diff options
| -rw-r--r-- | sound/pci/hda/hda_auto_parser.c | 51 | ||||
| -rw-r--r-- | sound/pci/hda/hda_beep.c | 38 | ||||
| -rw-r--r-- | sound/pci/hda/hda_codec.c | 148 | ||||
| -rw-r--r-- | sound/pci/hda/hda_jack.c | 39 | ||||
| -rw-r--r-- | sound/pci/hda/hda_jack.h | 5 | ||||
| -rw-r--r-- | sound/pci/hda/hda_sysfs.c | 35 |
6 files changed, 297 insertions, 19 deletions
diff --git a/sound/pci/hda/hda_auto_parser.c b/sound/pci/hda/hda_auto_parser.c index 7388958b01af..1ede82200ee5 100644 --- a/sound/pci/hda/hda_auto_parser.c +++ b/sound/pci/hda/hda_auto_parser.c @@ -441,6 +441,13 @@ int snd_hda_parse_pin_defcfg(struct hda_codec *codec, } EXPORT_SYMBOL_GPL(snd_hda_parse_pin_defcfg); +/** + * snd_hda_get_input_pin_attr - Get the input pin attribute from pin config + * @def_conf: pin configuration value + * + * Guess the input pin attribute (INPUT_PIN_ATTR_XXX) from the given + * default pin configuration value. + */ int snd_hda_get_input_pin_attr(unsigned int def_conf) { unsigned int loc = get_defcfg_location(def_conf); @@ -473,7 +480,6 @@ EXPORT_SYMBOL_GPL(snd_hda_get_input_pin_attr); * for mic and line-in pins, and set an appropriate prefix like "Front", * "Rear", "Internal". */ - static const char *hda_get_input_pin_label(struct hda_codec *codec, const struct auto_pin_cfg_item *item, hda_nid_t pin, bool check_location) @@ -761,6 +767,14 @@ int snd_hda_get_pin_label(struct hda_codec *codec, hda_nid_t nid, } EXPORT_SYMBOL_GPL(snd_hda_get_pin_label); +/** + * snd_hda_add_verbs - Add verbs to the init list + * @codec: the HDA codec + * @list: zero-terminated verb list to add + * + * Append the given verb list to the execution list. The verbs will be + * performed at init and resume time via snd_hda_apply_verbs(). + */ int snd_hda_add_verbs(struct hda_codec *codec, const struct hda_verb *list) { @@ -773,6 +787,10 @@ int snd_hda_add_verbs(struct hda_codec *codec, } EXPORT_SYMBOL_GPL(snd_hda_add_verbs); +/** + * snd_hda_apply_verbs - Execute the init verb lists + * @codec: the HDA codec + */ void snd_hda_apply_verbs(struct hda_codec *codec) { int i; @@ -783,6 +801,11 @@ void snd_hda_apply_verbs(struct hda_codec *codec) } EXPORT_SYMBOL_GPL(snd_hda_apply_verbs); +/** + * snd_hda_apply_pincfgs - Set each pin config in the given list + * @codec: the HDA codec + * @cfg: NULL-terminated pin config table + */ void snd_hda_apply_pincfgs(struct hda_codec *codec, const struct hda_pintbl *cfg) { @@ -850,6 +873,11 @@ static void apply_fixup(struct hda_codec *codec, int id, int action, int depth) } } +/** + * snd_hda_apply_fixup - Apply the fixup chain with the given action + * @codec: the HDA codec + * @action: fixup action (HDA_FIXUP_ACT_XXX) + */ void snd_hda_apply_fixup(struct hda_codec *codec, int action) { if (codec->fixup_list) @@ -868,6 +896,12 @@ static bool pin_config_match(struct hda_codec *codec, return true; } +/** + * snd_hda_pick_pin_fixup - Pick up a fixup matching with the pin quirk list + * @codec: the HDA codec + * @pin_quirk: zero-terminated pin quirk list + * @fixlist: the fixup list + */ void snd_hda_pick_pin_fixup(struct hda_codec *codec, const struct snd_hda_pin_quirk *pin_quirk, const struct hda_fixup *fixlist) @@ -894,6 +928,21 @@ void snd_hda_pick_pin_fixup(struct hda_codec *codec, } EXPORT_SYMBOL_GPL(snd_hda_pick_pin_fixup); +/** + * snd_hda_pick_fixup - Pick up a fixup matching with PCI/codec SSID or model string + * @codec: the HDA codec + * @models: NULL-terminated model string list + * @quirk: zero-terminated PCI/codec SSID quirk list + * @fixlist: the fixup list + * + * Pick up a fixup entry matching with the given model string or SSID. + * If a fixup was already set beforehand, the function doesn't do anything. + * When a special model string "nofixup" is given, also no fixup is applied. + * + * The function tries to find the matching model name at first, if given. + * If nothing matched, try to look up the PCI SSID. + * If still nothing matched, try to look up the codec SSID. + */ void snd_hda_pick_fixup(struct hda_codec *codec, const struct hda_model_fixup *models, const struct snd_pci_quirk *quirk, diff --git a/sound/pci/hda/hda_beep.c b/sound/pci/hda/hda_beep.c index 8c6c50afc0b7..1e7de08e77cb 100644 --- a/sound/pci/hda/hda_beep.c +++ b/sound/pci/hda/hda_beep.c @@ -175,6 +175,11 @@ static int snd_hda_do_attach(struct hda_beep *beep) return 0; } +/** + * snd_hda_enable_beep_device - Turn on/off beep sound + * @codec: the HDA codec + * @enable: flag to turn on/off + */ int snd_hda_enable_beep_device(struct hda_codec *codec, int enable) { struct hda_beep *beep = codec->beep; @@ -191,6 +196,20 @@ int snd_hda_enable_beep_device(struct hda_codec *codec, int enable) } EXPORT_SYMBOL_GPL(snd_hda_enable_beep_device); +/** + * snd_hda_attach_beep_device - Attach a beep input device + * @codec: the HDA codec + * @nid: beep NID + * + * Attach a beep object to the given widget. If beep hint is turned off + * explicitly or beep_mode of the codec is turned off, this doesn't nothing. + * + * The attached beep device has to be registered via + * snd_hda_register_beep_device() and released via snd_hda_detach_beep_device() + * appropriately. + * + * Currently, only one beep device is allowed to each codec. + */ int snd_hda_attach_beep_device(struct hda_codec *codec, int nid) { struct hda_beep *beep; @@ -228,6 +247,10 @@ int snd_hda_attach_beep_device(struct hda_codec *codec, int nid) } EXPORT_SYMBOL_GPL(snd_hda_attach_beep_device); +/** + * snd_hda_detach_beep_device - Detach the beep device + * @codec: the HDA codec + */ void snd_hda_detach_beep_device(struct hda_codec *codec) { struct hda_beep *beep = codec->beep; @@ -240,6 +263,10 @@ void snd_hda_detach_beep_device(struct hda_codec *codec) } EXPORT_SYMBOL_GPL(snd_hda_detach_beep_device); +/** + * snd_hda_register_beep_device - Register the beep device + * @codec: the HDA codec + */ int snd_hda_register_beep_device(struct hda_codec *codec) { struct hda_beep *beep = codec->beep; @@ -269,6 +296,12 @@ static bool ctl_has_mute(struct snd_kcontrol *kcontrol) } /* get/put callbacks for beep mute mixer switches */ + +/** + * snd_hda_mixer_amp_switch_get_beep - Get callback for beep controls + * @kcontrol: ctl element + * @ucontrol: pointer to get/store the data + */ int snd_hda_mixer_amp_switch_get_beep(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { @@ -283,6 +316,11 @@ int snd_hda_mixer_amp_switch_get_beep(struct snd_kcontrol *kcontrol, } EXPORT_SYMBOL_GPL(snd_hda_mixer_amp_switch_get_beep); +/** + * snd_hda_mixer_amp_switch_put_beep - Put callback for beep controls + * @kcontrol: ctl element + * @ucontrol: pointer to get/store the data + */ int snd_hda_mixer_amp_switch_put_beep(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c index e15254204c72..ca98f5209f8f 100644 --- a/sound/pci/hda/hda_codec.c +++ b/sound/pci/hda/hda_codec.c @@ -77,6 +77,10 @@ static struct hda_vendor_id hda_vendor_ids[] = { static DEFINE_MUTEX(preset_mutex); static LIST_HEAD(hda_preset_tables); +/** + * snd_hda_add_codec_preset - Add a codec preset to the chain + * @preset: codec preset table to add + */ int