blob: b9dc6acbba8c55661eb0cf423a02fb9b7dda1c87 [file] [log] [blame]
/*
* soc-dapm.c -- ALSA SoC Dynamic Audio Power Management
*
* Copyright 2005 Wolfson Microelectronics PLC.
* Author: Liam Girdwood <lrg@slimlogic.co.uk>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* Features:
* o Changes power status of internal codec blocks depending on the
* dynamic configuration of codec internal audio paths and active
* DACs/ADCs.
* o Platform power domain - can support external components i.e. amps and
* mic/headphone insertion events.
* o Automatic Mic Bias support
* o Jack insertion power event initiation - e.g. hp insertion will enable
* sinks, dacs, etc
* o Delayed power down of audio subsystem to reduce pops between a quick
* device reopen.
*
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/async.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/bitops.h>
#include <linux/platform_device.h>
#include <linux/jiffies.h>
#include <linux/debugfs.h>
#include <linux/pm_runtime.h>
#include <linux/regulator/consumer.h>
#include <linux/clk.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/initval.h>
#include <trace/events/asoc.h>
#define DAPM_UPDATE_STAT(widget, val) widget->dapm->card->dapm_stats.val++;
static int snd_soc_dapm_add_path(struct snd_soc_dapm_context *dapm,
struct snd_soc_dapm_widget *wsource, struct snd_soc_dapm_widget *wsink,
const char *control,
int (*connected)(struct snd_soc_dapm_widget *source,
struct snd_soc_dapm_widget *sink));
static struct snd_soc_dapm_widget *
snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
const struct snd_soc_dapm_widget *widget);
/* dapm power sequences - make this per codec in the future */
static int dapm_up_seq[] = {
[snd_soc_dapm_pre] = 0,
[snd_soc_dapm_regulator_supply] = 1,
[snd_soc_dapm_clock_supply] = 1,
[snd_soc_dapm_supply] = 2,
[snd_soc_dapm_micbias] = 3,
[snd_soc_dapm_dai_link] = 2,
[snd_soc_dapm_dai_in] = 4,
[snd_soc_dapm_dai_out] = 4,
[snd_soc_dapm_aif_in] = 4,
[snd_soc_dapm_aif_out] = 4,
[snd_soc_dapm_mic] = 5,
[snd_soc_dapm_mux] = 6,
[snd_soc_dapm_virt_mux] = 6,
[snd_soc_dapm_value_mux] = 6,
[snd_soc_dapm_dac] = 7,
[snd_soc_dapm_switch] = 8,
[snd_soc_dapm_mixer] = 8,
[snd_soc_dapm_mixer_named_ctl] = 8,
[snd_soc_dapm_pga] = 9,
[snd_soc_dapm_adc] = 10,
[snd_soc_dapm_out_drv] = 11,
[snd_soc_dapm_hp] = 11,
[snd_soc_dapm_spk] = 11,
[snd_soc_dapm_line] = 11,
[snd_soc_dapm_kcontrol] = 12,
[snd_soc_dapm_post] = 13,
};
static int dapm_down_seq[] = {
[snd_soc_dapm_pre] = 0,
[snd_soc_dapm_kcontrol] = 1,
[snd_soc_dapm_adc] = 2,
[snd_soc_dapm_hp] = 3,
[snd_soc_dapm_spk] = 3,
[snd_soc_dapm_line] = 3,
[snd_soc_dapm_out_drv] = 3,
[snd_soc_dapm_pga] = 4,
[snd_soc_dapm_switch] = 5,
[snd_soc_dapm_mixer_named_ctl] = 5,
[snd_soc_dapm_mixer] = 5,
[snd_soc_dapm_dac] = 6,
[snd_soc_dapm_mic] = 7,
[snd_soc_dapm_micbias] = 8,
[snd_soc_dapm_mux] = 9,
[snd_soc_dapm_virt_mux] = 9,
[snd_soc_dapm_value_mux] = 9,
[snd_soc_dapm_aif_in] = 10,
[snd_soc_dapm_aif_out] = 10,
[snd_soc_dapm_dai_in] = 10,
[snd_soc_dapm_dai_out] = 10,
[snd_soc_dapm_dai_link] = 11,
[snd_soc_dapm_supply] = 12,
[snd_soc_dapm_clock_supply] = 13,
[snd_soc_dapm_regulator_supply] = 13,
[snd_soc_dapm_post] = 14,
};
static void pop_wait(u32 pop_time)
{
if (pop_time)
schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
}
static void pop_dbg(struct device *dev, u32 pop_time, const char *fmt, ...)
{
va_list args;
char *buf;
if (!pop_time)
return;
buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
if (buf == NULL)
return;
va_start(args, fmt);
vsnprintf(buf, PAGE_SIZE, fmt, args);
dev_info(dev, "%s", buf);
va_end(args);
kfree(buf);
}
static bool dapm_dirty_widget(struct snd_soc_dapm_widget *w)
{
return !list_empty(&w->dirty);
}
void dapm_mark_dirty(struct snd_soc_dapm_widget *w, const char *reason)
{
if (!dapm_dirty_widget(w)) {
dev_vdbg(w->dapm->dev, "Marking %s dirty due to %s\n",
w->name, reason);
list_add_tail(&w->dirty, &w->dapm->card->dapm_dirty);
}
}
EXPORT_SYMBOL_GPL(dapm_mark_dirty);
void dapm_mark_io_dirty(struct snd_soc_dapm_context *dapm)
{
struct snd_soc_card *card = dapm->card;
struct snd_soc_dapm_widget *w;
mutex_lock(&card->dapm_mutex);
list_for_each_entry(w, &card->widgets, list) {
switch (w->id) {
case snd_soc_dapm_input:
case snd_soc_dapm_output:
dapm_mark_dirty(w, "Rechecking inputs and outputs");
break;
default:
break;
}
}
mutex_unlock(&card->dapm_mutex);
}
EXPORT_SYMBOL_GPL(dapm_mark_io_dirty);
/* create a new dapm widget */
static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
const struct snd_soc_dapm_widget *_widget)
{
return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
}
struct dapm_kcontrol_data {
unsigned int value;
struct snd_soc_dapm_widget *widget;
struct list_head paths;
struct snd_soc_dapm_widget_list *wlist;
};
static int dapm_kcontrol_data_alloc(struct snd_soc_dapm_widget *widget,
struct snd_kcontrol *kcontrol)
{
struct dapm_kcontrol_data *data;
struct soc_mixer_control *mc;
data = kzalloc(sizeof(*data), GFP_KERNEL);
if (!data) {
dev_err(widget->dapm->dev,
"ASoC: can't allocate kcontrol data for %s\n",
widget->name);
return -ENOMEM;
}
INIT_LIST_HEAD(&data->paths);
switch (widget->id) {
case snd_soc_dapm_switch:
case snd_soc_dapm_mixer:
case snd_soc_dapm_mixer_named_ctl:
mc = (struct soc_mixer_control *)kcontrol->private_value;
if (mc->autodisable) {
struct snd_soc_dapm_widget template;
memset(&template, 0, sizeof(template));
template.reg = mc->reg;
template.mask = (1 << fls(mc->max)) - 1;
template.shift = mc->shift;
if (mc->invert)
template.off_val = mc->max;
else
template.off_val = 0;
template.on_val = template.off_val;
template.id = snd_soc_dapm_kcontrol;
template.name = kcontrol->id.name;
data->value = template.on_val;
data->widget = snd_soc_dapm_new_control(widget->dapm,
&template);
if (!data->widget) {
kfree(data);
return -ENOMEM;
}
}
break;
default:
break;
}
kcontrol->private_data = data;
return 0;
}
static void dapm_kcontrol_free(struct snd_kcontrol *kctl)
{
struct dapm_kcontrol_data *data = snd_kcontrol_chip(kctl);
kfree(data->widget);
kfree(data->wlist);
kfree(data);
}
static struct snd_soc_dapm_widget_list *dapm_kcontrol_get_wlist(
const struct snd_kcontrol *kcontrol)
{
struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
return data->wlist;
}
static int dapm_kcontrol_add_widget(struct snd_kcontrol *kcontrol,
struct snd_soc_dapm_widget *widget)
{
struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
struct snd_soc_dapm_widget_list *new_wlist;
unsigned int n;
if (data->wlist)
n = data->wlist->num_widgets + 1;
else
n = 1;
new_wlist = krealloc(data->wlist,
sizeof(*new_wlist) + sizeof(widget) * n, GFP_KERNEL);
if (!new_wlist)
return -ENOMEM;
new_wlist->widgets[n - 1] = widget;
new_wlist->num_widgets = n;
data->wlist = new_wlist;
return 0;
}
static void dapm_kcontrol_add_path(const struct snd_kcontrol *kcontrol,
struct snd_soc_dapm_path *path)
{
struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
list_add_tail(&path->list_kcontrol, &data->paths);
if (data->widget) {
snd_soc_dapm_add_path(data->widget->dapm, data->widget,
path->source, NULL, NULL);
}
}
static bool dapm_kcontrol_is_powered(const struct snd_kcontrol *kcontrol)
{
struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
if (!data->widget)
return true;
return data->widget->power;
}
static struct list_head *dapm_kcontrol_get_path_list(
const struct snd_kcontrol *kcontrol)
{
struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
return &data->paths;
}
#define dapm_kcontrol_for_each_path(path, kcontrol) \
list_for_each_entry(path, dapm_kcontrol_get_path_list(kcontrol), \
list_kcontrol)
static unsigned int dapm_kcontrol_get_value(const struct snd_kcontrol *kcontrol)
{
struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
return data->value;
}
static bool dapm_kcontrol_set_value(const struct snd_kcontrol *kcontrol,
unsigned int value)
{
struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
if (data->value == value)
return false;
if (data->widget)
data->widget->on_val = value;
data->value = value;
return true;
}
/**
* snd_soc_dapm_kcontrol_codec() - Returns the codec associated to a kcontrol
* @kcontrol: The kcontrol
*/
struct snd_soc_codec *snd_soc_dapm_kcontrol_codec(struct snd_kcontrol *kcontrol)
{
return dapm_kcontrol_get_wlist(kcontrol)->widgets[0]->codec;
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_kcontrol_codec);
static void dapm_reset(struct snd_soc_card *card)
{
struct snd_soc_dapm_widget *w;
memset(&card->dapm_stats, 0, sizeof(card->dapm_stats));
