linux-kernel - [PATCH 5.4 106/222] drm/amd/display: Reorder detect_edp_sink

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Message-Id: <20200122092841.327644984@linuxfoundation.org>
Date:   Wed, 22 Jan 2020 10:28:12 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Harry Wentland <harry.wentland@....com>,
        Mario Kleiner <mario.kleiner.de@...il.com>,
        Martin Leung <martin.leung@....com>,
        Alex Deucher <alexander.deucher@....com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.4 106/222] drm/amd/display: Reorder detect_edp_sink_caps before link settings read.

From: Mario Kleiner <mario.kleiner.de@...il.com>

[ Upstream commit 3b7c59754cc22760760a84ebddb8e0b1e8dd871b ]

read_current_link_settings_on_detect() on eDP 1.4+ may use the
edp_supported_link_rates table which is set up by
detect_edp_sink_caps(), so that function needs to be called first.

Reviewed-by: Harry Wentland <harry.wentland@....com>
Signed-off-by: Mario Kleiner <mario.kleiner.de@...il.com>
Cc: Martin Leung <martin.leung@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Cc: stable@...r.kernel.org
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/amd/display/dc/core/dc_link.c | 2 +-
 1 file changed, 1 insertion(+), 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 793aa8e8ec9a..c0f1c62c59b4 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
@@ -809,8 +809,8 @@ bool dc_link_detect(struct dc_link *link, enum dc_detect_reason reason)
 		}
 
 		case SIGNAL_TYPE_EDP: {
-			read_edp_current_link_settings_on_detect(link);
 			detect_edp_sink_caps(link);
+			read_edp_current_link_settings_on_detect(link);
 			sink_caps.transaction_type =
 				DDC_TRANSACTION_TYPE_I2C_OVER_AUX;
 			sink_caps.signal = SIGNAL_TYPE_EDP;
-- 
2.20.1