psc_dma_trigger(9)

💅 psc_dma_trigger

okay bestie, so this is a page from the Kernel API Manual — it's literally called psc_dma_trigger, and the whole vibe is "press play, press stop, but for DMA." ✨

🌸 NAME

psc_dma_trigger — start and stop the DMA transfer.

That's it. That's the job. Iconic honestly.

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🎀 SYNOPSIS

int psc_dma_trigger (struct snd_soc_component *component , struct
snd_pcm_substream *substream , int cmd );

so it returns an int, and it takes three things — a component, a substream, and a cmd. keep those exactly as they are, no cap. 🫶

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🦋 ARGUMENTS

• component — the component that got triggered. that's the one waking up and doing the work 💅
• substream — the substream that got triggered. the actual stream of audio in question ✨
• cmd — the command that got triggered. this is the "what am i supposed to do rn" part 👑

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🔥 DESCRIPTION

so basically ALSA calls this function whenever it needs the DMA transfer of data to start, stop, pause, or resume. that's the whole range of moods. it's giving "one function, four jobs, main character energy." 😭

no extra lore, no hidden behaviour — those four actions are literally the entire resume. periodt.

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👑 SEE ALSO

• Kernel file ./sound/soc/fsl/mpc5200_dma.c 💖
• psc_dma_bcom_enqueue_next_buffer(9) ✨

like, go read the source, iykyk. 🧚

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ngl bestie, that's the whole page — no bugs section, no warnings, no env vars, not even one error code. sometimes a manpage is just short and cute like that. 🌈

literalllyyy sourced from the ./sound/soc/fsl directory, dated October 2026, and that's the tea 🍓💜 — mwah, see u in the kernel tree 🎀⭐