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// SPDX-License-Identifier: GPL-2.0+
//
// soc-dapm.c -- ALSA SoC Dynamic Audio Power Management
//
// Copyright 2005 Wolfson Microelectronics PLC.
// Author: Liam Girdwood <lrg@slimlogic.co.uk>
//
// 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/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/pinctrl/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++;
#define SND_SOC_DAPM_DIR_REVERSE(x) ((x == SND_SOC_DAPM_DIR_IN) ? \
SND_SOC_DAPM_DIR_OUT : SND_SOC_DAPM_DIR_IN)
#define snd_soc_dapm_for_each_direction(dir) \
for ((dir) = SND_SOC_DAPM_DIR_IN; (dir) <= SND_SOC_DAPM_DIR_OUT; \
(dir)++)
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_widget *
snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
const struct snd_soc_dapm_widget *widget);
struct snd_soc_dapm_widget *
snd_soc_dapm_new_control_unlocked(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] = 1,
[snd_soc_dapm_regulator_supply] = 2,
[snd_soc_dapm_pinctrl] = 2,
[snd_soc_dapm_clock_supply] = 2,
[snd_soc_dapm_supply] = 3,
[snd_soc_dapm_micbias] = 4,
[snd_soc_dapm_vmid] = 4,
[snd_soc_dapm_dai_link] = 3,
[snd_soc_dapm_dai_in] = 5,
[snd_soc_dapm_dai_out] = 5,
[snd_soc_dapm_aif_in] = 5,
[snd_soc_dapm_aif_out] = 5,
[snd_soc_dapm_mic] = 6,
[snd_soc_dapm_siggen] = 6,
[snd_soc_dapm_input] = 6,
[snd_soc_dapm_output] = 6,
[snd_soc_dapm_mux] = 7,
[snd_soc_dapm_demux] = 7,
[snd_soc_dapm_dac] = 8,
[snd_soc_dapm_switch] = 9,
[snd_soc_dapm_mixer] = 9,
[snd_soc_dapm_mixer_named_ctl] = 9,
[snd_soc_dapm_pga] = 10,
[snd_soc_dapm_buffer] = 10,
[snd_soc_dapm_scheduler] = 10,
[snd_soc_dapm_effect] = 10,
[snd_soc_dapm_src] = 10,
[snd_soc_dapm_asrc] = 10,
[snd_soc_dapm_encoder] = 10,
[snd_soc_dapm_decoder] = 10,
[snd_soc_dapm_adc] = 11,
[snd_soc_dapm_out_drv] = 12,
[snd_soc_dapm_hp] = 12,
[snd_soc_dapm_spk] = 12,
[snd_soc_dapm_line] = 12,
[snd_soc_dapm_sink] = 12,
[snd_soc_dapm_kcontrol] = 13,
[snd_soc_dapm_post] = 14,
};
static int dapm_down_seq[] = {
[snd_soc_dapm_pre] = 1,
[snd_soc_dapm_kcontrol] = 2,
[snd_soc_dapm_adc] = 3,
[snd_soc_dapm_hp] = 4,
[snd_soc_dapm_spk] = 4,
[snd_soc_dapm_line] = 4,
[snd_soc_dapm_out_drv] = 4,
[snd_soc_dapm_sink] = 4,
[snd_soc_dapm_pga] = 5,
[snd_soc_dapm_buffer] = 5,
[snd_soc_dapm_scheduler] = 5,
[snd_soc_dapm_effect] = 5,
[snd_soc_dapm_src] = 5,
[snd_soc_dapm_asrc] = 5,
[snd_soc_dapm_encoder] = 5,
[snd_soc_dapm_decoder] = 5,
[snd_soc_dapm_switch] = 6,
[snd_soc_dapm_mixer_named_ctl] = 6,
[snd_soc_dapm_mixer] = 6,
[snd_soc_dapm_dac] = 7,
[snd_soc_dapm_mic] = 8,
[snd_soc_dapm_siggen] = 8,
[snd_soc_dapm_input] = 8,
[snd_soc_dapm_output] = 8,
[snd_soc_dapm_micbias] = 9,
[snd_soc_dapm_vmid] = 9,
[snd_soc_dapm_mux] = 10,
[snd_soc_dapm_demux] = 10,
[snd_soc_dapm_aif_in] = 11,
[snd_soc_dapm_aif_out] = 11,
[snd_soc_dapm_dai_in] = 11,
[snd_soc_dapm_dai_out] = 11,
[snd_soc_dapm_dai_link] = 12,
[snd_soc_dapm_supply] = 13,
[snd_soc_dapm_clock_supply] = 14,
[snd_soc_dapm_pinctrl] = 14,
[snd_soc_dapm_regulator_supply] = 14,
[snd_soc_dapm_post] = 15,
};
static void dapm_assert_locked(struct snd_soc_dapm_context *dapm)
{
if (dapm->card && dapm->card->instantiated)
lockdep_assert_held(&dapm->card->dapm_mutex);
}
static void pop_wait(u32 pop_time)
{
if (pop_time)
schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
}
__printf(3, 4)
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);
}
static void dapm_mark_dirty(struct snd_soc_dapm_widget *w, const char *reason)
{
dapm_assert_locked(w->dapm);
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);
}
}
/*
* Common implementation for dapm_widget_invalidate_input_paths() and
* dapm_widget_invalidate_output_paths(). The function is inlined since the
* combined size of the two specialized functions is only marginally larger then
* the size of the generic function and at the same time the fast path of the
* specialized functions is significantly smaller than the generic function.
