drm/i915/dg2: Add workaround 18019627453

A new DG2 workaround added to fix some corner cases hangs.

v2:
- implementing the second and preferred option for this workaround

BSpec: 54077
BSpec: 68173
BSpec: 71488
Cc: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220419182753.364237-2-jose.souza@intel.com

drivers/gpu/drm/i915/gt/intel_workarounds.c

@@ -2194,11 +2194,15 @@ rcs_engine_wa_init(struct intel_engine_cs *engine, struct i915_wa_list *wal)
 		 */
 		wa_write_or(wal, GEN7_FF_THREAD_MODE,
 			    GEN12_FF_TESSELATION_DOP_GATE_DISABLE);
+	}
 
+	if (IS_ALDERLAKE_P(i915) || IS_DG2(i915) || IS_ALDERLAKE_S(i915) ||
+	    IS_DG1(i915) || IS_ROCKETLAKE(i915) || IS_TIGERLAKE(i915)) {
 		/*
 		 * Wa_1606700617:tgl,dg1,adl-p
 		 * Wa_22010271021:tgl,rkl,dg1,adl-s,adl-p
 		 * Wa_14010826681:tgl,dg1,rkl,adl-p
+		 * Wa_18019627453:dg2
 		 */
 		wa_masked_en(wal,
 			     GEN9_CS_DEBUG_MODE1,