drm/amd/display: Test HPD RX downstream handling

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[WHAT]
handle_hpd_rx_irq() left its whole post-detect block untested
apart from a failing re-detect, and never dispatched a CP_IRQ.

[HOW]
Add four tests covering a failing connection-type probe, a
connector forced on that is emulated instead of detected, a successful
re-detect that notifies userspace, and a CP_IRQ that must be handed to
the HDCP work queue for the connector that raised it.

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: George Zhang <george.zhang@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 2026-09-04 00:00:59 -06:00 • committed by Alex Deucher

parent eaf6816305

commit 8cc240ffad

1 changed files with 134 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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