[media] V4L: Add v4l2_event_subdev_unsubscribe() helper function
Add a v4l2 core helper function that can be used as the subdev
.unsubscribe_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>
diff --git a/include/media/v4l2-event.h b/include/media/v4l2-event.h
index eff85f9..be05d01 100644
--- a/include/media/v4l2-event.h
+++ b/include/media/v4l2-event.h
@@ -64,6 +64,7 @@
*/
struct v4l2_fh;
+struct v4l2_subdev;
struct v4l2_subscribed_event;
struct video_device;
@@ -129,5 +130,6 @@
int v4l2_event_unsubscribe(struct v4l2_fh *fh,
const struct v4l2_event_subscription *sub);
void v4l2_event_unsubscribe_all(struct v4l2_fh *fh);
-
+int v4l2_event_subdev_unsubscribe(struct v4l2_subdev *sd, struct v4l2_fh *fh,
+ struct v4l2_event_subscription *sub);
#endif /* V4L2_EVENT_H */