*/
static __always_inline void dapm_widget_invalidate_paths(
struct snd_soc_dapm_widget *w, enum snd_soc_dapm_direction dir)
{
enum snd_soc_dapm_direction rdir = SND_SOC_DAPM_DIR_REVERSE(dir);
struct snd_soc_dapm_widget *node;
struct snd_soc_dapm_path *p;
LIST_HEAD(list);
dapm_assert_locked(w->dapm);
if (w->endpoints[dir] == -1)
return;
list_add_tail(&w->work_list, &list);
w->endpoints[dir] = -1;
list_for_each_entry(w, &list, work_list) {
snd_soc_dapm_widget_for_each_path(w, dir, p) {
if (p->is_supply || p->weak || !p->connect)
continue;
node = p->node[rdir];
if (node->endpoints[dir] != -1) {
node->endpoints[dir] = -1;
list_add_tail(&node->work_list, &list);
}
}
}
}
/*
* dapm_widget_invalidate_input_paths() - Invalidate the cached number of
* input paths
* @w: The widget for which to invalidate the cached number of input paths
*
* Resets the cached number of inputs for the specified widget and all widgets
* that can be reached via outcoming paths from the widget.
*
* This function must be called if the number of output paths for a widget might
* have changed. E.g. if the source state of a widget changes or a path is added
* or activated with the widget as the sink.
*/
static void dapm_widget_invalidate_input_paths(struct snd_soc_dapm_widget *w)
{
dapm_widget_invalidate_paths(w, SND_SOC_DAPM_DIR_IN);
}
/*
* dapm_widget_invalidate_output_paths() - Invalidate the cached number of
* output paths
* @w: The widget for which to invalidate the cached number of output paths
*
* Resets the cached number of outputs for the specified widget and all widgets
* that can be reached via incoming paths from the widget.
*
* This function must be called if the number of output paths for a widget might
* have changed. E.g. if the sink state of a widget changes or a path is added
* or activated with the widget as the source.
*/
static void dapm_widget_invalidate_output_paths(struct snd_soc_dapm_widget *w)
{
dapm_widget_invalidate_paths(w, SND_SOC_DAPM_DIR_OUT);
}
/*
* dapm_path_invalidate() - Invalidates the cached number of inputs and outputs
* for the widgets connected to a path
* @p: The path to invalidate
*
* Resets the cached number of inputs for the sink of the path and the cached
* number of outputs for the source of the path.
*
* This function must be called when a path is added, removed or the connected
* state changes.
*/
static void dapm_path_invalidate(struct snd_soc_dapm_path *p)
{
/*
* Weak paths or supply paths do not influence the number of input or
* output paths of their neighbors.
*/
if (p->weak || p->is_supply)
return;
/*
* The number of connected endpoints is the sum of the number of
* connected endpoints of all neighbors. If a node with 0 connected
* endpoints is either connected or disconnected that sum won't change,
* so there is no need to re-check the path.
*/
if (p->source->endpoints[SND_SOC_DAPM_DIR_IN] != 0)
dapm_widget_invalidate_input_paths(p->sink);
if (p->sink->endpoints[SND_SOC_DAPM_DIR_OUT] != 0)
dapm_widget_invalidate_output_paths(p->source);
}
void dapm_mark_endpoints_dirty(struct snd_soc_card *card)
{
struct snd_soc_dapm_widget *w;
mutex_lock(&card->dapm_mutex);
list_for_each_entry(w, &card->widgets, list) {
if (w->is_ep) {
dapm_mark_dirty(w, "Rechecking endpoints");
if (w->is_ep & SND_SOC_DAPM_EP_SINK)
dapm_widget_invalidate_output_paths(w);
if (w->is_ep & SND_SOC_DAPM_EP_SOURCE)
dapm_widget_invalidate_input_paths(w);
}
}
mutex_unlock(&card->dapm_mutex);
}
EXPORT_SYMBOL_GPL(dapm_mark_endpoints_dirty);
/* create a new dapm widget */
static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
const struct snd_soc_dapm_widget *_widget)
{
struct snd_soc_dapm_widget *w;
w = kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
if (!w)
return NULL;
/*
* w->name is duplicated in caller, but w->sname isn't.
