drm/amd/display: Test panel power savings sysfs

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[WHAT]
Add KUnit coverage using a DRM-managed connector fixture.

Tests cover show() mapping immediate-disable to 0 and reporting an active
ABM level, and store() handling the disable mapping, the forbidden update,
invalid text, and out-of-range input. show() writes through a page-backed
buffer because sysfs_emit() requires one.

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 18:43:57 -06:00 • committed by Alex Deucher

parent 0198bf2a7c

commit db546ee971

3 changed files with 195 additions and 6 deletions

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16

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

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8

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

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177

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

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