snd_hda_add_codec_preset(struct hda_codec_preset_list *preset) { mutex_lock(&preset_mutex); @@ -86,6 +90,10 @@ int snd_hda_add_codec_preset(struct hda_codec_preset_list *preset) } EXPORT_SYMBOL_GPL(snd_hda_add_codec_preset); +/** + * snd_hda_delete_codec_preset - Delete a codec preset from the chain + * @preset: codec preset table to delete + */ int snd_hda_delete_codec_preset(struct hda_codec_preset_list *preset) { mutex_lock(&preset_mutex); @@ -1187,7 +1195,16 @@ unsigned int snd_hda_codec_get_pincfg(struct hda_codec *codec, hda_nid_t nid) } EXPORT_SYMBOL_GPL(snd_hda_codec_get_pincfg); -/* remember the current pinctl target value */ +/** + * snd_hda_codec_set_pin_target - remember the current pinctl target value + * @codec: the HDA codec + * @nid: pin NID + * @val: assigned pinctl value + * + * This function stores the given value to a pinctl target value in the + * pincfg table. This isn't always as same as the actually written value + * but can be referred at any time via snd_hda_codec_get_pin_target(). + */ int snd_hda_codec_set_pin_target(struct hda_codec *codec, hda_nid_t nid, unsigned int val) { @@ -1201,7 +1218,11 @@ int snd_hda_codec_set_pin_target(struct hda_codec *codec, hda_nid_t nid, } EXPORT_SYMBOL_GPL(snd_hda_codec_set_pin_target); -/* return the current pinctl target value */ +/** + * snd_hda_codec_get_pin_target - return the current pinctl target value + * @codec: the HDA codec + * @nid: pin NID + */ int snd_hda_codec_get_pin_target(struct hda_codec *codec, hda_nid_t nid) { struct hda_pincfg *pin; @@ -1573,6 +1594,13 @@ int snd_hda_codec_new(struct hda_bus *bus, } EXPORT_SYMBOL_GPL(snd_hda_codec_new); +/** + * snd_hda_codec_update_widgets - Refresh widget caps and pin defaults + * @codec: the HDA codec + * + * Forcibly refresh the all widget caps and the init pin configurations of + * the given codec. + */ int snd_hda_codec_update_widgets(struct hda_codec *codec) { hda_nid_t fg; @@ -2239,7 +2267,17 @@ int snd_hda_codec_amp_stereo(struct hda_codec *codec, hda_nid_t nid, } EXPORT_SYMBOL_GPL(snd_hda_codec_amp_stereo); -/* Works like snd_hda_codec_amp_update() but it writes the value only at +/** + * snd_hda_codec_amp_init - initialize the AMP value + * @codec: the HDA codec + * @nid: NID to read the AMP value + * @ch: channel (left=0 or right=1) + * @dir: #HDA_INPUT or #HDA_OUTPUT + * @idx: the index value (only for input direction) + * @mask: bit mask to set + * @val: the bits value to set + * + * Works like snd_hda_codec_amp_update() but it writes the value only at * the first access. If the amp was already initialized / updated beforehand, * this does nothing. */ @@ -2250,6 +2288,17 @@ int snd_hda_codec_amp_init(struct hda_codec *codec, hda_nid_t nid, int ch, } EXPORT_SYMBOL_GPL(snd_hda_codec_amp_init); +/** + * snd_hda_codec_amp_init_stereo - initialize the stereo AMP value + * @codec: the HDA codec + * @nid: NID to read the AMP value + * @dir: #HDA_INPUT or #HDA_OUTPUT + * @idx: the index value (only for input direction) + * @mask: bit mask to set + * @val: the bits value to set + * + * Call snd_hda_codec_amp_init() for both stereo channels. + */ int snd_hda_codec_amp_init_stereo(struct hda_codec *codec, hda_nid_t nid, int dir, int idx, int mask, int val) { @@ -2644,7 +2693,10 @@ void snd_hda_ctls_clear(struct hda_codec *codec) snd_array_free(&codec->nids); } -/* pseudo device locking +/** + * snd_hda_lock_devices - pseudo device locking + * @bus: the BUS + * * toggle card->shutdown to allow/disallow the device access (as a hack) */ int snd_hda_lock_devices(struct hda_bus *bus) @@ -2681,6 +2733,10 @@ int snd_hda_lock_devices(struct hda_bus *bus) } EXPORT_SYMBOL_GPL(snd_hda_lock_devices); +/** + * snd_hda_unlock_devices - pseudo device unlocking + * @bus: the BUS + */ void snd_hda_unlock_devices(struct hda_bus *bus) { struct snd_card *card = bus->card; @@ -2867,7 +2923,7 @@ static int add_slave(struct hda_codec *codec, } /** - * snd_hda_add_vmaster - create a virtual master control and add slaves + * __snd_hda_add_vmaster - create a virtual master control and add slaves * @codec: HD-audio codec * @name: vmaster control name * @tlv: TLV data (optional) @@ -2970,10 +3026,15 @@ static struct snd_kcontrol_new vmaster_mute_mode = { .put = vmaster_mute_mode_put, }; -/* - * Add a mute-LED hook with the given vmaster switch kctl - * "Mute-LED Mode" control is automatically created and associated with - * the given hook. +/** + * snd_hda_add_vmaster_hook - Add a vmaster hook for mute-LED + * @codec: the HDA codec + * @hook: the vmaster hook object + * @expose_enum_ctl: flag to create an enum ctl + * + * Add a mute-LED hook with the given vmaster switch kctl. + * When @expose_enum_ctl is set, "Mute-LED Mode" control is automatically + * created and associated with the given hook. */ int snd_hda_add_vmaster_hook(struct hda_codec *codec, struct hda_vmaster_mute_hook *hook, @@ -2995,9 +3056,12 @@ int snd_hda_add_vmaster_hook(struct hda_codec *codec, } EXPORT_SYMBOL_GPL(snd_hda_add_vmaster_hook); -/* - * Call the hook with the current value for synchronization - * Should be called in init callback +/** + * snd_hda_sync_vmaster_hook - Sync vmaster hook + * @hook: the vmaster hook + * + * Call the hook with the current value for synchronization. + * Should be called in init callback. */ void snd_hda_sync_vmaster_hook(struct hda_vmaster_mute_hook *hook) { @@ -3599,7 +3663,11 @@ int snd_hda_create_dig_out_ctls(struct hda_codec *codec, } EXPORT_SYMBOL_GPL(snd_hda_create_dig_out_ctls); -/* get the hda_spdif_out entry from the given NID +/** + * snd_hda_spdif_out_of_nid - get the hda_spdif_out entry from the given NID + * @codec: the HDA codec + * @nid: widget NID + * * call within spdif_mutex lock */ struct hda_spdif_out *snd_hda_spdif_out_of_nid(struct hda_codec *codec, @@ -3616,6 +3684,13 @@ struct hda_spdif_out *snd_hda_spdif_out_of_nid(struct hda_codec *codec, } EXPORT_SYMBOL_GPL(snd_hda_spdif_out_of_nid); +/** + * snd_hda_spdif_ctls_unassign - Unassign the given SPDIF ctl + * @codec: the HDA codec + * @idx: the SPDIF ctl index + * + * Unassign the widget from the given SPDIF control. + */ void snd_hda_spdif_ctls_unassign(struct hda_codec *codec, int idx) { struct hda_spdif_out *spdif; @@ -3627,6 +3702,14 @@ void snd_hda_spdif_ctls_unassign(struct hda_codec *codec, int idx) } EXPORT_SYMBOL_GPL(snd_hda_spdif_ctls_unassign); +/** + * snd_hda_spdif_ctls_assign - Assign the SPDIF controls to the given NID + * @codec: the HDA codec + * @idx: the SPDIF ctl idx + * @nid: widget NID + * + * Assign the widget to the SPDIF control with the given index. + */ void snd_hda_spdif_ctls_assign(struct hda_codec *codec, int idx, hda_nid_t nid) { struct hda_spdif_out *spdif; @@ -3946,6 +4029,16 @@ void snd_hda_codec_flush_cache(struct hda_codec *codec) } EXPORT_SYMBOL_GPL(snd_hda_codec_flush_cache); +/** + * snd_hda_codec_set_power_to_all - Set the power state to all widgets + * @codec: the HDA codec + * @fg: function group (not used now) + * @power_state: the power state to set (AC_PWRST_*) + * + * Set the given power state to all widgets that have the power control. + * If the codec