--- nouveau_reg.h.orig	2016-08-04 21:00:01.894686626 -0400
+++ nouveau_reg.h	2016-08-04 20:55:27.105749256 -0400
@@ -856,3 +856,9 @@
 #define NV50_PDISPLAY_CURSOR_USER                                    0x00647000
 #define NV50_PDISPLAY_CURSOR_USER_POS_CTRL(i)        ((i) * 0x1000 + 0x00647080)
 #define NV50_PDISPLAY_CURSOR_USER_POS(i)             ((i) * 0x1000 + 0x00647084)
+
+
+#ifdef __powerpc__
+#define NV30_PMC_BACKLIGHT             				0x000010f0
+#define NV30_PMC_BACKLIGHT_MASK        				0X0fff0000
+#endif