References: https://bugs.freedesktop.org/show_bug.cgi?id=50233
Signed-off-by: Jesse Barnes <jbar...@virtuousgeek.org>
---
drivers/gpu/drm/i915/i915_reg.h | 1 +
drivers/gpu/drm/i915/intel_pm.c | 6 ++++--
2 files changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index a828e90..b89e5f5 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -3443,6 +3443,7 @@
#define GEN7_L3_CHICKEN_MODE_REGISTER 0xB030
#define GEN7_WA_L3_CHICKEN_MODE 0x20000000
+#define GEN7_WA_DOP_CLOCK_GATING_DISABLE 0x08000000
/* WaCatErrorRejectionIssue */
#define GEN7_SQ_CHICKEN_MBCUNIT_CONFIG 0x9030
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 36c6409..7ec4b28 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3541,7 +3541,8 @@ static void ivybridge_init_clock_gating(struct drm_device
*dev)
I915_WRITE(GEN7_L3CNTLREG1,
GEN7_WA_FOR_GEN7_L3_CONTROL);
I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER,
- GEN7_WA_L3_CHICKEN_MODE);
+ GEN7_WA_L3_CHICKEN_MODE |
+ GEN7_WA_DOP_CLOCK_GATING_DISABLE);
/* According to the BSpec vol1g, bit 12 (RCPBUNIT) clock
* gating disable must be set. Failure to set it results in
@@ -3611,7 +3612,8 @@ static void valleyview_init_clock_gating(struct
drm_device *dev)
/* WaApplyL3ControlAndL3ChickenMode requires those two on Ivy Bridge */
I915_WRITE(GEN7_L3CNTLREG1, GEN7_WA_FOR_GEN7_L3_CONTROL);
- I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER, GEN7_WA_L3_CHICKEN_MODE);
+ I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER, GEN7_WA_L3_CHICKEN_MODE |
+ GEN7_WA_DOP_CLOCK_GATING_DISABLE);
/* This is required by WaCatErrorRejectionIssue */
I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG,
--
1.7.9.5
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