From 670027c507e99521d416994a18a498def9ef2ea3 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Andr=C3=A9=20Fabian=20Silva=20Delgado?= Date: Sat, 22 Oct 2016 19:31:08 -0300 Subject: Linux-libre 4.8.3-gnu --- Documentation/DocBook/media/v4l/vidioc-g-edid.xml | 173 ---------------------- 1 file changed, 173 deletions(-) delete mode 100644 Documentation/DocBook/media/v4l/vidioc-g-edid.xml (limited to 'Documentation/DocBook/media/v4l/vidioc-g-edid.xml') diff --git a/Documentation/DocBook/media/v4l/vidioc-g-edid.xml b/Documentation/DocBook/media/v4l/vidioc-g-edid.xml deleted file mode 100644 index b7602d30f..000000000 --- a/Documentation/DocBook/media/v4l/vidioc-g-edid.xml +++ /dev/null @@ -1,173 +0,0 @@ - - - ioctl VIDIOC_G_EDID, VIDIOC_S_EDID, VIDIOC_SUBDEV_G_EDID, VIDIOC_SUBDEV_S_EDID - &manvol; - - - - VIDIOC_G_EDID - VIDIOC_S_EDID - VIDIOC_SUBDEV_G_EDID - VIDIOC_SUBDEV_S_EDID - Get or set the EDID of a video receiver/transmitter - - - - - - int ioctl - int fd - int request - struct v4l2_edid *argp - - - - - int ioctl - int fd - int request - struct v4l2_edid *argp - - - - - - Arguments - - - - fd - - &fd; - - - - request - - VIDIOC_G_EDID, VIDIOC_S_EDID, VIDIOC_SUBDEV_G_EDID, VIDIOC_SUBDEV_S_EDID - - - - argp - - - - - - - - - Description - 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). - - When used with video nodes the pad 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 pad field represents the - input or output pad of the subdevice. If there is no EDID support for the given - pad value, then the &EINVAL; will be returned. - - To get the EDID data the application has to fill in the pad, - start_block, blocks and edid - fields, zero the reserved array and call - VIDIOC_G_EDID. The current EDID from block - start_block and of size blocks - will be placed in the memory edid points to. The edid - pointer must point to memory at least blocks * 128 bytes - large (the size of one block is 128 bytes). - - If there are fewer blocks than specified, then the driver will set blocks - to the actual number of blocks. If there are no EDID blocks available at all, then the error code - ENODATA is set. - - If blocks have to be retrieved from the sink, then this call will block until they - have been read. - - If start_block and blocks are - both set to 0 when VIDIOC_G_EDID is called, then the driver will - set blocks to the total number of available EDID blocks - and it will return 0 without copying any data. This is an easy way to discover how many - EDID blocks there are. Note that if there are no EDID blocks available at all, then - the driver will set blocks to 0 and it returns 0. - - To set the EDID blocks of a receiver the application has to fill in the pad, - blocks and edid fields, set - start_block to 0 and zero the reserved array. - 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. - - 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 blocks is set to the maximum that the hardware supports. - If start_block is any - value other than 0 then the error code EINVAL is set. - - To disable an EDID you set blocks 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. - - - - struct <structname>v4l2_edid</structname> - - &cs-str; - - - __u32 - pad - 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. - - - __u32 - start_block - Read the EDID from starting with this block. Must be 0 when setting - the EDID. - - - __u32 - blocks - 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 - blocks is 0, then the EDID is disabled or erased. - - - __u32 - reserved[5] - Reserved for future extensions. Applications and drivers must - set the array to zero. - - - __u8 * - edid - Pointer to memory that contains the EDID. The minimum size is - blocks * 128. - - - -
- - - - &return-value; - - - - ENODATA - - The EDID data is not available. - - - - E2BIG - - The EDID data you provided is more than the hardware can handle. - - - - - -- cgit v1.2.3