drm/i915/mtl: Add workaround 14018778641

WA 18018781329 is applicable now across all MTL
steppings.

V2:
  - Remove IS_MTL check, code already running for MTL - Matt

Cc: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Tejas Upadhyay <tejas.upadhyay@intel.com>
Reviewed-by: Andrzej Hajda <andrzej.hajda@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Signed-off-by: Andi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230424101749.3719600-1-tejas.upadhyay@intel.com

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

@@ -1695,19 +1695,18 @@ pvc_gt_workarounds_init(struct intel_gt *gt, struct i915_wa_list *wal)
 static void
 xelpg_gt_workarounds_init(struct intel_gt *gt, struct i915_wa_list *wal)
 {
+	/* Wa_14018778641 / Wa_18018781329 */
+	wa_mcr_write_or(wal, RENDER_MOD_CTRL, FORCE_MISS_FTLB);
+	wa_mcr_write_or(wal, COMP_MOD_CTRL, FORCE_MISS_FTLB);
+
 	if (IS_MTL_GRAPHICS_STEP(gt->i915, M, STEP_A0, STEP_B0) ||
 	    IS_MTL_GRAPHICS_STEP(gt->i915, P, STEP_A0, STEP_B0)) {
 		/* Wa_14014830051 */
 		wa_mcr_write_clr(wal, SARB_CHICKEN1, COMP_CKN_IN);
 
-		/* Wa_18018781329 */
-		wa_mcr_write_or(wal, RENDER_MOD_CTRL, FORCE_MISS_FTLB);
-		wa_mcr_write_or(wal, COMP_MOD_CTRL, FORCE_MISS_FTLB);
-
 		/* Wa_14015795083 */
 		wa_write_clr(wal, GEN7_MISCCPCTL, GEN12_DOP_CLOCK_GATE_RENDER_ENABLE);
 	}
-
 	/*
 	 * Unlike older platforms, we no longer setup implicit steering here;
 	 * all MCR accesses are explicitly steered.
@@ -1718,17 +1717,16 @@ xelpg_gt_workarounds_init(struct intel_gt *gt, struct i915_wa_list *wal)
 static void
 xelpmp_gt_workarounds_init(struct intel_gt *gt, struct i915_wa_list *wal)
 {
-	if (IS_MTL_MEDIA_STEP(gt->i915, STEP_A0, STEP_B0)) {
-		/*
-		 * Wa_18018781329
-		 *
-		 * Note that although these registers are MCR on the primary
-		 * GT, the media GT's versions are regular singleton registers.
-		 */
-		wa_write_or(wal, XELPMP_GSC_MOD_CTRL, FORCE_MISS_FTLB);
-		wa_write_or(wal, XELPMP_VDBX_MOD_CTRL, FORCE_MISS_FTLB);
-		wa_write_or(wal, XELPMP_VEBX_MOD_CTRL, FORCE_MISS_FTLB);
-	}
+	/*
+	 * Wa_14018778641
+	 * Wa_18018781329
+	 *
+	 * Note that although these registers are MCR on the primary
+	 * GT, the media GT's versions are regular singleton registers.
+	 */
+	wa_write_or(wal, XELPMP_GSC_MOD_CTRL, FORCE_MISS_FTLB);
+	wa_write_or(wal, XELPMP_VDBX_MOD_CTRL, FORCE_MISS_FTLB);
+	wa_write_or(wal, XELPMP_VEBX_MOD_CTRL, FORCE_MISS_FTLB);
 
 	debug_dump_steering(gt);
 }