--- zzzz-none-000/linux-3.10.107/drivers/usb/host/imx21-dbg.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/usb/host/imx21-dbg.c	2021-02-04 17:41:59.000000000 +0000
@@ -18,6 +18,10 @@
 
 /* this file is part of imx21-hcd.c */
 
+#ifdef CONFIG_DYNAMIC_DEBUG
+#define DEBUG
+#endif
+
 #ifndef DEBUG
 
 static inline void create_debug_files(struct imx21 *imx21) { }