drm/amd/display: Test GPU memory allocate and free helpers

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[WHAT]
Add a KUnit test for dm_helpers_allocate_gpu_mem() and
dm_helpers_free_gpu_mem() that allocates a DMUB tracebuffer and frees it
again, checking the returned CPU pointer and GPU address.

[HOW]
amdgpu_bo_create_kernel() and amdgpu_bo_free_kernel() need a live TTM
device, so both are replaced by a fake through the existing
amdgpu_dm_services KUnit operations table.

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>

...

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Alex Hung 2026-08-11 14:05:47 -06:00 • committed by Alex Deucher

parent 0565f79f80

commit 7ed3fa3e7a

2 changed files with 95 additions and 0 deletions

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

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93

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

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