SRU_PAD_SOURCE
case SRU_PAD_SOURCE:
format = v4l2_subdev_state_get_format(state, SRU_PAD_SOURCE);
sru_try_format(sru, state, SRU_PAD_SOURCE, format);
output = v4l2_subdev_state_get_format(state, SRU_PAD_SOURCE);
output = v4l2_subdev_state_get_format(state, SRU_PAD_SOURCE);
output = v4l2_subdev_state_get_format(state, SRU_PAD_SOURCE);