From: Oscar Mateo <oscar.mateo@intel.com>
Date: Tue, 8 May 2018 14:29:33 -0700
Subject: drm/i915/icl: Wa_1604302699
Git-commit: 5215eef35fcbbc8f9bd68adff90eb813e8c3b7cf
Patch-mainline: v4.18-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
Disable I2M Write for performance reasons.
v2: Rebased on top of the WA refactoring
v3: Added References (Mika)
v4:
- Rebased
- C, not lisp (Chris)
- GEN7 chicken bit in the wrong side of the fence (Mika)
- Use two spaces to align bit macros
References: HSDES#1604302699
Signed-off-by: Oscar Mateo <oscar.mateo@intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Signed-off-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1525814984-20039-12-git-send-email-oscar.mateo@intel.com
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/i915/i915_reg.h | 4 +++-
drivers/gpu/drm/i915/intel_workarounds.c | 5 +++++
2 files changed, 8 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -7227,7 +7227,9 @@ enum {
#define GEN7_L3CNTLREG3 _MMIO(0xB024)
#define GEN7_L3_CHICKEN_MODE_REGISTER _MMIO(0xB030)
-#define GEN7_WA_L3_CHICKEN_MODE 0x20000000
+#define GEN7_WA_L3_CHICKEN_MODE 0x20000000
+#define GEN10_L3_CHICKEN_MODE_REGISTER _MMIO(0xB114)
+#define GEN11_I2M_WRITE_DISABLE (1 << 28)
#define GEN7_L3SQCREG4 _MMIO(0xb034)
#define L3SQ_URB_READ_CAM_MATCH_DISABLE (1<<27)
--- a/drivers/gpu/drm/i915/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/intel_workarounds.c
@@ -750,6 +750,11 @@ static void icl_gt_workarounds_apply(str
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)