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-rw-r--r--drivers/media/v4l2-core/v4l2-ctrls.c9
-rw-r--r--include/media/v4l2-ctrls.h5
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 3f27571b814d..9051ec53875c 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 91125b6f05a5..1e849461fc9d 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