[Intel-gfx] [PATCH 1/4] drm/i915/bxt: Enable WaVSRefCountFullforceMissDisable

[Nick Hoath]

From: Rafael Barbalho <rafael.barbalho at intel.com>

Signed-off-by: Rafael Barbalho <rafael.barbalho at intel.com>
Signed-off-by: Nick Hoath <nicholas.hoath at intel.com>
---
 drivers/gpu/drm/i915/intel_pm.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 32ff034..d635d0a 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -59,6 +59,11 @@ static void gen9_init_clock_gating(struct drm_device *dev)
 	/* WaEnableLbsSlaRetryTimerDecrement:skl */
 	I915_WRITE(BDW_SCRATCH1, I915_READ(BDW_SCRATCH1) |
 		   GEN9_LBS_SLA_RETRY_TIMER_DECREMENT_ENABLE);
+
+	/* WaVSRefCountFullforceMissDisable:skl,bxt */
+	I915_WRITE(GEN7_FF_THREAD_MODE,
+		   I915_READ(GEN7_FF_THREAD_MODE) &
+		   ~(GEN7_FF_VS_REF_CNT_FFME));
 }
 
 static void skl_init_clock_gating(struct drm_device *dev)
-- 
2.1.1