dm_mst_test...am_aux_error(9)

📦 version 7.3.1, in nixpkgs unstable

✨ dm_mst_test_retrieve_downstream_aux_error ✨

okay so bestie, welcome to the <pink>Kernel API Manual</pink>, section 9 — yes we're in the big-kid kernel docs today, and honestly? iconic behavior only. 🎀

This one's a little KUnit test function, and it's literally here to check one very specific thing. Let's get into it 💅

🌸 NAME 🌸

dm_mst_test_retrieve_downstream_aux_error — bestie, this is the Test downstream read failure girlie. That's the whole job. 🦋

🌈 SYNOPSIS 🌈

void dm_mst_test_retrieve_downstream_aux_error (struct kunit *test );

like, no cap, that's the whole signature. she returns void (nothing back, she's not about that return-value life) and takes exactly one arg. periodt. 👑

💖 ARGUMENTS 💖

  • test — the KUnit test context 🧚. that's it, that's the vibe. it's the little test-framework situation that knows what's up.

🔥 DESCRIPTION 🔥

so the tea ☕ is: this test verifies that retrieve_downstream_port_device returns false when the AUX DPCD read fails. 💀

like — deliberately break the read, then confirm the function goes "nope, false, not today" instead of pretending everything's fine. main character energy from the error handling, honestly. 🙈

🫶 SEE ALSO 🫶

📁 Kernel file

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

that's the file, go read it, she's right there ✨

👯 the whole friend group (aka the other tests)

she does not roll alone, bestie. here's the entire squad, all (9):

slay. that's 41 besties and every single one of them is in the group chat. 💜

ngl this one's a test page, so there's no scary warnings, no deprecated flags, no undefined-behavior jumpscare — just a clean little "does the failure path fail correctly" check. lowkey the healthiest kind of manpage. 🍓

and that's the whole page, bestie 🫶 — brought to you by the source path ./drivers/gpu/drm/amd/display/..., dated October 2026, and yes the footer is giving very much "see you next semester" energy. stay hydrated, keep your tests green, dm_mst_test...am_aux_error(9) out 💅✨🌸

📦 where this page comes from