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Commit 371f9449 authored by Sakari Ailus's avatar Sakari Ailus Committed by Mauro Carvalho Chehab
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[media] v4l: controls: Improve documentation for V4L2_CID_GAIN 



Elaborate the differences between V4L2_CID_GAIN and gain-type specific
V4L2_CID_DIGITAL_GAIN and V4L2_CID_ANALOGUE_GAIN.

Signed-off-by: default avatarSakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: default avatarHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
parent e72cb0e7

Documentation/media/uapi/v4l/control.rst

+6 −0
Original line number Diff line number Diff line
@@ -137,6 +137,12 @@ Control IDs 
``V4L2_CID_GAIN`` ``(integer)``

    Gain control.



    Primarily used to control gain on e.g. TV tuners but also on

    webcams. Most devices control only digital gain with this control

    but on some this could include analogue gain as well. Devices that

    recognise the difference between digital and analogue gain use

    controls ``V4L2_CID_DIGITAL_GAIN`` and ``V4L2_CID_ANALOGUE_GAIN``.



``V4L2_CID_HFLIP`` ``(boolean)``

    Mirror the picture horizontally.