snd_pcm_subs...ma_direction(9)

💅 snd_pcm_subs...ma_direction(9) 💅

okay so bestie, welcome to the Kernel API Manual — yes it's a whole manual, and yes this page is short, but that just means we can give it the attention it deserves. 🎀

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✨ NAME ✨

snd_pcm_substream_to_dma_direction — literally just here to hand you the dma_transfer_direction for a PCM substream. that's it. that's the whole job. iconic behavior honestly 🫶

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🌸 SYNOPSIS 🌸

enum dma_transfer_direction snd_pcm_substream_to_dma_direction (const
struct snd_pcm_substream *substream );

no cap, that's the exact signature — copy it character for character if you're writing it out, bestie. 💖

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🦋 ARGUMENTS 🦋

• substream — your PCM substream. that's the one and only thing you're passing in here. 🎀

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⭐ RETURN ⭐

it returns the DMA transfer direction. that's the vibe check result, periodt. ✨

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🔥 SEE ALSO 🔥

• Kernel file ./include/sound/dmaengine_pcm.h — go look, iykyk 👀
• struct snd_dmaengine_dai_dma_data(9)
• struct snd_dmaengine_pcm_config(9)

like, these are your besties for this one — check them out fr fr. 💜

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lowkey a tiny page but every detail still ate, no skips, no summaries. 🌈

and that's the whole thing, bestie — sending you off with all the love 💅✨

source path ./include/sound, dated October 2026 — mwah, go slay those substreams 🧚‍♀️💖