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From ff90d9ae73aebf86db14dfe520031dd4226f3293 Mon Sep 17 00:00:00 2001
From: Zhan liu <zhan.liu@amd.com>
Date: Thu, 17 Oct 2019 14:55:56 -0400
Subject: [PATCH 4223/4736] drm/amd/display: setting the DIG_MODE to the
correct value.
[Why]
This patch is for fixing Navi14 HDMI display pink screen issue.
[How]
Call stream->link->link_enc->funcs->setup twice. This is setting
the DIG_MODE to the correct value after having been overridden by
the call to transmitter control.
Change-Id: Ie739e345753440280bfeecff0b0ac9fda09c5ed0
Signed-off-by: Zhan liu <zhan.liu@amd.com>
Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
---
drivers/gpu/drm/amd/display/dc/core/dc_link.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
index 5ce5db7818e4..ea50ba20dd68 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
@@ -2840,6 +2840,15 @@ void core_link_enable_stream(
CONTROLLER_DP_TEST_PATTERN_VIDEOMODE,
COLOR_DEPTH_UNDEFINED);
+ /* This second call is needed to reconfigure the DIG
+ * as a workaround for the incorrect value being applied
+ * from transmitter control.
+ */
+ if (!dc_is_virtual_signal(pipe_ctx->stream->signal))
+ stream->link->link_enc->funcs->setup(
+ stream->link->link_enc,
+ pipe_ctx->stream->signal);
+
#ifdef CONFIG_DRM_AMD_DC_DSC_SUPPORT
if (pipe_ctx->stream->timing.flags.DSC) {
if (dc_is_dp_signal(pipe_ctx->stream->signal) ||
--
2.17.1
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