diff options
| author | Sylwester Nawrocki <sylvester.nawrocki@gmail.com> | 2013-01-22 19:00:23 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2013-02-05 15:05:26 -0200 |
| commit | 22fa4279eebc3fa4b3c3dc2b190158dbbafcda9f (patch) | |
| tree | 35e661c4993be3dda8342f836c8a7d7dc9e067c6 | |
| parent | 4f4d14b70a29c679dd53e367b0d9b007a7117ee3 (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>
| -rw-r--r-- | drivers/media/v4l2-core/v4l2-ctrls.c | 9 | ||||
| -rw-r--r-- | include/media/v4l2-ctrls.h | 5 |
2 files changed, 14 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; diff --git a/include/media/v4l2-ctrls.h b/include/media/v4l2-ctrls.h index 91125b6f05a..1e849461fc9 100644 --- a/include/media/v4l2-ctrls.h +++ b/include/media/v4l2-ctrls.h @@ -654,4 +654,9 @@ int v4l2_subdev_s_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *cs int v4l2_subdev_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl); int v4l2_subdev_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl); +/* Can be used as a subscribe_event function that just subscribes control + events. */ +int v4l2_ctrl_subdev_subscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh, + struct v4l2_event_subscription *sub); + #endif |