snd_pcm_prepare(9)

💖 snd_pcm_prepare(9) — Kernel API Manual 💖

okay so bestie, welcome to the glow-up era of snd_pcm_prepare 💅 this one lives in the Kernel API Manual and she's literally the "get your PCM substream ready to be triggered" girlie. no cap, that's the whole vibe. 🎀

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✨ NAME ✨

snd_pcm_prepare — get the PCM substream all prepped and ready to be triggerable 🫶

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🌸 SYNOPSIS 🌸

int snd_pcm_prepare (struct snd_pcm_substream *substream , struct file *file );

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🦋 ARGUMENTS 🦋

• substream — the PCM substream instance bestie, like, the actual thing we're prepping 💖
• file — the file you pass in so it can go peek at f_flags 👀

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⭐ RETURN ⭐

Zero if it slayed (success ✨), or a negative error code if it did not eat 😭

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👑 SEE ALSO 👑

Kernel file ./sound/core/pcm_native.c — go read her, she's iconic 📖 and also these besties:

• snd_pcm_stream_lock(9)
• snd_pcm_stream_unlock(9)
• snd_pcm_stream_lock_irq(9)
• snd_pcm_stream_unlock_irq(9)
• snd_pcm_stream_unlock_irqrestore(9)
• snd_pcm_set_state(9)
• snd_pcm_get_state(9)
• snd_pcm_hw_params_choose(9)
• snd_pcm_start(9)
• snd_pcm_stop(9)
• snd_pcm_drain_done(9)
• snd_pcm_stop_xrun(9)
• snd_pcm_suspend_all(9)
• snd_pcm_kernel_ioctl(9)
• snd_pcm_lib_default_mmap(9)
• snd_pcm_lib_mmap_iomem(9)

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and that's the whole page, periodt 💅 sourced from ./sound/core, dated October 2026 — mwah, go prep that substream bestie, iykyk 🌈💜