1 files changed, 13 insertions, 0 deletions

diff --git a/drivers/gpu/drm/drm_memory.c b/drivers/gpu/drm/drm_memory.c
index fc0ebd273ef8..7ca500b8c399 100644
--- a/drivers/gpu/drm/drm_memory.c
+++ b/drivers/gpu/drm/drm_memory.c
@@ -149,3 +149,16 @@ void drm_legacy_ioremapfree(struct drm_local_map *map, struct drm_device *dev)
                 iounmap(map->handle);
 }
 EXPORT_SYMBOL(drm_legacy_ioremapfree);
+
+u64 drm_get_max_iomem(void)
+{
+        struct resource *tmp;
+        u64 max_iomem = 0;
+
+        for (tmp = iomem_resource.child; tmp; tmp = tmp->sibling) {
+                max_iomem = max(max_iomem,  tmp->end);
+        }
+
+        return max_iomem;
+}
+EXPORT_SYMBOL(drm_get_max_iomem);