drm/amd/display: Add more KUnit tests for amdgpu_dm_ism

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[Why & How]
Add 8 more KUnit tests:

- dm_ism_get_idle_allow_delay: add a case where filter_entry_count
  exceeds filter_history_size, exercising the max() branch in the
  history_size calculation.
- amdgpu_dm_ism_init: verify all fields are initialised to
  expected values after construction.
- amdgpu_dm_ism_fini: smoke-test cancellation of never-scheduled
  delayed work items paired with a preceding init.
- dm_ism_set_last_idle_ts: verify last_idle_timestamp_ns is
  updated to at least the value captured before the call.
- dm_ism_insert_record: verify index increment and duration
  calculation; verify out-of-bounds index wraps to slot 0.
- dm_ism_trigger_event: verify current_state and previous_state
  are updated on a valid transition and left unchanged on an
  invalid one.

Assisted-by: Copilot:Claude-Sonnet-4.6
Reviewed-by: Ray Wu <ray.wu@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Ray Wu <ray.wu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Alex Hung 2026-05-15 09:55:45 -06:00 • committed by Alex Deucher

parent 2da6b0b28f

commit a3142b13fe

3 changed files with 228 additions and 3 deletions

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12

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_ism.c

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4

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_ism.h

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215

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

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