From: Paul Hsieh <Paul.Hsieh@amd.com>
Date: Tue, 7 Mar 2023 13:04:28 +0000 (+0800)
Subject: drm/amd/display: power down eDP if eDP not present
X-Git-Tag: Ubuntu-6.5.0-9.9~2862^2~12^2~82
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=426714f89f7081ce8bf83546219eed6ea1511891;p=mirror_ubuntu-kernels.git

drm/amd/display: power down eDP if eDP not present

[Why]
When init, driver will power up eDP to check eDP
present or not. If eDP not present, driver doesn't
power off eDP VDD cause power consumption.

[How]
If eDP is not present when detection, power off eDP
VDD.

Reviewed-by: Wenjing Liu <Wenjing.Liu@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Paul Hsieh <Paul.Hsieh@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/display/dc/link/link_detection.c b/drivers/gpu/drm/amd/display/dc/link/link_detection.c
index 67addedd8956..a131e30fd7d6 100644
--- a/drivers/gpu/drm/amd/display/dc/link/link_detection.c
+++ b/drivers/gpu/drm/amd/display/dc/link/link_detection.c
@@ -1227,6 +1227,11 @@ bool link_detect_connection_type(struct dc_link *link, enum dc_connection_type *
 		/* TODO: need to do the actual detection */
 	} else {
 		*type = dc_connection_none;
+		if (link->connector_signal == SIGNAL_TYPE_EDP) {
+			/* eDP is not connected, power down it */
+			if (!link->dc->config.edp_no_power_sequencing)
+				link->dc->hwss.edp_power_control(link, false);
+		}
 	}
 
 	return true;