drm/amd/display: Test ISM idle commit

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[WHAT]
Add KUnit tests for the three idle-optimization commit arms of the ISM
FSM: OPTIMIZED_IDLE, OPTIMIZED_IDLE_SSO and TIMER_ABORTED.

[HOW]
Record idle changes with a stub on
dc->hwss.apply_idle_power_optimizations() and read the outcome from
dc->idle_optimizations_allowed.

DC already owns that callback, so it is the natural injection point.
dc_allow_idle_optimizations() returns early when the requested state
already matches, so the stub runs only on a real transition and its
call count is the number of idle changes the FSM asked for. That count
is what separates the three arms, which otherwise all leave idle in
the same state.

The remaining two commit calls need no double:
dc_post_update_surfaces_to_stream() returns on !dc->optimized_required
and amdgpu_dm_crtc_set_static_screen_optimze() stops in the replay and
PSR event helpers when the link has neither feature enabled. Both are
already no-ops on a test dc, so a double would only add upkeep.

Assisted-by: Copilot:Claude-Opus-5
Reviewed-by: Bhawanpreet Lakha <bhawanpreet.lakha@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Alex Hung 2026-08-14 16:48:24 -06:00 • committed by Alex Deucher

parent 5153f7864c

commit 4066b56704

1 changed files with 193 additions and 5 deletions

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

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