drm/amd/display: Test dm_init_microcode

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[WHAT]
Add KUnit tests for dm_init_microcode(), covering the ASIC to firmware
name mapping for all 21 supported IP versions and the firmware request
failure path.

[HOW]
The real amdgpu_ucode_request() reaches the firmware loader, so add a
KUnit-only indirection table for it. The default table entry points at
the existing function, so no test-only wrapper is introduced, and the
prototype is mirrored verbatim so an upstream change fails the build at
the default initializer rather than diverging silently.

Tests install a fake that records the formatted firmware name, letting a
single table-driven case assert the name chosen for every ASIC,
including the Green Sardine revision check and the Sienna Cichlid versus
Navy Flounder split on the graphics IP version.

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>

...

This commit is contained in:

Alex Hung 2026-08-11 11:50:34 -06:00 • committed by Alex Deucher

parent 7527232a60

commit 101ff514db

3 changed files with 148 additions and 2 deletions

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26

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

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9

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

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115

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

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