diff options
| author | Hans Verkuil <hans.verkuil@cisco.com> | 2011-08-26 07:31:13 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2011-09-21 09:52:21 -0300 |
| commit | 74a45790861f659058e8f8b565d98e5a1fdd8440 (patch) | |
| tree | 753280699fda90996de8006469046876124bea0e /Documentation/DocBook/media/v4l/compat.xml | |
| parent | b57ce4179b502b3f481f7632da20aae3e488e31a (diff) | |
| download | blackbird-obmc-linux-74a45790861f659058e8f8b565d98e5a1fdd8440.tar.gz blackbird-obmc-linux-74a45790861f659058e8f8b565d98e5a1fdd8440.zip | |
[media] videodev2.h: add V4L2_CTRL_FLAG_VOLATILE
Add a new VOLATILE control flag that is set for volatile controls.
That way applications know whether the value of the control is volatile
(i.e. can change continuously) or not.
Until now this was an internal property, but it is useful to know in
userspace as well.
A typical use case is the gain value when autogain is on. In that case the
hardware will continuously adjust the gain based various environmental
factors.
This patch just adds and documents the flag, it's not yet used.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Hans de Goede <hdegoede@redhat.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 | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Documentation/DocBook/media/v4l/compat.xml b/Documentation/DocBook/media/v4l/compat.xml index ce1004a7da52..91410b6e7e08 100644 --- a/Documentation/DocBook/media/v4l/compat.xml +++ b/Documentation/DocBook/media/v4l/compat.xml @@ -2370,6 +2370,14 @@ that used it. It was originally scheduled for removal in 2.6.35. </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> + </orderedlist> + </section> <section id="other"> <title>Relation of V4L2 to other Linux multimedia APIs</title> |
