It‘s actually a drm_fourcc code problem, but I don’t known where to ask.
In drm_fourcc I cannot find 1 plane YUV 444 format, which is very useful.
It has VUY888 fourcc_code(‘V’, ‘U’, ‘2’, ‘4’), but YUV444 fourcc_code(‘Y’, ‘U’, ‘2’, ‘4’) is 3 plane YCbCr