ADV748X_CSI2_SINK
src = adv748x_get_remote_sd(&tx->pads[ADV748X_CSI2_SINK]);
fmt = v4l2_subdev_state_get_format(sd_state, ADV748X_CSI2_SINK);
tx->pads[ADV748X_CSI2_SINK].flags = MEDIA_PAD_FL_SINK;
&tx->sd.entity, ADV748X_CSI2_SINK,
fmt = v4l2_subdev_state_get_format(state, ADV748X_CSI2_SINK);