diff options
| author | Thierry Reding <treding@nvidia.com> | 2017-11-14 16:09:30 +0100 |
|---|---|---|
| committer | Thierry Reding <treding@nvidia.com> | 2017-12-13 14:36:39 +0100 |
| commit | 71835caa00e8a64ada3c2e30c56468c39c81f60c (patch) | |
| tree | 90d73b05ff0493e666a66799df17fe53cdd84359 /drivers/gpu/drm/tegra | |
| parent | 7b2c2845e5d59db1d9dfa822436a71b2de18a7ee (diff) | |
drm/tegra: fb: Force alpha formats
Tegra20 and Tegra30 don't actually support the 24-bit RGB formats that
don't have an alpha component. In order to allow the fbdev emulation to
run on those chips, force the 32-bit RGBA formats.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'drivers/gpu/drm/tegra')
| -rw-r--r-- | drivers/gpu/drm/tegra/fb.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/gpu/drm/tegra/fb.c b/drivers/gpu/drm/tegra/fb.c index 406e895d82cc..1af4ef9241f1 100644 --- a/drivers/gpu/drm/tegra/fb.c +++ b/drivers/gpu/drm/tegra/fb.c @@ -253,6 +253,19 @@ static int tegra_fbdev_probe(struct drm_fb_helper *helper, cmd.height = sizes->surface_height; cmd.pitches[0] = round_up(sizes->surface_width * bytes_per_pixel, tegra->pitch_align); + + /* + * Early generations of Tegra (Tegra20 and Tegra30) do not support any + * of the X* or *X formats, only their A* or *A equivalents. Force the + * legacy framebuffer format to include an alpha component so that the + * framebuffer emulation can be supported on all generations. + */ + if (sizes->surface_bpp == 32 && sizes->surface_depth == 24) + sizes->surface_depth = 32; + + if (sizes->surface_bpp == 16 && sizes->surface_depth == 15) + sizes->surface_depth = 16; + cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, sizes->surface_depth); |