drm/amd/powerplay: add voltage change support through pp_table

Disable avfs to make voltage change take effect.
Signed-off-by: Eric Huang <JinHuiEric.Huang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -750,7 +750,17 @@ static int pp_dpm_set_pp_table(void *handle, const char *buf, size_t size)
 
 	hwmgr->soft_pp_table = hwmgr->hardcode_pp_table;
 
-	return amd_powerplay_reset(handle);
+	ret = amd_powerplay_reset(handle);
+	if (ret)
+		return ret;
+
+	if (hwmgr->hwmgr_func->avfs_control) {
+		ret = hwmgr->hwmgr_func->avfs_control(hwmgr, false);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
 }
 
 static int pp_dpm_force_clock_level(void *handle,

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

@@ -360,6 +360,7 @@ struct pp_hwmgr_func {
 	int (*release_firmware)(struct pp_hwmgr *hwmgr);
 	int (*set_power_profile_state)(struct pp_hwmgr *hwmgr,
 			struct amd_pp_profile *request);
+	int (*avfs_control)(struct pp_hwmgr *hwmgr, bool enable);
 };
 
 struct pp_table_func {