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Groups > linux.kernel > #1630164
| From | Michel Dänzer <michel@daenzer.net> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH 3/6] drm: fourcc byteorder: add bigendian support to drm_mode_legacy_fb_format |
| Date | 2017-04-25 05:20 +0200 |
| Message-ID | <tzZbb-7xO-13@gated-at.bofh.it> (permalink) |
| References | <tzFFv-3rT-3@gated-at.bofh.it> <tzFFv-3rT-1@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On 24/04/17 03:25 PM, Gerd Hoffmann wrote:
> Return correct fourcc codes on bigendian. Drivers must be adapted to
> this change.
>
> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Just to reiterate, this won't work for the radeon driver, which programs
the GPU to use (effectively, per the current definition that these are
little endian GPU formats) DRM_FORMAT_XRGB8888 with pre-R600 and
DRM_FORMAT_BGRX8888 with >= R600.
> +#ifdef __BIG_ENDIAN
> + switch (bpp) {
> + case 8:
> + fmt = DRM_FORMAT_C8;
> + break;
> + case 24:
> + fmt = DRM_FORMAT_BGR888;
> + break;
BTW, endianness as a concept cannot apply to 8 or 24 bpp formats.
--
Earthling Michel Dänzer | http://www.amd.com
Libre software enthusiast | Mesa and X developer
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[PATCH 3/6] drm: fourcc byteorder: add bigendian support to drm_mode_legacy_fb_format Gerd Hoffmann <kraxel@redhat.com> - 2017-04-24 08:30 +0200
Re: [PATCH 3/6] drm: fourcc byteorder: add bigendian support to drm_mode_legacy_fb_format Michel Dänzer <michel@daenzer.net> - 2017-04-25 05:20 +0200
Re: [PATCH 3/6] drm: fourcc byteorder: add bigendian support to drm_mode_legacy_fb_format Ville Syrjälä <ville.syrjala@linux.intel.com> - 2017-04-25 12:00 +0200
Re: [PATCH 3/6] drm: fourcc byteorder: add bigendian support to drm_mode_legacy_fb_format Michel Dänzer <michel@daenzer.net> - 2017-04-26 04:10 +0200
Re: [PATCH 3/6] drm: fourcc byteorder: add bigendian support to drm_mode_legacy_fb_format Ville Syrjälä <ville.syrjala@linux.intel.com> - 2017-04-26 16:40 +0200
Re: [PATCH 3/6] drm: fourcc byteorder: add bigendian support to drm_mode_legacy_fb_format Gerd Hoffmann <kraxel@redhat.com> - 2017-04-26 08:00 +0200
Re: [PATCH 3/6] drm: fourcc byteorder: add bigendian support to drm_mode_legacy_fb_format Michel Dänzer <michel@daenzer.net> - 2017-04-26 11:40 +0200
Re: [PATCH 3/6] drm: fourcc byteorder: add bigendian support to drm_mode_legacy_fb_format Gerd Hoffmann <kraxel@redhat.com> - 2017-04-26 14:20 +0200
Re: [PATCH 3/6] drm: fourcc byteorder: add bigendian support to drm_mode_legacy_fb_format Michel Dänzer <michel@daenzer.net> - 2017-04-27 03:00 +0200
Re: [PATCH 3/6] drm: fourcc byteorder: add bigendian support to drm_mode_legacy_fb_format Gerd Hoffmann <kraxel@redhat.com> - 2017-04-27 08:50 +0200
Re: [PATCH 3/6] drm: fourcc byteorder: add bigendian support to drm_mode_legacy_fb_format Michel Dänzer <michel@daenzer.net> - 2017-04-27 09:10 +0200
Re: [PATCH 3/6] drm: fourcc byteorder: add bigendian support to drm_mode_legacy_fb_format Gerd Hoffmann <kraxel@redhat.com> - 2017-04-28 12:10 +0200
Re: [PATCH 3/6] drm: fourcc byteorder: add bigendian support to drm_mode_legacy_fb_format Eric Engestrom <eric.engestrom@imgtec.com> - 2017-04-26 15:30 +0200
Re: [PATCH 3/6] drm: fourcc byteorder: add bigendian support to drm_mode_legacy_fb_format Gerd Hoffmann <kraxel@redhat.com> - 2017-04-26 16:00 +0200
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