to indicate if a buffer contains a top or
+bottom field. The old field flags were removed. Since no unadjusted
+system time clock was added to the kernel as planned, the
+<structfield>timestamp</structfield> field changed back from type
+stamp_t, an unsigned 64 bit integer expressing the sample time in
+nanoseconds, to struct <structname>timeval</structname>. With the
+addition of a second memory mapping method the
+<structfield>offset</structfield> field moved into union
+<structfield>m</structfield>, and a new
+<structfield>memory</structfield> field of type &v4l2-memory; was
+added to distinguish between I/O methods. See <xref linkend="io" />
+for details.</para>
+
+ <para>The <constant>V4L2_BUF_REQ_CONTIG</constant>
+flag was used by the V4L compatibility layer, after changes to this
+code it was no longer needed. The
+<constant>V4L2_BUF_ATTR_DEVICEMEM</constant> flag would indicate if
+the buffer was indeed allocated in device memory rather than DMA-able
+system memory. It was barely useful and so was removed.</para>
+ </listitem>
+
+ <listitem>
+ <para>In &v4l2-framebuffer; the
+<structfield>base[3]</structfield> array anticipating double- and
+triple-buffering in off-screen video memory, however without defining
+a synchronization mechanism, was replaced by a single pointer. The
+<constant>V4L2_FBUF_CAP_SCALEUP</constant> and
+<constant>V4L2_FBUF_CAP_SCALEDOWN</constant> flags were removed.
+Applications can determine this capability more accurately using the
+new cropping and scaling interface. The
+<constant>V4L2_FBUF_CAP_CLIPPING</constant> flag was replaced by
+<constant>V4L2_FBUF_CAP_LIST_CLIPPING</constant> and
+<constant>V4L2_FBUF_CAP_BITMAP_CLIPPING</constant>.</para>
+ </listitem>
+
+ <listitem>
+ <para>In &v4l2-clip; the <structfield>x</structfield>,
+<structfield>y</structfield>, <structfield>width</structfield> and
+<structfield>height</structfield> field moved into a
+<structfield>c</structfield> substructure of type &v4l2-rect;. The
+<structfield>x</structfield> and <structfield>y</structfield> fields
+were renamed to <structfield>left</structfield> and
+<structfield>top</structfield>, &ie; offsets to a context dependent
+origin.</para>
+ </listitem>
+
+ <listitem>
+ <para>In &v4l2-window; the <structfield>x</structfield>,
+<structfield>y</structfield>, <structfield>width</structfield> and
+<structfield>height</structfield> field moved into a
+<structfield>w</structfield> substructure as above. A
+<structfield>field</structfield> field of type %v4l2-field; was added
+to distinguish between field and frame (interlaced) overlay.</para>
+ </listitem>
+
+ <listitem>
+ <para>The digital zoom interface, including struct
+<structname>v4l2_zoomcap</structname>, struct
+<structname>v4l2_zoom</structname>,
+<constant>V4L2_ZOOM_NONCAP</constant> and
+<constant>V4L2_ZOOM_WHILESTREAMING</constant> was replaced by a new
+cropping and scaling interface. The previously unused struct
+<structname>v4l2_cropcap</structname> and
+<structname>v4l2_crop</structname> where redefined for this purpose.
+See <xref linkend="crop" /> for details.</para>
+ </listitem>
+
+ <listitem>
+ <para>In &v4l2-vbi-format; the
+<structfield>SAMPLE_FORMAT</structfield> field now contains a
+four-character-code as used to identify video image formats and
+<constant>V4L2_PIX_FMT_GREY</constant> replaces the
+<constant>V4L2_VBI_SF_UBYTE</constant> define. The
+<structfield>reserved</structfield> field was extended.</para>
+ </listitem>
+
+ <listitem>
+ <para>In &v4l2-captureparm; the type of the
+<structfield>timeperframe</structfield> field changed from unsigned
+long to &v4l2-fract;. This allows the accurate expression of multiples
+of the NTSC-M frame rate 30000 / 1001. A new field
+<structfield>readbuffers</structfield> was added to control the driver
+behaviour in read I/O mode.</para>
+
+ <para>Similar changes were made to &v4l2-outputparm;.</para>
+ </listitem>
+
+ <listitem>
+ <para>The struct <structname>v4l2_performance</structname>
+and <constant>VIDIOC_G_PERF</constant> ioctl were dropped. Except when
+using the <link linkend="rw">read/write I/O method</link>, which is
+limited anyway, this information is already available to
+applications.</para>
+ </listitem>
+
+ <listitem>
+ <para>The example transformation from RGB to YCbCr color
+space in the old V4L2 documentation was inaccurate, this has been
+corrected in <xref linkend="pixfmt" />.<!-- 0.5670G should be
+0.587, and 127/112 != 255/224 --></para>
+ </listitem>
+ </orderedlist>
+ </section>
+
+ <section>
+ <title>V4L2 2003-06-19</title>
+
+ <orderedlist>
+ <listitem>
+ <para>A new capability flag
+<constant>V4L2_CAP_RADIO</constant> was added for radio devices. Prior
+to this change radio devices would identify solely by having exactly one
+tuner whose type field reads <constant>V4L2_TUNER_RADIO</constant>.</para>
+ </listitem>
+
+ <listitem>
+ <para>An optional driver access priority mechanism was
+added, see <xref linkend="app-pri" /> for details.</para>
+ </listitem>
+
+ <listitem>
+ <para>The audio input and output interface was found to be
+incomplete.</para>
+ <para>Previously the &VIDIOC-G-AUDIO;
+ioctl would enumerate the available audio inputs. An ioctl to
+determine the current audio input, if more than one combines with the
+current video input, did not exist. So
+<constant>VIDIOC_G_AUDIO</constant> was renamed to
+<constant>VIDIOC_G_AUDIO_OLD</constant>, this ioctl was removed on
+Kernel 2.6.39. The &VIDIOC-ENUMAUDIO; ioctl was added to enumerate
+audio inputs, while &VIDIOC-G-AUDIO; now reports the current audio
+input.</para>
+ <para>The same changes were made to &VIDIOC-G-AUDOUT; and
+&VIDIOC-ENUMAUDOUT;.</para>
+ <para>Until further the "videodev" module will automatically
+translate between the old and new ioctls, but drivers and applications
+must be updated to successfully compile again.</para>
+ </listitem>
+
+ <listitem>
+ <para>The &VIDIOC-OVERLAY; ioctl was incorrectly defined with
+write-read parameter. It was changed to write-only, while the write-read
+version was renamed to <constant>VIDIOC_OVERLAY_OLD</constant>. The old
+ioctl was removed on Kernel 2.6.39. Until further the "videodev"
+kernel module will automatically translate to the new version, so drivers
+must be recompiled, but not applications.</para>
+ </listitem>
+
+ <listitem>
+ <para><xref linkend="overlay" /> incorrectly stated that
+clipping rectangles define regions where the video can be seen.
+Correct is that clipping rectangles define regions where
+<emphasis>no</emphasis> video shall be displayed and so the graphics
+surface can be seen.</para>
+ </listitem>
+
+ <listitem>
+ <para>The &VIDIOC-S-PARM; and &VIDIOC-S-CTRL; ioctls were
+defined with write-only parameter, inconsistent with other ioctls
+modifying their argument. They were changed to write-read, while a
+<constant>_OLD</constant> suffix was added to the write-only versions.
+The old ioctls were removed on Kernel 2.6.39. Drivers and
+applications assuming a constant parameter need an update.</para>
+ </listitem>
+ </orderedlist>
+ </section>
+
+ <section>
+ <title>V4L2 2003-11-05</title>
+ <orderedlist>
+ <listitem>
+ <para>In <xref linkend="pixfmt-rgb" /> the following pixel
+formats were incorrectly transferred from Bill Dirks' V4L2
+specification. Descriptions below refer to bytes in memory, in
+ascending address order.<informaltable>
+ <tgroup cols="3">
+ <thead>
+ <row>
+ <entry>Symbol</entry>
+ <entry>In this document prior to revision
+0.5</entry>
+ <entry>Corrected</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_PIX_FMT_RGB24</constant></entry>
+ <entry>B, G, R</entry>
+ <entry>R, G, B</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_PIX_FMT_BGR24</constant></entry>
+ <entry>R, G, B</entry>
+ <entry>B, G, R</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_PIX_FMT_RGB32</constant></entry>
+ <entry>B, G, R, X</entry>
+ <entry>R, G, B, X</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_PIX_FMT_BGR32</constant></entry>
+ <entry>R, G, B, X</entry>
+ <entry>B, G, R, X</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable> The
+<constant>V4L2_PIX_FMT_BGR24</constant> example was always
+correct.</para>
+ <para>In <xref linkend="v4l-image-properties" /> the mapping
+of the V4L <constant>VIDEO_PALETTE_RGB24</constant> and
+<constant>VIDEO_PALETTE_RGB32</constant> formats to V4L2 pixel formats
+was accordingly corrected.</para>
+ </listitem>
+
+ <listitem>
+ <para>Unrelated to the fixes above, drivers may still
+interpret some V4L2 RGB pixel formats differently. These issues have
+yet to be addressed, for details see <xref
+ linkend="pixfmt-rgb" />.</para>
+ </listitem>
+ </orderedlist>
+ </section>
+
+ <section>
+ <title>V4L2 in Linux 2.6.6, 2004-05-09</title>
+ <orderedlist>
+ <listitem>
+ <para>The &VIDIOC-CROPCAP; ioctl was incorrectly defined
+with read-only parameter. It is now defined as write-read ioctl, while
+the read-only version was renamed to
+<constant>VIDIOC_CROPCAP_OLD</constant>. The old ioctl was removed
+on Kernel 2.6.39.</para>
+ </listitem>
+ </orderedlist>
+ </section>
+
+ <section>
+ <title>V4L2 in Linux 2.6.8</title>
+ <orderedlist>
+ <listitem>
+ <para>A new field <structfield>input</structfield> (former
+<structfield>reserved[0]</structfield>) was added to the &v4l2-buffer;
+structure. Purpose of this field is to alternate between video inputs
+(&eg; cameras) in step with the video capturing process. This function
+must be enabled with the new <constant>V4L2_BUF_FLAG_INPUT</constant>
+flag. The <structfield>flags</structfield> field is no longer
+read-only.</para>
+ </listitem>
+ </orderedlist>
+ </section>
+
+ <section>
+ <title>V4L2 spec erratum 2004-08-01</title>
+
+ <orderedlist>
+ <listitem>
+ <para>The return value of the
+<xref linkend="func-open" /> function was incorrectly documented.</para>
+ </listitem>
+
+ <listitem>
+ <para>Audio output ioctls end in -AUDOUT, not -AUDIOOUT.</para>
+ </listitem>
+
+ <listitem>
+ <para>In the Current Audio Input example the
+<constant>VIDIOC_G_AUDIO</constant> ioctl took the wrong
+argument.</para>
+ </listitem>
+
+ <listitem>
+ <para>The documentation of the &VIDIOC-QBUF; and
+&VIDIOC-DQBUF; ioctls did not mention the &v4l2-buffer;
+<structfield>memory</structfield> field. It was also missing from
+examples. Also on the <constant>VIDIOC_DQBUF</constant> page the &EIO;
+was not documented.</para>
+ </listitem>
+ </orderedlist>
+ </section>
+
+ <section>
+ <title>V4L2 in Linux 2.6.14</title>
+ <orderedlist>
+ <listitem>
+ <para>A new sliced VBI interface was added. It is documented
+in <xref linkend="sliced" /> and replaces the interface first
+proposed in V4L2 specification 0.8.</para>
+ </listitem>
+ </orderedlist>
+ </section>
+
+ <section>
+ <title>V4L2 in Linux 2.6.15</title>
+ <orderedlist>
+ <listitem>
+ <para>The &VIDIOC-LOG-STATUS; ioctl was added.</para>
+ </listitem>
+
+ <listitem>
+ <para>New video standards
+<constant>V4L2_STD_NTSC_443</constant>,
+<constant>V4L2_STD_SECAM_LC</constant>,
+<constant>V4L2_STD_SECAM_DK</constant> (a set of SECAM D, K and K1),
+and <constant>V4L2_STD_ATSC</constant> (a set of
+<constant>V4L2_STD_ATSC_8_VSB</constant> and
+<constant>V4L2_STD_ATSC_16_VSB</constant>) were defined. Note the
+<constant>V4L2_STD_525_60</constant> set now includes
+<constant>V4L2_STD_NTSC_443</constant>. See also <xref
+ linkend="v4l2-std-id" />.</para>
+ </listitem>
+
+ <listitem>
+ <para>The <constant>VIDIOC_G_COMP</constant> and
+<constant>VIDIOC_S_COMP</constant> ioctl were renamed to
+<constant>VIDIOC_G_MPEGCOMP</constant> and
+<constant>VIDIOC_S_MPEGCOMP</constant> respectively. Their argument
+was replaced by a struct
+<structname>v4l2_mpeg_compression</structname> pointer. (The
+<constant>VIDIOC_G_MPEGCOMP</constant> and
+<constant>VIDIOC_S_MPEGCOMP</constant> ioctls where removed in Linux
+2.6.25.)</para>
+ </listitem>
+ </orderedlist>
+ </section>
+
+ <section>
+ <title>V4L2 spec erratum 2005-11-27</title>
+ <para>The capture example in <xref linkend="capture-example" />
+called the &VIDIOC-S-CROP; ioctl without checking if cropping is
+supported. In the video standard selection example in
+<xref linkend="standard" /> the &VIDIOC-S-STD; call used the wrong
+argument type.</para>
+ </section>
+
+ <section>
+ <title>V4L2 spec erratum 2006-01-10</title>
+ <orderedlist>
+ <listitem>
+ <para>The <constant>V4L2_IN_ST_COLOR_KILL</constant> flag in
+&v4l2-input; not only indicates if the color killer is enabled, but
+also if it is active. (The color killer disables color decoding when
+it detects no color in the video signal to improve the image
+quality.)</para>
+ </listitem>
+
+ <listitem>
+ <para>&VIDIOC-S-PARM; is a write-read ioctl, not write-only as
+stated on its reference page. The ioctl changed in 2003 as noted above.</para>
+ </listitem>
+ </orderedlist>
+ </section>
+
+ <section>
+ <title>V4L2 spec erratum 2006-02-03</title>
+ <orderedlist>
+ <listitem>
+ <para>In &v4l2-captureparm; and &v4l2-outputparm; the
+<structfield>timeperframe</structfield> field gives the time in
+seconds, not microseconds.</para>
+ </listitem>
+ </orderedlist>
+ </section>
+
+ <section>
+ <title>V4L2 spec erratum 2006-02-04</title>
+ <orderedlist>
+ <listitem>
+ <para>The <structfield>clips</structfield> field in
+&v4l2-window; must point to an array of &v4l2-clip;, not a linked
+list, because drivers ignore the struct
+<structname>v4l2_clip</structname>.<structfield>next</structfield>
+pointer.</para>
+ </listitem>
+ </orderedlist>
+ </section>
+
+ <section>
+ <title>V4L2 in Linux 2.6.17</title>
+ <orderedlist>
+ <listitem>
+ <para>New video standard macros were added:
+<constant>V4L2_STD_NTSC_M_KR</constant> (NTSC M South Korea), and the
+sets <constant>V4L2_STD_MN</constant>,
+<constant>V4L2_STD_B</constant>, <constant>V4L2_STD_GH</constant> and
+<constant>V4L2_STD_DK</constant>. The
+<constant>V4L2_STD_NTSC</constant> and
+<constant>V4L2_STD_SECAM</constant> sets now include
+<constant>V4L2_STD_NTSC_M_KR</constant> and
+<constant>V4L2_STD_SECAM_LC</constant> respectively.</para>
+ </listitem>
+
+ <listitem>
+ <para>A new <constant>V4L2_TUNER_MODE_LANG1_LANG2</constant>
+was defined to record both languages of a bilingual program. The
+use of <constant>V4L2_TUNER_MODE_STEREO</constant> for this purpose
+is deprecated now. See the &VIDIOC-G-TUNER; section for
+details.</para>
+ </listitem>
+ </orderedlist>
+ </section>
+
+ <section>
+ <title>V4L2 spec erratum 2006-09-23 (Draft 0.15)</title>
+ <orderedlist>
+ <listitem>
+ <para>In various places
+<constant>V4L2_BUF_TYPE_SLICED_VBI_CAPTURE</constant> and
+<constant>V4L2_BUF_TYPE_SLICED_VBI_OUTPUT</constant> of the sliced VBI
+interface were not mentioned along with other buffer types.</para>
+ </listitem>
+
+ <listitem>
+ <para>In <xref linkend="vidioc-g-audio" /> it was clarified
+that the &v4l2-audio; <structfield>mode</structfield> field is a flags
+field.</para>
+ </listitem>
+
+ <listitem>
+ <para><xref linkend="vidioc-querycap" /> did not mention the
+sliced VBI and radio capability flags.</para>
+ </listitem>
+
+ <listitem>
+ <para>In <xref linkend="vidioc-g-frequency" /> it was
+clarified that applications must initialize the tuner
+<structfield>type</structfield> field of &v4l2-frequency; before
+calling &VIDIOC-S-FREQUENCY;.</para>
+ </listitem>
+
+ <listitem>
+ <para>The <structfield>reserved</structfield> array
+in &v4l2-requestbuffers; has 2 elements, not 32.</para>
+ </listitem>
+
+ <listitem>
+ <para>In <xref linkend="output" /> and <xref
+ linkend="raw-vbi" /> the device file names
+<filename>/dev/vout</filename> which never caught on were replaced
+by <filename>/dev/video</filename>.</para>
+ </listitem>
+
+ <listitem>
+ <para>With Linux 2.6.15 the possible range for VBI device minor
+numbers was extended from 224-239 to 224-255. Accordingly device file names
+<filename>/dev/vbi0</filename> to <filename>/dev/vbi31</filename> are
+possible now.</para>
+ </listitem>
+ </orderedlist>
+ </section>
+
+ <section>
+ <title>V4L2 in Linux 2.6.18</title>
+ <orderedlist>
+ <listitem>
+ <para>New ioctls &VIDIOC-G-EXT-CTRLS;, &VIDIOC-S-EXT-CTRLS;
+and &VIDIOC-TRY-EXT-CTRLS; were added, a flag to skip unsupported
+controls with &VIDIOC-QUERYCTRL;, new control types
+<constant>V4L2_CTRL_TYPE_INTEGER64</constant> and
+<constant>V4L2_CTRL_TYPE_CTRL_CLASS</constant> (<xref
+ linkend="v4l2-ctrl-type" />), and new control flags
+<constant>V4L2_CTRL_FLAG_READ_ONLY</constant>,
+<constant>V4L2_CTRL_FLAG_UPDATE</constant>,
+<constant>V4L2_CTRL_FLAG_INACTIVE</constant> and
+<constant>V4L2_CTRL_FLAG_SLIDER</constant> (<xref
+ linkend="control-flags" />). See <xref
+ linkend="extended-controls" /> for details.</para>
+ </listitem>
+ </orderedlist>
+ </section>
+
+ <section>
+ <title>V4L2 in Linux 2.6.19</title>
+ <orderedlist>
+ <listitem>
+ <para>In &v4l2-sliced-vbi-cap; a buffer type field was added
+replacing a reserved field. Note on architectures where the size of
+enum types differs from int types the size of the structure changed.
+The &VIDIOC-G-SLICED-VBI-CAP; ioctl was redefined from being read-only
+to write-read. Applications must initialize the type field and clear
+the reserved fields now. These changes may <emphasis>break the
+compatibility</emphasis> with older drivers and applications.</para>
+ </listitem>
+
+ <listitem>
+ <para>The ioctls &VIDIOC-ENUM-FRAMESIZES; and
+&VIDIOC-ENUM-FRAMEINTERVALS; were added.</para>
+ </listitem>
+
+ <listitem>
+ <para>A new pixel format <constant>V4L2_PIX_FMT_RGB444</constant> (<xref
+linkend="rgb-formats" />) was added.</para>
+ </listitem>
+ </orderedlist>
+ </section>
+
+ <section>
+ <title>V4L2 spec erratum 2006-10-12 (Draft 0.17)</title>
+ <orderedlist>
+ <listitem>
+ <para><constant>V4L2_PIX_FMT_HM12</constant> (<xref
+linkend="reserved-formats" />) is a YUV 4:2:0, not 4:2:2 format.</para>
+ </listitem>
+ </orderedlist>
+ </section>
+
+ <section>
+ <title>V4L2 in Linux 2.6.21</title>
+ <orderedlist>
+ <listitem>
+ <para>The <filename>videodev2.h</filename> header file is
+now dual licensed under GNU General Public License version two or
+later, and under a 3-clause BSD-style license.</para>
+ </listitem>
+ </orderedlist>
+ </section>
+
+ <section>
+ <title>V4L2 in Linux 2.6.22</title>
+ <orderedlist>
+ <listitem>
+ <para>Two new field orders
+ <constant>V4L2_FIELD_INTERLACED_TB</constant> and
+ <constant>V4L2_FIELD_INTERLACED_BT</constant> were
+ added. See <xref linkend="v4l2-field" /> for details.</para>
+ </listitem>
+
+ <listitem>
+ <para>Three new clipping/blending methods with a global or
+straight or inverted local alpha value were added to the video overlay
+interface. See the description of the &VIDIOC-G-FBUF; and
+&VIDIOC-S-FBUF; ioctls for details.</para>
+ <para>A new <structfield>global_alpha</structfield> field
+was added to <link
+linkend="v4l2-window"><structname>v4l2_window</structname></link>,
+extending the structure. This may <emphasis>break
+compatibility</emphasis> with applications using a struct
+<structname>v4l2_window</structname> directly. However the <link
+linkend="vidioc-g-fmt">VIDIOC_G/S/TRY_FMT</link> ioctls, which take a
+pointer to a <link linkend="v4l2-format">v4l2_format</link> parent
+structure with padding bytes at the end, are not affected.</para>
+ </listitem>
+
+ <listitem>
+ <para>The format of the <structfield>chromakey</structfield>
+field in &v4l2-window; changed from "host order RGB32" to a pixel
+value in the same format as the framebuffer. This may <emphasis>break
+compatibility</emphasis> with existing applications. Drivers
+supporting the "host order RGB32" format are not known.</para>
+ </listitem>
+
+ </orderedlist>
+ </section>
+
+ <section>
+ <title>V4L2 in Linux 2.6.24</title>
+ <orderedlist>
+ <listitem>
+ <para>The pixel formats
+<constant>V4L2_PIX_FMT_PAL8</constant>,
+<constant>V4L2_PIX_FMT_YUV444</constant>,
+<constant>V4L2_PIX_FMT_YUV555</constant>,
+<constant>V4L2_PIX_FMT_YUV565</constant> and
+<constant>V4L2_PIX_FMT_YUV32</constant> were added.</para>
+ </listitem>
+ </orderedlist>
+ </section>
+
+ <section>
+ <title>V4L2 in Linux 2.6.25</title>
+ <orderedlist>
+ <listitem>
+ <para>The pixel formats <link linkend="V4L2-PIX-FMT-Y16">
+<constant>V4L2_PIX_FMT_Y16</constant></link> and <link
+linkend="V4L2-PIX-FMT-SBGGR16">
+<constant>V4L2_PIX_FMT_SBGGR16</constant></link> were added.</para>
+ </listitem>
+ <listitem>
+ <para>New <link linkend="control">controls</link>
+<constant>V4L2_CID_POWER_LINE_FREQUENCY</constant>,
+<constant>V4L2_CID_HUE_AUTO</constant>,
+<constant>V4L2_CID_WHITE_BALANCE_TEMPERATURE</constant>,
+<constant>V4L2_CID_SHARPNESS</constant> and
+<constant>V4L2_CID_BACKLIGHT_COMPENSATION</constant> were added. The
+controls <constant>V4L2_CID_BLACK_LEVEL</constant>,
+<constant>V4L2_CID_WHITENESS</constant>,
+<constant>V4L2_CID_HCENTER</constant> and
+<constant>V4L2_CID_VCENTER</constant> were deprecated.
+</para>
+ </listitem>
+ <listitem>
+ <para>A <link linkend="camera-controls">Camera controls
+class</link> was added, with the new controls
+<constant>V4L2_CID_EXPOSURE_AUTO</constant>,
+<constant>V4L2_CID_EXPOSURE_ABSOLUTE</constant>,
+<constant>V4L2_CID_EXPOSURE_AUTO_PRIORITY</constant>,
+<constant>V4L2_CID_PAN_RELATIVE</constant>,
+<constant>V4L2_CID_TILT_RELATIVE</constant>,
+<constant>V4L2_CID_PAN_RESET</constant>,
+<constant>V4L2_CID_TILT_RESET</constant>,
+<constant>V4L2_CID_PAN_ABSOLUTE</constant>,
+<constant>V4L2_CID_TILT_ABSOLUTE</constant>,
+<constant>V4L2_CID_FOCUS_ABSOLUTE</constant>,
+<constant>V4L2_CID_FOCUS_RELATIVE</constant> and
+<constant>V4L2_CID_FOCUS_AUTO</constant>.</para>
+ </listitem>
+ <listitem>
+ <para>The <constant>VIDIOC_G_MPEGCOMP</constant> and
+<constant>VIDIOC_S_MPEGCOMP</constant> ioctls, which were superseded
+by the <link linkend="extended-controls">extended controls</link>
+interface in Linux 2.6.18, where finally removed from the
+<filename>videodev2.h</filename> header file.</para>
+ </listitem>
+ </orderedlist>
+ </section>
+
+ <section>
+ <title>V4L2 in Linux 2.6.26</title>
+ <orderedlist>
+ <listitem>
+ <para>The pixel formats
+<constant>V4L2_PIX_FMT_Y16</constant> and
+<constant>V4L2_PIX_FMT_SBGGR16</constant> were added.</para>
+ </listitem>
+ <listitem>
+ <para>Added user controls
+<constant>V4L2_CID_CHROMA_AGC</constant> and
+<constant>V4L2_CID_COLOR_KILLER</constant>.</para>
+ </listitem>
+ </orderedlist>
+ </section>
+
+ <section>
+ <title>V4L2 in Linux 2.6.27</title>
+ <orderedlist>
+ <listitem>
+ <para>The &VIDIOC-S-HW-FREQ-SEEK; ioctl and the
+<constant>V4L2_CAP_HW_FREQ_SEEK</constant> capability were added.</para>
+ </listitem>
+ <listitem>
+ <para>The pixel formats
+<constant>V4L2_PIX_FMT_YVYU</constant>,
+<constant>V4L2_PIX_FMT_PCA501</constant>,
+<constant>V4L2_PIX_FMT_PCA505</constant>,
+<constant>V4L2_PIX_FMT_PCA508</constant>,
+<constant>V4L2_PIX_FMT_PCA561</constant>,
+<constant>V4L2_PIX_FMT_SGBRG8</constant>,
+<constant>V4L2_PIX_FMT_PAC207</constant> and
+<constant>V4L2_PIX_FMT_PJPG</constant> were added.</para>
+ </listitem>
+ </orderedlist>
+ </section>
+
+ <section>
+ <title>V4L2 in Linux 2.6.28</title>
+ <orderedlist>
+ <listitem>
+ <para>Added <constant>V4L2_MPEG_AUDIO_ENCODING_AAC</constant> and
+<constant>V4L2_MPEG_AUDIO_ENCODING_AC3</constant> MPEG audio encodings.</para>
+ </listitem>
+ <listitem>
+ <para>Added <constant>V4L2_MPEG_VIDEO_ENCODING_MPEG_4_AVC</constant> MPEG
+video encoding.</para>
+ </listitem>
+ <listitem>
+ <para>The pixel formats
+<constant>V4L2_PIX_FMT_SGRBG10</constant> and
+<constant>V4L2_PIX_FMT_SGRBG10DPCM8</constant> were added.</para>
+ </listitem>
+ </orderedlist>
+ </section>
+
+ <section>
+ <title>V4L2 in Linux 2.6.29</title>
+ <orderedlist>
+ <listitem>
+ <para>The <constant>VIDIOC_G_CHIP_IDENT</constant> ioctl was renamed
+to <constant>VIDIOC_G_CHIP_IDENT_OLD</constant> and <constant>VIDIOC_DBG_G_CHIP_IDENT</constant>
+was introduced in its place. The old struct <structname>v4l2_chip_ident</structname>
+was renamed to <structname id="v4l2-chip-ident-old">v4l2_chip_ident_old</structname>.</para>
+ </listitem>
+ <listitem>
+ <para>The pixel formats
+<constant>V4L2_PIX_FMT_VYUY</constant>,
+<constant>V4L2_PIX_FMT_NV16</constant> and
+<constant>V4L2_PIX_FMT_NV61</constant> were added.</para>
+ </listitem>
+ <listitem>
+ <para>Added camera controls
+<constant>V4L2_CID_ZOOM_ABSOLUTE</constant>,
+<constant>V4L2_CID_ZOOM_RELATIVE</constant>,
+<constant>V4L2_CID_ZOOM_CONTINUOUS</constant> and
+<constant>V4L2_CID_PRIVACY</constant>.</para>
+ </listitem>
+ </orderedlist>
+ </section>
+ <section>
+ <title>V4L2 in Linux 2.6.30</title>
+ <orderedlist>
+ <listitem>
+ <para>New control flag <constant>V4L2_CTRL_FLAG_WRITE_ONLY</constant> was added.</para>
+ </listitem>
+ <listitem>
+ <para>New control <constant>V4L2_CID_COLORFX</constant> was added.</para>
+ </listitem>
+ </orderedlist>
+ </section>
+ <section>
+ <title>V4L2 in Linux 2.6.32</title>
+ <orderedlist>
+ <listitem>
+ <para>In order to be easier to compare a V4L2 API and a kernel
+version, now V4L2 API is numbered using the Linux Kernel version numeration.</para>
+ </listitem>
+ <listitem>
+ <para>Finalized the RDS capture API. See <xref linkend="rds" /> for
+more information.</para>
+ </listitem>
+ <listitem>
+ <para>Added new capabilities for modulators and RDS encoders.</para>
+ </listitem>
+ <listitem>
+ <para>Add description for libv4l API.</para>
+ </listitem>
+ <listitem>
+ <para>Added support for string controls via new type <constant>V4L2_CTRL_TYPE_STRING</constant>.</para>
+ </listitem>
+ <listitem>
+ <para>Added <constant>V4L2_CID_BAND_STOP_FILTER</constant> documentation.</para>
+ </listitem>
+ <listitem>
+ <para>Added FM Modulator (FM TX) Extended Control Class: <constant>V4L2_CTRL_CLASS_FM_TX</constant> and their Control IDs.</para>
+ </listitem>
+<listitem>
+ <para>Added FM Receiver (FM RX) Extended Control Class: <constant>V4L2_CTRL_CLASS_FM_RX</constant> and their Control IDs.</para>
+ </listitem>
+ <listitem>
+ <para>Added Remote Controller chapter, describing the default Remote Controller mapping for media devices.</para>
+ </listitem>
+ </orderedlist>
+ </section>
+ <section>
+ <title>V4L2 in Linux 2.6.33</title>
+ <orderedlist>
+ <listitem>
+ <para>Added support for Digital Video timings in order to support HDTV receivers and transmitters.</para>
+ </listitem>
+ </orderedlist>
+ </section>
+ <section>
+ <title>V4L2 in Linux 2.6.34</title>
+ <orderedlist>
+ <listitem>
+ <para>Added
+<constant>V4L2_CID_IRIS_ABSOLUTE</constant> and
+<constant>V4L2_CID_IRIS_RELATIVE</constant> controls to the
+ <link linkend="camera-controls">Camera controls class</link>.
+ </para>
+ </listitem>
+ </orderedlist>
+ </section>
+ <section>
+ <title>V4L2 in Linux 2.6.37</title>
+ <orderedlist>
+ <listitem>
+ <para>Remove the vtx (videotext/teletext) API. This API was no longer
+used and no hardware exists to verify the API. Nor were any userspace applications found
+that used it. It was originally scheduled for removal in 2.6.35.
+ </para>
+ </listitem>
+ </orderedlist>
+ </section>
+ <section>
+ <title>V4L2 in Linux 2.6.39</title>
+ <orderedlist>
+ <listitem>
+ <para>The old VIDIOC_*_OLD symbols and V4L1 support were removed.</para>
+ </listitem>
+ <listitem>
+ <para>Multi-planar API added. Does not affect the compatibility of
+ current drivers and applications. See
+ <link linkend="planar-apis">multi-planar API</link>
+ for details.</para>
+ </listitem>
+ </orderedlist>
+ </section>
+ <section>
+ <title>V4L2 in Linux 3.1</title>
+ <orderedlist>
+ <listitem>
+ <para>VIDIOC_QUERYCAP now returns a per-subsystem version instead of a per-driver one.</para>
+ <para>Standardize an error code for invalid ioctl.</para>
+ <para>Added V4L2_CTRL_TYPE_BITMASK.</para>
+ </listitem>
+ </orderedlist>
+ </section>
+ <section>
+ <title>V4L2 in Linux 3.2</title>
+ <orderedlist>
+ <listitem>
+ <para>V4L2_CTRL_FLAG_VOLATILE was added to signal volatile controls to userspace.</para>
+ </listitem>
+ <listitem>
+ <para>Add selection API for extended control over cropping
+ and composing. Does not affect the compatibility of current
+ drivers and applications. See <link
+ linkend="selection-api"> selection API </link> for
+ details.</para>
+ </listitem>
+ </orderedlist>
+ </section>
+
+ <section>
+ <title>V4L2 in Linux 3.3</title>
+ <orderedlist>
+ <listitem>
+ <para>Added <constant>V4L2_CID_ALPHA_COMPONENT</constant> control
+ to the <link linkend="control">User controls class</link>.
+ </para>
+ </listitem>
+ <listitem>
+ <para>Added the device_caps field to struct v4l2_capabilities and added the new
+ V4L2_CAP_DEVICE_CAPS capability.</para>
+ </listitem>
+ </orderedlist>
+ </section>
+
+ <section>
+ <title>V4L2 in Linux 3.4</title>
+ <orderedlist>
+ <listitem>
+ <para>Added <link linkend="jpeg-controls">JPEG compression control
+ class</link>.</para>
+ </listitem>
+ <listitem>
+ <para>Extended the DV Timings API:
+ &VIDIOC-ENUM-DV-TIMINGS;, &VIDIOC-QUERY-DV-TIMINGS; and
+ &VIDIOC-DV-TIMINGS-CAP;.</para>
+ </listitem>
+ </orderedlist>
+ </section>
+
+ <section>
+ <title>V4L2 in Linux 3.5</title>
+ <orderedlist>
+ <listitem>
+ <para>Added integer menus, the new type will be
+ V4L2_CTRL_TYPE_INTEGER_MENU.</para>
+ </listitem>
+ <listitem>
+ <para>Added selection API for V4L2 subdev interface:
+ &VIDIOC-SUBDEV-G-SELECTION; and
+ &VIDIOC-SUBDEV-S-SELECTION;.</para>
+ </listitem>
+ <listitem>
+ <para> Added <constant>V4L2_COLORFX_ANTIQUE</constant>,
+ <constant>V4L2_COLORFX_ART_FREEZE</constant>,
+ <constant>V4L2_COLORFX_AQUA</constant>,
+ <constant>V4L2_COLORFX_SILHOUETTE</constant>,
+ <constant>V4L2_COLORFX_SOLARIZATION</constant>,
+ <constant>V4L2_COLORFX_VIVID</constant> and
+ <constant>V4L2_COLORFX_ARBITRARY_CBCR</constant> menu items
+ to the <constant>V4L2_CID_COLORFX</constant> control.</para>
+ </listitem>
+ <listitem>
+ <para> Added <constant>V4L2_CID_COLORFX_CBCR</constant> control.</para>
+ </listitem>
+ <listitem>
+ <para> Added camera controls <constant>V4L2_CID_AUTO_EXPOSURE_BIAS</constant>,
+ <constant>V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE</constant>,
+ <constant>V4L2_CID_IMAGE_STABILIZATION</constant>,
+ <constant>V4L2_CID_ISO_SENSITIVITY</constant>,
+ <constant>V4L2_CID_ISO_SENSITIVITY_AUTO</constant>,
+ <constant>V4L2_CID_EXPOSURE_METERING</constant>,
+ <constant>V4L2_CID_SCENE_MODE</constant>,
+ <constant>V4L2_CID_3A_LOCK</constant>,
+ <constant>V4L2_CID_AUTO_FOCUS_START</constant>,
+ <constant>V4L2_CID_AUTO_FOCUS_STOP</constant>,
+ <constant>V4L2_CID_AUTO_FOCUS_STATUS</constant> and
+ <constant>V4L2_CID_AUTO_FOCUS_RANGE</constant>.
+ </para>
+ </listitem>
+ </orderedlist>
+ </section>
+
+ <section>
+ <title>V4L2 in Linux 3.6</title>
+ <orderedlist>
+ <listitem>
+ <para>Replaced <structfield>input</structfield> in
+ <structname>v4l2_buffer</structname> by
+ <structfield>reserved2</structfield> and removed
+ <constant>V4L2_BUF_FLAG_INPUT</constant>.</para>
+ </listitem>
+ <listitem>
+ <para>Added V4L2_CAP_VIDEO_M2M and V4L2_CAP_VIDEO_M2M_MPLANE capabilities.</para>
+ </listitem>
+ <listitem>
+ <para>Added support for frequency band enumerations: &VIDIOC-ENUM-FREQ-BANDS;.</para>
+ </listitem>
+ </orderedlist>
+ </section>
+
+ <section>
+ <title>V4L2 in Linux 3.9</title>
+ <orderedlist>
+ <listitem>
+ <para>Added timestamp types to
+ <structfield>flags</structfield> field in
+ <structname>v4l2_buffer</structname>. See <xref
+ linkend="buffer-flags" />.</para>
+ </listitem>
+ <listitem>
+ <para>Added <constant>V4L2_EVENT_CTRL_CH_RANGE</constant> control event
+ changes flag. See <xref linkend="ctrl-changes-flags"/>.</para>
+ </listitem>
+ </orderedlist>
+ </section>
+
+ <section>
+ <title>V4L2 in Linux 3.10</title>
+ <orderedlist>
+ <listitem>
+ <para>Removed obsolete and unused DV_PRESET ioctls
+ VIDIOC_G_DV_PRESET, VIDIOC_S_DV_PRESET, VIDIOC_QUERY_DV_PRESET and
+ VIDIOC_ENUM_DV_PRESET. Remove the related v4l2_input/output capability
+ flags V4L2_IN_CAP_PRESETS and V4L2_OUT_CAP_PRESETS.
+ </para>
+ </listitem>
+ <listitem>
+ <para>Added new debugging ioctl &VIDIOC-DBG-G-CHIP-INFO;.
+ </para>
+ </listitem>
+ </orderedlist>
+ </section>
+
+ <section>
+ <title>V4L2 in Linux 3.11</title>
+ <orderedlist>
+ <listitem>
+ <para>Remove obsolete <constant>VIDIOC_DBG_G_CHIP_IDENT</constant> ioctl.
+ </para>
+ </listitem>
+ </orderedlist>
+ </section>
+
+ <section>
+ <title>V4L2 in Linux 3.14</title>
+ <orderedlist>
+ <listitem>
+ <para> In struct <structname>v4l2_rect</structname>, the type
+of <structfield>width</structfield> and <structfield>height</structfield>
+fields changed from _s32 to _u32.
+ </para>
+ </listitem>
+ </orderedlist>
+ </section>
+
+ <section>
+ <title>V4L2 in Linux 3.15</title>
+ <orderedlist>
+ <listitem>
+ <para>Added Software Defined Radio (SDR) Interface.
+ </para>
+ </listitem>
+ </orderedlist>
+ </section>
+
+ <section>
+ <title>V4L2 in Linux 3.16</title>
+ <orderedlist>
+ <listitem>
+ <para>Added event V4L2_EVENT_SOURCE_CHANGE.
+ </para>
+ </listitem>
+ </orderedlist>
+ </section>
+
+ <section>
+ <title>V4L2 in Linux 3.17</title>
+ <orderedlist>
+ <listitem>
+ <para>Extended &v4l2-pix-format;. Added format flags.
+ </para>
+ </listitem>
+ <listitem>
+ <para>Added compound control types and &VIDIOC-QUERY-EXT-CTRL;.
+ </para>
+ </listitem>
+ </orderedlist>
+ </section>
+
+ <section>
+ <title>V4L2 in Linux 3.18</title>
+ <orderedlist>
+ <listitem>
+ <para>Added <constant>V4L2_CID_PAN_SPEED</constant> and
+ <constant>V4L2_CID_TILT_SPEED</constant> camera controls.</para>
+ </listitem>
+ </orderedlist>
+ </section>
+
+ <section>
+ <title>V4L2 in Linux 3.19</title>
+ <orderedlist>
+ <listitem>
+ <para>Rewrote Colorspace chapter, added new &v4l2-ycbcr-encoding;
+and &v4l2-quantization; fields to &v4l2-pix-format;, &v4l2-pix-format-mplane;
+and &v4l2-mbus-framefmt;.
+ </para>
+ </listitem>
+ </orderedlist>
+ </section>
+
+ <section id="other">
+ <title>Relation of V4L2 to other Linux multimedia APIs</title>
+
+ <section id="xvideo">
+ <title>X Video Extension</title>
+
+ <para>The X Video Extension (abbreviated XVideo or just Xv) is
+an extension of the X Window system, implemented for example by the
+XFree86 project. Its scope is similar to V4L2, an API to video capture
+and output devices for X clients. Xv allows applications to display
+live video in a window, send window contents to a TV output, and
+capture or output still images in XPixmaps<footnote>
+ <para>This is not implemented in XFree86.</para>
+ </footnote>. With their implementation XFree86 makes the
+extension available across many operating systems and
+architectures.</para>
+
+ <para>Because the driver is embedded into the X server Xv has a
+number of advantages over the V4L2 <link linkend="overlay">video
+overlay interface</link>. The driver can easily determine the overlay
+target, &ie; visible graphics memory or off-screen buffers for a
+destructive overlay. It can program the RAMDAC for a non-destructive
+overlay, scaling or color-keying, or the clipping functions of the
+video capture hardware, always in sync with drawing operations or
+windows moving or changing their stacking order.</para>
+
+ <para>To combine the advantages of Xv and V4L a special Xv
+driver exists in XFree86 and XOrg, just programming any overlay capable
+Video4Linux device it finds. To enable it
+<filename>/etc/X11/XF86Config</filename> must contain these lines:</para>
+ <para><screen>
+Section "Module"
+ Load "v4l"
+EndSection</screen></para>
+
+ <para>As of XFree86 4.2 this driver still supports only V4L
+ioctls, however it should work just fine with all V4L2 devices through
+the V4L2 backward-compatibility layer. Since V4L2 permits multiple
+opens it is possible (if supported by the V4L2 driver) to capture
+video while an X client requested video overlay. Restrictions of
+simultaneous capturing and overlay are discussed in <xref
+ linkend="overlay" /> apply.</para>
+
+ <para>Only marginally related to V4L2, XFree86 extended Xv to
+support hardware YUV to RGB conversion and scaling for faster video
+playback, and added an interface to MPEG-2 decoding hardware. This API
+is useful to display images captured with V4L2 devices.</para>
+ </section>
+
+ <section>
+ <title>Digital Video</title>
+
+ <para>V4L2 does not support digital terrestrial, cable or
+satellite broadcast. A separate project aiming at digital receivers
+exists. You can find its homepage at <ulink
+url="http://linuxtv.org">http://linuxtv.org</ulink>. The Linux DVB API
+has no connection to the V4L2 API except that drivers for hybrid
+hardware may support both.</para>
+ </section>
+
+ <section>
+ <title>Audio Interfaces</title>
+
+ <para>[to do - OSS/ALSA]</para>
+ </section>
+ </section>
+
+ <section id="experimental">
+ <title>Experimental API Elements</title>
+
+ <para>The following V4L2 API elements are currently experimental
+and may change in the future.</para>
+
+ <itemizedlist>
+ <listitem>
+ <para>Video Output Overlay (OSD) Interface, <xref
+ linkend="osd" />.</para>
+ </listitem>
+ <listitem>
+ <para>&VIDIOC-DBG-G-REGISTER; and &VIDIOC-DBG-S-REGISTER;
+ioctls.</para>
+ </listitem>
+ <listitem>
+ <para>&VIDIOC-DBG-G-CHIP-INFO; ioctl.</para>
+ </listitem>
+ <listitem>
+ <para>&VIDIOC-ENUM-DV-TIMINGS;, &VIDIOC-QUERY-DV-TIMINGS; and
+ &VIDIOC-DV-TIMINGS-CAP; ioctls.</para>
+ </listitem>
+ <listitem>
+ <para>Flash API. <xref linkend="flash-controls" /></para>
+ </listitem>
+ <listitem>
+ <para>&VIDIOC-CREATE-BUFS; and &VIDIOC-PREPARE-BUF; ioctls.</para>
+ </listitem>
+ <listitem>
+ <para>Selection API. <xref linkend="selection-api" /></para>
+ </listitem>
+ <listitem>
+ <para>Sub-device selection API: &VIDIOC-SUBDEV-G-SELECTION;
+ and &VIDIOC-SUBDEV-S-SELECTION; ioctls.</para>
+ </listitem>
+ <listitem>
+ <para>Support for frequency band enumeration: &VIDIOC-ENUM-FREQ-BANDS; ioctl.</para>
+ </listitem>
+ <listitem>
+ <para>Vendor and device specific media bus pixel formats.
+ <xref linkend="v4l2-mbus-vendor-spec-fmts" />.</para>
+ </listitem>
+ <listitem>
+ <para>Importing DMABUF file descriptors as a new IO method described
+ in <xref linkend="dmabuf" />.</para>
+ </listitem>
+ <listitem>
+ <para>Exporting DMABUF files using &VIDIOC-EXPBUF; ioctl.</para>
+ </listitem>
+ <listitem>
+ <para>Software Defined Radio (SDR) Interface, <xref linkend="sdr" />.</para>
+ </listitem>
+ </itemizedlist>
+ </section>
+
+ <section id="obsolete">
+ <title>Obsolete API Elements</title>
+
+ <para>The following V4L2 API elements were superseded by new
+interfaces and should not be implemented in new drivers.</para>
+
+ <itemizedlist>
+ <listitem>
+ <para><constant>VIDIOC_G_MPEGCOMP</constant> and
+<constant>VIDIOC_S_MPEGCOMP</constant> ioctls. Use Extended Controls,
+<xref linkend="extended-controls" />.</para>
+ </listitem>
+ <listitem>
+ <para>VIDIOC_G_DV_PRESET, VIDIOC_S_DV_PRESET, VIDIOC_ENUM_DV_PRESETS and
+ VIDIOC_QUERY_DV_PRESET ioctls. Use the DV Timings API (<xref linkend="dv-timings" />).</para>
+ </listitem>
+ <listitem>
+ <para><constant>VIDIOC_SUBDEV_G_CROP</constant> and
+ <constant>VIDIOC_SUBDEV_S_CROP</constant> ioctls. Use
+ <constant>VIDIOC_SUBDEV_G_SELECTION</constant> and
+ <constant>VIDIOC_SUBDEV_S_SELECTION</constant>, <xref
+ linkend="vidioc-subdev-g-selection" />.</para>
+ </listitem>
+ </itemizedlist>
+ </section>
+ </section>
diff --git a/Documentation/DocBook/media/v4l/controls.xml b/Documentation/DocBook/media/v4l/controls.xml
new file mode 100644
index 000000000..4e9462f1a
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/controls.xml
@@ -0,0 +1,5464 @@
+ <section id="control">
+ <title>User Controls</title>
+
+ <para>Devices typically have a number of user-settable controls
+such as brightness, saturation and so on, which would be presented to
+the user on a graphical user interface. But, different devices
+will have different controls available, and furthermore, the range of
+possible values, and the default value will vary from device to
+device. The control ioctls provide the information and a mechanism to
+create a nice user interface for these controls that will work
+correctly with any device.</para>
+
+ <para>All controls are accessed using an ID value. V4L2 defines
+several IDs for specific purposes. Drivers can also implement their
+own custom controls using <constant>V4L2_CID_PRIVATE_BASE</constant>
+<footnote><para>The use of <constant>V4L2_CID_PRIVATE_BASE</constant>
+is problematic because different drivers may use the same
+<constant>V4L2_CID_PRIVATE_BASE</constant> ID for different controls.
+This makes it hard to programatically set such controls since the meaning
+of the control with that ID is driver dependent. In order to resolve this
+drivers use unique IDs and the <constant>V4L2_CID_PRIVATE_BASE</constant>
+IDs are mapped to those unique IDs by the kernel. Consider these
+<constant>V4L2_CID_PRIVATE_BASE</constant> IDs as aliases to the real
+IDs.</para>
+<para>Many applications today still use the <constant>V4L2_CID_PRIVATE_BASE</constant>
+IDs instead of using &VIDIOC-QUERYCTRL; with the <constant>V4L2_CTRL_FLAG_NEXT_CTRL</constant>
+flag to enumerate all IDs, so support for <constant>V4L2_CID_PRIVATE_BASE</constant>
+is still around.</para></footnote>
+and higher values. The pre-defined control IDs have the prefix
+<constant>V4L2_CID_</constant>, and are listed in <xref
+linkend="control-id" />. The ID is used when querying the attributes of
+a control, and when getting or setting the current value.</para>
+
+ <para>Generally applications should present controls to the user
+without assumptions about their purpose. Each control comes with a
+name string the user is supposed to understand. When the purpose is
+non-intuitive the driver writer should provide a user manual, a user
+interface plug-in or a driver specific panel application. Predefined
+IDs were introduced to change a few controls programmatically, for
+example to mute a device during a channel switch.</para>
+
+ <para>Drivers may enumerate different controls after switching
+the current video input or output, tuner or modulator, or audio input
+or output. Different in the sense of other bounds, another default and
+current value, step size or other menu items. A control with a certain
+<emphasis>custom</emphasis> ID can also change name and
+type.</para>
+
+ <para>If a control is not applicable to the current configuration
+of the device (for example, it doesn't apply to the current video input)
+drivers set the <constant>V4L2_CTRL_FLAG_INACTIVE</constant> flag.</para>
+
+ <para>Control values are stored globally, they do not
+change when switching except to stay within the reported bounds. They
+also do not change &eg; when the device is opened or closed, when the
+tuner radio frequency is changed or generally never without
+application request.</para>
+
+ <para>V4L2 specifies an event mechanism to notify applications
+when controls change value (see &VIDIOC-SUBSCRIBE-EVENT;, event
+<constant>V4L2_EVENT_CTRL</constant>), panel applications might want to make
+use of that in order to always reflect the correct control value.</para>
+
+ <para>
+ All controls use machine endianness.
+ </para>
+
+ <table pgwide="1" frame="none" id="control-id">
+ <title>Control IDs</title>
+ <tgroup cols="3">
+ &cs-def;
+ <thead>
+ <row>
+ <entry>ID</entry>
+ <entry>Type</entry>
+ <entry>Description</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_CID_BASE</constant></entry>
+ <entry></entry>
+ <entry>First predefined ID, equal to
+<constant>V4L2_CID_BRIGHTNESS</constant>.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_USER_BASE</constant></entry>
+ <entry></entry>
+ <entry>Synonym of <constant>V4L2_CID_BASE</constant>.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_BRIGHTNESS</constant></entry>
+ <entry>integer</entry>
+ <entry>Picture brightness, or more precisely, the black
+level.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_CONTRAST</constant></entry>
+ <entry>integer</entry>
+ <entry>Picture contrast or luma gain.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_SATURATION</constant></entry>
+ <entry>integer</entry>
+ <entry>Picture color saturation or chroma gain.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_HUE</constant></entry>
+ <entry>integer</entry>
+ <entry>Hue or color balance.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_AUDIO_VOLUME</constant></entry>
+ <entry>integer</entry>
+ <entry>Overall audio volume. Note some drivers also
+provide an OSS or ALSA mixer interface.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_AUDIO_BALANCE</constant></entry>
+ <entry>integer</entry>
+ <entry>Audio stereo balance. Minimum corresponds to all
+the way left, maximum to right.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_AUDIO_BASS</constant></entry>
+ <entry>integer</entry>
+ <entry>Audio bass adjustment.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_AUDIO_TREBLE</constant></entry>
+ <entry>integer</entry>
+ <entry>Audio treble adjustment.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_AUDIO_MUTE</constant></entry>
+ <entry>boolean</entry>
+ <entry>Mute audio, &ie; set the volume to zero, however
+without affecting <constant>V4L2_CID_AUDIO_VOLUME</constant>. Like
+ALSA drivers, V4L2 drivers must mute at load time to avoid excessive
+noise. Actually the entire device should be reset to a low power
+consumption state.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_AUDIO_LOUDNESS</constant></entry>
+ <entry>boolean</entry>
+ <entry>Loudness mode (bass boost).</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_BLACK_LEVEL</constant></entry>
+ <entry>integer</entry>
+ <entry>Another name for brightness (not a synonym of
+<constant>V4L2_CID_BRIGHTNESS</constant>). This control is deprecated
+and should not be used in new drivers and applications.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_AUTO_WHITE_BALANCE</constant></entry>
+ <entry>boolean</entry>
+ <entry>Automatic white balance (cameras).</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_DO_WHITE_BALANCE</constant></entry>
+ <entry>button</entry>
+ <entry>This is an action control. When set (the value is
+ignored), the device will do a white balance and then hold the current
+setting. Contrast this with the boolean
+<constant>V4L2_CID_AUTO_WHITE_BALANCE</constant>, which, when
+activated, keeps adjusting the white balance.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_RED_BALANCE</constant></entry>
+ <entry>integer</entry>
+ <entry>Red chroma balance.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_BLUE_BALANCE</constant></entry>
+ <entry>integer</entry>
+ <entry>Blue chroma balance.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_GAMMA</constant></entry>
+ <entry>integer</entry>
+ <entry>Gamma adjust.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_WHITENESS</constant></entry>
+ <entry>integer</entry>
+ <entry>Whiteness for grey-scale devices. This is a synonym
+for <constant>V4L2_CID_GAMMA</constant>. This control is deprecated
+and should not be used in new drivers and applications.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_EXPOSURE</constant></entry>
+ <entry>integer</entry>
+ <entry>Exposure (cameras). [Unit?]</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_AUTOGAIN</constant></entry>
+ <entry>boolean</entry>
+ <entry>Automatic gain/exposure control.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_GAIN</constant></entry>
+ <entry>integer</entry>
+ <entry>Gain control.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_HFLIP</constant></entry>
+ <entry>boolean</entry>
+ <entry>Mirror the picture horizontally.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_VFLIP</constant></entry>
+ <entry>boolean</entry>
+ <entry>Mirror the picture vertically.</entry>
+ </row>
+ <row id="v4l2-power-line-frequency">
+ <entry><constant>V4L2_CID_POWER_LINE_FREQUENCY</constant></entry>
+ <entry>enum</entry>
+ <entry>Enables a power line frequency filter to avoid
+flicker. Possible values for <constant>enum v4l2_power_line_frequency</constant> are:
+<constant>V4L2_CID_POWER_LINE_FREQUENCY_DISABLED</constant> (0),
+<constant>V4L2_CID_POWER_LINE_FREQUENCY_50HZ</constant> (1),
+<constant>V4L2_CID_POWER_LINE_FREQUENCY_60HZ</constant> (2) and
+<constant>V4L2_CID_POWER_LINE_FREQUENCY_AUTO</constant> (3).</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_HUE_AUTO</constant></entry>
+ <entry>boolean</entry>
+ <entry>Enables automatic hue control by the device. The
+effect of setting <constant>V4L2_CID_HUE</constant> while automatic
+hue control is enabled is undefined, drivers should ignore such
+request.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_WHITE_BALANCE_TEMPERATURE</constant></entry>
+ <entry>integer</entry>
+ <entry>This control specifies the white balance settings
+as a color temperature in Kelvin. A driver should have a minimum of
+2800 (incandescent) to 6500 (daylight). For more information about
+color temperature see <ulink
+url="http://en.wikipedia.org/wiki/Color_temperature">Wikipedia</ulink>.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_SHARPNESS</constant></entry>
+ <entry>integer</entry>
+ <entry>Adjusts the sharpness filters in a camera. The
+minimum value disables the filters, higher values give a sharper
+picture.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_BACKLIGHT_COMPENSATION</constant></entry>
+ <entry>integer</entry>
+ <entry>Adjusts the backlight compensation in a camera. The
+minimum value disables backlight compensation.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_CHROMA_AGC</constant></entry>
+ <entry>boolean</entry>
+ <entry>Chroma automatic gain control.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_CHROMA_GAIN</constant></entry>
+ <entry>integer</entry>
+ <entry>Adjusts the Chroma gain control (for use when chroma AGC
+ is disabled).</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_COLOR_KILLER</constant></entry>
+ <entry>boolean</entry>
+ <entry>Enable the color killer (&ie; force a black &amp; white image in case of a weak video signal).</entry>
+ </row>
+ <row id="v4l2-colorfx">
+ <entry><constant>V4L2_CID_COLORFX</constant></entry>
+ <entry>enum</entry>
+ <entry>Selects a color effect. The following values are defined:
+ </entry>
+ </row><row>
+ <entry></entry>
+ <entry></entry>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_COLORFX_NONE</constant>&nbsp;</entry>
+ <entry>Color effect is disabled.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_COLORFX_ANTIQUE</constant>&nbsp;</entry>
+ <entry>An aging (old photo) effect.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_COLORFX_ART_FREEZE</constant>&nbsp;</entry>
+ <entry>Frost color effect.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_COLORFX_AQUA</constant>&nbsp;</entry>
+ <entry>Water color, cool tone.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_COLORFX_BW</constant>&nbsp;</entry>
+ <entry>Black and white.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_COLORFX_EMBOSS</constant>&nbsp;</entry>
+ <entry>Emboss, the highlights and shadows replace light/dark boundaries
+ and low contrast areas are set to a gray background.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_COLORFX_GRASS_GREEN</constant>&nbsp;</entry>
+ <entry>Grass green.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_COLORFX_NEGATIVE</constant>&nbsp;</entry>
+ <entry>Negative.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_COLORFX_SEPIA</constant>&nbsp;</entry>
+ <entry>Sepia tone.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_COLORFX_SKETCH</constant>&nbsp;</entry>
+ <entry>Sketch.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_COLORFX_SKIN_WHITEN</constant>&nbsp;</entry>
+ <entry>Skin whiten.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_COLORFX_SKY_BLUE</constant>&nbsp;</entry>
+ <entry>Sky blue.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_COLORFX_SOLARIZATION</constant>&nbsp;</entry>
+ <entry>Solarization, the image is partially reversed in tone,
+ only color values above or below a certain threshold are inverted.
+ </entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_COLORFX_SILHOUETTE</constant>&nbsp;</entry>
+ <entry>Silhouette (outline).</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_COLORFX_VIVID</constant>&nbsp;</entry>
+ <entry>Vivid colors.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_COLORFX_SET_CBCR</constant>&nbsp;</entry>
+ <entry>The Cb and Cr chroma components are replaced by fixed
+ coefficients determined by <constant>V4L2_CID_COLORFX_CBCR</constant>
+ control.</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_COLORFX_CBCR</constant></entry>
+ <entry>integer</entry>
+ <entry>Determines the Cb and Cr coefficients for <constant>V4L2_COLORFX_SET_CBCR</constant>
+ color effect. Bits [7:0] of the supplied 32 bit value are interpreted as
+ Cr component, bits [15:8] as Cb component and bits [31:16] must be zero.
+ </entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_AUTOBRIGHTNESS</constant></entry>
+ <entry>boolean</entry>
+ <entry>Enable Automatic Brightness.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_ROTATE</constant></entry>
+ <entry>integer</entry>
+ <entry>Rotates the image by specified angle. Common angles are 90,
+ 270 and 180. Rotating the image to 90 and 270 will reverse the height
+ and width of the display window. It is necessary to set the new height and
+ width of the picture using the &VIDIOC-S-FMT; ioctl according to
+ the rotation angle selected.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_BG_COLOR</constant></entry>
+ <entry>integer</entry>
+ <entry>Sets the background color on the current output device.
+ Background color needs to be specified in the RGB24 format. The
+ supplied 32 bit value is interpreted as bits 0-7 Red color information,
+ bits 8-15 Green color information, bits 16-23 Blue color
+ information and bits 24-31 must be zero.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_ILLUMINATORS_1</constant>
+ <constant>V4L2_CID_ILLUMINATORS_2</constant></entry>
+ <entry>boolean</entry>
+ <entry>Switch on or off the illuminator 1 or 2 of the device
+ (usually a microscope).</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_MIN_BUFFERS_FOR_CAPTURE</constant></entry>
+ <entry>integer</entry>
+ <entry>This is a read-only control that can be read by the application
+and used as a hint to determine the number of CAPTURE buffers to pass to REQBUFS.
+The value is the minimum number of CAPTURE buffers that is necessary for hardware
+to work.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_MIN_BUFFERS_FOR_OUTPUT</constant></entry>
+ <entry>integer</entry>
+ <entry>This is a read-only control that can be read by the application
+and used as a hint to determine the number of OUTPUT buffers to pass to REQBUFS.
+The value is the minimum number of OUTPUT buffers that is necessary for hardware
+to work.</entry>
+ </row>
+ <row id="v4l2-alpha-component">
+ <entry><constant>V4L2_CID_ALPHA_COMPONENT</constant></entry>
+ <entry>integer</entry>
+ <entry>Sets the alpha color component. When a capture device (or
+ capture queue of a mem-to-mem device) produces a frame format that
+ includes an alpha component
+ (e.g. <link linkend="rgb-formats">packed RGB image formats</link>)
+ and the alpha value is not defined by the device or the mem-to-mem
+ input data this control lets you select the alpha component value of
+ all pixels. When an output device (or output queue of a mem-to-mem
+ device) consumes a frame format that doesn't include an alpha
+ component and the device supports alpha channel processing this
+ control lets you set the alpha component value of all pixels for
+ further processing in the device.
+ </entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_LASTP1</constant></entry>
+ <entry></entry>
+ <entry>End of the predefined control IDs (currently
+ <constant>V4L2_CID_ALPHA_COMPONENT</constant> + 1).</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_PRIVATE_BASE</constant></entry>
+ <entry></entry>
+ <entry>ID of the first custom (driver specific) control.
+Applications depending on particular custom controls should check the
+driver name and version, see <xref linkend="querycap" />.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <para>Applications can enumerate the available controls with the
+&VIDIOC-QUERYCTRL; and &VIDIOC-QUERYMENU; ioctls, get and set a
+control value with the &VIDIOC-G-CTRL; and &VIDIOC-S-CTRL; ioctls.
+Drivers must implement <constant>VIDIOC_QUERYCTRL</constant>,
+<constant>VIDIOC_G_CTRL</constant> and
+<constant>VIDIOC_S_CTRL</constant> when the device has one or more
+controls, <constant>VIDIOC_QUERYMENU</constant> when it has one or
+more menu type controls.</para>
+
+ <example id="enum_all_controls">
+ <title>Enumerating all user controls</title>
+
+ <programlisting>
+&v4l2-queryctrl; queryctrl;
+&v4l2-querymenu; querymenu;
+
+static void enumerate_menu(void)
+{
+ printf(" Menu items:\n");
+
+ memset(&amp;querymenu, 0, sizeof(querymenu));
+ querymenu.id = queryctrl.id;
+
+ for (querymenu.index = queryctrl.minimum;
+ querymenu.index &lt;= queryctrl.maximum;
+ querymenu.index++) {
+ if (0 == ioctl(fd, &VIDIOC-QUERYMENU;, &amp;querymenu)) {
+ printf(" %s\n", querymenu.name);
+ }
+ }
+}
+
+memset(&amp;queryctrl, 0, sizeof(queryctrl));
+
+for (queryctrl.id = V4L2_CID_BASE;
+ queryctrl.id &lt; V4L2_CID_LASTP1;
+ queryctrl.id++) {
+ if (0 == ioctl(fd, &VIDIOC-QUERYCTRL;, &amp;queryctrl)) {
+ if (queryctrl.flags &amp; V4L2_CTRL_FLAG_DISABLED)
+ continue;
+
+ printf("Control %s\n", queryctrl.name);
+
+ if (queryctrl.type == V4L2_CTRL_TYPE_MENU)
+ enumerate_menu();
+ } else {
+ if (errno == EINVAL)
+ continue;
+
+ perror("VIDIOC_QUERYCTRL");
+ exit(EXIT_FAILURE);
+ }
+}
+
+for (queryctrl.id = V4L2_CID_PRIVATE_BASE;;
+ queryctrl.id++) {
+ if (0 == ioctl(fd, &VIDIOC-QUERYCTRL;, &amp;queryctrl)) {
+ if (queryctrl.flags &amp; V4L2_CTRL_FLAG_DISABLED)
+ continue;
+
+ printf("Control %s\n", queryctrl.name);
+
+ if (queryctrl.type == V4L2_CTRL_TYPE_MENU)
+ enumerate_menu();
+ } else {
+ if (errno == EINVAL)
+ break;
+
+ perror("VIDIOC_QUERYCTRL");
+ exit(EXIT_FAILURE);
+ }
+}
+</programlisting>
+ </example>
+
+ <example>
+ <title>Enumerating all user controls (alternative)</title>
+ <programlisting>
+memset(&amp;queryctrl, 0, sizeof(queryctrl));
+
+queryctrl.id = V4L2_CTRL_CLASS_USER | V4L2_CTRL_FLAG_NEXT_CTRL;
+while (0 == ioctl(fd, &VIDIOC-QUERYCTRL;, &amp;queryctrl)) {
+ if (V4L2_CTRL_ID2CLASS(queryctrl.id) != V4L2_CTRL_CLASS_USER)
+ break;
+ if (queryctrl.flags &amp; V4L2_CTRL_FLAG_DISABLED)
+ continue;
+
+ printf("Control %s\n", queryctrl.name);
+
+ if (queryctrl.type == V4L2_CTRL_TYPE_MENU)
+ enumerate_menu();
+
+ queryctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
+}
+if (errno != EINVAL) {
+ perror("VIDIOC_QUERYCTRL");
+ exit(EXIT_FAILURE);
+}
+</programlisting>
+ </example>
+
+ <example>
+ <title>Changing controls</title>
+
+ <programlisting>
+&v4l2-queryctrl; queryctrl;
+&v4l2-control; control;
+
+memset(&amp;queryctrl, 0, sizeof(queryctrl));
+queryctrl.id = V4L2_CID_BRIGHTNESS;
+
+if (-1 == ioctl(fd, &VIDIOC-QUERYCTRL;, &amp;queryctrl)) {
+ if (errno != EINVAL) {
+ perror("VIDIOC_QUERYCTRL");
+ exit(EXIT_FAILURE);
+ } else {
+ printf("V4L2_CID_BRIGHTNESS is not supported\n");
+ }
+} else if (queryctrl.flags &amp; V4L2_CTRL_FLAG_DISABLED) {
+ printf("V4L2_CID_BRIGHTNESS is not supported\n");
+} else {
+ memset(&amp;control, 0, sizeof (control));
+ control.id = V4L2_CID_BRIGHTNESS;
+ control.value = queryctrl.default_value;
+
+ if (-1 == ioctl(fd, &VIDIOC-S-CTRL;, &amp;control)) {
+ perror("VIDIOC_S_CTRL");
+ exit(EXIT_FAILURE);
+ }
+}
+
+memset(&amp;control, 0, sizeof(control));
+control.id = V4L2_CID_CONTRAST;
+
+if (0 == ioctl(fd, &VIDIOC-G-CTRL;, &amp;control)) {
+ control.value += 1;
+
+ /* The driver may clamp the value or return ERANGE, ignored here */
+
+ if (-1 == ioctl(fd, &VIDIOC-S-CTRL;, &amp;control)
+ &amp;&amp; errno != ERANGE) {
+ perror("VIDIOC_S_CTRL");
+ exit(EXIT_FAILURE);
+ }
+/* Ignore if V4L2_CID_CONTRAST is unsupported */
+} else if (errno != EINVAL) {
+ perror("VIDIOC_G_CTRL");
+ exit(EXIT_FAILURE);
+}
+
+control.id = V4L2_CID_AUDIO_MUTE;
+control.value = 1; /* silence */
+
+/* Errors ignored */
+ioctl(fd, VIDIOC_S_CTRL, &amp;control);
+</programlisting>
+ </example>
+ </section>
+
+ <section id="extended-controls">
+ <title>Extended Controls</title>
+
+ <section>
+ <title>Introduction</title>
+
+ <para>The control mechanism as originally designed was meant
+to be used for user settings (brightness, saturation, etc). However,
+it turned out to be a very useful model for implementing more
+complicated driver APIs where each driver implements only a subset of
+a larger API.</para>
+
+ <para>The MPEG encoding API was the driving force behind
+designing and implementing this extended control mechanism: the MPEG
+standard is quite large and the currently supported hardware MPEG
+encoders each only implement a subset of this standard. Further more,
+many parameters relating to how the video is encoded into an MPEG
+stream are specific to the MPEG encoding chip since the MPEG standard
+only defines the format of the resulting MPEG stream, not how the
+video is actually encoded into that format.</para>
+
+ <para>Unfortunately, the original control API lacked some
+features needed for these new uses and so it was extended into the
+(not terribly originally named) extended control API.</para>
+
+ <para>Even though the MPEG encoding API was the first effort
+to use the Extended Control API, nowadays there are also other classes
+of Extended Controls, such as Camera Controls and FM Transmitter Controls.
+The Extended Controls API as well as all Extended Controls classes are
+described in the following text.</para>
+ </section>
+
+ <section>
+ <title>The Extended Control API</title>
+
+ <para>Three new ioctls are available: &VIDIOC-G-EXT-CTRLS;,
+&VIDIOC-S-EXT-CTRLS; and &VIDIOC-TRY-EXT-CTRLS;. These ioctls act on
+arrays of controls (as opposed to the &VIDIOC-G-CTRL; and
+&VIDIOC-S-CTRL; ioctls that act on a single control). This is needed
+since it is often required to atomically change several controls at
+once.</para>
+
+ <para>Each of the new ioctls expects a pointer to a
+&v4l2-ext-controls;. This structure contains a pointer to the control
+array, a count of the number of controls in that array and a control
+class. Control classes are used to group similar controls into a
+single class. For example, control class
+<constant>V4L2_CTRL_CLASS_USER</constant> contains all user controls
+(&ie; all controls that can also be set using the old
+<constant>VIDIOC_S_CTRL</constant> ioctl). Control class
+<constant>V4L2_CTRL_CLASS_MPEG</constant> contains all controls
+relating to MPEG encoding, etc.</para>
+
+ <para>All controls in the control array must belong to the
+specified control class. An error is returned if this is not the
+case.</para>
+
+ <para>It is also possible to use an empty control array (count
+== 0) to check whether the specified control class is
+supported.</para>
+
+ <para>The control array is a &v4l2-ext-control; array. The
+<structname>v4l2_ext_control</structname> structure is very similar to
+&v4l2-control;, except for the fact that it also allows for 64-bit
+values and pointers to be passed.</para>
+
+ <para>Since the &v4l2-ext-control; supports pointers it is now
+also possible to have controls with compound types such as N-dimensional arrays
+and/or structures. You need to specify the <constant>V4L2_CTRL_FLAG_NEXT_COMPOUND</constant>
+when enumerating controls to actually be able to see such compound controls.
+In other words, these controls with compound types should only be used
+programmatically.</para>
+
+ <para>Since such compound controls need to expose more information
+about themselves than is possible with &VIDIOC-QUERYCTRL; the
+&VIDIOC-QUERY-EXT-CTRL; ioctl was added. In particular, this ioctl gives
+the dimensions of the N-dimensional array if this control consists of more than
+one element.</para>
+
+ <para>It is important to realize that due to the flexibility of
+controls it is necessary to check whether the control you want to set
+actually is supported in the driver and what the valid range of values
+is. So use the &VIDIOC-QUERYCTRL; (or &VIDIOC-QUERY-EXT-CTRL;) and
+&VIDIOC-QUERYMENU; ioctls to check this. Also note that it is possible
+that some of the menu indices in a control of type
+<constant>V4L2_CTRL_TYPE_MENU</constant> may not be supported
+(<constant>VIDIOC_QUERYMENU</constant> will return an error). A good
+example is the list of supported MPEG audio bitrates. Some drivers only
+support one or two bitrates, others support a wider range.</para>
+
+ <para>
+ All controls use machine endianness.
+ </para>
+ </section>
+
+ <section>
+ <title>Enumerating Extended Controls</title>
+
+ <para>The recommended way to enumerate over the extended
+controls is by using &VIDIOC-QUERYCTRL; in combination with the
+<constant>V4L2_CTRL_FLAG_NEXT_CTRL</constant> flag:</para>
+
+ <informalexample>
+ <programlisting>
+&v4l2-queryctrl; qctrl;
+
+qctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL;
+while (0 == ioctl (fd, &VIDIOC-QUERYCTRL;, &amp;qctrl)) {
+ /* ... */
+ qctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
+}
+</programlisting>
+ </informalexample>
+
+ <para>The initial control ID is set to 0 ORed with the
+<constant>V4L2_CTRL_FLAG_NEXT_CTRL</constant> flag. The
+<constant>VIDIOC_QUERYCTRL</constant> ioctl will return the first
+control with a higher ID than the specified one. When no such controls
+are found an error is returned.</para>
+
+ <para>If you want to get all controls within a specific control
+class, then you can set the initial
+<structfield>qctrl.id</structfield> value to the control class and add
+an extra check to break out of the loop when a control of another
+control class is found:</para>
+
+ <informalexample>
+ <programlisting>
+qctrl.id = V4L2_CTRL_CLASS_MPEG | V4L2_CTRL_FLAG_NEXT_CTRL;
+while (0 == ioctl(fd, &VIDIOC-QUERYCTRL;, &amp;qctrl)) {
+ if (V4L2_CTRL_ID2CLASS(qctrl.id) != V4L2_CTRL_CLASS_MPEG)
+ break;
+ /* ... */
+ qctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
+}
+</programlisting>
+ </informalexample>
+
+ <para>The 32-bit <structfield>qctrl.id</structfield> value is
+subdivided into three bit ranges: the top 4 bits are reserved for
+flags (&eg; <constant>V4L2_CTRL_FLAG_NEXT_CTRL</constant>) and are not
+actually part of the ID. The remaining 28 bits form the control ID, of
+which the most significant 12 bits define the control class and the
+least significant 16 bits identify the control within the control
+class. It is guaranteed that these last 16 bits are always non-zero
+for controls. The range of 0x1000 and up are reserved for
+driver-specific controls. The macro
+<constant>V4L2_CTRL_ID2CLASS(id)</constant> returns the control class
+ID based on a control ID.</para>
+
+ <para>If the driver does not support extended controls, then
+<constant>VIDIOC_QUERYCTRL</constant> will fail when used in
+combination with <constant>V4L2_CTRL_FLAG_NEXT_CTRL</constant>. In
+that case the old method of enumerating control should be used (see
+<xref linkend="enum_all_controls" />). But if it is supported, then it is guaranteed to enumerate over
+all controls, including driver-private controls.</para>
+ </section>
+
+ <section>
+ <title>Creating Control Panels</title>
+
+ <para>It is possible to create control panels for a graphical
+user interface where the user can select the various controls.
+Basically you will have to iterate over all controls using the method
+described above. Each control class starts with a control of type
+<constant>V4L2_CTRL_TYPE_CTRL_CLASS</constant>.
+<constant>VIDIOC_QUERYCTRL</constant> will return the name of this
+control class which can be used as the title of a tab page within a
+control panel.</para>
+
+ <para>The flags field of &v4l2-queryctrl; also contains hints on
+the behavior of the control. See the &VIDIOC-QUERYCTRL; documentation
+for more details.</para>
+ </section>
+
+ <section id="mpeg-controls">
+ <title>Codec Control Reference</title>
+
+ <para>Below all controls within the Codec control class are
+described. First the generic controls, then controls specific for
+certain hardware.</para>
+
+ <para>Note: These controls are applicable to all codecs and
+not just MPEG. The defines are prefixed with V4L2_CID_MPEG/V4L2_MPEG
+as the controls were originally made for MPEG codecs and later
+extended to cover all encoding formats.</para>
+
+ <section>
+ <title>Generic Codec Controls</title>
+
+ <table pgwide="1" frame="none" id="mpeg-control-id">
+ <title>Codec Control IDs</title>
+ <tgroup cols="4">
+ <colspec colname="c1" colwidth="1*" />
+ <colspec colname="c2" colwidth="6*" />
+ <colspec colname="c3" colwidth="2*" />
+ <colspec colname="c4" colwidth="6*" />
+ <spanspec namest="c1" nameend="c2" spanname="id" />
+ <spanspec namest="c2" nameend="c4" spanname="descr" />
+ <thead>
+ <row>
+ <entry spanname="id" align="left">ID</entry>
+ <entry align="left">Type</entry>
+ </row><row rowsep="1"><entry spanname="descr" align="left">Description</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_CLASS</constant>&nbsp;</entry>
+ <entry>class</entry>
+ </row><row><entry spanname="descr">The Codec class
+descriptor. Calling &VIDIOC-QUERYCTRL; for this control will return a
+description of this control class. This description can be used as the
+caption of a Tab page in a GUI, for example.</entry>
+ </row>
+ <row><entry></entry></row>
+ <row id="v4l2-mpeg-stream-type">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_STREAM_TYPE</constant>&nbsp;</entry>
+ <entry>enum&nbsp;v4l2_mpeg_stream_type</entry>
+ </row><row><entry spanname="descr">The MPEG-1, -2 or -4
+output stream type. One cannot assume anything here. Each hardware
+MPEG encoder tends to support different subsets of the available MPEG
+stream types. This control is specific to multiplexed MPEG streams.
+The currently defined stream types are:</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_MPEG_STREAM_TYPE_MPEG2_PS</constant>&nbsp;</entry>
+ <entry>MPEG-2 program stream</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_STREAM_TYPE_MPEG2_TS</constant>&nbsp;</entry>
+ <entry>MPEG-2 transport stream</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_STREAM_TYPE_MPEG1_SS</constant>&nbsp;</entry>
+ <entry>MPEG-1 system stream</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_STREAM_TYPE_MPEG2_DVD</constant>&nbsp;</entry>
+ <entry>MPEG-2 DVD-compatible stream</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_STREAM_TYPE_MPEG1_VCD</constant>&nbsp;</entry>
+ <entry>MPEG-1 VCD-compatible stream</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_STREAM_TYPE_MPEG2_SVCD</constant>&nbsp;</entry>
+ <entry>MPEG-2 SVCD-compatible stream</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_STREAM_PID_PMT</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row><row><entry spanname="descr">Program Map Table
+Packet ID for the MPEG transport stream (default 16)</entry>
+ </row>
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_STREAM_PID_AUDIO</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row><row><entry spanname="descr">Audio Packet ID for
+the MPEG transport stream (default 256)</entry>
+ </row>
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_STREAM_PID_VIDEO</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row><row><entry spanname="descr">Video Packet ID for
+the MPEG transport stream (default 260)</entry>
+ </row>
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_STREAM_PID_PCR</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row><row><entry spanname="descr">Packet ID for the
+MPEG transport stream carrying PCR fields (default 259)</entry>
+ </row>
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_STREAM_PES_ID_AUDIO</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row><row><entry spanname="descr">Audio ID for MPEG
+PES</entry>
+ </row>
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_STREAM_PES_ID_VIDEO</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row><row><entry spanname="descr">Video ID for MPEG
+PES</entry>
+ </row>
+ <row><entry></entry></row>
+ <row id="v4l2-mpeg-stream-vbi-fmt">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_STREAM_VBI_FMT</constant>&nbsp;</entry>
+ <entry>enum&nbsp;v4l2_mpeg_stream_vbi_fmt</entry>
+ </row><row><entry spanname="descr">Some cards can embed
+VBI data (&eg; Closed Caption, Teletext) into the MPEG stream. This
+control selects whether VBI data should be embedded, and if so, what
+embedding method should be used. The list of possible VBI formats
+depends on the driver. The currently defined VBI format types
+are:</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_MPEG_STREAM_VBI_FMT_NONE</constant>&nbsp;</entry>
+ <entry>No VBI in the MPEG stream</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_STREAM_VBI_FMT_IVTV</constant>&nbsp;</entry>
+ <entry>VBI in private packets, IVTV format (documented
+in the kernel sources in the file <filename>Documentation/video4linux/cx2341x/README.vbi</filename>)</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+ <row><entry></entry></row>
+ <row id="v4l2-mpeg-audio-sampling-freq">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ</constant>&nbsp;</entry>
+ <entry>enum&nbsp;v4l2_mpeg_audio_sampling_freq</entry>
+ </row><row><entry spanname="descr">MPEG Audio sampling
+frequency. Possible values are:</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_SAMPLING_FREQ_44100</constant>&nbsp;</entry>
+ <entry>44.1 kHz</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000</constant>&nbsp;</entry>
+ <entry>48 kHz</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_SAMPLING_FREQ_32000</constant>&nbsp;</entry>
+ <entry>32 kHz</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+ <row><entry></entry></row>
+ <row id="v4l2-mpeg-audio-encoding">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_AUDIO_ENCODING</constant>&nbsp;</entry>
+ <entry>enum&nbsp;v4l2_mpeg_audio_encoding</entry>
+ </row><row><entry spanname="descr">MPEG Audio encoding.
+This control is specific to multiplexed MPEG streams.
+Possible values are:</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_ENCODING_LAYER_1</constant>&nbsp;</entry>
+ <entry>MPEG-1/2 Layer I encoding</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_ENCODING_LAYER_2</constant>&nbsp;</entry>
+ <entry>MPEG-1/2 Layer II encoding</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_ENCODING_LAYER_3</constant>&nbsp;</entry>
+ <entry>MPEG-1/2 Layer III encoding</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_ENCODING_AAC</constant>&nbsp;</entry>
+ <entry>MPEG-2/4 AAC (Advanced Audio Coding)</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_ENCODING_AC3</constant>&nbsp;</entry>
+ <entry>AC-3 aka ATSC A/52 encoding</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+ <row><entry></entry></row>
+ <row id="v4l2-mpeg-audio-l1-bitrate">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_AUDIO_L1_BITRATE</constant>&nbsp;</entry>
+ <entry>enum&nbsp;v4l2_mpeg_audio_l1_bitrate</entry>
+ </row><row><entry spanname="descr">MPEG-1/2 Layer I bitrate.
+Possible values are:</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_L1_BITRATE_32K</constant>&nbsp;</entry>
+ <entry>32 kbit/s</entry></row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_L1_BITRATE_64K</constant>&nbsp;</entry>
+ <entry>64 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_L1_BITRATE_96K</constant>&nbsp;</entry>
+ <entry>96 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_L1_BITRATE_128K</constant>&nbsp;</entry>
+ <entry>128 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_L1_BITRATE_160K</constant>&nbsp;</entry>
+ <entry>160 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_L1_BITRATE_192K</constant>&nbsp;</entry>
+ <entry>192 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_L1_BITRATE_224K</constant>&nbsp;</entry>
+ <entry>224 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_L1_BITRATE_256K</constant>&nbsp;</entry>
+ <entry>256 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_L1_BITRATE_288K</constant>&nbsp;</entry>
+ <entry>288 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_L1_BITRATE_320K</constant>&nbsp;</entry>
+ <entry>320 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_L1_BITRATE_352K</constant>&nbsp;</entry>
+ <entry>352 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_L1_BITRATE_384K</constant>&nbsp;</entry>
+ <entry>384 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_L1_BITRATE_416K</constant>&nbsp;</entry>
+ <entry>416 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_L1_BITRATE_448K</constant>&nbsp;</entry>
+ <entry>448 kbit/s</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+ <row><entry></entry></row>
+ <row id="v4l2-mpeg-audio-l2-bitrate">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_AUDIO_L2_BITRATE</constant>&nbsp;</entry>
+ <entry>enum&nbsp;v4l2_mpeg_audio_l2_bitrate</entry>
+ </row><row><entry spanname="descr">MPEG-1/2 Layer II bitrate.
+Possible values are:</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_L2_BITRATE_32K</constant>&nbsp;</entry>
+ <entry>32 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_L2_BITRATE_48K</constant>&nbsp;</entry>
+ <entry>48 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_L2_BITRATE_56K</constant>&nbsp;</entry>
+ <entry>56 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_L2_BITRATE_64K</constant>&nbsp;</entry>
+ <entry>64 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_L2_BITRATE_80K</constant>&nbsp;</entry>
+ <entry>80 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_L2_BITRATE_96K</constant>&nbsp;</entry>
+ <entry>96 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_L2_BITRATE_112K</constant>&nbsp;</entry>
+ <entry>112 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_L2_BITRATE_128K</constant>&nbsp;</entry>
+ <entry>128 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_L2_BITRATE_160K</constant>&nbsp;</entry>
+ <entry>160 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_L2_BITRATE_192K</constant>&nbsp;</entry>
+ <entry>192 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_L2_BITRATE_224K</constant>&nbsp;</entry>
+ <entry>224 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_L2_BITRATE_256K</constant>&nbsp;</entry>
+ <entry>256 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_L2_BITRATE_320K</constant>&nbsp;</entry>
+ <entry>320 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_L2_BITRATE_384K</constant>&nbsp;</entry>
+ <entry>384 kbit/s</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+ <row><entry></entry></row>
+ <row id="v4l2-mpeg-audio-l3-bitrate">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_AUDIO_L3_BITRATE</constant>&nbsp;</entry>
+ <entry>enum&nbsp;v4l2_mpeg_audio_l3_bitrate</entry>
+ </row><row><entry spanname="descr">MPEG-1/2 Layer III bitrate.
+Possible values are:</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_L3_BITRATE_32K</constant>&nbsp;</entry>
+ <entry>32 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_L3_BITRATE_40K</constant>&nbsp;</entry>
+ <entry>40 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_L3_BITRATE_48K</constant>&nbsp;</entry>
+ <entry>48 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_L3_BITRATE_56K</constant>&nbsp;</entry>
+ <entry>56 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_L3_BITRATE_64K</constant>&nbsp;</entry>
+ <entry>64 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_L3_BITRATE_80K</constant>&nbsp;</entry>
+ <entry>80 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_L3_BITRATE_96K</constant>&nbsp;</entry>
+ <entry>96 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_L3_BITRATE_112K</constant>&nbsp;</entry>
+ <entry>112 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_L3_BITRATE_128K</constant>&nbsp;</entry>
+ <entry>128 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_L3_BITRATE_160K</constant>&nbsp;</entry>
+ <entry>160 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_L3_BITRATE_192K</constant>&nbsp;</entry>
+ <entry>192 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_L3_BITRATE_224K</constant>&nbsp;</entry>
+ <entry>224 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_L3_BITRATE_256K</constant>&nbsp;</entry>
+ <entry>256 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_L3_BITRATE_320K</constant>&nbsp;</entry>
+ <entry>320 kbit/s</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_AUDIO_AAC_BITRATE</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row><row><entry spanname="descr">AAC bitrate in bits per second.</entry>
+ </row>
+ <row><entry></entry></row>
+ <row id="v4l2-mpeg-audio-ac3-bitrate">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_AUDIO_AC3_BITRATE</constant>&nbsp;</entry>
+ <entry>enum&nbsp;v4l2_mpeg_audio_ac3_bitrate</entry>
+ </row><row><entry spanname="descr">AC-3 bitrate.
+Possible values are:</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_AC3_BITRATE_32K</constant>&nbsp;</entry>
+ <entry>32 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_AC3_BITRATE_40K</constant>&nbsp;</entry>
+ <entry>40 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_AC3_BITRATE_48K</constant>&nbsp;</entry>
+ <entry>48 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_AC3_BITRATE_56K</constant>&nbsp;</entry>
+ <entry>56 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_AC3_BITRATE_64K</constant>&nbsp;</entry>
+ <entry>64 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_AC3_BITRATE_80K</constant>&nbsp;</entry>
+ <entry>80 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_AC3_BITRATE_96K</constant>&nbsp;</entry>
+ <entry>96 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_AC3_BITRATE_112K</constant>&nbsp;</entry>
+ <entry>112 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_AC3_BITRATE_128K</constant>&nbsp;</entry>
+ <entry>128 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_AC3_BITRATE_160K</constant>&nbsp;</entry>
+ <entry>160 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_AC3_BITRATE_192K</constant>&nbsp;</entry>
+ <entry>192 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_AC3_BITRATE_224K</constant>&nbsp;</entry>
+ <entry>224 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_AC3_BITRATE_256K</constant>&nbsp;</entry>
+ <entry>256 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_AC3_BITRATE_320K</constant>&nbsp;</entry>
+ <entry>320 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_AC3_BITRATE_384K</constant>&nbsp;</entry>
+ <entry>384 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_AC3_BITRATE_448K</constant>&nbsp;</entry>
+ <entry>448 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_AC3_BITRATE_512K</constant>&nbsp;</entry>
+ <entry>512 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_AC3_BITRATE_576K</constant>&nbsp;</entry>
+ <entry>576 kbit/s</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_AC3_BITRATE_640K</constant>&nbsp;</entry>
+ <entry>640 kbit/s</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+ <row><entry></entry></row>
+ <row id="v4l2-mpeg-audio-mode">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_AUDIO_MODE</constant>&nbsp;</entry>
+ <entry>enum&nbsp;v4l2_mpeg_audio_mode</entry>
+ </row><row><entry spanname="descr">MPEG Audio mode.
+Possible values are:</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_MODE_STEREO</constant>&nbsp;</entry>
+ <entry>Stereo</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_MODE_JOINT_STEREO</constant>&nbsp;</entry>
+ <entry>Joint Stereo</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_MODE_DUAL</constant>&nbsp;</entry>
+ <entry>Bilingual</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_MODE_MONO</constant>&nbsp;</entry>
+ <entry>Mono</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+ <row><entry></entry></row>
+ <row id="v4l2-mpeg-audio-mode-extension">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_AUDIO_MODE_EXTENSION</constant>&nbsp;</entry>
+ <entry>enum&nbsp;v4l2_mpeg_audio_mode_extension</entry>
+ </row><row><entry spanname="descr">Joint Stereo
+audio mode extension. In Layer I and II they indicate which subbands
+are in intensity stereo. All other subbands are coded in stereo. Layer
+III is not (yet) supported. Possible values
+are:</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_MODE_EXTENSION_BOUND_4</constant>&nbsp;</entry>
+ <entry>Subbands 4-31 in intensity stereo</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_MODE_EXTENSION_BOUND_8</constant>&nbsp;</entry>
+ <entry>Subbands 8-31 in intensity stereo</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_MODE_EXTENSION_BOUND_12</constant>&nbsp;</entry>
+ <entry>Subbands 12-31 in intensity stereo</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_MODE_EXTENSION_BOUND_16</constant>&nbsp;</entry>
+ <entry>Subbands 16-31 in intensity stereo</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+ <row><entry></entry></row>
+ <row id="v4l2-mpeg-audio-emphasis">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_AUDIO_EMPHASIS</constant>&nbsp;</entry>
+ <entry>enum&nbsp;v4l2_mpeg_audio_emphasis</entry>
+ </row><row><entry spanname="descr">Audio Emphasis.
+Possible values are:</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_EMPHASIS_NONE</constant>&nbsp;</entry>
+ <entry>None</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_EMPHASIS_50_DIV_15_uS</constant>&nbsp;</entry>
+ <entry>50/15 microsecond emphasis</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_EMPHASIS_CCITT_J17</constant>&nbsp;</entry>
+ <entry>CCITT J.17</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+ <row><entry></entry></row>
+ <row id="v4l2-mpeg-audio-crc">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_AUDIO_CRC</constant>&nbsp;</entry>
+ <entry>enum&nbsp;v4l2_mpeg_audio_crc</entry>
+ </row><row><entry spanname="descr">CRC method. Possible
+values are:</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_CRC_NONE</constant>&nbsp;</entry>
+ <entry>None</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_CRC_CRC16</constant>&nbsp;</entry>
+ <entry>16 bit parity check</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_AUDIO_MUTE</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row><row><entry spanname="descr">Mutes the audio when
+capturing. This is not done by muting audio hardware, which can still
+produce a slight hiss, but in the encoder itself, guaranteeing a fixed
+and reproducible audio bitstream. 0 = unmuted, 1 = muted.</entry>
+ </row>
+ <row><entry></entry></row>
+ <row id="v4l2-mpeg-audio-dec-playback">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK</constant>&nbsp;</entry>
+ <entry>enum&nbsp;v4l2_mpeg_audio_dec_playback</entry>
+ </row><row><entry spanname="descr">Determines how monolingual audio should be played back.
+Possible values are:</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_DEC_PLAYBACK_AUTO</constant>&nbsp;</entry>
+ <entry>Automatically determines the best playback mode.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_DEC_PLAYBACK_STEREO</constant>&nbsp;</entry>
+ <entry>Stereo playback.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_DEC_PLAYBACK_LEFT</constant>&nbsp;</entry>
+ <entry>Left channel playback.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_DEC_PLAYBACK_RIGHT</constant>&nbsp;</entry>
+ <entry>Right channel playback.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_DEC_PLAYBACK_MONO</constant>&nbsp;</entry>
+ <entry>Mono playback.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_AUDIO_DEC_PLAYBACK_SWAPPED_STEREO</constant>&nbsp;</entry>
+ <entry>Stereo playback with swapped left and right channels.</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+ <row><entry></entry></row>
+ <row id="v4l2-mpeg-audio-dec-multilingual-playback">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK</constant>&nbsp;</entry>
+ <entry>enum&nbsp;v4l2_mpeg_audio_dec_playback</entry>
+ </row><row><entry spanname="descr">Determines how multilingual audio should be played back.</entry>
+ </row>
+ <row><entry></entry></row>
+ <row id="v4l2-mpeg-video-encoding">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_ENCODING</constant>&nbsp;</entry>
+ <entry>enum&nbsp;v4l2_mpeg_video_encoding</entry>
+ </row><row><entry spanname="descr">MPEG Video encoding
+method. This control is specific to multiplexed MPEG streams.
+Possible values are:</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_ENCODING_MPEG_1</constant>&nbsp;</entry>
+ <entry>MPEG-1 Video encoding</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_ENCODING_MPEG_2</constant>&nbsp;</entry>
+ <entry>MPEG-2 Video encoding</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_ENCODING_MPEG_4_AVC</constant>&nbsp;</entry>
+ <entry>MPEG-4 AVC (H.264) Video encoding</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+ <row><entry></entry></row>
+ <row id="v4l2-mpeg-video-aspect">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_ASPECT</constant>&nbsp;</entry>
+ <entry>enum&nbsp;v4l2_mpeg_video_aspect</entry>
+ </row><row><entry spanname="descr">Video aspect.
+Possible values are:</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_ASPECT_1x1</constant>&nbsp;</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_ASPECT_4x3</constant>&nbsp;</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_ASPECT_16x9</constant>&nbsp;</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_ASPECT_221x100</constant>&nbsp;</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_B_FRAMES</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row><row><entry spanname="descr">Number of B-Frames
+(default 2)</entry>
+ </row>
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_GOP_SIZE</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row><row><entry spanname="descr">GOP size (default
+12)</entry>
+ </row>
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_GOP_CLOSURE</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row><row><entry spanname="descr">GOP closure (default
+1)</entry>
+ </row>
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_PULLDOWN</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row><row><entry spanname="descr">Enable 3:2 pulldown
+(default 0)</entry>
+ </row>
+ <row><entry></entry></row>
+ <row id="v4l2-mpeg-video-bitrate-mode">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_BITRATE_MODE</constant>&nbsp;</entry>
+ <entry>enum&nbsp;v4l2_mpeg_video_bitrate_mode</entry>
+ </row><row><entry spanname="descr">Video bitrate mode.
+Possible values are:</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_BITRATE_MODE_VBR</constant>&nbsp;</entry>
+ <entry>Variable bitrate</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_BITRATE_MODE_CBR</constant>&nbsp;</entry>
+ <entry>Constant bitrate</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_BITRATE</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row><row><entry spanname="descr">Video bitrate in bits
+per second.</entry>
+ </row>
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_BITRATE_PEAK</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row><row><entry spanname="descr">Peak video bitrate in
+bits per second. Must be larger or equal to the average video bitrate.
+It is ignored if the video bitrate mode is set to constant
+bitrate.</entry>
+ </row>
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_TEMPORAL_DECIMATION</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row><row><entry spanname="descr">For every captured
+frame, skip this many subsequent frames (default 0).</entry>
+ </row>
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_MUTE</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row>
+ <row><entry spanname="descr">"Mutes" the video to a
+fixed color when capturing. This is useful for testing, to produce a
+fixed video bitstream. 0 = unmuted, 1 = muted.</entry>
+ </row>
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_MUTE_YUV</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row><row><entry spanname="descr">Sets the "mute" color
+of the video. The supplied 32-bit integer is interpreted as follows (bit
+0 = least significant bit):</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry>Bit 0:7</entry>
+ <entry>V chrominance information</entry>
+ </row>
+ <row>
+ <entry>Bit 8:15</entry>
+ <entry>U chrominance information</entry>
+ </row>
+ <row>
+ <entry>Bit 16:23</entry>
+ <entry>Y luminance information</entry>
+ </row>
+ <row>
+ <entry>Bit 24:31</entry>
+ <entry>Must be zero.</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+ <row><entry></entry></row>
+ <row id="v4l2-mpeg-video-dec-pts">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_DEC_PTS</constant>&nbsp;</entry>
+ <entry>integer64</entry>
+ </row><row><entry spanname="descr">This read-only control returns the
+33-bit video Presentation Time Stamp as defined in ITU T-REC-H.222.0 and ISO/IEC 13818-1 of
+the currently displayed frame. This is the same PTS as is used in &VIDIOC-DECODER-CMD;.</entry>
+ </row>
+ <row><entry></entry></row>
+ <row id="v4l2-mpeg-video-dec-frame">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_DEC_FRAME</constant>&nbsp;</entry>
+ <entry>integer64</entry>
+ </row><row><entry spanname="descr">This read-only control returns the
+frame counter of the frame that is currently displayed (decoded). This value is reset to 0 whenever
+the decoder is started.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row>
+ <row><entry spanname="descr">If enabled the decoder expects to receive a single slice per buffer, otherwise
+the decoder expects a single frame in per buffer. Applicable to the decoder, all codecs.
+</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row>
+ <row><entry spanname="descr">Enable writing sample aspect ratio in the Video Usability Information.
+Applicable to the H264 encoder.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row id="v4l2-mpeg-video-h264-vui-sar-idc">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC</constant>&nbsp;</entry>
+ <entry>enum&nbsp;v4l2_mpeg_video_h264_vui_sar_idc</entry>
+ </row>
+ <row><entry spanname="descr">VUI sample aspect ratio indicator for H.264 encoding. The value
+is defined in the table E-1 in the standard. Applicable to the H264 encoder.</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_UNSPECIFIED</constant>&nbsp;</entry>
+ <entry>Unspecified</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_1x1</constant>&nbsp;</entry>
+ <entry>1x1</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_12x11</constant>&nbsp;</entry>
+ <entry>12x11</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_10x11</constant>&nbsp;</entry>
+ <entry>10x11</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_16x11</constant>&nbsp;</entry>
+ <entry>16x11</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_40x33</constant>&nbsp;</entry>
+ <entry>40x33</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_24x11</constant>&nbsp;</entry>
+ <entry>24x11</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_20x11</constant>&nbsp;</entry>
+ <entry>20x11</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_32x11</constant>&nbsp;</entry>
+ <entry>32x11</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_80x33</constant>&nbsp;</entry>
+ <entry>80x33</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_18x11</constant>&nbsp;</entry>
+ <entry>18x11</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_15x11</constant>&nbsp;</entry>
+ <entry>15x11</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_64x33</constant>&nbsp;</entry>
+ <entry>64x33</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_160x99</constant>&nbsp;</entry>
+ <entry>160x99</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_4x3</constant>&nbsp;</entry>
+ <entry>4x3</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_3x2</constant>&nbsp;</entry>
+ <entry>3x2</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_2x1</constant>&nbsp;</entry>
+ <entry>2x1</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_EXTENDED</constant>&nbsp;</entry>
+ <entry>Extended SAR</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_WIDTH</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Extended sample aspect ratio width for H.264 VUI encoding.
+Applicable to the H264 encoder.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_HEIGHT</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Extended sample aspect ratio height for H.264 VUI encoding.
+Applicable to the H264 encoder.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row id="v4l2-mpeg-video-h264-level">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_LEVEL</constant>&nbsp;</entry>
+ <entry>enum&nbsp;v4l2_mpeg_video_h264_level</entry>
+ </row>
+ <row><entry spanname="descr">The level information for the H264 video elementary stream.
+Applicable to the H264 encoder.
+Possible values are:</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_LEVEL_1_0</constant>&nbsp;</entry>
+ <entry>Level 1.0</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_LEVEL_1B</constant>&nbsp;</entry>
+ <entry>Level 1B</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_LEVEL_1_1</constant>&nbsp;</entry>
+ <entry>Level 1.1</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_LEVEL_1_2</constant>&nbsp;</entry>
+ <entry>Level 1.2</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_LEVEL_1_3</constant>&nbsp;</entry>
+ <entry>Level 1.3</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_LEVEL_2_0</constant>&nbsp;</entry>
+ <entry>Level 2.0</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_LEVEL_2_1</constant>&nbsp;</entry>
+ <entry>Level 2.1</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_LEVEL_2_2</constant>&nbsp;</entry>
+ <entry>Level 2.2</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_LEVEL_3_0</constant>&nbsp;</entry>
+ <entry>Level 3.0</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_LEVEL_3_1</constant>&nbsp;</entry>
+ <entry>Level 3.1</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_LEVEL_3_2</constant>&nbsp;</entry>
+ <entry>Level 3.2</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_LEVEL_4_0</constant>&nbsp;</entry>
+ <entry>Level 4.0</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_LEVEL_4_1</constant>&nbsp;</entry>
+ <entry>Level 4.1</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_LEVEL_4_2</constant>&nbsp;</entry>
+ <entry>Level 4.2</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_LEVEL_5_0</constant>&nbsp;</entry>
+ <entry>Level 5.0</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_LEVEL_5_1</constant>&nbsp;</entry>
+ <entry>Level 5.1</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+
+ <row><entry></entry></row>
+ <row id="v4l2-mpeg-video-mpeg4-level">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL</constant>&nbsp;</entry>
+ <entry>enum&nbsp;v4l2_mpeg_video_mpeg4_level</entry>
+ </row>
+ <row><entry spanname="descr">The level information for the MPEG4 elementary stream.
+Applicable to the MPEG4 encoder.
+Possible values are:</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_LEVEL_0</constant>&nbsp;</entry>
+ <entry>Level 0</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_LEVEL_0B</constant>&nbsp;</entry>
+ <entry>Level 0b</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_LEVEL_1</constant>&nbsp;</entry>
+ <entry>Level 1</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_LEVEL_2</constant>&nbsp;</entry>
+ <entry>Level 2</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_LEVEL_3</constant>&nbsp;</entry>
+ <entry>Level 3</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_LEVEL_3B</constant>&nbsp;</entry>
+ <entry>Level 3b</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_LEVEL_4</constant>&nbsp;</entry>
+ <entry>Level 4</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_LEVEL_5</constant>&nbsp;</entry>
+ <entry>Level 5</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+
+ <row><entry></entry></row>
+ <row id="v4l2-mpeg-video-h264-profile">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_PROFILE</constant>&nbsp;</entry>
+ <entry>enum&nbsp;v4l2_mpeg_video_h264_profile</entry>
+ </row>
+ <row><entry spanname="descr">The profile information for H264.
+Applicable to the H264 encoder.
+Possible values are:</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_PROFILE_BASELINE</constant>&nbsp;</entry>
+ <entry>Baseline profile</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_PROFILE_CONSTRAINED_BASELINE</constant>&nbsp;</entry>
+ <entry>Constrained Baseline profile</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_PROFILE_MAIN</constant>&nbsp;</entry>
+ <entry>Main profile</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_PROFILE_EXTENDED</constant>&nbsp;</entry>
+ <entry>Extended profile</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_PROFILE_HIGH</constant>&nbsp;</entry>
+ <entry>High profile</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_10</constant>&nbsp;</entry>
+ <entry>High 10 profile</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_422</constant>&nbsp;</entry>
+ <entry>High 422 profile</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_444_PREDICTIVE</constant>&nbsp;</entry>
+ <entry>High 444 Predictive profile</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_10_INTRA</constant>&nbsp;</entry>
+ <entry>High 10 Intra profile</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_422_INTRA</constant>&nbsp;</entry>
+ <entry>High 422 Intra profile</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_444_INTRA</constant>&nbsp;</entry>
+ <entry>High 444 Intra profile</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_PROFILE_CAVLC_444_INTRA</constant>&nbsp;</entry>
+ <entry>CAVLC 444 Intra profile</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_PROFILE_SCALABLE_BASELINE</constant>&nbsp;</entry>
+ <entry>Scalable Baseline profile</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_PROFILE_SCALABLE_HIGH</constant>&nbsp;</entry>
+ <entry>Scalable High profile</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_PROFILE_SCALABLE_HIGH_INTRA</constant>&nbsp;</entry>
+ <entry>Scalable High Intra profile</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_PROFILE_STEREO_HIGH</constant>&nbsp;</entry>
+ <entry>Stereo High profile</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_PROFILE_MULTIVIEW_HIGH</constant>&nbsp;</entry>
+ <entry>Multiview High profile</entry>
+ </row>
+
+ </tbody>
+ </entrytbl>
+ </row>
+
+ <row><entry></entry></row>
+ <row id="v4l2-mpeg-video-mpeg4-profile">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE</constant>&nbsp;</entry>
+ <entry>enum&nbsp;v4l2_mpeg_video_mpeg4_profile</entry>
+ </row>
+ <row><entry spanname="descr">The profile information for MPEG4.
+Applicable to the MPEG4 encoder.
+Possible values are:</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_PROFILE_SIMPLE</constant>&nbsp;</entry>
+ <entry>Simple profile</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_PROFILE_ADVANCED_SIMPLE</constant>&nbsp;</entry>
+ <entry>Advanced Simple profile</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_PROFILE_CORE</constant>&nbsp;</entry>
+ <entry>Core profile</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_PROFILE_SIMPLE_SCALABLE</constant>&nbsp;</entry>
+ <entry>Simple Scalable profile</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_PROFILE_ADVANCED_CODING_EFFICIENCY</constant>&nbsp;</entry>
+ <entry></entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_MAX_REF_PIC</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">The maximum number of reference pictures used for encoding.
+Applicable to the encoder.
+</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row id="v4l2-mpeg-video-multi-slice-mode">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE</constant>&nbsp;</entry>
+ <entry>enum&nbsp;v4l2_mpeg_video_multi_slice_mode</entry>
+ </row>
+ <row><entry spanname="descr">Determines how the encoder should handle division of frame into slices.
+Applicable to the encoder.
+Possible values are:</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_MULTI_SLICE_MODE_SINGLE</constant>&nbsp;</entry>
+ <entry>Single slice per frame.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_MULTI_SLICE_MODE_MAX_MB</constant>&nbsp;</entry>
+ <entry>Multiple slices with set maximum number of macroblocks per slice.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_MULTI_SLICE_MODE_MAX_BYTES</constant>&nbsp;</entry>
+ <entry>Multiple slice with set maximum size in bytes per slice.</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_MB</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">The maximum number of macroblocks in a slice. Used when
+<constant>V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE</constant> is set to <constant>V4L2_MPEG_VIDEO_MULTI_SLICE_MODE_MAX_MB</constant>.
+Applicable to the encoder.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_BYTES</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">The maximum size of a slice in bytes. Used when
+<constant>V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE</constant> is set to <constant>V4L2_MPEG_VIDEO_MULTI_SLICE_MODE_MAX_BYTES</constant>.
+Applicable to the encoder.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row id="v4l2-mpeg-video-h264-loop-filter-mode">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE</constant>&nbsp;</entry>
+ <entry>enum&nbsp;v4l2_mpeg_video_h264_loop_filter_mode</entry>
+ </row>
+ <row><entry spanname="descr">Loop filter mode for H264 encoder.
+Possible values are:</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_LOOP_FILTER_MODE_ENABLED</constant>&nbsp;</entry>
+ <entry>Loop filter is enabled.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_LOOP_FILTER_MODE_DISABLED</constant>&nbsp;</entry>
+ <entry>Loop filter is disabled.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_LOOP_FILTER_MODE_DISABLED_AT_SLICE_BOUNDARY</constant>&nbsp;</entry>
+ <entry>Loop filter is disabled at the slice boundary.</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_ALPHA</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Loop filter alpha coefficient, defined in the H264 standard.
+Applicable to the H264 encoder.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_BETA</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Loop filter beta coefficient, defined in the H264 standard.
+Applicable to the H264 encoder.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row id="v4l2-mpeg-video-h264-entropy-mode">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE</constant>&nbsp;</entry>
+ <entry>enum&nbsp;v4l2_mpeg_video_h264_entropy_mode</entry>
+ </row>
+ <row><entry spanname="descr">Entropy coding mode for H264 - CABAC/CAVALC.
+Applicable to the H264 encoder.
+Possible values are:</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_ENTROPY_MODE_CAVLC</constant>&nbsp;</entry>
+ <entry>Use CAVLC entropy coding.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_ENTROPY_MODE_CABAC</constant>&nbsp;</entry>
+ <entry>Use CABAC entropy coding.</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row>
+ <row><entry spanname="descr">Enable 8X8 transform for H264. Applicable to the H264 encoder.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_CYCLIC_INTRA_REFRESH_MB</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Cyclic intra macroblock refresh. This is the number of continuous macroblocks
+refreshed every frame. Each frame a successive set of macroblocks is refreshed until the cycle completes and starts from the
+top of the frame. Applicable to H264, H263 and MPEG4 encoder.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row>
+ <row><entry spanname="descr">Frame level rate control enable.
+If this control is disabled then the quantization parameter for each frame type is constant and set with appropriate controls
+(e.g. <constant>V4L2_CID_MPEG_VIDEO_H263_I_FRAME_QP</constant>).
+If frame rate control is enabled then quantization parameter is adjusted to meet the chosen bitrate. Minimum and maximum value
+for the quantization parameter can be set with appropriate controls (e.g. <constant>V4L2_CID_MPEG_VIDEO_H263_MIN_QP</constant>).
+Applicable to encoders.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row>
+ <row><entry spanname="descr">Macroblock level rate control enable.
+Applicable to the MPEG4 and H264 encoders.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_MPEG4_QPEL</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row>
+ <row><entry spanname="descr">Quarter pixel motion estimation for MPEG4. Applicable to the MPEG4 encoder.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H263_I_FRAME_QP</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Quantization parameter for an I frame for H263. Valid range: from 1 to 31.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H263_MIN_QP</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Minimum quantization parameter for H263. Valid range: from 1 to 31.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H263_MAX_QP</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Maximum quantization parameter for H263. Valid range: from 1 to 31.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H263_P_FRAME_QP</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Quantization parameter for an P frame for H263. Valid range: from 1 to 31.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H263_B_FRAME_QP</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Quantization parameter for an B frame for H263. Valid range: from 1 to 31.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_I_FRAME_QP</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Quantization parameter for an I frame for H264. Valid range: from 0 to 51.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_MIN_QP</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Minimum quantization parameter for H264. Valid range: from 0 to 51.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_MAX_QP</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Maximum quantization parameter for H264. Valid range: from 0 to 51.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_P_FRAME_QP</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Quantization parameter for an P frame for H264. Valid range: from 0 to 51.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_B_FRAME_QP</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Quantization parameter for an B frame for H264. Valid range: from 0 to 51.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Quantization parameter for an I frame for MPEG4. Valid range: from 1 to 31.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_MPEG4_MIN_QP</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Minimum quantization parameter for MPEG4. Valid range: from 1 to 31.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_MPEG4_MAX_QP</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Maximum quantization parameter for MPEG4. Valid range: from 1 to 31.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_MPEG4_P_FRAME_QP</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Quantization parameter for an P frame for MPEG4. Valid range: from 1 to 31.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_MPEG4_B_FRAME_QP</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Quantization parameter for an B frame for MPEG4. Valid range: from 1 to 31.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_VBV_SIZE</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">The Video Buffer Verifier size in kilobytes, it is used as a limitation of frame skip.
+The VBV is defined in the standard as a mean to verify that the produced stream will be successfully decoded.
+The standard describes it as "Part of a hypothetical decoder that is conceptually connected to the
+output of the encoder. Its purpose is to provide a constraint on the variability of the data rate that an
+encoder or editing process may produce.".
+Applicable to the MPEG1, MPEG2, MPEG4 encoders.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row id="v4l2-mpeg-video-vbv-delay">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_VBV_DELAY</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row><row><entry spanname="descr">Sets the initial delay in milliseconds for
+VBV buffer control.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row id="v4l2-mpeg-video-hor-search-range">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_MV_H_SEARCH_RANGE</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Horizontal search range defines maximum horizontal search area in pixels
+to search and match for the present Macroblock (MB) in the reference picture. This V4L2 control macro is used to set
+horizontal search range for motion estimation module in video encoder.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row id="v4l2-mpeg-video-vert-search-range">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Vertical search range defines maximum vertical search area in pixels
+to search and match for the present Macroblock (MB) in the reference picture. This V4L2 control macro is used to set
+vertical search range for motion estimation module in video encoder.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_CPB_SIZE</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">The Coded Picture Buffer size in kilobytes, it is used as a limitation of frame skip.
+The CPB is defined in the H264 standard as a mean to verify that the produced stream will be successfully decoded.
+Applicable to the H264 encoder.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_I_PERIOD</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Period between I-frames in the open GOP for H264. In case of an open GOP
+this is the period between two I-frames. The period between IDR (Instantaneous Decoding Refresh) frames is taken from the GOP_SIZE control.
+An IDR frame, which stands for Instantaneous Decoding Refresh is an I-frame after which no prior frames are
+referenced. This means that a stream can be restarted from an IDR frame without the need to store or decode any
+previous frames. Applicable to the H264 encoder.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row id="v4l2-mpeg-video-header-mode">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_HEADER_MODE</constant>&nbsp;</entry>
+ <entry>enum&nbsp;v4l2_mpeg_video_header_mode</entry>
+ </row>
+ <row><entry spanname="descr">Determines whether the header is returned as the first buffer or is
+it returned together with the first frame. Applicable to encoders.
+Possible values are:</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_HEADER_MODE_SEPARATE</constant>&nbsp;</entry>
+ <entry>The stream header is returned separately in the first buffer.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_HEADER_MODE_JOINED_WITH_1ST_FRAME</constant>&nbsp;</entry>
+ <entry>The stream header is returned together with the first encoded frame.</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_REPEAT_SEQ_HEADER</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row><row><entry spanname="descr">Repeat the video sequence headers. Repeating these
+headers makes random access to the video stream easier. Applicable to the MPEG1, 2 and 4 encoder.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row><row><entry spanname="descr">Enabled the deblocking post processing filter for MPEG4 decoder.
+Applicable to the MPEG4 decoder.</entry>
+ </row>
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_MPEG4_VOP_TIME_RES</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row><row><entry spanname="descr">vop_time_increment_resolution value for MPEG4. Applicable to the MPEG4 encoder.</entry>
+ </row>
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_MPEG4_VOP_TIME_INC</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row><row><entry spanname="descr">vop_time_increment value for MPEG4. Applicable to the MPEG4 encoder.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_SEI_FRAME_PACKING</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row>
+ <row><entry spanname="descr">Enable generation of frame packing supplemental enhancement information in the encoded bitstream.
+The frame packing SEI message contains the arrangement of L and R planes for 3D viewing. Applicable to the H264 encoder.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_SEI_FP_CURRENT_FRAME_0</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row>
+ <row><entry spanname="descr">Sets current frame as frame0 in frame packing SEI.
+Applicable to the H264 encoder.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row id="v4l2-mpeg-video-h264-sei-fp-arrangement-type">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE</constant>&nbsp;</entry>
+ <entry>enum&nbsp;v4l2_mpeg_video_h264_sei_fp_arrangement_type</entry>
+ </row>
+ <row><entry spanname="descr">Frame packing arrangement type for H264 SEI.
+Applicable to the H264 encoder.
+Possible values are:</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_CHEKERBOARD</constant>&nbsp;</entry>
+ <entry>Pixels are alternatively from L and R.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_COLUMN</constant>&nbsp;</entry>
+ <entry>L and R are interlaced by column.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_ROW</constant>&nbsp;</entry>
+ <entry>L and R are interlaced by row.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_SIDE_BY_SIDE</constant>&nbsp;</entry>
+ <entry>L is on the left, R on the right.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_TOP_BOTTOM</constant>&nbsp;</entry>
+ <entry>L is on top, R on bottom.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_TEMPORAL</constant>&nbsp;</entry>
+ <entry>One view per frame.</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_FMO</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row>
+ <row><entry spanname="descr">Enables flexible macroblock ordering in the encoded bitstream. It is a technique
+used for restructuring the ordering of macroblocks in pictures. Applicable to the H264 encoder.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row id="v4l2-mpeg-video-h264-fmo-map-type">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE</constant>&nbsp;</entry>
+ <entry>enum&nbsp;v4l2_mpeg_video_h264_fmo_map_type</entry>
+ </row>
+ <row><entry spanname="descr">When using FMO, the map type divides the image in different scan patterns of macroblocks.
+Applicable to the H264 encoder.
+Possible values are:</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_INTERLEAVED_SLICES</constant>&nbsp;</entry>
+ <entry>Slices are interleaved one after other with macroblocks in run length order.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_SCATTERED_SLICES</constant>&nbsp;</entry>
+ <entry>Scatters the macroblocks based on a mathematical function known to both encoder and decoder.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_FOREGROUND_WITH_LEFT_OVER</constant>&nbsp;</entry>
+ <entry>Macroblocks arranged in rectangular areas or regions of interest.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_BOX_OUT</constant>&nbsp;</entry>
+ <entry>Slice groups grow in a cyclic way from centre to outwards.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_RASTER_SCAN</constant>&nbsp;</entry>
+ <entry>Slice groups grow in raster scan pattern from left to right.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_WIPE_SCAN</constant>&nbsp;</entry>
+ <entry>Slice groups grow in wipe scan pattern from top to bottom.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_EXPLICIT</constant>&nbsp;</entry>
+ <entry>User defined map type.</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_FMO_SLICE_GROUP</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Number of slice groups in FMO.
+Applicable to the H264 encoder.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row id="v4l2-mpeg-video-h264-fmo-change-direction">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_DIRECTION</constant>&nbsp;</entry>
+ <entry>enum&nbsp;v4l2_mpeg_video_h264_fmo_change_dir</entry>
+ </row>
+ <row><entry spanname="descr">Specifies a direction of the slice group change for raster and wipe maps.
+Applicable to the H264 encoder.
+Possible values are:</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_FMO_CHANGE_DIR_RIGHT</constant>&nbsp;</entry>
+ <entry>Raster scan or wipe right.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_FMO_CHANGE_DIR_LEFT</constant>&nbsp;</entry>
+ <entry>Reverse raster scan or wipe left.</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_RATE</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Specifies the size of the first slice group for raster and wipe map.
+Applicable to the H264 encoder.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_FMO_RUN_LENGTH</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Specifies the number of consecutive macroblocks for the interleaved map.
+Applicable to the H264 encoder.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_ASO</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row>
+ <row><entry spanname="descr">Enables arbitrary slice ordering in encoded bitstream.
+Applicable to the H264 encoder.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_ASO_SLICE_ORDER</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row><row><entry spanname="descr">Specifies the slice order in ASO. Applicable to the H264 encoder.
+The supplied 32-bit integer is interpreted as follows (bit
+0 = least significant bit):</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry>Bit 0:15</entry>
+ <entry>Slice ID</entry>
+ </row>
+ <row>
+ <entry>Bit 16:32</entry>
+ <entry>Slice position or order</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row>
+ <row><entry spanname="descr">Enables H264 hierarchical coding.
+Applicable to the H264 encoder.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row id="v4l2-mpeg-video-h264-hierarchical-coding-type">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_TYPE</constant>&nbsp;</entry>
+ <entry>enum&nbsp;v4l2_mpeg_video_h264_hierarchical_coding_type</entry>
+ </row>
+ <row><entry spanname="descr">Specifies the hierarchical coding type.
+Applicable to the H264 encoder.
+Possible values are:</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_HIERARCHICAL_CODING_B</constant>&nbsp;</entry>
+ <entry>Hierarchical B coding.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VIDEO_H264_HIERARCHICAL_CODING_P</constant>&nbsp;</entry>
+ <entry>Hierarchical P coding.</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Specifies the number of hierarchical coding layers.
+Applicable to the H264 encoder.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER_QP</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row><row><entry spanname="descr">Specifies a user defined QP for each layer. Applicable to the H264 encoder.
+The supplied 32-bit integer is interpreted as follows (bit
+0 = least significant bit):</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry>Bit 0:15</entry>
+ <entry>QP value</entry>
+ </row>
+ <row>
+ <entry>Bit 16:32</entry>
+ <entry>Layer number</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+
+ </tbody>
+ </tgroup>
+ </table>
+ </section>
+
+ <section>
+ <title>MFC 5.1 MPEG Controls</title>
+
+ <para>The following MPEG class controls deal with MPEG
+decoding and encoding settings that are specific to the Multi Format Codec 5.1 device present
+in the S5P family of SoCs by Samsung.
+</para>
+
+ <table pgwide="1" frame="none" id="mfc51-control-id">
+ <title>MFC 5.1 Control IDs</title>
+ <tgroup cols="4">
+ <colspec colname="c1" colwidth="1*" />
+ <colspec colname="c2" colwidth="6*" />
+ <colspec colname="c3" colwidth="2*" />
+ <colspec colname="c4" colwidth="6*" />
+ <spanspec namest="c1" nameend="c2" spanname="id" />
+ <spanspec namest="c2" nameend="c4" spanname="descr" />
+ <thead>
+ <row>
+ <entry spanname="id" align="left">ID</entry>
+ <entry align="left">Type</entry>
+ </row><row><entry spanname="descr" align="left">Description</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_MFC51_VIDEO_DECODER_H264_DISPLAY_DELAY_ENABLE</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row><row><entry spanname="descr">If the display delay is enabled then the decoder is forced to return a
+CAPTURE buffer (decoded frame) after processing a certain number of OUTPUT buffers. The delay can be set through
+<constant>V4L2_CID_MPEG_MFC51_VIDEO_DECODER_H264_DISPLAY_DELAY</constant>. This feature can be used for example
+for generating thumbnails of videos. Applicable to the H264 decoder.
+ </entry>
+ </row>
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_MFC51_VIDEO_DECODER_H264_DISPLAY_DELAY</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row><row><entry spanname="descr">Display delay value for H264 decoder.
+The decoder is forced to return a decoded frame after the set 'display delay' number of frames. If this number is
+low it may result in frames returned out of dispaly order, in addition the hardware may still be using the returned buffer
+as a reference picture for subsequent frames.
+</entry>
+ </row>
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_MFC51_VIDEO_H264_NUM_REF_PIC_FOR_P</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row><row><entry spanname="descr">The number of reference pictures used for encoding a P picture.
+Applicable to the H264 encoder.</entry>
+ </row>
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_MFC51_VIDEO_PADDING</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row><row><entry spanname="descr">Padding enable in the encoder - use a color instead of repeating border pixels.
+Applicable to encoders.</entry>
+ </row>
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_MFC51_VIDEO_PADDING_YUV</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row><row><entry spanname="descr">Padding color in the encoder. Applicable to encoders. The supplied 32-bit integer is interpreted as follows (bit
+0 = least significant bit):</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry>Bit 0:7</entry>
+ <entry>V chrominance information</entry>
+ </row>
+ <row>
+ <entry>Bit 8:15</entry>
+ <entry>U chrominance information</entry>
+ </row>
+ <row>
+ <entry>Bit 16:23</entry>
+ <entry>Y luminance information</entry>
+ </row>
+ <row>
+ <entry>Bit 24:31</entry>
+ <entry>Must be zero.</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_MFC51_VIDEO_RC_REACTION_COEFF</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row><row><entry spanname="descr">Reaction coefficient for MFC rate control. Applicable to encoders.
+<para>Note 1: Valid only when the frame level RC is enabled.</para>
+<para>Note 2: For tight CBR, this field must be small (ex. 2 ~ 10).
+For VBR, this field must be large (ex. 100 ~ 1000).</para>
+<para>Note 3: It is not recommended to use the greater number than FRAME_RATE * (10^9 / BIT_RATE).</para>
+</entry>
+ </row>
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_MFC51_VIDEO_H264_ADAPTIVE_RC_DARK</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row><row><entry spanname="descr">Adaptive rate control for dark region.
+Valid only when H.264 and macroblock level RC is enabled (<constant>V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE</constant>).
+Applicable to the H264 encoder.</entry>
+ </row>
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_MFC51_VIDEO_H264_ADAPTIVE_RC_SMOOTH</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row><row><entry spanname="descr">Adaptive rate control for smooth region.
+Valid only when H.264 and macroblock level RC is enabled (<constant>V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE</constant>).
+Applicable to the H264 encoder.</entry>
+ </row>
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_MFC51_VIDEO_H264_ADAPTIVE_RC_STATIC</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row><row><entry spanname="descr">Adaptive rate control for static region.
+Valid only when H.264 and macroblock level RC is enabled (<constant>V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE</constant>).
+Applicable to the H264 encoder.</entry>
+ </row>
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_MFC51_VIDEO_H264_ADAPTIVE_RC_ACTIVITY</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row><row><entry spanname="descr">Adaptive rate control for activity region.
+Valid only when H.264 and macroblock level RC is enabled (<constant>V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE</constant>).
+Applicable to the H264 encoder.</entry>
+ </row>
+ <row><entry></entry></row>
+ <row id="v4l2-mpeg-mfc51-video-frame-skip-mode">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_MFC51_VIDEO_FRAME_SKIP_MODE</constant>&nbsp;</entry>
+ <entry>enum&nbsp;v4l2_mpeg_mfc51_video_frame_skip_mode</entry>
+ </row>
+ <row><entry spanname="descr">
+Indicates in what conditions the encoder should skip frames. If encoding a frame would cause the encoded stream to be larger then
+a chosen data limit then the frame will be skipped.
+Possible values are:</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_MPEG_MFC51_FRAME_SKIP_MODE_DISABLED</constant>&nbsp;</entry>
+ <entry>Frame skip mode is disabled.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_MFC51_FRAME_SKIP_MODE_LEVEL_LIMIT</constant>&nbsp;</entry>
+ <entry>Frame skip mode enabled and buffer limit is set by the chosen level and is defined by the standard.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_MFC51_FRAME_SKIP_MODE_BUF_LIMIT</constant>&nbsp;</entry>
+ <entry>Frame skip mode enabled and buffer limit is set by the VBV (MPEG1/2/4) or CPB (H264) buffer size control.</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_MFC51_VIDEO_RC_FIXED_TARGET_BIT</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row><row><entry spanname="descr">Enable rate-control with fixed target bit.
+If this setting is enabled, then the rate control logic of the encoder will calculate the average bitrate
+for a GOP and keep it below or equal the set bitrate target. Otherwise the rate control logic calculates the
+overall average bitrate for the stream and keeps it below or equal to the set bitrate. In the first case
+the average bitrate for the whole stream will be smaller then the set bitrate. This is caused because the
+average is calculated for smaller number of frames, on the other hand enabling this setting will ensure that
+the stream will meet tight bandwidth contraints. Applicable to encoders.
+</entry>
+ </row>
+ <row><entry></entry></row>
+ <row id="v4l2-mpeg-mfc51-video-force-frame-type">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_MFC51_VIDEO_FORCE_FRAME_TYPE</constant>&nbsp;</entry>
+ <entry>enum&nbsp;v4l2_mpeg_mfc51_video_force_frame_type</entry>
+ </row>
+ <row><entry spanname="descr">Force a frame type for the next queued buffer. Applicable to encoders.
+Possible values are:</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_MPEG_MFC51_FORCE_FRAME_TYPE_DISABLED</constant>&nbsp;</entry>
+ <entry>Forcing a specific frame type disabled.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_MFC51_FORCE_FRAME_TYPE_I_FRAME</constant>&nbsp;</entry>
+ <entry>Force an I-frame.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_MFC51_FORCE_FRAME_TYPE_NOT_CODED</constant>&nbsp;</entry>
+ <entry>Force a non-coded frame.</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </section>
+
+ <section>
+ <title>CX2341x MPEG Controls</title>
+
+ <para>The following MPEG class controls deal with MPEG
+encoding settings that are specific to the Conexant CX23415 and
+CX23416 MPEG encoding chips.</para>
+
+ <table pgwide="1" frame="none" id="cx2341x-control-id">
+ <title>CX2341x Control IDs</title>
+ <tgroup cols="4">
+ <colspec colname="c1" colwidth="1*" />
+ <colspec colname="c2" colwidth="6*" />
+ <colspec colname="c3" colwidth="2*" />
+ <colspec colname="c4" colwidth="6*" />
+ <spanspec namest="c1" nameend="c2" spanname="id" />
+ <spanspec namest="c2" nameend="c4" spanname="descr" />
+ <thead>
+ <row>
+ <entry spanname="id" align="left">ID</entry>
+ <entry align="left">Type</entry>
+ </row><row><entry spanname="descr" align="left">Description</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row><entry></entry></row>
+ <row id="v4l2-mpeg-cx2341x-video-spatial-filter-mode">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_CX2341X_VIDEO_SPATIAL_FILTER_MODE</constant>&nbsp;</entry>
+ <entry>enum&nbsp;v4l2_mpeg_cx2341x_video_spatial_filter_mode</entry>
+ </row><row><entry spanname="descr">Sets the Spatial
+Filter mode (default <constant>MANUAL</constant>). Possible values
+are:</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_MPEG_CX2341X_VIDEO_SPATIAL_FILTER_MODE_MANUAL</constant>&nbsp;</entry>
+ <entry>Choose the filter manually</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_CX2341X_VIDEO_SPATIAL_FILTER_MODE_AUTO</constant>&nbsp;</entry>
+ <entry>Choose the filter automatically</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_CX2341X_VIDEO_SPATIAL_FILTER</constant>&nbsp;</entry>
+ <entry>integer&nbsp;(0-15)</entry>
+ </row><row><entry spanname="descr">The setting for the
+Spatial Filter. 0 = off, 15 = maximum. (Default is 0.)</entry>
+ </row>
+ <row><entry></entry></row>
+ <row id="luma-spatial-filter-type">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_CX2341X_VIDEO_LUMA_SPATIAL_FILTER_TYPE</constant>&nbsp;</entry>
+ <entry>enum&nbsp;v4l2_mpeg_cx2341x_video_luma_spatial_filter_type</entry>
+ </row><row><entry spanname="descr">Select the algorithm
+to use for the Luma Spatial Filter (default
+<constant>1D_HOR</constant>). Possible values:</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_MPEG_CX2341X_VIDEO_LUMA_SPATIAL_FILTER_TYPE_OFF</constant>&nbsp;</entry>
+ <entry>No filter</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_CX2341X_VIDEO_LUMA_SPATIAL_FILTER_TYPE_1D_HOR</constant>&nbsp;</entry>
+ <entry>One-dimensional horizontal</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_CX2341X_VIDEO_LUMA_SPATIAL_FILTER_TYPE_1D_VERT</constant>&nbsp;</entry>
+ <entry>One-dimensional vertical</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_CX2341X_VIDEO_LUMA_SPATIAL_FILTER_TYPE_2D_HV_SEPARABLE</constant>&nbsp;</entry>
+ <entry>Two-dimensional separable</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_CX2341X_VIDEO_LUMA_SPATIAL_FILTER_TYPE_2D_SYM_NON_SEPARABLE</constant>&nbsp;</entry>
+ <entry>Two-dimensional symmetrical
+non-separable</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+ <row><entry></entry></row>
+ <row id="chroma-spatial-filter-type">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_CX2341X_VIDEO_CHROMA_SPATIAL_FILTER_TYPE</constant>&nbsp;</entry>
+ <entry>enum&nbsp;v4l2_mpeg_cx2341x_video_chroma_spatial_filter_type</entry>
+ </row><row><entry spanname="descr">Select the algorithm
+for the Chroma Spatial Filter (default <constant>1D_HOR</constant>).
+Possible values are:</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_MPEG_CX2341X_VIDEO_CHROMA_SPATIAL_FILTER_TYPE_OFF</constant>&nbsp;</entry>
+ <entry>No filter</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_CX2341X_VIDEO_CHROMA_SPATIAL_FILTER_TYPE_1D_HOR</constant>&nbsp;</entry>
+ <entry>One-dimensional horizontal</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+ <row><entry></entry></row>
+ <row id="v4l2-mpeg-cx2341x-video-temporal-filter-mode">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_CX2341X_VIDEO_TEMPORAL_FILTER_MODE</constant>&nbsp;</entry>
+ <entry>enum&nbsp;v4l2_mpeg_cx2341x_video_temporal_filter_mode</entry>
+ </row><row><entry spanname="descr">Sets the Temporal
+Filter mode (default <constant>MANUAL</constant>). Possible values
+are:</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_MPEG_CX2341X_VIDEO_TEMPORAL_FILTER_MODE_MANUAL</constant>&nbsp;</entry>
+ <entry>Choose the filter manually</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_CX2341X_VIDEO_TEMPORAL_FILTER_MODE_AUTO</constant>&nbsp;</entry>
+ <entry>Choose the filter automatically</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_CX2341X_VIDEO_TEMPORAL_FILTER</constant>&nbsp;</entry>
+ <entry>integer&nbsp;(0-31)</entry>
+ </row><row><entry spanname="descr">The setting for the
+Temporal Filter. 0 = off, 31 = maximum. (Default is 8 for full-scale
+capturing and 0 for scaled capturing.)</entry>
+ </row>
+ <row><entry></entry></row>
+ <row id="v4l2-mpeg-cx2341x-video-median-filter-type">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_CX2341X_VIDEO_MEDIAN_FILTER_TYPE</constant>&nbsp;</entry>
+ <entry>enum&nbsp;v4l2_mpeg_cx2341x_video_median_filter_type</entry>
+ </row><row><entry spanname="descr">Median Filter Type
+(default <constant>OFF</constant>). Possible values are:</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_MPEG_CX2341X_VIDEO_MEDIAN_FILTER_TYPE_OFF</constant>&nbsp;</entry>
+ <entry>No filter</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_CX2341X_VIDEO_MEDIAN_FILTER_TYPE_HOR</constant>&nbsp;</entry>
+ <entry>Horizontal filter</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_CX2341X_VIDEO_MEDIAN_FILTER_TYPE_VERT</constant>&nbsp;</entry>
+ <entry>Vertical filter</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_CX2341X_VIDEO_MEDIAN_FILTER_TYPE_HOR_VERT</constant>&nbsp;</entry>
+ <entry>Horizontal and vertical filter</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_CX2341X_VIDEO_MEDIAN_FILTER_TYPE_DIAG</constant>&nbsp;</entry>
+ <entry>Diagonal filter</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_CX2341X_VIDEO_LUMA_MEDIAN_FILTER_BOTTOM</constant>&nbsp;</entry>
+ <entry>integer&nbsp;(0-255)</entry>
+ </row><row><entry spanname="descr">Threshold above which
+the luminance median filter is enabled (default 0)</entry>
+ </row>
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_CX2341X_VIDEO_LUMA_MEDIAN_FILTER_TOP</constant>&nbsp;</entry>
+ <entry>integer&nbsp;(0-255)</entry>
+ </row><row><entry spanname="descr">Threshold below which
+the luminance median filter is enabled (default 255)</entry>
+ </row>
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_CX2341X_VIDEO_CHROMA_MEDIAN_FILTER_BOTTOM</constant>&nbsp;</entry>
+ <entry>integer&nbsp;(0-255)</entry>
+ </row><row><entry spanname="descr">Threshold above which
+the chroma median filter is enabled (default 0)</entry>
+ </row>
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_CX2341X_VIDEO_CHROMA_MEDIAN_FILTER_TOP</constant>&nbsp;</entry>
+ <entry>integer&nbsp;(0-255)</entry>
+ </row><row><entry spanname="descr">Threshold below which
+the chroma median filter is enabled (default 255)</entry>
+ </row>
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_CX2341X_STREAM_INSERT_NAV_PACKETS</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row>
+ <row><entry spanname="descr">The CX2341X MPEG encoder
+can insert one empty MPEG-2 PES packet into the stream between every
+four video frames. The packet size is 2048 bytes, including the
+packet_start_code_prefix and stream_id fields. The stream_id is 0xBF
+(private stream 2). The payload consists of 0x00 bytes, to be filled
+in by the application. 0 = do not insert, 1 = insert packets.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </section>
+
+ <section>
+ <title>VPX Control Reference</title>
+
+ <para>The VPX controls include controls for encoding parameters
+ of VPx video codec.</para>
+
+ <table pgwide="1" frame="none" id="vpx-control-id">
+ <title>VPX Control IDs</title>
+
+ <tgroup cols="4">
+ <colspec colname="c1" colwidth="1*" />
+ <colspec colname="c2" colwidth="6*" />
+ <colspec colname="c3" colwidth="2*" />
+ <colspec colname="c4" colwidth="6*" />
+ <spanspec namest="c1" nameend="c2" spanname="id" />
+ <spanspec namest="c2" nameend="c4" spanname="descr" />
+ <thead>
+ <row>
+ <entry spanname="id" align="left">ID</entry>
+ <entry align="left">Type</entry>
+ </row><row rowsep="1"><entry spanname="descr" align="left">Description</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row><entry></entry></row>
+
+ <row><entry></entry></row>
+ <row id="v4l2-vpx-num-partitions">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS</constant></entry>
+ <entry>enum v4l2_vp8_num_partitions</entry>
+ </row>
+ <row><entry spanname="descr">The number of token partitions to use in VP8 encoder.
+Possible values are:</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_CID_MPEG_VIDEO_VPX_1_PARTITION</constant></entry>
+ <entry>1 coefficient partition</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_MPEG_VIDEO_VPX_2_PARTITIONS</constant></entry>
+ <entry>2 coefficient partitions</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_MPEG_VIDEO_VPX_4_PARTITIONS</constant></entry>
+ <entry>4 coefficient partitions</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_MPEG_VIDEO_VPX_8_PARTITIONS</constant></entry>
+ <entry>8 coefficient partitions</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_VPX_IMD_DISABLE_4X4</constant></entry>
+ <entry>boolean</entry>
+ </row>
+ <row><entry spanname="descr">Setting this prevents intra 4x4 mode in the intra mode decision.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row id="v4l2-vpx-num-ref-frames">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES</constant></entry>
+ <entry>enum v4l2_vp8_num_ref_frames</entry>
+ </row>
+ <row><entry spanname="descr">The number of reference pictures for encoding P frames.
+Possible values are:</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_CID_MPEG_VIDEO_VPX_1_REF_FRAME</constant></entry>
+ <entry>Last encoded frame will be searched</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_MPEG_VIDEO_VPX_2_REF_FRAME</constant></entry>
+ <entry>Two frames will be searched among the last encoded frame, the golden frame
+and the alternate reference (altref) frame. The encoder implementation will decide which two are chosen.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_MPEG_VIDEO_VPX_3_REF_FRAME</constant></entry>
+ <entry>The last encoded frame, the golden frame and the altref frame will be searched.</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_VPX_FILTER_LEVEL</constant></entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Indicates the loop filter level. The adjustment of the loop
+filter level is done via a delta value against a baseline loop filter value.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_VPX_FILTER_SHARPNESS</constant></entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">This parameter affects the loop filter. Anything above
+zero weakens the deblocking effect on the loop filter.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_REF_PERIOD</constant></entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Sets the refresh period for the golden frame. The period is defined
+in number of frames. For a value of 'n', every nth frame starting from the first key frame will be taken as a golden frame.
+For eg. for encoding sequence of 0, 1, 2, 3, 4, 5, 6, 7 where the golden frame refresh period is set as 4, the frames
+0, 4, 8 etc will be taken as the golden frames as frame 0 is always a key frame.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row id="v4l2-vpx-golden-frame-sel">
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL</constant></entry>
+ <entry>enum v4l2_vp8_golden_frame_sel</entry>
+ </row>
+ <row><entry spanname="descr">Selects the golden frame for encoding.
+Possible values are:</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_USE_PREV</constant></entry>
+ <entry>Use the (n-2)th frame as a golden frame, current frame index being 'n'.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_USE_REF_PERIOD</constant></entry>
+ <entry>Use the previous specific frame indicated by
+V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_REF_PERIOD as a golden frame.</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_VPX_MIN_QP</constant></entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Minimum quantization parameter for VP8.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_VPX_MAX_QP</constant></entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Maximum quantization parameter for VP8.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_VPX_I_FRAME_QP</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Quantization parameter for an I frame for VP8.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_VPX_P_FRAME_QP</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Quantization parameter for a P frame for VP8.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_VPX_PROFILE</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Select the desired profile for VPx encoder.
+Acceptable values are 0, 1, 2 and 3 corresponding to encoder profiles 0, 1, 2 and 3.</entry>
+ </row>
+
+ <row><entry></entry></row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ </section>
+ </section>
+
+ <section id="camera-controls">
+ <title>Camera Control Reference</title>
+
+ <para>The Camera class includes controls for mechanical (or
+equivalent digital) features of a device such as controllable lenses
+or sensors.</para>
+
+ <table pgwide="1" frame="none" id="camera-control-id">
+ <title>Camera Control IDs</title>
+ <tgroup cols="4">
+ <colspec colname="c1" colwidth="1*" />
+ <colspec colname="c2" colwidth="6*" />
+ <colspec colname="c3" colwidth="2*" />
+ <colspec colname="c4" colwidth="6*" />
+ <spanspec namest="c1" nameend="c2" spanname="id" />
+ <spanspec namest="c2" nameend="c4" spanname="descr" />
+ <thead>
+ <row>
+ <entry spanname="id" align="left">ID</entry>
+ <entry align="left">Type</entry>
+ </row><row rowsep="1"><entry spanname="descr" align="left">Description</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_CAMERA_CLASS</constant>&nbsp;</entry>
+ <entry>class</entry>
+ </row><row><entry spanname="descr">The Camera class
+descriptor. Calling &VIDIOC-QUERYCTRL; for this control will return a
+description of this control class.</entry>
+ </row>
+ <row><entry></entry></row>
+
+ <row id="v4l2-exposure-auto-type">
+ <entry spanname="id"><constant>V4L2_CID_EXPOSURE_AUTO</constant>&nbsp;</entry>
+ <entry>enum&nbsp;v4l2_exposure_auto_type</entry>
+ </row><row><entry spanname="descr">Enables automatic
+adjustments of the exposure time and/or iris aperture. The effect of
+manual changes of the exposure time or iris aperture while these
+features are enabled is undefined, drivers should ignore such
+requests. Possible values are:</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_EXPOSURE_AUTO</constant>&nbsp;</entry>
+ <entry>Automatic exposure time, automatic iris
+aperture.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_EXPOSURE_MANUAL</constant>&nbsp;</entry>
+ <entry>Manual exposure time, manual iris.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_EXPOSURE_SHUTTER_PRIORITY</constant>&nbsp;</entry>
+ <entry>Manual exposure time, auto iris.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_EXPOSURE_APERTURE_PRIORITY</constant>&nbsp;</entry>
+ <entry>Auto exposure time, manual iris.</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+ <row><entry></entry></row>
+
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_EXPOSURE_ABSOLUTE</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row><row><entry spanname="descr">Determines the exposure
+time of the camera sensor. The exposure time is limited by the frame
+interval. Drivers should interpret the values as 100 &micro;s units,
+where the value 1 stands for 1/10000th of a second, 10000 for 1 second
+and 100000 for 10 seconds.</entry>
+ </row>
+ <row><entry></entry></row>
+
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_EXPOSURE_AUTO_PRIORITY</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row><row><entry spanname="descr">When
+<constant>V4L2_CID_EXPOSURE_AUTO</constant> is set to
+<constant>AUTO</constant> or <constant>APERTURE_PRIORITY</constant>,
+this control determines if the device may dynamically vary the frame
+rate. By default this feature is disabled (0) and the frame rate must
+remain constant.</entry>
+ </row>
+ <row><entry></entry></row>
+
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_EXPOSURE_BIAS</constant>&nbsp;</entry>
+ <entry>integer menu</entry>
+ </row><row><entry spanname="descr"> Determines the automatic
+exposure compensation, it is effective only when <constant>V4L2_CID_EXPOSURE_AUTO</constant>
+control is set to <constant>AUTO</constant>, <constant>SHUTTER_PRIORITY </constant>
+or <constant>APERTURE_PRIORITY</constant>.
+It is expressed in terms of EV, drivers should interpret the values as 0.001 EV
+units, where the value 1000 stands for +1 EV.
+<para>Increasing the exposure compensation value is equivalent to decreasing
+the exposure value (EV) and will increase the amount of light at the image
+sensor. The camera performs the exposure compensation by adjusting absolute
+exposure time and/or aperture.</para></entry>
+ </row>
+ <row><entry></entry></row>
+
+ <row id="v4l2-exposure-metering">
+ <entry spanname="id"><constant>V4L2_CID_EXPOSURE_METERING</constant>&nbsp;</entry>
+ <entry>enum&nbsp;v4l2_exposure_metering</entry>
+ </row><row><entry spanname="descr">Determines how the camera measures
+the amount of light available for the frame exposure. Possible values are:</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_EXPOSURE_METERING_AVERAGE</constant>&nbsp;</entry>
+ <entry>Use the light information coming from the entire frame
+and average giving no weighting to any particular portion of the metered area.
+ </entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_EXPOSURE_METERING_CENTER_WEIGHTED</constant>&nbsp;</entry>
+ <entry>Average the light information coming from the entire frame
+giving priority to the center of the metered area.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_EXPOSURE_METERING_SPOT</constant>&nbsp;</entry>
+ <entry>Measure only very small area at the center of the frame.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_EXPOSURE_METERING_MATRIX</constant>&nbsp;</entry>
+ <entry>A multi-zone metering. The light intensity is measured
+in several points of the frame and the the results are combined. The
+algorithm of the zones selection and their significance in calculating the
+final value is device dependent.</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+ <row><entry></entry></row>
+
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_PAN_RELATIVE</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row><row><entry spanname="descr">This control turns the
+camera horizontally by the specified amount. The unit is undefined. A
+positive value moves the camera to the right (clockwise when viewed
+from above), a negative value to the left. A value of zero does not
+cause motion. This is a write-only control.</entry>
+ </row>
+ <row><entry></entry></row>
+
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_TILT_RELATIVE</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row><row><entry spanname="descr">This control turns the
+camera vertically by the specified amount. The unit is undefined. A
+positive value moves the camera up, a negative value down. A value of
+zero does not cause motion. This is a write-only control.</entry>
+ </row>
+ <row><entry></entry></row>
+
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_PAN_RESET</constant>&nbsp;</entry>
+ <entry>button</entry>
+ </row><row><entry spanname="descr">When this control is set,
+the camera moves horizontally to the default position.</entry>
+ </row>
+ <row><entry></entry></row>
+
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_TILT_RESET</constant>&nbsp;</entry>
+ <entry>button</entry>
+ </row><row><entry spanname="descr">When this control is set,
+the camera moves vertically to the default position.</entry>
+ </row>
+ <row><entry></entry></row>
+
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_PAN_ABSOLUTE</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row><row><entry spanname="descr">This control
+turns the camera horizontally to the specified position. Positive
+values move the camera to the right (clockwise when viewed from above),
+negative values to the left. Drivers should interpret the values as arc
+seconds, with valid values between -180 * 3600 and +180 * 3600
+inclusive.</entry>
+ </row>
+ <row><entry></entry></row>
+
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_TILT_ABSOLUTE</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row><row><entry spanname="descr">This control
+turns the camera vertically to the specified position. Positive values
+move the camera up, negative values down. Drivers should interpret the
+values as arc seconds, with valid values between -180 * 3600 and +180
+* 3600 inclusive.</entry>
+ </row>
+ <row><entry></entry></row>
+
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_FOCUS_ABSOLUTE</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row><row><entry spanname="descr">This control sets the
+focal point of the camera to the specified position. The unit is
+undefined. Positive values set the focus closer to the camera,
+negative values towards infinity.</entry>
+ </row>
+ <row><entry></entry></row>
+
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_FOCUS_RELATIVE</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row><row><entry spanname="descr">This control moves the
+focal point of the camera by the specified amount. The unit is
+undefined. Positive values move the focus closer to the camera,
+negative values towards infinity. This is a write-only control.</entry>
+ </row>
+ <row><entry></entry></row>
+
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_FOCUS_AUTO</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row><row><entry spanname="descr">Enables continuous automatic
+focus adjustments. The effect of manual focus adjustments while this feature
+is enabled is undefined, drivers should ignore such requests.</entry>
+ </row>
+ <row><entry></entry></row>
+
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_AUTO_FOCUS_START</constant>&nbsp;</entry>
+ <entry>button</entry>
+ </row><row><entry spanname="descr">Starts single auto focus process.
+The effect of setting this control when <constant>V4L2_CID_FOCUS_AUTO</constant>
+is set to <constant>TRUE</constant> (1) is undefined, drivers should ignore
+such requests.</entry>
+ </row>
+ <row><entry></entry></row>
+
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_AUTO_FOCUS_STOP</constant>&nbsp;</entry>
+ <entry>button</entry>
+ </row><row><entry spanname="descr">Aborts automatic focusing
+started with <constant>V4L2_CID_AUTO_FOCUS_START</constant> control. It is
+effective only when the continuous autofocus is disabled, that is when
+<constant>V4L2_CID_FOCUS_AUTO</constant> control is set to <constant>FALSE
+</constant> (0).</entry>
+ </row>
+ <row><entry></entry></row>
+
+ <row id="v4l2-auto-focus-status">
+ <entry spanname="id">
+ <constant>V4L2_CID_AUTO_FOCUS_STATUS</constant>&nbsp;</entry>
+ <entry>bitmask</entry>
+ </row>
+ <row><entry spanname="descr">The automatic focus status. This is a read-only
+ control.</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_AUTO_FOCUS_STATUS_IDLE</constant>&nbsp;</entry>
+ <entry>Automatic focus is not active.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_AUTO_FOCUS_STATUS_BUSY</constant>&nbsp;</entry>
+ <entry>Automatic focusing is in progress.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_AUTO_FOCUS_STATUS_REACHED</constant>&nbsp;</entry>
+ <entry>Focus has been reached.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_AUTO_FOCUS_STATUS_FAILED</constant>&nbsp;</entry>
+ <entry>Automatic focus has failed, the driver will not
+ transition from this state until another action is
+ performed by an application.</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+ <row><entry spanname="descr">
+Setting <constant>V4L2_LOCK_FOCUS</constant> lock bit of the <constant>V4L2_CID_3A_LOCK
+</constant> control may stop updates of the <constant>V4L2_CID_AUTO_FOCUS_STATUS</constant>
+control value.</entry>
+ </row>
+ <row><entry></entry></row>
+
+ <row id="v4l2-auto-focus-range">
+ <entry spanname="id">
+ <constant>V4L2_CID_AUTO_FOCUS_RANGE</constant>&nbsp;</entry>
+ <entry>enum&nbsp;v4l2_auto_focus_range</entry>
+ </row>
+ <row><entry spanname="descr">Determines auto focus distance range
+for which lens may be adjusted. </entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_AUTO_FOCUS_RANGE_AUTO</constant>&nbsp;</entry>
+ <entry>The camera automatically selects the focus range.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_AUTO_FOCUS_RANGE_NORMAL</constant>&nbsp;</entry>
+ <entry>Normal distance range, limited for best automatic focus
+performance.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_AUTO_FOCUS_RANGE_MACRO</constant>&nbsp;</entry>
+ <entry>Macro (close-up) auto focus. The camera will
+use its minimum possible distance for auto focus.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_AUTO_FOCUS_RANGE_INFINITY</constant>&nbsp;</entry>
+ <entry>The lens is set to focus on an object at infinite distance.</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+ <row><entry></entry></row>
+
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_ZOOM_ABSOLUTE</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row><row><entry spanname="descr">Specify the objective lens
+focal length as an absolute value. The zoom unit is driver-specific and its
+value should be a positive integer.</entry>
+ </row>
+ <row><entry></entry></row>
+
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_ZOOM_RELATIVE</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row><row><entry spanname="descr">Specify the objective lens
+focal length relatively to the current value. Positive values move the zoom
+lens group towards the telephoto direction, negative values towards the
+wide-angle direction. The zoom unit is driver-specific. This is a write-only control.</entry>
+ </row>
+ <row><entry></entry></row>
+
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_ZOOM_CONTINUOUS</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row><row><entry spanname="descr">Move the objective lens group
+at the specified speed until it reaches physical device limits or until an
+explicit request to stop the movement. A positive value moves the zoom lens
+group towards the telephoto direction. A value of zero stops the zoom lens
+group movement. A negative value moves the zoom lens group towards the
+wide-angle direction. The zoom speed unit is driver-specific.</entry>
+ </row>
+ <row><entry></entry></row>
+
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_IRIS_ABSOLUTE</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row><row><entry spanname="descr">This control sets the
+camera's aperture to the specified value. The unit is undefined.
+Larger values open the iris wider, smaller values close it.</entry>
+ </row>
+ <row><entry></entry></row>
+
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_IRIS_RELATIVE</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row><row><entry spanname="descr">This control modifies the
+camera's aperture by the specified amount. The unit is undefined.
+Positive values open the iris one step further, negative values close
+it one step further. This is a write-only control.</entry>
+ </row>
+ <row><entry></entry></row>
+
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_PRIVACY</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row><row><entry spanname="descr">Prevent video from being acquired
+by the camera. When this control is set to <constant>TRUE</constant> (1), no
+image can be captured by the camera. Common means to enforce privacy are
+mechanical obturation of the sensor and firmware image processing, but the
+device is not restricted to these methods. Devices that implement the privacy
+control must support read access and may support write access.</entry>
+ </row>
+
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_BAND_STOP_FILTER</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row><row><entry spanname="descr">Switch the band-stop filter of a
+camera sensor on or off, or specify its strength. Such band-stop filters can
+be used, for example, to filter out the fluorescent light component.</entry>
+ </row>
+ <row><entry></entry></row>
+
+ <row id="v4l2-auto-n-preset-white-balance">
+ <entry spanname="id"><constant>V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE</constant>&nbsp;</entry>
+ <entry>enum&nbsp;v4l2_auto_n_preset_white_balance</entry>
+ </row><row><entry spanname="descr">Sets white balance to automatic,
+manual or a preset. The presets determine color temperature of the light as
+a hint to the camera for white balance adjustments resulting in most accurate
+color representation. The following white balance presets are listed in order
+of increasing color temperature.</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_WHITE_BALANCE_MANUAL</constant>&nbsp;</entry>
+ <entry>Manual white balance.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_WHITE_BALANCE_AUTO</constant>&nbsp;</entry>
+ <entry>Automatic white balance adjustments.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_WHITE_BALANCE_INCANDESCENT</constant>&nbsp;</entry>
+ <entry>White balance setting for incandescent (tungsten) lighting.
+It generally cools down the colors and corresponds approximately to 2500...3500 K
+color temperature range.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_WHITE_BALANCE_FLUORESCENT</constant>&nbsp;</entry>
+ <entry>White balance preset for fluorescent lighting.
+It corresponds approximately to 4000...5000 K color temperature.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_WHITE_BALANCE_FLUORESCENT_H</constant>&nbsp;</entry>
+ <entry>With this setting the camera will compensate for
+fluorescent H lighting.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_WHITE_BALANCE_HORIZON</constant>&nbsp;</entry>
+ <entry>White balance setting for horizon daylight.
+It corresponds approximately to 5000 K color temperature.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_WHITE_BALANCE_DAYLIGHT</constant>&nbsp;</entry>
+ <entry>White balance preset for daylight (with clear sky).
+It corresponds approximately to 5000...6500 K color temperature.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_WHITE_BALANCE_FLASH</constant>&nbsp;</entry>
+ <entry>With this setting the camera will compensate for the flash
+light. It slightly warms up the colors and corresponds roughly to 5000...5500 K
+color temperature.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_WHITE_BALANCE_CLOUDY</constant>&nbsp;</entry>
+ <entry>White balance preset for moderately overcast sky.
+This option corresponds approximately to 6500...8000 K color temperature
+range.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_WHITE_BALANCE_SHADE</constant>&nbsp;</entry>
+ <entry>White balance preset for shade or heavily overcast
+sky. It corresponds approximately to 9000...10000 K color temperature.
+</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+ <row><entry></entry></row>
+
+ <row id="v4l2-wide-dynamic-range">
+ <entry spanname="id"><constant>V4L2_CID_WIDE_DYNAMIC_RANGE</constant></entry>
+ <entry>boolean</entry>
+ </row>
+ <row>
+ <entry spanname="descr">Enables or disables the camera's wide dynamic
+range feature. This feature allows to obtain clear images in situations where
+intensity of the illumination varies significantly throughout the scene, i.e.
+there are simultaneously very dark and very bright areas. It is most commonly
+realized in cameras by combining two subsequent frames with different exposure
+times. <footnote id="ctypeconv"><para> This control may be changed to a menu
+control in the future, if more options are required.</para></footnote></entry>
+ </row>
+ <row><entry></entry></row>
+
+ <row id="v4l2-image-stabilization">
+ <entry spanname="id"><constant>V4L2_CID_IMAGE_STABILIZATION</constant></entry>
+ <entry>boolean</entry>
+ </row>
+ <row>
+ <entry spanname="descr">Enables or disables image stabilization.
