dm_test_vbla...e_decrements(9)

📦 version 7.3.1, in nixpkgs unstable

dm_test_vbla...e_decrements(9) 💅✨

okay so this is a page from the Kernel API Manual, section 9, and it's about one very specific little KUnit test. yes bestie, we're getting that granular. she's niche, she's real, and she's here 🎀

🌸 NAME 🌸

dm_test_vblank_control_worker_disable_decrements — the test that checks whether disabling drops the IRQ count. no cap, that's the whole vibe check.

✨ SYNOPSIS ✨

void dm_test_vblank_control_worker_disable_decrements (struct kunit
*test );

🫶 ARGUMENTS 🫶

  • test — the KUnit test context. that's it, that's the argument. she needs her context to function, honestly relatable 💅

💜 DESCRIPTION 💜

so the whole point: when you run the worker with enable clear, it must decrement a non-zero active vblank IRQ count. like, the count is sitting there at some non-zero number, the worker runs with enable clear, and boom — it goes down by one. that's the entire test. and if it doesn't? the test notices. 😭

fr fr, don't skip this one — "must decrement" is not a suggestion, it's the assertion.

🔥 SEE ALSO 🔥

🦋 Kernel file

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

👑 all the sibling tests (yes, all of them, we don't do half-lists here)

okay that's the whole page, you're officially educated 🧚💖 one last thing — the source/version line on the way out reads ./drivers/gpu/drm/amd/display/... with a date of October 2026, so like, yes, this manual is from the future and she's still iconic. periodt. 🌈⭐

📦 where this page comes from