dm_test_upda...ng_underscan(9)

📦 version 7.3.1, in nixpkgs unstable

💅 dm_test_update_scaling_underscan 💅

okay so bestie, welcome to the Kernel API Manual entry for dm_test_upda...ng_underscan(9) — yes the title is truncated, no that's not me being lazy, that's just how the header line renders in your terminal, iykyk 🫶. This is the page for dm_test_update_scaling_underscan(9), and it's a KUnit test. Not a command you run, not a daemon, a test. She lives in the kernel's AMD display test suite and her whole job is to vibe-check underscan borders. Let's get into it 🌸

✨ NAME ✨

dm_test_update_scaling_underscan — Test underscan borders shrink and offset dst 💖

That's the whole personality. The borders got smaller, and dst moved. She checks it. Slay.

🎀 SYNOPSIS 🎀

void dm_test_update_scaling_underscan (struct kunit *test );

Returns void, takes one thing, does not miss. Periodt. ⭐

🦋 ARGUMENTS 🦋

  • test — The KUnit test context. That's the little KUnit universe this test runs inside — it's how KUnit knows which test is which, tracks pass/fail, and generally keeps the whole situation organised. It gets handed to you, you don't build it yourself 🧚

🔥 SEE ALSO 🔥

📁 Kernel file

The source of truth, the mothership, the place where this test actually lives:

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

Go read it, it's giving main character energy 👑

🌈 The rest of the friend group

Bestie, this connector test file has SO many siblings and they all get a shoutout. Not me listing every single one… but also yes, every single one, because we don't gatekeep here 💅

💀 real talk though: those trailing (9) bits mean "section 9 of the manual", which is the kernel API section. So when you're like "wait, is this a shell command?" — no bestie, it's kernel API, section 9, that's the whole tell 🧚

and that's the page!! not a single flag, not a single exit status, because she's a test not a tool, and she said what she said 💅 the whole thing ships from ./drivers/gpu/drm/amd/display/... and it's dated October 2026 (yes, the future, no I can't explain it, the manpage said so 🌈), signing off as dm_test_upda...ng_underscan(9) — mwah, go run your tests, ily 💖🎀🦋

📦 where this page comes from