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linux_dsm_epyc7002/sound/soc/soc-dapm.c
Silvio Cesare e581e151e9
ASoC: dapm: change snprintf to scnprintf for possible overflow 
Change snprintf to scnprintf. There are generally two cases where using
snprintf causes problems.

1) Uses of size += snprintf(buf, SIZE - size, fmt, ...)
In this case, if snprintf would have written more characters than what the
buffer size (SIZE) is, then size will end up larger than SIZE. In later
uses of snprintf, SIZE - size will result in a negative number, leading
to problems. Note that size might already be too large by using
size = snprintf before the code reaches a case of size += snprintf.

2) If size is ultimately used as a length parameter for a copy back to user
space, then it will potentially allow for a buffer overflow and information
disclosure when size is greater than SIZE. When the size is used to index
the buffer directly, we can have memory corruption. This also means when
size = snprintf... is used, it may also cause problems since size may become
large.  Copying to userspace is mitigated by the HARDENED_USERCOPY kernel
configuration.

The solution to these issues is to use scnprintf which returns the number of
characters actually written to the buffer, so the size variable will never
exceed SIZE.

Signed-off-by: Silvio Cesare <silvio.cesare@gmail.com>
Cc: Liam Girdwood <lgirdwood@gmail.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-01-15 19:01:16 +00:00

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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] = 0,
[snd_soc_dapm_regulator_supply] = 1,
[snd_soc_dapm_pinctrl] = 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_demux] = 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_demux] = 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_pinctrl] = 13,
[snd_soc_dapm_regulator_supply] = 13,
[snd_soc_dapm_post] = 14,
};
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));
}
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)
{
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, 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;
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_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(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);
/*
* 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;
path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
if (!path)
return -ENOMEM;
path->node[SND_SOC_DAPM_DIR_IN] = wsource;
path->node[SND_SOC_DAPM_DIR_OUT] = wsink;
widgets[SND_SOC_DAPM_DIR_IN] = wsource;
widgets[SND_SOC_DAPM_DIR_OUT] = wsink;
path->connected = connected;
INIT_LIST_HEAD(&path->list);
INIT_LIST_HEAD(&path->list_kcontrol);
if (wsource->is_supply || wsink->is_supply)
path->is_supply = 1;
/* connect static paths */
if (control == NULL) {
path->connect = 1;
} else {
switch (wsource->id) {
case snd_soc_dapm_demux:
ret = dapm_connect_mux(dapm, path, control, wsource);
if (ret)
goto err;
break;
default:
break;
}
switch (wsink->id) {
case snd_soc_dapm_mux:
ret = dapm_connect_mux(dapm, path, control, wsink);
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, path, control);
if (ret != 0)
goto err;
break;
default:
break;
}
}
list_add(&path->list, &dapm->card->paths);
snd_soc_dapm_for_each_direction(dir)
list_add(&path->list_node[dir], &widgets[dir]->edges[dir]);
snd_soc_dapm_for_each_direction(dir) {
dapm_update_widget_flags(widgets[dir]);
dapm_mark_dirty(widgets[dir], "Route added");
}
if (dapm->card->instantiated && path->connect)
dapm_path_invalidate(path);
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)
{
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];
const char *prefix;
int ret;
prefix = soc_dapm_prefix(dapm);
if (prefix) {
snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
prefix, route->sink);
sink = prefixed_sink;
snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
prefix, route->source);
source = prefixed_source;
} else {
sink = route->sink;
source = route->source;
}
wsource = dapm_wcache_lookup(&dapm->path_source_cache, source);
wsink = dapm_wcache_lookup(&dapm->path_sink_cache, sink);
if (wsink && wsource)
goto skip_search;
/*
* 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;
if (wsource)
break;
}
continue;
}
if (!wsource && !(strcmp(w->name, source))) {
wtsource = w;
if (w->dapm == dapm) {
wsource = w;
