From da09654d777c361006f6ea3452f8de4a374d5783 Mon Sep 17 00:00:00 2001 From: Rodrigo Vivi Date: Fri, 19 Sep 2014 20:16:27 -0400 Subject: [PATCH] drm/i915/bdw: WaDisableFenceDestinationToSLM This WA affect BDW GT3 pre-production steppings. Signed-off-by: Rodrigo Vivi Reviewed-by: Mika Kuoppala [danvet: Don't mention steppings ...] Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_reg.h | 1 + drivers/gpu/drm/i915/intel_ringbuffer.c | 6 +++++- 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index ad8179b40d19..124ea60c1386 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -4836,6 +4836,7 @@ enum punit_power_well { /* GEN8 chicken */ #define HDC_CHICKEN0 0x7300 #define HDC_FORCE_NON_COHERENT (1<<4) +#define HDC_FENCE_DEST_SLM_DISABLE (1<<14) /* WaCatErrorRejectionIssue */ #define GEN7_SQ_CHICKEN_MBCUNIT_CONFIG 0x9030 diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c index 620a89dc868b..c21aaad55982 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.c +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c @@ -740,8 +740,12 @@ static int bdw_init_workarounds(struct intel_engine_cs *ring) * workaround for for a possible hang in the unlikely event a TLB * invalidation occurs during a PSD flush. */ + /* WaDisableFenceDestinationToSLM:bdw (GT3 pre-production) */ intel_ring_emit_wa(ring, HDC_CHICKEN0, - _MASKED_BIT_ENABLE(HDC_FORCE_NON_COHERENT)); + _MASKED_BIT_ENABLE(HDC_FORCE_NON_COHERENT | + (IS_BDW_GT3(dev) ? + HDC_FENCE_DEST_SLM_DISABLE : 0) + )); /* Wa4x4STCOptimizationDisable:bdw */ intel_ring_emit_wa(ring, CACHE_MODE_1, -- 2.20.1