diff options
| author | Sakari Ailus <sakari.ailus@linux.intel.com> | 2017-06-08 16:59:58 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2017-06-20 08:14:34 -0300 |
| commit | e72cb0e79475b0d26625e802846e281a84304c07 (patch) | |
| tree | e03b5f6a29c593c0c84f6357a3505009c747539d /Documentation/media | |
| parent | 8e792f5287a99ba314c1ddb2b12a09f9c045b753 (diff) | |
[media] v4l: ctrls: Add a control for digital gain
Add V4L2_CID_DIGITAL_GAIN to control explicitly digital gain.
We already have analogue gain control which the digital gain control
complements. Typically higher quality images are obtained using analogue
gain only as the digital gain does not add information to the image
(rather it may remove it).
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'Documentation/media')
| -rw-r--r-- | Documentation/media/uapi/v4l/extended-controls.rst | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/media/uapi/v4l/extended-controls.rst b/Documentation/media/uapi/v4l/extended-controls.rst index 76c5b1aeaadd..9acc9cad49e2 100644 --- a/Documentation/media/uapi/v4l/extended-controls.rst +++ b/Documentation/media/uapi/v4l/extended-controls.rst @@ -3021,6 +3021,13 @@ Image Process Control IDs The video deinterlacing mode (such as Bob, Weave, ...). The menu items are driver specific and are documented in :ref:`v4l-drivers`. +``V4L2_CID_DIGITAL_GAIN (integer)`` + Digital gain is the value by which all colour components + are multiplied by. Typically the digital gain applied is the + control value divided by e.g. 0x100, meaning that to get no + digital gain the control value needs to be 0x100. The no-gain + configuration is also typically the default. + .. _dv-controls: |