list_for_each_entry(w, &card->widgets, list) {
w->new_power = w->power;
w->power_checked = false;
w->inputs = -1;
w->outputs = -1;
}
}
static int soc_widget_read(struct snd_soc_dapm_widget *w, int reg,
unsigned int *value)
{
if (w->codec) {
*value = snd_soc_read(w->codec, reg);
return 0;
} else if (w->platform) {
*value = snd_soc_platform_read(w->platform, reg);
return 0;
}
dev_err(w->dapm->dev, "ASoC: no valid widget read method\n");
return -1;
}
static int soc_widget_write(struct snd_soc_dapm_widget *w, int reg, int val)
{
if (w->codec)
return snd_soc_write(w->codec, reg, val);
else if (w->platform)
return snd_soc_platform_write(w->platform, reg, val);
dev_err(w->dapm->dev, "ASoC: no valid widget write method\n");
return -1;
}
static inline void soc_widget_lock(struct snd_soc_dapm_widget *w)
{
if (w->codec && !w->codec->using_regmap)
mutex_lock(&w->codec->mutex);
else if (w->platform)
mutex_lock(&w->platform->mutex);
}
static inline void soc_widget_unlock(struct snd_soc_dapm_widget *w)
{
if (w->codec && !w->codec->using_regmap)
mutex_unlock(&w->codec->mutex);
else if (w->platform)
mutex_unlock(&w->platform->mutex);
}
static void soc_dapm_async_complete(struct snd_soc_dapm_context *dapm)
{
if (dapm->codec && dapm->codec->using_regmap)
regmap_async_complete(dapm->codec->control_data);
}
static int soc_widget_update_bits_locked(struct snd_soc_dapm_widget *w,
unsigned short reg, unsigned int mask, unsigned int value)
{
bool change;
unsigned int old, new;
int ret;
if (w->codec && w->codec->using_regmap) {
ret = regmap_update_bits_check_async(w->codec->control_data,
reg, mask, value,
&change);
if (ret != 0)
return ret;
} else {
soc_widget_lock(w);
ret = soc_widget_read(w, reg, &old);
if (ret < 0) {
soc_widget_unlock(w);
return ret;
}
new = (old & ~mask) | (value & mask);
change = old != new;
if (change) {
ret = soc_widget_write(w, reg, new);
if (ret < 0) {
soc_widget_unlock(w);
return ret;
}
}
soc_widget_unlock(w);
}
return change;
}
/**
* snd_soc_dapm_set_bias_level - set the bias level for the system
* @dapm: DAPM context
* @level: level to configure
*
* Configure the bias (power) levels for the SoC audio device.
*
* Returns 0 for success else error.
*/
static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm,
enum snd_soc_bias_level level)
{
struct snd_soc_card *card = dapm->card;
int ret = 0;
trace_snd_soc_bias_level_start(card, level);
if (card && card->set_bias_level)
ret = card->set_bias_level(card, dapm, level);
if (ret != 0)
goto out;
if (dapm->codec) {
if (dapm->codec->driver->set_bias_level)
ret = dapm->codec->driver->set_bias_level(dapm->codec,
level);
else
dapm->bias_level = level;
} else if (!card || dapm != &card->dapm) {
dapm->bias_level = level;
}
if (ret != 0)
goto out;
if (card && card->set_bias_level_post)
ret = card->set_bias_level_post(card, dapm, level);
out:
trace_snd_soc_bias_level_done(card, level);
return ret;
}
/* set up initial codec paths */
static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
struct snd_soc_dapm_path *p, int i)
{
switch (w->id) {
case snd_soc_dapm_switch:
case snd_soc_dapm_mixer:
case snd_soc_dapm_mixer_named_ctl: {
int val;
struct soc_mixer_control *mc = (struct soc_mixer_control *)
w->kcontrol_news[i].private_value;
int reg = mc->reg;
unsigned int shift = mc->shift;
int max = mc->max;
unsigned int mask = (1 << fls(max)) - 1;
unsigned int invert = mc->invert;
if (reg != SND_SOC_NOPM) {
soc_widget_read(w, reg, &val);
val = (val >> shift) & mask;
if (invert)
val = max - val;
p->connect = !!val;
} else {
p->connect = 0;
}
}
break;
case snd_soc_dapm_mux: {
struct soc_enum *e = (struct soc_enum *)
w->kcontrol_news[i].private_value;
int val, item;
soc_widget_read(w, e->reg, &val);
item = (val >> e->shift_l) & e->mask;
if (item < e->max && !strcmp(p->name, e->texts[item]))
p->connect = 1;
else
p->connect = 0;
}
break;
case snd_soc_dapm_virt_mux: {
struct soc_enum *e = (struct soc_enum *)
w->kcontrol_news[i].private_value;
p->connect = 0;
/* since a virtual mux has no backing registers to
* decide which path to connect, it will try to match
* with the first enumeration. This is to ensure
* that the default mux choice (the first) will be
* correctly powered up during initialization.
*/
if (!strcmp(p->name, e->texts[0]))
p->connect = 1;
}
break;
case snd_soc_dapm_value_mux: {
struct soc_enum *e = (struct soc_enum *)
w->kcontrol_news[i].private_value;
int val, item;
soc_widget_read(w, e->reg, &val);
val = (val >> e->shift_l) & e->mask;
for (item = 0; item < e->max; item++) {
if (val == e->values[item])
break;
}
if (item < e->max && !strcmp(p->name, e->texts[item]))
p->connect = 1;
else
p->connect = 0;
}
break;
/* does not affect routing - always connected */
case snd_soc_dapm_pga:
case snd_soc_dapm_out_drv:
case snd_soc_dapm_output:
case snd_soc_dapm_adc:
case snd_soc_dapm_input:
case snd_soc_dapm_siggen:
case snd_soc_dapm_dac:
case snd_soc_dapm_micbias:
case snd_soc_dapm_vmid:
case snd_soc_dapm_supply:
case snd_soc_dapm_regulator_supply:
case snd_soc_dapm_clock_supply:
case snd_soc_dapm_aif_in:
case snd_soc_dapm_aif_out:
case snd_soc_dapm_dai_in:
case snd_soc_dapm_dai_out:
case snd_soc_dapm_hp:
case snd_soc_dapm_mic:
case snd_soc_dapm_spk:
case snd_soc_dapm_line:
case snd_soc_dapm_dai_link:
case snd_soc_dapm_kcontrol:
p->connect = 1;
break;
/* does affect routing - dynamically connected */
case snd_soc_dapm_pre:
case snd_soc_dapm_post:
p->connect = 0;
break;
}
}
/* connect mux widget to its interconnecting audio paths */
static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
struct snd_soc_dapm_path *path, const char *control_name,
const struct snd_kcontrol_new *kcontrol)
{
struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
int i;
for (i = 0; i < e->max; i++) {
if (!(strcmp(control_name, e->texts[i]))) {
list_add(&path->list, &dapm->card->paths);
list_add(&path->list_sink, &dest->sources);
list_add(&path->list_source, &src->sinks);
path->name = (char*)e->texts[i];
dapm_set_path_status(dest, path, 0);
return 0;
}
}
return -ENODEV;
}
/* connect mixer widget to its interconnecting audio paths */
static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
struct snd_soc_dapm_path *path, const char *control_name)
{
int i;
/* search for mixer kcontrol */
for (i = 0; i < dest->num_kcontrols; i++) {
if (!strcmp(control_name, dest->kcontrol_news[i].name)) {
list_add(&path->list, &dapm->card->paths);
list_add(&path->list_sink, &dest->sources);
list_add(&path->list_source, &src->sinks);
path->name = dest->kcontrol_news[i].name;
dapm_set_path_status(dest, path, i);
return 0;
}
}
return -ENODEV;
}
static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm,
struct snd_soc_dapm_widget *kcontrolw,
const struct snd_kcontrol_new *kcontrol_new,
struct snd_kcontrol **kcontrol)
{
struct snd_soc_dapm_widget *w;
int i;
*kcontrol = NULL;
list_for_each_entry(w, &dapm->card->widgets, list) {
if (w == kcontrolw || w->dapm != kcontrolw->dapm)
continue;
for (i = 0; i < w->num_kcontrols; i++) {
if (&w->kcontrol_news[i] == kcontrol_new) {
if (w->kcontrols)
*kcontrol = w->kcontrols[i];
return 1;
}
}
}
return 0;
}
/*
* Determine if a kcontrol is shared. If it is, look it up. If it isn't,
* create it. Either way, add the widget into the control's widget list
*/
static int dapm_create_or_share_mixmux_kcontrol(struct snd_soc_dapm_widget *w,
int kci)
{
struct snd_soc_dapm_context *dapm = w->dapm;
struct snd_card *card = dapm->card->snd_card;
const char *prefix;
size_t prefix_len;
int shared;
struct snd_kcontrol *kcontrol;
bool wname_in_long_name, kcname_in_long_name;
char *long_name;
const char *name;
int ret;
if (dapm->codec)
prefix = dapm->codec->name_prefix;
else
prefix = NULL;
if (prefix)
prefix_len = strlen(prefix) + 1;
else
prefix_len = 0;
shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[kci],
&kcontrol);
if (!kcontrol) {
if (shared) {
wname_in_long_name = false;
kcname_in_long_name = true;
} else {
switch (w->id) {
case snd_soc_dapm_switch:
case snd_soc_dapm_mixer:
wname_in_long_name = true;
kcname_in_long_name = true;
break;
case snd_soc_dapm_mixer_named_ctl:
wname_in_long_name = false;
kcname_in_long_name = true;
break;
case snd_soc_dapm_mux:
case snd_soc_dapm_virt_mux:
case snd_soc_dapm_value_mux:
wname_in_long_name = true;
kcname_in_long_name = false;
break;
default:
return -EINVAL;
}
}
if (wname_in_long_name && kcname_in_long_name) {
/*
* The control will get a prefix from the control
* creation process but we're also using the same
* prefix for widgets so cut the prefix off the
* front of the widget name.
