drm/amd/display: Test MST topology start

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[WHAT]
Add a KUnit test to cover dm_helpers_dp_mst_start_top_mgr() its
success path.

[HOW]
Mark the topology manager as already in MST mode, so
drm_dp_mst_topology_mgr_set_mst() returns success without touching the
AUX channel or queueing the link probe work, and the helper reports
that MST was started.

Assisted-by: Copilot:Claude-Opus-5
Reviewed-by: Bhawanpreet Lakha <bhawanpreet.lakha@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: George Zhang <george.zhang@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

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Alex Hung 2026-09-03 19:39:39 -06:00 • committed by Alex Deucher

parent e149c8a697

commit 0a2e54900a

1 changed files with 25 additions and 0 deletions

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drivers/gpu/drm/amd/display/amdgpu_dm/tests/amdgpu_dm_helpers_test.c

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