Function intel_compressed 

fn intel_compressed(modifier: u64) -> bool

Whether modifier is one of Intel’s compressed (CCS) layouts. The plane count does not tell: DG2 and later keep the compression state outside the buffer, so theirs are single-plane, and the media driver reads such a buffer as if it were uncompressed. Intel’s uncompressed layouts are the few named here; every other one it defines is a CCS variant.