[Intel-gfx] [PATCH 02/22] drm/i915/icl: WaGAPZPriorityScheme

[Oscar Mateo]

The default GAPZ arbitrer priority value at power-on has been found
to be incorrect.

v2: Now renamed to Wa_1405543622

Cc: Mika Kuoppala <mika.kuoppala at linux.intel.com>
Signed-off-by: Oscar Mateo <oscar.mateo at intel.com>
---
 drivers/gpu/drm/i915/i915_reg.h | 5 +++--
 drivers/gpu/drm/i915/intel_pm.c | 6 ++++++
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 6cd2f2a..cd5da2b 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -8196,8 +8196,9 @@ enum {
 #define   GEN8_DOP_CLOCK_GATE_GUC_ENABLE	(1<<4)
 #define   GEN8_DOP_CLOCK_GATE_MEDIA_ENABLE     (1<<6)
 
-#define GEN8_GARBCNTL                   _MMIO(0xB004)
-#define   GEN9_GAPS_TSV_CREDIT_DISABLE  (1<<7)
+#define GEN8_GARBCNTL				_MMIO(0xB004)
+#define   GEN9_GAPS_TSV_CREDIT_DISABLE		(1 << 7)
+#define   GEN11_ARBITRATION_PRIO_ORDER_MASK	(0x3f << 22)
 
 /* IVYBRIDGE DPF */
 #define GEN7_L3CDERRST1(slice)		_MMIO(0xB008 + (slice) * 0x200) /* L3CD Error Status 1 */
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 4f4c7ae..d1b98ae 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -8512,6 +8512,12 @@ static void icl_init_clock_gating(struct drm_i915_private *dev_priv)
 	/* WaPipelineFlushCoherentLines:icl */
 	I915_WRITE(GEN8_L3SQCREG4, (I915_READ(GEN8_L3SQCREG4) |
 				    GEN8_LQSC_FLUSH_COHERENT_LINES));
+
+	/* Wa_1405543622:icl
+	 * Formerly known as WaGAPZPriorityScheme
+	 */
+	I915_WRITE(GEN8_GARBCNTL, (I915_READ(GEN8_GARBCNTL) |
+				   GEN11_ARBITRATION_PRIO_ORDER_MASK));
 }
 
 static void cnl_init_clock_gating(struct drm_i915_private *dev_priv)
-- 
1.9.1