snd_hdac_regmap_update_amp(9)

📦 version 7.3.1, in nixpkgs unstable

💖 snd_hdac_regmap_update_amp — update the AMP value 💖

okay so bestie, this is a page straight out of the Kernel API Manual, and it's all about snd_hdac_regmap_update_amp ✨ like the title literally says: it updates the AMP value. that's the whole vibe. let's get into it 🫶

✨ SYNOPSIS ✨

int snd_hdac_regmap_update_amp (struct hdac_device *codec , hda_nid_t
nid , int ch , int dir , int idx , int mask , int val );

that's the signature, copy it exactly, no cap 🔥

🎀 ARGUMENTS 🎀

  • codec — the HD-audio codec 💅 like, the whole device you're working on
  • nid — the NID you read the AMP value from
  • ch — the channel: left=0 or right=1 (pick ur fighter 🦋)
  • dir — either #HDA_INPUT or #HDA_OUTPUT, your direction bestie
  • idx — the index value (heads up: this one's only for input direction 👀)
  • mask — the bit mask to set
  • val — the bits value to set

🌸 DESCRIPTION 🌸

so what does it actually do?? it updates the AMP value with a bit mask ✨ that's it, that's the tea. mask in, value updated, slay 💅

⭐ RETURN ⭐

  • 0 if the value is unchanged (iconic, nothing happened)
  • 1 if changed (we moved!! 🔥)
  • or a negative error (😭 that's the sad path, handle it)

🦋 SEE ALSO 🦋

kernel file ./include/sound/hda_regmap.h — go read it, iykyk 📖

the whole friend group fr fr 🌈

ok that's the page!! sourced from ./include/sound in the kernel tree, dated October 2026, and it's the snd_hdac_regmap_update_amp(9) page 🎀 mwah, go update those AMP values bestie 💜🧚
📦 where this page comes from