Hi, > > My personal opinion is that formats in drm_fourcc.h should be > > independent of the CPU byte order and the function > > drm_mode_legacy_fb_format() and drivers depending on that incorrect > > assumption be fixed instead. > > The problem is this isn't a kernel-internal thing any more. With the > addition of the ADDFB2 ioctl the fourcc codes became part of the > kernel/userspace abi ...
Ok, added some printk's to the ADDFB and ADDFB2 code paths and tested a bit. Apparently pretty much all userspace still uses the ADDFB ioctl. xorg (modesetting driver) does. gnome-shell in wayland mode does. Seems the big transition to ADDFB2 didn't happen yet. I guess that makes changing drm_mode_legacy_fb_format + drivers a reasonable option ... cheers, Gerd
