--- zzzz-none-000/linux-3.10.107/drivers/gpu/drm/radeon/r520.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/gpu/drm/radeon/r520.c	2021-02-04 17:41:59.000000000 +0000
@@ -312,6 +312,9 @@
 		return r;
 	rv515_set_safe_registers(rdev);
 
+	/* Initialize power management */
+	radeon_pm_init(rdev);
+
 	rdev->accel_working = true;
 	r = r520_startup(rdev);
 	if (r) {