*/
long_name = kasprintf(GFP_KERNEL, "%s %s",
w->name + prefix_len,
w->kcontrol_news[kci].name);
if (long_name == NULL)
return -ENOMEM;
name = long_name;
} else if (wname_in_long_name) {
long_name = NULL;
name = w->name + prefix_len;
} else {
long_name = NULL;
name = w->kcontrol_news[kci].name;
}
kcontrol = snd_soc_cnew(&w->kcontrol_news[kci], NULL, name,
prefix);
kfree(long_name);
if (!kcontrol)
return -ENOMEM;
kcontrol->private_free = dapm_kcontrol_free;
ret = dapm_kcontrol_data_alloc(w, kcontrol);
if (ret) {
snd_ctl_free_one(kcontrol);
return ret;
}
ret = snd_ctl_add(card, kcontrol);
if (ret < 0) {
dev_err(dapm->dev,
"ASoC: failed to add widget %s dapm kcontrol %s: %d\n",
w->name, name, ret);
return ret;
}
}
ret = dapm_kcontrol_add_widget(kcontrol, w);
if (ret)
return ret;
w->kcontrols[kci] = kcontrol;
return 0;
}
/* create new dapm mixer control */
static int dapm_new_mixer(struct snd_soc_dapm_widget *w)
{
int i, ret;
struct snd_soc_dapm_path *path;
/* add kcontrol */
for (i = 0; i < w->num_kcontrols; i++) {
/* match name */
list_for_each_entry(path, &w->sources, list_sink) {
/* mixer/mux paths name must match control name */
if (path->name != (char *)w->kcontrol_news[i].name)
continue;
if (w->kcontrols[i]) {
dapm_kcontrol_add_path(w->kcontrols[i], path);
continue;
}
ret = dapm_create_or_share_mixmux_kcontrol(w, i);
if (ret < 0)
return ret;
dapm_kcontrol_add_path(w->kcontrols[i], path);
}
}
return 0;
}
/* create new dapm mux control */
static int dapm_new_mux(struct snd_soc_dapm_widget *w)
{
struct snd_soc_dapm_context *dapm = w->dapm;
struct snd_soc_dapm_path *path;
int ret;
if (w->num_kcontrols != 1) {
dev_err(dapm->dev,
"ASoC: mux %s has incorrect number of controls\n",
w->name);
return -EINVAL;
}
if (list_empty(&w->sources)) {
dev_err(dapm->dev, "ASoC: mux %s has no paths\n", w->name);
return -EINVAL;
}
ret = dapm_create_or_share_mixmux_kcontrol(w, 0);
if (ret < 0)
return ret;
list_for_each_entry(path, &w->sources, list_sink)
dapm_kcontrol_add_path(w->kcontrols[0], path);
return 0;
}
/* create new dapm volume control */
static int dapm_new_pga(struct snd_soc_dapm_widget *w)
{
if (w->num_kcontrols)
dev_err(w->dapm->dev,
"ASoC: PGA controls not supported: '%s'\n", w->name);
return 0;
}
/* reset 'walked' bit for each dapm path */
static void dapm_clear_walk_output(struct snd_soc_dapm_context *dapm,
struct list_head *sink)
{
struct snd_soc_dapm_path *p;
list_for_each_entry(p, sink, list_source) {
if (p->walked) {
p->walked = 0;
dapm_clear_walk_output(dapm, &p->sink->sinks);
}
}
}
static void dapm_clear_walk_input(struct snd_soc_dapm_context *dapm,
struct list_head *source)
{
struct snd_soc_dapm_path *p;
list_for_each_entry(p, source, list_sink) {
if (p->walked) {
p->walked = 0;
dapm_clear_walk_input(dapm, &p->source->sources);
}
}
}
/* We implement power down on suspend by checking the power state of
* the ALSA card - when we are suspending the ALSA state for the card
* is set to D3.
*/
static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
{
int level = snd_power_get_state(widget->dapm->card->snd_card);
switch (level) {
case SNDRV_CTL_POWER_D3hot:
case SNDRV_CTL_POWER_D3cold:
if (widget->ignore_suspend)
dev_dbg(widget->dapm->dev, "ASoC: %s ignoring suspend\n",
widget->name);
return widget->ignore_suspend;
default:
return 1;
}
}
/* add widget to list if it's not already in the list */
static int dapm_list_add_widget(struct snd_soc_dapm_widget_list **list,
struct snd_soc_dapm_widget *w)
{
struct snd_soc_dapm_widget_list *wlist;
int wlistsize, wlistentries, i;
if (*list == NULL)
return -EINVAL;
wlist = *list;
/* is this widget already in the list */
for (i = 0; i < wlist->num_widgets; i++) {
if (wlist->widgets[i] == w)
return 0;
}
/* allocate some new space */
wlistentries = wlist->num_widgets + 1;
wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
wlistentries * sizeof(struct snd_soc_dapm_widget *);
*list = krealloc(wlist, wlistsize, GFP_KERNEL);
if (*list == NULL) {
dev_err(w->dapm->dev, "ASoC: can't allocate widget list for %s\n",
w->name);
return -ENOMEM;
}
wlist = *list;
/* insert the widget */
dev_dbg(w->dapm->dev, "ASoC: added %s in widget list pos %d\n",
w->name, wlist->num_widgets);
wlist->widgets[wlist->num_widgets] = w;
wlist->num_widgets++;
return 1;
}
/*
* Recursively check for a completed path to an active or physically connected
* output widget. Returns number of complete paths.
*/
static int is_connected_output_ep(struct snd_soc_dapm_widget *widget,
struct snd_soc_dapm_widget_list **list)
{
struct snd_soc_dapm_path *path;
int con = 0;
if (widget->outputs >= 0)
return widget->outputs;
DAPM_UPDATE_STAT(widget, path_checks);
switch (widget->id) {
case snd_soc_dapm_supply:
case snd_soc_dapm_regulator_supply:
case snd_soc_dapm_clock_supply:
case snd_soc_dapm_kcontrol:
return 0;
default:
break;
}
switch (widget->id) {
case snd_soc_dapm_adc:
case snd_soc_dapm_aif_out:
case snd_soc_dapm_dai_out:
if (widget->active) {
widget->outputs = snd_soc_dapm_suspend_check(widget);
return widget->outputs;
}
default:
break;
}
if (widget->connected) {
/* connected pin ? */
if (widget->id == snd_soc_dapm_output && !widget->ext) {
widget->outputs = snd_soc_dapm_suspend_check(widget);
return widget->outputs;
}
/* connected jack or spk ? */
if (widget->id == snd_soc_dapm_hp ||
widget->id == snd_soc_dapm_spk ||
(widget->id == snd_soc_dapm_line &&
!list_empty(&widget->sources))) {
widget->outputs = snd_soc_dapm_suspend_check(widget);
return widget->outputs;
}
}
list_for_each_entry(path, &widget->sinks, list_source) {
DAPM_UPDATE_STAT(widget, neighbour_checks);
if (path->weak)
continue;
if (path->walking)
return 1;
if (path->walked)
continue;
trace_snd_soc_dapm_output_path(widget, path);
if (path->sink && path->connect) {
path->walked = 1;
path->walking = 1;
/* do we need to add this widget to the list ? */
if (list) {
int err;
err = dapm_list_add_widget(list, path->sink);
if (err < 0) {
dev_err(widget->dapm->dev,
"ASoC: could not add widget %s\n",
widget->name);
path->walking = 0;
return con;
}
}
con += is_connected_output_ep(path->sink, list);
path->walking = 0;
}
}
widget->outputs = con;
return con;
}
/*
* Recursively check for a completed path to an active or physically connected
* input widget. Returns number of complete paths.
