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| author | Hans Verkuil <hans.verkuil@cisco.com> | 2012-01-11 06:45:05 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-01-23 16:34:27 -0200 |
| commit | 583aa3a9b5ca846a84f7dd87bdc4b75dca07b011 (patch) | |
| tree | a86d9d5f2e9817e9faf9d2e06d212d4380924fe9 /Documentation/DocBook/media/v4l/compat.xml | |
| parent | 93596ef7db3e9bcc9306c3e93cf28ce1048858b6 (diff) | |
| download | blackbird-op-linux-583aa3a9b5ca846a84f7dd87bdc4b75dca07b011.tar.gz blackbird-op-linux-583aa3a9b5ca846a84f7dd87bdc4b75dca07b011.zip | |
[media] V4L2: Add per-device-node capabilities
If V4L2_CAP_DEVICE_CAPS is set, then the new device_caps field is filled with
the capabilities of the opened device node.
The capabilities field traditionally contains the capabilities of the physical
device, being a superset of all capabilities available at the several device
nodes. E.g., if you open /dev/video0, then if it contains VBI caps then that means
that there is a corresponding vbi node as well. And the capabilities field of
both the video and vbi nodes should contain identical caps.
However, it would be very useful to also have a capabilities field that contains
just the caps for the currently open device, hence the new CAP bit and field.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'Documentation/DocBook/media/v4l/compat.xml')
| -rw-r--r-- | Documentation/DocBook/media/v4l/compat.xml | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/DocBook/media/v4l/compat.xml b/Documentation/DocBook/media/v4l/compat.xml index c736380b4647..c93298ff3279 100644 --- a/Documentation/DocBook/media/v4l/compat.xml +++ b/Documentation/DocBook/media/v4l/compat.xml @@ -2393,6 +2393,10 @@ details.</para> 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> |
