From ba709eaf1237645ea0f6191304f6312982a8861c Mon Sep 17 00:00:00 2001
From: Harry Wentland <harry.wentland@amd.com>
Date: Tue, 21 Jan 2020 16:29:54 -0500
Subject: Revert "drm/amd/display: Don't skip link training for empty dongle"
Git-commit: da2f84ba73df11186cf23bec45d039f3b9162bd8
Patch-mainline: v5.6-rc1
References: jsc#SLE-12680, jsc#SLE-12880, jsc#SLE-12882, jsc#SLE-12883, jsc#SLE-13496, jsc#SLE-15322
This reverts commit 80adaebd2d411b7d6872a097634848a71eb13d20.
[WHY]
This change was working around a regression that occured in this:
commit 0301ccbaf67d ("drm/amd/display: DP Compliance 400.1.1 failure")
With the fix to run verify_link_cap when the SINK_COUNT of
dongles becomes non-zero this change is no longer needed.
Cc: Louis Li <Ching-shih.Li@amd.com>
Cc: Wenjing Liu <Wenjing.Liu@amd.com>
Cc: Hersen Wu <hersenxs.wu@amd.com>
Cc: Eric Yang <Eric.Yang2@amd.com>
Reviewed-by: Wenjing Liu <Wenjing.Liu@amd.com>
Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/amd/display/dc/core/dc_link.c | 10 ++--------
1 file changed, 2 insertions(+), 8 deletions(-)
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 cc2e05003595..a09119c10d7c 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
@@ -851,18 +851,12 @@ static bool dc_link_detect_helper(struct dc_link *link,
if (memcmp(&link->dpcd_caps, &prev_dpcd_caps, sizeof(struct dpcd_caps)))
same_dpcd = false;
}
- /* Active dongle plug in without display or downstream unplug*/
+ /* Active dongle downstream unplug*/
if (link->type == dc_connection_active_dongle &&
link->dpcd_caps.sink_count.bits.SINK_COUNT == 0) {
- if (prev_sink != NULL) {
+ if (prev_sink != NULL)
/* Downstream unplug */
dc_sink_release(prev_sink);
- } else {
- /* Empty dongle plug in */
- dp_verify_link_cap_with_retries(link,
- &link->reported_link_cap,
- LINK_TRAINING_MAX_VERIFY_RETRY);
- }
return true;
}
--
2.28.0