snd_hdac_set_codec_wakeup(9)

💅 snd_hdac_set_codec_wakeup(9) — Kernel API Manual, section 9, bestie

okay so real talk, this is a page from the Kernel API Manual, section 9 — aka the big-girl kernel dev section, not your cute little userland commands. sit down, hydrate, and let's get into it 🫶

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✨ NAME ✨

snd_hdac_set_codec_wakeup — turn the HDMI/DP codec wakeup on or off, that's the whole gig 💅

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🌸 SYNOPSIS 🌸

int snd_hdac_set_codec_wakeup (struct hdac_bus *bus , bool enable );

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🎀 ARGUMENTS 🎀

• bus — the HDA core bus. yeah. that one. the bus bestie 🚌
• enable — literally just says whether you're enabling or disabling the wakeup. on or off. no in-between, no vibes-based middle ground 🙈

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🦋 DESCRIPTION 🦋

so this function has a very specific lane, okay? it's supposed to be used only by a HD-audio controller driver that needs to interact with the graphics driver. like, it's not for everybody. it's giving exclusive. it's giving invite-only 🧚

and when do you call it? during the chip reset — which, fun fact, also gets called at resume for updating the STATESTS register read 🔥 so yeah, reset energy and resume energy both.

returns zero for success, or a negative error code if it went sideways 😭 (classic kernel move).

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💜 SEE ALSO 💜

• Kernel file ./sound/hda/core/component.c
• snd_hdac_display_power(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)

all of these are the friend group, go say hi 👑

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ngl if you're here it's because you're writing an HD-audio controller driver and you need to talk to the graphics driver. main character energy. good luck bestie 💖

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⭐ and that's the page!! brought to you by ./sound/hda/core, dated October 2026 — mwah, ily, go reset a chip responsibly 🎀💜