drm/amd/display: Add color transfer-function tests

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[WHY]
The color transfer-function calculation helpers were not covered by
the amdgpu_dm_color KUnit suite. They rely on DAL fixed-point math
and run under the KUnit UML build without native floating point.

[HOW]
Expose the five static helpers to KUnit and add direct coverage for
the legacy, 16-bit, and 32-bit input and output transfer-function
paths, including sRGB, linear, and ROM-backed variants.

Assisted-by: Copilot:GPT-5.6-Sol
Reviewed-by: Bhawanpreet Lakha <bhawanpreet.lakha@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Fangzhi Zuo <jerry.zuo@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 2026-07-14 15:03:05 -06:00 • committed by Alex Deucher

parent 36e7f55ec8

commit bfab0b0efd

3 changed files with 184 additions and 13 deletions

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36

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

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14

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

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147

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

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