From bae664cb0cd7646e0feadf12ee728b412d089012 Mon Sep 17 00:00:00 2001
From: Rajib Mahapatra <rajib.mahapatra@amd.com>
Date: Mon, 10 Jan 2022 13:15:19 +0530
Subject: drm/amd/display: Not to call dpcd_set_source_specific_data during
 resume.
Git-commit: 83a3766b147053e542f3c91c121cb9594239e644
Patch-mainline: v5.18-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225

[Why]
During resume path, dpcd_set_source_specific_data is taking
extra time when core_link_write_dpcd fails on DP_SOURCE_OUI+0x03
and DP_SOURCE_MINIMUM_HBLANK_SUPPORTED. Here,aux->transfer fails
with multiple retries and consume significant amount time during
S0i3 resume.

[How]
Not to call dpcd_set_source_specific_data during resume path
when there is no oled panel connected and achieve faster resume
during S0i3.

Reviewed-by: Hersen Wu <hersenxs.wu@amd.com>
Signed-off-by: Rajib Mahapatra <rajib.mahapatra@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 drivers/gpu/drm/amd/display/dc/core/dc_link.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

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 0c64dea4fdd8..e5d63b0d2594 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
@@ -862,7 +862,8 @@ static bool dc_link_detect_helper(struct dc_link *link,
 		(!link->dc->config.allow_edp_hotplug_detection)) &&
 		link->local_sink) {
 		// need to re-write OUI and brightness in resume case
-		if (link->connector_signal == SIGNAL_TYPE_EDP) {
+		if (link->connector_signal == SIGNAL_TYPE_EDP &&
+			(link->dpcd_sink_ext_caps.bits.oled == 1)) {
 			dpcd_set_source_specific_data(link);
 			msleep(post_oui_delay);
 			dc_link_set_default_brightness_aux(link);
-- 
2.38.1