drm/i915/xelp: Implement Wa_1606376872

Wa_1606376872 applies to all Xe_LP IPs except DG1.
Signed-off-by: Gustavo Sousa <gustavo.sousa@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230307032238.300674-1-gustavo.sousa@intel.com

drivers/gpu/drm/i915/gt/intel_gt_regs.h

@@ -480,6 +480,9 @@
 #define   HDC_FORCE_NON_COHERENT		(1 << 4)
 #define   HDC_BARRIER_PERFORMANCE_DISABLE	(1 << 10)
 
+#define COMMON_SLICE_CHICKEN4			_MMIO(0x7300)
+#define   DISABLE_TDC_LOAD_BALANCING_CALC	REG_BIT(6)
+
 #define GEN8_HDC_CHICKEN1			_MMIO(0x7304)
 
 #define GEN11_COMMON_SLICE_CHICKEN3		_MMIO(0x7304)

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

@@ -743,9 +743,13 @@ static void gen12_ctx_workarounds_init(struct intel_engine_cs *engine,
 	       FF_MODE2_GS_TIMER_224,
 	       0, false);
 
-	if (!IS_DG1(i915))
+	if (!IS_DG1(i915)) {
 		/* Wa_1806527549 */
 		wa_masked_en(wal, HIZ_CHICKEN, HZ_DEPTH_TEST_LE_GE_OPT_DISABLE);
+
+		/* Wa_1606376872 */
+		wa_masked_en(wal, COMMON_SLICE_CHICKEN4, DISABLE_TDC_LOAD_BALANCING_CALC);
+	}
 }
 
 static void dg1_ctx_workarounds_init(struct intel_engine_cs *engine,