linux-kernel - [PATCH AUTOSEL 6.12 300/486] drm/amd/display: Add support for disconnected eDP streams

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20250505223922.2682012-300-sashal@kernel.org>
Date: Mon,  5 May 2025 18:36:16 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Harry VanZyllDeJong <hvanzyll@....com>,
	Wenjing Liu <wenjing.liu@....com>,
	Roman Li <roman.li@....com>,
	Daniel Wheeler <daniel.wheeler@....com>,
	Alex Deucher <alexander.deucher@....com>,
	Sasha Levin <sashal@...nel.org>,
	harry.wentland@....com,
	sunpeng.li@....com,
	christian.koenig@....com,
	airlied@...il.com,
	simona@...ll.ch,
	alex.hung@....com,
	michael.strauss@....com,
	george.shen@....com,
	PeiChen.Huang@....com,
	Ausef.Yousof@....com,
	Cruise.Hung@....com,
	amd-gfx@...ts.freedesktop.org,
	dri-devel@...ts.freedesktop.org
Subject: [PATCH AUTOSEL 6.12 300/486] drm/amd/display: Add support for disconnected eDP streams

From: Harry VanZyllDeJong <hvanzyll@....com>

[ Upstream commit 6571bef25fe48c642f7a69ccf7c3198b317c136a ]

[Why]
eDP may not be connected to the GPU on driver start causing
fail enumeration.

[How]
Move the virtual signal type check before the eDP connector
signal check.

Reviewed-by: Wenjing Liu <wenjing.liu@....com>
Signed-off-by: Harry VanZyllDeJong <hvanzyll@....com>
Signed-off-by: Roman Li <roman.li@....com>
Tested-by: Daniel Wheeler <daniel.wheeler@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 .../drm/amd/display/dc/link/protocols/link_dp_capability.c  | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c
index 23e650e39910e..d9a1e1a599674 100644
--- a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c
@@ -945,6 +945,9 @@ bool link_decide_link_settings(struct dc_stream_state *stream,
 		 * TODO: add MST specific link training routine
 		 */
 		decide_mst_link_settings(link, link_setting);
+	} else if (stream->signal == SIGNAL_TYPE_VIRTUAL) {
+		link_setting->lane_count = LANE_COUNT_FOUR;
+		link_setting->link_rate = LINK_RATE_HIGH3;
 	} else if (link->connector_signal == SIGNAL_TYPE_EDP) {
 		/* enable edp link optimization for DSC eDP case */
 		if (stream->timing.flags.DSC) {
@@ -967,9 +970,6 @@ bool link_decide_link_settings(struct dc_stream_state *stream,
 		} else {
 			edp_decide_link_settings(link, link_setting, req_bw);
 		}
-	} else if (stream->signal == SIGNAL_TYPE_VIRTUAL) {
-		link_setting->lane_count = LANE_COUNT_FOUR;
-		link_setting->link_rate = LINK_RATE_HIGH3;
 	} else {
 		decide_dp_link_settings(link, link_setting, req_bw);
 	}
-- 
2.39.5