On 26/12/2019 19:46, Matt Roper wrote:
The workaround database now indicates we need to disable psdunit clock
gating as well.
Bspec: 32354
Bspec: 33450
Bspec: 33451
Suggested-by: Lionel Landwerlin <lionel.g.landwerlin@xxxxxxxxx>
Cc: Lionel Landwerlin <lionel.g.landwerlin@xxxxxxxxx>
Cc: Lucas De Marchi <lucas.demarchi@xxxxxxxxx>
Cc: Matt Atwood <matthew.s.atwood@xxxxxxxxx>
Signed-off-by: Matt Roper <matthew.d.roper@xxxxxxxxx>
Acked-by: Lionel Landwerlin <lionel.g.landwerlin@xxxxxxxxx>
I have the same question about applying this to stable kernels with ICL
support :)
-Lionel
---
drivers/gpu/drm/i915/i915_reg.h | 3 +++
drivers/gpu/drm/i915/intel_pm.c | 4 ++++
2 files changed, 7 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index bbfedeb00b7f..b98734378c9a 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -4179,6 +4179,9 @@ enum {
#define UNSLICE_UNIT_LEVEL_CLKGATE _MMIO(0x9434)
#define VFUNIT_CLKGATE_DIS (1 << 20)
+#define UNSLICE_UNIT_LEVEL_CLKGATE2 _MMIO(0x94e4)
+#define PSDUNIT_CLKGATE_DIS REG_BIT(5)
+
#define INF_UNIT_LEVEL_CLKGATE _MMIO(0x9560)
#define CGPSF_CLKGATE_DIS (1 << 3)
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 31ec82337e4f..8bc8f0836368 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -6590,6 +6590,10 @@ static void icl_init_clock_gating(struct drm_i915_private *dev_priv)
/* WaEnable32PlaneMode:icl */
I915_WRITE(GEN9_CSFE_CHICKEN1_RCS,
_MASKED_BIT_ENABLE(GEN11_ENABLE_32_PLANE_MODE));
+
+ /* Wa_1407352427:icl,ehl */
+ intel_uncore_rmw(&dev_priv->uncore, UNSLICE_UNIT_LEVEL_CLKGATE2,
+ 0, PSDUNIT_CLKGATE_DIS);
}
static void tgl_init_clock_gating(struct drm_i915_private *dev_priv)
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