has power_filter set, it evaluates the power state and + * filter out if it's unchanged as D3. + */ void snd_hda_codec_set_power_to_all(struct hda_codec *codec, hda_nid_t fg, unsigned int power_state) { @@ -4010,7 +4103,15 @@ static unsigned int hda_sync_power_state(struct hda_codec *codec, return state; } -/* don't power down the widget if it controls eapd and EAPD_BTLENABLE is set */ +/** + * snd_hda_codec_eapd_power_filter - A power filter callback for EAPD + * @codec: the HDA codec + * @nid: widget NID + * @power_state: power state to evalue + * + * Don't power down the widget if it controls eapd and EAPD_BTLENABLE is set. + * This can be used a codec power_filter callback. + */ unsigned int snd_hda_codec_eapd_power_filter(struct hda_codec *codec, hda_nid_t nid, unsigned int power_state) @@ -4671,6 +4772,17 @@ static int set_pcm_default_values(struct hda_codec *codec, /* * codec prepare/cleanup entries */ +/** + * snd_hda_codec_prepare - Prepare a stream + * @codec: the HDA codec + * @hinfo: PCM information + * @stream: stream tag to assign + * @format: format id to assign + * @substream: PCM substream to assign + * + * Calls the prepare callback set by the codec with the given arguments. + * Clean up the inactive streams when successful. + */ int snd_hda_codec_prepare(struct hda_codec *codec, struct hda_pcm_stream *hinfo, unsigned int stream, @@ -4687,6 +4799,14 @@ int snd_hda_codec_prepare(struct hda_codec *codec, } EXPORT_SYMBOL_GPL(snd_hda_codec_prepare); +/** + * snd_hda_codec_cleanup - Prepare a stream + * @codec: the HDA codec + * @hinfo: PCM information + * @substream: PCM substream + * + * Calls the cleanup callback set by the codec with the given arguments. + */ void snd_hda_codec_cleanup(struct hda_codec *codec, struct hda_pcm_stream *hinfo, struct snd_pcm_substream *substream) diff --git a/sound/pci/hda/hda_jack.c b/sound/pci/hda/hda_jack.c index b2d81ab22fb0..e664307617bd 100644 --- a/sound/pci/hda/hda_jack.c +++ b/sound/pci/hda/hda_jack.c @@ -20,6 +20,16 @@ #include "hda_auto_parser.h" #include "hda_jack.h" +/** + * is_jack_detectable - Check whether the given pin is jack-detectable + * @codec: the HDA codec + * @nid: pin NID + * + * Check whether the given pin is capable to report the jack detection. + * The jack detection might not work by various reasons, e.g. the jack + * detection is prohibited in the codec level, the pin config has + * AC_DEFCFG_MISC_NO_PRESENCE bit, no unsol support, etc. + */ bool is_jack_detectable(struct hda_codec *codec, hda_nid_t nid) { if (codec->no_jack_detect) @@ -268,6 +278,14 @@ snd_hda_jack_detect_enable_callback(struct hda_codec *codec, hda_nid_t nid, } EXPORT_SYMBOL_GPL(snd_hda_jack_detect_enable_callback); +/** + * snd_hda_jack_detect_enable - Enable the jack detection on the given pin + * @codec: the HDA codec + * @nid: pin NID to enable jack detection + * + * Enable the jack detection with the default callback. Returns zero if + * successful or a negative error code. + */ int snd_hda_jack_detect_enable(struct hda_codec *codec, hda_nid_t nid) { return PTR_ERR_OR_ZERO(snd_hda_jack_detect_enable_callback(codec, nid, NULL)); @@ -410,6 +428,15 @@ static int __snd_hda_jack_add_kctl(struct hda_codec *codec, hda_nid_t nid, return 0; } +/** + * snd_hda_jack_add_kctl - Add a jack kctl for the given pin + * @codec: the HDA codec + * @nid: pin NID + * @name: the name string for the jack ctl + * @idx: the ctl index for the jack ctl + * + * This is a simple helper calling __snd_hda_jack_add_kctl(). + */ int snd_hda_jack_add_kctl(struct