From: Yongqiang Sun <yongqiang.sun@amd.com>
Date: Mon, 21 Aug 2017 15:00:25 +0000 (-0400)
Subject: drm/amd/display: Enable double buffer when unblank crtc.
X-Git-Tag: v4.15-rc1~56^2~23^2~144
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=4d1501eb65d606c05f28da12539cf0defd111f75;p=users%2Fwilly%2Flinux.git

drm/amd/display: Enable double buffer when unblank crtc.

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>
---

diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_timing_generator.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_timing_generator.c
index 6a5f2683c2e5..cc58f43400d7 100644
--- 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 timing_generator *tg)
 {
 	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);