if (wsink)
break;
}
}
}
/* 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;
}
skip_search:
dapm_wcache_update(&dapm->path_sink_cache, wsink);
dapm_wcache_update(&dapm->path_source_cache, wsource);
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_widget *wsource, *wsink;
struct snd_soc_dapm_path *path, *p;
const char *sink;
const char *source;
char prefixed_sink[80];
char prefixed_source[80];
const char *prefix;
if (route->control) {
dev_err(dapm->dev,
"ASoC: Removal of routes with controls not supported\n");
return -EINVAL;
}
prefix = soc_dapm_prefix(dapm);
if (prefix) {
snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
prefix, route->sink);
sink = prefixed_sink;
snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
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) {
wsource = path->source;
wsink = path->sink;
dapm_mark_dirty(wsource, "Route removed");
dapm_mark_dirty(wsink, "Route removed");
if (path->connect)
dapm_path_invalidate(path);
dapm_free_path(path);
/* Update any path related flags */
dapm_update_widget_flags(wsource);
dapm_update_widget_flags(wsink);
} 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_RUNTIME);
for (i = 0; i < num; i++) {
r = snd_soc_dapm_add_route(dapm, route);
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;
mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
for (i = 0; i < num; i++) {
snd_soc_dapm_del_route(dapm, route);
route++;
}
mutex_unlock(&dapm->card->dapm_mutex);
return 0;
}
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);
snd_soc_dapm_widget_for_each_sink_path(source, path) {
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
* @card: card to be checked for new dapm widgets
*
* 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)
{
if (w->new)
continue;
if (w->num_kcontrols) {
w->kcontrols = kcalloc(w->num_kcontrols,
sizeof(struct snd_kcontrol *),
GFP_KERNEL);
if (!w->kcontrols) {
mutex_unlock(&card->dapm_mutex);
return -ENOMEM;
}
}
switch(w->id) {
case snd_soc_dapm_switch:
case snd_soc_dapm_mixer:
case snd_soc_dapm_mixer_named_ctl:
dapm_new_mixer(w);
break;
case snd_soc_dapm_mux:
case snd_soc_dapm_demux:
dapm_new_mux(w);
break;
case snd_soc_dapm_pga:
case snd_soc_dapm_out_drv:
dapm_new_pga(w);
break;
case snd_soc_dapm_dai_link:
dapm_new_dai_link(w);
break;
default:
break;
}
/* Read the initial power state from the device */
if (w->reg >= 0) {
soc_dapm_read(w->dapm, w->reg, &val);
val = val >> w->shift;
val &= w->mask;
if (val == w->on_val)
w->power = 1;
}
w->new = 1;
dapm_mark_dirty(w, "new widget");
dapm_debugfs_add_widget(w);
}
dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
mutex_unlock(&card->dapm_mutex);
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
/**
* snd_soc_dapm_get_volsw - dapm mixer get callback
* @kcontrol: mixer control
* @ucontrol: control element information
*
* Callback to get the value of a dapm mixer control.
*
* Returns 0 for success.
*/
int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
struct snd_soc_card *card = dapm->card;
struct soc_mixer_control *mc =
(struct soc_mixer_control *)kcontrol->private_value;
int reg = mc->reg;
unsigned int shift = mc->shift;
int max = mc->max;
unsigned int width = fls(max);
unsigned int mask = (1 << fls(max)) - 1;
unsigned int invert = mc->invert;
unsigned int reg_val, val, rval = 0;
int ret = 0;
mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
if (dapm_kcontrol_is_powered(kcontrol) && reg != SND_SOC_NOPM) {
ret = soc_dapm_read(dapm, reg, &reg_val);
val = (reg_val >> shift) & mask;
if (ret == 0 && reg != mc->rreg)
ret = soc_dapm_read(dapm, mc->rreg, &reg_val);
if (snd_soc_volsw_is_stereo(mc))
rval = (reg_val >> mc->rshift) & mask;
} else {
reg_val = dapm_kcontrol_get_value(kcontrol);
val = reg_val & mask;
if (snd_soc_volsw_is_stereo(mc))
rval = (reg_val >> width) & mask;
}
mutex_unlock(&card->dapm_mutex);
if (ret)
return ret;
if (invert)
ucontrol->value.integer.value[0] = max - val;
else
ucontrol->value.integer.value[0] = val;
if (snd_soc_volsw_is_stereo(mc)) {
if (invert)
ucontrol->value.integer.value[1] = max - rval;
else
ucontrol->value.integer.value[1] = rval;
}
return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
/**
* snd_soc_dapm_put_volsw - dapm mixer set callback
* @kcontrol: mixer control
* @ucontrol: control element information
*
* Callback to set the value of a dapm mixer control.
*
* Returns 0 for success.
