drm/amd/display: Test handle_hpd_irq_helper detect and debounce exits

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[WHAT]
Add KUnit tests for handle_hpd_irq_helper() covering a failing
dc_link_detect_connection_type() and the early return taken when a
debounce re-detect is already scheduled. Also arm the debounce work in
the stale-prev-sink test so mod_delayed_work() re-schedules.

[HOW]
Both build on dm_test_setup_hpd_irq_helper() and override only the
link_srv stubs they need. The pending-debounce test arms the work ten
seconds out and spies on dc_link_detect() to prove it was skipped.

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 19:03:51 -06:00 • committed by Alex Deucher

parent 7c72657023

commit 3623121b15

1 changed files with 79 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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