+ <footnoteref linkend="ctypeconv"/></entry>
+ </row>
+ <row><entry></entry></row>
+
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_ISO_SENSITIVITY</constant>&nbsp;</entry>
+ <entry>integer menu</entry>
+ </row><row><entry spanname="descr">Determines ISO equivalent of an
+image sensor indicating the sensor's sensitivity to light. The numbers are
+expressed in arithmetic scale, as per <xref linkend="iso12232" /> standard,
+where doubling the sensor sensitivity is represented by doubling the numerical
+ISO value. Applications should interpret the values as standard ISO values
+multiplied by 1000, e.g. control value 800 stands for ISO 0.8. Drivers will
+usually support only a subset of standard ISO values. The effect of setting
+this control while the <constant>V4L2_CID_ISO_SENSITIVITY_AUTO</constant>
+control is set to a value other than <constant>V4L2_CID_ISO_SENSITIVITY_MANUAL
+</constant> is undefined, drivers should ignore such requests.</entry>
+ </row>
+ <row><entry></entry></row>
+
+ <row id="v4l2-iso-sensitivity-auto-type">
+ <entry spanname="id"><constant>V4L2_CID_ISO_SENSITIVITY_AUTO</constant>&nbsp;</entry>
+ <entry>enum&nbsp;v4l2_iso_sensitivity_type</entry>
+ </row><row><entry spanname="descr">Enables or disables automatic ISO
+sensitivity adjustments.</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_CID_ISO_SENSITIVITY_MANUAL</constant>&nbsp;</entry>
+ <entry>Manual ISO sensitivity.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CID_ISO_SENSITIVITY_AUTO</constant>&nbsp;</entry>
+ <entry>Automatic ISO sensitivity adjustments.</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+ <row><entry></entry></row>
+
+ <row id="v4l2-scene-mode">
+ <entry spanname="id"><constant>V4L2_CID_SCENE_MODE</constant>&nbsp;</entry>
+ <entry>enum&nbsp;v4l2_scene_mode</entry>
+ </row><row><entry spanname="descr">This control allows to select
+scene programs as the camera automatic modes optimized for common shooting
+scenes. Within these modes the camera determines best exposure, aperture,
+focusing, light metering, white balance and equivalent sensitivity. The
+controls of those parameters are influenced by the scene mode control.
+An exact behavior in each mode is subject to the camera specification.
+
+<para>When the scene mode feature is not used, this control should be set to
+<constant>V4L2_SCENE_MODE_NONE</constant> to make sure the other possibly
+related controls are accessible. The following scene programs are defined:
+</para>
+</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_SCENE_MODE_NONE</constant>&nbsp;</entry>
+ <entry>The scene mode feature is disabled.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_SCENE_MODE_BACKLIGHT</constant>&nbsp;</entry>
+ <entry>Backlight. Compensates for dark shadows when light is
+ coming from behind a subject, also by automatically turning
+ on the flash.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_SCENE_MODE_BEACH_SNOW</constant>&nbsp;</entry>
+ <entry>Beach and snow. This mode compensates for all-white or
+bright scenes, which tend to look gray and low contrast, when camera's automatic
+exposure is based on an average scene brightness. To compensate, this mode
+automatically slightly overexposes the frames. The white balance may also be
+adjusted to compensate for the fact that reflected snow looks bluish rather
+than white.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_SCENE_MODE_CANDLELIGHT</constant>&nbsp;</entry>
+ <entry>Candle light. The camera generally raises the ISO
+sensitivity and lowers the shutter speed. This mode compensates for relatively
+close subject in the scene. The flash is disabled in order to preserve the
+ambiance of the light.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_SCENE_MODE_DAWN_DUSK</constant>&nbsp;</entry>
+ <entry>Dawn and dusk. Preserves the colors seen in low
+natural light before dusk and after down. The camera may turn off the flash,
+and automatically focus at infinity. It will usually boost saturation and
+lower the shutter speed.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_SCENE_MODE_FALL_COLORS</constant>&nbsp;</entry>
+ <entry>Fall colors. Increases saturation and adjusts white
+balance for color enhancement. Pictures of autumn leaves get saturated reds
+and yellows.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_SCENE_MODE_FIREWORKS</constant>&nbsp;</entry>
+ <entry>Fireworks. Long exposure times are used to capture
+the expanding burst of light from a firework. The camera may invoke image
+stabilization.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_SCENE_MODE_LANDSCAPE</constant>&nbsp;</entry>
+ <entry>Landscape. The camera may choose a small aperture to
+provide deep depth of field and long exposure duration to help capture detail
+in dim light conditions. The focus is fixed at infinity. Suitable for distant
+and wide scenery.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_SCENE_MODE_NIGHT</constant>&nbsp;</entry>
+ <entry>Night, also known as Night Landscape. Designed for low
+light conditions, it preserves detail in the dark areas without blowing out bright
+objects. The camera generally sets itself to a medium-to-high ISO sensitivity,
+with a relatively long exposure time, and turns flash off. As such, there will be
+increased image noise and the possibility of blurred image.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_SCENE_MODE_PARTY_INDOOR</constant>&nbsp;</entry>
+ <entry>Party and indoor. Designed to capture indoor scenes
+that are lit by indoor background lighting as well as the flash. The camera
+usually increases ISO sensitivity, and adjusts exposure for the low light
+conditions.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_SCENE_MODE_PORTRAIT</constant>&nbsp;</entry>
+ <entry>Portrait. The camera adjusts the aperture so that the
+depth of field is reduced, which helps to isolate the subject against a smooth
+background. Most cameras recognize the presence of faces in the scene and focus
+on them. The color hue is adjusted to enhance skin tones. The intensity of the
+flash is often reduced.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_SCENE_MODE_SPORTS</constant>&nbsp;</entry>
+ <entry>Sports. Significantly increases ISO and uses a fast
+shutter speed to freeze motion of rapidly-moving subjects. Increased image
+noise may be seen in this mode.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_SCENE_MODE_SUNSET</constant>&nbsp;</entry>
+ <entry>Sunset. Preserves deep hues seen in sunsets and
+sunrises. It bumps up the saturation.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_SCENE_MODE_TEXT</constant>&nbsp;</entry>
+ <entry>Text. It applies extra contrast and sharpness, it is
+typically a black-and-white mode optimized for readability. Automatic focus
+may be switched to close-up mode and this setting may also involve some
+lens-distortion correction.</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+ <row><entry></entry></row>
+
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_3A_LOCK</constant></entry>
+ <entry>bitmask</entry>
+ </row>
+ <row>
+ <entry spanname="descr">This control locks or unlocks the automatic
+focus, exposure and white balance. The automatic adjustments can be paused
+independently by setting the corresponding lock bit to 1. The camera then retains
+the settings until the lock bit is cleared. The following lock bits are defined:
+</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_LOCK_EXPOSURE</constant></entry>
+ <entry>Automatic exposure adjustments lock.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_LOCK_WHITE_BALANCE</constant></entry>
+ <entry>Automatic white balance adjustments lock.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_LOCK_FOCUS</constant></entry>
+ <entry>Automatic focus lock.</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+ <row><entry spanname="descr">
+When a given algorithm is not enabled, drivers should ignore requests
+to lock it and should return no error. An example might be an application
+setting bit <constant>V4L2_LOCK_WHITE_BALANCE</constant> when the
+<constant>V4L2_CID_AUTO_WHITE_BALANCE</constant> control is set to
+<constant>FALSE</constant>. The value of this control may be changed
+by exposure, white balance or focus controls.</entry>
+ </row>
+ <row><entry></entry></row>
+
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_PAN_SPEED</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row><row><entry spanname="descr">This control turns the
+camera horizontally at the specific speed. The unit is undefined. A
+positive value moves the camera to the right (clockwise when viewed
+from above), a negative value to the left. A value of zero stops the motion
+if one is in progress and has no effect otherwise.</entry>
+ </row>
+ <row><entry></entry></row>
+
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_TILT_SPEED</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row><row><entry spanname="descr">This control turns the
+camera vertically at the specified speed. The unit is undefined. A
+positive value moves the camera up, a negative value down. A value of zero
+stops the motion if one is in progress and has no effect otherwise.</entry>
+ </row>
+ <row><entry></entry></row>
+
+ </tbody>
+ </tgroup>
+ </table>
+ </section>
+
+ <section id="fm-tx-controls">
+ <title>FM Transmitter Control Reference</title>
+
+ <para>The FM Transmitter (FM_TX) class includes controls for common features of
+FM transmissions capable devices. Currently this class includes parameters for audio
+compression, pilot tone generation, audio deviation limiter, RDS transmission and
+tuning power features.</para>
+
+ <table pgwide="1" frame="none" id="fm-tx-control-id">
+ <title>FM_TX Control IDs</title>
+
+ <tgroup cols="4">
+ <colspec colname="c1" colwidth="1*" />
+ <colspec colname="c2" colwidth="6*" />
+ <colspec colname="c3" colwidth="2*" />
+ <colspec colname="c4" colwidth="6*" />
+ <spanspec namest="c1" nameend="c2" spanname="id" />
+ <spanspec namest="c2" nameend="c4" spanname="descr" />
+ <thead>
+ <row>
+ <entry spanname="id" align="left">ID</entry>
+ <entry align="left">Type</entry>
+ </row><row rowsep="1"><entry spanname="descr" align="left">Description</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_FM_TX_CLASS</constant>&nbsp;</entry>
+ <entry>class</entry>
+ </row><row><entry spanname="descr">The FM_TX class
+descriptor. Calling &VIDIOC-QUERYCTRL; for this control will return a
+description of this control class.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_RDS_TX_DEVIATION</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Configures RDS signal frequency deviation level in Hz.
+The range and step are driver-specific.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_RDS_TX_PI</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Sets the RDS Programme Identification field
+for transmission.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_RDS_TX_PTY</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Sets the RDS Programme Type field for transmission.
+This encodes up to 31 pre-defined programme types.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_RDS_TX_PS_NAME</constant>&nbsp;</entry>
+ <entry>string</entry>
+ </row>
+ <row><entry spanname="descr">Sets the Programme Service name (PS_NAME) for transmission.
+It is intended for static display on a receiver. It is the primary aid to listeners in programme service
+identification and selection. In Annex E of <xref linkend="iec62106" />, the RDS specification,
+there is a full description of the correct character encoding for Programme Service name strings.
+Also from RDS specification, PS is usually a single eight character text. However, it is also possible
+to find receivers which can scroll strings sized as 8 x N characters. So, this control must be configured
+with steps of 8 characters. The result is it must always contain a string with size multiple of 8.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_RDS_TX_RADIO_TEXT</constant>&nbsp;</entry>
+ <entry>string</entry>
+ </row>
+ <row><entry spanname="descr">Sets the Radio Text info for transmission. It is a textual description of
+what is being broadcasted. RDS Radio Text can be applied when broadcaster wishes to transmit longer PS names,
+programme-related information or any other text. In these cases, RadioText should be used in addition to
+<constant>V4L2_CID_RDS_TX_PS_NAME</constant>. The encoding for Radio Text strings is also fully described
+in Annex E of <xref linkend="iec62106" />. The length of Radio Text strings depends on which RDS Block is being
+used to transmit it, either 32 (2A block) or 64 (2B block). However, it is also possible
+to find receivers which can scroll strings sized as 32 x N or 64 x N characters. So, this control must be configured
+with steps of 32 or 64 characters. The result is it must always contain a string with size multiple of 32 or 64. </entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_RDS_TX_MONO_STEREO</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row>
+ <row><entry spanname="descr">Sets the Mono/Stereo bit of the Decoder Identification code. If set,
+then the audio was recorded as stereo.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_RDS_TX_ARTIFICIAL_HEAD</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row>
+ <row><entry spanname="descr">Sets the
+<ulink url="http://en.wikipedia.org/wiki/Artificial_head">Artificial Head</ulink> bit of the Decoder
+Identification code. If set, then the audio was recorded using an artificial head.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_RDS_TX_COMPRESSED</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row>
+ <row><entry spanname="descr">Sets the Compressed bit of the Decoder Identification code. If set,
+then the audio is compressed.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_RDS_TX_DYNAMIC_PTY</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row>
+ <row><entry spanname="descr">Sets the Dynamic PTY bit of the Decoder Identification code. If set,
+then the PTY code is dynamically switched.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_RDS_TX_TRAFFIC_ANNOUNCEMENT</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row>
+ <row><entry spanname="descr">If set, then a traffic announcement is in progress.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_RDS_TX_TRAFFIC_PROGRAM</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row>
+ <row><entry spanname="descr">If set, then the tuned programme carries traffic announcements.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_RDS_TX_MUSIC_SPEECH</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row>
+ <row><entry spanname="descr">If set, then this channel broadcasts music. If cleared, then it
+broadcasts speech. If the transmitter doesn't make this distinction, then it should be set.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_RDS_TX_ALT_FREQS_ENABLE</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row>
+ <row><entry spanname="descr">If set, then transmit alternate frequencies.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_RDS_TX_ALT_FREQS</constant>&nbsp;</entry>
+ <entry>__u32 array</entry>
+ </row>
+ <row><entry spanname="descr">The alternate frequencies in kHz units. The RDS standard allows
+for up to 25 frequencies to be defined. Drivers may support fewer frequencies so check
+the array size.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_AUDIO_LIMITER_ENABLED</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row>
+ <row><entry spanname="descr">Enables or disables the audio deviation limiter feature.
+The limiter is useful when trying to maximize the audio volume, minimize receiver-generated
+distortion and prevent overmodulation.
+</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_AUDIO_LIMITER_RELEASE_TIME</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Sets the audio deviation limiter feature release time.
+Unit is in useconds. Step and range are driver-specific.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_AUDIO_LIMITER_DEVIATION</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Configures audio frequency deviation level in Hz.
+The range and step are driver-specific.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_AUDIO_COMPRESSION_ENABLED</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row>
+ <row><entry spanname="descr">Enables or disables the audio compression feature.
+This feature amplifies signals below the threshold by a fixed gain and compresses audio
+signals above the threshold by the ratio of Threshold/(Gain + Threshold).</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_AUDIO_COMPRESSION_GAIN</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Sets the gain for audio compression feature. It is
+a dB value. The range and step are driver-specific.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_AUDIO_COMPRESSION_THRESHOLD</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Sets the threshold level for audio compression freature.
+It is a dB value. The range and step are driver-specific.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Sets the attack time for audio compression feature.
+It is a useconds value. The range and step are driver-specific.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Sets the release time for audio compression feature.
+It is a useconds value. The range and step are driver-specific.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_PILOT_TONE_ENABLED</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row>
+ <row><entry spanname="descr">Enables or disables the pilot tone generation feature.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_PILOT_TONE_DEVIATION</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Configures pilot tone frequency deviation level. Unit is
+in Hz. The range and step are driver-specific.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_PILOT_TONE_FREQUENCY</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Configures pilot tone frequency value. Unit is
+in Hz. The range and step are driver-specific.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_TUNE_PREEMPHASIS</constant>&nbsp;</entry>
+ <entry>enum v4l2_preemphasis</entry>
+ </row>
+ <row id="v4l2-preemphasis"><entry spanname="descr">Configures the pre-emphasis value for broadcasting.
+A pre-emphasis filter is applied to the broadcast to accentuate the high audio frequencies.
+Depending on the region, a time constant of either 50 or 75 useconds is used. The enum&nbsp;v4l2_preemphasis
+defines possible values for pre-emphasis. Here they are:</entry>
+ </row><row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_PREEMPHASIS_DISABLED</constant>&nbsp;</entry>
+ <entry>No pre-emphasis is applied.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_PREEMPHASIS_50_uS</constant>&nbsp;</entry>
+ <entry>A pre-emphasis of 50 uS is used.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_PREEMPHASIS_75_uS</constant>&nbsp;</entry>
+ <entry>A pre-emphasis of 75 uS is used.</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_TUNE_POWER_LEVEL</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Sets the output power level for signal transmission.
+Unit is in dBuV. Range and step are driver-specific.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_TUNE_ANTENNA_CAPACITOR</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">This selects the value of antenna tuning capacitor
+manually or automatically if set to zero. Unit, range and step are driver-specific.</entry>
+ </row>
+ <row><entry></entry></row>
+ </tbody>
+ </tgroup>
+ </table>
+
+<para>For more details about RDS specification, refer to
+<xref linkend="iec62106" /> document, from CENELEC.</para>
+ </section>
+
+ <section id="flash-controls">
+ <title>Flash Control Reference</title>
+
+ <note>
+ <title>Experimental</title>
+
+ <para>This is an <link linkend="experimental">experimental</link>
+interface and may change in the future.</para>
+ </note>
+
+ <para>
+ The V4L2 flash controls are intended to provide generic access
+ to flash controller devices. Flash controller devices are
+ typically used in digital cameras.
+ </para>
+
+ <para>
+ The interface can support both LED and xenon flash devices. As
+ of writing this, there is no xenon flash driver using this
+ interface.
+ </para>
+
+ <section id="flash-controls-use-cases">
+ <title>Supported use cases</title>
+
+ <section>
+ <title>Unsynchronised LED flash (software strobe)</title>
+
+ <para>
+ Unsynchronised LED flash is controlled directly by the
+ host as the sensor. The flash must be enabled by the host
+ before the exposure of the image starts and disabled once
+ it ends. The host is fully responsible for the timing of
+ the flash.
+ </para>
+
+ <para>Example of such device: Nokia N900.</para>
+ </section>
+
+ <section>
+ <title>Synchronised LED flash (hardware strobe)</title>
+
+ <para>
+ The synchronised LED flash is pre-programmed by the host
+ (power and timeout) but controlled by the sensor through a
+ strobe signal from the sensor to the flash.
+ </para>
+
+ <para>
+ The sensor controls the flash duration and timing. This
+ information typically must be made available to the
+ sensor.
+ </para>
+
+ </section>
+
+ <section>
+ <title>LED flash as torch</title>
+
+ <para>
+ LED flash may be used as torch in conjunction with another
+ use case involving camera or individually.
+ </para>
+
+
+ <table pgwide="1" frame="none" id="flash-control-id">
+ <title>Flash Control IDs</title>
+
+ <tgroup cols="4">
+ <colspec colname="c1" colwidth="1*" />
+ <colspec colname="c2" colwidth="6*" />
+ <colspec colname="c3" colwidth="2*" />
+ <colspec colname="c4" colwidth="6*" />
+ <spanspec namest="c1" nameend="c2" spanname="id" />
+ <spanspec namest="c2" nameend="c4" spanname="descr" />
+ <thead>
+ <row>
+ <entry spanname="id" align="left">ID</entry>
+ <entry align="left">Type</entry>
+ </row><row rowsep="1"><entry spanname="descr" align="left">Description</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_FLASH_CLASS</constant></entry>
+ <entry>class</entry>
+ </row>
+ <row>
+ <entry spanname="descr">The FLASH class descriptor.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_FLASH_LED_MODE</constant></entry>
+ <entry>menu</entry>
+ </row>
+ <row id="v4l2-flash-led-mode">
+ <entry spanname="descr">Defines the mode of the flash LED,
+ the high-power white LED attached to the flash controller.
+ Setting this control may not be possible in presence of
+ some faults. See V4L2_CID_FLASH_FAULT.</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_FLASH_LED_MODE_NONE</constant></entry>
+ <entry>Off.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_FLASH_LED_MODE_FLASH</constant></entry>
+ <entry>Flash mode.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_FLASH_LED_MODE_TORCH</constant></entry>
+ <entry>Torch mode. See V4L2_CID_FLASH_TORCH_INTENSITY.</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_FLASH_STROBE_SOURCE</constant></entry>
+ <entry>menu</entry>
+ </row>
+ <row id="v4l2-flash-strobe-source"><entry
+ spanname="descr">Defines the source of the flash LED
+ strobe.</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_FLASH_STROBE_SOURCE_SOFTWARE</constant></entry>
+ <entry>The flash strobe is triggered by using
+ the V4L2_CID_FLASH_STROBE control.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_FLASH_STROBE_SOURCE_EXTERNAL</constant></entry>
+ <entry>The flash strobe is triggered by an
+ external source. Typically this is a sensor,
+ which makes it possible to synchronises the
+ flash strobe start to exposure start.</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_FLASH_STROBE</constant></entry>
+ <entry>button</entry>
+ </row>
+ <row>
+ <entry spanname="descr">Strobe flash. Valid when
+ V4L2_CID_FLASH_LED_MODE is set to
+ V4L2_FLASH_LED_MODE_FLASH and V4L2_CID_FLASH_STROBE_SOURCE
+ is set to V4L2_FLASH_STROBE_SOURCE_SOFTWARE. Setting this
+ control may not be possible in presence of some faults.
+ See V4L2_CID_FLASH_FAULT.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_FLASH_STROBE_STOP</constant></entry>
+ <entry>button</entry>
+ </row>
+ <row><entry spanname="descr">Stop flash strobe immediately.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_FLASH_STROBE_STATUS</constant></entry>
+ <entry>boolean</entry>
+ </row>
+ <row>
+ <entry spanname="descr">Strobe status: whether the flash
+ is strobing at the moment or not. This is a read-only
+ control.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_FLASH_TIMEOUT</constant></entry>
+ <entry>integer</entry>
+ </row>
+ <row>
+ <entry spanname="descr">Hardware timeout for flash. The
+ flash strobe is stopped after this period of time has
+ passed from the start of the strobe.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_FLASH_INTENSITY</constant></entry>
+ <entry>integer</entry>
+ </row>
+ <row>
+ <entry spanname="descr">Intensity of the flash strobe when
+ the flash LED is in flash mode
+ (V4L2_FLASH_LED_MODE_FLASH). The unit should be milliamps
+ (mA) if possible.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_FLASH_TORCH_INTENSITY</constant></entry>
+ <entry>integer</entry>
+ </row>
+ <row>
+ <entry spanname="descr">Intensity of the flash LED in
+ torch mode (V4L2_FLASH_LED_MODE_TORCH). The unit should be
+ milliamps (mA) if possible. Setting this control may not
+ be possible in presence of some faults. See
+ V4L2_CID_FLASH_FAULT.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_FLASH_INDICATOR_INTENSITY</constant></entry>
+ <entry>integer</entry>
+ </row>
+ <row>
+ <entry spanname="descr">Intensity of the indicator LED.
+ The indicator LED may be fully independent of the flash
+ LED. The unit should be microamps (uA) if possible.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_FLASH_FAULT</constant></entry>
+ <entry>bitmask</entry>
+ </row>
+ <row>
+ <entry spanname="descr">Faults related to the flash. The
+ faults tell about specific problems in the flash chip
+ itself or the LEDs attached to it. Faults may prevent
+ further use of some of the flash controls. In particular,
+ V4L2_CID_FLASH_LED_MODE is set to V4L2_FLASH_LED_MODE_NONE
+ if the fault affects the flash LED. Exactly which faults
+ have such an effect is chip dependent. Reading the faults
+ resets the control and returns the chip to a usable state
+ if possible.</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_FLASH_FAULT_OVER_VOLTAGE</constant></entry>
+ <entry>Flash controller voltage to the flash LED
+ has exceeded the limit specific to the flash
+ controller.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_FLASH_FAULT_TIMEOUT</constant></entry>
+ <entry>The flash strobe was still on when
+ the timeout set by the user ---
+ V4L2_CID_FLASH_TIMEOUT control --- has expired.
+ Not all flash controllers may set this in all
+ such conditions.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_FLASH_FAULT_OVER_TEMPERATURE</constant></entry>
+ <entry>The flash controller has overheated.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_FLASH_FAULT_SHORT_CIRCUIT</constant></entry>
+ <entry>The short circuit protection of the flash
+ controller has been triggered.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_FLASH_FAULT_OVER_CURRENT</constant></entry>
+ <entry>Current in the LED power supply has exceeded the limit
+ specific to the flash controller.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_FLASH_FAULT_INDICATOR</constant></entry>
+ <entry>The flash controller has detected a short or open
+ circuit condition on the indicator LED.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_FLASH_FAULT_UNDER_VOLTAGE</constant></entry>
+ <entry>Flash controller voltage to the flash LED
+ has been below the minimum limit specific to the flash
+ controller.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_FLASH_FAULT_INPUT_VOLTAGE</constant></entry>
+ <entry>The input voltage of the flash controller is below
+ the limit under which strobing the flash at full current
+ will not be possible.The condition persists until this flag
+ is no longer set.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_FLASH_FAULT_LED_OVER_TEMPERATURE</constant></entry>
+ <entry>The temperature of the LED has exceeded its
+ allowed upper limit.</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_FLASH_CHARGE</constant></entry>
+ <entry>boolean</entry>
+ </row>
+ <row><entry spanname="descr">Enable or disable charging of the xenon
+ flash capacitor.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_FLASH_READY</constant></entry>
+ <entry>boolean</entry>
+ </row>
+ <row>
+ <entry spanname="descr">Is the flash ready to strobe?
+ Xenon flashes require their capacitors charged before
+ strobing. LED flashes often require a cooldown period
+ after strobe during which another strobe will not be
+ possible. This is a read-only control.</entry>
+ </row>
+ <row><entry></entry></row>
+ </tbody>
+ </tgroup>
+ </table>
+ </section>
+ </section>
+ </section>
+
+ <section id="jpeg-controls">
+ <title>JPEG Control Reference</title>
+ <para>The JPEG class includes controls for common features of JPEG
+ encoders and decoders. Currently it includes features for codecs
+ implementing progressive baseline DCT compression process with
+ Huffman entrophy coding.</para>
+ <table pgwide="1" frame="none" id="jpeg-control-id">
+ <title>JPEG Control IDs</title>
+
+ <tgroup cols="4">
+ <colspec colname="c1" colwidth="1*" />
+ <colspec colname="c2" colwidth="6*" />
+ <colspec colname="c3" colwidth="2*" />
+ <colspec colname="c4" colwidth="6*" />
+ <spanspec namest="c1" nameend="c2" spanname="id" />
+ <spanspec namest="c2" nameend="c4" spanname="descr" />
+ <thead>
+ <row>
+ <entry spanname="id" align="left">ID</entry>
+ <entry align="left">Type</entry>
+ </row><row rowsep="1"><entry spanname="descr" align="left">Description</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_JPEG_CLASS</constant>&nbsp;</entry>
+ <entry>class</entry>
+ </row><row><entry spanname="descr">The JPEG class descriptor. Calling
+ &VIDIOC-QUERYCTRL; for this control will return a description of this
+ control class.
+
+ </entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_JPEG_CHROMA_SUBSAMPLING</constant></entry>
+ <entry>menu</entry>
+ </row>
+ <row id="v4l2-jpeg-chroma-subsampling">
+ <entry spanname="descr">The chroma subsampling factors describe how
+ each component of an input image is sampled, in respect to maximum
+ sample rate in each spatial dimension. See <xref linkend="itu-t81"/>,
+ clause A.1.1. for more details. The <constant>
+ V4L2_CID_JPEG_CHROMA_SUBSAMPLING</constant> control determines how
+ Cb and Cr components are downsampled after coverting an input image
+ from RGB to Y'CbCr color space.
+ </entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_JPEG_CHROMA_SUBSAMPLING_444</constant>
+ </entry><entry>No chroma subsampling, each pixel has
+ Y, Cr and Cb values.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_JPEG_CHROMA_SUBSAMPLING_422</constant>
+ </entry><entry>Horizontally subsample Cr, Cb components
+ by a factor of 2.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_JPEG_CHROMA_SUBSAMPLING_420</constant>
+ </entry><entry>Subsample Cr, Cb components horizontally
+ and vertically by 2.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_JPEG_CHROMA_SUBSAMPLING_411</constant>
+ </entry><entry>Horizontally subsample Cr, Cb components
+ by a factor of 4.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_JPEG_CHROMA_SUBSAMPLING_410</constant>
+ </entry><entry>Subsample Cr, Cb components horizontally
+ by 4 and vertically by 2.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_JPEG_CHROMA_SUBSAMPLING_GRAY</constant>
+ </entry><entry>Use only luminance component.</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_JPEG_RESTART_INTERVAL</constant>
+ </entry><entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">
+ The restart interval determines an interval of inserting RSTm
+ markers (m = 0..7). The purpose of these markers is to additionally
+ reinitialize the encoder process, in order to process blocks of
+ an image independently.
+ For the lossy compression processes the restart interval unit is
+ MCU (Minimum Coded Unit) and its value is contained in DRI
+ (Define Restart Interval) marker. If <constant>
+ V4L2_CID_JPEG_RESTART_INTERVAL</constant> control is set to 0,
+ DRI and RSTm markers will not be inserted.
+ </entry>
+ </row>
+ <row id="jpeg-quality-control">
+ <entry spanname="id"><constant>V4L2_CID_JPEG_COMPRESSION_QUALITY</constant></entry>
+ <entry>integer</entry>
+ </row>
+ <row>
+ <entry spanname="descr">
+ <constant>V4L2_CID_JPEG_COMPRESSION_QUALITY</constant> control
+ determines trade-off between image quality and size.
+ It provides simpler method for applications to control image quality,
+ without a need for direct reconfiguration of luminance and chrominance
+ quantization tables.
+
+ In cases where a driver uses quantization tables configured directly
+ by an application, using interfaces defined elsewhere, <constant>
+ V4L2_CID_JPEG_COMPRESSION_QUALITY</constant> control should be set
+ by driver to 0.
+
+ <para>The value range of this control is driver-specific. Only
+ positive, non-zero values are meaningful. The recommended range
+ is 1 - 100, where larger values correspond to better image quality.
+ </para>
+ </entry>
+ </row>
+ <row id="jpeg-active-marker-control">
+ <entry spanname="id"><constant>V4L2_CID_JPEG_ACTIVE_MARKER</constant></entry>
+ <entry>bitmask</entry>
+ </row>
+ <row>
+ <entry spanname="descr">Specify which JPEG markers are included
+ in compressed stream. This control is valid only for encoders.
+ </entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_JPEG_ACTIVE_MARKER_APP0</constant></entry>
+ <entry>Application data segment APP<subscript>0</subscript>.</entry>
+ </row><row>
+ <entry><constant>V4L2_JPEG_ACTIVE_MARKER_APP1</constant></entry>
+ <entry>Application data segment APP<subscript>1</subscript>.</entry>
+ </row><row>
+ <entry><constant>V4L2_JPEG_ACTIVE_MARKER_COM</constant></entry>
+ <entry>Comment segment.</entry>
+ </row><row>
+ <entry><constant>V4L2_JPEG_ACTIVE_MARKER_DQT</constant></entry>
+ <entry>Quantization tables segment.</entry>
+ </row><row>
+ <entry><constant>V4L2_JPEG_ACTIVE_MARKER_DHT</constant></entry>
+ <entry>Huffman tables segment.</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+ <row><entry></entry></row>
+ </tbody>
+ </tgroup>
+ </table>
+ <para>For more details about JPEG specification, refer
+ to <xref linkend="itu-t81"/>, <xref linkend="jfif"/>,
+ <xref linkend="w3c-jpeg-jfif"/>.</para>
+ </section>
+
+ <section id="image-source-controls">
+ <title>Image Source Control Reference</title>
+
+ <note>
+ <title>Experimental</title>
+
+ <para>This is an <link
+ linkend="experimental">experimental</link> interface and may
+ change in the future.</para>
+ </note>
+
+ <para>
+ The Image Source control class is intended for low-level
+ control of image source devices such as image sensors. The
+ devices feature an analogue to digital converter and a bus
+ transmitter to transmit the image data out of the device.
+ </para>
+
+ <table pgwide="1" frame="none" id="image-source-control-id">
+ <title>Image Source Control IDs</title>
+
+ <tgroup cols="4">
+ <colspec colname="c1" colwidth="1*" />
+ <colspec colname="c2" colwidth="6*" />
+ <colspec colname="c3" colwidth="2*" />
+ <colspec colname="c4" colwidth="6*" />
+ <spanspec namest="c1" nameend="c2" spanname="id" />
+ <spanspec namest="c2" nameend="c4" spanname="descr" />
+ <thead>
+ <row>
+ <entry spanname="id" align="left">ID</entry>
+ <entry align="left">Type</entry>
+ </row><row rowsep="1"><entry spanname="descr" align="left">Description</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_IMAGE_SOURCE_CLASS</constant></entry>
+ <entry>class</entry>
+ </row>
+ <row>
+ <entry spanname="descr">The IMAGE_SOURCE class descriptor.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_VBLANK</constant></entry>
+ <entry>integer</entry>
+ </row>
+ <row>
+ <entry spanname="descr">Vertical blanking. The idle period
+ after every frame during which no image data is produced.
+ The unit of vertical blanking is a line. Every line has
+ length of the image width plus horizontal blanking at the
+ pixel rate defined by
+ <constant>V4L2_CID_PIXEL_RATE</constant> control in the
+ same sub-device.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_HBLANK</constant></entry>
+ <entry>integer</entry>
+ </row>
+ <row>
+ <entry spanname="descr">Horizontal blanking. The idle
+ period after every line of image data during which no
+ image data is produced. The unit of horizontal blanking is
+ pixels.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_ANALOGUE_GAIN</constant></entry>
+ <entry>integer</entry>
+ </row>
+ <row>
+ <entry spanname="descr">Analogue gain is gain affecting
+ all colour components in the pixel matrix. The gain
+ operation is performed in the analogue domain before A/D
+ conversion.
+ </entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_TEST_PATTERN_RED</constant></entry>
+ <entry>integer</entry>
+ </row>
+ <row>
+ <entry spanname="descr">Test pattern red colour component.
+ </entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_TEST_PATTERN_GREENR</constant></entry>
+ <entry>integer</entry>
+ </row>
+ <row>
+ <entry spanname="descr">Test pattern green (next to red)
+ colour component.
+ </entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_TEST_PATTERN_BLUE</constant></entry>
+ <entry>integer</entry>
+ </row>
+ <row>
+ <entry spanname="descr">Test pattern blue colour component.
+ </entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_TEST_PATTERN_GREENB</constant></entry>
+ <entry>integer</entry>
+ </row>
+ <row>
+ <entry spanname="descr">Test pattern green (next to blue)
+ colour component.
+ </entry>
+ </row>
+ <row><entry></entry></row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ </section>
+
+ <section id="image-process-controls">
+ <title>Image Process Control Reference</title>
+
+ <note>
+ <title>Experimental</title>
+
+ <para>This is an <link
+ linkend="experimental">experimental</link> interface and may
+ change in the future.</para>
+ </note>
+
+ <para>
+ The Image Source control class is intended for low-level control of
+ image processing functions. Unlike
+ <constant>V4L2_CID_IMAGE_SOURCE_CLASS</constant>, the controls in
+ this class affect processing the image, and do not control capturing
+ of it.
+ </para>
+
+ <table pgwide="1" frame="none" id="image-process-control-id">
+ <title>Image Source Control IDs</title>
+
+ <tgroup cols="4">
+ <colspec colname="c1" colwidth="1*" />
+ <colspec colname="c2" colwidth="6*" />
+ <colspec colname="c3" colwidth="2*" />
+ <colspec colname="c4" colwidth="6*" />
+ <spanspec namest="c1" nameend="c2" spanname="id" />
+ <spanspec namest="c2" nameend="c4" spanname="descr" />
+ <thead>
+ <row>
+ <entry spanname="id" align="left">ID</entry>
+ <entry align="left">Type</entry>
+ </row><row rowsep="1"><entry spanname="descr" align="left">Description</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_IMAGE_PROC_CLASS</constant></entry>
+ <entry>class</entry>
+ </row>
+ <row>
+ <entry spanname="descr">The IMAGE_PROC class descriptor.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_LINK_FREQ</constant></entry>
+ <entry>integer menu</entry>
+ </row>
+ <row>
+ <entry spanname="descr">Data bus frequency. Together with the
+ media bus pixel code, bus type (clock cycles per sample), the
+ data bus frequency defines the pixel rate
+ (<constant>V4L2_CID_PIXEL_RATE</constant>) in the
+ pixel array (or possibly elsewhere, if the device is not an
+ image sensor). The frame rate can be calculated from the pixel
+ clock, image width and height and horizontal and vertical
+ blanking. While the pixel rate control may be defined elsewhere
+ than in the subdev containing the pixel array, the frame rate
+ cannot be obtained from that information. This is because only
+ on the pixel array it can be assumed that the vertical and
+ horizontal blanking information is exact: no other blanking is
+ allowed in the pixel array. The selection of frame rate is
+ performed by selecting the desired horizontal and vertical
+ blanking. The unit of this control is Hz. </entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_PIXEL_RATE</constant></entry>
+ <entry>64-bit integer</entry>
+ </row>
+ <row>
+ <entry spanname="descr">Pixel rate in the source pads of
+ the subdev. This control is read-only and its unit is
+ pixels / second.
+ </entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_TEST_PATTERN</constant></entry>
+ <entry>menu</entry>
+ </row>
+ <row id="v4l2-test-pattern">
+ <entry spanname="descr"> Some capture/display/sensor devices have
+ the capability to generate test pattern images. These hardware
+ specific test patterns can be used to test if a device is working
+ properly.</entry>
+ </row>
+ <row><entry></entry></row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ </section>
+
+ <section id="dv-controls">
+ <title>Digital Video Control Reference</title>
+
+ <note>
+ <title>Experimental</title>
+
+ <para>This is an <link
+ linkend="experimental">experimental</link> interface and may
+ change in the future.</para>
+ </note>
+
+ <para>
+ The Digital Video control class is intended to control receivers
+ and transmitters for <ulink url="http://en.wikipedia.org/wiki/Vga">VGA</ulink>,
+ <ulink url="http://en.wikipedia.org/wiki/Digital_Visual_Interface">DVI</ulink>
+ (Digital Visual Interface), HDMI (<xref linkend="hdmi" />) and DisplayPort (<xref linkend="dp" />).
+ These controls are generally expected to be private to the receiver or transmitter
+ subdevice that implements them, so they are only exposed on the
+ <filename>/dev/v4l-subdev*</filename> device node.
+ </para>
+
+ <para>Note that these devices can have multiple input or output pads which are
+ hooked up to e.g. HDMI connectors. Even though the subdevice will receive or
+ transmit video from/to only one of those pads, the other pads can still be
+ active when it comes to EDID (Extended Display Identification Data,
+ <xref linkend="vesaedid" />) and HDCP (High-bandwidth Digital Content
+ Protection System, <xref linkend="hdcp" />) processing, allowing the device
+ to do the fairly slow EDID/HDCP handling in advance. This allows for quick
+ switching between connectors.</para>
+
+ <para>These pads appear in several of the controls in this section as
+ bitmasks, one bit for each pad. Bit 0 corresponds to pad 0, bit 1 to pad 1,
+ etc. The maximum value of the control is the set of valid pads.</para>
+
+ <table pgwide="1" frame="none" id="dv-control-id">
+ <title>Digital Video Control IDs</title>
+
+ <tgroup cols="4">
+ <colspec colname="c1" colwidth="1*" />
+ <colspec colname="c2" colwidth="6*" />
+ <colspec colname="c3" colwidth="2*" />
+ <colspec colname="c4" colwidth="6*" />
+ <spanspec namest="c1" nameend="c2" spanname="id" />
+ <spanspec namest="c2" nameend="c4" spanname="descr" />
+ <thead>
+ <row>
+ <entry spanname="id" align="left">ID</entry>
+ <entry align="left">Type</entry>
+ </row><row rowsep="1"><entry spanname="descr" align="left">Description</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_DV_CLASS</constant></entry>
+ <entry>class</entry>
+ </row>
+ <row>
+ <entry spanname="descr">The Digital Video class descriptor.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_DV_TX_HOTPLUG</constant></entry>
+ <entry>bitmask</entry>
+ </row>
+ <row>
+ <entry spanname="descr">Many connectors have a hotplug pin which is high
+ if EDID information is available from the source. This control shows the
+ state of the hotplug pin as seen by the transmitter.
+ Each bit corresponds to an output pad on the transmitter. If an output pad
+ does not have an associated hotplug pin, then the bit for that pad will be 0.
+ This read-only control is applicable to DVI-D, HDMI and DisplayPort connectors.
+ </entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_DV_TX_RXSENSE</constant></entry>
+ <entry>bitmask</entry>
+ </row>
+ <row>
+ <entry spanname="descr">Rx Sense is the detection of pull-ups on the TMDS
+ clock lines. This normally means that the sink has left/entered standby (i.e.
+ the transmitter can sense that the receiver is ready to receive video).
+ Each bit corresponds to an output pad on the transmitter. If an output pad
+ does not have an associated Rx Sense, then the bit for that pad will be 0.
+ This read-only control is applicable to DVI-D and HDMI devices.
+ </entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_DV_TX_EDID_PRESENT</constant></entry>
+ <entry>bitmask</entry>
+ </row>
+ <row>
+ <entry spanname="descr">When the transmitter sees the hotplug signal from the
+ receiver it will attempt to read the EDID. If set, then the transmitter has read
+ at least the first block (= 128 bytes).
+ Each bit corresponds to an output pad on the transmitter. If an output pad
+ does not support EDIDs, then the bit for that pad will be 0.
+ This read-only control is applicable to VGA, DVI-A/D, HDMI and DisplayPort connectors.
+ </entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_DV_TX_MODE</constant></entry>
+ <entry id="v4l2-dv-tx-mode">enum v4l2_dv_tx_mode</entry>
+ </row>
+ <row>
+ <entry spanname="descr">HDMI transmitters can transmit in DVI-D mode (just video)
+ or in HDMI mode (video + audio + auxiliary data). This control selects which mode
+ to use: V4L2_DV_TX_MODE_DVI_D or V4L2_DV_TX_MODE_HDMI.
+ This control is applicable to HDMI connectors.
+ </entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_DV_TX_RGB_RANGE</constant></entry>
+ <entry id="v4l2-dv-rgb-range">enum v4l2_dv_rgb_range</entry>
+ </row>
+ <row>
+ <entry spanname="descr">Select the quantization range for RGB output. V4L2_DV_RANGE_AUTO
+ follows the RGB quantization range specified in the standard for the video interface
+ (ie. <xref linkend="cea861" /> for HDMI). V4L2_DV_RANGE_LIMITED and V4L2_DV_RANGE_FULL override the standard
+ to be compatible with sinks that have not implemented the standard correctly
+ (unfortunately quite common for HDMI and DVI-D). Full range allows all possible values to be
+ used whereas limited range sets the range to (16 &lt;&lt; (N-8)) - (235 &lt;&lt; (N-8))
+ where N is the number of bits per component.
+ This control is applicable to VGA, DVI-A/D, HDMI and DisplayPort connectors.
+ </entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_DV_RX_POWER_PRESENT</constant></entry>
+ <entry>bitmask</entry>
+ </row>
+ <row>
+ <entry spanname="descr">Detects whether the receiver receives power from the source
+ (e.g. HDMI carries 5V on one of the pins). This is often used to power an eeprom
+ which contains EDID information, such that the source can read the EDID even if
+ the sink is in standby/power off.
+ Each bit corresponds to an input pad on the transmitter. If an input pad
+ cannot detect whether power is present, then the bit for that pad will be 0.
+ This read-only control is applicable to DVI-D, HDMI and DisplayPort connectors.
+ </entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_DV_RX_RGB_RANGE</constant></entry>
+ <entry>enum v4l2_dv_rgb_range</entry>
+ </row>
+ <row>
+ <entry spanname="descr">Select the quantization range for RGB input. V4L2_DV_RANGE_AUTO
+ follows the RGB quantization range specified in the standard for the video interface
+ (ie. <xref linkend="cea861" /> for HDMI). V4L2_DV_RANGE_LIMITED and V4L2_DV_RANGE_FULL override the standard
+ to be compatible with sources that have not implemented the standard correctly
+ (unfortunately quite common for HDMI and DVI-D). Full range allows all possible values to be
+ used whereas limited range sets the range to (16 &lt;&lt; (N-8)) - (235 &lt;&lt; (N-8))
+ where N is the number of bits per component.
+ This control is applicable to VGA, DVI-A/D, HDMI and DisplayPort connectors.
+ </entry>
+ </row>
+ <row><entry></entry></row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ </section>
+
+ <section id="fm-rx-controls">
+ <title>FM Receiver Control Reference</title>
+
+ <para>The FM Receiver (FM_RX) class includes controls for common features of
+ FM Reception capable devices.</para>
+
+ <table pgwide="1" frame="none" id="fm-rx-control-id">
+ <title>FM_RX Control IDs</title>
+
+ <tgroup cols="4">
+ <colspec colname="c1" colwidth="1*" />
+ <colspec colname="c2" colwidth="6*" />
+ <colspec colname="c3" colwidth="2*" />
+ <colspec colname="c4" colwidth="6*" />
+ <spanspec namest="c1" nameend="c2" spanname="id" />
+ <spanspec namest="c2" nameend="c4" spanname="descr" />
+ <thead>
+ <row>
+ <entry spanname="id" align="left">ID</entry>
+ <entry align="left">Type</entry>
+ </row><row rowsep="1"><entry spanname="descr" align="left">Description</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_FM_RX_CLASS</constant>&nbsp;</entry>
+ <entry>class</entry>
+ </row><row><entry spanname="descr">The FM_RX class
+descriptor. Calling &VIDIOC-QUERYCTRL; for this control will return a
+description of this control class.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_RDS_RECEPTION</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row><row><entry spanname="descr">Enables/disables RDS
+ reception by the radio tuner</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_RDS_RX_PTY</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Gets RDS Programme Type field.
+This encodes up to 31 pre-defined programme types.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_RDS_RX_PS_NAME</constant>&nbsp;</entry>
+ <entry>string</entry>
+ </row>
+ <row><entry spanname="descr">Gets the Programme Service name (PS_NAME).
+It is intended for static display on a receiver. It is the primary aid to listeners in programme service
+identification and selection. In Annex E of <xref linkend="iec62106" />, the RDS specification,
+there is a full description of the correct character encoding for Programme Service name strings.
+Also from RDS specification, PS is usually a single eight character text. However, it is also possible
+to find receivers which can scroll strings sized as 8 x N characters. So, this control must be configured
+with steps of 8 characters. The result is it must always contain a string with size multiple of 8.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_RDS_RX_RADIO_TEXT</constant>&nbsp;</entry>
+ <entry>string</entry>
+ </row>
+ <row><entry spanname="descr">Gets the Radio Text info. It is a textual description of
+what is being broadcasted. RDS Radio Text can be applied when broadcaster wishes to transmit longer PS names,
+programme-related information or any other text. In these cases, RadioText can be used in addition to
+<constant>V4L2_CID_RDS_RX_PS_NAME</constant>. The encoding for Radio Text strings is also fully described
+in Annex E of <xref linkend="iec62106" />. The length of Radio Text strings depends on which RDS Block is being
+used to transmit it, either 32 (2A block) or 64 (2B block). However, it is also possible
+to find receivers which can scroll strings sized as 32 x N or 64 x N characters. So, this control must be configured
+with steps of 32 or 64 characters. The result is it must always contain a string with size multiple of 32 or 64. </entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_RDS_RX_TRAFFIC_ANNOUNCEMENT</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row>
+ <row><entry spanname="descr">If set, then a traffic announcement is in progress.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_RDS_RX_TRAFFIC_PROGRAM</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row>
+ <row><entry spanname="descr">If set, then the tuned programme carries traffic announcements.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_RDS_RX_MUSIC_SPEECH</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row>
+ <row><entry spanname="descr">If set, then this channel broadcasts music. If cleared, then it
+broadcasts speech. If the transmitter doesn't make this distinction, then it will be set.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_TUNE_DEEMPHASIS</constant>&nbsp;</entry>
+ <entry>enum v4l2_deemphasis</entry>
+ </row>
+ <row id="v4l2-deemphasis"><entry spanname="descr">Configures the de-emphasis value for reception.
+A de-emphasis filter is applied to the broadcast to accentuate the high audio frequencies.
+Depending on the region, a time constant of either 50 or 75 useconds is used. The enum&nbsp;v4l2_deemphasis
+defines possible values for de-emphasis. Here they are:</entry>
+ </row><row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_DEEMPHASIS_DISABLED</constant>&nbsp;</entry>
+ <entry>No de-emphasis is applied.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_DEEMPHASIS_50_uS</constant>&nbsp;</entry>
+ <entry>A de-emphasis of 50 uS is used.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_DEEMPHASIS_75_uS</constant>&nbsp;</entry>
+ <entry>A de-emphasis of 75 uS is used.</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+
+ </row>
+ <row><entry></entry></row>
+ </tbody>
+ </tgroup>
+ </table>
+ </section>
+
+ <section id="detect-controls">
+ <title>Detect Control Reference</title>
+
+ <para>The Detect class includes controls for common features of
+ various motion or object detection capable devices.</para>
+
+ <table pgwide="1" frame="none" id="detect-control-id">
+ <title>Detect Control IDs</title>
+
+ <tgroup cols="4">
+ <colspec colname="c1" colwidth="1*" />
+ <colspec colname="c2" colwidth="6*" />
+ <colspec colname="c3" colwidth="2*" />
+ <colspec colname="c4" colwidth="6*" />
+ <spanspec namest="c1" nameend="c2" spanname="id" />
+ <spanspec namest="c2" nameend="c4" spanname="descr" />
+ <thead>
+ <row>
+ <entry spanname="id" align="left">ID</entry>
+ <entry align="left">Type</entry>
+ </row><row rowsep="1"><entry spanname="descr" align="left">Description</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_DETECT_CLASS</constant>&nbsp;</entry>
+ <entry>class</entry>
+ </row><row><entry spanname="descr">The Detect class
+descriptor. Calling &VIDIOC-QUERYCTRL; for this control will return a
+description of this control class.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_DETECT_MD_MODE</constant>&nbsp;</entry>
+ <entry>menu</entry>
+ </row><row><entry spanname="descr">Sets the motion detection mode.</entry>
+ </row>
+ <row>
+ <entrytbl spanname="descr" cols="2">
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_DETECT_MD_MODE_DISABLED</constant>
+ </entry><entry>Disable motion detection.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_DETECT_MD_MODE_GLOBAL</constant>
+ </entry><entry>Use a single motion detection threshold.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_DETECT_MD_MODE_THRESHOLD_GRID</constant>
+ </entry><entry>The image is divided into a grid, each cell with its own
+ motion detection threshold. These thresholds are set through the
+ <constant>V4L2_CID_DETECT_MD_THRESHOLD_GRID</constant> matrix control.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_DETECT_MD_MODE_REGION_GRID</constant>
+ </entry><entry>The image is divided into a grid, each cell with its own
+ region value that specifies which per-region motion detection thresholds
+ should be used. Each region has its own thresholds. How these per-region
+ thresholds are set up is driver-specific. The region values for the grid are set
+ through the <constant>V4L2_CID_DETECT_MD_REGION_GRID</constant> matrix
+ control.</entry>
+ </row>
+ </tbody>
+ </entrytbl>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_DETECT_MD_GLOBAL_THRESHOLD</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row><entry spanname="descr">Sets the global motion detection threshold to be
+ used with the <constant>V4L2_DETECT_MD_MODE_GLOBAL</constant> motion detection mode.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_DETECT_MD_THRESHOLD_GRID</constant>&nbsp;</entry>
+ <entry>__u16 matrix</entry>
+ </row>
+ <row><entry spanname="descr">Sets the motion detection thresholds for each cell in the grid.
+ To be used with the <constant>V4L2_DETECT_MD_MODE_THRESHOLD_GRID</constant>
+ motion detection mode. Matrix element (0, 0) represents the cell at the top-left of the
+ grid.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_DETECT_MD_REGION_GRID</constant>&nbsp;</entry>
+ <entry>__u8 matrix</entry>
+ </row>
+ <row><entry spanname="descr">Sets the motion detection region value for each cell in the grid.
+ To be used with the <constant>V4L2_DETECT_MD_MODE_REGION_GRID</constant>
+ motion detection mode. Matrix element (0, 0) represents the cell at the top-left of the
+ grid.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ </section>
+
+ <section id="rf-tuner-controls">
+ <title>RF Tuner Control Reference</title>
+
+ <para>
+The RF Tuner (RF_TUNER) class includes controls for common features of devices
+having RF tuner.
+ </para>
+ <para>
+In this context, RF tuner is radio receiver circuit between antenna and
+demodulator. It receives radio frequency (RF) from the antenna and converts that
+received signal to lower intermediate frequency (IF) or baseband frequency (BB).
+Tuners that could do baseband output are often called Zero-IF tuners. Older
+tuners were typically simple PLL tuners inside a metal box, whilst newer ones
+are highly integrated chips without a metal box "silicon tuners". These controls
+are mostly applicable for new feature rich silicon tuners, just because older
+tuners does not have much adjustable features.
+ </para>
+ <para>
+For more information about RF tuners see
+<ulink url="http://en.wikipedia.org/wiki/Tuner_%28radio%29">Tuner (radio)</ulink>
+and
+<ulink url="http://en.wikipedia.org/wiki/RF_front_end">RF front end</ulink>
+from Wikipedia.
+ </para>
+
+ <table pgwide="1" frame="none" id="rf-tuner-control-id">
+ <title>RF_TUNER Control IDs</title>
+
+ <tgroup cols="4">
+ <colspec colname="c1" colwidth="1*" />
+ <colspec colname="c2" colwidth="6*" />
+ <colspec colname="c3" colwidth="2*" />
+ <colspec colname="c4" colwidth="6*" />
+ <spanspec namest="c1" nameend="c2" spanname="id" />
+ <spanspec namest="c2" nameend="c4" spanname="descr" />
+ <thead>
+ <row>
+ <entry spanname="id" align="left">ID</entry>
+ <entry align="left">Type</entry>
+ </row>
+ <row rowsep="1">
+ <entry spanname="descr" align="left">Description</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row><entry></entry></row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_RF_TUNER_CLASS</constant>&nbsp;</entry>
+ <entry>class</entry>
+ </row><row><entry spanname="descr">The RF_TUNER class
+descriptor. Calling &VIDIOC-QUERYCTRL; for this control will return a
+description of this control class.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_RF_TUNER_BANDWIDTH_AUTO</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row>
+ <row>
+ <entry spanname="descr">Enables/disables tuner radio channel
+bandwidth configuration. In automatic mode bandwidth configuration is performed
+by the driver.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_RF_TUNER_BANDWIDTH</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row>
+ <entry spanname="descr">Filter(s) on tuner signal path are used to
+filter signal according to receiving party needs. Driver configures filters to
+fulfill desired bandwidth requirement. Used when V4L2_CID_RF_TUNER_BANDWIDTH_AUTO is not
+set. Unit is in Hz. The range and step are driver-specific.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_RF_TUNER_LNA_GAIN_AUTO</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row>
+ <row>
+ <entry spanname="descr">Enables/disables LNA automatic gain control (AGC)</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row>
+ <row>
+ <entry spanname="descr">Enables/disables mixer automatic gain control (AGC)</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_RF_TUNER_IF_GAIN_AUTO</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row>
+ <row>
+ <entry spanname="descr">Enables/disables IF automatic gain control (AGC)</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_RF_TUNER_LNA_GAIN</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row>
+ <entry spanname="descr">LNA (low noise amplifier) gain is first
+gain stage on the RF tuner signal path. It is located very close to tuner
+antenna input. Used when <constant>V4L2_CID_RF_TUNER_LNA_GAIN_AUTO</constant> is not set.
+The range and step are driver-specific.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_RF_TUNER_MIXER_GAIN</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row>
+ <entry spanname="descr">Mixer gain is second gain stage on the RF
+tuner signal path. It is located inside mixer block, where RF signal is
+down-converted by the mixer. Used when <constant>V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO</constant>
+is not set. The range and step are driver-specific.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_RF_TUNER_IF_GAIN</constant>&nbsp;</entry>
+ <entry>integer</entry>
+ </row>
+ <row>
+ <entry spanname="descr">IF gain is last gain stage on the RF tuner
+signal path. It is located on output of RF tuner. It controls signal level of
+intermediate frequency output or baseband output. Used when
+<constant>V4L2_CID_RF_TUNER_IF_GAIN_AUTO</constant> is not set. The range and step are
+driver-specific.</entry>
+ </row>
+ <row>
+ <entry spanname="id"><constant>V4L2_CID_RF_TUNER_PLL_LOCK</constant>&nbsp;</entry>
+ <entry>boolean</entry>
+ </row>
+ <row>
+ <entry spanname="descr">Is synthesizer PLL locked? RF tuner is
+receiving given frequency when that control is set. This is a read-only control.
+</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </section>
+</section>
diff --git a/Documentation/DocBook/media/v4l/dev-capture.xml b/Documentation/DocBook/media/v4l/dev-capture.xml
new file mode 100644
index 000000000..e1c5f9406
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/dev-capture.xml
@@ -0,0 +1,110 @@
+ <title>Video Capture Interface</title>
+
+ <para>Video capture devices sample an analog video signal and store
+the digitized images in memory. Today nearly all devices can capture
+at full 25 or 30 frames/second. With this interface applications can
+control the capture process and move images from the driver into user
+space.</para>
+
+ <para>Conventionally V4L2 video capture devices are accessed through
+character device special files named <filename>/dev/video</filename>
+and <filename>/dev/video0</filename> to
+<filename>/dev/video63</filename> with major number 81 and minor
+numbers 0 to 63. <filename>/dev/video</filename> is typically a
+symbolic link to the preferred video device. Note the same device
+files are used for video output devices.</para>
+
+ <section>
+ <title>Querying Capabilities</title>
+
+ <para>Devices supporting the video capture interface set the
+<constant>V4L2_CAP_VIDEO_CAPTURE</constant> or
+<constant>V4L2_CAP_VIDEO_CAPTURE_MPLANE</constant> flag in the
+<structfield>capabilities</structfield> field of &v4l2-capability;
+returned by the &VIDIOC-QUERYCAP; ioctl. As secondary device functions
+they may also support the <link linkend="overlay">video overlay</link>
+(<constant>V4L2_CAP_VIDEO_OVERLAY</constant>) and the <link
+linkend="raw-vbi">raw VBI capture</link>
+(<constant>V4L2_CAP_VBI_CAPTURE</constant>) interface. At least one of
+the read/write or streaming I/O methods must be supported. Tuners and
+audio inputs are optional.</para>
+ </section>
+
+ <section>
+ <title>Supplemental Functions</title>
+
+ <para>Video capture devices shall support <link
+linkend="audio">audio input</link>, <link
+linkend="tuner">tuner</link>, <link linkend="control">controls</link>,
+<link linkend="crop">cropping and scaling</link> and <link
+linkend="streaming-par">streaming parameter</link> ioctls as needed.
+The <link linkend="video">video input</link> and <link
+linkend="standard">video standard</link> ioctls must be supported by
+all video capture devices.</para>
+ </section>
+
+ <section>
+ <title>Image Format Negotiation</title>
+
+ <para>The result of a capture operation is determined by
+cropping and image format parameters. The former select an area of the
+video picture to capture, the latter how images are stored in memory,
+&ie; in RGB or YUV format, the number of bits per pixel or width and
+height. Together they also define how images are scaled in the
+process.</para>
+
+ <para>As usual these parameters are <emphasis>not</emphasis> reset
+at &func-open; time to permit Unix tool chains, programming a device
+and then reading from it as if it was a plain file. Well written V4L2
+applications ensure they really get what they want, including cropping
+and scaling.</para>
+
+ <para>Cropping initialization at minimum requires to reset the
+parameters to defaults. An example is given in <xref
+linkend="crop" />.</para>
+
+ <para>To query the current image format applications set the
+<structfield>type</structfield> field of a &v4l2-format; to
+<constant>V4L2_BUF_TYPE_VIDEO_CAPTURE</constant> or
+<constant>V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE</constant> and call the
+&VIDIOC-G-FMT; ioctl with a pointer to this structure. Drivers fill
+the &v4l2-pix-format; <structfield>pix</structfield> or the
+&v4l2-pix-format-mplane; <structfield>pix_mp</structfield> member of the
+<structfield>fmt</structfield> union.</para>
+
+ <para>To request different parameters applications set the
+<structfield>type</structfield> field of a &v4l2-format; as above and
+initialize all fields of the &v4l2-pix-format;
+<structfield>vbi</structfield> member of the
+<structfield>fmt</structfield> union, or better just modify the
+results of <constant>VIDIOC_G_FMT</constant>, and call the
+&VIDIOC-S-FMT; ioctl with a pointer to this structure. Drivers may
+adjust the parameters and finally return the actual parameters as
+<constant>VIDIOC_G_FMT</constant> does.</para>
+
+ <para>Like <constant>VIDIOC_S_FMT</constant> the
+&VIDIOC-TRY-FMT; ioctl can be used to learn about hardware limitations
+without disabling I/O or possibly time consuming hardware
+preparations.</para>
+
+ <para>The contents of &v4l2-pix-format; and &v4l2-pix-format-mplane;
+are discussed in <xref linkend="pixfmt" />. See also the specification of the
+<constant>VIDIOC_G_FMT</constant>, <constant>VIDIOC_S_FMT</constant>
+and <constant>VIDIOC_TRY_FMT</constant> ioctls for details. Video
+capture devices must implement both the
+<constant>VIDIOC_G_FMT</constant> and
+<constant>VIDIOC_S_FMT</constant> ioctl, even if
+<constant>VIDIOC_S_FMT</constant> ignores all requests and always
+returns default parameters as <constant>VIDIOC_G_FMT</constant> does.
+<constant>VIDIOC_TRY_FMT</constant> is optional.</para>
+ </section>
+
+ <section>
+ <title>Reading Images</title>
+
+ <para>A video capture device may support the <link
+linkend="rw">read() function</link> and/or streaming (<link
+linkend="mmap">memory mapping</link> or <link
+linkend="userp">user pointer</link>) I/O. See <xref
+linkend="io" /> for details.</para>
+ </section>
diff --git a/Documentation/DocBook/media/v4l/dev-codec.xml b/Documentation/DocBook/media/v4l/dev-codec.xml
new file mode 100644
index 000000000..ff44c16fc
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/dev-codec.xml
@@ -0,0 +1,27 @@
+ <title>Codec Interface</title>
+
+ <para>A V4L2 codec can compress, decompress, transform, or otherwise
+convert video data from one format into another format, in memory. Typically
+such devices are memory-to-memory devices (i.e. devices with the
+<constant>V4L2_CAP_VIDEO_M2M</constant> or <constant>V4L2_CAP_VIDEO_M2M_MPLANE</constant>
+capability set).
+</para>
+
+ <para>A memory-to-memory video node acts just like a normal video node, but it
+supports both output (sending frames from memory to the codec hardware) and
+capture (receiving the processed frames from the codec hardware into memory)
+stream I/O. An application will have to setup the stream
+I/O for both sides and finally call &VIDIOC-STREAMON; for both capture and output
+to start the codec.</para>
+
+ <para>Video compression codecs use the MPEG controls to setup their codec parameters
+(note that the MPEG controls actually support many more codecs than just MPEG).
+See <xref linkend="mpeg-controls"></xref>.</para>
+
+ <para>Memory-to-memory devices can often be used as a shared resource: you can
+open the video node multiple times, each application setting up their own codec properties
+that are local to the file handle, and each can use it independently from the others.
+The driver will arbitrate access to the codec and reprogram it whenever another file
+handler gets access. This is different from the usual video node behavior where the video properties
+are global to the device (i.e. changing something through one file handle is visible
+through another file handle).</para>
diff --git a/Documentation/DocBook/media/v4l/dev-effect.xml b/Documentation/DocBook/media/v4l/dev-effect.xml
new file mode 100644
index 000000000..2350a67c0
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/dev-effect.xml
@@ -0,0 +1,17 @@
+ <title>Effect Devices Interface</title>
+
+ <note>
+ <title>Suspended</title>
+
+ <para>This interface has been be suspended from the V4L2 API
+implemented in Linux 2.6 until we have more experience with effect
+device interfaces.</para>
+ </note>
+
+ <para>A V4L2 video effect device can do image effects, filtering, or
+combine two or more images or image streams. For example video
+transitions or wipes. Applications send data to be processed and
+receive the result data either with &func-read; and &func-write;
+functions, or through the streaming I/O mechanism.</para>
+
+ <para>[to do]</para>
diff --git a/Documentation/DocBook/media/v4l/dev-event.xml b/Documentation/DocBook/media/v4l/dev-event.xml
new file mode 100644
index 000000000..19f4becfa
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/dev-event.xml
@@ -0,0 +1,43 @@
+ <title>Event Interface</title>
+
+ <para>The V4L2 event interface provides a means for a user to get
+ immediately notified on certain conditions taking place on a device.
+ This might include start of frame or loss of signal events, for
+ example. Changes in the value or state of a V4L2 control can also be
+ reported through events.
+ </para>
+
+ <para>To receive events, the events the user is interested in first must
+ be subscribed using the &VIDIOC-SUBSCRIBE-EVENT; ioctl. Once an event is
+ subscribed, the events of subscribed types are dequeueable using the
+ &VIDIOC-DQEVENT; ioctl. Events may be unsubscribed using
+ VIDIOC_UNSUBSCRIBE_EVENT ioctl. The special event type V4L2_EVENT_ALL may
+ be used to unsubscribe all the events the driver supports.</para>
+
+ <para>The event subscriptions and event queues are specific to file
+ handles. Subscribing an event on one file handle does not affect
+ other file handles.</para>
+
+ <para>The information on dequeueable events is obtained by using select or
+ poll system calls on video devices. The V4L2 events use POLLPRI events on
+ poll system call and exceptions on select system call.</para>
+
+ <para>Starting with kernel 3.1 certain guarantees can be given with
+ regards to events:<orderedlist>
+ <listitem>
+ <para>Each subscribed event has its own internal dedicated event queue.
+This means that flooding of one event type will not interfere with other
+event types.</para>
+ </listitem>
+ <listitem>
+ <para>If the internal event queue for a particular subscribed event
+becomes full, then the oldest event in that queue will be dropped.</para>
+ </listitem>
+ <listitem>
+ <para>Where applicable, certain event types can ensure that the payload
+of the oldest event that is about to be dropped will be merged with the payload
+of the next oldest event. Thus ensuring that no information is lost, but only an
+intermediate step leading up to that information. See the documentation for the
+event you want to subscribe to whether this is applicable for that event or not.</para>
+ </listitem>
+ </orderedlist></para>
diff --git a/Documentation/DocBook/media/v4l/dev-osd.xml b/Documentation/DocBook/media/v4l/dev-osd.xml
new file mode 100644
index 000000000..548533291
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/dev-osd.xml
@@ -0,0 +1,149 @@
+ <title>Video Output Overlay Interface</title>
+ <subtitle>Also known as On-Screen Display (OSD)</subtitle>
+
+ <para>Some video output devices can overlay a framebuffer image onto
+the outgoing video signal. Applications can set up such an overlay
+using this interface, which borrows structures and ioctls of the <link
+linkend="overlay">Video Overlay</link> interface.</para>
+
+ <para>The OSD function is accessible through the same character
+special file as the <link linkend="capture">Video Output</link> function.
+Note the default function of such a <filename>/dev/video</filename> device
+is video capturing or output. The OSD function is only available after
+calling the &VIDIOC-S-FMT; ioctl.</para>
+
+ <section>
+ <title>Querying Capabilities</title>
+
+ <para>Devices supporting the <wordasword>Video Output
+Overlay</wordasword> interface set the
+<constant>V4L2_CAP_VIDEO_OUTPUT_OVERLAY</constant> flag in the
+<structfield>capabilities</structfield> field of &v4l2-capability;
+returned by the &VIDIOC-QUERYCAP; ioctl.</para>
+ </section>
+
+ <section>
+ <title>Framebuffer</title>
+
+ <para>Contrary to the <wordasword>Video Overlay</wordasword>
+interface the framebuffer is normally implemented on the TV card and
+not the graphics card. On Linux it is accessible as a framebuffer
+device (<filename>/dev/fbN</filename>). Given a V4L2 device,
+applications can find the corresponding framebuffer device by calling
+the &VIDIOC-G-FBUF; ioctl. It returns, amongst other information, the
+physical address of the framebuffer in the
+<structfield>base</structfield> field of &v4l2-framebuffer;. The
+framebuffer device ioctl <constant>FBIOGET_FSCREENINFO</constant>
+returns the same address in the <structfield>smem_start</structfield>
+field of struct <structname>fb_fix_screeninfo</structname>. The
+<constant>FBIOGET_FSCREENINFO</constant> ioctl and struct
+<structname>fb_fix_screeninfo</structname> are defined in the
+<filename>linux/fb.h</filename> header file.</para>
+
+ <para>The width and height of the framebuffer depends on the
+current video standard. A V4L2 driver may reject attempts to change
+the video standard (or any other ioctl which would imply a framebuffer
+size change) with an &EBUSY; until all applications closed the
+framebuffer device.</para>
+
+ <example>
+ <title>Finding a framebuffer device for OSD</title>
+
+ <programlisting>
+#include &lt;linux/fb.h&gt;
+
+&v4l2-framebuffer; fbuf;
+unsigned int i;
+int fb_fd;
+
+if (-1 == ioctl(fd, VIDIOC_G_FBUF, &amp;fbuf)) {
+ perror("VIDIOC_G_FBUF");
+ exit(EXIT_FAILURE);
+}
+
+for (i = 0; i &lt; 30; i++) {
+ char dev_name[16];
+ struct fb_fix_screeninfo si;
+
+ snprintf(dev_name, sizeof(dev_name), "/dev/fb%u", i);
+
+ fb_fd = open(dev_name, O_RDWR);
+ if (-1 == fb_fd) {
+ switch (errno) {
+ case ENOENT: /* no such file */
+ case ENXIO: /* no driver */
+ continue;
+
+ default:
+ perror("open");
+ exit(EXIT_FAILURE);
+ }
+ }
+
+ if (0 == ioctl(fb_fd, FBIOGET_FSCREENINFO, &amp;si)) {
+ if (si.smem_start == (unsigned long)fbuf.base)
+ break;
+ } else {
+ /* Apparently not a framebuffer device. */
+ }
+
+ close(fb_fd);
+ fb_fd = -1;
+}
+
+/* fb_fd is the file descriptor of the framebuffer device
+ for the video output overlay, or -1 if no device was found. */
+</programlisting>
+ </example>
+ </section>
+
+ <section>
+ <title>Overlay Window and Scaling</title>
+
+ <para>The overlay is controlled by source and target rectangles.
+The source rectangle selects a subsection of the framebuffer image to
+be overlaid, the target rectangle an area in the outgoing video signal
+where the image will appear. Drivers may or may not support scaling,
+and arbitrary sizes and positions of these rectangles. Further drivers
+may support any (or none) of the clipping/blending methods defined for
+the <link linkend="overlay">Video Overlay</link> interface.</para>
+
+ <para>A &v4l2-window; defines the size of the source rectangle,
+its position in the framebuffer and the clipping/blending method to be
+used for the overlay. To get the current parameters applications set
+the <structfield>type</structfield> field of a &v4l2-format; to
+<constant>V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY</constant> and call the
+&VIDIOC-G-FMT; ioctl. The driver fills the
+<structname>v4l2_window</structname> substructure named
+<structfield>win</structfield>. It is not possible to retrieve a
+previously programmed clipping list or bitmap.</para>
+
+ <para>To program the source rectangle applications set the
+<structfield>type</structfield> field of a &v4l2-format; to
+<constant>V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY</constant>, initialize
+the <structfield>win</structfield> substructure and call the
+&VIDIOC-S-FMT; ioctl. The driver adjusts the parameters against
+hardware limits and returns the actual parameters as
+<constant>VIDIOC_G_FMT</constant> does. Like
+<constant>VIDIOC_S_FMT</constant>, the &VIDIOC-TRY-FMT; ioctl can be
+used to learn about driver capabilities without actually changing
+driver state. Unlike <constant>VIDIOC_S_FMT</constant> this also works
+after the overlay has been enabled.</para>
+
+ <para>A &v4l2-crop; defines the size and position of the target
+rectangle. The scaling factor of the overlay is implied by the width
+and height given in &v4l2-window; and &v4l2-crop;. The cropping API
+applies to <wordasword>Video Output</wordasword> and <wordasword>Video
+Output Overlay</wordasword> devices in the same way as to
+<wordasword>Video Capture</wordasword> and <wordasword>Video
+Overlay</wordasword> devices, merely reversing the direction of the
+data flow. For more information see <xref linkend="crop" />.</para>
+ </section>
+
+ <section>
+ <title>Enabling Overlay</title>
+
+ <para>There is no V4L2 ioctl to enable or disable the overlay,
+however the framebuffer interface of the driver may support the
+<constant>FBIOBLANK</constant> ioctl.</para>
+ </section>
diff --git a/Documentation/DocBook/media/v4l/dev-output.xml b/Documentation/DocBook/media/v4l/dev-output.xml
new file mode 100644
index 000000000..9130a3dc7
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/dev-output.xml
@@ -0,0 +1,106 @@
+ <title>Video Output Interface</title>
+
+ <para>Video output devices encode stills or image sequences as
+analog video signal. With this interface applications can
+control the encoding process and move images from user space to
+the driver.</para>
+
+ <para>Conventionally V4L2 video output devices are accessed through
+character device special files named <filename>/dev/video</filename>
+and <filename>/dev/video0</filename> to
+<filename>/dev/video63</filename> with major number 81 and minor
+numbers 0 to 63. <filename>/dev/video</filename> is typically a
+symbolic link to the preferred video device. Note the same device
+files are used for video capture devices.</para>
+
+ <section>
+ <title>Querying Capabilities</title>
+
+ <para>Devices supporting the video output interface set the
+<constant>V4L2_CAP_VIDEO_OUTPUT</constant> or
+<constant>V4L2_CAP_VIDEO_OUTPUT_MPLANE</constant> flag in the
+<structfield>capabilities</structfield> field of &v4l2-capability;
+returned by the &VIDIOC-QUERYCAP; ioctl. As secondary device functions
+they may also support the <link linkend="raw-vbi">raw VBI
+output</link> (<constant>V4L2_CAP_VBI_OUTPUT</constant>) interface. At
+least one of the read/write or streaming I/O methods must be
+supported. Modulators and audio outputs are optional.</para>
+ </section>
+
+ <section>
+ <title>Supplemental Functions</title>
+
+ <para>Video output devices shall support <link
+linkend="audio">audio output</link>, <link
+linkend="tuner">modulator</link>, <link linkend="control">controls</link>,
+<link linkend="crop">cropping and scaling</link> and <link
+linkend="streaming-par">streaming parameter</link> ioctls as needed.
+The <link linkend="video">video output</link> and <link
+linkend="standard">video standard</link> ioctls must be supported by
+all video output devices.</para>
+ </section>
+
+ <section>
+ <title>Image Format Negotiation</title>
+
+ <para>The output is determined by cropping and image format
+parameters. The former select an area of the video picture where the
+image will appear, the latter how images are stored in memory, &ie; in
+RGB or YUV format, the number of bits per pixel or width and height.
+Together they also define how images are scaled in the process.</para>
+
+ <para>As usual these parameters are <emphasis>not</emphasis> reset
+at &func-open; time to permit Unix tool chains, programming a device
+and then writing to it as if it was a plain file. Well written V4L2
+applications ensure they really get what they want, including cropping
+and scaling.</para>
+
+ <para>Cropping initialization at minimum requires to reset the
+parameters to defaults. An example is given in <xref
+linkend="crop" />.</para>
+
+ <para>To query the current image format applications set the
+<structfield>type</structfield> field of a &v4l2-format; to
+<constant>V4L2_BUF_TYPE_VIDEO_OUTPUT</constant> or
+<constant>V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE</constant> and call the
+&VIDIOC-G-FMT; ioctl with a pointer to this structure. Drivers fill
+the &v4l2-pix-format; <structfield>pix</structfield> or the
+&v4l2-pix-format-mplane; <structfield>pix_mp</structfield> member of the
+<structfield>fmt</structfield> union.</para>
+
+ <para>To request different parameters applications set the
+<structfield>type</structfield> field of a &v4l2-format; as above and
+initialize all fields of the &v4l2-pix-format;
+<structfield>vbi</structfield> member of the
+<structfield>fmt</structfield> union, or better just modify the
+results of <constant>VIDIOC_G_FMT</constant>, and call the
+&VIDIOC-S-FMT; ioctl with a pointer to this structure. Drivers may
+adjust the parameters and finally return the actual parameters as
+<constant>VIDIOC_G_FMT</constant> does.</para>
+
+ <para>Like <constant>VIDIOC_S_FMT</constant> the
+&VIDIOC-TRY-FMT; ioctl can be used to learn about hardware limitations
+without disabling I/O or possibly time consuming hardware
+preparations.</para>
+
+ <para>The contents of &v4l2-pix-format; and &v4l2-pix-format-mplane;
+are discussed in <xref linkend="pixfmt" />. See also the specification of the
+<constant>VIDIOC_G_FMT</constant>, <constant>VIDIOC_S_FMT</constant>
+and <constant>VIDIOC_TRY_FMT</constant> ioctls for details. Video
+output devices must implement both the
+<constant>VIDIOC_G_FMT</constant> and
+<constant>VIDIOC_S_FMT</constant> ioctl, even if
+<constant>VIDIOC_S_FMT</constant> ignores all requests and always
+returns default parameters as <constant>VIDIOC_G_FMT</constant> does.
+<constant>VIDIOC_TRY_FMT</constant> is optional.</para>
+ </section>
+
+ <section>
+ <title>Writing Images</title>
+
+ <para>A video output device may support the <link
+linkend="rw">write() function</link> and/or streaming (<link
+linkend="mmap">memory mapping</link> or <link
+linkend="userp">user pointer</link>) I/O. See <xref
+linkend="io" /> for details.</para>
+ </section>
diff --git a/Documentation/DocBook/media/v4l/dev-overlay.xml b/Documentation/DocBook/media/v4l/dev-overlay.xml
new file mode 100644
index 000000000..cc6e0c5c9
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/dev-overlay.xml
@@ -0,0 +1,368 @@
+ <title>Video Overlay Interface</title>
+ <subtitle>Also known as Framebuffer Overlay or Previewing</subtitle>
+
+ <para>Video overlay devices have the ability to genlock (TV-)video
+into the (VGA-)video signal of a graphics card, or to store captured
+images directly in video memory of a graphics card, typically with
+clipping. This can be considerable more efficient than capturing
+images and displaying them by other means. In the old days when only
+nuclear power plants needed cooling towers this used to be the only
+way to put live video into a window.</para>
+
+ <para>Video overlay devices are accessed through the same character
+special files as <link linkend="capture">video capture</link> devices.
+Note the default function of a <filename>/dev/video</filename> device
+is video capturing. The overlay function is only available after
+calling the &VIDIOC-S-FMT; ioctl.</para>
+
+ <para>The driver may support simultaneous overlay and capturing
+using the read/write and streaming I/O methods. If so, operation at
+the nominal frame rate of the video standard is not guaranteed. Frames
+may be directed away from overlay to capture, or one field may be used
+for overlay and the other for capture if the capture parameters permit
+this.</para>
+
+ <para>Applications should use different file descriptors for
+capturing and overlay. This must be supported by all drivers capable
+of simultaneous capturing and overlay. Optionally these drivers may
+also permit capturing and overlay with a single file descriptor for
+compatibility with V4L and earlier versions of V4L2.<footnote>
+ <para>A common application of two file descriptors is the
+XFree86 <link linkend="xvideo">Xv/V4L</link> interface driver and
+a V4L2 application. While the X server controls video overlay, the
+application can take advantage of memory mapping and DMA.</para>
+ <para>In the opinion of the designers of this API, no driver
+writer taking the efforts to support simultaneous capturing and
+overlay will restrict this ability by requiring a single file
+descriptor, as in V4L and earlier versions of V4L2. Making this
+optional means applications depending on two file descriptors need
+backup routines to be compatible with all drivers, which is
+considerable more work than using two fds in applications which do
+not. Also two fd's fit the general concept of one file descriptor for
+each logical stream. Hence as a complexity trade-off drivers
+<emphasis>must</emphasis> support two file descriptors and
+<emphasis>may</emphasis> support single fd operation.</para>
+ </footnote></para>
+
+ <section>
+ <title>Querying Capabilities</title>
+
+ <para>Devices supporting the video overlay interface set the
+<constant>V4L2_CAP_VIDEO_OVERLAY</constant> flag in the
+<structfield>capabilities</structfield> field of &v4l2-capability;
+returned by the &VIDIOC-QUERYCAP; ioctl. The overlay I/O method specified
+below must be supported. Tuners and audio inputs are optional.</para>
+ </section>
+
+ <section>
+ <title>Supplemental Functions</title>
+
+ <para>Video overlay devices shall support <link
+linkend="audio">audio input</link>, <link
+linkend="tuner">tuner</link>, <link linkend="control">controls</link>,
+<link linkend="crop">cropping and scaling</link> and <link
+linkend="streaming-par">streaming parameter</link> ioctls as needed.
+The <link linkend="video">video input</link> and <link
+linkend="standard">video standard</link> ioctls must be supported by
+all video overlay devices.</para>
+ </section>
+
+ <section>
+ <title>Setup</title>
+
+ <para>Before overlay can commence applications must program the
+driver with frame buffer parameters, namely the address and size of
+the frame buffer and the image format, for example RGB 5:6:5. The
+&VIDIOC-G-FBUF; and &VIDIOC-S-FBUF; ioctls are available to get
+and set these parameters, respectively. The
+<constant>VIDIOC_S_FBUF</constant> ioctl is privileged because it
+allows to set up DMA into physical memory, bypassing the memory
+protection mechanisms of the kernel. Only the superuser can change the
+frame buffer address and size. Users are not supposed to run TV
+applications as root or with SUID bit set. A small helper application
+with suitable privileges should query the graphics system and program
+the V4L2 driver at the appropriate time.</para>
+
+ <para>Some devices add the video overlay to the output signal
+of the graphics card. In this case the frame buffer is not modified by
+the video device, and the frame buffer address and pixel format are
+not needed by the driver. The <constant>VIDIOC_S_FBUF</constant> ioctl
+is not privileged. An application can check for this type of device by
+calling the <constant>VIDIOC_G_FBUF</constant> ioctl.</para>
+
+ <para>A driver may support any (or none) of five clipping/blending
+methods:<orderedlist>
+ <listitem>
+ <para>Chroma-keying displays the overlaid image only where
+pixels in the primary graphics surface assume a certain color.</para>
+ </listitem>
+ <listitem>
+ <para>A bitmap can be specified where each bit corresponds
+to a pixel in the overlaid image. When the bit is set, the
+corresponding video pixel is displayed, otherwise a pixel of the
+graphics surface.</para>
+ </listitem>
+ <listitem>
+ <para>A list of clipping rectangles can be specified. In
+these regions <emphasis>no</emphasis> video is displayed, so the
+graphics surface can be seen here.</para>
+ </listitem>
+ <listitem>
+ <para>The framebuffer has an alpha channel that can be used
+to clip or blend the framebuffer with the video.</para>
+ </listitem>
+ <listitem>
+ <para>A global alpha value can be specified to blend the
+framebuffer contents with video images.</para>
+ </listitem>
+ </orderedlist></para>
+
+ <para>When simultaneous capturing and overlay is supported and
+the hardware prohibits different image and frame buffer formats, the
+format requested first takes precedence. The attempt to capture
+(&VIDIOC-S-FMT;) or overlay (&VIDIOC-S-FBUF;) may fail with an
+&EBUSY; or return accordingly modified parameters..</para>
+ </section>
+
+ <section>
+ <title>Overlay Window</title>
+
+ <para>The overlaid image is determined by cropping and overlay
+window parameters. The former select an area of the video picture to
+capture, the latter how images are overlaid and clipped. Cropping
+initialization at minimum requires to reset the parameters to
+defaults. An example is given in <xref linkend="crop" />.</para>
+
+ <para>The overlay window is described by a &v4l2-window;. It
+defines the size of the image, its position over the graphics surface
+and the clipping to be applied. To get the current parameters
+applications set the <structfield>type</structfield> field of a
+&v4l2-format; to <constant>V4L2_BUF_TYPE_VIDEO_OVERLAY</constant> and
+call the &VIDIOC-G-FMT; ioctl. The driver fills the
+<structname>v4l2_window</structname> substructure named
+<structfield>win</structfield>. It is not possible to retrieve a
+previously programmed clipping list or bitmap.</para>
+
+ <para>To program the overlay window applications set the
+<structfield>type</structfield> field of a &v4l2-format; to
+<constant>V4L2_BUF_TYPE_VIDEO_OVERLAY</constant>, initialize the
+<structfield>win</structfield> substructure and call the
+&VIDIOC-S-FMT; ioctl. The driver adjusts the parameters against
+hardware limits and returns the actual parameters as
+<constant>VIDIOC_G_FMT</constant> does. Like
+<constant>VIDIOC_S_FMT</constant>, the &VIDIOC-TRY-FMT; ioctl can be
+used to learn about driver capabilities without actually changing
+driver state. Unlike <constant>VIDIOC_S_FMT</constant> this also works
+after the overlay has been enabled.</para>
+
+ <para>The scaling factor of the overlaid image is implied by the
+width and height given in &v4l2-window; and the size of the cropping
+rectangle. For more information see <xref linkend="crop" />.</para>
+
+ <para>When simultaneous capturing and overlay is supported and
+the hardware prohibits different image and window sizes, the size
+requested first takes precedence. The attempt to capture or overlay as
+well (&VIDIOC-S-FMT;) may fail with an &EBUSY; or return accordingly
+modified parameters.</para>
+
+ <table pgwide="1" frame="none" id="v4l2-window">
+ <title>struct <structname>v4l2_window</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>&v4l2-rect;</entry>
+ <entry><structfield>w</structfield></entry>
+ <entry>Size and position of the window relative to the
+top, left corner of the frame buffer defined with &VIDIOC-S-FBUF;. The
+window can extend the frame buffer width and height, the
+<structfield>x</structfield> and <structfield>y</structfield>
+coordinates can be negative, and it can lie completely outside the
+frame buffer. The driver clips the window accordingly, or if that is
+not possible, modifies its size and/or position.</entry>
+ </row>
+ <row>
+ <entry>&v4l2-field;</entry>
+ <entry><structfield>field</structfield></entry>
+ <entry>Applications set this field to determine which
+video field shall be overlaid, typically one of
+<constant>V4L2_FIELD_ANY</constant> (0),
+<constant>V4L2_FIELD_TOP</constant>,
+<constant>V4L2_FIELD_BOTTOM</constant> or
+<constant>V4L2_FIELD_INTERLACED</constant>. Drivers may have to choose
+a different field order and return the actual setting here.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>chromakey</structfield></entry>
+ <entry>When chroma-keying has been negotiated with
+&VIDIOC-S-FBUF; applications set this field to the desired pixel value
+for the chroma key. The format is the same as the pixel format of the
+framebuffer (&v4l2-framebuffer;
+<structfield>fmt.pixelformat</structfield> field), with bytes in host
+order. E.&nbsp;g. for <link
+linkend="V4L2-PIX-FMT-BGR32"><constant>V4L2_PIX_FMT_BGR24</constant></link>
+the value should be 0xRRGGBB on a little endian, 0xBBGGRR on a big
+endian host.</entry>
+ </row>
+ <row>
+ <entry>&v4l2-clip; *</entry>
+ <entry><structfield>clips</structfield></entry>
+ <entry>When chroma-keying has <emphasis>not</emphasis>
+been negotiated and &VIDIOC-G-FBUF; indicated this capability,
+applications can set this field to point to an array of
+clipping rectangles.</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry>Like the window coordinates
+<structfield>w</structfield>, clipping rectangles are defined relative
+to the top, left corner of the frame buffer. However clipping
+rectangles must not extend the frame buffer width and height, and they
+must not overlap. If possible applications should merge adjacent
+rectangles. Whether this must create x-y or y-x bands, or the order of
+rectangles, is not defined. When clip lists are not supported the
+driver ignores this field. Its contents after calling &VIDIOC-S-FMT;
+are undefined.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>clipcount</structfield></entry>
+ <entry>When the application set the
+<structfield>clips</structfield> field, this field must contain the
+number of clipping rectangles in the list. When clip lists are not
+supported the driver ignores this field, its contents after calling
+<constant>VIDIOC_S_FMT</constant> are undefined. When clip lists are
+supported but no clipping is desired this field must be set to
+zero.</entry>
+ </row>
+ <row>
+ <entry>void *</entry>
+ <entry><structfield>bitmap</structfield></entry>
+ <entry>When chroma-keying has
+<emphasis>not</emphasis> been negotiated and &VIDIOC-G-FBUF; indicated
+this capability, applications can set this field to point to a
+clipping bit mask.</entry>
+ </row>
+ <row>
+ <entry spanname="hspan"><para>It must be of the same size
+as the window, <structfield>w.width</structfield> and
+<structfield>w.height</structfield>. Each bit corresponds to a pixel
+in the overlaid image, which is displayed only when the bit is
+<emphasis>set</emphasis>. Pixel coordinates translate to bits like:
+<programlisting>
+((__u8 *) <structfield>bitmap</structfield>)[<structfield>w.width</structfield> * y + x / 8] &amp; (1 &lt;&lt; (x &amp; 7))</programlisting></para><para>where <structfield>0</structfield> &le; x &lt;
+<structfield>w.width</structfield> and <structfield>0</structfield> &le;
+y &lt;<structfield>w.height</structfield>.<footnote>
+ <para>Should we require
+ <structfield>w.width</structfield> to be a multiple of
+ eight?</para>
+ </footnote></para><para>When a clipping
+bit mask is not supported the driver ignores this field, its contents
+after calling &VIDIOC-S-FMT; are undefined. When a bit mask is supported
+but no clipping is desired this field must be set to
+<constant>NULL</constant>.</para><para>Applications need not create a
+clip list or bit mask. When they pass both, or despite negotiating
+chroma-keying, the results are undefined. Regardless of the chosen
+method, the clipping abilities of the hardware may be limited in
+quantity or quality. The results when these limits are exceeded are
+undefined.<footnote>
+ <para>When the image is written into frame buffer
+memory it will be undesirable if the driver clips out less pixels
+than expected, because the application and graphics system are not
+aware these regions need to be refreshed. The driver should clip out
+more pixels or not write the image at all.</para>
+ </footnote></para></entry>
+ </row>
+ <row>
+ <entry>__u8</entry>
+ <entry><structfield>global_alpha</structfield></entry>
+ <entry>The global alpha value used to blend the
+framebuffer with video images, if global alpha blending has been
+negotiated (<constant>V4L2_FBUF_FLAG_GLOBAL_ALPHA</constant>, see
+&VIDIOC-S-FBUF;, <xref linkend="framebuffer-flags" />).</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry>Note this field was added in Linux 2.6.23, extending the structure. However
+the <link linkend="vidioc-g-fmt">VIDIOC_G/S/TRY_FMT</link> ioctls,
+which take a pointer to a <link
+linkend="v4l2-format">v4l2_format</link> parent structure with padding
+bytes at the end, are not affected.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="v4l2-clip">
+ <title>struct <structname>v4l2_clip</structname><footnote>
+ <para>The X Window system defines "regions" which are
+vectors of struct BoxRec { short x1, y1, x2, y2; } with width = x2 -
+x1 and height = y2 - y1, so one cannot pass X11 clip lists
+directly.</para>
+ </footnote></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>&v4l2-rect;</entry>
+ <entry><structfield>c</structfield></entry>
+ <entry>Coordinates of the clipping rectangle, relative to
+the top, left corner of the frame buffer. Only window pixels
+<emphasis>outside</emphasis> all clipping rectangles are
+displayed.</entry>
+ </row>
+ <row>
+ <entry>&v4l2-clip; *</entry>
+ <entry><structfield>next</structfield></entry>
+ <entry>Pointer to the next clipping rectangle, NULL when
+this is the last rectangle. Drivers ignore this field, it cannot be
+used to pass a linked list of clipping rectangles.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <!-- NB for easier reading this table is duplicated
+ in the vidioc-cropcap chapter.-->
+
+ <table pgwide="1" frame="none" id="v4l2-rect">
+ <title>struct <structname>v4l2_rect</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__s32</entry>
+ <entry><structfield>left</structfield></entry>
+ <entry>Horizontal offset of the top, left corner of the
+rectangle, in pixels.</entry>
+ </row>
+ <row>
+ <entry>__s32</entry>
+ <entry><structfield>top</structfield></entry>
+ <entry>Vertical offset of the top, left corner of the
+rectangle, in pixels. Offsets increase to the right and down.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>width</structfield></entry>
+ <entry>Width of the rectangle, in pixels.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>height</structfield></entry>
+ <entry>Height of the rectangle, in pixels.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </section>
+
+ <section>
+ <title>Enabling Overlay</title>
+
+ <para>To start or stop the frame buffer overlay applications call
+the &VIDIOC-OVERLAY; ioctl.</para>
+ </section>
diff --git a/Documentation/DocBook/media/v4l/dev-radio.xml b/Documentation/DocBook/media/v4l/dev-radio.xml
new file mode 100644
index 000000000..3e6ac73b3
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/dev-radio.xml
@@ -0,0 +1,49 @@
+ <title>Radio Interface</title>
+
+ <para>This interface is intended for AM and FM (analog) radio
+receivers and transmitters.</para>
+
+ <para>Conventionally V4L2 radio devices are accessed through
+character device special files named <filename>/dev/radio</filename>
+and <filename>/dev/radio0</filename> to
+<filename>/dev/radio63</filename> with major number 81 and minor
+numbers 64 to 127.</para>
+
+ <section>
+ <title>Querying Capabilities</title>
+
+ <para>Devices supporting the radio interface set the
+<constant>V4L2_CAP_RADIO</constant> and
+<constant>V4L2_CAP_TUNER</constant> or
+<constant>V4L2_CAP_MODULATOR</constant> flag in the
+<structfield>capabilities</structfield> field of &v4l2-capability;
+returned by the &VIDIOC-QUERYCAP; ioctl. Other combinations of
+capability flags are reserved for future extensions.</para>
+ </section>
+
+ <section>
+ <title>Supplemental Functions</title>
+
+ <para>Radio devices can support <link
+linkend="control">controls</link>, and must support the <link
+linkend="tuner">tuner or modulator</link> ioctls.</para>
+
+ <para>They do not support the video input or output, audio input
+or output, video standard, cropping and scaling, compression and
+streaming parameter, or overlay ioctls. All other ioctls and I/O
+methods are reserved for future extensions.</para>
+ </section>
+
+ <section>
+ <title>Programming</title>
+
+ <para>Radio devices may have a couple audio controls (as discussed
+in <xref linkend="control" />) such as a volume control, possibly custom
+controls. Further all radio devices have one tuner or modulator (these are
+discussed in <xref linkend="tuner" />) with index number zero to select
+the radio frequency and to determine if a monaural or FM stereo
+program is received/emitted. Drivers switch automatically between AM and FM
+depending on the selected frequency. The &VIDIOC-G-TUNER; or
+&VIDIOC-G-MODULATOR; ioctl
+reports the supported frequency range.</para>
+ </section>
diff --git a/Documentation/DocBook/media/v4l/dev-raw-vbi.xml b/Documentation/DocBook/media/v4l/dev-raw-vbi.xml
new file mode 100644
index 000000000..f4b61b6ce
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/dev-raw-vbi.xml
@@ -0,0 +1,345 @@
+ <title>Raw VBI Data Interface</title>
+
+ <para>VBI is an abbreviation of Vertical Blanking Interval, a gap
+in the sequence of lines of an analog video signal. During VBI
+no picture information is transmitted, allowing some time while the
+electron beam of a cathode ray tube TV returns to the top of the
+screen. Using an oscilloscope you will find here the vertical
+synchronization pulses and short data packages ASK
+modulated<footnote><para>ASK: Amplitude-Shift Keying. A high signal
+level represents a '1' bit, a low level a '0' bit.</para></footnote>
+onto the video signal. These are transmissions of services such as
+Teletext or Closed Caption.</para>
+
+ <para>Subject of this interface type is raw VBI data, as sampled off
+a video signal, or to be added to a signal for output.
+The data format is similar to uncompressed video images, a number of
+lines times a number of samples per line, we call this a VBI image.</para>
+
+ <para>Conventionally V4L2 VBI devices are accessed through character
+device special files named <filename>/dev/vbi</filename> and
+<filename>/dev/vbi0</filename> to <filename>/dev/vbi31</filename> with
+major number 81 and minor numbers 224 to 255.
+<filename>/dev/vbi</filename> is typically a symbolic link to the
+preferred VBI device. This convention applies to both input and output
+devices.</para>
+
+ <para>To address the problems of finding related video and VBI
+devices VBI capturing and output is also available as device function
+under <filename>/dev/video</filename>. To capture or output raw VBI
+data with these devices applications must call the &VIDIOC-S-FMT;
+ioctl. Accessed as <filename>/dev/vbi</filename>, raw VBI capturing
+or output is the default device function.</para>
+
+ <section>
+ <title>Querying Capabilities</title>
+
+ <para>Devices supporting the raw VBI capturing or output API set
+the <constant>V4L2_CAP_VBI_CAPTURE</constant> or
+<constant>V4L2_CAP_VBI_OUTPUT</constant> flags, respectively, in the
+<structfield>capabilities</structfield> field of &v4l2-capability;
+returned by the &VIDIOC-QUERYCAP; ioctl. At least one of the
+read/write, streaming or asynchronous I/O methods must be
+supported. VBI devices may or may not have a tuner or modulator.</para>
+ </section>
+
+ <section>
+ <title>Supplemental Functions</title>
+
+ <para>VBI devices shall support <link linkend="video">video
+input or output</link>, <link linkend="tuner">tuner or
+modulator</link>, and <link linkend="control">controls</link> ioctls
+as needed. The <link linkend="standard">video standard</link> ioctls provide
+information vital to program a VBI device, therefore must be
+supported.</para>
+ </section>
+
+ <section>
+ <title>Raw VBI Format Negotiation</title>
+
+ <para>Raw VBI sampling abilities can vary, in particular the
+sampling frequency. To properly interpret the data V4L2 specifies an
+ioctl to query the sampling parameters. Moreover, to allow for some
+flexibility applications can also suggest different parameters.</para>
+
+ <para>As usual these parameters are <emphasis>not</emphasis>
+reset at &func-open; time to permit Unix tool chains, programming a
+device and then reading from it as if it was a plain file. Well
+written V4L2 applications should always ensure they really get what
+they want, requesting reasonable parameters and then checking if the
+actual parameters are suitable.</para>
+
+ <para>To query the current raw VBI capture parameters
+applications set the <structfield>type</structfield> field of a
+&v4l2-format; to <constant>V4L2_BUF_TYPE_VBI_CAPTURE</constant> or
+<constant>V4L2_BUF_TYPE_VBI_OUTPUT</constant>, and call the
+&VIDIOC-G-FMT; ioctl with a pointer to this structure. Drivers fill
+the &v4l2-vbi-format; <structfield>vbi</structfield> member of the
+<structfield>fmt</structfield> union.</para>
+
+ <para>To request different parameters applications set the
+<structfield>type</structfield> field of a &v4l2-format; as above and
+initialize all fields of the &v4l2-vbi-format;
+<structfield>vbi</structfield> member of the
+<structfield>fmt</structfield> union, or better just modify the
+results of <constant>VIDIOC_G_FMT</constant>, and call the
+&VIDIOC-S-FMT; ioctl with a pointer to this structure. Drivers return
+an &EINVAL; only when the given parameters are ambiguous, otherwise
+they modify the parameters according to the hardware capabilites and
+return the actual parameters. When the driver allocates resources at
+this point, it may return an &EBUSY; to indicate the returned
+parameters are valid but the required resources are currently not
+available. That may happen for instance when the video and VBI areas
+to capture would overlap, or when the driver supports multiple opens
+and another process already requested VBI capturing or output. Anyway,
+applications must expect other resource allocation points which may
+return <errorcode>EBUSY</errorcode>, at the &VIDIOC-STREAMON; ioctl
+and the first read(), write() and select() call.</para>
+
+ <para>VBI devices must implement both the
+<constant>VIDIOC_G_FMT</constant> and
+<constant>VIDIOC_S_FMT</constant> ioctl, even if
+<constant>VIDIOC_S_FMT</constant> ignores all requests and always
+returns default parameters as <constant>VIDIOC_G_FMT</constant> does.
+<constant>VIDIOC_TRY_FMT</constant> is optional.</para>
+
+ <table pgwide="1" frame="none" id="v4l2-vbi-format">
+ <title>struct <structname>v4l2_vbi_format</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>sampling_rate</structfield></entry>
+ <entry>Samples per second, i.&nbsp;e. unit 1 Hz.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>offset</structfield></entry>
+ <entry><para>Horizontal offset of the VBI image,
+relative to the leading edge of the line synchronization pulse and
+counted in samples: The first sample in the VBI image will be located
+<structfield>offset</structfield> /
+<structfield>sampling_rate</structfield> seconds following the leading
+edge. See also <xref linkend="vbi-hsync" />.</para></entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>samples_per_line</structfield></entry>
+ <entry></entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>sample_format</structfield></entry>
+ <entry><para>Defines the sample format as in <xref
+linkend="pixfmt" />, a four-character-code.<footnote>
+ <para>A few devices may be unable to
+sample VBI data at all but can extend the video capture window to the
+VBI region.</para>
+ </footnote> Usually this is
+<constant>V4L2_PIX_FMT_GREY</constant>, i.&nbsp;e. each sample
+consists of 8 bits with lower values oriented towards the black level.
+Do not assume any other correlation of values with the signal level.
+For example, the MSB does not necessarily indicate if the signal is
+'high' or 'low' because 128 may not be the mean value of the
+signal. Drivers shall not convert the sample format by software.</para></entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>start</structfield>[2]</entry>
+ <entry>This is the scanning system line number
+associated with the first line of the VBI image, of the first and the
+second field respectively. See <xref linkend="vbi-525" /> and
+<xref linkend="vbi-625" /> for valid values.
+The <constant>V4L2_VBI_ITU_525_F1_START</constant>,
+<constant>V4L2_VBI_ITU_525_F2_START</constant>,
+<constant>V4L2_VBI_ITU_625_F1_START</constant> and
+<constant>V4L2_VBI_ITU_625_F2_START</constant> defines give the start line
+numbers for each field for each 525 or 625 line format as a convenience.
+Don't forget that ITU line numbering starts at 1, not 0.
+VBI input drivers can return start values 0 if the hardware cannot
+reliable identify scanning lines, VBI acquisition may not require this
+information.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>count</structfield>[2]</entry>
+ <entry>The number of lines in the first and second
+field image, respectively.</entry>
+ </row>
+ <row>
+ <entry spanname="hspan"><para>Drivers should be as
+flexibility as possible. For example, it may be possible to extend or
+move the VBI capture window down to the picture area, implementing a
+'full field mode' to capture data service transmissions embedded in
+the picture.</para><para>An application can set the first or second
+<structfield>count</structfield> value to zero if no data is required
+from the respective field; <structfield>count</structfield>[1] if the
+scanning system is progressive, &ie; not interlaced. The
+corresponding start value shall be ignored by the application and
+driver. Anyway, drivers may not support single field capturing and
+return both count values non-zero.</para><para>Both
+<structfield>count</structfield> values set to zero, or line numbers
+outside the bounds depicted in <xref linkend="vbi-525" /> and <xref
+ linkend="vbi-625" />, or a field image covering
+lines of two fields, are invalid and shall not be returned by the
+driver.</para><para>To initialize the <structfield>start</structfield>
+and <structfield>count</structfield> fields, applications must first
+determine the current video standard selection. The &v4l2-std-id; or
+the <structfield>framelines</structfield> field of &v4l2-standard; can
+be evaluated for this purpose.</para></entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>flags</structfield></entry>
+ <entry>See <xref linkend="vbifmt-flags" /> below. Currently
+only drivers set flags, applications must set this field to
+zero.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved</structfield>[2]</entry>
+ <entry>This array is reserved for future extensions.
+Drivers and applications must set it to zero.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="vbifmt-flags">
+ <title>Raw VBI Format Flags</title>
+ <tgroup cols="3">
+ &cs-def;
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_VBI_UNSYNC</constant></entry>
+ <entry>0x0001</entry>
+ <entry><para>This flag indicates hardware which does not
+properly distinguish between fields. Normally the VBI image stores the
+first field (lower scanning line numbers) first in memory. This may be
+a top or bottom field depending on the video standard. When this flag
+is set the first or second field may be stored first, however the
+fields are still in correct temporal order with the older field first
+in memory.<footnote>
+ <para>Most VBI services transmit on both fields, but
+some have different semantics depending on the field number. These
+cannot be reliable decoded or encoded when
+<constant>V4L2_VBI_UNSYNC</constant> is set.</para>
+ </footnote></para></entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_VBI_INTERLACED</constant></entry>
+ <entry>0x0002</entry>
+ <entry>By default the two field images will be passed
+sequentially; all lines of the first field followed by all lines of
+the second field (compare <xref linkend="field-order" />
+<constant>V4L2_FIELD_SEQ_TB</constant> and
+<constant>V4L2_FIELD_SEQ_BT</constant>, whether the top or bottom
+field is first in memory depends on the video standard). When this
+flag is set, the two fields are interlaced (cf.
+<constant>V4L2_FIELD_INTERLACED</constant>). The first line of the
+first field followed by the first line of the second field, then the
+two second lines, and so on. Such a layout may be necessary when the
+hardware has been programmed to capture or output interlaced video
+images and is unable to separate the fields for VBI capturing at
+the same time. For simplicity setting this flag implies that both
+<structfield>count</structfield> values are equal and non-zero.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <figure id="vbi-hsync">
+ <title>Line synchronization</title>
+ <mediaobject>
+ <imageobject>
+ <imagedata fileref="vbi_hsync.pdf" format="PS" />
+ </imageobject>
+ <imageobject>
+ <imagedata fileref="vbi_hsync.gif" format="GIF" />
+ </imageobject>
+ <textobject>
+ <phrase>Line synchronization diagram</phrase>
+ </textobject>
+ </mediaobject>
+ </figure>
+
+ <figure id="vbi-525">
+ <title>ITU-R 525 line numbering (M/NTSC and M/PAL)</title>
+ <mediaobject>
+ <imageobject>
+ <imagedata fileref="vbi_525.pdf" format="PS" />
+ </imageobject>
+ <imageobject>
+ <imagedata fileref="vbi_525.gif" format="GIF" />
+ </imageobject>
+ <textobject>
+ <phrase>NTSC field synchronization diagram</phrase>
+ </textobject>
+ <caption>
+ <para>(1) For the purpose of this specification field 2
+starts in line 264 and not 263.5 because half line capturing is not
+supported.</para>
+ </caption>
+ </mediaobject>
+ </figure>
+
+ <figure id="vbi-625">
+ <title>ITU-R 625 line numbering</title>
+ <mediaobject>
+ <imageobject>
+ <imagedata fileref="vbi_625.pdf" format="PS" />
+ </imageobject>
+ <imageobject>
+ <imagedata fileref="vbi_625.gif" format="GIF" />
+ </imageobject>
+ <textobject>
+ <phrase>PAL/SECAM field synchronization diagram</phrase>
+ </textobject>
+ <caption>
+ <para>(1) For the purpose of this specification field 2
+starts in line 314 and not 313.5 because half line capturing is not
+supported.</para>
+ </caption>
+ </mediaobject>
+ </figure>
+
+ <para>Remember the VBI image format depends on the selected
+video standard, therefore the application must choose a new standard or
+query the current standard first. Attempts to read or write data ahead
+of format negotiation, or after switching the video standard which may
+invalidate the negotiated VBI parameters, should be refused by the
+driver. A format change during active I/O is not permitted.</para>
+ </section>
+
+ <section>
+ <title>Reading and writing VBI images</title>
+
+ <para>To assure synchronization with the field number and easier
+implementation, the smallest unit of data passed at a time is one
+frame, consisting of two fields of VBI images immediately following in
+memory.</para>
+
+ <para>The total size of a frame computes as follows:</para>
+
+ <programlisting>
+(<structfield>count</structfield>[0] + <structfield>count</structfield>[1]) *
+<structfield>samples_per_line</structfield> * sample size in bytes</programlisting>
+
+ <para>The sample size is most likely always one byte,
+applications must check the <structfield>sample_format</structfield>
+field though, to function properly with other drivers.</para>
+
+ <para>A VBI device may support <link
+ linkend="rw">read/write</link> and/or streaming (<link
+ linkend="mmap">memory mapping</link> or <link
+ linkend="userp">user pointer</link>) I/O. The latter bears the
+possibility of synchronizing video and
+VBI data by using buffer timestamps.</para>
+
+ <para>Remember the &VIDIOC-STREAMON; ioctl and the first read(),
+write() and select() call can be resource allocation points returning
+an &EBUSY; if the required hardware resources are temporarily
+unavailable, for example the device is already in use by another
+process.</para>
+ </section>
diff --git a/Documentation/DocBook/media/v4l/dev-rds.xml b/Documentation/DocBook/media/v4l/dev-rds.xml
new file mode 100644
index 000000000..be2f33737
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/dev-rds.xml
@@ -0,0 +1,196 @@
+ <title>RDS Interface</title>
+
+ <para>The Radio Data System transmits supplementary
+information in binary format, for example the station name or travel
+information, on an inaudible audio subcarrier of a radio program. This
+interface is aimed at devices capable of receiving and/or transmitting RDS
+information.</para>
+
+ <para>For more information see the core RDS standard <xref linkend="iec62106" />
+and the RBDS standard <xref linkend="nrsc4" />.</para>
+
+ <para>Note that the RBDS standard as is used in the USA is almost identical
+to the RDS standard. Any RDS decoder/encoder can also handle RBDS. Only some of the
+fields have slightly different meanings. See the RBDS standard for more
+information.</para>
+
+ <para>The RBDS standard also specifies support for MMBS (Modified Mobile Search).
+This is a proprietary format which seems to be discontinued. The RDS interface does not
+support this format. Should support for MMBS (or the so-called 'E blocks' in general)
+be needed, then please contact the linux-media mailing list: &v4l-ml;.</para>
+
+ <section>
+ <title>Querying Capabilities</title>
+
+ <para>Devices supporting the RDS capturing API set
+the <constant>V4L2_CAP_RDS_CAPTURE</constant> flag in
+the <structfield>capabilities</structfield> field of &v4l2-capability;
+returned by the &VIDIOC-QUERYCAP; ioctl. Any tuner that supports RDS
+will set the <constant>V4L2_TUNER_CAP_RDS</constant> flag in
+the <structfield>capability</structfield> field of &v4l2-tuner;. If
+the driver only passes RDS blocks without interpreting the data
+the <constant>V4L2_TUNER_CAP_RDS_BLOCK_IO</constant> flag has to be
+set, see <link linkend="reading-rds-data">Reading RDS data</link>.
+For future use the
+flag <constant>V4L2_TUNER_CAP_RDS_CONTROLS</constant> has also been
+defined. However, a driver for a radio tuner with this capability does
+not yet exist, so if you are planning to write such a driver you
+should discuss this on the linux-media mailing list: &v4l-ml;.</para>
+
+ <para> Whether an RDS signal is present can be detected by looking
+at the <structfield>rxsubchans</structfield> field of &v4l2-tuner;:
+the <constant>V4L2_TUNER_SUB_RDS</constant> will be set if RDS data
+was detected.</para>
+
+ <para>Devices supporting the RDS output API
+set the <constant>V4L2_CAP_RDS_OUTPUT</constant> flag in
+the <structfield>capabilities</structfield> field of &v4l2-capability;
+returned by the &VIDIOC-QUERYCAP; ioctl.
+Any modulator that supports RDS will set the
+<constant>V4L2_TUNER_CAP_RDS</constant> flag in the <structfield>capability</structfield>
+field of &v4l2-modulator;.
+In order to enable the RDS transmission one must set the <constant>V4L2_TUNER_SUB_RDS</constant>
+bit in the <structfield>txsubchans</structfield> field of &v4l2-modulator;.
+If the driver only passes RDS blocks without interpreting the data
+the <constant>V4L2_TUNER_CAP_RDS_BLOCK_IO</constant> flag has to be set. If the
+tuner is capable of handling RDS entities like program identification codes and radio
+text, the flag <constant>V4L2_TUNER_CAP_RDS_CONTROLS</constant> should be set,
+see <link linkend="writing-rds-data">Writing RDS data</link> and
+<link linkend="fm-tx-controls">FM Transmitter Control Reference</link>.</para>
+ </section>
+
+ <section id="reading-rds-data">
+ <title>Reading RDS data</title>
+
+ <para>RDS data can be read from the radio device
+with the &func-read; function. The data is packed in groups of three bytes.</para>
+ </section>
+
+ <section id="writing-rds-data">
+ <title>Writing RDS data</title>
+
+ <para>RDS data can be written to the radio device
+with the &func-write; function. The data is packed in groups of three bytes,
+as follows:</para>
+ </section>
+
+ <section>
+ <title>RDS datastructures</title>
+ <table frame="none" pgwide="1" id="v4l2-rds-data">
+ <title>struct
+<structname>v4l2_rds_data</structname></title>
+ <tgroup cols="3">
+ <colspec colname="c1" colwidth="1*" />
+ <colspec colname="c2" colwidth="1*" />
+ <colspec colname="c3" colwidth="5*" />
+ <tbody valign="top">
+ <row>
+ <entry>__u8</entry>
+ <entry><structfield>lsb</structfield></entry>
+ <entry>Least Significant Byte of RDS Block</entry>
+ </row>
+ <row>
+ <entry>__u8</entry>
+ <entry><structfield>msb</structfield></entry>
+ <entry>Most Significant Byte of RDS Block</entry>
+ </row>
+ <row>
+ <entry>__u8</entry>
+ <entry><structfield>block</structfield></entry>
+ <entry>Block description</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ <table frame="none" pgwide="1" id="v4l2-rds-block">
+ <title>Block description</title>
+ <tgroup cols="2">
+ <colspec colname="c1" colwidth="1*" />
+ <colspec colname="c2" colwidth="5*" />
+ <tbody valign="top">
+ <row>
+ <entry>Bits 0-2</entry>
+ <entry>Block (aka offset) of the received data.</entry>
+ </row>
+ <row>
+ <entry>Bits 3-5</entry>
+ <entry>Deprecated. Currently identical to bits 0-2. Do not use these bits.</entry>
+ </row>
+ <row>
+ <entry>Bit 6</entry>
+ <entry>Corrected bit. Indicates that an error was corrected for this data block.</entry>
+ </row>
+ <row>
+ <entry>Bit 7</entry>
+ <entry>Error bit. Indicates that an uncorrectable error occurred during reception of this block.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table frame="none" pgwide="1" id="v4l2-rds-block-codes">
+ <title>Block defines</title>
+ <tgroup cols="4">
+ <colspec colname="c1" colwidth="1*" />
+ <colspec colname="c2" colwidth="1*" />
+ <colspec colname="c3" colwidth="1*" />
+ <colspec colname="c4" colwidth="5*" />
+ <tbody valign="top">
+ <row>
+ <entry>V4L2_RDS_BLOCK_MSK</entry>
+ <entry> </entry>
+ <entry>7</entry>
+ <entry>Mask for bits 0-2 to get the block ID.</entry>
+ </row>
+ <row>
+ <entry>V4L2_RDS_BLOCK_A</entry>
+ <entry> </entry>
+ <entry>0</entry>
+ <entry>Block A.</entry>
+ </row>
+ <row>
+ <entry>V4L2_RDS_BLOCK_B</entry>
+ <entry> </entry>
+ <entry>1</entry>
+ <entry>Block B.</entry>
+ </row>
+ <row>
+ <entry>V4L2_RDS_BLOCK_C</entry>
+ <entry> </entry>
+ <entry>2</entry>
+ <entry>Block C.</entry>
+ </row>
+ <row>
+ <entry>V4L2_RDS_BLOCK_D</entry>
+ <entry> </entry>
+ <entry>3</entry>
+ <entry>Block D.</entry>
+ </row>
+ <row>
+ <entry>V4L2_RDS_BLOCK_C_ALT</entry>
+ <entry> </entry>
+ <entry>4</entry>
+ <entry>Block C'.</entry>
+ </row>
+ <row>
+ <entry>V4L2_RDS_BLOCK_INVALID</entry>
+ <entry>read-only</entry>
+ <entry>7</entry>
+ <entry>An invalid block.</entry>
+ </row>
+ <row>
+ <entry>V4L2_RDS_BLOCK_CORRECTED</entry>
+ <entry>read-only</entry>
+ <entry>0x40</entry>
+ <entry>A bit error was detected but corrected.</entry>
+ </row>
+ <row>
+ <entry>V4L2_RDS_BLOCK_ERROR</entry>
+ <entry>read-only</entry>
+ <entry>0x80</entry>
+ <entry>An uncorrectable error occurred.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </section>
diff --git a/Documentation/DocBook/media/v4l/dev-sdr.xml b/Documentation/DocBook/media/v4l/dev-sdr.xml
new file mode 100644
index 000000000..f8903568a
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/dev-sdr.xml
@@ -0,0 +1,120 @@
+ <title>Software Defined Radio Interface (SDR)</title>
+
+ <note>
+ <title>Experimental</title>
+ <para>This is an <link linkend="experimental"> experimental </link>
+ interface and may change in the future.</para>
+ </note>
+
+ <para>
+SDR is an abbreviation of Software Defined Radio, the radio device
+which uses application software for modulation or demodulation. This interface
+is intended for controlling and data streaming of such devices.
+ </para>
+
+ <para>
+SDR devices are accessed through character device special files named
+<filename>/dev/swradio0</filename> to <filename>/dev/swradio255</filename>
+with major number 81 and dynamically allocated minor numbers 0 to 255.
+ </para>
+
+ <section>
+ <title>Querying Capabilities</title>
+
+ <para>
+Devices supporting the SDR receiver interface set the
+<constant>V4L2_CAP_SDR_CAPTURE</constant> and
+<constant>V4L2_CAP_TUNER</constant> flag in the
+<structfield>capabilities</structfield> field of &v4l2-capability;
+returned by the &VIDIOC-QUERYCAP; ioctl. That flag means the device has an
+Analog to Digital Converter (ADC), which is a mandatory element for the SDR receiver.
+At least one of the read/write, streaming or asynchronous I/O methods must
+be supported.
+ </para>
+ </section>
+
+ <section>
+ <title>Supplemental Functions</title>
+
+ <para>
+SDR devices can support <link linkend="control">controls</link>, and must
+support the <link linkend="tuner">tuner</link> ioctls. Tuner ioctls are used
+for setting the ADC sampling rate (sampling frequency) and the possible RF tuner
+frequency.
+ </para>
+
+ <para>
+The <constant>V4L2_TUNER_ADC</constant> tuner type is used for ADC tuners, and
+the <constant>V4L2_TUNER_RF</constant> tuner type is used for RF tuners. The
+tuner index of the RF tuner (if any) must always follow the ADC tuner index.
+Normally the ADC tuner is #0 and the RF tuner is #1.
+ </para>
+
+ <para>
+The &VIDIOC-S-HW-FREQ-SEEK; ioctl is not supported.
+ </para>
+ </section>
+
+ <section>
+ <title>Data Format Negotiation</title>
+
+ <para>
+The SDR capture device uses the <link linkend="format">format</link> ioctls to
+select the capture format. Both the sampling resolution and the data streaming
+format are bound to that selectable format. In addition to the basic
+<link linkend="format">format</link> ioctls, the &VIDIOC-ENUM-FMT; ioctl
+must be supported as well.
+ </para>
+
+ <para>
+To use the <link linkend="format">format</link> ioctls applications set the
+<structfield>type</structfield> field of a &v4l2-format; to
+<constant>V4L2_BUF_TYPE_SDR_CAPTURE</constant> and use the &v4l2-sdr-format;
+<structfield>sdr</structfield> member of the <structfield>fmt</structfield>
+union as needed per the desired operation.
+Currently there is two fields, <structfield>pixelformat</structfield> and
+<structfield>buffersize</structfield>, of struct &v4l2-sdr-format; which are
+used. Content of the <structfield>pixelformat</structfield> is V4L2 FourCC
+code of the data format. The <structfield>buffersize</structfield> field is
+maximum buffer size in bytes required for data transfer, set by the driver in
+order to inform application.
+ </para>
+
+ <table pgwide="1" frame="none" id="v4l2-sdr-format">
+ <title>struct <structname>v4l2_sdr_format</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>pixelformat</structfield></entry>
+ <entry>
+The data format or type of compression, set by the application. This is a
+little endian <link linkend="v4l2-fourcc">four character code</link>.
+V4L2 defines SDR formats in <xref linkend="sdr-formats" />.
+ </entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>buffersize</structfield></entry>
+ <entry>
+Maximum size in bytes required for data. Value is set by the driver.
+ </entry>
+ </row>
+ <row>
+ <entry>__u8</entry>
+ <entry><structfield>reserved[24]</structfield></entry>
+ <entry>This array is reserved for future extensions.
+Drivers and applications must set it to zero.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <para>
+An SDR device may support <link linkend="rw">read/write</link>
+and/or streaming (<link linkend="mmap">memory mapping</link>
+or <link linkend="userp">user pointer</link>) I/O.
+ </para>
+
+ </section>
diff --git a/Documentation/DocBook/media/v4l/dev-sliced-vbi.xml b/Documentation/DocBook/media/v4l/dev-sliced-vbi.xml
new file mode 100644
index 000000000..0aec62ed2
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/dev-sliced-vbi.xml
@@ -0,0 +1,706 @@
+ <title>Sliced VBI Data Interface</title>
+
+ <para>VBI stands for Vertical Blanking Interval, a gap in the
+sequence of lines of an analog video signal. During VBI no picture
+information is transmitted, allowing some time while the electron beam
+of a cathode ray tube TV returns to the top of the screen.</para>
+
+ <para>Sliced VBI devices use hardware to demodulate data transmitted
+in the VBI. V4L2 drivers shall <emphasis>not</emphasis> do this by
+software, see also the <link linkend="raw-vbi">raw VBI
+interface</link>. The data is passed as short packets of fixed size,
+covering one scan line each. The number of packets per video frame is
+variable.</para>
+
+ <para>Sliced VBI capture and output devices are accessed through the
+same character special files as raw VBI devices. When a driver
+supports both interfaces, the default function of a
+<filename>/dev/vbi</filename> device is <emphasis>raw</emphasis> VBI
+capturing or output, and the sliced VBI function is only available
+after calling the &VIDIOC-S-FMT; ioctl as defined below. Likewise a
+<filename>/dev/video</filename> device may support the sliced VBI API,
+however the default function here is video capturing or output.
+Different file descriptors must be used to pass raw and sliced VBI
+data simultaneously, if this is supported by the driver.</para>
+
+ <section>
+ <title>Querying Capabilities</title>
+
+ <para>Devices supporting the sliced VBI capturing or output API
+set the <constant>V4L2_CAP_SLICED_VBI_CAPTURE</constant> or
+<constant>V4L2_CAP_SLICED_VBI_OUTPUT</constant> flag respectively, in
+the <structfield>capabilities</structfield> field of &v4l2-capability;
+returned by the &VIDIOC-QUERYCAP; ioctl. At least one of the
+read/write, streaming or asynchronous <link linkend="io">I/O
+methods</link> must be supported. Sliced VBI devices may have a tuner
+or modulator.</para>
+ </section>
+
+ <section>
+ <title>Supplemental Functions</title>
+
+ <para>Sliced VBI devices shall support <link linkend="video">video
+input or output</link> and <link linkend="tuner">tuner or
+modulator</link> ioctls if they have these capabilities, and they may
+support <link linkend="control">control</link> ioctls. The <link
+linkend="standard">video standard</link> ioctls provide information
+vital to program a sliced VBI device, therefore must be
+supported.</para>
+ </section>
+
+ <section id="sliced-vbi-format-negotitation">
+ <title>Sliced VBI Format Negotiation</title>
+
+ <para>To find out which data services are supported by the
+hardware applications can call the &VIDIOC-G-SLICED-VBI-CAP; ioctl.
+All drivers implementing the sliced VBI interface must support this
+ioctl. The results may differ from those of the &VIDIOC-S-FMT; ioctl
+when the number of VBI lines the hardware can capture or output per
+frame, or the number of services it can identify on a given line are
+limited. For example on PAL line 16 the hardware may be able to look
+for a VPS or Teletext signal, but not both at the same time.</para>
+
+ <para>To determine the currently selected services applications
+set the <structfield>type </structfield> field of &v4l2-format; to
+<constant> V4L2_BUF_TYPE_SLICED_VBI_CAPTURE</constant> or <constant>
+V4L2_BUF_TYPE_SLICED_VBI_OUTPUT</constant>, and the &VIDIOC-G-FMT;
+ioctl fills the <structfield>fmt.sliced</structfield> member, a
+&v4l2-sliced-vbi-format;.</para>
+
+ <para>Applications can request different parameters by
+initializing or modifying the <structfield>fmt.sliced</structfield>
+member and calling the &VIDIOC-S-FMT; ioctl with a pointer to the
+<structname>v4l2_format</structname> structure.</para>
+
+ <para>The sliced VBI API is more complicated than the raw VBI API
+because the hardware must be told which VBI service to expect on each
+scan line. Not all services may be supported by the hardware on all
+lines (this is especially true for VBI output where Teletext is often
+unsupported and other services can only be inserted in one specific
+line). In many cases, however, it is sufficient to just set the
+<structfield>service_set</structfield> field to the required services
+and let the driver fill the <structfield>service_lines</structfield>
+array according to hardware capabilities. Only if more precise control
+is needed should the programmer set the
+<structfield>service_lines</structfield> array explicitly.</para>
+
+ <para>The &VIDIOC-S-FMT; ioctl modifies the parameters
+according to hardware capabilities. When the driver allocates
+resources at this point, it may return an &EBUSY; if the required
+resources are temporarily unavailable. Other resource allocation
+points which may return <errorcode>EBUSY</errorcode> can be the
+&VIDIOC-STREAMON; ioctl and the first &func-read;, &func-write; and
+&func-select; call.</para>
+
+ <table frame="none" pgwide="1" id="v4l2-sliced-vbi-format">
+ <title>struct
+<structname>v4l2_sliced_vbi_format</structname></title>
+ <tgroup cols="5">
+ <colspec colname="c1" colwidth="3*" />
+ <colspec colname="c2" colwidth="3*" />
+ <colspec colname="c3" colwidth="2*" />
+ <colspec colname="c4" colwidth="2*" />
+ <colspec colname="c5" colwidth="2*" />
+ <spanspec namest="c3" nameend="c5" spanname="hspan" />
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>service_set</structfield></entry>
+ <entry spanname="hspan"><para>If
+<structfield>service_set</structfield> is non-zero when passed with
+&VIDIOC-S-FMT; or &VIDIOC-TRY-FMT;, the
+<structfield>service_lines</structfield> array will be filled by the
+driver according to the services specified in this field. For example,
+if <structfield>service_set</structfield> is initialized with
+<constant>V4L2_SLICED_TELETEXT_B | V4L2_SLICED_WSS_625</constant>, a
+driver for the cx25840 video decoder sets lines 7-22 of both
+fields<footnote><para>According to <link
+linkend="ets300706">ETS&nbsp;300&nbsp;706</link> lines 6-22 of the
+first field and lines 5-22 of the second field may carry Teletext
+data.</para></footnote> to <constant>V4L2_SLICED_TELETEXT_B</constant>
+and line 23 of the first field to
+<constant>V4L2_SLICED_WSS_625</constant>. If
+<structfield>service_set</structfield> is set to zero, then the values
+of <structfield>service_lines</structfield> will be used instead.
+</para><para>On return the driver sets this field to the union of all
+elements of the returned <structfield>service_lines</structfield>
+array. It may contain less services than requested, perhaps just one,
+if the hardware cannot handle more services simultaneously. It may be
+empty (zero) if none of the requested services are supported by the
+hardware.</para></entry>
+ </row>
+ <row>
+ <entry>__u16</entry>
+ <entry><structfield>service_lines</structfield>[2][24]</entry>
+ <entry spanname="hspan"><para>Applications initialize this
+array with sets of data services the driver shall look for or insert
+on the respective scan line. Subject to hardware capabilities drivers
+return the requested set, a subset, which may be just a single
+service, or an empty set. When the hardware cannot handle multiple
+services on the same line the driver shall choose one. No assumptions
+can be made on which service the driver chooses.</para><para>Data
+services are defined in <xref linkend="vbi-services2" />. Array indices
+map to ITU-R line numbers (see also <xref linkend="vbi-525" /> and <xref
+ linkend="vbi-625" />) as follows: <!-- No nested
+tables, sigh. --></para></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry>Element</entry>
+ <entry>525 line systems</entry>
+ <entry>625 line systems</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry><structfield>service_lines</structfield>[0][1]</entry>
+ <entry align="center">1</entry>
+ <entry align="center">1</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry><structfield>service_lines</structfield>[0][23]</entry>
+ <entry align="center">23</entry>
+ <entry align="center">23</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry><structfield>service_lines</structfield>[1][1]</entry>
+ <entry align="center">264</entry>
+ <entry align="center">314</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry><structfield>service_lines</structfield>[1][23]</entry>
+ <entry align="center">286</entry>
+ <entry align="center">336</entry>
+ </row>
+ <!-- End of line numbers table. -->
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry spanname="hspan">Drivers must set
+<structfield>service_lines</structfield>[0][0] and
+<structfield>service_lines</structfield>[1][0] to zero.
+The <constant>V4L2_VBI_ITU_525_F1_START</constant>,
+<constant>V4L2_VBI_ITU_525_F2_START</constant>,
+<constant>V4L2_VBI_ITU_625_F1_START</constant> and
+<constant>V4L2_VBI_ITU_625_F2_START</constant> defines give the start
+line numbers for each field for each 525 or 625 line format as a
+convenience. Don't forget that ITU line numbering starts at 1, not 0.
+</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>io_size</structfield></entry>
+ <entry spanname="hspan">Maximum number of bytes passed by
+one &func-read; or &func-write; call, and the buffer size in bytes for
+the &VIDIOC-QBUF; and &VIDIOC-DQBUF; ioctl. Drivers set this field to
+the size of &v4l2-sliced-vbi-data; times the number of non-zero
+elements in the returned <structfield>service_lines</structfield>
+array (that is the number of lines potentially carrying data).</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved</structfield>[2]</entry>
+ <entry spanname="hspan">This array is reserved for future
+extensions. Applications and drivers must set it to zero.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <!-- See also vidioc-g-sliced-vbi-cap.sgml -->
+ <table frame="none" pgwide="1" id="vbi-services2">
+ <title>Sliced VBI services</title>
+ <tgroup cols="5">
+ <colspec colname="c1" colwidth="2*" />
+ <colspec colname="c2" colwidth="1*" />
+ <colspec colname="c3" colwidth="1*" />
+ <colspec colname="c4" colwidth="2*" />
+ <colspec colname="c5" colwidth="2*" />
+ <spanspec namest="c3" nameend="c5" spanname="rlp" />
+ <thead>
+ <row>
+ <entry>Symbol</entry>
+ <entry>Value</entry>
+ <entry>Reference</entry>
+ <entry>Lines, usually</entry>
+ <entry>Payload</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_SLICED_TELETEXT_B</constant>
+(Teletext System B)</entry>
+ <entry>0x0001</entry>
+ <entry><xref linkend="ets300706" />, <xref linkend="itu653" /></entry>
+ <entry>PAL/SECAM line 7-22, 320-335 (second field 7-22)</entry>
+ <entry>Last 42 of the 45 byte Teletext packet, that is
+without clock run-in and framing code, lsb first transmitted.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_SLICED_VPS</constant></entry>
+ <entry>0x0400</entry>
+ <entry><xref linkend="ets300231" /></entry>
+ <entry>PAL line 16</entry>
+ <entry>Byte number 3 to 15 according to Figure 9 of
+ETS&nbsp;300&nbsp;231, lsb first transmitted.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_SLICED_CAPTION_525</constant></entry>
+ <entry>0x1000</entry>
+ <entry><xref linkend="cea608" /></entry>
+ <entry>NTSC line 21, 284 (second field 21)</entry>
+ <entry>Two bytes in transmission order, including parity
+bit, lsb first transmitted.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_SLICED_WSS_625</constant></entry>
+ <entry>0x4000</entry>
+ <entry><xref linkend="itu1119" />, <xref linkend="en300294" /></entry>
+ <entry>PAL/SECAM line 23</entry>
+ <entry><screen>
+Byte 0 1
+ msb lsb msb lsb
+ Bit 7 6 5 4 3 2 1 0 x x 13 12 11 10 9
+</screen></entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_SLICED_VBI_525</constant></entry>
+ <entry>0x1000</entry>
+ <entry spanname="rlp">Set of services applicable to 525
+line systems.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_SLICED_VBI_625</constant></entry>
+ <entry>0x4401</entry>
+ <entry spanname="rlp">Set of services applicable to 625
+line systems.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <para>Drivers may return an &EINVAL; when applications attempt to
+read or write data without prior format negotiation, after switching
+the video standard (which may invalidate the negotiated VBI
+parameters) and after switching the video input (which may change the
+video standard as a side effect). The &VIDIOC-S-FMT; ioctl may return
+an &EBUSY; when applications attempt to change the format while i/o is
+in progress (between a &VIDIOC-STREAMON; and &VIDIOC-STREAMOFF; call,
+and after the first &func-read; or &func-write; call).</para>
+ </section>
+
+ <section>
+ <title>Reading and writing sliced VBI data</title>
+
+ <para>A single &func-read; or &func-write; call must pass all data
+belonging to one video frame. That is an array of
+<structname>v4l2_sliced_vbi_data</structname> structures with one or
+more elements and a total size not exceeding
+<structfield>io_size</structfield> bytes. Likewise in streaming I/O
+mode one buffer of <structfield>io_size</structfield> bytes must
+contain data of one video frame. The <structfield>id</structfield> of
+unused <structname>v4l2_sliced_vbi_data</structname> elements must be
+zero.</para>
+
+ <table frame="none" pgwide="1" id="v4l2-sliced-vbi-data">
+ <title>struct
+<structname>v4l2_sliced_vbi_data</structname></title>
+ <tgroup cols="3">
+ &cs-def;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>id</structfield></entry>
+ <entry>A flag from <xref linkend="vbi-services" />
+identifying the type of data in this packet. Only a single bit must be
+set. When the <structfield>id</structfield> of a captured packet is
+zero, the packet is empty and the contents of other fields are
+undefined. Applications shall ignore empty packets. When the
+<structfield>id</structfield> of a packet for output is zero the
+contents of the <structfield>data</structfield> field are undefined
+and the driver must no longer insert data on the requested
+<structfield>field</structfield> and
+<structfield>line</structfield>.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>field</structfield></entry>
+ <entry>The video field number this data has been captured
+from, or shall be inserted at. <constant>0</constant> for the first
+field, <constant>1</constant> for the second field.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>line</structfield></entry>
+ <entry>The field (as opposed to frame) line number this
+data has been captured from, or shall be inserted at. See <xref
+ linkend="vbi-525" /> and <xref linkend="vbi-625" /> for valid
+values. Sliced VBI capture devices can set the line number of all
+packets to <constant>0</constant> if the hardware cannot reliably
+identify scan lines. The field number must always be valid.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved</structfield></entry>
+ <entry>This field is reserved for future extensions.
+Applications and drivers must set it to zero.</entry>
+ </row>
+ <row>
+ <entry>__u8</entry>
+ <entry><structfield>data</structfield>[48]</entry>
+ <entry>The packet payload. See <xref
+ linkend="vbi-services" /> for the contents and number of
+bytes passed for each data type. The contents of padding bytes at the
+end of this array are undefined, drivers and applications shall ignore
+them.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <para>Packets are always passed in ascending line number order,
+without duplicate line numbers. The &func-write; function and the
+&VIDIOC-QBUF; ioctl must return an &EINVAL; when applications violate
+this rule. They must also return an &EINVAL; when applications pass an
+incorrect field or line number, or a combination of
+<structfield>field</structfield>, <structfield>line</structfield> and
+<structfield>id</structfield> which has not been negotiated with the
+&VIDIOC-G-FMT; or &VIDIOC-S-FMT; ioctl. When the line numbers are
+unknown the driver must pass the packets in transmitted order. The
+driver can insert empty packets with <structfield>id</structfield> set
+to zero anywhere in the packet array.</para>
+
+ <para>To assure synchronization and to distinguish from frame
+dropping, when a captured frame does not carry any of the requested
+data services drivers must pass one or more empty packets. When an
+application fails to pass VBI data in time for output, the driver
+must output the last VPS and WSS packet again, and disable the output
+of Closed Caption and Teletext data, or output data which is ignored
+by Closed Caption and Teletext decoders.</para>
+
+ <para>A sliced VBI device may support <link
+linkend="rw">read/write</link> and/or streaming (<link
+linkend="mmap">memory mapping</link> and/or <link linkend="userp">user
+pointer</link>) I/O. The latter bears the possibility of synchronizing
+video and VBI data by using buffer timestamps.</para>
+
+ </section>
+
+ <section>
+ <title>Sliced VBI Data in MPEG Streams</title>
+
+ <para>If a device can produce an MPEG output stream, it may be
+capable of providing <link
+linkend="sliced-vbi-format-negotitation">negotiated sliced VBI
+services</link> as data embedded in the MPEG stream. Users or
+applications control this sliced VBI data insertion with the <link
+linkend="v4l2-mpeg-stream-vbi-fmt">V4L2_CID_MPEG_STREAM_VBI_FMT</link>
+control.</para>
+
+ <para>If the driver does not provide the <link
+linkend="v4l2-mpeg-stream-vbi-fmt">V4L2_CID_MPEG_STREAM_VBI_FMT</link>
+control, or only allows that control to be set to <link
+linkend="v4l2-mpeg-stream-vbi-fmt"><constant>
+V4L2_MPEG_STREAM_VBI_FMT_NONE</constant></link>, then the device
+cannot embed sliced VBI data in the MPEG stream.</para>
+
+ <para>The <link linkend="v4l2-mpeg-stream-vbi-fmt">
+V4L2_CID_MPEG_STREAM_VBI_FMT</link> control does not implicitly set
+the device driver to capture nor cease capturing sliced VBI data. The
+control only indicates to embed sliced VBI data in the MPEG stream, if
+an application has negotiated sliced VBI service be captured.</para>
+
+ <para>It may also be the case that a device can embed sliced VBI
+data in only certain types of MPEG streams: for example in an MPEG-2
+PS but not an MPEG-2 TS. In this situation, if sliced VBI data
+insertion is requested, the sliced VBI data will be embedded in MPEG
+stream types when supported, and silently omitted from MPEG stream
+types where sliced VBI data insertion is not supported by the device.
+</para>
+
+ <para>The following subsections specify the format of the
+embedded sliced VBI data.</para>
+
+ <section>
+ <title>MPEG Stream Embedded, Sliced VBI Data Format: NONE</title>
+ <para>The <link linkend="v4l2-mpeg-stream-vbi-fmt"><constant>
+V4L2_MPEG_STREAM_VBI_FMT_NONE</constant></link> embedded sliced VBI
+format shall be interpreted by drivers as a control to cease
+embedding sliced VBI data in MPEG streams. Neither the device nor
+driver shall insert "empty" embedded sliced VBI data packets in the
+MPEG stream when this format is set. No MPEG stream data structures
+are specified for this format.</para>
+ </section>
+
+ <section>
+ <title>MPEG Stream Embedded, Sliced VBI Data Format: IVTV</title>
+ <para>The <link linkend="v4l2-mpeg-stream-vbi-fmt"><constant>
+V4L2_MPEG_STREAM_VBI_FMT_IVTV</constant></link> embedded sliced VBI
+format, when supported, indicates to the driver to embed up to 36
+lines of sliced VBI data per frame in an MPEG-2 <emphasis>Private
+Stream 1 PES</emphasis> packet encapsulated in an MPEG-2 <emphasis>
+Program Pack</emphasis> in the MPEG stream.</para>
+
+ <para><emphasis>Historical context</emphasis>: This format
+specification originates from a custom, embedded, sliced VBI data
+format used by the <filename>ivtv</filename> driver. This format
+has already been informally specified in the kernel sources in the
+file <filename>Documentation/video4linux/cx2341x/README.vbi</filename>
+. The maximum size of the payload and other aspects of this format
+are driven by the CX23415 MPEG decoder's capabilities and limitations
+with respect to extracting, decoding, and displaying sliced VBI data
+embedded within an MPEG stream.</para>
+
+ <para>This format's use is <emphasis>not</emphasis> exclusive to
+the <filename>ivtv</filename> driver <emphasis>nor</emphasis>
+exclusive to CX2341x devices, as the sliced VBI data packet insertion
+into the MPEG stream is implemented in driver software. At least the
+<filename>cx18</filename> driver provides sliced VBI data insertion
+into an MPEG-2 PS in this format as well.</para>
+
+ <para>The following definitions specify the payload of the
+MPEG-2 <emphasis>Private Stream 1 PES</emphasis> packets that contain
+sliced VBI data when <link linkend="v4l2-mpeg-stream-vbi-fmt">
+<constant>V4L2_MPEG_STREAM_VBI_FMT_IVTV</constant></link> is set.
+(The MPEG-2 <emphasis>Private Stream 1 PES</emphasis> packet header
+and encapsulating MPEG-2 <emphasis>Program Pack</emphasis> header are
+not detailed here. Please refer to the MPEG-2 specifications for
+details on those packet headers.)</para>
+
+ <para>The payload of the MPEG-2 <emphasis>Private Stream 1 PES
+</emphasis> packets that contain sliced VBI data is specified by
+&v4l2-mpeg-vbi-fmt-ivtv;. The payload is variable
+length, depending on the actual number of lines of sliced VBI data
+present in a video frame. The payload may be padded at the end with
+unspecified fill bytes to align the end of the payload to a 4-byte
+boundary. The payload shall never exceed 1552 bytes (2 fields with
+18 lines/field with 43 bytes of data/line and a 4 byte magic number).
+</para>
+
+ <table frame="none" pgwide="1" id="v4l2-mpeg-vbi-fmt-ivtv">
+ <title>struct <structname>v4l2_mpeg_vbi_fmt_ivtv</structname>
+ </title>
+ <tgroup cols="4">
+ &cs-ustr;
+ <tbody valign="top">
+ <row>
+ <entry>__u8</entry>
+ <entry><structfield>magic</structfield>[4]</entry>
+ <entry></entry>
+ <entry>A "magic" constant from <xref
+ linkend="v4l2-mpeg-vbi-fmt-ivtv-magic" /> that indicates
+this is a valid sliced VBI data payload and also indicates which
+member of the anonymous union, <structfield>itv0</structfield> or
+<structfield>ITV0</structfield>, to use for the payload data.</entry>
+ </row>
+ <row>
+ <entry>union</entry>
+ <entry>(anonymous)</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>struct <link linkend="v4l2-mpeg-vbi-itv0">
+ <structname>v4l2_mpeg_vbi_itv0</structname></link>
+ </entry>
+ <entry><structfield>itv0</structfield></entry>
+ <entry>The primary form of the sliced VBI data payload
+that contains anywhere from 1 to 35 lines of sliced VBI data.
+Line masks are provided in this form of the payload indicating
+which VBI lines are provided.</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>struct <link linkend="v4l2-mpeg-vbi-itv0-1">
+ <structname>v4l2_mpeg_vbi_ITV0</structname></link>
+ </entry>
+ <entry><structfield>ITV0</structfield></entry>
+ <entry>An alternate form of the sliced VBI data payload
+used when 36 lines of sliced VBI data are present. No line masks are
+provided in this form of the payload; all valid line mask bits are
+implcitly set.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table frame="none" pgwide="1" id="v4l2-mpeg-vbi-fmt-ivtv-magic">
+ <title>Magic Constants for &v4l2-mpeg-vbi-fmt-ivtv;
+ <structfield>magic</structfield> field</title>
+ <tgroup cols="3">
+ &cs-def;
+ <thead>
+ <row>
+ <entry align="left">Defined Symbol</entry>
+ <entry align="left">Value</entry>
+ <entry align="left">Description</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_MPEG_VBI_IVTV_MAGIC0</constant>
+ </entry>
+ <entry>"itv0"</entry>
+ <entry>Indicates the <structfield>itv0</structfield>
+member of the union in &v4l2-mpeg-vbi-fmt-ivtv; is valid.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VBI_IVTV_MAGIC1</constant>
+ </entry>
+ <entry>"ITV0"</entry>
+ <entry>Indicates the <structfield>ITV0</structfield>
+member of the union in &v4l2-mpeg-vbi-fmt-ivtv; is valid and
+that 36 lines of sliced VBI data are present.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table frame="none" pgwide="1" id="v4l2-mpeg-vbi-itv0">
+ <title>struct <structname>v4l2_mpeg_vbi_itv0</structname>
+ </title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__le32</entry>
+ <entry><structfield>linemask</structfield>[2]</entry>
+ <entry><para>Bitmasks indicating the VBI service lines
+present. These <structfield>linemask</structfield> values are stored
+in little endian byte order in the MPEG stream. Some reference
+<structfield>linemask</structfield> bit positions with their
+corresponding VBI line number and video field are given below.
+b<subscript>0</subscript> indicates the least significant bit of a
+<structfield>linemask</structfield> value:<screen>
+<structfield>linemask</structfield>[0] b<subscript>0</subscript>: line 6 first field
+<structfield>linemask</structfield>[0] b<subscript>17</subscript>: line 23 first field
+<structfield>linemask</structfield>[0] b<subscript>18</subscript>: line 6 second field
+<structfield>linemask</structfield>[0] b<subscript>31</subscript>: line 19 second field
+<structfield>linemask</structfield>[1] b<subscript>0</subscript>: line 20 second field
+<structfield>linemask</structfield>[1] b<subscript>3</subscript>: line 23 second field
+<structfield>linemask</structfield>[1] b<subscript>4</subscript>-b<subscript>31</subscript>: unused and set to 0</screen></para></entry>
+ </row>
+ <row>
+ <entry>struct <link linkend="v4l2-mpeg-vbi-itv0-line">
+ <structname>v4l2_mpeg_vbi_itv0_line</structname></link>
+ </entry>
+ <entry><structfield>line</structfield>[35]</entry>
+ <entry>This is a variable length array that holds from 1
+to 35 lines of sliced VBI data. The sliced VBI data lines present
+correspond to the bits set in the <structfield>linemask</structfield>
+array, starting from b<subscript>0</subscript> of <structfield>
+linemask</structfield>[0] up through b<subscript>31</subscript> of
+<structfield>linemask</structfield>[0], and from b<subscript>0
+</subscript> of <structfield>linemask</structfield>[1] up through b
+<subscript>3</subscript> of <structfield>linemask</structfield>[1].
+<structfield>line</structfield>[0] corresponds to the first bit
+found set in the <structfield>linemask</structfield> array,
+<structfield>line</structfield>[1] corresponds to the second bit
+found set in the <structfield>linemask</structfield> array, etc.
+If no <structfield>linemask</structfield> array bits are set, then
+<structfield>line</structfield>[0] may contain one line of
+unspecified data that should be ignored by applications.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table frame="none" pgwide="1" id="v4l2-mpeg-vbi-itv0-1">
+ <title>struct <structname>v4l2_mpeg_vbi_ITV0</structname>
+ </title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>struct <link linkend="v4l2-mpeg-vbi-itv0-line">
+ <structname>v4l2_mpeg_vbi_itv0_line</structname></link>
+ </entry>
+ <entry><structfield>line</structfield>[36]</entry>
+ <entry>A fixed length array of 36 lines of sliced VBI
+data. <structfield>line</structfield>[0] through <structfield>line
+</structfield>[17] correspond to lines 6 through 23 of the
+first field. <structfield>line</structfield>[18] through
+<structfield>line</structfield>[35] corresponds to lines 6
+through 23 of the second field.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table frame="none" pgwide="1" id="v4l2-mpeg-vbi-itv0-line">
+ <title>struct <structname>v4l2_mpeg_vbi_itv0_line</structname>
+ </title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u8</entry>
+ <entry><structfield>id</structfield></entry>
+ <entry>A line identifier value from
+<xref linkend="ITV0-Line-Identifier-Constants" /> that indicates
+the type of sliced VBI data stored on this line.</entry>
+ </row>
+ <row>
+ <entry>__u8</entry>
+ <entry><structfield>data</structfield>[42]</entry>
+ <entry>The sliced VBI data for the line.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table frame="none" pgwide="1" id="ITV0-Line-Identifier-Constants">
+ <title>Line Identifiers for struct <link
+ linkend="v4l2-mpeg-vbi-itv0-line"><structname>
+v4l2_mpeg_vbi_itv0_line</structname></link> <structfield>id
+</structfield> field</title>
+ <tgroup cols="3">
+ &cs-def;
+ <thead>
+ <row>
+ <entry align="left">Defined Symbol</entry>
+ <entry align="left">Value</entry>
+ <entry align="left">Description</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_MPEG_VBI_IVTV_TELETEXT_B</constant>
+ </entry>
+ <entry>1</entry>
+ <entry>Refer to <link linkend="vbi-services2">
+Sliced VBI services</link> for a description of the line payload.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VBI_IVTV_CAPTION_525</constant>
+ </entry>
+ <entry>4</entry>
+ <entry>Refer to <link linkend="vbi-services2">
+Sliced VBI services</link> for a description of the line payload.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VBI_IVTV_WSS_625</constant>
+ </entry>
+ <entry>5</entry>
+ <entry>Refer to <link linkend="vbi-services2">
+Sliced VBI services</link> for a description of the line payload.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MPEG_VBI_IVTV_VPS</constant>
+ </entry>
+ <entry>7</entry>
+ <entry>Refer to <link linkend="vbi-services2">
+Sliced VBI services</link> for a description of the line payload.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ </section>
+ </section>
diff --git a/Documentation/DocBook/media/v4l/dev-subdev.xml b/Documentation/DocBook/media/v4l/dev-subdev.xml
new file mode 100644
index 000000000..4f0ba58c9
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/dev-subdev.xml
@@ -0,0 +1,484 @@
+ <title>Sub-device Interface</title>
+
+ <note>
+ <title>Experimental</title>
+ <para>This is an <link linkend="experimental">experimental</link>
+ interface and may change in the future.</para>
+ </note>
+
+ <para>The complex nature of V4L2 devices, where hardware is often made of
+ several integrated circuits that need to interact with each other in a
+ controlled way, leads to complex V4L2 drivers. The drivers usually reflect
+ the hardware model in software, and model the different hardware components
+ as software blocks called sub-devices.</para>
+
+ <para>V4L2 sub-devices are usually kernel-only objects. If the V4L2 driver
+ implements the media device API, they will automatically inherit from media
+ entities. Applications will be able to enumerate the sub-devices and discover
+ the hardware topology using the media entities, pads and links enumeration
+ API.</para>
+
+ <para>In addition to make sub-devices discoverable, drivers can also choose
+ to make them directly configurable by applications. When both the sub-device
+ driver and the V4L2 device driver support this, sub-devices will feature a
+ character device node on which ioctls can be called to
+ <itemizedlist>
+ <listitem><para>query, read and write sub-devices controls</para></listitem>
+ <listitem><para>subscribe and unsubscribe to events and retrieve them</para></listitem>
+ <listitem><para>negotiate image formats on individual pads</para></listitem>
+ </itemizedlist>
+ </para>
+
+ <para>Sub-device character device nodes, conventionally named
+ <filename>/dev/v4l-subdev*</filename>, use major number 81.</para>
+
+ <section>
+ <title>Controls</title>
+ <para>Most V4L2 controls are implemented by sub-device hardware. Drivers
+ usually merge all controls and expose them through video device nodes.
+ Applications can control all sub-devices through a single interface.</para>
+
+ <para>Complex devices sometimes implement the same control in different
+ pieces of hardware. This situation is common in embedded platforms, where
+ both sensors and image processing hardware implement identical functions,
+ such as contrast adjustment, white balance or faulty pixels correction. As
+ the V4L2 controls API doesn't support several identical controls in a single
+ device, all but one of the identical controls are hidden.</para>
+
+ <para>Applications can access those hidden controls through the sub-device
+ node with the V4L2 control API described in <xref linkend="control" />. The
+ ioctls behave identically as when issued on V4L2 device nodes, with the
+ exception that they deal only with controls implemented in the sub-device.
+ </para>
+
+ <para>Depending on the driver, those controls might also be exposed through
+ one (or several) V4L2 device nodes.</para>
+ </section>
+
+ <section>
+ <title>Events</title>
+ <para>V4L2 sub-devices can notify applications of events as described in
+ <xref linkend="event" />. The API behaves identically as when used on V4L2
+ device nodes, with the exception that it only deals with events generated by
+ the sub-device. Depending on the driver, those events might also be reported
+ on one (or several) V4L2 device nodes.</para>
+ </section>
+
+ <section id="pad-level-formats">
+ <title>Pad-level Formats</title>
+
+ <warning><para>Pad-level formats are only applicable to very complex device that
+ need to expose low-level format configuration to user space. Generic V4L2
+ applications do <emphasis>not</emphasis> need to use the API described in
+ this section.</para></warning>
+
+ <note><para>For the purpose of this section, the term
+ <wordasword>format</wordasword> means the combination of media bus data
+ format, frame width and frame height.</para></note>
+
+ <para>Image formats are typically negotiated on video capture and
+ output devices using the format and <link
+ linkend="vidioc-subdev-g-selection">selection</link> ioctls. The
+ driver is responsible for configuring every block in the video
+ pipeline according to the requested format at the pipeline input
+ and/or output.</para>
+
+ <para>For complex devices, such as often found in embedded systems,
+ identical image sizes at the output of a pipeline can be achieved using
+ different hardware configurations. One such example is shown on
+ <xref linkend="pipeline-scaling" />, where
+ image scaling can be performed on both the video sensor and the host image
+ processing hardware.</para>
+
+ <figure id="pipeline-scaling">
+ <title>Image Format Negotiation on Pipelines</title>
+ <mediaobject>
+ <imageobject>
+ <imagedata fileref="pipeline.pdf" format="PS" />
+ </imageobject>
+ <imageobject>
+ <imagedata fileref="pipeline.png" format="PNG" />
+ </imageobject>
+ <textobject>
+ <phrase>High quality and high speed pipeline configuration</phrase>
+ </textobject>
+ </mediaobject>
+ </figure>
+
+ <para>The sensor scaler is usually of less quality than the host scaler, but
+ scaling on the sensor is required to achieve higher frame rates. Depending
+ on the use case (quality vs. speed), the pipeline must be configured
+ differently. Applications need to configure the formats at every point in
+ the pipeline explicitly.</para>
+
+ <para>Drivers that implement the <link linkend="media-controller-intro">media
+ API</link> can expose pad-level image format configuration to applications.
+ When they do, applications can use the &VIDIOC-SUBDEV-G-FMT; and
+ &VIDIOC-SUBDEV-S-FMT; ioctls. to negotiate formats on a per-pad basis.</para>
+
+ <para>Applications are responsible for configuring coherent parameters on
+ the whole pipeline and making sure that connected pads have compatible
+ formats. The pipeline is checked for formats mismatch at &VIDIOC-STREAMON;
+ time, and an &EPIPE; is then returned if the configuration is
+ invalid.</para>
+
+ <para>Pad-level image format configuration support can be tested by calling
+ the &VIDIOC-SUBDEV-G-FMT; ioctl on pad 0. If the driver returns an &EINVAL;
+ pad-level format configuration is not supported by the sub-device.</para>
+
+ <section>
+ <title>Format Negotiation</title>
+
+ <para>Acceptable formats on pads can (and usually do) depend on a number
+ of external parameters, such as formats on other pads, active links, or
+ even controls. Finding a combination of formats on all pads in a video
+ pipeline, acceptable to both application and driver, can't rely on formats
+ enumeration only. A format negotiation mechanism is required.</para>
+
+ <para>Central to the format negotiation mechanism are the get/set format
+ operations. When called with the <structfield>which</structfield> argument
+ set to <constant>V4L2_SUBDEV_FORMAT_TRY</constant>, the
+ &VIDIOC-SUBDEV-G-FMT; and &VIDIOC-SUBDEV-S-FMT; ioctls operate on a set of
+ formats parameters that are not connected to the hardware configuration.
+ Modifying those 'try' formats leaves the device state untouched (this
+ applies to both the software state stored in the driver and the hardware
+ state stored in the device itself).</para>
+
+ <para>While not kept as part of the device state, try formats are stored
+ in the sub-device file handles. A &VIDIOC-SUBDEV-G-FMT; call will return
+ the last try format set <emphasis>on the same sub-device file
+ handle</emphasis>. Several applications querying the same sub-device at
+ the same time will thus not interact with each other.</para>
+
+ <para>To find out whether a particular format is supported by the device,
+ applications use the &VIDIOC-SUBDEV-S-FMT; ioctl. Drivers verify and, if
+ needed, change the requested <structfield>format</structfield> based on
+ device requirements and return the possibly modified value. Applications
+ can then choose to try a different format or accept the returned value and
+ continue.</para>
+
+ <para>Formats returned by the driver during a negotiation iteration are
+ guaranteed to be supported by the device. In particular, drivers guarantee
+ that a returned format will not be further changed if passed to an
+ &VIDIOC-SUBDEV-S-FMT; call as-is (as long as external parameters, such as
+ formats on other pads or links' configuration are not changed).</para>
+
+ <para>Drivers automatically propagate formats inside sub-devices. When a
+ try or active format is set on a pad, corresponding formats on other pads
+ of the same sub-device can be modified by the driver. Drivers are free to
+ modify formats as required by the device. However, they should comply with
+ the following rules when possible:
+ <itemizedlist>
+ <listitem><para>Formats should be propagated from sink pads to source pads.
