snd_dmaengin...r_no_residue(9)

💖 snd_dmaengine_pcm_pointer_no_residue(9) 💖

okay bestie, welcome to the Kernel API Manual ✨ — this one's a lil retro, the header even shows up all truncated and mysterious like snd_dmaengin...r_no_residue(9) (iykyk), but the full name is snd_dmaengine_pcm_pointer_no_residue and we're gonna get into it 🎀

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✨ NAME ✨

snd_dmaengine_pcm_pointer_no_residue — the dmaengine-based PCM pointer implementation, aka the pointer vibe check for your DMA engine 🦋

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🌸 SYNOPSIS 🌸

snd_pcm_uframes_t snd_dmaengine_pcm_pointer_no_residue (struct snd_pcm_substream *substream );

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🎀 ARGUMENTS 🎀

• substream — the PCM substream, literally the one you're asking about 💅

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💀 DESCRIPTION 💀

so this function is deprecated and new drivers should NOT use it, because its results may be unreliable 😭 not me warning you before you even commit — it's giving "do not cite the deep magic to me" energy fr fr. if you're writing a shiny new driver, this is not the main character you want.

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⭐ RETURN ⭐

returns the PCM position in frames 🫶

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🌈 SEE ALSO 🌈

Kernel file ./sound/core/pcm_dmaengine.c 👑

• snd_hwparams_to_dma_slave_config(9)
• snd_dmaengine_pcm_set_config_from_dai_data(9)
• snd_dmaengine_pcm_trigger(9)
• snd_dmaengine_pcm_pointer(9)
• snd_dmaengine_pcm_request_channel(9)
• snd_dmaengine_pcm_open(9)
• snd_dmaengine_pcm_close(9)
• snd_dmaengine_pcm_close_release_chan(9)
• snd_dmaengine_pcm_refine_runtime_hwparams(9)

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ngl bestie, if you got here looking for the modern pointer, go peek at snd_dmaengine_pcm_pointer(9) — but that's all I'm saying, no extra lore 👀

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okay that's the whole page, mwah 💋 sign-off time: this masterpiece lives in ./sound/core, dated October 2026, and it's from the Kernel API Manual. slay, bye! 🌸💖✨