*/
int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
struct snd_soc_card *card = dapm->card;
struct soc_mixer_control *mc =
(struct soc_mixer_control *)kcontrol->private_value;
int reg = mc->reg;
unsigned int shift = mc->shift;
int max = mc->max;
unsigned int width = fls(max);
unsigned int mask = (1 << width) - 1;
unsigned int invert = mc->invert;
unsigned int val, rval = 0;
int connect, rconnect = -1, change, reg_change = 0;
struct snd_soc_dapm_update update = {};
int ret = 0;
val = (ucontrol->value.integer.value[0] & mask);
connect = !!val;
if (invert)
val = max - val;
if (snd_soc_volsw_is_stereo(mc)) {
rval = (ucontrol->value.integer.value[1] & mask);
rconnect = !!rval;
if (invert)
rval = max - rval;
}
mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
/* This assumes field width < (bits in unsigned int / 2) */
if (width > sizeof(unsigned int) * 8 / 2)
dev_warn(dapm->dev,
"ASoC: control %s field width limit exceeded\n",
kcontrol->id.name);
change = dapm_kcontrol_set_value(kcontrol, val | (rval << width));
if (reg != SND_SOC_NOPM) {
val = val << shift;
rval = rval << mc->rshift;
reg_change = soc_dapm_test_bits(dapm, reg, mask << shift, val);
if (snd_soc_volsw_is_stereo(mc))
reg_change |= soc_dapm_test_bits(dapm, mc->rreg,
mask << mc->rshift,
rval);
}
if (change || reg_change) {
if (reg_change) {
if (snd_soc_volsw_is_stereo(mc)) {
update.has_second_set = true;
update.reg2 = mc->rreg;
update.mask2 = mask << mc->rshift;
update.val2 = rval;
}
update.kcontrol = kcontrol;
update.reg = reg;
update.mask = mask << shift;
update.val = val;
card->update = &update;
}
change |= reg_change;
ret = soc_dapm_mixer_update_power(card, kcontrol, connect,
rconnect);
card->update = NULL;
}
mutex_unlock(&card->dapm_mutex);
if (ret > 0)
soc_dpcm_runtime_update(card);
return change;
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
/**
* snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
* @kcontrol: mixer control
* @ucontrol: control element information
*
* Callback to get the value of a dapm enumerated double mixer control.
*
* Returns 0 for success.
*/
int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
struct snd_soc_card *card = dapm->card;
struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
unsigned int reg_val, val;
mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
if (e->reg != SND_SOC_NOPM && dapm_kcontrol_is_powered(kcontrol)) {
int ret = soc_dapm_read(dapm, e->reg, &reg_val);
if (ret) {
mutex_unlock(&card->dapm_mutex);
return ret;
}
} else {
reg_val = dapm_kcontrol_get_value(kcontrol);
}
mutex_unlock(&card->dapm_mutex);
val = (reg_val >> e->shift_l) & e->mask;
ucontrol->value.enumerated.item[0] = snd_soc_enum_val_to_item(e, val);
if (e->shift_l != e->shift_r) {
val = (reg_val >> e->shift_r) & e->mask;
val = snd_soc_enum_val_to_item(e, val);
ucontrol->value.enumerated.item[1] = val;
}
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
/**
* snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
* @kcontrol: mixer control
* @ucontrol: control element information
*
* Callback to set the value of a dapm enumerated double mixer control.
*
* Returns 0 for success.
*/
int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
struct snd_soc_card *card = dapm->card;
struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
unsigned int *item = ucontrol->value.enumerated.item;
unsigned int val, change, reg_change = 0;
unsigned int mask;
struct snd_soc_dapm_update update = {};
int ret = 0;
if (item[0] >= e->items)
return -EINVAL;
val = snd_soc_enum_item_to_val(e, item[0]) << e->shift_l;
mask = e->mask << e->shift_l;
if (e->shift_l != e->shift_r) {
if (item[1] > e->items)
return -EINVAL;
val |= snd_soc_enum_item_to_val(e, item[1]) << e->shift_r;
mask |= e->mask << e->shift_r;
}
mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
change = dapm_kcontrol_set_value(kcontrol, val);
if (e->reg != SND_SOC_NOPM)
reg_change = soc_dapm_test_bits(dapm, e->reg, mask, val);
if (change || reg_change) {
if (reg_change) {
update.kcontrol = kcontrol;
update.reg = e->reg;
update.mask = mask;
update.val = val;
card->update = &update;
}
change |= reg_change;
ret = soc_dapm_mux_update_power(card, kcontrol, item[0], e);
card->update = NULL;
}
mutex_unlock(&card->dapm_mutex);
if (ret > 0)
soc_dpcm_runtime_update(card);
return change;
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
/**
* snd_soc_dapm_info_pin_switch - Info for a pin switch
*
* @kcontrol: mixer control
* @uinfo: control element information
*
* Callback to provide information about a pin switch control.