hda_codec *codec, hda_nid_t nid, const char *name, int idx) { @@ -552,6 +579,11 @@ static void call_jack_callback(struct hda_codec *codec, } } +/** + * snd_hda_jack_unsol_event - Handle an unsolicited event + * @codec: the HDA codec + * @res: the unsolicited event data + */ void snd_hda_jack_unsol_event(struct hda_codec *codec, unsigned int res) { struct hda_jack_tbl *event; @@ -567,6 +599,13 @@ void snd_hda_jack_unsol_event(struct hda_codec *codec, unsigned int res) } EXPORT_SYMBOL_GPL(snd_hda_jack_unsol_event); +/** + * snd_hda_jack_poll_all - Poll all jacks + * @codec: the HDA codec + * + * Poll all detectable jacks with dirty flag, update the status, call + * callbacks and call snd_hda_jack_report_sync() if any changes are found. + */ void snd_hda_jack_poll_all(struct hda_codec *codec) { struct hda_jack_tbl *jack = codec->jacktbl.list; diff --git a/sound/pci/hda/hda_jack.h b/sound/pci/hda/hda_jack.h index 13cb375454f6..b279e327a23b 100644 --- a/sound/pci/hda/hda_jack.h +++ b/sound/pci/hda/hda_jack.h @@ -72,6 +72,11 @@ enum { int snd_hda_jack_detect_state(struct hda_codec *codec, hda_nid_t nid); +/** + * snd_hda_jack_detect - Detect the jack + * @codec: the HDA codec + * @nid: pin NID to check jack detection + */ static inline bool snd_hda_jack_detect(struct hda_codec *codec, hda_nid_t nid) { return snd_hda_jack_detect_state(codec, nid) != HDA_JACK_NOT_PRESENT; diff --git a/sound/pci/hda/hda_sysfs.c b/sound/pci/hda/hda_sysfs.c index 9b49f156a12e..bef721592c3a 100644 --- a/sound/pci/hda/hda_sysfs.c +++ b/sound/pci/hda/hda_sysfs.c @@ -417,8 +417,13 @@ static DEVICE_ATTR_RW(user_pin_configs); static DEVICE_ATTR_WO(reconfig); static DEVICE_ATTR_WO(clear); -/* - * Look for hint string +/** + * snd_hda_get_hint - Look for hint string + * @codec: the HDA codec + * @key: the hint key string + * + * Look for a hint key/value pair matching with the given key string + * and returns the value string. If nothing found, returns NULL. */ const char *snd_hda_get_hint(struct hda_codec *codec, const char *key) { @@ -427,6 +432,15 @@ const char *snd_hda_get_hint(struct hda_codec *codec, const char *key) } EXPORT_SYMBOL_GPL(snd_hda_get_hint); +/** + * snd_hda_get_bool_hint - Get a boolean hint value + * @codec: the HDA codec + * @key: the hint key string + * + * Look for a hint key/value pair matching with the given key string + * and returns a boolean value parsed from the value. If no matching + * key is found, return a negative value. + */ int snd_hda_get_bool_hint(struct hda_codec *codec, const char *key) { const char *p; @@ -453,6 +467,16 @@ int snd_hda_get_bool_hint(struct hda_codec *codec, const char *key) } EXPORT_SYMBOL_GPL(snd_hda_get_bool_hint); +/** + * snd_hda_get_bool_hint - Get a boolean hint value + * @codec: the HDA codec + * @key: the hint key string + * @valp: pointer to store a value + * + * Look for a hint key/value pair matching with the given key string + * and stores the integer value to @valp. If no matching key is found, + * return a negative error code. Otherwise it returns zero. + */ int snd_hda_get_int_hint(struct hda_codec *codec, const char *key, int *valp) { const char *p; @@ -690,8 +714,11 @@ static int get_line_from_fw(char *buf, int size, size_t *fw_size_p, return 1; } -/* - * load a "patch" firmware file and parse it +/** + * snd_hda_load_patch - load a "patch" firmware file and parse it + * @bus: HD-audio bus + * @fw_size: the firmware byte size + * @fw_buf: the firmware data */ int snd_hda_load_patch(struct hda_bus *bus, size_t fw_size, const void *fw_buf) { |