+ Modifying a format on a source pad should not modify the format on any
+ sink pad.</para></listitem>
+ <listitem><para>Sub-devices that scale frames using variable scaling factors
+ should reset the scale factors to default values when sink pads formats
+ are modified. If the 1:1 scaling ratio is supported, this means that
+ source pads formats should be reset to the sink pads formats.</para></listitem>
+ </itemizedlist>
+ </para>
+
+ <para>Formats are not propagated across links, as that would involve
+ propagating them from one sub-device file handle to another. Applications
+ must then take care to configure both ends of every link explicitly with
+ compatible formats. Identical formats on the two ends of a link are
+ guaranteed to be compatible. Drivers are free to accept different formats
+ matching device requirements as being compatible.</para>
+
+ <para><xref linkend="sample-pipeline-config" />
+ shows a sample configuration sequence for the pipeline described in
+ <xref linkend="pipeline-scaling" /> (table
+ columns list entity names and pad numbers).</para>
+
+ <table pgwide="0" frame="none" id="sample-pipeline-config">
+ <title>Sample Pipeline Configuration</title>
+ <tgroup cols="3">
+ <colspec colname="what"/>
+ <colspec colname="sensor-0 format" />
+ <colspec colname="frontend-0 format" />
+ <colspec colname="frontend-1 format" />
+ <colspec colname="scaler-0 format" />
+ <colspec colname="scaler-0 compose" />
+ <colspec colname="scaler-1 format" />
+ <thead>
+ <row>
+ <entry></entry>
+ <entry>Sensor/0 format</entry>
+ <entry>Frontend/0 format</entry>
+ <entry>Frontend/1 format</entry>
+ <entry>Scaler/0 format</entry>
+ <entry>Scaler/0 compose selection rectangle</entry>
+ <entry>Scaler/1 format</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row>
+ <entry>Initial state</entry>
+ <entry>2048x1536/SGRBG8_1X8</entry>
+ <entry>(default)</entry>
+ <entry>(default)</entry>
+ <entry>(default)</entry>
+ <entry>(default)</entry>
+ <entry>(default)</entry>
+ </row>
+ <row>
+ <entry>Configure frontend sink format</entry>
+ <entry>2048x1536/SGRBG8_1X8</entry>
+ <entry><emphasis>2048x1536/SGRBG8_1X8</emphasis></entry>
+ <entry><emphasis>2046x1534/SGRBG8_1X8</emphasis></entry>
+ <entry>(default)</entry>
+ <entry>(default)</entry>
+ <entry>(default)</entry>
+ </row>
+ <row>
+ <entry>Configure scaler sink format</entry>
+ <entry>2048x1536/SGRBG8_1X8</entry>
+ <entry>2048x1536/SGRBG8_1X8</entry>
+ <entry>2046x1534/SGRBG8_1X8</entry>
+ <entry><emphasis>2046x1534/SGRBG8_1X8</emphasis></entry>
+ <entry><emphasis>0,0/2046x1534</emphasis></entry>
+ <entry><emphasis>2046x1534/SGRBG8_1X8</emphasis></entry>
+ </row>
+ <row>
+ <entry>Configure scaler sink compose selection</entry>
+ <entry>2048x1536/SGRBG8_1X8</entry>
+ <entry>2048x1536/SGRBG8_1X8</entry>
+ <entry>2046x1534/SGRBG8_1X8</entry>
+ <entry>2046x1534/SGRBG8_1X8</entry>
+ <entry><emphasis>0,0/1280x960</emphasis></entry>
+ <entry><emphasis>1280x960/SGRBG8_1X8</emphasis></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <para>
+ <orderedlist>
+ <listitem><para>Initial state. The sensor source pad format is
+ set to its native 3MP size and V4L2_MBUS_FMT_SGRBG8_1X8
+ media bus code. Formats on the host frontend and scaler sink
+ and source pads have the default values, as well as the
+ compose rectangle on the scaler's sink pad.</para></listitem>
+
+ <listitem><para>The application configures the frontend sink
+ pad format's size to 2048x1536 and its media bus code to
+ V4L2_MBUS_FMT_SGRBG_1X8. The driver propagates the format to
+ the frontend source pad.</para></listitem>
+
+ <listitem><para>The application configures the scaler sink pad
+ format's size to 2046x1534 and the media bus code to
+ V4L2_MBUS_FMT_SGRBG_1X8 to match the frontend source size and
+ media bus code. The media bus code on the sink pad is set to
+ V4L2_MBUS_FMT_SGRBG_1X8. The driver propagates the size to the
+ compose selection rectangle on the scaler's sink pad, and the
+ format to the scaler source pad.</para></listitem>
+
+ <listitem><para>The application configures the size of the compose
+ selection rectangle of the scaler's sink pad 1280x960. The driver
+ propagates the size to the scaler's source pad
+ format.</para></listitem>
+
+ </orderedlist>
+ </para>
+
+ <para>When satisfied with the try results, applications can set the active
+ formats by setting the <structfield>which</structfield> argument to
+ <constant>V4L2_SUBDEV_FORMAT_ACTIVE</constant>. Active formats are changed
+ exactly as try formats by drivers. To avoid modifying the hardware state
+ during format negotiation, applications should negotiate try formats first
+ and then modify the active settings using the try formats returned during
+ the last negotiation iteration. This guarantees that the active format
+ will be applied as-is by the driver without being modified.
+ </para>
+ </section>
+
+ <section id="v4l2-subdev-selections">
+ <title>Selections: cropping, scaling and composition</title>
+
+ <para>Many sub-devices support cropping frames on their input or output
+ pads (or possible even on both). Cropping is used to select the area of
+ interest in an image, typically on an image sensor or a video decoder. It can
+ also be used as part of digital zoom implementations to select the area of
+ the image that will be scaled up.</para>
+
+ <para>Crop settings are defined by a crop rectangle and represented in a
+ &v4l2-rect; by the coordinates of the top left corner and the rectangle
+ size. Both the coordinates and sizes are expressed in pixels.</para>
+
+ <para>As for pad formats, drivers store try and active
+ rectangles for the selection targets <xref
+ linkend="v4l2-selections-common" />.</para>
+
+ <para>On sink pads, cropping is applied relative to the
+ current pad format. The pad format represents the image size as
+ received by the sub-device from the previous block in the
+ pipeline, and the crop rectangle represents the sub-image that
+ will be transmitted further inside the sub-device for
+ processing.</para>
+
+ <para>The scaling operation changes the size of the image by
+ scaling it to new dimensions. The scaling ratio isn't specified
+ explicitly, but is implied from the original and scaled image
+ sizes. Both sizes are represented by &v4l2-rect;.</para>
+
+ <para>Scaling support is optional. When supported by a subdev,
+ the crop rectangle on the subdev's sink pad is scaled to the
+ size configured using the &VIDIOC-SUBDEV-S-SELECTION; IOCTL
+ using <constant>V4L2_SEL_TGT_COMPOSE</constant>
+ selection target on the same pad. If the subdev supports scaling
+ but not composing, the top and left values are not used and must
+ always be set to zero.</para>
+
+ <para>On source pads, cropping is similar to sink pads, with the
+ exception that the source size from which the cropping is
+ performed, is the COMPOSE rectangle on the sink pad. In both
+ sink and source pads, the crop rectangle must be entirely
+ contained inside the source image size for the crop
+ operation.</para>
+
+ <para>The drivers should always use the closest possible
+ rectangle the user requests on all selection targets, unless
+ specifically told otherwise.
+ <constant>V4L2_SEL_FLAG_GE</constant> and
+ <constant>V4L2_SEL_FLAG_LE</constant> flags may be
+ used to round the image size either up or down. <xref
+ linkend="v4l2-selection-flags" /></para>
+ </section>
+
+ <section>
+ <title>Types of selection targets</title>
+
+ <section>
+ <title>Actual targets</title>
+
+ <para>Actual targets (without a postfix) reflect the actual
+ hardware configuration at any point of time. There is a BOUNDS
+ target corresponding to every actual target.</para>
+ </section>
+
+ <section>
+ <title>BOUNDS targets</title>
+
+ <para>BOUNDS targets is the smallest rectangle that contains all
+ valid actual rectangles. It may not be possible to set the actual
+ rectangle as large as the BOUNDS rectangle, however. This may be
+ because e.g. a sensor's pixel array is not rectangular but
+ cross-shaped or round. The maximum size may also be smaller than the
+ BOUNDS rectangle.</para>
+ </section>
+
+ </section>
+
+ <section>
+ <title>Order of configuration and format propagation</title>
+
+ <para>Inside subdevs, the order of image processing steps will
+ always be from the sink pad towards the source pad. This is also
+ reflected in the order in which the configuration must be
+ performed by the user: the changes made will be propagated to
+ any subsequent stages. If this behaviour is not desired, the
+ user must set
+ <constant>V4L2_SEL_FLAG_KEEP_CONFIG</constant> flag. This
+ flag causes no propagation of the changes are allowed in any
+ circumstances. This may also cause the accessed rectangle to be
+ adjusted by the driver, depending on the properties of the
+ underlying hardware.</para>
+
+ <para>The coordinates to a step always refer to the actual size
+ of the previous step. The exception to this rule is the source
+ compose rectangle, which refers to the sink compose bounds
+ rectangle --- if it is supported by the hardware.</para>
+
+ <orderedlist>
+ <listitem><para>Sink pad format. The user configures the sink pad
+ format. This format defines the parameters of the image the
+ entity receives through the pad for further processing.</para></listitem>
+
+ <listitem><para>Sink pad actual crop selection. The sink pad crop
+ defines the crop performed to the sink pad format.</para></listitem>
+
+ <listitem><para>Sink pad actual compose selection. The size of the
+ sink pad compose rectangle defines the scaling ratio compared
+ to the size of the sink pad crop rectangle. The location of
+ the compose rectangle specifies the location of the actual
+ sink compose rectangle in the sink compose bounds
+ rectangle.</para></listitem>
+
+ <listitem><para>Source pad actual crop selection. Crop on the source
+ pad defines crop performed to the image in the sink compose
+ bounds rectangle.</para></listitem>
+
+ <listitem><para>Source pad format. The source pad format defines the
+ output pixel format of the subdev, as well as the other
+ parameters with the exception of the image width and height.
+ Width and height are defined by the size of the source pad
+ actual crop selection.</para></listitem>
+ </orderedlist>
+
+ <para>Accessing any of the above rectangles not supported by the
+ subdev will return <constant>EINVAL</constant>. Any rectangle
+ referring to a previous unsupported rectangle coordinates will
+ instead refer to the previous supported rectangle. For example,
+ if sink crop is not supported, the compose selection will refer
+ to the sink pad format dimensions instead.</para>
+
+ <figure id="subdev-image-processing-crop">
+ <title>Image processing in subdevs: simple crop example</title>
+ <mediaobject>
+ <imageobject>
+ <imagedata fileref="subdev-image-processing-crop.svg"
+ format="SVG" scale="200" />
+ </imageobject>
+ </mediaobject>
+ </figure>
+
+ <para>In the above example, the subdev supports cropping on its
+ sink pad. To configure it, the user sets the media bus format on
+ the subdev's sink pad. Now the actual crop rectangle can be set
+ on the sink pad --- the location and size of this rectangle
+ reflect the location and size of a rectangle to be cropped from
+ the sink format. The size of the sink crop rectangle will also
+ be the size of the format of the subdev's source pad.</para>
+
+ <figure id="subdev-image-processing-scaling-multi-source">
+ <title>Image processing in subdevs: scaling with multiple sources</title>
+ <mediaobject>
+ <imageobject>
+ <imagedata fileref="subdev-image-processing-scaling-multi-source.svg"
+ format="SVG" scale="200" />
+ </imageobject>
+ </mediaobject>
+ </figure>
+
+ <para>In this example, the subdev is capable of first cropping,
+ then scaling and finally cropping for two source pads
+ individually from the resulting scaled image. The location of
+ the scaled image in the cropped image is ignored in sink compose
+ target. Both of the locations of the source crop rectangles
+ refer to the sink scaling rectangle, independently cropping an
+ area at location specified by the source crop rectangle from
+ it.</para>
+
+ <figure id="subdev-image-processing-full">
+ <title>Image processing in subdevs: scaling and composition
+ with multiple sinks and sources</title>
+ <mediaobject>
+ <imageobject>
+ <imagedata fileref="subdev-image-processing-full.svg"
+ format="SVG" scale="200" />
+ </imageobject>
+ </mediaobject>
+ </figure>
+
+ <para>The subdev driver supports two sink pads and two source
+ pads. The images from both of the sink pads are individually
+ cropped, then scaled and further composed on the composition
+ bounds rectangle. From that, two independent streams are cropped
+ and sent out of the subdev from the source pads.</para>
+
+ </section>
+
+ </section>
+
+ &sub-subdev-formats;
diff --git a/Documentation/DocBook/media/v4l/dev-teletext.xml b/Documentation/DocBook/media/v4l/dev-teletext.xml
new file mode 100644
index 000000000..bd21c64d7
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/dev-teletext.xml
@@ -0,0 +1,29 @@
+ <title>Teletext Interface</title>
+
+ <para>This interface was aimed at devices receiving and demodulating
+Teletext data [<xref linkend="ets300706" />, <xref linkend="itu653" />], evaluating the
+Teletext packages and storing formatted pages in cache memory. Such
+devices are usually implemented as microcontrollers with serial
+interface (I<superscript>2</superscript>C) and could be found on old
+TV cards, dedicated Teletext decoding cards and home-brew devices
+connected to the PC parallel port.</para>
+
+ <para>The Teletext API was designed by Martin Buck. It was defined in
+the kernel header file <filename>linux/videotext.h</filename>, the
+specification is available from <ulink url="ftp://ftp.gwdg.de/pub/linux/misc/videotext/">
+ftp://ftp.gwdg.de/pub/linux/misc/videotext/</ulink>. (Videotext is the name of
+the German public television Teletext service.)</para>
+
+ <para>Eventually the Teletext API was integrated into the V4L API
+with character device file names <filename>/dev/vtx0</filename> to
+<filename>/dev/vtx31</filename>, device major number 81, minor numbers
+192 to 223.</para>
+
+ <para>However, teletext decoders were quickly replaced by more
+generic VBI demodulators and those dedicated teletext decoders no longer exist.
+For many years the vtx devices were still around, even though nobody used
+them. So the decision was made to finally remove support for the Teletext API in
+kernel 2.6.37.</para>
+
+ <para>Modern devices all use the <link linkend="raw-vbi">raw</link> or
+<link linkend="sliced">sliced</link> VBI API.</para>
diff --git a/Documentation/DocBook/media/v4l/driver.xml b/Documentation/DocBook/media/v4l/driver.xml
new file mode 100644
index 000000000..7c6638bac
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/driver.xml
@@ -0,0 +1,200 @@
+ <title>V4L2 Driver Programming</title>
+
+ <!-- This part defines the interface between the "videodev"
+ module and individual drivers. -->
+
+ <para>to do</para>
+<!--
+ <para>V4L2 is a two-layer driver system. The top layer is the "videodev"
+kernel module. When videodev initializes it registers as character device
+with major number 81, and it registers a set of file operations. All V4L2
+drivers are really clients of videodev, which calls V4L2 drivers through
+driver method functions. V4L2 drivers are also written as kernel modules.
+After probing the hardware they register one or more devices with
+videodev.</para>
+
+ <section id="driver-modules">
+ <title>Driver Modules</title>
+
+ <para>V4L2 driver modules must have an initialization function which is
+called after the module was loaded into kernel, an exit function whis is
+called before the module is removed. When the driver is compiled into the
+kernel these functions called at system boot and shutdown time.</para>
+
+ <informalexample>
+ <programlisting>
+#include &lt;linux/module.h&gt;
+
+/* Export information about this module. For details and other useful
+ macros see <filename>linux/module.h</filename>. */
+MODULE_DESCRIPTION("my - driver for my hardware");
+MODULE_AUTHOR("Your name here");
+MODULE_LICENSE("GPL");
+
+static void
+my_module_exit (void)
+{
+ /* Free all resources allocated by my_module_init(). */
+}
+
+static int
+my_module_init (void)
+{
+ /* Bind the driver to the supported hardware, see
+ <link linkend="driver-pci"> and
+ <link linkend="driver-usb"> for examples. */
+
+ return 0; /* a negative value on error, 0 on success. */
+}
+
+/* Export module functions. */
+module_init (my_module_init);
+module_exit (my_module_exit);
+</programlisting>
+ </informalexample>
+
+ <para>Users can add parameters when kernel modules are inserted:</para>
+
+ <informalexample>
+ <programlisting>
+include &lt;linux/moduleparam.h&gt;
+
+static int my_option = 123;
+static int my_option_array[47];
+
+/* Export the symbol, an int, with access permissions 0664.
+ See <filename>linux/moduleparam.h</filename> for other types. */
+module_param (my_option, int, 0644);
+module_param_array (my_option_array, int, NULL, 0644);
+
+MODULE_PARM_DESC (my_option, "Does magic things, default 123");
+</programlisting>
+ </informalexample>
+
+ <para>One parameter should be supported by all V4L2 drivers, the minor
+number of the device it will register. Purpose is to predictably link V4L2
+drivers to device nodes if more than one video device is installed. Use the
+name of the device node followed by a "_nr" suffix, for example "video_nr"
+for <filename>/dev/video</filename>.</para>
+
+ <informalexample>
+ <programlisting>
+/* Minor number of the device, -1 to allocate the first unused. */
+static int video_nr = -1;
+
+module_param (video_nr, int, 0444);
+</programlisting>
+ </informalexample>
+ </section>
+
+ <section id="driver-pci">
+ <title>PCI Devices</title>
+
+ <para>PCI devices are initialized like this:</para>
+
+ <informalexample>
+ <programlisting>
+typedef struct {
+ /* State of one physical device. */
+} my_device;
+
+static int
+my_resume (struct pci_dev * pci_dev)
+{
+ /* Restore the suspended device to working state. */
+}
+
+static int
+my_suspend (struct pci_dev * pci_dev,
+ pm_message_t state)
+{
+ /* This function is called before the system goes to sleep.
+ Stop all DMAs and disable interrupts, then put the device
+ into a low power state. For details see the kernel
+ sources under <filename>Documentation/power</filename>. */
+
+ return 0; /* a negative value on error, 0 on success. */
+}
+
+static void
+my_remove (struct pci_dev * pci_dev)
+{
+ my_device *my = pci_get_drvdata (pci_dev);
+
+ /* Describe me. */
+}
+
+static int
+my_probe (struct pci_dev * pci_dev,
+ const struct pci_device_id * pci_id)
+{
+ my_device *my;
+
+ /* Describe me. */
+
+ /* You can allocate per-device data here and store a pointer
+ to it in the pci_dev structure. */
+ my = ...;
+ pci_set_drvdata (pci_dev, my);
+
+ return 0; /* a negative value on error, 0 on success. */
+}
+
+/* A list of supported PCI devices. */
+static struct pci_device_id
+my_pci_device_ids [] = {
+ { PCI_VENDOR_ID_FOO, PCI_DEVICE_ID_BAR,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
+ { 0 } /* end of list */
+};
+
+/* Load our module if supported PCI devices are installed. */
+MODULE_DEVICE_TABLE (pci, my_pci_device_ids);
+
+static struct pci_driver
+my_pci_driver = {
+ .name = "my",
+ .id_table = my_pci_device_ids,
+
+ .probe = my_probe,
+ .remove = my_remove,
+
+ /* Power management functions. */
+ .suspend = my_suspend,
+ .resume = my_resume,
+};
+
+static void
+my_module_exit (void)
+{
+ pci_unregister_driver (&my_pci_driver);
+}
+
+static int
+my_module_init (void)
+{
+ return pci_register_driver (&my_pci_driver);
+}
+</programlisting>
+ </informalexample>
+ </section>
+
+ <section id="driver-usb">
+ <title>USB Devices</title>
+ <para>to do</para>
+ </section>
+ <section id="driver-registering">
+ <title>Registering V4L2 Drivers</title>
+
+ <para>After a V4L2 driver probed the hardware it registers one or more
+devices with the videodev module.</para>
+ </section>
+ <section id="driver-file-ops">
+ <title>File Operations</title>
+ <para>to do</para>
+ </section>
+ <section id="driver-internal-api">
+ <title>Internal API</title>
+ <para>to do</para>
+ </section>
+-->
diff --git a/Documentation/DocBook/media/v4l/fdl-appendix.xml b/Documentation/DocBook/media/v4l/fdl-appendix.xml
new file mode 100644
index 000000000..ae22394ba
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/fdl-appendix.xml
@@ -0,0 +1,671 @@
+<!--
+ The GNU Free Documentation License 1.1 in DocBook
+ Markup by Eric Baudais <baudais@okstate.edu>
+ Maintained by the GNOME Documentation Project
+ http://live.gnome.org/DocumentationProject
+ Version: 1.0.1
+ Last Modified: Nov 16, 2000
+-->
+
+<appendix id="fdl">
+ <appendixinfo>
+ <releaseinfo>
+ Version 1.1, March 2000
+ </releaseinfo>
+ <copyright>
+ <year>2000</year><holder>Free Software Foundation, Inc.</holder>
+ </copyright>
+ <legalnotice id="fdl-legalnotice">
+ <para>
+ <address>Free Software Foundation, Inc. <street>59 Temple Place,
+ Suite 330</street>, <city>Boston</city>, <state>MA</state>
+ <postcode>02111-1307</postcode> <country>USA</country></address>
+ Everyone is permitted to copy and distribute verbatim copies of this
+ license document, but changing it is not allowed.
+ </para>
+ </legalnotice>
+ </appendixinfo>
+ <title>GNU Free Documentation License</title>
+
+ <sect1 id="fdl-preamble">
+ <title>0. PREAMBLE</title>
+ <para>
+ The purpose of this License is to make a manual, textbook, or
+ other written document <quote>free</quote> in the sense of
+ freedom: to assure everyone the effective freedom to copy and
+ redistribute it, with or without modifying it, either
+ commercially or noncommercially. Secondarily, this License
+ preserves for the author and publisher a way to get credit for
+ their work, while not being considered responsible for
+ modifications made by others.
+ </para>
+
+ <para>
+ This License is a kind of <quote>copyleft</quote>, which means
+ that derivative works of the document must themselves be free in
+ the same sense. It complements the GNU General Public License,
+ which is a copyleft license designed for free software.
+ </para>
+
+ <para>
+ We have designed this License in order to use it for manuals for
+ free software, because free software needs free documentation: a
+ free program should come with manuals providing the same
+ freedoms that the software does. But this License is not limited
+ to software manuals; it can be used for any textual work,
+ regardless of subject matter or whether it is published as a
+ printed book. We recommend this License principally for works
+ whose purpose is instruction or reference.
+ </para>
+ </sect1>
+ <sect1 id="fdl-section1">
+ <title>1. APPLICABILITY AND DEFINITIONS</title>
+ <para id="fdl-document">
+ This License applies to any manual or other work that contains a
+ notice placed by the copyright holder saying it can be
+ distributed under the terms of this License. The
+ <quote>Document</quote>, below, refers to any such manual or
+ work. Any member of the public is a licensee, and is addressed
+ as <quote>you</quote>.
+ </para>
+
+ <para id="fdl-modified">
+ A <quote>Modified Version</quote> of the Document means any work
+ containing the Document or a portion of it, either copied
+ verbatim, or with modifications and/or translated into another
+ language.
+ </para>
+
+ <para id="fdl-secondary">
+ A <quote>Secondary Section</quote> is a named appendix or a
+ front-matter section of the <link
+ linkend="fdl-document">Document</link> that deals exclusively
+ with the relationship of the publishers or authors of the
+ Document to the Document's overall subject (or to related
+ matters) and contains nothing that could fall directly within
+ that overall subject. (For example, if the Document is in part a
+ textbook of mathematics, a Secondary Section may not explain any
+ mathematics.) The relationship could be a matter of historical
+ connection with the subject or with related matters, or of
+ legal, commercial, philosophical, ethical or political position
+ regarding them.
+ </para>
+
+ <para id="fdl-invariant">
+ The <quote>Invariant Sections</quote> are certain <link
+ linkend="fdl-secondary"> Secondary Sections</link> whose titles
+ are designated, as being those of Invariant Sections, in the
+ notice that says that the <link
+ linkend="fdl-document">Document</link> is released under this
+ License.
+ </para>
+
+ <para id="fdl-cover-texts">
+ The <quote>Cover Texts</quote> are certain short passages of
+ text that are listed, as Front-Cover Texts or Back-Cover Texts,
+ in the notice that says that the <link
+ linkend="fdl-document">Document</link> is released under this
+ License.
+ </para>
+
+ <para id="fdl-transparent">
+ A <quote>Transparent</quote> copy of the <link
+ linkend="fdl-document"> Document</link> means a machine-readable
+ copy, represented in a format whose specification is available
+ to the general public, whose contents can be viewed and edited
+ directly and straightforwardly with generic text editors or (for
+ images composed of pixels) generic paint programs or (for
+ drawings) some widely available drawing editor, and that is
+ suitable for input to text formatters or for automatic
+ translation to a variety of formats suitable for input to text
+ formatters. A copy made in an otherwise Transparent file format
+ whose markup has been designed to thwart or discourage
+ subsequent modification by readers is not Transparent. A copy
+ that is not <quote>Transparent</quote> is called
+ <quote>Opaque</quote>.
+ </para>
+
+ <para>
+ Examples of suitable formats for Transparent copies include
+ plain ASCII without markup, Texinfo input format, LaTeX input
+ format, SGML or XML using a publicly available DTD, and
+ standard-conforming simple HTML designed for human
+ modification. Opaque formats include PostScript, PDF,
+ proprietary formats that can be read and edited only by
+ proprietary word processors, SGML or XML for which the DTD
+ and/or processing tools are not generally available, and the
+ machine-generated HTML produced by some word processors for
+ output purposes only.
+ </para>
+
+ <para id="fdl-title-page">
+ The <quote>Title Page</quote> means, for a printed book, the
+ title page itself, plus such following pages as are needed to
+ hold, legibly, the material this License requires to appear in
+ the title page. For works in formats which do not have any title
+ page as such, <quote>Title Page</quote> means the text near the
+ most prominent appearance of the work's title, preceding the
+ beginning of the body of the text.
+ </para>
+ </sect1>
+
+ <sect1 id="fdl-section2">
+ <title>2. VERBATIM COPYING</title>
+ <para>
+ You may copy and distribute the <link
+ linkend="fdl-document">Document</link> in any medium, either
+ commercially or noncommercially, provided that this License, the
+ copyright notices, and the license notice saying this License
+ applies to the Document are reproduced in all copies, and that
+ you add no other conditions whatsoever to those of this
+ License. You may not use technical measures to obstruct or
+ control the reading or further copying of the copies you make or
+ distribute. However, you may accept compensation in exchange for
+ copies. If you distribute a large enough number of copies you
+ must also follow the conditions in <link
+ linkend="fdl-section3">section 3</link>.
+ </para>
+
+ <para>
+ You may also lend copies, under the same conditions stated
+ above, and you may publicly display copies.
+ </para>
+ </sect1>
+
+ <sect1 id="fdl-section3">
+ <title>3. COPYING IN QUANTITY</title>
+ <para>
+ If you publish printed copies of the <link
+ linkend="fdl-document">Document</link> numbering more than 100,
+ and the Document's license notice requires <link
+ linkend="fdl-cover-texts">Cover Texts</link>, you must enclose
+ the copies in covers that carry, clearly and legibly, all these
+ Cover Texts: Front-Cover Texts on the front cover, and
+ Back-Cover Texts on the back cover. Both covers must also
+ clearly and legibly identify you as the publisher of these
+ copies. The front cover must present the full title with all
+ words of the title equally prominent and visible. You may add
+ other material on the covers in addition. Copying with changes
+ limited to the covers, as long as they preserve the title of the
+ <link linkend="fdl-document">Document</link> and satisfy these
+ conditions, can be treated as verbatim copying in other
+ respects.
+ </para>
+
+ <para>
+ If the required texts for either cover are too voluminous to fit
+ legibly, you should put the first ones listed (as many as fit
+ reasonably) on the actual cover, and continue the rest onto
+ adjacent pages.
+ </para>
+
+ <para>
+ If you publish or distribute <link
+ linkend="fdl-transparent">Opaque</link> copies of the <link
+ linkend="fdl-document">Document</link> numbering more than 100,
+ you must either include a machine-readable <link
+ linkend="fdl-transparent">Transparent</link> copy along with
+ each Opaque copy, or state in or with each Opaque copy a
+ publicly-accessible computer-network location containing a
+ complete Transparent copy of the Document, free of added
+ material, which the general network-using public has access to
+ download anonymously at no charge using public-standard network
+ protocols. If you use the latter option, you must take
+ reasonably prudent steps, when you begin distribution of Opaque
+ copies in quantity, to ensure that this Transparent copy will
+ remain thus accessible at the stated location until at least one
+ year after the last time you distribute an Opaque copy (directly
+ or through your agents or retailers) of that edition to the
+ public.
+ </para>
+
+ <para>
+ It is requested, but not required, that you contact the authors
+ of the <link linkend="fdl-document">Document</link> well before
+ redistributing any large number of copies, to give them a chance
+ to provide you with an updated version of the Document.
+ </para>
+ </sect1>
+
+ <sect1 id="fdl-section4">
+ <title>4. MODIFICATIONS</title>
+ <para>
+ You may copy and distribute a <link
+ linkend="fdl-modified">Modified Version</link> of the <link
+ linkend="fdl-document">Document</link> under the conditions of
+ sections <link linkend="fdl-section2">2</link> and <link
+ linkend="fdl-section3">3</link> above, provided that you release
+ the Modified Version under precisely this License, with the
+ Modified Version filling the role of the Document, thus
+ licensing distribution and modification of the Modified Version
+ to whoever possesses a copy of it. In addition, you must do
+ these things in the Modified Version:
+ </para>
+
+ <itemizedlist mark="opencircle">
+ <listitem>
+ <formalpara>
+ <title>A</title>
+ <para>
+ Use in the <link linkend="fdl-title-page">Title
+ Page</link> (and on the covers, if any) a title distinct
+ from that of the <link
+ linkend="fdl-document">Document</link>, and from those of
+ previous versions (which should, if there were any, be
+ listed in the History section of the Document). You may
+ use the same title as a previous version if the original
+ publisher of that version gives permission.
+ </para>
+ </formalpara>
+ </listitem>
+
+ <listitem>
+ <formalpara>
+ <title>B</title>
+ <para>
+ List on the <link linkend="fdl-title-page">Title
+ Page</link>, as authors, one or more persons or entities
+ responsible for authorship of the modifications in the
+ <link linkend="fdl-modified">Modified Version</link>,
+ together with at least five of the principal authors of
+ the <link linkend="fdl-document">Document</link> (all of
+ its principal authors, if it has less than five).
+ </para>
+ </formalpara>
+ </listitem>
+
+ <listitem>
+ <formalpara>
+ <title>C</title>
+ <para>
+ State on the <link linkend="fdl-title-page">Title
+ Page</link> the name of the publisher of the <link
+ linkend="fdl-modified">Modified Version</link>, as the
+ publisher.
+ </para>
+ </formalpara>
+ </listitem>
+
+ <listitem>
+ <formalpara>
+ <title>D</title>
+ <para>
+ Preserve all the copyright notices of the <link
+ linkend="fdl-document">Document</link>.
+ </para>
+ </formalpara>
+ </listitem>
+
+ <listitem>
+ <formalpara>
+ <title>E</title>
+ <para>
+ Add an appropriate copyright notice for your modifications
+ adjacent to the other copyright notices.
+ </para>
+ </formalpara>
+ </listitem>
+
+ <listitem>
+ <formalpara>
+ <title>F</title>
+ <para>
+ Include, immediately after the copyright notices, a
+ license notice giving the public permission to use the
+ <link linkend="fdl-modified">Modified Version</link> under
+ the terms of this License, in the form shown in the
+ Addendum below.
+ </para>
+ </formalpara>
+ </listitem>
+
+ <listitem>
+ <formalpara>
+ <title>G</title>
+ <para>
+ Preserve in that license notice the full lists of <link
+ linkend="fdl-invariant"> Invariant Sections</link> and
+ required <link linkend="fdl-cover-texts">Cover
+ Texts</link> given in the <link
+ linkend="fdl-document">Document's</link> license notice.
+ </para>
+ </formalpara>
+ </listitem>
+
+ <listitem>
+ <formalpara>
+ <title>H</title>
+ <para>
+ Include an unaltered copy of this License.
+ </para>
+ </formalpara>
+ </listitem>
+
+ <listitem>
+ <formalpara>
+ <title>I</title>
+ <para>
+ Preserve the section entitled <quote>History</quote>, and
+ its title, and add to it an item stating at least the
+ title, year, new authors, and publisher of the <link
+ linkend="fdl-modified">Modified Version </link>as given on
+ the <link linkend="fdl-title-page">Title Page</link>. If
+ there is no section entitled <quote>History</quote> in the
+ <link linkend="fdl-document">Document</link>, create one
+ stating the title, year, authors, and publisher of the
+ Document as given on its Title Page, then add an item
+ describing the Modified Version as stated in the previous
+ sentence.
+ </para>
+ </formalpara>
+ </listitem>
+
+ <listitem>
+ <formalpara>
+ <title>J</title>
+ <para>
+ Preserve the network location, if any, given in the <link
+ linkend="fdl-document">Document</link> for public access
+ to a <link linkend="fdl-transparent">Transparent</link>
+ copy of the Document, and likewise the network locations
+ given in the Document for previous versions it was based
+ on. These may be placed in the <quote>History</quote>
+ section. You may omit a network location for a work that
+ was published at least four years before the Document
+ itself, or if the original publisher of the version it
+ refers to gives permission.
+ </para>
+ </formalpara>
+ </listitem>
+
+ <listitem>
+ <formalpara>
+ <title>K</title>
+ <para>
+ In any section entitled <quote>Acknowledgements</quote> or
+ <quote>Dedications</quote>, preserve the section's title,
+ and preserve in the section all the substance and tone of
+ each of the contributor acknowledgements and/or
+ dedications given therein.
+ </para>
+ </formalpara>
+ </listitem>
+
+ <listitem>
+ <formalpara>
+ <title>L</title>
+ <para>
+ Preserve all the <link linkend="fdl-invariant">Invariant
+ Sections</link> of the <link
+ linkend="fdl-document">Document</link>, unaltered in their
+ text and in their titles. Section numbers or the
+ equivalent are not considered part of the section titles.
+ </para>
+ </formalpara>
+ </listitem>
+
+ <listitem>
+ <formalpara>
+ <title>M</title>
+ <para>
+ Delete any section entitled
+ <quote>Endorsements</quote>. Such a section may not be
+ included in the <link linkend="fdl-modified">Modified
+ Version</link>.
+ </para>
+ </formalpara>
+ </listitem>
+
+ <listitem>
+ <formalpara>
+ <title>N</title>
+ <para>
+ Do not retitle any existing section as
+ <quote>Endorsements</quote> or to conflict in title with
+ any <link linkend="fdl-invariant">Invariant
+ Section</link>.
+ </para>
+ </formalpara>
+ </listitem>
+ </itemizedlist>
+
+ <para>
+ If the <link linkend="fdl-modified">Modified Version</link>
+ includes new front-matter sections or appendices that qualify as
+ <link linkend="fdl-secondary">Secondary Sections</link> and
+ contain no material copied from the Document, you may at your
+ option designate some or all of these sections as invariant. To
+ do this, add their titles to the list of <link
+ linkend="fdl-invariant">Invariant Sections</link> in the
+ Modified Version's license notice. These titles must be
+ distinct from any other section titles.
+ </para>
+
+ <para>
+ You may add a section entitled <quote>Endorsements</quote>,
+ provided it contains nothing but endorsements of your <link
+ linkend="fdl-modified">Modified Version</link> by various
+ parties--for example, statements of peer review or that the text
+ has been approved by an organization as the authoritative
+ definition of a standard.
+ </para>
+
+ <para>
+ You may add a passage of up to five words as a <link
+ linkend="fdl-cover-texts">Front-Cover Text</link>, and a passage
+ of up to 25 words as a <link
+ linkend="fdl-cover-texts">Back-Cover Text</link>, to the end of
+ the list of <link linkend="fdl-cover-texts">Cover Texts</link>
+ in the <link linkend="fdl-modified">Modified Version</link>.
+ Only one passage of Front-Cover Text and one of Back-Cover Text
+ may be added by (or through arrangements made by) any one
+ entity. If the <link linkend="fdl-document">Document</link>
+ already includes a cover text for the same cover, previously
+ added by you or by arrangement made by the same entity you are
+ acting on behalf of, you may not add another; but you may
+ replace the old one, on explicit permission from the previous
+ publisher that added the old one.
+ </para>
+
+ <para>
+ The author(s) and publisher(s) of the <link
+ linkend="fdl-document">Document</link> do not by this License
+ give permission to use their names for publicity for or to
+ assert or imply endorsement of any <link
+ linkend="fdl-modified">Modified Version </link>.
+ </para>
+ </sect1>
+
+ <sect1 id="fdl-section5">
+ <title>5. COMBINING DOCUMENTS</title>
+ <para>
+ You may combine the <link linkend="fdl-document">Document</link>
+ with other documents released under this License, under the
+ terms defined in <link linkend="fdl-section4">section 4</link>
+ above for modified versions, provided that you include in the
+ combination all of the <link linkend="fdl-invariant">Invariant
+ Sections</link> of all of the original documents, unmodified,
+ and list them all as Invariant Sections of your combined work in
+ its license notice.
+ </para>
+
+ <para>
+ The combined work need only contain one copy of this License,
+ and multiple identical <link linkend="fdl-invariant">Invariant
+ Sections</link> may be replaced with a single copy. If there are
+ multiple Invariant Sections with the same name but different
+ contents, make the title of each such section unique by adding
+ at the end of it, in parentheses, the name of the original
+ author or publisher of that section if known, or else a unique
+ number. Make the same adjustment to the section titles in the
+ list of Invariant Sections in the license notice of the combined
+ work.
+ </para>
+
+ <para>
+ In the combination, you must combine any sections entitled
+ <quote>History</quote> in the various original documents,
+ forming one section entitled <quote>History</quote>; likewise
+ combine any sections entitled <quote>Acknowledgements</quote>,
+ and any sections entitled <quote>Dedications</quote>. You must
+ delete all sections entitled <quote>Endorsements.</quote>
+ </para>
+ </sect1>
+
+ <sect1 id="fdl-section6">
+ <title>6. COLLECTIONS OF DOCUMENTS</title>
+ <para>
+ You may make a collection consisting of the <link
+ linkend="fdl-document">Document</link> and other documents
+ released under this License, and replace the individual copies
+ of this License in the various documents with a single copy that
+ is included in the collection, provided that you follow the
+ rules of this License for verbatim copying of each of the
+ documents in all other respects.
+ </para>
+
+ <para>
+ You may extract a single document from such a collection, and
+ dispbibute it individually under this License, provided you
+ insert a copy of this License into the extracted document, and
+ follow this License in all other respects regarding verbatim
+ copying of that document.
+ </para>
+ </sect1>
+
+ <sect1 id="fdl-section7">
+ <title>7. AGGREGATION WITH INDEPENDENT WORKS</title>
+ <para>
+ A compilation of the <link
+ linkend="fdl-document">Document</link> or its derivatives with
+ other separate and independent documents or works, in or on a
+ volume of a storage or distribution medium, does not as a whole
+ count as a <link linkend="fdl-modified">Modified Version</link>
+ of the Document, provided no compilation copyright is claimed
+ for the compilation. Such a compilation is called an
+ <quote>aggregate</quote>, and this License does not apply to the
+ other self-contained works thus compiled with the Document , on
+ account of their being thus compiled, if they are not themselves
+ derivative works of the Document. If the <link
+ linkend="fdl-cover-texts">Cover Text</link> requirement of <link
+ linkend="fdl-section3">section 3</link> is applicable to these
+ copies of the Document, then if the Document is less than one
+ quarter of the entire aggregate, the Document's Cover Texts may
+ be placed on covers that surround only the Document within the
+ aggregate. Otherwise they must appear on covers around the whole
+ aggregate.
+ </para>
+ </sect1>
+
+ <sect1 id="fdl-section8">
+ <title>8. TRANSLATION</title>
+ <para>
+ Translation is considered a kind of modification, so you may
+ distribute translations of the <link
+ linkend="fdl-document">Document</link> under the terms of <link
+ linkend="fdl-section4">section 4</link>. Replacing <link
+ linkend="fdl-invariant"> Invariant Sections</link> with
+ translations requires special permission from their copyright
+ holders, but you may include translations of some or all
+ Invariant Sections in addition to the original versions of these
+ Invariant Sections. You may include a translation of this
+ License provided that you also include the original English
+ version of this License. In case of a disagreement between the
+ translation and the original English version of this License,
+ the original English version will prevail.
+ </para>
+ </sect1>
+
+ <sect1 id="fdl-section9">
+ <title>9. TERMINATION</title>
+ <para>
+ You may not copy, modify, sublicense, or distribute the <link
+ linkend="fdl-document">Document</link> except as expressly
+ provided for under this License. Any other attempt to copy,
+ modify, sublicense or distribute the Document is void, and will
+ automatically terminate your rights under this License. However,
+ parties who have received copies, or rights, from you under this
+ License will not have their licenses terminated so long as such
+ parties remain in full compliance.
+ </para>
+ </sect1>
+
+ <sect1 id="fdl-section10">
+ <title>10. FUTURE REVISIONS OF THIS LICENSE</title>
+ <para>
+ The <ulink type="http"
+ url="http://www.gnu.org/fsf/fsf.html">Free Software
+ Foundation</ulink> may publish new, revised versions of the GNU
+ Free Documentation License from time to time. Such new versions
+ will be similar in spirit to the present version, but may differ
+ in detail to address new problems or concerns. See <ulink
+ type="http"
+ url="http://www.gnu.org/copyleft">http://www.gnu.org/copyleft/</ulink>.
+ </para>
+
+ <para>
+ Each version of the License is given a distinguishing version
+ number. If the <link linkend="fdl-document">Document</link>
+ specifies that a particular numbered version of this License
+ <quote>or any later version</quote> applies to it, you have the
+ option of following the terms and conditions either of that
+ specified version or of any later version that has been
+ published (not as a draft) by the Free Software Foundation. If
+ the Document does not specify a version number of this License,
+ you may choose any version ever published (not as a draft) by
+ the Free Software Foundation.
+ </para>
+ </sect1>
+
+ <sect1 id="fdl-using">
+ <title>Addendum</title>
+ <para>
+ To use this License in a document you have written, include a copy of
+ the License in the document and put the following copyright and
+ license notices just after the title page:
+ </para>
+
+ <blockquote>
+ <para>
+ Copyright &copy; YEAR YOUR NAME.
+ </para>
+ <para>
+ Permission is granted to copy, distribute and/or modify this
+ document under the terms of the GNU Free Documentation
+ License, Version 1.1 or any later version published by the
+ Free Software Foundation; with the <link
+ linkend="fdl-invariant">Invariant Sections</link> being LIST
+ THEIR TITLES, with the <link
+ linkend="fdl-cover-texts">Front-Cover Texts</link> being LIST,
+ and with the <link linkend="fdl-cover-texts">Back-Cover
+ Texts</link> being LIST. A copy of the license is included in
+ the section entitled <quote>GNU Free Documentation
+ License</quote>.
+ </para>
+ </blockquote>
+
+ <para>
+ If you have no <link linkend="fdl-invariant">Invariant
+ Sections</link>, write <quote>with no Invariant Sections</quote>
+ instead of saying which ones are invariant. If you have no
+ <link linkend="fdl-cover-texts">Front-Cover Texts</link>, write
+ <quote>no Front-Cover Texts</quote> instead of
+ <quote>Front-Cover Texts being LIST</quote>; likewise for <link
+ linkend="fdl-cover-texts">Back-Cover Texts</link>.
+ </para>
+
+ <para>
+ If your document contains nontrivial examples of program code,
+ we recommend releasing these examples in parallel under your
+ choice of free software license, such as the <ulink type="http"
+ url="http://www.gnu.org/copyleft/gpl.html"> GNU General Public
+ License</ulink>, to permit their use in free software.
+ </para>
+ </sect1>
+</appendix>
+
+
+
+
+
+
diff --git a/Documentation/DocBook/media/v4l/func-close.xml b/Documentation/DocBook/media/v4l/func-close.xml
new file mode 100644
index 000000000..232920d2f
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/func-close.xml
@@ -0,0 +1,62 @@
+<refentry id="func-close">
+ <refmeta>
+ <refentrytitle>V4L2 close()</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>v4l2-close</refname>
+ <refpurpose>Close a V4L2 device</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcsynopsisinfo>#include &lt;unistd.h&gt;</funcsynopsisinfo>
+ <funcprototype>
+ <funcdef>int <function>close</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>Closes the device. Any I/O in progress is terminated and
+resources associated with the file descriptor are freed. However data
+format parameters, current input or output, control values or other
+properties remain unchanged.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>Return Value</title>
+
+ <para>The function returns <returnvalue>0</returnvalue> on
+success, <returnvalue>-1</returnvalue> on failure and the
+<varname>errno</varname> is set appropriately. Possible error
+codes:</para>
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EBADF</errorcode></term>
+ <listitem>
+ <para><parameter>fd</parameter> is not a valid open file
+descriptor.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/func-ioctl.xml b/Documentation/DocBook/media/v4l/func-ioctl.xml
new file mode 100644
index 000000000..4394184a1
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/func-ioctl.xml
@@ -0,0 +1,71 @@
+<refentry id="func-ioctl">
+ <refmeta>
+ <refentrytitle>V4L2 ioctl()</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>v4l2-ioctl</refname>
+ <refpurpose>Program a V4L2 device</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcsynopsisinfo>#include &lt;sys/ioctl.h&gt;</funcsynopsisinfo>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>void *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>V4L2 ioctl request code as defined in the <filename>videodev2.h</filename> header file, for example
+VIDIOC_QUERYCAP.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para>Pointer to a function parameter, usually a structure.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>The <function>ioctl()</function> function is used to program
+V4L2 devices. The argument <parameter>fd</parameter> must be an open
+file descriptor. An ioctl <parameter>request</parameter> has encoded
+in it whether the argument is an input, output or read/write
+parameter, and the size of the argument <parameter>argp</parameter> in
+bytes. Macros and defines specifying V4L2 ioctl requests are located
+in the <filename>videodev2.h</filename> header file.
+Applications should use their own copy, not include the version in the
+kernel sources on the system they compile on. All V4L2 ioctl requests,
+their respective function and parameters are specified in <xref
+ linkend="user-func" />.</para>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+ <para>When an ioctl that takes an output or read/write parameter fails,
+ the parameter remains unmodified.</para>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/func-mmap.xml b/Documentation/DocBook/media/v4l/func-mmap.xml
new file mode 100644
index 000000000..f31ad71bf
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/func-mmap.xml
@@ -0,0 +1,183 @@
+<refentry id="func-mmap">
+ <refmeta>
+ <refentrytitle>V4L2 mmap()</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>v4l2-mmap</refname>
+ <refpurpose>Map device memory into application address space</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcsynopsisinfo>
+#include &lt;unistd.h&gt;
+#include &lt;sys/mman.h&gt;</funcsynopsisinfo>
+ <funcprototype>
+ <funcdef>void *<function>mmap</function></funcdef>
+ <paramdef>void *<parameter>start</parameter></paramdef>
+ <paramdef>size_t <parameter>length</parameter></paramdef>
+ <paramdef>int <parameter>prot</parameter></paramdef>
+ <paramdef>int <parameter>flags</parameter></paramdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>off_t <parameter>offset</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+ <variablelist>
+ <varlistentry>
+ <term><parameter>start</parameter></term>
+ <listitem>
+ <para>Map the buffer to this address in the
+application's address space. When the <constant>MAP_FIXED</constant>
+flag is specified, <parameter>start</parameter> must be a multiple of the
+pagesize and mmap will fail when the specified address
+cannot be used. Use of this option is discouraged; applications should
+just specify a <constant>NULL</constant> pointer here.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>length</parameter></term>
+ <listitem>
+ <para>Length of the memory area to map. This must be the
+same value as returned by the driver in the &v4l2-buffer;
+<structfield>length</structfield> field for the
+single-planar API, and the same value as returned by the driver
+in the &v4l2-plane; <structfield>length</structfield> field for the
+multi-planar API.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>prot</parameter></term>
+ <listitem>
+ <para>The <parameter>prot</parameter> argument describes the
+desired memory protection. Regardless of the device type and the
+direction of data exchange it should be set to
+<constant>PROT_READ</constant> | <constant>PROT_WRITE</constant>,
+permitting read and write access to image buffers. Drivers should
+support at least this combination of flags. Note the Linux
+<filename>video-buf</filename> kernel module, which is used by the
+bttv, saa7134, saa7146, cx88 and vivi driver supports only
+<constant>PROT_READ</constant> | <constant>PROT_WRITE</constant>. When
+the driver does not support the desired protection the
+<function>mmap()</function> function fails.</para>
+ <para>Note device memory accesses (&eg; the memory on a
+graphics card with video capturing hardware) may incur a performance
+penalty compared to main memory accesses, or reads may be
+significantly slower than writes or vice versa. Other I/O methods may
+be more efficient in this case.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>flags</parameter></term>
+ <listitem>
+ <para>The <parameter>flags</parameter> parameter
+specifies the type of the mapped object, mapping options and whether
+modifications made to the mapped copy of the page are private to the
+process or are to be shared with other references.</para>
+ <para><constant>MAP_FIXED</constant> requests that the
+driver selects no other address than the one specified. If the
+specified address cannot be used, <function>mmap()</function> will fail. If
+<constant>MAP_FIXED</constant> is specified,
+<parameter>start</parameter> must be a multiple of the pagesize. Use
+of this option is discouraged.</para>
+ <para>One of the <constant>MAP_SHARED</constant> or
+<constant>MAP_PRIVATE</constant> flags must be set.
+<constant>MAP_SHARED</constant> allows applications to share the
+mapped memory with other (&eg; child-) processes. Note the Linux
+<filename>video-buf</filename> module which is used by the bttv,
+saa7134, saa7146, cx88 and vivi driver supports only
+<constant>MAP_SHARED</constant>. <constant>MAP_PRIVATE</constant>
+requests copy-on-write semantics. V4L2 applications should not set the
+<constant>MAP_PRIVATE</constant>, <constant>MAP_DENYWRITE</constant>,
+<constant>MAP_EXECUTABLE</constant> or <constant>MAP_ANON</constant>
+flag.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>offset</parameter></term>
+ <listitem>
+ <para>Offset of the buffer in device memory. This must be the
+same value as returned by the driver in the &v4l2-buffer;
+<structfield>m</structfield> union <structfield>offset</structfield> field for
+the single-planar API, and the same value as returned by the driver
+in the &v4l2-plane; <structfield>m</structfield> union
+<structfield>mem_offset</structfield> field for the multi-planar API.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>The <function>mmap()</function> function asks to map
+<parameter>length</parameter> bytes starting at
+<parameter>offset</parameter> in the memory of the device specified by
+<parameter>fd</parameter> into the application address space,
+preferably at address <parameter>start</parameter>. This latter
+address is a hint only, and is usually specified as 0.</para>
+
+ <para>Suitable length and offset parameters are queried with the
+&VIDIOC-QUERYBUF; ioctl. Buffers must be allocated with the
+&VIDIOC-REQBUFS; ioctl before they can be queried.</para>
+
+ <para>To unmap buffers the &func-munmap; function is used.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>Return Value</title>
+
+ <para>On success <function>mmap()</function> returns a pointer to
+the mapped buffer. On error <constant>MAP_FAILED</constant> (-1) is
+returned, and the <varname>errno</varname> variable is set
+appropriately. Possible error codes are:</para>
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EBADF</errorcode></term>
+ <listitem>
+ <para><parameter>fd</parameter> is not a valid file
+descriptor.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EACCES</errorcode></term>
+ <listitem>
+ <para><parameter>fd</parameter> is
+not open for reading and writing.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The <parameter>start</parameter> or
+<parameter>length</parameter> or <parameter>offset</parameter> are not
+suitable. (E.&nbsp;g. they are too large, or not aligned on a
+<constant>PAGESIZE</constant> boundary.)</para>
+ <para>The <parameter>flags</parameter> or
+<parameter>prot</parameter> value is not supported.</para>
+ <para>No buffers have been allocated with the
+&VIDIOC-REQBUFS; ioctl.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>ENOMEM</errorcode></term>
+ <listitem>
+ <para>Not enough physical or virtual memory was available to
+complete the request.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/func-munmap.xml b/Documentation/DocBook/media/v4l/func-munmap.xml
new file mode 100644
index 000000000..860d49ca5
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/func-munmap.xml
@@ -0,0 +1,76 @@
+<refentry id="func-munmap">
+ <refmeta>
+ <refentrytitle>V4L2 munmap()</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>v4l2-munmap</refname>
+ <refpurpose>Unmap device memory</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcsynopsisinfo>
+#include &lt;unistd.h&gt;
+#include &lt;sys/mman.h&gt;</funcsynopsisinfo>
+ <funcprototype>
+ <funcdef>int <function>munmap</function></funcdef>
+ <paramdef>void *<parameter>start</parameter></paramdef>
+ <paramdef>size_t <parameter>length</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+ <refsect1>
+ <title>Arguments</title>
+ <variablelist>
+ <varlistentry>
+ <term><parameter>start</parameter></term>
+ <listitem>
+ <para>Address of the mapped buffer as returned by the
+&func-mmap; function.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>length</parameter></term>
+ <listitem>
+ <para>Length of the mapped buffer. This must be the same
+value as given to <function>mmap()</function> and returned by the
+driver in the &v4l2-buffer; <structfield>length</structfield>
+field for the single-planar API and in the &v4l2-plane;
+<structfield>length</structfield> field for the multi-planar API.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>Unmaps a previously with the &func-mmap; function mapped
+buffer and frees it, if possible. <!-- ? This function (not freeing)
+has no impact on I/O in progress, specifically it does not imply
+&VIDIOC-STREAMOFF; to terminate I/O. Unmapped buffers can still be
+enqueued, dequeued or queried, they are just not accessible by the
+application.--></para>
+ </refsect1>
+
+ <refsect1>
+ <title>Return Value</title>
+
+ <para>On success <function>munmap()</function> returns 0, on
+failure -1 and the <varname>errno</varname> variable is set
+appropriately:</para>
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The <parameter>start</parameter> or
+<parameter>length</parameter> is incorrect, or no buffers have been
+mapped yet.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/func-open.xml b/Documentation/DocBook/media/v4l/func-open.xml
new file mode 100644
index 000000000..cf64e207c
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/func-open.xml
@@ -0,0 +1,113 @@
+<refentry id="func-open">
+ <refmeta>
+ <refentrytitle>V4L2 open()</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>v4l2-open</refname>
+ <refpurpose>Open a V4L2 device</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcsynopsisinfo>#include &lt;fcntl.h&gt;</funcsynopsisinfo>
+ <funcprototype>
+ <funcdef>int <function>open</function></funcdef>
+ <paramdef>const char *<parameter>device_name</parameter></paramdef>
+ <paramdef>int <parameter>flags</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>device_name</parameter></term>
+ <listitem>
+ <para>Device to be opened.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>flags</parameter></term>
+ <listitem>
+ <para>Open flags. Access mode must be
+<constant>O_RDWR</constant>. This is just a technicality, input devices
+still support only reading and output devices only writing.</para>
+ <para>When the <constant>O_NONBLOCK</constant> flag is
+given, the read() function and the &VIDIOC-DQBUF; ioctl will return
+the &EAGAIN; when no data is available or no buffer is in the driver
+outgoing queue, otherwise these functions block until data becomes
+available. All V4L2 drivers exchanging data with applications must
+support the <constant>O_NONBLOCK</constant> flag.</para>
+ <para>Other flags have no effect.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+ <refsect1>
+ <title>Description</title>
+
+ <para>To open a V4L2 device applications call
+<function>open()</function> with the desired device name. This
+function has no side effects; all data format parameters, current
+input or output, control values or other properties remain unchanged.
+At the first <function>open()</function> call after loading the driver
+they will be reset to default values, drivers are never in an
+undefined state.</para>
+ </refsect1>
+ <refsect1>
+ <title>Return Value</title>
+
+ <para>On success <function>open</function> returns the new file
+descriptor. On error -1 is returned, and the <varname>errno</varname>
+variable is set appropriately. Possible error codes are:</para>
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EACCES</errorcode></term>
+ <listitem>
+ <para>The caller has no permission to access the
+device.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EBUSY</errorcode></term>
+ <listitem>
+ <para>The driver does not support multiple opens and the
+device is already in use.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>ENXIO</errorcode></term>
+ <listitem>
+ <para>No device corresponding to this device special file
+exists.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>ENOMEM</errorcode></term>
+ <listitem>
+ <para>Not enough kernel memory was available to complete the
+request.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EMFILE</errorcode></term>
+ <listitem>
+ <para>The process already has the maximum number of
+files open.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>ENFILE</errorcode></term>
+ <listitem>
+ <para>The limit on the total number of files open on the
+system has been reached.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/func-poll.xml b/Documentation/DocBook/media/v4l/func-poll.xml
new file mode 100644
index 000000000..4c73f1152
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/func-poll.xml
@@ -0,0 +1,142 @@
+<refentry id="func-poll">
+ <refmeta>
+ <refentrytitle>V4L2 poll()</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>v4l2-poll</refname>
+ <refpurpose>Wait for some event on a file descriptor</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcsynopsisinfo>#include &lt;sys/poll.h&gt;</funcsynopsisinfo>
+ <funcprototype>
+ <funcdef>int <function>poll</function></funcdef>
+ <paramdef>struct pollfd *<parameter>ufds</parameter></paramdef>
+ <paramdef>unsigned int <parameter>nfds</parameter></paramdef>
+ <paramdef>int <parameter>timeout</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>With the <function>poll()</function> function applications
+can suspend execution until the driver has captured data or is ready
+to accept data for output.</para>
+
+ <para>When streaming I/O has been negotiated this function waits
+until a buffer has been filled by the capture device and can be dequeued
+with the &VIDIOC-DQBUF; ioctl. For output devices this function waits
+until the device is ready to accept a new buffer to be queued up with
+the &VIDIOC-QBUF; ioctl for display. When buffers are already in the outgoing
+queue of the driver (capture) or the incoming queue isn't full (display)
+the function returns immediately.</para>
+
+ <para>On success <function>poll()</function> returns the number of
+file descriptors that have been selected (that is, file descriptors
+for which the <structfield>revents</structfield> field of the
+respective <structname>pollfd</structname> structure is non-zero).
+Capture devices set the <constant>POLLIN</constant> and
+<constant>POLLRDNORM</constant> flags in the
+<structfield>revents</structfield> field, output devices the
+<constant>POLLOUT</constant> and <constant>POLLWRNORM</constant>
+flags. When the function timed out it returns a value of zero, on
+failure it returns <returnvalue>-1</returnvalue> and the
+<varname>errno</varname> variable is set appropriately. When the
+application did not call &VIDIOC-STREAMON; the
+<function>poll()</function> function succeeds, but sets the
+<constant>POLLERR</constant> flag in the
+<structfield>revents</structfield> field. When the
+application has called &VIDIOC-STREAMON; for a capture device but hasn't
+yet called &VIDIOC-QBUF;, the <function>poll()</function> function
+succeeds and sets the <constant>POLLERR</constant> flag in the
+<structfield>revents</structfield> field. For output devices this
+same situation will cause <function>poll()</function> to succeed
+as well, but it sets the <constant>POLLOUT</constant> and
+<constant>POLLWRNORM</constant> flags in the <structfield>revents</structfield>
+field.</para>
+
+ <para>If an event occurred (see &VIDIOC-DQEVENT;) then
+<constant>POLLPRI</constant> will be set in the <structfield>revents</structfield>
+field and <function>poll()</function> will return.</para>
+
+ <para>When use of the <function>read()</function> function has
+been negotiated and the driver does not capture yet, the
+<function>poll</function> function starts capturing. When that fails
+it returns a <constant>POLLERR</constant> as above. Otherwise it waits
+until data has been captured and can be read. When the driver captures
+continuously (as opposed to, for example, still images) the function
+may return immediately.</para>
+
+ <para>When use of the <function>write()</function> function has
+been negotiated and the driver does not stream yet, the
+<function>poll</function> function starts streaming. When that fails
+it returns a <constant>POLLERR</constant> as above. Otherwise it waits
+until the driver is ready for a non-blocking
+<function>write()</function> call.</para>
+
+ <para>If the caller is only interested in events (just
+<constant>POLLPRI</constant> is set in the <structfield>events</structfield>
+field), then <function>poll()</function> will <emphasis>not</emphasis>
+start streaming if the driver does not stream yet. This makes it
+possible to just poll for events and not for buffers.</para>
+
+ <para>All drivers implementing the <function>read()</function> or
+<function>write()</function> function or streaming I/O must also
+support the <function>poll()</function> function.</para>
+
+ <para>For more details see the
+<function>poll()</function> manual page.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>Return Value</title>
+
+ <para>On success, <function>poll()</function> returns the number
+structures which have non-zero <structfield>revents</structfield>
+fields, or zero if the call timed out. On error
+<returnvalue>-1</returnvalue> is returned, and the
+<varname>errno</varname> variable is set appropriately:</para>
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EBADF</errorcode></term>
+ <listitem>
+ <para>One or more of the <parameter>ufds</parameter> members
+specify an invalid file descriptor.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EBUSY</errorcode></term>
+ <listitem>
+ <para>The driver does not support multiple read or write
+streams and the device is already in use.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EFAULT</errorcode></term>
+ <listitem>
+ <para><parameter>ufds</parameter> references an inaccessible
+memory area.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EINTR</errorcode></term>
+ <listitem>
+ <para>The call was interrupted by a signal.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The <parameter>nfds</parameter> argument is greater
+than <constant>OPEN_MAX</constant>.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/func-read.xml b/Documentation/DocBook/media/v4l/func-read.xml
new file mode 100644
index 000000000..e218bbfbd
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/func-read.xml
@@ -0,0 +1,181 @@
+<refentry id="func-read">
+ <refmeta>
+ <refentrytitle>V4L2 read()</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>v4l2-read</refname>
+ <refpurpose>Read from a V4L2 device</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcsynopsisinfo>#include &lt;unistd.h&gt;</funcsynopsisinfo>
+ <funcprototype>
+ <funcdef>ssize_t <function>read</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>void *<parameter>buf</parameter></paramdef>
+ <paramdef>size_t <parameter>count</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>buf</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>count</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para><function>read()</function> attempts to read up to
+<parameter>count</parameter> bytes from file descriptor
+<parameter>fd</parameter> into the buffer starting at
+<parameter>buf</parameter>. The layout of the data in the buffer is
+discussed in the respective device interface section, see ##. If <parameter>count</parameter> is zero,
+<function>read()</function> returns zero and has no other results. If
+<parameter>count</parameter> is greater than
+<constant>SSIZE_MAX</constant>, the result is unspecified. Regardless
+of the <parameter>count</parameter> value each
+<function>read()</function> call will provide at most one frame (two
+fields) worth of data.</para>
+
+ <para>By default <function>read()</function> blocks until data
+becomes available. When the <constant>O_NONBLOCK</constant> flag was
+given to the &func-open; function it
+returns immediately with an &EAGAIN; when no data is available. The
+&func-select; or &func-poll; functions
+can always be used to suspend execution until data becomes available. All
+drivers supporting the <function>read()</function> function must also
+support <function>select()</function> and
+<function>poll()</function>.</para>
+
+ <para>Drivers can implement read functionality in different
+ways, using a single or multiple buffers and discarding the oldest or
+newest frames once the internal buffers are filled.</para>
+
+ <para><function>read()</function> never returns a "snapshot" of a
+buffer being filled. Using a single buffer the driver will stop
+capturing when the application starts reading the buffer until the
+read is finished. Thus only the period of the vertical blanking
+interval is available for reading, or the capture rate must fall below
+the nominal frame rate of the video standard.</para>
+
+<para>The behavior of
+<function>read()</function> when called during the active picture
+period or the vertical blanking separating the top and bottom field
+depends on the discarding policy. A driver discarding the oldest
+frames keeps capturing into an internal buffer, continuously
+overwriting the previously, not read frame, and returns the frame
+being received at the time of the <function>read()</function> call as
+soon as it is complete.</para>
+
+ <para>A driver discarding the newest frames stops capturing until
+the next <function>read()</function> call. The frame being received at
+<function>read()</function> time is discarded, returning the following
+frame instead. Again this implies a reduction of the capture rate to
+one half or less of the nominal frame rate. An example of this model
+is the video read mode of the bttv driver, initiating a DMA to user
+memory when <function>read()</function> is called and returning when
+the DMA finished.</para>
+
+ <para>In the multiple buffer model drivers maintain a ring of
+internal buffers, automatically advancing to the next free buffer.
+This allows continuous capturing when the application can empty the
+buffers fast enough. Again, the behavior when the driver runs out of
+free buffers depends on the discarding policy.</para>
+
+ <para>Applications can get and set the number of buffers used
+internally by the driver with the &VIDIOC-G-PARM; and &VIDIOC-S-PARM;
+ioctls. They are optional, however. The discarding policy is not
+reported and cannot be changed. For minimum requirements see <xref
+ linkend="devices" />.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>Return Value</title>
+
+ <para>On success, the number of bytes read is returned. It is not
+an error if this number is smaller than the number of bytes requested,
+or the amount of data required for one frame. This may happen for
+example because <function>read()</function> was interrupted by a
+signal. On error, -1 is returned, and the <varname>errno</varname>
+variable is set appropriately. In this case the next read will start
+at the beginning of a new frame. Possible error codes are:</para>
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EAGAIN</errorcode></term>
+ <listitem>
+ <para>Non-blocking I/O has been selected using
+O_NONBLOCK and no data was immediately available for reading.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EBADF</errorcode></term>
+ <listitem>
+ <para><parameter>fd</parameter> is not a valid file
+descriptor or is not open for reading, or the process already has the
+maximum number of files open.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EBUSY</errorcode></term>
+ <listitem>
+ <para>The driver does not support multiple read streams and the
+device is already in use.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EFAULT</errorcode></term>
+ <listitem>
+ <para><parameter>buf</parameter> references an inaccessible
+memory area.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EINTR</errorcode></term>
+ <listitem>
+ <para>The call was interrupted by a signal before any
+data was read.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EIO</errorcode></term>
+ <listitem>
+ <para>I/O error. This indicates some hardware problem or a
+failure to communicate with a remote device (USB camera etc.).</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The <function>read()</function> function is not
+supported by this driver, not on this device, or generally not on this
+type of device.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/func-select.xml b/Documentation/DocBook/media/v4l/func-select.xml
new file mode 100644
index 000000000..e12a60d9b
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/func-select.xml
@@ -0,0 +1,130 @@
+<refentry id="func-select">
+ <refmeta>
+ <refentrytitle>V4L2 select()</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>v4l2-select</refname>
+ <refpurpose>Synchronous I/O multiplexing</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcsynopsisinfo>
+#include &lt;sys/time.h&gt;
+#include &lt;sys/types.h&gt;
+#include &lt;unistd.h&gt;</funcsynopsisinfo>
+ <funcprototype>
+ <funcdef>int <function>select</function></funcdef>
+ <paramdef>int <parameter>nfds</parameter></paramdef>
+ <paramdef>fd_set *<parameter>readfds</parameter></paramdef>
+ <paramdef>fd_set *<parameter>writefds</parameter></paramdef>
+ <paramdef>fd_set *<parameter>exceptfds</parameter></paramdef>
+ <paramdef>struct timeval *<parameter>timeout</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>With the <function>select()</function> function applications
+can suspend execution until the driver has captured data or is ready
+to accept data for output.</para>
+
+ <para>When streaming I/O has been negotiated this function waits
+until a buffer has been filled or displayed and can be dequeued with
+the &VIDIOC-DQBUF; ioctl. When buffers are already in the outgoing
+queue of the driver the function returns immediately.</para>
+
+ <para>On success <function>select()</function> returns the total
+number of bits set in the <structname>fd_set</structname>s. When the
+function timed out it returns a value of zero. On failure it returns
+<returnvalue>-1</returnvalue> and the <varname>errno</varname>
+variable is set appropriately. When the application did not call
+&VIDIOC-QBUF; or &VIDIOC-STREAMON; yet the
+<function>select()</function> function succeeds, setting the bit of
+the file descriptor in <parameter>readfds</parameter> or
+<parameter>writefds</parameter>, but subsequent &VIDIOC-DQBUF; calls
+will fail.<footnote><para>The Linux kernel implements
+<function>select()</function> like the &func-poll; function, but
+<function>select()</function> cannot return a
+<constant>POLLERR</constant>.</para>
+ </footnote></para>
+
+ <para>When use of the <function>read()</function> function has
+been negotiated and the driver does not capture yet, the
+<function>select()</function> function starts capturing. When that
+fails, <function>select()</function> returns successful and a
+subsequent <function>read()</function> call, which also attempts to
+start capturing, will return an appropriate error code. When the
+driver captures continuously (as opposed to, for example, still
+images) and data is already available the
+<function>select()</function> function returns immediately.</para>
+
+ <para>When use of the <function>write()</function> function has
+been negotiated the <function>select()</function> function just waits
+until the driver is ready for a non-blocking
+<function>write()</function> call.</para>
+
+ <para>All drivers implementing the <function>read()</function> or
+<function>write()</function> function or streaming I/O must also
+support the <function>select()</function> function.</para>
+
+ <para>For more details see the <function>select()</function>
+manual page.</para>
+
+ </refsect1>
+
+ <refsect1>
+ <title>Return Value</title>
+
+ <para>On success, <function>select()</function> returns the number
+of descriptors contained in the three returned descriptor sets, which
+will be zero if the timeout expired. On error
+<returnvalue>-1</returnvalue> is returned, and the
+<varname>errno</varname> variable is set appropriately; the sets and
+<parameter>timeout</parameter> are undefined. Possible error codes
+are:</para>
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EBADF</errorcode></term>
+ <listitem>
+ <para>One or more of the file descriptor sets specified a
+file descriptor that is not open.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EBUSY</errorcode></term>
+ <listitem>
+ <para>The driver does not support multiple read or write
+streams and the device is already in use.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EFAULT</errorcode></term>
+ <listitem>
+ <para>The <parameter>readfds</parameter>,
+<parameter>writefds</parameter>, <parameter>exceptfds</parameter> or
+<parameter>timeout</parameter> pointer references an inaccessible memory
+area.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EINTR</errorcode></term>
+ <listitem>
+ <para>The call was interrupted by a signal.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The <parameter>nfds</parameter> argument is less than
+zero or greater than <constant>FD_SETSIZE</constant>.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/func-write.xml b/Documentation/DocBook/media/v4l/func-write.xml
new file mode 100644
index 000000000..575207885
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/func-write.xml
@@ -0,0 +1,128 @@
+<refentry id="func-write">
+ <refmeta>
+ <refentrytitle>V4L2 write()</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>v4l2-write</refname>
+ <refpurpose>Write to a V4L2 device</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcsynopsisinfo>#include &lt;unistd.h&gt;</funcsynopsisinfo>
+ <funcprototype>
+ <funcdef>ssize_t <function>write</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>void *<parameter>buf</parameter></paramdef>
+ <paramdef>size_t <parameter>count</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>buf</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>count</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para><function>write()</function> writes up to
+<parameter>count</parameter> bytes to the device referenced by the
+file descriptor <parameter>fd</parameter> from the buffer starting at
+<parameter>buf</parameter>. When the hardware outputs are not active
+yet, this function enables them. When <parameter>count</parameter> is
+zero, <function>write()</function> returns
+<returnvalue>0</returnvalue> without any other effect.</para>
+
+ <para>When the application does not provide more data in time, the
+previous video frame, raw VBI image, sliced VPS or WSS data is
+displayed again. Sliced Teletext or Closed Caption data is not
+repeated, the driver inserts a blank line instead.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>Return Value</title>
+
+ <para>On success, the number of bytes written are returned. Zero
+indicates nothing was written. On error, <returnvalue>-1</returnvalue>
+is returned, and the <varname>errno</varname> variable is set
+appropriately. In this case the next write will start at the beginning
+of a new frame. Possible error codes are:</para>
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EAGAIN</errorcode></term>
+ <listitem>
+ <para>Non-blocking I/O has been selected using the <link
+linkend="func-open"><constant>O_NONBLOCK</constant></link> flag and no
+buffer space was available to write the data immediately.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EBADF</errorcode></term>
+ <listitem>
+ <para><parameter>fd</parameter> is not a valid file
+descriptor or is not open for writing.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EBUSY</errorcode></term>
+ <listitem>
+ <para>The driver does not support multiple write streams and the
+device is already in use.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EFAULT</errorcode></term>
+ <listitem>
+ <para><parameter>buf</parameter> references an inaccessible
+memory area.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EINTR</errorcode></term>
+ <listitem>
+ <para>The call was interrupted by a signal before any
+data was written.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EIO</errorcode></term>
+ <listitem>
+ <para>I/O error. This indicates some hardware problem.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The <function>write()</function> function is not
+supported by this driver, not on this device, or generally not on this
+type of device.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/gen-errors.xml b/Documentation/DocBook/media/v4l/gen-errors.xml
new file mode 100644
index 000000000..7e29a4e1f
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/gen-errors.xml
@@ -0,0 +1,77 @@
+<title>Generic Error Codes</title>
+
+<table frame="none" pgwide="1" id="gen-errors">
+ <title>Generic error codes</title>
+ <tgroup cols="2">
+ &cs-str;
+ <tbody valign="top">
+ <!-- Keep it ordered alphabetically -->
+ <row>
+ <entry>EAGAIN (aka EWOULDBLOCK)</entry>
+ <entry>The ioctl can't be handled because the device is in state where
+ it can't perform it. This could happen for example in case where
+ device is sleeping and ioctl is performed to query statistics.
+ It is also returned when the ioctl would need to wait
+ for an event, but the device was opened in non-blocking mode.
+ </entry>
+ </row>
+ <row>
+ <entry>EBADF</entry>
+ <entry>The file descriptor is not a valid.</entry>
+ </row>
+ <row>
+ <entry>EBUSY</entry>
+ <entry>The ioctl can't be handled because the device is busy. This is
+ typically return while device is streaming, and an ioctl tried to
+ change something that would affect the stream, or would require the
+ usage of a hardware resource that was already allocated. The ioctl
+ must not be retried without performing another action to fix the
+ problem first (typically: stop the stream before retrying).</entry>
+ </row>
+ <row>
+ <entry>EFAULT</entry>
+ <entry>There was a failure while copying data from/to userspace,
+ probably caused by an invalid pointer reference.</entry>
+ </row>
+ <row>
+ <entry>EINVAL</entry>
+ <entry>One or more of the ioctl parameters are invalid or out of the
+ allowed range. This is a widely used error code. See the individual
+ ioctl requests for specific causes.</entry>
+ </row>
+ <row>
+ <entry>ENODEV</entry>
+ <entry>Device not found or was removed.</entry>
+ </row>
+ <row>
+ <entry>ENOMEM</entry>
+ <entry>There's not enough memory to handle the desired operation.</entry>
+ </row>
+ <row>
+ <entry>ENOTTY</entry>
+ <entry>The ioctl is not supported by the driver, actually meaning that
+ the required functionality is not available, or the file
+ descriptor is not for a media device.</entry>
+ </row>
+ <row>
+ <entry>ENOSPC</entry>
+ <entry>On USB devices, the stream ioctl's can return this error, meaning
+ that this request would overcommit the usb bandwidth reserved
+ for periodic transfers (up to 80% of the USB bandwidth).</entry>
+ </row>
+ <row>
+ <entry>EPERM</entry>
+ <entry>Permission denied. Can be returned if the device needs write
+ permission, or some special capabilities is needed
+ (e. g. root)</entry>
+ </row>
+ </tbody>
+ </tgroup>
+</table>
+
+<para>Note 1: ioctls may return other error codes. Since errors may have side
+effects such as a driver reset, applications should abort on unexpected errors.
+</para>
+
+<para>Note 2: Request-specific error codes are listed in the individual
+requests descriptions.</para>
diff --git a/Documentation/DocBook/media/v4l/io.xml b/Documentation/DocBook/media/v4l/io.xml
new file mode 100644
index 000000000..1c17f802b
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/io.xml
@@ -0,0 +1,1533 @@
+ <title>Input/Output</title>
+
+ <para>The V4L2 API defines several different methods to read from or
+write to a device. All drivers exchanging data with applications must
+support at least one of them.</para>
+
+ <para>The classic I/O method using the <function>read()</function>
+and <function>write()</function> function is automatically selected
+after opening a V4L2 device. When the driver does not support this
+method attempts to read or write will fail at any time.</para>
+
+ <para>Other methods must be negotiated. To select the streaming I/O
+method with memory mapped or user buffers applications call the
+&VIDIOC-REQBUFS; ioctl. The asynchronous I/O method is not defined
+yet.</para>
+
+ <para>Video overlay can be considered another I/O method, although
+the application does not directly receive the image data. It is
+selected by initiating video overlay with the &VIDIOC-S-FMT; ioctl.
+For more information see <xref linkend="overlay" />.</para>
+
+ <para>Generally exactly one I/O method, including overlay, is
+associated with each file descriptor. The only exceptions are
+applications not exchanging data with a driver ("panel applications",
+see <xref linkend="open" />) and drivers permitting simultaneous video capturing
+and overlay using the same file descriptor, for compatibility with V4L
+and earlier versions of V4L2.</para>
+
+ <para><constant>VIDIOC_S_FMT</constant> and
+<constant>VIDIOC_REQBUFS</constant> would permit this to some degree,
+but for simplicity drivers need not support switching the I/O method
+(after first switching away from read/write) other than by closing
+and reopening the device.</para>
+
+ <para>The following sections describe the various I/O methods in
+more detail.</para>
+
+ <section id="rw">
+ <title>Read/Write</title>
+
+ <para>Input and output devices support the
+<function>read()</function> and <function>write()</function> function,
+respectively, when the <constant>V4L2_CAP_READWRITE</constant> flag in
+the <structfield>capabilities</structfield> field of &v4l2-capability;
+returned by the &VIDIOC-QUERYCAP; ioctl is set.</para>
+
+ <para>Drivers may need the CPU to copy the data, but they may also
+support DMA to or from user memory, so this I/O method is not
+necessarily less efficient than other methods merely exchanging buffer
+pointers. It is considered inferior though because no meta-information
+like frame counters or timestamps are passed. This information is
+necessary to recognize frame dropping and to synchronize with other
+data streams. However this is also the simplest I/O method, requiring
+little or no setup to exchange data. It permits command line stunts
+like this (the <application>vidctrl</application> tool is
+fictitious):</para>
+
+ <informalexample>
+ <screen>
+&gt; vidctrl /dev/video --input=0 --format=YUYV --size=352x288
+&gt; dd if=/dev/video of=myimage.422 bs=202752 count=1
+</screen>
+ </informalexample>
+
+ <para>To read from the device applications use the
+&func-read; function, to write the &func-write; function.
+Drivers must implement one I/O method if they
+exchange data with applications, but it need not be this.<footnote>
+ <para>It would be desirable if applications could depend on
+drivers supporting all I/O interfaces, but as much as the complex
+memory mapping I/O can be inadequate for some devices we have no
+reason to require this interface, which is most useful for simple
+applications capturing still images.</para>
+ </footnote> When reading or writing is supported, the driver
+must also support the &func-select; and &func-poll;
+function.<footnote>
+ <para>At the driver level <function>select()</function> and
+<function>poll()</function> are the same, and
+<function>select()</function> is too important to be optional.</para>
+ </footnote></para>
+ </section>
+
+ <section id="mmap">
+ <title>Streaming I/O (Memory Mapping)</title>
+
+ <para>Input and output devices support this I/O method when the
+<constant>V4L2_CAP_STREAMING</constant> flag in the
+<structfield>capabilities</structfield> field of &v4l2-capability;
+returned by the &VIDIOC-QUERYCAP; ioctl is set. There are two
+streaming methods, to determine if the memory mapping flavor is
+supported applications must call the &VIDIOC-REQBUFS; ioctl.</para>
+
+ <para>Streaming is an I/O method where only pointers to buffers
+are exchanged between application and driver, the data itself is not
+copied. Memory mapping is primarily intended to map buffers in device
+memory into the application's address space. Device memory can be for
+example the video memory on a graphics card with a video capture
+add-on. However, being the most efficient I/O method available for a
+long time, many other drivers support streaming as well, allocating
+buffers in DMA-able main memory.</para>
+
+ <para>A driver can support many sets of buffers. Each set is
+identified by a unique buffer type value. The sets are independent and
+each set can hold a different type of data. To access different sets
+at the same time different file descriptors must be used.<footnote>
+ <para>One could use one file descriptor and set the buffer
+type field accordingly when calling &VIDIOC-QBUF; etc., but it makes
+the <function>select()</function> function ambiguous. We also like the
+clean approach of one file descriptor per logical stream. Video
+overlay for example is also a logical stream, although the CPU is not
+needed for continuous operation.</para>
+ </footnote></para>
+
+ <para>To allocate device buffers applications call the
+&VIDIOC-REQBUFS; ioctl with the desired number of buffers and buffer
+type, for example <constant>V4L2_BUF_TYPE_VIDEO_CAPTURE</constant>.
+This ioctl can also be used to change the number of buffers or to free
+the allocated memory, provided none of the buffers are still
+mapped.</para>
+
+ <para>Before applications can access the buffers they must map
+them into their address space with the &func-mmap; function. The
+location of the buffers in device memory can be determined with the
+&VIDIOC-QUERYBUF; ioctl. In the single-planar API case, the
+<structfield>m.offset</structfield> and <structfield>length</structfield>
+returned in a &v4l2-buffer; are passed as sixth and second parameter to the
+<function>mmap()</function> function. When using the multi-planar API,
+&v4l2-buffer; contains an array of &v4l2-plane; structures, each
+containing its own <structfield>m.offset</structfield> and
+<structfield>length</structfield>. When using the multi-planar API, every
+plane of every buffer has to be mapped separately, so the number of
+calls to &func-mmap; should be equal to number of buffers times number of
+planes in each buffer. The offset and length values must not be modified.
+Remember, the buffers are allocated in physical memory, as opposed to virtual
+memory, which can be swapped out to disk. Applications should free the buffers
+as soon as possible with the &func-munmap; function.</para>
+
+ <example>
+ <title>Mapping buffers in the single-planar API</title>
+ <programlisting>
+&v4l2-requestbuffers; reqbuf;
+struct {
+ void *start;
+ size_t length;
+} *buffers;
+unsigned int i;
+
+memset(&amp;reqbuf, 0, sizeof(reqbuf));
+reqbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+reqbuf.memory = V4L2_MEMORY_MMAP;
+reqbuf.count = 20;
+
+if (-1 == ioctl (fd, &VIDIOC-REQBUFS;, &amp;reqbuf)) {
+ if (errno == EINVAL)
+ printf("Video capturing or mmap-streaming is not supported\n");
+ else
+ perror("VIDIOC_REQBUFS");
+
+ exit(EXIT_FAILURE);
+}
+
+/* We want at least five buffers. */
+
+if (reqbuf.count &lt; 5) {
+ /* You may need to free the buffers here. */
+ printf("Not enough buffer memory\n");
+ exit(EXIT_FAILURE);
+}
+
+buffers = calloc(reqbuf.count, sizeof(*buffers));
+assert(buffers != NULL);
+
+for (i = 0; i &lt; reqbuf.count; i++) {
+ &v4l2-buffer; buffer;
+
+ memset(&amp;buffer, 0, sizeof(buffer));
+ buffer.type = reqbuf.type;
+ buffer.memory = V4L2_MEMORY_MMAP;
+ buffer.index = i;
+
+ if (-1 == ioctl (fd, &VIDIOC-QUERYBUF;, &amp;buffer)) {
+ perror("VIDIOC_QUERYBUF");
+ exit(EXIT_FAILURE);
+ }
+
+ buffers[i].length = buffer.length; /* remember for munmap() */
+
+ buffers[i].start = mmap(NULL, buffer.length,
+ PROT_READ | PROT_WRITE, /* recommended */
+ MAP_SHARED, /* recommended */
+ fd, buffer.m.offset);
+
+ if (MAP_FAILED == buffers[i].start) {
+ /* If you do not exit here you should unmap() and free()
+ the buffers mapped so far. */
+ perror("mmap");
+ exit(EXIT_FAILURE);
+ }
+}
+
+/* Cleanup. */
+
+for (i = 0; i &lt; reqbuf.count; i++)
+ munmap(buffers[i].start, buffers[i].length);
+ </programlisting>
+ </example>
+
+ <example>
+ <title>Mapping buffers in the multi-planar API</title>
+ <programlisting>
+&v4l2-requestbuffers; reqbuf;
+/* Our current format uses 3 planes per buffer */
+#define FMT_NUM_PLANES = 3
+
+struct {
+ void *start[FMT_NUM_PLANES];
+ size_t length[FMT_NUM_PLANES];
+} *buffers;
+unsigned int i, j;
+
+memset(&amp;reqbuf, 0, sizeof(reqbuf));
+reqbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
+reqbuf.memory = V4L2_MEMORY_MMAP;
+reqbuf.count = 20;
+
+if (ioctl(fd, &VIDIOC-REQBUFS;, &amp;reqbuf) &lt; 0) {
+ if (errno == EINVAL)
+ printf("Video capturing or mmap-streaming is not supported\n");
+ else
+ perror("VIDIOC_REQBUFS");
+
+ exit(EXIT_FAILURE);
+}
+
+/* We want at least five buffers. */
+
+if (reqbuf.count &lt; 5) {
+ /* You may need to free the buffers here. */
+ printf("Not enough buffer memory\n");
+ exit(EXIT_FAILURE);
+}
+
+buffers = calloc(reqbuf.count, sizeof(*buffers));
+assert(buffers != NULL);
+
+for (i = 0; i &lt; reqbuf.count; i++) {
+ &v4l2-buffer; buffer;
+ &v4l2-plane; planes[FMT_NUM_PLANES];
+
+ memset(&amp;buffer, 0, sizeof(buffer));
+ buffer.type = reqbuf.type;
+ buffer.memory = V4L2_MEMORY_MMAP;
+ buffer.index = i;
+ /* length in struct v4l2_buffer in multi-planar API stores the size
+ * of planes array. */
+ buffer.length = FMT_NUM_PLANES;
+ buffer.m.planes = planes;
+
+ if (ioctl(fd, &VIDIOC-QUERYBUF;, &amp;buffer) &lt; 0) {
+ perror("VIDIOC_QUERYBUF");
+ exit(EXIT_FAILURE);
+ }
+
+ /* Every plane has to be mapped separately */
+ for (j = 0; j &lt; FMT_NUM_PLANES; j++) {
+ buffers[i].length[j] = buffer.m.planes[j].length; /* remember for munmap() */
+
+ buffers[i].start[j] = mmap(NULL, buffer.m.planes[j].length,
+ PROT_READ | PROT_WRITE, /* recommended */
+ MAP_SHARED, /* recommended */
+ fd, buffer.m.planes[j].m.offset);
+
+ if (MAP_FAILED == buffers[i].start[j]) {
+ /* If you do not exit here you should unmap() and free()
+ the buffers and planes mapped so far. */
+ perror("mmap");
+ exit(EXIT_FAILURE);
+ }
+ }
+}
+
+/* Cleanup. */
+
+for (i = 0; i &lt; reqbuf.count; i++)
+ for (j = 0; j &lt; FMT_NUM_PLANES; j++)
+ munmap(buffers[i].start[j], buffers[i].length[j]);
+ </programlisting>
+ </example>
+
+ <para>Conceptually streaming drivers maintain two buffer queues, an incoming
+and an outgoing queue. They separate the synchronous capture or output
+operation locked to a video clock from the application which is
+subject to random disk or network delays and preemption by
+other processes, thereby reducing the probability of data loss.
+The queues are organized as FIFOs, buffers will be
+output in the order enqueued in the incoming FIFO, and were
+captured in the order dequeued from the outgoing FIFO.</para>
+
+ <para>The driver may require a minimum number of buffers enqueued
+at all times to function, apart of this no limit exists on the number
+of buffers applications can enqueue in advance, or dequeue and
+process. They can also enqueue in a different order than buffers have
+been dequeued, and the driver can <emphasis>fill</emphasis> enqueued
+<emphasis>empty</emphasis> buffers in any order. <footnote>
+ <para>Random enqueue order permits applications processing
+images out of order (such as video codecs) to return buffers earlier,
+reducing the probability of data loss. Random fill order allows
+drivers to reuse buffers on a LIFO-basis, taking advantage of caches
+holding scatter-gather lists and the like.</para>
+ </footnote> The index number of a buffer (&v4l2-buffer;
+<structfield>index</structfield>) plays no role here, it only
+identifies the buffer.</para>
+
+ <para>Initially all mapped buffers are in dequeued state,
+inaccessible by the driver. For capturing applications it is customary
+to first enqueue all mapped buffers, then to start capturing and enter
+the read loop. Here the application waits until a filled buffer can be
+dequeued, and re-enqueues the buffer when the data is no longer
+needed. Output applications fill and enqueue buffers, when enough
+buffers are stacked up the output is started with
+<constant>VIDIOC_STREAMON</constant>. In the write loop, when
+the application runs out of free buffers, it must wait until an empty
+buffer can be dequeued and reused.</para>
+
+ <para>To enqueue and dequeue a buffer applications use the
+&VIDIOC-QBUF; and &VIDIOC-DQBUF; ioctl. The status of a buffer being
+mapped, enqueued, full or empty can be determined at any time using the
+&VIDIOC-QUERYBUF; ioctl. Two methods exist to suspend execution of the
+application until one or more buffers can be dequeued. By default
+<constant>VIDIOC_DQBUF</constant> blocks when no buffer is in the
+outgoing queue. When the <constant>O_NONBLOCK</constant> flag was
+given to the &func-open; function, <constant>VIDIOC_DQBUF</constant>
+returns immediately with an &EAGAIN; when no buffer is available. The
+&func-select; or &func-poll; functions are always available.</para>
+
+ <para>To start and stop capturing or output applications call the
+&VIDIOC-STREAMON; and &VIDIOC-STREAMOFF; ioctl. Note
+<constant>VIDIOC_STREAMOFF</constant> removes all buffers from both
+queues as a side effect. Since there is no notion of doing anything
+"now" on a multitasking system, if an application needs to synchronize
+with another event it should examine the &v4l2-buffer;
+<structfield>timestamp</structfield> of captured or outputted buffers.
+</para>
+
+ <para>Drivers implementing memory mapping I/O must
+support the <constant>VIDIOC_REQBUFS</constant>,
+<constant>VIDIOC_QUERYBUF</constant>,
+<constant>VIDIOC_QBUF</constant>, <constant>VIDIOC_DQBUF</constant>,
+<constant>VIDIOC_STREAMON</constant> and
+<constant>VIDIOC_STREAMOFF</constant> ioctl, the
+<function>mmap()</function>, <function>munmap()</function>,
+<function>select()</function> and <function>poll()</function>
+function.<footnote>
+ <para>At the driver level <function>select()</function> and
+<function>poll()</function> are the same, and
+<function>select()</function> is too important to be optional. The
+rest should be evident.</para>
+ </footnote></para>
+
+ <para>[capture example]</para>
+
+ </section>
+
+ <section id="userp">
+ <title>Streaming I/O (User Pointers)</title>
+
+ <para>Input and output devices support this I/O method when the
+<constant>V4L2_CAP_STREAMING</constant> flag in the
+<structfield>capabilities</structfield> field of &v4l2-capability;
+returned by the &VIDIOC-QUERYCAP; ioctl is set. If the particular user
+pointer method (not only memory mapping) is supported must be
+determined by calling the &VIDIOC-REQBUFS; ioctl.</para>
+
+ <para>This I/O method combines advantages of the read/write and
+memory mapping methods. Buffers (planes) are allocated by the application
+itself, and can reside for example in virtual or shared memory. Only
+pointers to data are exchanged, these pointers and meta-information
+are passed in &v4l2-buffer; (or in &v4l2-plane; in the multi-planar API case).
+The driver must be switched into user pointer I/O mode by calling the
+&VIDIOC-REQBUFS; with the desired buffer type. No buffers (planes) are allocated
+beforehand, consequently they are not indexed and cannot be queried like mapped
+buffers with the <constant>VIDIOC_QUERYBUF</constant> ioctl.</para>
+
+ <example>
+ <title>Initiating streaming I/O with user pointers</title>
+
+ <programlisting>
+&v4l2-requestbuffers; reqbuf;
+
+memset (&amp;reqbuf, 0, sizeof (reqbuf));
+reqbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+reqbuf.memory = V4L2_MEMORY_USERPTR;
+
+if (ioctl (fd, &VIDIOC-REQBUFS;, &amp;reqbuf) == -1) {
+ if (errno == EINVAL)
+ printf ("Video capturing or user pointer streaming is not supported\n");
+ else
+ perror ("VIDIOC_REQBUFS");
+
+ exit (EXIT_FAILURE);
+}
+ </programlisting>
+ </example>
+
+ <para>Buffer (plane) addresses and sizes are passed on the fly with the
+&VIDIOC-QBUF; ioctl. Although buffers are commonly cycled,
+applications can pass different addresses and sizes at each
+<constant>VIDIOC_QBUF</constant> call. If required by the hardware the
+driver swaps memory pages within physical memory to create a
+continuous area of memory. This happens transparently to the
+application in the virtual memory subsystem of the kernel. When buffer
+pages have been swapped out to disk they are brought back and finally
+locked in physical memory for DMA.<footnote>
+ <para>We expect that frequently used buffers are typically not
+swapped out. Anyway, the process of swapping, locking or generating
+scatter-gather lists may be time consuming. The delay can be masked by
+the depth of the incoming buffer queue, and perhaps by maintaining
+caches assuming a buffer will be soon enqueued again. On the other
+hand, to optimize memory usage drivers can limit the number of buffers
+locked in advance and recycle the most recently used buffers first. Of
+course, the pages of empty buffers in the incoming queue need not be
+saved to disk. Output buffers must be saved on the incoming and
+outgoing queue because an application may share them with other
+processes.</para>
+ </footnote></para>
+
+ <para>Filled or displayed buffers are dequeued with the
+&VIDIOC-DQBUF; ioctl. The driver can unlock the memory pages at any
+time between the completion of the DMA and this ioctl. The memory is
+also unlocked when &VIDIOC-STREAMOFF; is called, &VIDIOC-REQBUFS;, or
+when the device is closed. Applications must take care not to free
+buffers without dequeuing. For once, the buffers remain locked until
+further, wasting physical memory. Second the driver will not be
+notified when the memory is returned to the application's free list
+and subsequently reused for other purposes, possibly completing the
+requested DMA and overwriting valuable data.</para>
+
+ <para>For capturing applications it is customary to enqueue a
+number of empty buffers, to start capturing and enter the read loop.
+Here the application waits until a filled buffer can be dequeued, and
+re-enqueues the buffer when the data is no longer needed. Output
+applications fill and enqueue buffers, when enough buffers are stacked
+up output is started. In the write loop, when the application
+runs out of free buffers it must wait until an empty buffer can be
+dequeued and reused. Two methods exist to suspend execution of the
+application until one or more buffers can be dequeued. By default
+<constant>VIDIOC_DQBUF</constant> blocks when no buffer is in the
+outgoing queue. When the <constant>O_NONBLOCK</constant> flag was
+given to the &func-open; function, <constant>VIDIOC_DQBUF</constant>
+returns immediately with an &EAGAIN; when no buffer is available. The
+&func-select; or &func-poll; function are always available.</para>
+
+ <para>To start and stop capturing or output applications call the
+&VIDIOC-STREAMON; and &VIDIOC-STREAMOFF; ioctl. Note
+<constant>VIDIOC_STREAMOFF</constant> removes all buffers from both
+queues and unlocks all buffers as a side effect. Since there is no
+notion of doing anything "now" on a multitasking system, if an
+application needs to synchronize with another event it should examine
+the &v4l2-buffer; <structfield>timestamp</structfield> of captured
+or outputted buffers.</para>
+
+ <para>Drivers implementing user pointer I/O must
+support the <constant>VIDIOC_REQBUFS</constant>,
+<constant>VIDIOC_QBUF</constant>, <constant>VIDIOC_DQBUF</constant>,
+<constant>VIDIOC_STREAMON</constant> and
+<constant>VIDIOC_STREAMOFF</constant> ioctl, the
+<function>select()</function> and <function>poll()</function> function.<footnote>
+ <para>At the driver level <function>select()</function> and
+<function>poll()</function> are the same, and
+<function>select()</function> is too important to be optional. The
+rest should be evident.</para>
+ </footnote></para>
+ </section>
+
+ <section id="dmabuf">
+ <title>Streaming I/O (DMA buffer importing)</title>
+
+ <note>
+ <title>Experimental</title>
+ <para>This is an <link linkend="experimental">experimental</link>
+ interface and may change in the future.</para>
+ </note>
+
+<para>The DMABUF framework provides a generic method for sharing buffers
+between multiple devices. Device drivers that support DMABUF can export a DMA
+buffer to userspace as a file descriptor (known as the exporter role), import a
+DMA buffer from userspace using a file descriptor previously exported for a
+different or the same device (known as the importer role), or both. This
+section describes the DMABUF importer role API in V4L2.</para>
+
+ <para>Refer to <link linkend="vidioc-expbuf">DMABUF exporting</link> for
+details about exporting V4L2 buffers as DMABUF file descriptors.</para>
+
+<para>Input and output devices support the streaming I/O method when the
+<constant>V4L2_CAP_STREAMING</constant> flag in the
+<structfield>capabilities</structfield> field of &v4l2-capability; returned by
+the &VIDIOC-QUERYCAP; ioctl is set. Whether importing DMA buffers through
+DMABUF file descriptors is supported is determined by calling the
+&VIDIOC-REQBUFS; ioctl with the memory type set to
+<constant>V4L2_MEMORY_DMABUF</constant>.</para>
+
+ <para>This I/O method is dedicated to sharing DMA buffers between different
+devices, which may be V4L devices or other video-related devices (e.g. DRM).
+Buffers (planes) are allocated by a driver on behalf of an application. Next,
+these buffers are exported to the application as file descriptors using an API
+which is specific for an allocator driver. Only such file descriptor are
+exchanged. The descriptors and meta-information are passed in &v4l2-buffer; (or
+in &v4l2-plane; in the multi-planar API case). The driver must be switched
+into DMABUF I/O mode by calling the &VIDIOC-REQBUFS; with the desired buffer
+type.</para>
+
+ <example>
+ <title>Initiating streaming I/O with DMABUF file descriptors</title>
+
+ <programlisting>
+&v4l2-requestbuffers; reqbuf;
+
+memset(&amp;reqbuf, 0, sizeof (reqbuf));
+reqbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+reqbuf.memory = V4L2_MEMORY_DMABUF;
+reqbuf.count = 1;
+
+if (ioctl(fd, &VIDIOC-REQBUFS;, &amp;reqbuf) == -1) {
+ if (errno == EINVAL)
+ printf("Video capturing or DMABUF streaming is not supported\n");
+ else
+ perror("VIDIOC_REQBUFS");
+
+ exit(EXIT_FAILURE);
+}
+ </programlisting>
+ </example>
+
+ <para>The buffer (plane) file descriptor is passed on the fly with the
+&VIDIOC-QBUF; ioctl. In case of multiplanar buffers, every plane can be
+associated with a different DMABUF descriptor. Although buffers are commonly
+cycled, applications can pass a different DMABUF descriptor at each
+<constant>VIDIOC_QBUF</constant> call.</para>
+
+ <example>
+ <title>Queueing DMABUF using single plane API</title>
+
+ <programlisting>
+int buffer_queue(int v4lfd, int index, int dmafd)
+{
+ &v4l2-buffer; buf;
+
+ memset(&amp;buf, 0, sizeof buf);
+ buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ buf.memory = V4L2_MEMORY_DMABUF;
+ buf.index = index;
+ buf.m.fd = dmafd;
+
+ if (ioctl(v4lfd, &VIDIOC-QBUF;, &amp;buf) == -1) {
+ perror("VIDIOC_QBUF");
+ return -1;
+ }
+
+ return 0;
+}
+ </programlisting>
+ </example>
+
+ <example>
+ <title>Queueing DMABUF using multi plane API</title>
+
+ <programlisting>
+int buffer_queue_mp(int v4lfd, int index, int dmafd[], int n_planes)
+{
+ &v4l2-buffer; buf;
+ &v4l2-plane; planes[VIDEO_MAX_PLANES];
+ int i;
+
+ memset(&amp;buf, 0, sizeof buf);
+ buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
+ buf.memory = V4L2_MEMORY_DMABUF;
+ buf.index = index;
+ buf.m.planes = planes;
+ buf.length = n_planes;
+
+ memset(&amp;planes, 0, sizeof planes);
+
+ for (i = 0; i &lt; n_planes; ++i)
+ buf.m.planes[i].m.fd = dmafd[i];
+
+ if (ioctl(v4lfd, &VIDIOC-QBUF;, &amp;buf) == -1) {
+ perror("VIDIOC_QBUF");
+ return -1;
+ }
+
+ return 0;
+}
+ </programlisting>
+ </example>
+
+ <para>Captured or displayed buffers are dequeued with the
+&VIDIOC-DQBUF; ioctl. The driver can unlock the buffer at any
+time between the completion of the DMA and this ioctl. The memory is
+also unlocked when &VIDIOC-STREAMOFF; is called, &VIDIOC-REQBUFS;, or
+when the device is closed.</para>
+
+ <para>For capturing applications it is customary to enqueue a
+number of empty buffers, to start capturing and enter the read loop.
+Here the application waits until a filled buffer can be dequeued, and
+re-enqueues the buffer when the data is no longer needed. Output
+applications fill and enqueue buffers, when enough buffers are stacked
+up output is started. In the write loop, when the application
+runs out of free buffers it must wait until an empty buffer can be
+dequeued and reused. Two methods exist to suspend execution of the
+application until one or more buffers can be dequeued. By default
+<constant>VIDIOC_DQBUF</constant> blocks when no buffer is in the
+outgoing queue. When the <constant>O_NONBLOCK</constant> flag was
+given to the &func-open; function, <constant>VIDIOC_DQBUF</constant>
+returns immediately with an &EAGAIN; when no buffer is available. The
+&func-select; and &func-poll; functions are always available.</para>
+
+ <para>To start and stop capturing or displaying applications call the
+&VIDIOC-STREAMON; and &VIDIOC-STREAMOFF; ioctls. Note that
+<constant>VIDIOC_STREAMOFF</constant> removes all buffers from both queues and
+unlocks all buffers as a side effect. Since there is no notion of doing
+anything "now" on a multitasking system, if an application needs to synchronize
+with another event it should examine the &v4l2-buffer;
+<structfield>timestamp</structfield> of captured or outputted buffers.</para>
+
+ <para>Drivers implementing DMABUF importing I/O must support the
+<constant>VIDIOC_REQBUFS</constant>, <constant>VIDIOC_QBUF</constant>,
+<constant>VIDIOC_DQBUF</constant>, <constant>VIDIOC_STREAMON</constant> and
+<constant>VIDIOC_STREAMOFF</constant> ioctls, and the
+<function>select()</function> and <function>poll()</function> functions.</para>
+
+ </section>
+
+ <section id="async">
+ <title>Asynchronous I/O</title>
+
+ <para>This method is not defined yet.</para>
+ </section>
+
+ <section id="buffer">
+ <title>Buffers</title>
+
+ <para>A buffer contains data exchanged by application and
+driver using one of the Streaming I/O methods. In the multi-planar API, the
+data is held in planes, while the buffer structure acts as a container
+for the planes. Only pointers to buffers (planes) are exchanged, the data
+itself is not copied. These pointers, together with meta-information like
+timestamps or field parity, are stored in a struct
+<structname>v4l2_buffer</structname>, argument to
+the &VIDIOC-QUERYBUF;, &VIDIOC-QBUF; and &VIDIOC-DQBUF; ioctl.
+In the multi-planar API, some plane-specific members of struct
+<structname>v4l2_buffer</structname>, such as pointers and sizes for each
+plane, are stored in struct <structname>v4l2_plane</structname> instead.
+In that case, struct <structname>v4l2_buffer</structname> contains an array of
+plane structures.</para>
+
+ <para>Dequeued video buffers come with timestamps. The driver
+ decides at which part of the frame and with which clock the
+ timestamp is taken. Please see flags in the masks
+ <constant>V4L2_BUF_FLAG_TIMESTAMP_MASK</constant> and
+ <constant>V4L2_BUF_FLAG_TSTAMP_SRC_MASK</constant> in <xref
+ linkend="buffer-flags" />. These flags are always valid and constant
+ across all buffers during the whole video stream. Changes in these
+ flags may take place as a side effect of &VIDIOC-S-INPUT; or
+ &VIDIOC-S-OUTPUT; however. The
+ <constant>V4L2_BUF_FLAG_TIMESTAMP_COPY</constant> timestamp type
+ which is used by e.g. on mem-to-mem devices is an exception to the
+ rule: the timestamp source flags are copied from the OUTPUT video
+ buffer to the CAPTURE video buffer.</para>
+
+ <table frame="none" pgwide="1" id="v4l2-buffer">
+ <title>struct <structname>v4l2_buffer</structname></title>
+ <tgroup cols="4">
+ &cs-ustr;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>index</structfield></entry>
+ <entry></entry>
+ <entry>Number of the buffer, set by the application except
+when calling &VIDIOC-DQBUF;, then it is set by the driver.
+This field can range from zero to the number of buffers allocated
+with the &VIDIOC-REQBUFS; ioctl (&v4l2-requestbuffers; <structfield>count</structfield>),
+plus any buffers allocated with &VIDIOC-CREATE-BUFS; minus one.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>type</structfield></entry>
+ <entry></entry>
+ <entry>Type of the buffer, same as &v4l2-format;
+<structfield>type</structfield> or &v4l2-requestbuffers;
+<structfield>type</structfield>, set by the application. See <xref
+linkend="v4l2-buf-type" /></entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>bytesused</structfield></entry>
+ <entry></entry>
+ <entry>The number of bytes occupied by the data in the
+buffer. It depends on the negotiated data format and may change with
+each buffer for compressed variable size data like JPEG images.
+Drivers must set this field when <structfield>type</structfield>
+refers to an input stream, applications when it refers to an output stream.
+If the application sets this to 0 for an output stream, then
+<structfield>bytesused</structfield> will be set to the size of the
+buffer (see the <structfield>length</structfield> field of this struct) by
+the driver. For multiplanar formats this field is ignored and the
+<structfield>planes</structfield> pointer is used instead.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>flags</structfield></entry>
+ <entry></entry>
+ <entry>Flags set by the application or driver, see <xref
+linkend="buffer-flags" />.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>field</structfield></entry>
+ <entry></entry>
+ <entry>Indicates the field order of the image in the
+buffer, see <xref linkend="v4l2-field" />. This field is not used when
+the buffer contains VBI data. Drivers must set it when
+<structfield>type</structfield> refers to an input stream,
+applications when it refers to an output stream.</entry>
+ </row>
+ <row>
+ <entry>struct timeval</entry>
+ <entry><structfield>timestamp</structfield></entry>
+ <entry></entry>
+ <entry><para>For input streams this is time when the first data
+ byte was captured, as returned by the
+ <function>clock_gettime()</function> function for the relevant
+ clock id; see <constant>V4L2_BUF_FLAG_TIMESTAMP_*</constant> in
+ <xref linkend="buffer-flags" />. For output streams the driver
+ stores the time at which the last data byte was actually sent out
+ in the <structfield>timestamp</structfield> field. This permits
+ applications to monitor the drift between the video and system
+ clock. For output streams that use <constant>V4L2_BUF_FLAG_TIMESTAMP_COPY</constant>
+ the application has to fill in the timestamp which will be copied
+ by the driver to the capture stream.</para></entry>
+ </row>
+ <row>
+ <entry>&v4l2-timecode;</entry>
+ <entry><structfield>timecode</structfield></entry>
+ <entry></entry>
+ <entry>When <structfield>type</structfield> is
+<constant>V4L2_BUF_TYPE_VIDEO_CAPTURE</constant> and the
+<constant>V4L2_BUF_FLAG_TIMECODE</constant> flag is set in
+<structfield>flags</structfield>, this structure contains a frame
+timecode. In <link linkend="v4l2-field">V4L2_FIELD_ALTERNATE</link>
+mode the top and bottom field contain the same timecode.
+Timecodes are intended to help video editing and are typically recorded on
+video tapes, but also embedded in compressed formats like MPEG. This
+field is independent of the <structfield>timestamp</structfield> and
+<structfield>sequence</structfield> fields.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>sequence</structfield></entry>
+ <entry></entry>
+ <entry>Set by the driver, counting the frames (not fields!) in
+sequence. This field is set for both input and output devices.</entry>
+ </row>
+ <row>
+ <entry spanname="hspan"><para>In <link
+linkend="v4l2-field">V4L2_FIELD_ALTERNATE</link> mode the top and
+bottom field have the same sequence number. The count starts at zero
+and includes dropped or repeated frames. A dropped frame was received
+by an input device but could not be stored due to lack of free buffer
+space. A repeated frame was displayed again by an output device
+because the application did not pass new data in
+time.</para><para>Note this may count the frames received
+e.g. over USB, without taking into account the frames dropped by the
+remote hardware due to limited compression throughput or bus
+bandwidth. These devices identify by not enumerating any video
+standards, see <xref linkend="standard" />.</para></entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>memory</structfield></entry>
+ <entry></entry>
+ <entry>This field must be set by applications and/or drivers
+in accordance with the selected I/O method. See <xref linkend="v4l2-memory"
+ /></entry>
+ </row>
+ <row>
+ <entry>union</entry>
+ <entry><structfield>m</structfield></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>__u32</entry>
+ <entry><structfield>offset</structfield></entry>
+ <entry>For the single-planar API and when
+<structfield>memory</structfield> is <constant>V4L2_MEMORY_MMAP</constant> this
+is the offset of the buffer from the start of the device memory. The value is
+returned by the driver and apart of serving as parameter to the &func-mmap;
+function not useful for applications. See <xref linkend="mmap" /> for details
+ </entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>unsigned long</entry>
+ <entry><structfield>userptr</structfield></entry>
+ <entry>For the single-planar API and when
+<structfield>memory</structfield> is <constant>V4L2_MEMORY_USERPTR</constant>
+this is a pointer to the buffer (casted to unsigned long type) in virtual
+memory, set by the application. See <xref linkend="userp" /> for details.
+ </entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>struct v4l2_plane</entry>
+ <entry><structfield>*planes</structfield></entry>
+ <entry>When using the multi-planar API, contains a userspace pointer
+ to an array of &v4l2-plane;. The size of the array should be put
+ in the <structfield>length</structfield> field of this
+ <structname>v4l2_buffer</structname> structure.</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>int</entry>
+ <entry><structfield>fd</structfield></entry>
+ <entry>For the single-plane API and when
+<structfield>memory</structfield> is <constant>V4L2_MEMORY_DMABUF</constant> this
+is the file descriptor associated with a DMABUF buffer.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>length</structfield></entry>
+ <entry></entry>
+ <entry>Size of the buffer (not the payload) in bytes for the
+ single-planar API. This is set by the driver based on the calls to
+ &VIDIOC-REQBUFS; and/or &VIDIOC-CREATE-BUFS;. For the multi-planar API the application sets
+ this to the number of elements in the <structfield>planes</structfield>
+ array. The driver will fill in the actual number of valid elements in
+ that array.
+ </entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved2</structfield></entry>
+ <entry></entry>
+ <entry>A place holder for future extensions. Applications
+should set this to 0.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved</structfield></entry>
+ <entry></entry>
+ <entry>A place holder for future extensions. Applications
+should set this to 0.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table frame="none" pgwide="1" id="v4l2-plane">
+ <title>struct <structname>v4l2_plane</structname></title>
+ <tgroup cols="4">
+ &cs-ustr;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>bytesused</structfield></entry>
+ <entry></entry>
+ <entry>The number of bytes occupied by data in the plane
+ (its payload). Drivers must set this field when <structfield>type</structfield>
+ refers to an input stream, applications when it refers to an output stream.
+ If the application sets this to 0 for an output stream, then
+ <structfield>bytesused</structfield> will be set to the size of the
+ plane (see the <structfield>length</structfield> field of this struct)
+ by the driver. Note that the actual image data starts at
+ <structfield>data_offset</structfield> which may not be 0.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>length</structfield></entry>
+ <entry></entry>
+ <entry>Size in bytes of the plane (not its payload). This is set by the driver
+ based on the calls to &VIDIOC-REQBUFS; and/or &VIDIOC-CREATE-BUFS;.</entry>
+ </row>
+ <row>
+ <entry>union</entry>
+ <entry><structfield>m</structfield></entry>
+ <entry></entry>
+ <entry></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>__u32</entry>
+ <entry><structfield>mem_offset</structfield></entry>
+ <entry>When the memory type in the containing &v4l2-buffer; is
+ <constant>V4L2_MEMORY_MMAP</constant>, this is the value that
+ should be passed to &func-mmap;, similar to the
+ <structfield>offset</structfield> field in &v4l2-buffer;.</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>unsigned long</entry>
+ <entry><structfield>userptr</structfield></entry>
+ <entry>When the memory type in the containing &v4l2-buffer; is
+ <constant>V4L2_MEMORY_USERPTR</constant>, this is a userspace
+ pointer to the memory allocated for this plane by an application.
+ </entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>int</entry>
+ <entry><structfield>fd</structfield></entry>
+ <entry>When the memory type in the containing &v4l2-buffer; is
+ <constant>V4L2_MEMORY_DMABUF</constant>, this is a file
+ descriptor associated with a DMABUF buffer, similar to the
+ <structfield>fd</structfield> field in &v4l2-buffer;.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>data_offset</structfield></entry>
+ <entry></entry>
+ <entry>Offset in bytes to video data in the plane.
+ Drivers must set this field when <structfield>type</structfield>
+ refers to an input stream, applications when it refers to an output stream.
+ Note that data_offset is included in <structfield>bytesused</structfield>.
+ So the size of the image in the plane is
+ <structfield>bytesused</structfield>-<structfield>data_offset</structfield> at
+ offset <structfield>data_offset</structfield> from the start of the plane.
+ </entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved[11]</structfield></entry>
+ <entry></entry>
+ <entry>Reserved for future use. Should be zeroed by an
+ application.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table frame="none" pgwide="1" id="v4l2-buf-type">
+ <title>enum v4l2_buf_type</title>
+ <tgroup cols="3">
+ &cs-def;
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_BUF_TYPE_VIDEO_CAPTURE</constant></entry>
+ <entry>1</entry>
+ <entry>Buffer of a single-planar video capture stream, see <xref
+ linkend="capture" />.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE</constant>
+ </entry>
+ <entry>9</entry>
+ <entry>Buffer of a multi-planar video capture stream, see <xref
+ linkend="capture" />.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_BUF_TYPE_VIDEO_OUTPUT</constant></entry>
+ <entry>2</entry>
+ <entry>Buffer of a single-planar video output stream, see <xref
+ linkend="output" />.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE</constant>
+ </entry>
+ <entry>10</entry>
+ <entry>Buffer of a multi-planar video output stream, see <xref
+ linkend="output" />.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_BUF_TYPE_VIDEO_OVERLAY</constant></entry>
+ <entry>3</entry>
+ <entry>Buffer for video overlay, see <xref linkend="overlay" />.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_BUF_TYPE_VBI_CAPTURE</constant></entry>
+ <entry>4</entry>
+ <entry>Buffer of a raw VBI capture stream, see <xref
+ linkend="raw-vbi" />.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_BUF_TYPE_VBI_OUTPUT</constant></entry>
+ <entry>5</entry>
+ <entry>Buffer of a raw VBI output stream, see <xref
+ linkend="raw-vbi" />.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_BUF_TYPE_SLICED_VBI_CAPTURE</constant></entry>
+ <entry>6</entry>
+ <entry>Buffer of a sliced VBI capture stream, see <xref
+ linkend="sliced" />.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_BUF_TYPE_SLICED_VBI_OUTPUT</constant></entry>
+ <entry>7</entry>
+ <entry>Buffer of a sliced VBI output stream, see <xref
+ linkend="sliced" />.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY</constant></entry>
+ <entry>8</entry>
+ <entry>Buffer for video output overlay (OSD), see <xref
+ linkend="osd" />.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_BUF_TYPE_SDR_CAPTURE</constant></entry>
+ <entry>11</entry>
+ <entry>Buffer for Software Defined Radio (SDR), see <xref
+ linkend="sdr" />.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table frame="none" pgwide="1" id="buffer-flags">
+ <title>Buffer Flags</title>
+ <tgroup cols="3">
+ &cs-def;
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_BUF_FLAG_MAPPED</constant></entry>
+ <entry>0x00000001</entry>
+ <entry>The buffer resides in device memory and has been mapped
+into the application's address space, see <xref linkend="mmap" /> for details.
+Drivers set or clear this flag when the
+<link linkend="vidioc-querybuf">VIDIOC_QUERYBUF</link>, <link
+ linkend="vidioc-qbuf">VIDIOC_QBUF</link> or <link
+ linkend="vidioc-qbuf">VIDIOC_DQBUF</link> ioctl is called. Set by the driver.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_BUF_FLAG_QUEUED</constant></entry>
+ <entry>0x00000002</entry>
+ <entry>Internally drivers maintain two buffer queues, an
+incoming and outgoing queue. When this flag is set, the buffer is
+currently on the incoming queue. It automatically moves to the
+outgoing queue after the buffer has been filled (capture devices) or
+displayed (output devices). Drivers set or clear this flag when the
+<constant>VIDIOC_QUERYBUF</constant> ioctl is called. After
+(successful) calling the <constant>VIDIOC_QBUF </constant>ioctl it is
+always set and after <constant>VIDIOC_DQBUF</constant> always
+cleared.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_BUF_FLAG_DONE</constant></entry>
+ <entry>0x00000004</entry>
+ <entry>When this flag is set, the buffer is currently on
+the outgoing queue, ready to be dequeued from the driver. Drivers set
+or clear this flag when the <constant>VIDIOC_QUERYBUF</constant> ioctl
+is called. After calling the <constant>VIDIOC_QBUF</constant> or
+<constant>VIDIOC_DQBUF</constant> it is always cleared. Of course a
+buffer cannot be on both queues at the same time, the
+<constant>V4L2_BUF_FLAG_QUEUED</constant> and
+<constant>V4L2_BUF_FLAG_DONE</constant> flag are mutually exclusive.
+They can be both cleared however, then the buffer is in "dequeued"
+state, in the application domain so to say.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_BUF_FLAG_ERROR</constant></entry>
+ <entry>0x00000040</entry>
+ <entry>When this flag is set, the buffer has been dequeued
+ successfully, although the data might have been corrupted.
+ This is recoverable, streaming may continue as normal and
+ the buffer may be reused normally.
+ Drivers set this flag when the <constant>VIDIOC_DQBUF</constant>
+ ioctl is called.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_BUF_FLAG_KEYFRAME</constant></entry>
+ <entry>0x00000008</entry>
+ <entry>Drivers set or clear this flag when calling the
+<constant>VIDIOC_DQBUF</constant> ioctl. It may be set by video
+capture devices when the buffer contains a compressed image which is a
+key frame (or field), &ie; can be decompressed on its own. Also known as
+an I-frame. Applications can set this bit when <structfield>type</structfield>
+refers to an output stream.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_BUF_FLAG_PFRAME</constant></entry>
+ <entry>0x00000010</entry>
+ <entry>Similar to <constant>V4L2_BUF_FLAG_KEYFRAME</constant>
+this flags predicted frames or fields which contain only differences to a
+previous key frame. Applications can set this bit when <structfield>type</structfield>
+refers to an output stream.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_BUF_FLAG_BFRAME</constant></entry>
+ <entry>0x00000020</entry>
+ <entry>Similar to <constant>V4L2_BUF_FLAG_KEYFRAME</constant>
+this flags a bi-directional predicted frame or field which contains only
+the differences between the current frame and both the preceding and following
+key frames to specify its content. Applications can set this bit when
+<structfield>type</structfield> refers to an output stream.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_BUF_FLAG_TIMECODE</constant></entry>
+ <entry>0x00000100</entry>
+ <entry>The <structfield>timecode</structfield> field is valid.
+Drivers set or clear this flag when the <constant>VIDIOC_DQBUF</constant>
+ioctl is called. Applications can set this bit and the corresponding
+<structfield>timecode</structfield> structure when <structfield>type</structfield>
+refers to an output stream.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_BUF_FLAG_PREPARED</constant></entry>
+ <entry>0x00000400</entry>
+ <entry>The buffer has been prepared for I/O and can be queued by the
+application. Drivers set or clear this flag when the
+<link linkend="vidioc-querybuf">VIDIOC_QUERYBUF</link>, <link
+ linkend="vidioc-qbuf">VIDIOC_PREPARE_BUF</link>, <link
+ linkend="vidioc-qbuf">VIDIOC_QBUF</link> or <link
+ linkend="vidioc-qbuf">VIDIOC_DQBUF</link> ioctl is called.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_BUF_FLAG_NO_CACHE_INVALIDATE</constant></entry>
+ <entry>0x00000800</entry>
+ <entry>Caches do not have to be invalidated for this buffer.
+Typically applications shall use this flag if the data captured in the buffer
+is not going to be touched by the CPU, instead the buffer will, probably, be
+passed on to a DMA-capable hardware unit for further processing or output.
+</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_BUF_FLAG_NO_CACHE_CLEAN</constant></entry>
+ <entry>0x00001000</entry>
+ <entry>Caches do not have to be cleaned for this buffer.
+Typically applications shall use this flag for output buffers if the data
+in this buffer has not been created by the CPU but by some DMA-capable unit,
+in which case caches have not been used.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_BUF_FLAG_TIMESTAMP_MASK</constant></entry>
+ <entry>0x0000e000</entry>
+ <entry>Mask for timestamp types below. To test the
+ timestamp type, mask out bits not belonging to timestamp
+ type by performing a logical and operation with buffer
+ flags and timestamp mask.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_BUF_FLAG_TIMESTAMP_UNKNOWN</constant></entry>
+ <entry>0x00000000</entry>
+ <entry>Unknown timestamp type. This type is used by
+ drivers before Linux 3.9 and may be either monotonic (see
+ below) or realtime (wall clock). Monotonic clock has been
+ favoured in embedded systems whereas most of the drivers
+ use the realtime clock. Either kinds of timestamps are
+ available in user space via
+ <function>clock_gettime(2)</function> using clock IDs
+ <constant>CLOCK_MONOTONIC</constant> and
+ <constant>CLOCK_REALTIME</constant>, respectively.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC</constant></entry>
+ <entry>0x00002000</entry>
+ <entry>The buffer timestamp has been taken from the
+ <constant>CLOCK_MONOTONIC</constant> clock. To access the
+ same clock outside V4L2, use
+ <function>clock_gettime(2)</function> .</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_BUF_FLAG_TIMESTAMP_COPY</constant></entry>
+ <entry>0x00004000</entry>
+ <entry>The CAPTURE buffer timestamp has been taken from the
+ corresponding OUTPUT buffer. This flag applies only to mem2mem devices.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_BUF_FLAG_TSTAMP_SRC_MASK</constant></entry>
+ <entry>0x00070000</entry>
+ <entry>Mask for timestamp sources below. The timestamp source
+ defines the point of time the timestamp is taken in relation to
+ the frame. Logical 'and' operation between the
+ <structfield>flags</structfield> field and
+ <constant>V4L2_BUF_FLAG_TSTAMP_SRC_MASK</constant> produces the
+ value of the timestamp source. Applications must set the timestamp
+ source when <structfield>type</structfield> refers to an output stream
+ and <constant>V4L2_BUF_FLAG_TIMESTAMP_COPY</constant> is set.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_BUF_FLAG_TSTAMP_SRC_EOF</constant></entry>
+ <entry>0x00000000</entry>
+ <entry>End Of Frame. The buffer timestamp has been taken
+ when the last pixel of the frame has been received or the
+ last pixel of the frame has been transmitted. In practice,
+ software generated timestamps will typically be read from
+ the clock a small amount of time after the last pixel has
+ been received or transmitten, depending on the system and
+ other activity in it.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_BUF_FLAG_TSTAMP_SRC_SOE</constant></entry>
+ <entry>0x00010000</entry>
+ <entry>Start Of Exposure. The buffer timestamp has been
+ taken when the exposure of the frame has begun. This is
+ only valid for the
+ <constant>V4L2_BUF_TYPE_VIDEO_CAPTURE</constant> buffer
+ type.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="v4l2-memory">
+ <title>enum v4l2_memory</title>
+ <tgroup cols="3">
+ &cs-def;
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_MEMORY_MMAP</constant></entry>
+ <entry>1</entry>
+ <entry>The buffer is used for <link linkend="mmap">memory
+mapping</link> I/O.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MEMORY_USERPTR</constant></entry>
+ <entry>2</entry>
+ <entry>The buffer is used for <link linkend="userp">user
+pointer</link> I/O.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MEMORY_OVERLAY</constant></entry>
+ <entry>3</entry>
+ <entry>[to do]</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_MEMORY_DMABUF</constant></entry>
+ <entry>4</entry>
+ <entry>The buffer is used for <link linkend="dmabuf">DMA shared
+buffer</link> I/O.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <section>
+ <title>Timecodes</title>
+
+ <para>The <structname>v4l2_timecode</structname> structure is
+designed to hold a <xref linkend="smpte12m" /> or similar timecode.
+(struct <structname>timeval</structname> timestamps are stored in
+&v4l2-buffer; field <structfield>timestamp</structfield>.)</para>
+
+ <table frame="none" pgwide="1" id="v4l2-timecode">
+ <title>struct <structname>v4l2_timecode</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>type</structfield></entry>
+ <entry>Frame rate the timecodes are based on, see <xref
+ linkend="timecode-type" />.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>flags</structfield></entry>
+ <entry>Timecode flags, see <xref linkend="timecode-flags" />.</entry>
+ </row>
+ <row>
+ <entry>__u8</entry>
+ <entry><structfield>frames</structfield></entry>
+ <entry>Frame count, 0 ... 23/24/29/49/59, depending on the
+ type of timecode.</entry>
+ </row>
+ <row>
+ <entry>__u8</entry>
+ <entry><structfield>seconds</structfield></entry>
+ <entry>Seconds count, 0 ... 59. This is a binary, not BCD number.</entry>
+ </row>
+ <row>
+ <entry>__u8</entry>
+ <entry><structfield>minutes</structfield></entry>
+ <entry>Minutes count, 0 ... 59. This is a binary, not BCD number.</entry>
+ </row>
+ <row>
+ <entry>__u8</entry>
+ <entry><structfield>hours</structfield></entry>
+ <entry>Hours count, 0 ... 29. This is a binary, not BCD number.</entry>
+ </row>
+ <row>
+ <entry>__u8</entry>
+ <entry><structfield>userbits</structfield>[4]</entry>
+ <entry>The "user group" bits from the timecode.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table frame="none" pgwide="1" id="timecode-type">
+ <title>Timecode Types</title>
+ <tgroup cols="3">
+ &cs-def;
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_TC_TYPE_24FPS</constant></entry>
+ <entry>1</entry>
+ <entry>24 frames per second, i.&nbsp;e. film.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_TC_TYPE_25FPS</constant></entry>
+ <entry>2</entry>
+ <entry>25 frames per second, &ie; PAL or SECAM video.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_TC_TYPE_30FPS</constant></entry>
+ <entry>3</entry>
+ <entry>30 frames per second, &ie; NTSC video.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_TC_TYPE_50FPS</constant></entry>
+ <entry>4</entry>
+ <entry></entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_TC_TYPE_60FPS</constant></entry>
+ <entry>5</entry>
+ <entry></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table frame="none" pgwide="1" id="timecode-flags">
+ <title>Timecode Flags</title>
+ <tgroup cols="3">
+ &cs-def;
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_TC_FLAG_DROPFRAME</constant></entry>
+ <entry>0x0001</entry>
+ <entry>Indicates "drop frame" semantics for counting frames
+in 29.97 fps material. When set, frame numbers 0 and 1 at the start of
+each minute, except minutes 0, 10, 20, 30, 40, 50 are omitted from the
+count.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_TC_FLAG_COLORFRAME</constant></entry>
+ <entry>0x0002</entry>
+ <entry>The "color frame" flag.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_TC_USERBITS_field</constant></entry>
+ <entry>0x000C</entry>
+ <entry>Field mask for the "binary group flags".</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_TC_USERBITS_USERDEFINED</constant></entry>
+ <entry>0x0000</entry>
+ <entry>Unspecified format.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_TC_USERBITS_8BITCHARS</constant></entry>
+ <entry>0x0008</entry>
+ <entry>8-bit ISO characters.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </section>
+ </section>
+
+ <section id="field-order">
+ <title>Field Order</title>
+
+ <para>We have to distinguish between progressive and interlaced
+video. Progressive video transmits all lines of a video image
+sequentially. Interlaced video divides an image into two fields,
+containing only the odd and even lines of the image, respectively.
+Alternating the so called odd and even field are transmitted, and due
+to a small delay between fields a cathode ray TV displays the lines
+interleaved, yielding the original frame. This curious technique was
+invented because at refresh rates similar to film the image would
+fade out too quickly. Transmitting fields reduces the flicker without
+the necessity of doubling the frame rate and with it the bandwidth
+required for each channel.</para>
+
+ <para>It is important to understand a video camera does not expose
+one frame at a time, merely transmitting the frames separated into
+fields. The fields are in fact captured at two different instances in
+time. An object on screen may well move between one field and the
+next. For applications analysing motion it is of paramount importance
+to recognize which field of a frame is older, the <emphasis>temporal
+order</emphasis>.</para>
+
+ <para>When the driver provides or accepts images field by field
+rather than interleaved, it is also important applications understand
+how the fields combine to frames. We distinguish between top (aka odd) and
+bottom (aka even) fields, the <emphasis>spatial order</emphasis>: The first line
+of the top field is the first line of an interlaced frame, the first
+line of the bottom field is the second line of that frame.</para>
+
+ <para>However because fields were captured one after the other,
+arguing whether a frame commences with the top or bottom field is
+pointless. Any two successive top and bottom, or bottom and top fields
+yield a valid frame. Only when the source was progressive to begin
+with, &eg; when transferring film to video, two fields may come from
+the same frame, creating a natural order.</para>
+
+ <para>Counter to intuition the top field is not necessarily the
+older field. Whether the older field contains the top or bottom lines
+is a convention determined by the video standard. Hence the
+distinction between temporal and spatial order of fields. The diagrams
+below should make this clearer.</para>
+
+ <para>All video capture and output devices must report the current
+field order. Some drivers may permit the selection of a different
+order, to this end applications initialize the
+<structfield>field</structfield> field of &v4l2-pix-format; before
+calling the &VIDIOC-S-FMT; ioctl. If this is not desired it should
+have the value <constant>V4L2_FIELD_ANY</constant> (0).</para>
+
+ <table frame="none" pgwide="1" id="v4l2-field">
+ <title>enum v4l2_field</title>
+ <tgroup cols="3">
+ &cs-def;
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_FIELD_ANY</constant></entry>
+ <entry>0</entry>
+ <entry>Applications request this field order when any
+one of the <constant>V4L2_FIELD_NONE</constant>,
+<constant>V4L2_FIELD_TOP</constant>,
+<constant>V4L2_FIELD_BOTTOM</constant>, or
+<constant>V4L2_FIELD_INTERLACED</constant> formats is acceptable.
+Drivers choose depending on hardware capabilities or e.&nbsp;g. the
+requested image size, and return the actual field order. Drivers must
+never return <constant>V4L2_FIELD_ANY</constant>. If multiple
+field orders are possible the driver must choose one of the possible
+field orders during &VIDIOC-S-FMT; or &VIDIOC-TRY-FMT;. &v4l2-buffer;
+<structfield>field</structfield> can never be
+<constant>V4L2_FIELD_ANY</constant>.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_FIELD_NONE</constant></entry>
+ <entry>1</entry>
+ <entry>Images are in progressive format, not interlaced.
+The driver may also indicate this order when it cannot distinguish
+between <constant>V4L2_FIELD_TOP</constant> and
+<constant>V4L2_FIELD_BOTTOM</constant>.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_FIELD_TOP</constant></entry>
+ <entry>2</entry>
+ <entry>Images consist of the top (aka odd) field only.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_FIELD_BOTTOM</constant></entry>
+ <entry>3</entry>
+ <entry>Images consist of the bottom (aka even) field only.
+Applications may wish to prevent a device from capturing interlaced
+images because they will have "comb" or "feathering" artefacts around
+moving objects.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_FIELD_INTERLACED</constant></entry>
+ <entry>4</entry>
+ <entry>Images contain both fields, interleaved line by
+line. The temporal order of the fields (whether the top or bottom
+field is first transmitted) depends on the current video standard.
+M/NTSC transmits the bottom field first, all other standards the top
+field first.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_FIELD_SEQ_TB</constant></entry>
+ <entry>5</entry>
+ <entry>Images contain both fields, the top field lines
+are stored first in memory, immediately followed by the bottom field
+lines. Fields are always stored in temporal order, the older one first
+in memory. Image sizes refer to the frame, not fields.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_FIELD_SEQ_BT</constant></entry>
+ <entry>6</entry>
+ <entry>Images contain both fields, the bottom field
+lines are stored first in memory, immediately followed by the top
+field lines. Fields are always stored in temporal order, the older one
+first in memory. Image sizes refer to the frame, not fields.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_FIELD_ALTERNATE</constant></entry>
+ <entry>7</entry>
+ <entry>The two fields of a frame are passed in separate
+buffers, in temporal order, &ie; the older one first. To indicate the field
+parity (whether the current field is a top or bottom field) the driver
+or application, depending on data direction, must set &v4l2-buffer;
+<structfield>field</structfield> to
+<constant>V4L2_FIELD_TOP</constant> or
+<constant>V4L2_FIELD_BOTTOM</constant>. Any two successive fields pair
+to build a frame. If fields are successive, without any dropped fields
+between them (fields can drop individually), can be determined from
+the &v4l2-buffer; <structfield>sequence</structfield> field. This format
+cannot be selected when using the read/write I/O method since there
+is no way to communicate if a field was a top or bottom field.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_FIELD_INTERLACED_TB</constant></entry>
+ <entry>8</entry>
+ <entry>Images contain both fields, interleaved line by
+line, top field first. The top field is transmitted first.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_FIELD_INTERLACED_BT</constant></entry>
+ <entry>9</entry>
+ <entry>Images contain both fields, interleaved line by
+line, top field first. The bottom field is transmitted first.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <figure id="fieldseq-tb">
+ <title>Field Order, Top Field First Transmitted</title>
+ <mediaobject>
+ <imageobject>
+ <imagedata fileref="fieldseq_tb.pdf" format="PS" />
+ </imageobject>
+ <imageobject>
+ <imagedata fileref="fieldseq_tb.gif" format="GIF" />
+ </imageobject>
+ </mediaobject>
+ </figure>
+
+ <figure id="fieldseq-bt">
+ <title>Field Order, Bottom Field First Transmitted</title>
+ <mediaobject>
+ <imageobject>
+ <imagedata fileref="fieldseq_bt.pdf" format="PS" />
+ </imageobject>
+ <imageobject>
+ <imagedata fileref="fieldseq_bt.gif" format="GIF" />
+ </imageobject>
+ </mediaobject>
+ </figure>
+ </section>
diff --git a/Documentation/DocBook/media/v4l/keytable.c.xml b/Documentation/DocBook/media/v4l/keytable.c.xml
new file mode 100644
index 000000000..d53254a3b
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/keytable.c.xml
@@ -0,0 +1,172 @@
+<programlisting>
+/* keytable.c - This program allows checking/replacing keys at IR
+
+ Copyright (C) 2006-2009 Mauro Carvalho Chehab &lt;mchehab@infradead.org&gt;
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, version 2 of the License.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+ */
+
+#include &lt;ctype.h&gt;
+#include &lt;errno.h&gt;
+#include &lt;fcntl.h&gt;
+#include &lt;stdio.h&gt;
+#include &lt;stdlib.h&gt;
+#include &lt;string.h&gt;
+#include &lt;linux/input.h&gt;
+#include &lt;sys/ioctl.h&gt;
+
+#include "parse.h"
+
+void prtcode (int *codes)
+{
+ struct parse_key *p;
+
+ for (p=keynames;p-&gt;name!=NULL;p++) {
+ if (p-&gt;value == (unsigned)codes[1]) {
+ printf("scancode 0x%04x = %s (0x%02x)\n", codes[0], p-&gt;name, codes[1]);
+ return;
+ }
+ }
+
+ if (isprint (codes[1]))
+ printf("scancode %d = '%c' (0x%02x)\n", codes[0], codes[1], codes[1]);
+ else
+ printf("scancode %d = 0x%02x\n", codes[0], codes[1]);
+}
+
+int parse_code(char *string)
+{
+ struct parse_key *p;
+
+ for (p=keynames;p-&gt;name!=NULL;p++) {
+ if (!strcasecmp(p-&gt;name, string)) {
+ return p-&gt;value;
+ }
+ }
+ return -1;
+}
+
+int main (int argc, char *argv[])
+{
+ int fd;
+ unsigned int i, j;
+ int codes[2];
+
+ if (argc&lt;2 || argc&gt;4) {
+ printf ("usage: %s &lt;device&gt; to get table; or\n"
+ " %s &lt;device&gt; &lt;scancode&gt; &lt;keycode&gt;\n"
+ " %s &lt;device&gt; &lt;keycode_file&gt;\n",*argv,*argv,*argv);
+ return -1;
+ }
+
+ if ((fd = open(argv[1], O_RDONLY)) &lt; 0) {
+ perror("Couldn't open input device");
+ return(-1);
+ }
+
+ if (argc==4) {
+ int value;
+
+ value=parse_code(argv[3]);
+
+ if (value==-1) {
+ value = strtol(argv[3], NULL, 0);
+ if (errno)
+ perror("value");
+ }
+
+ codes [0] = (unsigned) strtol(argv[2], NULL, 0);
+ codes [1] = (unsigned) value;
+
+ if(ioctl(fd, EVIOCSKEYCODE, codes))
+ perror ("EVIOCSKEYCODE");
+
+ if(ioctl(fd, EVIOCGKEYCODE, codes)==0)
+ prtcode(codes);
+ return 0;
+ }
+
+ if (argc==3) {
+ FILE *fin;
+ int value;
+ char *scancode, *keycode, s[2048];
+
+ fin=fopen(argv[2],"r");
+ if (fin==NULL) {
+ perror ("opening keycode file");
+ return -1;
+ }
+
+ /* Clears old table */
+ for (j = 0; j &lt; 256; j++) {
+ for (i = 0; i &lt; 256; i++) {
+ codes[0] = (j &lt;&lt; 8) | i;
+ codes[1] = KEY_RESERVED;
+ ioctl(fd, EVIOCSKEYCODE, codes);
+ }
+ }
+
+ while (fgets(s,sizeof(s),fin)) {
+ scancode=strtok(s,"\n\t =:");
+ if (!scancode) {
+ perror ("parsing input file scancode");
+ return -1;
+ }
+ if (!strcasecmp(scancode, "scancode")) {
+ scancode = strtok(NULL,"\n\t =:");
+ if (!scancode) {
+ perror ("parsing input file scancode");
+ return -1;
+ }
+ }
+
+ keycode=strtok(NULL,"\n\t =:(");
+ if (!keycode) {
+ perror ("parsing input file keycode");
+ return -1;
+ }
+
+ // printf ("parsing %s=%s:", scancode, keycode);
+ value=parse_code(keycode);
+ // printf ("\tvalue=%d\n",value);
+
+ if (value==-1) {
+ value = strtol(keycode, NULL, 0);
+ if (errno)
+ perror("value");
+ }
+
+ codes [0] = (unsigned) strtol(scancode, NULL, 0);
+ codes [1] = (unsigned) value;
+
+ // printf("\t%04x=%04x\n",codes[0], codes[1]);
+ if(ioctl(fd, EVIOCSKEYCODE, codes)) {
+ fprintf(stderr, "Setting scancode 0x%04x with 0x%04x via ",codes[0], codes[1]);
+ perror ("EVIOCSKEYCODE");
+ }
+
+ if(ioctl(fd, EVIOCGKEYCODE, codes)==0)
+ prtcode(codes);
+ }
+ return 0;
+ }
+
+ /* Get scancode table */
+ for (j = 0; j &lt; 256; j++) {
+ for (i = 0; i &lt; 256; i++) {
+ codes[0] = (j &lt;&lt; 8) | i;
+ if (!ioctl(fd, EVIOCGKEYCODE, codes) &amp;&amp; codes[1] != KEY_RESERVED)
+ prtcode(codes);
+ }
+ }
+ return 0;
+}
+
+</programlisting>
diff --git a/Documentation/DocBook/media/v4l/libv4l.xml b/Documentation/DocBook/media/v4l/libv4l.xml
new file mode 100644
index 000000000..d3b71e200
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/libv4l.xml
@@ -0,0 +1,160 @@
+<title>Libv4l Userspace Library</title>
+<section id="libv4l-introduction">
+ <title>Introduction</title>
+
+ <para>libv4l is a collection of libraries which adds a thin abstraction
+layer on top of video4linux2 devices. The purpose of this (thin) layer
+is to make it easy for application writers to support a wide variety of
+devices without having to write separate code for different devices in the
+same class.</para>
+<para>An example of using libv4l is provided by
+<link linkend='v4l2grab-example'>v4l2grab</link>.
+</para>
+
+ <para>libv4l consists of 3 different libraries:</para>
+ <section>
+ <title>libv4lconvert</title>
+
+ <para>libv4lconvert is a library that converts several
+different pixelformats found in V4L2 drivers into a few common RGB and
+YUY formats.</para>
+ <para>It currently accepts the following V4L2 driver formats:
+<link linkend="V4L2-PIX-FMT-BGR24"><constant>V4L2_PIX_FMT_BGR24</constant></link>,
+<link linkend="V4L2-PIX-FMT-HM12"><constant>V4L2_PIX_FMT_HM12</constant></link>,
+<link linkend="V4L2-PIX-FMT-JPEG"><constant>V4L2_PIX_FMT_JPEG</constant></link>,
+<link linkend="V4L2-PIX-FMT-MJPEG"><constant>V4L2_PIX_FMT_MJPEG</constant></link>,
+<link linkend="V4L2-PIX-FMT-MR97310A"><constant>V4L2_PIX_FMT_MR97310A</constant></link>,
+<link linkend="V4L2-PIX-FMT-OV511"><constant>V4L2_PIX_FMT_OV511</constant></link>,
+<link linkend="V4L2-PIX-FMT-OV518"><constant>V4L2_PIX_FMT_OV518</constant></link>,
+<link linkend="V4L2-PIX-FMT-PAC207"><constant>V4L2_PIX_FMT_PAC207</constant></link>,
+<link linkend="V4L2-PIX-FMT-PJPG"><constant>V4L2_PIX_FMT_PJPG</constant></link>,
+<link linkend="V4L2-PIX-FMT-RGB24"><constant>V4L2_PIX_FMT_RGB24</constant></link>,
+<link linkend="V4L2-PIX-FMT-SBGGR8"><constant>V4L2_PIX_FMT_SBGGR8</constant></link>,
+<link linkend="V4L2-PIX-FMT-SGBRG8"><constant>V4L2_PIX_FMT_SGBRG8</constant></link>,
+<link linkend="V4L2-PIX-FMT-SGRBG8"><constant>V4L2_PIX_FMT_SGRBG8</constant></link>,
+<link linkend="V4L2-PIX-FMT-SN9C10X"><constant>V4L2_PIX_FMT_SN9C10X</constant></link>,
+<link linkend="V4L2-PIX-FMT-SN9C20X-I420"><constant>V4L2_PIX_FMT_SN9C20X_I420</constant></link>,
+<link linkend="V4L2-PIX-FMT-SPCA501"><constant>V4L2_PIX_FMT_SPCA501</constant></link>,
+<link linkend="V4L2-PIX-FMT-SPCA505"><constant>V4L2_PIX_FMT_SPCA505</constant></link>,
+<link linkend="V4L2-PIX-FMT-SPCA508"><constant>V4L2_PIX_FMT_SPCA508</constant></link>,
+<link linkend="V4L2-PIX-FMT-SPCA561"><constant>V4L2_PIX_FMT_SPCA561</constant></link>,
+<link linkend="V4L2-PIX-FMT-SQ905C"><constant>V4L2_PIX_FMT_SQ905C</constant></link>,
+<constant>V4L2_PIX_FMT_SRGGB8</constant>,
+<link linkend="V4L2-PIX-FMT-UYVY"><constant>V4L2_PIX_FMT_UYVY</constant></link>,
+<link linkend="V4L2-PIX-FMT-YUV420"><constant>V4L2_PIX_FMT_YUV420</constant></link>,
+<link linkend="V4L2-PIX-FMT-YUYV"><constant>V4L2_PIX_FMT_YUYV</constant></link>,
+<link linkend="V4L2-PIX-FMT-YVU420"><constant>V4L2_PIX_FMT_YVU420</constant></link>,
+and <link linkend="V4L2-PIX-FMT-YVYU"><constant>V4L2_PIX_FMT_YVYU</constant></link>.
+</para>
+ <para>Later on libv4lconvert was expanded to also be able to do
+various video processing functions to improve webcam video quality.
+The video processing is split in to 2 parts: libv4lconvert/control and
+libv4lconvert/processing.</para>
+
+ <para>The control part is used to offer video controls which can
+be used to control the video processing functions made available by
+ libv4lconvert/processing. These controls are stored application wide
+(until reboot) by using a persistent shared memory object.</para>
+
+ <para>libv4lconvert/processing offers the actual video
+processing functionality.</para>
+ </section>
+ <section>
+ <title>libv4l1</title>
+ <para>This library offers functions that can be used to quickly
+make v4l1 applications work with v4l2 devices. These functions work exactly
+like the normal open/close/etc, except that libv4l1 does full emulation of
+the v4l1 api on top of v4l2 drivers, in case of v4l1 drivers it
+will just pass calls through.</para>
+ <para>Since those functions are emulations of the old V4L1 API,
+it shouldn't be used for new applications.</para>
+ </section>
+ <section>
+ <title>libv4l2</title>
+ <para>This library should be used for all modern V4L2
+applications.</para>
+ <para>It provides handles to call V4L2 open/ioctl/close/poll
+methods. Instead of just providing the raw output of the device, it enhances
+the calls in the sense that it will use libv4lconvert to provide more video
+formats and to enhance the image quality.</para>
+ <para>In most cases, libv4l2 just passes the calls directly
+through to the v4l2 driver, intercepting the calls to
+<link linkend='vidioc-g-fmt'><constant>VIDIOC_TRY_FMT</constant></link>,
+<link linkend='vidioc-g-fmt'><constant>VIDIOC_G_FMT</constant></link>
+<link linkend='vidioc-g-fmt'><constant>VIDIOC_S_FMT</constant></link>
+<link linkend='vidioc-enum-framesizes'><constant>VIDIOC_ENUM_FRAMESIZES</constant></link>
+and <link linkend='vidioc-enum-frameintervals'><constant>VIDIOC_ENUM_FRAMEINTERVALS</constant></link>
+in order to emulate the formats
+<link linkend="V4L2-PIX-FMT-BGR24"><constant>V4L2_PIX_FMT_BGR24</constant></link>,
+<link linkend="V4L2-PIX-FMT-RGB24"><constant>V4L2_PIX_FMT_RGB24</constant></link>,
+<link linkend="V4L2-PIX-FMT-YUV420"><constant>V4L2_PIX_FMT_YUV420</constant></link>,
+and <link linkend="V4L2-PIX-FMT-YVU420"><constant>V4L2_PIX_FMT_YVU420</constant></link>,
+if they aren't available in the driver.
+<link linkend='vidioc-enum-fmt'><constant>VIDIOC_ENUM_FMT</constant></link>
+keeps enumerating the hardware supported formats, plus the emulated formats
+offered by libv4l at the end.
+</para>
+ <section id="libv4l-ops">
+ <title>Libv4l device control functions</title>
+ <para>The common file operation methods are provided by
+libv4l.</para>
+ <para>Those functions operate just like glibc
+open/close/dup/ioctl/read/mmap/munmap:</para>
+<itemizedlist><listitem>
+ <para>int v4l2_open(const char *file, int oflag,
+...) -
+operates like the standard <link linkend='func-open'>open()</link> function.
+</para></listitem><listitem>
+ <para>int v4l2_close(int fd) -
+operates like the standard <link linkend='func-close'>close()</link> function.
+</para></listitem><listitem>
+ <para>int v4l2_dup(int fd) -
+operates like the standard dup() function, duplicating a file handler.
+</para></listitem><listitem>
+ <para>int v4l2_ioctl (int fd, unsigned long int request, ...) -
+operates like the standard <link linkend='func-ioctl'>ioctl()</link> function.
+</para></listitem><listitem>
+ <para>int v4l2_read (int fd, void* buffer, size_t n) -
+operates like the standard <link linkend='func-read'>read()</link> function.
+</para></listitem><listitem>
+ <para>void v4l2_mmap(void *start, size_t length, int prot, int flags, int fd, int64_t offset); -
+operates like the standard <link linkend='func-mmap'>mmap()</link> function.
+</para></listitem><listitem>
+ <para>int v4l2_munmap(void *_start, size_t length); -
+operates like the standard <link linkend='func-munmap'>munmap()</link> function.
+</para></listitem>
+</itemizedlist>
+ <para>Those functions provide additional control:</para>
+<itemizedlist><listitem>
+ <para>int v4l2_fd_open(int fd, int v4l2_flags) -
+opens an already opened fd for further use through v4l2lib and possibly
+modify libv4l2's default behavior through the v4l2_flags argument.
+Currently, v4l2_flags can be <constant>V4L2_DISABLE_CONVERSION</constant>,
+to disable format conversion.
+</para></listitem><listitem>
+ <para>int v4l2_set_control(int fd, int cid, int value) -
+This function takes a value of 0 - 65535, and then scales that range to
+the actual range of the given v4l control id, and then if the cid exists
+and is not locked sets the cid to the scaled value.
+</para></listitem><listitem>
+ <para>int v4l2_get_control(int fd, int cid) -
+This function returns a value of 0 - 65535, scaled to from the actual range
+of the given v4l control id. when the cid does not exist, could not be
+accessed for some reason, or some error occurred 0 is returned.
+</para></listitem>
+</itemizedlist>
+ </section>
+ </section>
+ <section>
+
+ <title>v4l1compat.so wrapper library</title>
+
+ <para>This library intercepts calls to
+open/close/ioctl/mmap/mmunmap operations and redirects them to the libv4l
+counterparts, by using LD_PRELOAD=/usr/lib/v4l1compat.so. It also
+emulates V4L1 calls via V4L2 API.</para>
+ <para>It allows usage of binary legacy applications that
+still don't use libv4l.</para>
+ </section>
+
+</section>
diff --git a/Documentation/DocBook/media/v4l/lirc_device_interface.xml b/Documentation/DocBook/media/v4l/lirc_device_interface.xml
new file mode 100644
index 000000000..34cada2ca
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/lirc_device_interface.xml
@@ -0,0 +1,255 @@
+<section id="lirc_dev">
+<title>LIRC Device Interface</title>
+
+
+<section id="lirc_dev_intro">
+<title>Introduction</title>
+
+<para>The LIRC device interface is a bi-directional interface for
+transporting raw IR data between userspace and kernelspace. Fundamentally,
+it is just a chardev (/dev/lircX, for X = 0, 1, 2, ...), with a number
+of standard struct file_operations defined on it. With respect to
+transporting raw IR data to and fro, the essential fops are read, write
+and ioctl.</para>
+
+<para>Example dmesg output upon a driver registering w/LIRC:</para>
+ <blockquote>
+ <para>$ dmesg |grep lirc_dev</para>
+ <para>lirc_dev: IR Remote Control driver registered, major 248</para>
+ <para>rc rc0: lirc_dev: driver ir-lirc-codec (mceusb) registered at minor = 0</para>
+ </blockquote>
+
+<para>What you should see for a chardev:</para>
+ <blockquote>
+ <para>$ ls -l /dev/lirc*</para>
+ <para>crw-rw---- 1 root root 248, 0 Jul 2 22:20 /dev/lirc0</para>
+ </blockquote>
+</section>
+
+<section id="lirc_read">
+<title>LIRC read fop</title>
+
+<para>The lircd userspace daemon reads raw IR data from the LIRC chardev. The
+exact format of the data depends on what modes a driver supports, and what
+mode has been selected. lircd obtains supported modes and sets the active mode
+via the ioctl interface, detailed at <xref linkend="lirc_ioctl"/>. The generally
+preferred mode is LIRC_MODE_MODE2, in which packets containing an int value
+describing an IR signal are read from the chardev.</para>
+
+<para>See also <ulink url="http://www.lirc.org/html/technical.html">http://www.lirc.org/html/technical.html</ulink> for more info.</para>
+</section>
+
+<section id="lirc_write">
+<title>LIRC write fop</title>
+
+<para>The data written to the chardev is a pulse/space sequence of integer
+values. Pulses and spaces are only marked implicitly by their position. The
+data must start and end with a pulse, therefore, the data must always include
+an uneven number of samples. The write function must block until the data has
+been transmitted by the hardware. If more data is provided than the hardware
+can send, the driver returns EINVAL.</para>
+
+</section>
+
+<section id="lirc_ioctl">
+<title>LIRC ioctl fop</title>
+
+<para>The LIRC device's ioctl definition is bound by the ioctl function
+definition of struct file_operations, leaving us with an unsigned int
+for the ioctl command and an unsigned long for the arg. For the purposes
+of ioctl portability across 32-bit and 64-bit, these values are capped
+to their 32-bit sizes.</para>
+
+<para>The following ioctls can be used to change specific hardware settings.
+In general each driver should have a default set of settings. The driver
+implementation is expected to re-apply the default settings when the device
+is closed by user-space, so that every application opening the device can rely
+on working with the default settings initially.</para>
+
+<variablelist>
+ <varlistentry>
+ <term>LIRC_GET_FEATURES</term>
+ <listitem>
+ <para>Obviously, get the underlying hardware device's features. If a driver
+ does not announce support of certain features, calling of the corresponding
+ ioctls is undefined.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>LIRC_GET_SEND_MODE</term>
+ <listitem>
+ <para>Get supported transmit mode. Only LIRC_MODE_PULSE is supported by lircd.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>LIRC_GET_REC_MODE</term>
+ <listitem>
+ <para>Get supported receive modes. Only LIRC_MODE_MODE2 and LIRC_MODE_LIRCCODE
+ are supported by lircd.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>LIRC_GET_SEND_CARRIER</term>
+ <listitem>
+ <para>Get carrier frequency (in Hz) currently used for transmit.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>LIRC_GET_REC_CARRIER</term>
+ <listitem>
+ <para>Get carrier frequency (in Hz) currently used for IR reception.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>LIRC_{G,S}ET_{SEND,REC}_DUTY_CYCLE</term>
+ <listitem>
+ <para>Get/set the duty cycle (from 0 to 100) of the carrier signal. Currently,
+ no special meaning is defined for 0 or 100, but this could be used to switch
+ off carrier generation in the future, so these values should be reserved.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>LIRC_GET_REC_RESOLUTION</term>
+ <listitem>
+ <para>Some receiver have maximum resolution which is defined by internal
+ sample rate or data format limitations. E.g. it's common that signals can
+ only be reported in 50 microsecond steps. This integer value is used by
+ lircd to automatically adjust the aeps tolerance value in the lircd
+ config file.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>LIRC_GET_M{IN,AX}_TIMEOUT</term>
+ <listitem>
+ <para>Some devices have internal timers that can be used to detect when
+ there's no IR activity for a long time. This can help lircd in detecting
+ that a IR signal is finished and can speed up the decoding process.
+ Returns an integer value with the minimum/maximum timeout that can be
+ set. Some devices have a fixed timeout, in that case both ioctls will
+ return the same value even though the timeout cannot be changed.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>LIRC_GET_M{IN,AX}_FILTER_{PULSE,SPACE}</term>
+ <listitem>
+ <para>Some devices are able to filter out spikes in the incoming signal
+ using given filter rules. These ioctls return the hardware capabilities
+ that describe the bounds of the possible filters. Filter settings depend
+ on the IR protocols that are expected. lircd derives the settings from
+ all protocols definitions found in its config file.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>LIRC_GET_LENGTH</term>
+ <listitem>
+ <para>Retrieves the code length in bits (only for LIRC_MODE_LIRCCODE).
+ Reads on the device must be done in blocks matching the bit count.
+ The bit could should be rounded up so that it matches full bytes.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>LIRC_SET_{SEND,REC}_MODE</term>
+ <listitem>
+ <para>Set send/receive mode. Largely obsolete for send, as only
+ LIRC_MODE_PULSE is supported.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>LIRC_SET_{SEND,REC}_CARRIER</term>
+ <listitem>
+ <para>Set send/receive carrier (in Hz).</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>LIRC_SET_TRANSMITTER_MASK</term>
+ <listitem>
+ <para>This enables the given set of transmitters. The first transmitter
+ is encoded by the least significant bit, etc. When an invalid bit mask
+ is given, i.e. a bit is set, even though the device does not have so many
+ transitters, then this ioctl returns the number of available transitters
+ and does nothing otherwise.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>LIRC_SET_REC_TIMEOUT</term>
+ <listitem>
+ <para>Sets the integer value for IR inactivity timeout (cf.
