On Sun, 2022-05-22 at 21:35 +0200, Thomas Zimmermann wrote:

quoted

Interesting. Did you find some formats that were not supported ?

We still don't support XRGB1555. If the native buffer uses this format, 
we'd have no conversion helper. In this case, we rely on userspace/fbcon 
to use the native format exclusively.  (BTW, I asked one of my coworkers 
to implement XRGB1555 to make her familiar with DRM. That's why I 
haven't sent a patch yet.)

Various old macs do 1555 ...

Cheers,
Ben.