drm/amd/display: Test writeback handling in dm_crtc_high_irq

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[WHAT]
Add KUnit tests for the two writeback vblanks in dm_crtc_high_irq(): the
first disables frame capture and marks wb_frame_done, the second signals
the out fence and clears the pending state.

[HOW]
dc_stream_fc_disable_writeback() dereferences dc->res_pool before its
NULL-stream check, so supply a dc with a fake IRQ service. The
completion test queues a bare drm_writeback_job and holds a vblank
reference for the completion's drm_crtc_vblank_put().

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 19:03:25 -06:00 • committed by Alex Deucher

parent f2d90f2477

commit 68f698eadd

1 changed files with 97 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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