This is a note to let you know that I've just added the patch titled
drm/amd/display: Keep PHY active for dp config
to the 6.1-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-keep-phy-active-for-dp-config.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 2b02d746c1818baf741f4eeeff9b97ab4b81e1cf Mon Sep 17 00:00:00 2001
From: Agustin Gutierrez <agustin.gutierrez@xxxxxxx>
Date: Tue, 21 Feb 2023 16:08:15 -0500
Subject: drm/amd/display: Keep PHY active for dp config
From: Agustin Gutierrez <agustin.gutierrez@xxxxxxx>
commit 2b02d746c1818baf741f4eeeff9b97ab4b81e1cf upstream.
[Why]
Current hotplug sequence causes temporary hang at the re-entry of the
optimized power state.
[How]
Keep a PHY active when detecting DP signal + DPMS active
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@xxxxxxx>
Acked-by: Qingqing Zhuo <qingqing.zhuo@xxxxxxx>
Signed-off-by: Agustin Gutierrez <agustin.gutierrez@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/dc/clk_mgr/dcn314/dcn314_clk_mgr.c | 5 +++++
1 file changed, 5 insertions(+)
--- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn314/dcn314_clk_mgr.c
+++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn314/dcn314_clk_mgr.c
@@ -108,6 +108,11 @@ static int dcn314_get_active_display_cnt
stream->signal == SIGNAL_TYPE_DVI_SINGLE_LINK ||
stream->signal == SIGNAL_TYPE_DVI_DUAL_LINK)
tmds_present = true;
+
+ /* Checking stream / link detection ensuring that PHY is active*/
+ if (dc_is_dp_signal(stream->signal) && !stream->dpms_off)
+ display_count++;
+
}
for (i = 0; i < dc->link_count; i++) {
Patches currently in stable-queue which might be from agustin.gutierrez@xxxxxxx are
queue-6.1/drm-amd-display-keep-phy-active-for-dp-config.patch
