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"For the reason stated by Sakari in patch 1/9 (dependency from MC to V4L2), I don't think a "media_async_register_subdev()" function is a good idea." The reason already NOT existed in v7, I removed v4l2_fwnode_endpoint from media_pad. So MC will not depdent to V4L2. So this comments is not suit for this version. Frank