snd_soc_runtime_action(9)

💅 snd_soc_runtime_action(9) — like, the kernel API manual bestie ✨

okay so this is a page from the Kernel API Manual, and the function we're obsessing over today is snd_soc_runtime_action 💖 it's giving "small function, big responsibilities," and honestly? she ate.

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🌸 NAME 🌸

snd_soc_runtime_action — increments/decrements the active count for PCM runtime components 🎀

like yes, that's literally what she does. no cap.

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✨ SYNOPSIS ✨

void snd_soc_runtime_action (struct snd_soc_pcm_runtime *rtd , int
stream , int action );

that's the whole vibe. three arguments, zero notes. 💅

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🫶 ARGUMENTS 🫶

• rtd — the ASoC PCM runtime that's getting activated 👑 this is your main character right here.
• stream — the direction of the PCM stream 🌈 (yes, direction matters, don't come for me)
• action — activate the stream if it's 1. deactivate it if it's -1. that's it, those are the two moods 💀

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🦋 DESCRIPTION 🦋

so what actually happens? she increments/decrements the active count for all the DAIs and components attached to a PCM runtime 🔥 all of them. every single one. no skipping.

you should typically call her when a stream is opened 🌸 that's her moment, her time to shine, her calling fr fr.

⚠️ important bestie: this must be called with the rtd->card->pcm_mutex being held. like, actually. don't try it without the lock, that's not the move 🙈

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💜 SEE ALSO 💜

• Kernel file ./sound/soc/soc-pcm.c — go read the source, iykyk 👀
• snd_soc_runtime_ignore_pmdown_time(9)
• snd_soc_runtime_calc_hw(9)

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and that's the page!! 🎀 sourced from ./sound/soc, dated October 2026, and titled snd_soc_runtime_action(9) — mwah, go forth and hold that mutex 💖✨🧚