[media] v4l2-subdev: add registered_async subdev core operation
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@osg.samsung.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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@ -179,6 +179,8 @@ struct v4l2_subdev_io_pin_config {
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* for it to be warned when the value of a control changes.
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*
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* @unsubscribe_event: remove event subscription from the control framework.
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*
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* @registered_async: the subdevice has been registered async.
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*/
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struct v4l2_subdev_core_ops {
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int (*log_status)(struct v4l2_subdev *sd);
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@ -211,6 +213,7 @@ struct v4l2_subdev_core_ops {
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struct v4l2_event_subscription *sub);
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int (*unsubscribe_event)(struct v4l2_subdev *sd, struct v4l2_fh *fh,
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struct v4l2_event_subscription *sub);
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int (*registered_async)(struct v4l2_subdev *sd);
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};
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/**
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