[Intel-gfx] [PATCH] drm/i915/tgl: Implement WAs 18011464164 and 22010931296

[José Roberto de Souza]

As today those 2 WAs have different implementation between TGL and DG1
WA pages but checking the HSD it is clear that DG1 implementation
should be used for both, also to do so is easier as we just need to
extend WA 1407928979 to B* stepping.

Both WAs are need to fix some possible render corruptions.

DG1 initial patches were not merged yet, as soon it is this WAs should
be applied to DG1 as well.

BSpec: 53508
BSpec: 52890
Cc: Lucas De Marchi <lucas.demarchi at intel.com>
Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
Signed-off-by: José Roberto de Souza <jose.souza at intel.com>
---
 drivers/gpu/drm/i915/gt/intel_workarounds.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c
index 2da366821dda..3d31b763d9c9 100644
--- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
@@ -1649,11 +1649,6 @@ rcs_engine_wa_init(struct intel_engine_cs *engine, struct i915_wa_list *wal)
 			    GEN7_SARCHKMD,
 			    GEN7_DISABLE_SAMPLER_PREFETCH);
 
-		/* Wa_1407928979:tgl */
-		wa_write_or(wal,
-			    GEN7_FF_THREAD_MODE,
-			    GEN12_FF_TESSELATION_DOP_GATE_DISABLE);
-
 		/* Wa_1408615072:tgl */
 		wa_write_or(wal, UNSLICE_UNIT_LEVEL_CLKGATE2,
 			    VSUNIT_CLKGATE_DIS_TGL);
@@ -1677,6 +1672,14 @@ rcs_engine_wa_init(struct intel_engine_cs *engine, struct i915_wa_list *wal)
 		 * Wa_14010229206:tgl
 		 */
 		wa_masked_en(wal, GEN9_ROW_CHICKEN4, GEN12_DISABLE_TDL_PUSH);
+
+		/*
+		 * Wa_1407928979:tgl A*
+		 * Wa_18011464164:tgl B0+
+		 * Wa_22010931296:tgl B0+
+		 */
+		wa_write_or(wal, GEN7_FF_THREAD_MODE,
+			    GEN12_FF_TESSELATION_DOP_GATE_DISABLE);
 	}
 
 	if (IS_GEN(i915, 11)) {
-- 
2.27.0