*/
static int is_connected_input_ep(struct snd_soc_dapm_widget *widget,
struct snd_soc_dapm_widget_list **list)
{
struct snd_soc_dapm_path *path;
int con = 0;
if (widget->inputs >= 0)
return widget->inputs;
DAPM_UPDATE_STAT(widget, path_checks);
switch (widget->id) {
case snd_soc_dapm_supply:
case snd_soc_dapm_regulator_supply:
case snd_soc_dapm_clock_supply:
case snd_soc_dapm_kcontrol:
return 0;
default:
break;
}
/* active stream ? */
switch (widget->id) {
case snd_soc_dapm_dac:
case snd_soc_dapm_aif_in:
case snd_soc_dapm_dai_in:
if (widget->active) {
widget->inputs = snd_soc_dapm_suspend_check(widget);
return widget->inputs;
}
default:
break;
}
if (widget->connected) {
/* connected pin ? */
if (widget->id == snd_soc_dapm_input && !widget->ext) {
widget->inputs = snd_soc_dapm_suspend_check(widget);
return widget->inputs;
}
/* connected VMID/Bias for lower pops */
if (widget->id == snd_soc_dapm_vmid) {
widget->inputs = snd_soc_dapm_suspend_check(widget);
return widget->inputs;
}
/* connected jack ? */
if (widget->id == snd_soc_dapm_mic ||
(widget->id == snd_soc_dapm_line &&
!list_empty(&widget->sinks))) {
widget->inputs = snd_soc_dapm_suspend_check(widget);
return widget->inputs;
}
/* signal generator */
if (widget->id == snd_soc_dapm_siggen) {
widget->inputs = snd_soc_dapm_suspend_check(widget);
return widget->inputs;
}
}
list_for_each_entry(path, &widget->sources, list_sink) {
DAPM_UPDATE_STAT(widget, neighbour_checks);
if (path->weak)
continue;
if (path->walking)
return 1;
if (path->walked)
continue;
trace_snd_soc_dapm_input_path(widget, path);
if (path->source && path->connect) {
path->walked = 1;
path->walking = 1;
/* do we need to add this widget to the list ? */
if (list) {
int err;
err = dapm_list_add_widget(list, path->source);
if (err < 0) {
dev_err(widget->dapm->dev,
"ASoC: could not add widget %s\n",
widget->name);
path->walking = 0;
return con;
}
}
con += is_connected_input_ep(path->source, list);
path->walking = 0;
}
}
widget->inputs = con;
return con;
}
/**
* snd_soc_dapm_get_connected_widgets - query audio path and it's widgets.
* @dai: the soc DAI.
* @stream: stream direction.
* @list: list of active widgets for this stream.
*
* Queries DAPM graph as to whether an valid audio stream path exists for
* the initial stream specified by name. This takes into account
* current mixer and mux kcontrol settings. Creates list of valid widgets.
*
* Returns the number of valid paths or negative error.
*/
int snd_soc_dapm_dai_get_connected_widgets(struct snd_soc_dai *dai, int stream,
struct snd_soc_dapm_widget_list **list)
{
struct snd_soc_card *card = dai->card;
int paths;
mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
dapm_reset(card);
if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
paths = is_connected_output_ep(dai->playback_widget, list);
dapm_clear_walk_output(&card->dapm,
&dai->playback_widget->sinks);
} else {
paths = is_connected_input_ep(dai->capture_widget, list);
dapm_clear_walk_input(&card->dapm,
&dai->capture_widget->sources);
}
trace_snd_soc_dapm_connected(paths, stream);
mutex_unlock(&card->dapm_mutex);
return paths;
}
/*
* Handler for generic register modifier widget.
*/
int dapm_reg_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol, int event)
{
unsigned int val;
if (SND_SOC_DAPM_EVENT_ON(event))
val = w->on_val;
else
val = w->off_val;
soc_widget_update_bits_locked(w, -(w->reg + 1),
w->mask << w->shift, val << w->shift);
return 0;
}
EXPORT_SYMBOL_GPL(dapm_reg_event);
/*
* Handler for regulator supply widget.
*/
int dapm_regulator_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol, int event)
{
int ret;
soc_dapm_async_complete(w->dapm);
if (SND_SOC_DAPM_EVENT_ON(event)) {
if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
ret = regulator_allow_bypass(w->regulator, false);
if (ret != 0)
dev_warn(w->dapm->dev,
"ASoC: Failed to unbypass %s: %d\n",
w->name, ret);
}
return regulator_enable(w->regulator);
} else {
if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
ret = regulator_allow_bypass(w->regulator, true);
if (ret != 0)
dev_warn(w->dapm->dev,
"ASoC: Failed to bypass %s: %d\n",
w->name, ret);
}
return regulator_disable_deferred(w->regulator, w->shift);
}
}
EXPORT_SYMBOL_GPL(dapm_regulator_event);
/*
* Handler for clock supply widget.
*/
int dapm_clock_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol, int event)
{
if (!w->clk)
return -EIO;
soc_dapm_async_complete(w->dapm);
#ifdef CONFIG_HAVE_CLK
if (SND_SOC_DAPM_EVENT_ON(event)) {
return clk_prepare_enable(w->clk);
} else {
clk_disable_unprepare(w->clk);
return 0;
}
#endif
return 0;
}
EXPORT_SYMBOL_GPL(dapm_clock_event);
static int dapm_widget_power_check(struct snd_soc_dapm_widget *w)
{
if (w->power_checked)
return w->new_power;
if (w->force)
w->new_power = 1;
else
w->new_power = w->power_check(w);
w->power_checked = true;
return w->new_power;
}
/* Generic check to see if a widget should be powered.
