FE_STREAM_PAD
FE_STREAM_PAD, 0);
fmt = v4l2_subdev_state_get_format(state, FE_STREAM_PAD);
case FE_STREAM_PAD:
fmt = v4l2_subdev_state_get_format(state, FE_STREAM_PAD);
sink_fmt = v4l2_subdev_state_get_format(state, FE_STREAM_PAD);
if (link->sink->index == FE_STREAM_PAD)
fe->pad[FE_STREAM_PAD].flags =