qcom_snd_sdw_startup(9)

Hey bestie <3

so like, welcome to the manual page for qcom_snd_sdw_startup(9) — it's a kernel API vibe check and honestly it's giving "helper function that just wants to help" energy, periodt. 💅✨

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🎀 NAME 🎀

qcom_snd_sdw_startup — bestie, this is the helper that starts up the Soundwire stream situation for your SoC audio card. no cap, that's literally what it does 🎧🦋

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✨ SYNOPSIS ✨

int qcom_snd_sdw_startup (struct snd_pcm_substream *substream );

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💖 ARGUMENTS 💖

• substream — the PCM substream from audio, exactly as it gets passed to snd_soc_ops->startup. that's the whole argument, she's lowkey simple like that 🌸

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🌈 DESCRIPTION 🌈

okay so this is the helper for the SoC audio card (you know, the snd_soc_ops->startup moment 👑) and her whole job is to allocate and set the Soundwire stream runtime to each codec DAI. like she's handing out backstage passes to every DAI, iconic behavior honestly 🎫✨

🚨 important bestie alert: the shutdown callback should call sdw_release_stream on the same sdw_stream_runtime. don't forget to clean up, we don't leave streams hanging, that's not the vibe 😤💀

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🫶 RETURN 🫶

0 or errno. that's it. that's the tea. 🍓

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🦋 SEE ALSO 🦋

the kernel file at ./sound/soc/qcom/sdw.c — go read it, iykyk 📖💜

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made with love from ./sound/soc/qcom in October 2026 — mwah, slay, bye bestie!! 🧚💖🔥