1 files changed, 35 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/4483-drm-amd-display-Connect-DIG-FE-to-its-BE-before-link.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/4483-drm-amd-display-Connect-DIG-FE-to-its-BE-before-link.patch
new file mode 100644
index 00000000..59dc9fe1
--- /dev/null
+++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/4483-drm-amd-display-Connect-DIG-FE-to-its-BE-before-link.patch
@@ -0,0 +1,35 @@
+From d9e8bbbc6fffd210c026fa011ed1b556d00eaea0 Mon Sep 17 00:00:00 2001
+From: Nikola Cornij <nikola.cornij@amd.com>
+Date: Tue, 29 Oct 2019 15:49:28 -0400
+Subject: [PATCH 4483/4736] drm/amd/display: Connect DIG FE to its BE before
+ link training starts
+
+[why]
+In SST mode no idle pattern will be generated after link training if
+DIG FE is not connected to DIG BE.
+
+Signed-off-by: Nikola Cornij <nikola.cornij@amd.com>
+Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
+Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
+---
+ drivers/gpu/drm/amd/display/dc/core/dc_link.c | 4 ++++
+ 1 file changed, 4 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 7fab34ce0591..58b63612c926 100644
+--- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
++++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
+@@ -1546,6 +1546,10 @@ static enum dc_status enable_link_dp(
+ 	panel_mode = dp_get_panel_mode(link);
+ 	dp_set_panel_mode(link, panel_mode);
+ 
++	/* We need to do this before the link training to ensure the idle pattern in SST
++	 * mode will be sent right after the link training */
++	link->link_enc->funcs->connect_dig_be_to_fe(link->link_enc,
++						    pipe_ctx->stream_res.stream_enc->id, true);
+ 	skip_video_pattern = true;
+ 
+ 	if (link_settings.link_rate == LINK_RATE_LOW)
+-- 
+2.17.1
+