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-rw-r--r--drivers/gpu/drm/i915/i915_reg.h1
-rw-r--r--drivers/gpu/drm/i915/intel_pm.c2
2 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 5e820fa91dba..b0bb1a598554 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -3470,6 +3470,7 @@
#define GEN7_L3CNTLREG1 0xB01C
#define GEN7_WA_FOR_GEN7_L3_CONTROL 0x3C4FFF8C
+#define GEN7_L3AGDIS (1<<19)
#define GEN7_L3_CHICKEN_MODE_REGISTER 0xB030
#define GEN7_WA_L3_CHICKEN_MODE 0x20000000
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 60d0404fe98b..a9e2c546de9a 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3677,7 +3677,7 @@ static void valleyview_init_clock_gating(struct drm_device *dev)
GEN7_CSC1_RHWO_OPT_DISABLE_IN_RCC);
/* WaApplyL3ControlAndL3ChickenMode requires those two on Ivy Bridge */
- I915_WRITE(GEN7_L3CNTLREG1, GEN7_WA_FOR_GEN7_L3_CONTROL);
+ I915_WRITE(GEN7_L3CNTLREG1, I915_READ(GEN7_L3CNTLREG1) | GEN7_L3AGDIS);
I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER, GEN7_WA_L3_CHICKEN_MODE);
/* WaForceL3Serialization */