snd_ac97_pcm_open(9)

📦 version 7.3.1, in nixpkgs unstable

💖 snd_ac97_pcm_open — bestie's guide to the Kernel API Manual 💖

okay so picture this: it's giving kernel API manual, it's giving audio codec realness, and the function we're stanning today is snd_ac97_pcm_open. yes, that's the whole name. she's long, she's iconic, she opens the given AC97 pcm. periodt. 🎀

✨ NAME ✨

snd_ac97_pcm_open — opens the given AC97 pcm 🦋

no like literally, that's the job. that's the whole vibe. 🫶

🌸 SYNOPSIS 🌸

int snd_ac97_pcm_open (struct ac97_pcm *pcm , unsigned int rate , enum
ac97_pcm_cfg cfg , unsigned short slots );

look at her go. four whole arguments, all lined up, main character energy. 💅

🧚 ARGUMENTS 🧚

  • pcm — the ac97 pcm instance 💜 like, the actual object you're working with. your girl.
  • rate — rate in Hz. ⚠️ but listen: if the codec does not support VRA, this value must be 48000Hz. no cap, do not test her on this one.
  • cfg — output stream characteristics 🌈 the whole personality of the stream, honestly.
  • slots — a subset of allocated slots (the ones you sorted out with snd_ac97_pcm_assign) for this pcm 🎀 a subset, bestie, not the whole buffet.

🔥 DESCRIPTION 🔥

okay so what does she actually do? two things, and she does them well:

  • it locks the specified slots 🔒
  • and it sets the given rate to the AC97 registers ✨

that's it. that's the function. lowkey elegant, highkey essential. 👑

⭐ RETURN ⭐

  • Zero if successful 🎉 slay, we love a zero.
  • a negative error code on failure 😭 which, yeah, that's the kernel's way of saying "no ❤️".

🦋 SEE ALSO 🦋

all her sisters, all iconic, all worth a read fr fr 💖

💀 reminder bestie: that rate thing is not a suggestion. no VRA support = 48000Hz, full stop.

and that's the page!! brought to you from ./sound/pci/ac97, dated October 2026 🗓️✨ mwah, go open some pcms responsibly, ily 💜🌸🫶

📦 where this page comes from