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Message-Id: <20220418121147.788986359@linuxfoundation.org>
Date: Mon, 18 Apr 2022 14:12:48 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Anthony Koo <Anthony.Koo@....com>,
Alex Hung <alex.hung@....com>,
Chiawen Huang <chiawen.huang@....com>,
Daniel Wheeler <daniel.wheeler@....com>,
Alex Deucher <alexander.deucher@....com>,
Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.10 046/105] drm/amd/display: FEC check in timing validation
From: Chiawen Huang <chiawen.huang@....com>
[ Upstream commit 7d56a154e22ffb3613fdebf83ec34d5225a22993 ]
[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@....com>
Acked-by: Alex Hung <alex.hung@....com>
Signed-off-by: Chiawen Huang <chiawen.huang@....com>
Tested-by: Daniel Wheeler <daniel.wheeler@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
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 93f5229c303e..ac5323596c65 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -1173,6 +1173,10 @@ bool dc_validate_seamless_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)
--
2.35.1
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