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| author | Gerd Hoffmann <kraxel@redhat.com> | 2018-09-21 15:47:03 +0200 |
|---|---|---|
| committer | Gerd Hoffmann <kraxel@redhat.com> | 2018-09-25 14:49:49 +0200 |
| commit | 42fd9e6c29b39481fd4ef31715c6f0c427966f20 (patch) | |
| tree | 8f697ec360f12ce1925c3b790be4576f39ca1631 /drivers/gpu/drm/virtio/virtgpu_fb.c | |
| parent | 86351de023dd3607b1b519f58c11154b217ec031 (diff) | |
| download | talos-obmc-linux-42fd9e6c29b39481fd4ef31715c6f0c427966f20.tar.gz talos-obmc-linux-42fd9e6c29b39481fd4ef31715c6f0c427966f20.zip | |
drm/virtio: fix DRM_FORMAT_* handling
Use DRM_FORMAT_HOST_XRGB8888, so we are using the correct format code
on bigendian machines. Also set the quirk_addfb_prefer_host_byte_order
mode_config bit so drm_mode_addfb() asks for the correct format code.
Both DRM_FORMAT_* and VIRTIO_GPU_FORMAT_* are defined to be little
endian, so using a different mapping on bigendian machines is wrong.
It's there because of broken drm_mode_addfb() behavior. So with
drm_mode_addfb() being fixed we can fix this too.
While wading through the code I've noticed we have a little issue in
virtio: We attach a format to the bo when it is created
(DRM_IOCTL_MODE_CREATE_DUMB), not when we map it as framebuffer
(DRM_IOCTL_MODE_ADDFB). Easy way out: Support a single format only.
Pick DRM_FORMAT_HOST_XRGB8888, it is the only one actually used in
practice. Drop unused mappings in virtio_gpu_translate_format().
With this patch applied both ADDFB and ADDFB2 ioctls work correctly in
the virtio-gpu.ko driver on big endian machines. Without the patch only
ADDFB (which still seems to be used by the majority of userspace) works
correctly.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20180921134704.12826-6-kraxel@redhat.com
Diffstat (limited to 'drivers/gpu/drm/virtio/virtgpu_fb.c')
| -rw-r--r-- | drivers/gpu/drm/virtio/virtgpu_fb.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/virtio/virtgpu_fb.c b/drivers/gpu/drm/virtio/virtgpu_fb.c index 3364b0970dd2..e1e41efabec1 100644 --- a/drivers/gpu/drm/virtio/virtgpu_fb.c +++ b/drivers/gpu/drm/virtio/virtgpu_fb.c @@ -226,7 +226,7 @@ static int virtio_gpufb_create(struct drm_fb_helper *helper, mode_cmd.width = sizes->surface_width; mode_cmd.height = sizes->surface_height; mode_cmd.pitches[0] = mode_cmd.width * 4; - mode_cmd.pixel_format = drm_mode_legacy_fb_format(32, 24); + mode_cmd.pixel_format = DRM_FORMAT_HOST_XRGB8888; format = virtio_gpu_translate_format(mode_cmd.pixel_format); if (format == 0) |
