[media] ov9650: add support for asynchronous probing

Allow the sub-device to be probed asynchronously so a bridge driver that's
waiting for the device can be notified and its .bound callback executed.

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Tested-by: H . Nikolaus Schaller <hns@goldelico.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

diff --git a/drivers/media/i2c/ov9650.c b/drivers/media/i2c/ov9650.c
index be5a7fd..502c722 100644 (file)
--- a/drivers/media/i2c/ov9650.c
+++ b/drivers/media/i2c/ov9650.c
@@ -23,6 +23,7 @@
 #include <linux/videodev2.h>
 
 #include <media/media-entity.h>
+#include <media/v4l2-async.h>
 #include <media/v4l2-ctrls.h>
 #include <media/v4l2-device.h>
 #include <media/v4l2-event.h>
@@ -1520,6 +1521,10 @@ static int ov965x_probe(struct i2c_client *client,
        /* Update exposure time min/max to match frame format */
        ov965x_update_exposure_ctrl(ov965x);
 
+       ret = v4l2_async_register_subdev(sd);
+       if (ret < 0)
+               goto err_ctrls;
+
        return 0;
 err_ctrls:
        v4l2_ctrl_handler_free(sd->ctrl_handler);
@@ -1532,7 +1537,7 @@ static int ov965x_remove(struct i2c_client *client)
 {
        struct v4l2_subdev *sd = i2c_get_clientdata(client);
 
-       v4l2_device_unregister_subdev(sd);
+       v4l2_async_unregister_subdev(sd);
        v4l2_ctrl_handler_free(sd->ctrl_handler);
        media_entity_cleanup(&sd->entity);