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drm/i915: implement WaForceL3Serialization on VLV and IVB 

References: https://bugs.freedesktop.org/show_bug.cgi?id=50250
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Jesse Barnes 2012-10-02 17:43:38 -05:00 committed by Daniel Vetter
parent ff1f525ef4
commit 61939d977d
2 changed files with 11 additions and 0 deletions
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3
drivers/gpu/drm/i915/i915_reg.h
View File

@ -3448,6 +3448,9 @@
#define GEN7_L3_CHICKEN_MODE_REGISTER 0xB030
#define GEN7_WA_L3_CHICKEN_MODE 0x20000000
#define GEN7_L3SQCREG4 0xb034
#define L3SQ_URB_READ_CAM_MATCH_DISABLE (1<<27)
/* WaCatErrorRejectionIssue */
#define GEN7_SQ_CHICKEN_MBCUNIT_CONFIG 0x9030
#define GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB (1<<11)

8
drivers/gpu/drm/i915/intel_pm.c
View File

@ -3547,6 +3547,10 @@ static void ivybridge_init_clock_gating(struct drm_device *dev)
I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER,
GEN7_WA_L3_CHICKEN_MODE);
/* WaForceL3Serialization */
I915_WRITE(GEN7_L3SQCREG4, I915_READ(GEN7_L3SQCREG4) &
~L3SQ_URB_READ_CAM_MATCH_DISABLE);
/* According to the BSpec vol1g, bit 12 (RCPBUNIT) clock
* gating disable must be set. Failure to set it results in
* flickering pixels due to Z write ordering failures after
@ -3617,6 +3621,10 @@ static void valleyview_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);
/* WaForceL3Serialization */
I915_WRITE(GEN7_L3SQCREG4, I915_READ(GEN7_L3SQCREG4) &
~L3SQ_URB_READ_CAM_MATCH_DISABLE);
/* This is required by WaCatErrorRejectionIssue */
I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG,
I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG) |