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drm/amd/display: Add MST debug message when link detection fails

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[WHY & HOW]
dc_link_detect returns a boolean value which can be used to print debug
messages when it fails.

This fixes 1 CHECKED_RETURN issue reported by Coverity.

Reviewed-by: Rodrigo Siqueira <rodrigo.siqueira@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Hung 2024-07-12 09:39:13 -06:00 committed by Alex Deucher
parent fae1879dc2
commit 1a03b0e6c5
1 changed files with 4 additions and 1 deletions
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5
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
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@ -3804,9 +3804,12 @@ static int trigger_hpd_mst_set(void *data, u64 val)
if (aconnector->dc_link->type == dc_connection_mst_branch &&
aconnector->mst_mgr.aux) {
mutex_lock(&adev->dm.dc_lock);
dc_link_detect(aconnector->dc_link, DETECT_REASON_HPD);
ret = dc_link_detect(aconnector->dc_link, DETECT_REASON_HPD);
mutex_unlock(&adev->dm.dc_lock);
if (!ret)
DRM_ERROR("DM_MST: Failed to detect dc link!");
ret = drm_dp_mst_topology_mgr_set_mst(&aconnector->mst_mgr, true);
if (ret < 0)
DRM_ERROR("DM_MST: Failed to set the device into MST mode!");