diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index 0999c8eaae94a..ae35c102a487e 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -2476,6 +2476,11 @@ void r100_io_wreg(struct radeon_device *rdev, u32 reg, u32 v);
 u32 cik_mm_rdoorbell(struct radeon_device *rdev, u32 index);
 void cik_mm_wdoorbell(struct radeon_device *rdev, u32 index, u32 v);
 
+static inline struct drm_device *rdev_to_drm(struct radeon_device *rdev)
+{
+	return rdev->ddev;
+}
+
 /*
  * Cast helper
  */