drm/amd/display: Test VRR pageflip completion

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[WHAT]
dm_pflip_high_irq() only ever ran with VRR inactive, so the
scanout position query and the front-porch path that queues the
pageflip event on the vblank event list were never reached.

[HOW]
Add a fake timing generator reporting a scanout position past the
start of the front porch, plus a fixture that puts a submitted flip on
an active-VRR stream.

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 2026-09-03 23:59:06 -06:00 • committed by Alex Deucher

parent a6b2fb633c

commit dd6d670069

1 changed files with 138 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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