+ LIRC_GET_MIN_TIMEOUT and LIRC_GET_MAX_TIMEOUT). A value of 0 (if
+ supported by the hardware) disables all hardware timeouts and data should
+ be reported as soon as possible. If the exact value cannot be set, then
+ the next possible value _greater_ than the given value should be set.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>LIRC_SET_REC_TIMEOUT_REPORTS</term>
+ <listitem>
+ <para>Enable (1) or disable (0) timeout reports in LIRC_MODE_MODE2. By
+ default, timeout reports should be turned off.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>LIRC_SET_REC_FILTER_{,PULSE,SPACE}</term>
+ <listitem>
+ <para>Pulses/spaces shorter than this are filtered out by hardware. If
+ filters cannot be set independently for pulse/space, the corresponding
+ ioctls must return an error and LIRC_SET_REC_FILTER shall be used instead.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>LIRC_SET_MEASURE_CARRIER_MODE</term>
+ <listitem>
+ <para>Enable (1)/disable (0) measure mode. If enabled, from the next key
+ press on, the driver will send LIRC_MODE2_FREQUENCY packets. By default
+ this should be turned off.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>LIRC_SET_REC_{DUTY_CYCLE,CARRIER}_RANGE</term>
+ <listitem>
+ <para>To set a range use LIRC_SET_REC_DUTY_CYCLE_RANGE/LIRC_SET_REC_CARRIER_RANGE
+ with the lower bound first and later LIRC_SET_REC_DUTY_CYCLE/LIRC_SET_REC_CARRIER
+ with the upper bound.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>LIRC_NOTIFY_DECODE</term>
+ <listitem>
+ <para>This ioctl is called by lircd whenever a successful decoding of an
+ incoming IR signal could be done. This can be used by supporting hardware
+ to give visual feedback to the user e.g. by flashing a LED.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>LIRC_SETUP_{START,END}</term>
+ <listitem>
+ <para>Setting of several driver parameters can be optimized by encapsulating
+ the according ioctl calls with LIRC_SETUP_START/LIRC_SETUP_END. When a
+ driver receives a LIRC_SETUP_START ioctl it can choose to not commit
+ further setting changes to the hardware until a LIRC_SETUP_END is received.
+ But this is open to the driver implementation and every driver must also
+ handle parameter changes which are not encapsulated by LIRC_SETUP_START
+ and LIRC_SETUP_END. Drivers can also choose to ignore these ioctls.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>LIRC_SET_WIDEBAND_RECEIVER</term>
+ <listitem>
+ <para>Some receivers are equipped with special wide band receiver which is intended
+ to be used to learn output of existing remote.
+ Calling that ioctl with (1) will enable it, and with (0) disable it.
+ This might be useful of receivers that have otherwise narrow band receiver
+ that prevents them to be used with some remotes.
+ Wide band receiver might also be more precise
+ On the other hand its disadvantage it usually reduced range of reception.
+ Note: wide band receiver might be implictly enabled if you enable
+ carrier reports. In that case it will be disabled as soon as you disable
+ carrier reports. Trying to disable wide band receiver while carrier
+ reports are active will do nothing.</para>
+ </listitem>
+ </varlistentry>
+</variablelist>
+<section id="lirc_dev_errors">
+ &return-value;
+</section>
+</section>
+</section>
diff --git a/Documentation/DocBook/media/v4l/media-controller.xml b/Documentation/DocBook/media/v4l/media-controller.xml
new file mode 100644
index 000000000..873ac3a62
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/media-controller.xml
@@ -0,0 +1,89 @@
+<partinfo>
+ <authorgroup>
+ <author>
+ <firstname>Laurent</firstname>
+ <surname>Pinchart</surname>
+ <affiliation><address><email>laurent.pinchart@ideasonboard.com</email></address></affiliation>
+ <contrib>Initial version.</contrib>
+ </author>
+ </authorgroup>
+ <copyright>
+ <year>2010</year>
+ <holder>Laurent Pinchart</holder>
+ </copyright>
+
+ <revhistory>
+ <!-- Put document revisions here, newest first. -->
+ <revision>
+ <revnumber>1.0.0</revnumber>
+ <date>2010-11-10</date>
+ <authorinitials>lp</authorinitials>
+ <revremark>Initial revision</revremark>
+ </revision>
+ </revhistory>
+</partinfo>
+
+<title>Media Controller API</title>
+
+<chapter id="media_controller">
+ <title>Media Controller</title>
+
+ <section id="media-controller-intro">
+ <title>Introduction</title>
+ <para>Media devices increasingly handle multiple related functions. Many USB
+ cameras include microphones, video capture hardware can also output video,
+ or SoC camera interfaces also perform memory-to-memory operations similar to
+ video codecs.</para>
+ <para>Independent functions, even when implemented in the same hardware, can
+ be modelled as separate devices. A USB camera with a microphone will be
+ presented to userspace applications as V4L2 and ALSA capture devices. The
+ devices' relationships (when using a webcam, end-users shouldn't have to
+ manually select the associated USB microphone), while not made available
+ directly to applications by the drivers, can usually be retrieved from
+ sysfs.</para>
+ <para>With more and more advanced SoC devices being introduced, the current
+ approach will not scale. Device topologies are getting increasingly complex
+ and can't always be represented by a tree structure. Hardware blocks are
+ shared between different functions, creating dependencies between seemingly
+ unrelated devices.</para>
+ <para>Kernel abstraction APIs such as V4L2 and ALSA provide means for
+ applications to access hardware parameters. As newer hardware expose an
+ increasingly high number of those parameters, drivers need to guess what
+ applications really require based on limited information, thereby
+ implementing policies that belong to userspace.</para>
+ <para>The media controller API aims at solving those problems.</para>
+ </section>
+
+ <section id="media-controller-model">
+ <title>Media device model</title>
+ <para>Discovering a device internal topology, and configuring it at runtime,
+ is one of the goals of the media controller API. To achieve this, hardware
+ devices are modelled as an oriented graph of building blocks called entities
+ connected through pads.</para>
+ <para>An entity is a basic media hardware or software building block. It can
+ correspond to a large variety of logical blocks such as physical hardware
+ devices (CMOS sensor for instance), logical hardware devices (a building
+ block in a System-on-Chip image processing pipeline), DMA channels or
+ physical connectors.</para>
+ <para>A pad is a connection endpoint through which an entity can interact
+ with other entities. Data (not restricted to video) produced by an entity
+ flows from the entity's output to one or more entity inputs. Pads should not
+ be confused with physical pins at chip boundaries.</para>
+ <para>A link is a point-to-point oriented connection between two pads,
+ either on the same entity or on different entities. Data flows from a source
+ pad to a sink pad.</para>
+ </section>
+</chapter>
+
+<appendix id="media-user-func">
+ <title>Function Reference</title>
+ <!-- Keep this alphabetically sorted. -->
+ &sub-media-func-open;
+ &sub-media-func-close;
+ &sub-media-func-ioctl;
+ <!-- All ioctls go here. -->
+ &sub-media-ioc-device-info;
+ &sub-media-ioc-enum-entities;
+ &sub-media-ioc-enum-links;
+ &sub-media-ioc-setup-link;
+</appendix>
diff --git a/Documentation/DocBook/media/v4l/media-func-close.xml b/Documentation/DocBook/media/v4l/media-func-close.xml
new file mode 100644
index 000000000..be149c802
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/media-func-close.xml
@@ -0,0 +1,59 @@
+<refentry id="media-func-close">
+ <refmeta>
+ <refentrytitle>media close()</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>media-close</refname>
+ <refpurpose>Close a media device</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcsynopsisinfo>#include &lt;unistd.h&gt;</funcsynopsisinfo>
+ <funcprototype>
+ <funcdef>int <function>close</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>Closes the media device. Resources associated with the file descriptor
+ are freed. The device configuration remain unchanged.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>Return Value</title>
+
+ <para><function>close</function> returns 0 on success. On error, -1 is
+ returned, and <varname>errno</varname> is set appropriately. Possible error
+ codes are:</para>
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EBADF</errorcode></term>
+ <listitem>
+ <para><parameter>fd</parameter> is not a valid open file descriptor.
+ </para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/media-func-ioctl.xml b/Documentation/DocBook/media/v4l/media-func-ioctl.xml
new file mode 100644
index 000000000..39478d0fb
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/media-func-ioctl.xml
@@ -0,0 +1,73 @@
+<refentry id="media-func-ioctl">
+ <refmeta>
+ <refentrytitle>media ioctl()</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>media-ioctl</refname>
+ <refpurpose>Control a media device</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcsynopsisinfo>#include &lt;sys/ioctl.h&gt;</funcsynopsisinfo>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>void *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>Media ioctl request code as defined in the media.h header file,
+ for example MEDIA_IOC_SETUP_LINK.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para>Pointer to a request-specific structure.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+ <para>The <function>ioctl()</function> function manipulates media device
+ parameters. The argument <parameter>fd</parameter> must be an open file
+ descriptor.</para>
+ <para>The ioctl <parameter>request</parameter> code specifies the media
+ function to be called. It has encoded in it whether the argument is an
+ input, output or read/write parameter, and the size of the argument
+ <parameter>argp</parameter> in bytes.</para>
+ <para>Macros and structures definitions specifying media ioctl requests and
+ their parameters are located in the media.h header file. All media ioctl
+ requests, their respective function and parameters are specified in
+ <xref linkend="media-user-func" />.</para>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <para>Request-specific error codes are listed in the
+ individual requests descriptions.</para>
+ <para>When an ioctl that takes an output or read/write parameter fails,
+ the parameter remains unmodified.</para>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/media-func-open.xml b/Documentation/DocBook/media/v4l/media-func-open.xml
new file mode 100644
index 000000000..f7df034dc
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/media-func-open.xml
@@ -0,0 +1,94 @@
+<refentry id="media-func-open">
+ <refmeta>
+ <refentrytitle>media open()</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>media-open</refname>
+ <refpurpose>Open a media device</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcsynopsisinfo>#include &lt;fcntl.h&gt;</funcsynopsisinfo>
+ <funcprototype>
+ <funcdef>int <function>open</function></funcdef>
+ <paramdef>const char *<parameter>device_name</parameter></paramdef>
+ <paramdef>int <parameter>flags</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>device_name</parameter></term>
+ <listitem>
+ <para>Device to be opened.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>flags</parameter></term>
+ <listitem>
+ <para>Open flags. Access mode must be either <constant>O_RDONLY</constant>
+ or <constant>O_RDWR</constant>. Other flags have no effect.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+ <refsect1>
+ <title>Description</title>
+ <para>To open a media device applications call <function>open()</function>
+ with the desired device name. The function has no side effects; the device
+ configuration remain unchanged.</para>
+ <para>When the device is opened in read-only mode, attemps to modify its
+ configuration will result in an error, and <varname>errno</varname> will be
+ set to <errorcode>EBADF</errorcode>.</para>
+ </refsect1>
+ <refsect1>
+ <title>Return Value</title>
+
+ <para><function>open</function> returns the new file descriptor on success.
+ On error, -1 is returned, and <varname>errno</varname> is set appropriately.
+ Possible error codes are:</para>
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EACCES</errorcode></term>
+ <listitem>
+ <para>The requested access to the file is not allowed.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EMFILE</errorcode></term>
+ <listitem>
+ <para>The process already has the maximum number of files open.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>ENFILE</errorcode></term>
+ <listitem>
+ <para>The system limit on the total number of open files has been
+ reached.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>ENOMEM</errorcode></term>
+ <listitem>
+ <para>Insufficient kernel memory was available.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>ENXIO</errorcode></term>
+ <listitem>
+ <para>No device corresponding to this device special file exists.
+ </para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/media-ioc-device-info.xml b/Documentation/DocBook/media/v4l/media-ioc-device-info.xml
new file mode 100644
index 000000000..2ce521419
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/media-ioc-device-info.xml
@@ -0,0 +1,132 @@
+<refentry id="media-ioc-device-info">
+ <refmeta>
+ <refentrytitle>ioctl MEDIA_IOC_DEVICE_INFO</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>MEDIA_IOC_DEVICE_INFO</refname>
+ <refpurpose>Query device information</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct media_device_info *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>File descriptor returned by
+ <link linkend='media-func-open'><function>open()</function></link>.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>MEDIA_IOC_DEVICE_INFO</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>All media devices must support the <constant>MEDIA_IOC_DEVICE_INFO</constant>
+ ioctl. To query device information, applications call the ioctl with a
+ pointer to a &media-device-info;. The driver fills the structure and returns
+ the information to the application.
+ The ioctl never fails.</para>
+
+ <table pgwide="1" frame="none" id="media-device-info">
+ <title>struct <structname>media_device_info</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>char</entry>
+ <entry><structfield>driver</structfield>[16]</entry>
+ <entry><para>Name of the driver implementing the media API as a
+ NUL-terminated ASCII string. The driver version is stored in the
+ <structfield>driver_version</structfield> field.</para>
+ <para>Driver specific applications can use this information to
+ verify the driver identity. It is also useful to work around
+ known bugs, or to identify drivers in error reports.</para></entry>
+ </row>
+ <row>
+ <entry>char</entry>
+ <entry><structfield>model</structfield>[32]</entry>
+ <entry>Device model name as a NUL-terminated UTF-8 string. The
+ device version is stored in the <structfield>device_version</structfield>
+ field and is not be appended to the model name.</entry>
+ </row>
+ <row>
+ <entry>char</entry>
+ <entry><structfield>serial</structfield>[40]</entry>
+ <entry>Serial number as a NUL-terminated ASCII string.</entry>
+ </row>
+ <row>
+ <entry>char</entry>
+ <entry><structfield>bus_info</structfield>[32]</entry>
+ <entry>Location of the device in the system as a NUL-terminated
+ ASCII string. This includes the bus type name (PCI, USB, ...) and a
+ bus-specific identifier.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>media_version</structfield></entry>
+ <entry>Media API version, formatted with the
+ <constant>KERNEL_VERSION()</constant> macro.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>hw_revision</structfield></entry>
+ <entry>Hardware device revision in a driver-specific format.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>media_version</structfield></entry>
+ <entry>Media device driver version, formatted with the
+ <constant>KERNEL_VERSION()</constant> macro. Together with the
+ <structfield>driver</structfield> field this identifies a particular
+ driver.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved</structfield>[31]</entry>
+ <entry>Reserved for future extensions. Drivers and applications must
+ set this array to zero.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ <para>The <structfield>serial</structfield> and <structfield>bus_info</structfield>
+ fields can be used to distinguish between multiple instances of otherwise
+ identical hardware. The serial number takes precedence when provided and can
+ be assumed to be unique. If the serial number is an empty string, the
+ <structfield>bus_info</structfield> field can be used instead. The
+ <structfield>bus_info</structfield> field is guaranteed to be unique, but
+ can vary across reboots or device unplug/replug.</para>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/media-ioc-enum-entities.xml b/Documentation/DocBook/media/v4l/media-ioc-enum-entities.xml
new file mode 100644
index 000000000..5872f8bbf
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/media-ioc-enum-entities.xml
@@ -0,0 +1,280 @@
+<refentry id="media-ioc-enum-entities">
+ <refmeta>
+ <refentrytitle>ioctl MEDIA_IOC_ENUM_ENTITIES</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>MEDIA_IOC_ENUM_ENTITIES</refname>
+ <refpurpose>Enumerate entities and their properties</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct media_entity_desc *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>File descriptor returned by
+ <link linkend='media-func-open'><function>open()</function></link>.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>MEDIA_IOC_ENUM_ENTITIES</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+ <para>To query the attributes of an entity, applications set the id field
+ of a &media-entity-desc; structure and call the MEDIA_IOC_ENUM_ENTITIES
+ ioctl with a pointer to this structure. The driver fills the rest of the
+ structure or returns an &EINVAL; when the id is invalid.</para>
+ <para>Entities can be enumerated by or'ing the id with the
+ <constant>MEDIA_ENT_ID_FLAG_NEXT</constant> flag. The driver will return
+ information about the entity with the smallest id strictly larger than the
+ requested one ('next entity'), or the &EINVAL; if there is none.</para>
+ <para>Entity IDs can be non-contiguous. Applications must
+ <emphasis>not</emphasis> try to enumerate entities by calling
+ MEDIA_IOC_ENUM_ENTITIES with increasing id's until they get an error.</para>
+ <para>Two or more entities that share a common non-zero
+ <structfield>group_id</structfield> value are considered as logically
+ grouped. Groups are used to report
+ <itemizedlist>
+ <listitem><para>ALSA, VBI and video nodes that carry the same media
+ stream</para></listitem>
+ <listitem><para>lens and flash controllers associated with a sensor</para></listitem>
+ </itemizedlist>
+ </para>
+
+ <table pgwide="1" frame="none" id="media-entity-desc">
+ <title>struct <structname>media_entity_desc</structname></title>
+ <tgroup cols="5">
+ <colspec colname="c1" />
+ <colspec colname="c2" />
+ <colspec colname="c3" />
+ <colspec colname="c4" />
+ <colspec colname="c5" />
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>id</structfield></entry>
+ <entry></entry>
+ <entry></entry>
+ <entry>Entity id, set by the application. When the id is or'ed with
+ <constant>MEDIA_ENT_ID_FLAG_NEXT</constant>, the driver clears the
+ flag and returns the first entity with a larger id.</entry>
+ </row>
+ <row>
+ <entry>char</entry>
+ <entry><structfield>name</structfield>[32]</entry>
+ <entry></entry>
+ <entry></entry>
+ <entry>Entity name as an UTF-8 NULL-terminated string.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>type</structfield></entry>
+ <entry></entry>
+ <entry></entry>
+ <entry>Entity type, see <xref linkend="media-entity-type" /> for details.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>revision</structfield></entry>
+ <entry></entry>
+ <entry></entry>
+ <entry>Entity revision in a driver/hardware specific format.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>flags</structfield></entry>
+ <entry></entry>
+ <entry></entry>
+ <entry>Entity flags, see <xref linkend="media-entity-flag" /> for details.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>group_id</structfield></entry>
+ <entry></entry>
+ <entry></entry>
+ <entry>Entity group ID</entry>
+ </row>
+ <row>
+ <entry>__u16</entry>
+ <entry><structfield>pads</structfield></entry>
+ <entry></entry>
+ <entry></entry>
+ <entry>Number of pads</entry>
+ </row>
+ <row>
+ <entry>__u16</entry>
+ <entry><structfield>links</structfield></entry>
+ <entry></entry>
+ <entry></entry>
+ <entry>Total number of outbound links. Inbound links are not counted
+ in this field.</entry>
+ </row>
+ <row>
+ <entry>union</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>struct</entry>
+ <entry><structfield>dev</structfield></entry>
+ <entry></entry>
+ <entry>Valid for (sub-)devices that create a single device node.</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry>__u32</entry>
+ <entry><structfield>major</structfield></entry>
+ <entry>Device node major number.</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry>__u32</entry>
+ <entry><structfield>minor</structfield></entry>
+ <entry>Device node minor number.</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>__u8</entry>
+ <entry><structfield>raw</structfield>[184]</entry>
+ <entry></entry>
+ <entry></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table frame="none" pgwide="1" id="media-entity-type">
+ <title>Media entity types</title>
+ <tgroup cols="2">
+ <colspec colname="c1"/>
+ <colspec colname="c2"/>
+ <tbody valign="top">
+ <row>
+ <entry><constant>MEDIA_ENT_T_DEVNODE</constant></entry>
+ <entry>Unknown device node</entry>
+ </row>
+ <row>
+ <entry><constant>MEDIA_ENT_T_DEVNODE_V4L</constant></entry>
+ <entry>V4L video, radio or vbi device node</entry>
+ </row>
+ <row>
+ <entry><constant>MEDIA_ENT_T_DEVNODE_FB</constant></entry>
+ <entry>Frame buffer device node</entry>
+ </row>
+ <row>
+ <entry><constant>MEDIA_ENT_T_DEVNODE_ALSA</constant></entry>
+ <entry>ALSA card</entry>
+ </row>
+ <row>
+ <entry><constant>MEDIA_ENT_T_DEVNODE_DVB_FE</constant></entry>
+ <entry>DVB frontend devnode</entry>
+ </row>
+ <row>
+ <entry><constant>MEDIA_ENT_T_DEVNODE_DVB_DEMUX</constant></entry>
+ <entry>DVB demux devnode</entry>
+ </row>
+ <row>
+ <entry><constant>MEDIA_ENT_T_DEVNODE_DVB_DVR</constant></entry>
+ <entry>DVB DVR devnode</entry>
+ </row>
+ <row>
+ <entry><constant>MEDIA_ENT_T_DEVNODE_DVB_CA</constant></entry>
+ <entry>DVB CAM devnode</entry>
+ </row>
+ <row>
+ <entry><constant>MEDIA_ENT_T_DEVNODE_DVB_NET</constant></entry>
+ <entry>DVB network devnode</entry>
+ </row>
+ <row>
+ <entry><constant>MEDIA_ENT_T_V4L2_SUBDEV</constant></entry>
+ <entry>Unknown V4L sub-device</entry>
+ </row>
+ <row>
+ <entry><constant>MEDIA_ENT_T_V4L2_SUBDEV_SENSOR</constant></entry>
+ <entry>Video sensor</entry>
+ </row>
+ <row>
+ <entry><constant>MEDIA_ENT_T_V4L2_SUBDEV_FLASH</constant></entry>
+ <entry>Flash controller</entry>
+ </row>
+ <row>
+ <entry><constant>MEDIA_ENT_T_V4L2_SUBDEV_LENS</constant></entry>
+ <entry>Lens controller</entry>
+ </row>
+ <row>
+ <entry><constant>MEDIA_ENT_T_V4L2_SUBDEV_DECODER</constant></entry>
+ <entry>Video decoder, the basic function of the video decoder is to
+ accept analogue video from a wide variety of sources such as
+ broadcast, DVD players, cameras and video cassette recorders, in
+ either NTSC, PAL or HD format and still occasionally SECAM, separate
+ it into its component parts, luminance and chrominance, and output
+ it in some digital video standard, with appropriate embedded timing
+ signals.</entry>
+ </row>
+ <row>
+ <entry><constant>MEDIA_ENT_T_V4L2_SUBDEV_TUNER</constant></entry>
+ <entry>TV and/or radio tuner</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table frame="none" pgwide="1" id="media-entity-flag">
+ <title>Media entity flags</title>
+ <tgroup cols="2">
+ <colspec colname="c1"/>
+ <colspec colname="c2"/>
+ <tbody valign="top">
+ <row>
+ <entry><constant>MEDIA_ENT_FL_DEFAULT</constant></entry>
+ <entry>Default entity for its type. Used to discover the default
+ audio, VBI and video devices, the default camera sensor, ...</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The &media-entity-desc; <structfield>id</structfield> references
+ a non-existing entity.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/media-ioc-enum-links.xml b/Documentation/DocBook/media/v4l/media-ioc-enum-links.xml
new file mode 100644
index 000000000..74fb394ec
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/media-ioc-enum-links.xml
@@ -0,0 +1,216 @@
+<refentry id="media-ioc-enum-links">
+ <refmeta>
+ <refentrytitle>ioctl MEDIA_IOC_ENUM_LINKS</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>MEDIA_IOC_ENUM_LINKS</refname>
+ <refpurpose>Enumerate all pads and links for a given entity</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct media_links_enum *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>File descriptor returned by
+ <link linkend='media-func-open'><function>open()</function></link>.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>MEDIA_IOC_ENUM_LINKS</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>To enumerate pads and/or links for a given entity, applications set
+ the entity field of a &media-links-enum; structure and initialize the
+ &media-pad-desc; and &media-link-desc; structure arrays pointed by the
+ <structfield>pads</structfield> and <structfield>links</structfield> fields.
+ They then call the MEDIA_IOC_ENUM_LINKS ioctl with a pointer to this
+ structure.</para>
+ <para>If the <structfield>pads</structfield> field is not NULL, the driver
+ fills the <structfield>pads</structfield> array with information about the
+ entity's pads. The array must have enough room to store all the entity's
+ pads. The number of pads can be retrieved with the &MEDIA-IOC-ENUM-ENTITIES;
+ ioctl.</para>
+ <para>If the <structfield>links</structfield> field is not NULL, the driver
+ fills the <structfield>links</structfield> array with information about the
+ entity's outbound links. The array must have enough room to store all the
+ entity's outbound links. The number of outbound links can be retrieved with
+ the &MEDIA-IOC-ENUM-ENTITIES; ioctl.</para>
+ <para>Only forward links that originate at one of the entity's source pads
+ are returned during the enumeration process.</para>
+
+ <table pgwide="1" frame="none" id="media-links-enum">
+ <title>struct <structname>media_links_enum</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>entity</structfield></entry>
+ <entry>Entity id, set by the application.</entry>
+ </row>
+ <row>
+ <entry>&media-pad-desc;</entry>
+ <entry>*<structfield>pads</structfield></entry>
+ <entry>Pointer to a pads array allocated by the application. Ignored
+ if NULL.</entry>
+ </row>
+ <row>
+ <entry>&media-link-desc;</entry>
+ <entry>*<structfield>links</structfield></entry>
+ <entry>Pointer to a links array allocated by the application. Ignored
+ if NULL.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="media-pad-desc">
+ <title>struct <structname>media_pad_desc</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>entity</structfield></entry>
+ <entry>ID of the entity this pad belongs to.</entry>
+ </row>
+ <row>
+ <entry>__u16</entry>
+ <entry><structfield>index</structfield></entry>
+ <entry>0-based pad index.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>flags</structfield></entry>
+ <entry>Pad flags, see <xref linkend="media-pad-flag" /> for more details.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table frame="none" pgwide="1" id="media-pad-flag">
+ <title>Media pad flags</title>
+ <tgroup cols="2">
+ <colspec colname="c1"/>
+ <colspec colname="c2"/>
+ <tbody valign="top">
+ <row>
+ <entry><constant>MEDIA_PAD_FL_SINK</constant></entry>
+ <entry>Input pad, relative to the entity. Input pads sink data and
+ are targets of links.</entry>
+ </row>
+ <row>
+ <entry><constant>MEDIA_PAD_FL_SOURCE</constant></entry>
+ <entry>Output pad, relative to the entity. Output pads source data
+ and are origins of links.</entry>
+ </row>
+ <row>
+ <entry><constant>MEDIA_PAD_FL_MUST_CONNECT</constant></entry>
+ <entry>If this flag is set and the pad is linked to any other
+ pad, then at least one of those links must be enabled for the
+ entity to be able to stream. There could be temporary reasons
+ (e.g. device configuration dependent) for the pad to need
+ enabled links even when this flag isn't set; the absence of the
+ flag doesn't imply there is none.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="media-link-desc">
+ <title>struct <structname>media_link_desc</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>&media-pad-desc;</entry>
+ <entry><structfield>source</structfield></entry>
+ <entry>Pad at the origin of this link.</entry>
+ </row>
+ <row>
+ <entry>&media-pad-desc;</entry>
+ <entry><structfield>sink</structfield></entry>
+ <entry>Pad at the target of this link.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>flags</structfield></entry>
+ <entry>Link flags, see <xref linkend="media-link-flag" /> for more details.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table frame="none" pgwide="1" id="media-link-flag">
+ <title>Media link flags</title>
+ <tgroup cols="2">
+ <colspec colname="c1"/>
+ <colspec colname="c2"/>
+ <tbody valign="top">
+ <row>
+ <entry><constant>MEDIA_LNK_FL_ENABLED</constant></entry>
+ <entry>The link is enabled and can be used to transfer media data.
+ When two or more links target a sink pad, only one of them can be
+ enabled at a time.</entry>
+ </row>
+ <row>
+ <entry><constant>MEDIA_LNK_FL_IMMUTABLE</constant></entry>
+ <entry>The link enabled state can't be modified at runtime. An
+ immutable link is always enabled.</entry>
+ </row>
+ <row>
+ <entry><constant>MEDIA_LNK_FL_DYNAMIC</constant></entry>
+ <entry>The link enabled state can be modified during streaming. This
+ flag is set by drivers and is read-only for applications.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ <para>One and only one of <constant>MEDIA_PAD_FL_SINK</constant> and
+ <constant>MEDIA_PAD_FL_SOURCE</constant> must be set for every pad.</para>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The &media-links-enum; <structfield>id</structfield> references
+ a non-existing entity.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/media-ioc-setup-link.xml b/Documentation/DocBook/media/v4l/media-ioc-setup-link.xml
new file mode 100644
index 000000000..fc2e522ee
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/media-ioc-setup-link.xml
@@ -0,0 +1,84 @@
+<refentry id="media-ioc-setup-link">
+ <refmeta>
+ <refentrytitle>ioctl MEDIA_IOC_SETUP_LINK</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>MEDIA_IOC_SETUP_LINK</refname>
+ <refpurpose>Modify the properties of a link</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct media_link_desc *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>File descriptor returned by
+ <link linkend='media-func-open'><function>open()</function></link>.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>MEDIA_IOC_SETUP_LINK</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>To change link properties applications fill a &media-link-desc; with
+ link identification information (source and sink pad) and the new requested
+ link flags. They then call the MEDIA_IOC_SETUP_LINK ioctl with a pointer to
+ that structure.</para>
+ <para>The only configurable property is the <constant>ENABLED</constant>
+ link flag to enable/disable a link. Links marked with the
+ <constant>IMMUTABLE</constant> link flag can not be enabled or disabled.
+ </para>
+ <para>Link configuration has no side effect on other links. If an enabled
+ link at the sink pad prevents the link from being enabled, the driver
+ returns with an &EBUSY;.</para>
+ <para>Only links marked with the <constant>DYNAMIC</constant> link flag can
+ be enabled/disabled while streaming media data. Attempting to enable or
+ disable a streaming non-dynamic link will return an &EBUSY;.</para>
+ <para>If the specified link can't be found the driver returns with an
+ &EINVAL;.</para>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The &media-link-desc; references a non-existing link, or the
+ link is immutable and an attempt to modify its configuration was made.
+ </para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/pixfmt-grey.xml b/Documentation/DocBook/media/v4l/pixfmt-grey.xml
new file mode 100644
index 000000000..bee970d3f
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/pixfmt-grey.xml
@@ -0,0 +1,62 @@
+ <refentry id="V4L2-PIX-FMT-GREY">
+ <refmeta>
+ <refentrytitle>V4L2_PIX_FMT_GREY ('GREY')</refentrytitle>
+ &manvol;
+ </refmeta>
+ <refnamediv>
+ <refname><constant>V4L2_PIX_FMT_GREY</constant></refname>
+ <refpurpose>Grey-scale image</refpurpose>
+ </refnamediv>
+ <refsect1>
+ <title>Description</title>
+
+ <para>This is a grey-scale image. It is really a degenerate
+Y'CbCr format which simply contains no Cb or Cr data.</para>
+
+ <example>
+ <title><constant>V4L2_PIX_FMT_GREY</constant> 4 &times; 4
+pixel image</title>
+
+ <formalpara>
+ <title>Byte Order.</title>
+ <para>Each cell is one byte.
+ <informaltable frame="none">
+ <tgroup cols="5" align="center">
+ <colspec align="left" colwidth="2*" />
+ <tbody valign="top">
+ <row>
+ <entry>start&nbsp;+&nbsp;0:</entry>
+ <entry>Y'<subscript>00</subscript></entry>
+ <entry>Y'<subscript>01</subscript></entry>
+ <entry>Y'<subscript>02</subscript></entry>
+ <entry>Y'<subscript>03</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;4:</entry>
+ <entry>Y'<subscript>10</subscript></entry>
+ <entry>Y'<subscript>11</subscript></entry>
+ <entry>Y'<subscript>12</subscript></entry>
+ <entry>Y'<subscript>13</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;8:</entry>
+ <entry>Y'<subscript>20</subscript></entry>
+ <entry>Y'<subscript>21</subscript></entry>
+ <entry>Y'<subscript>22</subscript></entry>
+ <entry>Y'<subscript>23</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;12:</entry>
+ <entry>Y'<subscript>30</subscript></entry>
+ <entry>Y'<subscript>31</subscript></entry>
+ <entry>Y'<subscript>32</subscript></entry>
+ <entry>Y'<subscript>33</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+ </example>
+ </refsect1>
+ </refentry>
diff --git a/Documentation/DocBook/media/v4l/pixfmt-m420.xml b/Documentation/DocBook/media/v4l/pixfmt-m420.xml
new file mode 100644
index 000000000..aadae92c5
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/pixfmt-m420.xml
@@ -0,0 +1,139 @@
+ <refentry id="V4L2-PIX-FMT-M420">
+ <refmeta>
+ <refentrytitle>V4L2_PIX_FMT_M420 ('M420')</refentrytitle>
+ &manvol;
+ </refmeta>
+ <refnamediv>
+ <refname><constant>V4L2_PIX_FMT_M420</constant></refname>
+ <refpurpose>Format with &frac12; horizontal and vertical chroma
+ resolution, also known as YUV 4:2:0. Hybrid plane line-interleaved
+ layout.</refpurpose>
+ </refnamediv>
+ <refsect1>
+ <title>Description</title>
+
+ <para>M420 is a YUV format with &frac12; horizontal and vertical chroma
+ subsampling (YUV 4:2:0). Pixels are organized as interleaved luma and
+ chroma planes. Two lines of luma data are followed by one line of chroma
+ data.</para>
+ <para>The luma plane has one byte per pixel. The chroma plane contains
+ interleaved CbCr pixels subsampled by &frac12; in the horizontal and
+ vertical directions. Each CbCr pair belongs to four pixels. For example,
+Cb<subscript>0</subscript>/Cr<subscript>0</subscript> belongs to
+Y'<subscript>00</subscript>, Y'<subscript>01</subscript>,
+Y'<subscript>10</subscript>, Y'<subscript>11</subscript>.</para>
+
+ <para>All line lengths are identical: if the Y lines include pad bytes
+ so do the CbCr lines.</para>
+
+ <example>
+ <title><constant>V4L2_PIX_FMT_M420</constant> 4 &times; 4
+pixel image</title>
+
+ <formalpara>
+ <title>Byte Order.</title>
+ <para>Each cell is one byte.
+ <informaltable frame="none">
+ <tgroup cols="5" align="center">
+ <colspec align="left" colwidth="2*" />
+ <tbody valign="top">
+ <row>
+ <entry>start&nbsp;+&nbsp;0:</entry>
+ <entry>Y'<subscript>00</subscript></entry>
+ <entry>Y'<subscript>01</subscript></entry>
+ <entry>Y'<subscript>02</subscript></entry>
+ <entry>Y'<subscript>03</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;4:</entry>
+ <entry>Y'<subscript>10</subscript></entry>
+ <entry>Y'<subscript>11</subscript></entry>
+ <entry>Y'<subscript>12</subscript></entry>
+ <entry>Y'<subscript>13</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;8:</entry>
+ <entry>Cb<subscript>00</subscript></entry>
+ <entry>Cr<subscript>00</subscript></entry>
+ <entry>Cb<subscript>01</subscript></entry>
+ <entry>Cr<subscript>01</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;16:</entry>
+ <entry>Y'<subscript>20</subscript></entry>
+ <entry>Y'<subscript>21</subscript></entry>
+ <entry>Y'<subscript>22</subscript></entry>
+ <entry>Y'<subscript>23</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;20:</entry>
+ <entry>Y'<subscript>30</subscript></entry>
+ <entry>Y'<subscript>31</subscript></entry>
+ <entry>Y'<subscript>32</subscript></entry>
+ <entry>Y'<subscript>33</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;24:</entry>
+ <entry>Cb<subscript>10</subscript></entry>
+ <entry>Cr<subscript>10</subscript></entry>
+ <entry>Cb<subscript>11</subscript></entry>
+ <entry>Cr<subscript>11</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+
+ <formalpara>
+ <title>Color Sample Location.</title>
+ <para>
+ <informaltable frame="none">
+ <tgroup cols="7" align="center">
+ <tbody valign="top">
+ <row>
+ <entry></entry>
+ <entry>0</entry><entry></entry><entry>1</entry><entry></entry>
+ <entry>2</entry><entry></entry><entry>3</entry>
+ </row>
+ <row>
+ <entry>0</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry><entry>C</entry><entry></entry><entry></entry>
+ <entry></entry><entry>C</entry><entry></entry>
+ </row>
+ <row>
+ <entry>1</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry></entry>
+ </row>
+ <row>
+ <entry>2</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry><entry>C</entry><entry></entry><entry></entry>
+ <entry></entry><entry>C</entry><entry></entry>
+ </row>
+ <row>
+ <entry>3</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+ </example>
+ </refsect1>
+ </refentry>
diff --git a/Documentation/DocBook/media/v4l/pixfmt-nv12.xml b/Documentation/DocBook/media/v4l/pixfmt-nv12.xml
new file mode 100644
index 000000000..84dd4fd7c
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/pixfmt-nv12.xml
@@ -0,0 +1,143 @@
+ <refentry>
+ <refmeta>
+ <refentrytitle>V4L2_PIX_FMT_NV12 ('NV12'), V4L2_PIX_FMT_NV21 ('NV21')</refentrytitle>
+ &manvol;
+ </refmeta>
+ <refnamediv>
+ <refname id="V4L2-PIX-FMT-NV12"><constant>V4L2_PIX_FMT_NV12</constant></refname>
+ <refname id="V4L2-PIX-FMT-NV21"><constant>V4L2_PIX_FMT_NV21</constant></refname>
+ <refpurpose>Formats with &frac12; horizontal and vertical
+chroma resolution, also known as YUV 4:2:0. One luminance and one
+chrominance plane with alternating chroma samples as opposed to
+<constant>V4L2_PIX_FMT_YVU420</constant></refpurpose>
+ </refnamediv>
+ <refsect1>
+ <title>Description</title>
+
+ <para>These are two-plane versions of the YUV 4:2:0 format.
+The three components are separated into two sub-images or planes. The
+Y plane is first. The Y plane has one byte per pixel. For
+<constant>V4L2_PIX_FMT_NV12</constant>, a combined CbCr plane
+immediately follows the Y plane in memory. The CbCr plane is the same
+width, in bytes, as the Y plane (and of the image), but is half as
+tall in pixels. Each CbCr pair belongs to four pixels. For example,
+Cb<subscript>0</subscript>/Cr<subscript>0</subscript> belongs to
+Y'<subscript>00</subscript>, Y'<subscript>01</subscript>,
+Y'<subscript>10</subscript>, Y'<subscript>11</subscript>.
+<constant>V4L2_PIX_FMT_NV21</constant> is the same except the Cb and
+Cr bytes are swapped, the CrCb plane starts with a Cr byte.</para>
+
+ <para>If the Y plane has pad bytes after each row, then the
+CbCr plane has as many pad bytes after its rows.</para>
+
+ <example>
+ <title><constant>V4L2_PIX_FMT_NV12</constant> 4 &times; 4
+pixel image</title>
+
+ <formalpara>
+ <title>Byte Order.</title>
+ <para>Each cell is one byte.
+ <informaltable frame="none">
+ <tgroup cols="5" align="center">
+ <colspec align="left" colwidth="2*" />
+ <tbody valign="top">
+ <row>
+ <entry>start&nbsp;+&nbsp;0:</entry>
+ <entry>Y'<subscript>00</subscript></entry>
+ <entry>Y'<subscript>01</subscript></entry>
+ <entry>Y'<subscript>02</subscript></entry>
+ <entry>Y'<subscript>03</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;4:</entry>
+ <entry>Y'<subscript>10</subscript></entry>
+ <entry>Y'<subscript>11</subscript></entry>
+ <entry>Y'<subscript>12</subscript></entry>
+ <entry>Y'<subscript>13</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;8:</entry>
+ <entry>Y'<subscript>20</subscript></entry>
+ <entry>Y'<subscript>21</subscript></entry>
+ <entry>Y'<subscript>22</subscript></entry>
+ <entry>Y'<subscript>23</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;12:</entry>
+ <entry>Y'<subscript>30</subscript></entry>
+ <entry>Y'<subscript>31</subscript></entry>
+ <entry>Y'<subscript>32</subscript></entry>
+ <entry>Y'<subscript>33</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;16:</entry>
+ <entry>Cb<subscript>00</subscript></entry>
+ <entry>Cr<subscript>00</subscript></entry>
+ <entry>Cb<subscript>01</subscript></entry>
+ <entry>Cr<subscript>01</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;20:</entry>
+ <entry>Cb<subscript>10</subscript></entry>
+ <entry>Cr<subscript>10</subscript></entry>
+ <entry>Cb<subscript>11</subscript></entry>
+ <entry>Cr<subscript>11</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+
+ <formalpara>
+ <title>Color Sample Location.</title>
+ <para>
+ <informaltable frame="none">
+ <tgroup cols="7" align="center">
+ <tbody valign="top">
+ <row>
+ <entry></entry>
+ <entry>0</entry><entry></entry><entry>1</entry><entry></entry>
+ <entry>2</entry><entry></entry><entry>3</entry>
+ </row>
+ <row>
+ <entry>0</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry><entry>C</entry><entry></entry><entry></entry>
+ <entry></entry><entry>C</entry><entry></entry>
+ </row>
+ <row>
+ <entry>1</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry></entry>
+ </row>
+ <row>
+ <entry>2</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry><entry>C</entry><entry></entry><entry></entry>
+ <entry></entry><entry>C</entry><entry></entry>
+ </row>
+ <row>
+ <entry>3</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+ </example>
+ </refsect1>
+ </refentry>
diff --git a/Documentation/DocBook/media/v4l/pixfmt-nv12m.xml b/Documentation/DocBook/media/v4l/pixfmt-nv12m.xml
new file mode 100644
index 000000000..f3a3d459f
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/pixfmt-nv12m.xml
@@ -0,0 +1,153 @@
+ <refentry>
+ <refmeta>
+ <refentrytitle>V4L2_PIX_FMT_NV12M ('NM12'), V4L2_PIX_FMT_NV21M ('NM21'), V4L2_PIX_FMT_NV12MT_16X16</refentrytitle>
+ &manvol;
+ </refmeta>
+ <refnamediv>
+ <refname id="V4L2-PIX-FMT-NV12M"><constant>V4L2_PIX_FMT_NV12M</constant></refname>
+ <refname id="V4L2-PIX-FMT-NV21M"><constant>V4L2_PIX_FMT_NV21M</constant></refname>
+ <refname id="V4L2-PIX-FMT-NV12MT-16X16"><constant>V4L2_PIX_FMT_NV12MT_16X16</constant></refname>
+ <refpurpose>Variation of <constant>V4L2_PIX_FMT_NV12</constant> and <constant>V4L2_PIX_FMT_NV21</constant> with planes
+ non contiguous in memory. </refpurpose>
+ </refnamediv>
+ <refsect1>
+ <title>Description</title>
+
+ <para>This is a multi-planar, two-plane version of the YUV 4:2:0 format.
+The three components are separated into two sub-images or planes.
+<constant>V4L2_PIX_FMT_NV12M</constant> differs from <constant>V4L2_PIX_FMT_NV12
+</constant> in that the two planes are non-contiguous in memory, i.e. the chroma
+plane do not necessarily immediately follows the luma plane.
+The luminance data occupies the first plane. The Y plane has one byte per pixel.
+In the second plane there is a chrominance data with alternating chroma samples.
+The CbCr plane is the same width, in bytes, as the Y plane (and of the image),
+but is half as tall in pixels. Each CbCr pair belongs to four pixels. For example,
+Cb<subscript>0</subscript>/Cr<subscript>0</subscript> belongs to
+Y'<subscript>00</subscript>, Y'<subscript>01</subscript>,
+Y'<subscript>10</subscript>, Y'<subscript>11</subscript>.
+<constant>V4L2_PIX_FMT_NV12MT_16X16</constant> is the tiled version of
+<constant>V4L2_PIX_FMT_NV12M</constant> with 16x16 macroblock tiles. Here pixels
+are arranged in 16x16 2D tiles and tiles are arranged in linear order in memory.
+<constant>V4L2_PIX_FMT_NV21M</constant> is the same as <constant>V4L2_PIX_FMT_NV12M</constant>
+except the Cb and Cr bytes are swapped, the CrCb plane starts with a Cr byte.</para>
+
+ <para><constant>V4L2_PIX_FMT_NV12M</constant> is intended to be
+used only in drivers and applications that support the multi-planar API,
+described in <xref linkend="planar-apis"/>. </para>
+
+ <para>If the Y plane has pad bytes after each row, then the
+CbCr plane has as many pad bytes after its rows.</para>
+
+ <example>
+ <title><constant>V4L2_PIX_FMT_NV12M</constant> 4 &times; 4 pixel image</title>
+
+ <formalpara>
+ <title>Byte Order.</title>
+ <para>Each cell is one byte.
+ <informaltable frame="none">
+ <tgroup cols="5" align="center">
+ <colspec align="left" colwidth="2*" />
+ <tbody valign="top">
+ <row>
+ <entry>start0&nbsp;+&nbsp;0:</entry>
+ <entry>Y'<subscript>00</subscript></entry>
+ <entry>Y'<subscript>01</subscript></entry>
+ <entry>Y'<subscript>02</subscript></entry>
+ <entry>Y'<subscript>03</subscript></entry>
+ </row>
+ <row>
+ <entry>start0&nbsp;+&nbsp;4:</entry>
+ <entry>Y'<subscript>10</subscript></entry>
+ <entry>Y'<subscript>11</subscript></entry>
+ <entry>Y'<subscript>12</subscript></entry>
+ <entry>Y'<subscript>13</subscript></entry>
+ </row>
+ <row>
+ <entry>start0&nbsp;+&nbsp;8:</entry>
+ <entry>Y'<subscript>20</subscript></entry>
+ <entry>Y'<subscript>21</subscript></entry>
+ <entry>Y'<subscript>22</subscript></entry>
+ <entry>Y'<subscript>23</subscript></entry>
+ </row>
+ <row>
+ <entry>start0&nbsp;+&nbsp;12:</entry>
+ <entry>Y'<subscript>30</subscript></entry>
+ <entry>Y'<subscript>31</subscript></entry>
+ <entry>Y'<subscript>32</subscript></entry>
+ <entry>Y'<subscript>33</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ </row>
+ <row>
+ <entry>start1&nbsp;+&nbsp;0:</entry>
+ <entry>Cb<subscript>00</subscript></entry>
+ <entry>Cr<subscript>00</subscript></entry>
+ <entry>Cb<subscript>01</subscript></entry>
+ <entry>Cr<subscript>01</subscript></entry>
+ </row>
+ <row>
+ <entry>start1&nbsp;+&nbsp;4:</entry>
+ <entry>Cb<subscript>10</subscript></entry>
+ <entry>Cr<subscript>10</subscript></entry>
+ <entry>Cb<subscript>11</subscript></entry>
+ <entry>Cr<subscript>11</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+
+ <formalpara>
+ <title>Color Sample Location.</title>
+ <para>
+ <informaltable frame="none">
+ <tgroup cols="7" align="center">
+ <tbody valign="top">
+ <row>
+ <entry></entry>
+ <entry>0</entry><entry></entry><entry>1</entry><entry></entry>
+ <entry>2</entry><entry></entry><entry>3</entry>
+ </row>
+ <row>
+ <entry>0</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry><entry>C</entry><entry></entry><entry></entry>
+ <entry></entry><entry>C</entry><entry></entry>
+ </row>
+ <row>
+ <entry>1</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry></entry>
+ </row>
+ <row>
+ <entry>2</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry><entry>C</entry><entry></entry><entry></entry>
+ <entry></entry><entry>C</entry><entry></entry>
+ </row>
+ <row>
+ <entry>3</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+ </example>
+ </refsect1>
+ </refentry>
diff --git a/Documentation/DocBook/media/v4l/pixfmt-nv12mt.xml b/Documentation/DocBook/media/v4l/pixfmt-nv12mt.xml
new file mode 100644
index 000000000..8a70a1707
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/pixfmt-nv12mt.xml
@@ -0,0 +1,66 @@
+ <refentry>
+ <refmeta>
+ <refentrytitle>V4L2_PIX_FMT_NV12MT ('TM12')</refentrytitle>
+ &manvol;
+ </refmeta>
+ <refnamediv>
+ <refname id="V4L2-PIX-FMT-NV12MT"><constant>V4L2_PIX_FMT_NV12MT
+</constant></refname>
+ <refpurpose>Formats with &frac12; horizontal and vertical
+chroma resolution. This format has two planes - one for luminance and one for
+chrominance. Chroma samples are interleaved. The difference to
+<constant>V4L2_PIX_FMT_NV12</constant> is the memory layout. Pixels are
+grouped in macroblocks of 64x32 size. The order of macroblocks in memory is
+also not standard.
+ </refpurpose>
+ </refnamediv>
+ <refsect1>
+ <title>Description</title>
+
+ <para>This is the two-plane versions of the YUV 4:2:0 format where data
+is grouped into 64x32 macroblocks. The three components are separated into two
+sub-images or planes. The Y plane has one byte per pixel and pixels are grouped
+into 64x32 macroblocks. The CbCr plane has the same width, in bytes, as the Y
+plane (and the image), but is half as tall in pixels. The chroma plane is also
+grouped into 64x32 macroblocks.</para>
+ <para>Width of the buffer has to be aligned to the multiple of 128, and
+height alignment is 32. Every four adjacent buffers - two horizontally and two
+vertically are grouped together and are located in memory in Z or flipped Z
+order. </para>
+ <para>Layout of macroblocks in memory is presented in the following
+figure.</para>
+ <para><figure id="nv12mt">
+ <title><constant>V4L2_PIX_FMT_NV12MT</constant> macroblock Z shape
+memory layout</title>
+ <mediaobject>
+ <imageobject>
+ <imagedata fileref="nv12mt.gif" format="GIF" />
+ </imageobject>
+ </mediaobject>
+ </figure>
+ The requirement that width is multiple of 128 is implemented because,
+the Z shape cannot be cut in half horizontally. In case the vertical resolution
+of macroblocks is odd then the last row of macroblocks is arranged in a linear
+order. </para>
+ <para>In case of chroma the layout is identical. Cb and Cr samples are
+interleaved. Height of the buffer is aligned to 32.
+ </para>
+ <example>
+ <title>Memory layout of macroblocks in <constant>V4L2_PIX_FMT_NV12
+</constant> format pixel image - extreme case</title>
+ <para>
+ <figure id="nv12mt_ex">
+ <title>Example <constant>V4L2_PIX_FMT_NV12MT</constant> memory
+layout of macroblocks</title>
+ <mediaobject>
+ <imageobject>
+ <imagedata fileref="nv12mt_example.gif" format="GIF" />
+ </imageobject>
+ </mediaobject>
+ </figure>
+ Memory layout of macroblocks of <constant>V4L2_PIX_FMT_NV12MT
+</constant> format in most extreme case.
+ </para>
+ </example>
+ </refsect1>
+ </refentry>
diff --git a/Documentation/DocBook/media/v4l/pixfmt-nv16.xml b/Documentation/DocBook/media/v4l/pixfmt-nv16.xml
new file mode 100644
index 000000000..8ae1f8a81
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/pixfmt-nv16.xml
@@ -0,0 +1,166 @@
+ <refentry>
+ <refmeta>
+ <refentrytitle>V4L2_PIX_FMT_NV16 ('NV16'), V4L2_PIX_FMT_NV61 ('NV61')</refentrytitle>
+ &manvol;
+ </refmeta>
+ <refnamediv>
+ <refname id="V4L2-PIX-FMT-NV16"><constant>V4L2_PIX_FMT_NV16</constant></refname>
+ <refname id="V4L2-PIX-FMT-NV61"><constant>V4L2_PIX_FMT_NV61</constant></refname>
+ <refpurpose>Formats with &frac12; horizontal
+chroma resolution, also known as YUV 4:2:2. One luminance and one
+chrominance plane with alternating chroma samples as opposed to
+<constant>V4L2_PIX_FMT_YVU420</constant></refpurpose>
+ </refnamediv>
+ <refsect1>
+ <title>Description</title>
+
+ <para>These are two-plane versions of the YUV 4:2:2 format.
+The three components are separated into two sub-images or planes. The
+Y plane is first. The Y plane has one byte per pixel. For
+<constant>V4L2_PIX_FMT_NV16</constant>, a combined CbCr plane
+immediately follows the Y plane in memory. The CbCr plane is the same
+width and height, in bytes, as the Y plane (and of the image).
+Each CbCr pair belongs to two pixels. For example,
+Cb<subscript>0</subscript>/Cr<subscript>0</subscript> belongs to
+Y'<subscript>00</subscript>, Y'<subscript>01</subscript>.
+<constant>V4L2_PIX_FMT_NV61</constant> is the same except the Cb and
+Cr bytes are swapped, the CrCb plane starts with a Cr byte.</para>
+
+ <para>If the Y plane has pad bytes after each row, then the
+CbCr plane has as many pad bytes after its rows.</para>
+
+ <example>
+ <title><constant>V4L2_PIX_FMT_NV16</constant> 4 &times; 4
+pixel image</title>
+
+ <formalpara>
+ <title>Byte Order.</title>
+ <para>Each cell is one byte.
+ <informaltable frame="none">
+ <tgroup cols="5" align="center">
+ <colspec align="left" colwidth="2*" />
+ <tbody valign="top">
+ <row>
+ <entry>start&nbsp;+&nbsp;0:</entry>
+ <entry>Y'<subscript>00</subscript></entry>
+ <entry>Y'<subscript>01</subscript></entry>
+ <entry>Y'<subscript>02</subscript></entry>
+ <entry>Y'<subscript>03</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;4:</entry>
+ <entry>Y'<subscript>10</subscript></entry>
+ <entry>Y'<subscript>11</subscript></entry>
+ <entry>Y'<subscript>12</subscript></entry>
+ <entry>Y'<subscript>13</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;8:</entry>
+ <entry>Y'<subscript>20</subscript></entry>
+ <entry>Y'<subscript>21</subscript></entry>
+ <entry>Y'<subscript>22</subscript></entry>
+ <entry>Y'<subscript>23</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;12:</entry>
+ <entry>Y'<subscript>30</subscript></entry>
+ <entry>Y'<subscript>31</subscript></entry>
+ <entry>Y'<subscript>32</subscript></entry>
+ <entry>Y'<subscript>33</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;16:</entry>
+ <entry>Cb<subscript>00</subscript></entry>
+ <entry>Cr<subscript>00</subscript></entry>
+ <entry>Cb<subscript>01</subscript></entry>
+ <entry>Cr<subscript>01</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;20:</entry>
+ <entry>Cb<subscript>10</subscript></entry>
+ <entry>Cr<subscript>10</subscript></entry>
+ <entry>Cb<subscript>11</subscript></entry>
+ <entry>Cr<subscript>11</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;24:</entry>
+ <entry>Cb<subscript>20</subscript></entry>
+ <entry>Cr<subscript>20</subscript></entry>
+ <entry>Cb<subscript>21</subscript></entry>
+ <entry>Cr<subscript>21</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;28:</entry>
+ <entry>Cb<subscript>30</subscript></entry>
+ <entry>Cr<subscript>30</subscript></entry>
+ <entry>Cb<subscript>31</subscript></entry>
+ <entry>Cr<subscript>31</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+
+ <formalpara>
+ <title>Color Sample Location.</title>
+ <para>
+ <informaltable frame="none">
+ <tgroup cols="7" align="center">
+ <tbody valign="top">
+ <row>
+ <entry></entry>
+ <entry>0</entry><entry></entry><entry>1</entry><entry></entry>
+ <entry>2</entry><entry></entry><entry>3</entry>
+ </row>
+ <row>
+ <entry>0</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry><entry>C</entry><entry></entry><entry></entry>
+ <entry></entry><entry>C</entry><entry></entry>
+ </row>
+ <row>
+ <entry>1</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry><entry>C</entry><entry></entry><entry></entry>
+ <entry></entry><entry>C</entry><entry></entry>
+ </row>
+ <row>
+ <entry></entry>
+ </row>
+ <row>
+ <entry>2</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry><entry>C</entry><entry></entry><entry></entry>
+ <entry></entry><entry>C</entry><entry></entry>
+ </row>
+ <row>
+ <entry>3</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry><entry>C</entry><entry></entry><entry></entry>
+ <entry></entry><entry>C</entry><entry></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+ </example>
+ </refsect1>
+ </refentry>
diff --git a/Documentation/DocBook/media/v4l/pixfmt-nv16m.xml b/Documentation/DocBook/media/v4l/pixfmt-nv16m.xml
new file mode 100644
index 000000000..fb2b5e35d
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/pixfmt-nv16m.xml
@@ -0,0 +1,170 @@
+ <refentry>
+ <refmeta>
+ <refentrytitle>V4L2_PIX_FMT_NV16M ('NM16'), V4L2_PIX_FMT_NV61M ('NM61')</refentrytitle>
+ &manvol;
+ </refmeta>
+ <refnamediv>
+ <refname id="V4L2-PIX-FMT-NV16M"><constant>V4L2_PIX_FMT_NV16M</constant></refname>
+ <refname id="V4L2-PIX-FMT-NV61M"><constant>V4L2_PIX_FMT_NV61M</constant></refname>
+ <refpurpose>Variation of <constant>V4L2_PIX_FMT_NV16</constant> and <constant>V4L2_PIX_FMT_NV61</constant> with planes
+ non contiguous in memory. </refpurpose>
+ </refnamediv>
+ <refsect1>
+ <title>Description</title>
+
+ <para>This is a multi-planar, two-plane version of the YUV 4:2:2 format.
+The three components are separated into two sub-images or planes.
+<constant>V4L2_PIX_FMT_NV16M</constant> differs from <constant>V4L2_PIX_FMT_NV16
+</constant> in that the two planes are non-contiguous in memory, i.e. the chroma
+plane does not necessarily immediately follow the luma plane.
+The luminance data occupies the first plane. The Y plane has one byte per pixel.
+In the second plane there is chrominance data with alternating chroma samples.
+The CbCr plane is the same width and height, in bytes, as the Y plane.
+Each CbCr pair belongs to two pixels. For example,
+Cb<subscript>0</subscript>/Cr<subscript>0</subscript> belongs to
+Y'<subscript>00</subscript>, Y'<subscript>01</subscript>.
+<constant>V4L2_PIX_FMT_NV61M</constant> is the same as <constant>V4L2_PIX_FMT_NV16M</constant>
+except the Cb and Cr bytes are swapped, the CrCb plane starts with a Cr byte.</para>
+
+ <para><constant>V4L2_PIX_FMT_NV16M</constant> and
+<constant>V4L2_PIX_FMT_NV61M</constant> are intended to be used only in drivers
+and applications that support the multi-planar API, described in
+<xref linkend="planar-apis"/>. </para>
+
+ <example>
+ <title><constant>V4L2_PIX_FMT_NV16M</constant> 4 &times; 4 pixel image</title>
+
+ <formalpara>
+ <title>Byte Order.</title>
+ <para>Each cell is one byte.
+ <informaltable frame="none">
+ <tgroup cols="5" align="center">
+ <colspec align="left" colwidth="2*" />
+ <tbody valign="top">
+ <row>
+ <entry>start0&nbsp;+&nbsp;0:</entry>
+ <entry>Y'<subscript>00</subscript></entry>
+ <entry>Y'<subscript>01</subscript></entry>
+ <entry>Y'<subscript>02</subscript></entry>
+ <entry>Y'<subscript>03</subscript></entry>
+ </row>
+ <row>
+ <entry>start0&nbsp;+&nbsp;4:</entry>
+ <entry>Y'<subscript>10</subscript></entry>
+ <entry>Y'<subscript>11</subscript></entry>
+ <entry>Y'<subscript>12</subscript></entry>
+ <entry>Y'<subscript>13</subscript></entry>
+ </row>
+ <row>
+ <entry>start0&nbsp;+&nbsp;8:</entry>
+ <entry>Y'<subscript>20</subscript></entry>
+ <entry>Y'<subscript>21</subscript></entry>
+ <entry>Y'<subscript>22</subscript></entry>
+ <entry>Y'<subscript>23</subscript></entry>
+ </row>
+ <row>
+ <entry>start0&nbsp;+&nbsp;12:</entry>
+ <entry>Y'<subscript>30</subscript></entry>
+ <entry>Y'<subscript>31</subscript></entry>
+ <entry>Y'<subscript>32</subscript></entry>
+ <entry>Y'<subscript>33</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ </row>
+ <row>
+ <entry>start1&nbsp;+&nbsp;0:</entry>
+ <entry>Cb<subscript>00</subscript></entry>
+ <entry>Cr<subscript>00</subscript></entry>
+ <entry>Cb<subscript>02</subscript></entry>
+ <entry>Cr<subscript>02</subscript></entry>
+ </row>
+ <row>
+ <entry>start1&nbsp;+&nbsp;4:</entry>
+ <entry>Cb<subscript>10</subscript></entry>
+ <entry>Cr<subscript>10</subscript></entry>
+ <entry>Cb<subscript>12</subscript></entry>
+ <entry>Cr<subscript>12</subscript></entry>
+ </row>
+ <row>
+ <entry>start1&nbsp;+&nbsp;8:</entry>
+ <entry>Cb<subscript>20</subscript></entry>
+ <entry>Cr<subscript>20</subscript></entry>
+ <entry>Cb<subscript>22</subscript></entry>
+ <entry>Cr<subscript>22</subscript></entry>
+ </row>
+ <row>
+ <entry>start1&nbsp;+&nbsp;12:</entry>
+ <entry>Cb<subscript>30</subscript></entry>
+ <entry>Cr<subscript>30</subscript></entry>
+ <entry>Cb<subscript>32</subscript></entry>
+ <entry>Cr<subscript>32</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+
+ <formalpara>
+ <title>Color Sample Location.</title>
+ <para>
+ <informaltable frame="none">
+ <tgroup cols="7" align="center">
+ <tbody valign="top">
+ <row>
+ <entry></entry>
+ <entry>0</entry><entry></entry><entry>1</entry><entry></entry>
+ <entry>2</entry><entry></entry><entry>3</entry>
+ </row>
+ <row>
+ <entry>0</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry><entry>C</entry><entry></entry><entry></entry>
+ <entry></entry><entry>C</entry><entry></entry>
+ </row>
+ <row>
+ <entry>1</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry><entry>C</entry><entry></entry><entry></entry>
+ <entry></entry><entry>C</entry><entry></entry>
+ </row>
+ <row>
+ <entry></entry>
+ </row>
+ <row>
+ <entry>2</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry><entry>C</entry><entry></entry><entry></entry>
+ <entry></entry><entry>C</entry><entry></entry>
+ </row>
+ <row>
+ <entry>3</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry><entry>C</entry><entry></entry><entry></entry>
+ <entry></entry><entry>C</entry><entry></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+ </example>
+ </refsect1>
+ </refentry>
diff --git a/Documentation/DocBook/media/v4l/pixfmt-nv24.xml b/Documentation/DocBook/media/v4l/pixfmt-nv24.xml
new file mode 100644
index 000000000..fb255f2ca
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/pixfmt-nv24.xml
@@ -0,0 +1,121 @@
+ <refentry>
+ <refmeta>
+ <refentrytitle>V4L2_PIX_FMT_NV24 ('NV24'), V4L2_PIX_FMT_NV42 ('NV42')</refentrytitle>
+ &manvol;
+ </refmeta>
+ <refnamediv>
+ <refname id="V4L2-PIX-FMT-NV24"><constant>V4L2_PIX_FMT_NV24</constant></refname>
+ <refname id="V4L2-PIX-FMT-NV42"><constant>V4L2_PIX_FMT_NV42</constant></refname>
+ <refpurpose>Formats with full horizontal and vertical
+chroma resolutions, also known as YUV 4:4:4. One luminance and one
+chrominance plane with alternating chroma samples as opposed to
+<constant>V4L2_PIX_FMT_YVU420</constant></refpurpose>
+ </refnamediv>
+ <refsect1>
+ <title>Description</title>
+
+ <para>These are two-plane versions of the YUV 4:4:4 format. The three
+ components are separated into two sub-images or planes. The Y plane is
+ first, with each Y sample stored in one byte per pixel. For
+ <constant>V4L2_PIX_FMT_NV24</constant>, a combined CbCr plane
+ immediately follows the Y plane in memory. The CbCr plane has the same
+ width and height, in pixels, as the Y plane (and the image). Each line
+ contains one CbCr pair per pixel, with each Cb and Cr sample stored in
+ one byte. <constant>V4L2_PIX_FMT_NV42</constant> is the same except that
+ the Cb and Cr samples are swapped, the CrCb plane starts with a Cr
+ sample.</para>
+
+ <para>If the Y plane has pad bytes after each row, then the CbCr plane
+ has twice as many pad bytes after its rows.</para>
+
+ <example>
+ <title><constant>V4L2_PIX_FMT_NV24</constant> 4 &times; 4
+pixel image</title>
+
+ <formalpara>
+ <title>Byte Order.</title>
+ <para>Each cell is one byte.
+ <informaltable frame="none">
+ <tgroup cols="9" align="center">
+ <colspec align="left" colwidth="2*" />
+ <tbody valign="top">
+ <row>
+ <entry>start&nbsp;+&nbsp;0:</entry>
+ <entry>Y'<subscript>00</subscript></entry>
+ <entry>Y'<subscript>01</subscript></entry>
+ <entry>Y'<subscript>02</subscript></entry>
+ <entry>Y'<subscript>03</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;4:</entry>
+ <entry>Y'<subscript>10</subscript></entry>
+ <entry>Y'<subscript>11</subscript></entry>
+ <entry>Y'<subscript>12</subscript></entry>
+ <entry>Y'<subscript>13</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;8:</entry>
+ <entry>Y'<subscript>20</subscript></entry>
+ <entry>Y'<subscript>21</subscript></entry>
+ <entry>Y'<subscript>22</subscript></entry>
+ <entry>Y'<subscript>23</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;12:</entry>
+ <entry>Y'<subscript>30</subscript></entry>
+ <entry>Y'<subscript>31</subscript></entry>
+ <entry>Y'<subscript>32</subscript></entry>
+ <entry>Y'<subscript>33</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;16:</entry>
+ <entry>Cb<subscript>00</subscript></entry>
+ <entry>Cr<subscript>00</subscript></entry>
+ <entry>Cb<subscript>01</subscript></entry>
+ <entry>Cr<subscript>01</subscript></entry>
+ <entry>Cb<subscript>02</subscript></entry>
+ <entry>Cr<subscript>02</subscript></entry>
+ <entry>Cb<subscript>03</subscript></entry>
+ <entry>Cr<subscript>03</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;24:</entry>
+ <entry>Cb<subscript>10</subscript></entry>
+ <entry>Cr<subscript>10</subscript></entry>
+ <entry>Cb<subscript>11</subscript></entry>
+ <entry>Cr<subscript>11</subscript></entry>
+ <entry>Cb<subscript>12</subscript></entry>
+ <entry>Cr<subscript>12</subscript></entry>
+ <entry>Cb<subscript>13</subscript></entry>
+ <entry>Cr<subscript>13</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;32:</entry>
+ <entry>Cb<subscript>20</subscript></entry>
+ <entry>Cr<subscript>20</subscript></entry>
+ <entry>Cb<subscript>21</subscript></entry>
+ <entry>Cr<subscript>21</subscript></entry>
+ <entry>Cb<subscript>22</subscript></entry>
+ <entry>Cr<subscript>22</subscript></entry>
+ <entry>Cb<subscript>23</subscript></entry>
+ <entry>Cr<subscript>23</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;40:</entry>
+ <entry>Cb<subscript>30</subscript></entry>
+ <entry>Cr<subscript>30</subscript></entry>
+ <entry>Cb<subscript>31</subscript></entry>
+ <entry>Cr<subscript>31</subscript></entry>
+ <entry>Cb<subscript>32</subscript></entry>
+ <entry>Cr<subscript>32</subscript></entry>
+ <entry>Cb<subscript>33</subscript></entry>
+ <entry>Cr<subscript>33</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+ </example>
+ </refsect1>
+ </refentry>
diff --git a/Documentation/DocBook/media/v4l/pixfmt-packed-rgb.xml b/Documentation/DocBook/media/v4l/pixfmt-packed-rgb.xml
new file mode 100644
index 000000000..b60fb935b
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/pixfmt-packed-rgb.xml
@@ -0,0 +1,937 @@
+<refentry id="packed-rgb">
+ <refmeta>
+ <refentrytitle>Packed RGB formats</refentrytitle>
+ &manvol;
+ </refmeta>
+ <refnamediv>
+ <refname>Packed RGB formats</refname>
+ <refpurpose>Packed RGB formats</refpurpose>
+ </refnamediv>
+ <refsect1>
+ <title>Description</title>
+
+ <para>These formats are designed to match the pixel formats of
+typical PC graphics frame buffers. They occupy 8, 16, 24 or 32 bits
+per pixel. These are all packed-pixel formats, meaning all the data
+for a pixel lie next to each other in memory.</para>
+
+ <table pgwide="1" frame="none" id="rgb-formats">
+ <title>Packed RGB Image Formats</title>
+ <tgroup cols="37" align="center">
+ <colspec colname="id" align="left" />
+ <colspec colname="fourcc" />
+ <colspec colname="bit" />
+
+ <colspec colnum="4" colname="b07" align="center" />
+ <colspec colnum="5" colname="b06" align="center" />
+ <colspec colnum="6" colname="b05" align="center" />
+ <colspec colnum="7" colname="b04" align="center" />
+ <colspec colnum="8" colname="b03" align="center" />
+ <colspec colnum="9" colname="b02" align="center" />
+ <colspec colnum="10" colname="b01" align="center" />
+ <colspec colnum="11" colname="b00" align="center" />
+
+ <colspec colnum="13" colname="b17" align="center" />
+ <colspec colnum="14" colname="b16" align="center" />
+ <colspec colnum="15" colname="b15" align="center" />
+ <colspec colnum="16" colname="b14" align="center" />
+ <colspec colnum="17" colname="b13" align="center" />
+ <colspec colnum="18" colname="b12" align="center" />
+ <colspec colnum="19" colname="b11" align="center" />
+ <colspec colnum="20" colname="b10" align="center" />
+
+ <colspec colnum="22" colname="b27" align="center" />
+ <colspec colnum="23" colname="b26" align="center" />
+ <colspec colnum="24" colname="b25" align="center" />
+ <colspec colnum="25" colname="b24" align="center" />
+ <colspec colnum="26" colname="b23" align="center" />
+ <colspec colnum="27" colname="b22" align="center" />
+ <colspec colnum="28" colname="b21" align="center" />
+ <colspec colnum="29" colname="b20" align="center" />
+
+ <colspec colnum="31" colname="b37" align="center" />
+ <colspec colnum="32" colname="b36" align="center" />
+ <colspec colnum="33" colname="b35" align="center" />
+ <colspec colnum="34" colname="b34" align="center" />
+ <colspec colnum="35" colname="b33" align="center" />
+ <colspec colnum="36" colname="b32" align="center" />
+ <colspec colnum="37" colname="b31" align="center" />
+ <colspec colnum="38" colname="b30" align="center" />
+
+ <spanspec namest="b07" nameend="b00" spanname="b0" />
+ <spanspec namest="b17" nameend="b10" spanname="b1" />
+ <spanspec namest="b27" nameend="b20" spanname="b2" />
+ <spanspec namest="b37" nameend="b30" spanname="b3" />
+ <thead>
+ <row>
+ <entry>Identifier</entry>
+ <entry>Code</entry>
+ <entry>&nbsp;</entry>
+ <entry spanname="b0">Byte&nbsp;0 in memory</entry>
+ <entry spanname="b1">Byte&nbsp;1</entry>
+ <entry spanname="b2">Byte&nbsp;2</entry>
+ <entry spanname="b3">Byte&nbsp;3</entry>
+ </row>
+ <row>
+ <entry>&nbsp;</entry>
+ <entry>&nbsp;</entry>
+ <entry>Bit</entry>
+ <entry>7</entry>
+ <entry>6</entry>
+ <entry>5</entry>
+ <entry>4</entry>
+ <entry>3</entry>
+ <entry>2</entry>
+ <entry>1</entry>
+ <entry>0</entry>
+ <entry>&nbsp;</entry>
+ <entry>7</entry>
+ <entry>6</entry>
+ <entry>5</entry>
+ <entry>4</entry>
+ <entry>3</entry>
+ <entry>2</entry>
+ <entry>1</entry>
+ <entry>0</entry>
+ <entry>&nbsp;</entry>
+ <entry>7</entry>
+ <entry>6</entry>
+ <entry>5</entry>
+ <entry>4</entry>
+ <entry>3</entry>
+ <entry>2</entry>
+ <entry>1</entry>
+ <entry>0</entry>
+ <entry>&nbsp;</entry>
+ <entry>7</entry>
+ <entry>6</entry>
+ <entry>5</entry>
+ <entry>4</entry>
+ <entry>3</entry>
+ <entry>2</entry>
+ <entry>1</entry>
+ <entry>0</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row id="V4L2-PIX-FMT-RGB332">
+ <entry><constant>V4L2_PIX_FMT_RGB332</constant></entry>
+ <entry>'RGB1'</entry>
+ <entry></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ </row>
+ <row id="V4L2-PIX-FMT-ARGB444">
+ <entry><constant>V4L2_PIX_FMT_ARGB444</constant></entry>
+ <entry>'AR12'</entry>
+ <entry></entry>
+ <entry>g<subscript>3</subscript></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ <entry></entry>
+ <entry>a<subscript>3</subscript></entry>
+ <entry>a<subscript>2</subscript></entry>
+ <entry>a<subscript>1</subscript></entry>
+ <entry>a<subscript>0</subscript></entry>
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ </row>
+ <row id="V4L2-PIX-FMT-XRGB444">
+ <entry><constant>V4L2_PIX_FMT_XRGB444</constant></entry>
+ <entry>'XR12'</entry>
+ <entry></entry>
+ <entry>g<subscript>3</subscript></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ <entry></entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ </row>
+ <row id="V4L2-PIX-FMT-ARGB555">
+ <entry><constant>V4L2_PIX_FMT_ARGB555</constant></entry>
+ <entry>'AR15'</entry>
+ <entry></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ <entry>b<subscript>4</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ <entry></entry>
+ <entry>a</entry>
+ <entry>r<subscript>4</subscript></entry>
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ </row>
+ <row id="V4L2-PIX-FMT-XRGB555">
+ <entry><constant>V4L2_PIX_FMT_XRGB555</constant></entry>
+ <entry>'XR15'</entry>
+ <entry></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ <entry>b<subscript>4</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ <entry></entry>
+ <entry>-</entry>
+ <entry>r<subscript>4</subscript></entry>
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ </row>
+ <row id="V4L2-PIX-FMT-RGB565">
+ <entry><constant>V4L2_PIX_FMT_RGB565</constant></entry>
+ <entry>'RGBP'</entry>
+ <entry></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ <entry>b<subscript>4</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ <entry></entry>
+ <entry>r<subscript>4</subscript></entry>
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ <entry>g<subscript>5</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ </row>
+ <row id="V4L2-PIX-FMT-ARGB555X">
+ <entry><constant>V4L2_PIX_FMT_ARGB555X</constant></entry>
+ <entry>'AR15' | (1 &lt;&lt; 31)</entry>
+ <entry></entry>
+ <entry>a</entry>
+ <entry>r<subscript>4</subscript></entry>
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ <entry></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ <entry>b<subscript>4</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ </row>
+ <row id="V4L2-PIX-FMT-XRGB555X">
+ <entry><constant>V4L2_PIX_FMT_XRGB555X</constant></entry>
+ <entry>'XR15' | (1 &lt;&lt; 31)</entry>
+ <entry></entry>
+ <entry>-</entry>
+ <entry>r<subscript>4</subscript></entry>
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ <entry></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ <entry>b<subscript>4</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ </row>
+ <row id="V4L2-PIX-FMT-RGB565X">
+ <entry><constant>V4L2_PIX_FMT_RGB565X</constant></entry>
+ <entry>'RGBR'</entry>
+ <entry></entry>
+ <entry>r<subscript>4</subscript></entry>
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ <entry>g<subscript>5</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ <entry></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ <entry>b<subscript>4</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ </row>
+ <row id="V4L2-PIX-FMT-BGR24">
+ <entry><constant>V4L2_PIX_FMT_BGR24</constant></entry>
+ <entry>'BGR3'</entry>
+ <entry></entry>
+ <entry>b<subscript>7</subscript></entry>
+ <entry>b<subscript>6</subscript></entry>
+ <entry>b<subscript>5</subscript></entry>
+ <entry>b<subscript>4</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ <entry></entry>
+ <entry>g<subscript>7</subscript></entry>
+ <entry>g<subscript>6</subscript></entry>
+ <entry>g<subscript>5</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ <entry></entry>
+ <entry>r<subscript>7</subscript></entry>
+ <entry>r<subscript>6</subscript></entry>
+ <entry>r<subscript>5</subscript></entry>
+ <entry>r<subscript>4</subscript></entry>
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ </row>
+ <row id="V4L2-PIX-FMT-RGB24">
+ <entry><constant>V4L2_PIX_FMT_RGB24</constant></entry>
+ <entry>'RGB3'</entry>
+ <entry></entry>
+ <entry>r<subscript>7</subscript></entry>
+ <entry>r<subscript>6</subscript></entry>
+ <entry>r<subscript>5</subscript></entry>
+ <entry>r<subscript>4</subscript></entry>
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ <entry></entry>
+ <entry>g<subscript>7</subscript></entry>
+ <entry>g<subscript>6</subscript></entry>
+ <entry>g<subscript>5</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ <entry></entry>
+ <entry>b<subscript>7</subscript></entry>
+ <entry>b<subscript>6</subscript></entry>
+ <entry>b<subscript>5</subscript></entry>
+ <entry>b<subscript>4</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ </row>
+ <row id="V4L2-PIX-FMT-BGR666">
+ <entry><constant>V4L2_PIX_FMT_BGR666</constant></entry>
+ <entry>'BGRH'</entry>
+ <entry></entry>
+ <entry>b<subscript>5</subscript></entry>
+ <entry>b<subscript>4</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ <entry>g<subscript>5</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry></entry>
+ <entry>g<subscript>3</subscript></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ <entry>r<subscript>5</subscript></entry>
+ <entry>r<subscript>4</subscript></entry>
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry></entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ </row>
+ <row id="V4L2-PIX-FMT-ABGR32">
+ <entry><constant>V4L2_PIX_FMT_ABGR32</constant></entry>
+ <entry>'AR24'</entry>
+ <entry></entry>
+ <entry>b<subscript>7</subscript></entry>
+ <entry>b<subscript>6</subscript></entry>
+ <entry>b<subscript>5</subscript></entry>
+ <entry>b<subscript>4</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ <entry></entry>
+ <entry>g<subscript>7</subscript></entry>
+ <entry>g<subscript>6</subscript></entry>
+ <entry>g<subscript>5</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ <entry></entry>
+ <entry>r<subscript>7</subscript></entry>
+ <entry>r<subscript>6</subscript></entry>
+ <entry>r<subscript>5</subscript></entry>
+ <entry>r<subscript>4</subscript></entry>
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ <entry></entry>
+ <entry>a<subscript>7</subscript></entry>
+ <entry>a<subscript>6</subscript></entry>
+ <entry>a<subscript>5</subscript></entry>
+ <entry>a<subscript>4</subscript></entry>
+ <entry>a<subscript>3</subscript></entry>
+ <entry>a<subscript>2</subscript></entry>
+ <entry>a<subscript>1</subscript></entry>
+ <entry>a<subscript>0</subscript></entry>
+ </row>
+ <row id="V4L2-PIX-FMT-XBGR32">
+ <entry><constant>V4L2_PIX_FMT_XBGR32</constant></entry>
+ <entry>'XR24'</entry>
+ <entry></entry>
+ <entry>b<subscript>7</subscript></entry>
+ <entry>b<subscript>6</subscript></entry>
+ <entry>b<subscript>5</subscript></entry>
+ <entry>b<subscript>4</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ <entry></entry>
+ <entry>g<subscript>7</subscript></entry>
+ <entry>g<subscript>6</subscript></entry>
+ <entry>g<subscript>5</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ <entry></entry>
+ <entry>r<subscript>7</subscript></entry>
+ <entry>r<subscript>6</subscript></entry>
+ <entry>r<subscript>5</subscript></entry>
+ <entry>r<subscript>4</subscript></entry>
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ <entry></entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ </row>
+ <row id="V4L2-PIX-FMT-ARGB32">
+ <entry><constant>V4L2_PIX_FMT_ARGB32</constant></entry>
+ <entry>'BA24'</entry>
+ <entry></entry>
+ <entry>a<subscript>7</subscript></entry>
+ <entry>a<subscript>6</subscript></entry>
+ <entry>a<subscript>5</subscript></entry>
+ <entry>a<subscript>4</subscript></entry>
+ <entry>a<subscript>3</subscript></entry>
+ <entry>a<subscript>2</subscript></entry>
+ <entry>a<subscript>1</subscript></entry>
+ <entry>a<subscript>0</subscript></entry>
+ <entry></entry>
+ <entry>r<subscript>7</subscript></entry>
+ <entry>r<subscript>6</subscript></entry>
+ <entry>r<subscript>5</subscript></entry>
+ <entry>r<subscript>4</subscript></entry>
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ <entry></entry>
+ <entry>g<subscript>7</subscript></entry>
+ <entry>g<subscript>6</subscript></entry>
+ <entry>g<subscript>5</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ <entry></entry>
+ <entry>b<subscript>7</subscript></entry>
+ <entry>b<subscript>6</subscript></entry>
+ <entry>b<subscript>5</subscript></entry>
+ <entry>b<subscript>4</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ </row>
+ <row id="V4L2-PIX-FMT-XRGB32">
+ <entry><constant>V4L2_PIX_FMT_XRGB32</constant></entry>
+ <entry>'BX24'</entry>
+ <entry></entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry></entry>
+ <entry>r<subscript>7</subscript></entry>
+ <entry>r<subscript>6</subscript></entry>
+ <entry>r<subscript>5</subscript></entry>
+ <entry>r<subscript>4</subscript></entry>
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ <entry></entry>
+ <entry>g<subscript>7</subscript></entry>
+ <entry>g<subscript>6</subscript></entry>
+ <entry>g<subscript>5</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ <entry></entry>
+ <entry>b<subscript>7</subscript></entry>
+ <entry>b<subscript>6</subscript></entry>
+ <entry>b<subscript>5</subscript></entry>
+ <entry>b<subscript>4</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <para>Bit 7 is the most significant bit.</para>
+
+ <para>The usage and value of the alpha bits (a) in the ARGB and ABGR formats
+ (collectively referred to as alpha formats) depend on the device type and
+ hardware operation. <link linkend="capture">Capture</link> devices
+ (including capture queues of mem-to-mem devices) fill the alpha component in
+ memory. When the device outputs an alpha channel the alpha component will
+ have a meaningful value. Otherwise, when the device doesn't output an alpha
+ channel but can set the alpha bit to a user-configurable value, the <link
+ linkend="v4l2-alpha-component"><constant>V4L2_CID_ALPHA_COMPONENT</constant>
+ </link> control is used to specify that alpha value, and the alpha component
+ of all pixels will be set to the value specified by that control. Otherwise
+ a corresponding format without an alpha component (XRGB or XBGR) must be
+ used instead of an alpha format.</para>
+
+ <para><link linkend="output">Output</link> devices (including output queues
+ of mem-to-mem devices and <link linkend="osd">video output overlay</link>
+ devices) read the alpha component from memory. When the device processes the
+ alpha channel the alpha component must be filled with meaningful values by
+ applications. Otherwise a corresponding format without an alpha component
+ (XRGB or XBGR) must be used instead of an alpha format.</para>
+
+ <para>The XRGB and XBGR formats contain undefined bits (-). Applications,
+ devices and drivers must ignore those bits, for both <link
+ linkend="capture">capture</link> and <link linkend="output">output</link>
+ devices.</para>
+
+ <example>
+ <title><constant>V4L2_PIX_FMT_BGR24</constant> 4 &times; 4 pixel
+image</title>
+
+ <formalpara>
+ <title>Byte Order.</title>
+ <para>Each cell is one byte.
+ <informaltable frame="none">
+ <tgroup cols="13" align="center">
+ <colspec align="left" colwidth="2*" />
+ <tbody valign="top">
+ <row>
+ <entry>start&nbsp;+&nbsp;0:</entry>
+ <entry>B<subscript>00</subscript></entry>
+ <entry>G<subscript>00</subscript></entry>
+ <entry>R<subscript>00</subscript></entry>
+ <entry>B<subscript>01</subscript></entry>
+ <entry>G<subscript>01</subscript></entry>
+ <entry>R<subscript>01</subscript></entry>
+ <entry>B<subscript>02</subscript></entry>
+ <entry>G<subscript>02</subscript></entry>
+ <entry>R<subscript>02</subscript></entry>
+ <entry>B<subscript>03</subscript></entry>
+ <entry>G<subscript>03</subscript></entry>
+ <entry>R<subscript>03</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;12:</entry>
+ <entry>B<subscript>10</subscript></entry>
+ <entry>G<subscript>10</subscript></entry>
+ <entry>R<subscript>10</subscript></entry>
+ <entry>B<subscript>11</subscript></entry>
+ <entry>G<subscript>11</subscript></entry>
+ <entry>R<subscript>11</subscript></entry>
+ <entry>B<subscript>12</subscript></entry>
+ <entry>G<subscript>12</subscript></entry>
+ <entry>R<subscript>12</subscript></entry>
+ <entry>B<subscript>13</subscript></entry>
+ <entry>G<subscript>13</subscript></entry>
+ <entry>R<subscript>13</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;24:</entry>
+ <entry>B<subscript>20</subscript></entry>
+ <entry>G<subscript>20</subscript></entry>
+ <entry>R<subscript>20</subscript></entry>
+ <entry>B<subscript>21</subscript></entry>
+ <entry>G<subscript>21</subscript></entry>
+ <entry>R<subscript>21</subscript></entry>
+ <entry>B<subscript>22</subscript></entry>
+ <entry>G<subscript>22</subscript></entry>
+ <entry>R<subscript>22</subscript></entry>
+ <entry>B<subscript>23</subscript></entry>
+ <entry>G<subscript>23</subscript></entry>
+ <entry>R<subscript>23</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;36:</entry>
+ <entry>B<subscript>30</subscript></entry>
+ <entry>G<subscript>30</subscript></entry>
+ <entry>R<subscript>30</subscript></entry>
+ <entry>B<subscript>31</subscript></entry>
+ <entry>G<subscript>31</subscript></entry>
+ <entry>R<subscript>31</subscript></entry>
+ <entry>B<subscript>32</subscript></entry>
+ <entry>G<subscript>32</subscript></entry>
+ <entry>R<subscript>32</subscript></entry>
+ <entry>B<subscript>33</subscript></entry>
+ <entry>G<subscript>33</subscript></entry>
+ <entry>R<subscript>33</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+ </example>
+
+ <para>Formats defined in <xref linkend="rgb-formats-deprecated"/> are
+ deprecated and must not be used by new drivers. They are documented here for
+ reference. The meaning of their alpha bits (a) is ill-defined and
+ interpreted as in either the corresponding ARGB or XRGB format, depending on
+ the driver.</para>
+
+ <table pgwide="1" frame="none" id="rgb-formats-deprecated">
+ <title>Deprecated Packed RGB Image Formats</title>
+ <tgroup cols="37" align="center">
+ <colspec colname="id" align="left" />
+ <colspec colname="fourcc" />
+ <colspec colname="bit" />
+
+ <colspec colnum="4" colname="b07" align="center" />
+ <colspec colnum="5" colname="b06" align="center" />
+ <colspec colnum="6" colname="b05" align="center" />
+ <colspec colnum="7" colname="b04" align="center" />
+ <colspec colnum="8" colname="b03" align="center" />
+ <colspec colnum="9" colname="b02" align="center" />
+ <colspec colnum="10" colname="b01" align="center" />
+ <colspec colnum="11" colname="b00" align="center" />
+
+ <colspec colnum="13" colname="b17" align="center" />
+ <colspec colnum="14" colname="b16" align="center" />
+ <colspec colnum="15" colname="b15" align="center" />
+ <colspec colnum="16" colname="b14" align="center" />
+ <colspec colnum="17" colname="b13" align="center" />
+ <colspec colnum="18" colname="b12" align="center" />
+ <colspec colnum="19" colname="b11" align="center" />
+ <colspec colnum="20" colname="b10" align="center" />
+
+ <colspec colnum="22" colname="b27" align="center" />
+ <colspec colnum="23" colname="b26" align="center" />
+ <colspec colnum="24" colname="b25" align="center" />
+ <colspec colnum="25" colname="b24" align="center" />
+ <colspec colnum="26" colname="b23" align="center" />
+ <colspec colnum="27" colname="b22" align="center" />
+ <colspec colnum="28" colname="b21" align="center" />
+ <colspec colnum="29" colname="b20" align="center" />
+
+ <colspec colnum="31" colname="b37" align="center" />
+ <colspec colnum="32" colname="b36" align="center" />
+ <colspec colnum="33" colname="b35" align="center" />
+ <colspec colnum="34" colname="b34" align="center" />
+ <colspec colnum="35" colname="b33" align="center" />
+ <colspec colnum="36" colname="b32" align="center" />
+ <colspec colnum="37" colname="b31" align="center" />
+ <colspec colnum="38" colname="b30" align="center" />
+
+ <spanspec namest="b07" nameend="b00" spanname="b0" />
+ <spanspec namest="b17" nameend="b10" spanname="b1" />
+ <spanspec namest="b27" nameend="b20" spanname="b2" />
+ <spanspec namest="b37" nameend="b30" spanname="b3" />
+ <thead>
+ <row>
+ <entry>Identifier</entry>
+ <entry>Code</entry>
+ <entry>&nbsp;</entry>
+ <entry spanname="b0">Byte&nbsp;0 in memory</entry>
+ <entry spanname="b1">Byte&nbsp;1</entry>
+ <entry spanname="b2">Byte&nbsp;2</entry>
+ <entry spanname="b3">Byte&nbsp;3</entry>
+ </row>
+ <row>
+ <entry>&nbsp;</entry>
+ <entry>&nbsp;</entry>
+ <entry>Bit</entry>
+ <entry>7</entry>
+ <entry>6</entry>
+ <entry>5</entry>
+ <entry>4</entry>
+ <entry>3</entry>
+ <entry>2</entry>
+ <entry>1</entry>
+ <entry>0</entry>
+ <entry>&nbsp;</entry>
+ <entry>7</entry>
+ <entry>6</entry>
+ <entry>5</entry>
+ <entry>4</entry>
+ <entry>3</entry>
+ <entry>2</entry>
+ <entry>1</entry>
+ <entry>0</entry>
+ <entry>&nbsp;</entry>
+ <entry>7</entry>
+ <entry>6</entry>
+ <entry>5</entry>
+ <entry>4</entry>
+ <entry>3</entry>
+ <entry>2</entry>
+ <entry>1</entry>
+ <entry>0</entry>
+ <entry>&nbsp;</entry>
+ <entry>7</entry>
+ <entry>6</entry>
+ <entry>5</entry>
+ <entry>4</entry>
+ <entry>3</entry>
+ <entry>2</entry>
+ <entry>1</entry>
+ <entry>0</entry>
+ </row>
+ </thead>
+ <tbody>
+ <row id="V4L2-PIX-FMT-RGB444">
+ <entry><constant>V4L2_PIX_FMT_RGB444</constant></entry>
+ <entry>'R444'</entry>
+ <entry></entry>
+ <entry>g<subscript>3</subscript></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ <entry></entry>
+ <entry>a<subscript>3</subscript></entry>
+ <entry>a<subscript>2</subscript></entry>
+ <entry>a<subscript>1</subscript></entry>
+ <entry>a<subscript>0</subscript></entry>
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ </row>
+ <row id="V4L2-PIX-FMT-RGB555">
+ <entry><constant>V4L2_PIX_FMT_RGB555</constant></entry>
+ <entry>'RGBO'</entry>
+ <entry></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ <entry>b<subscript>4</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ <entry></entry>
+ <entry>a</entry>
+ <entry>r<subscript>4</subscript></entry>
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ </row>
+ <row id="V4L2-PIX-FMT-RGB555X">
+ <entry><constant>V4L2_PIX_FMT_RGB555X</constant></entry>
+ <entry>'RGBQ'</entry>
+ <entry></entry>
+ <entry>a</entry>
+ <entry>r<subscript>4</subscript></entry>
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ <entry></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ <entry>b<subscript>4</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ </row>
+ <row id="V4L2-PIX-FMT-BGR32">
+ <entry><constant>V4L2_PIX_FMT_BGR32</constant></entry>
+ <entry>'BGR4'</entry>
+ <entry></entry>
+ <entry>b<subscript>7</subscript></entry>
+ <entry>b<subscript>6</subscript></entry>
+ <entry>b<subscript>5</subscript></entry>
+ <entry>b<subscript>4</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ <entry></entry>
+ <entry>g<subscript>7</subscript></entry>
+ <entry>g<subscript>6</subscript></entry>
+ <entry>g<subscript>5</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ <entry></entry>
+ <entry>r<subscript>7</subscript></entry>
+ <entry>r<subscript>6</subscript></entry>
+ <entry>r<subscript>5</subscript></entry>
+ <entry>r<subscript>4</subscript></entry>
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ <entry></entry>
+ <entry>a<subscript>7</subscript></entry>
+ <entry>a<subscript>6</subscript></entry>
+ <entry>a<subscript>5</subscript></entry>
+ <entry>a<subscript>4</subscript></entry>
+ <entry>a<subscript>3</subscript></entry>
+ <entry>a<subscript>2</subscript></entry>
+ <entry>a<subscript>1</subscript></entry>
+ <entry>a<subscript>0</subscript></entry>
+ </row>
+ <row id="V4L2-PIX-FMT-RGB32">
+ <entry><constant>V4L2_PIX_FMT_RGB32</constant></entry>
+ <entry>'RGB4'</entry>
+ <entry></entry>
+ <entry>a<subscript>7</subscript></entry>
+ <entry>a<subscript>6</subscript></entry>
+ <entry>a<subscript>5</subscript></entry>
+ <entry>a<subscript>4</subscript></entry>
+ <entry>a<subscript>3</subscript></entry>
+ <entry>a<subscript>2</subscript></entry>
+ <entry>a<subscript>1</subscript></entry>
+ <entry>a<subscript>0</subscript></entry>
+ <entry></entry>
+ <entry>r<subscript>7</subscript></entry>
+ <entry>r<subscript>6</subscript></entry>
+ <entry>r<subscript>5</subscript></entry>
+ <entry>r<subscript>4</subscript></entry>
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ <entry></entry>
+ <entry>g<subscript>7</subscript></entry>
+ <entry>g<subscript>6</subscript></entry>
+ <entry>g<subscript>5</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ <entry></entry>
+ <entry>b<subscript>7</subscript></entry>
+ <entry>b<subscript>6</subscript></entry>
+ <entry>b<subscript>5</subscript></entry>
+ <entry>b<subscript>4</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <para>A test utility to determine which RGB formats a driver
+actually supports is available from the LinuxTV v4l-dvb repository.
+See &v4l-dvb; for access instructions.</para>
+
+ </refsect1>
+ </refentry>
diff --git a/Documentation/DocBook/media/v4l/pixfmt-packed-yuv.xml b/Documentation/DocBook/media/v4l/pixfmt-packed-yuv.xml
new file mode 100644
index 000000000..33fa5a47a
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/pixfmt-packed-yuv.xml
@@ -0,0 +1,236 @@
+<refentry id="packed-yuv">
+ <refmeta>
+ <refentrytitle>Packed YUV formats</refentrytitle>
+ &manvol;
+ </refmeta>
+ <refnamediv>
+ <refname>Packed YUV formats</refname>
+ <refpurpose>Packed YUV formats</refpurpose>
+ </refnamediv>
+ <refsect1>
+ <title>Description</title>
+
+ <para>Similar to the packed RGB formats these formats store
+the Y, Cb and Cr component of each pixel in one 16 or 32 bit
+word.</para>
+
+ <table pgwide="1" frame="none">
+ <title>Packed YUV Image Formats</title>
+ <tgroup cols="37" align="center">
+ <colspec colname="id" align="left" />
+ <colspec colname="fourcc" />
+ <colspec colname="bit" />
+
+ <colspec colnum="4" colname="b07" align="center" />
+ <colspec colnum="5" colname="b06" align="center" />
+ <colspec colnum="6" colname="b05" align="center" />
+ <colspec colnum="7" colname="b04" align="center" />
+ <colspec colnum="8" colname="b03" align="center" />
+ <colspec colnum="9" colname="b02" align="center" />
+ <colspec colnum="10" colname="b01" align="center" />
+ <colspec colnum="11" colname="b00" align="center" />
+
+ <colspec colnum="13" colname="b17" align="center" />
+ <colspec colnum="14" colname="b16" align="center" />
+ <colspec colnum="15" colname="b15" align="center" />
+ <colspec colnum="16" colname="b14" align="center" />
+ <colspec colnum="17" colname="b13" align="center" />
+ <colspec colnum="18" colname="b12" align="center" />
+ <colspec colnum="19" colname="b11" align="center" />
+ <colspec colnum="20" colname="b10" align="center" />
+
+ <colspec colnum="22" colname="b27" align="center" />
+ <colspec colnum="23" colname="b26" align="center" />
+ <colspec colnum="24" colname="b25" align="center" />
+ <colspec colnum="25" colname="b24" align="center" />
+ <colspec colnum="26" colname="b23" align="center" />
+ <colspec colnum="27" colname="b22" align="center" />
+ <colspec colnum="28" colname="b21" align="center" />
+ <colspec colnum="29" colname="b20" align="center" />
+
+ <colspec colnum="31" colname="b37" align="center" />
+ <colspec colnum="32" colname="b36" align="center" />
+ <colspec colnum="33" colname="b35" align="center" />
+ <colspec colnum="34" colname="b34" align="center" />
+ <colspec colnum="35" colname="b33" align="center" />
+ <colspec colnum="36" colname="b32" align="center" />
+ <colspec colnum="37" colname="b31" align="center" />
+ <colspec colnum="38" colname="b30" align="center" />
+
+ <spanspec namest="b07" nameend="b00" spanname="b0" />
+ <spanspec namest="b17" nameend="b10" spanname="b1" />
+ <spanspec namest="b27" nameend="b20" spanname="b2" />
+ <spanspec namest="b37" nameend="b30" spanname="b3" />
+ <thead>
+ <row>
+ <entry>Identifier</entry>
+ <entry>Code</entry>
+ <entry>&nbsp;</entry>
+ <entry spanname="b0">Byte&nbsp;0 in memory</entry>
+ <entry spanname="b1">Byte&nbsp;1</entry>
+ <entry spanname="b2">Byte&nbsp;2</entry>
+ <entry spanname="b3">Byte&nbsp;3</entry>
+ </row>
+ <row>
+ <entry>&nbsp;</entry>
+ <entry>&nbsp;</entry>
+ <entry>Bit</entry>
+ <entry>7</entry>
+ <entry>6</entry>
+ <entry>5</entry>
+ <entry>4</entry>
+ <entry>3</entry>
+ <entry>2</entry>
+ <entry>1</entry>
+ <entry>0</entry>
+ <entry>&nbsp;</entry>
+ <entry>7</entry>
+ <entry>6</entry>
+ <entry>5</entry>
+ <entry>4</entry>
+ <entry>3</entry>
+ <entry>2</entry>
+ <entry>1</entry>
+ <entry>0</entry>
+ <entry>&nbsp;</entry>
+ <entry>7</entry>
+ <entry>6</entry>
+ <entry>5</entry>
+ <entry>4</entry>
+ <entry>3</entry>
+ <entry>2</entry>
+ <entry>1</entry>
+ <entry>0</entry>
+ <entry>&nbsp;</entry>
+ <entry>7</entry>
+ <entry>6</entry>
+ <entry>5</entry>
+ <entry>4</entry>
+ <entry>3</entry>
+ <entry>2</entry>
+ <entry>1</entry>
+ <entry>0</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row id="V4L2-PIX-FMT-YUV444">
+ <entry><constant>V4L2_PIX_FMT_YUV444</constant></entry>
+ <entry>'Y444'</entry>
+ <entry></entry>
+ <entry>Cb<subscript>3</subscript></entry>
+ <entry>Cb<subscript>2</subscript></entry>
+ <entry>Cb<subscript>1</subscript></entry>
+ <entry>Cb<subscript>0</subscript></entry>
+ <entry>Cr<subscript>3</subscript></entry>
+ <entry>Cr<subscript>2</subscript></entry>
+ <entry>Cr<subscript>1</subscript></entry>
+ <entry>Cr<subscript>0</subscript></entry>
+ <entry></entry>
+ <entry>a<subscript>3</subscript></entry>
+ <entry>a<subscript>2</subscript></entry>
+ <entry>a<subscript>1</subscript></entry>
+ <entry>a<subscript>0</subscript></entry>
+ <entry>Y'<subscript>3</subscript></entry>
+ <entry>Y'<subscript>2</subscript></entry>
+ <entry>Y'<subscript>1</subscript></entry>
+ <entry>Y'<subscript>0</subscript></entry>
+ </row>
+
+ <row id="V4L2-PIX-FMT-YUV555">
+ <entry><constant>V4L2_PIX_FMT_YUV555</constant></entry>
+ <entry>'YUVO'</entry>
+ <entry></entry>
+ <entry>Cb<subscript>2</subscript></entry>
+ <entry>Cb<subscript>1</subscript></entry>
+ <entry>Cb<subscript>0</subscript></entry>
+ <entry>Cr<subscript>4</subscript></entry>
+ <entry>Cr<subscript>3</subscript></entry>
+ <entry>Cr<subscript>2</subscript></entry>
+ <entry>Cr<subscript>1</subscript></entry>
+ <entry>Cr<subscript>0</subscript></entry>
+ <entry></entry>
+ <entry>a</entry>
+ <entry>Y'<subscript>4</subscript></entry>
+ <entry>Y'<subscript>3</subscript></entry>
+ <entry>Y'<subscript>2</subscript></entry>
+ <entry>Y'<subscript>1</subscript></entry>
+ <entry>Y'<subscript>0</subscript></entry>
+ <entry>Cb<subscript>4</subscript></entry>
+ <entry>Cb<subscript>3</subscript></entry>
+ </row>
+
+ <row id="V4L2-PIX-FMT-YUV565">
+ <entry><constant>V4L2_PIX_FMT_YUV565</constant></entry>
+ <entry>'YUVP'</entry>
+ <entry></entry>
+ <entry>Cb<subscript>2</subscript></entry>
+ <entry>Cb<subscript>1</subscript></entry>
+ <entry>Cb<subscript>0</subscript></entry>
+ <entry>Cr<subscript>4</subscript></entry>
+ <entry>Cr<subscript>3</subscript></entry>
+ <entry>Cr<subscript>2</subscript></entry>
+ <entry>Cr<subscript>1</subscript></entry>
+ <entry>Cr<subscript>0</subscript></entry>
+ <entry></entry>
+ <entry>Y'<subscript>4</subscript></entry>
+ <entry>Y'<subscript>3</subscript></entry>
+ <entry>Y'<subscript>2</subscript></entry>
+ <entry>Y'<subscript>1</subscript></entry>
+ <entry>Y'<subscript>0</subscript></entry>
+ <entry>Cb<subscript>5</subscript></entry>
+ <entry>Cb<subscript>4</subscript></entry>
+ <entry>Cb<subscript>3</subscript></entry>
+ </row>
+
+ <row id="V4L2-PIX-FMT-YUV32">
+ <entry><constant>V4L2_PIX_FMT_YUV32</constant></entry>
+ <entry>'YUV4'</entry>
+ <entry></entry>
+ <entry>a<subscript>7</subscript></entry>
+ <entry>a<subscript>6</subscript></entry>
+ <entry>a<subscript>5</subscript></entry>
+ <entry>a<subscript>4</subscript></entry>
+ <entry>a<subscript>3</subscript></entry>
+ <entry>a<subscript>2</subscript></entry>
+ <entry>a<subscript>1</subscript></entry>
+ <entry>a<subscript>0</subscript></entry>
+ <entry></entry>
+ <entry>Y'<subscript>7</subscript></entry>
+ <entry>Y'<subscript>6</subscript></entry>
+ <entry>Y'<subscript>5</subscript></entry>
+ <entry>Y'<subscript>4</subscript></entry>
+ <entry>Y'<subscript>3</subscript></entry>
+ <entry>Y'<subscript>2</subscript></entry>
+ <entry>Y'<subscript>1</subscript></entry>
+ <entry>Y'<subscript>0</subscript></entry>
+ <entry></entry>
+ <entry>Cb<subscript>7</subscript></entry>
+ <entry>Cb<subscript>6</subscript></entry>
+ <entry>Cb<subscript>5</subscript></entry>
+ <entry>Cb<subscript>4</subscript></entry>
+ <entry>Cb<subscript>3</subscript></entry>
+ <entry>Cb<subscript>2</subscript></entry>
+ <entry>Cb<subscript>1</subscript></entry>
+ <entry>Cb<subscript>0</subscript></entry>
+ <entry></entry>
+ <entry>Cr<subscript>7</subscript></entry>
+ <entry>Cr<subscript>6</subscript></entry>
+ <entry>Cr<subscript>5</subscript></entry>
+ <entry>Cr<subscript>4</subscript></entry>
+ <entry>Cr<subscript>3</subscript></entry>
+ <entry>Cr<subscript>2</subscript></entry>
+ <entry>Cr<subscript>1</subscript></entry>
+ <entry>Cr<subscript>0</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <para>Bit 7 is the most significant bit. The value of a = alpha
+bits is undefined when reading from the driver, ignored when writing
+to the driver, except when alpha blending has been negotiated for a
+<link linkend="overlay">Video Overlay</link> or <link
+linkend="osd">Video Output Overlay</link>.</para>
+
+ </refsect1>
+ </refentry>
diff --git a/Documentation/DocBook/media/v4l/pixfmt-sbggr16.xml b/Documentation/DocBook/media/v4l/pixfmt-sbggr16.xml
new file mode 100644
index 000000000..6494b05d8
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/pixfmt-sbggr16.xml
@@ -0,0 +1,83 @@
+<refentry id="V4L2-PIX-FMT-SBGGR16">
+ <refmeta>
+ <refentrytitle>V4L2_PIX_FMT_SBGGR16 ('BYR2')</refentrytitle>
+ &manvol;
+ </refmeta>
+ <refnamediv>
+ <refname><constant>V4L2_PIX_FMT_SBGGR16</constant></refname>
+ <refpurpose>Bayer RGB format</refpurpose>
+ </refnamediv>
+ <refsect1>
+ <title>Description</title>
+
+ <para>This format is similar to <link
+linkend="V4L2-PIX-FMT-SBGGR8">
+<constant>V4L2_PIX_FMT_SBGGR8</constant></link>, except each pixel has
+a depth of 16 bits. The least significant byte is stored at lower
+memory addresses (little-endian). Note the actual sampling precision
+may be lower than 16 bits, for example 10 bits per pixel with values
+in range 0 to 1023.</para>
+
+ <example>
+ <title><constant>V4L2_PIX_FMT_SBGGR16</constant> 4 &times; 4
+pixel image</title>
+
+ <formalpara>
+ <title>Byte Order.</title>
+ <para>Each cell is one byte.
+ <informaltable frame="none">
+ <tgroup cols="5" align="center">
+ <colspec align="left" colwidth="2*" />
+ <tbody valign="top">
+ <row>
+ <entry>start&nbsp;+&nbsp;0:</entry>
+ <entry>B<subscript>00low</subscript></entry>
+ <entry>B<subscript>00high</subscript></entry>
+ <entry>G<subscript>01low</subscript></entry>
+ <entry>G<subscript>01high</subscript></entry>
+ <entry>B<subscript>02low</subscript></entry>
+ <entry>B<subscript>02high</subscript></entry>
+ <entry>G<subscript>03low</subscript></entry>
+ <entry>G<subscript>03high</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;8:</entry>
+ <entry>G<subscript>10low</subscript></entry>
+ <entry>G<subscript>10high</subscript></entry>
+ <entry>R<subscript>11low</subscript></entry>
+ <entry>R<subscript>11high</subscript></entry>
+ <entry>G<subscript>12low</subscript></entry>
+ <entry>G<subscript>12high</subscript></entry>
+ <entry>R<subscript>13low</subscript></entry>
+ <entry>R<subscript>13high</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;16:</entry>
+ <entry>B<subscript>20low</subscript></entry>
+ <entry>B<subscript>20high</subscript></entry>
+ <entry>G<subscript>21low</subscript></entry>
+ <entry>G<subscript>21high</subscript></entry>
+ <entry>B<subscript>22low</subscript></entry>
+ <entry>B<subscript>22high</subscript></entry>
+ <entry>G<subscript>23low</subscript></entry>
+ <entry>G<subscript>23high</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;24:</entry>
+ <entry>G<subscript>30low</subscript></entry>
+ <entry>G<subscript>30high</subscript></entry>
+ <entry>R<subscript>31low</subscript></entry>
+ <entry>R<subscript>31high</subscript></entry>
+ <entry>G<subscript>32low</subscript></entry>
+ <entry>G<subscript>32high</subscript></entry>
+ <entry>R<subscript>33low</subscript></entry>
+ <entry>R<subscript>33high</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+ </example>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/pixfmt-sbggr8.xml b/Documentation/DocBook/media/v4l/pixfmt-sbggr8.xml
new file mode 100644
index 000000000..5eaf2b42d
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/pixfmt-sbggr8.xml
@@ -0,0 +1,67 @@
+ <refentry id="V4L2-PIX-FMT-SBGGR8">
+ <refmeta>
+ <refentrytitle>V4L2_PIX_FMT_SBGGR8 ('BA81')</refentrytitle>
+ &manvol;
+ </refmeta>
+ <refnamediv>
+ <refname><constant>V4L2_PIX_FMT_SBGGR8</constant></refname>
+ <refpurpose>Bayer RGB format</refpurpose>
+ </refnamediv>
+ <refsect1>
+ <title>Description</title>
+
+ <para>This is commonly the native format of digital cameras,
+reflecting the arrangement of sensors on the CCD device. Only one red,
+green or blue value is given for each pixel. Missing components must
+be interpolated from neighbouring pixels. From left to right the first
+row consists of a blue and green value, the second row of a green and
+red value. This scheme repeats to the right and down for every two
+columns and rows.</para>
+
+ <example>
+ <title><constant>V4L2_PIX_FMT_SBGGR8</constant> 4 &times; 4
+pixel image</title>
+
+ <formalpara>
+ <title>Byte Order.</title>
+ <para>Each cell is one byte.
+ <informaltable frame="none">
+ <tgroup cols="5" align="center">
+ <colspec align="left" colwidth="2*" />
+ <tbody valign="top">
+ <row>
+ <entry>start&nbsp;+&nbsp;0:</entry>
+ <entry>B<subscript>00</subscript></entry>
+ <entry>G<subscript>01</subscript></entry>
+ <entry>B<subscript>02</subscript></entry>
+ <entry>G<subscript>03</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;4:</entry>
+ <entry>G<subscript>10</subscript></entry>
+ <entry>R<subscript>11</subscript></entry>
+ <entry>G<subscript>12</subscript></entry>
+ <entry>R<subscript>13</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;8:</entry>
+ <entry>B<subscript>20</subscript></entry>
+ <entry>G<subscript>21</subscript></entry>
+ <entry>B<subscript>22</subscript></entry>
+ <entry>G<subscript>23</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;12:</entry>
+ <entry>G<subscript>30</subscript></entry>
+ <entry>R<subscript>31</subscript></entry>
+ <entry>G<subscript>32</subscript></entry>
+ <entry>R<subscript>33</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+ </example>
+ </refsect1>
+ </refentry>
diff --git a/Documentation/DocBook/media/v4l/pixfmt-sdr-cs08.xml b/Documentation/DocBook/media/v4l/pixfmt-sdr-cs08.xml
new file mode 100644
index 000000000..6118d8f7a
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/pixfmt-sdr-cs08.xml
@@ -0,0 +1,44 @@
+<refentry id="V4L2-SDR-FMT-CS08">
+ <refmeta>
+ <refentrytitle>V4L2_SDR_FMT_CS8 ('CS08')</refentrytitle>
+ &manvol;
+ </refmeta>
+ <refnamediv>
+ <refname>
+ <constant>V4L2_SDR_FMT_CS8</constant>
+ </refname>
+ <refpurpose>Complex signed 8-bit IQ sample</refpurpose>
+ </refnamediv>
+ <refsect1>
+ <title>Description</title>
+ <para>
+This format contains sequence of complex number samples. Each complex number
+consist two parts, called In-phase and Quadrature (IQ). Both I and Q are
+represented as a 8 bit signed number. I value comes first and Q value after
+that.
+ </para>
+ <example>
+ <title><constant>V4L2_SDR_FMT_CS8</constant> 1 sample</title>
+ <formalpara>
+ <title>Byte Order.</title>
+ <para>Each cell is one byte.
+ <informaltable frame="none">
+ <tgroup cols="2" align="center">
+ <colspec align="left" colwidth="2*" />
+ <tbody valign="top">
+ <row>
+ <entry>start&nbsp;+&nbsp;0:</entry>
+ <entry>I'<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;1:</entry>
+ <entry>Q'<subscript>0</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+ </example>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/pixfmt-sdr-cs14le.xml b/Documentation/DocBook/media/v4l/pixfmt-sdr-cs14le.xml
new file mode 100644
index 000000000..e4b494ce1
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/pixfmt-sdr-cs14le.xml
@@ -0,0 +1,47 @@
+<refentry id="V4L2-SDR-FMT-CS14LE">
+ <refmeta>
+ <refentrytitle>V4L2_SDR_FMT_CS14LE ('CS14')</refentrytitle>
+ &manvol;
+ </refmeta>
+ <refnamediv>
+ <refname>
+ <constant>V4L2_SDR_FMT_CS14LE</constant>
+ </refname>
+ <refpurpose>Complex signed 14-bit little endian IQ sample</refpurpose>
+ </refnamediv>
+ <refsect1>
+ <title>Description</title>
+ <para>
+This format contains sequence of complex number samples. Each complex number
+consist two parts, called In-phase and Quadrature (IQ). Both I and Q are
+represented as a 14 bit signed little endian number. I value comes first
+and Q value after that. 14 bit value is stored in 16 bit space with unused
+high bits padded with 0.
+ </para>
+ <example>
+ <title><constant>V4L2_SDR_FMT_CS14LE</constant> 1 sample</title>
+ <formalpara>
+ <title>Byte Order.</title>
+ <para>Each cell is one byte.
+ <informaltable frame="none">
+ <tgroup cols="3" align="center">
+ <colspec align="left" colwidth="2*" />
+ <tbody valign="top">
+ <row>
+ <entry>start&nbsp;+&nbsp;0:</entry>
+ <entry>I'<subscript>0[7:0]</subscript></entry>
+ <entry>I'<subscript>0[13:8]</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;2:</entry>
+ <entry>Q'<subscript>0[7:0]</subscript></entry>
+ <entry>Q'<subscript>0[13:8]</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+ </example>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/pixfmt-sdr-cu08.xml b/Documentation/DocBook/media/v4l/pixfmt-sdr-cu08.xml
new file mode 100644
index 000000000..2d80104c1
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/pixfmt-sdr-cu08.xml
@@ -0,0 +1,44 @@
+<refentry id="V4L2-SDR-FMT-CU08">
+ <refmeta>
+ <refentrytitle>V4L2_SDR_FMT_CU8 ('CU08')</refentrytitle>
+ &manvol;
+ </refmeta>
+ <refnamediv>
+ <refname>
+ <constant>V4L2_SDR_FMT_CU8</constant>
+ </refname>
+ <refpurpose>Complex unsigned 8-bit IQ sample</refpurpose>
+ </refnamediv>
+ <refsect1>
+ <title>Description</title>
+ <para>
+This format contains sequence of complex number samples. Each complex number
+consist two parts, called In-phase and Quadrature (IQ). Both I and Q are
+represented as a 8 bit unsigned number. I value comes first and Q value after
+that.
+ </para>
+ <example>
+ <title><constant>V4L2_SDR_FMT_CU8</constant> 1 sample</title>
+ <formalpara>
+ <title>Byte Order.</title>
+ <para>Each cell is one byte.
+ <informaltable frame="none">
+ <tgroup cols="2" align="center">
+ <colspec align="left" colwidth="2*" />
+ <tbody valign="top">
+ <row>
+ <entry>start&nbsp;+&nbsp;0:</entry>
+ <entry>I'<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;1:</entry>
+ <entry>Q'<subscript>0</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+ </example>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/pixfmt-sdr-cu16le.xml b/Documentation/DocBook/media/v4l/pixfmt-sdr-cu16le.xml
new file mode 100644
index 000000000..26288ffa9
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/pixfmt-sdr-cu16le.xml
@@ -0,0 +1,46 @@
+<refentry id="V4L2-SDR-FMT-CU16LE">
+ <refmeta>
+ <refentrytitle>V4L2_SDR_FMT_CU16LE ('CU16')</refentrytitle>
+ &manvol;
+ </refmeta>
+ <refnamediv>
+ <refname>
+ <constant>V4L2_SDR_FMT_CU16LE</constant>
+ </refname>
+ <refpurpose>Complex unsigned 16-bit little endian IQ sample</refpurpose>
+ </refnamediv>
+ <refsect1>
+ <title>Description</title>
+ <para>
+This format contains sequence of complex number samples. Each complex number
+consist two parts, called In-phase and Quadrature (IQ). Both I and Q are
+represented as a 16 bit unsigned little endian number. I value comes first
+and Q value after that.
+ </para>
+ <example>
+ <title><constant>V4L2_SDR_FMT_CU16LE</constant> 1 sample</title>
+ <formalpara>
+ <title>Byte Order.</title>
+ <para>Each cell is one byte.
+ <informaltable frame="none">
+ <tgroup cols="3" align="center">
+ <colspec align="left" colwidth="2*" />
+ <tbody valign="top">
+ <row>
+ <entry>start&nbsp;+&nbsp;0:</entry>
+ <entry>I'<subscript>0[7:0]</subscript></entry>
+ <entry>I'<subscript>0[15:8]</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;2:</entry>
+ <entry>Q'<subscript>0[7:0]</subscript></entry>
+ <entry>Q'<subscript>0[15:8]</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+ </example>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/pixfmt-sdr-ru12le.xml b/Documentation/DocBook/media/v4l/pixfmt-sdr-ru12le.xml
new file mode 100644
index 000000000..3df076b99
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/pixfmt-sdr-ru12le.xml
@@ -0,0 +1,40 @@
+<refentry id="V4L2-SDR-FMT-RU12LE">
+ <refmeta>
+ <refentrytitle>V4L2_SDR_FMT_RU12LE ('RU12')</refentrytitle>
+ &manvol;
+ </refmeta>
+ <refnamediv>
+ <refname>
+ <constant>V4L2_SDR_FMT_RU12LE</constant>
+ </refname>
+ <refpurpose>Real unsigned 12-bit little endian sample</refpurpose>
+ </refnamediv>
+ <refsect1>
+ <title>Description</title>
+ <para>
+This format contains sequence of real number samples. Each sample is
+represented as a 12 bit unsigned little endian number. Sample is stored
+in 16 bit space with unused high bits padded with 0.
+ </para>
+ <example>
+ <title><constant>V4L2_SDR_FMT_RU12LE</constant> 1 sample</title>
+ <formalpara>
+ <title>Byte Order.</title>
+ <para>Each cell is one byte.
+ <informaltable frame="none">
+ <tgroup cols="3" align="center">
+ <colspec align="left" colwidth="2*" />
+ <tbody valign="top">
+ <row>
+ <entry>start&nbsp;+&nbsp;0:</entry>
+ <entry>I'<subscript>0[7:0]</subscript></entry>
+ <entry>I'<subscript>0[11:8]</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+ </example>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/pixfmt-sgbrg8.xml b/Documentation/DocBook/media/v4l/pixfmt-sgbrg8.xml
new file mode 100644
index 000000000..fee65dca7
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/pixfmt-sgbrg8.xml
@@ -0,0 +1,67 @@
+ <refentry id="V4L2-PIX-FMT-SGBRG8">
+ <refmeta>
+ <refentrytitle>V4L2_PIX_FMT_SGBRG8 ('GBRG')</refentrytitle>
+ &manvol;
+ </refmeta>
+ <refnamediv>
+ <refname><constant>V4L2_PIX_FMT_SGBRG8</constant></refname>
+ <refpurpose>Bayer RGB format</refpurpose>
+ </refnamediv>
+ <refsect1>
+ <title>Description</title>
+
+ <para>This is commonly the native format of digital cameras,
+reflecting the arrangement of sensors on the CCD device. Only one red,
+green or blue value is given for each pixel. Missing components must
+be interpolated from neighbouring pixels. From left to right the first
+row consists of a green and blue value, the second row of a red and
+green value. This scheme repeats to the right and down for every two
+columns and rows.</para>
+
+ <example>
+ <title><constant>V4L2_PIX_FMT_SGBRG8</constant> 4 &times; 4
+pixel image</title>
+
+ <formalpara>
+ <title>Byte Order.</title>
+ <para>Each cell is one byte.
+ <informaltable frame="none">
+ <tgroup cols="5" align="center">
+ <colspec align="left" colwidth="2*" />
+ <tbody valign="top">
+ <row>
+ <entry>start&nbsp;+&nbsp;0:</entry>
+ <entry>G<subscript>00</subscript></entry>
+ <entry>B<subscript>01</subscript></entry>
+ <entry>G<subscript>02</subscript></entry>
+ <entry>B<subscript>03</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;4:</entry>
+ <entry>R<subscript>10</subscript></entry>
+ <entry>G<subscript>11</subscript></entry>
+ <entry>R<subscript>12</subscript></entry>
+ <entry>G<subscript>13</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;8:</entry>
+ <entry>G<subscript>20</subscript></entry>
+ <entry>B<subscript>21</subscript></entry>
+ <entry>G<subscript>22</subscript></entry>
+ <entry>B<subscript>23</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;12:</entry>
+ <entry>R<subscript>30</subscript></entry>
+ <entry>G<subscript>31</subscript></entry>
+ <entry>R<subscript>32</subscript></entry>
+ <entry>G<subscript>33</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+ </example>
+ </refsect1>
+ </refentry>
diff --git a/Documentation/DocBook/media/v4l/pixfmt-sgrbg8.xml b/Documentation/DocBook/media/v4l/pixfmt-sgrbg8.xml
new file mode 100644
index 000000000..7803b8c41
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/pixfmt-sgrbg8.xml
@@ -0,0 +1,67 @@
+ <refentry id="V4L2-PIX-FMT-SGRBG8">
+ <refmeta>
+ <refentrytitle>V4L2_PIX_FMT_SGRBG8 ('GRBG')</refentrytitle>
+ &manvol;
+ </refmeta>
+ <refnamediv>
+ <refname><constant>V4L2_PIX_FMT_SGRBG8</constant></refname>
+ <refpurpose>Bayer RGB format</refpurpose>
+ </refnamediv>
+ <refsect1>
+ <title>Description</title>
+
+ <para>This is commonly the native format of digital cameras,
+reflecting the arrangement of sensors on the CCD device. Only one red,
+green or blue value is given for each pixel. Missing components must
+be interpolated from neighbouring pixels. From left to right the first
+row consists of a green and blue value, the second row of a red and
+green value. This scheme repeats to the right and down for every two
+columns and rows.</para>
+
+ <example>
+ <title><constant>V4L2_PIX_FMT_SGRBG8</constant> 4 &times;
+4 pixel image</title>
+
+ <formalpara>
+ <title>Byte Order.</title>
+ <para>Each cell is one byte.
+ <informaltable frame="none">
+ <tgroup cols="5" align="center">
+ <colspec align="left" colwidth="2*" />
+ <tbody valign="top">
+ <row>
+ <entry>start&nbsp;+&nbsp;0:</entry>
+ <entry>G<subscript>00</subscript></entry>
+ <entry>R<subscript>01</subscript></entry>
+ <entry>G<subscript>02</subscript></entry>
+ <entry>R<subscript>03</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;4:</entry>
+ <entry>B<subscript>10</subscript></entry>
+ <entry>G<subscript>11</subscript></entry>
+ <entry>B<subscript>12</subscript></entry>
+ <entry>G<subscript>13</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;8:</entry>
+ <entry>G<subscript>20</subscript></entry>
+ <entry>R<subscript>21</subscript></entry>
+ <entry>G<subscript>22</subscript></entry>
+ <entry>R<subscript>23</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;12:</entry>
+ <entry>B<subscript>30</subscript></entry>
+ <entry>G<subscript>31</subscript></entry>
+ <entry>B<subscript>32</subscript></entry>
+ <entry>G<subscript>33</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+ </example>
+ </refsect1>
+ </refentry>
diff --git a/Documentation/DocBook/media/v4l/pixfmt-srggb10.xml b/Documentation/DocBook/media/v4l/pixfmt-srggb10.xml
new file mode 100644
index 000000000..f34d03ebd
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/pixfmt-srggb10.xml
@@ -0,0 +1,90 @@
+ <refentry id="pixfmt-srggb10">
+ <refmeta>
+ <refentrytitle>V4L2_PIX_FMT_SRGGB10 ('RG10'),
+ V4L2_PIX_FMT_SGRBG10 ('BA10'),
+ V4L2_PIX_FMT_SGBRG10 ('GB10'),
+ V4L2_PIX_FMT_SBGGR10 ('BG10'),
+ </refentrytitle>
+ &manvol;
+ </refmeta>
+ <refnamediv>
+ <refname id="V4L2-PIX-FMT-SRGGB10"><constant>V4L2_PIX_FMT_SRGGB10</constant></refname>
+ <refname id="V4L2-PIX-FMT-SGRBG10"><constant>V4L2_PIX_FMT_SGRBG10</constant></refname>
+ <refname id="V4L2-PIX-FMT-SGBRG10"><constant>V4L2_PIX_FMT_SGBRG10</constant></refname>
+ <refname id="V4L2-PIX-FMT-SBGGR10"><constant>V4L2_PIX_FMT_SBGGR10</constant></refname>
+ <refpurpose>10-bit Bayer formats expanded to 16 bits</refpurpose>
+ </refnamediv>
+ <refsect1>
+ <title>Description</title>
+
+ <para>These four pixel formats are raw sRGB / Bayer formats with
+10 bits per colour. Each colour component is stored in a 16-bit word, with 6
+unused high bits filled with zeros. Each n-pixel row contains n/2 green samples
+and n/2 blue or red samples, with alternating red and blue rows. Bytes are
+stored in memory in little endian order. They are conventionally described
+as GRGR... BGBG..., RGRG... GBGB..., etc. Below is an example of one of these
+formats</para>
+
+ <example>
+ <title><constant>V4L2_PIX_FMT_SBGGR10</constant> 4 &times; 4
+pixel image</title>
+
+ <formalpara>
+ <title>Byte Order.</title>
+ <para>Each cell is one byte, high 6 bits in high bytes are 0.
+ <informaltable frame="none">
+ <tgroup cols="5" align="center">
+ <colspec align="left" colwidth="2*" />
+ <tbody valign="top">
+ <row>
+ <entry>start&nbsp;+&nbsp;0:</entry>
+ <entry>B<subscript>00low</subscript></entry>
+ <entry>B<subscript>00high</subscript></entry>
+ <entry>G<subscript>01low</subscript></entry>
+ <entry>G<subscript>01high</subscript></entry>
+ <entry>B<subscript>02low</subscript></entry>
+ <entry>B<subscript>02high</subscript></entry>
+ <entry>G<subscript>03low</subscript></entry>
+ <entry>G<subscript>03high</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;8:</entry>
+ <entry>G<subscript>10low</subscript></entry>
+ <entry>G<subscript>10high</subscript></entry>
+ <entry>R<subscript>11low</subscript></entry>
+ <entry>R<subscript>11high</subscript></entry>
+ <entry>G<subscript>12low</subscript></entry>
+ <entry>G<subscript>12high</subscript></entry>
+ <entry>R<subscript>13low</subscript></entry>
+ <entry>R<subscript>13high</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;16:</entry>
+ <entry>B<subscript>20low</subscript></entry>
+ <entry>B<subscript>20high</subscript></entry>
+ <entry>G<subscript>21low</subscript></entry>
+ <entry>G<subscript>21high</subscript></entry>
+ <entry>B<subscript>22low</subscript></entry>
+ <entry>B<subscript>22high</subscript></entry>
+ <entry>G<subscript>23low</subscript></entry>
+ <entry>G<subscript>23high</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;24:</entry>
+ <entry>G<subscript>30low</subscript></entry>
+ <entry>G<subscript>30high</subscript></entry>
+ <entry>R<subscript>31low</subscript></entry>
+ <entry>R<subscript>31high</subscript></entry>
+ <entry>G<subscript>32low</subscript></entry>
+ <entry>G<subscript>32high</subscript></entry>
+ <entry>R<subscript>33low</subscript></entry>
+ <entry>R<subscript>33high</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+ </example>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/pixfmt-srggb10alaw8.xml b/Documentation/DocBook/media/v4l/pixfmt-srggb10alaw8.xml
new file mode 100644
index 000000000..d2e5845e5
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/pixfmt-srggb10alaw8.xml
@@ -0,0 +1,34 @@
+ <refentry>
+ <refmeta>
+ <refentrytitle>
+ V4L2_PIX_FMT_SBGGR10ALAW8 ('aBA8'),
+ V4L2_PIX_FMT_SGBRG10ALAW8 ('aGA8'),
+ V4L2_PIX_FMT_SGRBG10ALAW8 ('agA8'),
+ V4L2_PIX_FMT_SRGGB10ALAW8 ('aRA8'),
+ </refentrytitle>
+ &manvol;
+ </refmeta>
+ <refnamediv>
+ <refname id="V4L2-PIX-FMT-SBGGR10ALAW8">
+ <constant>V4L2_PIX_FMT_SBGGR10ALAW8</constant>
+ </refname>
+ <refname id="V4L2-PIX-FMT-SGBRG10ALAW8">
+ <constant>V4L2_PIX_FMT_SGBRG10ALAW8</constant>
+ </refname>
+ <refname id="V4L2-PIX-FMT-SGRBG10ALAW8">
+ <constant>V4L2_PIX_FMT_SGRBG10ALAW8</constant>
+ </refname>
+ <refname id="V4L2-PIX-FMT-SRGGB10ALAW8">
+ <constant>V4L2_PIX_FMT_SRGGB10ALAW8</constant>
+ </refname>
+ <refpurpose>10-bit Bayer formats compressed to 8 bits</refpurpose>
+ </refnamediv>
+ <refsect1>
+ <title>Description</title>
+ <para>These four pixel formats are raw sRGB / Bayer
+ formats with 10 bits per color compressed to 8 bits each,
+ using the A-LAW algorithm. Each color component consumes 8
+ bits of memory. In other respects this format is similar to
+ <xref linkend="V4L2-PIX-FMT-SRGGB8"></xref>.</para>
+ </refsect1>
+ </refentry>
diff --git a/Documentation/DocBook/media/v4l/pixfmt-srggb10dpcm8.xml b/Documentation/DocBook/media/v4l/pixfmt-srggb10dpcm8.xml
new file mode 100644
index 000000000..bde89878c
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/pixfmt-srggb10dpcm8.xml
@@ -0,0 +1,28 @@
+ <refentry id="pixfmt-srggb10dpcm8">
+ <refmeta>
+ <refentrytitle>
+ V4L2_PIX_FMT_SBGGR10DPCM8 ('bBA8'),
+ V4L2_PIX_FMT_SGBRG10DPCM8 ('bGA8'),
+ V4L2_PIX_FMT_SGRBG10DPCM8 ('BD10'),
+ V4L2_PIX_FMT_SRGGB10DPCM8 ('bRA8'),
+ </refentrytitle>
+ &manvol;
+ </refmeta>
+ <refnamediv>
+ <refname id="V4L2-PIX-FMT-SBGGR10DPCM8"><constant>V4L2_PIX_FMT_SBGGR10DPCM8</constant></refname>
+ <refname id="V4L2-PIX-FMT-SGBRG10DPCM8"><constant>V4L2_PIX_FMT_SGBRG10DPCM8</constant></refname>
+ <refname id="V4L2-PIX-FMT-SGRBG10DPCM8"><constant>V4L2_PIX_FMT_SGRBG10DPCM8</constant></refname>
+ <refname id="V4L2-PIX-FMT-SRGGB10DPCM8"><constant>V4L2_PIX_FMT_SRGGB10DPCM8</constant></refname>
+ <refpurpose>10-bit Bayer formats compressed to 8 bits</refpurpose>
+ </refnamediv>
+ <refsect1>
+ <title>Description</title>
+
+ <para>These four pixel formats are raw sRGB / Bayer formats
+ with 10 bits per colour compressed to 8 bits each, using DPCM
+ compression. DPCM, differential pulse-code modulation, is lossy.
+ Each colour component consumes 8 bits of memory. In other respects
+ this format is similar to <xref linkend="pixfmt-srggb10" />.</para>
+
+ </refsect1>
+ </refentry>
diff --git a/Documentation/DocBook/media/v4l/pixfmt-srggb10p.xml b/Documentation/DocBook/media/v4l/pixfmt-srggb10p.xml
new file mode 100644
index 000000000..a8cc102cd
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/pixfmt-srggb10p.xml
@@ -0,0 +1,99 @@
+ <refentry id="pixfmt-srggb10p">
+ <refmeta>
+ <refentrytitle>V4L2_PIX_FMT_SRGGB10P ('pRAA'),
+ V4L2_PIX_FMT_SGRBG10P ('pgAA'),
+ V4L2_PIX_FMT_SGBRG10P ('pGAA'),
+ V4L2_PIX_FMT_SBGGR10P ('pBAA'),
+ </refentrytitle>
+ &manvol;
+ </refmeta>
+ <refnamediv>
+ <refname id="V4L2-PIX-FMT-SRGGB10P"><constant>V4L2_PIX_FMT_SRGGB10P</constant></refname>
+ <refname id="V4L2-PIX-FMT-SGRBG10P"><constant>V4L2_PIX_FMT_SGRBG10P</constant></refname>
+ <refname id="V4L2-PIX-FMT-SGBRG10P"><constant>V4L2_PIX_FMT_SGBRG10P</constant></refname>
+ <refname id="V4L2-PIX-FMT-SBGGR10P"><constant>V4L2_PIX_FMT_SBGGR10P</constant></refname>
+ <refpurpose>10-bit packed Bayer formats</refpurpose>
+ </refnamediv>
+ <refsect1>
+ <title>Description</title>
+
+ <para>These four pixel formats are packed raw sRGB /
+ Bayer formats with 10 bits per colour. Every four consecutive
+ colour components are packed into 5 bytes. Each of the first 4
+ bytes contain the 8 high order bits of the pixels, and the
+ fifth byte contains the two least significants bits of each
+ pixel, in the same order.</para>
+
+ <para>Each n-pixel row contains n/2 green samples and n/2 blue
+ or red samples, with alternating green-red and green-blue
+ rows. They are conventionally described as GRGR... BGBG...,
+ RGRG... GBGB..., etc. Below is an example of one of these
+ formats:</para>
+
+ <example>
+ <title><constant>V4L2_PIX_FMT_SBGGR10P</constant> 4 &times; 4
+ pixel image</title>
+
+ <formalpara>
+ <title>Byte Order.</title>
+ <para>Each cell is one byte.
+ <informaltable frame="topbot" colsep="1" rowsep="1">
+ <tgroup cols="5" align="center">
+ <colspec align="left" colwidth="2*" />
+ <tbody valign="top">
+ <row>
+ <entry>start&nbsp;+&nbsp;0:</entry>
+ <entry>B<subscript>00high</subscript></entry>
+ <entry>G<subscript>01high</subscript></entry>
+ <entry>B<subscript>02high</subscript></entry>
+ <entry>G<subscript>03high</subscript></entry>
+ <entry>B<subscript>00low</subscript>(bits 7--6)
+ G<subscript>01low</subscript>(bits 5--4)
+ B<subscript>02low</subscript>(bits 3--2)
+ G<subscript>03low</subscript>(bits 1--0)
+ </entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;5:</entry>
+ <entry>G<subscript>10high</subscript></entry>
+ <entry>R<subscript>11high</subscript></entry>
+ <entry>G<subscript>12high</subscript></entry>
+ <entry>R<subscript>13high</subscript></entry>
+ <entry>G<subscript>10low</subscript>(bits 7--6)
+ R<subscript>11low</subscript>(bits 5--4)
+ G<subscript>12low</subscript>(bits 3--2)
+ R<subscript>13low</subscript>(bits 1--0)
+ </entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;10:</entry>
+ <entry>B<subscript>20high</subscript></entry>
+ <entry>G<subscript>21high</subscript></entry>
+ <entry>B<subscript>22high</subscript></entry>
+ <entry>G<subscript>23high</subscript></entry>
+ <entry>B<subscript>20low</subscript>(bits 7--6)
+ G<subscript>21low</subscript>(bits 5--4)
+ B<subscript>22low</subscript>(bits 3--2)
+ G<subscript>23low</subscript>(bits 1--0)
+ </entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;15:</entry>
+ <entry>G<subscript>30high</subscript></entry>
+ <entry>R<subscript>31high</subscript></entry>
+ <entry>G<subscript>32high</subscript></entry>
+ <entry>R<subscript>33high</subscript></entry>
+ <entry>G<subscript>30low</subscript>(bits 7--6)
+ R<subscript>31low</subscript>(bits 5--4)
+ G<subscript>32low</subscript>(bits 3--2)
+ R<subscript>33low</subscript>(bits 1--0)
+ </entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+ </example>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/pixfmt-srggb12.xml b/Documentation/DocBook/media/v4l/pixfmt-srggb12.xml
new file mode 100644
index 000000000..0c8e4adf4
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/pixfmt-srggb12.xml
@@ -0,0 +1,90 @@
+ <refentry>
+ <refmeta>
+ <refentrytitle>V4L2_PIX_FMT_SRGGB12 ('RG12'),
+ V4L2_PIX_FMT_SGRBG12 ('BA12'),
+ V4L2_PIX_FMT_SGBRG12 ('GB12'),
+ V4L2_PIX_FMT_SBGGR12 ('BG12'),
+ </refentrytitle>
+ &manvol;
+ </refmeta>
+ <refnamediv>
+ <refname id="V4L2-PIX-FMT-SRGGB12"><constant>V4L2_PIX_FMT_SRGGB12</constant></refname>
+ <refname id="V4L2-PIX-FMT-SGRBG12"><constant>V4L2_PIX_FMT_SGRBG12</constant></refname>
+ <refname id="V4L2-PIX-FMT-SGBRG12"><constant>V4L2_PIX_FMT_SGBRG12</constant></refname>
+ <refname id="V4L2-PIX-FMT-SBGGR12"><constant>V4L2_PIX_FMT_SBGGR12</constant></refname>
+ <refpurpose>12-bit Bayer formats expanded to 16 bits</refpurpose>
+ </refnamediv>
+ <refsect1>
+ <title>Description</title>
+
+ <para>These four pixel formats are raw sRGB / Bayer formats with
+12 bits per colour. Each colour component is stored in a 16-bit word, with 4
+unused high bits filled with zeros. Each n-pixel row contains n/2 green samples
+and n/2 blue or red samples, with alternating red and blue rows. Bytes are
+stored in memory in little endian order. They are conventionally described
+as GRGR... BGBG..., RGRG... GBGB..., etc. Below is an example of one of these
+formats</para>
+
+ <example>
+ <title><constant>V4L2_PIX_FMT_SBGGR12</constant> 4 &times; 4
+pixel image</title>
+
+ <formalpara>
+ <title>Byte Order.</title>
+ <para>Each cell is one byte, high 6 bits in high bytes are 0.
+ <informaltable frame="none">
+ <tgroup cols="5" align="center">
+ <colspec align="left" colwidth="2*" />
+ <tbody valign="top">
+ <row>
+ <entry>start&nbsp;+&nbsp;0:</entry>
+ <entry>B<subscript>00low</subscript></entry>
+ <entry>B<subscript>00high</subscript></entry>
+ <entry>G<subscript>01low</subscript></entry>
+ <entry>G<subscript>01high</subscript></entry>
+ <entry>B<subscript>02low</subscript></entry>
+ <entry>B<subscript>02high</subscript></entry>
+ <entry>G<subscript>03low</subscript></entry>
+ <entry>G<subscript>03high</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;8:</entry>
+ <entry>G<subscript>10low</subscript></entry>
+ <entry>G<subscript>10high</subscript></entry>
+ <entry>R<subscript>11low</subscript></entry>
+ <entry>R<subscript>11high</subscript></entry>
+ <entry>G<subscript>12low</subscript></entry>
+ <entry>G<subscript>12high</subscript></entry>
+ <entry>R<subscript>13low</subscript></entry>
+ <entry>R<subscript>13high</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;16:</entry>
+ <entry>B<subscript>20low</subscript></entry>
+ <entry>B<subscript>20high</subscript></entry>
+ <entry>G<subscript>21low</subscript></entry>
+ <entry>G<subscript>21high</subscript></entry>
+ <entry>B<subscript>22low</subscript></entry>
+ <entry>B<subscript>22high</subscript></entry>
+ <entry>G<subscript>23low</subscript></entry>
+ <entry>G<subscript>23high</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;24:</entry>
+ <entry>G<subscript>30low</subscript></entry>
+ <entry>G<subscript>30high</subscript></entry>
+ <entry>R<subscript>31low</subscript></entry>
+ <entry>R<subscript>31high</subscript></entry>
+ <entry>G<subscript>32low</subscript></entry>
+ <entry>G<subscript>32high</subscript></entry>
+ <entry>R<subscript>33low</subscript></entry>
+ <entry>R<subscript>33high</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+ </example>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/pixfmt-srggb8.xml b/Documentation/DocBook/media/v4l/pixfmt-srggb8.xml
new file mode 100644
index 000000000..2570e3be3
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/pixfmt-srggb8.xml
@@ -0,0 +1,67 @@
+ <refentry id="V4L2-PIX-FMT-SRGGB8">
+ <refmeta>
+ <refentrytitle>V4L2_PIX_FMT_SRGGB8 ('RGGB')</refentrytitle>
+ &manvol;
+ </refmeta>
+ <refnamediv>
+ <refname><constant>V4L2_PIX_FMT_SRGGB8</constant></refname>
+ <refpurpose>Bayer RGB format</refpurpose>
+ </refnamediv>
+ <refsect1>
+ <title>Description</title>
+
+ <para>This is commonly the native format of digital cameras,
+reflecting the arrangement of sensors on the CCD device. Only one red,
+green or blue value is given for each pixel. Missing components must
+be interpolated from neighbouring pixels. From left to right the first
+row consists of a red and green value, the second row of a green and
+blue value. This scheme repeats to the right and down for every two
+columns and rows.</para>
+
+ <example>
+ <title><constant>V4L2_PIX_FMT_SRGGB8</constant> 4 &times; 4
+pixel image</title>
+
+ <formalpara>
+ <title>Byte Order.</title>
+ <para>Each cell is one byte.
+ <informaltable frame="none">
+ <tgroup cols="5" align="center">
+ <colspec align="left" colwidth="2*" />
+ <tbody valign="top">
+ <row>
+ <entry>start&nbsp;+&nbsp;0:</entry>
+ <entry>R<subscript>00</subscript></entry>
+ <entry>G<subscript>01</subscript></entry>
+ <entry>R<subscript>02</subscript></entry>
+ <entry>G<subscript>03</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;4:</entry>
+ <entry>G<subscript>10</subscript></entry>
+ <entry>B<subscript>11</subscript></entry>
+ <entry>G<subscript>12</subscript></entry>
+ <entry>B<subscript>13</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;8:</entry>
+ <entry>R<subscript>20</subscript></entry>
+ <entry>G<subscript>21</subscript></entry>
+ <entry>R<subscript>22</subscript></entry>
+ <entry>G<subscript>23</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;12:</entry>
+ <entry>G<subscript>30</subscript></entry>
+ <entry>B<subscript>31</subscript></entry>
+ <entry>G<subscript>32</subscript></entry>
+ <entry>B<subscript>33</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+ </example>
+ </refsect1>
+ </refentry>
diff --git a/Documentation/DocBook/media/v4l/pixfmt-uv8.xml b/Documentation/DocBook/media/v4l/pixfmt-uv8.xml
new file mode 100644
index 000000000..c507c1f73
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/pixfmt-uv8.xml
@@ -0,0 +1,62 @@
+ <refentry id="V4L2-PIX-FMT-UV8">
+ <refmeta>
+ <refentrytitle>V4L2_PIX_FMT_UV8 ('UV8')</refentrytitle>
+ &manvol;
+ </refmeta>
+ <refnamediv>
+ <refname><constant>V4L2_PIX_FMT_UV8</constant></refname>
+ <refpurpose>UV plane interleaved</refpurpose>
+ </refnamediv>
+ <refsect1>
+ <title>Description</title>
+ <para>In this format there is no Y plane, Only CbCr plane. ie
+ (UV interleaved)</para>
+ <example>
+ <title>
+ <constant>V4L2_PIX_FMT_UV8</constant>
+ pixel image
+ </title>
+
+ <formalpara>
+ <title>Byte Order.</title>
+ <para>Each cell is one byte.
+ <informaltable frame="none">
+ <tgroup cols="5" align="center">
+ <colspec align="left" colwidth="2*" />
+ <tbody valign="top">
+ <row>
+ <entry>start&nbsp;+&nbsp;0:</entry>
+ <entry>Cb<subscript>00</subscript></entry>
+ <entry>Cr<subscript>00</subscript></entry>
+ <entry>Cb<subscript>01</subscript></entry>
+ <entry>Cr<subscript>01</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;4:</entry>
+ <entry>Cb<subscript>10</subscript></entry>
+ <entry>Cr<subscript>10</subscript></entry>
+ <entry>Cb<subscript>11</subscript></entry>
+ <entry>Cr<subscript>11</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;8:</entry>
+ <entry>Cb<subscript>20</subscript></entry>
+ <entry>Cr<subscript>20</subscript></entry>
+ <entry>Cb<subscript>21</subscript></entry>
+ <entry>Cr<subscript>21</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;12:</entry>
+ <entry>Cb<subscript>30</subscript></entry>
+ <entry>Cr<subscript>30</subscript></entry>
+ <entry>Cb<subscript>31</subscript></entry>
+ <entry>Cr<subscript>31</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+ </example>
+ </refsect1>
+ </refentry>
diff --git a/Documentation/DocBook/media/v4l/pixfmt-uyvy.xml b/Documentation/DocBook/media/v4l/pixfmt-uyvy.xml
new file mode 100644
index 000000000..b1f6801a1
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/pixfmt-uyvy.xml
@@ -0,0 +1,120 @@
+ <refentry id="V4L2-PIX-FMT-UYVY">
+ <refmeta>
+ <refentrytitle>V4L2_PIX_FMT_UYVY ('UYVY')</refentrytitle>
+ &manvol;
+ </refmeta>
+ <refnamediv>
+ <refname><constant>V4L2_PIX_FMT_UYVY</constant></refname>
+ <refpurpose>Variation of
+<constant>V4L2_PIX_FMT_YUYV</constant> with different order of samples
+in memory</refpurpose>
+ </refnamediv>
+ <refsect1>
+ <title>Description</title>
+
+ <para>In this format each four bytes is two pixels. Each four
+bytes is two Y's, a Cb and a Cr. Each Y goes to one of the pixels, and
+the Cb and Cr belong to both pixels. As you can see, the Cr and Cb
+components have half the horizontal resolution of the Y
+component.</para>
+
+ <example>
+ <title><constant>V4L2_PIX_FMT_UYVY</constant> 4 &times; 4
+pixel image</title>
+
+ <formalpara>
+ <title>Byte Order.</title>
+ <para>Each cell is one byte.
+ <informaltable frame="none">
+ <tgroup cols="9" align="center">
+ <colspec align="left" colwidth="2*" />
+ <tbody valign="top">
+ <row>
+ <entry>start&nbsp;+&nbsp;0:</entry>
+ <entry>Cb<subscript>00</subscript></entry>
+ <entry>Y'<subscript>00</subscript></entry>
+ <entry>Cr<subscript>00</subscript></entry>
+ <entry>Y'<subscript>01</subscript></entry>
+ <entry>Cb<subscript>01</subscript></entry>
+ <entry>Y'<subscript>02</subscript></entry>
+ <entry>Cr<subscript>01</subscript></entry>
+ <entry>Y'<subscript>03</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;8:</entry>
+ <entry>Cb<subscript>10</subscript></entry>
+ <entry>Y'<subscript>10</subscript></entry>
+ <entry>Cr<subscript>10</subscript></entry>
+ <entry>Y'<subscript>11</subscript></entry>
+ <entry>Cb<subscript>11</subscript></entry>
+ <entry>Y'<subscript>12</subscript></entry>
+ <entry>Cr<subscript>11</subscript></entry>
+ <entry>Y'<subscript>13</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;16:</entry>
+ <entry>Cb<subscript>20</subscript></entry>
+ <entry>Y'<subscript>20</subscript></entry>
+ <entry>Cr<subscript>20</subscript></entry>
+ <entry>Y'<subscript>21</subscript></entry>
+ <entry>Cb<subscript>21</subscript></entry>
+ <entry>Y'<subscript>22</subscript></entry>
+ <entry>Cr<subscript>21</subscript></entry>
+ <entry>Y'<subscript>23</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;24:</entry>
+ <entry>Cb<subscript>30</subscript></entry>
+ <entry>Y'<subscript>30</subscript></entry>
+ <entry>Cr<subscript>30</subscript></entry>
+ <entry>Y'<subscript>31</subscript></entry>
+ <entry>Cb<subscript>31</subscript></entry>
+ <entry>Y'<subscript>32</subscript></entry>
+ <entry>Cr<subscript>31</subscript></entry>
+ <entry>Y'<subscript>33</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+
+ <formalpara>
+ <title>Color Sample Location.</title>
+ <para>
+ <informaltable frame="none">
+ <tgroup cols="7" align="center">
+ <tbody valign="top">
+ <row>
+ <entry></entry>
+ <entry>0</entry><entry></entry><entry>1</entry><entry></entry>
+ <entry>2</entry><entry></entry><entry>3</entry>
+ </row>
+ <row>
+ <entry>0</entry>
+ <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry>C</entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry>1</entry>
+ <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry>C</entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry>2</entry>
+ <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry>C</entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry>3</entry>
+ <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry>C</entry><entry>Y</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+ </example>
+ </refsect1>
+ </refentry>
diff --git a/Documentation/DocBook/media/v4l/pixfmt-vyuy.xml b/Documentation/DocBook/media/v4l/pixfmt-vyuy.xml
new file mode 100644
index 000000000..82803408b
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/pixfmt-vyuy.xml
@@ -0,0 +1,120 @@
+ <refentry id="V4L2-PIX-FMT-VYUY">
+ <refmeta>
+ <refentrytitle>V4L2_PIX_FMT_VYUY ('VYUY')</refentrytitle>
+ &manvol;
+ </refmeta>
+ <refnamediv>
+ <refname><constant>V4L2_PIX_FMT_VYUY</constant></refname>
+ <refpurpose>Variation of
+<constant>V4L2_PIX_FMT_YUYV</constant> with different order of samples
+in memory</refpurpose>
+ </refnamediv>
+ <refsect1>
+ <title>Description</title>
+
+ <para>In this format each four bytes is two pixels. Each four
+bytes is two Y's, a Cb and a Cr. Each Y goes to one of the pixels, and
+the Cb and Cr belong to both pixels. As you can see, the Cr and Cb
+components have half the horizontal resolution of the Y
+component.</para>
+
+ <example>
+ <title><constant>V4L2_PIX_FMT_VYUY</constant> 4 &times; 4
+pixel image</title>
+
+ <formalpara>
+ <title>Byte Order.</title>
+ <para>Each cell is one byte.
+ <informaltable frame="none">
+ <tgroup cols="9" align="center">
+ <colspec align="left" colwidth="2*" />
+ <tbody valign="top">
+ <row>
+ <entry>start&nbsp;+&nbsp;0:</entry>
+ <entry>Cr<subscript>00</subscript></entry>
+ <entry>Y'<subscript>00</subscript></entry>
+ <entry>Cb<subscript>00</subscript></entry>
+ <entry>Y'<subscript>01</subscript></entry>
+ <entry>Cr<subscript>01</subscript></entry>
+ <entry>Y'<subscript>02</subscript></entry>
+ <entry>Cb<subscript>01</subscript></entry>
+ <entry>Y'<subscript>03</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;8:</entry>
+ <entry>Cr<subscript>10</subscript></entry>
+ <entry>Y'<subscript>10</subscript></entry>
+ <entry>Cb<subscript>10</subscript></entry>
+ <entry>Y'<subscript>11</subscript></entry>
+ <entry>Cr<subscript>11</subscript></entry>
+ <entry>Y'<subscript>12</subscript></entry>
+ <entry>Cb<subscript>11</subscript></entry>
+ <entry>Y'<subscript>13</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;16:</entry>
+ <entry>Cr<subscript>20</subscript></entry>
+ <entry>Y'<subscript>20</subscript></entry>
+ <entry>Cb<subscript>20</subscript></entry>
+ <entry>Y'<subscript>21</subscript></entry>
+ <entry>Cr<subscript>21</subscript></entry>
+ <entry>Y'<subscript>22</subscript></entry>
+ <entry>Cb<subscript>21</subscript></entry>
+ <entry>Y'<subscript>23</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;24:</entry>
+ <entry>Cr<subscript>30</subscript></entry>
+ <entry>Y'<subscript>30</subscript></entry>
+ <entry>Cb<subscript>30</subscript></entry>
+ <entry>Y'<subscript>31</subscript></entry>
+ <entry>Cr<subscript>31</subscript></entry>
+ <entry>Y'<subscript>32</subscript></entry>
+ <entry>Cb<subscript>31</subscript></entry>
+ <entry>Y'<subscript>33</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+
+ <formalpara>
+ <title>Color Sample Location.</title>
+ <para>
+ <informaltable frame="none">
+ <tgroup cols="7" align="center">
+ <tbody valign="top">
+ <row>
+ <entry></entry>
+ <entry>0</entry><entry></entry><entry>1</entry><entry></entry>
+ <entry>2</entry><entry></entry><entry>3</entry>
+ </row>
+ <row>
+ <entry>0</entry>
+ <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry>C</entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry>1</entry>
+ <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry>C</entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry>2</entry>
+ <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry>C</entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry>3</entry>
+ <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry>C</entry><entry>Y</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+ </example>
+ </refsect1>
+ </refentry>
diff --git a/Documentation/DocBook/media/v4l/pixfmt-y10.xml b/Documentation/DocBook/media/v4l/pixfmt-y10.xml
new file mode 100644
index 000000000..d065043db
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/pixfmt-y10.xml
@@ -0,0 +1,79 @@
+<refentry id="V4L2-PIX-FMT-Y10">
+ <refmeta>
+ <refentrytitle>V4L2_PIX_FMT_Y10 ('Y10 ')</refentrytitle>
+ &manvol;
+ </refmeta>
+ <refnamediv>
+ <refname><constant>V4L2_PIX_FMT_Y10</constant></refname>
+ <refpurpose>Grey-scale image</refpurpose>
+ </refnamediv>
+ <refsect1>
+ <title>Description</title>
+
+ <para>This is a grey-scale image with a depth of 10 bits per pixel. Pixels
+are stored in 16-bit words with unused high bits padded with 0. The least
+significant byte is stored at lower memory addresses (little-endian).</para>
+
+ <example>
+ <title><constant>V4L2_PIX_FMT_Y10</constant> 4 &times; 4
+pixel image</title>
+
+ <formalpara>
+ <title>Byte Order.</title>
+ <para>Each cell is one byte.
+ <informaltable frame="none">
+ <tgroup cols="9" align="center">
+ <colspec align="left" colwidth="2*" />
+ <tbody valign="top">
+ <row>
+ <entry>start&nbsp;+&nbsp;0:</entry>
+ <entry>Y'<subscript>00low</subscript></entry>
+ <entry>Y'<subscript>00high</subscript></entry>
+ <entry>Y'<subscript>01low</subscript></entry>
+ <entry>Y'<subscript>01high</subscript></entry>
+ <entry>Y'<subscript>02low</subscript></entry>
+ <entry>Y'<subscript>02high</subscript></entry>
+ <entry>Y'<subscript>03low</subscript></entry>
+ <entry>Y'<subscript>03high</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;8:</entry>
+ <entry>Y'<subscript>10low</subscript></entry>
+ <entry>Y'<subscript>10high</subscript></entry>
+ <entry>Y'<subscript>11low</subscript></entry>
+ <entry>Y'<subscript>11high</subscript></entry>
+ <entry>Y'<subscript>12low</subscript></entry>
+ <entry>Y'<subscript>12high</subscript></entry>
+ <entry>Y'<subscript>13low</subscript></entry>
+ <entry>Y'<subscript>13high</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;16:</entry>
+ <entry>Y'<subscript>20low</subscript></entry>
+ <entry>Y'<subscript>20high</subscript></entry>
+ <entry>Y'<subscript>21low</subscript></entry>
+ <entry>Y'<subscript>21high</subscript></entry>
+ <entry>Y'<subscript>22low</subscript></entry>
+ <entry>Y'<subscript>22high</subscript></entry>
+ <entry>Y'<subscript>23low</subscript></entry>
+ <entry>Y'<subscript>23high</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;24:</entry>
+ <entry>Y'<subscript>30low</subscript></entry>
+ <entry>Y'<subscript>30high</subscript></entry>
+ <entry>Y'<subscript>31low</subscript></entry>
+ <entry>Y'<subscript>31high</subscript></entry>
+ <entry>Y'<subscript>32low</subscript></entry>
+ <entry>Y'<subscript>32high</subscript></entry>
+ <entry>Y'<subscript>33low</subscript></entry>
+ <entry>Y'<subscript>33high</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+ </example>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/pixfmt-y10b.xml b/Documentation/DocBook/media/v4l/pixfmt-y10b.xml
new file mode 100644
index 000000000..adb0ad808
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/pixfmt-y10b.xml
@@ -0,0 +1,43 @@
+<refentry id="V4L2-PIX-FMT-Y10BPACK">
+ <refmeta>
+ <refentrytitle>V4L2_PIX_FMT_Y10BPACK ('Y10B')</refentrytitle>
+ &manvol;
+ </refmeta>
+ <refnamediv>
+ <refname><constant>V4L2_PIX_FMT_Y10BPACK</constant></refname>
+ <refpurpose>Grey-scale image as a bit-packed array</refpurpose>
+ </refnamediv>
+ <refsect1>
+ <title>Description</title>
+
+ <para>This is a packed grey-scale image format with a depth of 10 bits per
+ pixel. Pixels are stored in a bit-packed array of 10bit bits per pixel,
+ with no padding between them and with the most significant bits coming
+ first from the left.</para>
+
+ <example>
+ <title><constant>V4L2_PIX_FMT_Y10BPACK</constant> 4 pixel data stream taking 5 bytes</title>
+
+ <formalpara>
+ <title>Bit-packed representation</title>
+ <para>pixels cross the byte boundary and have a ratio of 5 bytes for each 4
+ pixels.
