The patch below does not apply to the 5.4-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@xxxxxxxxxxxxxxx>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From 3b7c59754cc22760760a84ebddb8e0b1e8dd871b Mon Sep 17 00:00:00 2001
From: Mario Kleiner <mario.kleiner.de@xxxxxxxxx>
Date: Thu, 9 Jan 2020 16:20:27 +0100
Subject: [PATCH] drm/amd/display: Reorder detect_edp_sink_caps before link
settings read.
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@xxxxxxx>
Signed-off-by: Mario Kleiner <mario.kleiner.de@xxxxxxxxx>
Cc: Martin Leung <martin.leung@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
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 62d8289abb4e..4619f94f0ac7 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
@@ -817,8 +817,8 @@ static bool dc_link_detect_helper(struct dc_link *link,
}
case SIGNAL_TYPE_EDP: {
- read_current_link_settings_on_detect(link);
detect_edp_sink_caps(link);
+ read_current_link_settings_on_detect(link);
sink_caps.transaction_type = DDC_TRANSACTION_TYPE_I2C_OVER_AUX;
sink_caps.signal = SIGNAL_TYPE_EDP;
break;
