snd_hdac_display_power(9)

💅 snd_hdac_display_power(9) — the Kernel API Manual page, bestie edition 🎀

okay so first things first, the page is literally called snd_hdac_display_power(9) and it lives in the Kernel API Manual, and it's about to be your new hyperfixation. grab a strawberry 🍓 and let's go.

✨ NAME ✨

snd_hdac_display_power — power up / down the power refcount 👑

✨ SYNOPSIS ✨

void snd_hdac_display_power (struct hdac_bus *bus , unsigned int idx ,
       bool enable );

✨ ARGUMENTS ✨

• bus — the HDA core bus, your main character struct 💖
• idx — the HDA codec address. and listen: pass HDA_CODEC_IDX_CONTROLLER if you're doing the controller thing, not the codec thing, iykyk 🫶
• enable — literally just power up or down. that's the whole vibe check ⭐

✨ DESCRIPTION ✨

so this function is used by either the HD-audio controller or the codec driver — whichever one needs to interact with the graphics driver. two icons, one mission 💅

and what does it actually do?? it updates the power status, and calls the get_power and put_power ops accordingly, toggling the codec wakeup too. no cap, that's the whole move ✨

✨ SEE ALSO ✨

• the kernel file ./sound/hda/core/component.c 📁 (yes, that's the path, keep it)
• snd_hdac_set_codec_wakeup(9) 🧚
• snd_hdac_sync_audio_rate(9) 🦋
• snd_hdac_acomp_get_eld(9) 🌸
• snd_hdac_acomp_register_notifier(9) 🔥
• snd_hdac_acomp_init(9) 💜
• snd_hdac_acomp_exit(9) 👑

go read those too, bestie, they're all in their iconic era.

ok that's literally the whole page, no notes 🙈

and that's a wrap!! this one comes to you from ./sound/hda/core, dated October 2026, and it's snd_hdac_display_power(9) forever and always 💖🎀🦋 slay!!