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| author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2013-04-19 13:24:34 +0400 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2013-04-24 15:06:05 +0400 |
| commit | 996a2239f93b03c5972923f04b097f65565c5bed (patch) | |
| tree | adf93b9149e91f13b01916b3a642bffe6f8bdb69 | |
| parent | fd0c06420d39958032655a04cfd194d5a7b38f83 (diff) | |
| download | linux-996a2239f93b03c5972923f04b097f65565c5bed.tar.xz | |
drm/i915: Disable high-bpc on pre-1.4 EDID screens
Prevents black screens when using 30bpp framebuffers on my
HDMI screens here. The DP input on the same screen though reports a
1.4 EDID with the correct 8bpc limit set.
v2: Actually check for the right thing!
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 988e543ec45b..15ce99125c64 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -7694,6 +7694,13 @@ pipe_config_set_bpp(struct drm_crtc *crtc, bpp, connector->display_info.bpc*3); pipe_config->pipe_bpp = connector->display_info.bpc*3; } + + /* Clamp bpp to 8 on screens without EDID 1.4 */ + if (connector->display_info.bpc == 0 && bpp > 24) { + DRM_DEBUG_KMS("clamping display bpp (was %d) to default limit of 24\n", + bpp); + pipe_config->pipe_bpp = 24; + } } return bpp; |