RKISP1_CSI_PAD_SRC
if (code->pad == RKISP1_CSI_PAD_SRC) {
src_fmt = v4l2_subdev_state_get_format(sd_state, RKISP1_CSI_PAD_SRC);
if (fmt->pad == RKISP1_CSI_PAD_SRC)
src_fmt = v4l2_subdev_state_get_format(sd_state, RKISP1_CSI_PAD_SRC);
pads[RKISP1_CSI_PAD_SRC].flags = MEDIA_PAD_FL_SOURCE |
RKISP1_CSI_PAD_SRC,