drm/amd/display: Test pageflip completion in the high IRQ handlers

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[WHAT]
Add KUnit tests for pageflip completion: the non-VRR path in
dm_pflip_high_irq(), and the DCN VUPDATE_NO_LOCK paths in
dm_vupdate_high_irq() that deliver the event once the OTG reports no
flip pending, or retire the flip when there are no active planes.

[HOW]
Initialise DRM vblank and hold a reference to balance the handler's
drm_crtc_vblank_put(). A non-zero DCE IP version selects the DCN path,
and a NULL adev->dm.dc makes dc_get_flip_pending_on_otg() report no
pending flip.

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>

...

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Alex Hung 2026-08-12 19:03:12 -06:00 • committed by Alex Deucher

parent 694c52c80b

commit f2d90f2477

1 changed files with 118 additions and 0 deletions

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

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