--- a/drivers/gpu/drm/i915/intel_opregion.c	2016-09-30 12:00:21.676706800 +0300
+++ b/drivers/gpu/drm/i915/intel_opregion.c	2016-09-30 11:59:24.686736446 +0300
@@ -1027,6 +1027,13 @@
 			    DMI_MATCH(DMI_PRODUCT_NAME, "IX45GM2"),
 		},
 	},
+	{
+		.callback = intel_use_opregion_panel_type_callback,
+		.ident = "Lenovo ThinkPad L440",
+		.matches = {DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+			    DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad L440"),
+		},
+	},
 	{ }
 };