dm_test_pro...otocol_error(9)

📦 version 7.3.1, in nixpkgs unstable

✨ dm_test_pro...otocol_error(9) ✨

okay so real talk, this little cutie lives in the Kernel API Manual and she is literally a KUnit test for the AMD display DMUB AUX transfer path 🦋 buckle up bestie, it's a short one but it's iconic.

🌸 SYNOPSIS 🌸

void dm_test_process_dmub_aux_transfer_sync_protocol_error (struct kunit
*test );

🎀 ARGUMENTS 🎀

  • test — the KUnit test context 💅 that's it, that's the whole argument, she only needs one thing and honestly? respect.

💖 DESCRIPTION 💖

Okay so picture this: the completion is pre-signaled going in, and there's a fake DC DMUB service that straight up rejects the command after construction 🙈. Under those conditions, the sync helper is supposed to propagate the notification result — and here's the slay part — without waiting for real firmware. no cap, no hardware, no drama, just vibes and a mock service doing its little job 👑

it's giving "test the error path so production never has to" energy fr fr 🫶

🔥 SEE ALSO 🔥

Kernel file — ./drivers/gpu/drm/amd/display/amdgpu_dm/tests/amdgpu_dm_dmub_test.c 📁 (go read the source, iykyk)

and the whole squad, in order, no crumbs left behind:

ngl there are no options, no exit statuses, no environment variables, no signals and no bugs listed here — this page is just a test description and her friend group 💀 don't go looking for flags bestie, they're not coming.

and that's the whole page!! mwah 💋 this one's sourced from ./drivers/gpu/drm/amd/display/... and stamped October 2026 — so like, future icon behavior honestly 🌈⭐ go forth and run your KUnit tests, bestie, the protocol error path is covered 🧚‍♀️💜

📦 where this page comes from