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drm/i915/gen9: Implement WaForceEnableNonCoherent

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v2: Don't add WaHdcDisableFetchWhenMasked. Add stepping check for
WaForceEnableNonCoherent

Signed-off-by: Nick Hoath <nicholas.hoath@intel.com>
Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Hoath, Nicholas 2015-02-05 10:47:24 +00:00 committed by Daniel Vetter
parent 1840481f53
commit 13bea49c8b
1 changed files with 11 additions and 0 deletions
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11
drivers/gpu/drm/i915/intel_ringbuffer.c
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@ -902,6 +902,17 @@ static int gen9_init_workarounds(struct intel_engine_cs *ring)
GEN9_ENABLE_YV12_BUGFIX);
}
if (INTEL_REVID(dev) <= SKL_REVID_D0) {
/*
*Use Force Non-Coherent whenever executing a 3D context. This
* is a workaround for a possible hang in the unlikely event
* a TLB invalidation occurs during a PSD flush.
*/
/* WaForceEnableNonCoherent:skl */
WA_SET_BIT_MASKED(HDC_CHICKEN0,
HDC_FORCE_NON_COHERENT);
}
/* Wa4x4STCOptimizationDisable:skl */
WA_SET_BIT_MASKED(CACHE_MODE_1, GEN8_4x4_STC_OPTIMIZATION_DISABLE);