[Intel-gfx] [PATCH] drm/i915/cnl: WA FtrEnableFastAnisoL1BankingFix

[Rodrigo Vivi]

WA to enable HW L1 Banking fix that allows aniso to operate
at full sample rate.

Cc: Mika Kuoppala <mika.kuoppala at intel.com>
Cc: Oscar Mateo <oscar.mateo at intel.com>
Cc: Ben Widawsky <ben at bwidawsk.net>
Cc: Anuj Phogat <anuj.phogat at intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi at intel.com>
---
 drivers/gpu/drm/i915/i915_reg.h        | 1 +
 drivers/gpu/drm/i915/intel_engine_cs.c | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index e2908ae34004..1ad22a824921 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -8072,6 +8072,7 @@ enum {
 #define   HSW_SAMPLE_C_PERFORMANCE	(1<<9)
 #define   GEN8_CENTROID_PIXEL_OPT_DIS	(1<<8)
 #define   GEN9_DISABLE_OCL_OOB_SUPPRESS_LOGIC	(1<<5)
+#define   CNL_FAST_ANISO_L1_BANKING_FIX	(1<<4)
 #define   GEN8_SAMPLER_POWER_BYPASS_DIS	(1<<1)
 
 #define GEN9_HALF_SLICE_CHICKEN7	_MMIO(0xe194)
diff --git a/drivers/gpu/drm/i915/intel_engine_cs.c b/drivers/gpu/drm/i915/intel_engine_cs.c
index a6ac9d0a4156..4b9b7828802d 100644
--- a/drivers/gpu/drm/i915/intel_engine_cs.c
+++ b/drivers/gpu/drm/i915/intel_engine_cs.c
@@ -1090,6 +1090,9 @@ static int cnl_init_workarounds(struct intel_engine_cs *engine)
 	/* WaPushConstantDereferenceHoldDisable:cnl */
 	WA_SET_BIT(GEN7_ROW_CHICKEN2, PUSH_CONSTANT_DEREF_DISABLE);
 
+	/* FtrEnableFastAnisoL1BankingFix: cnl */
+	WA_SET_BIT_MASKED(HALF_SLICE_CHICKEN3, CNL_FAST_ANISO_L1_BANKING_FIX);
+
 	/* WaEnablePreemptionGranularityControlByUMD:cnl */
 	ret= wa_ring_whitelist_reg(engine, GEN8_CS_CHICKEN1);
 	if (ret)
-- 
2.13.2