cs_dsp_chunk_flush(9)

📦 version 7.3.1, in nixpkgs unstable

💖 cs_dsp_chunk_flush 💖

okay so bestie, welcome to the cs_dsp_chunk_flush(9) page — it's a Kernel API Manual moment, and honestly? iconic. this is the little function that swoops in at the end and makes sure nothing gets left behind. main character energy fr fr. 🎀

✨ NAME ✨

cs_dsp_chunk_flush — pad the remaining data with zero and commit it to the chunk 🫶

🌸 SYNOPSIS 🌸

int cs_dsp_chunk_flush (struct cs_dsp_chunk *ch );

🦋 ARGUMENTS 🦋

  • ch — pointer to the chunk structure 👑

💅 DESCRIPTION 💅

so here's the tea. cs_dsp_chunk_write only actually writes data out when a whole DSP word is ready to be written — like, it's very picky, it waits until it has a full word before it commits. which means (and this is the important part) it's totally possible that some data just... stays sitting in the cache, vibing. 😭

that's where this function comes in. cs_dsp_chunk_flush pads that leftover data with zeros up to a whole DSP word and then writes it out. so nothing gets abandoned, no cap. ✨

no leftover bytes left behind — the cache gets emptied out properly, padded with zeros, and sent on its way 💖

🔥 RETURN 🔥

  • Zero for success 🎉
  • A negative number on error 💀

🌈 SEE ALSO 🌈

kernel file ./drivers/firmware/cirrus/cs_dsp.c — go read it, iykyk 📖

and that's the whole page, bestie! 🍓 before you go — this one lives over in ./drivers/firmware/cirrus, dated October 2026, and it's page cs_dsp_chunk_flush(9) of the Kernel API Manual. slay, go flush those chunks 💜🧚

📦 where this page comes from