* Duplicate it here if defined
*/
if (_widget->sname) {
w->sname = kstrdup_const(_widget->sname, GFP_KERNEL);
if (!w->sname) {
kfree(w);
return NULL;
}
}
return w;
}
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, const char *ctrl_name)
{
struct dapm_kcontrol_data *data;
struct soc_mixer_control *mc;
struct soc_enum *e;
const char *name;
int ret;
data = kzalloc(sizeof(*data), GFP_KERNEL);
if (!data)
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 && snd_soc_volsw_is_stereo(mc))
dev_warn(widget->dapm->dev,
"ASoC: Unsupported stereo autodisable control '%s'\n",
ctrl_name);
if (mc->autodisable) {
struct snd_soc_dapm_widget template;
name = kasprintf(GFP_KERNEL, "%s %s", ctrl_name,
"Autodisable");
if (!name) {
ret = -ENOMEM;
goto err_data;
}
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 = name;
data->value = template.on_val;
data->widget =
snd_soc_dapm_new_control_unlocked(widget->dapm,
&template);
kfree(name);
if (IS_ERR(data->widget)) {
ret = PTR_ERR(data->widget);
goto err_data;
}
}
break;
case snd_soc_dapm_demux:
case snd_soc_dapm_mux:
e = (struct soc_enum *)kcontrol->private_value;
if (e->autodisable) {
struct snd_soc_dapm_widget template;
name = kasprintf(GFP_KERNEL, "%s %s", ctrl_name,
"Autodisable");
if (!name) {
ret = -ENOMEM;
goto err_data;
}
memset(&template, 0, sizeof(template));
template.reg = e->reg;
template.mask = e->mask << e->shift_l;
template.shift = e->shift_l;
template.off_val = snd_soc_enum_item_to_val(e, 0);
template.on_val = template.off_val;
template.id = snd_soc_dapm_kcontrol;
template.name = name;
data->value = template.on_val;
data->widget = snd_soc_dapm_new_control_unlocked(
widget->dapm, &template);
kfree(name);
if (IS_ERR(data->widget)) {
ret = PTR_ERR(data->widget);
goto err_data;
}
snd_soc_dapm_add_path(widget->dapm, data->widget,
widget, NULL, NULL);
}
break;
default:
break;
}
kcontrol->private_data = data;
return 0;
err_data:
kfree(data);
return ret;
}
static void dapm_kcontrol_free(struct snd_kcontrol *kctl)
{
struct dapm_kcontrol_data *data = snd_kcontrol_chip(kctl);
list_del(&data->paths);
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);
}
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)
unsigned int dapm_kcontrol_get_value(const struct snd_kcontrol *kcontrol)
{
struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
return data->value;
}
EXPORT_SYMBOL_GPL(dapm_kcontrol_get_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_widget() - Returns the widget associated to a
* kcontrol
* @kcontrol: The kcontrol
*/
struct snd_soc_dapm_widget *snd_soc_dapm_kcontrol_widget(
struct snd_kcontrol *kcontrol)
{
return dapm_kcontrol_get_wlist(kcontrol)->widgets[0];
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_kcontrol_widget);
/**
* snd_soc_dapm_kcontrol_dapm() - Returns the dapm context associated to a
* kcontrol
* @kcontrol: The kcontrol
*
* Note: This function must only be used on kcontrols that are known to have
* been registered for a CODEC. Otherwise the behaviour is undefined.
*/
struct snd_soc_dapm_context *snd_soc_dapm_kcontrol_dapm(
struct snd_kcontrol *kcontrol)
{
return dapm_kcontrol_get_wlist(kcontrol)->widgets[0]->dapm;
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_kcontrol_dapm);
static void dapm_reset(struct snd_soc_card *card)
{
struct snd_soc_dapm_widget *w;
lockdep_assert_held(&card->dapm_mutex);
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;
}
}
static const char *soc_dapm_prefix(struct snd_soc_dapm_context *dapm)
{
if (!dapm->component)
return NULL;
return dapm->component->name_prefix;
}
static int soc_dapm_read(struct snd_soc_dapm_context *dapm, int reg,
unsigned int *value)
{
if (!dapm->component)
return -EIO;
return snd_soc_component_read(dapm->component, reg, value);
}
static int soc_dapm_update_bits(struct snd_soc_dapm_context *dapm,
int reg, unsigned int mask, unsigned int value)
{
if (!dapm->component)
return -EIO;
return snd_soc_component_update_bits(dapm->component, reg,
mask, value);
}
static int soc_dapm_test_bits(struct snd_soc_dapm_context *dapm,
int reg, unsigned int mask, unsigned int value)
{
if (!dapm->component)
return -EIO;
return snd_soc_component_test_bits(dapm->component, reg, mask, value);
}
static void soc_dapm_async_complete(struct snd_soc_dapm_context *dapm)
{
if (dapm->component)
snd_soc_component_async_complete(dapm->component);
}
static struct snd_soc_dapm_widget *
dapm_wcache_lookup(struct snd_soc_dapm_wcache *wcache, const char *name)
{
struct snd_soc_dapm_widget *w = wcache->widget;
struct list_head *wlist;
const int depth = 2;
int i = 0;
if (w) {
wlist = &w->dapm->card->widgets;
list_for_each_entry_from(w, wlist, list) {
if (!strcmp(name, w->name))
return w;
if (++i == depth)
break;
}
}
return NULL;
}
static inline void dapm_wcache_update(struct snd_soc_dapm_wcache *wcache,
struct snd_soc_dapm_widget *w)
{
wcache->widget = w;
}
/**
* snd_soc_dapm_force_bias_level() - Sets the DAPM bias level
* @dapm: The DAPM context for which to set the level
* @level: The level to set
*
* Forces the DAPM bias level to a specific state. It will call the bias level
* callback of DAPM context with the specified level. This will even happen if
* the context is already at the same level. Furthermore it will not go through
* the normal bias level sequencing, meaning any intermediate states between the
* current and the target state will not be entered.
*
* Note that the change in bias level is only temporary and the next time
* snd_soc_dapm_sync() is called the state will be set to the level as
* determined by the DAPM core. The function is mainly intended to be used to
* used during probe or resume from suspend to power up the device so
* initialization can be done, before the DAPM core takes over.
*/
int snd_soc_dapm_force_bias_level(struct snd_soc_dapm_context *dapm,
enum snd_soc_bias_level level)
{
int ret = 0;
if (dapm->set_bias_level)
ret = dapm->set_bias_level(dapm, level);
if (ret == 0)
dapm->bias_level = level;
return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_force_bias_level);
/**
* 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 (!card || dapm != &card->dapm)
ret = snd_soc_dapm_force_bias_level(dapm, 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;
}
/* connect mux widget to its interconnecting audio paths */
static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
struct snd_soc_dapm_path *path, const char *control_name,
struct snd_soc_dapm_widget *w)
{
const struct snd_kcontrol_new *kcontrol = &w->kcontrol_news[0];
struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
unsigned int val, item;
int i;
if (e->reg != SND_SOC_NOPM) {
soc_dapm_read(dapm, e->reg, &val);
val = (val >> e->shift_l) & e->mask;
item = snd_soc_enum_val_to_item(e, val);
} else {
/* 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.
