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From 5d99868cb5063852ccfe8d0e9f249baded91dc4c Mon Sep 17 00:00:00 2001
From: Murton Liu <murton.liu@amd.com>
Date: Wed, 19 Sep 2018 14:31:12 -0400
Subject: [PATCH 5498/5725] drm/amd/display: HLK Periodic Frame Notification
test failed
[Why]
Due to a small pre-fetch window, the active vline timing is a couple
of lines off when compared to what it should be.
[How]
Changed the calculation for the start vline to account for this window.
Signed-off-by: Murton Liu <murton.liu@amd.com>
Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
---
drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c
index ad46294..5462668 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c
@@ -150,7 +150,7 @@ void optc1_program_vline_interrupt(
req_delta_lines--;
if (req_delta_lines > vsync_line)
- start_line = dc_crtc_timing->v_total - (req_delta_lines - vsync_line) - 1;
+ start_line = dc_crtc_timing->v_total - (req_delta_lines - vsync_line) + 2;
else
start_line = vsync_line - req_delta_lines;
--
2.7.4
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