dm_test_cap...irst_exceeds(9)

📦 version 7.3.1, in nixpkgs unstable

💖 dm_test_cap_clock_levels_engine_first_exceeds — like, the whole vibe 💖

okay bestie, so this is a page from the Kernel API Manual, section 9, and it's about one (1) very specific little KUnit test. she's small but she's important, i promise. let's get into it ✨

✨ NAME ✨

dm_test_cap_clock_levels_engine_first_exceeds — Test floor of one level 🎀

like, she tests the floor. the floor of one level. that's the whole job. and she does it flawlessly, obviously. 💅

🌸 SYNOPSIS 🌸

void dm_test_cap_clock_levels_engine_first_exceeds (struct kunit *test
);

that's it. that's the whole signature. no return value, she just does it. main character energy fr fr 🦋

🫶 ARGUMENTS 🫶

  • test — the KUnit test context 💜 this is the little container that holds all the info about the test run itself, and yes you have to pass it, no you can't skip it, we love a required parameter.

🔥 DESCRIPTION 🔥

okay so listen. this test does a vibe check on a very specific edge case, and the edge case is this:

when the very first engine clock level already exceeds the validation clock (like, level zero out of the gate is too much, not even a warm-up), num_levels gets clamped to 1 — not 0.

not zero. ONE. 🫶

the whole point of the test is verifying it lands on 1 and doesn't accidentally clamp itself down to 0, which — yeah — would be a bug, and we don't do bugs here. periodt. 👑

🌈 SEE ALSO 🌈

bestie this list is LONG, so buckle up, hydrate, and let's go. 💀 Here's the kernel file it lives in:

  • ./drivers/gpu/drm/amd/display/amdgpu_dm/tests/amdgpu_dm_pp_smu_test.c

and here's the entire friend group, no one left behind, i'm literally listing all of them: 💖

see? everyone's here. it's giving family reunion. 🧚💜

that's the whole page bestie, you ate it up, no crumbs left 🍓

💌 cute lil sign-off: this came from ./drivers/gpu/drm/amd/display/... in the Kernel API Manual, dated October 2026. go forth and test your floors, queen 👑✨
📦 where this page comes from