*/
item = 0;
}
i = match_string(e->texts, e->items, control_name);
if (i < 0)
return -ENODEV;
path->name = e->texts[i];
path->connect = (i == item);
return 0;
}
/* set up initial codec paths */
static void dapm_set_mixer_path_status(struct snd_soc_dapm_path *p, int i,
int nth_path)
{
struct soc_mixer_control *mc = (struct soc_mixer_control *)
p->sink->kcontrol_news[i].private_value;
unsigned int reg = mc->reg;
unsigned int shift = mc->shift;
unsigned int max = mc->max;
unsigned int mask = (1 << fls(max)) - 1;
unsigned int invert = mc->invert;
unsigned int val;
if (reg != SND_SOC_NOPM) {
soc_dapm_read(p->sink->dapm, reg, &val);
/*
* The nth_path argument allows this function to know
* which path of a kcontrol it is setting the initial
* status for. Ideally this would support any number
* of paths and channels. But since kcontrols only come
* in mono and stereo variants, we are limited to 2
* channels.
*
* The following code assumes for stereo controls the
* first path is the left channel, and all remaining
* paths are the right channel.
*/
if (snd_soc_volsw_is_stereo(mc) && nth_path > 0) {
if (reg != mc->rreg)
soc_dapm_read(p->sink->dapm, mc->rreg, &val);
val = (val >> mc->rshift) & mask;
} else {
val = (val >> shift) & mask;
}
if (invert)
val = max - val;
p->connect = !!val;
} else {
p->connect = 0;
}
}
/* connect mixer widget to its interconnecting audio paths */
static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
struct snd_soc_dapm_path *path, const char *control_name)
{
int i, nth_path = 0;
/* search for mixer kcontrol */
for (i = 0; i < path->sink->num_kcontrols; i++) {
if (!strcmp(control_name, path->sink->kcontrol_news[i].name)) {
path->name = path->sink->kcontrol_news[i].name;
dapm_set_mixer_path_status(path, i, nth_path++);
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_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 = NULL;
const char *name;
int ret = 0;
prefix = soc_dapm_prefix(dapm);
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:
case snd_soc_dapm_pga:
case snd_soc_dapm_out_drv:
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_demux:
case snd_soc_dapm_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);
if (!kcontrol) {
ret = -ENOMEM;
goto exit_free;
}
kcontrol->private_free = dapm_kcontrol_free;
ret = dapm_kcontrol_data_alloc(w, kcontrol, name);
if (ret) {
snd_ctl_free_one(kcontrol);
goto exit_free;
}
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);
goto exit_free;
}
}
ret = dapm_kcontrol_add_widget(kcontrol, w);
if (ret == 0)
w->kcontrols[kci] = kcontrol;
exit_free:
kfree(long_name);
return ret;
}
/* 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;
struct dapm_kcontrol_data *data;
/* add kcontrol */
for (i = 0; i < w->num_kcontrols; i++) {
/* match name */
snd_soc_dapm_widget_for_each_source_path(w, path) {
/* mixer/mux paths name must match control name */
if (path->name != (char *)w->kcontrol_news[i].name)
continue;
if (!w->kcontrols[i]) {
ret = dapm_create_or_share_kcontrol(w, i);
if (ret < 0)
return ret;
}
dapm_kcontrol_add_path(w->kcontrols[i], path);
data = snd_kcontrol_chip(w->kcontrols[i]);
if (data->widget)
snd_soc_dapm_add_path(data->widget->dapm,
data->widget,
path->source,
NULL, NULL);
}
}
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;
enum snd_soc_dapm_direction dir;
struct snd_soc_dapm_path *path;
const char *type;
int ret;
switch (w->id) {
case snd_soc_dapm_mux:
dir = SND_SOC_DAPM_DIR_OUT;
type = "mux";
break;
case snd_soc_dapm_demux:
dir = SND_SOC_DAPM_DIR_IN;
type = "demux";
break;
default:
return -EINVAL;
}
if (w->num_kcontrols != 1) {
dev_err(dapm->dev,
"ASoC: %s %s has incorrect number of controls\n", type,
w->name);
return -EINVAL;
}
if (list_empty(&w->edges[dir])) {
dev_err(dapm->dev, "ASoC: %s %s has no paths\n", type, w->name);
return -EINVAL;
}
ret = dapm_create_or_share_kcontrol(w, 0);
if (ret < 0)
return ret;
snd_soc_dapm_widget_for_each_path(w, dir, path) {
if (path->name)
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)
{
int i, ret;
for (i = 0; i < w->num_kcontrols; i++) {
ret = dapm_create_or_share_kcontrol(w, i);
if (ret < 0)
return ret;
}
return 0;
}
/* create new dapm dai link control */
static int dapm_new_dai_link(struct snd_soc_dapm_widget *w)
{
int i, ret;
struct snd_kcontrol *kcontrol;
struct snd_soc_dapm_context *dapm = w->dapm;
struct snd_card *card = dapm->card->snd_card;
struct snd_soc_pcm_runtime *rtd = w->priv;
/* create control for links with > 1 config */
if (rtd->dai_link->num_params <= 1)
return 0;
/* add kcontrol */
for (i = 0; i < w->num_kcontrols; i++) {
kcontrol = snd_soc_cnew(&w->kcontrol_news[i], w,
w->name, NULL);
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, w->kcontrol_news[i].name, ret);
return ret;
}
kcontrol->private_data = w;
w->kcontrols[i] = kcontrol;
}
return 0;
}
/* 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;
}
}
static int dapm_widget_list_create(struct snd_soc_dapm_widget_list **list,
struct list_head *widgets)
{
struct snd_soc_dapm_widget *w;
struct list_head *it;
unsigned int size = 0;
unsigned int i = 0;
list_for_each(it, widgets)
size++;
*list = kzalloc(struct_size(*list, widgets, size), GFP_KERNEL);
if (*list == NULL)
return -ENOMEM;
list_for_each_entry(w, widgets, work_list)
(*list)->widgets[i++] = w;
(*list)->num_widgets = i;
return 0;
}
/*
* Common implementation for is_connected_output_ep() and
* is_connected_input_ep(). The function is inlined since the combined size of
* the two specialized functions is only marginally larger then the size of the
* generic function and at the same time the fast path of the specialized
* functions is significantly smaller than the generic function.
