drm/amd/display: Test MST connector register and unregister

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[WHAT]
Add KUnit tests for amdgpu_dm_mst_connector_late_register() and
amdgpu_dm_mst_connector_early_unregister(), covering the remote AUX bus
registration, the unregister that only resets the MST status when no
remote sink is attached, and the unregister that removes the sink from
the DC link and clears the MST connector state.

[HOW]
The tests reuse the MST downstream connector fixture, which already
provides the kernel device the DRM MST helpers log through and the
modeset lock the unregister path takes.

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: Ivan Lipski <ivan.lipski@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Alex Hung 2026-08-12 12:56:51 -06:00 • committed by Alex Deucher

parent a49b964e81

commit 22736e70ef

3 changed files with 85 additions and 2 deletions

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6

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c

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2

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.h

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79

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

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