*/
int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
uinfo->count = 1;
uinfo->value.integer.min = 0;
uinfo->value.integer.max = 1;
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
/**
* snd_soc_dapm_get_pin_switch - Get information for a pin switch
*
* @kcontrol: mixer control
* @ucontrol: Value
*/
int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
const char *pin = (const char *)kcontrol->private_value;
mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
ucontrol->value.integer.value[0] =
snd_soc_dapm_get_pin_status(&card->dapm, pin);
mutex_unlock(&card->dapm_mutex);
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
/**
* snd_soc_dapm_put_pin_switch - Set information for a pin switch
*
* @kcontrol: mixer control
* @ucontrol: Value
*/
int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
const char *pin = (const char *)kcontrol->private_value;
if (ucontrol->value.integer.value[0])
snd_soc_dapm_enable_pin(&card->dapm, pin);
else
snd_soc_dapm_disable_pin(&card->dapm, pin);
snd_soc_dapm_sync(&card->dapm);
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
struct snd_soc_dapm_widget *
snd_soc_dapm_new_control_unlocked(struct snd_soc_dapm_context *dapm,
const struct snd_soc_dapm_widget *widget)
{
enum snd_soc_dapm_direction dir;
struct snd_soc_dapm_widget *w;
const char *prefix;
int ret;
if ((w = dapm_cnew_widget(widget)) == NULL)
return ERR_PTR(-ENOMEM);
switch (w->id) {
case snd_soc_dapm_regulator_supply:
w->regulator = devm_regulator_get(dapm->dev, w->name);
if (IS_ERR(w->regulator)) {
ret = PTR_ERR(w->regulator);
goto request_failed;
}
if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
ret = regulator_allow_bypass(w->regulator, true);
if (ret != 0)
dev_warn(dapm->dev,
"ASoC: Failed to bypass %s: %d\n",
w->name, ret);
}
break;
case snd_soc_dapm_pinctrl:
w->pinctrl = devm_pinctrl_get(dapm->dev);
if (IS_ERR(w->pinctrl)) {
ret = PTR_ERR(w->pinctrl);
goto request_failed;
}
break;
case snd_soc_dapm_clock_supply:
w->clk = devm_clk_get(dapm->dev, w->name);
if (IS_ERR(w->clk)) {
ret = PTR_ERR(w->clk);
goto request_failed;
}
break;
default:
break;
}
prefix = soc_dapm_prefix(dapm);
if (prefix)
w->name = kasprintf(GFP_KERNEL, "%s %s", prefix, widget->name);
else
w->name = kstrdup_const(widget->name, GFP_KERNEL);
if (w->name == NULL) {
kfree(w);
return ERR_PTR(-ENOMEM);
}
switch (w->id) {
case snd_soc_dapm_mic:
w->is_ep = SND_SOC_DAPM_EP_SOURCE;
w->power_check = dapm_generic_check_power;
break;
case snd_soc_dapm_input:
if (!dapm->card->fully_routed)
w->is_ep = SND_SOC_DAPM_EP_SOURCE;
w->power_check = dapm_generic_check_power;
break;
case snd_soc_dapm_spk:
case snd_soc_dapm_hp:
w->is_ep = SND_SOC_DAPM_EP_SINK;
w->power_check = dapm_generic_check_power;
break;
case snd_soc_dapm_output:
if (!dapm->card->fully_routed)
w->is_ep = SND_SOC_DAPM_EP_SINK;
w->power_check = dapm_generic_check_power;
break;
case snd_soc_dapm_vmid:
case snd_soc_dapm_siggen:
w->is_ep = SND_SOC_DAPM_EP_SOURCE;
w->power_check = dapm_always_on_check_power;
break;
case snd_soc_dapm_sink:
w->is_ep = SND_SOC_DAPM_EP_SINK;
w->power_check = dapm_always_on_check_power;
break;
case snd_soc_dapm_mux:
case snd_soc_dapm_demux:
case snd_soc_dapm_switch:
case snd_soc_dapm_mixer:
case snd_soc_dapm_mixer_named_ctl:
case snd_soc_dapm_adc:
case snd_soc_dapm_aif_out:
case snd_soc_dapm_dac:
case snd_soc_dapm_aif_in:
case snd_soc_dapm_pga:
case snd_soc_dapm_out_drv:
case snd_soc_dapm_micbias:
case snd_soc_dapm_line:
case snd_soc_dapm_dai_link:
case snd_soc_dapm_dai_out:
