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| author | Adam Jackson <ajax@redhat.com> | 2011-12-13 15:41:00 -0800 |
|---|---|---|
| committer | Keith Packard <keithp@keithp.com> | 2011-12-16 08:49:59 -0800 |
| commit | 3b5c78a35cf7511c15e09a9b0ffab290a42d9bcf (patch) | |
| tree | 1ac33469f850f6c84df493974cf6034991dcd0c1 /drivers/gpu/drm/i915/intel_drv.h | |
| parent | f45b55575cedb7efa782e43f1ea74338456d0381 (diff) | |
| download | linux-3b5c78a35cf7511c15e09a9b0ffab290a42d9bcf.tar.gz linux-3b5c78a35cf7511c15e09a9b0ffab290a42d9bcf.tar.bz2 linux-3b5c78a35cf7511c15e09a9b0ffab290a42d9bcf.zip | |
drm/i915/dp: Dither down to 6bpc if it makes the mode fit
Some active adaptors (VGA usually) only have two lanes at 2.7GHz.
That's a maximum pixel clock of 144MHz at 8bpc, but 192MHz at 6bpc.
Fixes Asus UX31 panel being black at startup due to no valid modes since
dc22ee6fc18ce0f15424e753e8473c306ece95c1.
v2: Rebased to current code, resulting in the fix applying to EDP panels as
well. Also changed from spatio-temporal to just spatial dithering on
pre-ironlake, to be conssitent (and less visual flicker)
Signed-off-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Tested-by: Eric Anholt <eric@anholt.net>
Tested-by: Dirk Hohndel <hohndel@infradead.org>
Signed-off-by: Keith Packard <keithp@keithp.com>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_drv.h')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_drv.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index bd9a604b73da..a1b4343814e8 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -110,6 +110,7 @@ /* drm_display_mode->private_flags */ #define INTEL_MODE_PIXEL_MULTIPLIER_SHIFT (0x0) #define INTEL_MODE_PIXEL_MULTIPLIER_MASK (0xf << INTEL_MODE_PIXEL_MULTIPLIER_SHIFT) +#define INTEL_MODE_DP_FORCE_6BPC (0x10) static inline void intel_mode_set_pixel_multiplier(struct drm_display_mode *mode, |