drm/i915: Extract intel_memory_type_is_local()

Extract the "is this memory region local?" check into a helper.
I'll have another use for this in the BIOS FB takeover.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250313140838.29742-2-ville.syrjala@linux.intel.com
Reviewed-by: Jouni Högander <jouni.hogander@intel.com>

drivers/gpu/drm/i915/gem/i915_gem_lmem.c

@@ -48,8 +48,7 @@ bool i915_gem_object_is_lmem(struct drm_i915_gem_object *obj)
 	    i915_gem_object_evictable(obj))
 		assert_object_held(obj);
 #endif
-	return mr && (mr->type == INTEL_MEMORY_LOCAL ||
-		      mr->type == INTEL_MEMORY_STOLEN_LOCAL);
+	return mr && intel_memory_type_is_local(mr->type);
 }
 
 /**

drivers/gpu/drm/i915/intel_memory_region.c

@@ -171,6 +171,17 @@ intel_memory_region_by_type(struct drm_i915_private *i915,
 	return NULL;
 }
 
+bool intel_memory_type_is_local(enum intel_memory_type mem_type)
+{
+	switch (mem_type) {
+	case INTEL_MEMORY_LOCAL:
+	case INTEL_MEMORY_STOLEN_LOCAL:
+		return true;
+	default:
+		return false;
+	}
+}
+
 /**
  * intel_memory_region_reserve - Reserve a memory range
  * @mem: The region for which we want to reserve a range.

drivers/gpu/drm/i915/intel_memory_region.h

@@ -85,6 +85,8 @@ struct intel_memory_region {
 	void *region_private;
 };
 
+bool intel_memory_type_is_local(enum intel_memory_type mem_type);
+
 struct intel_memory_region *
 intel_memory_region_lookup(struct drm_i915_private *i915,
 			   u16 class, u16 instance);