*/
static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
{
int in, out;
DAPM_UPDATE_STAT(w, power_checks);
in = is_connected_input_ep(w, NULL);
dapm_clear_walk_input(w->dapm, &w->sources);
out = is_connected_output_ep(w, NULL);
dapm_clear_walk_output(w->dapm, &w->sinks);
return out != 0 && in != 0;
}
/* Check to see if an ADC has power */
static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
{
int in;
DAPM_UPDATE_STAT(w, power_checks);
if (w->active) {
in = is_connected_input_ep(w, NULL);
dapm_clear_walk_input(w->dapm, &w->sources);
return in != 0;
} else {
return dapm_generic_check_power(w);
}
}
/* Check to see if a DAC has power */
static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
{
int out;
DAPM_UPDATE_STAT(w, power_checks);
if (w->active) {
out = is_connected_output_ep(w, NULL);
dapm_clear_walk_output(w->dapm, &w->sinks);
return out != 0;
} else {
return dapm_generic_check_power(w);
}
}
/* Check to see if a power supply is needed */
static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
{
struct snd_soc_dapm_path *path;
DAPM_UPDATE_STAT(w, power_checks);
/* Check if one of our outputs is connected */
list_for_each_entry(path, &w->sinks, list_source) {
DAPM_UPDATE_STAT(w, neighbour_checks);
if (path->weak)
continue;
if (path->connected &&
!path->connected(path->source, path->sink))
continue;
if (!path->sink)
continue;
if (dapm_widget_power_check(path->sink))
return 1;
}
return 0;
}
static int dapm_always_on_check_power(struct snd_soc_dapm_widget *w)
{
return 1;
}
static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
struct snd_soc_dapm_widget *b,
bool power_up)
{
int *sort;
if (power_up)
sort = dapm_up_seq;
else
sort = dapm_down_seq;
if (sort[a->id] != sort[b->id])
return sort[a->id] - sort[b->id];
if (a->subseq != b->subseq) {
if (power_up)
return a->subseq - b->subseq;
else
return b->subseq - a->subseq;
}
if (a->reg != b->reg)
return a->reg - b->reg;
if (a->dapm != b->dapm)
return (unsigned long)a->dapm - (unsigned long)b->dapm;
return 0;
}
/* Insert a widget in order into a DAPM power sequence. */
static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
struct list_head *list,
bool power_up)
{
struct snd_soc_dapm_widget *w;
list_for_each_entry(w, list, power_list)
if (dapm_seq_compare(new_widget, w, power_up) < 0) {
list_add_tail(&new_widget->power_list, &w->power_list);
return;
}
list_add_tail(&new_widget->power_list, list);
}
static void dapm_seq_check_event(struct snd_soc_card *card,
struct snd_soc_dapm_widget *w, int event)
{
const char *ev_name;
int power, ret;
switch (event) {
case SND_SOC_DAPM_PRE_PMU:
ev_name = "PRE_PMU";
power = 1;
break;
case SND_SOC_DAPM_POST_PMU:
ev_name = "POST_PMU";
power = 1;
break;
case SND_SOC_DAPM_PRE_PMD:
ev_name = "PRE_PMD";
power = 0;
break;
case SND_SOC_DAPM_POST_PMD:
ev_name = "POST_PMD";
power = 0;
break;
case SND_SOC_DAPM_WILL_PMU:
ev_name = "WILL_PMU";
power = 1;
break;
case SND_SOC_DAPM_WILL_PMD:
ev_name = "WILL_PMD";
power = 0;
break;
default:
WARN(1, "Unknown event %d\n", event);
return;
}
if (w->new_power != power)
return;
if (w->event && (w->event_flags & event)) {
pop_dbg(w->dapm->dev, card->pop_time, "pop test : %s %s\n",
w->name, ev_name);
soc_dapm_async_complete(w->dapm);
trace_snd_soc_dapm_widget_event_start(w, event);
ret = w->event(w, NULL, event);
trace_snd_soc_dapm_widget_event_done(w, event);
if (ret < 0)
dev_err(w->dapm->dev, "ASoC: %s: %s event failed: %d\n",
ev_name, w->name, ret);
}
}
/* Apply the coalesced changes from a DAPM sequence */
static void dapm_seq_run_coalesced(struct snd_soc_card *card,
struct list_head *pending)
{
struct snd_soc_dapm_widget *w;
int reg;
unsigned int value = 0;
unsigned int mask = 0;
reg = list_first_entry(pending, struct snd_soc_dapm_widget,
power_list)->reg;
list_for_each_entry(w, pending, power_list) {
WARN_ON(reg != w->reg);
w->power = w->new_power;
mask |= w->mask << w->shift;
if (w->power)
value |= w->on_val << w->shift;
else
value |= w->off_val << w->shift;
pop_dbg(w->dapm->dev, card->pop_time,
"pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
w->name, reg, value, mask);
/* Check for events */
dapm_seq_check_event(card, w, SND_SOC_DAPM_PRE_PMU);
dapm_seq_check_event(card, w, SND_SOC_DAPM_PRE_PMD);
}
if (reg >= 0) {
/* Any widget will do, they should all be updating the
* same register.
*/
w = list_first_entry(pending, struct snd_soc_dapm_widget,
power_list);
pop_dbg(w->dapm->dev, card->pop_time,
"pop test : Applying 0x%x/0x%x to %x in %dms\n",
value, mask, reg, card->pop_time);
pop_wait(card->pop_time);
soc_widget_update_bits_locked(w, reg, mask, value);
}
list_for_each_entry(w, pending, power_list) {
dapm_seq_check_event(card, w, SND_SOC_DAPM_POST_PMU);
dapm_seq_check_event(card, w, SND_SOC_DAPM_POST_PMD);
}
}
/* Apply a DAPM power sequence.
*
* We walk over a pre-sorted list of widgets to apply power to. In
* order to minimise the number of writes to the device required
* multiple widgets will be updated in a single write where possible.
* Currently anything that requires more than a single write is not
* handled.
*/
static void dapm_seq_run(struct snd_soc_card *card,
struct list_head *list, int event, bool power_up)
{
struct snd_soc_dapm_widget *w, *n;
struct snd_soc_dapm_context *d;
LIST_HEAD(pending);
int cur_sort = -1;
int cur_subseq = -1;
int cur_reg = SND_SOC_NOPM;
struct snd_soc_dapm_context *cur_dapm = NULL;
int ret, i;
int *sort;
if (power_up)
sort = dapm_up_seq;
else
sort = dapm_down_seq;
list_for_each_entry_safe(w, n, list, power_list) {
ret = 0;
/* Do we need to apply any queued changes? */
if (sort[w->id] != cur_sort || w->reg != cur_reg ||
w->dapm != cur_dapm || w->subseq != cur_subseq) {
if (!list_empty(&pending))
dapm_seq_run_coalesced(card, &pending);
if (cur_dapm && cur_dapm->seq_notifier) {
for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
if (sort[i] == cur_sort)
cur_dapm->seq_notifier(cur_dapm,
i,
cur_subseq);
}
if (cur_dapm && w->dapm != cur_dapm)
soc_dapm_async_complete(cur_dapm);
INIT_LIST_HEAD(&pending);
cur_sort = -1;
cur_subseq = INT_MIN;
cur_reg = SND_SOC_NOPM;
cur_dapm = NULL;
}
switch (w->id) {
case snd_soc_dapm_pre:
if (!w->event)
list_for_each_entry_safe_continue(w, n, list,
power_list);
if (event == SND_SOC_DAPM_STREAM_START)
ret = w->event(w,
NULL, SND_SOC_DAPM_PRE_PMU);
else if (event == SND_SOC_DAPM_STREAM_STOP)
ret = w->event(w,
NULL, SND_SOC_DAPM_PRE_PMD);
break;
case snd_soc_dapm_post:
if (!w->event)
list_for_each_entry_safe_continue(w, n, list,
power_list);
if (event == SND_SOC_DAPM_STREAM_START)
ret = w->event(w,
NULL, SND_SOC_DAPM_POST_PMU);
else if (event == SND_SOC_DAPM_STREAM_STOP)
ret = w->event(w,
NULL, SND_SOC_DAPM_POST_PMD);
break;
default:
/* Queue it up for application */
cur_sort = sort[w->id];
cur_subseq = w->subseq;
cur_reg = w->reg;
cur_dapm = w->dapm;
list_move(&w->power_list, &pending);
break;
}
if (ret < 0)
dev_err(w->dapm->dev,
"ASoC: Failed to apply widget power: %d\n", ret);
}
if (!list_empty(&pending))
dapm_seq_run_coalesced(card, &pending);
if (cur_dapm && cur_dapm->seq_notifier) {
for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
if (sort[i] == cur_sort)
cur_dapm->seq_notifier(cur_dapm,
i, cur_subseq);
}
list_for_each_entry(d, &card->dapm_list, list) {
soc_dapm_async_complete(d);
}
}
static void dapm_widget_update(struct snd_soc_card *card)
{
struct snd_soc_dapm_update *update = card->update;
struct snd_soc_dapm_widget_list *wlist;
struct snd_soc_dapm_widget *w = NULL;
unsigned int wi;
int ret;
if (!update || !dapm_kcontrol_is_powered(update->kcontrol))
return;
wlist = dapm_kcontrol_get_wlist(update->kcontrol);
for (wi = 0; wi < wlist->num_widgets; wi++) {
w = wlist->widgets[wi];
if (w->event && (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
if (ret != 0)
dev_err(w->dapm->dev, "ASoC: %s DAPM pre-event failed: %d\n",
w->name, ret);
}
}
if (!w)
return;
ret = soc_widget_update_bits_locked(w, update->reg, update->mask,
update->val);
if (ret < 0)
dev_err(w->dapm->dev, "ASoC: %s DAPM update failed: %d\n",
w->name, ret);
for (wi = 0; wi < wlist->num_widgets; wi++) {
w = wlist->widgets[wi];
if (w->event && (w->event_flags & SND_SOC_DAPM_POST_REG)) {
ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
if (ret != 0)
dev_err(w->dapm->dev, "ASoC: %s DAPM post-event failed: %d\n",
w->name, ret);
}
}
}
/* Async callback run prior to DAPM sequences - brings to _PREPARE if
* they're changing state.
*/
static void dapm_pre_sequence_async(void *data, async_cookie_t cookie)
{
struct snd_soc_dapm_context *d = data;
int ret;
/* If we're off and we're not supposed to be go into STANDBY */
if (d->bias_level == SND_SOC_BIAS_OFF &&
d->target_bias_level != SND_SOC_BIAS_OFF) {
if (d->dev)
pm_runtime_get_sync(d->dev);
ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
if (ret != 0)
dev_err(d->dev,
"ASoC: Failed to turn on bias: %d\n", ret);
}
/* Prepare for a STADDBY->ON or ON->STANDBY transition */
if (d->bias_level != d->target_bias_level) {
ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);
if (ret != 0)
dev_err(d->dev,
"ASoC: Failed to prepare bias: %d\n", ret);
}
}
/* Async callback run prior to DAPM sequences - brings to their final
* state.
