On Tue, Jul 12, 2022 at 10:01:15AM +0200, Geert Uytterhoeven wrote:
Hi Gerd,
It IMHO is not applicable to any physical hardware. It's used by
virtio-gpu where the supported format depends on the byte order
(it is argb8888 in native byte order). Only virtual hardware can
have that kind of behavior.
And we can probably drop the DRM_FORMAT_HOST_* variants for 1555 and
565, they are not used anywhere.
Atari DRM supports (big-endian) RGB565, so it uses
DRM_FORMAT_HOST_RGB565.
Fixed big endian should use 'DRM_FORMAT_RGB565 | DRM_FORMAT_BIG_ENDIAN'.
As described above DRM_FORMAT_HOST_RGB565 means bigendian on bigendian
hosts and little endian on little endian hosts. Which is not correct
when your hardware does big endian no matter what.
take care,
Gerd
