cs_dsp_coeff...d_write_ctrl(9)

📦 version 7.3.1, in nixpkgs unstable

💫 cs_dsp_coeff_lock_and_write_ctrl — the Kernel API Manual, bestie edition 🎀

okay so real talk, this page is from the Kernel API Manual and it's literally the lock-and-write glow-up of a coefficient control function. it's giving "responsible friend who remembers to lock the door" energy and honestly? we stan. 💅

✨ NAME ✨

cs_dsp_coeff_lock_and_write_ctrl — writes the given buffer to the given coefficient control 🫶

🌸 SYNOPSIS 🌸

int cs_dsp_coeff_lock_and_write_ctrl (struct cs_dsp_coeff_ctl *ctl ,
unsigned int off , const void *buf , size_t len );

🦋 ARGUMENTS 🦋

  • ctl — pointer to coefficient control. this is your main character, the control you're writing to 👑
  • off — word offset at which data should be written. note the word word — it's word offset, not byte offset, iykyk ⭐
  • buf — the buffer to write to the given control. this is the payload, the actual vibes you're sending 💖
  • len — the length of the buffer in bytes. yes, bytes here — the offset is words, the length is bytes, and that's just how it is 🙈

🔥 DESCRIPTION 🔥

Same as cs_dsp_coeff_write_ctrl but takes pwr_lock. that's it, that's the whole description — but honestly that one little lock is doing a LOT of work. it's the difference between "chaotic group project" and "chaotic group project with a designated adult." 🧚

no cap: if you were hoping for extra lore here, there isn't any. the original says exactly this much and we're not out here making things up 💀

⭐ RETURN ⭐

  • a negative number on error 😭
  • 1 when the control value changed 🎉
  • 0 when it has not 😌

so like — negative means bad, 1 means slay, 0 means "nothing moved, but we're fine." three moods, one int. iconic.

🌈 SEE ALSO 🌈

that's the whole friend group, all present and accounted for, no one left on read 💜

and that's the page!! brought to you by ./drivers/firmware/cirrus, dated October 2026, and titled cs_dsp_coeff...d_write_ctrl(9) — yes the title is truncated in the source, no we did not fix it, that's just her name 💅✨

📦 where this page comes from