diff -upr6 drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c /home/player/linux-fixes/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c
--- drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c	2019-10-29 19:29:41.344868109 +0100
+++ linux-fixes/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c	2019-11-06 10:59:20.305003664 +0100
@@ -3842,12 +3849,15 @@ static int vega10_read_sensor(struct pp_
 static void vega10_notify_smc_display_change(struct pp_hwmgr *hwmgr,
 		bool has_disp)
 {
 	smum_send_msg_to_smc_with_parameter(hwmgr,
 			PPSMC_MSG_SetUclkFastSwitch,
 			has_disp ? 1 : 0);
+
+	/* proposed fix for crashes because of frequently mclk level 0/1 switching */
+	smum_send_msg_to_smc_with_parameter(hwmgr, PPSMC_MSG_SetUclkDownHyst, 1);
 }
 
 int vega10_display_clock_voltage_request(struct pp_hwmgr *hwmgr,
 		struct pp_display_clock_request *clock_req)
 {
 	int result = 0;