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ddrm/i915/bdw: Disable centroid pixel perf optimization

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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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4
drivers/gpu/drm/i915/intel_pm.c
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@@ -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 */