drm/amd/display: Add KUnit tests for amdgpu_dm_dmub

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Add KUnit tests for amdgpu_dm_dmub.c covering the following
functions:

- dm_register_dmub_notify_callback(): NULL callback rejection,
  out-of-range type, valid registration with offload flag
- dm_dmub_aux_setconfig_callback(): copy and complete on AUX
  reply, non-AUX skip, NULL dm_notify, SET_CONFIG reply
- dm_dmub_aux_fused_io_callback(): copy reply and complete,
  max ddc_line boundary
- dm_get_default_ips_mode(): IPS mode per DCN version (3.5,
  3.5.1, 3.6, 4.2), disabled for older ASICs, default enabled
  for unhandled newer ASICs
- dm_dmub_hw_init(): early returns for no dmub_srv, no fb_info,
  no firmware
- dm_dmub_hw_resume(): no-op when dmub_srv is NULL
- dm_dmub_sw_init(): returns 0 for unsupported ASIC
- dm_init_microcode(): returns 0 for unsupported ASIC

Assisted-by: Copilot:Claude-Opus-4.6
Reviewed-by: Bhawanpreet Lakha <bhawanpreet.lakha@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Chenyu Chen <chen-yu.chen@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 2026-04-29 21:28:36 -06:00 • committed by Alex Deucher

parent c71a6dc1cf

commit 829e9b68ea

3 changed files with 610 additions and 0 deletions

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9

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

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1

drivers/gpu/drm/amd/display/amdgpu_dm/tests/Makefile

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600

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

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