*/
static __always_inline int is_connected_ep(struct snd_soc_dapm_widget *widget,
struct list_head *list, enum snd_soc_dapm_direction dir,
int (*fn)(struct snd_soc_dapm_widget *, struct list_head *,
bool (*custom_stop_condition)(struct snd_soc_dapm_widget *,
enum snd_soc_dapm_direction)),
bool (*custom_stop_condition)(struct snd_soc_dapm_widget *,
enum snd_soc_dapm_direction))
{
enum snd_soc_dapm_direction rdir = SND_SOC_DAPM_DIR_REVERSE(dir);
struct snd_soc_dapm_path *path;
int con = 0;
if (widget->endpoints[dir] >= 0)
return widget->endpoints[dir];
DAPM_UPDATE_STAT(widget, path_checks);
/* do we need to add this widget to the list ? */
if (list)
list_add_tail(&widget->work_list, list);
if (custom_stop_condition && custom_stop_condition(widget, dir)) {
widget->endpoints[dir] = 1;
return widget->endpoints[dir];
}
if ((widget->is_ep & SND_SOC_DAPM_DIR_TO_EP(dir)) && widget->connected) {
widget->endpoints[dir] = snd_soc_dapm_suspend_check(widget);
return widget->endpoints[dir];
}
snd_soc_dapm_widget_for_each_path(widget, rdir, path) {
DAPM_UPDATE_STAT(widget, neighbour_checks);
if (path->weak || path->is_supply)
continue;
if (path->walking)
return 1;
trace_snd_soc_dapm_path(widget, dir, path);
if (path->connect) {
path->walking = 1;
con += fn(path->node[dir], list, custom_stop_condition);
path->walking = 0;
}
}
widget->endpoints[dir] = con;
return con;
}
/*
* Recursively check for a completed path to an active or physically connected
* output widget. Returns number of complete paths.
*
* Optionally, can be supplied with a function acting as a stopping condition.
* This function takes the dapm widget currently being examined and the walk
* direction as an arguments, it should return true if the walk should be
* stopped and false otherwise.
*/
static int is_connected_output_ep(struct snd_soc_dapm_widget *widget,
struct list_head *list,
bool (*custom_stop_condition)(struct snd_soc_dapm_widget *i,
enum snd_soc_dapm_direction))
{
return is_connected_ep(widget, list, SND_SOC_DAPM_DIR_OUT,
is_connected_output_ep, custom_stop_condition);
}
/*
* Recursively check for a completed path to an active or physically connected
* input widget. Returns number of complete paths.
*
* Optionally, can be supplied with a function acting as a stopping condition.
* This function takes the dapm widget currently being examined and the walk
* direction as an arguments, it should return true if the walk should be
* stopped and false otherwise.
*/
static int is_connected_input_ep(struct snd_soc_dapm_widget *widget,
struct list_head *list,
bool (*custom_stop_condition)(struct snd_soc_dapm_widget *i,
enum snd_soc_dapm_direction))
{
return is_connected_ep(widget, list, SND_SOC_DAPM_DIR_IN,
is_connected_input_ep, custom_stop_condition);
}
/**
* 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.
* @custom_stop_condition: (optional) a function meant to stop the widget graph
* walk based on custom logic.
*
* Queries DAPM graph as to whether a 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.
*
* Optionally, can be supplied with a function acting as a stopping condition.
* This function takes the dapm widget currently being examined and the walk
* direction as an arguments, it should return true if the walk should be
* stopped and false otherwise.
*
* 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,
bool (*custom_stop_condition)(struct snd_soc_dapm_widget *,
enum snd_soc_dapm_direction))
{
struct snd_soc_card *card = dai->component->card;
struct snd_soc_dapm_widget *w;
LIST_HEAD(widgets);
int paths;
int ret;
mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
/*
* For is_connected_{output,input}_ep fully discover the graph we need
* to reset the cached number of inputs and outputs.
*/
list_for_each_entry(w, &card->widgets, list) {
w->endpoints[SND_SOC_DAPM_DIR_IN] = -1;
w->endpoints[SND_SOC_DAPM_DIR_OUT] = -1;
}
if (stream == SNDRV_PCM_STREAM_PLAYBACK)
paths = is_connected_output_ep(dai->playback_widget, &widgets,
custom_stop_condition);
else
paths = is_connected_input_ep(dai->capture_widget, &widgets,
custom_stop_condition);
/* Drop starting point */
list_del(widgets.next);
ret = dapm_widget_list_create(list, &widgets);
if (ret)
paths = ret;
trace_snd_soc_dapm_connected(paths, stream);
mutex_unlock(&card->dapm_mutex);
return paths;
}
/*
* 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 pinctrl widget.
