[media] adv7604: Add support for asynchronous probing

Register the device with the v4l2 asynchronous probing framework to
support asynchronous instantiation systems such as DT.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/media/i2c/adv7604.c b/drivers/media/i2c/adv7604.c
index 338baa4c23ef..7358853bf092 100644
--- a/drivers/media/i2c/adv7604.c
+++ b/drivers/media/i2c/adv7604.c
@@ -2333,6 +2333,11 @@ static int adv7604_probe(struct i2c_client *client,
                 goto err_entity;
         v4l2_info(sd, "%s found @ 0x%x (%s)\n", client->name,
                         client->addr << 1, client->adapter->name);
+
+        err = v4l2_async_register_subdev(sd);
+        if (err)
+                goto err_entity;
+
         return 0;
 
 err_entity:
@@ -2356,6 +2361,7 @@ static int adv7604_remove(struct i2c_client *client)
 
         cancel_delayed_work(&state->delayed_work_enable_hotplug);
         destroy_workqueue(state->work_queues);
+        v4l2_async_unregister_subdev(sd);
         v4l2_device_unregister_subdev(sd);
         media_entity_cleanup(&sd->entity);
         adv7604_unregister_clients(to_state(sd));