snd_hdac_codec_write(9)

💅 snd_hdac_codec_write — the "fire and forget" command sender ✨

okay so bestie, welcome to the kernel API manual for snd_hdac_codec_write(9) 🎀 this one's a lil function from the HD-audio world and honestly she's giving "send it and don't look back" energy. let's get into it 💖

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✨ SYNOPSIS ✨

int snd_hdac_codec_write (struct hdac_device *hdac , hda_nid_t nid , int
       flags , unsigned int verb , unsigned int parm );

like, five args, one int back, no cap 🫶

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🌸 ARGUMENTS 🌸

• hdac — the HDAC device 💻 that's your main character, the thing you're talking to
• nid — the NID (node id) you're sending the command to 🎯
• flags — optional bit flags 🚩 yes babe, optional
• verb — the verb you're sending 📨 the actual vibe of the command
• parm — the parameter for the verb 🔢 the lil payload riding along

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💖 DESCRIPTION 💖

She sends a single command and does not wait for a response. literally "drop it and go" energy 💅 one command, zero patience.

Returns 0 if successful 👑 or a negative error code 😭 if it's not.

ngl, don't expect a reply from this one — the whole point is that she does not wait for a response. if you wanted the answer back you're in the wrong function, bestie 🙈

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🦋 SEE ALSO 🦋

kernel file ./sound/hda/core/device.c — that's where the magic lives, iykyk ⭐

okay so here's the whole friend group, all in (9):

snd_hdac_device_init(9), snd_hdac_device_exit(9), snd_hdac_device_register(9), snd_hdac_device_unregister(9), snd_hdac_device_set_chip_name(9), snd_hdac_codec_modalias(9), snd_hdac_make_cmd(9), snd_hdac_exec_verb(9), snd_hdac_read(9), _snd_hdac_read_parm(9), snd_hdac_read_parm_uncached(9), snd_hdac_override_parm(9), snd_hdac_get_sub_nodes(9), snd_hdac_refresh_widgets(9), snd_hdac_get_connections(9), snd_hdac_power_up(9), snd_hdac_power_down(9), snd_hdac_power_up_pm(9), snd_hdac_power_down_pm(9), snd_hdac_stream_format_bits(9), snd_hdac_stream_format(9), snd_hdac_spdif_stream_format(9), snd_hdac_query_supported_pcm(9), snd_hdac_is_supported_format(9), snd_hdac_codec_read(9), snd_hdac_check_power_state(9), snd_hdac_sync_power_state(9)

(you know snd_hdac_codec_read(9) is literally her twin sister with the opposite personality — she does wait around 😌💀)

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🌈 the cute sign-off 🌈

this beauty lives under ./sound/hda/core 💜, dated October 2026 🗓️, and it's part of the Kernel API Manual. that's the whole page, bestie — go forth and send your single command without waiting for a response, periodt 💅✨💖