v4.19.13 snapshot.
diff --git a/drivers/gpu/drm/selftests/Makefile b/drivers/gpu/drm/selftests/Makefile
new file mode 100644
index 0000000..9fc349f
--- /dev/null
+++ b/drivers/gpu/drm/selftests/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_DRM_DEBUG_SELFTEST) += test-drm_mm.o test-drm-helper.o