+ <informaltable frame="all">
+ <tgroup cols="5" align="center">
+ <colspec align="left" colwidth="2*" />
+ <tbody valign="top">
+ <row>
+ <entry>Y'<subscript>00[9:2]</subscript></entry>
+ <entry>Y'<subscript>00[1:0]</subscript>Y'<subscript>01[9:4]</subscript></entry>
+ <entry>Y'<subscript>01[3:0]</subscript>Y'<subscript>02[9:6]</subscript></entry>
+ <entry>Y'<subscript>02[5:0]</subscript>Y'<subscript>03[9:8]</subscript></entry>
+ <entry>Y'<subscript>03[7:0]</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+ </example>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/pixfmt-y12.xml b/Documentation/DocBook/media/v4l/pixfmt-y12.xml
new file mode 100644
index 000000000..ff417b858
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/pixfmt-y12.xml
@@ -0,0 +1,79 @@
+<refentry id="V4L2-PIX-FMT-Y12">
+ <refmeta>
+ <refentrytitle>V4L2_PIX_FMT_Y12 ('Y12 ')</refentrytitle>
+ &manvol;
+ </refmeta>
+ <refnamediv>
+ <refname><constant>V4L2_PIX_FMT_Y12</constant></refname>
+ <refpurpose>Grey-scale image</refpurpose>
+ </refnamediv>
+ <refsect1>
+ <title>Description</title>
+
+ <para>This is a grey-scale image with a depth of 12 bits per pixel. Pixels
+are stored in 16-bit words with unused high bits padded with 0. The least
+significant byte is stored at lower memory addresses (little-endian).</para>
+
+ <example>
+ <title><constant>V4L2_PIX_FMT_Y12</constant> 4 &times; 4
+pixel image</title>
+
+ <formalpara>
+ <title>Byte Order.</title>
+ <para>Each cell is one byte.
+ <informaltable frame="none">
+ <tgroup cols="9" align="center">
+ <colspec align="left" colwidth="2*" />
+ <tbody valign="top">
+ <row>
+ <entry>start&nbsp;+&nbsp;0:</entry>
+ <entry>Y'<subscript>00low</subscript></entry>
+ <entry>Y'<subscript>00high</subscript></entry>
+ <entry>Y'<subscript>01low</subscript></entry>
+ <entry>Y'<subscript>01high</subscript></entry>
+ <entry>Y'<subscript>02low</subscript></entry>
+ <entry>Y'<subscript>02high</subscript></entry>
+ <entry>Y'<subscript>03low</subscript></entry>
+ <entry>Y'<subscript>03high</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;8:</entry>
+ <entry>Y'<subscript>10low</subscript></entry>
+ <entry>Y'<subscript>10high</subscript></entry>
+ <entry>Y'<subscript>11low</subscript></entry>
+ <entry>Y'<subscript>11high</subscript></entry>
+ <entry>Y'<subscript>12low</subscript></entry>
+ <entry>Y'<subscript>12high</subscript></entry>
+ <entry>Y'<subscript>13low</subscript></entry>
+ <entry>Y'<subscript>13high</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;16:</entry>
+ <entry>Y'<subscript>20low</subscript></entry>
+ <entry>Y'<subscript>20high</subscript></entry>
+ <entry>Y'<subscript>21low</subscript></entry>
+ <entry>Y'<subscript>21high</subscript></entry>
+ <entry>Y'<subscript>22low</subscript></entry>
+ <entry>Y'<subscript>22high</subscript></entry>
+ <entry>Y'<subscript>23low</subscript></entry>
+ <entry>Y'<subscript>23high</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;24:</entry>
+ <entry>Y'<subscript>30low</subscript></entry>
+ <entry>Y'<subscript>30high</subscript></entry>
+ <entry>Y'<subscript>31low</subscript></entry>
+ <entry>Y'<subscript>31high</subscript></entry>
+ <entry>Y'<subscript>32low</subscript></entry>
+ <entry>Y'<subscript>32high</subscript></entry>
+ <entry>Y'<subscript>33low</subscript></entry>
+ <entry>Y'<subscript>33high</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+ </example>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/pixfmt-y16.xml b/Documentation/DocBook/media/v4l/pixfmt-y16.xml
new file mode 100644
index 000000000..ff4f727d5
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/pixfmt-y16.xml
@@ -0,0 +1,81 @@
+<refentry id="V4L2-PIX-FMT-Y16">
+ <refmeta>
+ <refentrytitle>V4L2_PIX_FMT_Y16 ('Y16 ')</refentrytitle>
+ &manvol;
+ </refmeta>
+ <refnamediv>
+ <refname><constant>V4L2_PIX_FMT_Y16</constant></refname>
+ <refpurpose>Grey-scale image</refpurpose>
+ </refnamediv>
+ <refsect1>
+ <title>Description</title>
+
+ <para>This is a grey-scale image with a depth of 16 bits per
+pixel. The least significant byte is stored at lower memory addresses
+(little-endian). Note the actual sampling precision may be lower than
+16 bits, for example 10 bits per pixel with values in range 0 to
+1023.</para>
+
+ <example>
+ <title><constant>V4L2_PIX_FMT_Y16</constant> 4 &times; 4
+pixel image</title>
+
+ <formalpara>
+ <title>Byte Order.</title>
+ <para>Each cell is one byte.
+ <informaltable frame="none">
+ <tgroup cols="9" align="center">
+ <colspec align="left" colwidth="2*" />
+ <tbody valign="top">
+ <row>
+ <entry>start&nbsp;+&nbsp;0:</entry>
+ <entry>Y'<subscript>00low</subscript></entry>
+ <entry>Y'<subscript>00high</subscript></entry>
+ <entry>Y'<subscript>01low</subscript></entry>
+ <entry>Y'<subscript>01high</subscript></entry>
+ <entry>Y'<subscript>02low</subscript></entry>
+ <entry>Y'<subscript>02high</subscript></entry>
+ <entry>Y'<subscript>03low</subscript></entry>
+ <entry>Y'<subscript>03high</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;8:</entry>
+ <entry>Y'<subscript>10low</subscript></entry>
+ <entry>Y'<subscript>10high</subscript></entry>
+ <entry>Y'<subscript>11low</subscript></entry>
+ <entry>Y'<subscript>11high</subscript></entry>
+ <entry>Y'<subscript>12low</subscript></entry>
+ <entry>Y'<subscript>12high</subscript></entry>
+ <entry>Y'<subscript>13low</subscript></entry>
+ <entry>Y'<subscript>13high</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;16:</entry>
+ <entry>Y'<subscript>20low</subscript></entry>
+ <entry>Y'<subscript>20high</subscript></entry>
+ <entry>Y'<subscript>21low</subscript></entry>
+ <entry>Y'<subscript>21high</subscript></entry>
+ <entry>Y'<subscript>22low</subscript></entry>
+ <entry>Y'<subscript>22high</subscript></entry>
+ <entry>Y'<subscript>23low</subscript></entry>
+ <entry>Y'<subscript>23high</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;24:</entry>
+ <entry>Y'<subscript>30low</subscript></entry>
+ <entry>Y'<subscript>30high</subscript></entry>
+ <entry>Y'<subscript>31low</subscript></entry>
+ <entry>Y'<subscript>31high</subscript></entry>
+ <entry>Y'<subscript>32low</subscript></entry>
+ <entry>Y'<subscript>32high</subscript></entry>
+ <entry>Y'<subscript>33low</subscript></entry>
+ <entry>Y'<subscript>33high</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+ </example>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/pixfmt-y41p.xml b/Documentation/DocBook/media/v4l/pixfmt-y41p.xml
new file mode 100644
index 000000000..98dcb91d2
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/pixfmt-y41p.xml
@@ -0,0 +1,149 @@
+ <refentry id="V4L2-PIX-FMT-Y41P">
+ <refmeta>
+ <refentrytitle>V4L2_PIX_FMT_Y41P ('Y41P')</refentrytitle>
+ &manvol;
+ </refmeta>
+ <refnamediv>
+ <refname><constant>V4L2_PIX_FMT_Y41P</constant></refname>
+ <refpurpose>Format with &frac14; horizontal chroma
+resolution, also known as YUV 4:1:1</refpurpose>
+ </refnamediv>
+ <refsect1>
+ <title>Description</title>
+
+ <para>In this format each 12 bytes is eight pixels. In the
+twelve bytes are two CbCr pairs and eight Y's. The first CbCr pair
+goes with the first four Y's, and the second CbCr pair goes with the
+other four Y's. The Cb and Cr components have one fourth the
+horizontal resolution of the Y component.</para>
+
+ <para>Do not confuse this format with <link
+linkend="V4L2-PIX-FMT-YUV411P"><constant>V4L2_PIX_FMT_YUV411P</constant></link>.
+Y41P is derived from "YUV 4:1:1 <emphasis>packed</emphasis>", while
+YUV411P stands for "YUV 4:1:1 <emphasis>planar</emphasis>".</para>
+
+ <example>
+ <title><constant>V4L2_PIX_FMT_Y41P</constant> 8 &times; 4
+pixel image</title>
+
+ <formalpara>
+ <title>Byte Order</title>
+ <para>Each cell is one byte.
+ <informaltable frame="none">
+ <tgroup cols="13" align="center">
+ <colspec align="left" colwidth="2*" />
+ <tbody valign="top">
+ <row>
+ <entry>start&nbsp;+&nbsp;0:</entry>
+ <entry>Cb<subscript>00</subscript></entry>
+ <entry>Y'<subscript>00</subscript></entry>
+ <entry>Cr<subscript>00</subscript></entry>
+ <entry>Y'<subscript>01</subscript></entry>
+ <entry>Cb<subscript>01</subscript></entry>
+ <entry>Y'<subscript>02</subscript></entry>
+ <entry>Cr<subscript>01</subscript></entry>
+ <entry>Y'<subscript>03</subscript></entry>
+ <entry>Y'<subscript>04</subscript></entry>
+ <entry>Y'<subscript>05</subscript></entry>
+ <entry>Y'<subscript>06</subscript></entry>
+ <entry>Y'<subscript>07</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;12:</entry>
+ <entry>Cb<subscript>10</subscript></entry>
+ <entry>Y'<subscript>10</subscript></entry>
+ <entry>Cr<subscript>10</subscript></entry>
+ <entry>Y'<subscript>11</subscript></entry>
+ <entry>Cb<subscript>11</subscript></entry>
+ <entry>Y'<subscript>12</subscript></entry>
+ <entry>Cr<subscript>11</subscript></entry>
+ <entry>Y'<subscript>13</subscript></entry>
+ <entry>Y'<subscript>14</subscript></entry>
+ <entry>Y'<subscript>15</subscript></entry>
+ <entry>Y'<subscript>16</subscript></entry>
+ <entry>Y'<subscript>17</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;24:</entry>
+ <entry>Cb<subscript>20</subscript></entry>
+ <entry>Y'<subscript>20</subscript></entry>
+ <entry>Cr<subscript>20</subscript></entry>
+ <entry>Y'<subscript>21</subscript></entry>
+ <entry>Cb<subscript>21</subscript></entry>
+ <entry>Y'<subscript>22</subscript></entry>
+ <entry>Cr<subscript>21</subscript></entry>
+ <entry>Y'<subscript>23</subscript></entry>
+ <entry>Y'<subscript>24</subscript></entry>
+ <entry>Y'<subscript>25</subscript></entry>
+ <entry>Y'<subscript>26</subscript></entry>
+ <entry>Y'<subscript>27</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;36:</entry>
+ <entry>Cb<subscript>30</subscript></entry>
+ <entry>Y'<subscript>30</subscript></entry>
+ <entry>Cr<subscript>30</subscript></entry>
+ <entry>Y'<subscript>31</subscript></entry>
+ <entry>Cb<subscript>31</subscript></entry>
+ <entry>Y'<subscript>32</subscript></entry>
+ <entry>Cr<subscript>31</subscript></entry>
+ <entry>Y'<subscript>33</subscript></entry>
+ <entry>Y'<subscript>34</subscript></entry>
+ <entry>Y'<subscript>35</subscript></entry>
+ <entry>Y'<subscript>36</subscript></entry>
+ <entry>Y'<subscript>37</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable></para>
+ </formalpara>
+
+ <formalpara>
+ <title>Color Sample Location.</title>
+ <para>
+ <informaltable frame="none">
+ <tgroup cols="15" align="center">
+ <tbody valign="top">
+ <row>
+ <entry></entry>
+ <entry>0</entry><entry></entry><entry>1</entry><entry></entry>
+ <entry>2</entry><entry></entry><entry>3</entry><entry></entry>
+ <entry>4</entry><entry></entry><entry>5</entry><entry></entry>
+ <entry>6</entry><entry></entry><entry>7</entry>
+ </row>
+ <row>
+ <entry>0</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry>C</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry>C</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry>1</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry>C</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry>C</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry>2</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry>C</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry>C</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry>3</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry>C</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry>C</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+ </example>
+ </refsect1>
+ </refentry>
diff --git a/Documentation/DocBook/media/v4l/pixfmt-yuv410.xml b/Documentation/DocBook/media/v4l/pixfmt-yuv410.xml
new file mode 100644
index 000000000..0869dce5f
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/pixfmt-yuv410.xml
@@ -0,0 +1,133 @@
+ <refentry>
+ <refmeta>
+ <refentrytitle>V4L2_PIX_FMT_YVU410 ('YVU9'), V4L2_PIX_FMT_YUV410 ('YUV9')</refentrytitle>
+ &manvol;
+ </refmeta>
+ <refnamediv>
+ <refname id="V4L2-PIX-FMT-YVU410"><constant>V4L2_PIX_FMT_YVU410</constant></refname>
+ <refname id="V4L2-PIX-FMT-YUV410"><constant>V4L2_PIX_FMT_YUV410</constant></refname>
+ <refpurpose>Planar formats with &frac14; horizontal and
+vertical chroma resolution, also known as YUV 4:1:0</refpurpose>
+ </refnamediv>
+ <refsect1>
+ <title>Description</title>
+
+ <para>These are planar formats, as opposed to a packed format.
+The three components are separated into three sub-images or planes.
+The Y plane is first. The Y plane has one byte per pixel. For
+<constant>V4L2_PIX_FMT_YVU410</constant>, the Cr plane immediately
+follows the Y plane in memory. The Cr plane is &frac14; the width and
+&frac14; the height of the Y plane (and of the image). Each Cr belongs
+to 16 pixels, a four-by-four square of the image. Following the Cr
+plane is the Cb plane, just like the Cr plane.
+<constant>V4L2_PIX_FMT_YUV410</constant> is the same, except the Cb
+plane comes first, then the Cr plane.</para>
+
+ <para>If the Y plane has pad bytes after each row, then the Cr
+and Cb planes have &frac14; as many pad bytes after their rows. In
+other words, four Cx rows (including padding) are exactly as long as
+one Y row (including padding).</para>
+
+ <example>
+ <title><constant>V4L2_PIX_FMT_YVU410</constant> 4 &times; 4
+pixel image</title>
+
+ <formalpara>
+ <title>Byte Order.</title>
+ <para>Each cell is one byte.
+ <informaltable frame="none">
+ <tgroup cols="5" align="center">
+ <colspec align="left" colwidth="2*" />
+ <tbody valign="top">
+ <row>
+ <entry>start&nbsp;+&nbsp;0:</entry>
+ <entry>Y'<subscript>00</subscript></entry>
+ <entry>Y'<subscript>01</subscript></entry>
+ <entry>Y'<subscript>02</subscript></entry>
+ <entry>Y'<subscript>03</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;4:</entry>
+ <entry>Y'<subscript>10</subscript></entry>
+ <entry>Y'<subscript>11</subscript></entry>
+ <entry>Y'<subscript>12</subscript></entry>
+ <entry>Y'<subscript>13</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;8:</entry>
+ <entry>Y'<subscript>20</subscript></entry>
+ <entry>Y'<subscript>21</subscript></entry>
+ <entry>Y'<subscript>22</subscript></entry>
+ <entry>Y'<subscript>23</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;12:</entry>
+ <entry>Y'<subscript>30</subscript></entry>
+ <entry>Y'<subscript>31</subscript></entry>
+ <entry>Y'<subscript>32</subscript></entry>
+ <entry>Y'<subscript>33</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;16:</entry>
+ <entry>Cr<subscript>00</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;17:</entry>
+ <entry>Cb<subscript>00</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+
+ <formalpara>
+ <title>Color Sample Location.</title>
+ <para>
+ <informaltable frame="none">
+ <tgroup cols="7" align="center">
+ <tbody valign="top">
+ <row>
+ <entry></entry>
+ <entry>0</entry><entry></entry><entry>1</entry><entry></entry>
+ <entry>2</entry><entry></entry><entry>3</entry>
+ </row>
+ <row>
+ <entry>0</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry></entry>
+ </row>
+ <row>
+ <entry>1</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry><entry></entry><entry></entry><entry>C</entry>
+ <entry></entry><entry></entry><entry></entry>
+ </row>
+ <row>
+ <entry>2</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry></entry>
+ </row>
+ <row>
+ <entry>3</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+ </example>
+ </refsect1>
+ </refentry>
diff --git a/Documentation/DocBook/media/v4l/pixfmt-yuv411p.xml b/Documentation/DocBook/media/v4l/pixfmt-yuv411p.xml
new file mode 100644
index 000000000..086dc731b
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/pixfmt-yuv411p.xml
@@ -0,0 +1,147 @@
+ <refentry id="V4L2-PIX-FMT-YUV411P">
+ <refmeta>
+ <refentrytitle>V4L2_PIX_FMT_YUV411P ('411P')</refentrytitle>
+ &manvol;
+ </refmeta>
+ <refnamediv>
+ <refname><constant>V4L2_PIX_FMT_YUV411P</constant></refname>
+ <refpurpose>Format with &frac14; horizontal chroma resolution,
+also known as YUV 4:1:1. Planar layout as opposed to
+<constant>V4L2_PIX_FMT_Y41P</constant></refpurpose>
+ </refnamediv>
+ <refsect1>
+ <title>Description</title>
+
+ <para>This format is not commonly used. This is a planar
+format similar to the 4:2:2 planar format except with half as many
+chroma. The three components are separated into three sub-images or
+planes. The Y plane is first. The Y plane has one byte per pixel. The
+Cb plane immediately follows the Y plane in memory. The Cb plane is
+&frac14; the width of the Y plane (and of the image). Each Cb belongs
+to 4 pixels all on the same row. For example,
+Cb<subscript>0</subscript> belongs to Y'<subscript>00</subscript>,
+Y'<subscript>01</subscript>, Y'<subscript>02</subscript> and
+Y'<subscript>03</subscript>. Following the Cb plane is the Cr plane,
+just like the Cb plane.</para>
+
+ <para>If the Y plane has pad bytes after each row, then the Cr
+and Cb planes have &frac14; as many pad bytes after their rows. In
+other words, four C x rows (including padding) is exactly as long as
+one Y row (including padding).</para>
+
+ <example>
+ <title><constant>V4L2_PIX_FMT_YUV411P</constant> 4 &times; 4
+pixel image</title>
+
+ <formalpara>
+ <title>Byte Order.</title>
+ <para>Each cell is one byte.
+ <informaltable frame="none">
+ <tgroup cols="5" align="center">
+ <colspec align="left" colwidth="2*" />
+ <tbody valign="top">
+ <row>
+ <entry>start&nbsp;+&nbsp;0:</entry>
+ <entry>Y'<subscript>00</subscript></entry>
+ <entry>Y'<subscript>01</subscript></entry>
+ <entry>Y'<subscript>02</subscript></entry>
+ <entry>Y'<subscript>03</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;4:</entry>
+ <entry>Y'<subscript>10</subscript></entry>
+ <entry>Y'<subscript>11</subscript></entry>
+ <entry>Y'<subscript>12</subscript></entry>
+ <entry>Y'<subscript>13</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;8:</entry>
+ <entry>Y'<subscript>20</subscript></entry>
+ <entry>Y'<subscript>21</subscript></entry>
+ <entry>Y'<subscript>22</subscript></entry>
+ <entry>Y'<subscript>23</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;12:</entry>
+ <entry>Y'<subscript>30</subscript></entry>
+ <entry>Y'<subscript>31</subscript></entry>
+ <entry>Y'<subscript>32</subscript></entry>
+ <entry>Y'<subscript>33</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;16:</entry>
+ <entry>Cb<subscript>00</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;17:</entry>
+ <entry>Cb<subscript>10</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;18:</entry>
+ <entry>Cb<subscript>20</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;19:</entry>
+ <entry>Cb<subscript>30</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;20:</entry>
+ <entry>Cr<subscript>00</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;21:</entry>
+ <entry>Cr<subscript>10</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;22:</entry>
+ <entry>Cr<subscript>20</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;23:</entry>
+ <entry>Cr<subscript>30</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+
+ <formalpara>
+ <title>Color Sample Location.</title>
+ <para>
+ <informaltable frame="none">
+ <tgroup cols="7" align="center">
+ <tbody valign="top">
+ <row>
+ <entry></entry>
+ <entry>0</entry><entry></entry><entry>1</entry><entry></entry>
+ <entry>2</entry><entry></entry><entry>3</entry>
+ </row>
+ <row>
+ <entry>0</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry>C</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry>1</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry>C</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry>2</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry>C</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry>3</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry>C</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+ </example>
+ </refsect1>
+ </refentry>
diff --git a/Documentation/DocBook/media/v4l/pixfmt-yuv420.xml b/Documentation/DocBook/media/v4l/pixfmt-yuv420.xml
new file mode 100644
index 000000000..48649fac1
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/pixfmt-yuv420.xml
@@ -0,0 +1,149 @@
+ <refentry>
+ <refmeta>
+ <refentrytitle>V4L2_PIX_FMT_YVU420 ('YV12'), V4L2_PIX_FMT_YUV420 ('YU12')</refentrytitle>
+ &manvol;
+ </refmeta>
+ <refnamediv>
+ <refname id="V4L2-PIX-FMT-YVU420"><constant>V4L2_PIX_FMT_YVU420</constant></refname>
+ <refname id="V4L2-PIX-FMT-YUV420"><constant>V4L2_PIX_FMT_YUV420</constant></refname>
+ <refpurpose>Planar formats with &frac12; horizontal and
+vertical chroma resolution, also known as YUV 4:2:0</refpurpose>
+ </refnamediv>
+ <refsect1>
+ <title>Description</title>
+
+ <para>These are planar formats, as opposed to a packed format.
+The three components are separated into three sub- images or planes.
+The Y plane is first. The Y plane has one byte per pixel. For
+<constant>V4L2_PIX_FMT_YVU420</constant>, the Cr plane immediately
+follows the Y plane in memory. The Cr plane is half the width and half
+the height of the Y plane (and of the image). Each Cr belongs to four
+pixels, a two-by-two square of the image. For example,
+Cr<subscript>0</subscript> belongs to Y'<subscript>00</subscript>,
+Y'<subscript>01</subscript>, Y'<subscript>10</subscript>, and
+Y'<subscript>11</subscript>. Following the Cr plane is the Cb plane,
+just like the Cr plane. <constant>V4L2_PIX_FMT_YUV420</constant> is
+the same except the Cb plane comes first, then the Cr plane.</para>
+
+ <para>If the Y plane has pad bytes after each row, then the Cr
+and Cb planes have half as many pad bytes after their rows. In other
+words, two Cx rows (including padding) is exactly as long as one Y row
+(including padding).</para>
+
+ <example>
+ <title><constant>V4L2_PIX_FMT_YVU420</constant> 4 &times; 4
+pixel image</title>
+
+ <formalpara>
+ <title>Byte Order.</title>
+ <para>Each cell is one byte.
+ <informaltable frame="none">
+ <tgroup cols="5" align="center">
+ <colspec align="left" colwidth="2*" />
+ <tbody valign="top">
+ <row>
+ <entry>start&nbsp;+&nbsp;0:</entry>
+ <entry>Y'<subscript>00</subscript></entry>
+ <entry>Y'<subscript>01</subscript></entry>
+ <entry>Y'<subscript>02</subscript></entry>
+ <entry>Y'<subscript>03</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;4:</entry>
+ <entry>Y'<subscript>10</subscript></entry>
+ <entry>Y'<subscript>11</subscript></entry>
+ <entry>Y'<subscript>12</subscript></entry>
+ <entry>Y'<subscript>13</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;8:</entry>
+ <entry>Y'<subscript>20</subscript></entry>
+ <entry>Y'<subscript>21</subscript></entry>
+ <entry>Y'<subscript>22</subscript></entry>
+ <entry>Y'<subscript>23</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;12:</entry>
+ <entry>Y'<subscript>30</subscript></entry>
+ <entry>Y'<subscript>31</subscript></entry>
+ <entry>Y'<subscript>32</subscript></entry>
+ <entry>Y'<subscript>33</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;16:</entry>
+ <entry>Cr<subscript>00</subscript></entry>
+ <entry>Cr<subscript>01</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;18:</entry>
+ <entry>Cr<subscript>10</subscript></entry>
+ <entry>Cr<subscript>11</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;20:</entry>
+ <entry>Cb<subscript>00</subscript></entry>
+ <entry>Cb<subscript>01</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;22:</entry>
+ <entry>Cb<subscript>10</subscript></entry>
+ <entry>Cb<subscript>11</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+
+ <formalpara>
+ <title>Color Sample Location.</title>
+ <para>
+ <informaltable frame="none">
+ <tgroup cols="7" align="center">
+ <tbody valign="top">
+ <row>
+ <entry></entry>
+ <entry>0</entry><entry></entry><entry>1</entry><entry></entry>
+ <entry>2</entry><entry></entry><entry>3</entry>
+ </row>
+ <row>
+ <entry>0</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry><entry>C</entry><entry></entry><entry></entry>
+ <entry></entry><entry>C</entry><entry></entry>
+ </row>
+ <row>
+ <entry>1</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry></entry>
+ </row>
+ <row>
+ <entry>2</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry><entry>C</entry><entry></entry><entry></entry>
+ <entry></entry><entry>C</entry><entry></entry>
+ </row>
+ <row>
+ <entry>3</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+ </example>
+ </refsect1>
+ </refentry>
diff --git a/Documentation/DocBook/media/v4l/pixfmt-yuv420m.xml b/Documentation/DocBook/media/v4l/pixfmt-yuv420m.xml
new file mode 100644
index 000000000..e781cc617
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/pixfmt-yuv420m.xml
@@ -0,0 +1,154 @@
+ <refentry id="V4L2-PIX-FMT-YUV420M">
+ <refmeta>
+ <refentrytitle>V4L2_PIX_FMT_YUV420M ('YM12')</refentrytitle>
+ &manvol;
+ </refmeta>
+ <refnamediv>
+ <refname> <constant>V4L2_PIX_FMT_YUV420M</constant></refname>
+ <refpurpose>Variation of <constant>V4L2_PIX_FMT_YUV420</constant>
+ with planes non contiguous in memory. </refpurpose>
+ </refnamediv>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>This is a multi-planar format, as opposed to a packed format.
+The three components are separated into three sub- images or planes.
+
+The Y plane is first. The Y plane has one byte per pixel. The Cb data
+constitutes the second plane which is half the width and half
+the height of the Y plane (and of the image). Each Cb belongs to four
+pixels, a two-by-two square of the image. For example,
+Cb<subscript>0</subscript> belongs to Y'<subscript>00</subscript>,
+Y'<subscript>01</subscript>, Y'<subscript>10</subscript>, and
+Y'<subscript>11</subscript>. The Cr data, just like the Cb plane, is
+in the third plane. </para>
+
+ <para>If the Y plane has pad bytes after each row, then the Cb
+and Cr planes have half as many pad bytes after their rows. In other
+words, two Cx rows (including padding) is exactly as long as one Y row
+(including padding).</para>
+
+ <para><constant>V4L2_PIX_FMT_YUV420M</constant> is intended to be
+used only in drivers and applications that support the multi-planar API,
+described in <xref linkend="planar-apis"/>. </para>
+
+ <example>
+ <title><constant>V4L2_PIX_FMT_YUV420M</constant> 4 &times; 4
+pixel image</title>
+
+ <formalpara>
+ <title>Byte Order.</title>
+ <para>Each cell is one byte.
+ <informaltable frame="none">
+ <tgroup cols="5" align="center">
+ <colspec align="left" colwidth="2*" />
+ <tbody valign="top">
+ <row>
+ <entry>start0&nbsp;+&nbsp;0:</entry>
+ <entry>Y'<subscript>00</subscript></entry>
+ <entry>Y'<subscript>01</subscript></entry>
+ <entry>Y'<subscript>02</subscript></entry>
+ <entry>Y'<subscript>03</subscript></entry>
+ </row>
+ <row>
+ <entry>start0&nbsp;+&nbsp;4:</entry>
+ <entry>Y'<subscript>10</subscript></entry>
+ <entry>Y'<subscript>11</subscript></entry>
+ <entry>Y'<subscript>12</subscript></entry>
+ <entry>Y'<subscript>13</subscript></entry>
+ </row>
+ <row>
+ <entry>start0&nbsp;+&nbsp;8:</entry>
+ <entry>Y'<subscript>20</subscript></entry>
+ <entry>Y'<subscript>21</subscript></entry>
+ <entry>Y'<subscript>22</subscript></entry>
+ <entry>Y'<subscript>23</subscript></entry>
+ </row>
+ <row>
+ <entry>start0&nbsp;+&nbsp;12:</entry>
+ <entry>Y'<subscript>30</subscript></entry>
+ <entry>Y'<subscript>31</subscript></entry>
+ <entry>Y'<subscript>32</subscript></entry>
+ <entry>Y'<subscript>33</subscript></entry>
+ </row>
+ <row><entry></entry></row>
+ <row>
+ <entry>start1&nbsp;+&nbsp;0:</entry>
+ <entry>Cb<subscript>00</subscript></entry>
+ <entry>Cb<subscript>01</subscript></entry>
+ </row>
+ <row>
+ <entry>start1&nbsp;+&nbsp;2:</entry>
+ <entry>Cb<subscript>10</subscript></entry>
+ <entry>Cb<subscript>11</subscript></entry>
+ </row>
+ <row><entry></entry></row>
+ <row>
+ <entry>start2&nbsp;+&nbsp;0:</entry>
+ <entry>Cr<subscript>00</subscript></entry>
+ <entry>Cr<subscript>01</subscript></entry>
+ </row>
+ <row>
+ <entry>start2&nbsp;+&nbsp;2:</entry>
+ <entry>Cr<subscript>10</subscript></entry>
+ <entry>Cr<subscript>11</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+
+ <formalpara>
+ <title>Color Sample Location.</title>
+ <para>
+ <informaltable frame="none">
+ <tgroup cols="7" align="center">
+ <tbody valign="top">
+ <row>
+ <entry></entry>
+ <entry>0</entry><entry></entry><entry>1</entry><entry></entry>
+ <entry>2</entry><entry></entry><entry>3</entry>
+ </row>
+ <row>
+ <entry>0</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry><entry>C</entry><entry></entry><entry></entry>
+ <entry></entry><entry>C</entry><entry></entry>
+ </row>
+ <row>
+ <entry>1</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry></entry>
+ </row>
+ <row>
+ <entry>2</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry><entry>C</entry><entry></entry><entry></entry>
+ <entry></entry><entry>C</entry><entry></entry>
+ </row>
+ <row>
+ <entry>3</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+ </example>
+ </refsect1>
+ </refentry>
diff --git a/Documentation/DocBook/media/v4l/pixfmt-yuv422p.xml b/Documentation/DocBook/media/v4l/pixfmt-yuv422p.xml
new file mode 100644
index 000000000..4ce6463fe
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/pixfmt-yuv422p.xml
@@ -0,0 +1,153 @@
+ <refentry id="V4L2-PIX-FMT-YUV422P">
+ <refmeta>
+ <refentrytitle>V4L2_PIX_FMT_YUV422P ('422P')</refentrytitle>
+ &manvol;
+ </refmeta>
+ <refnamediv>
+ <refname><constant>V4L2_PIX_FMT_YUV422P</constant></refname>
+ <refpurpose>Format with &frac12; horizontal chroma resolution,
+also known as YUV 4:2:2. Planar layout as opposed to
+<constant>V4L2_PIX_FMT_YUYV</constant></refpurpose>
+ </refnamediv>
+ <refsect1>
+ <title>Description</title>
+
+ <para>This format is not commonly used. This is a planar
+version of the YUYV format. The three components are separated into
+three sub-images or planes. The Y plane is first. The Y plane has one
+byte per pixel. The Cb plane immediately follows the Y plane in
+memory. The Cb plane is half the width of the Y plane (and of the
+image). Each Cb belongs to two pixels. For example,
+Cb<subscript>0</subscript> belongs to Y'<subscript>00</subscript>,
+Y'<subscript>01</subscript>. Following the Cb plane is the Cr plane,
+just like the Cb plane.</para>
+
+ <para>If the Y plane has pad bytes after each row, then the Cr
+and Cb planes have half as many pad bytes after their rows. In other
+words, two Cx rows (including padding) is exactly as long as one Y row
+(including padding).</para>
+
+ <example>
+ <title><constant>V4L2_PIX_FMT_YUV422P</constant> 4 &times; 4
+pixel image</title>
+
+ <formalpara>
+ <title>Byte Order.</title>
+ <para>Each cell is one byte.
+ <informaltable frame="none">
+ <tgroup cols="5" align="center">
+ <colspec align="left" colwidth="2*" />
+ <tbody valign="top">
+ <row>
+ <entry>start&nbsp;+&nbsp;0:</entry>
+ <entry>Y'<subscript>00</subscript></entry>
+ <entry>Y'<subscript>01</subscript></entry>
+ <entry>Y'<subscript>02</subscript></entry>
+ <entry>Y'<subscript>03</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;4:</entry>
+ <entry>Y'<subscript>10</subscript></entry>
+ <entry>Y'<subscript>11</subscript></entry>
+ <entry>Y'<subscript>12</subscript></entry>
+ <entry>Y'<subscript>13</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;8:</entry>
+ <entry>Y'<subscript>20</subscript></entry>
+ <entry>Y'<subscript>21</subscript></entry>
+ <entry>Y'<subscript>22</subscript></entry>
+ <entry>Y'<subscript>23</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;12:</entry>
+ <entry>Y'<subscript>30</subscript></entry>
+ <entry>Y'<subscript>31</subscript></entry>
+ <entry>Y'<subscript>32</subscript></entry>
+ <entry>Y'<subscript>33</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;16:</entry>
+ <entry>Cb<subscript>00</subscript></entry>
+ <entry>Cb<subscript>01</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;18:</entry>
+ <entry>Cb<subscript>10</subscript></entry>
+ <entry>Cb<subscript>11</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;20:</entry>
+ <entry>Cb<subscript>20</subscript></entry>
+ <entry>Cb<subscript>21</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;22:</entry>
+ <entry>Cb<subscript>30</subscript></entry>
+ <entry>Cb<subscript>31</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;24:</entry>
+ <entry>Cr<subscript>00</subscript></entry>
+ <entry>Cr<subscript>01</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;26:</entry>
+ <entry>Cr<subscript>10</subscript></entry>
+ <entry>Cr<subscript>11</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;28:</entry>
+ <entry>Cr<subscript>20</subscript></entry>
+ <entry>Cr<subscript>21</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;30:</entry>
+ <entry>Cr<subscript>30</subscript></entry>
+ <entry>Cr<subscript>31</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+
+ <formalpara>
+ <title>Color Sample Location.</title>
+ <para>
+ <informaltable frame="none">
+ <tgroup cols="7" align="center">
+ <tbody valign="top">
+ <row>
+ <entry></entry>
+ <entry>0</entry><entry></entry><entry>1</entry><entry></entry>
+ <entry>2</entry><entry></entry><entry>3</entry>
+ </row>
+ <row>
+ <entry>0</entry>
+ <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry>C</entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry>1</entry>
+ <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry>C</entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry>2</entry>
+ <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry>C</entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry>3</entry>
+ <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry>C</entry><entry>Y</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+ </example>
+ </refsect1>
+ </refentry>
diff --git a/Documentation/DocBook/media/v4l/pixfmt-yuyv.xml b/Documentation/DocBook/media/v4l/pixfmt-yuyv.xml
new file mode 100644
index 000000000..583840922
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/pixfmt-yuyv.xml
@@ -0,0 +1,120 @@
+ <refentry id="V4L2-PIX-FMT-YUYV">
+ <refmeta>
+ <refentrytitle>V4L2_PIX_FMT_YUYV ('YUYV')</refentrytitle>
+ &manvol;
+ </refmeta>
+ <refnamediv>
+ <refname><constant>V4L2_PIX_FMT_YUYV</constant></refname>
+ <refpurpose>Packed format with &frac12; horizontal chroma
+resolution, also known as YUV 4:2:2</refpurpose>
+ </refnamediv>
+ <refsect1>
+ <title>Description</title>
+
+ <para>In this format each four bytes is two pixels. Each four
+bytes is two Y's, a Cb and a Cr. Each Y goes to one of the pixels, and
+the Cb and Cr belong to both pixels. As you can see, the Cr and Cb
+components have half the horizontal resolution of the Y component.
+<constant>V4L2_PIX_FMT_YUYV </constant> is known in the Windows
+environment as YUY2.</para>
+
+ <example>
+ <title><constant>V4L2_PIX_FMT_YUYV</constant> 4 &times; 4
+pixel image</title>
+
+ <formalpara>
+ <title>Byte Order.</title>
+ <para>Each cell is one byte.
+ <informaltable frame="none">
+ <tgroup cols="9" align="center">
+ <colspec align="left" colwidth="2*" />
+ <tbody valign="top">
+ <row>
+ <entry>start&nbsp;+&nbsp;0:</entry>
+ <entry>Y'<subscript>00</subscript></entry>
+ <entry>Cb<subscript>00</subscript></entry>
+ <entry>Y'<subscript>01</subscript></entry>
+ <entry>Cr<subscript>00</subscript></entry>
+ <entry>Y'<subscript>02</subscript></entry>
+ <entry>Cb<subscript>01</subscript></entry>
+ <entry>Y'<subscript>03</subscript></entry>
+ <entry>Cr<subscript>01</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;8:</entry>
+ <entry>Y'<subscript>10</subscript></entry>
+ <entry>Cb<subscript>10</subscript></entry>
+ <entry>Y'<subscript>11</subscript></entry>
+ <entry>Cr<subscript>10</subscript></entry>
+ <entry>Y'<subscript>12</subscript></entry>
+ <entry>Cb<subscript>11</subscript></entry>
+ <entry>Y'<subscript>13</subscript></entry>
+ <entry>Cr<subscript>11</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;16:</entry>
+ <entry>Y'<subscript>20</subscript></entry>
+ <entry>Cb<subscript>20</subscript></entry>
+ <entry>Y'<subscript>21</subscript></entry>
+ <entry>Cr<subscript>20</subscript></entry>
+ <entry>Y'<subscript>22</subscript></entry>
+ <entry>Cb<subscript>21</subscript></entry>
+ <entry>Y'<subscript>23</subscript></entry>
+ <entry>Cr<subscript>21</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;24:</entry>
+ <entry>Y'<subscript>30</subscript></entry>
+ <entry>Cb<subscript>30</subscript></entry>
+ <entry>Y'<subscript>31</subscript></entry>
+ <entry>Cr<subscript>30</subscript></entry>
+ <entry>Y'<subscript>32</subscript></entry>
+ <entry>Cb<subscript>31</subscript></entry>
+ <entry>Y'<subscript>33</subscript></entry>
+ <entry>Cr<subscript>31</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+
+ <formalpara>
+ <title>Color Sample Location.</title>
+ <para>
+ <informaltable frame="none">
+ <tgroup cols="7" align="center">
+ <tbody valign="top">
+ <row>
+ <entry></entry>
+ <entry>0</entry><entry></entry><entry>1</entry><entry></entry>
+ <entry>2</entry><entry></entry><entry>3</entry>
+ </row>
+ <row>
+ <entry>0</entry>
+ <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry>C</entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry>1</entry>
+ <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry>C</entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry>2</entry>
+ <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry>C</entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry>3</entry>
+ <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry>C</entry><entry>Y</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+ </example>
+ </refsect1>
+ </refentry>
diff --git a/Documentation/DocBook/media/v4l/pixfmt-yvu420m.xml b/Documentation/DocBook/media/v4l/pixfmt-yvu420m.xml
new file mode 100644
index 000000000..233066790
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/pixfmt-yvu420m.xml
@@ -0,0 +1,154 @@
+ <refentry id="V4L2-PIX-FMT-YVU420M">
+ <refmeta>
+ <refentrytitle>V4L2_PIX_FMT_YVU420M ('YM21')</refentrytitle>
+ &manvol;
+ </refmeta>
+ <refnamediv>
+ <refname> <constant>V4L2_PIX_FMT_YVU420M</constant></refname>
+ <refpurpose>Variation of <constant>V4L2_PIX_FMT_YVU420</constant>
+ with planes non contiguous in memory. </refpurpose>
+ </refnamediv>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>This is a multi-planar format, as opposed to a packed format.
+The three components are separated into three sub-images or planes.
+
+The Y plane is first. The Y plane has one byte per pixel. The Cr data
+constitutes the second plane which is half the width and half
+the height of the Y plane (and of the image). Each Cr belongs to four
+pixels, a two-by-two square of the image. For example,
+Cr<subscript>0</subscript> belongs to Y'<subscript>00</subscript>,
+Y'<subscript>01</subscript>, Y'<subscript>10</subscript>, and
+Y'<subscript>11</subscript>. The Cb data, just like the Cr plane, constitutes
+the third plane. </para>
+
+ <para>If the Y plane has pad bytes after each row, then the Cr
+and Cb planes have half as many pad bytes after their rows. In other
+words, two Cx rows (including padding) is exactly as long as one Y row
+(including padding).</para>
+
+ <para><constant>V4L2_PIX_FMT_YVU420M</constant> is intended to be
+used only in drivers and applications that support the multi-planar API,
+described in <xref linkend="planar-apis"/>. </para>
+
+ <example>
+ <title><constant>V4L2_PIX_FMT_YVU420M</constant> 4 &times; 4
+pixel image</title>
+
+ <formalpara>
+ <title>Byte Order.</title>
+ <para>Each cell is one byte.
+ <informaltable frame="none">
+ <tgroup cols="5" align="center">
+ <colspec align="left" colwidth="2*" />
+ <tbody valign="top">
+ <row>
+ <entry>start0&nbsp;+&nbsp;0:</entry>
+ <entry>Y'<subscript>00</subscript></entry>
+ <entry>Y'<subscript>01</subscript></entry>
+ <entry>Y'<subscript>02</subscript></entry>
+ <entry>Y'<subscript>03</subscript></entry>
+ </row>
+ <row>
+ <entry>start0&nbsp;+&nbsp;4:</entry>
+ <entry>Y'<subscript>10</subscript></entry>
+ <entry>Y'<subscript>11</subscript></entry>
+ <entry>Y'<subscript>12</subscript></entry>
+ <entry>Y'<subscript>13</subscript></entry>
+ </row>
+ <row>
+ <entry>start0&nbsp;+&nbsp;8:</entry>
+ <entry>Y'<subscript>20</subscript></entry>
+ <entry>Y'<subscript>21</subscript></entry>
+ <entry>Y'<subscript>22</subscript></entry>
+ <entry>Y'<subscript>23</subscript></entry>
+ </row>
+ <row>
+ <entry>start0&nbsp;+&nbsp;12:</entry>
+ <entry>Y'<subscript>30</subscript></entry>
+ <entry>Y'<subscript>31</subscript></entry>
+ <entry>Y'<subscript>32</subscript></entry>
+ <entry>Y'<subscript>33</subscript></entry>
+ </row>
+ <row><entry></entry></row>
+ <row>
+ <entry>start1&nbsp;+&nbsp;0:</entry>
+ <entry>Cr<subscript>00</subscript></entry>
+ <entry>Cr<subscript>01</subscript></entry>
+ </row>
+ <row>
+ <entry>start1&nbsp;+&nbsp;2:</entry>
+ <entry>Cr<subscript>10</subscript></entry>
+ <entry>Cr<subscript>11</subscript></entry>
+ </row>
+ <row><entry></entry></row>
+ <row>
+ <entry>start2&nbsp;+&nbsp;0:</entry>
+ <entry>Cb<subscript>00</subscript></entry>
+ <entry>Cb<subscript>01</subscript></entry>
+ </row>
+ <row>
+ <entry>start2&nbsp;+&nbsp;2:</entry>
+ <entry>Cb<subscript>10</subscript></entry>
+ <entry>Cb<subscript>11</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+
+ <formalpara>
+ <title>Color Sample Location.</title>
+ <para>
+ <informaltable frame="none">
+ <tgroup cols="7" align="center">
+ <tbody valign="top">
+ <row>
+ <entry></entry>
+ <entry>0</entry><entry></entry><entry>1</entry><entry></entry>
+ <entry>2</entry><entry></entry><entry>3</entry>
+ </row>
+ <row>
+ <entry>0</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry><entry>C</entry><entry></entry><entry></entry>
+ <entry></entry><entry>C</entry><entry></entry>
+ </row>
+ <row>
+ <entry>1</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry></entry>
+ </row>
+ <row>
+ <entry>2</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry><entry>C</entry><entry></entry><entry></entry>
+ <entry></entry><entry>C</entry><entry></entry>
+ </row>
+ <row>
+ <entry>3</entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry></entry><entry>Y</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+ </example>
+ </refsect1>
+ </refentry>
diff --git a/Documentation/DocBook/media/v4l/pixfmt-yvyu.xml b/Documentation/DocBook/media/v4l/pixfmt-yvyu.xml
new file mode 100644
index 000000000..bfffdc76d
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/pixfmt-yvyu.xml
@@ -0,0 +1,120 @@
+ <refentry id="V4L2-PIX-FMT-YVYU">
+ <refmeta>
+ <refentrytitle>V4L2_PIX_FMT_YVYU ('YVYU')</refentrytitle>
+ &manvol;
+ </refmeta>
+ <refnamediv>
+ <refname><constant>V4L2_PIX_FMT_YVYU</constant></refname>
+ <refpurpose>Variation of
+<constant>V4L2_PIX_FMT_YUYV</constant> with different order of samples
+in memory</refpurpose>
+ </refnamediv>
+ <refsect1>
+ <title>Description</title>
+
+ <para>In this format each four bytes is two pixels. Each four
+bytes is two Y's, a Cb and a Cr. Each Y goes to one of the pixels, and
+the Cb and Cr belong to both pixels. As you can see, the Cr and Cb
+components have half the horizontal resolution of the Y
+component.</para>
+
+ <example>
+ <title><constant>V4L2_PIX_FMT_YVYU</constant> 4 &times; 4
+pixel image</title>
+
+ <formalpara>
+ <title>Byte Order.</title>
+ <para>Each cell is one byte.
+ <informaltable frame="none">
+ <tgroup cols="9" align="center">
+ <colspec align="left" colwidth="2*" />
+ <tbody valign="top">
+ <row>
+ <entry>start&nbsp;+&nbsp;0:</entry>
+ <entry>Y'<subscript>00</subscript></entry>
+ <entry>Cr<subscript>00</subscript></entry>
+ <entry>Y'<subscript>01</subscript></entry>
+ <entry>Cb<subscript>00</subscript></entry>
+ <entry>Y'<subscript>02</subscript></entry>
+ <entry>Cr<subscript>01</subscript></entry>
+ <entry>Y'<subscript>03</subscript></entry>
+ <entry>Cb<subscript>01</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;8:</entry>
+ <entry>Y'<subscript>10</subscript></entry>
+ <entry>Cr<subscript>10</subscript></entry>
+ <entry>Y'<subscript>11</subscript></entry>
+ <entry>Cb<subscript>10</subscript></entry>
+ <entry>Y'<subscript>12</subscript></entry>
+ <entry>Cr<subscript>11</subscript></entry>
+ <entry>Y'<subscript>13</subscript></entry>
+ <entry>Cb<subscript>11</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;16:</entry>
+ <entry>Y'<subscript>20</subscript></entry>
+ <entry>Cr<subscript>20</subscript></entry>
+ <entry>Y'<subscript>21</subscript></entry>
+ <entry>Cb<subscript>20</subscript></entry>
+ <entry>Y'<subscript>22</subscript></entry>
+ <entry>Cr<subscript>21</subscript></entry>
+ <entry>Y'<subscript>23</subscript></entry>
+ <entry>Cb<subscript>21</subscript></entry>
+ </row>
+ <row>
+ <entry>start&nbsp;+&nbsp;24:</entry>
+ <entry>Y'<subscript>30</subscript></entry>
+ <entry>Cr<subscript>30</subscript></entry>
+ <entry>Y'<subscript>31</subscript></entry>
+ <entry>Cb<subscript>30</subscript></entry>
+ <entry>Y'<subscript>32</subscript></entry>
+ <entry>Cr<subscript>31</subscript></entry>
+ <entry>Y'<subscript>33</subscript></entry>
+ <entry>Cb<subscript>31</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+
+ <formalpara>
+ <title>Color Sample Location.</title>
+ <para>
+ <informaltable frame="none">
+ <tgroup cols="7" align="center">
+ <tbody valign="top">
+ <row>
+ <entry></entry>
+ <entry>0</entry><entry></entry><entry>1</entry><entry></entry>
+ <entry>2</entry><entry></entry><entry>3</entry>
+ </row>
+ <row>
+ <entry>0</entry>
+ <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry>C</entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry>1</entry>
+ <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry>C</entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry>2</entry>
+ <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry>C</entry><entry>Y</entry>
+ </row>
+ <row>
+ <entry>3</entry>
+ <entry>Y</entry><entry>C</entry><entry>Y</entry><entry></entry>
+ <entry>Y</entry><entry>C</entry><entry>Y</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
+ </para>
+ </formalpara>
+ </example>
+ </refsect1>
+ </refentry>
diff --git a/Documentation/DocBook/media/v4l/pixfmt.xml b/Documentation/DocBook/media/v4l/pixfmt.xml
new file mode 100644
index 000000000..fcde4e202
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/pixfmt.xml
@@ -0,0 +1,1801 @@
+ <title>Image Formats</title>
+
+ <para>The V4L2 API was primarily designed for devices exchanging
+image data with applications. The
+<structname>v4l2_pix_format</structname> and <structname>v4l2_pix_format_mplane
+</structname> structures define the format and layout of an image in memory.
+The former is used with the single-planar API, while the latter is used with the
+multi-planar version (see <xref linkend="planar-apis"/>). Image formats are
+negotiated with the &VIDIOC-S-FMT; ioctl. (The explanations here focus on video
+capturing and output, for overlay frame buffer formats see also
+&VIDIOC-G-FBUF;.)</para>
+
+<section>
+ <title>Single-planar format structure</title>
+ <table pgwide="1" frame="none" id="v4l2-pix-format">
+ <title>struct <structname>v4l2_pix_format</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>width</structfield></entry>
+ <entry>Image width in pixels.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>height</structfield></entry>
+ <entry>Image height in pixels. If <structfield>field</structfield> is
+ one of <constant>V4L2_FIELD_TOP</constant>, <constant>V4L2_FIELD_BOTTOM</constant>
+ or <constant>V4L2_FIELD_ALTERNATE</constant> then height refers to the
+ number of lines in the field, otherwise it refers to the number of
+ lines in the frame (which is twice the field height for interlaced
+ formats).</entry>
+ </row>
+ <row>
+ <entry spanname="hspan">Applications set these fields to
+request an image size, drivers return the closest possible values. In
+case of planar formats the <structfield>width</structfield> and
+<structfield>height</structfield> applies to the largest plane. To
+avoid ambiguities drivers must return values rounded up to a multiple
+of the scale factor of any smaller planes. For example when the image
+format is YUV 4:2:0, <structfield>width</structfield> and
+<structfield>height</structfield> must be multiples of two.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>pixelformat</structfield></entry>
+ <entry>The pixel format or type of compression, set by the
+application. This is a little endian <link
+linkend="v4l2-fourcc">four character code</link>. V4L2 defines
+standard RGB formats in <xref linkend="rgb-formats" />, YUV formats in <xref
+linkend="yuv-formats" />, and reserved codes in <xref
+linkend="reserved-formats" /></entry>
+ </row>
+ <row>
+ <entry>&v4l2-field;</entry>
+ <entry><structfield>field</structfield></entry>
+ <entry>Video images are typically interlaced. Applications
+can request to capture or output only the top or bottom field, or both
+fields interlaced or sequentially stored in one buffer or alternating
+in separate buffers. Drivers return the actual field order selected.
+For more details on fields see <xref linkend="field-order" />.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>bytesperline</structfield></entry>
+ <entry>Distance in bytes between the leftmost pixels in two
+adjacent lines.</entry>
+ </row>
+ <row>
+ <entry spanname="hspan"><para>Both applications and drivers
+can set this field to request padding bytes at the end of each line.
+Drivers however may ignore the value requested by the application,
+returning <structfield>width</structfield> times bytes per pixel or a
+larger value required by the hardware. That implies applications can
+just set this field to zero to get a reasonable
+default.</para><para>Video hardware may access padding bytes,
+therefore they must reside in accessible memory. Consider cases where
+padding bytes after the last line of an image cross a system page
+boundary. Input devices may write padding bytes, the value is
+undefined. Output devices ignore the contents of padding
+bytes.</para><para>When the image format is planar the
+<structfield>bytesperline</structfield> value applies to the first
+plane and is divided by the same factor as the
+<structfield>width</structfield> field for the other planes. For
+example the Cb and Cr planes of a YUV 4:2:0 image have half as many
+padding bytes following each line as the Y plane. To avoid ambiguities
+drivers must return a <structfield>bytesperline</structfield> value
+rounded up to a multiple of the scale factor.</para>
+<para>For compressed formats the <structfield>bytesperline</structfield>
+value makes no sense. Applications and drivers must set this to 0 in
+that case.</para></entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>sizeimage</structfield></entry>
+ <entry>Size in bytes of the buffer to hold a complete image,
+set by the driver. Usually this is
+<structfield>bytesperline</structfield> times
+<structfield>height</structfield>. When the image consists of variable
+length compressed data this is the maximum number of bytes required to
+hold an image.</entry>
+ </row>
+ <row>
+ <entry>&v4l2-colorspace;</entry>
+ <entry><structfield>colorspace</structfield></entry>
+ <entry>This information supplements the
+<structfield>pixelformat</structfield> and must be set by the driver for
+capture streams and by the application for output streams,
+see <xref linkend="colorspaces" />.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>priv</structfield></entry>
+ <entry><para>This field indicates whether the remaining fields of the
+<structname>v4l2_pix_format</structname> structure, also called the extended
+fields, are valid. When set to <constant>V4L2_PIX_FMT_PRIV_MAGIC</constant>, it
+indicates that the extended fields have been correctly initialized. When set to
+any other value it indicates that the extended fields contain undefined values.
+</para>
+<para>Applications that wish to use the pixel format extended fields must first
+ensure that the feature is supported by querying the device for the
+<link linkend="querycap"><constant>V4L2_CAP_EXT_PIX_FORMAT</constant></link>
+capability. If the capability isn't set the pixel format extended fields are not
+supported and using the extended fields will lead to undefined results.</para>
+<para>To use the extended fields, applications must set the
+<structfield>priv</structfield> field to
+<constant>V4L2_PIX_FMT_PRIV_MAGIC</constant>, initialize all the extended fields
+and zero the unused bytes of the <structname>v4l2_format</structname>
+<structfield>raw_data</structfield> field.</para>
+<para>When the <structfield>priv</structfield> field isn't set to
+<constant>V4L2_PIX_FMT_PRIV_MAGIC</constant> drivers must act as if all the
+extended fields were set to zero. On return drivers must set the
+<structfield>priv</structfield> field to
+<constant>V4L2_PIX_FMT_PRIV_MAGIC</constant> and all the extended fields to
+applicable values.</para></entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>flags</structfield></entry>
+ <entry>Flags set by the application or driver, see <xref
+linkend="format-flags" />.</entry>
+ </row>
+ <row>
+ <entry>&v4l2-ycbcr-encoding;</entry>
+ <entry><structfield>ycbcr_enc</structfield></entry>
+ <entry>This information supplements the
+<structfield>colorspace</structfield> and must be set by the driver for
+capture streams and by the application for output streams,
+see <xref linkend="colorspaces" />.</entry>
+ </row>
+ <row>
+ <entry>&v4l2-quantization;</entry>
+ <entry><structfield>quantization</structfield></entry>
+ <entry>This information supplements the
+<structfield>colorspace</structfield> and must be set by the driver for
+capture streams and by the application for output streams,
+see <xref linkend="colorspaces" />.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+</section>
+
+<section>
+ <title>Multi-planar format structures</title>
+ <para>The <structname>v4l2_plane_pix_format</structname> structures define
+ size and layout for each of the planes in a multi-planar format.
+ The <structname>v4l2_pix_format_mplane</structname> structure contains
+ information common to all planes (such as image width and height) and
+ an array of <structname>v4l2_plane_pix_format</structname> structures,
+ describing all planes of that format.</para>
+ <table pgwide="1" frame="none" id="v4l2-plane-pix-format">
+ <title>struct <structname>v4l2_plane_pix_format</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>sizeimage</structfield></entry>
+ <entry>Maximum size in bytes required for image data in this plane.
+ </entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>bytesperline</structfield></entry>
+ <entry>Distance in bytes between the leftmost pixels in two adjacent
+ lines. See &v4l2-pix-format;.</entry>
+ </row>
+ <row>
+ <entry>__u16</entry>
+ <entry><structfield>reserved[6]</structfield></entry>
+ <entry>Reserved for future extensions. Should be zeroed by the
+ application.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ <table pgwide="1" frame="none" id="v4l2-pix-format-mplane">
+ <title>struct <structname>v4l2_pix_format_mplane</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>width</structfield></entry>
+ <entry>Image width in pixels. See &v4l2-pix-format;.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>height</structfield></entry>
+ <entry>Image height in pixels. See &v4l2-pix-format;.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>pixelformat</structfield></entry>
+ <entry>The pixel format. Both single- and multi-planar four character
+codes can be used.</entry>
+ </row>
+ <row>
+ <entry>&v4l2-field;</entry>
+ <entry><structfield>field</structfield></entry>
+ <entry>See &v4l2-pix-format;.</entry>
+ </row>
+ <row>
+ <entry>&v4l2-colorspace;</entry>
+ <entry><structfield>colorspace</structfield></entry>
+ <entry>See &v4l2-pix-format;.</entry>
+ </row>
+ <row>
+ <entry>&v4l2-plane-pix-format;</entry>
+ <entry><structfield>plane_fmt[VIDEO_MAX_PLANES]</structfield></entry>
+ <entry>An array of structures describing format of each plane this
+ pixel format consists of. The number of valid entries in this array
+ has to be put in the <structfield>num_planes</structfield>
+ field.</entry>
+ </row>
+ <row>
+ <entry>__u8</entry>
+ <entry><structfield>num_planes</structfield></entry>
+ <entry>Number of planes (i.e. separate memory buffers) for this format
+ and the number of valid entries in the
+ <structfield>plane_fmt</structfield> array.</entry>
+ </row>
+ <row>
+ <entry>__u8</entry>
+ <entry><structfield>flags</structfield></entry>
+ <entry>Flags set by the application or driver, see <xref
+linkend="format-flags" />.</entry>
+ </row>
+ <row>
+ <entry>&v4l2-ycbcr-encoding;</entry>
+ <entry><structfield>ycbcr_enc</structfield></entry>
+ <entry>This information supplements the
+<structfield>colorspace</structfield> and must be set by the driver for
+capture streams and by the application for output streams,
+see <xref linkend="colorspaces" />.</entry>
+ </row>
+ <row>
+ <entry>&v4l2-quantization;</entry>
+ <entry><structfield>quantization</structfield></entry>
+ <entry>This information supplements the
+<structfield>colorspace</structfield> and must be set by the driver for
+capture streams and by the application for output streams,
+see <xref linkend="colorspaces" />.</entry>
+ </row>
+ <row>
+ <entry>__u8</entry>
+ <entry><structfield>reserved[8]</structfield></entry>
+ <entry>Reserved for future extensions. Should be zeroed by the
+ application.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+</section>
+
+ <section>
+ <title>Standard Image Formats</title>
+
+ <para>In order to exchange images between drivers and
+applications, it is necessary to have standard image data formats
+which both sides will interpret the same way. V4L2 includes several
+such formats, and this section is intended to be an unambiguous
+specification of the standard image data formats in V4L2.</para>
+
+ <para>V4L2 drivers are not limited to these formats, however.
+Driver-specific formats are possible. In that case the application may
+depend on a codec to convert images to one of the standard formats
+when needed. But the data can still be stored and retrieved in the
+proprietary format. For example, a device may support a proprietary
+compressed format. Applications can still capture and save the data in
+the compressed format, saving much disk space, and later use a codec
+to convert the images to the X Windows screen format when the video is
+to be displayed.</para>
+
+ <para>Even so, ultimately, some standard formats are needed, so
+the V4L2 specification would not be complete without well-defined
+standard formats.</para>
+
+ <para>The V4L2 standard formats are mainly uncompressed formats. The
+pixels are always arranged in memory from left to right, and from top
+to bottom. The first byte of data in the image buffer is always for
+the leftmost pixel of the topmost row. Following that is the pixel
+immediately to its right, and so on until the end of the top row of
+pixels. Following the rightmost pixel of the row there may be zero or
+more bytes of padding to guarantee that each row of pixel data has a
+certain alignment. Following the pad bytes, if any, is data for the
+leftmost pixel of the second row from the top, and so on. The last row
+has just as many pad bytes after it as the other rows.</para>
+
+ <para>In V4L2 each format has an identifier which looks like
+<constant>PIX_FMT_XXX</constant>, defined in the <link
+linkend="videodev">videodev2.h</link> header file. These identifiers
+represent <link linkend="v4l2-fourcc">four character (FourCC) codes</link>
+which are also listed below, however they are not the same as those
+used in the Windows world.</para>
+
+ <para>For some formats, data is stored in separate, discontiguous
+memory buffers. Those formats are identified by a separate set of FourCC codes
+and are referred to as "multi-planar formats". For example, a YUV422 frame is
+normally stored in one memory buffer, but it can also be placed in two or three
+separate buffers, with Y component in one buffer and CbCr components in another
+in the 2-planar version or with each component in its own buffer in the
+3-planar case. Those sub-buffers are referred to as "planes".</para>
+ </section>
+
+ <section id="colorspaces">
+ <title>Colorspaces</title>
+
+ <para>'Color' is a very complex concept and depends on physics, chemistry and
+biology. Just because you have three numbers that describe the 'red', 'green'
+and 'blue' components of the color of a pixel does not mean that you can accurately
+display that color. A colorspace defines what it actually <emphasis>means</emphasis>
+to have an RGB value of e.g. (255,&nbsp;0,&nbsp;0). That is, which color should be
+reproduced on the screen in a perfectly calibrated environment.</para>
+
+ <para>In order to do that we first need to have a good definition of
+color, i.e. some way to uniquely and unambiguously define a color so that someone
+else can reproduce it. Human color vision is trichromatic since the human eye has
+color receptors that are sensitive to three different wavelengths of light. Hence
+the need to use three numbers to describe color. Be glad you are not a mantis shrimp
+as those are sensitive to 12 different wavelengths, so instead of RGB we would be
+using the ABCDEFGHIJKL colorspace...</para>
+
+ <para>Color exists only in the eye and brain and is the result of how strongly
+color receptors are stimulated. This is based on the Spectral
+Power Distribution (SPD) which is a graph showing the intensity (radiant power)
+of the light at wavelengths covering the visible spectrum as it enters the eye.
+The science of colorimetry is about the relationship between the SPD and color as
+perceived by the human brain.</para>
+
+ <para>Since the human eye has only three color receptors it is perfectly
+possible that different SPDs will result in the same stimulation of those receptors
+and are perceived as the same color, even though the SPD of the light is
+different.</para>
+
+ <para>In the 1920s experiments were devised to determine the relationship
+between SPDs and the perceived color and that resulted in the CIE 1931 standard
+that defines spectral weighting functions that model the perception of color.
+Specifically that standard defines functions that can take an SPD and calculate
+the stimulus for each color receptor. After some further mathematical transforms
+these stimuli are known as the <emphasis>CIE XYZ tristimulus</emphasis> values
+and these X, Y and Z values describe a color as perceived by a human unambiguously.
+These X, Y and Z values are all in the range [0&hellip;1].</para>
+
+ <para>The Y value in the CIE XYZ colorspace corresponds to luminance. Often
+the CIE XYZ colorspace is transformed to the normalized CIE xyY colorspace:</para>
+
+ <para>x = X / (X + Y + Z)</para>
+ <para>y = Y / (X + Y + Z)</para>
+
+ <para>The x and y values are the chromaticity coordinates and can be used to
+define a color without the luminance component Y. It is very confusing to
+have such similar names for these colorspaces. Just be aware that if colors
+are specified with lower case 'x' and 'y', then the CIE xyY colorspace is
+used. Upper case 'X' and 'Y' refer to the CIE XYZ colorspace. Also, y has nothing
+to do with luminance. Together x and y specify a color, and Y the luminance.
+That is really all you need to remember from a practical point of view. At
+the end of this section you will find reading resources that go into much more
+detail if you are interested.
+</para>
+
+ <para>A monitor or TV will reproduce colors by emitting light at three
+different wavelengths, the combination of which will stimulate the color receptors
+in the eye and thus cause the perception of color. Historically these wavelengths
+were defined by the red, green and blue phosphors used in the displays. These
+<emphasis>color primaries</emphasis> are part of what defines a colorspace.</para>
+
+ <para>Different display devices will have different primaries and some
+primaries are more suitable for some display technologies than others. This has
+resulted in a variety of colorspaces that are used for different display
+technologies or uses. To define a colorspace you need to define the three
+color primaries (these are typically defined as x,&nbsp;y chromaticity coordinates
+from the CIE xyY colorspace) but also the white reference: that is the color obtained
+when all three primaries are at maximum power. This determines the relative power
+or energy of the primaries. This is usually chosen to be close to daylight which has
+been defined as the CIE D65 Illuminant.</para>
+
+ <para>To recapitulate: the CIE XYZ colorspace uniquely identifies colors.
+Other colorspaces are defined by three chromaticity coordinates defined in the
+CIE xyY colorspace. Based on those a 3x3 matrix can be constructed that
+transforms CIE XYZ colors to colors in the new colorspace.
+</para>
+
+ <para>Both the CIE XYZ and the RGB colorspace that are derived from the
+specific chromaticity primaries are linear colorspaces. But neither the eye,
+nor display technology is linear. Doubling the values of all components in
+the linear colorspace will not be perceived as twice the intensity of the color.
+So each colorspace also defines a transfer function that takes a linear color
+component value and transforms it to the non-linear component value, which is a
+closer match to the non-linear performance of both the eye and displays. Linear
+component values are denoted RGB, non-linear are denoted as R'G'B'. In general
+colors used in graphics are all R'G'B', except in openGL which uses linear RGB.
+Special care should be taken when dealing with openGL to provide linear RGB colors
+or to use the built-in openGL support to apply the inverse transfer function.</para>
+
+ <para>The final piece that defines a colorspace is a function that
+transforms non-linear R'G'B' to non-linear Y'CbCr. This function is determined
+by the so-called luma coefficients. There may be multiple possible Y'CbCr
+encodings allowed for the same colorspace. Many encodings of color
+prefer to use luma (Y') and chroma (CbCr) instead of R'G'B'. Since the human
+eye is more sensitive to differences in luminance than in color this encoding
+allows one to reduce the amount of color information compared to the luma
+data. Note that the luma (Y') is unrelated to the Y in the CIE XYZ colorspace.
+Also note that Y'CbCr is often called YCbCr or YUV even though these are
+strictly speaking wrong.</para>
+
+ <para>Sometimes people confuse Y'CbCr as being a colorspace. This is not
+correct, it is just an encoding of an R'G'B' color into luma and chroma
+values. The underlying colorspace that is associated with the R'G'B' color
+is also associated with the Y'CbCr color.</para>
+
+ <para>The final step is how the RGB, R'G'B' or Y'CbCr values are
+quantized. The CIE XYZ colorspace where X, Y and Z are in the range
+[0&hellip;1] describes all colors that humans can perceive, but the transform to
+another colorspace will produce colors that are outside the [0&hellip;1] range.
+Once clamped to the [0&hellip;1] range those colors can no longer be reproduced
+in that colorspace. This clamping is what reduces the extent or gamut of the
+colorspace. How the range of [0&hellip;1] is translated to integer values in the
+range of [0&hellip;255] (or higher, depending on the color depth) is called the
+quantization. This is <emphasis>not</emphasis> part of the colorspace
+definition. In practice RGB or R'G'B' values are full range, i.e. they
+use the full [0&hellip;255] range. Y'CbCr values on the other hand are limited
+range with Y' using [16&hellip;235] and Cb and Cr using [16&hellip;240].</para>
+
+ <para>Unfortunately, in some cases limited range RGB is also used
+where the components use the range [16&hellip;235]. And full range Y'CbCr also exists
+using the [0&hellip;255] range.</para>
+
+ <para>In order to correctly interpret a color you need to know the
+quantization range, whether it is R'G'B' or Y'CbCr, the used Y'CbCr encoding
+and the colorspace.
+From that information you can calculate the corresponding CIE XYZ color
+and map that again to whatever colorspace your display device uses.</para>
+
+ <para>The colorspace definition itself consists of the three
+chromaticity primaries, the white reference chromaticity, a transfer
+function and the luma coefficients needed to transform R'G'B' to Y'CbCr. While
+some colorspace standards correctly define all four, quite often the colorspace
+standard only defines some, and you have to rely on other standards for
+the missing pieces. The fact that colorspaces are often a mix of different
+standards also led to very confusing naming conventions where the name of
+a standard was used to name a colorspace when in fact that standard was
+part of various other colorspaces as well.</para>
+
+ <para>If you want to read more about colors and colorspaces, then the
+following resources are useful: <xref linkend="poynton" /> is a good practical
+book for video engineers, <xref linkend="colimg" /> has a much broader scope and
+describes many more aspects of color (physics, chemistry, biology, etc.).
+The <ulink url="http://www.brucelindbloom.com">http://www.brucelindbloom.com</ulink>
+website is an excellent resource, especially with respect to the mathematics behind
+colorspace conversions. The wikipedia <ulink url="http://en.wikipedia.org/wiki/CIE_1931_color_space#CIE_xy_chromaticity_diagram_and_the_CIE_xyY_color_space">CIE 1931 colorspace</ulink> article
+is also very useful.</para>
+ </section>
+
+ <section>
+ <title>Defining Colorspaces in V4L2</title>
+ <para>In V4L2 colorspaces are defined by three values. The first is the colorspace
+identifier (&v4l2-colorspace;) which defines the chromaticities, the transfer
+function, the default Y'CbCr encoding and the default quantization method. The second
+is the Y'CbCr encoding identifier (&v4l2-ycbcr-encoding;) to specify non-standard
+Y'CbCr encodings and the third is the quantization identifier (&v4l2-quantization;)
+to specify non-standard quantization methods. Most of the time only the colorspace
+field of &v4l2-pix-format; or &v4l2-pix-format-mplane; needs to be filled in. Note
+that the default R'G'B' quantization is full range for all colorspaces except for
+BT.2020 which uses limited range R'G'B' quantization.</para>
+
+ <table pgwide="1" frame="none" id="v4l2-colorspace">
+ <title>V4L2 Colorspaces</title>
+ <tgroup cols="2" align="left">
+ &cs-def;
+ <thead>
+ <row>
+ <entry>Identifier</entry>
+ <entry>Details</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_COLORSPACE_SMPTE170M</constant></entry>
+ <entry>See <xref linkend="col-smpte-170m" />.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_COLORSPACE_REC709</constant></entry>
+ <entry>See <xref linkend="col-rec709" />.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_COLORSPACE_SRGB</constant></entry>
+ <entry>See <xref linkend="col-srgb" />.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_COLORSPACE_ADOBERGB</constant></entry>
+ <entry>See <xref linkend="col-adobergb" />.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_COLORSPACE_BT2020</constant></entry>
+ <entry>See <xref linkend="col-bt2020" />.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_COLORSPACE_SMPTE240M</constant></entry>
+ <entry>See <xref linkend="col-smpte-240m" />.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_COLORSPACE_470_SYSTEM_M</constant></entry>
+ <entry>See <xref linkend="col-sysm" />.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_COLORSPACE_470_SYSTEM_BG</constant></entry>
+ <entry>See <xref linkend="col-sysbg" />.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_COLORSPACE_JPEG</constant></entry>
+ <entry>See <xref linkend="col-jpeg" />.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="v4l2-ycbcr-encoding">
+ <title>V4L2 Y'CbCr Encodings</title>
+ <tgroup cols="2" align="left">
+ &cs-def;
+ <thead>
+ <row>
+ <entry>Identifier</entry>
+ <entry>Details</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_YCBCR_ENC_DEFAULT</constant></entry>
+ <entry>Use the default Y'CbCr encoding as defined by the colorspace.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_YCBCR_ENC_601</constant></entry>
+ <entry>Use the BT.601 Y'CbCr encoding.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_YCBCR_ENC_709</constant></entry>
+ <entry>Use the Rec. 709 Y'CbCr encoding.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_YCBCR_ENC_XV601</constant></entry>
+ <entry>Use the extended gamut xvYCC BT.601 encoding.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_YCBCR_ENC_XV709</constant></entry>
+ <entry>Use the extended gamut xvYCC Rec. 709 encoding.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_YCBCR_ENC_SYCC</constant></entry>
+ <entry>Use the extended gamut sYCC encoding.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_YCBCR_ENC_BT2020</constant></entry>
+ <entry>Use the default non-constant luminance BT.2020 Y'CbCr encoding.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_YCBCR_ENC_BT2020_CONST_LUM</constant></entry>
+ <entry>Use the constant luminance BT.2020 Yc'CbcCrc encoding.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="v4l2-quantization">
+ <title>V4L2 Quantization Methods</title>
+ <tgroup cols="2" align="left">
+ &cs-def;
+ <thead>
+ <row>
+ <entry>Identifier</entry>
+ <entry>Details</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_QUANTIZATION_DEFAULT</constant></entry>
+ <entry>Use the default quantization encoding as defined by the colorspace.
+This is always full range for R'G'B' (except for the BT.2020 colorspace) and usually
+limited range for Y'CbCr.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_QUANTIZATION_FULL_RANGE</constant></entry>
+ <entry>Use the full range quantization encoding. I.e. the range [0&hellip;1]
+is mapped to [0&hellip;255] (with possible clipping to [1&hellip;254] to avoid the
+0x00 and 0xff values). Cb and Cr are mapped from [-0.5&hellip;0.5] to [0&hellip;255]
+(with possible clipping to [1&hellip;254] to avoid the 0x00 and 0xff values).</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_QUANTIZATION_LIM_RANGE</constant></entry>
+ <entry>Use the limited range quantization encoding. I.e. the range [0&hellip;1]
+is mapped to [16&hellip;235]. Cb and Cr are mapped from [-0.5&hellip;0.5] to [16&hellip;240].
+</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </section>
+
+ <section>
+ <title>Detailed Colorspace Descriptions</title>
+ <section id="col-smpte-170m">
+ <title>Colorspace SMPTE 170M (<constant>V4L2_COLORSPACE_SMPTE170M</constant>)</title>
+ <para>The <xref linkend="smpte170m" /> standard defines the colorspace used by NTSC and PAL and by SDTV
+in general. The default Y'CbCr encoding is <constant>V4L2_YCBCR_ENC_601</constant>.
+The default Y'CbCr quantization is limited range. The chromaticities of the primary colors and
+the white reference are:</para>
+ <table frame="none">
+ <title>SMPTE 170M Chromaticities</title>
+ <tgroup cols="3" align="left">
+ &cs-str;
+ <thead>
+ <row>
+ <entry>Color</entry>
+ <entry>x</entry>
+ <entry>y</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row>
+ <entry>Red</entry>
+ <entry>0.630</entry>
+ <entry>0.340</entry>
+ </row>
+ <row>
+ <entry>Green</entry>
+ <entry>0.310</entry>
+ <entry>0.595</entry>
+ </row>
+ <row>
+ <entry>Blue</entry>
+ <entry>0.155</entry>
+ <entry>0.070</entry>
+ </row>
+ <row>
+ <entry>White Reference (D65)</entry>
+ <entry>0.3127</entry>
+ <entry>0.3290</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ <para>The red, green and blue chromaticities are also often referred to
+as the SMPTE C set, so this colorspace is sometimes called SMPTE C as well.</para>
+ <variablelist>
+ <varlistentry>
+ <term>The transfer function defined for SMPTE 170M is the same as the
+one defined in Rec. 709.</term>
+ <listitem>
+ <para>L' = -1.099(-L)<superscript>0.45</superscript>&nbsp;+&nbsp;0.099&nbsp;for&nbsp;L&nbsp;&le;&nbsp;-0.018</para>
+ <para>L' = 4.5L&nbsp;for&nbsp;-0.018&nbsp;&lt;&nbsp;L&nbsp;&lt;&nbsp;0.018</para>
+ <para>L' = 1.099L<superscript>0.45</superscript>&nbsp;-&nbsp;0.099&nbsp;for&nbsp;L&nbsp;&ge;&nbsp;0.018</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ <variablelist>
+ <varlistentry>
+ <term>Inverse Transfer function:</term>
+ <listitem>
+ <para>L = -((L'&nbsp;-&nbsp;0.099)&nbsp;/&nbsp;-1.099)<superscript>1/0.45</superscript>&nbsp;for&nbsp;L'&nbsp;&le;&nbsp;-0.081</para>
+ <para>L = L'&nbsp;/&nbsp;4.5&nbsp;for&nbsp;-0.081&nbsp;&lt;&nbsp;L'&nbsp;&lt;&nbsp;0.081</para>
+ <para>L = ((L'&nbsp;+&nbsp;0.099)&nbsp;/&nbsp;1.099)<superscript>1/0.45</superscript>&nbsp;for&nbsp;L'&nbsp;&ge;&nbsp;0.081</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ <variablelist>
+ <varlistentry>
+ <term>The luminance (Y') and color difference (Cb and Cr) are obtained with
+the following <constant>V4L2_YCBCR_ENC_601</constant> encoding:</term>
+ <listitem>
+ <para>Y'&nbsp;=&nbsp;0.299R'&nbsp;+&nbsp;0.587G'&nbsp;+&nbsp;0.114B'</para>
+ <para>Cb&nbsp;=&nbsp;-0.169R'&nbsp;-&nbsp;0.331G'&nbsp;+&nbsp;0.5B'</para>
+ <para>Cr&nbsp;=&nbsp;0.5R'&nbsp;-&nbsp;0.419G'&nbsp;-&nbsp;0.081B'</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ <para>Y' is clamped to the range [0&hellip;1] and Cb and Cr are
+clamped to the range [-0.5&hellip;0.5]. This conversion to Y'CbCr is identical to the one
+defined in the <xref linkend="itu601" /> standard and this colorspace is sometimes called BT.601 as well, even
+though BT.601 does not mention any color primaries.</para>
+ <para>The default quantization is limited range, but full range is possible although
+rarely seen.</para>
+ </section>
+
+ <section id="col-rec709">
+ <title>Colorspace Rec. 709 (<constant>V4L2_COLORSPACE_REC709</constant>)</title>
+ <para>The <xref linkend="itu709" /> standard defines the colorspace used by HDTV in general. The default
+Y'CbCr encoding is <constant>V4L2_YCBCR_ENC_709</constant>. The default Y'CbCr quantization is
+limited range. The chromaticities of the primary colors and the white reference are:</para>
+ <table frame="none">
+ <title>Rec. 709 Chromaticities</title>
+ <tgroup cols="3" align="left">
+ &cs-str;
+ <thead>
+ <row>
+ <entry>Color</entry>
+ <entry>x</entry>
+ <entry>y</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row>
+ <entry>Red</entry>
+ <entry>0.640</entry>
+ <entry>0.330</entry>
+ </row>
+ <row>
+ <entry>Green</entry>
+ <entry>0.300</entry>
+ <entry>0.600</entry>
+ </row>
+ <row>
+ <entry>Blue</entry>
+ <entry>0.150</entry>
+ <entry>0.060</entry>
+ </row>
+ <row>
+ <entry>White Reference (D65)</entry>
+ <entry>0.3127</entry>
+ <entry>0.3290</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ <para>The full name of this standard is Rec. ITU-R BT.709-5.</para>
+ <variablelist>
+ <varlistentry>
+ <term>Transfer function. Normally L is in the range [0&hellip;1], but for the extended
+gamut xvYCC encoding values outside that range are allowed.</term>
+ <listitem>
+ <para>L' = -1.099(-L)<superscript>0.45</superscript>&nbsp;+&nbsp;0.099&nbsp;for&nbsp;L&nbsp;&le;&nbsp;-0.018</para>
+ <para>L' = 4.5L&nbsp;for&nbsp;-0.018&nbsp;&lt;&nbsp;L&nbsp;&lt;&nbsp;0.018</para>
+ <para>L' = 1.099L<superscript>0.45</superscript>&nbsp;-&nbsp;0.099&nbsp;for&nbsp;L&nbsp;&ge;&nbsp;0.018</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ <variablelist>
+ <varlistentry>
+ <term>Inverse Transfer function:</term>
+ <listitem>
+ <para>L = -((L'&nbsp;-&nbsp;0.099)&nbsp;/&nbsp;-1.099)<superscript>1/0.45</superscript>&nbsp;for&nbsp;L'&nbsp;&le;&nbsp;-0.081</para>
+ <para>L = L'&nbsp;/&nbsp;4.5&nbsp;for&nbsp;-0.081&nbsp;&lt;&nbsp;L'&nbsp;&lt;&nbsp;0.081</para>
+ <para>L = ((L'&nbsp;+&nbsp;0.099)&nbsp;/&nbsp;1.099)<superscript>1/0.45</superscript>&nbsp;for&nbsp;L'&nbsp;&ge;&nbsp;0.081</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ <variablelist>
+ <varlistentry>
+ <term>The luminance (Y') and color difference (Cb and Cr) are obtained with the following
+<constant>V4L2_YCBCR_ENC_709</constant> encoding:</term>
+ <listitem>
+ <para>Y'&nbsp;=&nbsp;0.2126R'&nbsp;+&nbsp;0.7152G'&nbsp;+&nbsp;0.0722B'</para>
+ <para>Cb&nbsp;=&nbsp;-0.1146R'&nbsp;-&nbsp;0.3854G'&nbsp;+&nbsp;0.5B'</para>
+ <para>Cr&nbsp;=&nbsp;0.5R'&nbsp;-&nbsp;0.4542G'&nbsp;-&nbsp;0.0458B'</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ <para>Y' is clamped to the range [0&hellip;1] and Cb and Cr are
+clamped to the range [-0.5&hellip;0.5].</para>
+ <para>The default quantization is limited range, but full range is possible although
+rarely seen.</para>
+ <para>The <constant>V4L2_YCBCR_ENC_709</constant> encoding described above is the default
+for this colorspace, but it can be overridden with <constant>V4L2_YCBCR_ENC_601</constant>, in which
+case the BT.601 Y'CbCr encoding is used.</para>
+ <para>Two additional extended gamut Y'CbCr encodings are also possible with this colorspace:</para>
+ <variablelist>
+ <varlistentry>
+ <term>The xvYCC 709 encoding (<constant>V4L2_YCBCR_ENC_XV709</constant>, <xref linkend="xvycc" />)
+is similar to the Rec. 709 encoding, but it allows for R', G' and B' values that are outside the range
+[0&hellip;1]. The resulting Y', Cb and Cr values are scaled and offset:</term>
+ <listitem>
+ <para>Y'&nbsp;=&nbsp;(219&nbsp;/&nbsp;256)&nbsp;*&nbsp;(0.2126R'&nbsp;+&nbsp;0.7152G'&nbsp;+&nbsp;0.0722B')&nbsp;+&nbsp;(16&nbsp;/&nbsp;256)</para>
+ <para>Cb&nbsp;=&nbsp;(224&nbsp;/&nbsp;256)&nbsp;*&nbsp;(-0.1146R'&nbsp;-&nbsp;0.3854G'&nbsp;+&nbsp;0.5B')</para>
+ <para>Cr&nbsp;=&nbsp;(224&nbsp;/&nbsp;256)&nbsp;*&nbsp;(0.5R'&nbsp;-&nbsp;0.4542G'&nbsp;-&nbsp;0.0458B')</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ <variablelist>
+ <varlistentry>
+ <term>The xvYCC 601 encoding (<constant>V4L2_YCBCR_ENC_XV601</constant>, <xref linkend="xvycc" />) is similar
+to the BT.601 encoding, but it allows for R', G' and B' values that are outside the range
+[0&hellip;1]. The resulting Y', Cb and Cr values are scaled and offset:</term>
+ <listitem>
+ <para>Y'&nbsp;=&nbsp;(219&nbsp;/&nbsp;256)&nbsp;*&nbsp;(0.299R'&nbsp;+&nbsp;0.587G'&nbsp;+&nbsp;0.114B')&nbsp;+&nbsp;(16&nbsp;/&nbsp;256)</para>
+ <para>Cb&nbsp;=&nbsp;(224&nbsp;/&nbsp;256)&nbsp;*&nbsp;(-0.169R'&nbsp;-&nbsp;0.331G'&nbsp;+&nbsp;0.5B')</para>
+ <para>Cr&nbsp;=&nbsp;(224&nbsp;/&nbsp;256)&nbsp;*&nbsp;(0.5R'&nbsp;-&nbsp;0.419G'&nbsp;-&nbsp;0.081B')</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ <para>Y' is clamped to the range [0&hellip;1] and Cb and Cr are clamped
+to the range [-0.5&hellip;0.5]. The non-standard xvYCC 709 or xvYCC 601 encodings can be used by
+selecting <constant>V4L2_YCBCR_ENC_XV709</constant> or <constant>V4L2_YCBCR_ENC_XV601</constant>.
+The xvYCC encodings always use full range quantization.</para>
+ </section>
+
+ <section id="col-srgb">
+ <title>Colorspace sRGB (<constant>V4L2_COLORSPACE_SRGB</constant>)</title>
+ <para>The <xref linkend="srgb" /> standard defines the colorspace used by most webcams and computer graphics. The
+default Y'CbCr encoding is <constant>V4L2_YCBCR_ENC_SYCC</constant>. The default Y'CbCr quantization
+is full range. The chromaticities of the primary colors and the white reference are:</para>
+ <table frame="none">
+ <title>sRGB Chromaticities</title>
+ <tgroup cols="3" align="left">
+ &cs-str;
+ <thead>
+ <row>
+ <entry>Color</entry>
+ <entry>x</entry>
+ <entry>y</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row>
+ <entry>Red</entry>
+ <entry>0.640</entry>
+ <entry>0.330</entry>
+ </row>
+ <row>
+ <entry>Green</entry>
+ <entry>0.300</entry>
+ <entry>0.600</entry>
+ </row>
+ <row>
+ <entry>Blue</entry>
+ <entry>0.150</entry>
+ <entry>0.060</entry>
+ </row>
+ <row>
+ <entry>White Reference (D65)</entry>
+ <entry>0.3127</entry>
+ <entry>0.3290</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ <para>These chromaticities are identical to the Rec. 709 colorspace.</para>
+ <variablelist>
+ <varlistentry>
+ <term>Transfer function. Note that negative values for L are only used by the Y'CbCr conversion.</term>
+ <listitem>
+ <para>L' = -1.055(-L)<superscript>1/2.4</superscript>&nbsp;+&nbsp;0.055&nbsp;for&nbsp;L&nbsp;&lt;&nbsp;-0.0031308</para>
+ <para>L' = 12.92L&nbsp;for&nbsp;-0.0031308&nbsp;&le;&nbsp;L&nbsp;&le;&nbsp;0.0031308</para>
+ <para>L' = 1.055L<superscript>1/2.4</superscript>&nbsp;-&nbsp;0.055&nbsp;for&nbsp;0.0031308&nbsp;&lt;&nbsp;L&nbsp;&le;&nbsp;1</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>Inverse Transfer function:</term>
+ <listitem>
+ <para>L = -((-L'&nbsp;+&nbsp;0.055)&nbsp;/&nbsp;1.055)<superscript>2.4</superscript>&nbsp;for&nbsp;L'&nbsp;&lt;&nbsp;-0.04045</para>
+ <para>L = L'&nbsp;/&nbsp;12.92&nbsp;for&nbsp;-0.04045&nbsp;&le;&nbsp;L'&nbsp;&le;&nbsp;0.04045</para>
+ <para>L = ((L'&nbsp;+&nbsp;0.055)&nbsp;/&nbsp;1.055)<superscript>2.4</superscript>&nbsp;for&nbsp;L'&nbsp;&gt;&nbsp;0.04045</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ <variablelist>
+ <varlistentry>
+ <term>The luminance (Y') and color difference (Cb and Cr) are obtained with the following
+<constant>V4L2_YCBCR_ENC_SYCC</constant> encoding as defined by <xref linkend="sycc" />:</term>
+ <listitem>
+ <para>Y'&nbsp;=&nbsp;0.2990R'&nbsp;+&nbsp;0.5870G'&nbsp;+&nbsp;0.1140B'</para>
+ <para>Cb&nbsp;=&nbsp;-0.1687R'&nbsp;-&nbsp;0.3313G'&nbsp;+&nbsp;0.5B'</para>
+ <para>Cr&nbsp;=&nbsp;0.5R'&nbsp;-&nbsp;0.4187G'&nbsp;-&nbsp;0.0813B'</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ <para>Y' is clamped to the range [0&hellip;1] and Cb and Cr are clamped
+to the range [-0.5&hellip;0.5]. The <constant>V4L2_YCBCR_ENC_SYCC</constant> quantization is always
+full range. Although this Y'CbCr encoding looks very similar to the <constant>V4L2_YCBCR_ENC_XV601</constant>
+encoding, it is not. The <constant>V4L2_YCBCR_ENC_XV601</constant> scales and offsets the Y'CbCr
+values before quantization, but this encoding does not do that.</para>
+ </section>
+
+ <section id="col-adobergb">
+ <title>Colorspace Adobe RGB (<constant>V4L2_COLORSPACE_ADOBERGB</constant>)</title>
+ <para>The <xref linkend="adobergb" /> standard defines the colorspace used by computer graphics
+that use the AdobeRGB colorspace. This is also known as the <xref linkend="oprgb" /> standard.
+The default Y'CbCr encoding is <constant>V4L2_YCBCR_ENC_601</constant>. The default Y'CbCr
+quantization is limited range. The chromaticities of the primary colors and the white reference
+are:</para>
+ <table frame="none">
+ <title>Adobe RGB Chromaticities</title>
+ <tgroup cols="3" align="left">
+ &cs-str;
+ <thead>
+ <row>
+ <entry>Color</entry>
+ <entry>x</entry>
+ <entry>y</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row>
+ <entry>Red</entry>
+ <entry>0.6400</entry>
+ <entry>0.3300</entry>
+ </row>
+ <row>
+ <entry>Green</entry>
+ <entry>0.2100</entry>
+ <entry>0.7100</entry>
+ </row>
+ <row>
+ <entry>Blue</entry>
+ <entry>0.1500</entry>
+ <entry>0.0600</entry>
+ </row>
+ <row>
+ <entry>White Reference (D65)</entry>
+ <entry>0.3127</entry>
+ <entry>0.3290</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ <variablelist>
+ <varlistentry>
+ <term>Transfer function:</term>
+ <listitem>
+ <para>L' = L<superscript>1/2.19921875</superscript></para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>Inverse Transfer function:</term>
+ <listitem>
+ <para>L = L'<superscript>2.19921875</superscript></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ <variablelist>
+ <varlistentry>
+ <term>The luminance (Y') and color difference (Cb and Cr) are obtained with the
+following <constant>V4L2_YCBCR_ENC_601</constant> encoding:</term>
+ <listitem>
+ <para>Y'&nbsp;=&nbsp;0.299R'&nbsp;+&nbsp;0.587G'&nbsp;+&nbsp;0.114B'</para>
+ <para>Cb&nbsp;=&nbsp;-0.169R'&nbsp;-&nbsp;0.331G'&nbsp;+&nbsp;0.5B'</para>
+ <para>Cr&nbsp;=&nbsp;0.5R'&nbsp;-&nbsp;0.419G'&nbsp;-&nbsp;0.081B'</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ <para>Y' is clamped to the range [0&hellip;1] and Cb and Cr are
+clamped to the range [-0.5&hellip;0.5]. This transform is identical to one defined in
+SMPTE 170M/BT.601. The Y'CbCr quantization is limited range.</para>
+ </section>
+
+ <section id="col-bt2020">
+ <title>Colorspace BT.2020 (<constant>V4L2_COLORSPACE_BT2020</constant>)</title>
+ <para>The <xref linkend="itu2020" /> standard defines the colorspace used by Ultra-high definition
+television (UHDTV). The default Y'CbCr encoding is <constant>V4L2_YCBCR_ENC_BT2020</constant>.
+The default R'G'B' quantization is limited range (!), and so is the default Y'CbCr quantization.
+The chromaticities of the primary colors and the white reference are:</para>
+ <table frame="none">
+ <title>BT.2020 Chromaticities</title>
+ <tgroup cols="3" align="left">
+ &cs-str;
+ <thead>
+ <row>
+ <entry>Color</entry>
+ <entry>x</entry>
+ <entry>y</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row>
+ <entry>Red</entry>
+ <entry>0.708</entry>
+ <entry>0.292</entry>
+ </row>
+ <row>
+ <entry>Green</entry>
+ <entry>0.170</entry>
+ <entry>0.797</entry>
+ </row>
+ <row>
+ <entry>Blue</entry>
+ <entry>0.131</entry>
+ <entry>0.046</entry>
+ </row>
+ <row>
+ <entry>White Reference (D65)</entry>
+ <entry>0.3127</entry>
+ <entry>0.3290</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ <variablelist>
+ <varlistentry>
+ <term>Transfer function (same as Rec. 709):</term>
+ <listitem>
+ <para>L' = 4.5L&nbsp;for&nbsp;0&nbsp;&le;&nbsp;L&nbsp;&lt;&nbsp;0.018</para>
+ <para>L' = 1.099L<superscript>0.45</superscript>&nbsp;-&nbsp;0.099&nbsp;for&nbsp;0.018&nbsp;&le;&nbsp;L&nbsp;&le;&nbsp;1</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>Inverse Transfer function:</term>
+ <listitem>
+ <para>L = L'&nbsp;/&nbsp;4.5&nbsp;for&nbsp;L'&nbsp;&lt;&nbsp;0.081</para>
+ <para>L = ((L'&nbsp;+&nbsp;0.099)&nbsp;/&nbsp;1.099)<superscript>1/0.45</superscript>&nbsp;for&nbsp;L'&nbsp;&ge;&nbsp;0.081</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ <variablelist>
+ <varlistentry>
+ <term>The luminance (Y') and color difference (Cb and Cr) are obtained with the
+following <constant>V4L2_YCBCR_ENC_BT2020</constant> encoding:</term>
+ <listitem>
+ <para>Y'&nbsp;=&nbsp;0.2627R'&nbsp;+&nbsp;0.6780G'&nbsp;+&nbsp;0.0593B'</para>
+ <para>Cb&nbsp;=&nbsp;-0.1396R'&nbsp;-&nbsp;0.3604G'&nbsp;+&nbsp;0.5B'</para>
+ <para>Cr&nbsp;=&nbsp;0.5R'&nbsp;-&nbsp;0.4598G'&nbsp;-&nbsp;0.0402B'</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ <para>Y' is clamped to the range [0&hellip;1] and Cb and Cr are
+clamped to the range [-0.5&hellip;0.5]. The Y'CbCr quantization is limited range.</para>
+ <para>There is also an alternate constant luminance R'G'B' to Yc'CbcCrc
+(<constant>V4L2_YCBCR_ENC_BT2020_CONST_LUM</constant>) encoding:</para>
+ <variablelist>
+ <varlistentry>
+ <term>Luma:</term>
+ <listitem>
+ <para>Yc'&nbsp;=&nbsp;(0.2627R&nbsp;+&nbsp;0.6780G&nbsp;+&nbsp;0.0593B)'</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ <variablelist>
+ <varlistentry>
+ <term>B'&nbsp;-&nbsp;Yc'&nbsp;&le;&nbsp;0:</term>
+ <listitem>
+ <para>Cbc&nbsp;=&nbsp;(B'&nbsp;-&nbsp;Yc')&nbsp;/&nbsp;1.9404</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ <variablelist>
+ <varlistentry>
+ <term>B'&nbsp;-&nbsp;Yc'&nbsp;&gt;&nbsp;0:</term>
+ <listitem>
+ <para>Cbc&nbsp;=&nbsp;(B'&nbsp;-&nbsp;Yc')&nbsp;/&nbsp;1.5816</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ <variablelist>
+ <varlistentry>
+ <term>R'&nbsp;-&nbsp;Yc'&nbsp;&le;&nbsp;0:</term>
+ <listitem>
+ <para>Crc&nbsp;=&nbsp;(R'&nbsp;-&nbsp;Y')&nbsp;/&nbsp;1.7184</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ <variablelist>
+ <varlistentry>
+ <term>R'&nbsp;-&nbsp;Yc'&nbsp;&gt;&nbsp;0:</term>
+ <listitem>
+ <para>Crc&nbsp;=&nbsp;(R'&nbsp;-&nbsp;Y')&nbsp;/&nbsp;0.9936</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ <para>Yc' is clamped to the range [0&hellip;1] and Cbc and Crc are
+clamped to the range [-0.5&hellip;0.5]. The Yc'CbcCrc quantization is limited range.</para>
+ </section>
+
+ <section id="col-smpte-240m">
+ <title>Colorspace SMPTE 240M (<constant>V4L2_COLORSPACE_SMPTE240M</constant>)</title>
+ <para>The <xref linkend="smpte240m" /> standard was an interim standard used during the early days of HDTV (1988-1998).
+It has been superseded by Rec. 709. The default Y'CbCr encoding is <constant>V4L2_YCBCR_ENC_SMPTE240M</constant>.
+The default Y'CbCr quantization is limited range. The chromaticities of the primary colors and the
+white reference are:</para>
+ <table frame="none">
+ <title>SMPTE 240M Chromaticities</title>
+ <tgroup cols="3" align="left">
+ &cs-str;
+ <thead>
+ <row>
+ <entry>Color</entry>
+ <entry>x</entry>
+ <entry>y</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row>
+ <entry>Red</entry>
+ <entry>0.630</entry>
+ <entry>0.340</entry>
+ </row>
+ <row>
+ <entry>Green</entry>
+ <entry>0.310</entry>
+ <entry>0.595</entry>
+ </row>
+ <row>
+ <entry>Blue</entry>
+ <entry>0.155</entry>
+ <entry>0.070</entry>
+ </row>
+ <row>
+ <entry>White Reference (D65)</entry>
+ <entry>0.3127</entry>
+ <entry>0.3290</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ <para>These chromaticities are identical to the SMPTE 170M colorspace.</para>
+ <variablelist>
+ <varlistentry>
+ <term>Transfer function:</term>
+ <listitem>
+ <para>L' = 4L&nbsp;for&nbsp;0&nbsp;&le;&nbsp;L&nbsp;&lt;&nbsp;0.0228</para>
+ <para>L' = 1.1115L<superscript>0.45</superscript>&nbsp;-&nbsp;0.1115&nbsp;for&nbsp;0.0228&nbsp;&le;&nbsp;L&nbsp;&le;&nbsp;1</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>Inverse Transfer function:</term>
+ <listitem>
+ <para>L = L'&nbsp;/&nbsp;4&nbsp;for&nbsp;0&nbsp;&le;&nbsp;L'&nbsp;&lt;&nbsp;0.0913</para>
+ <para>L = ((L'&nbsp;+&nbsp;0.1115)&nbsp;/&nbsp;1.1115)<superscript>1/0.45</superscript>&nbsp;for&nbsp;L'&nbsp;&ge;&nbsp;0.0913</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ <variablelist>
+ <varlistentry>
+ <term>The luminance (Y') and color difference (Cb and Cr) are obtained with the
+following <constant>V4L2_YCBCR_ENC_SMPTE240M</constant> encoding:</term>
+ <listitem>
+ <para>Y'&nbsp;=&nbsp;0.2122R'&nbsp;+&nbsp;0.7013G'&nbsp;+&nbsp;0.0865B'</para>
+ <para>Cb&nbsp;=&nbsp;-0.1161R'&nbsp;-&nbsp;0.3839G'&nbsp;+&nbsp;0.5B'</para>
+ <para>Cr&nbsp;=&nbsp;0.5R'&nbsp;-&nbsp;0.4451G'&nbsp;-&nbsp;0.0549B'</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ <para>Yc' is clamped to the range [0&hellip;1] and Cbc and Crc are
+clamped to the range [-0.5&hellip;0.5]. The Y'CbCr quantization is limited range.</para>
+ </section>
+
+ <section id="col-sysm">
+ <title>Colorspace NTSC 1953 (<constant>V4L2_COLORSPACE_470_SYSTEM_M</constant>)</title>
+ <para>This standard defines the colorspace used by NTSC in 1953. In practice this
+colorspace is obsolete and SMPTE 170M should be used instead. The default Y'CbCr encoding
+is <constant>V4L2_YCBCR_ENC_601</constant>. The default Y'CbCr quantization is limited range.
+The chromaticities of the primary colors and the white reference are:</para>
+ <table frame="none">
+ <title>NTSC 1953 Chromaticities</title>
+ <tgroup cols="3" align="left">
+ &cs-str;
+ <thead>
+ <row>
+ <entry>Color</entry>
+ <entry>x</entry>
+ <entry>y</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row>
+ <entry>Red</entry>
+ <entry>0.67</entry>
+ <entry>0.33</entry>
+ </row>
+ <row>
+ <entry>Green</entry>
+ <entry>0.21</entry>
+ <entry>0.71</entry>
+ </row>
+ <row>
+ <entry>Blue</entry>
+ <entry>0.14</entry>
+ <entry>0.08</entry>
+ </row>
+ <row>
+ <entry>White Reference (C)</entry>
+ <entry>0.310</entry>
+ <entry>0.316</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ <para>Note that this colorspace uses Illuminant C instead of D65 as the
+white reference. To correctly convert an image in this colorspace to another
+that uses D65 you need to apply a chromatic adaptation algorithm such as the
+Bradford method.</para>
+ <variablelist>
+ <varlistentry>
+ <term>The transfer function was never properly defined for NTSC 1953. The
+Rec. 709 transfer function is recommended in the literature:</term>
+ <listitem>
+ <para>L' = 4.5L&nbsp;for&nbsp;0&nbsp;&le;&nbsp;L&nbsp;&lt;&nbsp;0.018</para>
+ <para>L' = 1.099L<superscript>0.45</superscript>&nbsp;-&nbsp;0.099&nbsp;for&nbsp;0.018&nbsp;&le;&nbsp;L&nbsp;&le;&nbsp;1</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>Inverse Transfer function:</term>
+ <listitem>
+ <para>L = L'&nbsp;/&nbsp;4.5&nbsp;for&nbsp;L'&nbsp;&lt;&nbsp;0.081</para>
+ <para>L = ((L'&nbsp;+&nbsp;0.099)&nbsp;/&nbsp;1.099)<superscript>1/0.45</superscript>&nbsp;for&nbsp;L'&nbsp;&ge;&nbsp;0.081</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ <variablelist>
+ <varlistentry>
+ <term>The luminance (Y') and color difference (Cb and Cr) are obtained with the
+following <constant>V4L2_YCBCR_ENC_601</constant> encoding:</term>
+ <listitem>
+ <para>Y'&nbsp;=&nbsp;0.299R'&nbsp;+&nbsp;0.587G'&nbsp;+&nbsp;0.114B'</para>
+ <para>Cb&nbsp;=&nbsp;-0.169R'&nbsp;-&nbsp;0.331G'&nbsp;+&nbsp;0.5B'</para>
+ <para>Cr&nbsp;=&nbsp;0.5R'&nbsp;-&nbsp;0.419G'&nbsp;-&nbsp;0.081B'</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ <para>Y' is clamped to the range [0&hellip;1] and Cb and Cr are
+clamped to the range [-0.5&hellip;0.5]. The Y'CbCr quantization is limited range.
+This transform is identical to one defined in SMPTE 170M/BT.601.</para>
+ </section>
+
+ <section id="col-sysbg">
+ <title>Colorspace EBU Tech. 3213 (<constant>V4L2_COLORSPACE_470_SYSTEM_BG</constant>)</title>
+ <para>The <xref linkend="tech3213" /> standard defines the colorspace used by PAL/SECAM in 1975. In practice this
+colorspace is obsolete and SMPTE 170M should be used instead. The default Y'CbCr encoding
+is <constant>V4L2_YCBCR_ENC_601</constant>. The default Y'CbCr quantization is limited range.
+The chromaticities of the primary colors and the white reference are:</para>
+ <table frame="none">
+ <title>EBU Tech. 3213 Chromaticities</title>
+ <tgroup cols="3" align="left">
+ &cs-str;
+ <thead>
+ <row>
+ <entry>Color</entry>
+ <entry>x</entry>
+ <entry>y</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row>
+ <entry>Red</entry>
+ <entry>0.64</entry>
+ <entry>0.33</entry>
+ </row>
+ <row>
+ <entry>Green</entry>
+ <entry>0.29</entry>
+ <entry>0.60</entry>
+ </row>
+ <row>
+ <entry>Blue</entry>
+ <entry>0.15</entry>
+ <entry>0.06</entry>
+ </row>
+ <row>
+ <entry>White Reference (D65)</entry>
+ <entry>0.3127</entry>
+ <entry>0.3290</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ <variablelist>
+ <varlistentry>
+ <term>The transfer function was never properly defined for this colorspace.
+The Rec. 709 transfer function is recommended in the literature:</term>
+ <listitem>
+ <para>L' = 4.5L&nbsp;for&nbsp;0&nbsp;&le;&nbsp;L&nbsp;&lt;&nbsp;0.018</para>
+ <para>L' = 1.099L<superscript>0.45</superscript>&nbsp;-&nbsp;0.099&nbsp;for&nbsp;0.018&nbsp;&le;&nbsp;L&nbsp;&le;&nbsp;1</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>Inverse Transfer function:</term>
+ <listitem>
+ <para>L = L'&nbsp;/&nbsp;4.5&nbsp;for&nbsp;L'&nbsp;&lt;&nbsp;0.081</para>
+ <para>L = ((L'&nbsp;+&nbsp;0.099)&nbsp;/&nbsp;1.099)<superscript>1/0.45</superscript>&nbsp;for&nbsp;L'&nbsp;&ge;&nbsp;0.081</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ <variablelist>
+ <varlistentry>
+ <term>The luminance (Y') and color difference (Cb and Cr) are obtained with the
+following <constant>V4L2_YCBCR_ENC_601</constant> encoding:</term>
+ <listitem>
+ <para>Y'&nbsp;=&nbsp;0.299R'&nbsp;+&nbsp;0.587G'&nbsp;+&nbsp;0.114B'</para>
+ <para>Cb&nbsp;=&nbsp;-0.169R'&nbsp;-&nbsp;0.331G'&nbsp;+&nbsp;0.5B'</para>
+ <para>Cr&nbsp;=&nbsp;0.5R'&nbsp;-&nbsp;0.419G'&nbsp;-&nbsp;0.081B'</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ <para>Y' is clamped to the range [0&hellip;1] and Cb and Cr are
+clamped to the range [-0.5&hellip;0.5]. The Y'CbCr quantization is limited range.
+This transform is identical to one defined in SMPTE 170M/BT.601.</para>
+ </section>
+
+ <section id="col-jpeg">
+ <title>Colorspace JPEG (<constant>V4L2_COLORSPACE_JPEG</constant>)</title>
+ <para>This colorspace defines the colorspace used by most (Motion-)JPEG formats. The chromaticities
+of the primary colors and the white reference are identical to sRGB. The Y'CbCr encoding is
+<constant>V4L2_YCBCR_ENC_601</constant> with full range quantization where
+Y' is scaled to [0&hellip;255] and Cb/Cr are scaled to [-128&hellip;128] and
+then clipped to [-128&hellip;127].</para>
+ <para>Note that the JPEG standard does not actually store colorspace information.
+So if something other than sRGB is used, then the driver will have to set that information
+explicitly. Effectively <constant>V4L2_COLORSPACE_JPEG</constant> can be considered to be
+an abbreviation for <constant>V4L2_COLORSPACE_SRGB</constant>, <constant>V4L2_YCBCR_ENC_601</constant>
+and <constant>V4L2_QUANTIZATION_FULL_RANGE</constant>.</para>
+ </section>
+
+ </section>
+
+ <section id="pixfmt-indexed">
+ <title>Indexed Format</title>
+
+ <para>In this format each pixel is represented by an 8 bit index
+into a 256 entry ARGB palette. It is intended for <link
+linkend="osd">Video Output Overlays</link> only. There are no ioctls to
+access the palette, this must be done with ioctls of the Linux framebuffer API.</para>
+
+ <table pgwide="0" frame="none">
+ <title>Indexed Image Format</title>
+ <tgroup cols="37" align="center">
+ <colspec colname="id" align="left" />
+ <colspec colname="fourcc" />
+ <colspec colname="bit" />
+
+ <colspec colnum="4" colname="b07" align="center" />
+ <colspec colnum="5" colname="b06" align="center" />
+ <colspec colnum="6" colname="b05" align="center" />
+ <colspec colnum="7" colname="b04" align="center" />
+ <colspec colnum="8" colname="b03" align="center" />
+ <colspec colnum="9" colname="b02" align="center" />
+ <colspec colnum="10" colname="b01" align="center" />
+ <colspec colnum="11" colname="b00" align="center" />
+
+ <spanspec namest="b07" nameend="b00" spanname="b0" />
+ <spanspec namest="b17" nameend="b10" spanname="b1" />
+ <spanspec namest="b27" nameend="b20" spanname="b2" />
+ <spanspec namest="b37" nameend="b30" spanname="b3" />
+ <thead>
+ <row>
+ <entry>Identifier</entry>
+ <entry>Code</entry>
+ <entry>&nbsp;</entry>
+ <entry spanname="b0">Byte&nbsp;0</entry>
+ </row>
+ <row>
+ <entry>&nbsp;</entry>
+ <entry>&nbsp;</entry>
+ <entry>Bit</entry>
+ <entry>7</entry>
+ <entry>6</entry>
+ <entry>5</entry>
+ <entry>4</entry>
+ <entry>3</entry>
+ <entry>2</entry>
+ <entry>1</entry>
+ <entry>0</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row id="V4L2-PIX-FMT-PAL8">
+ <entry><constant>V4L2_PIX_FMT_PAL8</constant></entry>
+ <entry>'PAL8'</entry>
+ <entry></entry>
+ <entry>i<subscript>7</subscript></entry>
+ <entry>i<subscript>6</subscript></entry>
+ <entry>i<subscript>5</subscript></entry>
+ <entry>i<subscript>4</subscript></entry>
+ <entry>i<subscript>3</subscript></entry>
+ <entry>i<subscript>2</subscript></entry>
+ <entry>i<subscript>1</subscript></entry>
+ <entry>i<subscript>0</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </section>
+
+ <section id="pixfmt-rgb">
+ <title>RGB Formats</title>
+
+ &sub-packed-rgb;
+ &sub-sbggr8;
+ &sub-sgbrg8;
+ &sub-sgrbg8;
+ &sub-srggb8;
+ &sub-sbggr16;
+ &sub-srggb10;
+ &sub-srggb10p;
+ &sub-srggb10alaw8;
+ &sub-srggb10dpcm8;
+ &sub-srggb12;
+ </section>
+
+ <section id="yuv-formats">
+ <title>YUV Formats</title>
+
+ <para>YUV is the format native to TV broadcast and composite video
+signals. It separates the brightness information (Y) from the color
+information (U and V or Cb and Cr). The color information consists of
+red and blue <emphasis>color difference</emphasis> signals, this way
+the green component can be reconstructed by subtracting from the
+brightness component. See <xref linkend="colorspaces" /> for conversion
+examples. YUV was chosen because early television would only transmit
+brightness information. To add color in a way compatible with existing
+receivers a new signal carrier was added to transmit the color
+difference signals. Secondary in the YUV format the U and V components
+usually have lower resolution than the Y component. This is an analog
+video compression technique taking advantage of a property of the
+human visual system, being more sensitive to brightness
+information.</para>
+
+ &sub-packed-yuv;
+ &sub-grey;
+ &sub-y10;
+ &sub-y12;
+ &sub-y10b;
+ &sub-y16;
+ &sub-uv8;
+ &sub-yuyv;
+ &sub-uyvy;
+ &sub-yvyu;
+ &sub-vyuy;
+ &sub-y41p;
+ &sub-yuv420;
+ &sub-yuv420m;
+ &sub-yvu420m;
+ &sub-yuv410;
+ &sub-yuv422p;
+ &sub-yuv411p;
+ &sub-nv12;
+ &sub-nv12m;
+ &sub-nv12mt;
+ &sub-nv16;
+ &sub-nv16m;
+ &sub-nv24;
+ &sub-m420;
+ </section>
+
+ <section>
+ <title>Compressed Formats</title>
+
+ <table pgwide="1" frame="none" id="compressed-formats">
+ <title>Compressed Image Formats</title>
+ <tgroup cols="3" align="left">
+ &cs-def;
+ <thead>
+ <row>
+ <entry>Identifier</entry>
+ <entry>Code</entry>
+ <entry>Details</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row id="V4L2-PIX-FMT-JPEG">
+ <entry><constant>V4L2_PIX_FMT_JPEG</constant></entry>
+ <entry>'JPEG'</entry>
+ <entry>TBD. See also &VIDIOC-G-JPEGCOMP;,
+ &VIDIOC-S-JPEGCOMP;.</entry>
+ </row>
+ <row id="V4L2-PIX-FMT-MPEG">
+ <entry><constant>V4L2_PIX_FMT_MPEG</constant></entry>
+ <entry>'MPEG'</entry>
+ <entry>MPEG multiplexed stream. The actual format is determined by
+extended control <constant>V4L2_CID_MPEG_STREAM_TYPE</constant>, see
+<xref linkend="mpeg-control-id" />.</entry>
+ </row>
+ <row id="V4L2-PIX-FMT-H264">
+ <entry><constant>V4L2_PIX_FMT_H264</constant></entry>
+ <entry>'H264'</entry>
+ <entry>H264 video elementary stream with start codes.</entry>
+ </row>
+ <row id="V4L2-PIX-FMT-H264-NO-SC">
+ <entry><constant>V4L2_PIX_FMT_H264_NO_SC</constant></entry>
+ <entry>'AVC1'</entry>
+ <entry>H264 video elementary stream without start codes.</entry>
+ </row>
+ <row id="V4L2-PIX-FMT-H264-MVC">
+ <entry><constant>V4L2_PIX_FMT_H264_MVC</constant></entry>
+ <entry>'M264'</entry>
+ <entry>H264 MVC video elementary stream.</entry>
+ </row>
+ <row id="V4L2-PIX-FMT-H263">
+ <entry><constant>V4L2_PIX_FMT_H263</constant></entry>
+ <entry>'H263'</entry>
+ <entry>H263 video elementary stream.</entry>
+ </row>
+ <row id="V4L2-PIX-FMT-MPEG1">
+ <entry><constant>V4L2_PIX_FMT_MPEG1</constant></entry>
+ <entry>'MPG1'</entry>
+ <entry>MPEG1 video elementary stream.</entry>
+ </row>
+ <row id="V4L2-PIX-FMT-MPEG2">
+ <entry><constant>V4L2_PIX_FMT_MPEG2</constant></entry>
+ <entry>'MPG2'</entry>
+ <entry>MPEG2 video elementary stream.</entry>
+ </row>
+ <row id="V4L2-PIX-FMT-MPEG4">
+ <entry><constant>V4L2_PIX_FMT_MPEG4</constant></entry>
+ <entry>'MPG4'</entry>
+ <entry>MPEG4 video elementary stream.</entry>
+ </row>
+ <row id="V4L2-PIX-FMT-XVID">
+ <entry><constant>V4L2_PIX_FMT_XVID</constant></entry>
+ <entry>'XVID'</entry>
+ <entry>Xvid video elementary stream.</entry>
+ </row>
+ <row id="V4L2-PIX-FMT-VC1-ANNEX-G">
+ <entry><constant>V4L2_PIX_FMT_VC1_ANNEX_G</constant></entry>
+ <entry>'VC1G'</entry>
+ <entry>VC1, SMPTE 421M Annex G compliant stream.</entry>
+ </row>
+ <row id="V4L2-PIX-FMT-VC1-ANNEX-L">
+ <entry><constant>V4L2_PIX_FMT_VC1_ANNEX_L</constant></entry>
+ <entry>'VC1L'</entry>
+ <entry>VC1, SMPTE 421M Annex L compliant stream.</entry>
+ </row>
+ <row id="V4L2-PIX-FMT-VP8">
+ <entry><constant>V4L2_PIX_FMT_VP8</constant></entry>
+ <entry>'VP80'</entry>
+ <entry>VP8 video elementary stream.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </section>
+
+ <section id="sdr-formats">
+ <title>SDR Formats</title>
+
+ <para>These formats are used for <link linkend="sdr">SDR Capture</link>
+interface only.</para>
+
+ &sub-sdr-cu08;
+ &sub-sdr-cu16le;
+ &sub-sdr-cs08;
+ &sub-sdr-cs14le;
+ &sub-sdr-ru12le;
+
+ </section>
+
+ <section id="pixfmt-reserved">
+ <title>Reserved Format Identifiers</title>
+
+ <para>These formats are not defined by this specification, they
+are just listed for reference and to avoid naming conflicts. If you
+want to register your own format, send an e-mail to the linux-media mailing
+list &v4l-ml; for inclusion in the <filename>videodev2.h</filename>
+file. If you want to share your format with other developers add a
+link to your documentation and send a copy to the linux-media mailing list
+for inclusion in this section. If you think your format should be listed
+in a standard format section please make a proposal on the linux-media mailing
+list.</para>
+
+ <table pgwide="1" frame="none" id="reserved-formats">
+ <title>Reserved Image Formats</title>
+ <tgroup cols="3" align="left">
+ &cs-def;
+ <thead>
+ <row>
+ <entry>Identifier</entry>
+ <entry>Code</entry>
+ <entry>Details</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row id="V4L2-PIX-FMT-DV">
+ <entry><constant>V4L2_PIX_FMT_DV</constant></entry>
+ <entry>'dvsd'</entry>
+ <entry>unknown</entry>
+ </row>
+ <row id="V4L2-PIX-FMT-ET61X251">
+ <entry><constant>V4L2_PIX_FMT_ET61X251</constant></entry>
+ <entry>'E625'</entry>
+ <entry>Compressed format of the ET61X251 driver.</entry>
+ </row>
+ <row id="V4L2-PIX-FMT-HI240">
+ <entry><constant>V4L2_PIX_FMT_HI240</constant></entry>
+ <entry>'HI24'</entry>
+ <entry><para>8 bit RGB format used by the BTTV driver.</para></entry>
+ </row>
+ <row id="V4L2-PIX-FMT-HM12">
+ <entry><constant>V4L2_PIX_FMT_HM12</constant></entry>
+ <entry>'HM12'</entry>
+ <entry><para>YUV 4:2:0 format used by the
+IVTV driver, <ulink url="http://www.ivtvdriver.org/">
+http://www.ivtvdriver.org/</ulink></para><para>The format is documented in the
+kernel sources in the file <filename>Documentation/video4linux/cx2341x/README.hm12</filename>
+</para></entry>
+ </row>
+ <row id="V4L2-PIX-FMT-CPIA1">
+ <entry><constant>V4L2_PIX_FMT_CPIA1</constant></entry>
+ <entry>'CPIA'</entry>
+ <entry>YUV format used by the gspca cpia1 driver.</entry>
+ </row>
+ <row id="V4L2-PIX-FMT-JPGL">
+ <entry><constant>V4L2_PIX_FMT_JPGL</constant></entry>
+ <entry>'JPGL'</entry>
+ <entry>JPEG-Light format (Pegasus Lossless JPEG)
+ used in Divio webcams NW 80x.</entry>
+ </row>
+ <row id="V4L2-PIX-FMT-SPCA501">
+ <entry><constant>V4L2_PIX_FMT_SPCA501</constant></entry>
+ <entry>'S501'</entry>
+ <entry>YUYV per line used by the gspca driver.</entry>
+ </row>
+ <row id="V4L2-PIX-FMT-SPCA505">
+ <entry><constant>V4L2_PIX_FMT_SPCA505</constant></entry>
+ <entry>'S505'</entry>
+ <entry>YYUV per line used by the gspca driver.</entry>
+ </row>
+ <row id="V4L2-PIX-FMT-SPCA508">
+ <entry><constant>V4L2_PIX_FMT_SPCA508</constant></entry>
+ <entry>'S508'</entry>
+ <entry>YUVY per line used by the gspca driver.</entry>
+ </row>
+ <row id="V4L2-PIX-FMT-SPCA561">
+ <entry><constant>V4L2_PIX_FMT_SPCA561</constant></entry>
+ <entry>'S561'</entry>
+ <entry>Compressed GBRG Bayer format used by the gspca driver.</entry>
+ </row>
+ <row id="V4L2-PIX-FMT-PAC207">
+ <entry><constant>V4L2_PIX_FMT_PAC207</constant></entry>
+ <entry>'P207'</entry>
+ <entry>Compressed BGGR Bayer format used by the gspca driver.</entry>
+ </row>
+ <row id="V4L2-PIX-FMT-MR97310A">
+ <entry><constant>V4L2_PIX_FMT_MR97310A</constant></entry>
+ <entry>'M310'</entry>
+ <entry>Compressed BGGR Bayer format used by the gspca driver.</entry>
+ </row>
+ <row id="V4L2-PIX-FMT-JL2005BCD">
+ <entry><constant>V4L2_PIX_FMT_JL2005BCD</constant></entry>
+ <entry>'JL20'</entry>
+ <entry>JPEG compressed RGGB Bayer format used by the gspca driver.</entry>
+ </row>
+ <row id="V4L2-PIX-FMT-OV511">
+ <entry><constant>V4L2_PIX_FMT_OV511</constant></entry>
+ <entry>'O511'</entry>
+ <entry>OV511 JPEG format used by the gspca driver.</entry>
+ </row>
+ <row id="V4L2-PIX-FMT-OV518">
+ <entry><constant>V4L2_PIX_FMT_OV518</constant></entry>
+ <entry>'O518'</entry>
+ <entry>OV518 JPEG format used by the gspca driver.</entry>
+ </row>
+ <row id="V4L2-PIX-FMT-PJPG">
+ <entry><constant>V4L2_PIX_FMT_PJPG</constant></entry>
+ <entry>'PJPG'</entry>
+ <entry>Pixart 73xx JPEG format used by the gspca driver.</entry>
+ </row>
+ <row id="V4L2-PIX-FMT-SE401">
+ <entry><constant>V4L2_PIX_FMT_SE401</constant></entry>
+ <entry>'S401'</entry>
+ <entry>Compressed RGB format used by the gspca se401 driver</entry>
+ </row>
+ <row id="V4L2-PIX-FMT-SQ905C">
+ <entry><constant>V4L2_PIX_FMT_SQ905C</constant></entry>
+ <entry>'905C'</entry>
+ <entry>Compressed RGGB bayer format used by the gspca driver.</entry>
+ </row>
+ <row id="V4L2-PIX-FMT-MJPEG">
+ <entry><constant>V4L2_PIX_FMT_MJPEG</constant></entry>
+ <entry>'MJPG'</entry>
+ <entry>Compressed format used by the Zoran driver</entry>
+ </row>
+ <row id="V4L2-PIX-FMT-PWC1">
+ <entry><constant>V4L2_PIX_FMT_PWC1</constant></entry>
+ <entry>'PWC1'</entry>
+ <entry>Compressed format of the PWC driver.</entry>
+ </row>
+ <row id="V4L2-PIX-FMT-PWC2">
+ <entry><constant>V4L2_PIX_FMT_PWC2</constant></entry>
+ <entry>'PWC2'</entry>
+ <entry>Compressed format of the PWC driver.</entry>
+ </row>
+ <row id="V4L2-PIX-FMT-SN9C10X">
+ <entry><constant>V4L2_PIX_FMT_SN9C10X</constant></entry>
+ <entry>'S910'</entry>
+ <entry>Compressed format of the SN9C102 driver.</entry>
+ </row>
+ <row id="V4L2-PIX-FMT-SN9C20X-I420">
+ <entry><constant>V4L2_PIX_FMT_SN9C20X_I420</constant></entry>
+ <entry>'S920'</entry>
+ <entry>YUV 4:2:0 format of the gspca sn9c20x driver.</entry>
+ </row>
+ <row id="V4L2-PIX-FMT-SN9C2028">
+ <entry><constant>V4L2_PIX_FMT_SN9C2028</constant></entry>
+ <entry>'SONX'</entry>
+ <entry>Compressed GBRG bayer format of the gspca sn9c2028 driver.</entry>
+ </row>
+ <row id="V4L2-PIX-FMT-STV0680">
+ <entry><constant>V4L2_PIX_FMT_STV0680</constant></entry>
+ <entry>'S680'</entry>
+ <entry>Bayer format of the gspca stv0680 driver.</entry>
+ </row>
+ <row id="V4L2-PIX-FMT-WNVA">
+ <entry><constant>V4L2_PIX_FMT_WNVA</constant></entry>
+ <entry>'WNVA'</entry>
+ <entry><para>Used by the Winnov Videum driver, <ulink
+url="http://www.thedirks.org/winnov/">
+http://www.thedirks.org/winnov/</ulink></para></entry>
+ </row>
+ <row id="V4L2-PIX-FMT-TM6000">
+ <entry><constant>V4L2_PIX_FMT_TM6000</constant></entry>
+ <entry>'TM60'</entry>
+ <entry><para>Used by Trident tm6000</para></entry>
+ </row>
+ <row id="V4L2-PIX-FMT-CIT-YYVYUY">
+ <entry><constant>V4L2_PIX_FMT_CIT_YYVYUY</constant></entry>
+ <entry>'CITV'</entry>
+ <entry><para>Used by xirlink CIT, found at IBM webcams.</para>
+ <para>Uses one line of Y then 1 line of VYUY</para>
+ </entry>
+ </row>
+ <row id="V4L2-PIX-FMT-KONICA420">
+ <entry><constant>V4L2_PIX_FMT_KONICA420</constant></entry>
+ <entry>'KONI'</entry>
+ <entry><para>Used by Konica webcams.</para>
+ <para>YUV420 planar in blocks of 256 pixels.</para>
+ </entry>
+ </row>
+ <row id="V4L2-PIX-FMT-YYUV">
+ <entry><constant>V4L2_PIX_FMT_YYUV</constant></entry>
+ <entry>'YYUV'</entry>
+ <entry>unknown</entry>
+ </row>
+ <row id="V4L2-PIX-FMT-Y4">
+ <entry><constant>V4L2_PIX_FMT_Y4</constant></entry>
+ <entry>'Y04 '</entry>
+ <entry>Old 4-bit greyscale format. Only the most significant 4 bits of each byte are used,
+the other bits are set to 0.</entry>
+ </row>
+ <row id="V4L2-PIX-FMT-Y6">
+ <entry><constant>V4L2_PIX_FMT_Y6</constant></entry>
+ <entry>'Y06 '</entry>
+ <entry>Old 6-bit greyscale format. Only the most significant 6 bits of each byte are used,
+the other bits are set to 0.</entry>
+ </row>
+ <row id="V4L2-PIX-FMT-S5C-UYVY-JPG">
+ <entry><constant>V4L2_PIX_FMT_S5C_UYVY_JPG</constant></entry>
+ <entry>'S5CI'</entry>
+ <entry>Two-planar format used by Samsung S5C73MX cameras. The
+first plane contains interleaved JPEG and UYVY image data, followed by meta data
+in form of an array of offsets to the UYVY data blocks. The actual pointer array
+follows immediately the interleaved JPEG/UYVY data, the number of entries in
+this array equals the height of the UYVY image. Each entry is a 4-byte unsigned
+integer in big endian order and it's an offset to a single pixel line of the
+UYVY image. The first plane can start either with JPEG or UYVY data chunk. The
+size of a single UYVY block equals the UYVY image's width multiplied by 2. The
+size of a JPEG chunk depends on the image and can vary with each line.
+<para>The second plane, at an offset of 4084 bytes, contains a 4-byte offset to
+the pointer array in the first plane. This offset is followed by a 4-byte value
+indicating size of the pointer array. All numbers in the second plane are also
+in big endian order. Remaining data in the second plane is undefined. The
+information in the second plane allows to easily find location of the pointer
+array, which can be different for each frame. The size of the pointer array is
+constant for given UYVY image height.</para>
+<para>In order to extract UYVY and JPEG frames an application can initially set
+a data pointer to the start of first plane and then add an offset from the first
+entry of the pointers table. Such a pointer indicates start of an UYVY image
+pixel line. Whole UYVY line can be copied to a separate buffer. These steps
+should be repeated for each line, i.e. the number of entries in the pointer
+array. Anything what's in between the UYVY lines is JPEG data and should be
+concatenated to form the JPEG stream. </para>
+</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table frame="none" pgwide="1" id="format-flags">
+ <title>Format Flags</title>
+ <tgroup cols="3">
+ &cs-def;
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_PIX_FMT_FLAG_PREMUL_ALPHA</constant></entry>
+ <entry>0x00000001</entry>
+ <entry>The color values are premultiplied by the alpha channel
+value. For example, if a light blue pixel with 50% transparency was described by
+RGBA values (128, 192, 255, 128), the same pixel described with premultiplied
+colors would be described by RGBA values (64, 96, 128, 128) </entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </section>
diff --git a/Documentation/DocBook/media/v4l/planar-apis.xml b/Documentation/DocBook/media/v4l/planar-apis.xml
new file mode 100644
index 000000000..878ce2040
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/planar-apis.xml
@@ -0,0 +1,62 @@
+<section id="planar-apis">
+ <title>Single- and multi-planar APIs</title>
+
+ <para>Some devices require data for each input or output video frame
+ to be placed in discontiguous memory buffers. In such cases, one
+ video frame has to be addressed using more than one memory address, i.e. one
+ pointer per "plane". A plane is a sub-buffer of the current frame. For
+ examples of such formats see <xref linkend="pixfmt" />.</para>
+
+ <para>Initially, V4L2 API did not support multi-planar buffers and a set of
+ extensions has been introduced to handle them. Those extensions constitute
+ what is being referred to as the "multi-planar API".</para>
+
+ <para>Some of the V4L2 API calls and structures are interpreted differently,
+ depending on whether single- or multi-planar API is being used. An application
+ can choose whether to use one or the other by passing a corresponding buffer
+ type to its ioctl calls. Multi-planar versions of buffer types are suffixed
+ with an `_MPLANE' string. For a list of available multi-planar buffer types
+ see &v4l2-buf-type;.
+ </para>
+
+ <section>
+ <title>Multi-planar formats</title>
+ <para>Multi-planar API introduces new multi-planar formats. Those formats
+ use a separate set of FourCC codes. It is important to distinguish between
+ the multi-planar API and a multi-planar format. Multi-planar API calls can
+ handle all single-planar formats as well (as long as they are passed in
+ multi-planar API structures), while the single-planar API cannot
+ handle multi-planar formats.</para>
+ </section>
+
+ <section>
+ <title>Calls that distinguish between single and multi-planar APIs</title>
+ <variablelist>
+ <varlistentry>
+ <term>&VIDIOC-QUERYCAP;</term>
+ <listitem><para>Two additional multi-planar capabilities are added. They can
+ be set together with non-multi-planar ones for devices that handle
+ both single- and multi-planar formats.</para></listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>&VIDIOC-G-FMT;, &VIDIOC-S-FMT;, &VIDIOC-TRY-FMT;</term>
+ <listitem><para>New structures for describing multi-planar formats are added:
+ &v4l2-pix-format-mplane; and &v4l2-plane-pix-format;. Drivers may
+ define new multi-planar formats, which have distinct FourCC codes from
+ the existing single-planar ones.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>&VIDIOC-QBUF;, &VIDIOC-DQBUF;, &VIDIOC-QUERYBUF;</term>
+ <listitem><para>A new &v4l2-plane; structure for describing planes is added.
+ Arrays of this structure are passed in the new
+ <structfield>m.planes</structfield> field of &v4l2-buffer;.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>&VIDIOC-REQBUFS;</term>
+ <listitem><para>Will allocate multi-planar buffers as requested.</para></listitem>
+ </varlistentry>
+ </variablelist>
+ </section>
+</section>
diff --git a/Documentation/DocBook/media/v4l/remote_controllers.xml b/Documentation/DocBook/media/v4l/remote_controllers.xml
new file mode 100644
index 000000000..5124a6c4d
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/remote_controllers.xml
@@ -0,0 +1,320 @@
+<partinfo>
+<authorgroup>
+<author>
+<firstname>Mauro</firstname>
+<surname>Chehab</surname>
+<othername role="mi">Carvalho</othername>
+<affiliation><address><email>m.chehab@samsung.com</email></address></affiliation>
+<contrib>Initial version.</contrib>
+</author>
+</authorgroup>
+<copyright>
+ <year>2009-2014</year>
+ <holder>Mauro Carvalho Chehab</holder>
+</copyright>
+
+<revhistory>
+<!-- Put document revisions here, newest first. -->
+<revision>
+<revnumber>3.15</revnumber>
+<date>2014-02-06</date>
+<authorinitials>mcc</authorinitials>
+<revremark>Added the interface description and the RC sysfs class description.</revremark>
+</revision>
+<revision>
+<revnumber>1.0</revnumber>
+<date>2009-09-06</date>
+<authorinitials>mcc</authorinitials>
+<revremark>Initial revision</revremark>
+</revision>
+</revhistory>
+</partinfo>
+
+ <title>Remote Controller API</title>
+ <chapter id="remote_controllers">
+
+<title>Remote Controllers</title>
+
+<section id="Remote_controllers_Intro">
+<title>Introduction</title>
+
+<para>Currently, most analog and digital devices have a Infrared input for remote controllers. Each
+manufacturer has their own type of control. It is not rare for the same manufacturer to ship different
+types of controls, depending on the device.</para>
+<para>A Remote Controller interface is mapped as a normal evdev/input interface, just like a keyboard or a mouse.
+So, it uses all ioctls already defined for any other input devices.</para>
+<para>However, remove controllers are more flexible than a normal input device, as the IR
+receiver (and/or transmitter) can be used in conjunction with a wide variety of different IR remotes.</para>
+<para>In order to allow flexibility, the Remote Controller subsystem allows controlling the
+RC-specific attributes via <link linkend="remote_controllers_sysfs_nodes">the sysfs class nodes</link>.</para>
+</section>
+
+<section id="remote_controllers_sysfs_nodes">
+<title>Remote Controller's sysfs nodes</title>
+<para>As defined at <constant>Documentation/ABI/testing/sysfs-class-rc</constant>, those are the sysfs nodes that control the Remote Controllers:</para>
+
+<section id="sys_class_rc">
+<title>/sys/class/rc/</title>
+<para>The <constant>/sys/class/rc/</constant> class sub-directory belongs to the Remote Controller
+core and provides a sysfs interface for configuring infrared remote controller receivers.
+</para>
+
+</section>
+<section id="sys_class_rc_rcN">
+<title>/sys/class/rc/rcN/</title>
+<para>A <constant>/sys/class/rc/rcN</constant> directory is created for each remote
+ control receiver device where N is the number of the receiver.</para>
+
+</section>
+<section id="sys_class_rc_rcN_protocols">
+<title>/sys/class/rc/rcN/protocols</title>
+<para>Reading this file returns a list of available protocols, something like:</para>
+<para><constant>rc5 [rc6] nec jvc [sony]</constant></para>
+<para>Enabled protocols are shown in [] brackets.</para>
+<para>Writing "+proto" will add a protocol to the list of enabled protocols.</para>
+<para>Writing "-proto" will remove a protocol from the list of enabled protocols.</para>
+<para>Writing "proto" will enable only "proto".</para>
+<para>Writing "none" will disable all protocols.</para>
+<para>Write fails with EINVAL if an invalid protocol combination or unknown protocol name is used.</para>
+
+</section>
+<section id="sys_class_rc_rcN_filter">
+<title>/sys/class/rc/rcN/filter</title>
+<para>Sets the scancode filter expected value.</para>
+<para>Use in combination with <constant>/sys/class/rc/rcN/filter_mask</constant> to set the
+expected value of the bits set in the filter mask.
+If the hardware supports it then scancodes which do not match
+the filter will be ignored. Otherwise the write will fail with
+an error.</para>
+<para>This value may be reset to 0 if the current protocol is altered.</para>
+
+</section>
+<section id="sys_class_rc_rcN_filter_mask">
+<title>/sys/class/rc/rcN/filter_mask</title>
+<para>Sets the scancode filter mask of bits to compare.
+Use in combination with <constant>/sys/class/rc/rcN/filter</constant> to set the bits
+of the scancode which should be compared against the expected
+value. A value of 0 disables the filter to allow all valid
+scancodes to be processed.</para>
+<para>If the hardware supports it then scancodes which do not match
+the filter will be ignored. Otherwise the write will fail with
+an error.</para>
+<para>This value may be reset to 0 if the current protocol is altered.</para>
+
+</section>
+<section id="sys_class_rc_rcN_wakeup_protocols">
+<title>/sys/class/rc/rcN/wakeup_protocols</title>
+<para>Reading this file returns a list of available protocols to use for the
+wakeup filter, something like:</para>
+<para><constant>rc5 rc6 nec jvc [sony]</constant></para>
+<para>The enabled wakeup protocol is shown in [] brackets.</para>
+<para>Writing "+proto" will add a protocol to the list of enabled wakeup
+protocols.</para>
+<para>Writing "-proto" will remove a protocol from the list of enabled wakeup
+protocols.</para>
+<para>Writing "proto" will use "proto" for wakeup events.</para>
+<para>Writing "none" will disable wakeup.</para>
+<para>Write fails with EINVAL if an invalid protocol combination or unknown
+protocol name is used, or if wakeup is not supported by the hardware.</para>
+
+</section>
+<section id="sys_class_rc_rcN_wakeup_filter">
+<title>/sys/class/rc/rcN/wakeup_filter</title>
+<para>Sets the scancode wakeup filter expected value.
+Use in combination with <constant>/sys/class/rc/rcN/wakeup_filter_mask</constant> to
+set the expected value of the bits set in the wakeup filter mask
+to trigger a system wake event.</para>
+<para>If the hardware supports it and wakeup_filter_mask is not 0 then
+scancodes which match the filter will wake the system from e.g.
+suspend to RAM or power off.
+Otherwise the write will fail with an error.</para>
+<para>This value may be reset to 0 if the wakeup protocol is altered.</para>
+
+</section>
+<section id="sys_class_rc_rcN_wakeup_filter_mask">
+<title>/sys/class/rc/rcN/wakeup_filter_mask</title>
+<para>Sets the scancode wakeup filter mask of bits to compare.
+Use in combination with <constant>/sys/class/rc/rcN/wakeup_filter</constant> to set
+the bits of the scancode which should be compared against the
+expected value to trigger a system wake event.</para>
+<para>If the hardware supports it and wakeup_filter_mask is not 0 then
+scancodes which match the filter will wake the system from e.g.
+suspend to RAM or power off.
+Otherwise the write will fail with an error.</para>
+<para>This value may be reset to 0 if the wakeup protocol is altered.</para>
+</section>
+</section>
+
+<section id="Remote_controllers_tables">
+<title>Remote controller tables</title>
+<para>Unfortunately, for several years, there was no effort to create uniform IR keycodes for
+different devices. This caused the same IR keyname to be mapped completely differently on
+different IR devices. This resulted that the same IR keyname to be mapped completely different on
+different IR's. Due to that, V4L2 API now specifies a standard for mapping Media keys on IR.</para>
+<para>This standard should be used by both V4L/DVB drivers and userspace applications</para>
+<para>The modules register the remote as keyboard within the linux input layer. This means that the IR key strokes will look like normal keyboard key strokes (if CONFIG_INPUT_KEYBOARD is enabled). Using the event devices (CONFIG_INPUT_EVDEV) it is possible for applications to access the remote via /dev/input/event devices.</para>
+
+<table pgwide="1" frame="none" id="rc_standard_keymap">
+<title>IR default keymapping</title>
+<tgroup cols="3">
+&cs-str;
+<tbody valign="top">
+<row>
+<entry>Key code</entry>
+<entry>Meaning</entry>
+<entry>Key examples on IR</entry>
+</row>
+
+<row><entry><emphasis role="bold">Numeric keys</emphasis></entry></row>
+
+<row><entry><constant>KEY_0</constant></entry><entry>Keyboard digit 0</entry><entry>0</entry></row>
+<row><entry><constant>KEY_1</constant></entry><entry>Keyboard digit 1</entry><entry>1</entry></row>
+<row><entry><constant>KEY_2</constant></entry><entry>Keyboard digit 2</entry><entry>2</entry></row>
+<row><entry><constant>KEY_3</constant></entry><entry>Keyboard digit 3</entry><entry>3</entry></row>
+<row><entry><constant>KEY_4</constant></entry><entry>Keyboard digit 4</entry><entry>4</entry></row>
+<row><entry><constant>KEY_5</constant></entry><entry>Keyboard digit 5</entry><entry>5</entry></row>
+<row><entry><constant>KEY_6</constant></entry><entry>Keyboard digit 6</entry><entry>6</entry></row>
+<row><entry><constant>KEY_7</constant></entry><entry>Keyboard digit 7</entry><entry>7</entry></row>
+<row><entry><constant>KEY_8</constant></entry><entry>Keyboard digit 8</entry><entry>8</entry></row>
+<row><entry><constant>KEY_9</constant></entry><entry>Keyboard digit 9</entry><entry>9</entry></row>
+
+<row><entry><emphasis role="bold">Movie play control</emphasis></entry></row>
+
+<row><entry><constant>KEY_FORWARD</constant></entry><entry>Instantly advance in time</entry><entry>&gt;&gt; / FORWARD</entry></row>
+<row><entry><constant>KEY_BACK</constant></entry><entry>Instantly go back in time</entry><entry>&lt;&lt;&lt; / BACK</entry></row>
+<row><entry><constant>KEY_FASTFORWARD</constant></entry><entry>Play movie faster</entry><entry>&gt;&gt;&gt; / FORWARD</entry></row>
+<row><entry><constant>KEY_REWIND</constant></entry><entry>Play movie back</entry><entry>REWIND / BACKWARD</entry></row>
+<row><entry><constant>KEY_NEXT</constant></entry><entry>Select next chapter / sub-chapter / interval</entry><entry>NEXT / SKIP</entry></row>
+<row><entry><constant>KEY_PREVIOUS</constant></entry><entry>Select previous chapter / sub-chapter / interval</entry><entry>&lt;&lt; / PREV / PREVIOUS</entry></row>
+<row><entry><constant>KEY_AGAIN</constant></entry><entry>Repeat the video or a video interval</entry><entry>REPEAT / LOOP / RECALL</entry></row>
+<row><entry><constant>KEY_PAUSE</constant></entry><entry>Pause sroweam</entry><entry>PAUSE / FREEZE</entry></row>
+<row><entry><constant>KEY_PLAY</constant></entry><entry>Play movie at the normal timeshift</entry><entry>NORMAL TIMESHIFT / LIVE / &gt;</entry></row>
+<row><entry><constant>KEY_PLAYPAUSE</constant></entry><entry>Alternate between play and pause</entry><entry>PLAY / PAUSE</entry></row>
+<row><entry><constant>KEY_STOP</constant></entry><entry>Stop sroweam</entry><entry>STOP</entry></row>
+<row><entry><constant>KEY_RECORD</constant></entry><entry>Start/stop recording sroweam</entry><entry>CAPTURE / REC / RECORD/PAUSE</entry></row>
+<row><entry><constant>KEY_CAMERA</constant></entry><entry>Take a picture of the image</entry><entry>CAMERA ICON / CAPTURE / SNAPSHOT</entry></row>
+<row><entry><constant>KEY_SHUFFLE</constant></entry><entry>Enable shuffle mode</entry><entry>SHUFFLE</entry></row>
+<row><entry><constant>KEY_TIME</constant></entry><entry>Activate time shift mode</entry><entry>TIME SHIFT</entry></row>
+<row><entry><constant>KEY_TITLE</constant></entry><entry>Allow changing the chapter</entry><entry>CHAPTER</entry></row>
+<row><entry><constant>KEY_SUBTITLE</constant></entry><entry>Allow changing the subtitle</entry><entry>SUBTITLE</entry></row>
+
+<row><entry><emphasis role="bold">Image control</emphasis></entry></row>
+
+<row><entry><constant>KEY_BRIGHTNESSDOWN</constant></entry><entry>Decrease Brightness</entry><entry>BRIGHTNESS DECREASE</entry></row>
+<row><entry><constant>KEY_BRIGHTNESSUP</constant></entry><entry>Increase Brightness</entry><entry>BRIGHTNESS INCREASE</entry></row>
+
+<row><entry><constant>KEY_ANGLE</constant></entry><entry>Switch video camera angle (on videos with more than one angle stored)</entry><entry>ANGLE / SWAP</entry></row>
+<row><entry><constant>KEY_EPG</constant></entry><entry>Open the Elecrowonic Play Guide (EPG)</entry><entry>EPG / GUIDE</entry></row>
+<row><entry><constant>KEY_TEXT</constant></entry><entry>Activate/change closed caption mode</entry><entry>CLOSED CAPTION/TELETEXT / DVD TEXT / TELETEXT / TTX</entry></row>
+
+<row><entry><emphasis role="bold">Audio control</emphasis></entry></row>
+
+<row><entry><constant>KEY_AUDIO</constant></entry><entry>Change audio source</entry><entry>AUDIO SOURCE / AUDIO / MUSIC</entry></row>
+<row><entry><constant>KEY_MUTE</constant></entry><entry>Mute/unmute audio</entry><entry>MUTE / DEMUTE / UNMUTE</entry></row>
+<row><entry><constant>KEY_VOLUMEDOWN</constant></entry><entry>Decrease volume</entry><entry>VOLUME- / VOLUME DOWN</entry></row>
+<row><entry><constant>KEY_VOLUMEUP</constant></entry><entry>Increase volume</entry><entry>VOLUME+ / VOLUME UP</entry></row>
+<row><entry><constant>KEY_MODE</constant></entry><entry>Change sound mode</entry><entry>MONO/STEREO</entry></row>
+<row><entry><constant>KEY_LANGUAGE</constant></entry><entry>Select Language</entry><entry>1ST / 2ND LANGUAGE / DVD LANG / MTS/SAP / MTS SEL</entry></row>
+
+<row><entry><emphasis role="bold">Channel control</emphasis></entry></row>
+
+<row><entry><constant>KEY_CHANNEL</constant></entry><entry>Go to the next favorite channel</entry><entry>ALT / CHANNEL / CH SURFING / SURF / FAV</entry></row>
+<row><entry><constant>KEY_CHANNELDOWN</constant></entry><entry>Decrease channel sequencially</entry><entry>CHANNEL - / CHANNEL DOWN / DOWN</entry></row>
+<row><entry><constant>KEY_CHANNELUP</constant></entry><entry>Increase channel sequencially</entry><entry>CHANNEL + / CHANNEL UP / UP</entry></row>
+<row><entry><constant>KEY_DIGITS</constant></entry><entry>Use more than one digit for channel</entry><entry>PLUS / 100/ 1xx / xxx / -/-- / Single Double Triple Digit</entry></row>
+<row><entry><constant>KEY_SEARCH</constant></entry><entry>Start channel autoscan</entry><entry>SCAN / AUTOSCAN</entry></row>
+
+<row><entry><emphasis role="bold">Colored keys</emphasis></entry></row>
+
+<row><entry><constant>KEY_BLUE</constant></entry><entry>IR Blue key</entry><entry>BLUE</entry></row>
+<row><entry><constant>KEY_GREEN</constant></entry><entry>IR Green Key</entry><entry>GREEN</entry></row>
+<row><entry><constant>KEY_RED</constant></entry><entry>IR Red key</entry><entry>RED</entry></row>
+<row><entry><constant>KEY_YELLOW</constant></entry><entry>IR Yellow key</entry><entry> YELLOW</entry></row>
+
+<row><entry><emphasis role="bold">Media selection</emphasis></entry></row>
+
+<row><entry><constant>KEY_CD</constant></entry><entry>Change input source to Compact Disc</entry><entry>CD</entry></row>
+<row><entry><constant>KEY_DVD</constant></entry><entry>Change input to DVD</entry><entry>DVD / DVD MENU</entry></row>
+<row><entry><constant>KEY_EJECTCLOSECD</constant></entry><entry>Open/close the CD/DVD player</entry><entry>-&gt; ) / CLOSE / OPEN</entry></row>
+
+<row><entry><constant>KEY_MEDIA</constant></entry><entry>Turn on/off Media application</entry><entry>PC/TV / TURN ON/OFF APP</entry></row>
+<row><entry><constant>KEY_PC</constant></entry><entry>Selects from TV to PC</entry><entry>PC</entry></row>
+<row><entry><constant>KEY_RADIO</constant></entry><entry>Put into AM/FM radio mode</entry><entry>RADIO / TV/FM / TV/RADIO / FM / FM/RADIO</entry></row>
+<row><entry><constant>KEY_TV</constant></entry><entry>Select tv mode</entry><entry>TV / LIVE TV</entry></row>
+<row><entry><constant>KEY_TV2</constant></entry><entry>Select Cable mode</entry><entry>AIR/CBL</entry></row>
+<row><entry><constant>KEY_VCR</constant></entry><entry>Select VCR mode</entry><entry>VCR MODE / DTR</entry></row>
+<row><entry><constant>KEY_VIDEO</constant></entry><entry>Alternate between input modes</entry><entry>SOURCE / SELECT / DISPLAY / SWITCH INPUTS / VIDEO</entry></row>
+
+<row><entry><emphasis role="bold">Power control</emphasis></entry></row>
+
+<row><entry><constant>KEY_POWER</constant></entry><entry>Turn on/off computer</entry><entry>SYSTEM POWER / COMPUTER POWER</entry></row>
+<row><entry><constant>KEY_POWER2</constant></entry><entry>Turn on/off application</entry><entry>TV ON/OFF / POWER</entry></row>
+<row><entry><constant>KEY_SLEEP</constant></entry><entry>Activate sleep timer</entry><entry>SLEEP / SLEEP TIMER</entry></row>
+<row><entry><constant>KEY_SUSPEND</constant></entry><entry>Put computer into suspend mode</entry><entry>STANDBY / SUSPEND</entry></row>
+
+<row><entry><emphasis role="bold">Window control</emphasis></entry></row>
+
+<row><entry><constant>KEY_CLEAR</constant></entry><entry>Stop sroweam and return to default input video/audio</entry><entry>CLEAR / RESET / BOSS KEY</entry></row>
+<row><entry><constant>KEY_CYCLEWINDOWS</constant></entry><entry>Minimize windows and move to the next one</entry><entry>ALT-TAB / MINIMIZE / DESKTOP</entry></row>
+<row><entry><constant>KEY_FAVORITES</constant></entry><entry>Open the favorites sroweam window</entry><entry>TV WALL / Favorites</entry></row>
+<row><entry><constant>KEY_MENU</constant></entry><entry>Call application menu</entry><entry>2ND CONTROLS (USA: MENU) / DVD/MENU / SHOW/HIDE CTRL</entry></row>
+<row><entry><constant>KEY_NEW</constant></entry><entry>Open/Close Picture in Picture</entry><entry>PIP</entry></row>
+<row><entry><constant>KEY_OK</constant></entry><entry>Send a confirmation code to application</entry><entry>OK / ENTER / RETURN</entry></row>
+<row><entry><constant>KEY_SCREEN</constant></entry><entry>Select screen aspect ratio</entry><entry>4:3 16:9 SELECT</entry></row>
+<row><entry><constant>KEY_ZOOM</constant></entry><entry>Put device into zoom/full screen mode</entry><entry>ZOOM / FULL SCREEN / ZOOM+ / HIDE PANNEL / SWITCH</entry></row>
+
+<row><entry><emphasis role="bold">Navigation keys</emphasis></entry></row>
+
+<row><entry><constant>KEY_ESC</constant></entry><entry>Cancel current operation</entry><entry>CANCEL / BACK</entry></row>
+<row><entry><constant>KEY_HELP</constant></entry><entry>Open a Help window</entry><entry>HELP</entry></row>
+<row><entry><constant>KEY_HOMEPAGE</constant></entry><entry>Navigate to Homepage</entry><entry>HOME</entry></row>
+<row><entry><constant>KEY_INFO</constant></entry><entry>Open On Screen Display</entry><entry>DISPLAY INFORMATION / OSD</entry></row>
+<row><entry><constant>KEY_WWW</constant></entry><entry>Open the default browser</entry><entry>WEB</entry></row>
+<row><entry><constant>KEY_UP</constant></entry><entry>Up key</entry><entry>UP</entry></row>
+<row><entry><constant>KEY_DOWN</constant></entry><entry>Down key</entry><entry>DOWN</entry></row>
+<row><entry><constant>KEY_LEFT</constant></entry><entry>Left key</entry><entry>LEFT</entry></row>
+<row><entry><constant>KEY_RIGHT</constant></entry><entry>Right key</entry><entry>RIGHT</entry></row>
+
+<row><entry><emphasis role="bold">Miscellaneous keys</emphasis></entry></row>
+
+<row><entry><constant>KEY_DOT</constant></entry><entry>Return a dot</entry><entry>.</entry></row>
+<row><entry><constant>KEY_FN</constant></entry><entry>Select a function</entry><entry>FUNCTION</entry></row>
+
+</tbody>
+</tgroup>
+</table>
+
+<para>It should be noticed that, sometimes, there some fundamental missing keys at some cheaper IR's. Due to that, it is recommended to:</para>
+
+<table pgwide="1" frame="none" id="rc_keymap_notes">
+<title>Notes</title>
+<tgroup cols="1">
+&cs-str;
+<tbody valign="top">
+<row>
+<entry>On simpler IR's, without separate channel keys, you need to map UP as <constant>KEY_CHANNELUP</constant></entry>
+</row><row>
+<entry>On simpler IR's, without separate channel keys, you need to map DOWN as <constant>KEY_CHANNELDOWN</constant></entry>
+</row><row>
+<entry>On simpler IR's, without separate volume keys, you need to map LEFT as <constant>KEY_VOLUMEDOWN</constant></entry>
+</row><row>
+<entry>On simpler IR's, without separate volume keys, you need to map RIGHT as <constant>KEY_VOLUMEUP</constant></entry>
+</row>
+</tbody>
+</tgroup>
+</table>
+
+</section>
+
+<section id="Remote_controllers_table_change">
+<title>Changing default Remote Controller mappings</title>
+<para>The event interface provides two ioctls to be used against
+the /dev/input/event device, to allow changing the default
+keymapping.</para>
+
+<para>This program demonstrates how to replace the keymap tables.</para>
+&sub-keytable-c;
+</section>
+
+&sub-lirc_device_interface;
+</chapter>
diff --git a/Documentation/DocBook/media/v4l/selection-api.xml b/Documentation/DocBook/media/v4l/selection-api.xml
new file mode 100644
index 000000000..28cbded76
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/selection-api.xml
@@ -0,0 +1,324 @@
+<section id="selection-api">
+
+ <title>Experimental API for cropping, composing and scaling</title>
+
+ <note>
+ <title>Experimental</title>
+
+ <para>This is an <link linkend="experimental">experimental</link>
+interface and may change in the future.</para>
+ </note>
+
+ <section>
+ <title>Introduction</title>
+
+<para>Some video capture devices can sample a subsection of a picture and
+shrink or enlarge it to an image of arbitrary size. Next, the devices can
+insert the image into larger one. Some video output devices can crop part of an
+input image, scale it up or down and insert it at an arbitrary scan line and
+horizontal offset into a video signal. We call these abilities cropping,
+scaling and composing.</para>
+
+<para>On a video <emphasis>capture</emphasis> device the source is a video
+signal, and the cropping target determine the area actually sampled. The sink
+is an image stored in a memory buffer. The composing area specifies which part
+of the buffer is actually written to by the hardware. </para>
+
+<para>On a video <emphasis>output</emphasis> device the source is an image in a
+memory buffer, and the cropping target is a part of an image to be shown on a
+display. The sink is the display or the graphics screen. The application may
+select the part of display where the image should be displayed. The size and
+position of such a window is controlled by the compose target.</para>
+
+<para>Rectangles for all cropping and composing targets are defined even if the
+device does supports neither cropping nor composing. Their size and position
+will be fixed in such a case. If the device does not support scaling then the
+cropping and composing rectangles have the same size.</para>
+
+ </section>
+
+ <section>
+ <title>Selection targets</title>
+
+ <para>
+ <figure id="sel-targets-capture">
+ <title>Cropping and composing targets</title>
+ <mediaobject>
+ <imageobject>
+ <imagedata fileref="selection.png" format="PNG" />
+ </imageobject>
+ <textobject>
+ <phrase>Targets used by a cropping, composing and scaling
+ process</phrase>
+ </textobject>
+ </mediaobject>
+ </figure>
+ </para>
+
+ <para>See <xref linkend="v4l2-selection-targets" /> for more
+ information.</para>
+ </section>
+
+ <section>
+
+ <title>Configuration</title>
+
+<para>Applications can use the <link linkend="vidioc-g-selection">selection
+API</link> to select an area in a video signal or a buffer, and to query for
+default settings and hardware limits.</para>
+
+<para>Video hardware can have various cropping, composing and scaling
+limitations. It may only scale up or down, support only discrete scaling
+factors, or have different scaling abilities in the horizontal and vertical
+directions. Also it may not support scaling at all. At the same time the
+cropping/composing rectangles may have to be aligned, and both the source and
+the sink may have arbitrary upper and lower size limits. Therefore, as usual,
+drivers are expected to adjust the requested parameters and return the actual
+values selected. An application can control the rounding behaviour using <link
+linkend="v4l2-selection-flags"> constraint flags </link>.</para>
+
+ <section>
+
+ <title>Configuration of video capture</title>
+
+<para>See figure <xref linkend="sel-targets-capture" /> for examples of the
+selection targets available for a video capture device. It is recommended to
+configure the cropping targets before to the composing targets.</para>
+
+<para>The range of coordinates of the top left corner, width and height of
+areas that can be sampled is given by the <constant>V4L2_SEL_TGT_CROP_BOUNDS</constant>
+target. It is recommended for the driver developers to put the
+top/left corner at position <constant>(0,0)</constant>. The rectangle's
+coordinates are expressed in pixels.</para>
+
+<para>The top left corner, width and height of the source rectangle, that is
+the area actually sampled, is given by the <constant>V4L2_SEL_TGT_CROP</constant>
+target. It uses the same coordinate system as <constant>V4L2_SEL_TGT_CROP_BOUNDS</constant>.
