Changing a user control value can trigger an event to other
users. Add support for that.
Signed-off-by: NTodor Tomov <todor.tomov@linaro.org>
Acked-by: NSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: NHans Verkuil <hansverk@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>