drm/amd/display: Test global modeset lock acquisition

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[WHAT]
Add KUnit tests for do_aquire_global_lock() covering a device without
CRTCs, a CRTC with no pending commit, and a CRTC whose commit has already
completed.

[HOW]
Pre-signal the commit completions so the waits return immediately. The
extra reference the loop takes is released again, so the commit never
reaches zero and stays test-managed.

Assisted-by: Copilot:Claude-Opus-5 GPT-5.6-Sol
Reviewed-by: Bhawanpreet Lakha <bhawanpreet.lakha@amd.com>
Signed-off-by: Alex Hung <alex.hung@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 2026-08-13 14:06:33 -06:00 • committed by Alex Deucher

parent 448defc239

commit 9c17c2918f

3 changed files with 106 additions and 2 deletions

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5

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

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2

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

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101

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

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