From: Ben Widawsky <b...@bwidawsk.net>
Wa???
Signed-off-by: Ben Widawsky <b...@bwidawsk.net>
---
drivers/gpu/drm/i915/i915_reg.h | 1 +
drivers/gpu/drm/i915/intel_pm.c | 2 ++
2 files changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 9608f96..2d16363 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -656,6 +656,7 @@
#define ARB_MODE_SWIZZLE_SNB (1<<4)
#define ARB_MODE_SWIZZLE_IVB (1<<5)
#define GAMTARBMODE 0x04a08
+#define ARB_MODE_BWGTLB_DISABLE (1<<9)
#define ARB_MODE_SWIZZLE_BDW (1<<1)
#define RENDER_HWS_PGA_GEN7 (0x04080)
#define RING_FAULT_REG(ring) (0x4094 + 0x100*(ring)->id)
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 63f6e59..e6e12e1 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -5286,6 +5286,8 @@ static void gen8_init_clock_gating(struct drm_device *dev)
I915_WRITE(WM2_LP_ILK, 0);
I915_WRITE(WM1_LP_ILK, 0);
+ I915_WRITE(GAMTARBMODE, _MASKED_BIT_ENABLE(ARB_MODE_BWGTLB_DISABLE));
+
/* WaSwitchSolVfFArbitrationPriority */
I915_WRITE(GAM_ECOCHK, I915_READ(GAM_ECOCHK) | HSW_ECOCHK_ARB_PRIO_SOL);
--
1.8.4.2
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