drm/amd/display: Test backlight device registration

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[WHAT]
Add KUnit test to amdgpu_dm_register_backlight_device() and
cover its bl_idx == -1 early return, which must leave the
backlight device slot untouched.

Assisted-by: Copilot:Claude-Opus-4.8
Reviewed-by: Bhawanpreet Lakha <bhawanpreet.lakha@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: George Zhang <george.zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

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Alex Hung 2026-06-29 18:40:26 -06:00 • committed by Alex Deucher

parent c50a4305df

commit 0198bf2a7c

2 changed files with 21 additions and 0 deletions

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1

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

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20

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

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