snd_hwparams...slave_config(9)

okay bestie, welcome to the snd_hwparams...slave_config(9) page from the Kernel API Manual — yes, the title is a whole vibe, but the function inside is the real main character 💅

✨ NAME ✨

snd_hwparams_to_dma_slave_config — the glow-up that converts hw_params to dma_slave_config 🎀

🎀 SYNOPSIS 🎀

int snd_hwparams_to_dma_slave_config (const struct snd_pcm_substream
*substream , const struct snd_pcm_hw_params *params , struct
dma_slave_config *slave_config );

💖 ARGUMENTS 💖

• substream — PCM substream, aka the stream bestie we're working with 🌊
• params — hw_params, the hardware-params cutie
• slave_config — DMA slave config, the destination baddie 💅

🦋 DESCRIPTION 🦋

so this function can be used to initialize a dma_slave_config from a substream and hw_params in a dmaengine based PCM driver implementation. That's the whole flex ✨

🌸 RETURN 🌸

zero if successful, or a negative error code. no cap, that's the return vibe 😭

🔥 SEE ALSO 🔥

• Kernel file ./sound/core/pcm_dmaengine.c 👀
• snd_dmaengine_pcm_set_config_from_dai_data(9)
• snd_dmaengine_pcm_trigger(9)
• snd_dmaengine_pcm_pointer_no_residue(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)

kisses and kernel hugs 🫶 — source/version: ./sound/core; date: October 2026; and this page is giving manual-page royalty 👑