drm/amd/display: Test vblank event arming

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[WHAT]
Add KUnit tests for dm_arm_vblank_event() and
dm_arm_vblank_event_pre_programming() covering missing events, inactive
CRTCs, page-flip and cursor updates, and vblank reference acquisition.

[HOW]
Use one pending-event fixture. Initialize DRM vblank state only for the
pre-programming tests and release every acquired reference.

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>

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This commit is contained in:

Alex Hung 2026-08-13 14:02:44 -06:00 • committed by Alex Deucher

parent 1903ffbca1

commit b56e334dbd

3 changed files with 201 additions and 8 deletions

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18

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

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6

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

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185

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

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