dm_mst_test_...on_ack_reply(9)

📦 version 7.3.1, in nixpkgs unstable

💅 dm_mst_test_aux_transfer_non_ack_reply(9) — or, the Kernel API Manual page your bestie has been waiting for 🎀

okay so this is a page straight out of the Kernel API Manual, and it's about one very specific little KUnit test. it's giving "hyper-specific unit test that knows exactly what it is." let's get into it ✨

🌸 NAME 🌸

dm_mst_test_aux_transfer_non_ack_reply — bestie, the whole vibe is: a non-ACK AUX reply gets logged. that's it. that's the function. 💖

🦋 SYNOPSIS 🦋

void dm_mst_test_aux_transfer_non_ack_reply (struct kunit *test );

yep, that's the whole signature. void return, one arg, no cap. (yes there's a space before the closing paren in the original and we're keeping it, character for character, don't come for me 🙈)

✨ ARGUMENTS ✨

  • test — the KUnit test context. that's the whole thing. it's the little handle the test framework passes in so the test can do its thing. 🫶

💜 DESCRIPTION 💜

so here's what's happening, and honestly it's lowkey iconic: when you do a successful read and the reply byte is nonzero, the test wants to make sure the call still returns the backend byte count — while it's exercising the path that handles a non-ACK reply. 🔥

like, two things at once. it ate. periodt.

ngl the point of this test is exactly that combo — nonzero reply byte, still successful read, correct byte count, and the non-ACK reply handling path gets its moment in the spotlight. ⭐

🌈 SEE ALSO 🌈

okay buckle up bestie, this list is a whole friend group and we're naming every single one of them, no skipping 💀

Kernel file:

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

and the rest of the squad:

like I said. huge friend group. everyone showed up to the function-call party 🎉

and that's the whole page!! mwah 💋

cute little sign-off: this one lives under ./drivers/gpu/drm/amd/display/..., it's dated October 2026, and it answers to the name dm_mst_test_...on_ack_reply(9). go read the other tests bestie, they're all listed above and they're all waiting for you 🍓🧚‍♀️

📦 where this page comes from