From 8fc52471e30ca0f71062b108bc70dbadccc67fb8 Mon Sep 17 00:00:00 2001
From: Chiawen Huang <chiawen.huang@amd.com>
Date: Thu, 10 Mar 2022 00:07:59 +0800
Subject: drm/amd/display: FEC check in timing validation
Git-commit: 7d56a154e22ffb3613fdebf83ec34d5225a22993
Patch-mainline: v5.18-rc2
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]
disable/enable leads FEC mismatch between hw/sw FEC state.
[How]
check FEC status to fastboot on/off.
Reviewed-by: Anthony Koo <Anthony.Koo@amd.com>
Acked-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Chiawen Huang <chiawen.huang@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@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.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index f6e19efea756..75f9c97bebb0 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -1496,6 +1496,10 @@ bool dc_validate_boot_timing(const struct dc *dc,
if (!link->link_enc->funcs->is_dig_enabled(link->link_enc))
return false;
+ /* Check for FEC status*/
+ if (link->link_enc->funcs->fec_is_active(link->link_enc))
+ return false;
+
enc_inst = link->link_enc->funcs->get_dig_frontend(link->link_enc);
if (enc_inst == ENGINE_ID_UNKNOWN)
--
2.38.1