*/
static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
{
struct snd_soc_dapm_context *d = data;
int ret;
/* If we just powered the last thing off drop to standby bias */
if (d->bias_level == SND_SOC_BIAS_PREPARE &&
(d->target_bias_level == SND_SOC_BIAS_STANDBY ||
d->target_bias_level == SND_SOC_BIAS_OFF)) {
ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
if (ret != 0)
dev_err(d->dev, "ASoC: Failed to apply standby bias: %d\n",
ret);
}
/* If we're in standby and can support bias off then do that */
if (d->bias_level == SND_SOC_BIAS_STANDBY &&
d->target_bias_level == SND_SOC_BIAS_OFF) {
ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);
if (ret != 0)
dev_err(d->dev, "ASoC: Failed to turn off bias: %d\n",
ret);
if (d->dev)
pm_runtime_put(d->dev);
}
/* If we just powered up then move to active bias */
if (d->bias_level == SND_SOC_BIAS_PREPARE &&
d->target_bias_level == SND_SOC_BIAS_ON) {
ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);
if (ret != 0)
dev_err(d->dev, "ASoC: Failed to apply active bias: %d\n",
ret);
}
}
static void dapm_widget_set_peer_power(struct snd_soc_dapm_widget *peer,
bool power, bool connect)
{
/* If a connection is being made or broken then that update
* will have marked the peer dirty, otherwise the widgets are
* not connected and this update has no impact. */
if (!connect)
return;
/* If the peer is already in the state we're moving to then we
* won't have an impact on it. */
if (power != peer->power)
dapm_mark_dirty(peer, "peer state change");
}
static void dapm_widget_set_power(struct snd_soc_dapm_widget *w, bool power,
struct list_head *up_list,
struct list_head *down_list)
{
struct snd_soc_dapm_path *path;
if (w->power == power)
return;
trace_snd_soc_dapm_widget_power(w, power);
/* If we changed our power state perhaps our neigbours changed
* also.
*/
list_for_each_entry(path, &w->sources, list_sink) {
if (path->source) {
dapm_widget_set_peer_power(path->source, power,
path->connect);
}
}
switch (w->id) {
case snd_soc_dapm_supply:
case snd_soc_dapm_regulator_supply:
case snd_soc_dapm_clock_supply:
case snd_soc_dapm_kcontrol:
/* Supplies can't affect their outputs, only their inputs */
break;
default:
list_for_each_entry(path, &w->sinks, list_source) {
if (path->sink) {
dapm_widget_set_peer_power(path->sink, power,
path->connect);
}
}
break;
}
if (power)
dapm_seq_insert(w, up_list, true);
else
dapm_seq_insert(w, down_list, false);
}
static void dapm_power_one_widget(struct snd_soc_dapm_widget *w,
struct list_head *up_list,
struct list_head *down_list)
{
int power;
switch (w->id) {
case snd_soc_dapm_pre:
dapm_seq_insert(w, down_list, false);
break;
case snd_soc_dapm_post:
dapm_seq_insert(w, up_list, true);
break;
default:
power = dapm_widget_power_check(w);
dapm_widget_set_power(w, power, up_list, down_list);
break;
}
}
/*
* Scan each dapm widget for complete audio path.
* A complete path is a route that has valid endpoints i.e.:-
*
* o DAC to output pin.
* o Input Pin to ADC.
* o Input pin to Output pin (bypass, sidetone)
* o DAC to ADC (loopback).
*/
static int dapm_power_widgets(struct snd_soc_card *card, int event)
{
struct snd_soc_dapm_widget *w;
struct snd_soc_dapm_context *d;
LIST_HEAD(up_list);
LIST_HEAD(down_list);
ASYNC_DOMAIN_EXCLUSIVE(async_domain);
enum snd_soc_bias_level bias;
trace_snd_soc_dapm_start(card);
list_for_each_entry(d, &card->dapm_list, list) {
if (d->idle_bias_off)
d->target_bias_level = SND_SOC_BIAS_OFF;
else
d->target_bias_level = SND_SOC_BIAS_STANDBY;
}
dapm_reset(card);
/* Check which widgets we need to power and store them in
* lists indicating if they should be powered up or down. We
* only check widgets that have been flagged as dirty but note
* that new widgets may be added to the dirty list while we
* iterate.
*/
list_for_each_entry(w, &card->dapm_dirty, dirty) {
dapm_power_one_widget(w, &up_list, &down_list);
}
list_for_each_entry(w, &card->widgets, list) {
switch (w->id) {
case snd_soc_dapm_pre:
case snd_soc_dapm_post:
/* These widgets always need to be powered */
break;
default:
list_del_init(&w->dirty);
break;
}
if (w->new_power) {
d = w->dapm;
/* Supplies and micbiases only bring the
* context up to STANDBY as unless something
* else is active and passing audio they
* generally don't require full power. Signal
* generators are virtual pins and have no
* power impact themselves.
*/
switch (w->id) {
case snd_soc_dapm_siggen:
case snd_soc_dapm_vmid:
break;
case snd_soc_dapm_supply:
case snd_soc_dapm_regulator_supply:
case snd_soc_dapm_clock_supply:
case snd_soc_dapm_micbias:
if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
d->target_bias_level = SND_SOC_BIAS_STANDBY;
break;
default:
d->target_bias_level = SND_SOC_BIAS_ON;
break;
}
}
}
/* Force all contexts in the card to the same bias state if
* they're not ground referenced.
*/
bias = SND_SOC_BIAS_OFF;
list_for_each_entry(d, &card->dapm_list, list)
if (d->target_bias_level > bias)
bias = d->target_bias_level;
list_for_each_entry(d, &card->dapm_list, list)
if (!d->idle_bias_off)
d->target_bias_level = bias;
trace_snd_soc_dapm_walk_done(card);
/* Run all the bias changes in parallel */
list_for_each_entry(d, &card->dapm_list, list)
async_schedule_domain(dapm_pre_sequence_async, d,
&async_domain);
async_synchronize_full_domain(&async_domain);
list_for_each_entry(w, &down_list, power_list) {
dapm_seq_check_event(card, w, SND_SOC_DAPM_WILL_PMD);
}
list_for_each_entry(w, &up_list, power_list) {
dapm_seq_check_event(card, w, SND_SOC_DAPM_WILL_PMU);
}
/* Power down widgets first; try to avoid amplifying pops. */
dapm_seq_run(card, &down_list, event, false);
dapm_widget_update(card);
/* Now power up. */
dapm_seq_run(card, &up_list, event, true);
/* Run all the bias changes in parallel */
list_for_each_entry(d, &card->dapm_list, list)
async_schedule_domain(dapm_post_sequence_async, d,
&async_domain);
async_synchronize_full_domain(&async_domain);
/* do we need to notify any clients that DAPM event is complete */
list_for_each_entry(d, &card->dapm_list, list) {
if (d->stream_event)
d->stream_event(d, event);
}
pop_dbg(card->dev, card->pop_time,
"DAPM sequencing finished, waiting %dms\n", card->pop_time);
pop_wait(card->pop_time);
trace_snd_soc_dapm_done(card);
return 0;
}
#ifdef CONFIG_DEBUG_FS
static ssize_t dapm_widget_power_read_file(struct file *file,
char __user *user_buf,
size_t count, loff_t *ppos)
{
struct snd_soc_dapm_widget *w = file->private_data;
char *buf;
int in, out;
ssize_t ret;
struct snd_soc_dapm_path *p = NULL;
buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
if (!buf)
return -ENOMEM;
in = is_connected_input_ep(w, NULL);
dapm_clear_walk_input(w->dapm, &w->sources);
out = is_connected_output_ep(w, NULL);
dapm_clear_walk_output(w->dapm, &w->sinks);
ret = snprintf(buf, PAGE_SIZE, "%s: %s%s in %d out %d",
w->name, w->power ? "On" : "Off",
w->force ? " (forced)" : "", in, out);
if (w->reg >= 0)
ret += snprintf(buf + ret, PAGE_SIZE - ret,
" - R%d(0x%x) mask 0x%x",
w->reg, w->reg, w->mask << w->shift);
ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
if (w->sname)
ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
w->sname,
w->active ? "active" : "inactive");
list_for_each_entry(p, &w->sources, list_sink) {
if (p->connected && !p->connected(w, p->source))
continue;
if (p->connect)
ret += snprintf(buf + ret, PAGE_SIZE - ret,
" in \"%s\" \"%s\"\n",
p->name ? p->name : "static",
p->source->name);
}
list_for_each_entry(p, &w->sinks, list_source) {
if (p->connected && !p->connected(w, p->sink))
continue;
if (p->connect)
ret += snprintf(buf + ret, PAGE_SIZE - ret,
" out \"%s\" \"%s\"\n",
p->name ? p->name : "static",
p->sink->name);
}
ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
kfree(buf);
return ret;
}
static const struct file_operations dapm_widget_power_fops = {