*/
int dapm_pinctrl_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol, int event)
{
struct snd_soc_dapm_pinctrl_priv *priv = w->priv;
struct pinctrl *p = w->pinctrl;
struct pinctrl_state *s;
if (!p || !priv)
return -EIO;
if (SND_SOC_DAPM_EVENT_ON(event))
s = pinctrl_lookup_state(p, priv->active_state);
else
s = pinctrl_lookup_state(p, priv->sleep_state);
if (IS_ERR(s))
return PTR_ERR(s);
return pinctrl_select_state(p, s);
}
EXPORT_SYMBOL_GPL(dapm_pinctrl_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);
if (SND_SOC_DAPM_EVENT_ON(event)) {
return clk_prepare_enable(w->clk);
} else {
clk_disable_unprepare(w->clk);
return 0;
}
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, NULL);
out = is_connected_output_ep(w, NULL, NULL);
return out != 0 && in != 0;
}
/* 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 */
snd_soc_dapm_widget_for_each_sink_path(w, path) {
DAPM_UPDATE_STAT(w, neighbour_checks);
if (path->weak)
continue;
if (path->connected &&
!path->connected(path->source, 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 w->connected;
}
static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
struct snd_soc_dapm_widget *b,
bool power_up)
{
int *sort;
BUILD_BUG_ON(ARRAY_SIZE(dapm_up_seq) != SND_SOC_DAPM_TYPE_COUNT);
BUILD_BUG_ON(ARRAY_SIZE(dapm_down_seq) != SND_SOC_DAPM_TYPE_COUNT);
if (power_up)
sort = dapm_up_seq;
else
sort = dapm_down_seq;
WARN_ONCE(sort[a->id] == 0, "offset a->id %d not initialized\n", a->id);
WARN_ONCE(sort[b->id] == 0, "offset b->id %d not initialized\n", b->id);
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_context *dapm;
struct snd_soc_dapm_widget *w;
int reg;
unsigned int value = 0;
unsigned int mask = 0;
w = list_first_entry(pending, struct snd_soc_dapm_widget, power_list);
reg = w->reg;
dapm = w->dapm;
list_for_each_entry(w, pending, power_list) {
WARN_ON(reg != w->reg || dapm != w->dapm);
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(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.
*/
pop_dbg(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_dapm_update_bits(dapm, 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_dapm_update_bits(w->dapm, update->reg, update->mask,
update->val);
if (ret < 0)
dev_err(w->dapm->dev, "ASoC: %s DAPM update failed: %d\n",
w->name, ret);
if (update->has_second_set) {
ret = soc_dapm_update_bits(w->dapm, update->reg2,
update->mask2, update->val2);
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 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 transition to ON or away from ON */
if ((d->target_bias_level == SND_SOC_BIAS_ON &&
d->bias_level != SND_SOC_BIAS_ON) ||
(d->target_bias_level != SND_SOC_BIAS_ON &&
d->bias_level == SND_SOC_BIAS_ON)) {
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.
*/
snd_soc_dapm_widget_for_each_source_path(w, path)
dapm_widget_set_peer_power(path->source, power, path->connect);
/* Supplies can't affect their outputs, only their inputs */
if (!w->is_supply) {
snd_soc_dapm_widget_for_each_sink_path(w, path)
dapm_widget_set_peer_power(path->sink, power,
path->connect);
}
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;
}
}
static bool dapm_idle_bias_off(struct snd_soc_dapm_context *dapm)
{
if (dapm->idle_bias_off)
return true;
switch (snd_power_get_state(dapm->card->snd_card)) {
case SNDRV_CTL_POWER_D3hot:
case SNDRV_CTL_POWER_D3cold:
return dapm->suspend_bias_off;
default:
break;
}
return false;
}
/*
* 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;
lockdep_assert_held(&card->dapm_mutex);
trace_snd_soc_dapm_start(card);
list_for_each_entry(d, &card->dapm_list, list) {
if (dapm_idle_bias_off(d))
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_pinctrl:
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 (!dapm_idle_bias_off(d))
d->target_bias_level = bias;
trace_snd_soc_dapm_walk_done(card);
/* Run card bias changes at first */
dapm_pre_sequence_async(&card->dapm, 0);
/* Run other bias changes in parallel */
list_for_each_entry(d, &card->dapm_list, list) {
if (d != &card->dapm && d->bias_level != d->target_bias_level)
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) {
if (d != &card->dapm && d->bias_level != d->target_bias_level)
async_schedule_domain(dapm_post_sequence_async, d,
&async_domain);
}
async_synchronize_full_domain(&async_domain);
/* Run card bias changes at last */
dapm_post_sequence_async(&card->dapm, 0);
/* 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;
struct snd_soc_card *card = w->dapm->card;
enum snd_soc_dapm_direction dir, rdir;
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;
mutex_lock(&card->dapm_mutex);
/* Supply widgets are not handled by is_connected_{input,output}_ep() */
if (w->is_supply) {
in = 0;
out = 0;
} else {
in = is_connected_input_ep(w, NULL, NULL);
out = is_connected_output_ep(w, NULL, NULL);
}
ret = scnprintf(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 += scnprintf(buf + ret, PAGE_SIZE - ret,
" - R%d(0x%x) mask 0x%x",
w->reg, w->reg, w->mask << w->shift);
ret += scnprintf(buf + ret, PAGE_SIZE - ret, "\n");
if (w->sname)
ret += scnprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
w->sname,
w->active ? "active" : "inactive");
snd_soc_dapm_for_each_direction(dir) {
rdir = SND_SOC_DAPM_DIR_REVERSE(dir);
snd_soc_dapm_widget_for_each_path(w, dir, p) {
if (p->connected && !p->connected(p->source, p->sink))
continue;
if (!p->connect)
continue;
ret += scnprintf(buf + ret, PAGE_SIZE - ret,
" %s \"%s\" \"%s\"\n",
(rdir == SND_SOC_DAPM_DIR_IN) ? "in" : "out",
p->name ? p->name : "static",
p->node[rdir]->name);
}
}
mutex_unlock(&card->dapm_mutex);
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;
if (!parent)
return;
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
/*
* soc_dapm_connect_path() - Connects or disconnects a path
* @path: The path to update
* @connect: The new connect state of the path. True if the path is connected,
* false if it is disconnected.
