snd_hda_get_default_vref(9)

🌸 NAME 🌸

okay bestie, this is the snd_hda_get_default_vref(9) page from the Kernel API Manual 💖 and it's literally here to get the default (mic) VREF pin bits. short, sweet, iconic.

✨ SYNOPSIS ✨

unsigned int snd_hda_get_default_vref (struct hda_codec *codec ,
       hda_nid_t pin );

🎀 ARGUMENTS 🎀

• codec — the HDA codec. that's the codec in question, bestie.
• pin — referred pin NID. literally the pin NID being referred to.

🦋 DESCRIPTION 🦋

okay so the whole vibe: it guesses the suitable VREF pin bits to be set as the pin-control value. that's the function. no cap.

💅 NOTE 💅

heads up, important: the function doesn't set the AC_PINCTL_IN_EN bit. not me forgetting to mention that 😭

👑 SEE ALSO 👑

the whole friend group is here — full roll call, exact names, no skips:

Kernel file ./sound/hda/common/codec.c
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_check_amp_list_power(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_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)

mwah 💋 this page's source/version line is ./sound/hda/common, dated October 2026 — take care of her, bestie 🫶✨