.open = simple_open,
.read = dapm_widget_power_read_file,
.llseek = default_llseek,
};
static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
{
struct snd_soc_dapm_context *dapm = file->private_data;
char *level;
switch (dapm->bias_level) {
case SND_SOC_BIAS_ON:
level = "On\n";
break;
case SND_SOC_BIAS_PREPARE:
level = "Prepare\n";
break;
case SND_SOC_BIAS_STANDBY:
level = "Standby\n";
break;
case SND_SOC_BIAS_OFF:
level = "Off\n";
break;
default:
WARN(1, "Unknown bias_level %d\n", dapm->bias_level);
level = "Unknown\n";
break;
}
return simple_read_from_buffer(user_buf, count, ppos, level,
strlen(level));
}
static const struct file_operations dapm_bias_fops = {
.open = simple_open,
.read = dapm_bias_read_file,
.llseek = default_llseek,
};
void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
struct dentry *parent)
{
struct dentry *d;
dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
if (!dapm->debugfs_dapm) {
dev_warn(dapm->dev,
"ASoC: Failed to create DAPM debugfs directory\n");
return;
}
d = debugfs_create_file("bias_level", 0444,
dapm->debugfs_dapm, dapm,
&dapm_bias_fops);
if (!d)
dev_warn(dapm->dev,
"ASoC: Failed to create bias level debugfs file\n");
}
static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
{
struct snd_soc_dapm_context *dapm = w->dapm;
struct dentry *d;
if (!dapm->debugfs_dapm || !w->name)
return;
d = debugfs_create_file(w->name, 0444,
dapm->debugfs_dapm, w,
&dapm_widget_power_fops);
if (!d)
dev_warn(w->dapm->dev,
"ASoC: Failed to create %s debugfs file\n",
w->name);
}
static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
{
debugfs_remove_recursive(dapm->debugfs_dapm);
}
#else
void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
struct dentry *parent)
{
}
static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
{
}
static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
{
}
#endif
/* test and update the power status of a mux widget */
static int soc_dapm_mux_update_power(struct snd_soc_card *card,
struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e)
{
struct snd_soc_dapm_path *path;
int found = 0;
/* find dapm widget path assoc with kcontrol */
dapm_kcontrol_for_each_path(path, kcontrol) {
if (!path->name || !e->texts[mux])
continue;
found = 1;
/* we now need to match the string in the enum to the path */
if (!(strcmp(path->name, e->texts[mux]))) {
path->connect = 1; /* new connection */
dapm_mark_dirty(path->source, "mux connection");
} else {
if (path->connect)
dapm_mark_dirty(path->source,
"mux disconnection");
path->connect = 0; /* old connection must be powered down */
}
dapm_mark_dirty(path->sink, "mux change");
}
if (found)
dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
return found;
}
int snd_soc_dapm_mux_update_power(struct snd_soc_dapm_context *dapm,
struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e,
struct snd_soc_dapm_update *update)
{
struct snd_soc_card *card = dapm->card;
int ret;
mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
card->update = update;
ret = soc_dapm_mux_update_power(card, kcontrol, mux, e);
card->update = NULL;
mutex_unlock(&card->dapm_mutex);
if (ret > 0)
soc_dpcm_runtime_update(card);
return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_mux_update_power);
/* test and update the power status of a mixer or switch widget */
static int soc_dapm_mixer_update_power(struct snd_soc_card *card,
struct snd_kcontrol *kcontrol, int connect)
{
struct snd_soc_dapm_path *path;
int found = 0;
/* find dapm widget path assoc with kcontrol */
dapm_kcontrol_for_each_path(path, kcontrol) {
found = 1;
path->connect = connect;
dapm_mark_dirty(path->source, "mixer connection");
dapm_mark_dirty(path->sink, "mixer update");
}
if (found)
dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
return found;
}
int snd_soc_dapm_mixer_update_power(struct snd_soc_dapm_context *dapm,
struct snd_kcontrol *kcontrol, int connect,
struct snd_soc_dapm_update *update)
{
struct snd_soc_card *card = dapm->card;
int ret;
mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
card->update = update;
ret = soc_dapm_mixer_update_power(card, kcontrol, connect);
card->update = NULL;
mutex_unlock(&card->dapm_mutex);
if (ret > 0)
soc_dpcm_runtime_update(card);
return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_mixer_update_power);
/* show dapm widget status in sys fs */
static ssize_t dapm_widget_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
struct snd_soc_codec *codec =rtd->codec;
struct snd_soc_dapm_widget *w;
int count = 0;
char *state = "not set";
list_for_each_entry(w, &codec->card->widgets, list) {
if (w->dapm != &codec->dapm)
continue;
/* only display widgets that burnm power */
switch (w->id) {
case snd_soc_dapm_hp:
case snd_soc_dapm_mic:
case snd_soc_dapm_spk:
case snd_soc_dapm_line:
case snd_soc_dapm_micbias:
case snd_soc_dapm_dac:
case snd_soc_dapm_adc:
case snd_soc_dapm_pga:
case snd_soc_dapm_out_drv:
case snd_soc_dapm_mixer:
case snd_soc_dapm_mixer_named_ctl:
case snd_soc_dapm_supply:
case snd_soc_dapm_regulator_supply:
case snd_soc_dapm_clock_supply:
if (w->name)
count += sprintf(buf + count, "%s: %s\n",
w->name, w->power ? "On":"Off");
break;
default:
break;
}
}
switch (codec->dapm.bias_level) {
case SND_SOC_BIAS_ON:
state = "On";
break;
case SND_SOC_BIAS_PREPARE:
state = "Prepare";
break;
case SND_SOC_BIAS_STANDBY:
state = "Standby";
break;
case SND_SOC_BIAS_OFF:
state = "Off";
break;
}
count += sprintf(buf + count, "PM State: %s\n", state);
return count;
}
static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
int snd_soc_dapm_sys_add(struct device *dev)
{
return device_create_file(dev, &dev_attr_dapm_widget);
}
static void snd_soc_dapm_sys_remove(struct device *dev)
{
device_remove_file(dev, &dev_attr_dapm_widget);
}
static void dapm_free_path(struct snd_soc_dapm_path *path)
{
list_del(&path->list_sink);
list_del(&path->list_source);
list_del(&path->list_kcontrol);
list_del(&path->list);
kfree(path);
}
/* free all dapm widgets and resources */
static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
{
struct snd_soc_dapm_widget *w, *next_w;
struct snd_soc_dapm_path *p, *next_p;
list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
if (w->dapm != dapm)
continue;
list_del(&w->list);
/*
* remove source and sink paths associated to this widget.
* While removing the path, remove reference to it from both
* source and sink widgets so that path is removed only once.
*/
list_for_each_entry_safe(p, next_p, &w->sources, list_sink)
dapm_free_path(p);
list_for_each_entry_safe(p, next_p, &w->sinks, list_source)
dapm_free_path(p);
kfree(w->kcontrols);
kfree(w->name);
kfree(w);
}
}
static struct snd_soc_dapm_widget *dapm_find_widget(
struct snd_soc_dapm_context *dapm, const char *pin,
bool search_other_contexts)
{
struct snd_soc_dapm_widget *w;
struct snd_soc_dapm_widget *fallback = NULL;
list_for_each_entry(w, &dapm->card->widgets, list) {
if (!strcmp(w->name, pin)) {
if (w->dapm == dapm)
return w;
else
fallback = w;
}
}
if (search_other_contexts)
return fallback;
return NULL;
}
static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
const char *pin, int status)
{
struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
if (!w) {
dev_err(dapm->dev, "ASoC: DAPM unknown pin %s\n", pin);
return -EINVAL;
}
if (w->connected != status)
dapm_mark_dirty(w, "pin configuration");
w->connected = status;
if (status == 0)
w->force = 0;
return 0;
}
/**
* snd_soc_dapm_sync - scan and power dapm paths
* @dapm: DAPM context
*
* Walks all dapm audio paths and powers widgets according to their
* stream or path usage.
*
* Returns 0 for success.
*/
int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
{
int ret;
/*
* Suppress early reports (eg, jacks syncing their state) to avoid
* silly DAPM runs during card startup.
