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[media] V4L: Add v4l2_ctrl_subdev_subscribe_event() helper function
authorSylwester Nawrocki <sylvester.nawrocki@gmail.com>
Tue, 22 Jan 2013 22:00:23 +0000 (19:00 -0300)
committerMauro Carvalho Chehab <mchehab@redhat.com>
Tue, 5 Feb 2013 17:05:26 +0000 (15:05 -0200)
Add a v4l2 core helper function that can be used as the subdev
.subscribe_event handler. This allows to eliminate some boilerplate
from drivers that are only handling the control events.

Signed-off-by: Sylwester Nawrocki <sylvester.nawrocki@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

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