drm/amd/powerplay: fix bug dpm level unexpectly be reset to auto.

Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/powerplay/eventmgr/eventtasks.c

@@ -38,10 +38,13 @@
 int pem_task_update_allowed_performance_levels(struct pp_eventmgr *eventmgr, struct pem_event_data *event_data)
 {
 
+	if (eventmgr == NULL || eventmgr->hwmgr == NULL)
+		return -EINVAL;
+
 	if (pem_is_hw_access_blocked(eventmgr))
 		return 0;
 
-	phm_force_dpm_levels(eventmgr->hwmgr, AMD_DPM_FORCED_LEVEL_AUTO);
+	phm_force_dpm_levels(eventmgr->hwmgr, eventmgr->hwmgr->dpm_level);
 
 	return 0;
 }

drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c

@@ -69,7 +69,7 @@ int hwmgr_init(struct amd_pp_init *pp_init, struct pp_instance *handle)
 	hwmgr->usec_timeout = AMD_MAX_USEC_TIMEOUT;
 	hwmgr->power_source = PP_PowerSource_AC;
 	hwmgr->pp_table_version = PP_TABLE_V1;
-
+	hwmgr->dpm_level = AMD_DPM_FORCED_LEVEL_AUTO;
 	hwmgr_init_default_caps(hwmgr);
 	hwmgr_set_user_specify_caps(hwmgr);