This is a note to let you know that I've just added the patch titled
drm/amd/display: Revert "Directly retrain link from debugfs"
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-amd-display-revert-directly-retrain-link-from-debugfs.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 1131cadfd7563975f3a4efcc6f7c1fdc872db38b Mon Sep 17 00:00:00 2001
From: Anson Jacob <Anson.Jacob@xxxxxxx>
Date: Tue, 24 Aug 2021 09:32:53 -0400
Subject: drm/amd/display: Revert "Directly retrain link from debugfs"
From: Anson Jacob <Anson.Jacob@xxxxxxx>
commit 1131cadfd7563975f3a4efcc6f7c1fdc872db38b upstream.
This reverts commit f5b6a20c7ef40599095c796b0500d842ffdbc639.
This patch broke new settings from taking effect. Hotplug is
required for new settings to take effect.
Reviewed-by: Mikita Lipski <mikita.lipski@xxxxxxx>
Acked-by: Mikita Lipski <mikita.lipski@xxxxxxx>
Signed-off-by: Anson Jacob <Anson.Jacob@xxxxxxx>
Tested-by: Daniel Wheeler <daniel.wheeler@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
@@ -247,6 +247,7 @@ static ssize_t dp_link_settings_write(st
{
struct amdgpu_dm_connector *connector = file_inode(f)->i_private;
struct dc_link *link = connector->dc_link;
+ struct dc *dc = (struct dc *)link->dc;
struct dc_link_settings prefer_link_settings;
char *wr_buf = NULL;
const uint32_t wr_buf_size = 40;
@@ -313,7 +314,7 @@ static ssize_t dp_link_settings_write(st
prefer_link_settings.lane_count = param[0];
prefer_link_settings.link_rate = param[1];
- dp_retrain_link_dp_test(link, &prefer_link_settings, false);
+ dc_link_set_preferred_training_settings(dc, &prefer_link_settings, NULL, link, true);
kfree(wr_buf);
return size;
Patches currently in stable-queue which might be from Anson.Jacob@xxxxxxx are
queue-5.15/drm-amd-display-revert-directly-retrain-link-from-debugfs.patch
