virtsnd_pcm_trigger(9)

💖 NAME 💖

virtsnd_pcm_trigger — okay so this is the function that processes the command for the PCM substream, periodt. This is the virtsnd_pcm_trigger(9) page straight from the Kernel API Manual, and yes bestie, we're getting into it. ✨

🎀 SYNOPSIS 🎀

int virtsnd_pcm_trigger (struct snd_pcm_substream *substream , int
       command );

No cap, that's the whole signature. 💅

🌸 ARGUMENTS 🌸

• substream — the Kernel ALSA substream, aka the main character here. 🎧
• command — the substream command, with values from the SNDRV_PCM_TRIGGER_XXX family. 🦋

✨ CONTEXT ✨

Any context, bestie — no specific context restriction. It takes and releases the VirtIO substream spinlock, and it may also take and release the tx/rx queue spinlock. 🔥

💜 RETURN 💜

0 on success, and -errno on failure. Slay when it's zero, cry when it's -errno. 😭

🌈 SEE ALSO 🌈

Kernel file ./sound/virtio/virtio_pcm_ops.c — that's the spot. 👑

• virtsnd_pcm_open(9)
• virtsnd_pcm_close(9)
• virtsnd_pcm_dev_set_params(9)
• virtsnd_pcm_hw_params(9)
• virtsnd_pcm_hw_free(9)
• virtsnd_pcm_prepare(9)
• virtsnd_pcm_sync_stop(9)
• virtsnd_pcm_pb_pointer(9)
• virtsnd_pcm_cp_pointer(9)

okay bye bestie — source/version ./sound/virtio, date October 2026 💅✨🫶