Commit 61939d97 authored by Jesse Barnes's avatar Jesse Barnes Committed by Daniel Vetter

drm/i915: implement WaForceL3Serialization on VLV and IVB

References: https://bugs.freedesktop.org/show_bug.cgi?id=50250Signed-off-by: default avatarJesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent ff1f525e
...@@ -3448,6 +3448,9 @@ ...@@ -3448,6 +3448,9 @@
#define GEN7_L3_CHICKEN_MODE_REGISTER 0xB030 #define GEN7_L3_CHICKEN_MODE_REGISTER 0xB030
#define GEN7_WA_L3_CHICKEN_MODE 0x20000000 #define GEN7_WA_L3_CHICKEN_MODE 0x20000000
#define GEN7_L3SQCREG4 0xb034
#define L3SQ_URB_READ_CAM_MATCH_DISABLE (1<<27)
/* WaCatErrorRejectionIssue */ /* WaCatErrorRejectionIssue */
#define GEN7_SQ_CHICKEN_MBCUNIT_CONFIG 0x9030 #define GEN7_SQ_CHICKEN_MBCUNIT_CONFIG 0x9030
#define GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB (1<<11) #define GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB (1<<11)
......
...@@ -3547,6 +3547,10 @@ static void ivybridge_init_clock_gating(struct drm_device *dev) ...@@ -3547,6 +3547,10 @@ static void ivybridge_init_clock_gating(struct drm_device *dev)
I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER, I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER,
GEN7_WA_L3_CHICKEN_MODE); 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 /* According to the BSpec vol1g, bit 12 (RCPBUNIT) clock
* gating disable must be set. Failure to set it results in * gating disable must be set. Failure to set it results in
* flickering pixels due to Z write ordering failures after * flickering pixels due to Z write ordering failures after
...@@ -3617,6 +3621,10 @@ static void valleyview_init_clock_gating(struct drm_device *dev) ...@@ -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_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);
/* WaForceL3Serialization */
I915_WRITE(GEN7_L3SQCREG4, I915_READ(GEN7_L3SQCREG4) &
~L3SQ_URB_READ_CAM_MATCH_DISABLE);
/* This is required by WaCatErrorRejectionIssue */ /* This is required by WaCatErrorRejectionIssue */
I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG, I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG,
I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG) | I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG) |
......
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