snd_hdac_dsp_prepare(9)

📦 version 7.3.1, in nixpkgs unstable

💖 snd_hdac_dsp_prepare(9) 💖

okay so this is a page from the Kernel API Manual, bestie — it's all about snd_hdac_dsp_prepare, and no cap, it's the little function that gets your HD-audio stream all cute and ready for DSP loading. 🎀

✨ NAME ✨

snd_hdac_dsp_prepare — prepare for DSP loading 🫶

🌸 SYNOPSIS 🌸

int snd_hdac_dsp_prepare (struct hdac_stream *azx_dev , unsigned int
format , unsigned int byte_size , struct snd_dma_buffer *bufp );

🦋 ARGUMENTS 🦋

  • azx_dev — the HD-audio core stream that's doing the DSP loading. this is your main character right here 👑
  • format — the HD-audio stream format. it's giving "how do we sound" energy ✨
  • byte_size — how big the data chunk is, in bytes. literally just the size, ngl 💅
  • bufp — the buffer that got allocated. here's where it lives 🏠

💜 DESCRIPTION 💜

So what it does: it allocates the buffer for whatever size you asked for, and sets up the stream you handed it so it's ready for DSP loading. that's the whole vibe check 🧚

Then it returns the stream tag (which is >= 0), or a negative error code if things went sideways. so like — non-negative means slay, negative means 😭.

bestie pls actually check that return value, a negative error code is not it 🙈

🔥 SEE ALSO 🔥

Kernel file ./sound/hda/core/stream.c — and honestly the whole friend group is here:

and that's the whole page, periodt 💅 this icon lives in ./sound/hda/core, and the version/date stamp on it is October 2026 — so like, future vibes only, iykyk 🌈⭐💖

📦 where this page comes from