dm_test_bac...el_pwm_error(9)

📦 version 7.3.1, in nixpkgs unstable

💖 dm_test_bac...el_pwm_error(9) — Kernel API Manual ✨

okay so bestie, welcome to the glow-up era of the Kernel API Manual, and today's main character is dm_test_backlight_get_level_pwm_error 💅 she's a KUnit test, she's lowkey niche, she's the PWM readback fallback test, and honestly? iconic.

🌸 NAME 🌸

dm_test_backlight_get_level_pwm_error — Test PWM readback fallback 🎀

like literally, that's her whole job: testing that the PWM readback fallback does what it's supposed to do. no cap. 🦋

✨ SYNOPSIS ✨

void dm_test_backlight_get_level_pwm_error (struct kunit *test );

that's it, that's the whole signature 🫶 tiny function, big energy.

💜 ARGUMENTS 💜

  • test — The KUnit test context. yeah, that's the KUnit test context, bestie — it's the little harness buddy that carries the test state around so the test can actually do its thing. give her the respect she deserves 👑

🔥 SEE ALSO 🔥

first up, the Kernel file itself, in all her path-y glory:

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

and now the whole friend group 🫶 — the entire backlight test squad, in order, no one left out, periodt:

bestie reminder 🫶 this page lives in the source tree at ./drivers/gpu/drm/amd/display/... — that's the abridged path as printed, not me being lazy, it's literally what's on the page 💀

🎀 the sign-off 🎀

so that's the page! source/version situation: ./drivers/gpu/drm/amd/display/..., dated October 2026, and the manual tag on the footer side is dm_test_bac...el_pwm_error(9) — matching the header up top, because symmetry is slay ✨ go read the test file, she ate 💅🌸

📦 where this page comes from