Laurent Pinchart wrote:
> Those control, as their names imply, control the camera aperture
> settings.
> 
> Signed-off-by: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
> ---
>  Documentation/DocBook/v4l/compat.xml      |   11 +++++++++++
>  Documentation/DocBook/v4l/controls.xml    |   19 +++++++++++++++++++
>  Documentation/DocBook/v4l/videodev2.h.xml |    3 +++
>  include/linux/videodev2.h                 |    3 +++
>  4 files changed, 36 insertions(+), 0 deletions(-)
> 
> diff --git a/Documentation/DocBook/v4l/compat.xml 
> b/Documentation/DocBook/v4l/compat.xml
> index b9dbdf9..854235b 100644
> --- a/Documentation/DocBook/v4l/compat.xml
> +++ b/Documentation/DocBook/v4l/compat.xml
> @@ -2332,6 +2332,17 @@ more information.</para>
>       </listitem>
>        </orderedlist>
>      </section>
> +    <section>
> +      <title>V4L2 in Linux 2.6.34</title>
> +      <orderedlist>
> +     <listitem>
> +       <para>Added
> +<constant>V4L2_CID_IRIS_ABSOLUTE</constant> and
> +<constant>V4L2_CID_IRIS_RELATIVE</constant> controls to the
> +         <link linkend="camera-controls">Camera controls class</link>.
> +       </para>
> +     </listitem>
> +      </orderedlist>
>     </section>
>  
>     <section id="other">
> diff --git a/Documentation/DocBook/v4l/controls.xml 
> b/Documentation/DocBook/v4l/controls.xml
> index f464506..c412e89 100644
> --- a/Documentation/DocBook/v4l/controls.xml
> +++ b/Documentation/DocBook/v4l/controls.xml
> @@ -1825,6 +1825,25 @@ wide-angle direction. The zoom speed unit is 
> driver-specific.</entry>
>         <row><entry></entry></row>
>  
>         <row>
> +         <entry 
> spanname="id"><constant>V4L2_CID_IRIS_ABSOLUTE</constant>&nbsp;</entry>
> +         <entry>integer</entry>
> +       </row><row><entry spanname="descr">This control sets the
> +camera aperture's to the specified value. The unit is undefined.
> +Positive values open the iris, negative close it.</entry>
> +       </row>
> +       <row><entry></entry></row>
> +
> +       <row>
> +         <entry 
> spanname="id"><constant>V4L2_CID_IRIS_RELATIVE</constant>&nbsp;</entry>
> +         <entry>integer</entry>
> +       </row><row><entry spanname="descr">This control modifies the
> +camera aperture's by the specified amount. The unit is undefined.
> +Positive values open the iris one step further, negative values close
> +it one step further. This is a write-only control.</entry>
> +       </row>
> +       <row><entry></entry></row>
> +
> +       <row>
>           <entry 
> spanname="id"><constant>V4L2_CID_PRIVACY</constant>&nbsp;</entry>
>           <entry>boolean</entry>
>         </row><row><entry spanname="descr">Prevent video from being acquired

Seems ok to me, but it would be good to add some sort of scale for those 
controls.

Cheers,
Mauro
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