From: Yongqiang Sun <yongqiang.sun@amd.com>
Date: Mon, 21 Aug 2017 11:00:25 -0400
Subject: drm/amd/display: Enable double buffer when unblank crtc.
Git-commit: 4d1501eb65d606c05f28da12539cf0defd111f75
Patch-mainline: v4.15-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
Signed-off-by: Yongqiang Sun <yongqiang.sun@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@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/dcn10/dcn10_timing_generator.c | 3 +++
1 file changed, 3 insertions(+)
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_timing_generator.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_timing_generator.c
@@ -289,6 +289,9 @@ static void tgn10_unblank_crtc(struct ti
{
struct dcn10_timing_generator *tgn10 = DCN10TG_FROM_TG(tg);
+ REG_UPDATE(OTG_DOUBLE_BUFFER_CONTROL,
+ OTG_BLANK_DATA_DOUBLE_BUFFER_EN, 1);
+
REG_UPDATE_2(OTG_BLANK_CONTROL,
OTG_BLANK_DATA_EN, 0,
OTG_BLANK_DE_MODE, 0);