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ddrm/i915/bdw: Disable centroid pixel perf optimization 

BDW-A workaround

BDW Bug #1899532

v2: WARN on when not using preliminary HW support

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Jesse Barnes <jbarnes@virtuosugeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ben Widawsky 2013-11-04 22:52:39 -08:00 committed by Daniel Vetter
parent 4afe8d3347
commit fd392b6003
2 changed files with 7 additions and 0 deletions
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3
drivers/gpu/drm/i915/i915_reg.h
View File

@ -5007,6 +5007,9 @@
#define HSW_ROW_CHICKEN3 0xe49c
#define HSW_ROW_CHICKEN3_L3_GLOBAL_ATOMICS_DISABLE (1 << 6)
#define HALF_SLICE_CHICKEN3 0xe184
#define GEN8_CENTROID_PIXEL_OPT_DIS (1<<8)
#define G4X_AUD_VID_DID (dev_priv->info->display_mmio_offset + 0x62020)
#define INTEL_AUDIO_DEVCL 0x808629FB
#define INTEL_AUDIO_DEVBLC 0x80862801

4
drivers/gpu/drm/i915/intel_pm.c
View File

@ -5286,6 +5286,10 @@ static void gen8_init_clock_gating(struct drm_device *dev)
/* FIXME(BDW): Check all the w/a, some might only apply to
* pre-production hw. */
WARN(!i915_preliminary_hw_support,
"GEN8_CENTROID_PIXEL_OPT_DIS not be needed for production\n");
I915_WRITE(HALF_SLICE_CHICKEN3,
_MASKED_BIT_ENABLE(GEN8_CENTROID_PIXEL_OPT_DIS));
I915_WRITE(GAMTARBMODE, _MASKED_BIT_ENABLE(ARB_MODE_BWGTLB_DISABLE));
/* WaSwitchSolVfFArbitrationPriority */