* @reason: The reason why the path changed (for debugging only)
*/
static void soc_dapm_connect_path(struct snd_soc_dapm_path *path,
bool connect, const char *reason)
{
if (path->connect == connect)
return;
path->connect = connect;
dapm_mark_dirty(path->source, reason);
dapm_mark_dirty(path->sink, reason);
dapm_path_invalidate(path);
}
/* 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;
bool connect;
lockdep_assert_held(&card->dapm_mutex);
/* find dapm widget path assoc with kcontrol */
dapm_kcontrol_for_each_path(path, kcontrol) {
found = 1;
/* we now need to match the string in the enum to the path */
if (!(strcmp(path->name, e->texts[mux])))
connect = true;
else
connect = false;
soc_dapm_connect_path(path, connect, "mux update");
}
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, int rconnect)
{
struct snd_soc_dapm_path *path;
int found = 0;
lockdep_assert_held(&card->dapm_mutex);
/* find dapm widget path assoc with kcontrol */
dapm_kcontrol_for_each_path(path, kcontrol) {
/*
* Ideally this function should support any number of
* paths and channels. But since kcontrols only come
* in mono and stereo variants, we are limited to 2
* channels.
*
* The following code assumes for stereo controls the
* first path (when 'found == 0') is the left channel,
* and all remaining paths (when 'found == 1') are the
* right channel.
*
* A stereo control is signified by a valid 'rconnect'
* value, either 0 for unconnected, or >= 0 for connected.
* This is chosen instead of using snd_soc_volsw_is_stereo,
* so that the behavior of snd_soc_dapm_mixer_update_power
* doesn't change even when the kcontrol passed in is
* stereo.
*
* It passes 'connect' as the path connect status for
* the left channel, and 'rconnect' for the right
* channel.
*/
if (found && rconnect >= 0)
soc_dapm_connect_path(path, rconnect, "mixer update");
else
soc_dapm_connect_path(path, connect, "mixer update");
found = 1;
}
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, -1);
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);
static ssize_t dapm_widget_show_component(struct snd_soc_component *cmpnt,
char *buf)
{
struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(cmpnt);
struct snd_soc_dapm_widget *w;
int count = 0;
char *state = "not set";
/* card won't be set for the dummy component, as a spot fix
* we're checking for that case specifically here but in future
* we will ensure that the dummy component looks like others.
*/
if (!cmpnt->card)
return 0;
list_for_each_entry(w, &cmpnt->card->widgets, list) {
if (w->dapm != dapm)
continue;
/* only display widgets that burn 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_pinctrl:
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 (snd_soc_dapm_get_bias_level(dapm)) {
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;
}
/* 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_dai *codec_dai;
int i, count = 0;
mutex_lock(&rtd->card->dapm_mutex);
for_each_rtd_codec_dai(rtd, i, codec_dai) {
struct snd_soc_component *cmpnt = codec_dai->component;
count += dapm_widget_show_component(cmpnt, buf + count);
}
mutex_unlock(&rtd->card->dapm_mutex);
return count;
}
static DEVICE_ATTR_RO(dapm_widget);
struct attribute *soc_dapm_dev_attrs[] = {
&dev_attr_dapm_widget.attr,
NULL
};
static void dapm_free_path(struct snd_soc_dapm_path *path)
{
list_del(&path->list_node[SND_SOC_DAPM_DIR_IN]);
list_del(&path->list_node[SND_SOC_DAPM_DIR_OUT]);
list_del(&path->list_kcontrol);
list_del(&path->list);
kfree(path);
}
void snd_soc_dapm_free_widget(struct snd_soc_dapm_widget *w)
{
struct snd_soc_dapm_path *p, *next_p;
enum snd_soc_dapm_direction dir;
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.
*/
snd_soc_dapm_for_each_direction(dir) {
snd_soc_dapm_widget_for_each_path_safe(w, dir, p, next_p)
dapm_free_path(p);
}
kfree(w->kcontrols);
kfree_const(w->name);
kfree_const(w->sname);
kfree(w);
}
void snd_soc_dapm_reset_cache(struct snd_soc_dapm_context *dapm)
{
dapm->path_sink_cache.widget = NULL;
dapm->path_source_cache.widget = NULL;
}
/* 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;
list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
if (w->dapm != dapm)
continue;
snd_soc_dapm_free_widget(w);
}
snd_soc_dapm_reset_cache(dapm);
}
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);
dapm_assert_locked(dapm);
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");
dapm_widget_invalidate_input_paths(w);
dapm_widget_invalidate_output_paths(w);
}
w->connected = status;
if (status == 0)
w->force = 0;
return 0;
}
/**
* snd_soc_dapm_sync_unlocked - scan and power dapm paths
* @dapm: DAPM context
*
* Walks all dapm audio paths and powers widgets according to their
* stream or path usage.
*
* Requires external locking.
*
* Returns 0 for success.
*/
int snd_soc_dapm_sync_unlocked(struct snd_soc_dapm_context *dapm)
{
/*
* Suppress early reports (eg, jacks syncing their state) to avoid
* silly DAPM runs during card startup.
