diff options
| author | Adam Jackson <ajax@redhat.com> | 2011-12-13 18:41:00 -0500 |
|---|---|---|
| committer | Keith Packard <keithp@keithp.com> | 2011-12-16 11:49:59 -0500 |
| commit | 3b5c78a35cf7511c15e09a9b0ffab290a42d9bcf (patch) | |
| tree | 1ac33469f850f6c84df493974cf6034991dcd0c1 /drivers/gpu/drm/i915/intel_drv.h | |
| parent | f45b55575cedb7efa782e43f1ea74338456d0381 (diff) | |
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 @@ | |||
| 110 | /* drm_display_mode->private_flags */ | 110 | /* drm_display_mode->private_flags */ |
| 111 | #define INTEL_MODE_PIXEL_MULTIPLIER_SHIFT (0x0) | 111 | #define INTEL_MODE_PIXEL_MULTIPLIER_SHIFT (0x0) |
| 112 | #define INTEL_MODE_PIXEL_MULTIPLIER_MASK (0xf << INTEL_MODE_PIXEL_MULTIPLIER_SHIFT) | 112 | #define INTEL_MODE_PIXEL_MULTIPLIER_MASK (0xf << INTEL_MODE_PIXEL_MULTIPLIER_SHIFT) |
| 113 | #define INTEL_MODE_DP_FORCE_6BPC (0x10) | ||
| 113 | 114 | ||
| 114 | static inline void | 115 | static inline void |
| 115 | intel_mode_set_pixel_multiplier(struct drm_display_mode *mode, | 116 | intel_mode_set_pixel_multiplier(struct drm_display_mode *mode, |