From 99b922f9ed6a6313c0d2247cde8aa1e4a0bd67e4 Mon Sep 17 00:00:00 2001
From: Wenjing Liu <Wenjing.Liu@amd.com>
Date: Wed, 5 Dec 2018 12:14:45 -0500
Subject: [PATCH] drm/amd/display: validate extended dongle caps
Git-commit: 99b922f9ed6a6313c0d2247cde8aa1e4a0bd67e4
Patch-mainline: v5.0-rc1
References: bsc#1111666
[why]
Some dongle doesn't have a valid extended dongle caps,
but we still set the extended dongle caps to be valid.
This causes validation fails for all timing.
[how]
If no dp_hdmi_max_pixel_clk is provided,
don't use extended dongle caps.
Signed-off-by: Wenjing Liu <Wenjing.Liu@amd.com>
Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Abdoulaye Berthe <Abdoulaye.Berthe@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
index 0999102e7130..0caacb60b02f 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
@@ -2247,7 +2247,8 @@ static void get_active_converter_info(
translate_dpcd_max_bpc(
hdmi_color_caps.bits.MAX_BITS_PER_COLOR_COMPONENT);
- link->dpcd_caps.dongle_caps.extendedCapValid = true;
+ if (link->dpcd_caps.dongle_caps.dp_hdmi_max_pixel_clk != 0)
+ link->dpcd_caps.dongle_caps.extendedCapValid = true;
}
break;
--
2.16.4