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-rw-r--r--Documentation/media/uapi/v4l/extended-controls.rst7
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: