diff options
| author | Gerd Hoffmann <kraxel@redhat.com> | 2018-09-05 08:04:43 +0200 |
|---|---|---|
| committer | Gerd Hoffmann <kraxel@redhat.com> | 2018-09-06 08:40:19 +0200 |
| commit | 6960e6da9cec3f6638121527c728305827ec12ab (patch) | |
| tree | f962fb5c76fe4059b8129fbebdb347226b378093 /drivers | |
| parent | drm: do not mask out DRM_FORMAT_BIG_ENDIAN (diff) | |
| download | linux-6960e6da9cec3f6638121527c728305827ec12ab.tar.xz linux-6960e6da9cec3f6638121527c728305827ec12ab.zip | |
drm: fix drm_mode_addfb() on big endian machines.
Userspace on big endian machhines typically expects the ADDFB ioctl
returns a big endian framebuffer. drm_mode_addfb() will call
drm_mode_addfb2() unconditionally with little endian DRM_FORMAT_*
values though, which is wrong. This patch fixes that.
Drivers (both kernel and xorg) have quirks in place to deal with the
broken drm_mode_addfb() behavior. Because of this we can't just change
drm_mode_addfb() behavior for everybody without breaking things. Add
the quirk_addfb_prefer_host_byte_order field to mode_config, so drivers
can opt-in.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20180905060445.15008-5-kraxel@redhat.com
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/drm_framebuffer.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_framebuffer.c b/drivers/gpu/drm/drm_framebuffer.c index 888c4d53cf23..f863f8a20f8c 100644 --- a/drivers/gpu/drm/drm_framebuffer.c +++ b/drivers/gpu/drm/drm_framebuffer.c @@ -124,6 +124,17 @@ int drm_mode_addfb(struct drm_device *dev, struct drm_mode_fb_cmd *or, r.pixel_format == DRM_FORMAT_XRGB2101010) r.pixel_format = DRM_FORMAT_XBGR2101010; + if (dev->mode_config.quirk_addfb_prefer_host_byte_order) { + if (r.pixel_format == DRM_FORMAT_XRGB8888) + r.pixel_format = DRM_FORMAT_HOST_XRGB8888; + if (r.pixel_format == DRM_FORMAT_ARGB8888) + r.pixel_format = DRM_FORMAT_HOST_ARGB8888; + if (r.pixel_format == DRM_FORMAT_RGB565) + r.pixel_format = DRM_FORMAT_HOST_RGB565; + if (r.pixel_format == DRM_FORMAT_XRGB1555) + r.pixel_format = DRM_FORMAT_HOST_XRGB1555; + } + ret = drm_mode_addfb2(dev, &r, file_priv); if (ret) return ret; |