*/
if (!dapm->card || !dapm->card->instantiated)
return 0;
mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
ret = dapm_power_widgets(dapm->card, SND_SOC_DAPM_STREAM_NOP);
mutex_unlock(&dapm->card->dapm_mutex);
return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
static int snd_soc_dapm_add_path(struct snd_soc_dapm_context *dapm,
struct snd_soc_dapm_widget *wsource, struct snd_soc_dapm_widget *wsink,
const char *control,
int (*connected)(struct snd_soc_dapm_widget *source,
struct snd_soc_dapm_widget *sink))
{
struct snd_soc_dapm_path *path;
int ret;
path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
if (!path)
return -ENOMEM;
path->source = wsource;
path->sink = wsink;
path->connected = connected;
INIT_LIST_HEAD(&path->list);
INIT_LIST_HEAD(&path->list_kcontrol);
INIT_LIST_HEAD(&path->list_source);
INIT_LIST_HEAD(&path->list_sink);
/* check for external widgets */
if (wsink->id == snd_soc_dapm_input) {
if (wsource->id == snd_soc_dapm_micbias ||
wsource->id == snd_soc_dapm_mic ||
wsource->id == snd_soc_dapm_line ||
wsource->id == snd_soc_dapm_output)
wsink->ext = 1;
}
if (wsource->id == snd_soc_dapm_output) {
if (wsink->id == snd_soc_dapm_spk ||
wsink->id == snd_soc_dapm_hp ||
wsink->id == snd_soc_dapm_line ||
wsink->id == snd_soc_dapm_input)
wsource->ext = 1;
}
dapm_mark_dirty(wsource, "Route added");
dapm_mark_dirty(wsink, "Route added");
/* connect static paths */
if (control == NULL) {
list_add(&path->list, &dapm->card->paths);
list_add(&path->list_sink, &wsink->sources);
list_add(&path->list_source, &wsource->sinks);
path->connect = 1;
return 0;
}
/* connect dynamic paths */
switch (wsink->id) {
case snd_soc_dapm_adc:
case snd_soc_dapm_dac:
case snd_soc_dapm_pga:
case snd_soc_dapm_out_drv:
case snd_soc_dapm_input:
case snd_soc_dapm_output:
case snd_soc_dapm_siggen:
case snd_soc_dapm_micbias:
case snd_soc_dapm_vmid:
case snd_soc_dapm_pre:
case snd_soc_dapm_post:
case snd_soc_dapm_supply:
case snd_soc_dapm_regulator_supply:
case snd_soc_dapm_clock_supply:
case snd_soc_dapm_aif_in:
case snd_soc_dapm_aif_out:
case snd_soc_dapm_dai_in:
case snd_soc_dapm_dai_out:
case snd_soc_dapm_dai_link:
case snd_soc_dapm_kcontrol:
list_add(&path->list, &dapm->card->paths);
list_add(&path->list_sink, &wsink->sources);
list_add(&path->list_source, &wsource->sinks);
path->connect = 1;
return 0;
case snd_soc_dapm_mux:
case snd_soc_dapm_virt_mux:
case snd_soc_dapm_value_mux:
ret = dapm_connect_mux(dapm, wsource, wsink, path, control,
&wsink->kcontrol_news[0]);
if (ret != 0)
goto err;
break;
case snd_soc_dapm_switch:
case snd_soc_dapm_mixer:
case snd_soc_dapm_mixer_named_ctl:
ret = dapm_connect_mixer(dapm, wsource, wsink, path, control);
if (ret != 0)
goto err;
break;
case snd_soc_dapm_hp:
case snd_soc_dapm_mic:
case snd_soc_dapm_line:
case snd_soc_dapm_spk:
list_add(&path->list, &dapm->card->paths);
list_add(&path->list_sink, &wsink->sources);
list_add(&path->list_source, &wsource->sinks);
path->connect = 0;
return 0;
}
return 0;
err:
kfree(path);
return ret;
}
static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
const struct snd_soc_dapm_route *route,
unsigned int is_prefixed)
{
struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
const char *sink;
const char *source;
char prefixed_sink[80];
char prefixed_source[80];
int ret;
if (dapm->codec && dapm->codec->name_prefix && !is_prefixed) {
snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
dapm->codec->name_prefix, route->sink);
sink = prefixed_sink;
snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
dapm->codec->name_prefix, route->source);
source = prefixed_source;
} else {
sink = route->sink;
source = route->source;
}
/*
* find src and dest widgets over all widgets but favor a widget from
* current DAPM context
*/
list_for_each_entry(w, &dapm->card->widgets, list) {
if (!wsink && !(strcmp(w->name, sink))) {
wtsink = w;
if (w->dapm == dapm)
wsink = w;
continue;
}
if (!wsource && !(strcmp(w->name, source))) {
wtsource = w;
if (w->dapm == dapm)
wsource = w;
}
}
/* use widget from another DAPM context if not found from this */
if (!wsink)
wsink = wtsink;
if (!wsource)
wsource = wtsource;
if (wsource == NULL) {
dev_err(dapm->dev, "ASoC: no source widget found for %s\n",
route->source);
return -ENODEV;
}
if (wsink == NULL) {
dev_err(dapm->dev, "ASoC: no sink widget found for %s\n",
route->sink);
return -ENODEV;
}
ret = snd_soc_dapm_add_path(dapm, wsource, wsink, route->control,
route->connected);
if (ret)
goto err;
return 0;
err:
dev_warn(dapm->dev, "ASoC: no dapm match for %s --> %s --> %s\n",
source, route->control, sink);
return ret;
}
static int snd_soc_dapm_del_route(struct snd_soc_dapm_context *dapm,
const struct snd_soc_dapm_route *route)
{
struct snd_soc_dapm_path *path, *p;
const char *sink;
const char *source;
char prefixed_sink[80];
char prefixed_source[80];
if (route->control) {
dev_err(dapm->dev,
"ASoC: Removal of routes with controls not supported\n");
return -EINVAL;
}
if (dapm->codec && dapm->codec->name_prefix) {
snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
dapm->codec->name_prefix, route->sink);
sink = prefixed_sink;
snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
dapm->codec->name_prefix, route->source);
source = prefixed_source;
} else {
sink = route->sink;
source = route->source;
}
path = NULL;
list_for_each_entry(p, &dapm->card->paths, list) {
if (strcmp(p->source->name, source) != 0)
continue;
if (strcmp(p->sink->name, sink) != 0)
continue;
path = p;
break;
}
if (path) {
dapm_mark_dirty(path->source, "Route removed");
dapm_mark_dirty(path->sink, "Route removed");
dapm_free_path(path);
} else {
dev_warn(dapm->dev, "ASoC: Route %s->%s does not exist\n",
source, sink);
}
return 0;
}
/**
* snd_soc_dapm_add_routes - Add routes between DAPM widgets
* @dapm: DAPM context
* @route: audio routes
* @num: number of routes
*
* Connects 2 dapm widgets together via a named audio path. The sink is
* the widget receiving the audio signal, whilst the source is the sender
* of the audio signal.
*
* Returns 0 for success else error. On error all resources can be freed
* with a call to snd_soc_card_free().
*/
int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
const struct snd_soc_dapm_route *route, int num)
{
int i, r, ret = 0;
mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
for (i = 0; i < num; i++) {
r = snd_soc_dapm_add_route(dapm, route, false);
if (r < 0) {
dev_err(dapm->dev, "ASoC: Failed to add route %s -> %s -> %s\n",
route->source,
route->control ? route->control : "direct",
route->sink);
ret = r;
}
route++;
}
mutex_unlock(&dapm->card->dapm_mutex);
return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
/**
* snd_soc_dapm_del_routes - Remove routes between DAPM widgets
* @dapm: DAPM context
* @route: audio routes
* @num: number of routes
*
* Removes routes from the DAPM context.
*/
int snd_soc_dapm_del_routes(struct snd_soc_dapm_context *dapm,
const struct snd_soc_dapm_route *route, int num)
{
int i, ret = 0;
mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
for (i = 0; i < num; i++) {
snd_soc_dapm_del_route(dapm, route);
route++;
}
mutex_unlock(&dapm->card->dapm_mutex);
return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_del_routes);
static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm,
const struct snd_soc_dapm_route *route)
{
struct snd_soc_dapm_widget *source = dapm_find_widget(dapm,
route->source,
true);
struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm,
route->sink,
true);
struct snd_soc_dapm_path *path;
int count = 0;
if (!source) {
dev_err(dapm->dev, "ASoC: Unable to find source %s for weak route\n",
route->source);
return -ENODEV;
}
if (!sink) {
dev_err(dapm->dev, "ASoC: Unable to find sink %s for weak route\n",
route->sink);
return -ENODEV;
}
if (route->control || route->connected)
dev_warn(dapm->dev, "ASoC: Ignoring control for weak route %s->%s\n",
route->source, route->sink);
list_for_each_entry(path, &source->sinks, list_source) {
if (path->sink == sink) {
path->weak = 1;
count++;
}
}
if (count == 0)
dev_err(dapm->dev, "ASoC: No path found for weak route %s->%s\n",
route->source, route->sink);
if (count > 1)
dev_warn(dapm->dev, "ASoC: %d paths found for weak route %s->%s\n",
count, route->source, route->sink);
return 0;
}
/**
* snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
* @dapm: DAPM context
* @route: audio routes
* @num: number of routes
*
* Mark existing routes matching those specified in the passed array
* as being weak, meaning that they are ignored for the purpose of
* power decisions. The main intended use case is for sidetone paths
* which couple audio between other independent paths if they are both
* active in order to make the combination work better at the user
* level but which aren't intended to be "used".
*
* Note that CODEC drivers should not use this as sidetone type paths
* can frequently also be used as bypass paths.
*/
int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm,
const struct snd_soc_dapm_route *route, int num)
{
int i, err;
int ret = 0;
mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
for (i = 0; i < num; i++) {
err = snd_soc_dapm_weak_route(dapm, route);
if (err)
ret = err;
route++;
}
mutex_unlock(&dapm->card->dapm_mutex);
return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes);
/**
* snd_soc_dapm_new_widgets - add new dapm widgets
* @dapm: DAPM context
*
* Checks the codec for any new dapm widgets and creates them if found.
*
* Returns 0 for success.
*/
int snd_soc_dapm_new_widgets(struct snd_soc_card *card)
{
struct snd_soc_dapm_widget *w;
unsigned int val;
mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
list_for_each_entry(w, &card->widgets, list)
{