snd_hda_gen...power_filter(9)

💅 snd_hda_gen...power_filter — from the Kernel API Manual bestie 🎀

okay so this is a page about snd_hda_gen_path_power_filter, living in the Kernel API Manual, and honestly? it's a little guy with one job and it does it beautifully. let's get into it ✨

🌸 NAME 🌸

snd_hda_gen_path_power_filter — the power_filter hook whose whole thing is making inactive widgets go into power down 💤 no cap, that's literally it, that's the gig.

✨ SYNOPSIS ✨

unsigned int snd_hda_gen_path_power_filter (struct hda_codec *codec ,
hda_nid_t nid , unsigned int power_state );

like... look at her. iconic signature, zero notes 🫶

🦋 ARGUMENTS 🦋

• codec — the HDA codec 💖 the main character of this whole situation
• nid — the NID to evaluate 🔍 (this is the one getting the vibe check)
• power_state — the target power state ⚡ the destination, the goal, the dream

👑 SEE ALSO 👑

this is the friend group and they're all in the same kernel file, ./sound/hda/codecs/generic.c — go say hi to all of them 🌈

• snd_hda_gen_spec_init(9)
• snd_hda_gen_add_kctl(9)
• snd_hda_get_path_idx(9)
• snd_hda_get_path_from_idx(9)
• snd_hda_add_new_path(9)
• snd_hda_activate_path(9)
• snd_hda_gen_add_mute_led_cdev(9)
• snd_hda_gen_add_micmute_led_cdev(9)
• snd_hda_gen_fix_pin_power(9)
• snd_hda_gen_update_outputs(9)
• snd_hda_gen_hp_automute(9)
• snd_hda_gen_line_automute(9)
• snd_hda_gen_mic_autoswitch(9)
• snd_hda_gen_stream_pm(9)
• snd_hda_gen_shutup_speakers(9)
• snd_hda_gen_parse_auto_config(9)
• snd_hda_gen_build_controls(9)
• snd_hda_gen_build_pcms(9)
• snd_hda_gen_init(9)
• snd_hda_gen_remove(9)
• snd_hda_gen_check_power_status(9)

real talk bestie: the source of all this is ./sound/hda/codecs, the version/date stamp says October 2026, and the page goes by snd_hda_gen...power_filter(9). mwah, that's the whole sign-off 💋 slay, go read the source, ily 🧚‍♀️💜