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authorSylwester Nawrocki <sylvester.nawrocki@gmail.com>2013-01-22 19:00:23 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2013-02-05 15:05:26 -0200
commit22fa4279eebc3fa4b3c3dc2b190158dbbafcda9f (patch)
tree35e661c4993be3dda8342f836c8a7d7dc9e067c6 /drivers/media
parent4f4d14b70a29c679dd53e367b0d9b007a7117ee3 (diff)
[media] V4L: Add v4l2_ctrl_subdev_subscribe_event() helper function
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>
Diffstat (limited to 'drivers/media')
-rw-r--r--drivers/media/v4l2-core/v4l2-ctrls.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
index 3f27571b814..9051ec53875 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
@@ -2885,6 +2885,15 @@ int v4l2_ctrl_subscribe_event(struct v4l2_fh *fh,
}
EXPORT_SYMBOL(v4l2_ctrl_subscribe_event);
+int v4l2_ctrl_subdev_subscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh,
+ struct v4l2_event_subscription *sub)
+{
+ if (!sd->ctrl_handler)
+ return -EINVAL;
+ return v4l2_ctrl_subscribe_event(fh, sub);
+}
+EXPORT_SYMBOL(v4l2_ctrl_subdev_subscribe_event);
+
unsigned int v4l2_ctrl_poll(struct file *file, struct poll_table_struct *wait)
{
struct v4l2_fh *fh = file->private_data;