diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c index e35b341c3cef9e269ae158c4c4a661c9dd64319b..573b80f0c1536e970f7693b8ff283316e298091d 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.c +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c @@ -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);