Disable CGPSF unit clock gating to prevent an issue.
v2: Rebased on top of the WA refactoring
v3: Added References (Mika)
v4:
- Rebased
- C, not lisp (Chris)
- Remove unintentional whitespaces (Mika)
- Fixed in C0 (Mika)
References: HSDES#1406838659
Signed-off-by: Oscar Mateo <oscar.ma...@intel.com>
Reviewed-by: Mika Kuoppala <mika.kuopp...@linux.intel.com>
---
drivers/gpu/drm/i915/i915_reg.h | 3 +++
drivers/gpu/drm/i915/intel_workarounds.c | 6 ++++++
2 files changed, 9 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 7cb2ddc..ce48427 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -3848,6 +3848,9 @@ enum {
#define UNSLICE_UNIT_LEVEL_CLKGATE _MMIO(0x9434)
#define VFUNIT_CLKGATE_DIS (1 << 20)
+#define INF_UNIT_LEVEL_CLKGATE _MMIO(0x9560)
+#define CGPSF_CLKGATE_DIS (1 << 3)
+
/*
* Display engine regs
*/
diff --git a/drivers/gpu/drm/i915/intel_workarounds.c
b/drivers/gpu/drm/i915/intel_workarounds.c
index 2a4e3ee..942d322 100644
--- a/drivers/gpu/drm/i915/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/intel_workarounds.c
@@ -755,6 +755,12 @@ static void icl_gt_workarounds_apply(struct
drm_i915_private *dev_priv)
I915_WRITE(GEN10_L3_CHICKEN_MODE_REGISTER,
I915_READ(GEN10_L3_CHICKEN_MODE_REGISTER) |
GEN11_I2M_WRITE_DISABLE);
+
+ /* Wa_1406838659:icl (pre-prod) */
+ if (IS_ICL_REVID(dev_priv, ICL_REVID_A0, ICL_REVID_B0))
+ I915_WRITE(INF_UNIT_LEVEL_CLKGATE,
+ I915_READ(INF_UNIT_LEVEL_CLKGATE) |
+ CGPSF_CLKGATE_DIS);
}
void intel_gt_workarounds_apply(struct drm_i915_private *dev_priv)
--
1.9.1
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