From: Rex Zhu <Rex.Zhu@amd.com>
Date: Wed, 13 Jun 2018 18:53:49 +0800
Subject: drm/amd/pp: Make sure clock_voltage_limit_table on dc is valid
Git-commit: e1fa921f022d2401f3e3328ebf0c2ded84d4924a
Patch-mainline: v4.19-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

if vbios not set the max clock voltage limit table for DC mode,
Set the table as sama as the table for AC mode.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c |    5 +++++
 1 file changed, 5 insertions(+)

--- a/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c
@@ -236,6 +236,11 @@ int hwmgr_hw_init(struct pp_hwmgr *hwmgr
 	ret = hwmgr->hwmgr_func->backend_init(hwmgr);
 	if (ret)
 		goto err1;
+ /* make sure dc limits are valid */
+	if ((hwmgr->dyn_state.max_clock_voltage_on_dc.sclk == 0) ||
+			(hwmgr->dyn_state.max_clock_voltage_on_dc.mclk == 0))
+			hwmgr->dyn_state.max_clock_voltage_on_dc =
+					hwmgr->dyn_state.max_clock_voltage_on_ac;
 
 	ret = psm_init_power_state_table(hwmgr);
 	if (ret)