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ALSA: hda - More kerneldoc comments

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Put more kerneldoc comments to the exported functions.
Still the generic parser code and the HD-audio controller code aren't
covered yet, though.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2014-10-29 16:03:58 +01:00
parent a11e9b1686
commit 95a962c36f
6 changed files with 297 additions and 19 deletions
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51
sound/pci/hda/hda_auto_parser.c
View file

@ -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,

38
sound/pci/hda/hda_beep.c
View file

@ -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)
{

148
sound/pci/hda/hda_codec.c
View file

@ -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)

39
sound/pci/hda/hda_jack.c
View file

@ -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;

5
sound/pci/hda/hda_jack.h
View file

@ -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;

35
sound/pci/hda/hda_sysfs.c
View file

@ -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)
{