[Intel-gfx] [PATCH] drm/i915/dg2: add Wa_14015023722

[clinton.a.taylor at intel.com]

From: Clint Taylor <clinton.a.taylor at intel.com>

BSPEC: 46123
Cc: Matt Roper <matthew.d.roper at intel.com>
Signed-off-by: Clint Taylor <clinton.a.taylor at intel.com>
---
 drivers/gpu/drm/i915/gt/intel_workarounds.c | 5 +++++
 drivers/gpu/drm/i915/i915_reg.h             | 4 ++++
 2 files changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c
index 6a4372c3a3c5..5cdacfa8aefc 100644
--- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
@@ -688,6 +688,11 @@ static void dg2_ctx_workarounds_init(struct intel_engine_cs *engine,
 	    IS_DG2_GRAPHICS_STEP(engine->i915, G11, STEP_A0, STEP_B0))
 		wa_masked_en(wal, GEN9_HALF_SLICE_CHICKEN7,
 			     DG2_DISABLE_ROUND_ENABLE_ALLOW_FOR_SSLA);
+
+	/* wa_14015023722: DG2 G11 [B0..NONE] */
+	if (IS_DG2_GRAPHICS_STEP(engine->i915, G11, STEP_B0, STEP_FOREVER))
+		wa_masked_en(wal, VF_PREEMPTION, PREEMPTION_VERTEX_4000);
+
 }
 
 static void fakewa_disable_nestedbb_mode(struct intel_engine_cs *engine,
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index ef6bc8180073..5805a45920b3 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -11934,4 +11934,8 @@ enum skl_power_gate {
 #define SLICE_COMMON_ECO_CHICKEN1		_MMIO(0x731C)
 #define   MSC_MSAA_REODER_BUF_BYPASS_DISABLE	REG_BIT(14)
 
+#define VF_PREEMPTION			_MMIO(0x83a4)
+#define  PREEMPTION_VERTEX_COUNT	REG_GENMASK(15, 0)
+#define  PREEMPTION_VERTEX_4000		REG_FIELD_PREP(PREEMPTION_VERTEX_COUNT, 0x4000)
+
 #endif /* _I915_REG_H_ */
-- 
2.34.1