V4L2 sub-devices that are registered asynchronously have no way to know
when they have been registration with a V4L2 device but they might need
to take some action after this.
So let's add a callback that can be executed by the V4L2 async core to
allow sub-devices drivers to do any needed initialization that depends
on the registration.
Signed-off-by: Javier Martinez Canillas <javier@xxxxxxxxxxxxxxx>
---
include/media/v4l2-subdev.h | 3 +++
1 file changed, 3 insertions(+)
diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h
index b273cf9ac047..11e2dfec0198 100644
--- a/include/media/v4l2-subdev.h
+++ b/include/media/v4l2-subdev.h
@@ -179,6 +179,8 @@ struct v4l2_subdev_io_pin_config {
* for it to be warned when the value of a control changes.
*
* @unsubscribe_event: remove event subscription from the control framework.
+ *
+ * @registered_async: the subdevice has been registered async.
*/
struct v4l2_subdev_core_ops {
int (*log_status)(struct v4l2_subdev *sd);
@@ -211,6 +213,7 @@ struct v4l2_subdev_core_ops {
struct v4l2_event_subscription *sub);
int (*unsubscribe_event)(struct v4l2_subdev *sd, struct v4l2_fh *fh,
struct v4l2_event_subscription *sub);
+ int (*registered_async)(struct v4l2_subdev *sd);
};
/**
--
2.5.0
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