*/
if (!dapm->card || !dapm->card->instantiated)
return 0;
return dapm_power_widgets(dapm->card, SND_SOC_DAPM_STREAM_NOP);
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_sync_unlocked);
/**
* 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;
mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
ret = snd_soc_dapm_sync_unlocked(dapm);
mutex_unlock(&dapm->card->dapm_mutex);
return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
static int dapm_update_dai_chan(struct snd_soc_dapm_path *p,
struct snd_soc_dapm_widget *w,
int channels)
{
switch (w->id) {
case snd_soc_dapm_aif_out:
case snd_soc_dapm_aif_in:
break;
default:
return 0;
}
dev_dbg(w->dapm->dev, "%s DAI route %s -> %s\n",
w->channel < channels ? "Connecting" : "Disconnecting",
p->source->name, p->sink->name);
if (w->channel < channels)
soc_dapm_connect_path(p, true, "dai update");
else
soc_dapm_connect_path(p, false, "dai update");
return 0;
}
static int dapm_update_dai_unlocked(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
int dir = substream->stream;
int channels = params_channels(params);
struct snd_soc_dapm_path *p;
struct snd_soc_dapm_widget *w;
int ret;
if (dir == SNDRV_PCM_STREAM_PLAYBACK)
w = dai->playback_widget;
else
w = dai->capture_widget;
if (!w)
return 0;
dev_dbg(dai->dev, "Update DAI routes for %s %s\n", dai->name,
dir == SNDRV_PCM_STREAM_PLAYBACK ? "playback" : "capture");
snd_soc_dapm_widget_for_each_sink_path(w, p) {
ret = dapm_update_dai_chan(p, p->sink, channels);
if (ret < 0)
return ret;
}
snd_soc_dapm_widget_for_each_source_path(w, p) {
ret = dapm_update_dai_chan(p, p->source, channels);
if (ret < 0)
return ret;
}
return 0;
}
int snd_soc_dapm_update_dai(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
int ret;
mutex_lock_nested(&rtd->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
ret = dapm_update_dai_unlocked(substream, params, dai);
mutex_unlock(&rtd->card->dapm_mutex);
return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_update_dai);
/*
* dapm_update_widget_flags() - Re-compute widget sink and source flags
* @w: The widget for which to update the flags
*
* Some widgets have a dynamic category which depends on which neighbors they
* are connected to. This function update the category for these widgets.
*
* This function must be called whenever a path is added or removed to a widget.
*/
static void dapm_update_widget_flags(struct snd_soc_dapm_widget *w)
{
enum snd_soc_dapm_direction dir;
struct snd_soc_dapm_path *p;
unsigned int ep;
switch (w->id) {
case snd_soc_dapm_input:
/* On a fully routed card an input is never a source */
if (w->dapm->card->fully_routed)
return;
ep = SND_SOC_DAPM_EP_SOURCE;
snd_soc_dapm_widget_for_each_source_path(w, p) {
if (p->source->id == snd_soc_dapm_micbias ||
p->source->id == snd_soc_dapm_mic ||
p->source->id == snd_soc_dapm_line ||
p->source->id == snd_soc_dapm_output) {
ep = 0;
break;
}
}
break;
case snd_soc_dapm_output:
/* On a fully routed card a output is never a sink */
if (w->dapm->card->fully_routed)
return;
ep = SND_SOC_DAPM_EP_SINK;
snd_soc_dapm_widget_for_each_sink_path(w, p) {
if (p->sink->id == snd_soc_dapm_spk ||
p->sink->id == snd_soc_dapm_hp ||
p->sink->id == snd_soc_dapm_line ||
p->sink->id == snd_soc_dapm_input) {
ep = 0;
break;
}
}
break;
case snd_soc_dapm_line:
ep = 0;
snd_soc_dapm_for_each_direction(dir) {
if (!list_empty(&w->edges[dir]))
ep |= SND_SOC_DAPM_DIR_TO_EP(dir);
}
break;
default:
return;
}
w->is_ep = ep;
}
static int snd_soc_dapm_check_dynamic_path(struct snd_soc_dapm_context *dapm,
struct snd_soc_dapm_widget *source, struct snd_soc_dapm_widget *sink,
const char *control)
{
bool dynamic_source = false;
bool dynamic_sink = false;
if (!control)
return 0;
switch (source->id) {
case snd_soc_dapm_demux:
dynamic_source = true;
break;
default:
break;
}
switch (sink->id) {
case snd_soc_dapm_mux:
case snd_soc_dapm_switch:
case snd_soc_dapm_mixer:
case snd_soc_dapm_mixer_named_ctl:
dynamic_sink = true;
break;
default:
break;
}
if (dynamic_source && dynamic_sink) {
dev_err(dapm->dev,
"Direct connection between demux and mixer/mux not supported for path %s -> [%s] -> %s\n",
source->name, control, sink->name);
return -EINVAL;
} else if (!dynamic_source && !dynamic_sink) {
dev_err(dapm->dev,
"Control not supported for path %s -> [%s] -> %s\n",
source->name, control, sink->name);
return -EINVAL;
}
return 0;
}
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_widget *widgets[2];
enum snd_soc_dapm_direction dir;
struct snd_soc_dapm_path *path;
int ret;
if (wsink->is_supply && !wsource->is_supply) {
dev_err(dapm->dev,
"Connecting non-supply widget to supply widget is not supported (%s -> %s)\n",
wsource->name, wsink->name);
return -EINVAL;
}
if (connected && !wsource->is_supply) {
dev_err(dapm->dev,
"connected() callback only supported for supply widgets (%s -> %s)\n",
wsource->name, wsink->name);
return -EINVAL;
}
if (wsource->is_supply && control) {
dev_err(dapm->dev,
"Conditional paths are not supported for supply widgets (%s -> [%s] -> %s)\n",
wsource->name, control, wsink->name);
return -EINVAL;
}
ret = snd_soc_dapm_check_dynamic_path(dapm, wsource, wsink, control);
if (ret)
return ret;