drm/i915/gt: Do not use stolen on MTL

Use smem on MTL due to a HW bug in MTL that prevents
reading from stolen memory using LMEM BAR.

Cc: Oak Zeng <[email protected]>
Cc: Jani Nikula <[email protected]>
Cc: Joonas Lahtinen <[email protected]>
Cc: Andi Shyti <[email protected]>
Cc: Andrzej Hajda <[email protected]>
Signed-off-by: Nirmoy Das <[email protected]>
Reviewed-by: Oak Zeng <[email protected]>
Reviewed-by: Andrzej Hajda <[email protected]>
Reviewed-by: Andi Shyti <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

Author: nirmoy

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

@@ -466,7 +466,7 @@ static int intel_gt_init_scratch(struct intel_gt *gt, unsigned int size)
 	obj = i915_gem_object_create_lmem(i915, size,
 					  I915_BO_ALLOC_VOLATILE |
 					  I915_BO_ALLOC_GPU_ONLY);
-	if (IS_ERR(obj))
+	if (IS_ERR(obj) && !IS_METEORLAKE(i915)) /* Wa_22018444074 */
 		obj = i915_gem_object_create_stolen(i915, size);
 	if (IS_ERR(obj))
 		obj = i915_gem_object_create_internal(i915, size);