[Intel-gfx] [PATCH 1/2] drm/i915/dg2: Add workaround 18019627453

[José Roberto de Souza]

A new DG2 workaround added to some corner cases hangs.

BSpec: 54077
BSpec: 68173
BSpec: 71488
Cc: Matt Roper <matthew.d.roper at intel.com>
Signed-off-by: José Roberto de Souza <jose.souza at intel.com>
---
 drivers/gpu/drm/i915/gt/intel_gt_regs.h     | 1 +
 drivers/gpu/drm/i915/gt/intel_workarounds.c | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/i915/gt/intel_gt_regs.h b/drivers/gpu/drm/i915/gt/intel_gt_regs.h
index 0a5c2648aaf07..10db058d9038c 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt_regs.h
+++ b/drivers/gpu/drm/i915/gt/intel_gt_regs.h
@@ -368,6 +368,7 @@
 #define   GEN9_FACTOR_IN_CLR_VAL_HIZ		(1 << 9)
 
 #define VFLSKPD					_MMIO(0x62a8)
+#define   VF_PREFETCH_TLB_DIS			REG_BIT(5)
 #define   DIS_OVER_FETCH_CACHE			REG_BIT(1)
 #define   DIS_MULT_MISS_RD_SQUASH		REG_BIT(0)
 
diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c
index 29c8cd0a81b6f..a1ba775bcb705 100644
--- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
@@ -688,6 +688,9 @@ static void dg2_ctx_workarounds_init(struct intel_engine_cs *engine,
 	if (IS_DG2_GRAPHICS_STEP(engine->i915, G10, STEP_B0, STEP_FOREVER) ||
 		IS_DG2_G11(engine->i915) || IS_DG2_G12(engine->i915))
 		wa_masked_field_set(wal, VF_PREEMPTION, PREEMPTION_VERTEX_COUNT, 0x4000);
+
+	/* Wa_18019627453:dg2 */
+	wa_masked_en(wal, VFLSKPD, VF_PREFETCH_TLB_DIS);
 }
 
 static void fakewa_disable_nestedbb_mode(struct intel_engine_cs *engine,
-- 
2.35.3