case snd_soc_dapm_dai_in:
w->power_check = dapm_generic_check_power;
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_kcontrol:
w->is_supply = 1;
w->power_check = dapm_supply_check_power;
break;
default:
w->power_check = dapm_always_on_check_power;
break;
}
w->dapm = dapm;
INIT_LIST_HEAD(&w->list);
INIT_LIST_HEAD(&w->dirty);
list_add_tail(&w->list, &dapm->card->widgets);
snd_soc_dapm_for_each_direction(dir) {
INIT_LIST_HEAD(&w->edges[dir]);
w->endpoints[dir] = -1;
}
/* machine layer sets up unconnected pins and insertions */
w->connected = 1;
return w;
request_failed:
if (ret != -EPROBE_DEFER)
dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n",
w->name, ret);
return ERR_PTR(ret);
}
/**
* snd_soc_dapm_new_control - create new dapm control
* @dapm: DAPM context
* @widget: widget template
*
* Creates new DAPM control based upon a template.
*
* Returns a widget pointer on success or an error pointer on failure
*/
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 *w;
mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
w = snd_soc_dapm_new_control_unlocked(dapm, widget);
mutex_unlock(&dapm->card->dapm_mutex);
return w;
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
/**
* snd_soc_dapm_new_controls - create new dapm controls
* @dapm: DAPM context
* @widget: widget array
* @num: number of widgets
*
* Creates new DAPM controls based upon the templates.
*
* Returns 0 for success else error.
*/
int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
const struct snd_soc_dapm_widget *widget,
int num)
{
struct snd_soc_dapm_widget *w;
int i;
int ret = 0;
mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
for (i = 0; i < num; i++) {
w = snd_soc_dapm_new_control_unlocked(dapm, widget);
if (IS_ERR(w)) {
ret = PTR_ERR(w);
break;
}
widget++;
}
mutex_unlock(&dapm->card->dapm_mutex);
return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
static int snd_soc_dai_link_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol, int event)
{
struct snd_soc_dapm_path *path;
struct snd_soc_dai *source, *sink;
struct snd_soc_pcm_runtime *rtd = w->priv;
const struct snd_soc_pcm_stream *config;
struct snd_pcm_substream substream;
struct snd_pcm_hw_params *params = NULL;
struct snd_pcm_runtime *runtime = NULL;
unsigned int fmt;
int ret = 0;
config = rtd->dai_link->params + rtd->params_select;
if (WARN_ON(!config) ||
WARN_ON(list_empty(&w->edges[SND_SOC_DAPM_DIR_OUT]) ||
list_empty(&w->edges[SND_SOC_DAPM_DIR_IN])))
return -EINVAL;
/* Be a little careful as we don't want to overflow the mask array */
if (config->formats) {
fmt = ffs(config->formats) - 1;
} else {
dev_warn(w->dapm->dev, "ASoC: Invalid format %llx specified\n",
config->formats);
fmt = 0;
}
/* Currently very limited parameter selection */
params = kzalloc(sizeof(*params), GFP_KERNEL);
if (!params) {
ret = -ENOMEM;
goto out;
}
snd_mask_set(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), fmt);
hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->min =
config->rate_min;
hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->max =
config->rate_max;
hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->min
= config->channels_min;
hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->max
= config->channels_max;
memset(&substream, 0, sizeof(substream));
/* Allocate a dummy snd_pcm_runtime for startup() and other ops() */
runtime = kzalloc(sizeof(*runtime), GFP_KERNEL);
if (!runtime) {
ret = -ENOMEM;
goto out;
}
substream.runtime = runtime;
