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drm/amd/display: Fix DP-DVI dongle hotplug

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[why]
Hotplugging with a DVI-DP dongle on pre-rdna embedded platform
working about half the time. The regression was found to be the
setting of link->type here.
[what]
Reverts fix besides the logging added.

Reviewed-by: Wenjing Liu <wenjing.liu@amd.com>
Signed-off-by: Jerry Zuo <jerry.zuo@amd.com>
Signed-off-by: Gabe Teeger <gabe.teeger@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Gabe Teeger 2024-06-28 16:05:36 -04:00 committed by Alex Deucher
parent c18fa08e6f
commit d94df7cad2
1 changed files with 1 additions and 4 deletions
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5
drivers/gpu/drm/amd/display/dc/link/link_detection.c
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@ -863,7 +863,6 @@ static bool detect_link_and_local_sink(struct dc_link *link,
struct dc_sink *prev_sink = NULL;
struct dpcd_caps prev_dpcd_caps;
enum dc_connection_type new_connection_type = dc_connection_none;
enum dc_connection_type pre_connection_type = link->type;
const uint32_t post_oui_delay = 30; // 30ms
DC_LOGGER_INIT(link->ctx->logger);
@ -965,7 +964,6 @@ static bool detect_link_and_local_sink(struct dc_link *link,
}
if (!detect_dp(link, &sink_caps, reason)) {
link->type = pre_connection_type;
if (prev_sink)
dc_sink_release(prev_sink);
@ -1299,8 +1297,7 @@ bool link_detect(struct dc_link *link, enum dc_detect_reason reason)
link->dpcd_caps.is_mst_capable)
is_delegated_to_mst_top_mgr = discover_dp_mst_topology(link, reason);
if (is_local_sink_detect_success &&
pre_link_type == dc_connection_mst_branch &&
if (pre_link_type == dc_connection_mst_branch &&
link->type != dc_connection_mst_branch)
is_delegated_to_mst_top_mgr = link_reset_cur_dp_mst_topology(link);