C3_MIPI_CSI2_PAD_SINK
sink_pad = &csi->pads[C3_MIPI_CSI2_PAD_SINK];
case C3_MIPI_CSI2_PAD_SINK:
if (format->pad != C3_MIPI_CSI2_PAD_SINK)
sink_fmt = v4l2_subdev_state_get_format(state, C3_MIPI_CSI2_PAD_SINK);
csi->pads[C3_MIPI_CSI2_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
struct media_pad *sink = &csi->sd.entity.pads[C3_MIPI_CSI2_PAD_SINK];