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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
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+cx8800 release notes
+====================
+
+This is a v4l2 device driver for the cx2388x chip.
+
+
+current status
+==============
+
+video
+ - Basically works.
+ - For now, only capture and read(). Overlay isn't supported.
+
+audio
+ - The chip specs for the on-chip TV sound decoder are next
+ to useless :-/
+ - Neverless the builtin TV sound decoder starts working now,
+ at least for some standards.
+ FOR ANY REPORTS ON THIS PLEASE MENTION THE TV NORM YOU ARE
+ USING.
+ - Most tuner chips do provide mono sound, which may or may not
+ be useable depending on the board design. With the Hauppauge
+ cards it works, so there is mono sound available as fallback.
+ - audio data dma (i.e. recording without loopback cable to the
+ sound card) is supported via cx88-alsa.
+
+vbi
+ - Code present. Works for NTSC closed caption. PAL and other
+ TV norms may or may not work.
+
+
+how to add support for new cards
+================================
+
+The driver needs some config info for the TV cards. This stuff is in
+cx88-cards.c. If the driver doesn't work well you likely need a new
+entry for your card in that file. Check the kernel log (using dmesg)
+to see whenever the driver knows your card or not. There is a line
+like this one:
+
+ cx8800[0]: subsystem: 0070:3400, board: Hauppauge WinTV \
+ 34xxx models [card=1,autodetected]
+
+If your card is listed as "board: UNKNOWN/GENERIC" it is unknown to
+the driver. What to do then?
+
+ (1) Try upgrading to the latest snapshot, maybe it has been added
+ meanwhile.
+ (2) You can try to create a new entry yourself, have a look at
+ cx88-cards.c. If that worked, mail me your changes as unified
+ diff ("diff -u").
+ (3) Or you can mail me the config information. I need at least the
+ following informations to add the card:
+
+ * the PCI Subsystem ID ("0070:3400" from the line above,
+ "lspci -v" output is fine too).
+ * the tuner type used by the card. You can try to find one by
+ trial-and-error using the tuner=<n> insmod option. If you
+ know which one the card has you can also have a look at the
+ list in CARDLIST.tuner
+
+Have fun,
+
+ Gerd
+
+--
+Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]