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drm/amd/display: update link type to mst before topology discovery

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[Description]
link type is not updated before mst topology discovery.
This causes issue when branch device response to link address after before
the start topology discovery event finishes.

[Solution]
update link type to mst before topology discovery

Signed-off-by: Wenjing Liu <Wenjing.Liu@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Wenjing Liu
2017-09-21 18:53:40 -04:00
committed by Alex Deucher
parent fcbbe3da0a
commit e4ba6335cd
1 changed files with 3 additions and 3 deletions
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6
drivers/gpu/drm/amd/display/dc/core/dc_link.c
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@@ -496,6 +496,7 @@ static void detect_dp(
}
if (is_mst_supported(link)) {
sink_caps->signal = SIGNAL_TYPE_DISPLAY_PORT_MST;
link->type = dc_connection_mst_branch;
/*
* This call will initiate MST topology discovery. Which
@@ -524,12 +525,11 @@ static void detect_dp(
if (reason == DETECT_REASON_BOOT)
boot = true;
if (dm_helpers_dp_mst_start_top_mgr(
if (!dm_helpers_dp_mst_start_top_mgr(
link->ctx,
link, boot)) {
link->type = dc_connection_mst_branch;
} else {
/* MST not supported */
link->type = dc_connection_single;
sink_caps->signal = SIGNAL_TYPE_DISPLAY_PORT;
}
}