+The active cropping area must lie completely inside the capture boundaries. The
+driver may further adjust the requested size and/or position according to hardware
+limitations.</para>
+
+<para>Each capture device has a default source rectangle, given by the
+<constant>V4L2_SEL_TGT_CROP_DEFAULT</constant> target. This rectangle shall
+over what the driver writer considers the complete picture. Drivers shall set
+the active crop rectangle to the default when the driver is first loaded, but
+not later.</para>
+
+<para>The composing targets refer to a memory buffer. The limits of composing
+coordinates are obtained using <constant>V4L2_SEL_TGT_COMPOSE_BOUNDS</constant>.
+All coordinates are expressed in pixels. The rectangle's top/left
+corner must be located at position <constant>(0,0)</constant>. The width and
+height are equal to the image size set by <constant>VIDIOC_S_FMT</constant>.
+</para>
+
+<para>The part of a buffer into which the image is inserted by the hardware is
+controlled by the <constant>V4L2_SEL_TGT_COMPOSE</constant> target.
+The rectangle's coordinates are also expressed in the same coordinate system as
+the bounds rectangle. The composing rectangle must lie completely inside bounds
+rectangle. The driver must adjust the composing rectangle to fit to the
+bounding limits. Moreover, the driver can perform other adjustments according
+to hardware limitations. The application can control rounding behaviour using
+<link linkend="v4l2-selection-flags"> constraint flags</link>.</para>
+
+<para>For capture devices the default composing rectangle is queried using
+<constant>V4L2_SEL_TGT_COMPOSE_DEFAULT</constant>. It is usually equal to the
+bounding rectangle.</para>
+
+<para>The part of a buffer that is modified by the hardware is given by
+<constant>V4L2_SEL_TGT_COMPOSE_PADDED</constant>. It contains all pixels
+defined using <constant>V4L2_SEL_TGT_COMPOSE</constant> plus all
+padding data modified by hardware during insertion process. All pixels outside
+this rectangle <emphasis>must not</emphasis> be changed by the hardware. The
+content of pixels that lie inside the padded area but outside active area is
+undefined. The application can use the padded and active rectangles to detect
+where the rubbish pixels are located and remove them if needed.</para>
+
+ </section>
+
+ <section>
+
+ <title>Configuration of video output</title>
+
+<para>For output devices targets and ioctls are used similarly to the video
+capture case. The <emphasis>composing</emphasis> rectangle refers to the
+insertion of an image into a video signal. The cropping rectangles refer to a
+memory buffer. It is recommended to configure the composing targets before to
+the cropping targets.</para>
+
+<para>The cropping targets refer to the memory buffer that contains an image to
+be inserted into a video signal or graphical screen. The limits of cropping
+coordinates are obtained using <constant>V4L2_SEL_TGT_CROP_BOUNDS</constant>.
+All coordinates are expressed in pixels. The top/left corner is always point
+<constant>(0,0)</constant>. The width and height is equal to the image size
+specified using <constant>VIDIOC_S_FMT</constant> ioctl.</para>
+
+<para>The top left corner, width and height of the source rectangle, that is
+the area from which image date are processed by the hardware, is given by the
+<constant>V4L2_SEL_TGT_CROP</constant>. Its coordinates are expressed
+in in the same coordinate system as the bounds rectangle. The active cropping
+area must lie completely inside the crop boundaries and the driver may further
+adjust the requested size and/or position according to hardware
+limitations.</para>
+
+<para>For output devices the default cropping rectangle is queried using
+<constant>V4L2_SEL_TGT_CROP_DEFAULT</constant>. It is usually equal to the
+bounding rectangle.</para>
+
+<para>The part of a video signal or graphics display where the image is
+inserted by the hardware is controlled by <constant>V4L2_SEL_TGT_COMPOSE</constant>
+target. The rectangle's coordinates are expressed in pixels. The composing
+rectangle must lie completely inside the bounds rectangle. The driver must
+adjust the area to fit to the bounding limits. Moreover, the driver can
+perform other adjustments according to hardware limitations.</para>
+
+<para>The device has a default composing rectangle, given by the
+<constant>V4L2_SEL_TGT_COMPOSE_DEFAULT</constant> target. This rectangle shall cover what
+the driver writer considers the complete picture. It is recommended for the
+driver developers to put the top/left corner at position <constant>(0,0)</constant>.
+Drivers shall set the active composing rectangle to the default
+one when the driver is first loaded.</para>
+
+<para>The devices may introduce additional content to video signal other than
+an image from memory buffers. It includes borders around an image. However,
+such a padded area is driver-dependent feature not covered by this document.
+Driver developers are encouraged to keep padded rectangle equal to active one.
+The padded target is accessed by the <constant>V4L2_SEL_TGT_COMPOSE_PADDED</constant>
+identifier. It must contain all pixels from the <constant>V4L2_SEL_TGT_COMPOSE</constant>
+target.</para>
+
+ </section>
+
+ <section>
+
+ <title>Scaling control</title>
+
+<para>An application can detect if scaling is performed by comparing the width
+and the height of rectangles obtained using <constant>V4L2_SEL_TGT_CROP</constant>
+and <constant>V4L2_SEL_TGT_COMPOSE</constant> targets. If
+these are not equal then the scaling is applied. The application can compute
+the scaling ratios using these values.</para>
+
+ </section>
+
+ </section>
+
+ <section>
+
+ <title>Comparison with old cropping API</title>
+
+<para>The selection API was introduced to cope with deficiencies of previous
+<link linkend="crop"> API</link>, that was designed to control simple capture
+devices. Later the cropping API was adopted by video output drivers. The ioctls
+are used to select a part of the display were the video signal is inserted. It
+should be considered as an API abuse because the described operation is
+actually the composing. The selection API makes a clear distinction between
+composing and cropping operations by setting the appropriate targets. The V4L2
+API lacks any support for composing to and cropping from an image inside a
+memory buffer. The application could configure a capture device to fill only a
+part of an image by abusing V4L2 API. Cropping a smaller image from a larger
+one is achieved by setting the field
+&v4l2-pix-format;<structfield>::bytesperline</structfield>. Introducing an image offsets
+could be done by modifying field &v4l2-buffer;<structfield>::m_userptr</structfield>
+before calling <constant>VIDIOC_QBUF</constant>. Those
+operations should be avoided because they are not portable (endianness), and do
+not work for macroblock and Bayer formats and mmap buffers. The selection API
+deals with configuration of buffer cropping/composing in a clear, intuitive and
+portable way. Next, with the selection API the concepts of the padded target
+and constraints flags are introduced. Finally, &v4l2-crop; and &v4l2-cropcap;
+have no reserved fields. Therefore there is no way to extend their functionality.
+The new &v4l2-selection; provides a lot of place for future
+extensions. Driver developers are encouraged to implement only selection API.
+The former cropping API would be simulated using the new one.</para>
+
+ </section>
+
+ <section>
+ <title>Examples</title>
+ <example>
+ <title>Resetting the cropping parameters</title>
+
+ <para>(A video capture device is assumed; change
+<constant>V4L2_BUF_TYPE_VIDEO_CAPTURE</constant> for other devices; change target to
+<constant>V4L2_SEL_TGT_COMPOSE_*</constant> family to configure composing
+area)</para>
+
+ <programlisting>
+
+ &v4l2-selection; sel = {
+ .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
+ .target = V4L2_SEL_TGT_CROP_DEFAULT,
+ };
+ ret = ioctl(fd, &VIDIOC-G-SELECTION;, &amp;sel);
+ if (ret)
+ exit(-1);
+ sel.target = V4L2_SEL_TGT_CROP;
+ ret = ioctl(fd, &VIDIOC-S-SELECTION;, &amp;sel);
+ if (ret)
+ exit(-1);
+
+ </programlisting>
+ </example>
+
+ <example>
+ <title>Simple downscaling</title>
+ <para>Setting a composing area on output of size of <emphasis> at most
+</emphasis> half of limit placed at a center of a display.</para>
+ <programlisting>
+
+ &v4l2-selection; sel = {
+ .type = V4L2_BUF_TYPE_VIDEO_OUTPUT,
+ .target = V4L2_SEL_TGT_COMPOSE_BOUNDS,
+ };
+ struct v4l2_rect r;
+
+ ret = ioctl(fd, &VIDIOC-G-SELECTION;, &amp;sel);
+ if (ret)
+ exit(-1);
+ /* setting smaller compose rectangle */
+ r.width = sel.r.width / 2;
+ r.height = sel.r.height / 2;
+ r.left = sel.r.width / 4;
+ r.top = sel.r.height / 4;
+ sel.r = r;
+ sel.target = V4L2_SEL_TGT_COMPOSE;
+ sel.flags = V4L2_SEL_FLAG_LE;
+ ret = ioctl(fd, &VIDIOC-S-SELECTION;, &amp;sel);
+ if (ret)
+ exit(-1);
+
+ </programlisting>
+ </example>
+
+ <example>
+ <title>Querying for scaling factors</title>
+ <para>A video output device is assumed; change
+<constant>V4L2_BUF_TYPE_VIDEO_OUTPUT</constant> for other devices</para>
+ <programlisting>
+
+ &v4l2-selection; compose = {
+ .type = V4L2_BUF_TYPE_VIDEO_OUTPUT,
+ .target = V4L2_SEL_TGT_COMPOSE,
+ };
+ &v4l2-selection; crop = {
+ .type = V4L2_BUF_TYPE_VIDEO_OUTPUT,
+ .target = V4L2_SEL_TGT_CROP,
+ };
+ double hscale, vscale;
+
+ ret = ioctl(fd, &VIDIOC-G-SELECTION;, &amp;compose);
+ if (ret)
+ exit(-1);
+ ret = ioctl(fd, &VIDIOC-G-SELECTION;, &amp;crop);
+ if (ret)
+ exit(-1);
+
+ /* computing scaling factors */
+ hscale = (double)compose.r.width / crop.r.width;
+ vscale = (double)compose.r.height / crop.r.height;
+
+ </programlisting>
+ </example>
+
+ </section>
+
+</section>
diff --git a/Documentation/DocBook/media/v4l/selections-common.xml b/Documentation/DocBook/media/v4l/selections-common.xml
new file mode 100644
index 000000000..d6d56fb6f
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/selections-common.xml
@@ -0,0 +1,180 @@
+<section id="v4l2-selections-common">
+
+ <title>Common selection definitions</title>
+
+ <para>While the <link linkend="selection-api">V4L2 selection
+ API</link> and <link linkend="v4l2-subdev-selections">V4L2 subdev
+ selection APIs</link> are very similar, there's one fundamental
+ difference between the two. On sub-device API, the selection
+ rectangle refers to the media bus format, and is bound to a
+ sub-device's pad. On the V4L2 interface the selection rectangles
+ refer to the in-memory pixel format.</para>
+
+ <para>This section defines the common definitions of the
+ selection interfaces on the two APIs.</para>
+
+ <section id="v4l2-selection-targets">
+
+ <title>Selection targets</title>
+
+ <para>The precise meaning of the selection targets may be
+ dependent on which of the two interfaces they are used.</para>
+
+ <table pgwide="1" frame="none" id="v4l2-selection-targets-table">
+ <title>Selection target definitions</title>
+ <tgroup cols="5">
+ <colspec colname="c1" />
+ <colspec colname="c2" />
+ <colspec colname="c3" />
+ <colspec colname="c4" />
+ <colspec colname="c5" />
+ &cs-def;
+ <thead>
+ <row rowsep="1">
+ <entry align="left">Target name</entry>
+ <entry align="left">id</entry>
+ <entry align="left">Definition</entry>
+ <entry align="left">Valid for V4L2</entry>
+ <entry align="left">Valid for V4L2 subdev</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_SEL_TGT_CROP</constant></entry>
+ <entry>0x0000</entry>
+ <entry>Crop rectangle. Defines the cropped area.</entry>
+ <entry>Yes</entry>
+ <entry>Yes</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_SEL_TGT_CROP_DEFAULT</constant></entry>
+ <entry>0x0001</entry>
+ <entry>Suggested cropping rectangle that covers the "whole picture".</entry>
+ <entry>Yes</entry>
+ <entry>No</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_SEL_TGT_CROP_BOUNDS</constant></entry>
+ <entry>0x0002</entry>
+ <entry>Bounds of the crop rectangle. All valid crop
+ rectangles fit inside the crop bounds rectangle.
+ </entry>
+ <entry>Yes</entry>
+ <entry>Yes</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_SEL_TGT_NATIVE_SIZE</constant></entry>
+ <entry>0x0003</entry>
+ <entry>The native size of the device, e.g. a sensor's
+ pixel array. <structfield>left</structfield> and
+ <structfield>top</structfield> fields are zero for this
+ target. Setting the native size will generally only make
+ sense for memory to memory devices where the software can
+ create a canvas of a given size in which for example a
+ video frame can be composed. In that case
+ V4L2_SEL_TGT_NATIVE_SIZE can be used to configure the size
+ of that canvas.
+ </entry>
+ <entry>Yes</entry>
+ <entry>Yes</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_SEL_TGT_COMPOSE</constant></entry>
+ <entry>0x0100</entry>
+ <entry>Compose rectangle. Used to configure scaling
+ and composition.</entry>
+ <entry>Yes</entry>
+ <entry>Yes</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_SEL_TGT_COMPOSE_DEFAULT</constant></entry>
+ <entry>0x0101</entry>
+ <entry>Suggested composition rectangle that covers the "whole picture".</entry>
+ <entry>Yes</entry>
+ <entry>No</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_SEL_TGT_COMPOSE_BOUNDS</constant></entry>
+ <entry>0x0102</entry>
+ <entry>Bounds of the compose rectangle. All valid compose
+ rectangles fit inside the compose bounds rectangle.</entry>
+ <entry>Yes</entry>
+ <entry>Yes</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_SEL_TGT_COMPOSE_PADDED</constant></entry>
+ <entry>0x0103</entry>
+ <entry>The active area and all padding pixels that are inserted or
+ modified by hardware.</entry>
+ <entry>Yes</entry>
+ <entry>No</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ </section>
+
+ <section id="v4l2-selection-flags">
+
+ <title>Selection flags</title>
+
+ <table pgwide="1" frame="none" id="v4l2-selection-flags-table">
+ <title>Selection flag definitions</title>
+ <tgroup cols="5">
+ <colspec colname="c1" />
+ <colspec colname="c2" />
+ <colspec colname="c3" />
+ <colspec colname="c4" />
+ <colspec colname="c5" />
+ &cs-def;
+ <thead>
+ <row rowsep="1">
+ <entry align="left">Flag name</entry>
+ <entry align="left">id</entry>
+ <entry align="left">Definition</entry>
+ <entry align="left">Valid for V4L2</entry>
+ <entry align="left">Valid for V4L2 subdev</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_SEL_FLAG_GE</constant></entry>
+ <entry>(1 &lt;&lt; 0)</entry>
+ <entry>Suggest the driver it should choose greater or
+ equal rectangle (in size) than was requested. Albeit the
+ driver may choose a lesser size, it will only do so due to
+ hardware limitations. Without this flag (and
+ <constant>V4L2_SEL_FLAG_LE</constant>) the
+ behaviour is to choose the closest possible
+ rectangle.</entry>
+ <entry>Yes</entry>
+ <entry>Yes</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_SEL_FLAG_LE</constant></entry>
+ <entry>(1 &lt;&lt; 1)</entry>
+ <entry>Suggest the driver it
+ should choose lesser or equal rectangle (in size) than was
+ requested. Albeit the driver may choose a greater size, it
+ will only do so due to hardware limitations.</entry>
+ <entry>Yes</entry>
+ <entry>Yes</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_SEL_FLAG_KEEP_CONFIG</constant></entry>
+ <entry>(1 &lt;&lt; 2)</entry>
+ <entry>The configuration must not be propagated to any
+ further processing steps. If this flag is not given, the
+ configuration is propagated inside the subdevice to all
+ further processing steps.</entry>
+ <entry>No</entry>
+ <entry>Yes</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ </section>
+
+</section>
diff --git a/Documentation/DocBook/media/v4l/subdev-formats.xml b/Documentation/DocBook/media/v4l/subdev-formats.xml
new file mode 100644
index 000000000..2588ad781
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/subdev-formats.xml
@@ -0,0 +1,4038 @@
+<section id="v4l2-mbus-format">
+ <title>Media Bus Formats</title>
+
+ <table pgwide="1" frame="none" id="v4l2-mbus-framefmt">
+ <title>struct <structname>v4l2_mbus_framefmt</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>width</structfield></entry>
+ <entry>Image width, in pixels.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>height</structfield></entry>
+ <entry>Image height, in pixels.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>code</structfield></entry>
+ <entry>Format code, from &v4l2-mbus-pixelcode;.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>field</structfield></entry>
+ <entry>Field order, from &v4l2-field;. See
+ <xref linkend="field-order" /> for details.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>colorspace</structfield></entry>
+ <entry>Image colorspace, from &v4l2-colorspace;. See
+ <xref linkend="colorspaces" /> for details.</entry>
+ </row>
+ <row>
+ <entry>&v4l2-ycbcr-encoding;</entry>
+ <entry><structfield>ycbcr_enc</structfield></entry>
+ <entry>This information supplements the
+<structfield>colorspace</structfield> and must be set by the driver for
+capture streams and by the application for output streams,
+see <xref linkend="colorspaces" />.</entry>
+ </row>
+ <row>
+ <entry>&v4l2-quantization;</entry>
+ <entry><structfield>quantization</structfield></entry>
+ <entry>This information supplements the
+<structfield>colorspace</structfield> and must be set by the driver for
+capture streams and by the application for output streams,
+see <xref linkend="colorspaces" />.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved</structfield>[6]</entry>
+ <entry>Reserved for future extensions. Applications and drivers must
+ set the array to zero.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <section id="v4l2-mbus-pixelcode">
+ <title>Media Bus Pixel Codes</title>
+
+ <para>The media bus pixel codes describe image formats as flowing over
+ physical busses (both between separate physical components and inside SoC
+ devices). This should not be confused with the V4L2 pixel formats that
+ describe, using four character codes, image formats as stored in memory.
+ </para>
+
+ <para>While there is a relationship between image formats on busses and
+ image formats in memory (a raw Bayer image won't be magically converted to
+ JPEG just by storing it to memory), there is no one-to-one correspondance
+ between them.</para>
+
+ <section>
+ <title>Packed RGB Formats</title>
+
+ <para>Those formats transfer pixel data as red, green and blue components.
+ The format code is made of the following information.
+ <itemizedlist>
+ <listitem><para>The red, green and blue components order code, as encoded in a
+ pixel sample. Possible values are RGB and BGR.</para></listitem>
+ <listitem><para>The number of bits per component, for each component. The values
+ can be different for all components. Common values are 555 and 565.</para>
+ </listitem>
+ <listitem><para>The number of bus samples per pixel. Pixels that are wider than
+ the bus width must be transferred in multiple samples. Common values are
+ 1 and 2.</para></listitem>
+ <listitem><para>The bus width.</para></listitem>
+ <listitem><para>For formats where the total number of bits per pixel is smaller
+ than the number of bus samples per pixel times the bus width, a padding
+ value stating if the bytes are padded in their most high order bits
+ (PADHI) or low order bits (PADLO). A "C" prefix is used for component-wise
+ padding in the most high order bits (CPADHI) or low order bits (CPADLO)
+ of each separate component.</para></listitem>
+ <listitem><para>For formats where the number of bus samples per pixel is larger
+ than 1, an endianness value stating if the pixel is transferred MSB first
+ (BE) or LSB first (LE).</para></listitem>
+ </itemizedlist>
+ </para>
+
+ <para>For instance, a format where pixels are encoded as 5-bits red, 5-bits
+ green and 5-bit blue values padded on the high bit, transferred as 2 8-bit
+ samples per pixel with the most significant bits (padding, red and half of
+ the green value) transferred first will be named
+ <constant>MEDIA_BUS_FMT_RGB555_2X8_PADHI_BE</constant>.
+ </para>
+
+ <para>The following tables list existing packed RGB formats.</para>
+
+ <table pgwide="0" frame="none" id="v4l2-mbus-pixelcode-rgb">
+ <title>RGB formats</title>
+ <tgroup cols="27">
+ <colspec colname="id" align="left" />
+ <colspec colname="code" align="center"/>
+ <colspec colname="bit" />
+ <colspec colnum="4" colname="b31" align="center" />
+ <colspec colnum="5" colname="b20" align="center" />
+ <colspec colnum="6" colname="b29" align="center" />
+ <colspec colnum="7" colname="b28" align="center" />
+ <colspec colnum="8" colname="b27" align="center" />
+ <colspec colnum="9" colname="b26" align="center" />
+ <colspec colnum="10" colname="b25" align="center" />
+ <colspec colnum="11" colname="b24" align="center" />
+ <colspec colnum="12" colname="b23" align="center" />
+ <colspec colnum="13" colname="b22" align="center" />
+ <colspec colnum="14" colname="b21" align="center" />
+ <colspec colnum="15" colname="b20" align="center" />
+ <colspec colnum="16" colname="b19" align="center" />
+ <colspec colnum="17" colname="b18" align="center" />
+ <colspec colnum="18" colname="b17" align="center" />
+ <colspec colnum="19" colname="b16" align="center" />
+ <colspec colnum="20" colname="b15" align="center" />
+ <colspec colnum="21" colname="b14" align="center" />
+ <colspec colnum="22" colname="b13" align="center" />
+ <colspec colnum="23" colname="b12" align="center" />
+ <colspec colnum="24" colname="b11" align="center" />
+ <colspec colnum="25" colname="b10" align="center" />
+ <colspec colnum="26" colname="b09" align="center" />
+ <colspec colnum="27" colname="b08" align="center" />
+ <colspec colnum="28" colname="b07" align="center" />
+ <colspec colnum="29" colname="b06" align="center" />
+ <colspec colnum="30" colname="b05" align="center" />
+ <colspec colnum="31" colname="b04" align="center" />
+ <colspec colnum="32" colname="b03" align="center" />
+ <colspec colnum="33" colname="b02" align="center" />
+ <colspec colnum="34" colname="b01" align="center" />
+ <colspec colnum="35" colname="b00" align="center" />
+ <spanspec namest="b31" nameend="b00" spanname="b0" />
+ <thead>
+ <row>
+ <entry>Identifier</entry>
+ <entry>Code</entry>
+ <entry></entry>
+ <entry spanname="b0">Data organization</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry>Bit</entry>
+ <entry>31</entry>
+ <entry>30</entry>
+ <entry>29</entry>
+ <entry>28</entry>
+ <entry>27</entry>
+ <entry>26</entry>
+ <entry>25</entry>
+ <entry>24</entry>
+ <entry>23</entry>
+ <entry>22</entry>
+ <entry>21</entry>
+ <entry>20</entry>
+ <entry>19</entry>
+ <entry>18</entry>
+ <entry>17</entry>
+ <entry>16</entry>
+ <entry>15</entry>
+ <entry>14</entry>
+ <entry>13</entry>
+ <entry>12</entry>
+ <entry>11</entry>
+ <entry>10</entry>
+ <entry>9</entry>
+ <entry>8</entry>
+ <entry>7</entry>
+ <entry>6</entry>
+ <entry>5</entry>
+ <entry>4</entry>
+ <entry>3</entry>
+ <entry>2</entry>
+ <entry>1</entry>
+ <entry>0</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row id="MEDIA-BUS-FMT-RGB444-1X12">
+ <entry>MEDIA_BUS_FMT_RGB444_1X12</entry>
+ <entry>0x1016</entry>
+ <entry></entry>
+ &dash-ent-20;
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-RGB444-2X8-PADHI-BE">
+ <entry>MEDIA_BUS_FMT_RGB444_2X8_PADHI_BE</entry>
+ <entry>0x1001</entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>0</entry>
+ <entry>0</entry>
+ <entry>0</entry>
+ <entry>0</entry>
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>g<subscript>3</subscript></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-RGB444-2X8-PADHI-LE">
+ <entry>MEDIA_BUS_FMT_RGB444_2X8_PADHI_LE</entry>
+ <entry>0x1002</entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>g<subscript>3</subscript></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>0</entry>
+ <entry>0</entry>
+ <entry>0</entry>
+ <entry>0</entry>
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-RGB555-2X8-PADHI-BE">
+ <entry>MEDIA_BUS_FMT_RGB555_2X8_PADHI_BE</entry>
+ <entry>0x1003</entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>0</entry>
+ <entry>r<subscript>4</subscript></entry>
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ <entry>b<subscript>4</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-RGB555-2X8-PADHI-LE">
+ <entry>MEDIA_BUS_FMT_RGB555_2X8_PADHI_LE</entry>
+ <entry>0x1004</entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ <entry>b<subscript>4</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>0</entry>
+ <entry>r<subscript>4</subscript></entry>
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-RGB565-1X16">
+ <entry>MEDIA_BUS_FMT_RGB565_1X16</entry>
+ <entry>0x1017</entry>
+ <entry></entry>
+ &dash-ent-16;
+ <entry>r<subscript>4</subscript></entry>
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ <entry>g<subscript>5</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ <entry>b<subscript>4</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-BGR565-2X8-BE">
+ <entry>MEDIA_BUS_FMT_BGR565_2X8_BE</entry>
+ <entry>0x1005</entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>b<subscript>4</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ <entry>g<subscript>5</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ <entry>r<subscript>4</subscript></entry>
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-BGR565-2X8-LE">
+ <entry>MEDIA_BUS_FMT_BGR565_2X8_LE</entry>
+ <entry>0x1006</entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ <entry>r<subscript>4</subscript></entry>
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>b<subscript>4</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ <entry>g<subscript>5</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-RGB565-2X8-BE">
+ <entry>MEDIA_BUS_FMT_RGB565_2X8_BE</entry>
+ <entry>0x1007</entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>r<subscript>4</subscript></entry>
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ <entry>g<subscript>5</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ <entry>b<subscript>4</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-RGB565-2X8-LE">
+ <entry>MEDIA_BUS_FMT_RGB565_2X8_LE</entry>
+ <entry>0x1008</entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ <entry>b<subscript>4</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>r<subscript>4</subscript></entry>
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ <entry>g<subscript>5</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-RGB666-1X18">
+ <entry>MEDIA_BUS_FMT_RGB666_1X18</entry>
+ <entry>0x1009</entry>
+ <entry></entry>
+ &dash-ent-14;
+ <entry>r<subscript>5</subscript></entry>
+ <entry>r<subscript>4</subscript></entry>
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ <entry>g<subscript>5</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ <entry>b<subscript>5</subscript></entry>
+ <entry>b<subscript>4</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-RBG888-1X24">
+ <entry>MEDIA_BUS_FMT_RBG888_1X24</entry>
+ <entry>0x100e</entry>
+ <entry></entry>
+ &dash-ent-8;
+ <entry>r<subscript>7</subscript></entry>
+ <entry>r<subscript>6</subscript></entry>
+ <entry>r<subscript>5</subscript></entry>
+ <entry>r<subscript>4</subscript></entry>
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ <entry>b<subscript>7</subscript></entry>
+ <entry>b<subscript>6</subscript></entry>
+ <entry>b<subscript>5</subscript></entry>
+ <entry>b<subscript>4</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ <entry>g<subscript>7</subscript></entry>
+ <entry>g<subscript>6</subscript></entry>
+ <entry>g<subscript>5</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-RGB666-1X24_CPADHI">
+ <entry>MEDIA_BUS_FMT_RGB666_1X24_CPADHI</entry>
+ <entry>0x1015</entry>
+ <entry></entry>
+ &dash-ent-8;
+ <entry>0</entry>
+ <entry>0</entry>
+ <entry>r<subscript>5</subscript></entry>
+ <entry>r<subscript>4</subscript></entry>
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ <entry>0</entry>
+ <entry>0</entry>
+ <entry>g<subscript>5</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ <entry>0</entry>
+ <entry>0</entry>
+ <entry>b<subscript>5</subscript></entry>
+ <entry>b<subscript>4</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-BGR888-1X24">
+ <entry>MEDIA_BUS_FMT_BGR888_1X24</entry>
+ <entry>0x1013</entry>
+ <entry></entry>
+ &dash-ent-8;
+ <entry>b<subscript>7</subscript></entry>
+ <entry>b<subscript>6</subscript></entry>
+ <entry>b<subscript>5</subscript></entry>
+ <entry>b<subscript>4</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ <entry>g<subscript>7</subscript></entry>
+ <entry>g<subscript>6</subscript></entry>
+ <entry>g<subscript>5</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ <entry>r<subscript>7</subscript></entry>
+ <entry>r<subscript>6</subscript></entry>
+ <entry>r<subscript>5</subscript></entry>
+ <entry>r<subscript>4</subscript></entry>
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-GBR888-1X24">
+ <entry>MEDIA_BUS_FMT_GBR888_1X24</entry>
+ <entry>0x1014</entry>
+ <entry></entry>
+ &dash-ent-8;
+ <entry>g<subscript>7</subscript></entry>
+ <entry>g<subscript>6</subscript></entry>
+ <entry>g<subscript>5</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ <entry>b<subscript>7</subscript></entry>
+ <entry>b<subscript>6</subscript></entry>
+ <entry>b<subscript>5</subscript></entry>
+ <entry>b<subscript>4</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ <entry>r<subscript>7</subscript></entry>
+ <entry>r<subscript>6</subscript></entry>
+ <entry>r<subscript>5</subscript></entry>
+ <entry>r<subscript>4</subscript></entry>
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-RGB888-1X24">
+ <entry>MEDIA_BUS_FMT_RGB888_1X24</entry>
+ <entry>0x100a</entry>
+ <entry></entry>
+ &dash-ent-8;
+ <entry>r<subscript>7</subscript></entry>
+ <entry>r<subscript>6</subscript></entry>
+ <entry>r<subscript>5</subscript></entry>
+ <entry>r<subscript>4</subscript></entry>
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ <entry>g<subscript>7</subscript></entry>
+ <entry>g<subscript>6</subscript></entry>
+ <entry>g<subscript>5</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ <entry>b<subscript>7</subscript></entry>
+ <entry>b<subscript>6</subscript></entry>
+ <entry>b<subscript>5</subscript></entry>
+ <entry>b<subscript>4</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-RGB888-2X12-BE">
+ <entry>MEDIA_BUS_FMT_RGB888_2X12_BE</entry>
+ <entry>0x100b</entry>
+ <entry></entry>
+ &dash-ent-20;
+ <entry>r<subscript>7</subscript></entry>
+ <entry>r<subscript>6</subscript></entry>
+ <entry>r<subscript>5</subscript></entry>
+ <entry>r<subscript>4</subscript></entry>
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ <entry>g<subscript>7</subscript></entry>
+ <entry>g<subscript>6</subscript></entry>
+ <entry>g<subscript>5</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-20;
+ <entry>g<subscript>3</subscript></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ <entry>b<subscript>7</subscript></entry>
+ <entry>b<subscript>6</subscript></entry>
+ <entry>b<subscript>5</subscript></entry>
+ <entry>b<subscript>4</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-RGB888-2X12-LE">
+ <entry>MEDIA_BUS_FMT_RGB888_2X12_LE</entry>
+ <entry>0x100c</entry>
+ <entry></entry>
+ &dash-ent-20;
+ <entry>g<subscript>3</subscript></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ <entry>b<subscript>7</subscript></entry>
+ <entry>b<subscript>6</subscript></entry>
+ <entry>b<subscript>5</subscript></entry>
+ <entry>b<subscript>4</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-20;
+ <entry>r<subscript>7</subscript></entry>
+ <entry>r<subscript>6</subscript></entry>
+ <entry>r<subscript>5</subscript></entry>
+ <entry>r<subscript>4</subscript></entry>
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ <entry>g<subscript>7</subscript></entry>
+ <entry>g<subscript>6</subscript></entry>
+ <entry>g<subscript>5</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-ARGB888-1X32">
+ <entry>MEDIA_BUS_FMT_ARGB888_1X32</entry>
+ <entry>0x100d</entry>
+ <entry></entry>
+ <entry>a<subscript>7</subscript></entry>
+ <entry>a<subscript>6</subscript></entry>
+ <entry>a<subscript>5</subscript></entry>
+ <entry>a<subscript>4</subscript></entry>
+ <entry>a<subscript>3</subscript></entry>
+ <entry>a<subscript>2</subscript></entry>
+ <entry>a<subscript>1</subscript></entry>
+ <entry>a<subscript>0</subscript></entry>
+ <entry>r<subscript>7</subscript></entry>
+ <entry>r<subscript>6</subscript></entry>
+ <entry>r<subscript>5</subscript></entry>
+ <entry>r<subscript>4</subscript></entry>
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ <entry>g<subscript>7</subscript></entry>
+ <entry>g<subscript>6</subscript></entry>
+ <entry>g<subscript>5</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ <entry>b<subscript>7</subscript></entry>
+ <entry>b<subscript>6</subscript></entry>
+ <entry>b<subscript>5</subscript></entry>
+ <entry>b<subscript>4</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-RGB888-1X32-PADHI">
+ <entry>MEDIA_BUS_FMT_RGB888_1X32_PADHI</entry>
+ <entry>0x100f</entry>
+ <entry></entry>
+ <entry>0</entry>
+ <entry>0</entry>
+ <entry>0</entry>
+ <entry>0</entry>
+ <entry>0</entry>
+ <entry>0</entry>
+ <entry>0</entry>
+ <entry>0</entry>
+ <entry>r<subscript>7</subscript></entry>
+ <entry>r<subscript>6</subscript></entry>
+ <entry>r<subscript>5</subscript></entry>
+ <entry>r<subscript>4</subscript></entry>
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ <entry>g<subscript>7</subscript></entry>
+ <entry>g<subscript>6</subscript></entry>
+ <entry>g<subscript>5</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ <entry>b<subscript>7</subscript></entry>
+ <entry>b<subscript>6</subscript></entry>
+ <entry>b<subscript>5</subscript></entry>
+ <entry>b<subscript>4</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <para>On LVDS buses, usually each sample is transferred serialized in
+ seven time slots per pixel clock, on three (18-bit) or four (24-bit)
+ differential data pairs at the same time. The remaining bits are used for
+ control signals as defined by SPWG/PSWG/VESA or JEIDA standards.
+ The 24-bit RGB format serialized in seven time slots on four lanes using
+ JEIDA defined bit mapping will be named
+ <constant>MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA</constant>, for example.
+ </para>
+
+ <table pgwide="0" frame="none" id="v4l2-mbus-pixelcode-rgb-lvds">
+ <title>LVDS RGB formats</title>
+ <tgroup cols="8">
+ <colspec colname="id" align="left" />
+ <colspec colname="code" align="center" />
+ <colspec colname="slot" align="center" />
+ <colspec colname="lane" />
+ <colspec colnum="5" colname="l03" align="center" />
+ <colspec colnum="6" colname="l02" align="center" />
+ <colspec colnum="7" colname="l01" align="center" />
+ <colspec colnum="8" colname="l00" align="center" />
+ <spanspec namest="l03" nameend="l00" spanname="l0" />
+ <thead>
+ <row>
+ <entry>Identifier</entry>
+ <entry>Code</entry>
+ <entry></entry>
+ <entry></entry>
+ <entry spanname="l0">Data organization</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry>Timeslot</entry>
+ <entry>Lane</entry>
+ <entry>3</entry>
+ <entry>2</entry>
+ <entry>1</entry>
+ <entry>0</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row id="MEDIA-BUS-FMT-RGB666-1X7X3-SPWG">
+ <entry>MEDIA_BUS_FMT_RGB666_1X7X3_SPWG</entry>
+ <entry>0x1010</entry>
+ <entry>0</entry>
+ <entry></entry>
+ <entry>-</entry>
+ <entry>d</entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry>1</entry>
+ <entry></entry>
+ <entry>-</entry>
+ <entry>d</entry>
+ <entry>b<subscript>0</subscript></entry>
+ <entry>r<subscript>5</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry>2</entry>
+ <entry></entry>
+ <entry>-</entry>
+ <entry>d</entry>
+ <entry>g<subscript>5</subscript></entry>
+ <entry>r<subscript>4</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry>3</entry>
+ <entry></entry>
+ <entry>-</entry>
+ <entry>b<subscript>5</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry>r<subscript>3</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry>4</entry>
+ <entry></entry>
+ <entry>-</entry>
+ <entry>b<subscript>4</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry>5</entry>
+ <entry></entry>
+ <entry>-</entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry>6</entry>
+ <entry></entry>
+ <entry>-</entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-RGB888-1X7X4-SPWG">
+ <entry>MEDIA_BUS_FMT_RGB888_1X7X4_SPWG</entry>
+ <entry>0x1011</entry>
+ <entry>0</entry>
+ <entry></entry>
+ <entry>d</entry>
+ <entry>d</entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry>1</entry>
+ <entry></entry>
+ <entry>b<subscript>7</subscript></entry>
+ <entry>d</entry>
+ <entry>b<subscript>0</subscript></entry>
+ <entry>r<subscript>5</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry>2</entry>
+ <entry></entry>
+ <entry>b<subscript>6</subscript></entry>
+ <entry>d</entry>
+ <entry>g<subscript>5</subscript></entry>
+ <entry>r<subscript>4</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry>3</entry>
+ <entry></entry>
+ <entry>g<subscript>7</subscript></entry>
+ <entry>b<subscript>5</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry>r<subscript>3</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry>4</entry>
+ <entry></entry>
+ <entry>g<subscript>6</subscript></entry>
+ <entry>b<subscript>4</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry>5</entry>
+ <entry></entry>
+ <entry>r<subscript>7</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry>6</entry>
+ <entry></entry>
+ <entry>r<subscript>6</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-RGB888-1X7X4-JEIDA">
+ <entry>MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA</entry>
+ <entry>0x1012</entry>
+ <entry>0</entry>
+ <entry></entry>
+ <entry>d</entry>
+ <entry>d</entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>g<subscript>2</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry>1</entry>
+ <entry></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>d</entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>r<subscript>7</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry>2</entry>
+ <entry></entry>
+ <entry>b<subscript>0</subscript></entry>
+ <entry>d</entry>
+ <entry>g<subscript>7</subscript></entry>
+ <entry>r<subscript>6</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry>3</entry>
+ <entry></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>b<subscript>7</subscript></entry>
+ <entry>g<subscript>6</subscript></entry>
+ <entry>r<subscript>5</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry>4</entry>
+ <entry></entry>
+ <entry>g<subscript>0</subscript></entry>
+ <entry>b<subscript>6</subscript></entry>
+ <entry>g<subscript>5</subscript></entry>
+ <entry>r<subscript>4</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry>5</entry>
+ <entry></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>b<subscript>5</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry>r<subscript>3</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry>6</entry>
+ <entry></entry>
+ <entry>r<subscript>0</subscript></entry>
+ <entry>b<subscript>4</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </section>
+
+ <section>
+ <title>Bayer Formats</title>
+
+ <para>Those formats transfer pixel data as red, green and blue components.
+ The format code is made of the following information.
+ <itemizedlist>
+ <listitem><para>The red, green and blue components order code, as encoded in a
+ pixel sample. The possible values are shown in <xref
+ linkend="bayer-patterns" />.</para></listitem>
+ <listitem><para>The number of bits per pixel component. All components are
+ transferred on the same number of bits. Common values are 8, 10 and 12.</para>
+ </listitem>
+ <listitem><para>The compression (optional). If the pixel components are
+ ALAW- or DPCM-compressed, a mention of the compression scheme and the
+ number of bits per compressed pixel component.</para></listitem>
+ <listitem><para>The number of bus samples per pixel. Pixels that are wider than
+ the bus width must be transferred in multiple samples. Common values are
+ 1 and 2.</para></listitem>
+ <listitem><para>The bus width.</para></listitem>
+ <listitem><para>For formats where the total number of bits per pixel is smaller
+ than the number of bus samples per pixel times the bus width, a padding
+ value stating if the bytes are padded in their most high order bits
+ (PADHI) or low order bits (PADLO).</para></listitem>
+ <listitem><para>For formats where the number of bus samples per pixel is larger
+ than 1, an endianness value stating if the pixel is transferred MSB first
+ (BE) or LSB first (LE).</para></listitem>
+ </itemizedlist>
+ </para>
+
+ <para>For instance, a format with uncompressed 10-bit Bayer components
+ arranged in a red, green, green, blue pattern transferred as 2 8-bit
+ samples per pixel with the least significant bits transferred first will
+ be named <constant>MEDIA_BUS_FMT_SRGGB10_2X8_PADHI_LE</constant>.
+ </para>
+
+ <figure id="bayer-patterns">
+ <title>Bayer Patterns</title>
+ <mediaobject>
+ <imageobject>
+ <imagedata fileref="bayer.png" format="PNG" />
+ </imageobject>
+ <textobject>
+ <phrase>Bayer filter color patterns</phrase>
+ </textobject>
+ </mediaobject>
+ </figure>
+
+ <para>The following table lists existing packed Bayer formats. The data
+ organization is given as an example for the first pixel only.</para>
+
+ <table pgwide="0" frame="none" id="v4l2-mbus-pixelcode-bayer">
+ <title>Bayer Formats</title>
+ <tgroup cols="15">
+ <colspec colname="id" align="left" />
+ <colspec colname="code" align="center"/>
+ <colspec colname="bit" />
+ <colspec colnum="4" colname="b11" align="center" />
+ <colspec colnum="5" colname="b10" align="center" />
+ <colspec colnum="6" colname="b09" align="center" />
+ <colspec colnum="7" colname="b08" align="center" />
+ <colspec colnum="8" colname="b07" align="center" />
+ <colspec colnum="9" colname="b06" align="center" />
+ <colspec colnum="10" colname="b05" align="center" />
+ <colspec colnum="11" colname="b04" align="center" />
+ <colspec colnum="12" colname="b03" align="center" />
+ <colspec colnum="13" colname="b02" align="center" />
+ <colspec colnum="14" colname="b01" align="center" />
+ <colspec colnum="15" colname="b00" align="center" />
+ <spanspec namest="b11" nameend="b00" spanname="b0" />
+ <thead>
+ <row>
+ <entry>Identifier</entry>
+ <entry>Code</entry>
+ <entry></entry>
+ <entry spanname="b0">Data organization</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry>Bit</entry>
+ <entry>11</entry>
+ <entry>10</entry>
+ <entry>9</entry>
+ <entry>8</entry>
+ <entry>7</entry>
+ <entry>6</entry>
+ <entry>5</entry>
+ <entry>4</entry>
+ <entry>3</entry>
+ <entry>2</entry>
+ <entry>1</entry>
+ <entry>0</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row id="MEDIA-BUS-FMT-SBGGR8-1X8">
+ <entry>MEDIA_BUS_FMT_SBGGR8_1X8</entry>
+ <entry>0x3001</entry>
+ <entry></entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>b<subscript>7</subscript></entry>
+ <entry>b<subscript>6</subscript></entry>
+ <entry>b<subscript>5</subscript></entry>
+ <entry>b<subscript>4</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-SGBRG8-1X8">
+ <entry>MEDIA_BUS_FMT_SGBRG8_1X8</entry>
+ <entry>0x3013</entry>
+ <entry></entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>g<subscript>7</subscript></entry>
+ <entry>g<subscript>6</subscript></entry>
+ <entry>g<subscript>5</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-SGRBG8-1X8">
+ <entry>MEDIA_BUS_FMT_SGRBG8_1X8</entry>
+ <entry>0x3002</entry>
+ <entry></entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>g<subscript>7</subscript></entry>
+ <entry>g<subscript>6</subscript></entry>
+ <entry>g<subscript>5</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-SRGGB8-1X8">
+ <entry>MEDIA_BUS_FMT_SRGGB8_1X8</entry>
+ <entry>0x3014</entry>
+ <entry></entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>r<subscript>7</subscript></entry>
+ <entry>r<subscript>6</subscript></entry>
+ <entry>r<subscript>5</subscript></entry>
+ <entry>r<subscript>4</subscript></entry>
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-SBGGR10-ALAW8-1X8">
+ <entry>MEDIA_BUS_FMT_SBGGR10_ALAW8_1X8</entry>
+ <entry>0x3015</entry>
+ <entry></entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>b<subscript>7</subscript></entry>
+ <entry>b<subscript>6</subscript></entry>
+ <entry>b<subscript>5</subscript></entry>
+ <entry>b<subscript>4</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-SGBRG10-ALAW8-1X8">
+ <entry>MEDIA_BUS_FMT_SGBRG10_ALAW8_1X8</entry>
+ <entry>0x3016</entry>
+ <entry></entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>g<subscript>7</subscript></entry>
+ <entry>g<subscript>6</subscript></entry>
+ <entry>g<subscript>5</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-SGRBG10-ALAW8-1X8">
+ <entry>MEDIA_BUS_FMT_SGRBG10_ALAW8_1X8</entry>
+ <entry>0x3017</entry>
+ <entry></entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>g<subscript>7</subscript></entry>
+ <entry>g<subscript>6</subscript></entry>
+ <entry>g<subscript>5</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-SRGGB10-ALAW8-1X8">
+ <entry>MEDIA_BUS_FMT_SRGGB10_ALAW8_1X8</entry>
+ <entry>0x3018</entry>
+ <entry></entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>r<subscript>7</subscript></entry>
+ <entry>r<subscript>6</subscript></entry>
+ <entry>r<subscript>5</subscript></entry>
+ <entry>r<subscript>4</subscript></entry>
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-SBGGR10-DPCM8-1X8">
+ <entry>MEDIA_BUS_FMT_SBGGR10_DPCM8_1X8</entry>
+ <entry>0x300b</entry>
+ <entry></entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>b<subscript>7</subscript></entry>
+ <entry>b<subscript>6</subscript></entry>
+ <entry>b<subscript>5</subscript></entry>
+ <entry>b<subscript>4</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-SGBRG10-DPCM8-1X8">
+ <entry>MEDIA_BUS_FMT_SGBRG10_DPCM8_1X8</entry>
+ <entry>0x300c</entry>
+ <entry></entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>g<subscript>7</subscript></entry>
+ <entry>g<subscript>6</subscript></entry>
+ <entry>g<subscript>5</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-SGRBG10-DPCM8-1X8">
+ <entry>MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8</entry>
+ <entry>0x3009</entry>
+ <entry></entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>g<subscript>7</subscript></entry>
+ <entry>g<subscript>6</subscript></entry>
+ <entry>g<subscript>5</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-SRGGB10-DPCM8-1X8">
+ <entry>MEDIA_BUS_FMT_SRGGB10_DPCM8_1X8</entry>
+ <entry>0x300d</entry>
+ <entry></entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>r<subscript>7</subscript></entry>
+ <entry>r<subscript>6</subscript></entry>
+ <entry>r<subscript>5</subscript></entry>
+ <entry>r<subscript>4</subscript></entry>
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-SBGGR10-2X8-PADHI-BE">
+ <entry>MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_BE</entry>
+ <entry>0x3003</entry>
+ <entry></entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>0</entry>
+ <entry>0</entry>
+ <entry>0</entry>
+ <entry>0</entry>
+ <entry>0</entry>
+ <entry>0</entry>
+ <entry>b<subscript>9</subscript></entry>
+ <entry>b<subscript>8</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>b<subscript>7</subscript></entry>
+ <entry>b<subscript>6</subscript></entry>
+ <entry>b<subscript>5</subscript></entry>
+ <entry>b<subscript>4</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-SBGGR10-2X8-PADHI-LE">
+ <entry>MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_LE</entry>
+ <entry>0x3004</entry>
+ <entry></entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>b<subscript>7</subscript></entry>
+ <entry>b<subscript>6</subscript></entry>
+ <entry>b<subscript>5</subscript></entry>
+ <entry>b<subscript>4</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>0</entry>
+ <entry>0</entry>
+ <entry>0</entry>
+ <entry>0</entry>
+ <entry>0</entry>
+ <entry>0</entry>
+ <entry>b<subscript>9</subscript></entry>
+ <entry>b<subscript>8</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-SBGGR10-2X8-PADLO-BE">
+ <entry>MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_BE</entry>
+ <entry>0x3005</entry>
+ <entry></entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>b<subscript>9</subscript></entry>
+ <entry>b<subscript>8</subscript></entry>
+ <entry>b<subscript>7</subscript></entry>
+ <entry>b<subscript>6</subscript></entry>
+ <entry>b<subscript>5</subscript></entry>
+ <entry>b<subscript>4</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ <entry>0</entry>
+ <entry>0</entry>
+ <entry>0</entry>
+ <entry>0</entry>
+ <entry>0</entry>
+ <entry>0</entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-SBGGR10-2X8-PADLO-LE">
+ <entry>MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_LE</entry>
+ <entry>0x3006</entry>
+ <entry></entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ <entry>0</entry>
+ <entry>0</entry>
+ <entry>0</entry>
+ <entry>0</entry>
+ <entry>0</entry>
+ <entry>0</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>b<subscript>9</subscript></entry>
+ <entry>b<subscript>8</subscript></entry>
+ <entry>b<subscript>7</subscript></entry>
+ <entry>b<subscript>6</subscript></entry>
+ <entry>b<subscript>5</subscript></entry>
+ <entry>b<subscript>4</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-SBGGR10-1X10">
+ <entry>MEDIA_BUS_FMT_SBGGR10_1X10</entry>
+ <entry>0x3007</entry>
+ <entry></entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>b<subscript>9</subscript></entry>
+ <entry>b<subscript>8</subscript></entry>
+ <entry>b<subscript>7</subscript></entry>
+ <entry>b<subscript>6</subscript></entry>
+ <entry>b<subscript>5</subscript></entry>
+ <entry>b<subscript>4</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-SGBRG10-1X10">
+ <entry>MEDIA_BUS_FMT_SGBRG10_1X10</entry>
+ <entry>0x300e</entry>
+ <entry></entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>g<subscript>9</subscript></entry>
+ <entry>g<subscript>8</subscript></entry>
+ <entry>g<subscript>7</subscript></entry>
+ <entry>g<subscript>6</subscript></entry>
+ <entry>g<subscript>5</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-SGRBG10-1X10">
+ <entry>MEDIA_BUS_FMT_SGRBG10_1X10</entry>
+ <entry>0x300a</entry>
+ <entry></entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>g<subscript>9</subscript></entry>
+ <entry>g<subscript>8</subscript></entry>
+ <entry>g<subscript>7</subscript></entry>
+ <entry>g<subscript>6</subscript></entry>
+ <entry>g<subscript>5</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-SRGGB10-1X10">
+ <entry>MEDIA_BUS_FMT_SRGGB10_1X10</entry>
+ <entry>0x300f</entry>
+ <entry></entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>r<subscript>9</subscript></entry>
+ <entry>r<subscript>8</subscript></entry>
+ <entry>r<subscript>7</subscript></entry>
+ <entry>r<subscript>6</subscript></entry>
+ <entry>r<subscript>5</subscript></entry>
+ <entry>r<subscript>4</subscript></entry>
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-SBGGR12-1X12">
+ <entry>MEDIA_BUS_FMT_SBGGR12_1X12</entry>
+ <entry>0x3008</entry>
+ <entry></entry>
+ <entry>b<subscript>11</subscript></entry>
+ <entry>b<subscript>10</subscript></entry>
+ <entry>b<subscript>9</subscript></entry>
+ <entry>b<subscript>8</subscript></entry>
+ <entry>b<subscript>7</subscript></entry>
+ <entry>b<subscript>6</subscript></entry>
+ <entry>b<subscript>5</subscript></entry>
+ <entry>b<subscript>4</subscript></entry>
+ <entry>b<subscript>3</subscript></entry>
+ <entry>b<subscript>2</subscript></entry>
+ <entry>b<subscript>1</subscript></entry>
+ <entry>b<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-SGBRG12-1X12">
+ <entry>MEDIA_BUS_FMT_SGBRG12_1X12</entry>
+ <entry>0x3010</entry>
+ <entry></entry>
+ <entry>g<subscript>11</subscript></entry>
+ <entry>g<subscript>10</subscript></entry>
+ <entry>g<subscript>9</subscript></entry>
+ <entry>g<subscript>8</subscript></entry>
+ <entry>g<subscript>7</subscript></entry>
+ <entry>g<subscript>6</subscript></entry>
+ <entry>g<subscript>5</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-SGRBG12-1X12">
+ <entry>MEDIA_BUS_FMT_SGRBG12_1X12</entry>
+ <entry>0x3011</entry>
+ <entry></entry>
+ <entry>g<subscript>11</subscript></entry>
+ <entry>g<subscript>10</subscript></entry>
+ <entry>g<subscript>9</subscript></entry>
+ <entry>g<subscript>8</subscript></entry>
+ <entry>g<subscript>7</subscript></entry>
+ <entry>g<subscript>6</subscript></entry>
+ <entry>g<subscript>5</subscript></entry>
+ <entry>g<subscript>4</subscript></entry>
+ <entry>g<subscript>3</subscript></entry>
+ <entry>g<subscript>2</subscript></entry>
+ <entry>g<subscript>1</subscript></entry>
+ <entry>g<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-SRGGB12-1X12">
+ <entry>MEDIA_BUS_FMT_SRGGB12_1X12</entry>
+ <entry>0x3012</entry>
+ <entry></entry>
+ <entry>r<subscript>11</subscript></entry>
+ <entry>r<subscript>10</subscript></entry>
+ <entry>r<subscript>9</subscript></entry>
+ <entry>r<subscript>8</subscript></entry>
+ <entry>r<subscript>7</subscript></entry>
+ <entry>r<subscript>6</subscript></entry>
+ <entry>r<subscript>5</subscript></entry>
+ <entry>r<subscript>4</subscript></entry>
+ <entry>r<subscript>3</subscript></entry>
+ <entry>r<subscript>2</subscript></entry>
+ <entry>r<subscript>1</subscript></entry>
+ <entry>r<subscript>0</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </section>
+
+ <section>
+ <title>Packed YUV Formats</title>
+
+ <para>Those data formats transfer pixel data as (possibly downsampled) Y, U
+ and V components. Some formats include dummy bits in some of their samples
+ and are collectively referred to as "YDYC" (Y-Dummy-Y-Chroma) formats.
+ One cannot rely on the values of these dummy bits as those are undefined.
+ </para>
+ <para>The format code is made of the following information.
+ <itemizedlist>
+ <listitem><para>The Y, U and V components order code, as transferred on the
+ bus. Possible values are YUYV, UYVY, YVYU and VYUY for formats with no
+ dummy bit, and YDYUYDYV, YDYVYDYU, YUYDYVYD and YVYDYUYD for YDYC formats.
+ </para></listitem>
+ <listitem><para>The number of bits per pixel component. All components are
+ transferred on the same number of bits. Common values are 8, 10 and 12.</para>
+ </listitem>
+ <listitem><para>The number of bus samples per pixel. Pixels that are wider than
+ the bus width must be transferred in multiple samples. Common values are
+ 1, 1.5 (encoded as 1_5) and 2.</para></listitem>
+ <listitem><para>The bus width. When the bus width is larger than the number of
+ bits per pixel component, several components are packed in a single bus
+ sample. The components are ordered as specified by the order code, with
+ components on the left of the code transferred in the high order bits.
+ Common values are 8 and 16.</para>
+ </listitem>
+ </itemizedlist>
+ </para>
+
+ <para>For instance, a format where pixels are encoded as 8-bit YUV values
+ downsampled to 4:2:2 and transferred as 2 8-bit bus samples per pixel in the
+ U, Y, V, Y order will be named <constant>MEDIA_BUS_FMT_UYVY8_2X8</constant>.
+ </para>
+
+ <para><xref linkend="v4l2-mbus-pixelcode-yuv8"/> lists existing packed YUV
+ formats and describes the organization of each pixel data in each sample.
+ When a format pattern is split across multiple samples each of the samples
+ in the pattern is described.</para>
+
+ <para>The role of each bit transferred over the bus is identified by one
+ of the following codes.</para>
+
+ <itemizedlist>
+ <listitem><para>y<subscript>x</subscript> for luma component bit number x</para></listitem>
+ <listitem><para>u<subscript>x</subscript> for blue chroma component bit number x</para></listitem>
+ <listitem><para>v<subscript>x</subscript> for red chroma component bit number x</para></listitem>
+ <listitem><para>a<subscript>x</subscript> for alpha component bit number x</para></listitem>
+ <listitem><para>- for non-available bits (for positions higher than the bus width)</para></listitem>
+ <listitem><para>d for dummy bits</para></listitem>
+ </itemizedlist>
+
+ <table pgwide="0" frame="none" id="v4l2-mbus-pixelcode-yuv8">
+ <title>YUV Formats</title>
+ <tgroup cols="23">
+ <colspec colname="id" align="left" />
+ <colspec colname="code" align="center"/>
+ <colspec colname="bit" />
+ <colspec colnum="4" colname="b31" align="center" />
+ <colspec colnum="5" colname="b20" align="center" />
+ <colspec colnum="6" colname="b29" align="center" />
+ <colspec colnum="7" colname="b28" align="center" />
+ <colspec colnum="8" colname="b27" align="center" />
+ <colspec colnum="9" colname="b26" align="center" />
+ <colspec colnum="10" colname="b25" align="center" />
+ <colspec colnum="11" colname="b24" align="center" />
+ <colspec colnum="12" colname="b23" align="center" />
+ <colspec colnum="13" colname="b22" align="center" />
+ <colspec colnum="14" colname="b21" align="center" />
+ <colspec colnum="15" colname="b20" align="center" />
+ <colspec colnum="16" colname="b19" align="center" />
+ <colspec colnum="17" colname="b18" align="center" />
+ <colspec colnum="18" colname="b17" align="center" />
+ <colspec colnum="19" colname="b16" align="center" />
+ <colspec colnum="20" colname="b15" align="center" />
+ <colspec colnum="21" colname="b14" align="center" />
+ <colspec colnum="22" colname="b13" align="center" />
+ <colspec colnum="23" colname="b12" align="center" />
+ <colspec colnum="24" colname="b11" align="center" />
+ <colspec colnum="25" colname="b10" align="center" />
+ <colspec colnum="26" colname="b09" align="center" />
+ <colspec colnum="27" colname="b08" align="center" />
+ <colspec colnum="28" colname="b07" align="center" />
+ <colspec colnum="29" colname="b06" align="center" />
+ <colspec colnum="30" colname="b05" align="center" />
+ <colspec colnum="31" colname="b04" align="center" />
+ <colspec colnum="32" colname="b03" align="center" />
+ <colspec colnum="33" colname="b02" align="center" />
+ <colspec colnum="34" colname="b01" align="center" />
+ <colspec colnum="35" colname="b00" align="center" />
+ <spanspec namest="b31" nameend="b00" spanname="b0" />
+ <thead>
+ <row>
+ <entry>Identifier</entry>
+ <entry>Code</entry>
+ <entry></entry>
+ <entry spanname="b0">Data organization</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry>Bit</entry>
+ <entry>31</entry>
+ <entry>30</entry>
+ <entry>29</entry>
+ <entry>28</entry>
+ <entry>27</entry>
+ <entry>26</entry>
+ <entry>25</entry>
+ <entry>24</entry>
+ <entry>23</entry>
+ <entry>22</entry>
+ <entry>21</entry>
+ <entry>10</entry>
+ <entry>19</entry>
+ <entry>18</entry>
+ <entry>17</entry>
+ <entry>16</entry>
+ <entry>15</entry>
+ <entry>14</entry>
+ <entry>13</entry>
+ <entry>12</entry>
+ <entry>11</entry>
+ <entry>10</entry>
+ <entry>9</entry>
+ <entry>8</entry>
+ <entry>7</entry>
+ <entry>6</entry>
+ <entry>5</entry>
+ <entry>4</entry>
+ <entry>3</entry>
+ <entry>2</entry>
+ <entry>1</entry>
+ <entry>0</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row id="MEDIA-BUS-FMT-Y8-1X8">
+ <entry>MEDIA_BUS_FMT_Y8_1X8</entry>
+ <entry>0x2001</entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-UV8-1X8">
+ <entry>MEDIA_BUS_FMT_UV8_1X8</entry>
+ <entry>0x2015</entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>u<subscript>7</subscript></entry>
+ <entry>u<subscript>6</subscript></entry>
+ <entry>u<subscript>5</subscript></entry>
+ <entry>u<subscript>4</subscript></entry>
+ <entry>u<subscript>3</subscript></entry>
+ <entry>u<subscript>2</subscript></entry>
+ <entry>u<subscript>1</subscript></entry>
+ <entry>u<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>v<subscript>7</subscript></entry>
+ <entry>v<subscript>6</subscript></entry>
+ <entry>v<subscript>5</subscript></entry>
+ <entry>v<subscript>4</subscript></entry>
+ <entry>v<subscript>3</subscript></entry>
+ <entry>v<subscript>2</subscript></entry>
+ <entry>v<subscript>1</subscript></entry>
+ <entry>v<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-UYVY8-1_5X8">
+ <entry>MEDIA_BUS_FMT_UYVY8_1_5X8</entry>
+ <entry>0x2002</entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>u<subscript>7</subscript></entry>
+ <entry>u<subscript>6</subscript></entry>
+ <entry>u<subscript>5</subscript></entry>
+ <entry>u<subscript>4</subscript></entry>
+ <entry>u<subscript>3</subscript></entry>
+ <entry>u<subscript>2</subscript></entry>
+ <entry>u<subscript>1</subscript></entry>
+ <entry>u<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>v<subscript>7</subscript></entry>
+ <entry>v<subscript>6</subscript></entry>
+ <entry>v<subscript>5</subscript></entry>
+ <entry>v<subscript>4</subscript></entry>
+ <entry>v<subscript>3</subscript></entry>
+ <entry>v<subscript>2</subscript></entry>
+ <entry>v<subscript>1</subscript></entry>
+ <entry>v<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-VYUY8-1_5X8">
+ <entry>MEDIA_BUS_FMT_VYUY8_1_5X8</entry>
+ <entry>0x2003</entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>v<subscript>7</subscript></entry>
+ <entry>v<subscript>6</subscript></entry>
+ <entry>v<subscript>5</subscript></entry>
+ <entry>v<subscript>4</subscript></entry>
+ <entry>v<subscript>3</subscript></entry>
+ <entry>v<subscript>2</subscript></entry>
+ <entry>v<subscript>1</subscript></entry>
+ <entry>v<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>u<subscript>7</subscript></entry>
+ <entry>u<subscript>6</subscript></entry>
+ <entry>u<subscript>5</subscript></entry>
+ <entry>u<subscript>4</subscript></entry>
+ <entry>u<subscript>3</subscript></entry>
+ <entry>u<subscript>2</subscript></entry>
+ <entry>u<subscript>1</subscript></entry>
+ <entry>u<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-YUYV8-1_5X8">
+ <entry>MEDIA_BUS_FMT_YUYV8_1_5X8</entry>
+ <entry>0x2004</entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>u<subscript>7</subscript></entry>
+ <entry>u<subscript>6</subscript></entry>
+ <entry>u<subscript>5</subscript></entry>
+ <entry>u<subscript>4</subscript></entry>
+ <entry>u<subscript>3</subscript></entry>
+ <entry>u<subscript>2</subscript></entry>
+ <entry>u<subscript>1</subscript></entry>
+ <entry>u<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>v<subscript>7</subscript></entry>
+ <entry>v<subscript>6</subscript></entry>
+ <entry>v<subscript>5</subscript></entry>
+ <entry>v<subscript>4</subscript></entry>
+ <entry>v<subscript>3</subscript></entry>
+ <entry>v<subscript>2</subscript></entry>
+ <entry>v<subscript>1</subscript></entry>
+ <entry>v<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-YVYU8-1_5X8">
+ <entry>MEDIA_BUS_FMT_YVYU8_1_5X8</entry>
+ <entry>0x2005</entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>v<subscript>7</subscript></entry>
+ <entry>v<subscript>6</subscript></entry>
+ <entry>v<subscript>5</subscript></entry>
+ <entry>v<subscript>4</subscript></entry>
+ <entry>v<subscript>3</subscript></entry>
+ <entry>v<subscript>2</subscript></entry>
+ <entry>v<subscript>1</subscript></entry>
+ <entry>v<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>u<subscript>7</subscript></entry>
+ <entry>u<subscript>6</subscript></entry>
+ <entry>u<subscript>5</subscript></entry>
+ <entry>u<subscript>4</subscript></entry>
+ <entry>u<subscript>3</subscript></entry>
+ <entry>u<subscript>2</subscript></entry>
+ <entry>u<subscript>1</subscript></entry>
+ <entry>u<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-UYVY8-2X8">
+ <entry>MEDIA_BUS_FMT_UYVY8_2X8</entry>
+ <entry>0x2006</entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>u<subscript>7</subscript></entry>
+ <entry>u<subscript>6</subscript></entry>
+ <entry>u<subscript>5</subscript></entry>
+ <entry>u<subscript>4</subscript></entry>
+ <entry>u<subscript>3</subscript></entry>
+ <entry>u<subscript>2</subscript></entry>
+ <entry>u<subscript>1</subscript></entry>
+ <entry>u<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>v<subscript>7</subscript></entry>
+ <entry>v<subscript>6</subscript></entry>
+ <entry>v<subscript>5</subscript></entry>
+ <entry>v<subscript>4</subscript></entry>
+ <entry>v<subscript>3</subscript></entry>
+ <entry>v<subscript>2</subscript></entry>
+ <entry>v<subscript>1</subscript></entry>
+ <entry>v<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-VYUY8-2X8">
+ <entry>MEDIA_BUS_FMT_VYUY8_2X8</entry>
+ <entry>0x2007</entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>v<subscript>7</subscript></entry>
+ <entry>v<subscript>6</subscript></entry>
+ <entry>v<subscript>5</subscript></entry>
+ <entry>v<subscript>4</subscript></entry>
+ <entry>v<subscript>3</subscript></entry>
+ <entry>v<subscript>2</subscript></entry>
+ <entry>v<subscript>1</subscript></entry>
+ <entry>v<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>u<subscript>7</subscript></entry>
+ <entry>u<subscript>6</subscript></entry>
+ <entry>u<subscript>5</subscript></entry>
+ <entry>u<subscript>4</subscript></entry>
+ <entry>u<subscript>3</subscript></entry>
+ <entry>u<subscript>2</subscript></entry>
+ <entry>u<subscript>1</subscript></entry>
+ <entry>u<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-YUYV8-2X8">
+ <entry>MEDIA_BUS_FMT_YUYV8_2X8</entry>
+ <entry>0x2008</entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>u<subscript>7</subscript></entry>
+ <entry>u<subscript>6</subscript></entry>
+ <entry>u<subscript>5</subscript></entry>
+ <entry>u<subscript>4</subscript></entry>
+ <entry>u<subscript>3</subscript></entry>
+ <entry>u<subscript>2</subscript></entry>
+ <entry>u<subscript>1</subscript></entry>
+ <entry>u<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>v<subscript>7</subscript></entry>
+ <entry>v<subscript>6</subscript></entry>
+ <entry>v<subscript>5</subscript></entry>
+ <entry>v<subscript>4</subscript></entry>
+ <entry>v<subscript>3</subscript></entry>
+ <entry>v<subscript>2</subscript></entry>
+ <entry>v<subscript>1</subscript></entry>
+ <entry>v<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-YVYU8-2X8">
+ <entry>MEDIA_BUS_FMT_YVYU8_2X8</entry>
+ <entry>0x2009</entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>v<subscript>7</subscript></entry>
+ <entry>v<subscript>6</subscript></entry>
+ <entry>v<subscript>5</subscript></entry>
+ <entry>v<subscript>4</subscript></entry>
+ <entry>v<subscript>3</subscript></entry>
+ <entry>v<subscript>2</subscript></entry>
+ <entry>v<subscript>1</subscript></entry>
+ <entry>v<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-24;
+ <entry>u<subscript>7</subscript></entry>
+ <entry>u<subscript>6</subscript></entry>
+ <entry>u<subscript>5</subscript></entry>
+ <entry>u<subscript>4</subscript></entry>
+ <entry>u<subscript>3</subscript></entry>
+ <entry>u<subscript>2</subscript></entry>
+ <entry>u<subscript>1</subscript></entry>
+ <entry>u<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-Y10-1X10">
+ <entry>MEDIA_BUS_FMT_Y10_1X10</entry>
+ <entry>0x200a</entry>
+ <entry></entry>
+ &dash-ent-22;
+ <entry>y<subscript>9</subscript></entry>
+ <entry>y<subscript>8</subscript></entry>
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-UYVY10-2X10">
+ <entry>MEDIA_BUS_FMT_UYVY10_2X10</entry>
+ <entry>0x2018</entry>
+ <entry></entry>
+ &dash-ent-22;
+ <entry>u<subscript>9</subscript></entry>
+ <entry>u<subscript>8</subscript></entry>
+ <entry>u<subscript>7</subscript></entry>
+ <entry>u<subscript>6</subscript></entry>
+ <entry>u<subscript>5</subscript></entry>
+ <entry>u<subscript>4</subscript></entry>
+ <entry>u<subscript>3</subscript></entry>
+ <entry>u<subscript>2</subscript></entry>
+ <entry>u<subscript>1</subscript></entry>
+ <entry>u<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-22;
+ <entry>y<subscript>9</subscript></entry>
+ <entry>y<subscript>8</subscript></entry>
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-22;
+ <entry>v<subscript>9</subscript></entry>
+ <entry>v<subscript>8</subscript></entry>
+ <entry>v<subscript>7</subscript></entry>
+ <entry>v<subscript>6</subscript></entry>
+ <entry>v<subscript>5</subscript></entry>
+ <entry>v<subscript>4</subscript></entry>
+ <entry>v<subscript>3</subscript></entry>
+ <entry>v<subscript>2</subscript></entry>
+ <entry>v<subscript>1</subscript></entry>
+ <entry>v<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-22;
+ <entry>y<subscript>9</subscript></entry>
+ <entry>y<subscript>8</subscript></entry>
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-VYUY10-2X10">
+ <entry>MEDIA_BUS_FMT_VYUY10_2X10</entry>
+ <entry>0x2019</entry>
+ <entry></entry>
+ &dash-ent-22;
+ <entry>v<subscript>9</subscript></entry>
+ <entry>v<subscript>8</subscript></entry>
+ <entry>v<subscript>7</subscript></entry>
+ <entry>v<subscript>6</subscript></entry>
+ <entry>v<subscript>5</subscript></entry>
+ <entry>v<subscript>4</subscript></entry>
+ <entry>v<subscript>3</subscript></entry>
+ <entry>v<subscript>2</subscript></entry>
+ <entry>v<subscript>1</subscript></entry>
+ <entry>v<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-22;
+ <entry>y<subscript>9</subscript></entry>
+ <entry>y<subscript>8</subscript></entry>
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-22;
+ <entry>u<subscript>9</subscript></entry>
+ <entry>u<subscript>8</subscript></entry>
+ <entry>u<subscript>7</subscript></entry>
+ <entry>u<subscript>6</subscript></entry>
+ <entry>u<subscript>5</subscript></entry>
+ <entry>u<subscript>4</subscript></entry>
+ <entry>u<subscript>3</subscript></entry>
+ <entry>u<subscript>2</subscript></entry>
+ <entry>u<subscript>1</subscript></entry>
+ <entry>u<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-22;
+ <entry>y<subscript>9</subscript></entry>
+ <entry>y<subscript>8</subscript></entry>
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-YUYV10-2X10">
+ <entry>MEDIA_BUS_FMT_YUYV10_2X10</entry>
+ <entry>0x200b</entry>
+ <entry></entry>
+ &dash-ent-22;
+ <entry>y<subscript>9</subscript></entry>
+ <entry>y<subscript>8</subscript></entry>
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-22;
+ <entry>u<subscript>9</subscript></entry>
+ <entry>u<subscript>8</subscript></entry>
+ <entry>u<subscript>7</subscript></entry>
+ <entry>u<subscript>6</subscript></entry>
+ <entry>u<subscript>5</subscript></entry>
+ <entry>u<subscript>4</subscript></entry>
+ <entry>u<subscript>3</subscript></entry>
+ <entry>u<subscript>2</subscript></entry>
+ <entry>u<subscript>1</subscript></entry>
+ <entry>u<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-22;
+ <entry>y<subscript>9</subscript></entry>
+ <entry>y<subscript>8</subscript></entry>
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-22;
+ <entry>v<subscript>9</subscript></entry>
+ <entry>v<subscript>8</subscript></entry>
+ <entry>v<subscript>7</subscript></entry>
+ <entry>v<subscript>6</subscript></entry>
+ <entry>v<subscript>5</subscript></entry>
+ <entry>v<subscript>4</subscript></entry>
+ <entry>v<subscript>3</subscript></entry>
+ <entry>v<subscript>2</subscript></entry>
+ <entry>v<subscript>1</subscript></entry>
+ <entry>v<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-YVYU10-2X10">
+ <entry>MEDIA_BUS_FMT_YVYU10_2X10</entry>
+ <entry>0x200c</entry>
+ <entry></entry>
+ &dash-ent-22;
+ <entry>y<subscript>9</subscript></entry>
+ <entry>y<subscript>8</subscript></entry>
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-22;
+ <entry>v<subscript>9</subscript></entry>
+ <entry>v<subscript>8</subscript></entry>
+ <entry>v<subscript>7</subscript></entry>
+ <entry>v<subscript>6</subscript></entry>
+ <entry>v<subscript>5</subscript></entry>
+ <entry>v<subscript>4</subscript></entry>
+ <entry>v<subscript>3</subscript></entry>
+ <entry>v<subscript>2</subscript></entry>
+ <entry>v<subscript>1</subscript></entry>
+ <entry>v<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-22;
+ <entry>y<subscript>9</subscript></entry>
+ <entry>y<subscript>8</subscript></entry>
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-22;
+ <entry>u<subscript>9</subscript></entry>
+ <entry>u<subscript>8</subscript></entry>
+ <entry>u<subscript>7</subscript></entry>
+ <entry>u<subscript>6</subscript></entry>
+ <entry>u<subscript>5</subscript></entry>
+ <entry>u<subscript>4</subscript></entry>
+ <entry>u<subscript>3</subscript></entry>
+ <entry>u<subscript>2</subscript></entry>
+ <entry>u<subscript>1</subscript></entry>
+ <entry>u<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-Y12-1X12">
+ <entry>MEDIA_BUS_FMT_Y12_1X12</entry>
+ <entry>0x2013</entry>
+ <entry></entry>
+ &dash-ent-20;
+ <entry>y<subscript>11</subscript></entry>
+ <entry>y<subscript>10</subscript></entry>
+ <entry>y<subscript>9</subscript></entry>
+ <entry>y<subscript>8</subscript></entry>
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-UYVY12-2X12">
+ <entry>MEDIA_BUS_FMT_UYVY12_2X12</entry>
+ <entry>0x201c</entry>
+ <entry></entry>
+ &dash-ent-20;
+ <entry>u<subscript>11</subscript></entry>
+ <entry>u<subscript>10</subscript></entry>
+ <entry>u<subscript>9</subscript></entry>
+ <entry>u<subscript>8</subscript></entry>
+ <entry>u<subscript>7</subscript></entry>
+ <entry>u<subscript>6</subscript></entry>
+ <entry>u<subscript>5</subscript></entry>
+ <entry>u<subscript>4</subscript></entry>
+ <entry>u<subscript>3</subscript></entry>
+ <entry>u<subscript>2</subscript></entry>
+ <entry>u<subscript>1</subscript></entry>
+ <entry>u<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-20;
+ <entry>y<subscript>11</subscript></entry>
+ <entry>y<subscript>10</subscript></entry>
+ <entry>y<subscript>9</subscript></entry>
+ <entry>y<subscript>8</subscript></entry>
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-20;
+ <entry>v<subscript>11</subscript></entry>
+ <entry>v<subscript>10</subscript></entry>
+ <entry>v<subscript>9</subscript></entry>
+ <entry>v<subscript>8</subscript></entry>
+ <entry>v<subscript>7</subscript></entry>
+ <entry>v<subscript>6</subscript></entry>
+ <entry>v<subscript>5</subscript></entry>
+ <entry>v<subscript>4</subscript></entry>
+ <entry>v<subscript>3</subscript></entry>
+ <entry>v<subscript>2</subscript></entry>
+ <entry>v<subscript>1</subscript></entry>
+ <entry>v<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-20;
+ <entry>y<subscript>11</subscript></entry>
+ <entry>y<subscript>10</subscript></entry>
+ <entry>y<subscript>9</subscript></entry>
+ <entry>y<subscript>8</subscript></entry>
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-VYUY12-2X12">
+ <entry>MEDIA_BUS_FMT_VYUY12_2X12</entry>
+ <entry>0x201d</entry>
+ <entry></entry>
+ &dash-ent-20;
+ <entry>v<subscript>11</subscript></entry>
+ <entry>v<subscript>10</subscript></entry>
+ <entry>v<subscript>9</subscript></entry>
+ <entry>v<subscript>8</subscript></entry>
+ <entry>v<subscript>7</subscript></entry>
+ <entry>v<subscript>6</subscript></entry>
+ <entry>v<subscript>5</subscript></entry>
+ <entry>v<subscript>4</subscript></entry>
+ <entry>v<subscript>3</subscript></entry>
+ <entry>v<subscript>2</subscript></entry>
+ <entry>v<subscript>1</subscript></entry>
+ <entry>v<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-20;
+ <entry>y<subscript>11</subscript></entry>
+ <entry>y<subscript>10</subscript></entry>
+ <entry>y<subscript>9</subscript></entry>
+ <entry>y<subscript>8</subscript></entry>
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-20;
+ <entry>u<subscript>11</subscript></entry>
+ <entry>u<subscript>10</subscript></entry>
+ <entry>u<subscript>9</subscript></entry>
+ <entry>u<subscript>8</subscript></entry>
+ <entry>u<subscript>7</subscript></entry>
+ <entry>u<subscript>6</subscript></entry>
+ <entry>u<subscript>5</subscript></entry>
+ <entry>u<subscript>4</subscript></entry>
+ <entry>u<subscript>3</subscript></entry>
+ <entry>u<subscript>2</subscript></entry>
+ <entry>u<subscript>1</subscript></entry>
+ <entry>u<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-20;
+ <entry>y<subscript>11</subscript></entry>
+ <entry>y<subscript>10</subscript></entry>
+ <entry>y<subscript>9</subscript></entry>
+ <entry>y<subscript>8</subscript></entry>
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-YUYV12-2X12">
+ <entry>MEDIA_BUS_FMT_YUYV12_2X12</entry>
+ <entry>0x201e</entry>
+ <entry></entry>
+ &dash-ent-20;
+ <entry>y<subscript>11</subscript></entry>
+ <entry>y<subscript>10</subscript></entry>
+ <entry>y<subscript>9</subscript></entry>
+ <entry>y<subscript>8</subscript></entry>
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-20;
+ <entry>u<subscript>11</subscript></entry>
+ <entry>u<subscript>10</subscript></entry>
+ <entry>u<subscript>9</subscript></entry>
+ <entry>u<subscript>8</subscript></entry>
+ <entry>u<subscript>7</subscript></entry>
+ <entry>u<subscript>6</subscript></entry>
+ <entry>u<subscript>5</subscript></entry>
+ <entry>u<subscript>4</subscript></entry>
+ <entry>u<subscript>3</subscript></entry>
+ <entry>u<subscript>2</subscript></entry>
+ <entry>u<subscript>1</subscript></entry>
+ <entry>u<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-20;
+ <entry>y<subscript>11</subscript></entry>
+ <entry>y<subscript>10</subscript></entry>
+ <entry>y<subscript>9</subscript></entry>
+ <entry>y<subscript>8</subscript></entry>
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-20;
+ <entry>v<subscript>11</subscript></entry>
+ <entry>v<subscript>10</subscript></entry>
+ <entry>v<subscript>9</subscript></entry>
+ <entry>v<subscript>8</subscript></entry>
+ <entry>v<subscript>7</subscript></entry>
+ <entry>v<subscript>6</subscript></entry>
+ <entry>v<subscript>5</subscript></entry>
+ <entry>v<subscript>4</subscript></entry>
+ <entry>v<subscript>3</subscript></entry>
+ <entry>v<subscript>2</subscript></entry>
+ <entry>v<subscript>1</subscript></entry>
+ <entry>v<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-YVYU12-2X12">
+ <entry>MEDIA_BUS_FMT_YVYU12_2X12</entry>
+ <entry>0x201f</entry>
+ <entry></entry>
+ &dash-ent-20;
+ <entry>y<subscript>11</subscript></entry>
+ <entry>y<subscript>10</subscript></entry>
+ <entry>y<subscript>9</subscript></entry>
+ <entry>y<subscript>8</subscript></entry>
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-20;
+ <entry>v<subscript>11</subscript></entry>
+ <entry>v<subscript>10</subscript></entry>
+ <entry>v<subscript>9</subscript></entry>
+ <entry>v<subscript>8</subscript></entry>
+ <entry>v<subscript>7</subscript></entry>
+ <entry>v<subscript>6</subscript></entry>
+ <entry>v<subscript>5</subscript></entry>
+ <entry>v<subscript>4</subscript></entry>
+ <entry>v<subscript>3</subscript></entry>
+ <entry>v<subscript>2</subscript></entry>
+ <entry>v<subscript>1</subscript></entry>
+ <entry>v<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-20;
+ <entry>y<subscript>11</subscript></entry>
+ <entry>y<subscript>10</subscript></entry>
+ <entry>y<subscript>9</subscript></entry>
+ <entry>y<subscript>8</subscript></entry>
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-20;
+ <entry>u<subscript>11</subscript></entry>
+ <entry>u<subscript>10</subscript></entry>
+ <entry>u<subscript>9</subscript></entry>
+ <entry>u<subscript>8</subscript></entry>
+ <entry>u<subscript>7</subscript></entry>
+ <entry>u<subscript>6</subscript></entry>
+ <entry>u<subscript>5</subscript></entry>
+ <entry>u<subscript>4</subscript></entry>
+ <entry>u<subscript>3</subscript></entry>
+ <entry>u<subscript>2</subscript></entry>
+ <entry>u<subscript>1</subscript></entry>
+ <entry>u<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-UYVY8-1X16">
+ <entry>MEDIA_BUS_FMT_UYVY8_1X16</entry>
+ <entry>0x200f</entry>
+ <entry></entry>
+ &dash-ent-16;
+ <entry>u<subscript>7</subscript></entry>
+ <entry>u<subscript>6</subscript></entry>
+ <entry>u<subscript>5</subscript></entry>
+ <entry>u<subscript>4</subscript></entry>
+ <entry>u<subscript>3</subscript></entry>
+ <entry>u<subscript>2</subscript></entry>
+ <entry>u<subscript>1</subscript></entry>
+ <entry>u<subscript>0</subscript></entry>
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-16;
+ <entry>v<subscript>7</subscript></entry>
+ <entry>v<subscript>6</subscript></entry>
+ <entry>v<subscript>5</subscript></entry>
+ <entry>v<subscript>4</subscript></entry>
+ <entry>v<subscript>3</subscript></entry>
+ <entry>v<subscript>2</subscript></entry>
+ <entry>v<subscript>1</subscript></entry>
+ <entry>v<subscript>0</subscript></entry>
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-VYUY8-1X16">
+ <entry>MEDIA_BUS_FMT_VYUY8_1X16</entry>
+ <entry>0x2010</entry>
+ <entry></entry>
+ &dash-ent-16;
+ <entry>v<subscript>7</subscript></entry>
+ <entry>v<subscript>6</subscript></entry>
+ <entry>v<subscript>5</subscript></entry>
+ <entry>v<subscript>4</subscript></entry>
+ <entry>v<subscript>3</subscript></entry>
+ <entry>v<subscript>2</subscript></entry>
+ <entry>v<subscript>1</subscript></entry>
+ <entry>v<subscript>0</subscript></entry>
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-16;
+ <entry>u<subscript>7</subscript></entry>
+ <entry>u<subscript>6</subscript></entry>
+ <entry>u<subscript>5</subscript></entry>
+ <entry>u<subscript>4</subscript></entry>
+ <entry>u<subscript>3</subscript></entry>
+ <entry>u<subscript>2</subscript></entry>
+ <entry>u<subscript>1</subscript></entry>
+ <entry>u<subscript>0</subscript></entry>
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-YUYV8-1X16">
+ <entry>MEDIA_BUS_FMT_YUYV8_1X16</entry>
+ <entry>0x2011</entry>
+ <entry></entry>
+ &dash-ent-16;
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ <entry>u<subscript>7</subscript></entry>
+ <entry>u<subscript>6</subscript></entry>
+ <entry>u<subscript>5</subscript></entry>
+ <entry>u<subscript>4</subscript></entry>
+ <entry>u<subscript>3</subscript></entry>
+ <entry>u<subscript>2</subscript></entry>
+ <entry>u<subscript>1</subscript></entry>
+ <entry>u<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-16;
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ <entry>v<subscript>7</subscript></entry>
+ <entry>v<subscript>6</subscript></entry>
+ <entry>v<subscript>5</subscript></entry>
+ <entry>v<subscript>4</subscript></entry>
+ <entry>v<subscript>3</subscript></entry>
+ <entry>v<subscript>2</subscript></entry>
+ <entry>v<subscript>1</subscript></entry>
+ <entry>v<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-YVYU8-1X16">
+ <entry>MEDIA_BUS_FMT_YVYU8_1X16</entry>
+ <entry>0x2012</entry>
+ <entry></entry>
+ &dash-ent-16;
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ <entry>v<subscript>7</subscript></entry>
+ <entry>v<subscript>6</subscript></entry>
+ <entry>v<subscript>5</subscript></entry>
+ <entry>v<subscript>4</subscript></entry>
+ <entry>v<subscript>3</subscript></entry>
+ <entry>v<subscript>2</subscript></entry>
+ <entry>v<subscript>1</subscript></entry>
+ <entry>v<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-16;
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ <entry>u<subscript>7</subscript></entry>
+ <entry>u<subscript>6</subscript></entry>
+ <entry>u<subscript>5</subscript></entry>
+ <entry>u<subscript>4</subscript></entry>
+ <entry>u<subscript>3</subscript></entry>
+ <entry>u<subscript>2</subscript></entry>
+ <entry>u<subscript>1</subscript></entry>
+ <entry>u<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-YDYUYDYV8-1X16">
+ <entry>MEDIA_BUS_FMT_YDYUYDYV8_1X16</entry>
+ <entry>0x2014</entry>
+ <entry></entry>
+ &dash-ent-16;
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ <entry>d</entry>
+ <entry>d</entry>
+ <entry>d</entry>
+ <entry>d</entry>
+ <entry>d</entry>
+ <entry>d</entry>
+ <entry>d</entry>
+ <entry>d</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-16;
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ <entry>u<subscript>7</subscript></entry>
+ <entry>u<subscript>6</subscript></entry>
+ <entry>u<subscript>5</subscript></entry>
+ <entry>u<subscript>4</subscript></entry>
+ <entry>u<subscript>3</subscript></entry>
+ <entry>u<subscript>2</subscript></entry>
+ <entry>u<subscript>1</subscript></entry>
+ <entry>u<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-16;
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ <entry>d</entry>
+ <entry>d</entry>
+ <entry>d</entry>
+ <entry>d</entry>
+ <entry>d</entry>
+ <entry>d</entry>
+ <entry>d</entry>
+ <entry>d</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-16;
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ <entry>v<subscript>7</subscript></entry>
+ <entry>v<subscript>6</subscript></entry>
+ <entry>v<subscript>5</subscript></entry>
+ <entry>v<subscript>4</subscript></entry>
+ <entry>v<subscript>3</subscript></entry>
+ <entry>v<subscript>2</subscript></entry>
+ <entry>v<subscript>1</subscript></entry>
+ <entry>v<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-UYVY10-1X20">
+ <entry>MEDIA_BUS_FMT_UYVY10_1X20</entry>
+ <entry>0x201a</entry>
+ <entry></entry>
+ &dash-ent-12;
+ <entry>u<subscript>9</subscript></entry>
+ <entry>u<subscript>8</subscript></entry>
+ <entry>u<subscript>7</subscript></entry>
+ <entry>u<subscript>6</subscript></entry>
+ <entry>u<subscript>5</subscript></entry>
+ <entry>u<subscript>4</subscript></entry>
+ <entry>u<subscript>3</subscript></entry>
+ <entry>u<subscript>2</subscript></entry>
+ <entry>u<subscript>1</subscript></entry>
+ <entry>u<subscript>0</subscript></entry>
+ <entry>y<subscript>9</subscript></entry>
+ <entry>y<subscript>8</subscript></entry>
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-12;
+ <entry>v<subscript>9</subscript></entry>
+ <entry>v<subscript>8</subscript></entry>
+ <entry>v<subscript>7</subscript></entry>
+ <entry>v<subscript>6</subscript></entry>
+ <entry>v<subscript>5</subscript></entry>
+ <entry>v<subscript>4</subscript></entry>
+ <entry>v<subscript>3</subscript></entry>
+ <entry>v<subscript>2</subscript></entry>
+ <entry>v<subscript>1</subscript></entry>
+ <entry>v<subscript>0</subscript></entry>
+ <entry>y<subscript>9</subscript></entry>
+ <entry>y<subscript>8</subscript></entry>
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-VYUY10-1X20">
+ <entry>MEDIA_BUS_FMT_VYUY10_1X20</entry>
+ <entry>0x201b</entry>
+ <entry></entry>
+ &dash-ent-12;
+ <entry>v<subscript>9</subscript></entry>
+ <entry>v<subscript>8</subscript></entry>
+ <entry>v<subscript>7</subscript></entry>
+ <entry>v<subscript>6</subscript></entry>
+ <entry>v<subscript>5</subscript></entry>
+ <entry>v<subscript>4</subscript></entry>
+ <entry>v<subscript>3</subscript></entry>
+ <entry>v<subscript>2</subscript></entry>
+ <entry>v<subscript>1</subscript></entry>
+ <entry>v<subscript>0</subscript></entry>
+ <entry>y<subscript>9</subscript></entry>
+ <entry>y<subscript>8</subscript></entry>
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-12;
+ <entry>u<subscript>9</subscript></entry>
+ <entry>u<subscript>8</subscript></entry>
+ <entry>u<subscript>7</subscript></entry>
+ <entry>u<subscript>6</subscript></entry>
+ <entry>u<subscript>5</subscript></entry>
+ <entry>u<subscript>4</subscript></entry>
+ <entry>u<subscript>3</subscript></entry>
+ <entry>u<subscript>2</subscript></entry>
+ <entry>u<subscript>1</subscript></entry>
+ <entry>u<subscript>0</subscript></entry>
+ <entry>y<subscript>9</subscript></entry>
+ <entry>y<subscript>8</subscript></entry>
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-YUYV10-1X20">
+ <entry>MEDIA_BUS_FMT_YUYV10_1X20</entry>
+ <entry>0x200d</entry>
+ <entry></entry>
+ &dash-ent-12;
+ <entry>y<subscript>9</subscript></entry>
+ <entry>y<subscript>8</subscript></entry>
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ <entry>u<subscript>9</subscript></entry>
+ <entry>u<subscript>8</subscript></entry>
+ <entry>u<subscript>7</subscript></entry>
+ <entry>u<subscript>6</subscript></entry>
+ <entry>u<subscript>5</subscript></entry>
+ <entry>u<subscript>4</subscript></entry>
+ <entry>u<subscript>3</subscript></entry>
+ <entry>u<subscript>2</subscript></entry>
+ <entry>u<subscript>1</subscript></entry>
+ <entry>u<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-12;
+ <entry>y<subscript>9</subscript></entry>
+ <entry>y<subscript>8</subscript></entry>
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ <entry>v<subscript>9</subscript></entry>
+ <entry>v<subscript>8</subscript></entry>
+ <entry>v<subscript>7</subscript></entry>
+ <entry>v<subscript>6</subscript></entry>
+ <entry>v<subscript>5</subscript></entry>
+ <entry>v<subscript>4</subscript></entry>
+ <entry>v<subscript>3</subscript></entry>
+ <entry>v<subscript>2</subscript></entry>
+ <entry>v<subscript>1</subscript></entry>
+ <entry>v<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-YVYU10-1X20">
+ <entry>MEDIA_BUS_FMT_YVYU10_1X20</entry>
+ <entry>0x200e</entry>
+ <entry></entry>
+ &dash-ent-12;
+ <entry>y<subscript>9</subscript></entry>
+ <entry>y<subscript>8</subscript></entry>
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ <entry>v<subscript>9</subscript></entry>
+ <entry>v<subscript>8</subscript></entry>
+ <entry>v<subscript>7</subscript></entry>
+ <entry>v<subscript>6</subscript></entry>
+ <entry>v<subscript>5</subscript></entry>
+ <entry>v<subscript>4</subscript></entry>
+ <entry>v<subscript>3</subscript></entry>
+ <entry>v<subscript>2</subscript></entry>
+ <entry>v<subscript>1</subscript></entry>
+ <entry>v<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-12;
+ <entry>y<subscript>9</subscript></entry>
+ <entry>y<subscript>8</subscript></entry>
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ <entry>u<subscript>9</subscript></entry>
+ <entry>u<subscript>8</subscript></entry>
+ <entry>u<subscript>7</subscript></entry>
+ <entry>u<subscript>6</subscript></entry>
+ <entry>u<subscript>5</subscript></entry>
+ <entry>u<subscript>4</subscript></entry>
+ <entry>u<subscript>3</subscript></entry>
+ <entry>u<subscript>2</subscript></entry>
+ <entry>u<subscript>1</subscript></entry>
+ <entry>u<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-VUY8-1X24">
+ <entry>MEDIA_BUS_FMT_VUY8_1X24</entry>
+ <entry>0x201a</entry>
+ <entry></entry>
+ &dash-ent-8;
+ <entry>v<subscript>7</subscript></entry>
+ <entry>v<subscript>6</subscript></entry>
+ <entry>v<subscript>5</subscript></entry>
+ <entry>v<subscript>4</subscript></entry>
+ <entry>v<subscript>3</subscript></entry>
+ <entry>v<subscript>2</subscript></entry>
+ <entry>v<subscript>1</subscript></entry>
+ <entry>v<subscript>0</subscript></entry>
+ <entry>u<subscript>7</subscript></entry>
+ <entry>u<subscript>6</subscript></entry>
+ <entry>u<subscript>5</subscript></entry>
+ <entry>u<subscript>4</subscript></entry>
+ <entry>u<subscript>3</subscript></entry>
+ <entry>u<subscript>2</subscript></entry>
+ <entry>u<subscript>1</subscript></entry>
+ <entry>u<subscript>0</subscript></entry>
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-YUV8-1X24">
+ <entry>MEDIA_BUS_FMT_YUV8_1X24</entry>
+ <entry>0x2025</entry>
+ <entry></entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ <entry>u<subscript>7</subscript></entry>
+ <entry>u<subscript>6</subscript></entry>
+ <entry>u<subscript>5</subscript></entry>
+ <entry>u<subscript>4</subscript></entry>
+ <entry>u<subscript>3</subscript></entry>
+ <entry>u<subscript>2</subscript></entry>
+ <entry>u<subscript>1</subscript></entry>
+ <entry>u<subscript>0</subscript></entry>
+ <entry>v<subscript>7</subscript></entry>
+ <entry>v<subscript>6</subscript></entry>
+ <entry>v<subscript>5</subscript></entry>
+ <entry>v<subscript>4</subscript></entry>
+ <entry>v<subscript>3</subscript></entry>
+ <entry>v<subscript>2</subscript></entry>
+ <entry>v<subscript>1</subscript></entry>
+ <entry>v<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-UYVY12-1X24">
+ <entry>MEDIA_BUS_FMT_UYVY12_1X24</entry>
+ <entry>0x2020</entry>
+ <entry></entry>
+ &dash-ent-8;
+ <entry>u<subscript>11</subscript></entry>
+ <entry>u<subscript>10</subscript></entry>
+ <entry>u<subscript>9</subscript></entry>
+ <entry>u<subscript>8</subscript></entry>
+ <entry>u<subscript>7</subscript></entry>
+ <entry>u<subscript>6</subscript></entry>
+ <entry>u<subscript>5</subscript></entry>
+ <entry>u<subscript>4</subscript></entry>
+ <entry>u<subscript>3</subscript></entry>
+ <entry>u<subscript>2</subscript></entry>
+ <entry>u<subscript>1</subscript></entry>
+ <entry>u<subscript>0</subscript></entry>
+ <entry>y<subscript>11</subscript></entry>
+ <entry>y<subscript>10</subscript></entry>
+ <entry>y<subscript>9</subscript></entry>
+ <entry>y<subscript>8</subscript></entry>
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-8;
+ <entry>v<subscript>11</subscript></entry>
+ <entry>v<subscript>10</subscript></entry>
+ <entry>v<subscript>9</subscript></entry>
+ <entry>v<subscript>8</subscript></entry>
+ <entry>v<subscript>7</subscript></entry>
+ <entry>v<subscript>6</subscript></entry>
+ <entry>v<subscript>5</subscript></entry>
+ <entry>v<subscript>4</subscript></entry>
+ <entry>v<subscript>3</subscript></entry>
+ <entry>v<subscript>2</subscript></entry>
+ <entry>v<subscript>1</subscript></entry>
+ <entry>v<subscript>0</subscript></entry>
+ <entry>y<subscript>11</subscript></entry>
+ <entry>y<subscript>10</subscript></entry>
+ <entry>y<subscript>9</subscript></entry>
+ <entry>y<subscript>8</subscript></entry>
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-VYUY12-1X24">
+ <entry>MEDIA_BUS_FMT_VYUY12_1X24</entry>
+ <entry>0x2021</entry>
+ <entry></entry>
+ &dash-ent-8;
+ <entry>v<subscript>11</subscript></entry>
+ <entry>v<subscript>10</subscript></entry>
+ <entry>v<subscript>9</subscript></entry>
+ <entry>v<subscript>8</subscript></entry>
+ <entry>v<subscript>7</subscript></entry>
+ <entry>v<subscript>6</subscript></entry>
+ <entry>v<subscript>5</subscript></entry>
+ <entry>v<subscript>4</subscript></entry>
+ <entry>v<subscript>3</subscript></entry>
+ <entry>v<subscript>2</subscript></entry>
+ <entry>v<subscript>1</subscript></entry>
+ <entry>v<subscript>0</subscript></entry>
+ <entry>y<subscript>11</subscript></entry>
+ <entry>y<subscript>10</subscript></entry>
+ <entry>y<subscript>9</subscript></entry>
+ <entry>y<subscript>8</subscript></entry>
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-8;
+ <entry>u<subscript>11</subscript></entry>
+ <entry>u<subscript>10</subscript></entry>
+ <entry>u<subscript>9</subscript></entry>
+ <entry>u<subscript>8</subscript></entry>
+ <entry>u<subscript>7</subscript></entry>
+ <entry>u<subscript>6</subscript></entry>
+ <entry>u<subscript>5</subscript></entry>
+ <entry>u<subscript>4</subscript></entry>
+ <entry>u<subscript>3</subscript></entry>
+ <entry>u<subscript>2</subscript></entry>
+ <entry>u<subscript>1</subscript></entry>
+ <entry>u<subscript>0</subscript></entry>
+ <entry>y<subscript>11</subscript></entry>
+ <entry>y<subscript>10</subscript></entry>
+ <entry>y<subscript>9</subscript></entry>
+ <entry>y<subscript>8</subscript></entry>
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-YUYV12-1X24">
+ <entry>MEDIA_BUS_FMT_YUYV12_1X24</entry>
+ <entry>0x2022</entry>
+ <entry></entry>
+ &dash-ent-8;
+ <entry>y<subscript>11</subscript></entry>
+ <entry>y<subscript>10</subscript></entry>
+ <entry>y<subscript>9</subscript></entry>
+ <entry>y<subscript>8</subscript></entry>
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ <entry>u<subscript>11</subscript></entry>
+ <entry>u<subscript>10</subscript></entry>
+ <entry>u<subscript>9</subscript></entry>
+ <entry>u<subscript>8</subscript></entry>
+ <entry>u<subscript>7</subscript></entry>
+ <entry>u<subscript>6</subscript></entry>
+ <entry>u<subscript>5</subscript></entry>
+ <entry>u<subscript>4</subscript></entry>
+ <entry>u<subscript>3</subscript></entry>
+ <entry>u<subscript>2</subscript></entry>
+ <entry>u<subscript>1</subscript></entry>
+ <entry>u<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-8;
+ <entry>y<subscript>11</subscript></entry>
+ <entry>y<subscript>10</subscript></entry>
+ <entry>y<subscript>9</subscript></entry>
+ <entry>y<subscript>8</subscript></entry>
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ <entry>v<subscript>11</subscript></entry>
+ <entry>v<subscript>10</subscript></entry>
+ <entry>v<subscript>9</subscript></entry>
+ <entry>v<subscript>8</subscript></entry>
+ <entry>v<subscript>7</subscript></entry>
+ <entry>v<subscript>6</subscript></entry>
+ <entry>v<subscript>5</subscript></entry>
+ <entry>v<subscript>4</subscript></entry>
+ <entry>v<subscript>3</subscript></entry>
+ <entry>v<subscript>2</subscript></entry>
+ <entry>v<subscript>1</subscript></entry>
+ <entry>v<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-YVYU12-1X24">
+ <entry>MEDIA_BUS_FMT_YVYU12_1X24</entry>
+ <entry>0x2023</entry>
+ <entry></entry>
+ &dash-ent-8;
+ <entry>y<subscript>11</subscript></entry>
+ <entry>y<subscript>10</subscript></entry>
+ <entry>y<subscript>9</subscript></entry>
+ <entry>y<subscript>8</subscript></entry>
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ <entry>v<subscript>11</subscript></entry>
+ <entry>v<subscript>10</subscript></entry>
+ <entry>v<subscript>9</subscript></entry>
+ <entry>v<subscript>8</subscript></entry>
+ <entry>v<subscript>7</subscript></entry>
+ <entry>v<subscript>6</subscript></entry>
+ <entry>v<subscript>5</subscript></entry>
+ <entry>v<subscript>4</subscript></entry>
+ <entry>v<subscript>3</subscript></entry>
+ <entry>v<subscript>2</subscript></entry>
+ <entry>v<subscript>1</subscript></entry>
+ <entry>v<subscript>0</subscript></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ &dash-ent-8;
+ <entry>y<subscript>11</subscript></entry>
+ <entry>y<subscript>10</subscript></entry>
+ <entry>y<subscript>9</subscript></entry>
+ <entry>y<subscript>8</subscript></entry>
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ <entry>u<subscript>11</subscript></entry>
+ <entry>u<subscript>10</subscript></entry>
+ <entry>u<subscript>9</subscript></entry>
+ <entry>u<subscript>8</subscript></entry>
+ <entry>u<subscript>7</subscript></entry>
+ <entry>u<subscript>6</subscript></entry>
+ <entry>u<subscript>5</subscript></entry>
+ <entry>u<subscript>4</subscript></entry>
+ <entry>u<subscript>3</subscript></entry>
+ <entry>u<subscript>2</subscript></entry>
+ <entry>u<subscript>1</subscript></entry>
+ <entry>u<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-YUV10-1X30">
+ <entry>MEDIA_BUS_FMT_YUV10_1X30</entry>
+ <entry>0x2016</entry>
+ <entry></entry>
+ <entry>-</entry>
+ <entry>-</entry>
+ <entry>y<subscript>9</subscript></entry>
+ <entry>y<subscript>8</subscript></entry>
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ <entry>u<subscript>9</subscript></entry>
+ <entry>u<subscript>8</subscript></entry>
+ <entry>u<subscript>7</subscript></entry>
+ <entry>u<subscript>6</subscript></entry>
+ <entry>u<subscript>5</subscript></entry>
+ <entry>u<subscript>4</subscript></entry>
+ <entry>u<subscript>3</subscript></entry>
+ <entry>u<subscript>2</subscript></entry>
+ <entry>u<subscript>1</subscript></entry>
+ <entry>u<subscript>0</subscript></entry>
+ <entry>v<subscript>9</subscript></entry>
+ <entry>v<subscript>8</subscript></entry>
+ <entry>v<subscript>7</subscript></entry>
+ <entry>v<subscript>6</subscript></entry>
+ <entry>v<subscript>5</subscript></entry>
+ <entry>v<subscript>4</subscript></entry>
+ <entry>v<subscript>3</subscript></entry>
+ <entry>v<subscript>2</subscript></entry>
+ <entry>v<subscript>1</subscript></entry>
+ <entry>v<subscript>0</subscript></entry>
+ </row>
+ <row id="MEDIA-BUS-FMT-AYUV8-1X32">
+ <entry>MEDIA_BUS_FMT_AYUV8_1X32</entry>
+ <entry>0x2017</entry>
+ <entry></entry>
+ <entry>a<subscript>7</subscript></entry>
+ <entry>a<subscript>6</subscript></entry>
+ <entry>a<subscript>5</subscript></entry>
+ <entry>a<subscript>4</subscript></entry>
+ <entry>a<subscript>3</subscript></entry>
+ <entry>a<subscript>2</subscript></entry>
+ <entry>a<subscript>1</subscript></entry>
+ <entry>a<subscript>0</subscript></entry>
+ <entry>y<subscript>7</subscript></entry>
+ <entry>y<subscript>6</subscript></entry>
+ <entry>y<subscript>5</subscript></entry>
+ <entry>y<subscript>4</subscript></entry>
+ <entry>y<subscript>3</subscript></entry>
+ <entry>y<subscript>2</subscript></entry>
+ <entry>y<subscript>1</subscript></entry>
+ <entry>y<subscript>0</subscript></entry>
+ <entry>u<subscript>7</subscript></entry>
+ <entry>u<subscript>6</subscript></entry>
+ <entry>u<subscript>5</subscript></entry>
+ <entry>u<subscript>4</subscript></entry>
+ <entry>u<subscript>3</subscript></entry>
+ <entry>u<subscript>2</subscript></entry>
+ <entry>u<subscript>1</subscript></entry>
+ <entry>u<subscript>0</subscript></entry>
+ <entry>v<subscript>7</subscript></entry>
+ <entry>v<subscript>6</subscript></entry>
+ <entry>v<subscript>5</subscript></entry>
+ <entry>v<subscript>4</subscript></entry>
+ <entry>v<subscript>3</subscript></entry>
+ <entry>v<subscript>2</subscript></entry>
+ <entry>v<subscript>1</subscript></entry>
+ <entry>v<subscript>0</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </section>
+
+ <section>
+ <title>HSV/HSL Formats</title>
+
+ <para>Those formats transfer pixel data as RGB values in a cylindrical-coordinate
+ system using Hue-Saturation-Value or Hue-Saturation-Lightness components. The
+ format code is made of the following information.
+ <itemizedlist>
+ <listitem><para>The hue, saturation, value or lightness and optional alpha
+ components order code, as encoded in a pixel sample. The only currently
+ supported value is AHSV.
+ </para></listitem>
+ <listitem><para>The number of bits per component, for each component. The values
+ can be different for all components. The only currently supported value is 8888.
+ </para></listitem>
+ <listitem><para>The number of bus samples per pixel. Pixels that are wider than
+ the bus width must be transferred in multiple samples. The only currently
+ supported value is 1.</para></listitem>
+ <listitem><para>The bus width.</para></listitem>
+ <listitem><para>For formats where the total number of bits per pixel is smaller
+ than the number of bus samples per pixel times the bus width, a padding
+ value stating if the bytes are padded in their most high order bits
+ (PADHI) or low order bits (PADLO).</para></listitem>
+ <listitem><para>For formats where the number of bus samples per pixel is larger
+ than 1, an endianness value stating if the pixel is transferred MSB first
+ (BE) or LSB first (LE).</para></listitem>
+ </itemizedlist>
+ </para>
+
+ <para>The following table lists existing HSV/HSL formats.</para>
+
+ <table pgwide="0" frame="none" id="v4l2-mbus-pixelcode-hsv">
+ <title>HSV/HSL formats</title>
+ <tgroup cols="27">
+ <colspec colname="id" align="left" />
+ <colspec colname="code" align="center"/>
+ <colspec colname="bit" />
+ <colspec colnum="4" colname="b31" align="center" />
+ <colspec colnum="5" colname="b20" align="center" />
+ <colspec colnum="6" colname="b29" align="center" />
+ <colspec colnum="7" colname="b28" align="center" />
+ <colspec colnum="8" colname="b27" align="center" />
+ <colspec colnum="9" colname="b26" align="center" />
+ <colspec colnum="10" colname="b25" align="center" />
+ <colspec colnum="11" colname="b24" align="center" />
+ <colspec colnum="12" colname="b23" align="center" />
+ <colspec colnum="13" colname="b22" align="center" />
+ <colspec colnum="14" colname="b21" align="center" />
+ <colspec colnum="15" colname="b20" align="center" />
+ <colspec colnum="16" colname="b19" align="center" />
+ <colspec colnum="17" colname="b18" align="center" />
+ <colspec colnum="18" colname="b17" align="center" />
+ <colspec colnum="19" colname="b16" align="center" />
+ <colspec colnum="20" colname="b15" align="center" />
+ <colspec colnum="21" colname="b14" align="center" />
+ <colspec colnum="22" colname="b13" align="center" />
+ <colspec colnum="23" colname="b12" align="center" />
+ <colspec colnum="24" colname="b11" align="center" />
+ <colspec colnum="25" colname="b10" align="center" />
+ <colspec colnum="26" colname="b09" align="center" />
+ <colspec colnum="27" colname="b08" align="center" />
+ <colspec colnum="28" colname="b07" align="center" />
+ <colspec colnum="29" colname="b06" align="center" />
+ <colspec colnum="30" colname="b05" align="center" />
+ <colspec colnum="31" colname="b04" align="center" />
+ <colspec colnum="32" colname="b03" align="center" />
+ <colspec colnum="33" colname="b02" align="center" />
+ <colspec colnum="34" colname="b01" align="center" />
+ <colspec colnum="35" colname="b00" align="center" />
+ <spanspec namest="b31" nameend="b00" spanname="b0" />
+ <thead>
+ <row>
+ <entry>Identifier</entry>
+ <entry>Code</entry>
+ <entry></entry>
+ <entry spanname="b0">Data organization</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry>Bit</entry>
+ <entry>31</entry>
+ <entry>30</entry>
+ <entry>29</entry>
+ <entry>28</entry>
+ <entry>27</entry>
+ <entry>26</entry>
+ <entry>25</entry>
+ <entry>24</entry>
+ <entry>23</entry>
+ <entry>22</entry>
+ <entry>21</entry>
+ <entry>20</entry>
+ <entry>19</entry>
+ <entry>18</entry>
+ <entry>17</entry>
+ <entry>16</entry>
+ <entry>15</entry>
+ <entry>14</entry>
+ <entry>13</entry>
+ <entry>12</entry>
+ <entry>11</entry>
+ <entry>10</entry>
+ <entry>9</entry>
+ <entry>8</entry>
+ <entry>7</entry>
+ <entry>6</entry>
+ <entry>5</entry>
+ <entry>4</entry>
+ <entry>3</entry>
+ <entry>2</entry>
+ <entry>1</entry>
+ <entry>0</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row id="MEDIA-BUS-FMT-AHSV8888-1X32">
+ <entry>MEDIA_BUS_FMT_AHSV8888_1X32</entry>
+ <entry>0x6001</entry>
+ <entry></entry>
+ <entry>a<subscript>7</subscript></entry>
+ <entry>a<subscript>6</subscript></entry>
+ <entry>a<subscript>5</subscript></entry>
+ <entry>a<subscript>4</subscript></entry>
+ <entry>a<subscript>3</subscript></entry>
+ <entry>a<subscript>2</subscript></entry>
+ <entry>a<subscript>1</subscript></entry>
+ <entry>a<subscript>0</subscript></entry>
+ <entry>h<subscript>7</subscript></entry>
+ <entry>h<subscript>6</subscript></entry>
+ <entry>h<subscript>5</subscript></entry>
+ <entry>h<subscript>4</subscript></entry>
+ <entry>h<subscript>3</subscript></entry>
+ <entry>h<subscript>2</subscript></entry>
+ <entry>h<subscript>1</subscript></entry>
+ <entry>h<subscript>0</subscript></entry>
+ <entry>s<subscript>7</subscript></entry>
+ <entry>s<subscript>6</subscript></entry>
+ <entry>s<subscript>5</subscript></entry>
+ <entry>s<subscript>4</subscript></entry>
+ <entry>s<subscript>3</subscript></entry>
+ <entry>s<subscript>2</subscript></entry>
+ <entry>s<subscript>1</subscript></entry>
+ <entry>s<subscript>0</subscript></entry>
+ <entry>v<subscript>7</subscript></entry>
+ <entry>v<subscript>6</subscript></entry>
+ <entry>v<subscript>5</subscript></entry>
+ <entry>v<subscript>4</subscript></entry>
+ <entry>v<subscript>3</subscript></entry>
+ <entry>v<subscript>2</subscript></entry>
+ <entry>v<subscript>1</subscript></entry>
+ <entry>v<subscript>0</subscript></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </section>
+
+ <section>
+ <title>JPEG Compressed Formats</title>
+
+ <para>Those data formats consist of an ordered sequence of 8-bit bytes
+ obtained from JPEG compression process. Additionally to the
+ <constant>_JPEG</constant> postfix the format code is made of
+ the following information.
+ <itemizedlist>
+ <listitem><para>The number of bus samples per entropy encoded byte.</para></listitem>
+ <listitem><para>The bus width.</para></listitem>
+ </itemizedlist>
+ </para>
+
+ <para>For instance, for a JPEG baseline process and an 8-bit bus width
+ the format will be named <constant>MEDIA_BUS_FMT_JPEG_1X8</constant>.
+ </para>
+
+ <para>The following table lists existing JPEG compressed formats.</para>
+
+ <table pgwide="0" frame="none" id="v4l2-mbus-pixelcode-jpeg">
+ <title>JPEG Formats</title>
+ <tgroup cols="3">
+ <colspec colname="id" align="left" />
+ <colspec colname="code" align="left"/>
+ <colspec colname="remarks" align="left"/>
+ <thead>
+ <row>
+ <entry>Identifier</entry>
+ <entry>Code</entry>
+ <entry>Remarks</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row id="MEDIA-BUS-FMT-JPEG-1X8">
+ <entry>MEDIA_BUS_FMT_JPEG_1X8</entry>
+ <entry>0x4001</entry>
+ <entry>Besides of its usage for the parallel bus this format is
+ recommended for transmission of JPEG data over MIPI CSI bus
+ using the User Defined 8-bit Data types.
+ </entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </section>
+
+ <section id="v4l2-mbus-vendor-spec-fmts">
+ <title>Vendor and Device Specific Formats</title>
+
+ <note>
+ <title>Experimental</title>
+ <para>This is an <link linkend="experimental">experimental</link>
+interface and may change in the future.</para>
+ </note>
+
+ <para>This section lists complex data formats that are either vendor or
+ device specific.
+ </para>
+
+ <para>The following table lists the existing vendor and device specific
+ formats.</para>
+
+ <table pgwide="0" frame="none" id="v4l2-mbus-pixelcode-vendor-specific">
+ <title>Vendor and device specific formats</title>
+ <tgroup cols="3">
+ <colspec colname="id" align="left" />
+ <colspec colname="code" align="left"/>
+ <colspec colname="remarks" align="left"/>
+ <thead>
+ <row>
+ <entry>Identifier</entry>
+ <entry>Code</entry>
+ <entry>Comments</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row id="MEDIA-BUS-FMT-S5C-UYVY-JPEG-1X8">
+ <entry>MEDIA_BUS_FMT_S5C_UYVY_JPEG_1X8</entry>
+ <entry>0x5001</entry>
+ <entry>
+ Interleaved raw UYVY and JPEG image format with embedded
+ meta-data used by Samsung S3C73MX camera sensors.
+ </entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </section>
+
+ </section>
+</section>
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diff --git a/Documentation/DocBook/media/v4l/subdev-image-processing-full.dia b/Documentation/DocBook/media/v4l/subdev-image-processing-full.dia
new file mode 100644
index 000000000..a0d782927
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/subdev-image-processing-full.dia
@@ -0,0 +1,1588 @@
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diff --git a/Documentation/DocBook/media/v4l/subdev-image-processing-scaling-multi-source.dia b/Documentation/DocBook/media/v4l/subdev-image-processing-scaling-multi-source.dia
new file mode 100644
index 000000000..0cd50a7bd
--- /dev/null
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diff --git a/Documentation/DocBook/media/v4l/v4l2.xml b/Documentation/DocBook/media/v4l/v4l2.xml
new file mode 100644
index 000000000..e98caa1c3
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/v4l2.xml
@@ -0,0 +1,709 @@
+ <partinfo>
+ <authorgroup>
+ <author>
+ <firstname>Michael</firstname>
+ <surname>Schimek</surname>
+ <othername role="mi">H</othername>
+ <affiliation>
+ <address>
+ <email>mschimek@gmx.at</email>
+ </address>
+ </affiliation>
+ </author>
+
+ <author>
+ <firstname>Bill</firstname>
+ <surname>Dirks</surname>
+ <!-- Commented until Bill opts in to be spammed.
+ <affiliation>
+ <address>
+ <email>bill@thedirks.org</email>
+ </address>
+ </affiliation> -->
+ <contrib>Original author of the V4L2 API and
+documentation.</contrib>
+ </author>
+
+ <author>
+ <firstname>Hans</firstname>
+ <surname>Verkuil</surname>
+ <contrib>Designed and documented the VIDIOC_LOG_STATUS ioctl,
+the extended control ioctls, major parts of the sliced VBI API, the
+MPEG encoder and decoder APIs and the DV Timings API.</contrib>
+ <affiliation>
+ <address>
+ <email>hverkuil@xs4all.nl</email>
+ </address>
+ </affiliation>
+ </author>
+
+ <author>
+ <firstname>Martin</firstname>
+ <surname>Rubli</surname>
+ <!--
+ <affiliation>
+ <address>
+ <email>martin_rubli@logitech.com</email>
+ </address>
+ </affiliation> -->
+ <contrib>Designed and documented the VIDIOC_ENUM_FRAMESIZES
+and VIDIOC_ENUM_FRAMEINTERVALS ioctls.</contrib>
+ </author>
+
+ <author>
+ <firstname>Andy</firstname>
+ <surname>Walls</surname>
+ <contrib>Documented the fielded V4L2_MPEG_STREAM_VBI_FMT_IVTV
+MPEG stream embedded, sliced VBI data format in this specification.
+</contrib>
+ <affiliation>
+ <address>
+ <email>awalls@md.metrocast.net</email>
+ </address>
+ </affiliation>
+ </author>
+
+ <author>
+ <firstname>Mauro</firstname>
+ <surname>Carvalho Chehab</surname>
+ <contrib>Documented libv4l, designed and added v4l2grab example,
+Remote Controller chapter.</contrib>
+ <affiliation>
+ <address>
+ <email>m.chehab@samsung.com</email>
+ </address>
+ </affiliation>
+ </author>
+
+ <author>
+ <firstname>Muralidharan</firstname>
+ <surname>Karicheri</surname>
+ <contrib>Documented the Digital Video timings API.</contrib>
+ <affiliation>
+ <address>
+ <email>m-karicheri2@ti.com</email>
+ </address>
+ </affiliation>
+ </author>
+
+ <author>
+ <firstname>Pawel</firstname>
+ <surname>Osciak</surname>
+ <contrib>Designed and documented the multi-planar API.</contrib>
+ <affiliation>
+ <address>
+ <email>pawel AT osciak.com</email>
+ </address>
+ </affiliation>
+ </author>
+
+ <author>
+ <firstname>Sakari</firstname>
+ <surname>Ailus</surname>
+ <contrib>Subdev selections API.</contrib>
+ <affiliation>
+ <address>
+ <email>sakari.ailus@iki.fi</email>
+ </address>
+ </affiliation>
+ </author>
+ <author>
+ <firstname>Antti</firstname>
+ <surname>Palosaari</surname>
+ <contrib>SDR API.</contrib>
+ <affiliation>
+ <address>
+ <email>crope@iki.fi</email>
+ </address>
+ </affiliation>
+ </author>
+ </authorgroup>
+
+ <copyright>
+ <year>1999</year>
+ <year>2000</year>
+ <year>2001</year>
+ <year>2002</year>
+ <year>2003</year>
+ <year>2004</year>
+ <year>2005</year>
+ <year>2006</year>
+ <year>2007</year>
+ <year>2008</year>
+ <year>2009</year>
+ <year>2010</year>
+ <year>2011</year>
+ <year>2012</year>
+ <year>2013</year>
+ <year>2014</year>
+ <year>2015</year>
+ <holder>Bill Dirks, Michael H. Schimek, Hans Verkuil, Martin
+Rubli, Andy Walls, Muralidharan Karicheri, Mauro Carvalho Chehab,
+ Pawel Osciak</holder>
+ </copyright>
+ <legalnotice>
+ <para>Except when explicitly stated as GPL, programming examples within
+ this part can be used and distributed without restrictions.</para>
+ </legalnotice>
+ <revhistory>
+ <!-- Put document revisions here, newest first. -->
+ <!-- API revisions (changes and additions of defines, enums,
+structs, ioctls) must be noted in more detail in the history chapter
+(compat.xml), along with the possible impact on existing drivers and
+applications. -->
+
+ <revision>
+ <revnumber>3.21</revnumber>
+ <date>2015-02-13</date>
+ <authorinitials>mcc</authorinitials>
+ <revremark>Fix documentation for media controller device nodes and add support for DVB device nodes.
+Add support for Tuner sub-device.
+ </revremark>
+ </revision>
+ <revision>
+ <revnumber>3.19</revnumber>
+ <date>2014-12-05</date>
+ <authorinitials>hv</authorinitials>
+ <revremark>Rewrote Colorspace chapter, added new &v4l2-ycbcr-encoding; and &v4l2-quantization; fields
+to &v4l2-pix-format;, &v4l2-pix-format-mplane; and &v4l2-mbus-framefmt;.
+ </revremark>
+ </revision>
+
+ <revision>
+ <revnumber>3.17</revnumber>
+ <date>2014-08-04</date>
+ <authorinitials>lp, hv</authorinitials>
+ <revremark>Extended &v4l2-pix-format;. Added format flags. Added compound control types
+and VIDIOC_QUERY_EXT_CTRL.
+ </revremark>
+ </revision>
+
+ <revision>
+ <revnumber>3.15</revnumber>
+ <date>2014-02-03</date>
+ <authorinitials>hv, ap</authorinitials>
+ <revremark>Update several sections of "Common API Elements": "Opening and Closing Devices"
+"Querying Capabilities", "Application Priority", "Video Inputs and Outputs", "Audio Inputs and Outputs"
+"Tuners and Modulators", "Video Standards" and "Digital Video (DV) Timings". Added SDR API.
+ </revremark>
+ </revision>
+
+ <revision>
+ <revnumber>3.14</revnumber>
+ <date>2013-11-25</date>
+ <authorinitials>rr</authorinitials>
+ <revremark>Set width and height as unsigned on v4l2_rect.
+ </revremark>
+ </revision>
+
+ <revision>
+ <revnumber>3.11</revnumber>
+ <date>2013-05-26</date>
+ <authorinitials>hv</authorinitials>
+ <revremark>Remove obsolete VIDIOC_DBG_G_CHIP_IDENT ioctl.
+ </revremark>
+ </revision>
+
+ <revision>
+ <revnumber>3.10</revnumber>
+ <date>2013-03-25</date>
+ <authorinitials>hv</authorinitials>
+ <revremark>Remove obsolete and unused DV_PRESET ioctls:
+ VIDIOC_G_DV_PRESET, VIDIOC_S_DV_PRESET, VIDIOC_QUERY_DV_PRESET and
+ VIDIOC_ENUM_DV_PRESET. Remove the related v4l2_input/output capability
+ flags V4L2_IN_CAP_PRESETS and V4L2_OUT_CAP_PRESETS. Added VIDIOC_DBG_G_CHIP_INFO.
+ </revremark>
+ </revision>
+
+ <revision>
+ <revnumber>3.9</revnumber>
+ <date>2012-12-03</date>
+ <authorinitials>sa, sn</authorinitials>
+ <revremark>Added timestamp types to v4l2_buffer.
+ Added V4L2_EVENT_CTRL_CH_RANGE control event changes flag.
+ </revremark>
+ </revision>
+
+ <revision>
+ <revnumber>3.6</revnumber>
+ <date>2012-07-02</date>
+ <authorinitials>hv</authorinitials>
+ <revremark>Added VIDIOC_ENUM_FREQ_BANDS.
+ </revremark>
+ </revision>
+
+ <revision>
+ <revnumber>3.5</revnumber>
+ <date>2012-05-07</date>
+ <authorinitials>sa, sn, hv</authorinitials>
+ <revremark>Added V4L2_CTRL_TYPE_INTEGER_MENU and V4L2 subdev
+ selections API. Improved the description of V4L2_CID_COLORFX
+ control, added V4L2_CID_COLORFX_CBCR control.
+ Added camera controls V4L2_CID_AUTO_EXPOSURE_BIAS,
+ V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE, V4L2_CID_IMAGE_STABILIZATION,
+ V4L2_CID_ISO_SENSITIVITY, V4L2_CID_ISO_SENSITIVITY_AUTO,
+ V4L2_CID_EXPOSURE_METERING, V4L2_CID_SCENE_MODE,
+ V4L2_CID_3A_LOCK, V4L2_CID_AUTO_FOCUS_START,
+ V4L2_CID_AUTO_FOCUS_STOP, V4L2_CID_AUTO_FOCUS_STATUS
+ and V4L2_CID_AUTO_FOCUS_RANGE.
+ Added VIDIOC_ENUM_DV_TIMINGS, VIDIOC_QUERY_DV_TIMINGS and
+ VIDIOC_DV_TIMINGS_CAP.
+ </revremark>
+ </revision>
+
+ <revision>
+ <revnumber>3.4</revnumber>
+ <date>2012-01-25</date>
+ <authorinitials>sn</authorinitials>
+ <revremark>Added <link linkend="jpeg-controls">JPEG compression
+ control class.</link>
+ </revremark>
+ </revision>
+
+ <revision>
+ <revnumber>3.3</revnumber>
+ <date>2012-01-11</date>
+ <authorinitials>hv</authorinitials>
+ <revremark>Added device_caps field to struct v4l2_capabilities.</revremark>
+ </revision>
+
+ <revision>
+ <revnumber>3.2</revnumber>
+ <date>2011-08-26</date>
+ <authorinitials>hv</authorinitials>
+ <revremark>Added V4L2_CTRL_FLAG_VOLATILE.</revremark>
+ </revision>
+
+ <revision>
+ <revnumber>3.1</revnumber>
+ <date>2011-06-27</date>
+ <authorinitials>mcc, po, hv</authorinitials>
+ <revremark>Documented that VIDIOC_QUERYCAP now returns a per-subsystem version instead of a per-driver one.
+ Standardize an error code for invalid ioctl.
+ Added V4L2_CTRL_TYPE_BITMASK.</revremark>
+ </revision>
+
+ <revision>
+ <revnumber>2.6.39</revnumber>
+ <date>2011-03-01</date>
+ <authorinitials>mcc, po</authorinitials>
+ <revremark>Removed VIDIOC_*_OLD from videodev2.h header and update it to reflect latest changes. Added the <link linkend="planar-apis">multi-planar API</link>.</revremark>
+ </revision>
+
+ <revision>
+ <revnumber>2.6.37</revnumber>
+ <date>2010-08-06</date>
+ <authorinitials>hv</authorinitials>
+ <revremark>Removed obsolete vtx (videotext) API.</revremark>
+ </revision>
+
+ <revision>
+ <revnumber>2.6.33</revnumber>
+ <date>2009-12-03</date>
+ <authorinitials>mk</authorinitials>
+ <revremark>Added documentation for the Digital Video timings API.</revremark>
+ </revision>
+
+ <revision>
+ <revnumber>2.6.32</revnumber>
+ <date>2009-08-31</date>
+ <authorinitials>mcc</authorinitials>
+ <revremark>Now, revisions will match the kernel version where
+the V4L2 API changes will be used by the Linux Kernel.
+Also added Remote Controller chapter.</revremark>
+ </revision>
+
+ <revision>
+ <revnumber>0.29</revnumber>
+ <date>2009-08-26</date>
+ <authorinitials>ev</authorinitials>
+ <revremark>Added documentation for string controls and for FM Transmitter controls.</revremark>
+ </revision>
+
+ <revision>
+ <revnumber>0.28</revnumber>
+ <date>2009-08-26</date>
+ <authorinitials>gl</authorinitials>
+ <revremark>Added V4L2_CID_BAND_STOP_FILTER documentation.</revremark>
+ </revision>
+
+ <revision>
+ <revnumber>0.27</revnumber>
+ <date>2009-08-15</date>
+ <authorinitials>mcc</authorinitials>
+ <revremark>Added libv4l and Remote Controller documentation;
+added v4l2grab and keytable application examples.</revremark>
+ </revision>
+
+ <revision>
+ <revnumber>0.26</revnumber>
+ <date>2009-07-23</date>
+ <authorinitials>hv</authorinitials>
+ <revremark>Finalized the RDS capture API. Added modulator and RDS encoder
+capabilities. Added support for string controls.</revremark>
+ </revision>
+
+ <revision>
+ <revnumber>0.25</revnumber>
+ <date>2009-01-18</date>
+ <authorinitials>hv</authorinitials>
+ <revremark>Added pixel formats VYUY, NV16 and NV61, and changed
+the debug ioctls VIDIOC_DBG_G/S_REGISTER and VIDIOC_DBG_G_CHIP_IDENT.
+Added camera controls V4L2_CID_ZOOM_ABSOLUTE, V4L2_CID_ZOOM_RELATIVE,
+V4L2_CID_ZOOM_CONTINUOUS and V4L2_CID_PRIVACY.</revremark>
+ </revision>
+
+ <revision>
+ <revnumber>0.24</revnumber>
+ <date>2008-03-04</date>
+ <authorinitials>mhs</authorinitials>
+ <revremark>Added pixel formats Y16 and SBGGR16, new controls
+and a camera controls class. Removed VIDIOC_G/S_MPEGCOMP.</revremark>
+ </revision>
+
+ <revision>
+ <revnumber>0.23</revnumber>
+ <date>2007-08-30</date>
+ <authorinitials>mhs</authorinitials>
+ <revremark>Fixed a typo in VIDIOC_DBG_G/S_REGISTER.
+Clarified the byte order of packed pixel formats.</revremark>
+ </revision>
+
+ <revision>
+ <revnumber>0.22</revnumber>
+ <date>2007-08-29</date>
+ <authorinitials>mhs</authorinitials>
+ <revremark>Added the Video Output Overlay interface, new MPEG
+controls, V4L2_FIELD_INTERLACED_TB and V4L2_FIELD_INTERLACED_BT,
+VIDIOC_DBG_G/S_REGISTER, VIDIOC_(TRY_)ENCODER_CMD,
+VIDIOC_G_CHIP_IDENT, VIDIOC_G_ENC_INDEX, new pixel formats.
+Clarifications in the cropping chapter, about RGB pixel formats, the
+mmap(), poll(), select(), read() and write() functions. Typographical
+fixes.</revremark>
+ </revision>
+
+ <revision>
+ <revnumber>0.21</revnumber>
+ <date>2006-12-19</date>
+ <authorinitials>mhs</authorinitials>
+ <revremark>Fixed a link in the VIDIOC_G_EXT_CTRLS section.</revremark>
+ </revision>
+
+ <revision>
+ <revnumber>0.20</revnumber>
+ <date>2006-11-24</date>
+ <authorinitials>mhs</authorinitials>
+ <revremark>Clarified the purpose of the audioset field in
+struct v4l2_input and v4l2_output.</revremark>
+ </revision>
+
+ <revision>
+ <revnumber>0.19</revnumber>
+ <date>2006-10-19</date>
+ <authorinitials>mhs</authorinitials>
+ <revremark>Documented V4L2_PIX_FMT_RGB444.</revremark>
+ </revision>
+
+ <revision>
+ <revnumber>0.18</revnumber>
+ <date>2006-10-18</date>
+ <authorinitials>mhs</authorinitials>
+ <revremark>Added the description of extended controls by Hans
+Verkuil. Linked V4L2_PIX_FMT_MPEG to V4L2_CID_MPEG_STREAM_TYPE.</revremark>
+ </revision>
+
+ <revision>
+ <revnumber>0.17</revnumber>
+ <date>2006-10-12</date>
+ <authorinitials>mhs</authorinitials>
+ <revremark>Corrected V4L2_PIX_FMT_HM12 description.</revremark>
+ </revision>
+
+ <revision>
+ <revnumber>0.16</revnumber>
+ <date>2006-10-08</date>
+ <authorinitials>mhs</authorinitials>
+ <revremark>VIDIOC_ENUM_FRAMESIZES and
+VIDIOC_ENUM_FRAMEINTERVALS are now part of the API.</revremark>
+ </revision>
+
+ <revision>
+ <revnumber>0.15</revnumber>
+ <date>2006-09-23</date>
+ <authorinitials>mhs</authorinitials>
+ <revremark>Cleaned up the bibliography, added BT.653 and
+BT.1119. capture.c/start_capturing() for user pointer I/O did not
+initialize the buffer index. Documented the V4L MPEG and MJPEG
+VID_TYPEs and V4L2_PIX_FMT_SBGGR8. Updated the list of reserved pixel
+formats. See the history chapter for API changes.</revremark>
+ </revision>
+
+ <revision>
+ <revnumber>0.14</revnumber>
+ <date>2006-09-14</date>
+ <authorinitials>mr</authorinitials>
+ <revremark>Added VIDIOC_ENUM_FRAMESIZES and
+VIDIOC_ENUM_FRAMEINTERVALS proposal for frame format enumeration of
+digital devices.</revremark>
+ </revision>
+
+ <revision>
+ <revnumber>0.13</revnumber>
+ <date>2006-04-07</date>
+ <authorinitials>mhs</authorinitials>
+ <revremark>Corrected the description of struct v4l2_window
+clips. New V4L2_STD_ and V4L2_TUNER_MODE_LANG1_LANG2
+defines.</revremark>
+ </revision>
+
+ <revision>
+ <revnumber>0.12</revnumber>
+ <date>2006-02-03</date>
+ <authorinitials>mhs</authorinitials>
+ <revremark>Corrected the description of struct
+v4l2_captureparm and v4l2_outputparm.</revremark>
+ </revision>
+
+ <revision>
+ <revnumber>0.11</revnumber>
+ <date>2006-01-27</date>
+ <authorinitials>mhs</authorinitials>
+ <revremark>Improved the description of struct
+v4l2_tuner.</revremark>
+ </revision>
+
+ <revision>
+ <revnumber>0.10</revnumber>
+ <date>2006-01-10</date>
+ <authorinitials>mhs</authorinitials>
+ <revremark>VIDIOC_G_INPUT and VIDIOC_S_PARM
+clarifications.</revremark>
+ </revision>
+
+ <revision>
+ <revnumber>0.9</revnumber>
+ <date>2005-11-27</date>
+ <authorinitials>mhs</authorinitials>
+ <revremark>Improved the 525 line numbering diagram. Hans
+Verkuil and I rewrote the sliced VBI section. He also contributed a
+VIDIOC_LOG_STATUS page. Fixed VIDIOC_S_STD call in the video standard
+selection example. Various updates.</revremark>
+ </revision>
+
+ <revision>
+ <revnumber>0.8</revnumber>
+ <date>2004-10-04</date>
+ <authorinitials>mhs</authorinitials>
+ <revremark>Somehow a piece of junk slipped into the capture
+example, removed.</revremark>
+ </revision>
+
+ <revision>
+ <revnumber>0.7</revnumber>
+ <date>2004-09-19</date>
+ <authorinitials>mhs</authorinitials>
+ <revremark>Fixed video standard selection, control
+enumeration, downscaling and aspect example. Added read and user
+pointer i/o to video capture example.</revremark>
+ </revision>
+
+ <revision>
+ <revnumber>0.6</revnumber>
+ <date>2004-08-01</date>
+ <authorinitials>mhs</authorinitials>
+ <revremark>v4l2_buffer changes, added video capture example,
+various corrections.</revremark>
+ </revision>
+
+ <revision>
+ <revnumber>0.5</revnumber>
+ <date>2003-11-05</date>
+ <authorinitials>mhs</authorinitials>
+ <revremark>Pixel format erratum.</revremark>
+ </revision>
+
+ <revision>
+ <revnumber>0.4</revnumber>
+ <date>2003-09-17</date>
+ <authorinitials>mhs</authorinitials>
+ <revremark>Corrected source and Makefile to generate a PDF.
+SGML fixes. Added latest API changes. Closed gaps in the history
+chapter.</revremark>
+ </revision>
+
+ <revision>
+ <revnumber>0.3</revnumber>
+ <date>2003-02-05</date>
+ <authorinitials>mhs</authorinitials>
+ <revremark>Another draft, more corrections.</revremark>
+ </revision>
+
+ <revision>
+ <revnumber>0.2</revnumber>
+ <date>2003-01-15</date>
+ <authorinitials>mhs</authorinitials>
+ <revremark>Second draft, with corrections pointed out by Gerd
+Knorr.</revremark>
+ </revision>
+
+ <revision>
+ <revnumber>0.1</revnumber>
+ <date>2002-12-01</date>
+ <authorinitials>mhs</authorinitials>
+ <revremark>First draft, based on documentation by Bill Dirks
+and discussions on the V4L mailing list.</revremark>
+ </revision>
+ </revhistory>
+</partinfo>
+
+<title>Video for Linux Two API Specification</title>
+ <subtitle>Revision 3.19</subtitle>
+
+ <chapter id="common">
+ &sub-common;
+ </chapter>
+
+ <chapter id="pixfmt">
+ &sub-pixfmt;
+ </chapter>
+
+ <chapter id="io">
+ &sub-io;
+ </chapter>
+
+ <chapter id="devices">
+ <title>Interfaces</title>
+
+ <section id="capture"> &sub-dev-capture; </section>
+ <section id="overlay"> &sub-dev-overlay; </section>
+ <section id="output"> &sub-dev-output; </section>
+ <section id="osd"> &sub-dev-osd; </section>
+ <section id="codec"> &sub-dev-codec; </section>
+ <section id="effect"> &sub-dev-effect; </section>
+ <section id="raw-vbi"> &sub-dev-raw-vbi; </section>
+ <section id="sliced"> &sub-dev-sliced-vbi; </section>
+ <section id="ttx"> &sub-dev-teletext; </section>
+ <section id="radio"> &sub-dev-radio; </section>
+ <section id="rds"> &sub-dev-rds; </section>
+ <section id="sdr"> &sub-dev-sdr; </section>
+ <section id="event"> &sub-dev-event; </section>
+ <section id="subdev"> &sub-dev-subdev; </section>
+ </chapter>
+
+ <chapter id="driver">
+ &sub-driver;
+ </chapter>
+
+ <chapter id="libv4l">
+ &sub-libv4l;
+ </chapter>
+
+ <chapter id="compat">
+ &sub-compat;
+ </chapter>
+
+ <appendix id="user-func">
+ <title>Function Reference</title>
+
+ <!-- Keep this alphabetically sorted. -->
+
+ &sub-close;
+ &sub-ioctl;
+ <!-- All ioctls go here. -->
+ &sub-create-bufs;
+ &sub-cropcap;
+ &sub-dbg-g-chip-info;
+ &sub-dbg-g-register;
+ &sub-decoder-cmd;
+ &sub-dqevent;
+ &sub-dv-timings-cap;
+ &sub-encoder-cmd;
+ &sub-enumaudio;
+ &sub-enumaudioout;
+ &sub-enum-dv-timings;
+ &sub-enum-fmt;
+ &sub-enum-framesizes;
+ &sub-enum-frameintervals;
+ &sub-enum-freq-bands;
+ &sub-enuminput;
+ &sub-enumoutput;
+ &sub-enumstd;
+ &sub-expbuf;
+ &sub-g-audio;
+ &sub-g-audioout;
+ &sub-g-crop;
+ &sub-g-ctrl;
+ &sub-g-dv-timings;
+ &sub-g-edid;
+ &sub-g-enc-index;
+ &sub-g-ext-ctrls;
+ &sub-g-fbuf;
+ &sub-g-fmt;
+ &sub-g-frequency;
+ &sub-g-input;
+ &sub-g-jpegcomp;
+ &sub-g-modulator;
+ &sub-g-output;
+ &sub-g-parm;
+ &sub-g-priority;
+ &sub-g-selection;
+ &sub-g-sliced-vbi-cap;
+ &sub-g-std;
+ &sub-g-tuner;
+ &sub-log-status;
+ &sub-overlay;
+ &sub-prepare-buf;
+ &sub-qbuf;
+ &sub-querybuf;
+ &sub-querycap;
+ &sub-queryctrl;
+ &sub-query-dv-timings;
+ &sub-querystd;
+ &sub-reqbufs;
+ &sub-s-hw-freq-seek;
+ &sub-streamon;
+ &sub-subdev-enum-frame-interval;
+ &sub-subdev-enum-frame-size;
+ &sub-subdev-enum-mbus-code;
+ &sub-subdev-g-crop;
+ &sub-subdev-g-fmt;
+ &sub-subdev-g-frame-interval;
+ &sub-subdev-g-selection;
+ &sub-subscribe-event;
+ <!-- End of ioctls. -->
+ &sub-mmap;
+ &sub-munmap;
+ &sub-open;
+ &sub-poll;
+ &sub-read;
+ &sub-select;
+ &sub-write;
+ </appendix>
+
+ <appendix>
+ <title>Common definitions for V4L2 and V4L2 subdev interfaces</title>
+ &sub-selections-common;
+ </appendix>
+
+ <appendix id="videodev">
+ <title>Video For Linux Two Header File</title>
+ &sub-videodev2-h;
+ </appendix>
+
+ <appendix id="capture-example">
+ <title>Video Capture Example</title>
+ &sub-capture-c;
+ </appendix>
+
+ <appendix id="v4l2grab-example">
+ <title>Video Grabber example using libv4l</title>
+ <para>This program demonstrates how to grab V4L2 images in ppm format by
+using libv4l handlers. The advantage is that this grabber can potentially work
+with any V4L2 driver.</para>
+ &sub-v4l2grab-c;
+ </appendix>
+
+ &sub-media-indices;
+
+ &sub-biblio;
+
diff --git a/Documentation/DocBook/media/v4l/v4l2grab.c.xml b/Documentation/DocBook/media/v4l/v4l2grab.c.xml
new file mode 100644
index 000000000..bed12e40b
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/v4l2grab.c.xml
@@ -0,0 +1,164 @@
+<programlisting>
+/* V4L2 video picture grabber
+ Copyright (C) 2009 Mauro Carvalho Chehab &lt;mchehab@infradead.org&gt;
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation version 2 of the License.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+ */
+
+#include &lt;stdio.h&gt;
+#include &lt;stdlib.h&gt;
+#include &lt;string.h&gt;
+#include &lt;fcntl.h&gt;
+#include &lt;errno.h&gt;
+#include &lt;sys/ioctl.h&gt;
+#include &lt;sys/types.h&gt;
+#include &lt;sys/time.h&gt;
+#include &lt;sys/mman.h&gt;
+#include &lt;linux/videodev2.h&gt;
+#include "../libv4l/include/libv4l2.h"
+
+#define CLEAR(x) memset(&amp;(x), 0, sizeof(x))
+
+struct buffer {
+ void *start;
+ size_t length;
+};
+
+static void xioctl(int fh, int request, void *arg)
+{
+ int r;
+
+ do {
+ r = v4l2_ioctl(fh, request, arg);
+ } while (r == -1 &amp;&amp; ((errno == EINTR) || (errno == EAGAIN)));
+
+ if (r == -1) {
+ fprintf(stderr, "error %d, %s\n", errno, strerror(errno));
+ exit(EXIT_FAILURE);
+ }
+}
+
+int main(int argc, char **argv)
+{
+ struct <link linkend="v4l2-format">v4l2_format</link> fmt;
+ struct <link linkend="v4l2-buffer">v4l2_buffer</link> buf;
+ struct <link linkend="v4l2-requestbuffers">v4l2_requestbuffers</link> req;
+ enum <link linkend="v4l2-buf-type">v4l2_buf_type</link> type;
+ fd_set fds;
+ struct timeval tv;
+ int r, fd = -1;
+ unsigned int i, n_buffers;
+ char *dev_name = "/dev/video0";
+ char out_name[256];
+ FILE *fout;
+ struct buffer *buffers;
+
+ fd = v4l2_open(dev_name, O_RDWR | O_NONBLOCK, 0);
+ if (fd &lt; 0) {
+ perror("Cannot open device");
+ exit(EXIT_FAILURE);
+ }
+
+ CLEAR(fmt);
+ fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ fmt.fmt.pix.width = 640;
+ fmt.fmt.pix.height = 480;
+ fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_RGB24;
+ fmt.fmt.pix.field = V4L2_FIELD_INTERLACED;
+ xioctl(fd, VIDIOC_S_FMT, &amp;fmt);
+ if (fmt.fmt.pix.pixelformat != V4L2_PIX_FMT_RGB24) {
+ printf("Libv4l didn't accept RGB24 format. Can't proceed.\n");
+ exit(EXIT_FAILURE);
+ }
+ if ((fmt.fmt.pix.width != 640) || (fmt.fmt.pix.height != 480))
+ printf("Warning: driver is sending image at %dx%d\n",
+ fmt.fmt.pix.width, fmt.fmt.pix.height);
+
+ CLEAR(req);
+ req.count = 2;
+ req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ req.memory = V4L2_MEMORY_MMAP;
+ xioctl(fd, VIDIOC_REQBUFS, &amp;req);
+
+ buffers = calloc(req.count, sizeof(*buffers));
+ for (n_buffers = 0; n_buffers &lt; req.count; ++n_buffers) {
+ CLEAR(buf);
+
+ buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ buf.memory = V4L2_MEMORY_MMAP;
+ buf.index = n_buffers;
+
+ xioctl(fd, VIDIOC_QUERYBUF, &amp;buf);
+
+ buffers[n_buffers].length = buf.length;
+ buffers[n_buffers].start = v4l2_mmap(NULL, buf.length,
+ PROT_READ | PROT_WRITE, MAP_SHARED,
+ fd, buf.m.offset);
+
+ if (MAP_FAILED == buffers[n_buffers].start) {
+ perror("mmap");
+ exit(EXIT_FAILURE);
+ }
+ }
+
+ for (i = 0; i &lt; n_buffers; ++i) {
+ CLEAR(buf);
+ buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ buf.memory = V4L2_MEMORY_MMAP;
+ buf.index = i;
+ xioctl(fd, VIDIOC_QBUF, &amp;buf);
+ }
+ type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+
+ xioctl(fd, VIDIOC_STREAMON, &amp;type);
+ for (i = 0; i &lt; 20; i++) {
+ do {
+ FD_ZERO(&amp;fds);
+ FD_SET(fd, &amp;fds);
+
+ /* Timeout. */
+ tv.tv_sec = 2;
+ tv.tv_usec = 0;
+
+ r = select(fd + 1, &amp;fds, NULL, NULL, &amp;tv);
+ } while ((r == -1 &amp;&amp; (errno = EINTR)));
+ if (r == -1) {
+ perror("select");
+ return errno;
+ }
+
+ CLEAR(buf);
+ buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ buf.memory = V4L2_MEMORY_MMAP;
+ xioctl(fd, VIDIOC_DQBUF, &amp;buf);
+
+ sprintf(out_name, "out%03d.ppm", i);
+ fout = fopen(out_name, "w");
+ if (!fout) {
+ perror("Cannot open image");
+ exit(EXIT_FAILURE);
+ }
+ fprintf(fout, "P6\n%d %d 255\n",
+ fmt.fmt.pix.width, fmt.fmt.pix.height);
+ fwrite(buffers[buf.index].start, buf.bytesused, 1, fout);
+ fclose(fout);
+
+ xioctl(fd, VIDIOC_QBUF, &amp;buf);
+ }
+
+ type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ xioctl(fd, VIDIOC_STREAMOFF, &amp;type);
+ for (i = 0; i &lt; n_buffers; ++i)
+ v4l2_munmap(buffers[i].start, buffers[i].length);
+ v4l2_close(fd);
+
+ return 0;
+}
+</programlisting>
diff --git a/Documentation/DocBook/media/v4l/vidioc-create-bufs.xml b/Documentation/DocBook/media/v4l/vidioc-create-bufs.xml
new file mode 100644
index 000000000..9b700a5f4
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-create-bufs.xml
@@ -0,0 +1,165 @@
+<refentry id="vidioc-create-bufs">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_CREATE_BUFS</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_CREATE_BUFS</refname>
+ <refpurpose>Create buffers for Memory Mapped or User Pointer or DMA Buffer
+ I/O</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_create_buffers *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_CREATE_BUFS</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <note>
+ <title>Experimental</title>
+ <para>This is an <link linkend="experimental"> experimental </link>
+ interface and may change in the future.</para>
+ </note>
+
+ <para>This ioctl is used to create buffers for <link linkend="mmap">memory
+mapped</link> or <link linkend="userp">user pointer</link> or <link
+linkend="dmabuf">DMA buffer</link> I/O. It can be used as an alternative or in
+addition to the <constant>VIDIOC_REQBUFS</constant> ioctl, when a tighter
+control over buffers is required. This ioctl can be called multiple times to
+create buffers of different sizes.</para>
+
+ <para>To allocate the device buffers applications must initialize the
+relevant fields of the <structname>v4l2_create_buffers</structname> structure.
+The <structfield>count</structfield> field must be set to the number of
+requested buffers, the <structfield>memory</structfield> field specifies the
+requested I/O method and the <structfield>reserved</structfield> array must be
+zeroed.</para>
+
+ <para>The <structfield>format</structfield> field specifies the image format
+that the buffers must be able to handle. The application has to fill in this
+&v4l2-format;. Usually this will be done using the
+<constant>VIDIOC_TRY_FMT</constant> or <constant>VIDIOC_G_FMT</constant> ioctl()
+to ensure that the requested format is supported by the driver. Unsupported
+formats will result in an error.</para>
+
+ <para>The buffers created by this ioctl will have as minimum size the size
+defined by the <structfield>format.pix.sizeimage</structfield> field. If the
+<structfield>format.pix.sizeimage</structfield> field is less than the minimum
+required for the given format, then <structfield>sizeimage</structfield> will be
+increased by the driver to that minimum to allocate the buffers. If it is
+larger, then the value will be used as-is. The same applies to the
+<structfield>sizeimage</structfield> field of the
+<structname>v4l2_plane_pix_format</structname> structure in the case of
+multiplanar formats.</para>
+
+ <para>When the ioctl is called with a pointer to this structure the driver
+will attempt to allocate up to the requested number of buffers and store the
+actual number allocated and the starting index in the
+<structfield>count</structfield> and the <structfield>index</structfield> fields
+respectively. On return <structfield>count</structfield> can be smaller than
+the number requested. The driver may also increase buffer sizes if required,
+however, it will not update <structfield>sizeimage</structfield> field values.
+The user has to use <constant>VIDIOC_QUERYBUF</constant> to retrieve that
+information.</para>
+
+ <table pgwide="1" frame="none" id="v4l2-create-buffers">
+ <title>struct <structname>v4l2_create_buffers</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>index</structfield></entry>
+ <entry>The starting buffer index, returned by the driver.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>count</structfield></entry>
+ <entry>The number of buffers requested or granted. If count == 0, then
+ <constant>VIDIOC_CREATE_BUFS</constant> will set <structfield>index</structfield>
+ to the current number of created buffers, and it will check the validity of
+ <structfield>memory</structfield> and <structfield>format.type</structfield>.
+ If those are invalid -1 is returned and errno is set to &EINVAL;,
+ otherwise <constant>VIDIOC_CREATE_BUFS</constant> returns 0. It will
+ never set errno to &EBUSY; in this particular case.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>memory</structfield></entry>
+ <entry>Applications set this field to
+<constant>V4L2_MEMORY_MMAP</constant>,
+<constant>V4L2_MEMORY_DMABUF</constant> or
+<constant>V4L2_MEMORY_USERPTR</constant>. See <xref linkend="v4l2-memory"
+/></entry>
+ </row>
+ <row>
+ <entry>&v4l2-format;</entry>
+ <entry><structfield>format</structfield></entry>
+ <entry>Filled in by the application, preserved by the driver.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved</structfield>[8]</entry>
+ <entry>A place holder for future extensions.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>ENOMEM</errorcode></term>
+ <listitem>
+ <para>No memory to allocate buffers for <link linkend="mmap">memory
+mapped</link> I/O.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The buffer type (<structfield>format.type</structfield> field),
+requested I/O method (<structfield>memory</structfield>) or format
+(<structfield>format</structfield> field) is not valid.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-cropcap.xml b/Documentation/DocBook/media/v4l/vidioc-cropcap.xml
new file mode 100644
index 000000000..50cb940cb
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-cropcap.xml
@@ -0,0 +1,166 @@
+<refentry id="vidioc-cropcap">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_CROPCAP</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_CROPCAP</refname>
+ <refpurpose>Information about the video cropping and scaling abilities</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_cropcap
+*<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_CROPCAP</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>Applications use this function to query the cropping
+limits, the pixel aspect of images and to calculate scale factors.
+They set the <structfield>type</structfield> field of a v4l2_cropcap
+structure to the respective buffer (stream) type and call the
+<constant>VIDIOC_CROPCAP</constant> ioctl with a pointer to this
+structure. Drivers fill the rest of the structure. The results are
+constant except when switching the video standard. Remember this
+switch can occur implicit when switching the video input or
+output.</para>
+
+<para>Do not use the multiplanar buffer types. Use <constant>V4L2_BUF_TYPE_VIDEO_CAPTURE</constant>
+instead of <constant>V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE</constant>
+and use <constant>V4L2_BUF_TYPE_VIDEO_OUTPUT</constant> instead of
+<constant>V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE</constant>.</para>
+
+ <para>This ioctl must be implemented for video capture or output devices that
+support cropping and/or scaling and/or have non-square pixels, and for overlay devices.</para>
+
+ <table pgwide="1" frame="none" id="v4l2-cropcap">
+ <title>struct <structname>v4l2_cropcap</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>type</structfield></entry>
+ <entry>Type of the data stream, set by the application.
+Only these types are valid here:
+<constant>V4L2_BUF_TYPE_VIDEO_CAPTURE</constant>,
+<constant>V4L2_BUF_TYPE_VIDEO_OUTPUT</constant> and
+<constant>V4L2_BUF_TYPE_VIDEO_OVERLAY</constant>. See <xref linkend="v4l2-buf-type" />.</entry>
+ </row>
+ <row>
+ <entry>struct <link linkend="v4l2-rect-crop">v4l2_rect</link></entry>
+ <entry><structfield>bounds</structfield></entry>
+ <entry>Defines the window within capturing or output is
+possible, this may exclude for example the horizontal and vertical
+blanking areas. The cropping rectangle cannot exceed these limits.
