drm/amdgpu/powerplay: implement pem_task for display_configuration_change

Add support for display configuration changes to the event manager.
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Reviewed-by: Jammy Zhou <Jammy.Zhou@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -152,7 +152,7 @@ const pem_event_action set_boot_state_tasks[] = {
 const pem_event_action adjust_power_state_tasks[] = {
 	pem_task_notify_hw_mgr_display_configuration_change,
 	pem_task_adjust_power_state,
-	/*pem_task_notify_smc_display_config_after_power_state_adjustment,*/
+	pem_task_notify_smc_display_config_after_power_state_adjustment,
 	pem_task_update_allowed_performance_levels,
 	/* to do pem_task_Enable_disable_bapm, */
 	NULL

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

@@ -189,16 +189,25 @@ int pem_task_store_dal_configuration(struct pp_eventmgr *eventmgr, const struct
 
 int pem_task_notify_hw_mgr_display_configuration_change(struct pp_eventmgr *eventmgr, struct pem_event_data *event_data)
 {
-	/* TODO */
-	return 0;
+	if (pem_is_hw_access_blocked(eventmgr))
+		return 0;
+
+	return phm_display_configuration_changed(eventmgr->hwmgr);
 }
 
 int pem_task_notify_hw_mgr_pre_display_configuration_change(struct pp_eventmgr *eventmgr, struct pem_event_data *event_data)
 {
-	/* TODO */
 	return 0;
 }
 
+int pem_task_notify_smc_display_config_after_power_state_adjustment(struct pp_eventmgr *eventmgr, struct pem_event_data *event_data)
+{
+	if (pem_is_hw_access_blocked(eventmgr))
+		return 0;
+
+	return phm_notify_smc_display_config_after_ps_adjustment(eventmgr->hwmgr);
+}
+
 int pem_task_block_adjust_power_state(struct pp_eventmgr *eventmgr, struct pem_event_data *event_data)
 {
 	eventmgr->block_adjust_power_state = true;

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

@@ -57,7 +57,7 @@ int pem_task_block_hw_access(struct pp_eventmgr *eventmgr, struct pem_event_data
 int pem_task_un_block_hw_access(struct pp_eventmgr *eventmgr, struct pem_event_data *event_data);
 int pem_task_reset_display_phys_access(struct pp_eventmgr *eventmgr, struct pem_event_data *event_data);
 int pem_task_set_cpu_power_state(struct pp_eventmgr *eventmgr, struct pem_event_data *event_data);
-
+int pem_task_notify_smc_display_config_after_power_state_adjustment(struct pp_eventmgr *eventmgr, struct pem_event_data *event_data);
 /*powersaving*/
 
 int pem_task_set_power_source(struct pp_eventmgr *eventmgr, struct pem_event_data *event_data);

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

@@ -97,7 +97,7 @@ int psm_adjust_power_state_dynamic(struct pp_eventmgr *eventmgr, bool skip)
 	pcurrent = hwmgr->current_ps;
 	requested = hwmgr->request_ps;
 
-	if (pcurrent != NULL || requested != NULL) {
+	if ((pcurrent != NULL || requested != NULL) && (pcurrent != requested)) {
 		phm_apply_state_adjust_rules(hwmgr, requested, pcurrent);
 		phm_set_power_state(hwmgr, &pcurrent->hardware, &requested->hardware);
 		hwmgr->current_ps = requested;