Re: [PATCH 1/3] drm/fourcc: Add missing big-endian XRGB1555 and RGB565 formats

From: Gerd Hoffmann
Date: Tue Jul 12 2022 - 05:03:21 EST

> > 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.
> But (a) drm_driver_legacy_fb_format() uses DRM_FORMAT_HOST_RGB565
> if quirk_addfb_prefer_host_byte_order is set,

Ah, right. Missed that in 'git grep' output. Given that traditional
fbdev behavior is to expect native byte order using
DRM_FORMAT_HOST_RGB565 there makes sense indeed.

Scratch my comment about it being unused then ;)