cs_dsp_power_up(9)

📦 version 7.3.1, in nixpkgs unstable

💅 cs_dsp_power_up(9) — like, the Kernel API Manual, but make it make sense

okay so bestie, we're in the Kernel API Manual today and the main character is cs_dsp_power_up — yes it's a 9, yes that means kernel API, no you don't have to be scared. sit down, hydrate, let's go 🫶

✨ NAME ✨

cs_dsp_power_up — downloads firmware to the DSP 💾✨

🎀 SYNOPSIS 🎀

int cs_dsp_power_up (struct cs_dsp *dsp , const struct firmware
*wmfw_firmware , const char *wmfw_filename , const struct firmware
*coeff_firmware , const char *coeff_filename , const char *fw_name );

like, six arguments. she's high maintenance but she delivers 🔥

🌸 ARGUMENTS 🌸

  • dsp — pointer to the DSP structure. your main character pointer, the whole vibe lives in here 👑
  • wmfw_firmware — the firmware to be sent 📦
  • wmfw_filename — file name of firmware to be sent. yes, the name, it's a whole separate thing, don't @ me
  • coeff_firmware — the coefficient data to be sent 🍓
  • coeff_filename — file name of coefficient to data be sent. that's the original phrasing, I'm not touching it, it's iconic in its own chaotic way 😭
  • fw_name — the user-friendly firmware name. the cute little display name, the nickname, the pet name 💖

🦋 DESCRIPTION 🦋

okay so this function is for ADSP2 and Halo DSP cores, periodt. what it does: it powers up the DSP core and downloads the firmware — but it does not start the firmware running. that's the whole thing. it's giving "getting ready, not going out" energy 💅

the cs_dsp booted flag will be set once this is completed ✅

and if the core has a low-power memory retention mode, it gets put into that state after the firmware is downloaded 😴✨ so like, booted, fed, and then napping. relatable.

ngl, do not assume the firmware is running after this call. it is downloaded, not started. that is literally the entire point of the function.

🌈 RETURN 🌈

Zero for success 🎉, a negative number on error 💀 fr fr.

⭐ SEE ALSO ⭐

Kernel file ./drivers/firmware/cirrus/cs_dsp.c — go read the source, iykyk 📖

and the whole friend group, all of them, no one left out:

and that's the page, bestie 🧚💜 this little masterpiece lives in ./drivers/firmware/cirrus and it's dated October 2026 — yes, the future, she's ahead of her time ⏰✨ mwah, go power up some DSPs responsibly 💋

📦 where this page comes from