[Intel-gfx] [PATCH v2] drm/i915/dg2: add Wa_14014947963

[clinton.a.taylor at intel.com]

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

BSPEC: 46123
v2: Address review feedback [MattR]
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             | 2 ++
 2 files changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c
index b146a393cd79..c6b78529d149 100644
--- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
@@ -689,6 +689,11 @@ 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_14014947963: DG2 G10 [B0..NONE] G11 [ALL] */
+	if (IS_DG2_GRAPHICS_STEP(engine->i915, G10, STEP_B0, STEP_FOREVER) ||
+		IS_DG2_G11(engine->i915))
+		wa_masked_field_set(wal, VF_PREEMPTION, PREEMPTION_VERTEX_COUNT, 0x4000);
 }
 
 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 87c92314ee26..bfbeebe57725 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -9928,4 +9928,6 @@ enum skl_power_gate {
 #define CLKGATE_DIS_MISC			_MMIO(0x46534)
 #define  CLKGATE_DIS_MISC_DMASC_GATING_DIS	REG_BIT(21)
 
+#define VF_PREEMPTION			_MMIO(0x83a4)
+#define  PREEMPTION_VERTEX_COUNT	REG_GENMASK(15, 0)
 #endif /* _I915_REG_H_ */
-- 
2.34.1