RKCIF_IF_PAD_SINK
&remote->interface->pads[RKCIF_IF_PAD_SINK];
media_pad_remote_pad_first(&sd->entity.pads[RKCIF_IF_PAD_SINK]);
mask = v4l2_subdev_state_xlate_streams(state, RKCIF_IF_PAD_SINK,
media_pad_remote_pad_first(&sd->entity.pads[RKCIF_IF_PAD_SINK]);
mask = v4l2_subdev_state_xlate_streams(state, RKCIF_IF_PAD_SINK,
.sink_pad = RKCIF_IF_PAD_SINK,
pads[RKCIF_IF_PAD_SINK].flags = MEDIA_PAD_FL_SINK;