snd_hdac_make_cmd(9)

📦 version 7.3.1, in nixpkgs unstable

💅 snd_hdac_make_cmd — the Kernel API Manual, bestie edition 🎀

Hii so this is a page from the Kernel API Manual (snd_hdac_make_cmd(9)) and it's genuinely the most underrated little helper in the HD-audio core, no cap. Sit down, grab a strawberry drink 🍓, and let's get into it.

✨ NAME ✨

snd_hdac_make_cmd — compose a 32bit command word to be sent to the HD-audio controller. That's it, that's the whole gig. It builds the word, you send it. Main character energy 🔥

🦋 SYNOPSIS 🦋

unsigned int snd_hdac_make_cmd (struct hdac_device *codec , hda_nid_t
nid , unsigned int verb , unsigned int parm );

Four things in, one unsigned int out. Iconic signature tbh 💅

🌸 ARGUMENTS 🌸

  • codec — the codec object. This is the whole vibe, the device you're talking about 🫶
  • nid — the NID to encode. Yes, that NID. The node id. It goes in the command. Slay.
  • verb — the verb to encode. The actual thing you're asking the codec to do.
  • parm — the parameter to encode. The lil extra detail that rides along with the verb.

💖 DESCRIPTION 💖

Return an encoded command verb or -1 for error.

That's literally it, bestie — that's the entire description on this page. It makes the word, it hands it back to you, or it hands you -1 if something went sideways. Not me being obsessed with a function that just returns a number 😭

Heads up: -1 here is the error signal. If you get that back, the command did not get composed properly, so don't go yeeting it at the controller. 🙈

👑 SEE ALSO 👑

Kernel file ./sound/hda/core/device.c, plus the whole friend group:

Like, the whole squad is here. Go read them too, iykyk 🌈

⭐ and that's the page!! ⭐ This one comes from the source dir ./sound/hda/core, dated October 2026, and the whole thing lives under the title snd_hdac_make_cmd(9) — go compose some commands, bestie, you've got this 💜🧚

📦 where this page comes from