dm_test_cus..._below_first(9)

📦 version 7.3.1, in nixpkgs unstable

🌸 NAME 🌸

okay so bestie, this one is dm_test_custom_brightness_below_first — a test for Custom brightness below first 💅 like, it's the KUnit homie that checks what happens when your brightness value lands below the first custom data point. that's the whole vibe. ✨

this page lives in the Kernel API Manual (section 9, kernel API, iykyk) 🎀

✨ SYNOPSIS ✨

void dm_test_custom_brightness_below_first (struct kunit *test );

that's it. that's the whole signature. no cap. 🫶

💖 ARGUMENTS 💖

  • test — The KUnit test context 👑 this is the little test-world the function gets handed so it can actually run and report back. give it the context, it does the thing.

the return type is void, so like… it gives you nothing back. it's not being rude, that's just the assignment bestie 😭

🦋 SEE ALSO 🦋

📁 Kernel file

the source is literally right here, go look, it's giving main character energy:

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

🔥 the whole friend group (all of these are (9) btw, section 9 stays winning)

like… that's the entire backlight test squad and you literally got the full roster 💀 read them all, they're all section 9, they all ate 🍓

ok that's the page!! mwah 💜

source: ./drivers/gpu/drm/amd/display/... 🌈 — dated October 2026, and it's still dm_test_cus..._below_first(9) bestie, the abbreviated name is iconic, we don't fix it, we respect it 🎀✨💖

📦 where this page comes from