+Width and height are defined in pixels, the driver writer is free to
+choose origin and units of the coordinate system in the analog
+domain.</entry>
+ </row>
+ <row>
+ <entry>struct <link linkend="v4l2-rect-crop">v4l2_rect</link></entry>
+ <entry><structfield>defrect</structfield></entry>
+ <entry>Default cropping rectangle, it shall cover the
+"whole picture". Assuming pixel aspect 1/1 this could be for example a
+640&nbsp;&times;&nbsp;480 rectangle for NTSC, a
+768&nbsp;&times;&nbsp;576 rectangle for PAL and SECAM centered over
+the active picture area. The same co-ordinate system as for
+ <structfield>bounds</structfield> is used.</entry>
+ </row>
+ <row>
+ <entry>&v4l2-fract;</entry>
+ <entry><structfield>pixelaspect</structfield></entry>
+ <entry><para>This is the pixel aspect (y / x) when no
+scaling is applied, the ratio of the actual sampling
+frequency and the frequency required to get square
+pixels.</para><para>When cropping coordinates refer to square pixels,
+the driver sets <structfield>pixelaspect</structfield> to 1/1. Other
+common values are 54/59 for PAL and SECAM, 11/10 for NTSC sampled
+according to [<xref linkend="itu601" />].</para></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <!-- NB this table is duplicated in the overlay chapter. -->
+
+ <table pgwide="1" frame="none" id="v4l2-rect-crop">
+ <title>struct <structname>v4l2_rect</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__s32</entry>
+ <entry><structfield>left</structfield></entry>
+ <entry>Horizontal offset of the top, left corner of the
+rectangle, in pixels.</entry>
+ </row>
+ <row>
+ <entry>__s32</entry>
+ <entry><structfield>top</structfield></entry>
+ <entry>Vertical offset of the top, left corner of the
+rectangle, in pixels.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>width</structfield></entry>
+ <entry>Width of the rectangle, in pixels.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>height</structfield></entry>
+ <entry>Height of the rectangle, in pixels.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The &v4l2-cropcap; <structfield>type</structfield> is
+invalid.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-dbg-g-chip-info.xml b/Documentation/DocBook/media/v4l/vidioc-dbg-g-chip-info.xml
new file mode 100644
index 000000000..4c4603c13
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-dbg-g-chip-info.xml
@@ -0,0 +1,207 @@
+<refentry id="vidioc-dbg-g-chip-info">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_DBG_G_CHIP_INFO</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_DBG_G_CHIP_INFO</refname>
+ <refpurpose>Identify the chips on a TV card</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_dbg_chip_info
+*<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_DBG_G_CHIP_INFO</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <note>
+ <title>Experimental</title>
+
+ <para>This is an <link
+linkend="experimental">experimental</link> interface and may change in
+the future.</para>
+ </note>
+
+ <para>For driver debugging purposes this ioctl allows test
+applications to query the driver about the chips present on the TV
+card. Regular applications must not use it. When you found a chip
+specific bug, please contact the linux-media mailing list (&v4l-ml;)
+so it can be fixed.</para>
+
+ <para>Additionally the Linux kernel must be compiled with the
+<constant>CONFIG_VIDEO_ADV_DEBUG</constant> option to enable this ioctl.</para>
+
+ <para>To query the driver applications must initialize the
+<structfield>match.type</structfield> and
+<structfield>match.addr</structfield> or <structfield>match.name</structfield>
+fields of a &v4l2-dbg-chip-info;
+and call <constant>VIDIOC_DBG_G_CHIP_INFO</constant> with a pointer to
+this structure. On success the driver stores information about the
+selected chip in the <structfield>name</structfield> and
+<structfield>flags</structfield> fields.</para>
+
+ <para>When <structfield>match.type</structfield> is
+<constant>V4L2_CHIP_MATCH_BRIDGE</constant>,
+<structfield>match.addr</structfield> selects the nth bridge 'chip'
+on the TV card. You can enumerate all chips by starting at zero and
+incrementing <structfield>match.addr</structfield> by one until
+<constant>VIDIOC_DBG_G_CHIP_INFO</constant> fails with an &EINVAL;.
+The number zero always selects the bridge chip itself, &eg; the chip
+connected to the PCI or USB bus. Non-zero numbers identify specific
+parts of the bridge chip such as an AC97 register block.</para>
+
+ <para>When <structfield>match.type</structfield> is
+<constant>V4L2_CHIP_MATCH_SUBDEV</constant>,
+<structfield>match.addr</structfield> selects the nth sub-device. This
+allows you to enumerate over all sub-devices.</para>
+
+ <para>On success, the <structfield>name</structfield> field will
+contain a chip name and the <structfield>flags</structfield> field will
+contain <constant>V4L2_CHIP_FL_READABLE</constant> if the driver supports
+reading registers from the device or <constant>V4L2_CHIP_FL_WRITABLE</constant>
+if the driver supports writing registers to the device.</para>
+
+ <para>We recommended the <application>v4l2-dbg</application>
+utility over calling this ioctl directly. It is available from the
+LinuxTV v4l-dvb repository; see <ulink
+url="http://linuxtv.org/repo/">http://linuxtv.org/repo/</ulink> for
+access instructions.</para>
+
+ <!-- Note for convenience vidioc-dbg-g-register.sgml
+ contains a duplicate of this table. -->
+ <table pgwide="1" frame="none" id="name-v4l2-dbg-match">
+ <title>struct <structname>v4l2_dbg_match</structname></title>
+ <tgroup cols="4">
+ &cs-ustr;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>type</structfield></entry>
+ <entry>See <xref linkend="name-chip-match-types" /> for a list of
+possible types.</entry>
+ </row>
+ <row>
+ <entry>union</entry>
+ <entry>(anonymous)</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>__u32</entry>
+ <entry><structfield>addr</structfield></entry>
+ <entry>Match a chip by this number, interpreted according
+to the <structfield>type</structfield> field.</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>char</entry>
+ <entry><structfield>name[32]</structfield></entry>
+ <entry>Match a chip by this name, interpreted according
+to the <structfield>type</structfield> field. Currently unused.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="v4l2-dbg-chip-info">
+ <title>struct <structname>v4l2_dbg_chip_info</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>struct v4l2_dbg_match</entry>
+ <entry><structfield>match</structfield></entry>
+ <entry>How to match the chip, see <xref linkend="name-v4l2-dbg-match" />.</entry>
+ </row>
+ <row>
+ <entry>char</entry>
+ <entry><structfield>name[32]</structfield></entry>
+ <entry>The name of the chip.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>flags</structfield></entry>
+ <entry>Set by the driver. If <constant>V4L2_CHIP_FL_READABLE</constant>
+is set, then the driver supports reading registers from the device. If
+<constant>V4L2_CHIP_FL_WRITABLE</constant> is set, then it supports writing registers.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved[8]</structfield></entry>
+ <entry>Reserved fields, both application and driver must set these to 0.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <!-- Note for convenience vidioc-dbg-g-register.sgml
+ contains a duplicate of this table. -->
+ <table pgwide="1" frame="none" id="name-chip-match-types">
+ <title>Chip Match Types</title>
+ <tgroup cols="3">
+ &cs-def;
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_CHIP_MATCH_BRIDGE</constant></entry>
+ <entry>0</entry>
+ <entry>Match the nth chip on the card, zero for the
+ bridge chip. Does not match sub-devices.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CHIP_MATCH_SUBDEV</constant></entry>
+ <entry>4</entry>
+ <entry>Match the nth sub-device.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The <structfield>match_type</structfield> is invalid or
+no device could be matched.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-dbg-g-register.xml b/Documentation/DocBook/media/v4l/vidioc-dbg-g-register.xml
new file mode 100644
index 000000000..3d038e75d
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-dbg-g-register.xml
@@ -0,0 +1,227 @@
+<refentry id="vidioc-dbg-g-register">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_DBG_G_REGISTER, VIDIOC_DBG_S_REGISTER</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_DBG_G_REGISTER</refname>
+ <refname>VIDIOC_DBG_S_REGISTER</refname>
+ <refpurpose>Read or write hardware registers</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_dbg_register *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>const struct v4l2_dbg_register
+*<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_DBG_G_REGISTER, VIDIOC_DBG_S_REGISTER</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <note>
+ <title>Experimental</title>
+
+ <para>This is an <link linkend="experimental">experimental</link>
+interface and may change in the future.</para>
+ </note>
+
+ <para>For driver debugging purposes these ioctls allow test
+applications to access hardware registers directly. Regular
+applications must not use them.</para>
+
+ <para>Since writing or even reading registers can jeopardize the
+system security, its stability and damage the hardware, both ioctls
+require superuser privileges. Additionally the Linux kernel must be
+compiled with the <constant>CONFIG_VIDEO_ADV_DEBUG</constant> option
+to enable these ioctls.</para>
+
+ <para>To write a register applications must initialize all fields
+of a &v4l2-dbg-register; except for <structfield>size</structfield> and call
+<constant>VIDIOC_DBG_S_REGISTER</constant> with a pointer to this
+structure. The <structfield>match.type</structfield> and
+<structfield>match.addr</structfield> or <structfield>match.name</structfield>
+fields select a chip on the TV
+card, the <structfield>reg</structfield> field specifies a register
+number and the <structfield>val</structfield> field the value to be
+written into the register.</para>
+
+ <para>To read a register applications must initialize the
+<structfield>match.type</structfield>,
+<structfield>match.addr</structfield> or <structfield>match.name</structfield> and
+<structfield>reg</structfield> fields, and call
+<constant>VIDIOC_DBG_G_REGISTER</constant> with a pointer to this
+structure. On success the driver stores the register value in the
+<structfield>val</structfield> field and the size (in bytes) of the
+value in <structfield>size</structfield>.</para>
+
+ <para>When <structfield>match.type</structfield> is
+<constant>V4L2_CHIP_MATCH_BRIDGE</constant>,
+<structfield>match.addr</structfield> selects the nth non-sub-device chip
+on the TV card. The number zero always selects the host chip, &eg; the
+chip connected to the PCI or USB bus. You can find out which chips are
+present with the &VIDIOC-DBG-G-CHIP-INFO; ioctl.</para>
+
+ <para>When <structfield>match.type</structfield> is
+<constant>V4L2_CHIP_MATCH_SUBDEV</constant>,
+<structfield>match.addr</structfield> selects the nth sub-device.</para>
+
+ <para>These ioctls are optional, not all drivers may support them.
+However when a driver supports these ioctls it must also support
+&VIDIOC-DBG-G-CHIP-INFO;. Conversely it may support
+<constant>VIDIOC_DBG_G_CHIP_INFO</constant> but not these ioctls.</para>
+
+ <para><constant>VIDIOC_DBG_G_REGISTER</constant> and
+<constant>VIDIOC_DBG_S_REGISTER</constant> were introduced in Linux
+2.6.21, but their API was changed to the one described here in kernel 2.6.29.</para>
+
+ <para>We recommended the <application>v4l2-dbg</application>
+utility over calling these ioctls directly. It is available from the
+LinuxTV v4l-dvb repository; see <ulink
+url="http://linuxtv.org/repo/">http://linuxtv.org/repo/</ulink> for
+access instructions.</para>
+
+ <!-- Note for convenience vidioc-dbg-g-chip-info.sgml
+ contains a duplicate of this table. -->
+ <table pgwide="1" frame="none" id="v4l2-dbg-match">
+ <title>struct <structname>v4l2_dbg_match</structname></title>
+ <tgroup cols="4">
+ &cs-ustr;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>type</structfield></entry>
+ <entry>See <xref linkend="chip-match-types" /> for a list of
+possible types.</entry>
+ </row>
+ <row>
+ <entry>union</entry>
+ <entry>(anonymous)</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>__u32</entry>
+ <entry><structfield>addr</structfield></entry>
+ <entry>Match a chip by this number, interpreted according
+to the <structfield>type</structfield> field.</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>char</entry>
+ <entry><structfield>name[32]</structfield></entry>
+ <entry>Match a chip by this name, interpreted according
+to the <structfield>type</structfield> field. Currently unused.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+
+ <table pgwide="1" frame="none" id="v4l2-dbg-register">
+ <title>struct <structname>v4l2_dbg_register</structname></title>
+ <tgroup cols="4">
+ <colspec colname="c1" />
+ <colspec colname="c2" />
+ <colspec colname="c4" />
+ <tbody valign="top">
+ <row>
+ <entry>struct v4l2_dbg_match</entry>
+ <entry><structfield>match</structfield></entry>
+ <entry>How to match the chip, see <xref linkend="v4l2-dbg-match" />.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>size</structfield></entry>
+ <entry>The register size in bytes.</entry>
+ </row>
+ <row>
+ <entry>__u64</entry>
+ <entry><structfield>reg</structfield></entry>
+ <entry>A register number.</entry>
+ </row>
+ <row>
+ <entry>__u64</entry>
+ <entry><structfield>val</structfield></entry>
+ <entry>The value read from, or to be written into the
+register.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <!-- Note for convenience vidioc-dbg-g-chip-info.sgml
+ contains a duplicate of this table. -->
+ <table pgwide="1" frame="none" id="chip-match-types">
+ <title>Chip Match Types</title>
+ <tgroup cols="3">
+ &cs-def;
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_CHIP_MATCH_BRIDGE</constant></entry>
+ <entry>0</entry>
+ <entry>Match the nth chip on the card, zero for the
+ bridge chip. Does not match sub-devices.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CHIP_MATCH_SUBDEV</constant></entry>
+ <entry>4</entry>
+ <entry>Match the nth sub-device.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EPERM</errorcode></term>
+ <listitem>
+ <para>Insufficient permissions. Root privileges are required
+to execute these ioctls.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-decoder-cmd.xml b/Documentation/DocBook/media/v4l/vidioc-decoder-cmd.xml
new file mode 100644
index 000000000..9215627b0
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-decoder-cmd.xml
@@ -0,0 +1,249 @@
+<refentry id="vidioc-decoder-cmd">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_DECODER_CMD, VIDIOC_TRY_DECODER_CMD</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_DECODER_CMD</refname>
+ <refname>VIDIOC_TRY_DECODER_CMD</refname>
+ <refpurpose>Execute an decoder command</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_decoder_cmd *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_DECODER_CMD, VIDIOC_TRY_DECODER_CMD</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>These ioctls control an audio/video (usually MPEG-) decoder.
+<constant>VIDIOC_DECODER_CMD</constant> sends a command to the
+decoder, <constant>VIDIOC_TRY_DECODER_CMD</constant> can be used to
+try a command without actually executing it. To send a command applications
+must initialize all fields of a &v4l2-decoder-cmd; and call
+<constant>VIDIOC_DECODER_CMD</constant> or <constant>VIDIOC_TRY_DECODER_CMD</constant>
+with a pointer to this structure.</para>
+
+ <para>The <structfield>cmd</structfield> field must contain the
+command code. Some commands use the <structfield>flags</structfield> field for
+additional information.
+</para>
+
+ <para>A <function>write</function>() or &VIDIOC-STREAMON; call sends an implicit
+START command to the decoder if it has not been started yet.
+</para>
+
+ <para>A <function>close</function>() or &VIDIOC-STREAMOFF; call of a streaming
+file descriptor sends an implicit immediate STOP command to the decoder, and all
+buffered data is discarded.</para>
+
+ <para>These ioctls are optional, not all drivers may support
+them. They were introduced in Linux 3.3.</para>
+
+ <table pgwide="1" frame="none" id="v4l2-decoder-cmd">
+ <title>struct <structname>v4l2_decoder_cmd</structname></title>
+ <tgroup cols="5">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>cmd</structfield></entry>
+ <entry></entry>
+ <entry></entry>
+ <entry>The decoder command, see <xref linkend="decoder-cmds" />.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>flags</structfield></entry>
+ <entry></entry>
+ <entry></entry>
+ <entry>Flags to go with the command. If no flags are defined for
+this command, drivers and applications must set this field to zero.</entry>
+ </row>
+ <row>
+ <entry>union</entry>
+ <entry>(anonymous)</entry>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>struct</entry>
+ <entry><structfield>start</structfield></entry>
+ <entry></entry>
+ <entry>Structure containing additional data for the
+<constant>V4L2_DEC_CMD_START</constant> command.</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry>__s32</entry>
+ <entry><structfield>speed</structfield></entry>
+ <entry>Playback speed and direction. The playback speed is defined as
+<structfield>speed</structfield>/1000 of the normal speed. So 1000 is normal playback.
+Negative numbers denote reverse playback, so -1000 does reverse playback at normal
+speed. Speeds -1, 0 and 1 have special meanings: speed 0 is shorthand for 1000
+(normal playback). A speed of 1 steps just one frame forward, a speed of -1 steps
+just one frame back.
+ </entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry>__u32</entry>
+ <entry><structfield>format</structfield></entry>
+ <entry>Format restrictions. This field is set by the driver, not the
+application. Possible values are <constant>V4L2_DEC_START_FMT_NONE</constant> if
+there are no format restrictions or <constant>V4L2_DEC_START_FMT_GOP</constant>
+if the decoder operates on full GOPs (<wordasword>Group Of Pictures</wordasword>).
+This is usually the case for reverse playback: the decoder needs full GOPs, which
+it can then play in reverse order. So to implement reverse playback the application
+must feed the decoder the last GOP in the video file, then the GOP before that, etc. etc.
+ </entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>struct</entry>
+ <entry><structfield>stop</structfield></entry>
+ <entry></entry>
+ <entry>Structure containing additional data for the
+<constant>V4L2_DEC_CMD_STOP</constant> command.</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry>__u64</entry>
+ <entry><structfield>pts</structfield></entry>
+ <entry>Stop playback at this <structfield>pts</structfield> or immediately
+if the playback is already past that timestamp. Leave to 0 if you want to stop after the
+last frame was decoded.
+ </entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>struct</entry>
+ <entry><structfield>raw</structfield></entry>
+ <entry></entry>
+ <entry></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry>__u32</entry>
+ <entry><structfield>data</structfield>[16]</entry>
+ <entry>Reserved for future extensions. Drivers and
+applications must set the array to zero.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="decoder-cmds">
+ <title>Decoder Commands</title>
+ <tgroup cols="3">
+ &cs-def;
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_DEC_CMD_START</constant></entry>
+ <entry>0</entry>
+ <entry>Start the decoder. When the decoder is already
+running or paused, this command will just change the playback speed.
+That means that calling <constant>V4L2_DEC_CMD_START</constant> when
+the decoder was paused will <emphasis>not</emphasis> resume the decoder.
+You have to explicitly call <constant>V4L2_DEC_CMD_RESUME</constant> for that.
+This command has one flag:
+<constant>V4L2_DEC_CMD_START_MUTE_AUDIO</constant>. If set, then audio will
+be muted when playing back at a non-standard speed.
+ </entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_DEC_CMD_STOP</constant></entry>
+ <entry>1</entry>
+ <entry>Stop the decoder. When the decoder is already stopped,
+this command does nothing. This command has two flags:
+if <constant>V4L2_DEC_CMD_STOP_TO_BLACK</constant> is set, then the decoder will
+set the picture to black after it stopped decoding. Otherwise the last image will
+repeat. If <constant>V4L2_DEC_CMD_STOP_IMMEDIATELY</constant> is set, then the decoder
+stops immediately (ignoring the <structfield>pts</structfield> value), otherwise it
+will keep decoding until timestamp >= pts or until the last of the pending data from
+its internal buffers was decoded.
+</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_DEC_CMD_PAUSE</constant></entry>
+ <entry>2</entry>
+ <entry>Pause the decoder. When the decoder has not been
+started yet, the driver will return an &EPERM;. When the decoder is
+already paused, this command does nothing. This command has one flag:
+if <constant>V4L2_DEC_CMD_PAUSE_TO_BLACK</constant> is set, then set the
+decoder output to black when paused.
+</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_DEC_CMD_RESUME</constant></entry>
+ <entry>3</entry>
+ <entry>Resume decoding after a PAUSE command. When the
+decoder has not been started yet, the driver will return an &EPERM;.
+When the decoder is already running, this command does nothing. No
+flags are defined for this command.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The <structfield>cmd</structfield> field is invalid.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EPERM</errorcode></term>
+ <listitem>
+ <para>The application sent a PAUSE or RESUME command when
+the decoder was not running.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-dqevent.xml b/Documentation/DocBook/media/v4l/vidioc-dqevent.xml
new file mode 100644
index 000000000..50ccd3394
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-dqevent.xml
@@ -0,0 +1,468 @@
+<refentry id="vidioc-dqevent">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_DQEVENT</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_DQEVENT</refname>
+ <refpurpose>Dequeue event</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_event
+*<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_DQEVENT</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>Dequeue an event from a video device. No input is required
+ for this ioctl. All the fields of the &v4l2-event; structure are
+ filled by the driver. The file handle will also receive exceptions
+ which the application may get by e.g. using the select system
+ call.</para>
+
+ <table frame="none" pgwide="1" id="v4l2-event">
+ <title>struct <structname>v4l2_event</structname></title>
+ <tgroup cols="4">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>type</structfield></entry>
+ <entry></entry>
+ <entry>Type of the event, see <xref linkend="event-type" />.</entry>
+ </row>
+ <row>
+ <entry>union</entry>
+ <entry><structfield>u</structfield></entry>
+ <entry></entry>
+ <entry></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>&v4l2-event-vsync;</entry>
+ <entry><structfield>vsync</structfield></entry>
+ <entry>Event data for event <constant>V4L2_EVENT_VSYNC</constant>.
+ </entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>&v4l2-event-ctrl;</entry>
+ <entry><structfield>ctrl</structfield></entry>
+ <entry>Event data for event <constant>V4L2_EVENT_CTRL</constant>.
+ </entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>&v4l2-event-frame-sync;</entry>
+ <entry><structfield>frame_sync</structfield></entry>
+ <entry>Event data for event
+ <constant>V4L2_EVENT_FRAME_SYNC</constant>.</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>&v4l2-event-motion-det;</entry>
+ <entry><structfield>motion_det</structfield></entry>
+ <entry>Event data for event V4L2_EVENT_MOTION_DET.</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>&v4l2-event-src-change;</entry>
+ <entry><structfield>src_change</structfield></entry>
+ <entry>Event data for event V4L2_EVENT_SOURCE_CHANGE.</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>__u8</entry>
+ <entry><structfield>data</structfield>[64]</entry>
+ <entry>Event data. Defined by the event type. The union
+ should be used to define easily accessible type for
+ events.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>pending</structfield></entry>
+ <entry></entry>
+ <entry>Number of pending events excluding this one.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>sequence</structfield></entry>
+ <entry></entry>
+ <entry>Event sequence number. The sequence number is
+ incremented for every subscribed event that takes place.
+ If sequence numbers are not contiguous it means that
+ events have been lost.
+ </entry>
+ </row>
+ <row>
+ <entry>struct timespec</entry>
+ <entry><structfield>timestamp</structfield></entry>
+ <entry></entry>
+ <entry>Event timestamp.</entry>
+ </row>
+ <row>
+ <entry>u32</entry>
+ <entry><structfield>id</structfield></entry>
+ <entry></entry>
+ <entry>The ID associated with the event source. If the event does not
+ have an associated ID (this depends on the event type), then this
+ is 0.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved</structfield>[8]</entry>
+ <entry></entry>
+ <entry>Reserved for future extensions. Drivers must set
+ the array to zero.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table frame="none" pgwide="1" id="event-type">
+ <title>Event Types</title>
+ <tgroup cols="3">
+ &cs-def;
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_EVENT_ALL</constant></entry>
+ <entry>0</entry>
+ <entry>All events. V4L2_EVENT_ALL is valid only for
+ VIDIOC_UNSUBSCRIBE_EVENT for unsubscribing all events at once.
+ </entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_EVENT_VSYNC</constant></entry>
+ <entry>1</entry>
+ <entry>This event is triggered on the vertical sync.
+ This event has a &v4l2-event-vsync; associated with it.
+ </entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_EVENT_EOS</constant></entry>
+ <entry>2</entry>
+ <entry>This event is triggered when the end of a stream is reached.
+ This is typically used with MPEG decoders to report to the application
+ when the last of the MPEG stream has been decoded.
+ </entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_EVENT_CTRL</constant></entry>
+ <entry>3</entry>
+ <entry><para>This event requires that the <structfield>id</structfield>
+ matches the control ID from which you want to receive events.
+ This event is triggered if the control's value changes, if a
+ button control is pressed or if the control's flags change.
+ This event has a &v4l2-event-ctrl; associated with it. This struct
+ contains much of the same information as &v4l2-queryctrl; and
+ &v4l2-control;.</para>
+
+ <para>If the event is generated due to a call to &VIDIOC-S-CTRL; or
+ &VIDIOC-S-EXT-CTRLS;, then the event will <emphasis>not</emphasis> be sent to
+ the file handle that called the ioctl function. This prevents
+ nasty feedback loops. If you <emphasis>do</emphasis> want to get the
+ event, then set the <constant>V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK</constant>
+ flag.
+ </para>
+
+ <para>This event type will ensure that no information is lost when
+ more events are raised than there is room internally. In that
+ case the &v4l2-event-ctrl; of the second-oldest event is kept,
+ but the <structfield>changes</structfield> field of the
+ second-oldest event is ORed with the <structfield>changes</structfield>
+ field of the oldest event.</para>
+ </entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_EVENT_FRAME_SYNC</constant></entry>
+ <entry>4</entry>
+ <entry>
+ <para>Triggered immediately when the reception of a
+ frame has begun. This event has a
+ &v4l2-event-frame-sync; associated with it.</para>
+
+ <para>If the hardware needs to be stopped in the case of a
+ buffer underrun it might not be able to generate this event.
+ In such cases the <structfield>frame_sequence</structfield>
+ field in &v4l2-event-frame-sync; will not be incremented. This
+ causes two consecutive frame sequence numbers to have n times
+ frame interval in between them.</para>
+ </entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_EVENT_SOURCE_CHANGE</constant></entry>
+ <entry>5</entry>
+ <entry>
+ <para>This event is triggered when a source parameter change is
+ detected during runtime by the video device. It can be a
+ runtime resolution change triggered by a video decoder or the
+ format change happening on an input connector.
+ This event requires that the <structfield>id</structfield>
+ matches the input index (when used with a video device node)
+ or the pad index (when used with a subdevice node) from which
+ you want to receive events.</para>
+
+ <para>This event has a &v4l2-event-src-change; associated
+ with it. The <structfield>changes</structfield> bitfield denotes
+ what has changed for the subscribed pad. If multiple events
+ occurred before application could dequeue them, then the changes
+ will have the ORed value of all the events generated.</para>
+ </entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_EVENT_MOTION_DET</constant></entry>
+ <entry>6</entry>
+ <entry>
+ <para>Triggered whenever the motion detection state for one or more of the regions
+ changes. This event has a &v4l2-event-motion-det; associated with it.</para>
+ </entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_EVENT_PRIVATE_START</constant></entry>
+ <entry>0x08000000</entry>
+ <entry>Base event number for driver-private events.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table frame="none" pgwide="1" id="v4l2-event-vsync">
+ <title>struct <structname>v4l2_event_vsync</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u8</entry>
+ <entry><structfield>field</structfield></entry>
+ <entry>The upcoming field. See &v4l2-field;.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table frame="none" pgwide="1" id="v4l2-event-ctrl">
+ <title>struct <structname>v4l2_event_ctrl</structname></title>
+ <tgroup cols="4">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>changes</structfield></entry>
+ <entry></entry>
+ <entry>A bitmask that tells what has changed. See <xref linkend="ctrl-changes-flags" />.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>type</structfield></entry>
+ <entry></entry>
+ <entry>The type of the control. See &v4l2-ctrl-type;.</entry>
+ </row>
+ <row>
+ <entry>union (anonymous)</entry>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>__s32</entry>
+ <entry><structfield>value</structfield></entry>
+ <entry>The 32-bit value of the control for 32-bit control types.
+ This is 0 for string controls since the value of a string
+ cannot be passed using &VIDIOC-DQEVENT;.</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>__s64</entry>
+ <entry><structfield>value64</structfield></entry>
+ <entry>The 64-bit value of the control for 64-bit control types.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>flags</structfield></entry>
+ <entry></entry>
+ <entry>The control flags. See <xref linkend="control-flags" />.</entry>
+ </row>
+ <row>
+ <entry>__s32</entry>
+ <entry><structfield>minimum</structfield></entry>
+ <entry></entry>
+ <entry>The minimum value of the control. See &v4l2-queryctrl;.</entry>
+ </row>
+ <row>
+ <entry>__s32</entry>
+ <entry><structfield>maximum</structfield></entry>
+ <entry></entry>
+ <entry>The maximum value of the control. See &v4l2-queryctrl;.</entry>
+ </row>
+ <row>
+ <entry>__s32</entry>
+ <entry><structfield>step</structfield></entry>
+ <entry></entry>
+ <entry>The step value of the control. See &v4l2-queryctrl;.</entry>
+ </row>
+ <row>
+ <entry>__s32</entry>
+ <entry><structfield>default_value</structfield></entry>
+ <entry></entry>
+ <entry>The default value value of the control. See &v4l2-queryctrl;.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table frame="none" pgwide="1" id="v4l2-event-frame-sync">
+ <title>struct <structname>v4l2_event_frame_sync</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>frame_sequence</structfield></entry>
+ <entry>
+ The sequence number of the frame being received.
+ </entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table frame="none" pgwide="1" id="v4l2-event-src-change">
+ <title>struct <structname>v4l2_event_src_change</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>changes</structfield></entry>
+ <entry>
+ A bitmask that tells what has changed. See <xref linkend="src-changes-flags" />.
+ </entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table frame="none" pgwide="1" id="v4l2-event-motion-det">
+ <title>struct <structname>v4l2_event_motion_det</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>flags</structfield></entry>
+ <entry>
+ Currently only one flag is available: if <constant>V4L2_EVENT_MD_FL_HAVE_FRAME_SEQ</constant>
+ is set, then the <structfield>frame_sequence</structfield> field is valid,
+ otherwise that field should be ignored.
+ </entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>frame_sequence</structfield></entry>
+ <entry>
+ The sequence number of the frame being received. Only valid if the
+ <constant>V4L2_EVENT_MD_FL_HAVE_FRAME_SEQ</constant> flag was set.
+ </entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>region_mask</structfield></entry>
+ <entry>
+ The bitmask of the regions that reported motion. There is at least one
+ region. If this field is 0, then no motion was detected at all.
+ If there is no <constant>V4L2_CID_DETECT_MD_REGION_GRID</constant> control
+ (see <xref linkend="detect-controls" />) to assign a different region
+ to each cell in the motion detection grid, then that all cells
+ are automatically assigned to the default region 0.
+ </entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="ctrl-changes-flags">
+ <title>Control Changes</title>
+ <tgroup cols="3">
+ &cs-def;
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_EVENT_CTRL_CH_VALUE</constant></entry>
+ <entry>0x0001</entry>
+ <entry>This control event was triggered because the value of the control
+ changed. Special cases: Volatile controls do no generate this event;
+ If a control has the <constant>V4L2_CTRL_FLAG_EXECUTE_ON_WRITE</constant>
+ flag set, then this event is sent as well, regardless its value.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_EVENT_CTRL_CH_FLAGS</constant></entry>
+ <entry>0x0002</entry>
+ <entry>This control event was triggered because the control flags
+ changed.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_EVENT_CTRL_CH_RANGE</constant></entry>
+ <entry>0x0004</entry>
+ <entry>This control event was triggered because the minimum,
+ maximum, step or the default value of the control changed.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="src-changes-flags">
+ <title>Source Changes</title>
+ <tgroup cols="3">
+ &cs-def;
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_EVENT_SRC_CH_RESOLUTION</constant></entry>
+ <entry>0x0001</entry>
+ <entry>This event gets triggered when a resolution change is
+ detected at an input. This can come from an input connector or
+ from a video decoder.
+ </entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </refsect1>
+ <refsect1>
+ &return-value;
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-dv-timings-cap.xml b/Documentation/DocBook/media/v4l/vidioc-dv-timings-cap.xml
new file mode 100644
index 000000000..a2017bfca
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-dv-timings-cap.xml
@@ -0,0 +1,214 @@
+<refentry id="vidioc-dv-timings-cap">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_DV_TIMINGS_CAP, VIDIOC_SUBDEV_DV_TIMINGS_CAP</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_DV_TIMINGS_CAP</refname>
+ <refname>VIDIOC_SUBDEV_DV_TIMINGS_CAP</refname>
+ <refpurpose>The capabilities of the Digital Video receiver/transmitter</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_dv_timings_cap *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_DV_TIMINGS_CAP, VIDIOC_SUBDEV_DV_TIMINGS_CAP</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <note>
+ <title>Experimental</title>
+ <para>This is an <link linkend="experimental"> experimental </link>
+ interface and may change in the future.</para>
+ </note>
+
+ <para>To query the capabilities of the DV receiver/transmitter applications
+can call the <constant>VIDIOC_DV_TIMINGS_CAP</constant> ioctl on a video node
+and the driver will fill in the structure. Note that drivers may return
+different values after switching the video input or output.</para>
+
+ <para>When implemented by the driver DV capabilities of subdevices can be
+queried by calling the <constant>VIDIOC_SUBDEV_DV_TIMINGS_CAP</constant> ioctl
+directly on a subdevice node. The capabilities are specific to inputs (for DV
+receivers) or outputs (for DV transmitters), applications must specify the
+desired pad number in the &v4l2-dv-timings-cap; <structfield>pad</structfield>
+field. Attempts to query capabilities on a pad that doesn't support them will
+return an &EINVAL;.</para>
+
+ <table pgwide="1" frame="none" id="v4l2-bt-timings-cap">
+ <title>struct <structname>v4l2_bt_timings_cap</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>min_width</structfield></entry>
+ <entry>Minimum width of the active video in pixels.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>max_width</structfield></entry>
+ <entry>Maximum width of the active video in pixels.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>min_height</structfield></entry>
+ <entry>Minimum height of the active video in lines.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>max_height</structfield></entry>
+ <entry>Maximum height of the active video in lines.</entry>
+ </row>
+ <row>
+ <entry>__u64</entry>
+ <entry><structfield>min_pixelclock</structfield></entry>
+ <entry>Minimum pixelclock frequency in Hz.</entry>
+ </row>
+ <row>
+ <entry>__u64</entry>
+ <entry><structfield>max_pixelclock</structfield></entry>
+ <entry>Maximum pixelclock frequency in Hz.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>standards</structfield></entry>
+ <entry>The video standard(s) supported by the hardware.
+ See <xref linkend="dv-bt-standards"/> for a list of standards.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>capabilities</structfield></entry>
+ <entry>Several flags giving more information about the capabilities.
+ See <xref linkend="dv-bt-cap-capabilities"/> for a description of the flags.
+ </entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved</structfield>[16]</entry>
+ <entry>Reserved for future extensions. Drivers must set the array to zero.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="v4l2-dv-timings-cap">
+ <title>struct <structname>v4l2_dv_timings_cap</structname></title>
+ <tgroup cols="4">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>type</structfield></entry>
+ <entry>Type of DV timings as listed in <xref linkend="dv-timing-types"/>.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>pad</structfield></entry>
+ <entry>Pad number as reported by the media controller API. This field
+ is only used when operating on a subdevice node. When operating on a
+ video node applications must set this field to zero.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved</structfield>[2]</entry>
+ <entry>Reserved for future extensions. Drivers must set the array to zero.</entry>
+ </row>
+ <row>
+ <entry>union</entry>
+ <entry><structfield></structfield></entry>
+ <entry></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>&v4l2-bt-timings-cap;</entry>
+ <entry><structfield>bt</structfield></entry>
+ <entry>BT.656/1120 timings capabilities of the hardware.</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>__u32</entry>
+ <entry><structfield>raw_data</structfield>[32]</entry>
+ <entry></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="dv-bt-cap-capabilities">
+ <title>DV BT Timing capabilities</title>
+ <tgroup cols="2">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>Flag</entry>
+ <entry>Description</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ </row>
+ <row>
+ <entry>V4L2_DV_BT_CAP_INTERLACED</entry>
+ <entry>Interlaced formats are supported.
+ </entry>
+ </row>
+ <row>
+ <entry>V4L2_DV_BT_CAP_PROGRESSIVE</entry>
+ <entry>Progressive formats are supported.
+ </entry>
+ </row>
+ <row>
+ <entry>V4L2_DV_BT_CAP_REDUCED_BLANKING</entry>
+ <entry>CVT/GTF specific: the timings can make use of reduced blanking (CVT)
+or the 'Secondary GTF' curve (GTF).
+ </entry>
+ </row>
+ <row>
+ <entry>V4L2_DV_BT_CAP_CUSTOM</entry>
+ <entry>Can support non-standard timings, i.e. timings not belonging to the
+standards set in the <structfield>standards</structfield> field.
+ </entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-encoder-cmd.xml b/Documentation/DocBook/media/v4l/vidioc-encoder-cmd.xml
new file mode 100644
index 000000000..0619ca5d2
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-encoder-cmd.xml
@@ -0,0 +1,189 @@
+<refentry id="vidioc-encoder-cmd">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_ENCODER_CMD, VIDIOC_TRY_ENCODER_CMD</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_ENCODER_CMD</refname>
+ <refname>VIDIOC_TRY_ENCODER_CMD</refname>
+ <refpurpose>Execute an encoder command</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_encoder_cmd *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_ENCODER_CMD, VIDIOC_TRY_ENCODER_CMD</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>These ioctls control an audio/video (usually MPEG-) encoder.
+<constant>VIDIOC_ENCODER_CMD</constant> sends a command to the
+encoder, <constant>VIDIOC_TRY_ENCODER_CMD</constant> can be used to
+try a command without actually executing it.</para>
+
+ <para>To send a command applications must initialize all fields of a
+ &v4l2-encoder-cmd; and call
+ <constant>VIDIOC_ENCODER_CMD</constant> or
+ <constant>VIDIOC_TRY_ENCODER_CMD</constant> with a pointer to this
+ structure.</para>
+
+ <para>The <structfield>cmd</structfield> field must contain the
+command code. The <structfield>flags</structfield> field is currently
+only used by the STOP command and contains one bit: If the
+<constant>V4L2_ENC_CMD_STOP_AT_GOP_END</constant> flag is set,
+encoding will continue until the end of the current <wordasword>Group
+Of Pictures</wordasword>, otherwise it will stop immediately.</para>
+
+ <para>A <function>read</function>() or &VIDIOC-STREAMON; call sends an implicit
+START command to the encoder if it has not been started yet. After a STOP command,
+<function>read</function>() calls will read the remaining data
+buffered by the driver. When the buffer is empty,
+<function>read</function>() will return zero and the next
+<function>read</function>() call will restart the encoder.</para>
+
+ <para>A <function>close</function>() or &VIDIOC-STREAMOFF; call of a streaming
+file descriptor sends an implicit immediate STOP to the encoder, and all buffered
+data is discarded.</para>
+
+ <para>These ioctls are optional, not all drivers may support
+them. They were introduced in Linux 2.6.21.</para>
+
+ <table pgwide="1" frame="none" id="v4l2-encoder-cmd">
+ <title>struct <structname>v4l2_encoder_cmd</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>cmd</structfield></entry>
+ <entry>The encoder command, see <xref linkend="encoder-cmds" />.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>flags</structfield></entry>
+ <entry>Flags to go with the command, see <xref
+ linkend="encoder-flags" />. If no flags are defined for
+this command, drivers and applications must set this field to
+zero.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>data</structfield>[8]</entry>
+ <entry>Reserved for future extensions. Drivers and
+applications must set the array to zero.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="encoder-cmds">
+ <title>Encoder Commands</title>
+ <tgroup cols="3">
+ &cs-def;
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_ENC_CMD_START</constant></entry>
+ <entry>0</entry>
+ <entry>Start the encoder. When the encoder is already
+running or paused, this command does nothing. No flags are defined for
+this command.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_ENC_CMD_STOP</constant></entry>
+ <entry>1</entry>
+ <entry>Stop the encoder. When the
+<constant>V4L2_ENC_CMD_STOP_AT_GOP_END</constant> flag is set,
+encoding will continue until the end of the current <wordasword>Group
+Of Pictures</wordasword>, otherwise encoding will stop immediately.
+When the encoder is already stopped, this command does
+nothing.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_ENC_CMD_PAUSE</constant></entry>
+ <entry>2</entry>
+ <entry>Pause the encoder. When the encoder has not been
+started yet, the driver will return an &EPERM;. When the encoder is
+already paused, this command does nothing. No flags are defined for
+this command.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_ENC_CMD_RESUME</constant></entry>
+ <entry>3</entry>
+ <entry>Resume encoding after a PAUSE command. When the
+encoder has not been started yet, the driver will return an &EPERM;.
+When the encoder is already running, this command does nothing. No
+flags are defined for this command.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="encoder-flags">
+ <title>Encoder Command Flags</title>
+ <tgroup cols="3">
+ &cs-def;
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_ENC_CMD_STOP_AT_GOP_END</constant></entry>
+ <entry>0x0001</entry>
+ <entry>Stop encoding at the end of the current <wordasword>Group Of
+Pictures</wordasword>, rather than immediately.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The <structfield>cmd</structfield> field is invalid.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EPERM</errorcode></term>
+ <listitem>
+ <para>The application sent a PAUSE or RESUME command when
+the encoder was not running.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-enum-dv-timings.xml b/Documentation/DocBook/media/v4l/vidioc-enum-dv-timings.xml
new file mode 100644
index 000000000..6e3cadd4e
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-enum-dv-timings.xml
@@ -0,0 +1,133 @@
+<refentry id="vidioc-enum-dv-timings">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_ENUM_DV_TIMINGS, VIDIOC_SUBDEV_ENUM_DV_TIMINGS</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_ENUM_DV_TIMINGS</refname>
+ <refname>VIDIOC_SUBDEV_ENUM_DV_TIMINGS</refname>
+ <refpurpose>Enumerate supported Digital Video timings</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_enum_dv_timings *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_ENUM_DV_TIMINGS, VIDIOC_SUBDEV_ENUM_DV_TIMINGS</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <note>
+ <title>Experimental</title>
+ <para>This is an <link linkend="experimental"> experimental </link>
+ interface and may change in the future.</para>
+ </note>
+
+ <para>While some DV receivers or transmitters support a wide range of timings, others
+support only a limited number of timings. With this ioctl applications can enumerate a list
+of known supported timings. Call &VIDIOC-DV-TIMINGS-CAP; to check if it also supports other
+standards or even custom timings that are not in this list.</para>
+
+ <para>To query the available timings, applications initialize the
+<structfield>index</structfield> field and zero the reserved array of &v4l2-enum-dv-timings;
+and call the <constant>VIDIOC_ENUM_DV_TIMINGS</constant> ioctl on a video node with a
+pointer to this structure. Drivers fill the rest of the structure or return an
+&EINVAL; when the index is out of bounds. To enumerate all supported DV timings,
+applications shall begin at index zero, incrementing by one until the
+driver returns <errorcode>EINVAL</errorcode>. Note that drivers may enumerate a
+different set of DV timings after switching the video input or
+output.</para>
+
+ <para>When implemented by the driver DV timings of subdevices can be queried
+by calling the <constant>VIDIOC_SUBDEV_ENUM_DV_TIMINGS</constant> ioctl directly
+on a subdevice node. The DV timings are specific to inputs (for DV receivers) or
+outputs (for DV transmitters), applications must specify the desired pad number
+in the &v4l2-enum-dv-timings; <structfield>pad</structfield> field. Attempts to
+enumerate timings on a pad that doesn't support them will return an &EINVAL;.</para>
+
+ <table pgwide="1" frame="none" id="v4l2-enum-dv-timings">
+ <title>struct <structname>v4l2_enum_dv_timings</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>index</structfield></entry>
+ <entry>Number of the DV timings, set by the
+application.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>pad</structfield></entry>
+ <entry>Pad number as reported by the media controller API. This field
+ is only used when operating on a subdevice node. When operating on a
+ video node applications must set this field to zero.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved</structfield>[2]</entry>
+ <entry>Reserved for future extensions. Drivers and applications must
+ set the array to zero.</entry>
+ </row>
+ <row>
+ <entry>&v4l2-dv-timings;</entry>
+ <entry><structfield>timings</structfield></entry>
+ <entry>The timings.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The &v4l2-enum-dv-timings; <structfield>index</structfield>
+is out of bounds or the <structfield>pad</structfield> number is invalid.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>ENODATA</errorcode></term>
+ <listitem>
+ <para>Digital video presets are not supported for this input or output.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-enum-fmt.xml b/Documentation/DocBook/media/v4l/vidioc-enum-fmt.xml
new file mode 100644
index 000000000..f8dfeed34
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-enum-fmt.xml
@@ -0,0 +1,159 @@
+<refentry id="vidioc-enum-fmt">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_ENUM_FMT</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_ENUM_FMT</refname>
+ <refpurpose>Enumerate image formats</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_fmtdesc
+*<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_ENUM_FMT</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>To enumerate image formats applications initialize the
+<structfield>type</structfield> and <structfield>index</structfield>
+field of &v4l2-fmtdesc; and call the
+<constant>VIDIOC_ENUM_FMT</constant> ioctl with a pointer to this
+structure. Drivers fill the rest of the structure or return an
+&EINVAL;. All formats are enumerable by beginning at index zero and
+incrementing by one until <errorcode>EINVAL</errorcode> is
+returned.</para>
+
+ <para>Note that after switching input or output the list of enumerated image
+formats may be different.</para>
+
+ <table pgwide="1" frame="none" id="v4l2-fmtdesc">
+ <title>struct <structname>v4l2_fmtdesc</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>index</structfield></entry>
+ <entry>Number of the format in the enumeration, set by
+the application. This is in no way related to the <structfield>
+pixelformat</structfield> field.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>type</structfield></entry>
+ <entry>Type of the data stream, set by the application.
+Only these types are valid here:
+<constant>V4L2_BUF_TYPE_VIDEO_CAPTURE</constant>,
+<constant>V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE</constant>,
+<constant>V4L2_BUF_TYPE_VIDEO_OUTPUT</constant>,
+<constant>V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE</constant> and
+<constant>V4L2_BUF_TYPE_VIDEO_OVERLAY</constant>. See <xref linkend="v4l2-buf-type" />.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>flags</structfield></entry>
+ <entry>See <xref linkend="fmtdesc-flags" /></entry>
+ </row>
+ <row>
+ <entry>__u8</entry>
+ <entry><structfield>description</structfield>[32]</entry>
+ <entry>Description of the format, a NUL-terminated ASCII
+string. This information is intended for the user, for example: "YUV
+4:2:2".</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>pixelformat</structfield></entry>
+ <entry>The image format identifier. This is a
+four character code as computed by the v4l2_fourcc()
+macro:</entry>
+ </row>
+ <row>
+ <entry spanname="hspan"><para><programlisting id="v4l2-fourcc">
+#define v4l2_fourcc(a,b,c,d) (((__u32)(a)&lt;&lt;0)|((__u32)(b)&lt;&lt;8)|((__u32)(c)&lt;&lt;16)|((__u32)(d)&lt;&lt;24))
+</programlisting></para><para>Several image formats are already
+defined by this specification in <xref linkend="pixfmt" />. Note these
+codes are not the same as those used in the Windows world.</para></entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved</structfield>[4]</entry>
+ <entry>Reserved for future extensions. Drivers must set
+the array to zero.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="fmtdesc-flags">
+ <title>Image Format Description Flags</title>
+ <tgroup cols="3">
+ &cs-def;
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_FMT_FLAG_COMPRESSED</constant></entry>
+ <entry>0x0001</entry>
+ <entry>This is a compressed format.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_FMT_FLAG_EMULATED</constant></entry>
+ <entry>0x0002</entry>
+ <entry>This format is not native to the device but emulated
+through software (usually libv4l2), where possible try to use a native format
+instead for better performance.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The &v4l2-fmtdesc; <structfield>type</structfield>
+is not supported or the <structfield>index</structfield> is out of
+bounds.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-enum-frameintervals.xml b/Documentation/DocBook/media/v4l/vidioc-enum-frameintervals.xml
new file mode 100644
index 000000000..5fd72c4c3
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-enum-frameintervals.xml
@@ -0,0 +1,259 @@
+<refentry id="vidioc-enum-frameintervals">
+
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_ENUM_FRAMEINTERVALS</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_ENUM_FRAMEINTERVALS</refname>
+ <refpurpose>Enumerate frame intervals</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_frmivalenum *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_ENUM_FRAMEINTERVALS</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para>Pointer to a &v4l2-frmivalenum; structure that
+contains a pixel format and size and receives a frame interval.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>This ioctl allows applications to enumerate all frame
+intervals that the device supports for the given pixel format and
+frame size.</para>
+ <para>The supported pixel formats and frame sizes can be obtained
+by using the &VIDIOC-ENUM-FMT; and &VIDIOC-ENUM-FRAMESIZES;
+functions.</para>
+ <para>The return value and the content of the
+<structfield>v4l2_frmivalenum.type</structfield> field depend on the
+type of frame intervals the device supports. Here are the semantics of
+the function for the different cases:</para>
+ <itemizedlist>
+ <listitem>
+ <para><emphasis role="bold">Discrete:</emphasis> The function
+returns success if the given index value (zero-based) is valid. The
+application should increase the index by one for each call until
+<constant>EINVAL</constant> is returned. The `v4l2_frmivalenum.type`
+field is set to `V4L2_FRMIVAL_TYPE_DISCRETE` by the driver. Of the
+union only the `discrete` member is valid.</para>
+ </listitem>
+ <listitem>
+ <para><emphasis role="bold">Step-wise:</emphasis> The function
+returns success if the given index value is zero and
+<constant>EINVAL</constant> for any other index value. The
+<structfield>v4l2_frmivalenum.type</structfield> field is set to
+<constant>V4L2_FRMIVAL_TYPE_STEPWISE</constant> by the driver. Of the
+union only the <structfield>stepwise</structfield> member is
+valid.</para>
+ </listitem>
+ <listitem>
+ <para><emphasis role="bold">Continuous:</emphasis> This is a
+special case of the step-wise type above. The function returns success
+if the given index value is zero and <constant>EINVAL</constant> for
+any other index value. The
+<structfield>v4l2_frmivalenum.type</structfield> field is set to
+<constant>V4L2_FRMIVAL_TYPE_CONTINUOUS</constant> by the driver. Of
+the union only the <structfield>stepwise</structfield> member is valid
+and the <structfield>step</structfield> value is set to 1.</para>
+ </listitem>
+ </itemizedlist>
+
+ <para>When the application calls the function with index zero, it
+must check the <structfield>type</structfield> field to determine the
+type of frame interval enumeration the device supports. Only for the
+<constant>V4L2_FRMIVAL_TYPE_DISCRETE</constant> type does it make
+sense to increase the index value to receive more frame
+intervals.</para>
+ <para>Note that the order in which the frame intervals are
+returned has no special meaning. In particular does it not say
+anything about potential default frame intervals.</para>
+ <para>Applications can assume that the enumeration data does not
+change without any interaction from the application itself. This means
+that the enumeration data is consistent if the application does not
+perform any other ioctl calls while it runs the frame interval
+enumeration.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>Notes</title>
+
+ <itemizedlist>
+ <listitem>
+ <para><emphasis role="bold">Frame intervals and frame
+rates:</emphasis> The V4L2 API uses frame intervals instead of frame
+rates. Given the frame interval the frame rate can be computed as
+follows:<screen>frame_rate = 1 / frame_interval</screen></para>
+ </listitem>
+ </itemizedlist>
+
+ </refsect1>
+
+ <refsect1>
+ <title>Structs</title>
+
+ <para>In the structs below, <emphasis>IN</emphasis> denotes a
+value that has to be filled in by the application,
+<emphasis>OUT</emphasis> denotes values that the driver fills in. The
+application should zero out all members except for the
+<emphasis>IN</emphasis> fields.</para>
+
+ <table pgwide="1" frame="none" id="v4l2-frmival-stepwise">
+ <title>struct <structname>v4l2_frmival_stepwise</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>&v4l2-fract;</entry>
+ <entry><structfield>min</structfield></entry>
+ <entry>Minimum frame interval [s].</entry>
+ </row>
+ <row>
+ <entry>&v4l2-fract;</entry>
+ <entry><structfield>max</structfield></entry>
+ <entry>Maximum frame interval [s].</entry>
+ </row>
+ <row>
+ <entry>&v4l2-fract;</entry>
+ <entry><structfield>step</structfield></entry>
+ <entry>Frame interval step size [s].</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="v4l2-frmivalenum">
+ <title>struct <structname>v4l2_frmivalenum</structname></title>
+ <tgroup cols="4">
+ <colspec colname="c1" />
+ <colspec colname="c2" />
+ <colspec colname="c3" />
+ <colspec colname="c4" />
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>index</structfield></entry>
+ <entry></entry>
+ <entry>IN: Index of the given frame interval in the
+enumeration.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>pixel_format</structfield></entry>
+ <entry></entry>
+ <entry>IN: Pixel format for which the frame intervals are
+enumerated.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>width</structfield></entry>
+ <entry></entry>
+ <entry>IN: Frame width for which the frame intervals are
+enumerated.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>height</structfield></entry>
+ <entry></entry>
+ <entry>IN: Frame height for which the frame intervals are
+enumerated.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>type</structfield></entry>
+ <entry></entry>
+ <entry>OUT: Frame interval type the device supports.</entry>
+ </row>
+ <row>
+ <entry>union</entry>
+ <entry></entry>
+ <entry></entry>
+ <entry>OUT: Frame interval with the given index.</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>&v4l2-fract;</entry>
+ <entry><structfield>discrete</structfield></entry>
+ <entry>Frame interval [s].</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>&v4l2-frmival-stepwise;</entry>
+ <entry><structfield>stepwise</structfield></entry>
+ <entry></entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved[2]</structfield></entry>
+ <entry></entry>
+ <entry>Reserved space for future use.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </refsect1>
+
+ <refsect1>
+ <title>Enums</title>
+
+ <table pgwide="1" frame="none" id="v4l2-frmivaltypes">
+ <title>enum <structname>v4l2_frmivaltypes</structname></title>
+ <tgroup cols="3">
+ &cs-def;
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_FRMIVAL_TYPE_DISCRETE</constant></entry>
+ <entry>1</entry>
+ <entry>Discrete frame interval.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_FRMIVAL_TYPE_CONTINUOUS</constant></entry>
+ <entry>2</entry>
+ <entry>Continuous frame interval.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_FRMIVAL_TYPE_STEPWISE</constant></entry>
+ <entry>3</entry>
+ <entry>Step-wise defined frame interval.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+ </refsect1>
+
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-enum-framesizes.xml b/Documentation/DocBook/media/v4l/vidioc-enum-framesizes.xml
new file mode 100644
index 000000000..a78454b5a
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-enum-framesizes.xml
@@ -0,0 +1,264 @@
+<refentry id="vidioc-enum-framesizes">
+
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_ENUM_FRAMESIZES</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_ENUM_FRAMESIZES</refname>
+ <refpurpose>Enumerate frame sizes</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_frmsizeenum *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_ENUM_FRAMESIZES</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para>Pointer to a &v4l2-frmsizeenum; that contains an index
+and pixel format and receives a frame width and height.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>This ioctl allows applications to enumerate all frame sizes
+(&ie; width and height in pixels) that the device supports for the
+given pixel format.</para>
+ <para>The supported pixel formats can be obtained by using the
+&VIDIOC-ENUM-FMT; function.</para>
+ <para>The return value and the content of the
+<structfield>v4l2_frmsizeenum.type</structfield> field depend on the
+type of frame sizes the device supports. Here are the semantics of the
+function for the different cases:</para>
+
+ <itemizedlist>
+ <listitem>
+ <para><emphasis role="bold">Discrete:</emphasis> The function
+returns success if the given index value (zero-based) is valid. The
+application should increase the index by one for each call until
+<constant>EINVAL</constant> is returned. The
+<structfield>v4l2_frmsizeenum.type</structfield> field is set to
+<constant>V4L2_FRMSIZE_TYPE_DISCRETE</constant> by the driver. Of the
+union only the <structfield>discrete</structfield> member is
+valid.</para>
+ </listitem>
+ <listitem>
+ <para><emphasis role="bold">Step-wise:</emphasis> The function
+returns success if the given index value is zero and
+<constant>EINVAL</constant> for any other index value. The
+<structfield>v4l2_frmsizeenum.type</structfield> field is set to
+<constant>V4L2_FRMSIZE_TYPE_STEPWISE</constant> by the driver. Of the
+union only the <structfield>stepwise</structfield> member is
+valid.</para>
+ </listitem>
+ <listitem>
+ <para><emphasis role="bold">Continuous:</emphasis> This is a
+special case of the step-wise type above. The function returns success
+if the given index value is zero and <constant>EINVAL</constant> for
+any other index value. The
+<structfield>v4l2_frmsizeenum.type</structfield> field is set to
+<constant>V4L2_FRMSIZE_TYPE_CONTINUOUS</constant> by the driver. Of
+the union only the <structfield>stepwise</structfield> member is valid
+and the <structfield>step_width</structfield> and
+<structfield>step_height</structfield> values are set to 1.</para>
+ </listitem>
+ </itemizedlist>
+
+ <para>When the application calls the function with index zero, it
+must check the <structfield>type</structfield> field to determine the
+type of frame size enumeration the device supports. Only for the
+<constant>V4L2_FRMSIZE_TYPE_DISCRETE</constant> type does it make
+sense to increase the index value to receive more frame sizes.</para>
+ <para>Note that the order in which the frame sizes are returned
+has no special meaning. In particular does it not say anything about
+potential default format sizes.</para>
+ <para>Applications can assume that the enumeration data does not
+change without any interaction from the application itself. This means
+that the enumeration data is consistent if the application does not
+perform any other ioctl calls while it runs the frame size
+enumeration.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>Structs</title>
+
+ <para>In the structs below, <emphasis>IN</emphasis> denotes a
+value that has to be filled in by the application,
+<emphasis>OUT</emphasis> denotes values that the driver fills in. The
+application should zero out all members except for the
+<emphasis>IN</emphasis> fields.</para>
+
+ <table pgwide="1" frame="none" id="v4l2-frmsize-discrete">
+ <title>struct <structname>v4l2_frmsize_discrete</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>width</structfield></entry>
+ <entry>Width of the frame [pixel].</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>height</structfield></entry>
+ <entry>Height of the frame [pixel].</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="v4l2-frmsize-stepwise">
+ <title>struct <structname>v4l2_frmsize_stepwise</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>min_width</structfield></entry>
+ <entry>Minimum frame width [pixel].</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>max_width</structfield></entry>
+ <entry>Maximum frame width [pixel].</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>step_width</structfield></entry>
+ <entry>Frame width step size [pixel].</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>min_height</structfield></entry>
+ <entry>Minimum frame height [pixel].</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>max_height</structfield></entry>
+ <entry>Maximum frame height [pixel].</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>step_height</structfield></entry>
+ <entry>Frame height step size [pixel].</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="v4l2-frmsizeenum">
+ <title>struct <structname>v4l2_frmsizeenum</structname></title>
+ <tgroup cols="4">
+ <colspec colname="c1" />
+ <colspec colname="c2" />
+ <colspec colname="c3" />
+ <colspec colname="c4" />
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>index</structfield></entry>
+ <entry></entry>
+ <entry>IN: Index of the given frame size in the enumeration.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>pixel_format</structfield></entry>
+ <entry></entry>
+ <entry>IN: Pixel format for which the frame sizes are enumerated.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>type</structfield></entry>
+ <entry></entry>
+ <entry>OUT: Frame size type the device supports.</entry>
+ </row>
+ <row>
+ <entry>union</entry>
+ <entry></entry>
+ <entry></entry>
+ <entry>OUT: Frame size with the given index.</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>&v4l2-frmsize-discrete;</entry>
+ <entry><structfield>discrete</structfield></entry>
+ <entry></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>&v4l2-frmsize-stepwise;</entry>
+ <entry><structfield>stepwise</structfield></entry>
+ <entry></entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved[2]</structfield></entry>
+ <entry></entry>
+ <entry>Reserved space for future use.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </refsect1>
+
+ <refsect1>
+ <title>Enums</title>
+
+ <table pgwide="1" frame="none" id="v4l2-frmsizetypes">
+ <title>enum <structname>v4l2_frmsizetypes</structname></title>
+ <tgroup cols="3">
+ &cs-def;
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_FRMSIZE_TYPE_DISCRETE</constant></entry>
+ <entry>1</entry>
+ <entry>Discrete frame size.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_FRMSIZE_TYPE_CONTINUOUS</constant></entry>
+ <entry>2</entry>
+ <entry>Continuous frame size.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_FRMSIZE_TYPE_STEPWISE</constant></entry>
+ <entry>3</entry>
+ <entry>Step-wise defined frame size.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-enum-freq-bands.xml b/Documentation/DocBook/media/v4l/vidioc-enum-freq-bands.xml
new file mode 100644
index 000000000..4e8ea65f7
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-enum-freq-bands.xml
@@ -0,0 +1,181 @@
+<refentry id="vidioc-enum-freq-bands">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_ENUM_FREQ_BANDS</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_ENUM_FREQ_BANDS</refname>
+ <refpurpose>Enumerate supported frequency bands</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_frequency_band
+*<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_ENUM_FREQ_BANDS</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <note>
+ <title>Experimental</title>
+ <para>This is an <link linkend="experimental"> experimental </link>
+ interface and may change in the future.</para>
+ </note>
+
+ <para>Enumerates the frequency bands that a tuner or modulator supports.
+To do this applications initialize the <structfield>tuner</structfield>,
+<structfield>type</structfield> and <structfield>index</structfield> fields,
+and zero out the <structfield>reserved</structfield> array of a &v4l2-frequency-band; and
+call the <constant>VIDIOC_ENUM_FREQ_BANDS</constant> ioctl with a pointer
+to this structure.</para>
+
+ <para>This ioctl is supported if the <constant>V4L2_TUNER_CAP_FREQ_BANDS</constant> capability
+ of the corresponding tuner/modulator is set.</para>
+
+ <table pgwide="1" frame="none" id="v4l2-frequency-band">
+ <title>struct <structname>v4l2_frequency_band</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>tuner</structfield></entry>
+ <entry>The tuner or modulator index number. This is the
+same value as in the &v4l2-input; <structfield>tuner</structfield>
+field and the &v4l2-tuner; <structfield>index</structfield> field, or
+the &v4l2-output; <structfield>modulator</structfield> field and the
+&v4l2-modulator; <structfield>index</structfield> field.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>type</structfield></entry>
+ <entry>The tuner type. This is the same value as in the
+&v4l2-tuner; <structfield>type</structfield> field. The type must be set
+to <constant>V4L2_TUNER_RADIO</constant> for <filename>/dev/radioX</filename>
+device nodes, and to <constant>V4L2_TUNER_ANALOG_TV</constant>
+for all others. Set this field to <constant>V4L2_TUNER_RADIO</constant> for
+modulators (currently only radio modulators are supported).
+See <xref linkend="v4l2-tuner-type" /></entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>index</structfield></entry>
+ <entry>Identifies the frequency band, set by the application.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>capability</structfield></entry>
+ <entry spanname="hspan">The tuner/modulator capability flags for
+this frequency band, see <xref linkend="tuner-capability" />. The <constant>V4L2_TUNER_CAP_LOW</constant>
+or <constant>V4L2_TUNER_CAP_1HZ</constant> capability must be the same for all frequency bands of the selected tuner/modulator.
+So either all bands have that capability set, or none of them have that capability.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>rangelow</structfield></entry>
+ <entry spanname="hspan">The lowest tunable frequency in
+units of 62.5 kHz, or if the <structfield>capability</structfield>
+flag <constant>V4L2_TUNER_CAP_LOW</constant> is set, in units of 62.5
+Hz, for this frequency band. A 1 Hz unit is used when the <structfield>capability</structfield> flag
+<constant>V4L2_TUNER_CAP_1HZ</constant> is set.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>rangehigh</structfield></entry>
+ <entry spanname="hspan">The highest tunable frequency in
+units of 62.5 kHz, or if the <structfield>capability</structfield>
+flag <constant>V4L2_TUNER_CAP_LOW</constant> is set, in units of 62.5
+Hz, for this frequency band. A 1 Hz unit is used when the <structfield>capability</structfield> flag
+<constant>V4L2_TUNER_CAP_1HZ</constant> is set.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>modulation</structfield></entry>
+ <entry spanname="hspan">The supported modulation systems of this frequency band.
+ See <xref linkend="band-modulation" />. Note that currently only one
+ modulation system per frequency band is supported. More work will need to
+ be done if multiple modulation systems are possible. Contact the
+ linux-media mailing list (&v4l-ml;) if you need that functionality.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved</structfield>[9]</entry>
+ <entry>Reserved for future extensions. Applications and drivers
+ must set the array to zero.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="band-modulation">
+ <title>Band Modulation Systems</title>
+ <tgroup cols="3">
+ &cs-def;
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_BAND_MODULATION_VSB</constant></entry>
+ <entry>0x02</entry>
+ <entry>Vestigial Sideband modulation, used for analog TV.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_BAND_MODULATION_FM</constant></entry>
+ <entry>0x04</entry>
+ <entry>Frequency Modulation, commonly used for analog radio.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_BAND_MODULATION_AM</constant></entry>
+ <entry>0x08</entry>
+ <entry>Amplitude Modulation, commonly used for analog radio.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The <structfield>tuner</structfield> or <structfield>index</structfield>
+is out of bounds or the <structfield>type</structfield> field is wrong.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-enumaudio.xml b/Documentation/DocBook/media/v4l/vidioc-enumaudio.xml
new file mode 100644
index 000000000..ea816ab2e
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-enumaudio.xml
@@ -0,0 +1,76 @@
+<refentry id="vidioc-enumaudio">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_ENUMAUDIO</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_ENUMAUDIO</refname>
+ <refpurpose>Enumerate audio inputs</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_audio *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_ENUMAUDIO</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>To query the attributes of an audio input applications
+initialize the <structfield>index</structfield> field and zero out the
+<structfield>reserved</structfield> array of a &v4l2-audio;
+and call the <constant>VIDIOC_ENUMAUDIO</constant> ioctl with a pointer
+to this structure. Drivers fill the rest of the structure or return an
+&EINVAL; when the index is out of bounds. To enumerate all audio
+inputs applications shall begin at index zero, incrementing by one
+until the driver returns <errorcode>EINVAL</errorcode>.</para>
+
+ <para>See <xref linkend="vidioc-g-audio" /> for a description of
+&v4l2-audio;.</para>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The number of the audio input is out of bounds.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-enumaudioout.xml b/Documentation/DocBook/media/v4l/vidioc-enumaudioout.xml
new file mode 100644
index 000000000..2e87cedb0
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-enumaudioout.xml
@@ -0,0 +1,79 @@
+<refentry id="vidioc-enumaudioout">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_ENUMAUDOUT</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_ENUMAUDOUT</refname>
+ <refpurpose>Enumerate audio outputs</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_audioout *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_ENUMAUDOUT</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>To query the attributes of an audio output applications
+initialize the <structfield>index</structfield> field and zero out the
+<structfield>reserved</structfield> array of a &v4l2-audioout; and
+call the <constant>VIDIOC_G_AUDOUT</constant> ioctl with a pointer
+to this structure. Drivers fill the rest of the structure or return an
+&EINVAL; when the index is out of bounds. To enumerate all audio
+outputs applications shall begin at index zero, incrementing by one
+until the driver returns <errorcode>EINVAL</errorcode>.</para>
+
+ <para>Note connectors on a TV card to loop back the received audio
+signal to a sound card are not audio outputs in this sense.</para>
+
+ <para>See <xref linkend="vidioc-g-audioout" /> for a description of
+&v4l2-audioout;.</para>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The number of the audio output is out of bounds.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-enuminput.xml b/Documentation/DocBook/media/v4l/vidioc-enuminput.xml
new file mode 100644
index 000000000..603fecef9
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-enuminput.xml
@@ -0,0 +1,316 @@
+<refentry id="vidioc-enuminput">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_ENUMINPUT</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_ENUMINPUT</refname>
+ <refpurpose>Enumerate video inputs</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_input
+*<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_ENUMINPUT</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>To query the attributes of a video input applications
+initialize the <structfield>index</structfield> field of &v4l2-input;
+and call the <constant>VIDIOC_ENUMINPUT</constant> ioctl with a
+pointer to this structure. Drivers fill the rest of the structure or
+return an &EINVAL; when the index is out of bounds. To enumerate all
+inputs applications shall begin at index zero, incrementing by one
+until the driver returns <errorcode>EINVAL</errorcode>.</para>
+
+ <table frame="none" pgwide="1" id="v4l2-input">
+ <title>struct <structname>v4l2_input</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>index</structfield></entry>
+ <entry>Identifies the input, set by the
+application.</entry>
+ </row>
+ <row>
+ <entry>__u8</entry>
+ <entry><structfield>name</structfield>[32]</entry>
+ <entry>Name of the video input, a NUL-terminated ASCII
+string, for example: "Vin (Composite 2)". This information is intended
+for the user, preferably the connector label on the device itself.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>type</structfield></entry>
+ <entry>Type of the input, see <xref
+ linkend="input-type" />.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>audioset</structfield></entry>
+ <entry><para>Drivers can enumerate up to 32 video and
+audio inputs. This field shows which audio inputs were selectable as
+audio source if this was the currently selected video input. It is a
+bit mask. The LSB corresponds to audio input 0, the MSB to input 31.
+Any number of bits can be set, or none.</para><para>When the driver
+does not enumerate audio inputs no bits must be set. Applications
+shall not interpret this as lack of audio support. Some drivers
+automatically select audio sources and do not enumerate them since
+there is no choice anyway.</para><para>For details on audio inputs and
+how to select the current input see <xref
+ linkend="audio" />.</para></entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>tuner</structfield></entry>
+ <entry>Capture devices can have zero or more tuners (RF
+demodulators). When the <structfield>type</structfield> is set to
+<constant>V4L2_INPUT_TYPE_TUNER</constant> this is an RF connector and
+this field identifies the tuner. It corresponds to
+&v4l2-tuner; field <structfield>index</structfield>. For details on
+tuners see <xref linkend="tuner" />.</entry>
+ </row>
+ <row>
+ <entry>&v4l2-std-id;</entry>
+ <entry><structfield>std</structfield></entry>
+ <entry>Every video input supports one or more different
+video standards. This field is a set of all supported standards. For
+details on video standards and how to switch see <xref
+linkend="standard" />.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>status</structfield></entry>
+ <entry>This field provides status information about the
+input. See <xref linkend="input-status" /> for flags.
+With the exception of the sensor orientation bits <structfield>status</structfield> is only valid when this is the
+current input.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>capabilities</structfield></entry>
+ <entry>This field provides capabilities for the
+input. See <xref linkend="input-capabilities" /> for flags.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved</structfield>[3]</entry>
+ <entry>Reserved for future extensions. Drivers must set
+the array to zero.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table frame="none" pgwide="1" id="input-type">
+ <title>Input Types</title>
+ <tgroup cols="3">
+ &cs-def;
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_INPUT_TYPE_TUNER</constant></entry>
+ <entry>1</entry>
+ <entry>This input uses a tuner (RF demodulator).</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_INPUT_TYPE_CAMERA</constant></entry>
+ <entry>2</entry>
+ <entry>Analog baseband input, for example CVBS /
+Composite Video, S-Video, RGB.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <!-- Status flags based on proposal by Mark McClelland,
+video4linux-list@redhat.com on 18 Oct 2002, subject "Re: [V4L] Re:
+v4l2 api". "Why are some of them inverted? So that the driver doesn't
+have to lie about the status in cases where it can't tell one way or
+the other. Plus, a status of zero would generally mean that everything
+is OK." -->
+
+ <table frame="none" pgwide="1" id="input-status">
+ <title>Input Status Flags</title>
+ <tgroup cols="3">
+ <colspec colname="c1" />
+ <colspec colname="c2" align="center" />
+ <colspec colname="c3" />
+ <spanspec namest="c1" nameend="c3" spanname="hspan"
+ align="left" />
+ <tbody valign="top">
+ <row>
+ <entry spanname="hspan">General</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_IN_ST_NO_POWER</constant></entry>
+ <entry>0x00000001</entry>
+ <entry>Attached device is off.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_IN_ST_NO_SIGNAL</constant></entry>
+ <entry>0x00000002</entry>
+ <entry></entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_IN_ST_NO_COLOR</constant></entry>
+ <entry>0x00000004</entry>
+ <entry>The hardware supports color decoding, but does not
+detect color modulation in the signal.</entry>
+ </row>
+ <row>
+ <entry spanname="hspan">Sensor Orientation</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_IN_ST_HFLIP</constant></entry>
+ <entry>0x00000010</entry>
+ <entry>The input is connected to a device that produces a signal
+that is flipped horizontally and does not correct this before passing the
+signal to userspace.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_IN_ST_VFLIP</constant></entry>
+ <entry>0x00000020</entry>
+ <entry>The input is connected to a device that produces a signal
+that is flipped vertically and does not correct this before passing the
+signal to userspace. Note that a 180 degree rotation is the same as HFLIP | VFLIP</entry>
+ </row>
+ <row>
+ <entry spanname="hspan">Analog Video</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_IN_ST_NO_H_LOCK</constant></entry>
+ <entry>0x00000100</entry>
+ <entry>No horizontal sync lock.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_IN_ST_COLOR_KILL</constant></entry>
+ <entry>0x00000200</entry>
+ <entry>A color killer circuit automatically disables color
+decoding when it detects no color modulation. When this flag is set
+the color killer is enabled <emphasis>and</emphasis> has shut off
+color decoding.</entry>
+ </row>
+ <row>
+ <entry spanname="hspan">Digital Video</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_IN_ST_NO_SYNC</constant></entry>
+ <entry>0x00010000</entry>
+ <entry>No synchronization lock.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_IN_ST_NO_EQU</constant></entry>
+ <entry>0x00020000</entry>
+ <entry>No equalizer lock.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_IN_ST_NO_CARRIER</constant></entry>
+ <entry>0x00040000</entry>
+ <entry>Carrier recovery failed.</entry>
+ </row>
+ <row>
+ <entry spanname="hspan">VCR and Set-Top Box</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_IN_ST_MACROVISION</constant></entry>
+ <entry>0x01000000</entry>
+ <entry>Macrovision is an analog copy prevention system
+mangling the video signal to confuse video recorders. When this
+flag is set Macrovision has been detected.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_IN_ST_NO_ACCESS</constant></entry>
+ <entry>0x02000000</entry>
+ <entry>Conditional access denied.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_IN_ST_VTR</constant></entry>
+ <entry>0x04000000</entry>
+ <entry>VTR time constant. [?]</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <!-- Capability flags based on video timings RFC by Muralidharan
+Karicheri, titled RFC (v1.2): V4L - Support for video timings at the
+input/output interface to linux-media@vger.kernel.org on 19 Oct 2009.
+ -->
+ <table frame="none" pgwide="1" id="input-capabilities">
+ <title>Input capabilities</title>
+ <tgroup cols="3">
+ &cs-def;
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_IN_CAP_DV_TIMINGS</constant></entry>
+ <entry>0x00000002</entry>
+ <entry>This input supports setting video timings by using VIDIOC_S_DV_TIMINGS.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_IN_CAP_STD</constant></entry>
+ <entry>0x00000004</entry>
+ <entry>This input supports setting the TV standard by using VIDIOC_S_STD.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_IN_CAP_NATIVE_SIZE</constant></entry>
+ <entry>0x00000008</entry>
+ <entry>This input supports setting the native size using
+ the <constant>V4L2_SEL_TGT_NATIVE_SIZE</constant>
+ selection target, see <xref
+ linkend="v4l2-selections-common"/>.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The &v4l2-input; <structfield>index</structfield> is
+out of bounds.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-enumoutput.xml b/Documentation/DocBook/media/v4l/vidioc-enumoutput.xml
new file mode 100644
index 000000000..773fb1258
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-enumoutput.xml
@@ -0,0 +1,201 @@
+<refentry id="vidioc-enumoutput">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_ENUMOUTPUT</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_ENUMOUTPUT</refname>
+ <refpurpose>Enumerate video outputs</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_output *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_ENUMOUTPUT</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>To query the attributes of a video outputs applications
+initialize the <structfield>index</structfield> field of &v4l2-output;
+and call the <constant>VIDIOC_ENUMOUTPUT</constant> ioctl with a
+pointer to this structure. Drivers fill the rest of the structure or
+return an &EINVAL; when the index is out of bounds. To enumerate all
+outputs applications shall begin at index zero, incrementing by one
+until the driver returns <errorcode>EINVAL</errorcode>.</para>
+
+ <table frame="none" pgwide="1" id="v4l2-output">
+ <title>struct <structname>v4l2_output</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>index</structfield></entry>
+ <entry>Identifies the output, set by the
+application.</entry>
+ </row>
+ <row>
+ <entry>__u8</entry>
+ <entry><structfield>name</structfield>[32]</entry>
+ <entry>Name of the video output, a NUL-terminated ASCII
+string, for example: "Vout". This information is intended for the
+user, preferably the connector label on the device itself.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>type</structfield></entry>
+ <entry>Type of the output, see <xref
+ linkend="output-type" />.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>audioset</structfield></entry>
+ <entry><para>Drivers can enumerate up to 32 video and
+audio outputs. This field shows which audio outputs were
+selectable as the current output if this was the currently selected
+video output. It is a bit mask. The LSB corresponds to audio output 0,
+the MSB to output 31. Any number of bits can be set, or
+none.</para><para>When the driver does not enumerate audio outputs no
+bits must be set. Applications shall not interpret this as lack of
+audio support. Drivers may automatically select audio outputs without
+enumerating them.</para><para>For details on audio outputs and how to
+select the current output see <xref linkend="audio" />.</para></entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>modulator</structfield></entry>
+ <entry>Output devices can have zero or more RF modulators.
+When the <structfield>type</structfield> is
+<constant>V4L2_OUTPUT_TYPE_MODULATOR</constant> this is an RF
+connector and this field identifies the modulator. It corresponds to
+&v4l2-modulator; field <structfield>index</structfield>. For details
+on modulators see <xref linkend="tuner" />.</entry>
+ </row>
+ <row>
+ <entry>&v4l2-std-id;</entry>
+ <entry><structfield>std</structfield></entry>
+ <entry>Every video output supports one or more different
+video standards. This field is a set of all supported standards. For
+details on video standards and how to switch see <xref
+ linkend="standard" />.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>capabilities</structfield></entry>
+ <entry>This field provides capabilities for the
+output. See <xref linkend="output-capabilities" /> for flags.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved</structfield>[3]</entry>
+ <entry>Reserved for future extensions. Drivers must set
+the array to zero.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table frame="none" pgwide="1" id="output-type">
+ <title>Output Type</title>
+ <tgroup cols="3">
+ &cs-def;
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_OUTPUT_TYPE_MODULATOR</constant></entry>
+ <entry>1</entry>
+ <entry>This output is an analog TV modulator.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_OUTPUT_TYPE_ANALOG</constant></entry>
+ <entry>2</entry>
+ <entry>Analog baseband output, for example Composite /
+CVBS, S-Video, RGB.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_OUTPUT_TYPE_ANALOGVGAOVERLAY</constant></entry>
+ <entry>3</entry>
+ <entry>[?]</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <!-- Capabilities flags based on video timings RFC by Muralidharan
+Karicheri, titled RFC (v1.2): V4L - Support for video timings at the
+input/output interface to linux-media@vger.kernel.org on 19 Oct 2009.
+ -->
+ <table frame="none" pgwide="1" id="output-capabilities">
+ <title>Output capabilities</title>
+ <tgroup cols="3">
+ &cs-def;
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_OUT_CAP_DV_TIMINGS</constant></entry>
+ <entry>0x00000002</entry>
+ <entry>This output supports setting video timings by using VIDIOC_S_DV_TIMINGS.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_OUT_CAP_STD</constant></entry>
+ <entry>0x00000004</entry>
+ <entry>This output supports setting the TV standard by using VIDIOC_S_STD.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_OUT_CAP_NATIVE_SIZE</constant></entry>
+ <entry>0x00000008</entry>
+ <entry>This output supports setting the native size using
+ the <constant>V4L2_SEL_TGT_NATIVE_SIZE</constant>
+ selection target, see <xref
+ linkend="v4l2-selections-common"/>.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ </refsect1>
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The &v4l2-output; <structfield>index</structfield>
+is out of bounds.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-enumstd.xml b/Documentation/DocBook/media/v4l/vidioc-enumstd.xml
new file mode 100644
index 000000000..806509940
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-enumstd.xml
@@ -0,0 +1,389 @@
+<refentry id="vidioc-enumstd">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_ENUMSTD</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_ENUMSTD</refname>
+ <refpurpose>Enumerate supported video standards</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_standard *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_ENUMSTD</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>To query the attributes of a video standard,
+especially a custom (driver defined) one, applications initialize the
+<structfield>index</structfield> field of &v4l2-standard; and call the
+<constant>VIDIOC_ENUMSTD</constant> ioctl with a pointer to this
+structure. Drivers fill the rest of the structure or return an
+&EINVAL; when the index is out of bounds. To enumerate all standards
+applications shall begin at index zero, incrementing by one until the
+driver returns <errorcode>EINVAL</errorcode>. Drivers may enumerate a
+different set of standards after switching the video input or
+output.<footnote>
+ <para>The supported standards may overlap and we need an
+unambiguous set to find the current standard returned by
+<constant>VIDIOC_G_STD</constant>.</para>
+ </footnote></para>
+
+ <table pgwide="1" frame="none" id="v4l2-standard">
+ <title>struct <structname>v4l2_standard</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>index</structfield></entry>
+ <entry>Number of the video standard, set by the
+application.</entry>
+ </row>
+ <row>
+ <entry>&v4l2-std-id;</entry>
+ <entry><structfield>id</structfield></entry>
+ <entry>The bits in this field identify the standard as
+one of the common standards listed in <xref linkend="v4l2-std-id" />,
+or if bits 32 to 63 are set as custom standards. Multiple bits can be
+set if the hardware does not distinguish between these standards,
+however separate indices do not indicate the opposite. The
+<structfield>id</structfield> must be unique. No other enumerated
+<structname>v4l2_standard</structname> structure, for this input or
+output anyway, can contain the same set of bits.</entry>
+ </row>
+ <row>
+ <entry>__u8</entry>
+ <entry><structfield>name</structfield>[24]</entry>
+ <entry>Name of the standard, a NUL-terminated ASCII
+string, for example: "PAL-B/G", "NTSC Japan". This information is
+intended for the user.</entry>
+ </row>
+ <row>
+ <entry>&v4l2-fract;</entry>
+ <entry><structfield>frameperiod</structfield></entry>
+ <entry>The frame period (not field period) is numerator
+/ denominator. For example M/NTSC has a frame period of 1001 /
+30000 seconds.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>framelines</structfield></entry>
+ <entry>Total lines per frame including blanking,
+e.&nbsp;g. 625 for B/PAL.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved</structfield>[4]</entry>
+ <entry>Reserved for future extensions. Drivers must set
+the array to zero.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="v4l2-fract">
+ <title>struct <structname>v4l2_fract</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>numerator</structfield></entry>
+ <entry></entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>denominator</structfield></entry>
+ <entry></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="v4l2-std-id">
+ <title>typedef <structname>v4l2_std_id</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u64</entry>
+ <entry><structfield>v4l2_std_id</structfield></entry>
+ <entry>This type is a set, each bit representing another
+video standard as listed below and in <xref
+linkend="video-standards" />. The 32 most significant bits are reserved
+for custom (driver defined) video standards.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <para><programlisting>
+#define V4L2_STD_PAL_B ((v4l2_std_id)0x00000001)
+#define V4L2_STD_PAL_B1 ((v4l2_std_id)0x00000002)
+#define V4L2_STD_PAL_G ((v4l2_std_id)0x00000004)
+#define V4L2_STD_PAL_H ((v4l2_std_id)0x00000008)
+#define V4L2_STD_PAL_I ((v4l2_std_id)0x00000010)
+#define V4L2_STD_PAL_D ((v4l2_std_id)0x00000020)
+#define V4L2_STD_PAL_D1 ((v4l2_std_id)0x00000040)
+#define V4L2_STD_PAL_K ((v4l2_std_id)0x00000080)
+
+#define V4L2_STD_PAL_M ((v4l2_std_id)0x00000100)
+#define V4L2_STD_PAL_N ((v4l2_std_id)0x00000200)
+#define V4L2_STD_PAL_Nc ((v4l2_std_id)0x00000400)
+#define V4L2_STD_PAL_60 ((v4l2_std_id)0x00000800)
+</programlisting></para><para><constant>V4L2_STD_PAL_60</constant> is
+a hybrid standard with 525 lines, 60 Hz refresh rate, and PAL color
+modulation with a 4.43 MHz color subcarrier. Some PAL video recorders
+can play back NTSC tapes in this mode for display on a 50/60 Hz agnostic
+PAL TV.</para><para><programlisting>
+#define V4L2_STD_NTSC_M ((v4l2_std_id)0x00001000)
+#define V4L2_STD_NTSC_M_JP ((v4l2_std_id)0x00002000)
+#define V4L2_STD_NTSC_443 ((v4l2_std_id)0x00004000)
+</programlisting></para><para><constant>V4L2_STD_NTSC_443</constant>
+is a hybrid standard with 525 lines, 60 Hz refresh rate, and NTSC
+color modulation with a 4.43 MHz color
+subcarrier.</para><para><programlisting>
+#define V4L2_STD_NTSC_M_KR ((v4l2_std_id)0x00008000)
+
+#define V4L2_STD_SECAM_B ((v4l2_std_id)0x00010000)
+#define V4L2_STD_SECAM_D ((v4l2_std_id)0x00020000)
+#define V4L2_STD_SECAM_G ((v4l2_std_id)0x00040000)
+#define V4L2_STD_SECAM_H ((v4l2_std_id)0x00080000)
+#define V4L2_STD_SECAM_K ((v4l2_std_id)0x00100000)
+#define V4L2_STD_SECAM_K1 ((v4l2_std_id)0x00200000)
+#define V4L2_STD_SECAM_L ((v4l2_std_id)0x00400000)
+#define V4L2_STD_SECAM_LC ((v4l2_std_id)0x00800000)
+
+/* ATSC/HDTV */
+#define V4L2_STD_ATSC_8_VSB ((v4l2_std_id)0x01000000)
+#define V4L2_STD_ATSC_16_VSB ((v4l2_std_id)0x02000000)
+</programlisting></para><para><!-- ATSC proposal by Mark McClelland,
+video4linux-list@redhat.com on 17 Oct 2002
+--><constant>V4L2_STD_ATSC_8_VSB</constant> and
+<constant>V4L2_STD_ATSC_16_VSB</constant> are U.S. terrestrial digital
+TV standards. Presently the V4L2 API does not support digital TV. See
+also the Linux DVB API at <ulink
+url="http://linuxtv.org">http://linuxtv.org</ulink>.</para>
+<para><programlisting>
+#define V4L2_STD_PAL_BG (V4L2_STD_PAL_B |\
+ V4L2_STD_PAL_B1 |\
+ V4L2_STD_PAL_G)
+#define V4L2_STD_B (V4L2_STD_PAL_B |\
+ V4L2_STD_PAL_B1 |\
+ V4L2_STD_SECAM_B)
+#define V4L2_STD_GH (V4L2_STD_PAL_G |\
+ V4L2_STD_PAL_H |\
+ V4L2_STD_SECAM_G |\
+ V4L2_STD_SECAM_H)
+#define V4L2_STD_PAL_DK (V4L2_STD_PAL_D |\
+ V4L2_STD_PAL_D1 |\
+ V4L2_STD_PAL_K)
+#define V4L2_STD_PAL (V4L2_STD_PAL_BG |\
+ V4L2_STD_PAL_DK |\
+ V4L2_STD_PAL_H |\
+ V4L2_STD_PAL_I)
+#define V4L2_STD_NTSC (V4L2_STD_NTSC_M |\
+ V4L2_STD_NTSC_M_JP |\
+ V4L2_STD_NTSC_M_KR)
+#define V4L2_STD_MN (V4L2_STD_PAL_M |\
+ V4L2_STD_PAL_N |\
+ V4L2_STD_PAL_Nc |\
+ V4L2_STD_NTSC)
+#define V4L2_STD_SECAM_DK (V4L2_STD_SECAM_D |\
+ V4L2_STD_SECAM_K |\
+ V4L2_STD_SECAM_K1)
+#define V4L2_STD_DK (V4L2_STD_PAL_DK |\
+ V4L2_STD_SECAM_DK)
+
+#define V4L2_STD_SECAM (V4L2_STD_SECAM_B |\
+ V4L2_STD_SECAM_G |\
+ V4L2_STD_SECAM_H |\
+ V4L2_STD_SECAM_DK |\
+ V4L2_STD_SECAM_L |\
+ V4L2_STD_SECAM_LC)
+
+#define V4L2_STD_525_60 (V4L2_STD_PAL_M |\
+ V4L2_STD_PAL_60 |\
+ V4L2_STD_NTSC |\
+ V4L2_STD_NTSC_443)
+#define V4L2_STD_625_50 (V4L2_STD_PAL |\
+ V4L2_STD_PAL_N |\
+ V4L2_STD_PAL_Nc |\
+ V4L2_STD_SECAM)
+
+#define V4L2_STD_UNKNOWN 0
+#define V4L2_STD_ALL (V4L2_STD_525_60 |\
+ V4L2_STD_625_50)
+</programlisting></para>
+
+ <table pgwide="1" id="video-standards" orient="land">
+ <title>Video Standards (based on [<xref linkend="itu470" />])</title>
+ <tgroup cols="12" colsep="1" rowsep="1" align="center">
+ <colspec colname="c1" align="left" />
+ <colspec colname="c2" />
+ <colspec colname="c3" />
+ <colspec colname="c4" />
+ <colspec colname="c5" />
+ <colspec colnum="7" colname="c7" />
+ <colspec colnum="9" colname="c9" />
+ <colspec colnum="12" colname="c12" />
+ <spanspec namest="c2" nameend="c3" spanname="m" align="center" />
+ <spanspec namest="c4" nameend="c12" spanname="x" align="center" />
+ <spanspec namest="c5" nameend="c7" spanname="b" align="center" />
+ <spanspec namest="c9" nameend="c12" spanname="s" align="center" />
+ <thead>
+ <row>
+ <entry>Characteristics</entry>
+ <entry><para>M/NTSC<footnote><para>Japan uses a standard
+similar to M/NTSC
+(V4L2_STD_NTSC_M_JP).</para></footnote></para></entry>
+ <entry>M/PAL</entry>
+ <entry><para>N/PAL<footnote><para> The values in
+brackets apply to the combination N/PAL a.k.a.
+N<subscript>C</subscript> used in Argentina
+(V4L2_STD_PAL_Nc).</para></footnote></para></entry>
+ <entry align="center">B, B1, G/PAL</entry>
+ <entry align="center">D, D1, K/PAL</entry>
+ <entry align="center">H/PAL</entry>
+ <entry align="center">I/PAL</entry>
+ <entry align="center">B, G/SECAM</entry>
+ <entry align="center">D, K/SECAM</entry>
+ <entry align="center">K1/SECAM</entry>
+ <entry align="center">L/SECAM</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row>
+ <entry>Frame lines</entry>
+ <entry spanname="m">525</entry>
+ <entry spanname="x">625</entry>
+ </row>
+ <row>
+ <entry>Frame period (s)</entry>
+ <entry spanname="m">1001/30000</entry>
+ <entry spanname="x">1/25</entry>
+ </row>
+ <row>
+ <entry>Chrominance sub-carrier frequency (Hz)</entry>
+ <entry>3579545 &plusmn;&nbsp;10</entry>
+ <entry>3579611.49 &plusmn;&nbsp;10</entry>
+ <entry>4433618.75 &plusmn;&nbsp;5 (3582056.25
+&plusmn;&nbsp;5)</entry>
+ <entry spanname="b">4433618.75 &plusmn;&nbsp;5</entry>
+ <entry>4433618.75 &plusmn;&nbsp;1</entry>
+ <entry spanname="s">f<subscript>OR</subscript>&nbsp;=
+4406250 &plusmn;&nbsp;2000, f<subscript>OB</subscript>&nbsp;= 4250000
+&plusmn;&nbsp;2000</entry>
+ </row>
+ <row>
+ <entry>Nominal radio-frequency channel bandwidth
+(MHz)</entry>
+ <entry>6</entry>
+ <entry>6</entry>
+ <entry>6</entry>
+ <entry>B: 7; B1, G: 8</entry>
+ <entry>8</entry>
+ <entry>8</entry>
+ <entry>8</entry>
+ <entry>8</entry>
+ <entry>8</entry>
+ <entry>8</entry>
+ <entry>8</entry>
+ </row>
+ <row>
+ <entry>Sound carrier relative to vision carrier
+(MHz)</entry>
+ <entry>+&nbsp;4.5</entry>
+ <entry>+&nbsp;4.5</entry>
+ <entry>+&nbsp;4.5</entry>
+ <entry><para>+&nbsp;5.5 &plusmn;&nbsp;0.001
+<footnote><para>In the Federal Republic of Germany, Austria, Italy,
+the Netherlands, Slovakia and Switzerland a system of two sound
+carriers is used, the frequency of the second carrier being
+242.1875&nbsp;kHz above the frequency of the first sound carrier. For
+stereophonic sound transmissions a similar system is used in
+Australia.</para></footnote> <footnote><para>New Zealand uses a sound
+carrier displaced 5.4996 &plusmn;&nbsp;0.0005 MHz from the vision
+carrier.</para></footnote> <footnote><para>In Denmark, Finland, New
+Zealand, Sweden and Spain a system of two sound carriers is used. In
+Iceland, Norway and Poland the same system is being introduced. The
+second carrier is 5.85&nbsp;MHz above the vision carrier and is DQPSK
+modulated with 728&nbsp;kbit/s sound and data multiplex. (NICAM
+system)</para></footnote> <footnote><para>In the United Kingdom, a
+system of two sound carriers is used. The second sound carrier is
+6.552&nbsp;MHz above the vision carrier and is DQPSK modulated with a
+728&nbsp;kbit/s sound and data multiplex able to carry two sound
+channels. (NICAM system)</para></footnote></para></entry>
+ <entry>+&nbsp;6.5 &plusmn;&nbsp;0.001</entry>
+ <entry>+&nbsp;5.5</entry>
+ <entry>+&nbsp;5.9996 &plusmn;&nbsp;0.0005</entry>
+ <entry>+&nbsp;5.5 &plusmn;&nbsp;0.001</entry>
+ <entry>+&nbsp;6.5 &plusmn;&nbsp;0.001</entry>
+ <entry>+&nbsp;6.5</entry>
+ <entry><para>+&nbsp;6.5 <footnote><para>In France, a
+digital carrier 5.85 MHz away from the vision carrier may be used in
+addition to the main sound carrier. It is modulated in differentially
+encoded QPSK with a 728 kbit/s sound and data multiplexer capable of
+carrying two sound channels. (NICAM
+system)</para></footnote></para></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The &v4l2-standard; <structfield>index</structfield>
+is out of bounds.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>ENODATA</errorcode></term>
+ <listitem>
+ <para>Standard video timings are not supported for this input or output.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-expbuf.xml b/Documentation/DocBook/media/v4l/vidioc-expbuf.xml
new file mode 100644
index 000000000..4165e7bfa
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-expbuf.xml
@@ -0,0 +1,210 @@
+<refentry id="vidioc-expbuf">
+
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_EXPBUF</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_EXPBUF</refname>
+ <refpurpose>Export a buffer as a DMABUF file descriptor.</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_exportbuffer *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_EXPBUF</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <note>
+ <title>Experimental</title>
+ <para>This is an <link linkend="experimental"> experimental </link>
+ interface and may change in the future.</para>
+ </note>
+
+<para>This ioctl is an extension to the <link linkend="mmap">memory
+mapping</link> I/O method, therefore it is available only for
+<constant>V4L2_MEMORY_MMAP</constant> buffers. It can be used to export a
+buffer as a DMABUF file at any time after buffers have been allocated with the
+&VIDIOC-REQBUFS; ioctl.</para>
+
+<para> To export a buffer, applications fill &v4l2-exportbuffer;. The
+<structfield> type </structfield> field is set to the same buffer type as was
+previously used with &v4l2-requestbuffers;<structfield> type </structfield>.
+Applications must also set the <structfield> index </structfield> field. Valid
+index numbers range from zero to the number of buffers allocated with
+&VIDIOC-REQBUFS; (&v4l2-requestbuffers;<structfield> count </structfield>)
+minus one. For the multi-planar API, applications set the <structfield> plane
+</structfield> field to the index of the plane to be exported. Valid planes
+range from zero to the maximal number of valid planes for the currently active
+format. For the single-planar API, applications must set <structfield> plane
+</structfield> to zero. Additional flags may be posted in the <structfield>
+flags </structfield> field. Refer to a manual for open() for details.
+Currently only O_CLOEXEC, O_RDONLY, O_WRONLY, and O_RDWR are supported. All
+other fields must be set to zero.
+In the case of multi-planar API, every plane is exported separately using
+multiple <constant> VIDIOC_EXPBUF </constant> calls. </para>
+
+<para> After calling <constant>VIDIOC_EXPBUF</constant> the <structfield> fd
+</structfield> field will be set by a driver. This is a DMABUF file
+descriptor. The application may pass it to other DMABUF-aware devices. Refer to
+<link linkend="dmabuf">DMABUF importing</link> for details about importing
+DMABUF files into V4L2 nodes. It is recommended to close a DMABUF file when it
+is no longer used to allow the associated memory to be reclaimed. </para>
+ </refsect1>
+
+ <refsect1>
+ <title>Examples</title>
+
+ <example>
+ <title>Exporting a buffer.</title>
+ <programlisting>
+int buffer_export(int v4lfd, &v4l2-buf-type; bt, int index, int *dmafd)
+{
+ &v4l2-exportbuffer; expbuf;
+
+ memset(&amp;expbuf, 0, sizeof(expbuf));
+ expbuf.type = bt;
+ expbuf.index = index;
+ if (ioctl(v4lfd, &VIDIOC-EXPBUF;, &amp;expbuf) == -1) {
+ perror("VIDIOC_EXPBUF");
+ return -1;
+ }
+
+ *dmafd = expbuf.fd;
+
+ return 0;
+}
+ </programlisting>
+ </example>
+
+ <example>
+ <title>Exporting a buffer using the multi-planar API.</title>
+ <programlisting>
+int buffer_export_mp(int v4lfd, &v4l2-buf-type; bt, int index,
+ int dmafd[], int n_planes)
+{
+ int i;
+
+ for (i = 0; i &lt; n_planes; ++i) {
+ &v4l2-exportbuffer; expbuf;
+
+ memset(&amp;expbuf, 0, sizeof(expbuf));
+ expbuf.type = bt;
+ expbuf.index = index;
+ expbuf.plane = i;
+ if (ioctl(v4lfd, &VIDIOC-EXPBUF;, &amp;expbuf) == -1) {
+ perror("VIDIOC_EXPBUF");
+ while (i)
+ close(dmafd[--i]);
+ return -1;
+ }
+ dmafd[i] = expbuf.fd;
+ }
+
+ return 0;
+}
+ </programlisting>
+ </example>
+
+ <table pgwide="1" frame="none" id="v4l2-exportbuffer">
+ <title>struct <structname>v4l2_exportbuffer</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>type</structfield></entry>
+ <entry>Type of the buffer, same as &v4l2-format;
+<structfield>type</structfield> or &v4l2-requestbuffers;
+<structfield>type</structfield>, set by the application. See <xref
+linkend="v4l2-buf-type" /></entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>index</structfield></entry>
+ <entry>Number of the buffer, set by the application. This field is
+only used for <link linkend="mmap">memory mapping</link> I/O and can range from
+zero to the number of buffers allocated with the &VIDIOC-REQBUFS; and/or
+&VIDIOC-CREATE-BUFS; ioctls. </entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>plane</structfield></entry>
+ <entry>Index of the plane to be exported when using the
+multi-planar API. Otherwise this value must be set to zero. </entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>flags</structfield></entry>
+ <entry>Flags for the newly created file, currently only <constant>
+O_CLOEXEC </constant>, <constant>O_RDONLY</constant>, <constant>O_WRONLY
+</constant>, and <constant>O_RDWR</constant> are supported, refer to the manual
+of open() for more details.</entry>
+ </row>
+ <row>
+ <entry>__s32</entry>
+ <entry><structfield>fd</structfield></entry>
+ <entry>The DMABUF file descriptor associated with a buffer. Set by
+ the driver.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved[11]</structfield></entry>
+ <entry>Reserved field for future use. Must be set to zero.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>A queue is not in MMAP mode or DMABUF exporting is not
+supported or <structfield> flags </structfield> or <structfield> type
+</structfield> or <structfield> index </structfield> or <structfield> plane
+</structfield> fields are invalid.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-g-audio.xml b/Documentation/DocBook/media/v4l/vidioc-g-audio.xml
new file mode 100644
index 000000000..d7bb9b373
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-g-audio.xml
@@ -0,0 +1,172 @@
+<refentry id="vidioc-g-audio">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_G_AUDIO, VIDIOC_S_AUDIO</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_G_AUDIO</refname>
+ <refname>VIDIOC_S_AUDIO</refname>
+ <refpurpose>Query or select the current audio input and its
+attributes</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_audio *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>const struct v4l2_audio *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_G_AUDIO, VIDIOC_S_AUDIO</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>To query the current audio input applications zero out the
+<structfield>reserved</structfield> array of a &v4l2-audio;
+and call the <constant>VIDIOC_G_AUDIO</constant> ioctl with a pointer
+to this structure. Drivers fill the rest of the structure or return an
+&EINVAL; when the device has no audio inputs, or none which combine
+with the current video input.</para>
+
+ <para>Audio inputs have one writable property, the audio mode. To
+select the current audio input <emphasis>and</emphasis> change the
+audio mode, applications initialize the
+<structfield>index</structfield> and <structfield>mode</structfield>
+fields, and the
+<structfield>reserved</structfield> array of a
+<structname>v4l2_audio</structname> structure and call the
+<constant>VIDIOC_S_AUDIO</constant> ioctl. Drivers may switch to a
+different audio mode if the request cannot be satisfied. However, this
+is a write-only ioctl, it does not return the actual new audio
+mode.</para>
+
+ <table pgwide="1" frame="none" id="v4l2-audio">
+ <title>struct <structname>v4l2_audio</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>index</structfield></entry>
+ <entry>Identifies the audio input, set by the
+driver or application.</entry>
+ </row>
+ <row>
+ <entry>__u8</entry>
+ <entry><structfield>name</structfield>[32]</entry>
+ <entry>Name of the audio input, a NUL-terminated ASCII
+string, for example: "Line In". This information is intended for the
+user, preferably the connector label on the device itself.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>capability</structfield></entry>
+ <entry>Audio capability flags, see <xref
+ linkend="audio-capability" />.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>mode</structfield></entry>
+ <entry>Audio mode flags set by drivers and applications (on
+ <constant>VIDIOC_S_AUDIO</constant> ioctl), see <xref linkend="audio-mode" />.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved</structfield>[2]</entry>
+ <entry>Reserved for future extensions. Drivers and
+applications must set the array to zero.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="audio-capability">
+ <title>Audio Capability Flags</title>
+ <tgroup cols="3">
+ &cs-def;
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_AUDCAP_STEREO</constant></entry>
+ <entry>0x00001</entry>
+ <entry>This is a stereo input. The flag is intended to
+automatically disable stereo recording etc. when the signal is always
+monaural. The API provides no means to detect if stereo is
+<emphasis>received</emphasis>, unless the audio input belongs to a
+tuner.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_AUDCAP_AVL</constant></entry>
+ <entry>0x00002</entry>
+ <entry>Automatic Volume Level mode is supported.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="audio-mode">
+ <title>Audio Mode Flags</title>
+ <tgroup cols="3">
+ &cs-def;
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_AUDMODE_AVL</constant></entry>
+ <entry>0x00001</entry>
+ <entry>AVL mode is on.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>No audio inputs combine with the current video input,
+or the number of the selected audio input is out of bounds or it does
+not combine.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-g-audioout.xml b/Documentation/DocBook/media/v4l/vidioc-g-audioout.xml
new file mode 100644
index 000000000..200a2704a
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-g-audioout.xml
@@ -0,0 +1,138 @@
+<refentry id="vidioc-g-audioout">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_G_AUDOUT, VIDIOC_S_AUDOUT</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_G_AUDOUT</refname>
+ <refname>VIDIOC_S_AUDOUT</refname>
+ <refpurpose>Query or select the current audio output</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_audioout *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>const struct v4l2_audioout *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_G_AUDOUT, VIDIOC_S_AUDOUT</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>To query the current audio output applications zero out the
+<structfield>reserved</structfield> array of a &v4l2-audioout; and
+call the <constant>VIDIOC_G_AUDOUT</constant> ioctl with a pointer
+to this structure. Drivers fill the rest of the structure or return an
+&EINVAL; when the device has no audio inputs, or none which combine
+with the current video output.</para>
+
+ <para>Audio outputs have no writable properties. Nevertheless, to
+select the current audio output applications can initialize the
+<structfield>index</structfield> field and
+<structfield>reserved</structfield> array (which in the future may
+contain writable properties) of a
+<structname>v4l2_audioout</structname> structure and call the
+<constant>VIDIOC_S_AUDOUT</constant> ioctl. Drivers switch to the
+requested output or return the &EINVAL; when the index is out of
+bounds. This is a write-only ioctl, it does not return the current
+audio output attributes as <constant>VIDIOC_G_AUDOUT</constant>
+does.</para>
+
+ <para>Note connectors on a TV card to loop back the received audio
+signal to a sound card are not audio outputs in this sense.</para>
+
+ <table pgwide="1" frame="none" id="v4l2-audioout">
+ <title>struct <structname>v4l2_audioout</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>index</structfield></entry>
+ <entry>Identifies the audio output, set by the
+driver or application.</entry>
+ </row>
+ <row>
+ <entry>__u8</entry>
+ <entry><structfield>name</structfield>[32]</entry>
+ <entry>Name of the audio output, a NUL-terminated ASCII
+string, for example: "Line Out". This information is intended for the
+user, preferably the connector label on the device itself.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>capability</structfield></entry>
+ <entry>Audio capability flags, none defined yet. Drivers
+must set this field to zero.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>mode</structfield></entry>
+ <entry>Audio mode, none defined yet. Drivers and
+applications (on <constant>VIDIOC_S_AUDOUT</constant>) must set this
+field to zero.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved</structfield>[2]</entry>
+ <entry>Reserved for future extensions. Drivers and
+applications must set the array to zero.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>No audio outputs combine with the current video
+output, or the number of the selected audio output is out of bounds or
+it does not combine.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-g-crop.xml b/Documentation/DocBook/media/v4l/vidioc-g-crop.xml
new file mode 100644
index 000000000..e6c4efb9e
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-g-crop.xml
@@ -0,0 +1,129 @@
+<refentry id="vidioc-g-crop">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_G_CROP, VIDIOC_S_CROP</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_G_CROP</refname>
+ <refname>VIDIOC_S_CROP</refname>
+ <refpurpose>Get or set the current cropping rectangle</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_crop *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>const struct v4l2_crop *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_G_CROP, VIDIOC_S_CROP</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>To query the cropping rectangle size and position
+applications set the <structfield>type</structfield> field of a
+<structname>v4l2_crop</structname> structure to the respective buffer
+(stream) type and call the <constant>VIDIOC_G_CROP</constant> ioctl
+with a pointer to this structure. The driver fills the rest of the
+structure or returns the &EINVAL; if cropping is not supported.</para>
+
+ <para>To change the cropping rectangle applications initialize the
+<structfield>type</structfield> and &v4l2-rect; substructure named
+<structfield>c</structfield> of a v4l2_crop structure and call the
+<constant>VIDIOC_S_CROP</constant> ioctl with a pointer to this
+structure.</para>
+
+<para>Do not use the multiplanar buffer types. Use <constant>V4L2_BUF_TYPE_VIDEO_CAPTURE</constant>
+instead of <constant>V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE</constant>
+and use <constant>V4L2_BUF_TYPE_VIDEO_OUTPUT</constant> instead of
+<constant>V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE</constant>.</para>
+
+ <para>The driver first adjusts the requested dimensions against
+hardware limits, &ie; the bounds given by the capture/output window,
+and it rounds to the closest possible values of horizontal and
+vertical offset, width and height. In particular the driver must round
+the vertical offset of the cropping rectangle to frame lines modulo
+two, such that the field order cannot be confused.</para>
+
+ <para>Second the driver adjusts the image size (the opposite
+rectangle of the scaling process, source or target depending on the
+data direction) to the closest size possible while maintaining the
+current horizontal and vertical scaling factor.</para>
+
+ <para>Finally the driver programs the hardware with the actual
+cropping and image parameters. <constant>VIDIOC_S_CROP</constant> is a
+write-only ioctl, it does not return the actual parameters. To query
+them applications must call <constant>VIDIOC_G_CROP</constant> and
+&VIDIOC-G-FMT;. When the parameters are unsuitable the application may
+modify the cropping or image parameters and repeat the cycle until
+satisfactory parameters have been negotiated.</para>
+
+ <para>When cropping is not supported then no parameters are
+changed and <constant>VIDIOC_S_CROP</constant> returns the
+&EINVAL;.</para>
+
+ <table pgwide="1" frame="none" id="v4l2-crop">
+ <title>struct <structname>v4l2_crop</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>type</structfield></entry>
+ <entry>Type of the data stream, set by the application.
+Only these types are valid here: <constant>V4L2_BUF_TYPE_VIDEO_CAPTURE</constant>,
+<constant>V4L2_BUF_TYPE_VIDEO_OUTPUT</constant> and
+<constant>V4L2_BUF_TYPE_VIDEO_OVERLAY</constant>. See <xref linkend="v4l2-buf-type" />.</entry>
+ </row>
+ <row>
+ <entry>&v4l2-rect;</entry>
+ <entry><structfield>c</structfield></entry>
+ <entry>Cropping rectangle. The same co-ordinate system as
+for &v4l2-cropcap; <structfield>bounds</structfield> is used.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-g-ctrl.xml b/Documentation/DocBook/media/v4l/vidioc-g-ctrl.xml
new file mode 100644
index 000000000..ee2820d6c
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-g-ctrl.xml
@@ -0,0 +1,133 @@
+<refentry id="vidioc-g-ctrl">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_G_CTRL, VIDIOC_S_CTRL</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_G_CTRL</refname>
+ <refname>VIDIOC_S_CTRL</refname>
+ <refpurpose>Get or set the value of a control</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_control
+*<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_G_CTRL, VIDIOC_S_CTRL</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>To get the current value of a control applications
+initialize the <structfield>id</structfield> field of a struct
+<structname>v4l2_control</structname> and call the
+<constant>VIDIOC_G_CTRL</constant> ioctl with a pointer to this
+structure. To change the value of a control applications initialize
+the <structfield>id</structfield> and <structfield>value</structfield>
+fields of a struct <structname>v4l2_control</structname> and call the
+<constant>VIDIOC_S_CTRL</constant> ioctl.</para>
+
+ <para>When the <structfield>id</structfield> is invalid drivers
+return an &EINVAL;. When the <structfield>value</structfield> is out
+of bounds drivers can choose to take the closest valid value or return
+an &ERANGE;, whatever seems more appropriate. However,
+<constant>VIDIOC_S_CTRL</constant> is a write-only ioctl, it does not
+return the actual new value. If the <structfield>value</structfield>
+is inappropriate for the control (e.g. if it refers to an unsupported
+menu index of a menu control), then &EINVAL; is returned as well.</para>
+
+ <para>These ioctls work only with user controls. For other
+control classes the &VIDIOC-G-EXT-CTRLS;, &VIDIOC-S-EXT-CTRLS; or
+&VIDIOC-TRY-EXT-CTRLS; must be used.</para>
+
+ <table pgwide="1" frame="none" id="v4l2-control">
+ <title>struct <structname>v4l2_control</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>id</structfield></entry>
+ <entry>Identifies the control, set by the
+application.</entry>
+ </row>
+ <row>
+ <entry>__s32</entry>
+ <entry><structfield>value</structfield></entry>
+ <entry>New value or current value.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The &v4l2-control; <structfield>id</structfield> is
+invalid or the <structfield>value</structfield> is inappropriate for
+the given control (i.e. if a menu item is selected that is not supported
+by the driver according to &VIDIOC-QUERYMENU;).</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>ERANGE</errorcode></term>
+ <listitem>
+ <para>The &v4l2-control; <structfield>value</structfield>
+is out of bounds.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EBUSY</errorcode></term>
+ <listitem>
+ <para>The control is temporarily not changeable, possibly
+because another applications took over control of the device function
+this control belongs to.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EACCES</errorcode></term>
+ <listitem>
+ <para>Attempt to set a read-only control or to get a
+ write-only control.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-g-dv-timings.xml b/Documentation/DocBook/media/v4l/vidioc-g-dv-timings.xml
new file mode 100644
index 000000000..764b635ed
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-g-dv-timings.xml
@@ -0,0 +1,341 @@
+<refentry id="vidioc-g-dv-timings">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_G_DV_TIMINGS, VIDIOC_S_DV_TIMINGS</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_G_DV_TIMINGS</refname>
+ <refname>VIDIOC_S_DV_TIMINGS</refname>
+ <refpurpose>Get or set DV timings for input or output</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_dv_timings *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_G_DV_TIMINGS, VIDIOC_S_DV_TIMINGS</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+ <para>To set DV timings for the input or output, applications use the
+<constant>VIDIOC_S_DV_TIMINGS</constant> ioctl and to get the current timings,
+applications use the <constant>VIDIOC_G_DV_TIMINGS</constant> ioctl. The detailed timing
+information is filled in using the structure &v4l2-dv-timings;. These ioctls take
+a pointer to the &v4l2-dv-timings; structure as argument. If the ioctl is not supported
+or the timing values are not correct, the driver returns &EINVAL;.</para>
+<para>The <filename>linux/v4l2-dv-timings.h</filename> header can be used to get the
+timings of the formats in the <xref linkend="cea861" /> and <xref linkend="vesadmt" />
+standards. If the current input or output does not support DV timings (e.g. if
+&VIDIOC-ENUMINPUT; does not set the <constant>V4L2_IN_CAP_DV_TIMINGS</constant> flag), then
+&ENODATA; is returned.</para>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>This ioctl is not supported, or the
+<constant>VIDIOC_S_DV_TIMINGS</constant> parameter was unsuitable.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>ENODATA</errorcode></term>
+ <listitem>
+ <para>Digital video timings are not supported for this input or output.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EBUSY</errorcode></term>
+ <listitem>
+ <para>The device is busy and therefore can not change the timings.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+
+ <table pgwide="1" frame="none" id="v4l2-bt-timings">
+ <title>struct <structname>v4l2_bt_timings</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>width</structfield></entry>
+ <entry>Width of the active video in pixels.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>height</structfield></entry>
+ <entry>Height of the active video frame in lines. So for interlaced formats the
+ height of the active video in each field is <structfield>height</structfield>/2.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>interlaced</structfield></entry>
+ <entry>Progressive (0) or interlaced (1)</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>polarities</structfield></entry>
+ <entry>This is a bit mask that defines polarities of sync signals.
+bit 0 (V4L2_DV_VSYNC_POS_POL) is for vertical sync polarity and bit 1 (V4L2_DV_HSYNC_POS_POL) is for horizontal sync polarity. If the bit is set
+(1) it is positive polarity and if is cleared (0), it is negative polarity.</entry>
+ </row>
+ <row>
+ <entry>__u64</entry>
+ <entry><structfield>pixelclock</structfield></entry>
+ <entry>Pixel clock in Hz. Ex. 74.25MHz->74250000</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>hfrontporch</structfield></entry>
+ <entry>Horizontal front porch in pixels</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>hsync</structfield></entry>
+ <entry>Horizontal sync length in pixels</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>hbackporch</structfield></entry>
+ <entry>Horizontal back porch in pixels</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>vfrontporch</structfield></entry>
+ <entry>Vertical front porch in lines. For interlaced formats this refers to the
+ odd field (aka field 1).</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>vsync</structfield></entry>
+ <entry>Vertical sync length in lines. For interlaced formats this refers to the
+ odd field (aka field 1).</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>vbackporch</structfield></entry>
+ <entry>Vertical back porch in lines. For interlaced formats this refers to the
+ odd field (aka field 1).</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>il_vfrontporch</structfield></entry>
+ <entry>Vertical front porch in lines for the even field (aka field 2) of
+ interlaced field formats. Must be 0 for progressive formats.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>il_vsync</structfield></entry>
+ <entry>Vertical sync length in lines for the even field (aka field 2) of
+ interlaced field formats. Must be 0 for progressive formats.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>il_vbackporch</structfield></entry>
+ <entry>Vertical back porch in lines for the even field (aka field 2) of
+ interlaced field formats. Must be 0 for progressive formats.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>standards</structfield></entry>
+ <entry>The video standard(s) this format belongs to. This will be filled in by
+ the driver. Applications must set this to 0. See <xref linkend="dv-bt-standards"/>
+ for a list of standards.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>flags</structfield></entry>
+ <entry>Several flags giving more information about the format.
+ See <xref linkend="dv-bt-flags"/> for a description of the flags.
+ </entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="v4l2-dv-timings">
+ <title>struct <structname>v4l2_dv_timings</structname></title>
+ <tgroup cols="4">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>type</structfield></entry>
+ <entry></entry>
+ <entry>Type of DV timings as listed in <xref linkend="dv-timing-types"/>.</entry>
+ </row>
+ <row>
+ <entry>union</entry>
+ <entry><structfield></structfield></entry>
+ <entry></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>&v4l2-bt-timings;</entry>
+ <entry><structfield>bt</structfield></entry>
+ <entry>Timings defined by BT.656/1120 specifications</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>__u32</entry>
+ <entry><structfield>reserved</structfield>[32]</entry>
+ <entry></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="dv-timing-types">
+ <title>DV Timing types</title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>Timing type</entry>
+ <entry>value</entry>
+ <entry>Description</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ </row>
+ <row>
+ <entry>V4L2_DV_BT_656_1120</entry>
+ <entry>0</entry>
+ <entry>BT.656/1120 timings</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ <table pgwide="1" frame="none" id="dv-bt-standards">
+ <title>DV BT Timing standards</title>
+ <tgroup cols="2">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>Timing standard</entry>
+ <entry>Description</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ </row>
+ <row>
+ <entry>V4L2_DV_BT_STD_CEA861</entry>
+ <entry>The timings follow the CEA-861 Digital TV Profile standard</entry>
+ </row>
+ <row>
+ <entry>V4L2_DV_BT_STD_DMT</entry>
+ <entry>The timings follow the VESA Discrete Monitor Timings standard</entry>
+ </row>
+ <row>
+ <entry>V4L2_DV_BT_STD_CVT</entry>
+ <entry>The timings follow the VESA Coordinated Video Timings standard</entry>
+ </row>
+ <row>
+ <entry>V4L2_DV_BT_STD_GTF</entry>
+ <entry>The timings follow the VESA Generalized Timings Formula standard</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ <table pgwide="1" frame="none" id="dv-bt-flags">
+ <title>DV BT Timing flags</title>
+ <tgroup cols="2">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>Flag</entry>
+ <entry>Description</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ </row>
+ <row>
+ <entry>V4L2_DV_FL_REDUCED_BLANKING</entry>
+ <entry>CVT/GTF specific: the timings use reduced blanking (CVT) or the 'Secondary
+GTF' curve (GTF). In both cases the horizontal and/or vertical blanking
+intervals are reduced, allowing a higher resolution over the same
+bandwidth. This is a read-only flag, applications must not set this.
+ </entry>
+ </row>
+ <row>
+ <entry>V4L2_DV_FL_CAN_REDUCE_FPS</entry>
+ <entry>CEA-861 specific: set for CEA-861 formats with a framerate that is a multiple
+of six. These formats can be optionally played at 1 / 1.001 speed to
+be compatible with 60 Hz based standards such as NTSC and PAL-M that use a framerate of
+29.97 frames per second. If the transmitter can't generate such frequencies, then the
+flag will also be cleared. This is a read-only flag, applications must not set this.
+ </entry>
+ </row>
+ <row>
+ <entry>V4L2_DV_FL_REDUCED_FPS</entry>
+ <entry>CEA-861 specific: only valid for video transmitters, the flag is cleared
+by receivers. It is also only valid for formats with the V4L2_DV_FL_CAN_REDUCE_FPS flag
+set, for other formats the flag will be cleared by the driver.
+
+If the application sets this flag, then the pixelclock used to set up the transmitter is
+divided by 1.001 to make it compatible with NTSC framerates. If the transmitter
+can't generate such frequencies, then the flag will also be cleared.
+ </entry>
+ </row>
+ <row>
+ <entry>V4L2_DV_FL_HALF_LINE</entry>
+ <entry>Specific to interlaced formats: if set, then the vertical frontporch
+of field 1 (aka the odd field) is really one half-line longer and the vertical backporch
+of field 2 (aka the even field) is really one half-line shorter, so each field has exactly
+the same number of half-lines. Whether half-lines can be detected or used depends on
+the hardware.
+ </entry>
+ </row>
+ <row>
+ <entry>V4L2_DV_FL_IS_CE_VIDEO</entry>
+ <entry>If set, then this is a Consumer Electronics (CE) video format.
+Such formats differ from other formats (commonly called IT formats) in that if
+R'G'B' encoding is used then by default the R'G'B' values use limited range
+(i.e. 16-235) as opposed to full range (i.e. 0-255). All formats defined in CEA-861
+except for the 640x480p59.94 format are CE formats.
+ </entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-g-edid.xml b/Documentation/DocBook/media/v4l/vidioc-g-edid.xml
new file mode 100644
index 000000000..6df40db4c
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-g-edid.xml
@@ -0,0 +1,162 @@
+<refentry id="vidioc-g-edid">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_G_EDID, VIDIOC_S_EDID</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_G_EDID</refname>
+ <refname>VIDIOC_S_EDID</refname>
+ <refpurpose>Get or set the EDID of a video receiver/transmitter</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_edid *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_edid *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_G_EDID, VIDIOC_S_EDID</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+ <para>These ioctls can be used to get or set an EDID associated with an input
+ from a receiver or an output of a transmitter device. They can be
+ used with subdevice nodes (/dev/v4l-subdevX) or with video nodes (/dev/videoX).</para>
+
+ <para>When used with video nodes the <structfield>pad</structfield> field represents the
+ input (for video capture devices) or output (for video output devices) index as
+ is returned by &VIDIOC-ENUMINPUT; and &VIDIOC-ENUMOUTPUT; respectively. When used
+ with subdevice nodes the <structfield>pad</structfield> field represents the
+ input or output pad of the subdevice. If there is no EDID support for the given
+ <structfield>pad</structfield> value, then the &EINVAL; will be returned.</para>
+
+ <para>To get the EDID data the application has to fill in the <structfield>pad</structfield>,
+ <structfield>start_block</structfield>, <structfield>blocks</structfield> and <structfield>edid</structfield>
+ fields and call <constant>VIDIOC_G_EDID</constant>. The current EDID from block
+ <structfield>start_block</structfield> and of size <structfield>blocks</structfield>
+ will be placed in the memory <structfield>edid</structfield> points to. The <structfield>edid</structfield>
+ pointer must point to memory at least <structfield>blocks</structfield>&nbsp;*&nbsp;128 bytes
+ large (the size of one block is 128 bytes).</para>
+
+ <para>If there are fewer blocks than specified, then the driver will set <structfield>blocks</structfield>
+ to the actual number of blocks. If there are no EDID blocks available at all, then the error code
+ ENODATA is set.</para>
+
+ <para>If blocks have to be retrieved from the sink, then this call will block until they
+ have been read.</para>
+
+ <para>To set the EDID blocks of a receiver the application has to fill in the <structfield>pad</structfield>,
+ <structfield>blocks</structfield> and <structfield>edid</structfield> fields and set
+ <structfield>start_block</structfield> to 0. It is not possible to set part of an EDID,
+ it is always all or nothing. Setting the EDID data is only valid for receivers as it makes
+ no sense for a transmitter.</para>
+
+ <para>The driver assumes that the full EDID is passed in. If there are more EDID blocks than
+ the hardware can handle then the EDID is not written, but instead the error code E2BIG is set
+ and <structfield>blocks</structfield> is set to the maximum that the hardware supports.
+ If <structfield>start_block</structfield> is any
+ value other than 0 then the error code EINVAL is set.</para>
+
+ <para>To disable an EDID you set <structfield>blocks</structfield> to 0. Depending on the
+ hardware this will drive the hotplug pin low and/or block the source from reading the EDID
+ data in some way. In any case, the end result is the same: the EDID is no longer available.
+ </para>
+
+ <table pgwide="1" frame="none" id="v4l2-edid">
+ <title>struct <structname>v4l2_edid</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>pad</structfield></entry>
+ <entry>Pad for which to get/set the EDID blocks. When used with a video device
+ node the pad represents the input or output index as returned by
+ &VIDIOC-ENUMINPUT; and &VIDIOC-ENUMOUTPUT; respectively.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>start_block</structfield></entry>
+ <entry>Read the EDID from starting with this block. Must be 0 when setting
+ the EDID.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>blocks</structfield></entry>
+ <entry>The number of blocks to get or set. Must be less or equal to 256 (the
+ maximum number of blocks as defined by the standard). When you set the EDID and
+ <structfield>blocks</structfield> is 0, then the EDID is disabled or erased.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved</structfield>[5]</entry>
+ <entry>Reserved for future extensions. Applications and drivers must
+ set the array to zero.</entry>
+ </row>
+ <row>
+ <entry>__u8&nbsp;*</entry>
+ <entry><structfield>edid</structfield></entry>
+ <entry>Pointer to memory that contains the EDID. The minimum size is
+ <structfield>blocks</structfield>&nbsp;*&nbsp;128.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>ENODATA</errorcode></term>
+ <listitem>
+ <para>The EDID data is not available.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>E2BIG</errorcode></term>
+ <listitem>
+ <para>The EDID data you provided is more than the hardware can handle.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-g-enc-index.xml b/Documentation/DocBook/media/v4l/vidioc-g-enc-index.xml
new file mode 100644
index 000000000..be25029a1
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-g-enc-index.xml
@@ -0,0 +1,189 @@
+<refentry id="vidioc-g-enc-index">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_G_ENC_INDEX</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_G_ENC_INDEX</refname>
+ <refpurpose>Get meta data about a compressed video stream</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_enc_idx *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_G_ENC_INDEX</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>The <constant>VIDIOC_G_ENC_INDEX</constant> ioctl provides
+meta data about a compressed video stream the same or another
+application currently reads from the driver, which is useful for
+random access into the stream without decoding it.</para>
+
+ <para>To read the data applications must call
+<constant>VIDIOC_G_ENC_INDEX</constant> with a pointer to a
+&v4l2-enc-idx;. On success the driver fills the
+<structfield>entry</structfield> array, stores the number of elements
+written in the <structfield>entries</structfield> field, and
+initializes the <structfield>entries_cap</structfield> field.</para>
+
+ <para>Each element of the <structfield>entry</structfield> array
+contains meta data about one picture. A
+<constant>VIDIOC_G_ENC_INDEX</constant> call reads up to
+<constant>V4L2_ENC_IDX_ENTRIES</constant> entries from a driver
+buffer, which can hold up to <structfield>entries_cap</structfield>
+entries. This number can be lower or higher than
+<constant>V4L2_ENC_IDX_ENTRIES</constant>, but not zero. When the
+application fails to read the meta data in time the oldest entries
+will be lost. When the buffer is empty or no capturing/encoding is in
+progress, <structfield>entries</structfield> will be zero.</para>
+
+ <para>Currently this ioctl is only defined for MPEG-2 program
+streams and video elementary streams.</para>
+
+ <table pgwide="1" frame="none" id="v4l2-enc-idx">
+ <title>struct <structname>v4l2_enc_idx</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>entries</structfield></entry>
+ <entry>The number of entries the driver stored in the
+<structfield>entry</structfield> array.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>entries_cap</structfield></entry>
+ <entry>The number of entries the driver can
+buffer. Must be greater than zero.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved</structfield>[4]</entry>
+ <entry spanname="hspan">Reserved for future extensions.
+Drivers must set the array to zero.</entry>
+ </row>
+ <row>
+ <entry>&v4l2-enc-idx-entry;</entry>
+ <entry><structfield>entry</structfield>[<constant>V4L2_ENC_IDX_ENTRIES</constant>]</entry>
+ <entry>Meta data about a compressed video stream. Each
+element of the array corresponds to one picture, sorted in ascending
+order by their <structfield>offset</structfield>.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="v4l2-enc-idx-entry">
+ <title>struct <structname>v4l2_enc_idx_entry</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u64</entry>
+ <entry><structfield>offset</structfield></entry>
+ <entry>The offset in bytes from the beginning of the
+compressed video stream to the beginning of this picture, that is a
+<wordasword>PES packet header</wordasword> as defined in <xref
+ linkend="mpeg2part1" /> or a <wordasword>picture
+header</wordasword> as defined in <xref linkend="mpeg2part2" />. When
+the encoder is stopped, the driver resets the offset to zero.</entry>
+ </row>
+ <row>
+ <entry>__u64</entry>
+ <entry><structfield>pts</structfield></entry>
+ <entry>The 33 bit <wordasword>Presentation Time
+Stamp</wordasword> of this picture as defined in <xref
+ linkend="mpeg2part1" />.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>length</structfield></entry>
+ <entry>The length of this picture in bytes.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>flags</structfield></entry>
+ <entry>Flags containing the coding type of this picture, see <xref
+ linkend="enc-idx-flags" />.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved</structfield>[2]</entry>
+ <entry>Reserved for future extensions.
+Drivers must set the array to zero.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="enc-idx-flags">
+ <title>Index Entry Flags</title>
+ <tgroup cols="3">
+ &cs-def;
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_ENC_IDX_FRAME_I</constant></entry>
+ <entry>0x00</entry>
+ <entry>This is an Intra-coded picture.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_ENC_IDX_FRAME_P</constant></entry>
+ <entry>0x01</entry>
+ <entry>This is a Predictive-coded picture.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_ENC_IDX_FRAME_B</constant></entry>
+ <entry>0x02</entry>
+ <entry>This is a Bidirectionally predictive-coded
+picture.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_ENC_IDX_FRAME_MASK</constant></entry>
+ <entry>0x0F</entry>
+ <entry><wordasword>AND</wordasword> the flags field with
+this mask to obtain the picture coding type.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-g-ext-ctrls.xml b/Documentation/DocBook/media/v4l/vidioc-g-ext-ctrls.xml
new file mode 100644
index 000000000..c5bdbfcc4
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-g-ext-ctrls.xml
@@ -0,0 +1,427 @@
+<refentry id="vidioc-g-ext-ctrls">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_G_EXT_CTRLS, VIDIOC_S_EXT_CTRLS,
+VIDIOC_TRY_EXT_CTRLS</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_G_EXT_CTRLS</refname>
+ <refname>VIDIOC_S_EXT_CTRLS</refname>
+ <refname>VIDIOC_TRY_EXT_CTRLS</refname>
+ <refpurpose>Get or set the value of several controls, try control
+values</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_ext_controls
+*<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_G_EXT_CTRLS, VIDIOC_S_EXT_CTRLS,
+VIDIOC_TRY_EXT_CTRLS</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>These ioctls allow the caller to get or set multiple
+controls atomically. Control IDs are grouped into control classes (see
+<xref linkend="ctrl-class" />) and all controls in the control array
+must belong to the same control class.</para>
+
+ <para>Applications must always fill in the
+<structfield>count</structfield>,
+<structfield>ctrl_class</structfield>,
+<structfield>controls</structfield> and
+<structfield>reserved</structfield> fields of &v4l2-ext-controls;, and
+initialize the &v4l2-ext-control; array pointed to by the
+<structfield>controls</structfield> fields.</para>
+
+ <para>To get the current value of a set of controls applications
+initialize the <structfield>id</structfield>,
+<structfield>size</structfield> and <structfield>reserved2</structfield> fields
+of each &v4l2-ext-control; and call the
+<constant>VIDIOC_G_EXT_CTRLS</constant> ioctl. String controls controls
+must also set the <structfield>string</structfield> field. Controls
+of compound types (<constant>V4L2_CTRL_FLAG_HAS_PAYLOAD</constant> is set)
+must set the <structfield>ptr</structfield> field.</para>
+
+ <para>If the <structfield>size</structfield> is too small to
+receive the control result (only relevant for pointer-type controls
+like strings), then the driver will set <structfield>size</structfield>
+to a valid value and return an &ENOSPC;. You should re-allocate the
+memory to this new size and try again. For the string type it is possible that
+the same issue occurs again if the string has grown in the meantime. It is
+recommended to call &VIDIOC-QUERYCTRL; first and use
+<structfield>maximum</structfield>+1 as the new <structfield>size</structfield>
+value. It is guaranteed that that is sufficient memory.
+</para>
+
+ <para>N-dimensional arrays are set and retrieved row-by-row. You cannot set a partial
+array, all elements have to be set or retrieved. The total size is calculated
+as <structfield>elems</structfield> * <structfield>elem_size</structfield>.
+These values can be obtained by calling &VIDIOC-QUERY-EXT-CTRL;.</para>
+
+ <para>To change the value of a set of controls applications
+initialize the <structfield>id</structfield>, <structfield>size</structfield>,
+<structfield>reserved2</structfield> and
+<structfield>value/value64/string/ptr</structfield> fields of each &v4l2-ext-control; and
+call the <constant>VIDIOC_S_EXT_CTRLS</constant> ioctl. The controls
+will only be set if <emphasis>all</emphasis> control values are
+valid.</para>
+
+ <para>To check if a set of controls have correct values applications
+initialize the <structfield>id</structfield>, <structfield>size</structfield>,
+<structfield>reserved2</structfield> and
+<structfield>value/value64/string/ptr</structfield> fields of each &v4l2-ext-control; and
+call the <constant>VIDIOC_TRY_EXT_CTRLS</constant> ioctl. It is up to
+the driver whether wrong values are automatically adjusted to a valid
+value or if an error is returned.</para>
+
+ <para>When the <structfield>id</structfield> or
+<structfield>ctrl_class</structfield> is invalid drivers return an
+&EINVAL;. When the value is out of bounds drivers can choose to take
+the closest valid value or return an &ERANGE;, whatever seems more
+appropriate. In the first case the new value is set in
+&v4l2-ext-control;. If the new control value is inappropriate (e.g. the
+given menu index is not supported by the menu control), then this will
+also result in an &EINVAL; error.</para>
+
+ <para>The driver will only set/get these controls if all control
+values are correct. This prevents the situation where only some of the
+controls were set/get. Only low-level errors (&eg; a failed i2c
+command) can still cause this situation.</para>
+
+ <table pgwide="1" frame="none" id="v4l2-ext-control">
+ <title>struct <structname>v4l2_ext_control</structname></title>
+ <tgroup cols="4">
+ &cs-ustr;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>id</structfield></entry>
+ <entry></entry>
+ <entry>Identifies the control, set by the
+application.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>size</structfield></entry>
+ <entry></entry>
+ <entry>The total size in bytes of the payload of this
+control. This is normally 0, but for pointer controls this should be
+set to the size of the memory containing the payload, or that will
+receive the payload. If <constant>VIDIOC_G_EXT_CTRLS</constant> finds
+that this value is less than is required to store
+the payload result, then it is set to a value large enough to store the
+payload result and ENOSPC is returned. Note that for string controls
+this <structfield>size</structfield> field should not be confused with the length of the string.
+This field refers to the size of the memory that contains the string.
+The actual <emphasis>length</emphasis> of the string may well be much smaller.
+</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved2</structfield>[1]</entry>
+ <entry></entry>
+ <entry>Reserved for future extensions. Drivers and
+applications must set the array to zero.</entry>
+ </row>
+ <row>
+ <entry>union</entry>
+ <entry>(anonymous)</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>__s32</entry>
+ <entry><structfield>value</structfield></entry>
+ <entry>New value or current value. Valid if this control is not of
+type <constant>V4L2_CTRL_TYPE_INTEGER64</constant> and
+<constant>V4L2_CTRL_FLAG_HAS_PAYLOAD</constant> is not set.</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>__s64</entry>
+ <entry><structfield>value64</structfield></entry>
+ <entry>New value or current value. Valid if this control is of
+type <constant>V4L2_CTRL_TYPE_INTEGER64</constant> and
+<constant>V4L2_CTRL_FLAG_HAS_PAYLOAD</constant> is not set.</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>char *</entry>
+ <entry><structfield>string</structfield></entry>
+ <entry>A pointer to a string. Valid if this control is of
+type <constant>V4L2_CTRL_TYPE_STRING</constant>.</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>__u8 *</entry>
+ <entry><structfield>p_u8</structfield></entry>
+ <entry>A pointer to a matrix control of unsigned 8-bit values.
+Valid if this control is of type <constant>V4L2_CTRL_TYPE_U8</constant>.</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>__u16 *</entry>
+ <entry><structfield>p_u16</structfield></entry>
+ <entry>A pointer to a matrix control of unsigned 16-bit values.
+Valid if this control is of type <constant>V4L2_CTRL_TYPE_U16</constant>.</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>void *</entry>
+ <entry><structfield>ptr</structfield></entry>
+ <entry>A pointer to a compound type which can be an N-dimensional array and/or a
+compound type (the control's type is >= <constant>V4L2_CTRL_COMPOUND_TYPES</constant>).
+Valid if <constant>V4L2_CTRL_FLAG_HAS_PAYLOAD</constant> is set for this control.
+</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="v4l2-ext-controls">
+ <title>struct <structname>v4l2_ext_controls</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>ctrl_class</structfield></entry>
+ <entry>The control class to which all controls belong, see
+<xref linkend="ctrl-class" />. Drivers that use a kernel framework for handling
+controls will also accept a value of 0 here, meaning that the controls can
+belong to any control class. Whether drivers support this can be tested by setting
+<structfield>ctrl_class</structfield> to 0 and calling <constant>VIDIOC_TRY_EXT_CTRLS</constant>
+with a <structfield>count</structfield> of 0. If that succeeds, then the driver
+supports this feature.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>count</structfield></entry>
+ <entry>The number of controls in the controls array. May
+also be zero.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>error_idx</structfield></entry>
+ <entry><para>Set by the driver in case of an error. If the error is
+associated with a particular control, then <structfield>error_idx</structfield>
+is set to the index of that control. If the error is not related to a specific
+control, or the validation step failed (see below), then
+<structfield>error_idx</structfield> is set to <structfield>count</structfield>.
+The value is undefined if the ioctl returned 0 (success).</para>
+
+<para>Before controls are read from/written to hardware a validation step
+takes place: this checks if all controls in the list are valid controls,
+if no attempt is made to write to a read-only control or read from a write-only
+control, and any other up-front checks that can be done without accessing the
+hardware. The exact validations done during this step are driver dependent
+since some checks might require hardware access for some devices, thus making
+it impossible to do those checks up-front. However, drivers should make a
+best-effort to do as many up-front checks as possible.</para>
+
+<para>This check is done to avoid leaving the hardware in an inconsistent state due
+to easy-to-avoid problems. But it leads to another problem: the application needs to
+know whether an error came from the validation step (meaning that the hardware
+was not touched) or from an error during the actual reading from/writing to hardware.</para>
+
+<para>The, in hindsight quite poor, solution for that is to set <structfield>error_idx</structfield>
+to <structfield>count</structfield> if the validation failed. This has the
+unfortunate side-effect that it is not possible to see which control failed the
+validation. If the validation was successful and the error happened while
+accessing the hardware, then <structfield>error_idx</structfield> is less than
+<structfield>count</structfield> and only the controls up to
+<structfield>error_idx-1</structfield> were read or written correctly, and the
+state of the remaining controls is undefined.</para>
+
+<para>Since <constant>VIDIOC_TRY_EXT_CTRLS</constant> does not access hardware
+there is also no need to handle the validation step in this special way,
+so <structfield>error_idx</structfield> will just be set to the control that
+failed the validation step instead of to <structfield>count</structfield>.
+This means that if <constant>VIDIOC_S_EXT_CTRLS</constant> fails with
+<structfield>error_idx</structfield> set to <structfield>count</structfield>,
+then you can call <constant>VIDIOC_TRY_EXT_CTRLS</constant> to try to discover
+the actual control that failed the validation step. Unfortunately, there
+is no <constant>TRY</constant> equivalent for <constant>VIDIOC_G_EXT_CTRLS</constant>.
+</para></entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved</structfield>[2]</entry>
+ <entry>Reserved for future extensions. Drivers and
+applications must set the array to zero.</entry>
+ </row>
+ <row>
+ <entry>&v4l2-ext-control; *</entry>
+ <entry><structfield>controls</structfield></entry>
+ <entry>Pointer to an array of
+<structfield>count</structfield> v4l2_ext_control structures. Ignored
+if <structfield>count</structfield> equals zero.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="ctrl-class">
+ <title>Control classes</title>
+ <tgroup cols="3">
+ &cs-def;
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_CTRL_CLASS_USER</constant></entry>
+ <entry>0x980000</entry>
+ <entry>The class containing user controls. These controls
+are described in <xref linkend="control" />. All controls that can be set
+using the &VIDIOC-S-CTRL; and &VIDIOC-G-CTRL; ioctl belong to this
+class.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CTRL_CLASS_MPEG</constant></entry>
+ <entry>0x990000</entry>
+ <entry>The class containing MPEG compression controls.
+These controls are described in <xref
+ linkend="mpeg-controls" />.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CTRL_CLASS_CAMERA</constant></entry>
+ <entry>0x9a0000</entry>
+ <entry>The class containing camera controls.
+These controls are described in <xref
+ linkend="camera-controls" />.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CTRL_CLASS_FM_TX</constant></entry>
+ <entry>0x9b0000</entry>
+ <entry>The class containing FM Transmitter (FM TX) controls.
+These controls are described in <xref
+ linkend="fm-tx-controls" />.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CTRL_CLASS_FLASH</constant></entry>
+ <entry>0x9c0000</entry>
+ <entry>The class containing flash device controls.
+These controls are described in <xref
+ linkend="flash-controls" />.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CTRL_CLASS_JPEG</constant></entry>
+ <entry>0x9d0000</entry>
+ <entry>The class containing JPEG compression controls.
+These controls are described in <xref
+ linkend="jpeg-controls" />.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CTRL_CLASS_IMAGE_SOURCE</constant></entry>
+ <entry>0x9e0000</entry> <entry>The class containing image
+ source controls. These controls are described in <xref
+ linkend="image-source-controls" />.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CTRL_CLASS_IMAGE_PROC</constant></entry>
+ <entry>0x9f0000</entry> <entry>The class containing image
+ processing controls. These controls are described in <xref
+ linkend="image-process-controls" />.</entry>
+ </row>
+
+ <row>
+ <entry><constant>V4L2_CTRL_CLASS_FM_RX</constant></entry>
+ <entry>0xa10000</entry>
+ <entry>The class containing FM Receiver (FM RX) controls.
+These controls are described in <xref
+ linkend="fm-rx-controls" />.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CTRL_CLASS_RF_TUNER</constant></entry>
+ <entry>0xa20000</entry>
+ <entry>The class containing RF tuner controls.
+These controls are described in <xref linkend="rf-tuner-controls" />.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The &v4l2-ext-control; <structfield>id</structfield>
+is invalid, the &v4l2-ext-controls;
+<structfield>ctrl_class</structfield> is invalid, or the &v4l2-ext-control;
+<structfield>value</structfield> was inappropriate (e.g. the given menu
+index is not supported by the driver). This error code is
+also returned by the <constant>VIDIOC_S_EXT_CTRLS</constant> and
+<constant>VIDIOC_TRY_EXT_CTRLS</constant> ioctls if two or more
+control values are in conflict.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>ERANGE</errorcode></term>
+ <listitem>
+ <para>The &v4l2-ext-control; <structfield>value</structfield>
+is out of bounds.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EBUSY</errorcode></term>
+ <listitem>
+ <para>The control is temporarily not changeable, possibly
+because another applications took over control of the device function
+this control belongs to.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>ENOSPC</errorcode></term>
+ <listitem>
+ <para>The space reserved for the control's payload is insufficient.
+The field <structfield>size</structfield> is set to a value that is enough
+to store the payload and this error code is returned.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EACCES</errorcode></term>
+ <listitem>
+ <para>Attempt to try or set a read-only control or to get a
+ write-only control.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
+
diff --git a/Documentation/DocBook/media/v4l/vidioc-g-fbuf.xml b/Documentation/DocBook/media/v4l/vidioc-g-fbuf.xml
new file mode 100644
index 000000000..77607cc19
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-g-fbuf.xml
@@ -0,0 +1,459 @@
+<refentry id="vidioc-g-fbuf">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_G_FBUF, VIDIOC_S_FBUF</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_G_FBUF</refname>
+ <refname>VIDIOC_S_FBUF</refname>
+ <refpurpose>Get or set frame buffer overlay parameters</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_framebuffer *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>const struct v4l2_framebuffer *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_G_FBUF, VIDIOC_S_FBUF</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>Applications can use the <constant>VIDIOC_G_FBUF</constant> and
+<constant>VIDIOC_S_FBUF</constant> ioctl to get and set the
+framebuffer parameters for a <link linkend="overlay">Video
+Overlay</link> or <link linkend="osd">Video Output Overlay</link>
+(OSD). The type of overlay is implied by the device type (capture or
+output device) and can be determined with the &VIDIOC-QUERYCAP; ioctl.
+One <filename>/dev/videoN</filename> device must not support both
+kinds of overlay.</para>
+
+ <para>The V4L2 API distinguishes destructive and non-destructive
+overlays. A destructive overlay copies captured video images into the
+video memory of a graphics card. A non-destructive overlay blends
+video images into a VGA signal or graphics into a video signal.
+<wordasword>Video Output Overlays</wordasword> are always
+non-destructive.</para>
+
+ <para>To get the current parameters applications call the
+<constant>VIDIOC_G_FBUF</constant> ioctl with a pointer to a
+<structname>v4l2_framebuffer</structname> structure. The driver fills
+all fields of the structure or returns an &EINVAL; when overlays are
+not supported.</para>
+
+ <para>To set the parameters for a <wordasword>Video Output
+Overlay</wordasword>, applications must initialize the
+<structfield>flags</structfield> field of a struct
+<structname>v4l2_framebuffer</structname>. Since the framebuffer is
+implemented on the TV card all other parameters are determined by the
+driver. When an application calls <constant>VIDIOC_S_FBUF</constant>
+with a pointer to this structure, the driver prepares for the overlay
+and returns the framebuffer parameters as
+<constant>VIDIOC_G_FBUF</constant> does, or it returns an error
+code.</para>
+
+ <para>To set the parameters for a <wordasword>non-destructive
+Video Overlay</wordasword>, applications must initialize the
+<structfield>flags</structfield> field, the
+<structfield>fmt</structfield> substructure, and call
+<constant>VIDIOC_S_FBUF</constant>. Again the driver prepares for the
+overlay and returns the framebuffer parameters as
+<constant>VIDIOC_G_FBUF</constant> does, or it returns an error
+code.</para>
+
+ <para>For a <wordasword>destructive Video Overlay</wordasword>
+applications must additionally provide a
+<structfield>base</structfield> address. Setting up a DMA to a
+random memory location can jeopardize the system security, its
+stability or even damage the hardware, therefore only the superuser
+can set the parameters for a destructive video overlay.</para>
+
+ <!-- NB v4l2_pix_format is also specified in pixfmt.sgml.-->
+
+ <table pgwide="1" frame="none" id="v4l2-framebuffer">
+ <title>struct <structname>v4l2_framebuffer</structname></title>
+ <tgroup cols="4">
+ &cs-ustr;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>capability</structfield></entry>
+ <entry></entry>
+ <entry>Overlay capability flags set by the driver, see
+<xref linkend="framebuffer-cap" />.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>flags</structfield></entry>
+ <entry></entry>
+ <entry>Overlay control flags set by application and
+driver, see <xref linkend="framebuffer-flags" /></entry>
+ </row>
+ <row>
+ <entry>void *</entry>
+ <entry><structfield>base</structfield></entry>
+ <entry></entry>
+ <entry>Physical base address of the framebuffer,
+that is the address of the pixel in the top left corner of the
+framebuffer.<footnote><para>A physical base address may not suit all
+platforms. GK notes in theory we should pass something like PCI device
++ memory region + offset instead. If you encounter problems please
+discuss on the linux-media mailing list: &v4l-ml;.</para></footnote></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ <entry>This field is irrelevant to
+<wordasword>non-destructive Video Overlays</wordasword>. For
+<wordasword>destructive Video Overlays</wordasword> applications must
+provide a base address. The driver may accept only base addresses
+which are a multiple of two, four or eight bytes. For
+<wordasword>Video Output Overlays</wordasword> the driver must return
+a valid base address, so applications can find the corresponding Linux
+framebuffer device (see <xref linkend="osd" />).</entry>
+ </row>
+ <row>
+ <entry>struct</entry>
+ <entry><structfield>fmt</structfield></entry>
+ <entry></entry>
+ <entry>Layout of the frame buffer.</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>__u32</entry>
+ <entry><structfield>width</structfield></entry>
+ <entry>Width of the frame buffer in pixels.</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>__u32</entry>
+ <entry><structfield>height</structfield></entry>
+ <entry>Height of the frame buffer in pixels.</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>__u32</entry>
+ <entry><structfield>pixelformat</structfield></entry>
+ <entry>The pixel format of the
+framebuffer.</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ <entry>For <wordasword>non-destructive Video
+Overlays</wordasword> this field only defines a format for the
+&v4l2-window; <structfield>chromakey</structfield> field.</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ <entry>For <wordasword>destructive Video
+Overlays</wordasword> applications must initialize this field. For
+<wordasword>Video Output Overlays</wordasword> the driver must return
+a valid format.</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ <entry>Usually this is an RGB format (for example
+<link linkend="V4L2-PIX-FMT-RGB565"><constant>V4L2_PIX_FMT_RGB565</constant></link>)
+but YUV formats (only packed YUV formats when chroma keying is used,
+not including <constant>V4L2_PIX_FMT_YUYV</constant> and
+<constant>V4L2_PIX_FMT_UYVY</constant>) and the
+<constant>V4L2_PIX_FMT_PAL8</constant> format are also permitted. The
+behavior of the driver when an application requests a compressed
+format is undefined. See <xref linkend="pixfmt" /> for information on
+pixel formats.</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>&v4l2-field;</entry>
+ <entry><structfield>field</structfield></entry>
+ <entry>Drivers and applications shall ignore this field.
+If applicable, the field order is selected with the &VIDIOC-S-FMT;
+ioctl, using the <structfield>field</structfield> field of
+&v4l2-window;.</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>__u32</entry>
+ <entry><structfield>bytesperline</structfield></entry>
+ <entry>Distance in bytes between the leftmost pixels in
+two adjacent lines.</entry>
+ </row>
+ <row>
+ <entry spanname="hspan"><para>This field is irrelevant to
+<wordasword>non-destructive Video
+Overlays</wordasword>.</para><para>For <wordasword>destructive Video
+Overlays</wordasword> both applications and drivers can set this field
+to request padding bytes at the end of each line. Drivers however may
+ignore the requested value, returning <structfield>width</structfield>
+times bytes-per-pixel or a larger value required by the hardware. That
+implies applications can just set this field to zero to get a
+reasonable default.</para><para>For <wordasword>Video Output
+Overlays</wordasword> the driver must return a valid
+value.</para><para>Video hardware may access padding bytes, therefore
+they must reside in accessible memory. Consider for example the case
+where padding bytes after the last line of an image cross a system
+page boundary. Capture devices may write padding bytes, the value is
+undefined. Output devices ignore the contents of padding
+bytes.</para><para>When the image format is planar the
+<structfield>bytesperline</structfield> value applies to the first
+plane and is divided by the same factor as the
+<structfield>width</structfield> field for the other planes. For
+example the Cb and Cr planes of a YUV 4:2:0 image have half as many
+padding bytes following each line as the Y plane. To avoid ambiguities
+drivers must return a <structfield>bytesperline</structfield> value
+rounded up to a multiple of the scale factor.</para></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>__u32</entry>
+ <entry><structfield>sizeimage</structfield></entry>
+ <entry><para>This field is irrelevant to
+<wordasword>non-destructive Video Overlays</wordasword>. For
+<wordasword>destructive Video Overlays</wordasword> applications must
+initialize this field. For <wordasword>Video Output
+Overlays</wordasword> the driver must return a valid
+format.</para><para>Together with <structfield>base</structfield> it
+defines the framebuffer memory accessible by the
+driver.</para></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>&v4l2-colorspace;</entry>
+ <entry><structfield>colorspace</structfield></entry>
+ <entry>This information supplements the
+<structfield>pixelformat</structfield> and must be set by the driver,
+see <xref linkend="colorspaces" />.</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>__u32</entry>
+ <entry><structfield>priv</structfield></entry>
+ <entry>Reserved. Drivers and applications must set this field to
+zero.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="framebuffer-cap">
+ <title>Frame Buffer Capability Flags</title>
+ <tgroup cols="3">
+ &cs-def;
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_FBUF_CAP_EXTERNOVERLAY</constant></entry>
+ <entry>0x0001</entry>
+ <entry>The device is capable of non-destructive overlays.
+When the driver clears this flag, only destructive overlays are
+supported. There are no drivers yet which support both destructive and
+non-destructive overlays. Video Output Overlays are in practice always
+non-destructive.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_FBUF_CAP_CHROMAKEY</constant></entry>
+ <entry>0x0002</entry>
+ <entry>The device supports clipping by chroma-keying the
+images. That is, image pixels replace pixels in the VGA or video
+signal only where the latter assume a certain color. Chroma-keying
+makes no sense for destructive overlays.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_FBUF_CAP_LIST_CLIPPING</constant></entry>
+ <entry>0x0004</entry>
+ <entry>The device supports clipping using a list of clip
+rectangles.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_FBUF_CAP_BITMAP_CLIPPING</constant></entry>
+ <entry>0x0008</entry>
+ <entry>The device supports clipping using a bit mask.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_FBUF_CAP_LOCAL_ALPHA</constant></entry>
+ <entry>0x0010</entry>
+ <entry>The device supports clipping/blending using the
+alpha channel of the framebuffer or VGA signal. Alpha blending makes
+no sense for destructive overlays.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_FBUF_CAP_GLOBAL_ALPHA</constant></entry>
+ <entry>0x0020</entry>
+ <entry>The device supports alpha blending using a global
+alpha value. Alpha blending makes no sense for destructive overlays.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_FBUF_CAP_LOCAL_INV_ALPHA</constant></entry>
+ <entry>0x0040</entry>
+ <entry>The device supports clipping/blending using the
+inverted alpha channel of the framebuffer or VGA signal. Alpha
+blending makes no sense for destructive overlays.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_FBUF_CAP_SRC_CHROMAKEY</constant></entry>
+ <entry>0x0080</entry>
+ <entry>The device supports Source Chroma-keying. Video pixels
+with the chroma-key colors are replaced by framebuffer pixels, which is exactly opposite of
+<constant>V4L2_FBUF_CAP_CHROMAKEY</constant></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="framebuffer-flags">
+ <title>Frame Buffer Flags</title>
+ <tgroup cols="3">
+ &cs-def;
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_FBUF_FLAG_PRIMARY</constant></entry>
+ <entry>0x0001</entry>
+ <entry>The framebuffer is the primary graphics surface.
+In other words, the overlay is destructive. This flag is typically set by any
+driver that doesn't have the <constant>V4L2_FBUF_CAP_EXTERNOVERLAY</constant>
+capability and it is cleared otherwise.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_FBUF_FLAG_OVERLAY</constant></entry>
+ <entry>0x0002</entry>
+ <entry>If this flag is set for a video capture device, then the
+driver will set the initial overlay size to cover the full framebuffer size,
+otherwise the existing overlay size (as set by &VIDIOC-S-FMT;) will be used.
+
+Only one video capture driver (bttv) supports this flag. The use of this flag
+for capture devices is deprecated. There is no way to detect which drivers
+support this flag, so the only reliable method of setting the overlay size is
+through &VIDIOC-S-FMT;.
+
+If this flag is set for a video output device, then the video output overlay
+window is relative to the top-left corner of the framebuffer and restricted
+to the size of the framebuffer. If it is cleared, then the video output
+overlay window is relative to the video output display.
+ </entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_FBUF_FLAG_CHROMAKEY</constant></entry>
+ <entry>0x0004</entry>
+ <entry>Use chroma-keying. The chroma-key color is
+determined by the <structfield>chromakey</structfield> field of
+&v4l2-window; and negotiated with the &VIDIOC-S-FMT; ioctl, see <xref
+ linkend="overlay" />
+and
+ <xref linkend="osd" />.</entry>
+ </row>
+ <row>
+ <entry spanname="hspan">There are no flags to enable
+clipping using a list of clip rectangles or a bitmap. These methods
+are negotiated with the &VIDIOC-S-FMT; ioctl, see <xref
+ linkend="overlay" /> and <xref linkend="osd" />.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_FBUF_FLAG_LOCAL_ALPHA</constant></entry>
+ <entry>0x0008</entry>
+ <entry>Use the alpha channel of the framebuffer to clip or
+blend framebuffer pixels with video images. The blend
+function is: output = framebuffer pixel * alpha + video pixel * (1 -
+alpha). The actual alpha depth depends on the framebuffer pixel
+format.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_FBUF_FLAG_GLOBAL_ALPHA</constant></entry>
+ <entry>0x0010</entry>
+ <entry>Use a global alpha value to blend the framebuffer
+with video images. The blend function is: output = (framebuffer pixel
+* alpha + video pixel * (255 - alpha)) / 255. The alpha value is
+determined by the <structfield>global_alpha</structfield> field of
+&v4l2-window; and negotiated with the &VIDIOC-S-FMT; ioctl, see <xref
+ linkend="overlay" />
+and <xref linkend="osd" />.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_FBUF_FLAG_LOCAL_INV_ALPHA</constant></entry>
+ <entry>0x0020</entry>
+ <entry>Like
+<constant>V4L2_FBUF_FLAG_LOCAL_ALPHA</constant>, use the alpha channel
+of the framebuffer to clip or blend framebuffer pixels with video
+images, but with an inverted alpha value. The blend function is:
+output = framebuffer pixel * (1 - alpha) + video pixel * alpha. The
+actual alpha depth depends on the framebuffer pixel format.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_FBUF_FLAG_SRC_CHROMAKEY</constant></entry>
+ <entry>0x0040</entry>
+ <entry>Use source chroma-keying. The source chroma-key color is
+determined by the <structfield>chromakey</structfield> field of
+&v4l2-window; and negotiated with the &VIDIOC-S-FMT; ioctl, see <xref
+linkend="overlay" /> and <xref linkend="osd" />.
