cs_dsp_coeff...cked_control(9)

💅 cs_dsp_coeff_write_acked_control(9) — a Kernel API Manual moment 🎀

okay so bestie, welcome to the Kernel API Manual, this is literally the page for cs_dsp_coeff_write_acked_control(9) and it's giving "small function, big personality" ✨. it's a real one, it lives in the kernel, and yes we're gonna read it together, no cap.

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✨ NAME ✨

cs_dsp_coeff_write_acked_control — sends event_id to the acked control 💌

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🌸 SYNOPSIS 🌸

int cs_dsp_coeff_write_acked_control (struct cs_dsp_coeff_ctl *ctl ,
unsigned int event_id );

like, that's the whole vibe. one function, two args, boom. 🫶

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🦋 ARGUMENTS 🦋

• ctl — pointer to the acked coefficient control. this is your main character, the thing you're writing into — it's gotta be an acked control, okurrr 👑
• event_id — the value you're writing to the given acked control. this is the actual payload, the little message you're sliding over there 🍓

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💜 DESCRIPTION 💜

so here's the tea ☕: once the value has been written to the control, the function shall block until the running firmware acknowledges the write, or until the timeout is exceeded. literally it just sits there and waits. patient queen energy 👑⏳

⚠️ ok this is the important bit, do NOT skip it: this must be called with pwr_lock held. like, that's not optional, that's the whole assignment. no lock, no vibes 💀

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🌈 RETURN 🌈

• Zero — success, we ate 🎉
• a negative number — error, it's giving flop 😭

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🔥 SEE ALSO 🔥

the kernel file, obviously:

./drivers/firmware/cirrus/cs_dsp.c

and then the whole friend group, fr fr — every single one of these besties:

cs_dsp_mem_region_name(9), cs_dsp_init_debugfs(9),
cs_dsp_cleanup_debugfs(9), cs_dsp_coeff_write_ctrl(9),
cs_dsp_coeff_lock_and_write_ctrl(9), cs_dsp_coeff_read_ctrl(9),
cs_dsp_coeff_lock_and_read_ctrl(9), cs_dsp_hibernate(9),
cs_dsp_get_ctl(9), cs_dsp_find_alg_region(9), cs_dsp_adsp1_init(9),
cs_dsp_adsp1_power_up(9), cs_dsp_adsp1_power_down(9),
cs_dsp_set_dspclk(9), cs_dsp_power_up(9), cs_dsp_power_down(9),
cs_dsp_run(9), cs_dsp_stop(9), cs_dsp_adsp2_init(9),
cs_dsp_halo_init(9), cs_dsp_remove(9), cs_dsp_read_raw_data_block(9),
cs_dsp_read_data_word(9), cs_dsp_write_data_word(9),
cs_dsp_remove_padding(9), cs_dsp_adsp2_bus_error(9),
cs_dsp_halo_bus_error(9), cs_dsp_halo_wdt_expire(9),
cs_dsp_chunk_write(9), cs_dsp_chunk_flush(9), cs_dsp_chunk_read(9),
cs_dsp_wseq_init(9), cs_dsp_wseq_write(9), cs_dsp_wseq_multi_write(9)

iykyk 💅

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and that's the page!! 🧚💖 it came from ./drivers/firmware/cirrus, it's dated October 2026, and it's officially signed off as cs_dsp_coeff...cked_control(9) — ily, go hold that pwr_lock bestie 🫶🎀⭐