snd_hda_chec...p_list_power(9)

💅 snd_hda_check_amp_list_power — Kernel API Manual ✨

okay so bestie, welcome to the glow-up era of <pink>snd_hda_check_amp_list_power</pink> 🎀 this one lives in the Kernel API Manual, and it's literally the vibe-check function for amp lists and power status. let's get into it 🫶

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🌸 NAME 🌸

<purple>snd_hda_check_amp_list_power</purple> — check the amp list and update the power ✨

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🦋 SYNOPSIS 🦋

int snd_hda_check_amp_list_power (struct hda_codec *codec , struct
       hda_loopback_check *check , hda_nid_t nid );

no cap, that's the whole signature 💅

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🍓 ARGUMENTS 🍓

• codec — the HD-audio codec, bestie. it's the main character here 👑
• check — the object containing an AMP list and the status. two jobs, one struct, we stan a multitasker 💖
• nid — the NID to check / update 🔍

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🌈 DESCRIPTION 🌈

so what does it actually do? here's the tea ☕

It checks whether the given NID is in the amp list. that's step one, the vibe check 💅

If it is in the list, then it checks the current AMP status, and updates the power-status according to the mute status. slay — mute state in, power state out, iconic behaviour fr fr ✨

also important: this function is supposed to be set or called from the check_power_status patch ops. not me dropping that little detail on you — it's literally in the spec so write it down 📝

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🔥 SEE ALSO 🔥

okay this part is a lot, and I mean a LOT — this function is literally the most popular girl in school, here's the whole group chat 👑:

Kernel file ./sound/hda/common/codec.c, then: snd_hda_sequence_write(9), snd_hda_get_conn_list(9), snd_hda_get_connections(9), snd_hda_override_conn_list(9), snd_hda_get_conn_index(9), snd_hda_get_num_devices(9), snd_hda_get_devices(9), snd_hda_get_dev_select(9), snd_hda_set_dev_select(9), snd_hda_codec_set_pincfg(9), snd_hda_codec_get_pincfg(9), snd_hda_codec_set_pin_target(9), snd_hda_codec_get_pin_target(9), snd_hda_shutup_pins(9), snd_hda_codec_cleanup_for_unbind(9), snd_hda_codec_register(9), snd_hda_codec_unregister(9), snd_hda_codec_device_init(9), snd_hda_codec_new(9), snd_hda_codec_update_widgets(9), snd_hda_codec_setup_stream(9), __snd_hda_codec_cleanup_stream(9), query_amp_caps(9), snd_hda_check_amp_caps(9), snd_hda_override_amp_caps(9), snd_hda_codec_amp_update(9), snd_hda_codec_amp_stereo(9), snd_hda_codec_amp_init(9), snd_hda_codec_amp_init_stereo(9), snd_hda_mixer_amp_volume_info(9), snd_hda_mixer_amp_volume_get(9), snd_hda_mixer_amp_volume_put(9), snd_hda_mixer_amp_tlv(9), snd_hda_set_vmaster_tlv(9), snd_hda_find_mixer_ctl(9), snd_hda_ctl_add(9), snd_hda_ctls_clear(9), snd_hda_lock_devices(9), snd_hda_unlock_devices(9), snd_hda_codec_reset(9), __snd_hda_add_vmaster(9), snd_hda_add_vmaster_hook(9), snd_hda_sync_vmaster_hook(9), snd_hda_mixer_amp_switch_info(9), snd_hda_mixer_amp_switch_get(9), snd_hda_mixer_amp_switch_put(9), snd_hda_create_dig_out_ctls(9), snd_hda_spdif_out_of_nid(9), snd_hda_spdif_ctls_unassign(9), snd_hda_spdif_ctls_assign(9), snd_hda_create_spdif_share_sw(9), snd_hda_create_spdif_in_ctls(9), snd_hda_codec_set_power_to_all(9), snd_hda_codec_eapd_power_filter(9), snd_hda_codec_prepare(9), snd_hda_codec_cleanup(9), snd_hda_add_new_ctls(9), snd_hda_codec_set_power_save(9), snd_hda_set_power_save(9), snd_hda_input_mux_info(9), snd_hda_input_mux_put(9), snd_hda_enum_helper_info(9), snd_hda_multi_out_dig_open(9), snd_hda_multi_out_dig_prepare(9), snd_hda_multi_out_dig_cleanup(9), snd_hda_multi_out_dig_close(9), snd_hda_multi_out_analog_open(9), snd_hda_multi_out_analog_prepare(9), snd_hda_multi_out_analog_cleanup(9), snd_hda_get_default_vref(9), snd_hda_correct_pin_ctl(9), _snd_hda_set_pin_ctl(9), snd_hda_add_imux_item(9), snd_hda_bus_reset_codecs(9), snd_hda_codec_set_gpio(9), snd_print_pcm_bits(9).

like I said. popular. 💀

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🧚 quick heads-up bestie: that ./sound/hda/common/codec.c is the kernel file to go peek at, and everything above is exactly as listed — don't come for me if you need one I didn't invent, because I invented nothing 🙈

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and that's the page!! mwah 💋 this one came from <lavender>./sound/hda/common</lavender>, dated October 2026, in the Kernel API Manual — see you in the next one, ily, bye 🎀💖🌸