Disable I2M Write for performance reasons.

v2: Rebased on top of the WA refactoring

Cc: Mika Kuoppala <mika.kuopp...@linux.intel.com>
Signed-off-by: Oscar Mateo <oscar.ma...@intel.com>
---
 drivers/gpu/drm/i915/i915_reg.h          | 4 +++-
 drivers/gpu/drm/i915/intel_workarounds.c | 5 +++++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 9ab5731..b462938 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -7192,7 +7192,9 @@ enum {
 #define GEN7_L3CNTLREG3                                _MMIO(0xB024)
 
 #define GEN7_L3_CHICKEN_MODE_REGISTER          _MMIO(0xB030)
-#define  GEN7_WA_L3_CHICKEN_MODE                               0x20000000
+#define GEN10_L3_CHICKEN_MODE_REGISTER         _MMIO(0xB114)
+#define  GEN7_WA_L3_CHICKEN_MODE               0x20000000
+#define  GEN11_I2M_WRITE_DISABLE               (1 << 28)
 
 #define GEN7_L3SQCREG4                         _MMIO(0xb034)
 #define  L3SQ_URB_READ_CAM_MATCH_DISABLE       (1<<27)
diff --git a/drivers/gpu/drm/i915/intel_workarounds.c 
b/drivers/gpu/drm/i915/intel_workarounds.c
index 57a69aa..0cebafa 100644
--- a/drivers/gpu/drm/i915/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/intel_workarounds.c
@@ -757,6 +757,11 @@ static void icl_gt_workarounds_apply(struct 
drm_i915_private *dev_priv)
        I915_WRITE(SUBSLICE_UNIT_LEVEL_CLKGATE,
                   (I915_READ(SUBSLICE_UNIT_LEVEL_CLKGATE) |
                    GWUNIT_CLKGATE_DIS));
+
+       /* Wa_1604302699:icl */
+       I915_WRITE(GEN10_L3_CHICKEN_MODE_REGISTER,
+                  (I915_READ(GEN10_L3_CHICKEN_MODE_REGISTER) |
+                   GEN11_I2M_WRITE_DISABLE));
 }
 
 void intel_gt_workarounds_apply(struct drm_i915_private *dev_priv)
-- 
1.9.1

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

Reply via email to