drm/amd/powerplay: disable cg pg task when pp uninitialize.

fix bug on uvd pg enabled, when reboot vm in pass through case,
we need to notify smu power up uvd/vce if they were power down.
otherwise, the vbios post will fail.
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

@@ -154,7 +154,7 @@ int pem_task_powerdown_vce_tasks(struct pp_eventmgr *eventmgr, struct pem_event_
 
 int pem_task_disable_clock_power_gatings_tasks(struct pp_eventmgr *eventmgr, struct pem_event_data *event_data)
 {
-	/* TODO */
+	phm_disable_clock_power_gatings(eventmgr->hwmgr);
 	return 0;
 }
 

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

@@ -209,6 +209,19 @@ int phm_enable_clock_power_gatings(struct pp_hwmgr *hwmgr)
 	return 0;
 }
 
+int phm_disable_clock_power_gatings(struct pp_hwmgr *hwmgr)
+{
+	PHM_FUNC_CHECK(hwmgr);
+
+	if (phm_cap_enabled(hwmgr->platform_descriptor.platformCaps,
+		PHM_PlatformCaps_TablelessHardwareInterface)) {
+		if (NULL != hwmgr->hwmgr_func->disable_clock_power_gating)
+			return hwmgr->hwmgr_func->disable_clock_power_gating(hwmgr);
+	}
+	return 0;
+}
+
+
 int phm_display_configuration_changed(struct pp_hwmgr *hwmgr)
 {
 	PHM_FUNC_CHECK(hwmgr);

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

@@ -334,6 +334,7 @@ struct phm_clocks {
 	uint32_t clock[MAX_NUM_CLOCKS];
 };
 
+extern int phm_disable_clock_power_gatings(struct pp_hwmgr *hwmgr);
 extern int phm_enable_clock_power_gatings(struct pp_hwmgr *hwmgr);
 extern int phm_powergate_uvd(struct pp_hwmgr *hwmgr, bool gate);
 extern int phm_powergate_vce(struct pp_hwmgr *hwmgr, bool gate);