drm/amd/powerplay: enable power down asic task. (v2)

BugLink: http://bugs.launchpad.net/bugs/1546572

v2: AGD: rebase on upstream
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>
(cherry picked from commit e1d32e60)
Signed-off-by: Alberto Milone <alberto.milone@canonical.com>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>

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

@@ -68,8 +68,7 @@ int pem_task_adjust_power_state(struct pp_eventmgr *eventmgr, struct pem_event_d
 
 int pem_task_power_down_asic(struct pp_eventmgr *eventmgr, struct pem_event_data *event_data)
 {
-	/* TODO */
-	return 0;
+	return phm_power_down_asic(eventmgr->hwmgr);
 }
 
 int pem_task_set_boot_state(struct pp_eventmgr *eventmgr, struct pem_event_data *event_data)

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

@@ -90,6 +90,22 @@ int phm_setup_asic(struct pp_hwmgr *hwmgr)
 	return 0;
 }
 
+int phm_power_down_asic(struct pp_hwmgr *hwmgr)
+{
+	PHM_FUNC_CHECK(hwmgr);
+
+	if (phm_cap_enabled(hwmgr->platform_descriptor.platformCaps,
+		PHM_PlatformCaps_TablelessHardwareInterface)) {
+		if (NULL != hwmgr->hwmgr_func->power_off_asic)
+			return hwmgr->hwmgr_func->power_off_asic(hwmgr);
+	} else {
+		return phm_dispatch_table(hwmgr, &(hwmgr->power_down_asic),
+					  NULL, NULL);
+	}
+
+	return 0;
+}
+
 int phm_set_power_state(struct pp_hwmgr *hwmgr,
 		    const struct pp_hw_power_state *pcurrent_state,
 		    const struct pp_hw_power_state *pnew_power_state)
@@ -247,7 +263,6 @@ int phm_register_thermal_interrupt(struct pp_hwmgr *hwmgr, const void *info)
 */
 int phm_start_thermal_controller(struct pp_hwmgr *hwmgr, struct PP_TemperatureRange *temperature_range)
 {
-
 	return phm_dispatch_table(hwmgr, &(hwmgr->start_thermal_controller), temperature_range, NULL);
 }
 

drivers/gpu/drm/amd/powerplay/inc/hardwaremanager.h

@@ -379,5 +379,7 @@ extern int phm_get_dal_power_level(struct pp_hwmgr *hwmgr,
 
 extern int phm_set_cpu_power_state(struct pp_hwmgr *hwmgr);
 
+extern int phm_power_down_asic(struct pp_hwmgr *hwmgr);
+
 #endif /* _HARDWARE_MANAGER_H_ */
 

drivers/gpu/drm/amd/powerplay/inc/hwmgr.h

@@ -326,7 +326,8 @@ struct pp_hwmgr_func {
 				bool cc6_disable, bool pstate_disable,
 				bool pstate_switch_disable);
 	int (*get_dal_power_level)(struct pp_hwmgr *hwmgr,
-			struct amd_pp_dal_clock_info*info);
+				   struct amd_pp_dal_clock_info *info);
+	int (*power_off_asic)(struct pp_hwmgr *hwmgr);
 };
 
 struct pp_table_func {
@@ -577,9 +578,10 @@ struct pp_hwmgr {
 	void *pptable;
 	struct phm_platform_descriptor platform_descriptor;
 	void *backend;
-	enum PP_DAL_POWERLEVEL	dal_power_level;
+	enum PP_DAL_POWERLEVEL dal_power_level;
 	struct phm_dynamic_state_info dyn_state;
 	struct phm_runtime_table_header setup_asic;
+	struct phm_runtime_table_header power_down_asic;
 	struct phm_runtime_table_header disable_dynamic_state_management;
 	struct phm_runtime_table_header enable_dynamic_state_management;
 	struct phm_runtime_table_header set_power_state;