From: Hugo Hu <hugo.hu@amd.com>
Date: Mon, 18 Jun 2018 15:27:58 -0400
Subject: drm/amd/display: Correct calculation of duration time.
Git-commit: 93ed1814c668fb13f3b23b629528e90a2b0d5ea3
Patch-mainline: v4.19-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

Signed-off-by: Hugo Hu <hugo.hu@amd.com>
Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
+++ b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
@@ -864,10 +864,10 @@ void hwss_edp_power_control(
 		if (power_up) {
 			unsigned long long current_ts = dm_get_timestamp(ctx);
 			unsigned long long duration_in_ms =
-					dm_get_elapse_time_in_ns(
+					div64_u64(dm_get_elapse_time_in_ns(
 							ctx,
 							current_ts,
-							div64_u64(link->link_trace.time_stamp.edp_poweroff, 1000000));
+							link->link_trace.time_stamp.edp_poweroff), 1000000);
 			unsigned long long wait_time_ms = 0;
 
 			/* max 500ms from LCDVDD off to on */