+Both chroma-keying are mutual exclusive to each other, so same
+<structfield>chromakey</structfield> field of &v4l2-window; is being used.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EPERM</errorcode></term>
+ <listitem>
+ <para><constant>VIDIOC_S_FBUF</constant> can only be called
+by a privileged user to negotiate the parameters for a destructive
+overlay.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The <constant>VIDIOC_S_FBUF</constant> parameters are unsuitable.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-g-fmt.xml b/Documentation/DocBook/media/v4l/vidioc-g-fmt.xml
new file mode 100644
index 000000000..4fe19a7a9
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-g-fmt.xml
@@ -0,0 +1,204 @@
+<refentry id="vidioc-g-fmt">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_G_FMT, VIDIOC_S_FMT,
+VIDIOC_TRY_FMT</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_G_FMT</refname>
+ <refname>VIDIOC_S_FMT</refname>
+ <refname>VIDIOC_TRY_FMT</refname>
+ <refpurpose>Get or set the data format, try a format</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_format
+*<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_G_FMT, VIDIOC_S_FMT, VIDIOC_TRY_FMT</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>These ioctls are used to negotiate the format of data
+(typically image format) exchanged between driver and
+application.</para>
+
+ <para>To query the current parameters applications set the
+<structfield>type</structfield> field of a struct
+<structname>v4l2_format</structname> to the respective buffer (stream)
+type. For example video capture devices use
+<constant>V4L2_BUF_TYPE_VIDEO_CAPTURE</constant> or
+<constant>V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE</constant>. When the application
+calls the <constant>VIDIOC_G_FMT</constant> ioctl with a pointer to
+this structure the driver fills the respective member of the
+<structfield>fmt</structfield> union. In case of video capture devices
+that is either the &v4l2-pix-format; <structfield>pix</structfield> or
+the &v4l2-pix-format-mplane; <structfield>pix_mp</structfield> member.
+When the requested buffer type is not supported drivers return an
+&EINVAL;.</para>
+
+ <para>To change the current format parameters applications
+initialize the <structfield>type</structfield> field and all
+fields of the respective <structfield>fmt</structfield>
+union member. For details see the documentation of the various devices
+types in <xref linkend="devices" />. Good practice is to query the
+current parameters first, and to
+modify only those parameters not suitable for the application. When
+the application calls the <constant>VIDIOC_S_FMT</constant> ioctl
+with a pointer to a <structname>v4l2_format</structname> structure
+the driver checks
+and adjusts the parameters against hardware abilities. Drivers
+should not return an error code unless the <structfield>type</structfield> field is invalid, this is
+a mechanism to fathom device capabilities and to approach parameters
+acceptable for both the application and driver. On success the driver
+may program the hardware, allocate resources and generally prepare for
+data exchange.
+Finally the <constant>VIDIOC_S_FMT</constant> ioctl returns the
+current format parameters as <constant>VIDIOC_G_FMT</constant> does.
+Very simple, inflexible devices may even ignore all input and always
+return the default parameters. However all V4L2 devices exchanging
+data with the application must implement the
+<constant>VIDIOC_G_FMT</constant> and
+<constant>VIDIOC_S_FMT</constant> ioctl. When the requested buffer
+type is not supported drivers return an &EINVAL; on a
+<constant>VIDIOC_S_FMT</constant> attempt. When I/O is already in
+progress or the resource is not available for other reasons drivers
+return the &EBUSY;.</para>
+
+ <para>The <constant>VIDIOC_TRY_FMT</constant> ioctl is equivalent
+to <constant>VIDIOC_S_FMT</constant> with one exception: it does not
+change driver state. It can also be called at any time, never
+returning <errorcode>EBUSY</errorcode>. This function is provided to
+negotiate parameters, to learn about hardware limitations, without
+disabling I/O or possibly time consuming hardware preparations.
+Although strongly recommended drivers are not required to implement
+this ioctl.</para>
+
+ <para>The format as returned by <constant>VIDIOC_TRY_FMT</constant>
+must be identical to what <constant>VIDIOC_S_FMT</constant> returns for
+the same input or output.</para>
+
+ <table pgwide="1" frame="none" id="v4l2-format">
+ <title>struct <structname>v4l2_format</structname></title>
+ <tgroup cols="4">
+ <colspec colname="c1" />
+ <colspec colname="c2" />
+ <colspec colname="c3" />
+ <colspec colname="c4" />
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>type</structfield></entry>
+ <entry></entry>
+ <entry>Type of the data stream, see <xref
+ linkend="v4l2-buf-type" />.</entry>
+ </row>
+ <row>
+ <entry>union</entry>
+ <entry><structfield>fmt</structfield></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>&v4l2-pix-format;</entry>
+ <entry><structfield>pix</structfield></entry>
+ <entry>Definition of an image format, see <xref
+ linkend="pixfmt" />, used by video capture and output
+devices.</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>&v4l2-pix-format-mplane;</entry>
+ <entry><structfield>pix_mp</structfield></entry>
+ <entry>Definition of an image format, see <xref
+ linkend="pixfmt" />, used by video capture and output
+devices that support the <link linkend="planar-apis">multi-planar
+version of the API</link>.</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>&v4l2-window;</entry>
+ <entry><structfield>win</structfield></entry>
+ <entry>Definition of an overlaid image, see <xref
+ linkend="overlay" />, used by video overlay devices.</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>&v4l2-vbi-format;</entry>
+ <entry><structfield>vbi</structfield></entry>
+ <entry>Raw VBI capture or output parameters. This is
+discussed in more detail in <xref linkend="raw-vbi" />. Used by raw VBI
+capture and output devices.</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>&v4l2-sliced-vbi-format;</entry>
+ <entry><structfield>sliced</structfield></entry>
+ <entry>Sliced VBI capture or output parameters. See
+<xref linkend="sliced" /> for details. Used by sliced VBI
+capture and output devices.</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>&v4l2-sdr-format;</entry>
+ <entry><structfield>sdr</structfield></entry>
+ <entry>Definition of a data format, see
+<xref linkend="pixfmt" />, used by SDR capture devices.</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>__u8</entry>
+ <entry><structfield>raw_data</structfield>[200]</entry>
+ <entry>Place holder for future extensions.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The &v4l2-format; <structfield>type</structfield>
+field is invalid or the requested buffer type not supported.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-g-frequency.xml b/Documentation/DocBook/media/v4l/vidioc-g-frequency.xml
new file mode 100644
index 000000000..d1034fb61
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-g-frequency.xml
@@ -0,0 +1,148 @@
+<refentry id="vidioc-g-frequency">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_G_FREQUENCY, VIDIOC_S_FREQUENCY</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_G_FREQUENCY</refname>
+ <refname>VIDIOC_S_FREQUENCY</refname>
+ <refpurpose>Get or set tuner or modulator radio
+frequency</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_frequency
+*<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>const struct v4l2_frequency
+*<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_G_FREQUENCY, VIDIOC_S_FREQUENCY</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>To get the current tuner or modulator radio frequency
+applications set the <structfield>tuner</structfield> field of a
+&v4l2-frequency; to the respective tuner or modulator number (only
+input devices have tuners, only output devices have modulators), zero
+out the <structfield>reserved</structfield> array and
+call the <constant>VIDIOC_G_FREQUENCY</constant> ioctl with a pointer
+to this structure. The driver stores the current frequency in the
+<structfield>frequency</structfield> field.</para>
+
+ <para>To change the current tuner or modulator radio frequency
+applications initialize the <structfield>tuner</structfield>,
+<structfield>type</structfield> and
+<structfield>frequency</structfield> fields, and the
+<structfield>reserved</structfield> array of a &v4l2-frequency; and
+call the <constant>VIDIOC_S_FREQUENCY</constant> ioctl with a pointer
+to this structure. When the requested frequency is not possible the
+driver assumes the closest possible value. However
+<constant>VIDIOC_S_FREQUENCY</constant> is a write-only ioctl, it does
+not return the actual new frequency.</para>
+
+ <table pgwide="1" frame="none" id="v4l2-frequency">
+ <title>struct <structname>v4l2_frequency</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>tuner</structfield></entry>
+ <entry>The tuner or modulator index number. This is the
+same value as in the &v4l2-input; <structfield>tuner</structfield>
+field and the &v4l2-tuner; <structfield>index</structfield> field, or
+the &v4l2-output; <structfield>modulator</structfield> field and the
+&v4l2-modulator; <structfield>index</structfield> field.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>type</structfield></entry>
+ <entry>The tuner type. This is the same value as in the
+&v4l2-tuner; <structfield>type</structfield> field. The type must be set
+to <constant>V4L2_TUNER_RADIO</constant> for <filename>/dev/radioX</filename>
+device nodes, and to <constant>V4L2_TUNER_ANALOG_TV</constant>
+for all others. Set this field to <constant>V4L2_TUNER_RADIO</constant> for
+modulators (currently only radio modulators are supported).
+See <xref linkend="v4l2-tuner-type" /></entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>frequency</structfield></entry>
+ <entry>Tuning frequency in units of 62.5 kHz, or if the
+&v4l2-tuner; or &v4l2-modulator; <structfield>capability</structfield> flag
+<constant>V4L2_TUNER_CAP_LOW</constant> is set, in units of 62.5
+Hz. A 1 Hz unit is used when the <structfield>capability</structfield> flag
+<constant>V4L2_TUNER_CAP_1HZ</constant> is set.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved</structfield>[8]</entry>
+ <entry>Reserved for future extensions. Drivers and
+ applications must set the array to zero.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The <structfield>tuner</structfield> index is out of
+bounds or the value in the <structfield>type</structfield> field is
+wrong.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EBUSY</errorcode></term>
+ <listitem>
+ <para>A hardware seek is in progress.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-g-input.xml b/Documentation/DocBook/media/v4l/vidioc-g-input.xml
new file mode 100644
index 000000000..1d4306509
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-g-input.xml
@@ -0,0 +1,83 @@
+<refentry id="vidioc-g-input">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_G_INPUT, VIDIOC_S_INPUT</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_G_INPUT</refname>
+ <refname>VIDIOC_S_INPUT</refname>
+ <refpurpose>Query or select the current video input</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>int *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_G_INPUT, VIDIOC_S_INPUT</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>To query the current video input applications call the
+<constant>VIDIOC_G_INPUT</constant> ioctl with a pointer to an integer
+where the driver stores the number of the input, as in the
+&v4l2-input; <structfield>index</structfield> field. This ioctl will
+fail only when there are no video inputs, returning
+<errorcode>EINVAL</errorcode>.</para>
+
+ <para>To select a video input applications store the number of the
+desired input in an integer and call the
+<constant>VIDIOC_S_INPUT</constant> ioctl with a pointer to this
+integer. Side effects are possible. For example inputs may support
+different video standards, so the driver may implicitly switch the
+current standard. Because of these possible side effects applications
+must select an input before querying or negotiating any other parameters.</para>
+
+ <para>Information about video inputs is available using the
+&VIDIOC-ENUMINPUT; ioctl.</para>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The number of the video input is out of bounds.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-g-jpegcomp.xml b/Documentation/DocBook/media/v4l/vidioc-g-jpegcomp.xml
new file mode 100644
index 000000000..098ff4838
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-g-jpegcomp.xml
@@ -0,0 +1,175 @@
+<refentry id="vidioc-g-jpegcomp">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_G_JPEGCOMP, VIDIOC_S_JPEGCOMP</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_G_JPEGCOMP</refname>
+ <refname>VIDIOC_S_JPEGCOMP</refname>
+ <refpurpose></refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>v4l2_jpegcompression *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>const v4l2_jpegcompression *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_G_JPEGCOMP, VIDIOC_S_JPEGCOMP</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>These ioctls are <emphasis role="bold">deprecated</emphasis>.
+ New drivers and applications should use <link linkend="jpeg-controls">
+ JPEG class controls</link> for image quality and JPEG markers control.
+ </para>
+
+ <para>[to do]</para>
+
+ <para>Ronald Bultje elaborates:</para>
+
+ <!-- See video4linux-list@redhat.com on 16 Oct 2002, subject
+"Re: [V4L] Re: v4l2 api / Zoran v4l2_jpegcompression" -->
+
+ <para>APP is some application-specific information. The
+application can set it itself, and it'll be stored in the JPEG-encoded
+fields (eg; interlacing information for in an AVI or so). COM is the
+same, but it's comments, like 'encoded by me' or so.</para>
+
+ <para>jpeg_markers describes whether the huffman tables,
+quantization tables and the restart interval information (all
+JPEG-specific stuff) should be stored in the JPEG-encoded fields.
+These define how the JPEG field is encoded. If you omit them,
+applications assume you've used standard encoding. You usually do want
+to add them.</para>
+
+ <!-- NB VIDIOC_S_JPEGCOMP is w/o. -->
+
+ <table pgwide="1" frame="none" id="v4l2-jpegcompression">
+ <title>struct <structname>v4l2_jpegcompression</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>int</entry>
+ <entry><structfield>quality</structfield></entry>
+ <entry>Deprecated. If <link linkend="jpeg-quality-control"><constant>
+ V4L2_CID_JPEG_COMPRESSION_QUALITY</constant></link> control is exposed
+ by a driver applications should use it instead and ignore this field.
+ </entry>
+ </row>
+ <row>
+ <entry>int</entry>
+ <entry><structfield>APPn</structfield></entry>
+ <entry></entry>
+ </row>
+ <row>
+ <entry>int</entry>
+ <entry><structfield>APP_len</structfield></entry>
+ <entry></entry>
+ </row>
+ <row>
+ <entry>char</entry>
+ <entry><structfield>APP_data</structfield>[60]</entry>
+ <entry></entry>
+ </row>
+ <row>
+ <entry>int</entry>
+ <entry><structfield>COM_len</structfield></entry>
+ <entry></entry>
+ </row>
+ <row>
+ <entry>char</entry>
+ <entry><structfield>COM_data</structfield>[60]</entry>
+ <entry></entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>jpeg_markers</structfield></entry>
+ <entry>See <xref linkend="jpeg-markers"/>. Deprecated.
+ If <link linkend="jpeg-active-marker-control"><constant>
+ V4L2_CID_JPEG_ACTIVE_MARKER</constant></link> control
+ is exposed by a driver applications should use it instead
+ and ignore this field.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="jpeg-markers">
+ <title>JPEG Markers Flags</title>
+ <tgroup cols="3">
+ &cs-def;
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_JPEG_MARKER_DHT</constant></entry>
+ <entry>(1&lt;&lt;3)</entry>
+ <entry>Define Huffman Tables</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_JPEG_MARKER_DQT</constant></entry>
+ <entry>(1&lt;&lt;4)</entry>
+ <entry>Define Quantization Tables</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_JPEG_MARKER_DRI</constant></entry>
+ <entry>(1&lt;&lt;5)</entry>
+ <entry>Define Restart Interval</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_JPEG_MARKER_COM</constant></entry>
+ <entry>(1&lt;&lt;6)</entry>
+ <entry>Comment segment</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_JPEG_MARKER_APP</constant></entry>
+ <entry>(1&lt;&lt;7)</entry>
+ <entry>App segment, driver will always use APP0</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-g-modulator.xml b/Documentation/DocBook/media/v4l/vidioc-g-modulator.xml
new file mode 100644
index 000000000..7068b599a
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-g-modulator.xml
@@ -0,0 +1,240 @@
+<refentry id="vidioc-g-modulator">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_G_MODULATOR, VIDIOC_S_MODULATOR</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_G_MODULATOR</refname>
+ <refname>VIDIOC_S_MODULATOR</refname>
+ <refpurpose>Get or set modulator attributes</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_modulator
+*<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>const struct v4l2_modulator
+*<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_G_MODULATOR, VIDIOC_S_MODULATOR</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>To query the attributes of a modulator applications initialize
+the <structfield>index</structfield> field and zero out the
+<structfield>reserved</structfield> array of a &v4l2-modulator; and
+call the <constant>VIDIOC_G_MODULATOR</constant> ioctl with a pointer
+to this structure. Drivers fill the rest of the structure or return an
+&EINVAL; when the index is out of bounds. To enumerate all modulators
+applications shall begin at index zero, incrementing by one until the
+driver returns <errorcode>EINVAL</errorcode>.</para>
+
+ <para>Modulators have two writable properties, an audio
+modulation set and the radio frequency. To change the modulated audio
+subprograms, applications initialize the <structfield>index
+</structfield> and <structfield>txsubchans</structfield> fields and the
+<structfield>reserved</structfield> array and call the
+<constant>VIDIOC_S_MODULATOR</constant> ioctl. Drivers may choose a
+different audio modulation if the request cannot be satisfied. However
+this is a write-only ioctl, it does not return the actual audio
+modulation selected.</para>
+
+ <para>To change the radio frequency the &VIDIOC-S-FREQUENCY; ioctl
+is available.</para>
+
+ <table pgwide="1" frame="none" id="v4l2-modulator">
+ <title>struct <structname>v4l2_modulator</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>index</structfield></entry>
+ <entry>Identifies the modulator, set by the
+application.</entry>
+ </row>
+ <row>
+ <entry>__u8</entry>
+ <entry><structfield>name</structfield>[32]</entry>
+ <entry>Name of the modulator, a NUL-terminated ASCII
+string. This information is intended for the user.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>capability</structfield></entry>
+ <entry>Modulator capability flags. No flags are defined
+for this field, the tuner flags in &v4l2-tuner;
+are used accordingly. The audio flags indicate the ability
+to encode audio subprograms. They will <emphasis>not</emphasis>
+change for example with the current video standard.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>rangelow</structfield></entry>
+ <entry>The lowest tunable frequency in units of 62.5
+KHz, or if the <structfield>capability</structfield> flag
+<constant>V4L2_TUNER_CAP_LOW</constant> is set, in units of 62.5
+Hz, or if the <structfield>capability</structfield> flag
+<constant>V4L2_TUNER_CAP_1HZ</constant> is set, in units of 1 Hz.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>rangehigh</structfield></entry>
+ <entry>The highest tunable frequency in units of 62.5
+KHz, or if the <structfield>capability</structfield> flag
+<constant>V4L2_TUNER_CAP_LOW</constant> is set, in units of 62.5
+Hz, or if the <structfield>capability</structfield> flag
+<constant>V4L2_TUNER_CAP_1HZ</constant> is set, in units of 1 Hz.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>txsubchans</structfield></entry>
+ <entry>With this field applications can determine how
+audio sub-carriers shall be modulated. It contains a set of flags as
+defined in <xref linkend="modulator-txsubchans" />. Note the tuner
+<structfield>rxsubchans</structfield> flags are reused, but the
+semantics are different. Video output devices are assumed to have an
+analog or PCM audio input with 1-3 channels. The
+<structfield>txsubchans</structfield> flags select one or more
+channels for modulation, together with some audio subprogram
+indicator, for example a stereo pilot tone.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved</structfield>[4]</entry>
+ <entry>Reserved for future extensions. Drivers and
+applications must set the array to zero.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="modulator-txsubchans">
+ <title>Modulator Audio Transmission Flags</title>
+ <tgroup cols="3">
+ &cs-def;
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_TUNER_SUB_MONO</constant></entry>
+ <entry>0x0001</entry>
+ <entry>Modulate channel 1 as mono audio, when the input
+has more channels, a down-mix of channel 1 and 2. This flag does not
+combine with <constant>V4L2_TUNER_SUB_STEREO</constant> or
+<constant>V4L2_TUNER_SUB_LANG1</constant>.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_TUNER_SUB_STEREO</constant></entry>
+ <entry>0x0002</entry>
+ <entry>Modulate channel 1 and 2 as left and right
+channel of a stereo audio signal. When the input has only one channel
+or two channels and <constant>V4L2_TUNER_SUB_SAP</constant> is also
+set, channel 1 is encoded as left and right channel. This flag does
+not combine with <constant>V4L2_TUNER_SUB_MONO</constant> or
+<constant>V4L2_TUNER_SUB_LANG1</constant>. When the driver does not
+support stereo audio it shall fall back to mono.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_TUNER_SUB_LANG1</constant></entry>
+ <entry>0x0008</entry>
+ <entry>Modulate channel 1 and 2 as primary and secondary
+language of a bilingual audio signal. When the input has only one
+channel it is used for both languages. It is not possible to encode
+the primary or secondary language only. This flag does not combine
+with <constant>V4L2_TUNER_SUB_MONO</constant>,
+<constant>V4L2_TUNER_SUB_STEREO</constant> or
+<constant>V4L2_TUNER_SUB_SAP</constant>. If the hardware does not
+support the respective audio matrix, or the current video standard
+does not permit bilingual audio the
+<constant>VIDIOC_S_MODULATOR</constant> ioctl shall return an &EINVAL;
+and the driver shall fall back to mono or stereo mode.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_TUNER_SUB_LANG2</constant></entry>
+ <entry>0x0004</entry>
+ <entry>Same effect as
+<constant>V4L2_TUNER_SUB_SAP</constant>.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_TUNER_SUB_SAP</constant></entry>
+ <entry>0x0004</entry>
+ <entry>When combined with <constant>V4L2_TUNER_SUB_MONO
+</constant> the first channel is encoded as mono audio, the last
+channel as Second Audio Program. When the input has only one channel
+it is used for both audio tracks. When the input has three channels
+the mono track is a down-mix of channel 1 and 2. When combined with
+<constant>V4L2_TUNER_SUB_STEREO</constant> channel 1 and 2 are
+encoded as left and right stereo audio, channel 3 as Second Audio
+Program. When the input has only two channels, the first is encoded as
+left and right channel and the second as SAP. When the input has only
+one channel it is used for all audio tracks. It is not possible to
+encode a Second Audio Program only. This flag must combine with
+<constant>V4L2_TUNER_SUB_MONO</constant> or
+<constant>V4L2_TUNER_SUB_STEREO</constant>. If the hardware does not
+support the respective audio matrix, or the current video standard
+does not permit SAP the <constant>VIDIOC_S_MODULATOR</constant> ioctl
+shall return an &EINVAL; and driver shall fall back to mono or stereo
+mode.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_TUNER_SUB_RDS</constant></entry>
+ <entry>0x0010</entry>
+ <entry>Enable the RDS encoder for a radio FM transmitter.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The &v4l2-modulator;
+<structfield>index</structfield> is out of bounds.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-g-output.xml b/Documentation/DocBook/media/v4l/vidioc-g-output.xml
new file mode 100644
index 000000000..4533068ec
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-g-output.xml
@@ -0,0 +1,85 @@
+<refentry id="vidioc-g-output">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_G_OUTPUT, VIDIOC_S_OUTPUT</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_G_OUTPUT</refname>
+ <refname>VIDIOC_S_OUTPUT</refname>
+ <refpurpose>Query or select the current video output</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>int *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_G_OUTPUT, VIDIOC_S_OUTPUT</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>To query the current video output applications call the
+<constant>VIDIOC_G_OUTPUT</constant> ioctl with a pointer to an integer
+where the driver stores the number of the output, as in the
+&v4l2-output; <structfield>index</structfield> field. This ioctl
+will fail only when there are no video outputs, returning the
+&EINVAL;.</para>
+
+ <para>To select a video output applications store the number of the
+desired output in an integer and call the
+<constant>VIDIOC_S_OUTPUT</constant> ioctl with a pointer to this integer.
+Side effects are possible. For example outputs may support different
+video standards, so the driver may implicitly switch the current
+standard.
+standard. Because of these possible side effects applications
+must select an output before querying or negotiating any other parameters.</para>
+
+ <para>Information about video outputs is available using the
+&VIDIOC-ENUMOUTPUT; ioctl.</para>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The number of the video output is out of bounds, or
+there are no video outputs at all.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-g-parm.xml b/Documentation/DocBook/media/v4l/vidioc-g-parm.xml
new file mode 100644
index 000000000..f4e28e7d4
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-g-parm.xml
@@ -0,0 +1,314 @@
+<refentry id="vidioc-g-parm">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_G_PARM, VIDIOC_S_PARM</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_G_PARM</refname>
+ <refname>VIDIOC_S_PARM</refname>
+ <refpurpose>Get or set streaming parameters</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>v4l2_streamparm *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_G_PARM, VIDIOC_S_PARM</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>The current video standard determines a nominal number of
+frames per second. If less than this number of frames is to be
+captured or output, applications can request frame skipping or
+duplicating on the driver side. This is especially useful when using
+the <function>read()</function> or <function>write()</function>, which
+are not augmented by timestamps or sequence counters, and to avoid
+unnecessary data copying.</para>
+
+ <para>Further these ioctls can be used to determine the number of
+buffers used internally by a driver in read/write mode. For
+implications see the section discussing the &func-read;
+function.</para>
+
+ <para>To get and set the streaming parameters applications call
+the <constant>VIDIOC_G_PARM</constant> and
+<constant>VIDIOC_S_PARM</constant> ioctl, respectively. They take a
+pointer to a struct <structname>v4l2_streamparm</structname> which
+contains a union holding separate parameters for input and output
+devices.</para>
+
+ <table pgwide="1" frame="none" id="v4l2-streamparm">
+ <title>struct <structname>v4l2_streamparm</structname></title>
+ <tgroup cols="4">
+ &cs-ustr;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>type</structfield></entry>
+ <entry></entry>
+ <entry>The buffer (stream) type, same as &v4l2-format;
+<structfield>type</structfield>, set by the application. See <xref
+ linkend="v4l2-buf-type" /></entry>
+ </row>
+ <row>
+ <entry>union</entry>
+ <entry><structfield>parm</structfield></entry>
+ <entry></entry>
+ <entry></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>&v4l2-captureparm;</entry>
+ <entry><structfield>capture</structfield></entry>
+ <entry>Parameters for capture devices, used when
+<structfield>type</structfield> is
+<constant>V4L2_BUF_TYPE_VIDEO_CAPTURE</constant>.</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>&v4l2-outputparm;</entry>
+ <entry><structfield>output</structfield></entry>
+ <entry>Parameters for output devices, used when
+<structfield>type</structfield> is
+<constant>V4L2_BUF_TYPE_VIDEO_OUTPUT</constant>.</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>__u8</entry>
+ <entry><structfield>raw_data</structfield>[200]</entry>
+ <entry>A place holder for future extensions.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="v4l2-captureparm">
+ <title>struct <structname>v4l2_captureparm</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>capability</structfield></entry>
+ <entry>See <xref linkend="parm-caps" />.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>capturemode</structfield></entry>
+ <entry>Set by drivers and applications, see <xref linkend="parm-flags" />.</entry>
+ </row>
+ <row>
+ <entry>&v4l2-fract;</entry>
+ <entry><structfield>timeperframe</structfield></entry>
+ <entry><para>This is the desired period between
+successive frames captured by the driver, in seconds. The
+field is intended to skip frames on the driver side, saving I/O
+bandwidth.</para><para>Applications store here the desired frame
+period, drivers return the actual frame period, which must be greater
+or equal to the nominal frame period determined by the current video
+standard (&v4l2-standard; <structfield>frameperiod</structfield>
+field). Changing the video standard (also implicitly by switching the
+video input) may reset this parameter to the nominal frame period. To
+reset manually applications can just set this field to
+zero.</para><para>Drivers support this function only when they set the
+<constant>V4L2_CAP_TIMEPERFRAME</constant> flag in the
+<structfield>capability</structfield> field.</para></entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>extendedmode</structfield></entry>
+ <entry>Custom (driver specific) streaming parameters. When
+unused, applications and drivers must set this field to zero.
+Applications using this field should check the driver name and
+version, see <xref linkend="querycap" />.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>readbuffers</structfield></entry>
+ <entry>Applications set this field to the desired number
+of buffers used internally by the driver in &func-read; mode. Drivers
+return the actual number of buffers. When an application requests zero
+buffers, drivers should just return the current setting rather than
+the minimum or an error code. For details see <xref
+ linkend="rw" />.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved</structfield>[4]</entry>
+ <entry>Reserved for future extensions. Drivers and
+applications must set the array to zero.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="v4l2-outputparm">
+ <title>struct <structname>v4l2_outputparm</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>capability</structfield></entry>
+ <entry>See <xref linkend="parm-caps" />.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>outputmode</structfield></entry>
+ <entry>Set by drivers and applications, see <xref
+ linkend="parm-flags" />.</entry>
+ </row>
+ <row>
+ <entry>&v4l2-fract;</entry>
+ <entry><structfield>timeperframe</structfield></entry>
+ <entry>This is the desired period between
+successive frames output by the driver, in seconds.</entry>
+ </row>
+ <row>
+ <entry spanname="hspan"><para>The field is intended to
+repeat frames on the driver side in &func-write; mode (in streaming
+mode timestamps can be used to throttle the output), saving I/O
+bandwidth.</para><para>Applications store here the desired frame
+period, drivers return the actual frame period, which must be greater
+or equal to the nominal frame period determined by the current video
+standard (&v4l2-standard; <structfield>frameperiod</structfield>
+field). Changing the video standard (also implicitly by switching the
+video output) may reset this parameter to the nominal frame period. To
+reset manually applications can just set this field to
+zero.</para><para>Drivers support this function only when they set the
+<constant>V4L2_CAP_TIMEPERFRAME</constant> flag in the
+<structfield>capability</structfield> field.</para></entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>extendedmode</structfield></entry>
+ <entry>Custom (driver specific) streaming parameters. When
+unused, applications and drivers must set this field to zero.
+Applications using this field should check the driver name and
+version, see <xref linkend="querycap" />.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>writebuffers</structfield></entry>
+ <entry>Applications set this field to the desired number
+of buffers used internally by the driver in
+<function>write()</function> mode. Drivers return the actual number of
+buffers. When an application requests zero buffers, drivers should
+just return the current setting rather than the minimum or an error
+code. For details see <xref linkend="rw" />.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved</structfield>[4]</entry>
+ <entry>Reserved for future extensions. Drivers and
+applications must set the array to zero.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="parm-caps">
+ <title>Streaming Parameters Capabilites</title>
+ <tgroup cols="3">
+ &cs-def;
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_CAP_TIMEPERFRAME</constant></entry>
+ <entry>0x1000</entry>
+ <entry>The frame skipping/repeating controlled by the
+<structfield>timeperframe</structfield> field is supported.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="parm-flags">
+ <title>Capture Parameters Flags</title>
+ <tgroup cols="3">
+ &cs-def;
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_MODE_HIGHQUALITY</constant></entry>
+ <entry>0x0001</entry>
+ <entry><para>High quality imaging mode. High quality mode
+is intended for still imaging applications. The idea is to get the
+best possible image quality that the hardware can deliver. It is not
+defined how the driver writer may achieve that; it will depend on the
+hardware and the ingenuity of the driver writer. High quality mode is
+a different mode from the the regular motion video capture modes. In
+high quality mode:<itemizedlist>
+ <listitem>
+ <para>The driver may be able to capture higher
+resolutions than for motion capture.</para>
+ </listitem>
+ <listitem>
+ <para>The driver may support fewer pixel formats
+than motion capture (eg; true color).</para>
+ </listitem>
+ <listitem>
+ <para>The driver may capture and arithmetically
+combine multiple successive fields or frames to remove color edge
+artifacts and reduce the noise in the video data.
+</para>
+ </listitem>
+ <listitem>
+ <para>The driver may capture images in slices like
+a scanner in order to handle larger format images than would otherwise
+be possible. </para>
+ </listitem>
+ <listitem>
+ <para>An image capture operation may be
+significantly slower than motion capture. </para>
+ </listitem>
+ <listitem>
+ <para>Moving objects in the image might have
+excessive motion blur. </para>
+ </listitem>
+ <listitem>
+ <para>Capture might only work through the
+<function>read()</function> call.</para>
+ </listitem>
+ </itemizedlist></para></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-g-priority.xml b/Documentation/DocBook/media/v4l/vidioc-g-priority.xml
new file mode 100644
index 000000000..6a81b4fe9
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-g-priority.xml
@@ -0,0 +1,135 @@
+<refentry id="vidioc-g-priority">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_G_PRIORITY, VIDIOC_S_PRIORITY</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_G_PRIORITY</refname>
+ <refname>VIDIOC_S_PRIORITY</refname>
+ <refpurpose>Query or request the access priority associated with a
+file descriptor</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>enum v4l2_priority *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>const enum v4l2_priority *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_G_PRIORITY, VIDIOC_S_PRIORITY</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para>Pointer to an enum v4l2_priority type.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>To query the current access priority
+applications call the <constant>VIDIOC_G_PRIORITY</constant> ioctl
+with a pointer to an enum v4l2_priority variable where the driver stores
+the current priority.</para>
+
+ <para>To request an access priority applications store the
+desired priority in an enum v4l2_priority variable and call
+<constant>VIDIOC_S_PRIORITY</constant> ioctl with a pointer to this
+variable.</para>
+
+ <table frame="none" pgwide="1" id="v4l2-priority">
+ <title>enum v4l2_priority</title>
+ <tgroup cols="3">
+ &cs-def;
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_PRIORITY_UNSET</constant></entry>
+ <entry>0</entry>
+ <entry></entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_PRIORITY_BACKGROUND</constant></entry>
+ <entry>1</entry>
+ <entry>Lowest priority, usually applications running in
+background, for example monitoring VBI transmissions. A proxy
+application running in user space will be necessary if multiple
+applications want to read from a device at this priority.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_PRIORITY_INTERACTIVE</constant></entry>
+ <entry>2</entry>
+ <entry></entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_PRIORITY_DEFAULT</constant></entry>
+ <entry>2</entry>
+ <entry>Medium priority, usually applications started and
+interactively controlled by the user. For example TV viewers, Teletext
+browsers, or just "panel" applications to change the channel or video
+controls. This is the default priority unless an application requests
+another.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_PRIORITY_RECORD</constant></entry>
+ <entry>3</entry>
+ <entry>Highest priority. Only one file descriptor can have
+this priority, it blocks any other fd from changing device properties.
+Usually applications which must not be interrupted, like video
+recording.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The requested priority value is invalid.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EBUSY</errorcode></term>
+ <listitem>
+ <para>Another application already requested higher
+priority.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-g-selection.xml b/Documentation/DocBook/media/v4l/vidioc-g-selection.xml
new file mode 100644
index 000000000..0bb5c060d
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-g-selection.xml
@@ -0,0 +1,239 @@
+<refentry id="vidioc-g-selection">
+
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_G_SELECTION, VIDIOC_S_SELECTION</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_G_SELECTION</refname>
+ <refname>VIDIOC_S_SELECTION</refname>
+ <refpurpose>Get or set one of the selection rectangles</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_selection *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_G_SELECTION, VIDIOC_S_SELECTION</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <note>
+ <title>Experimental</title>
+ <para>This is an <link linkend="experimental"> experimental </link>
+ interface and may change in the future.</para>
+ </note>
+
+ <para>The ioctls are used to query and configure selection rectangles.</para>
+
+<para>To query the cropping (composing) rectangle set &v4l2-selection;
+<structfield> type </structfield> field to the respective buffer type.
+Do not use the multiplanar buffer types. Use <constant>V4L2_BUF_TYPE_VIDEO_CAPTURE</constant>
+instead of <constant>V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE</constant> and use
+<constant>V4L2_BUF_TYPE_VIDEO_OUTPUT</constant> instead of
+<constant>V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE</constant>. The next step is
+setting the value of &v4l2-selection; <structfield>target</structfield> field
+to <constant>V4L2_SEL_TGT_CROP</constant> (<constant>V4L2_SEL_TGT_COMPOSE</constant>).
+Please refer to table <xref linkend="v4l2-selections-common" /> or <xref linkend="selection-api" />
+for additional targets. The <structfield>flags</structfield> and <structfield>reserved
+</structfield> fields of &v4l2-selection; are ignored and they must be filled
+with zeros. The driver fills the rest of the structure or
+returns &EINVAL; if incorrect buffer type or target was used. If cropping
+(composing) is not supported then the active rectangle is not mutable and it is
+always equal to the bounds rectangle. Finally, the &v4l2-rect;
+<structfield>r</structfield> rectangle is filled with the current cropping
+(composing) coordinates. The coordinates are expressed in driver-dependent
+units. The only exception are rectangles for images in raw formats, whose
+coordinates are always expressed in pixels.</para>
+
+<para>To change the cropping (composing) rectangle set the &v4l2-selection;
+<structfield>type</structfield> field to the respective buffer type. Do not
+use multiplanar buffers. Use <constant>V4L2_BUF_TYPE_VIDEO_CAPTURE</constant>
+instead of <constant>V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE</constant>. Use
+<constant>V4L2_BUF_TYPE_VIDEO_OUTPUT</constant> instead of
+<constant>V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE</constant>. The next step is
+setting the value of &v4l2-selection; <structfield>target</structfield> to
+<constant>V4L2_SEL_TGT_CROP</constant> (<constant>V4L2_SEL_TGT_COMPOSE</constant>).
+Please refer to table <xref linkend="v4l2-selections-common" /> or <xref linkend="selection-api" />
+for additional targets. The &v4l2-rect; <structfield>r</structfield> rectangle need to be
+set to the desired active area. Field &v4l2-selection; <structfield> reserved
+</structfield> is ignored and must be filled with zeros. The driver may adjust
+coordinates of the requested rectangle. An application may
+introduce constraints to control rounding behaviour. The &v4l2-selection;
+<structfield>flags</structfield> field must be set to one of the following:
+
+<itemizedlist>
+ <listitem>
+<para><constant>0</constant> - The driver can adjust the rectangle size freely
+and shall choose a crop/compose rectangle as close as possible to the requested
+one.</para>
+ </listitem>
+ <listitem>
+<para><constant>V4L2_SEL_FLAG_GE</constant> - The driver is not allowed to
+shrink the rectangle. The original rectangle must lay inside the adjusted
+one.</para>
+ </listitem>
+ <listitem>
+<para><constant>V4L2_SEL_FLAG_LE</constant> - The driver is not allowed to
+enlarge the rectangle. The adjusted rectangle must lay inside the original
+one.</para>
+ </listitem>
+ <listitem>
+<para><constant>V4L2_SEL_FLAG_GE | V4L2_SEL_FLAG_LE</constant> - The driver
+must choose the size exactly the same as in the requested rectangle.</para>
+ </listitem>
+</itemizedlist>
+
+Please refer to <xref linkend="sel-const-adjust" />.
+
+</para>
+
+<para> The driver may have to adjusts the requested dimensions against hardware
+limits and other parts as the pipeline, i.e. the bounds given by the
+capture/output window or TV display. The closest possible values of horizontal
+and vertical offset and sizes are chosen according to following priority:
+
+<orderedlist>
+ <listitem>
+ <para>Satisfy constraints from &v4l2-selection; <structfield>flags</structfield>.</para>
+ </listitem>
+ <listitem>
+ <para>Adjust width, height, left, and top to hardware limits and alignments.</para>
+ </listitem>
+ <listitem>
+ <para>Keep center of adjusted rectangle as close as possible to the original one.</para>
+ </listitem>
+ <listitem>
+ <para>Keep width and height as close as possible to original ones.</para>
+ </listitem>
+ <listitem>
+ <para>Keep horizontal and vertical offset as close as possible to original ones.</para>
+ </listitem>
+</orderedlist>
+
+On success the &v4l2-rect; <structfield>r</structfield> field contains
+the adjusted rectangle. When the parameters are unsuitable the application may
+modify the cropping (composing) or image parameters and repeat the cycle until
+satisfactory parameters have been negotiated. If constraints flags have to be
+violated at then ERANGE is returned. The error indicates that <emphasis>there
+exist no rectangle</emphasis> that satisfies the constraints.</para>
+
+ <para>Selection targets and flags are documented in <xref
+ linkend="v4l2-selections-common"/>.</para>
+
+ <para>
+ <figure id="sel-const-adjust">
+ <title>Size adjustments with constraint flags.</title>
+ <mediaobject>
+ <imageobject>
+ <imagedata fileref="constraints.png" format="PNG" />
+ </imageobject>
+ <textobject>
+ <phrase>Behaviour of rectangle adjustment for different constraint
+ flags.</phrase>
+ </textobject>
+ </mediaobject>
+ </figure>
+ </para>
+
+ <para>
+ <table pgwide="1" frame="none" id="v4l2-selection">
+ <title>struct <structname>v4l2_selection</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>type</structfield></entry>
+ <entry>Type of the buffer (from &v4l2-buf-type;).</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>target</structfield></entry>
+ <entry>Used to select between <link linkend="v4l2-selections-common"> cropping
+ and composing rectangles</link>.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>flags</structfield></entry>
+ <entry>Flags controlling the selection rectangle adjustments, refer to
+ <link linkend="v4l2-selection-flags">selection flags</link>.</entry>
+ </row>
+ <row>
+ <entry>&v4l2-rect;</entry>
+ <entry><structfield>r</structfield></entry>
+ <entry>The selection rectangle.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved[9]</structfield></entry>
+ <entry>Reserved fields for future use.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </para>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>Given buffer type <structfield>type</structfield> or
+the selection target <structfield>target</structfield> is not supported,
+or the <structfield>flags</structfield> argument is not valid.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>ERANGE</errorcode></term>
+ <listitem>
+ <para>It is not possible to adjust &v4l2-rect; <structfield>
+r</structfield> rectangle to satisfy all contraints given in the
+<structfield>flags</structfield> argument.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EBUSY</errorcode></term>
+ <listitem>
+ <para>It is not possible to apply change of the selection rectangle
+at the moment. Usually because streaming is in progress.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-g-sliced-vbi-cap.xml b/Documentation/DocBook/media/v4l/vidioc-g-sliced-vbi-cap.xml
new file mode 100644
index 000000000..d05623c55
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-g-sliced-vbi-cap.xml
@@ -0,0 +1,255 @@
+<refentry id="vidioc-g-sliced-vbi-cap">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_G_SLICED_VBI_CAP</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_G_SLICED_VBI_CAP</refname>
+ <refpurpose>Query sliced VBI capabilities</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_sliced_vbi_cap *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_G_SLICED_VBI_CAP</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>To find out which data services are supported by a sliced
+VBI capture or output device, applications initialize the
+<structfield>type</structfield> field of a &v4l2-sliced-vbi-cap;,
+clear the <structfield>reserved</structfield> array and
+call the <constant>VIDIOC_G_SLICED_VBI_CAP</constant> ioctl. The
+driver fills in the remaining fields or returns an &EINVAL; if the
+sliced VBI API is unsupported or <structfield>type</structfield>
+is invalid.</para>
+
+ <para>Note the <structfield>type</structfield> field was added,
+and the ioctl changed from read-only to write-read, in Linux 2.6.19.</para>
+
+ <table pgwide="1" frame="none" id="v4l2-sliced-vbi-cap">
+ <title>struct <structname>v4l2_sliced_vbi_cap</structname></title>
+ <tgroup cols="5">
+ <colspec colname="c1" colwidth="3*" />
+ <colspec colname="c2" colwidth="3*" />
+ <colspec colname="c3" colwidth="2*" />
+ <colspec colname="c4" colwidth="2*" />
+ <colspec colname="c5" colwidth="2*" />
+ <spanspec spanname="hspan" namest="c3" nameend="c5" />
+ <tbody valign="top">
+ <row>
+ <entry>__u16</entry>
+ <entry><structfield>service_set</structfield></entry>
+ <entry spanname="hspan">A set of all data services
+supported by the driver. Equal to the union of all elements of the
+<structfield>service_lines </structfield> array.</entry>
+ </row>
+ <row>
+ <entry>__u16</entry>
+ <entry><structfield>service_lines</structfield>[2][24]</entry>
+ <entry spanname="hspan">Each element of this array
+contains a set of data services the hardware can look for or insert
+into a particular scan line. Data services are defined in <xref
+ linkend="vbi-services" />. Array indices map to ITU-R
+line numbers (see also <xref
+ linkend="vbi-525" /> and <xref
+linkend="vbi-625" />) as follows:</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry>Element</entry>
+ <entry>525 line systems</entry>
+ <entry>625 line systems</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry><structfield>service_lines</structfield>[0][1]</entry>
+ <entry align="center">1</entry>
+ <entry align="center">1</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry><structfield>service_lines</structfield>[0][23]</entry>
+ <entry align="center">23</entry>
+ <entry align="center">23</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry><structfield>service_lines</structfield>[1][1]</entry>
+ <entry align="center">264</entry>
+ <entry align="center">314</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry><structfield>service_lines</structfield>[1][23]</entry>
+ <entry align="center">286</entry>
+ <entry align="center">336</entry>
+ </row>
+ <row>
+ <entry></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry spanname="hspan">The number of VBI lines the
+hardware can capture or output per frame, or the number of services it
+can identify on a given line may be limited. For example on PAL line
+16 the hardware may be able to look for a VPS or Teletext signal, but
+not both at the same time. Applications can learn about these limits
+using the &VIDIOC-S-FMT; ioctl as described in <xref
+ linkend="sliced" />.</entry>
+ </row>
+ <row>
+ <entry></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry spanname="hspan">Drivers must set
+<structfield>service_lines</structfield>[0][0] and
+<structfield>service_lines</structfield>[1][0] to zero.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>type</structfield></entry>
+ <entry>Type of the data stream, see <xref
+ linkend="v4l2-buf-type" />. Should be
+<constant>V4L2_BUF_TYPE_SLICED_VBI_CAPTURE</constant> or
+<constant>V4L2_BUF_TYPE_SLICED_VBI_OUTPUT</constant>.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved</structfield>[3]</entry>
+ <entry spanname="hspan">This array is reserved for future
+extensions. Applications and drivers must set it to zero.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <!-- See also dev-sliced-vbi.sgml -->
+ <table pgwide="1" frame="none" id="vbi-services">
+ <title>Sliced VBI services</title>
+ <tgroup cols="5">
+ <colspec colname="c1" colwidth="2*" />
+ <colspec colname="c2" colwidth="1*" />
+ <colspec colname="c3" colwidth="1*" />
+ <colspec colname="c4" colwidth="2*" />
+ <colspec colname="c5" colwidth="2*" />
+ <spanspec spanname='rlp' namest='c3' nameend='c5' />
+ <thead>
+ <row>
+ <entry>Symbol</entry>
+ <entry>Value</entry>
+ <entry>Reference</entry>
+ <entry>Lines, usually</entry>
+ <entry>Payload</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_SLICED_TELETEXT_B</constant> (Teletext
+System B)</entry>
+ <entry>0x0001</entry>
+ <entry><xref linkend="ets300706" />, <xref linkend="itu653" /></entry>
+ <entry>PAL/SECAM line 7-22, 320-335 (second field 7-22)</entry>
+ <entry>Last 42 of the 45 byte Teletext packet, that is
+without clock run-in and framing code, lsb first transmitted.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_SLICED_VPS</constant></entry>
+ <entry>0x0400</entry>
+ <entry><xref linkend="ets300231" /></entry>
+ <entry>PAL line 16</entry>
+ <entry>Byte number 3 to 15 according to Figure 9 of
+ETS&nbsp;300&nbsp;231, lsb first transmitted.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_SLICED_CAPTION_525</constant></entry>
+ <entry>0x1000</entry>
+ <entry><xref linkend="cea608" /></entry>
+ <entry>NTSC line 21, 284 (second field 21)</entry>
+ <entry>Two bytes in transmission order, including parity
+bit, lsb first transmitted.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_SLICED_WSS_625</constant></entry>
+ <entry>0x4000</entry>
+ <entry><xref linkend="en300294" />, <xref linkend="itu1119" /></entry>
+ <entry>PAL/SECAM line 23</entry>
+ <entry><screen>
+Byte 0 1
+ msb lsb msb lsb
+Bit 7 6 5 4 3 2 1 0 x x 13 12 11 10 9
+</screen></entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_SLICED_VBI_525</constant></entry>
+ <entry>0x1000</entry>
+ <entry spanname="rlp">Set of services applicable to 525
+line systems.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_SLICED_VBI_625</constant></entry>
+ <entry>0x4401</entry>
+ <entry spanname="rlp">Set of services applicable to 625
+line systems.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The value in the <structfield>type</structfield> field is
+wrong.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-g-std.xml b/Documentation/DocBook/media/v4l/vidioc-g-std.xml
new file mode 100644
index 000000000..4a898417d
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-g-std.xml
@@ -0,0 +1,98 @@
+<refentry id="vidioc-g-std">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_G_STD, VIDIOC_S_STD</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_G_STD</refname>
+ <refname>VIDIOC_S_STD</refname>
+ <refpurpose>Query or select the video standard of the current input</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>v4l2_std_id
+*<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>const v4l2_std_id
+*<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_G_STD, VIDIOC_S_STD</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>To query and select the current video standard applications
+use the <constant>VIDIOC_G_STD</constant> and <constant>VIDIOC_S_STD</constant> ioctls which take a pointer to a
+&v4l2-std-id; type as argument. <constant>VIDIOC_G_STD</constant> can
+return a single flag or a set of flags as in &v4l2-standard; field
+<structfield>id</structfield>. The flags must be unambiguous such
+that they appear in only one enumerated <structname>v4l2_standard</structname> structure.</para>
+
+ <para><constant>VIDIOC_S_STD</constant> accepts one or more
+flags, being a write-only ioctl it does not return the actual new standard as
+<constant>VIDIOC_G_STD</constant> does. When no flags are given or
+the current input does not support the requested standard the driver
+returns an &EINVAL;. When the standard set is ambiguous drivers may
+return <errorcode>EINVAL</errorcode> or choose any of the requested
+standards. If the current input or output does not support standard video timings (e.g. if
+&VIDIOC-ENUMINPUT; does not set the <constant>V4L2_IN_CAP_STD</constant> flag), then
+&ENODATA; is returned.</para>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The <constant>VIDIOC_S_STD</constant> parameter was unsuitable.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>ENODATA</errorcode></term>
+ <listitem>
+ <para>Standard video timings are not supported for this input or output.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-g-tuner.xml b/Documentation/DocBook/media/v4l/vidioc-g-tuner.xml
new file mode 100644
index 000000000..b0d865933
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-g-tuner.xml
@@ -0,0 +1,578 @@
+<refentry id="vidioc-g-tuner">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_G_TUNER, VIDIOC_S_TUNER</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_G_TUNER</refname>
+ <refname>VIDIOC_S_TUNER</refname>
+ <refpurpose>Get or set tuner attributes</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_tuner
+*<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>const struct v4l2_tuner
+*<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_G_TUNER, VIDIOC_S_TUNER</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>To query the attributes of a tuner applications initialize the
+<structfield>index</structfield> field and zero out the
+<structfield>reserved</structfield> array of a &v4l2-tuner; and call the
+<constant>VIDIOC_G_TUNER</constant> ioctl with a pointer to this
+structure. Drivers fill the rest of the structure or return an
+&EINVAL; when the index is out of bounds. To enumerate all tuners
+applications shall begin at index zero, incrementing by one until the
+driver returns <errorcode>EINVAL</errorcode>.</para>
+
+ <para>Tuners have two writable properties, the audio mode and
+the radio frequency. To change the audio mode, applications initialize
+the <structfield>index</structfield>,
+<structfield>audmode</structfield> and
+<structfield>reserved</structfield> fields and call the
+<constant>VIDIOC_S_TUNER</constant> ioctl. This will
+<emphasis>not</emphasis> change the current tuner, which is determined
+by the current video input. Drivers may choose a different audio mode
+if the requested mode is invalid or unsupported. Since this is a
+<!-- FIXME -->write-only ioctl, it does not return the actually
+selected audio mode.</para>
+
+ <para>To change the radio frequency the &VIDIOC-S-FREQUENCY; ioctl
+is available.</para>
+
+ <table pgwide="1" frame="none" id="v4l2-tuner">
+ <title>struct <structname>v4l2_tuner</structname></title>
+ <tgroup cols="3">
+ <colspec colname="c1" colwidth="1*" />
+ <colspec colname="c2" colwidth="1*" />
+ <colspec colname="c3" colwidth="1*" />
+ <colspec colname="c4" colwidth="1*" />
+ <spanspec spanname="hspan" namest="c3" nameend="c4" />
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>index</structfield></entry>
+ <entry spanname="hspan">Identifies the tuner, set by the
+application.</entry>
+ </row>
+ <row>
+ <entry>__u8</entry>
+ <entry><structfield>name</structfield>[32]</entry>
+ <entry spanname="hspan"><para>Name of the tuner, a
+NUL-terminated ASCII string. This information is intended for the
+user.<!-- FIXME Video inputs already have a name, the purpose of this
+field is not quite clear.--></para></entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>type</structfield></entry>
+ <entry spanname="hspan">Type of the tuner, see <xref
+ linkend="v4l2-tuner-type" />.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>capability</structfield></entry>
+ <entry spanname="hspan"><para>Tuner capability flags, see
+<xref linkend="tuner-capability" />. Audio flags indicate the ability
+to decode audio subprograms. They will <emphasis>not</emphasis>
+change, for example with the current video standard.</para><para>When
+the structure refers to a radio tuner the
+<constant>V4L2_TUNER_CAP_LANG1</constant>,
+<constant>V4L2_TUNER_CAP_LANG2</constant> and
+<constant>V4L2_TUNER_CAP_NORM</constant> flags can't be used.</para>
+<para>If multiple frequency bands are supported, then
+<structfield>capability</structfield> is the union of all
+<structfield>capability</structfield> fields of each &v4l2-frequency-band;.
+</para></entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>rangelow</structfield></entry>
+ <entry spanname="hspan">The lowest tunable frequency in
+units of 62.5 kHz, or if the <structfield>capability</structfield>
+flag <constant>V4L2_TUNER_CAP_LOW</constant> is set, in units of 62.5
+Hz, or if the <structfield>capability</structfield> flag
+<constant>V4L2_TUNER_CAP_1HZ</constant> is set, in units of 1 Hz.
+If multiple frequency bands are supported, then
+<structfield>rangelow</structfield> is the lowest frequency
+of all the frequency bands.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>rangehigh</structfield></entry>
+ <entry spanname="hspan">The highest tunable frequency in
+units of 62.5 kHz, or if the <structfield>capability</structfield>
+flag <constant>V4L2_TUNER_CAP_LOW</constant> is set, in units of 62.5
+Hz, or if the <structfield>capability</structfield> flag
+<constant>V4L2_TUNER_CAP_1HZ</constant> is set, in units of 1 Hz.
+If multiple frequency bands are supported, then
+<structfield>rangehigh</structfield> is the highest frequency
+of all the frequency bands.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>rxsubchans</structfield></entry>
+ <entry spanname="hspan"><para>Some tuners or audio
+decoders can determine the received audio subprograms by analyzing
+audio carriers, pilot tones or other indicators. To pass this
+information drivers set flags defined in <xref
+ linkend="tuner-rxsubchans" /> in this field. For
+example:</para></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry><constant>V4L2_TUNER_SUB_MONO</constant></entry>
+ <entry>receiving mono audio</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry><constant>STEREO | SAP</constant></entry>
+ <entry>receiving stereo audio and a secondary audio
+program</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry><constant>MONO | STEREO</constant></entry>
+ <entry>receiving mono or stereo audio, the hardware cannot
+distinguish</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry><constant>LANG1 | LANG2</constant></entry>
+ <entry>receiving bilingual audio</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry><constant>MONO | STEREO | LANG1 | LANG2</constant></entry>
+ <entry>receiving mono, stereo or bilingual
+audio</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry></entry>
+ <entry spanname="hspan"><para>When the
+<constant>V4L2_TUNER_CAP_STEREO</constant>,
+<constant>_LANG1</constant>, <constant>_LANG2</constant> or
+<constant>_SAP</constant> flag is cleared in the
+<structfield>capability</structfield> field, the corresponding
+<constant>V4L2_TUNER_SUB_</constant> flag must not be set
+here.</para><para>This field is valid only if this is the tuner of the
+current video input, or when the structure refers to a radio
+tuner.</para></entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>audmode</structfield></entry>
+ <entry spanname="hspan"><para>The selected audio mode, see
+<xref linkend="tuner-audmode" /> for valid values. The audio mode does
+not affect audio subprogram detection, and like a <link
+linkend="control">control</link> it does not automatically change
+unless the requested mode is invalid or unsupported. See <xref
+ linkend="tuner-matrix" /> for possible results when
+the selected and received audio programs do not
+match.</para><para>Currently this is the only field of struct
+<structname>v4l2_tuner</structname> applications can
+change.</para></entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>signal</structfield></entry>
+ <entry spanname="hspan">The signal strength if known, ranging
+from 0 to 65535. Higher values indicate a better signal.</entry>
+ </row>
+ <row>
+ <entry>__s32</entry>
+ <entry><structfield>afc</structfield></entry>
+ <entry spanname="hspan">Automatic frequency control: When the
+<structfield>afc</structfield> value is negative, the frequency is too
+low, when positive too high.<!-- FIXME need example what to do when it never
+settles at zero, &ie; range is what? --></entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved</structfield>[4]</entry>
+ <entry spanname="hspan">Reserved for future extensions. Drivers and
+applications must set the array to zero.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="v4l2-tuner-type">
+ <title>enum v4l2_tuner_type</title>
+ <tgroup cols="3">
+ &cs-def;
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_TUNER_RADIO</constant></entry>
+ <entry>1</entry>
+ <entry></entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_TUNER_ANALOG_TV</constant></entry>
+ <entry>2</entry>
+ <entry></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="tuner-capability">
+ <title>Tuner and Modulator Capability Flags</title>
+ <tgroup cols="3">
+ &cs-def;
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_TUNER_CAP_LOW</constant></entry>
+ <entry>0x0001</entry>
+ <entry>When set, tuning frequencies are expressed in units of
+62.5 Hz instead of 62.5 kHz.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_TUNER_CAP_NORM</constant></entry>
+ <entry>0x0002</entry>
+ <entry>This is a multi-standard tuner; the video standard
+can or must be switched. (B/G PAL tuners for example are typically not
+ considered multi-standard because the video standard is automatically
+ determined from the frequency band.) The set of supported video
+ standards is available from the &v4l2-input; pointing to this tuner,
+ see the description of ioctl &VIDIOC-ENUMINPUT; for details. Only
+ <constant>V4L2_TUNER_ANALOG_TV</constant> tuners can have this capability.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_TUNER_CAP_HWSEEK_BOUNDED</constant></entry>
+ <entry>0x0004</entry>
+ <entry>If set, then this tuner supports the hardware seek functionality
+ where the seek stops when it reaches the end of the frequency range.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_TUNER_CAP_HWSEEK_WRAP</constant></entry>
+ <entry>0x0008</entry>
+ <entry>If set, then this tuner supports the hardware seek functionality
+ where the seek wraps around when it reaches the end of the frequency range.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_TUNER_CAP_STEREO</constant></entry>
+ <entry>0x0010</entry>
+ <entry>Stereo audio reception is supported.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_TUNER_CAP_LANG1</constant></entry>
+ <entry>0x0040</entry>
+ <entry>Reception of the primary language of a bilingual
+audio program is supported. Bilingual audio is a feature of
+two-channel systems, transmitting the primary language monaural on the
+main audio carrier and a secondary language monaural on a second
+carrier. Only
+ <constant>V4L2_TUNER_ANALOG_TV</constant> tuners can have this capability.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_TUNER_CAP_LANG2</constant></entry>
+ <entry>0x0020</entry>
+ <entry>Reception of the secondary language of a bilingual
+audio program is supported. Only
+ <constant>V4L2_TUNER_ANALOG_TV</constant> tuners can have this capability.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_TUNER_CAP_SAP</constant></entry>
+ <entry>0x0020</entry>
+ <entry><para>Reception of a secondary audio program is
+supported. This is a feature of the BTSC system which accompanies the
+NTSC video standard. Two audio carriers are available for mono or
+stereo transmissions of a primary language, and an independent third
+carrier for a monaural secondary language. Only
+ <constant>V4L2_TUNER_ANALOG_TV</constant> tuners can have this capability.</para><para>Note the
+<constant>V4L2_TUNER_CAP_LANG2</constant> and
+<constant>V4L2_TUNER_CAP_SAP</constant> flags are synonyms.
+<constant>V4L2_TUNER_CAP_SAP</constant> applies when the tuner
+supports the <constant>V4L2_STD_NTSC_M</constant> video
+standard.</para><!-- FIXME what if PAL+NTSC and Bi but not SAP? --></entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_TUNER_CAP_RDS</constant></entry>
+ <entry>0x0080</entry>
+ <entry>RDS capture is supported. This capability is only valid for
+radio tuners.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_TUNER_CAP_RDS_BLOCK_IO</constant></entry>
+ <entry>0x0100</entry>
+ <entry>The RDS data is passed as unparsed RDS blocks.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_TUNER_CAP_RDS_CONTROLS</constant></entry>
+ <entry>0x0200</entry>
+ <entry>The RDS data is parsed by the hardware and set via controls.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_TUNER_CAP_FREQ_BANDS</constant></entry>
+ <entry>0x0400</entry>
+ <entry>The &VIDIOC-ENUM-FREQ-BANDS; ioctl can be used to enumerate
+ the available frequency bands.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_TUNER_CAP_HWSEEK_PROG_LIM</constant></entry>
+ <entry>0x0800</entry>
+ <entry>The range to search when using the hardware seek functionality
+ is programmable, see &VIDIOC-S-HW-FREQ-SEEK; for details.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_TUNER_CAP_1HZ</constant></entry>
+ <entry>0x1000</entry>
+ <entry>When set, tuning frequencies are expressed in units of 1 Hz instead of 62.5 kHz.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="tuner-rxsubchans">
+ <title>Tuner Audio Reception Flags</title>
+ <tgroup cols="3">
+ &cs-def;
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_TUNER_SUB_MONO</constant></entry>
+ <entry>0x0001</entry>
+ <entry>The tuner receives a mono audio signal.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_TUNER_SUB_STEREO</constant></entry>
+ <entry>0x0002</entry>
+ <entry>The tuner receives a stereo audio signal.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_TUNER_SUB_LANG1</constant></entry>
+ <entry>0x0008</entry>
+ <entry>The tuner receives the primary language of a
+bilingual audio signal. Drivers must clear this flag when the current
+video standard is <constant>V4L2_STD_NTSC_M</constant>.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_TUNER_SUB_LANG2</constant></entry>
+ <entry>0x0004</entry>
+ <entry>The tuner receives the secondary language of a
+bilingual audio signal (or a second audio program).</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_TUNER_SUB_SAP</constant></entry>
+ <entry>0x0004</entry>
+ <entry>The tuner receives a Second Audio Program. Note the
+<constant>V4L2_TUNER_SUB_LANG2</constant> and
+<constant>V4L2_TUNER_SUB_SAP</constant> flags are synonyms. The
+<constant>V4L2_TUNER_SUB_SAP</constant> flag applies when the
+current video standard is <constant>V4L2_STD_NTSC_M</constant>.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_TUNER_SUB_RDS</constant></entry>
+ <entry>0x0010</entry>
+ <entry>The tuner receives an RDS channel.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="tuner-audmode">
+ <title>Tuner Audio Modes</title>
+ <tgroup cols="3">
+ &cs-def;
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_TUNER_MODE_MONO</constant></entry>
+ <entry>0</entry>
+ <entry>Play mono audio. When the tuner receives a stereo
+signal this a down-mix of the left and right channel. When the tuner
+receives a bilingual or SAP signal this mode selects the primary
+language.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_TUNER_MODE_STEREO</constant></entry>
+ <entry>1</entry>
+ <entry><para>Play stereo audio. When the tuner receives
+bilingual audio it may play different languages on the left and right
+channel or the primary language is played on both channels.</para><para>Playing
+different languages in this mode is
+deprecated. New drivers should do this only in
+<constant>MODE_LANG1_LANG2</constant>.</para><para>When the tuner
+receives no stereo signal or does not support stereo reception the
+driver shall fall back to <constant>MODE_MONO</constant>.</para></entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_TUNER_MODE_LANG1</constant></entry>
+ <entry>3</entry>
+ <entry>Play the primary language, mono or stereo. Only
+<constant>V4L2_TUNER_ANALOG_TV</constant> tuners support this
+mode.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_TUNER_MODE_LANG2</constant></entry>
+ <entry>2</entry>
+ <entry>Play the secondary language, mono. When the tuner
+receives no bilingual audio or SAP, or their reception is not
+supported the driver shall fall back to mono or stereo mode. Only
+<constant>V4L2_TUNER_ANALOG_TV</constant> tuners support this
+mode.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_TUNER_MODE_SAP</constant></entry>
+ <entry>2</entry>
+ <entry>Play the Second Audio Program. When the tuner
+receives no bilingual audio or SAP, or their reception is not
+supported the driver shall fall back to mono or stereo mode. Only
+<constant>V4L2_TUNER_ANALOG_TV</constant> tuners support this mode.
+Note the <constant>V4L2_TUNER_MODE_LANG2</constant> and
+<constant>V4L2_TUNER_MODE_SAP</constant> are synonyms.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_TUNER_MODE_LANG1_LANG2</constant></entry>
+ <entry>4</entry>
+ <entry>Play the primary language on the left channel, the
+secondary language on the right channel. When the tuner receives no
+bilingual audio or SAP, it shall fall back to
+<constant>MODE_LANG1</constant> or <constant>MODE_MONO</constant>.
+Only <constant>V4L2_TUNER_ANALOG_TV</constant> tuners support this
+mode.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="all" id="tuner-matrix">
+ <title>Tuner Audio Matrix</title>
+ <tgroup cols="6" align="center">
+ <colspec align="left" />
+ <colspec colname="c2" colwidth="1*" />
+ <colspec colwidth="1*" />
+ <colspec colwidth="1*" />
+ <colspec colnum="6" colname="c6" colwidth="1*" />
+ <spanspec namest="c2" nameend="c6" spanname="hspan" align="center" />
+ <thead>
+ <row>
+ <entry></entry>
+ <entry spanname="hspan">Selected
+<constant>V4L2_TUNER_MODE_</constant></entry>
+ </row>
+ <row>
+ <entry>Received <constant>V4L2_TUNER_SUB_</constant></entry>
+ <entry><constant>MONO</constant></entry>
+ <entry><constant>STEREO</constant></entry>
+ <entry><constant>LANG1</constant></entry>
+ <entry><constant>LANG2 = SAP</constant></entry>
+ <entry><constant>LANG1_LANG2</constant><footnote><para>This
+mode has been added in Linux 2.6.17 and may not be supported by older
+drivers.</para></footnote></entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row>
+ <entry><constant>MONO</constant></entry>
+ <entry>Mono</entry>
+ <entry>Mono/Mono</entry>
+ <entry>Mono</entry>
+ <entry>Mono</entry>
+ <entry>Mono/Mono</entry>
+ </row>
+ <row>
+ <entry><constant>MONO | SAP</constant></entry>
+ <entry>Mono</entry>
+ <entry>Mono/Mono</entry>
+ <entry>Mono</entry>
+ <entry>SAP</entry>
+ <entry>Mono/SAP (preferred) or Mono/Mono</entry>
+ </row>
+ <row>
+ <entry><constant>STEREO</constant></entry>
+ <entry>L+R</entry>
+ <entry>L/R</entry>
+ <entry>Stereo L/R (preferred) or Mono L+R</entry>
+ <entry>Stereo L/R (preferred) or Mono L+R</entry>
+ <entry>L/R (preferred) or L+R/L+R</entry>
+ </row>
+ <row>
+ <entry><constant>STEREO | SAP</constant></entry>
+ <entry>L+R</entry>
+ <entry>L/R</entry>
+ <entry>Stereo L/R (preferred) or Mono L+R</entry>
+ <entry>SAP</entry>
+ <entry>L+R/SAP (preferred) or L/R or L+R/L+R</entry>
+ </row>
+ <row>
+ <entry><constant>LANG1 | LANG2</constant></entry>
+ <entry>Language&nbsp;1</entry>
+ <entry>Lang1/Lang2 (deprecated<footnote><para>Playback of
+both languages in <constant>MODE_STEREO</constant> is deprecated. In
+the future drivers should produce only the primary language in this
+mode. Applications should request
+<constant>MODE_LANG1_LANG2</constant> to record both languages or a
+stereo signal.</para></footnote>) or
+Lang1/Lang1</entry>
+ <entry>Language&nbsp;1</entry>
+ <entry>Language&nbsp;2</entry>
+ <entry>Lang1/Lang2 (preferred) or Lang1/Lang1</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The &v4l2-tuner; <structfield>index</structfield> is
+out of bounds.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-log-status.xml b/Documentation/DocBook/media/v4l/vidioc-log-status.xml
new file mode 100644
index 000000000..5ded7d35e
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-log-status.xml
@@ -0,0 +1,41 @@
+<refentry id="vidioc-log-status">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_LOG_STATUS</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_LOG_STATUS</refname>
+ <refpurpose>Log driver status information</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>As the video/audio devices become more complicated it
+becomes harder to debug problems. When this ioctl is called the driver
+will output the current device status to the kernel log. This is
+particular useful when dealing with problems like no sound, no video
+and incorrectly tuned channels. Also many modern devices autodetect
+video and audio standards and this ioctl will report what the device
+thinks what the standard is. Mismatches may give an indication where
+the problem is.</para>
+
+ <para>This ioctl is optional and not all drivers support it. It
+was introduced in Linux 2.6.15.</para>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-overlay.xml b/Documentation/DocBook/media/v4l/vidioc-overlay.xml
new file mode 100644
index 000000000..250a7de18
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-overlay.xml
@@ -0,0 +1,74 @@
+<refentry id="vidioc-overlay">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_OVERLAY</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_OVERLAY</refname>
+ <refpurpose>Start or stop video overlay</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>const int *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_OVERLAY</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>This ioctl is part of the <link linkend="overlay">video
+ overlay</link> I/O method. Applications call
+ <constant>VIDIOC_OVERLAY</constant> to start or stop the
+ overlay. It takes a pointer to an integer which must be set to
+ zero by the application to stop overlay, to one to start.</para>
+
+ <para>Drivers do not support &VIDIOC-STREAMON; or
+&VIDIOC-STREAMOFF; with <constant>V4L2_BUF_TYPE_VIDEO_OVERLAY</constant>.</para>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The overlay parameters have not been set up. See <xref
+linkend="overlay" /> for the necessary steps.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-prepare-buf.xml b/Documentation/DocBook/media/v4l/vidioc-prepare-buf.xml
new file mode 100644
index 000000000..fa7ad7e33
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-prepare-buf.xml
@@ -0,0 +1,94 @@
+<refentry id="vidioc-prepare-buf">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_PREPARE_BUF</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_PREPARE_BUF</refname>
+ <refpurpose>Prepare a buffer for I/O</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_buffer *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_PREPARE_BUF</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <note>
+ <title>Experimental</title>
+ <para>This is an <link linkend="experimental"> experimental </link>
+ interface and may change in the future.</para>
+ </note>
+
+ <para>Applications can optionally call the
+<constant>VIDIOC_PREPARE_BUF</constant> ioctl to pass ownership of the buffer
+to the driver before actually enqueuing it, using the
+<constant>VIDIOC_QBUF</constant> ioctl, and to prepare it for future I/O.
+Such preparations may include cache invalidation or cleaning. Performing them
+in advance saves time during the actual I/O. In case such cache operations are
+not required, the application can use one of
+<constant>V4L2_BUF_FLAG_NO_CACHE_INVALIDATE</constant> and
+<constant>V4L2_BUF_FLAG_NO_CACHE_CLEAN</constant> flags to skip the respective
+step.</para>
+
+ <para>The <structname>v4l2_buffer</structname> structure is
+specified in <xref linkend="buffer" />.</para>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EBUSY</errorcode></term>
+ <listitem>
+ <para>File I/O is in progress.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The buffer <structfield>type</structfield> is not
+supported, or the <structfield>index</structfield> is out of bounds,
+or no buffers have been allocated yet, or the
+<structfield>userptr</structfield> or
+<structfield>length</structfield> are invalid.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-qbuf.xml b/Documentation/DocBook/media/v4l/vidioc-qbuf.xml
new file mode 100644
index 000000000..3504a7f2f
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-qbuf.xml
@@ -0,0 +1,192 @@
+<refentry id="vidioc-qbuf">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_QBUF, VIDIOC_DQBUF</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_QBUF</refname>
+ <refname>VIDIOC_DQBUF</refname>
+ <refpurpose>Exchange a buffer with the driver</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_buffer *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_QBUF, VIDIOC_DQBUF</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>Applications call the <constant>VIDIOC_QBUF</constant> ioctl
+to enqueue an empty (capturing) or filled (output) buffer in the
+driver's incoming queue. The semantics depend on the selected I/O
+method.</para>
+
+ <para>To enqueue a buffer applications set the <structfield>type</structfield>
+field of a &v4l2-buffer; to the same buffer type as was previously used
+with &v4l2-format; <structfield>type</structfield> and &v4l2-requestbuffers;
+<structfield>type</structfield>. Applications must also set the
+<structfield>index</structfield> field. Valid index numbers range from
+zero to the number of buffers allocated with &VIDIOC-REQBUFS;
+(&v4l2-requestbuffers; <structfield>count</structfield>) minus one. The
+contents of the struct <structname>v4l2_buffer</structname> returned
+by a &VIDIOC-QUERYBUF; ioctl will do as well. When the buffer is
+intended for output (<structfield>type</structfield> is
+<constant>V4L2_BUF_TYPE_VIDEO_OUTPUT</constant>,
+<constant>V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE</constant>, or
+<constant>V4L2_BUF_TYPE_VBI_OUTPUT</constant>) applications must also
+initialize the <structfield>bytesused</structfield>,
+<structfield>field</structfield> and
+<structfield>timestamp</structfield> fields, see <xref
+linkend="buffer" /> for details.
+Applications must also set <structfield>flags</structfield> to 0.
+The <structfield>reserved2</structfield> and
+<structfield>reserved</structfield> fields must be set to 0. When using
+the <link linkend="planar-apis">multi-planar API</link>, the
+<structfield>m.planes</structfield> field must contain a userspace pointer
+to a filled-in array of &v4l2-plane; and the <structfield>length</structfield>
+field must be set to the number of elements in that array.
+</para>
+
+ <para>To enqueue a <link linkend="mmap">memory mapped</link>
+buffer applications set the <structfield>memory</structfield>
+field to <constant>V4L2_MEMORY_MMAP</constant>. When
+<constant>VIDIOC_QBUF</constant> is called with a pointer to this
+structure the driver sets the
+<constant>V4L2_BUF_FLAG_MAPPED</constant> and
+<constant>V4L2_BUF_FLAG_QUEUED</constant> flags and clears the
+<constant>V4L2_BUF_FLAG_DONE</constant> flag in the
+<structfield>flags</structfield> field, or it returns an
+&EINVAL;.</para>
+
+ <para>To enqueue a <link linkend="userp">user pointer</link>
+buffer applications set the <structfield>memory</structfield>
+field to <constant>V4L2_MEMORY_USERPTR</constant>, the
+<structfield>m.userptr</structfield> field to the address of the
+buffer and <structfield>length</structfield> to its size. When the multi-planar
+API is used, <structfield>m.userptr</structfield> and
+<structfield>length</structfield> members of the passed array of &v4l2-plane;
+have to be used instead. When <constant>VIDIOC_QBUF</constant> is called with
+a pointer to this structure the driver sets the
+<constant>V4L2_BUF_FLAG_QUEUED</constant> flag and clears the
+<constant>V4L2_BUF_FLAG_MAPPED</constant> and
+<constant>V4L2_BUF_FLAG_DONE</constant> flags in the
+<structfield>flags</structfield> field, or it returns an error code.
+This ioctl locks the memory pages of the buffer in physical memory,
+they cannot be swapped out to disk. Buffers remain locked until
+dequeued, until the &VIDIOC-STREAMOFF; or &VIDIOC-REQBUFS; ioctl is
+called, or until the device is closed.</para>
+
+ <para>To enqueue a <link linkend="dmabuf">DMABUF</link> buffer applications
+set the <structfield>memory</structfield> field to
+<constant>V4L2_MEMORY_DMABUF</constant> and the <structfield>m.fd</structfield>
+field to a file descriptor associated with a DMABUF buffer. When the
+multi-planar API is used the <structfield>m.fd</structfield> fields of the
+passed array of &v4l2-plane; have to be used instead. When
+<constant>VIDIOC_QBUF</constant> is called with a pointer to this structure the
+driver sets the <constant>V4L2_BUF_FLAG_QUEUED</constant> flag and clears the
+<constant>V4L2_BUF_FLAG_MAPPED</constant> and
+<constant>V4L2_BUF_FLAG_DONE</constant> flags in the
+<structfield>flags</structfield> field, or it returns an error code. This
+ioctl locks the buffer. Locking a buffer means passing it to a driver for a
+hardware access (usually DMA). If an application accesses (reads/writes) a
+locked buffer then the result is undefined. Buffers remain locked until
+dequeued, until the &VIDIOC-STREAMOFF; or &VIDIOC-REQBUFS; ioctl is called, or
+until the device is closed.</para>
+
+ <para>Applications call the <constant>VIDIOC_DQBUF</constant>
+ioctl to dequeue a filled (capturing) or displayed (output) buffer
+from the driver's outgoing queue. They just set the
+<structfield>type</structfield>, <structfield>memory</structfield>
+and <structfield>reserved</structfield>
+fields of a &v4l2-buffer; as above, when <constant>VIDIOC_DQBUF</constant>
+is called with a pointer to this structure the driver fills the
+remaining fields or returns an error code. The driver may also set
+<constant>V4L2_BUF_FLAG_ERROR</constant> in the <structfield>flags</structfield>
+field. It indicates a non-critical (recoverable) streaming error. In such case
+the application may continue as normal, but should be aware that data in the
+dequeued buffer might be corrupted. When using the multi-planar API, the
+planes array must be passed in as well.</para>
+
+ <para>By default <constant>VIDIOC_DQBUF</constant> blocks when no
+buffer is in the outgoing queue. When the
+<constant>O_NONBLOCK</constant> flag was given to the &func-open;
+function, <constant>VIDIOC_DQBUF</constant> returns immediately
+with an &EAGAIN; when no buffer is available.</para>
+
+ <para>The <structname>v4l2_buffer</structname> structure is
+specified in <xref linkend="buffer" />.</para>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EAGAIN</errorcode></term>
+ <listitem>
+ <para>Non-blocking I/O has been selected using
+<constant>O_NONBLOCK</constant> and no buffer was in the outgoing
+queue.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The buffer <structfield>type</structfield> is not
+supported, or the <structfield>index</structfield> is out of bounds,
+or no buffers have been allocated yet, or the
+<structfield>userptr</structfield> or
+<structfield>length</structfield> are invalid.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EIO</errorcode></term>
+ <listitem>
+ <para><constant>VIDIOC_DQBUF</constant> failed due to an
+internal error. Can also indicate temporary problems like signal
+loss. Note the driver might dequeue an (empty) buffer despite
+returning an error, or even stop capturing. Reusing such buffer may be unsafe
+though and its details (e.g. <structfield>index</structfield>) may not be
+returned either. It is recommended that drivers indicate recoverable errors
+by setting the <constant>V4L2_BUF_FLAG_ERROR</constant> and returning 0 instead.
+In that case the application should be able to safely reuse the buffer and
+continue streaming.
+ </para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-query-dv-timings.xml b/Documentation/DocBook/media/v4l/vidioc-query-dv-timings.xml
new file mode 100644
index 000000000..e185f149e
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-query-dv-timings.xml
@@ -0,0 +1,110 @@
+<refentry id="vidioc-query-dv-timings">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_QUERY_DV_TIMINGS</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_QUERY_DV_TIMINGS</refname>
+ <refpurpose>Sense the DV preset received by the current
+input</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_dv_timings *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_QUERY_DV_TIMINGS</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <note>
+ <title>Experimental</title>
+ <para>This is an <link linkend="experimental"> experimental </link>
+ interface and may change in the future.</para>
+ </note>
+
+ <para>The hardware may be able to detect the current DV timings
+automatically, similar to sensing the video standard. To do so, applications
+call <constant>VIDIOC_QUERY_DV_TIMINGS</constant> with a pointer to a
+&v4l2-dv-timings;. Once the hardware detects the timings, it will fill in the
+timings structure.
+
+If the timings could not be detected because there was no signal, then
+<errorcode>ENOLINK</errorcode> is returned. If a signal was detected, but
+it was unstable and the receiver could not lock to the signal, then
+<errorcode>ENOLCK</errorcode> is returned. If the receiver could lock to the signal,
+but the format is unsupported (e.g. because the pixelclock is out of range
+of the hardware capabilities), then the driver fills in whatever timings it
+could find and returns <errorcode>ERANGE</errorcode>. In that case the application
+can call &VIDIOC-DV-TIMINGS-CAP; to compare the found timings with the hardware's
+capabilities in order to give more precise feedback to the user.
+</para>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>ENODATA</errorcode></term>
+ <listitem>
+ <para>Digital video timings are not supported for this input or output.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>ENOLINK</errorcode></term>
+ <listitem>
+ <para>No timings could be detected because no signal was found.
+</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>ENOLCK</errorcode></term>
+ <listitem>
+ <para>The signal was unstable and the hardware could not lock on to it.
+</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>ERANGE</errorcode></term>
+ <listitem>
+ <para>Timings were found, but they are out of range of the hardware
+capabilities.
+</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-querybuf.xml b/Documentation/DocBook/media/v4l/vidioc-querybuf.xml
new file mode 100644
index 000000000..a597155c0
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-querybuf.xml
@@ -0,0 +1,105 @@
+<refentry id="vidioc-querybuf">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_QUERYBUF</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_QUERYBUF</refname>
+ <refpurpose>Query the status of a buffer</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_buffer *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_QUERYBUF</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>This ioctl is part of the <link linkend="mmap">streaming
+</link> I/O method. It can be used to query the status of a
+buffer at any time after buffers have been allocated with the
+&VIDIOC-REQBUFS; ioctl.</para>
+
+ <para>Applications set the <structfield>type</structfield> field
+ of a &v4l2-buffer; to the same buffer type as was previously used with
+&v4l2-format; <structfield>type</structfield> and &v4l2-requestbuffers;
+<structfield>type</structfield>, and the <structfield>index</structfield>
+ field. Valid index numbers range from zero
+to the number of buffers allocated with &VIDIOC-REQBUFS;
+ (&v4l2-requestbuffers; <structfield>count</structfield>) minus one.
+The <structfield>reserved</structfield> field should to set to 0.
+When using the <link linkend="planar-apis">multi-planar API</link>, the
+<structfield>m.planes</structfield> field must contain a userspace pointer to an
+array of &v4l2-plane; and the <structfield>length</structfield> field has
+to be set to the number of elements in that array.
+After calling <constant>VIDIOC_QUERYBUF</constant> with a pointer to
+ this structure drivers return an error code or fill the rest of
+the structure.</para>
+
+ <para>In the <structfield>flags</structfield> field the
+<constant>V4L2_BUF_FLAG_MAPPED</constant>,
+<constant>V4L2_BUF_FLAG_PREPARED</constant>,
+<constant>V4L2_BUF_FLAG_QUEUED</constant> and
+<constant>V4L2_BUF_FLAG_DONE</constant> flags will be valid. The
+<structfield>memory</structfield> field will be set to the current
+I/O method. For the single-planar API, the <structfield>m.offset</structfield>
+contains the offset of the buffer from the start of the device memory,
+the <structfield>length</structfield> field its size. For the multi-planar API,
+fields <structfield>m.mem_offset</structfield> and
+<structfield>length</structfield> in the <structfield>m.planes</structfield>
+array elements will be used instead and the <structfield>length</structfield>
+field of &v4l2-buffer; is set to the number of filled-in array elements.
+The driver may or may not set the remaining fields and flags, they are
+meaningless in this context.</para>
+
+ <para>The <structname>v4l2_buffer</structname> structure is
+ specified in <xref linkend="buffer" />.</para>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The buffer <structfield>type</structfield> is not
+supported, or the <structfield>index</structfield> is out of bounds.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-querycap.xml b/Documentation/DocBook/media/v4l/vidioc-querycap.xml
new file mode 100644
index 000000000..20fda75a0
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-querycap.xml
@@ -0,0 +1,344 @@
+<refentry id="vidioc-querycap">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_QUERYCAP</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_QUERYCAP</refname>
+ <refpurpose>Query device capabilities</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_capability *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_QUERYCAP</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>All V4L2 devices support the
+<constant>VIDIOC_QUERYCAP</constant> ioctl. It is used to identify
+kernel devices compatible with this specification and to obtain
+information about driver and hardware capabilities. The ioctl takes a
+pointer to a &v4l2-capability; which is filled by the driver. When the
+driver is not compatible with this specification the ioctl returns an
+&EINVAL;.</para>
+
+ <table pgwide="1" frame="none" id="v4l2-capability">
+ <title>struct <structname>v4l2_capability</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u8</entry>
+ <entry><structfield>driver</structfield>[16]</entry>
+ <entry><para>Name of the driver, a unique NUL-terminated
+ASCII string. For example: "bttv". Driver specific applications can
+use this information to verify the driver identity. It is also useful
+to work around known bugs, or to identify drivers in error reports.</para>
+<para>Storing strings in fixed sized arrays is bad
+practice but unavoidable here. Drivers and applications should take
+precautions to never read or write beyond the end of the array and to
+make sure the strings are properly NUL-terminated.</para></entry>
+ </row>
+ <row>
+ <entry>__u8</entry>
+ <entry><structfield>card</structfield>[32]</entry>
+ <entry>Name of the device, a NUL-terminated UTF-8 string.
+For example: "Yoyodyne TV/FM". One driver may support different brands
+or models of video hardware. This information is intended for users,
+for example in a menu of available devices. Since multiple TV cards of
+the same brand may be installed which are supported by the same
+driver, this name should be combined with the character device file
+name (&eg; <filename>/dev/video2</filename>) or the
+<structfield>bus_info</structfield> string to avoid
+ambiguities.</entry>
+ </row>
+ <row>
+ <entry>__u8</entry>
+ <entry><structfield>bus_info</structfield>[32]</entry>
+ <entry>Location of the device in the system, a
+NUL-terminated ASCII string. For example: "PCI:0000:05:06.0". This
+information is intended for users, to distinguish multiple
+identical devices. If no such information is available the field must
+simply count the devices controlled by the driver ("platform:vivi-000").
+The bus_info must start with "PCI:" for PCI boards, "PCIe:" for PCI Express boards,
+"usb-" for USB devices, "I2C:" for i2c devices, "ISA:" for ISA devices,
+"parport" for parallel port devices and "platform:" for platform devices.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>version</structfield></entry>
+ <entry><para>Version number of the driver.</para>
+<para>Starting with kernel 3.1, the version reported is provided by the
+V4L2 subsystem following the kernel numbering scheme. However, it
+may not always return the same version as the kernel if, for example,
+a stable or distribution-modified kernel uses the V4L2 stack from a
+newer kernel.</para>
+<para>The version number is formatted using the
+<constant>KERNEL_VERSION()</constant> macro:</para></entry>
+ </row>
+ <row>
+ <entry spanname="hspan"><para>
+<programlisting>
+#define KERNEL_VERSION(a,b,c) (((a) &lt;&lt; 16) + ((b) &lt;&lt; 8) + (c))
+
+__u32 version = KERNEL_VERSION(0, 8, 1);
+
+printf ("Version: %u.%u.%u\n",
+ (version &gt;&gt; 16) &amp; 0xFF,
+ (version &gt;&gt; 8) &amp; 0xFF,
+ version &amp; 0xFF);
+</programlisting></para></entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>capabilities</structfield></entry>
+ <entry>Available capabilities of the physical device as a whole, see <xref
+ linkend="device-capabilities" />. The same physical device can export
+ multiple devices in /dev (e.g. /dev/videoX, /dev/vbiY and /dev/radioZ).
+ The <structfield>capabilities</structfield> field should contain a union
+ of all capabilities available around the several V4L2 devices exported
+ to userspace.
+ For all those devices the <structfield>capabilities</structfield> field
+ returns the same set of capabilities. This allows applications to open
+ just one of the devices (typically the video device) and discover whether
+ video, vbi and/or radio are also supported.
+ </entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>device_caps</structfield></entry>
+ <entry>Device capabilities of the opened device, see <xref
+ linkend="device-capabilities" />. Should contain the available capabilities
+ of that specific device node. So, for example, <structfield>device_caps</structfield>
+ of a radio device will only contain radio related capabilities and
+ no video or vbi capabilities. This field is only set if the <structfield>capabilities</structfield>
+ field contains the <constant>V4L2_CAP_DEVICE_CAPS</constant> capability.
+ Only the <structfield>capabilities</structfield> field can have the
+ <constant>V4L2_CAP_DEVICE_CAPS</constant> capability, <structfield>device_caps</structfield>
+ will never set <constant>V4L2_CAP_DEVICE_CAPS</constant>.
+ </entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved</structfield>[3]</entry>
+ <entry>Reserved for future extensions. Drivers must set
+this array to zero.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="device-capabilities">
+ <title>Device Capabilities Flags</title>
+ <tgroup cols="3">
+ &cs-def;
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_CAP_VIDEO_CAPTURE</constant></entry>
+ <entry>0x00000001</entry>
+ <entry>The device supports the single-planar API through the <link
+linkend="capture">Video Capture</link> interface.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CAP_VIDEO_CAPTURE_MPLANE</constant></entry>
+ <entry>0x00001000</entry>
+ <entry>The device supports the
+ <link linkend="planar-apis">multi-planar API</link> through the
+ <link linkend="capture">Video Capture</link> interface.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CAP_VIDEO_OUTPUT</constant></entry>
+ <entry>0x00000002</entry>
+ <entry>The device supports the single-planar API through the <link
+linkend="output">Video Output</link> interface.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CAP_VIDEO_OUTPUT_MPLANE</constant></entry>
+ <entry>0x00002000</entry>
+ <entry>The device supports the
+ <link linkend="planar-apis">multi-planar API</link> through the
+ <link linkend="output">Video Output</link> interface.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CAP_VIDEO_M2M</constant></entry>
+ <entry>0x00004000</entry>
+ <entry>The device supports the single-planar API through the
+ Video Memory-To-Memory interface.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CAP_VIDEO_M2M_MPLANE</constant></entry>
+ <entry>0x00008000</entry>
+ <entry>The device supports the
+ <link linkend="planar-apis">multi-planar API</link> through the
+ Video Memory-To-Memory interface.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CAP_VIDEO_OVERLAY</constant></entry>
+ <entry>0x00000004</entry>
+ <entry>The device supports the <link
+linkend="overlay">Video Overlay</link> interface. A video overlay device
+typically stores captured images directly in the video memory of a
+graphics card, with hardware clipping and scaling.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CAP_VBI_CAPTURE</constant></entry>
+ <entry>0x00000010</entry>
+ <entry>The device supports the <link linkend="raw-vbi">Raw
+VBI Capture</link> interface, providing Teletext and Closed Caption
+data.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CAP_VBI_OUTPUT</constant></entry>
+ <entry>0x00000020</entry>
+ <entry>The device supports the <link linkend="raw-vbi">Raw VBI Output</link> interface.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CAP_SLICED_VBI_CAPTURE</constant></entry>
+ <entry>0x00000040</entry>
+ <entry>The device supports the <link linkend="sliced">Sliced VBI Capture</link> interface.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CAP_SLICED_VBI_OUTPUT</constant></entry>
+ <entry>0x00000080</entry>
+ <entry>The device supports the <link linkend="sliced">Sliced VBI Output</link> interface.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CAP_RDS_CAPTURE</constant></entry>
+ <entry>0x00000100</entry>
+ <entry>The device supports the <link linkend="rds">RDS</link> capture interface.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CAP_VIDEO_OUTPUT_OVERLAY</constant></entry>
+ <entry>0x00000200</entry>
+ <entry>The device supports the <link linkend="osd">Video
+Output Overlay</link> (OSD) interface. Unlike the <wordasword>Video
+Overlay</wordasword> interface, this is a secondary function of video
+output devices and overlays an image onto an outgoing video signal.
+When the driver sets this flag, it must clear the
+<constant>V4L2_CAP_VIDEO_OVERLAY</constant> flag and vice
+versa.<footnote><para>The &v4l2-framebuffer; lacks an
+&v4l2-buf-type; field, therefore the type of overlay is implied by the
+driver capabilities.</para></footnote></entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CAP_HW_FREQ_SEEK</constant></entry>
+ <entry>0x00000400</entry>
+ <entry>The device supports the &VIDIOC-S-HW-FREQ-SEEK; ioctl for
+hardware frequency seeking.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CAP_RDS_OUTPUT</constant></entry>
+ <entry>0x00000800</entry>
+ <entry>The device supports the <link linkend="rds">RDS</link> output interface.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CAP_TUNER</constant></entry>
+ <entry>0x00010000</entry>
+ <entry>The device has some sort of tuner to
+receive RF-modulated video signals. For more information about
+tuner programming see
+<xref linkend="tuner" />.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CAP_AUDIO</constant></entry>
+ <entry>0x00020000</entry>
+ <entry>The device has audio inputs or outputs. It may or
+may not support audio recording or playback, in PCM or compressed
+formats. PCM audio support must be implemented as ALSA or OSS
+interface. For more information on audio inputs and outputs see <xref
+ linkend="audio" />.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CAP_RADIO</constant></entry>
+ <entry>0x00040000</entry>
+ <entry>This is a radio receiver.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CAP_MODULATOR</constant></entry>
+ <entry>0x00080000</entry>
+ <entry>The device has some sort of modulator to
+emit RF-modulated video/audio signals. For more information about
+modulator programming see
+<xref linkend="tuner" />.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CAP_SDR_CAPTURE</constant></entry>
+ <entry>0x00100000</entry>
+ <entry>The device supports the
+<link linkend="sdr">SDR Capture</link> interface.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CAP_EXT_PIX_FORMAT</constant></entry>
+ <entry>0x00200000</entry>
+ <entry>The device supports the &v4l2-pix-format; extended
+fields.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CAP_READWRITE</constant></entry>
+ <entry>0x01000000</entry>
+ <entry>The device supports the <link
+linkend="rw">read()</link> and/or <link linkend="rw">write()</link>
+I/O methods.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CAP_ASYNCIO</constant></entry>
+ <entry>0x02000000</entry>
+ <entry>The device supports the <link
+linkend="async">asynchronous</link> I/O methods.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CAP_STREAMING</constant></entry>
+ <entry>0x04000000</entry>
+ <entry>The device supports the <link
+linkend="mmap">streaming</link> I/O method.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CAP_DEVICE_CAPS</constant></entry>
+ <entry>0x80000000</entry>
+ <entry>The driver fills the <structfield>device_caps</structfield>
+ field. This capability can only appear in the <structfield>capabilities</structfield>
+ field and never in the <structfield>device_caps</structfield> field.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-queryctrl.xml b/Documentation/DocBook/media/v4l/vidioc-queryctrl.xml
new file mode 100644
index 000000000..dc83ad70f
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-queryctrl.xml
@@ -0,0 +1,650 @@
+<refentry id="vidioc-queryctrl">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_QUERYCTRL, VIDIOC_QUERY_EXT_CTRL, VIDIOC_QUERYMENU</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_QUERYCTRL</refname>
+ <refname>VIDIOC_QUERY_EXT_CTRL</refname>
+ <refname>VIDIOC_QUERYMENU</refname>
+ <refpurpose>Enumerate controls and menu control items</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_queryctrl *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_query_ext_ctrl *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_querymenu *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_QUERYCTRL, VIDIOC_QUERY_EXT_CTRL, VIDIOC_QUERYMENU</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>To query the attributes of a control applications set the
+<structfield>id</structfield> field of a &v4l2-queryctrl; and call the
+<constant>VIDIOC_QUERYCTRL</constant> ioctl with a pointer to this
+structure. The driver fills the rest of the structure or returns an
+&EINVAL; when the <structfield>id</structfield> is invalid.</para>
+
+ <para>It is possible to enumerate controls by calling
+<constant>VIDIOC_QUERYCTRL</constant> with successive
+<structfield>id</structfield> values starting from
+<constant>V4L2_CID_BASE</constant> up to and exclusive
+<constant>V4L2_CID_LASTP1</constant>. Drivers may return
+<errorcode>EINVAL</errorcode> if a control in this range is not
+supported. Further applications can enumerate private controls, which
+are not defined in this specification, by starting at
+<constant>V4L2_CID_PRIVATE_BASE</constant> and incrementing
+<structfield>id</structfield> until the driver returns
+<errorcode>EINVAL</errorcode>.</para>
+
+ <para>In both cases, when the driver sets the
+<constant>V4L2_CTRL_FLAG_DISABLED</constant> flag in the
+<structfield>flags</structfield> field this control is permanently
+disabled and should be ignored by the application.<footnote>
+ <para><constant>V4L2_CTRL_FLAG_DISABLED</constant> was
+intended for two purposes: Drivers can skip predefined controls not
+supported by the hardware (although returning EINVAL would do as
+well), or disable predefined and private controls after hardware
+detection without the trouble of reordering control arrays and indices
+(EINVAL cannot be used to skip private controls because it would
+prematurely end the enumeration).</para></footnote></para>
+
+ <para>When the application ORs <structfield>id</structfield> with
+<constant>V4L2_CTRL_FLAG_NEXT_CTRL</constant> the driver returns the
+next supported non-compound control, or <errorcode>EINVAL</errorcode>
+if there is none. In addition, the <constant>V4L2_CTRL_FLAG_NEXT_COMPOUND</constant>
+flag can be specified to enumerate all compound controls (i.e. controls
+with type &ge; <constant>V4L2_CTRL_COMPOUND_TYPES</constant>). Specify both
+<constant>V4L2_CTRL_FLAG_NEXT_CTRL</constant> and
+<constant>V4L2_CTRL_FLAG_NEXT_COMPOUND</constant> in order to enumerate
+all controls, compound or not. Drivers which do not support these flags yet
+always return <errorcode>EINVAL</errorcode>.</para>
+
+ <para>The <constant>VIDIOC_QUERY_EXT_CTRL</constant> ioctl was
+introduced in order to better support controls that can use compound
+types, and to expose additional control information that cannot be
+returned in &v4l2-queryctrl; since that structure is full.</para>
+
+ <para><constant>VIDIOC_QUERY_EXT_CTRL</constant> is used in the
+same way as <constant>VIDIOC_QUERYCTRL</constant>, except that the
+<structfield>reserved</structfield> array must be zeroed as well.</para>
+
+ <para>Additional information is required for menu controls: the
+names of the menu items. To query them applications set the
+<structfield>id</structfield> and <structfield>index</structfield>
+fields of &v4l2-querymenu; and call the
+<constant>VIDIOC_QUERYMENU</constant> ioctl with a pointer to this
+structure. The driver fills the rest of the structure or returns an
+&EINVAL; when the <structfield>id</structfield> or
+<structfield>index</structfield> is invalid. Menu items are enumerated
+by calling <constant>VIDIOC_QUERYMENU</constant> with successive
+<structfield>index</structfield> values from &v4l2-queryctrl;
+<structfield>minimum</structfield> to
+<structfield>maximum</structfield>, inclusive. Note that it is possible
+for <constant>VIDIOC_QUERYMENU</constant> to return an &EINVAL; for some
+indices between <structfield>minimum</structfield> and <structfield>maximum</structfield>.
+In that case that particular menu item is not supported by this driver. Also note that
+the <structfield>minimum</structfield> value is not necessarily 0.</para>
+
+ <para>See also the examples in <xref linkend="control" />.</para>
+
+ <table pgwide="1" frame="none" id="v4l2-queryctrl">
+ <title>struct <structname>v4l2_queryctrl</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>id</structfield></entry>
+ <entry>Identifies the control, set by the application. See
+<xref linkend="control-id" /> for predefined IDs. When the ID is ORed
+with V4L2_CTRL_FLAG_NEXT_CTRL the driver clears the flag and returns
+the first control with a higher ID. Drivers which do not support this
+flag yet always return an &EINVAL;.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>type</structfield></entry>
+ <entry>Type of control, see <xref
+ linkend="v4l2-ctrl-type" />.</entry>
+ </row>
+ <row>
+ <entry>__u8</entry>
+ <entry><structfield>name</structfield>[32]</entry>
+ <entry>Name of the control, a NUL-terminated ASCII
+string. This information is intended for the user.</entry>
+ </row>
+ <row>
+ <entry>__s32</entry>
+ <entry><structfield>minimum</structfield></entry>
+ <entry>Minimum value, inclusive. This field gives a lower
+bound for the control. See &v4l2-ctrl-type; how the minimum value is to
+be used for each possible control type. Note that this a signed 32-bit value.</entry>
+ </row>
+ <row>
+ <entry>__s32</entry>
+ <entry><structfield>maximum</structfield></entry>
+ <entry>Maximum value, inclusive. This field gives an upper
+bound for the control. See &v4l2-ctrl-type; how the maximum value is to
+be used for each possible control type. Note that this a signed 32-bit value.</entry>
+ </row>
+ <row>
+ <entry>__s32</entry>
+ <entry><structfield>step</structfield></entry>
+ <entry><para>This field gives a step size for the control.
+See &v4l2-ctrl-type; how the step value is to be used for each possible
+control type. Note that this an unsigned 32-bit value.
+</para><para>Generally drivers should not scale hardware
+control values. It may be necessary for example when the
+<structfield>name</structfield> or <structfield>id</structfield> imply
+a particular unit and the hardware actually accepts only multiples of
+said unit. If so, drivers must take care values are properly rounded
+when scaling, such that errors will not accumulate on repeated
+read-write cycles.</para><para>This field gives the smallest change of
+an integer control actually affecting hardware. Often the information
+is needed when the user can change controls by keyboard or GUI
+buttons, rather than a slider. When for example a hardware register
+accepts values 0-511 and the driver reports 0-65535, step should be
+128.</para><para>Note that although signed, the step value is supposed to
+be always positive.</para></entry>
+ </row>
+ <row>
+ <entry>__s32</entry>
+ <entry><structfield>default_value</structfield></entry>
+ <entry>The default value of a
+<constant>V4L2_CTRL_TYPE_INTEGER</constant>,
+<constant>_BOOLEAN</constant>, <constant>_BITMASK</constant>,
+<constant>_MENU</constant> or <constant>_INTEGER_MENU</constant> control.
+Not valid for other types of controls.
+Note that drivers reset controls to their default value only when the
+driver is first loaded, never afterwards.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>flags</structfield></entry>
+ <entry>Control flags, see <xref
+ linkend="control-flags" />.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved</structfield>[2]</entry>
+ <entry>Reserved for future extensions. Drivers must set
+the array to zero.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="v4l2-query-ext-ctrl">
+ <title>struct <structname>v4l2_query_ext_ctrl</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>id</structfield></entry>
+ <entry>Identifies the control, set by the application. See
+<xref linkend="control-id" /> for predefined IDs. When the ID is ORed
+with <constant>V4L2_CTRL_FLAG_NEXT_CTRL</constant> the driver clears the
+flag and returns the first non-compound control with a higher ID. When the
+ID is ORed with <constant>V4L2_CTRL_FLAG_NEXT_COMPOUND</constant> the driver
+clears the flag and returns the first compound control with a higher ID.
+Set both to get the first control (compound or not) with a higher ID.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>type</structfield></entry>
+ <entry>Type of control, see <xref
+ linkend="v4l2-ctrl-type" />.</entry>
+ </row>
+ <row>
+ <entry>char</entry>
+ <entry><structfield>name</structfield>[32]</entry>
+ <entry>Name of the control, a NUL-terminated ASCII
+string. This information is intended for the user.</entry>
+ </row>
+ <row>
+ <entry>__s64</entry>
+ <entry><structfield>minimum</structfield></entry>
+ <entry>Minimum value, inclusive. This field gives a lower
+bound for the control. See &v4l2-ctrl-type; how the minimum value is to
+be used for each possible control type. Note that this a signed 64-bit value.</entry>
+ </row>
+ <row>
+ <entry>__s64</entry>
+ <entry><structfield>maximum</structfield></entry>
+ <entry>Maximum value, inclusive. This field gives an upper
+bound for the control. See &v4l2-ctrl-type; how the maximum value is to
+be used for each possible control type. Note that this a signed 64-bit value.</entry>
+ </row>
+ <row>
+ <entry>__u64</entry>
+ <entry><structfield>step</structfield></entry>
+ <entry><para>This field gives a step size for the control.
+See &v4l2-ctrl-type; how the step value is to be used for each possible
+control type. Note that this an unsigned 64-bit value.
+</para><para>Generally drivers should not scale hardware
+control values. It may be necessary for example when the
+<structfield>name</structfield> or <structfield>id</structfield> imply
+a particular unit and the hardware actually accepts only multiples of
+said unit. If so, drivers must take care values are properly rounded
+when scaling, such that errors will not accumulate on repeated
+read-write cycles.</para><para>This field gives the smallest change of
+an integer control actually affecting hardware. Often the information
+is needed when the user can change controls by keyboard or GUI
+buttons, rather than a slider. When for example a hardware register
+accepts values 0-511 and the driver reports 0-65535, step should be
+128.</para></entry>
+ </row>
+ <row>
+ <entry>__s64</entry>
+ <entry><structfield>default_value</structfield></entry>
+ <entry>The default value of a
+<constant>V4L2_CTRL_TYPE_INTEGER</constant>, <constant>_INTEGER64</constant>,
+<constant>_BOOLEAN</constant>, <constant>_BITMASK</constant>,
+<constant>_MENU</constant>, <constant>_INTEGER_MENU</constant>,
+<constant>_U8</constant> or <constant>_U16</constant> control.
+Not valid for other types of controls.
+Note that drivers reset controls to their default value only when the
+driver is first loaded, never afterwards.
+</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>flags</structfield></entry>
+ <entry>Control flags, see <xref
+ linkend="control-flags" />.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>elem_size</structfield></entry>
+ <entry>The size in bytes of a single element of the array.
+Given a char pointer <constant>p</constant> to a 3-dimensional array you can find the
+position of cell <constant>(z, y, x)</constant> as follows:
+<constant>p + ((z * dims[1] + y) * dims[0] + x) * elem_size</constant>. <structfield>elem_size</structfield>
+is always valid, also when the control isn't an array. For string controls
+<structfield>elem_size</structfield> is equal to <structfield>maximum + 1</structfield>.
+</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>elems</structfield></entry>
+ <entry>The number of elements in the N-dimensional array. If this control
+is not an array, then <structfield>elems</structfield> is 1. The <structfield>elems</structfield>
+field can never be 0.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>nr_of_dims</structfield></entry>
+ <entry>The number of dimension in the N-dimensional array. If this control
+is not an array, then this field is 0.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>dims[V4L2_CTRL_MAX_DIMS]</structfield></entry>
+ <entry>The size of each dimension. The first <structfield>nr_of_dims</structfield>
+elements of this array must be non-zero, all remaining elements must be zero.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved</structfield>[32]</entry>
+ <entry>Reserved for future extensions. Applications and drivers
+must set the array to zero.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="v4l2-querymenu">
+ <title>struct <structname>v4l2_querymenu</structname></title>
+ <tgroup cols="4">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry></entry>
+ <entry><structfield>id</structfield></entry>
+ <entry>Identifies the control, set by the application
+from the respective &v4l2-queryctrl;
+<structfield>id</structfield>.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry></entry>
+ <entry><structfield>index</structfield></entry>
+ <entry>Index of the menu item, starting at zero, set by
+ the application.</entry>
+ </row>
+ <row>
+ <entry>union</entry>
+ <entry></entry>
+ <entry></entry>
+ <entry></entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>__u8</entry>
+ <entry><structfield>name</structfield>[32]</entry>
+ <entry>Name of the menu item, a NUL-terminated ASCII
+string. This information is intended for the user. This field is valid
+for <constant>V4L2_CTRL_FLAG_MENU</constant> type controls.</entry>
+ </row>
+ <row>
+ <entry></entry>
+ <entry>__s64</entry>
+ <entry><structfield>value</structfield></entry>
+ <entry>
+ Value of the integer menu item. This field is valid for
+ <constant>V4L2_CTRL_FLAG_INTEGER_MENU</constant> type
+ controls.
+ </entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry></entry>
+ <entry><structfield>reserved</structfield></entry>
+ <entry>Reserved for future extensions. Drivers must set
+the array to zero.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="v4l2-ctrl-type">
+ <title>enum v4l2_ctrl_type</title>
+ <tgroup cols="5" align="left">
+ <colspec colwidth="30*" />
+ <colspec colwidth="5*" align="center" />
+ <colspec colwidth="5*" align="center" />
+ <colspec colwidth="5*" align="center" />
+ <colspec colwidth="55*" />
+ <thead>
+ <row>
+ <entry>Type</entry>
+ <entry><structfield>minimum</structfield></entry>
+ <entry><structfield>step</structfield></entry>
+ <entry><structfield>maximum</structfield></entry>
+ <entry>Description</entry>
+ </row>
+ </thead>
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_CTRL_TYPE_INTEGER</constant></entry>
+ <entry>any</entry>
+ <entry>any</entry>
+ <entry>any</entry>
+ <entry>An integer-valued control ranging from minimum to
+maximum inclusive. The step value indicates the increment between
+values which are actually different on the hardware.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CTRL_TYPE_BOOLEAN</constant></entry>
+ <entry>0</entry>
+ <entry>1</entry>
+ <entry>1</entry>
+ <entry>A boolean-valued control. Zero corresponds to
+"disabled", and one means "enabled".</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CTRL_TYPE_MENU</constant></entry>
+ <entry>&ge; 0</entry>
+ <entry>1</entry>
+ <entry>N-1</entry>
+ <entry>The control has a menu of N choices. The names of
+the menu items can be enumerated with the
+<constant>VIDIOC_QUERYMENU</constant> ioctl.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CTRL_TYPE_INTEGER_MENU</constant></entry>
+ <entry>&ge; 0</entry>
+ <entry>1</entry>
+ <entry>N-1</entry>
+ <entry>
+ The control has a menu of N choices. The values of the
+ menu items can be enumerated with the
+ <constant>VIDIOC_QUERYMENU</constant> ioctl. This is
+ similar to <constant>V4L2_CTRL_TYPE_MENU</constant>
+ except that instead of strings, the menu items are
+ signed 64-bit integers.
+ </entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CTRL_TYPE_BITMASK</constant></entry>
+ <entry>0</entry>
+ <entry>n/a</entry>
+ <entry>any</entry>
+ <entry>A bitmask field. The maximum value is the set of bits that can
+be used, all other bits are to be 0. The maximum value is interpreted as a __u32,
+allowing the use of bit 31 in the bitmask.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CTRL_TYPE_BUTTON</constant></entry>
+ <entry>0</entry>
+ <entry>0</entry>
+ <entry>0</entry>
+ <entry>A control which performs an action when set.
+Drivers must ignore the value passed with
+<constant>VIDIOC_S_CTRL</constant> and return an &EINVAL; on a
+<constant>VIDIOC_G_CTRL</constant> attempt.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CTRL_TYPE_INTEGER64</constant></entry>
+ <entry>any</entry>
+ <entry>any</entry>
+ <entry>any</entry>
+ <entry>A 64-bit integer valued control. Minimum, maximum
+and step size cannot be queried using <constant>VIDIOC_QUERYCTRL</constant>.
+Only <constant>VIDIOC_QUERY_EXT_CTRL</constant> can retrieve the 64-bit
+min/max/step values, they should be interpreted as n/a when using
+<constant>VIDIOC_QUERYCTRL</constant>.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CTRL_TYPE_STRING</constant></entry>
+ <entry>&ge; 0</entry>
+ <entry>&ge; 1</entry>
+ <entry>&ge; 0</entry>
+ <entry>The minimum and maximum string lengths. The step size
+means that the string must be (minimum + N * step) characters long for
+N &ge; 0. These lengths do not include the terminating zero, so in order to
+pass a string of length 8 to &VIDIOC-S-EXT-CTRLS; you need to set the
+<structfield>size</structfield> field of &v4l2-ext-control; to 9. For &VIDIOC-G-EXT-CTRLS; you can
+set the <structfield>size</structfield> field to <structfield>maximum</structfield> + 1.
+Which character encoding is used will depend on the string control itself and
+should be part of the control documentation.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CTRL_TYPE_CTRL_CLASS</constant></entry>
+ <entry>n/a</entry>
+ <entry>n/a</entry>
+ <entry>n/a</entry>
+ <entry>This is not a control. When
+<constant>VIDIOC_QUERYCTRL</constant> is called with a control ID
+equal to a control class code (see <xref linkend="ctrl-class" />) + 1, the
+ioctl returns the name of the control class and this control type.
+Older drivers which do not support this feature return an
+&EINVAL;.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CTRL_TYPE_U8</constant></entry>
+ <entry>any</entry>
+ <entry>any</entry>
+ <entry>any</entry>
+ <entry>An unsigned 8-bit valued control ranging from minimum to
+maximum inclusive. The step value indicates the increment between
+values which are actually different on the hardware.
+</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CTRL_TYPE_U16</constant></entry>
+ <entry>any</entry>
+ <entry>any</entry>
+ <entry>any</entry>
+ <entry>An unsigned 16-bit valued control ranging from minimum to
+maximum inclusive. The step value indicates the increment between
+values which are actually different on the hardware.
+</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="control-flags">
+ <title>Control Flags</title>
+ <tgroup cols="3">
+ &cs-def;
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_CTRL_FLAG_DISABLED</constant></entry>
+ <entry>0x0001</entry>
+ <entry>This control is permanently disabled and should be
+ignored by the application. Any attempt to change the control will
+result in an &EINVAL;.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CTRL_FLAG_GRABBED</constant></entry>
+ <entry>0x0002</entry>
+ <entry>This control is temporarily unchangeable, for
+example because another application took over control of the
+respective resource. Such controls may be displayed specially in a
+user interface. Attempts to change the control may result in an
+&EBUSY;.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CTRL_FLAG_READ_ONLY</constant></entry>
+ <entry>0x0004</entry>
+ <entry>This control is permanently readable only. Any
+attempt to change the control will result in an &EINVAL;.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CTRL_FLAG_UPDATE</constant></entry>
+ <entry>0x0008</entry>
+ <entry>A hint that changing this control may affect the
+value of other controls within the same control class. Applications
+should update their user interface accordingly.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CTRL_FLAG_INACTIVE</constant></entry>
+ <entry>0x0010</entry>
+ <entry>This control is not applicable to the current
+configuration and should be displayed accordingly in a user interface.
+For example the flag may be set on a MPEG audio level 2 bitrate
+control when MPEG audio encoding level 1 was selected with another
+control.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CTRL_FLAG_SLIDER</constant></entry>
+ <entry>0x0020</entry>
+ <entry>A hint that this control is best represented as a
+slider-like element in a user interface.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CTRL_FLAG_WRITE_ONLY</constant></entry>
+ <entry>0x0040</entry>
+ <entry>This control is permanently writable only. Any
+attempt to read the control will result in an &EACCES; error code. This
+flag is typically present for relative controls or action controls where
+writing a value will cause the device to carry out a given action
+(&eg; motor control) but no meaningful value can be returned.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CTRL_FLAG_VOLATILE</constant></entry>
+ <entry>0x0080</entry>
+ <entry>This control is volatile, which means that the value of the control
+changes continuously. A typical example would be the current gain value if the device
+is in auto-gain mode. In such a case the hardware calculates the gain value based on
+the lighting conditions which can change over time. Note that setting a new value for
+a volatile control will have no effect and no <constant>V4L2_EVENT_CTRL_CH_VALUE</constant>
+will be sent, unless the <constant>V4L2_CTRL_FLAG_EXECUTE_ON_WRITE</constant> flag
+(see below) is also set. Otherwise the new value will just be ignored.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CTRL_FLAG_HAS_PAYLOAD</constant></entry>
+ <entry>0x0100</entry>
+ <entry>This control has a pointer type, so its value has to be accessed
+using one of the pointer fields of &v4l2-ext-control;. This flag is set for controls
+that are an array, string, or have a compound type. In all cases you have to set a
+pointer to memory containing the payload of the control.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_CTRL_FLAG_EXECUTE_ON_WRITE</constant></entry>
+ <entry>0x0200</entry>
+ <entry>The value provided to the control will be propagated to the driver
+even if remains constant. This is required when the control represents an action
+on the hardware. For example: clearing an error flag or triggering the flash. All the
+controls of the type <constant>V4L2_CTRL_TYPE_BUTTON</constant> have this flag set.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The &v4l2-queryctrl; <structfield>id</structfield>
+is invalid. The &v4l2-querymenu; <structfield>id</structfield> is
+invalid or <structfield>index</structfield> is out of range (less than
+<structfield>minimum</structfield> or greater than <structfield>maximum</structfield>)
+or this particular menu item is not supported by the driver.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EACCES</errorcode></term>
+ <listitem>
+ <para>An attempt was made to read a write-only control.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-querystd.xml b/Documentation/DocBook/media/v4l/vidioc-querystd.xml
new file mode 100644
index 000000000..222348542
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-querystd.xml
@@ -0,0 +1,75 @@
+<refentry id="vidioc-querystd">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_QUERYSTD</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_QUERYSTD</refname>
+ <refpurpose>Sense the video standard received by the current
+input</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>v4l2_std_id *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_QUERYSTD</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>The hardware may be able to detect the current video
+standard automatically. To do so, applications call <constant>
+VIDIOC_QUERYSTD</constant> with a pointer to a &v4l2-std-id; type. The
+driver stores here a set of candidates, this can be a single flag or a
+set of supported standards if for example the hardware can only
+distinguish between 50 and 60 Hz systems. If no signal was detected,
+then the driver will return V4L2_STD_UNKNOWN. When detection is not
+possible or fails, the set must contain all standards supported by the
+current video input or output.</para>
+
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>ENODATA</errorcode></term>
+ <listitem>
+ <para>Standard video timings are not supported for this input or output.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-reqbufs.xml b/Documentation/DocBook/media/v4l/vidioc-reqbufs.xml
new file mode 100644
index 000000000..78a06a9a5
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-reqbufs.xml
@@ -0,0 +1,137 @@
+<refentry id="vidioc-reqbufs">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_REQBUFS</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_REQBUFS</refname>
+ <refpurpose>Initiate Memory Mapping or User Pointer I/O</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_requestbuffers *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_REQBUFS</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+<para>This ioctl is used to initiate <link linkend="mmap">memory mapped</link>,
+<link linkend="userp">user pointer</link> or <link
+linkend="dmabuf">DMABUF</link> based I/O. Memory mapped buffers are located in
+device memory and must be allocated with this ioctl before they can be mapped
+into the application's address space. User buffers are allocated by
+applications themselves, and this ioctl is merely used to switch the driver
+into user pointer I/O mode and to setup some internal structures.
+Similarly, DMABUF buffers are allocated by applications through a device
+driver, and this ioctl only configures the driver into DMABUF I/O mode without
+performing any direct allocation.</para>
+
+ <para>To allocate device buffers applications initialize all fields of the
+<structname>v4l2_requestbuffers</structname> structure. They set the
+<structfield>type</structfield> field to the respective stream or buffer type,
+the <structfield>count</structfield> field to the desired number of buffers,
+<structfield>memory</structfield> must be set to the requested I/O method and
+the <structfield>reserved</structfield> array must be zeroed. When the ioctl is
+called with a pointer to this structure the driver will attempt to allocate the
+requested number of buffers and it stores the actual number allocated in the
+<structfield>count</structfield> field. It can be smaller than the number
+requested, even zero, when the driver runs out of free memory. A larger number
+is also possible when the driver requires more buffers to function correctly.
+For example video output requires at least two buffers, one displayed and one
+filled by the application.</para>
+ <para>When the I/O method is not supported the ioctl
+returns an &EINVAL;.</para>
+
+ <para>Applications can call <constant>VIDIOC_REQBUFS</constant>
+again to change the number of buffers, however this cannot succeed
+when any buffers are still mapped. A <structfield>count</structfield>
+value of zero frees all buffers, after aborting or finishing any DMA
+in progress, an implicit &VIDIOC-STREAMOFF;. <!-- mhs: I see no
+reason why munmap()ping one or even all buffers must imply
+streamoff.--></para>
+
+ <table pgwide="1" frame="none" id="v4l2-requestbuffers">
+ <title>struct <structname>v4l2_requestbuffers</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>count</structfield></entry>
+ <entry>The number of buffers requested or granted.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>type</structfield></entry>
+ <entry>Type of the stream or buffers, this is the same
+as the &v4l2-format; <structfield>type</structfield> field. See <xref
+ linkend="v4l2-buf-type" /> for valid values.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>memory</structfield></entry>
+ <entry>Applications set this field to
+<constant>V4L2_MEMORY_MMAP</constant>,
+<constant>V4L2_MEMORY_DMABUF</constant> or
+<constant>V4L2_MEMORY_USERPTR</constant>. See <xref linkend="v4l2-memory"
+/>.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved</structfield>[2]</entry>
+ <entry>A place holder for future extensions. This array should
+be zeroed by applications.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The buffer type (<structfield>type</structfield> field) or the
+requested I/O method (<structfield>memory</structfield>) is not
+supported.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-s-hw-freq-seek.xml b/Documentation/DocBook/media/v4l/vidioc-s-hw-freq-seek.xml
new file mode 100644
index 000000000..a5fc4c488
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-s-hw-freq-seek.xml
@@ -0,0 +1,188 @@
+<refentry id="vidioc-s-hw-freq-seek">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_S_HW_FREQ_SEEK</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_S_HW_FREQ_SEEK</refname>
+ <refpurpose>Perform a hardware frequency seek</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_hw_freq_seek
+*<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_S_HW_FREQ_SEEK</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>Start a hardware frequency seek from the current frequency.
+To do this applications initialize the <structfield>tuner</structfield>,
+<structfield>type</structfield>, <structfield>seek_upward</structfield>,
+<structfield>wrap_around</structfield>, <structfield>spacing</structfield>,
+<structfield>rangelow</structfield> and <structfield>rangehigh</structfield>
+fields, and zero out the <structfield>reserved</structfield> array of a
+&v4l2-hw-freq-seek; and call the <constant>VIDIOC_S_HW_FREQ_SEEK</constant>
+ioctl with a pointer to this structure.</para>
+
+ <para>The <structfield>rangelow</structfield> and
+<structfield>rangehigh</structfield> fields can be set to a non-zero value to
+tell the driver to search a specific band. If the &v4l2-tuner;
+<structfield>capability</structfield> field has the
+<constant>V4L2_TUNER_CAP_HWSEEK_PROG_LIM</constant> flag set, these values
+must fall within one of the bands returned by &VIDIOC-ENUM-FREQ-BANDS;. If
+the <constant>V4L2_TUNER_CAP_HWSEEK_PROG_LIM</constant> flag is not set,
+then these values must exactly match those of one of the bands returned by
+&VIDIOC-ENUM-FREQ-BANDS;. If the current frequency of the tuner does not fall
+within the selected band it will be clamped to fit in the band before the
+seek is started.</para>
+
+ <para>If an error is returned, then the original frequency will
+ be restored.</para>
+
+ <para>This ioctl is supported if the <constant>V4L2_CAP_HW_FREQ_SEEK</constant> capability is set.</para>
+
+ <para>If this ioctl is called from a non-blocking filehandle, then &EAGAIN; is
+ returned and no seek takes place.</para>
+
+ <table pgwide="1" frame="none" id="v4l2-hw-freq-seek">
+ <title>struct <structname>v4l2_hw_freq_seek</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>tuner</structfield></entry>
+ <entry>The tuner index number. This is the
+same value as in the &v4l2-input; <structfield>tuner</structfield>
+field and the &v4l2-tuner; <structfield>index</structfield> field.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>type</structfield></entry>
+ <entry>The tuner type. This is the same value as in the
+&v4l2-tuner; <structfield>type</structfield> field. See <xref
+ linkend="v4l2-tuner-type" /></entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>seek_upward</structfield></entry>
+ <entry>If non-zero, seek upward from the current frequency, else seek downward.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>wrap_around</structfield></entry>
+ <entry>If non-zero, wrap around when at the end of the frequency range, else stop seeking.
+ The &v4l2-tuner; <structfield>capability</structfield> field will tell you what the
+ hardware supports.
+ </entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>spacing</structfield></entry>
+ <entry>If non-zero, defines the hardware seek resolution in Hz. The driver selects the nearest value that is supported by the device. If spacing is zero a reasonable default value is used.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>rangelow</structfield></entry>
+ <entry>If non-zero, the lowest tunable frequency of the band to
+search in units of 62.5 kHz, or if the &v4l2-tuner;
+<structfield>capability</structfield> field has the
+<constant>V4L2_TUNER_CAP_LOW</constant> flag set, in units of 62.5 Hz or if the &v4l2-tuner;
+<structfield>capability</structfield> field has the
+<constant>V4L2_TUNER_CAP_1HZ</constant> flag set, in units of 1 Hz.
+If <structfield>rangelow</structfield> is zero a reasonable default value
+is used.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>rangehigh</structfield></entry>
+ <entry>If non-zero, the highest tunable frequency of the band to
+search in units of 62.5 kHz, or if the &v4l2-tuner;
+<structfield>capability</structfield> field has the
+<constant>V4L2_TUNER_CAP_LOW</constant> flag set, in units of 62.5 Hz or if the &v4l2-tuner;
+<structfield>capability</structfield> field has the
+<constant>V4L2_TUNER_CAP_1HZ</constant> flag set, in units of 1 Hz.
+If <structfield>rangehigh</structfield> is zero a reasonable default value
+is used.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved</structfield>[5]</entry>
+ <entry>Reserved for future extensions. Applications
+ must set the array to zero.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The <structfield>tuner</structfield> index is out of
+bounds, the <structfield>wrap_around</structfield> value is not supported or
+one of the values in the <structfield>type</structfield>,
+<structfield>rangelow</structfield> or <structfield>rangehigh</structfield>
+fields is wrong.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EAGAIN</errorcode></term>
+ <listitem>
+ <para>Attempted to call <constant>VIDIOC_S_HW_FREQ_SEEK</constant>
+ with the filehandle in non-blocking mode.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>ENODATA</errorcode></term>
+ <listitem>
+ <para>The hardware seek found no channels.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EBUSY</errorcode></term>
+ <listitem>
+ <para>Another hardware seek is already in progress.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-streamon.xml b/Documentation/DocBook/media/v4l/vidioc-streamon.xml
new file mode 100644
index 000000000..df2c63d07
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-streamon.xml
@@ -0,0 +1,128 @@
+<refentry id="vidioc-streamon">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_STREAMON, VIDIOC_STREAMOFF</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_STREAMON</refname>
+ <refname>VIDIOC_STREAMOFF</refname>
+ <refpurpose>Start or stop streaming I/O</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>const int *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_STREAMON, VIDIOC_STREAMOFF</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>The <constant>VIDIOC_STREAMON</constant> and
+<constant>VIDIOC_STREAMOFF</constant> ioctl start and stop the capture
+or output process during streaming (<link linkend="mmap">memory
+mapping</link>, <link linkend="userp">user pointer</link> or
+<link linkend="dmabuf">DMABUF</link>) I/O.</para>
+
+ <para>Capture hardware is disabled and no input
+buffers are filled (if there are any empty buffers in the incoming
+queue) until <constant>VIDIOC_STREAMON</constant> has been called.
+Output hardware is disabled and no video signal is
+produced until <constant>VIDIOC_STREAMON</constant> has been called.
+The ioctl will succeed when at least one output buffer is in the
+incoming queue.</para>
+
+ <para>Memory-to-memory devices will not start until
+<constant>VIDIOC_STREAMON</constant> has been called for both the capture
+and output stream types.</para>
+
+ <para>If <constant>VIDIOC_STREAMON</constant> fails then any already
+queued buffers will remain queued.</para>
+
+ <para>The <constant>VIDIOC_STREAMOFF</constant> ioctl, apart of
+aborting or finishing any DMA in progress, unlocks any user pointer
+buffers locked in physical memory, and it removes all buffers from the
+incoming and outgoing queues. That means all images captured but not
+dequeued yet will be lost, likewise all images enqueued for output but
+not transmitted yet. I/O returns to the same state as after calling
+&VIDIOC-REQBUFS; and can be restarted accordingly.</para>
+
+ <para>If buffers have been queued with &VIDIOC-QBUF; and
+<constant>VIDIOC_STREAMOFF</constant> is called without ever having
+called <constant>VIDIOC_STREAMON</constant>, then those queued buffers
+will also be removed from the incoming queue and all are returned to the
+same state as after calling &VIDIOC-REQBUFS; and can be restarted
+accordingly.</para>
+
+ <para>Both ioctls take a pointer to an integer, the desired buffer or
+stream type. This is the same as &v4l2-requestbuffers;
+<structfield>type</structfield>.</para>
+
+ <para>If <constant>VIDIOC_STREAMON</constant> is called when streaming
+is already in progress, or if <constant>VIDIOC_STREAMOFF</constant> is called
+when streaming is already stopped, then 0 is returned. Nothing happens in the
+case of <constant>VIDIOC_STREAMON</constant>, but <constant>VIDIOC_STREAMOFF</constant>
+will return queued buffers to their starting state as mentioned above.</para>
+
+ <para>Note that applications can be preempted for unknown periods right
+before or after the <constant>VIDIOC_STREAMON</constant> or
+<constant>VIDIOC_STREAMOFF</constant> calls, there is no notion of
+starting or stopping "now". Buffer timestamps can be used to
+synchronize with other events.</para>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The buffer <structfield>type</structfield> is not supported,
+ or no buffers have been allocated (memory mapping) or enqueued
+ (output) yet.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EPIPE</errorcode></term>
+ <listitem>
+ <para>The driver implements <link
+ linkend="pad-level-formats">pad-level format configuration</link> and
+ the pipeline configuration is invalid.
+ </para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-subdev-enum-frame-interval.xml b/Documentation/DocBook/media/v4l/vidioc-subdev-enum-frame-interval.xml
new file mode 100644
index 000000000..cff59f5cb
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-subdev-enum-frame-interval.xml
@@ -0,0 +1,157 @@
+<refentry id="vidioc-subdev-enum-frame-interval">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL</refname>
+ <refpurpose>Enumerate frame intervals</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_subdev_frame_interval_enum *
+ <parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <note>
+ <title>Experimental</title>
+ <para>This is an <link linkend="experimental">experimental</link>
+ interface and may change in the future.</para>
+ </note>
+
+ <para>This ioctl lets applications enumerate available frame intervals on a
+ given sub-device pad. Frame intervals only makes sense for sub-devices that
+ can control the frame period on their own. This includes, for instance,
+ image sensors and TV tuners.</para>
+
+ <para>For the common use case of image sensors, the frame intervals
+ available on the sub-device output pad depend on the frame format and size
+ on the same pad. Applications must thus specify the desired format and size
+ when enumerating frame intervals.</para>
+
+ <para>To enumerate frame intervals applications initialize the
+ <structfield>index</structfield>, <structfield>pad</structfield>,
+ <structfield>which</structfield>, <structfield>code</structfield>,
+ <structfield>width</structfield> and <structfield>height</structfield>
+ fields of &v4l2-subdev-frame-interval-enum; and call the
+ <constant>VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL</constant> ioctl with a pointer
+ to this structure. Drivers fill the rest of the structure or return
+ an &EINVAL; if one of the input fields is invalid. All frame intervals are
+ enumerable by beginning at index zero and incrementing by one until
+ <errorcode>EINVAL</errorcode> is returned.</para>
+
+ <para>Available frame intervals may depend on the current 'try' formats
+ at other pads of the sub-device, as well as on the current active links. See
+ &VIDIOC-SUBDEV-G-FMT; for more information about the try formats.</para>
+
+ <para>Sub-devices that support the frame interval enumeration ioctl should
+ implemented it on a single pad only. Its behaviour when supported on
+ multiple pads of the same sub-device is not defined.</para>
+
+ <table pgwide="1" frame="none" id="v4l2-subdev-frame-interval-enum">
+ <title>struct <structname>v4l2_subdev_frame_interval_enum</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>index</structfield></entry>
+ <entry>Number of the format in the enumeration, set by the
+ application.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>pad</structfield></entry>
+ <entry>Pad number as reported by the media controller API.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>code</structfield></entry>
+ <entry>The media bus format code, as defined in
+ <xref linkend="v4l2-mbus-format" />.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>width</structfield></entry>
+ <entry>Frame width, in pixels.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>height</structfield></entry>
+ <entry>Frame height, in pixels.</entry>
+ </row>
+ <row>
+ <entry>&v4l2-fract;</entry>
+ <entry><structfield>interval</structfield></entry>
+ <entry>Period, in seconds, between consecutive video frames.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>which</structfield></entry>
+ <entry>Frame intervals to be enumerated, from &v4l2-subdev-format-whence;.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved</structfield>[8]</entry>
+ <entry>Reserved for future extensions. Applications and drivers must
+ set the array to zero.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The &v4l2-subdev-frame-interval-enum;
+ <structfield>pad</structfield> references a non-existing pad, one of
+ the <structfield>code</structfield>, <structfield>width</structfield>
+ or <structfield>height</structfield> fields are invalid for the given
+ pad or the <structfield>index</structfield> field is out of bounds.
+ </para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-subdev-enum-frame-size.xml b/Documentation/DocBook/media/v4l/vidioc-subdev-enum-frame-size.xml
new file mode 100644
index 000000000..abd545ede
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-subdev-enum-frame-size.xml
@@ -0,0 +1,159 @@
+<refentry id="vidioc-subdev-enum-frame-size">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_SUBDEV_ENUM_FRAME_SIZE</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_SUBDEV_ENUM_FRAME_SIZE</refname>
+ <refpurpose>Enumerate media bus frame sizes</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_subdev_frame_size_enum *
+ <parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_SUBDEV_ENUM_FRAME_SIZE</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <note>
+ <title>Experimental</title>
+ <para>This is an <link linkend="experimental">experimental</link>
+ interface and may change in the future.</para>
+ </note>
+
+ <para>This ioctl allows applications to enumerate all frame sizes
+ supported by a sub-device on the given pad for the given media bus format.
+ Supported formats can be retrieved with the &VIDIOC-SUBDEV-ENUM-MBUS-CODE;
+ ioctl.</para>
+
+ <para>To enumerate frame sizes applications initialize the
+ <structfield>pad</structfield>, <structfield>which</structfield> ,
+ <structfield>code</structfield> and <structfield>index</structfield>
+ fields of the &v4l2-subdev-mbus-code-enum; and call the
+ <constant>VIDIOC_SUBDEV_ENUM_FRAME_SIZE</constant> ioctl with a pointer to
+ the structure. Drivers fill the minimum and maximum frame sizes or return
+ an &EINVAL; if one of the input parameters is invalid.</para>
+
+ <para>Sub-devices that only support discrete frame sizes (such as most
+ sensors) will return one or more frame sizes with identical minimum and
+ maximum values.</para>
+
+ <para>Not all possible sizes in given [minimum, maximum] ranges need to be
+ supported. For instance, a scaler that uses a fixed-point scaling ratio
+ might not be able to produce every frame size between the minimum and
+ maximum values. Applications must use the &VIDIOC-SUBDEV-S-FMT; ioctl to
+ try the sub-device for an exact supported frame size.</para>
+
+ <para>Available frame sizes may depend on the current 'try' formats at other
+ pads of the sub-device, as well as on the current active links and the
+ current values of V4L2 controls. See &VIDIOC-SUBDEV-G-FMT; for more
+ information about try formats.</para>
+
+ <table pgwide="1" frame="none" id="v4l2-subdev-frame-size-enum">
+ <title>struct <structname>v4l2_subdev_frame_size_enum</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>index</structfield></entry>
+ <entry>Number of the format in the enumeration, set by the
+ application.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>pad</structfield></entry>
+ <entry>Pad number as reported by the media controller API.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>code</structfield></entry>
+ <entry>The media bus format code, as defined in
+ <xref linkend="v4l2-mbus-format" />.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>min_width</structfield></entry>
+ <entry>Minimum frame width, in pixels.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>max_width</structfield></entry>
+ <entry>Maximum frame width, in pixels.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>min_height</structfield></entry>
+ <entry>Minimum frame height, in pixels.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>max_height</structfield></entry>
+ <entry>Maximum frame height, in pixels.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>which</structfield></entry>
+ <entry>Frame sizes to be enumerated, from &v4l2-subdev-format-whence;.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved</structfield>[8]</entry>
+ <entry>Reserved for future extensions. Applications and drivers must
+ set the array to zero.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The &v4l2-subdev-frame-size-enum; <structfield>pad</structfield>
+ references a non-existing pad, the <structfield>code</structfield> is
+ invalid for the given pad or the <structfield>index</structfield>
+ field is out of bounds.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-subdev-enum-mbus-code.xml b/Documentation/DocBook/media/v4l/vidioc-subdev-enum-mbus-code.xml
new file mode 100644
index 000000000..0bcb278fd
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-subdev-enum-mbus-code.xml
@@ -0,0 +1,124 @@
+<refentry id="vidioc-subdev-enum-mbus-code">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_SUBDEV_ENUM_MBUS_CODE</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_SUBDEV_ENUM_MBUS_CODE</refname>
+ <refpurpose>Enumerate media bus formats</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_subdev_mbus_code_enum *
+ <parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_SUBDEV_ENUM_MBUS_CODE</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <note>
+ <title>Experimental</title>
+ <para>This is an <link linkend="experimental">experimental</link>
+ interface and may change in the future.</para>
+ </note>
+
+ <para>To enumerate media bus formats available at a given sub-device pad
+ applications initialize the <structfield>pad</structfield>, <structfield>which</structfield>
+ and <structfield>index</structfield> fields of &v4l2-subdev-mbus-code-enum; and
+ call the <constant>VIDIOC_SUBDEV_ENUM_MBUS_CODE</constant> ioctl with a
+ pointer to this structure. Drivers fill the rest of the structure or return
+ an &EINVAL; if either the <structfield>pad</structfield> or
+ <structfield>index</structfield> are invalid. All media bus formats are
+ enumerable by beginning at index zero and incrementing by one until
+ <errorcode>EINVAL</errorcode> is returned.</para>
+
+ <para>Available media bus formats may depend on the current 'try' formats
+ at other pads of the sub-device, as well as on the current active links. See
+ &VIDIOC-SUBDEV-G-FMT; for more information about the try formats.</para>
+
+ <table pgwide="1" frame="none" id="v4l2-subdev-mbus-code-enum">
+ <title>struct <structname>v4l2_subdev_mbus_code_enum</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>pad</structfield></entry>
+ <entry>Pad number as reported by the media controller API.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>index</structfield></entry>
+ <entry>Number of the format in the enumeration, set by the
+ application.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>code</structfield></entry>
+ <entry>The media bus format code, as defined in
+ <xref linkend="v4l2-mbus-format" />.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>which</structfield></entry>
+ <entry>Media bus format codes to be enumerated, from &v4l2-subdev-format-whence;.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved</structfield>[8]</entry>
+ <entry>Reserved for future extensions. Applications and drivers must
+ set the array to zero.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The &v4l2-subdev-mbus-code-enum; <structfield>pad</structfield>
+ references a non-existing pad, or the <structfield>index</structfield>
+ field is out of bounds.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-subdev-g-crop.xml b/Documentation/DocBook/media/v4l/vidioc-subdev-g-crop.xml
new file mode 100644
index 000000000..4cddd788c
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-subdev-g-crop.xml
@@ -0,0 +1,158 @@
+<refentry id="vidioc-subdev-g-crop">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_SUBDEV_G_CROP, VIDIOC_SUBDEV_S_CROP</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_SUBDEV_G_CROP</refname>
+ <refname>VIDIOC_SUBDEV_S_CROP</refname>
+ <refpurpose>Get or set the crop rectangle on a subdev pad</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_subdev_crop *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>const struct v4l2_subdev_crop *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_SUBDEV_G_CROP, VIDIOC_SUBDEV_S_CROP</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <note>
+ <title>Obsolete</title>
+
+ <para>This is an <link linkend="obsolete">obsolete</link>
+ interface and may be removed in the future. It is superseded by
+ <link linkend="vidioc-subdev-g-selection">the selection
+ API</link>.</para>
+ </note>
+
+ <para>To retrieve the current crop rectangle applications set the
+ <structfield>pad</structfield> field of a &v4l2-subdev-crop; to the
+ desired pad number as reported by the media API and the
+ <structfield>which</structfield> field to
+ <constant>V4L2_SUBDEV_FORMAT_ACTIVE</constant>. They then call the
+ <constant>VIDIOC_SUBDEV_G_CROP</constant> ioctl with a pointer to this
+ structure. The driver fills the members of the <structfield>rect</structfield>
+ field or returns &EINVAL; if the input arguments are invalid, or if cropping
+ is not supported on the given pad.</para>
+
+ <para>To change the current crop rectangle applications set both the
+ <structfield>pad</structfield> and <structfield>which</structfield> fields
+ and all members of the <structfield>rect</structfield> field. They then call
+ the <constant>VIDIOC_SUBDEV_S_CROP</constant> ioctl with a pointer to this
+ structure. The driver verifies the requested crop rectangle, adjusts it
+ based on the hardware capabilities and configures the device. Upon return
+ the &v4l2-subdev-crop; contains the current format as would be returned
+ by a <constant>VIDIOC_SUBDEV_G_CROP</constant> call.</para>
+
+ <para>Applications can query the device capabilities by setting the
+ <structfield>which</structfield> to
+ <constant>V4L2_SUBDEV_FORMAT_TRY</constant>. When set, 'try' crop
+ rectangles are not applied to the device by the driver, but are mangled
+ exactly as active crop rectangles and stored in the sub-device file handle.
+ Two applications querying the same sub-device would thus not interact with
+ each other.</para>
+
+ <para>Drivers must not return an error solely because the requested crop
+ rectangle doesn't match the device capabilities. They must instead modify
+ the rectangle to match what the hardware can provide. The modified format
+ should be as close as possible to the original request.</para>
+
+ <table pgwide="1" frame="none" id="v4l2-subdev-crop">
+ <title>struct <structname>v4l2_subdev_crop</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>pad</structfield></entry>
+ <entry>Pad number as reported by the media framework.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>which</structfield></entry>
+ <entry>Crop rectangle to get or set, from
+ &v4l2-subdev-format-whence;.</entry>
+ </row>
+ <row>
+ <entry>&v4l2-rect;</entry>
+ <entry><structfield>rect</structfield></entry>
+ <entry>Crop rectangle boundaries, in pixels.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved</structfield>[8]</entry>
+ <entry>Reserved for future extensions. Applications and drivers must
+ set the array to zero.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EBUSY</errorcode></term>
+ <listitem>
+ <para>The crop rectangle can't be changed because the pad is currently
+ busy. This can be caused, for instance, by an active video stream on
+ the pad. The ioctl must not be retried without performing another
+ action to fix the problem first. Only returned by
+ <constant>VIDIOC_SUBDEV_S_CROP</constant></para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The &v4l2-subdev-crop; <structfield>pad</structfield>
+ references a non-existing pad, the <structfield>which</structfield>
+ field references a non-existing format, or cropping is not supported
+ on the given subdev pad.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-subdev-g-fmt.xml b/Documentation/DocBook/media/v4l/vidioc-subdev-g-fmt.xml
new file mode 100644
index 000000000..a67cde6f8
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-subdev-g-fmt.xml
@@ -0,0 +1,183 @@
+<refentry id="vidioc-subdev-g-fmt">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_SUBDEV_G_FMT, VIDIOC_SUBDEV_S_FMT</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_SUBDEV_G_FMT</refname>
+ <refname>VIDIOC_SUBDEV_S_FMT</refname>
+ <refpurpose>Get or set the data format on a subdev pad</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_subdev_format *<parameter>argp</parameter>
+ </paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_SUBDEV_G_FMT, VIDIOC_SUBDEV_S_FMT</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <note>
+ <title>Experimental</title>
+ <para>This is an <link linkend="experimental">experimental</link>
+ interface and may change in the future.</para>
+ </note>
+
+ <para>These ioctls are used to negotiate the frame format at specific
+ subdev pads in the image pipeline.</para>
+
+ <para>To retrieve the current format applications set the
+ <structfield>pad</structfield> field of a &v4l2-subdev-format; to the
+ desired pad number as reported by the media API and the
+ <structfield>which</structfield> field to
+ <constant>V4L2_SUBDEV_FORMAT_ACTIVE</constant>. When they call the
+ <constant>VIDIOC_SUBDEV_G_FMT</constant> ioctl with a pointer to this
+ structure the driver fills the members of the <structfield>format</structfield>
+ field.</para>
+
+ <para>To change the current format applications set both the
+ <structfield>pad</structfield> and <structfield>which</structfield> fields
+ and all members of the <structfield>format</structfield> field. When they
+ call the <constant>VIDIOC_SUBDEV_S_FMT</constant> ioctl with a pointer to this
+ structure the driver verifies the requested format, adjusts it based on the
+ hardware capabilities and configures the device. Upon return the
+ &v4l2-subdev-format; contains the current format as would be returned by a
+ <constant>VIDIOC_SUBDEV_G_FMT</constant> call.</para>
+
+ <para>Applications can query the device capabilities by setting the
+ <structfield>which</structfield> to
+ <constant>V4L2_SUBDEV_FORMAT_TRY</constant>. When set, 'try' formats are not
+ applied to the device by the driver, but are changed exactly as active
+ formats and stored in the sub-device file handle. Two applications querying
+ the same sub-device would thus not interact with each other.</para>
+
+ <para>For instance, to try a format at the output pad of a sub-device,
+ applications would first set the try format at the sub-device input with the
+ <constant>VIDIOC_SUBDEV_S_FMT</constant> ioctl. They would then either
+ retrieve the default format at the output pad with the
+ <constant>VIDIOC_SUBDEV_G_FMT</constant> ioctl, or set the desired output
+ pad format with the <constant>VIDIOC_SUBDEV_S_FMT</constant> ioctl and check
+ the returned value.</para>
+
+ <para>Try formats do not depend on active formats, but can depend on the
+ current links configuration or sub-device controls value. For instance, a
+ low-pass noise filter might crop pixels at the frame boundaries, modifying
+ its output frame size.</para>
+
+ <para>Drivers must not return an error solely because the requested format
+ doesn't match the device capabilities. They must instead modify the format
+ to match what the hardware can provide. The modified format should be as
+ close as possible to the original request.</para>
+
+ <table pgwide="1" frame="none" id="v4l2-subdev-format">
+ <title>struct <structname>v4l2_subdev_format</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>pad</structfield></entry>
+ <entry>Pad number as reported by the media controller API.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>which</structfield></entry>
+ <entry>Format to modified, from &v4l2-subdev-format-whence;.</entry>
+ </row>
+ <row>
+ <entry>&v4l2-mbus-framefmt;</entry>
+ <entry><structfield>format</structfield></entry>
+ <entry>Definition of an image format, see <xref
+ linkend="v4l2-mbus-framefmt" /> for details.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved</structfield>[8]</entry>
+ <entry>Reserved for future extensions. Applications and drivers must
+ set the array to zero.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="v4l2-subdev-format-whence">
+ <title>enum <structname>v4l2_subdev_format_whence</structname></title>
+ <tgroup cols="3">
+ &cs-def;
+ <tbody valign="top">
+ <row>
+ <entry>V4L2_SUBDEV_FORMAT_TRY</entry>
+ <entry>0</entry>
+ <entry>Try formats, used for querying device capabilities.</entry>
+ </row>
+ <row>
+ <entry>V4L2_SUBDEV_FORMAT_ACTIVE</entry>
+ <entry>1</entry>
+ <entry>Active formats, applied to the hardware.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EBUSY</errorcode></term>
+ <listitem>
+ <para>The format can't be changed because the pad is currently busy.
+ This can be caused, for instance, by an active video stream on the
+ pad. The ioctl must not be retried without performing another action
+ to fix the problem first. Only returned by
+ <constant>VIDIOC_SUBDEV_S_FMT</constant></para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The &v4l2-subdev-format; <structfield>pad</structfield>
+ references a non-existing pad, or the <structfield>which</structfield>
+ field references a non-existing format.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+ <refsect1>
+ &return-value;
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-subdev-g-frame-interval.xml b/Documentation/DocBook/media/v4l/vidioc-subdev-g-frame-interval.xml
new file mode 100644
index 000000000..0bc3ea22d
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-subdev-g-frame-interval.xml
@@ -0,0 +1,141 @@
+<refentry id="vidioc-subdev-g-frame-interval">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_SUBDEV_G_FRAME_INTERVAL, VIDIOC_SUBDEV_S_FRAME_INTERVAL</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_SUBDEV_G_FRAME_INTERVAL</refname>
+ <refname>VIDIOC_SUBDEV_S_FRAME_INTERVAL</refname>
+ <refpurpose>Get or set the frame interval on a subdev pad</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_subdev_frame_interval *<parameter>argp</parameter>
+ </paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_SUBDEV_G_FRAME_INTERVAL, VIDIOC_SUBDEV_S_FRAME_INTERVAL</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <note>
+ <title>Experimental</title>
+ <para>This is an <link linkend="experimental">experimental</link>
+ interface and may change in the future.</para>
+ </note>
+
+ <para>These ioctls are used to get and set the frame interval at specific
+ subdev pads in the image pipeline. The frame interval only makes sense for
+ sub-devices that can control the frame period on their own. This includes,
+ for instance, image sensors and TV tuners. Sub-devices that don't support
+ frame intervals must not implement these ioctls.</para>
+
+ <para>To retrieve the current frame interval applications set the
+ <structfield>pad</structfield> field of a &v4l2-subdev-frame-interval; to
+ the desired pad number as reported by the media controller API. When they
+ call the <constant>VIDIOC_SUBDEV_G_FRAME_INTERVAL</constant> ioctl with a
+ pointer to this structure the driver fills the members of the
+ <structfield>interval</structfield> field.</para>
+
+ <para>To change the current frame interval applications set both the
+ <structfield>pad</structfield> field and all members of the
+ <structfield>interval</structfield> field. When they call the
+ <constant>VIDIOC_SUBDEV_S_FRAME_INTERVAL</constant> ioctl with a pointer to
+ this structure the driver verifies the requested interval, adjusts it based
+ on the hardware capabilities and configures the device. Upon return the
+ &v4l2-subdev-frame-interval; contains the current frame interval as would be
+ returned by a <constant>VIDIOC_SUBDEV_G_FRAME_INTERVAL</constant> call.
+ </para>
+
+ <para>Drivers must not return an error solely because the requested interval
+ doesn't match the device capabilities. They must instead modify the interval
+ to match what the hardware can provide. The modified interval should be as
+ close as possible to the original request.</para>
+
+ <para>Sub-devices that support the frame interval ioctls should implement
+ them on a single pad only. Their behaviour when supported on multiple pads
+ of the same sub-device is not defined.</para>
+
+ <table pgwide="1" frame="none" id="v4l2-subdev-frame-interval">
+ <title>struct <structname>v4l2_subdev_frame_interval</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>pad</structfield></entry>
+ <entry>Pad number as reported by the media controller API.</entry>
+ </row>
+ <row>
+ <entry>&v4l2-fract;</entry>
+ <entry><structfield>interval</structfield></entry>
+ <entry>Period, in seconds, between consecutive video frames.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved</structfield>[9]</entry>
+ <entry>Reserved for future extensions. Applications and drivers must
+ set the array to zero.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EBUSY</errorcode></term>
+ <listitem>
+ <para>The frame interval can't be changed because the pad is currently
+ busy. This can be caused, for instance, by an active video stream on
+ the pad. The ioctl must not be retried without performing another
+ action to fix the problem first. Only returned by
+ <constant>VIDIOC_SUBDEV_S_FRAME_INTERVAL</constant></para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The &v4l2-subdev-frame-interval; <structfield>pad</structfield>
+ references a non-existing pad, or the pad doesn't support frame
+ intervals.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-subdev-g-selection.xml b/Documentation/DocBook/media/v4l/vidioc-subdev-g-selection.xml
new file mode 100644
index 000000000..c62a73607
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-subdev-g-selection.xml
@@ -0,0 +1,165 @@
+<refentry id="vidioc-subdev-g-selection">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_SUBDEV_G_SELECTION, VIDIOC_SUBDEV_S_SELECTION</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_SUBDEV_G_SELECTION</refname>
+ <refname>VIDIOC_SUBDEV_S_SELECTION</refname>
+ <refpurpose>Get or set selection rectangles on a subdev pad</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_subdev_selection *<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_SUBDEV_G_SELECTION, VIDIOC_SUBDEV_S_SELECTION</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <note>
+ <title>Experimental</title>
+ <para>This is an <link linkend="experimental">experimental</link>
+ interface and may change in the future.</para>
+ </note>
+
+ <para>The selections are used to configure various image
+ processing functionality performed by the subdevs which affect the
+ image size. This currently includes cropping, scaling and
+ composition.</para>
+
+ <para>The selection API replaces <link
+ linkend="vidioc-subdev-g-crop">the old subdev crop API</link>. All
+ the function of the crop API, and more, are supported by the
+ selections API.</para>
+
+ <para>See <xref linkend="subdev"></xref> for
+ more information on how each selection target affects the image
+ processing pipeline inside the subdevice.</para>
+
+ <refsect2>
+ <title>Types of selection targets</title>
+
+ <para>There are two types of selection targets: actual and bounds. The
+ actual targets are the targets which configure the hardware. The BOUNDS
+ target will return a rectangle that contain all possible actual
+ rectangles.</para>
+ </refsect2>
+
+ <refsect2>
+ <title>Discovering supported features</title>
+
+ <para>To discover which targets are supported, the user can
+ perform <constant>VIDIOC_SUBDEV_G_SELECTION</constant> on them.
+ Any unsupported target will return
+ <constant>EINVAL</constant>.</para>
+
+ <para>Selection targets and flags are documented in <xref
+ linkend="v4l2-selections-common"/>.</para>
+
+ <table pgwide="1" frame="none" id="v4l2-subdev-selection">
+ <title>struct <structname>v4l2_subdev_selection</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>which</structfield></entry>
+ <entry>Active or try selection, from
+ &v4l2-subdev-format-whence;.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>pad</structfield></entry>
+ <entry>Pad number as reported by the media framework.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>target</structfield></entry>
+ <entry>Target selection rectangle. See
+ <xref linkend="v4l2-selections-common" />.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>flags</structfield></entry>
+ <entry>Flags. See
+ <xref linkend="v4l2-selection-flags" />.</entry>
+ </row>
+ <row>
+ <entry>&v4l2-rect;</entry>
+ <entry><structfield>r</structfield></entry>
+ <entry>Selection rectangle, in pixels.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved</structfield>[8]</entry>
+ <entry>Reserved for future extensions. Applications and drivers must
+ set the array to zero.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ </refsect2>
+
+ </refsect1>
+
+ <refsect1>
+ &return-value;
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EBUSY</errorcode></term>
+ <listitem>
+ <para>The selection rectangle can't be changed because the
+ pad is currently busy. This can be caused, for instance, by
+ an active video stream on the pad. The ioctl must not be
+ retried without performing another action to fix the problem
+ first. Only returned by
+ <constant>VIDIOC_SUBDEV_S_SELECTION</constant></para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EINVAL</errorcode></term>
+ <listitem>
+ <para>The &v4l2-subdev-selection;
+ <structfield>pad</structfield> references a non-existing
+ pad, the <structfield>which</structfield> field references a
+ non-existing format, or the selection target is not
+ supported on the given subdev pad.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
diff --git a/Documentation/DocBook/media/v4l/vidioc-subscribe-event.xml b/Documentation/DocBook/media/v4l/vidioc-subscribe-event.xml
new file mode 100644
index 000000000..d0332f610
--- /dev/null
+++ b/Documentation/DocBook/media/v4l/vidioc-subscribe-event.xml
@@ -0,0 +1,129 @@
+<refentry id="vidioc-subscribe-event">
+ <refmeta>
+ <refentrytitle>ioctl VIDIOC_SUBSCRIBE_EVENT, VIDIOC_UNSUBSCRIBE_EVENT</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>VIDIOC_SUBSCRIBE_EVENT, VIDIOC_UNSUBSCRIBE_EVENT</refname>
+ <refpurpose>Subscribe or unsubscribe event</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>int <function>ioctl</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ <paramdef>int <parameter>request</parameter></paramdef>
+ <paramdef>struct v4l2_event_subscription
+*<parameter>argp</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>request</parameter></term>
+ <listitem>
+ <para>VIDIOC_SUBSCRIBE_EVENT, VIDIOC_UNSUBSCRIBE_EVENT</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>argp</parameter></term>
+ <listitem>
+ <para></para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>Subscribe or unsubscribe V4L2 event. Subscribed events are
+ dequeued by using the &VIDIOC-DQEVENT; ioctl.</para>
+
+ <table frame="none" pgwide="1" id="v4l2-event-subscription">
+ <title>struct <structname>v4l2_event_subscription</structname></title>
+ <tgroup cols="3">
+ &cs-str;
+ <tbody valign="top">
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>type</structfield></entry>
+ <entry>Type of the event, see <xref linkend="event-type" />. Note that
+<constant>V4L2_EVENT_ALL</constant> can be used with VIDIOC_UNSUBSCRIBE_EVENT
+for unsubscribing all events at once.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>id</structfield></entry>
+ <entry>ID of the event source. If there is no ID associated with
+ the event source, then set this to 0. Whether or not an event
+ needs an ID depends on the event type.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>flags</structfield></entry>
+ <entry>Event flags, see <xref linkend="event-flags" />.</entry>
+ </row>
+ <row>
+ <entry>__u32</entry>
+ <entry><structfield>reserved</structfield>[5]</entry>
+ <entry>Reserved for future extensions. Drivers and applications
+ must set the array to zero.</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <table pgwide="1" frame="none" id="event-flags">
+ <title>Event Flags</title>
+ <tgroup cols="3">
+ &cs-def;
+ <tbody valign="top">
+ <row>
+ <entry><constant>V4L2_EVENT_SUB_FL_SEND_INITIAL</constant></entry>
+ <entry>0x0001</entry>
+ <entry>When this event is subscribed an initial event will be sent
+ containing the current status. This only makes sense for events
+ that are triggered by a status change such as <constant>V4L2_EVENT_CTRL</constant>.
+ Other events will ignore this flag.</entry>
+ </row>
+ <row>
+ <entry><constant>V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK</constant></entry>
+ <entry>0x0002</entry>
+ <entry><para>If set, then events directly caused by an ioctl will also be sent to
+ the filehandle that called that ioctl. For example, changing a control using
+ &VIDIOC-S-CTRL; will cause a V4L2_EVENT_CTRL to be sent back to that same
+ filehandle. Normally such events are suppressed to prevent feedback loops
+ where an application changes a control to a one value and then another, and
+ then receives an event telling it that that control has changed to the first
+ value.</para>
+
+ <para>Since it can't tell whether that event was caused by another application
+ or by the &VIDIOC-S-CTRL; call it is hard to decide whether to set the
+ control to the value in the event, or ignore it.</para>
+
+ <para>Think carefully when you set this flag so you won't get into situations
+ like that.</para>
+ </entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ </refsect1>
+ <refsect1>
+ &return-value;
+ </refsect1>
+</refentry>