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| author | Antti Palosaari <crope@iki.fi> | 2014-07-19 03:21:16 +0400 |
|---|---|---|
| committer | Mauro Carvalho Chehab <m.chehab@samsung.com> | 2014-07-22 04:39:45 +0400 |
| commit | fea9c63a10142e6cd2bf48dca2cd39d79a300f2c (patch) | |
| tree | 7ff5672a244012fa556f216f179196f41d608f5c /Documentation/DocBook/media | |
| parent | d57fe404019b3c720e188156080c614290e1b78c (diff) | |
| download | linux-fea9c63a10142e6cd2bf48dca2cd39d79a300f2c.tar.xz | |
[media] DocBook media: v4l2_sdr_format buffersize field
New field buffersize was added to inform application maximum
buffer size used. Add it to documentation too.
Cc: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Diffstat (limited to 'Documentation/DocBook/media')
| -rw-r--r-- | Documentation/DocBook/media/v4l/dev-sdr.xml | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/Documentation/DocBook/media/v4l/dev-sdr.xml b/Documentation/DocBook/media/v4l/dev-sdr.xml index dc14804f5436..f8903568a243 100644 --- a/Documentation/DocBook/media/v4l/dev-sdr.xml +++ b/Documentation/DocBook/media/v4l/dev-sdr.xml @@ -72,9 +72,12 @@ To use the <link linkend="format">format</link> ioctls applications set the <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 only the <structfield>pixelformat</structfield> field of -&v4l2-sdr-format; is used. The content of that field is the V4L2 fourcc code -of the data format. +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"> @@ -92,8 +95,15 @@ 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[28]</structfield></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> |