From: Jasdeep Dhillon <jdhillon@amd.com>
To: <amd-gfx@lists.freedesktop.org>
Cc: stylon.wang@amd.com, Ilya <Ilya.Bakoulin@amd.com>,
Aric Cyr <Aric.Cyr@amd.com>,
Sunpeng.Li@amd.com, Harry.Wentland@amd.com,
qingqing.zhuo@amd.com, Jasdeep Dhillon <jdhillon@amd.com>,
Rodrigo.Siqueira@amd.com, roman.li@amd.com, solomon.chiu@amd.com,
Aurabindo.Pillai@amd.com, wayne.lin@amd.com,
Bhawanpreet.Lakha@amd.com, agustin.gutierrez@amd.com,
pavle.kotarac@amd.com
Subject: [PATCH 09/13] drm/amd/display: Fix DP LT sequence on EQ fail
Date: Fri, 4 Feb 2022 23:33:06 -0500 [thread overview]
Message-ID: <20220205043310.165991-10-jdhillon@amd.com> (raw)
In-Reply-To: <20220205043310.165991-1-jdhillon@amd.com>
From: Ilya <Ilya.Bakoulin@amd.com>
[Why]
The number of lanes wasn't being reset to maximum when reducing link
rate due to an EQ failure. This could result in having fewer lanes in
the verified link capabilities, a lower maximum link bandwidth, and
fewer modes being supported.
[How]
Reset the number of lanes to max when dropping link rate due to EQ
failure during link training.
Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: Jasdeep Dhillon <jdhillon@amd.com>
Signed-off-by: Ilya <Ilya.Bakoulin@amd.com>
---
drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 2 ++
1 file changed, 2 insertions(+)
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 d0cb40df60a4..cd9c31b5e55d 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
@@ -3504,6 +3504,7 @@ static bool decide_fallback_link_setting(
current_link_setting->link_rate =
reduce_link_rate(
current_link_setting->link_rate);
+ current_link_setting->lane_count = initial_link_settings.lane_count;
} else {
return false;
}
@@ -3516,6 +3517,7 @@ static bool decide_fallback_link_setting(
current_link_setting->link_rate =
reduce_link_rate(
current_link_setting->link_rate);
+ current_link_setting->lane_count = initial_link_settings.lane_count;
} else {
return false;
}
--
2.25.1
next prev parent reply other threads:[~2022-02-05 4:33 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-05 4:32 [PATCH 00/13] DC Patchset, Feb 7 2022 v3 Jasdeep Dhillon
2022-02-05 4:32 ` [PATCH 01/13] drm/amd/display: Fix for variable may be used uninitialized error Jasdeep Dhillon
2022-02-05 4:32 ` [PATCH 02/13] drm/amd/display: Fix stream->link_enc unassigned during stream removal Jasdeep Dhillon
2022-02-05 4:33 ` [PATCH 03/13] drm/amd/display: limit unbounded requesting to 5k Jasdeep Dhillon
2022-02-05 4:33 ` [PATCH 04/13] drm/amd/display: remove static from optc31_set_drr Jasdeep Dhillon
2022-02-05 4:33 ` [PATCH 05/13] dc: do blocked MST topology discovery at resume from S3/S4 Jasdeep Dhillon
2022-02-05 4:33 ` [PATCH 06/13] drm/amd/display: fix yellow carp wm clamping Jasdeep Dhillon
2022-02-05 4:33 ` [PATCH 07/13] drm/amd/display: change fastboot timing validation Jasdeep Dhillon
2022-02-05 4:33 ` [PATCH 08/13] drm/amd/display: keep eDP Vdd on when eDP stream is already enabled Jasdeep Dhillon
2022-02-05 4:33 ` Jasdeep Dhillon [this message]
2022-02-05 4:33 ` [PATCH 10/13] drm/amd/display: [FW Promotion] Release 0.0.103.0 Jasdeep Dhillon
2022-02-05 4:33 ` [PATCH 11/13] drm/amd/display: 3.2.172 Jasdeep Dhillon
2022-02-05 4:33 ` [PATCH 12/13] drm/amd/display: handle null link encoder Jasdeep Dhillon
2022-02-05 4:33 ` [PATCH 13/13] drm/amd/display: Basic support with device ID Jasdeep Dhillon
2022-02-07 15:58 ` Alex Deucher
2022-02-07 16:24 ` Dhillon, Jasdeep
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