substream.private_data = rtd;
switch (event) {
case SND_SOC_DAPM_PRE_PMU:
substream.stream = SNDRV_PCM_STREAM_CAPTURE;
snd_soc_dapm_widget_for_each_source_path(w, path) {
source = path->source->priv;
if (source->driver->ops->startup) {
ret = source->driver->ops->startup(&substream,
source);
if (ret < 0) {
dev_err(source->dev,
"ASoC: startup() failed: %d\n",
ret);
goto out;
}
source->active++;
}
ret = soc_dai_hw_params(&substream, params, source);
if (ret < 0)
goto out;
}
substream.stream = SNDRV_PCM_STREAM_PLAYBACK;
snd_soc_dapm_widget_for_each_sink_path(w, path) {
sink = path->sink->priv;
if (sink->driver->ops->startup) {
ret = sink->driver->ops->startup(&substream,
sink);
if (ret < 0) {
dev_err(sink->dev,
"ASoC: startup() failed: %d\n",
ret);
goto out;
}
sink->active++;
}
ret = soc_dai_hw_params(&substream, params, sink);
if (ret < 0)
goto out;
}
break;
case SND_SOC_DAPM_POST_PMU:
snd_soc_dapm_widget_for_each_sink_path(w, path) {
sink = path->sink->priv;
ret = snd_soc_dai_digital_mute(sink, 0,
SNDRV_PCM_STREAM_PLAYBACK);
if (ret != 0 && ret != -ENOTSUPP)
dev_warn(sink->dev,
"ASoC: Failed to unmute: %d\n", ret);
ret = 0;
}
break;
case SND_SOC_DAPM_PRE_PMD:
snd_soc_dapm_widget_for_each_sink_path(w, path) {
sink = path->sink->priv;
ret = snd_soc_dai_digital_mute(sink, 1,
SNDRV_PCM_STREAM_PLAYBACK);
if (ret != 0 && ret != -ENOTSUPP)
dev_warn(sink->dev,
"ASoC: Failed to mute: %d\n", ret);
ret = 0;
}
substream.stream = SNDRV_PCM_STREAM_CAPTURE;
snd_soc_dapm_widget_for_each_source_path(w, path) {
source = path->source->priv;
if (source->driver->ops->hw_free)
source->driver->ops->hw_free(&substream,
source);
source->active--;
if (source->driver->ops->shutdown)
source->driver->ops->shutdown(&substream,
source);
}
substream.stream = SNDRV_PCM_STREAM_PLAYBACK;
snd_soc_dapm_widget_for_each_sink_path(w, path) {
sink = path->sink->priv;
if (sink->driver->ops->hw_free)
sink->driver->ops->hw_free(&substream, sink);
sink->active--;
if (sink->driver->ops->shutdown)
sink->driver->ops->shutdown(&substream, sink);
}
break;
default:
WARN(1, "Unknown event %d\n", event);
ret = -EINVAL;
}
out:
kfree(runtime);
kfree(params);
return ret;
}
static int snd_soc_dapm_dai_link_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_dapm_widget *w = snd_kcontrol_chip(kcontrol);
struct snd_soc_pcm_runtime *rtd = w->priv;
ucontrol->value.enumerated.item[0] = rtd->params_select;
return 0;
}
static int snd_soc_dapm_dai_link_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_dapm_widget *w = snd_kcontrol_chip(kcontrol);
struct snd_soc_pcm_runtime *rtd = w->priv;
/* Can't change the config when widget is already powered */
if (w->power)
return -EBUSY;
if (ucontrol->value.enumerated.item[0] == rtd->params_select)
return 0;
if (ucontrol->value.enumerated.item[0] >= rtd->dai_link->num_params)
return -EINVAL;
rtd->params_select = ucontrol->value.enumerated.item[0];
return 0;
}
static void
snd_soc_dapm_free_kcontrol(struct snd_soc_card *card,
unsigned long *private_value,
int num_params,
const char **w_param_text)
{
int count;
devm_kfree(card->dev, (void *)*private_value);
for (count = 0 ; count < num_params; count++)
devm_kfree(card->dev, (void *)w_param_text[count]);
devm_kfree(card->dev, w_param_text);
}
static struct snd_kcontrol_new *
snd_soc_dapm_alloc_kcontrol(struct snd_soc_card *card,
char *link_name,
const struct snd_soc_pcm_stream *params,
int num_params, const char **w_param_text,
unsigned long *private_value)
{
struct soc_enum w_param_enum[] = {
SOC_ENUM_SINGLE(0, 0, 0, NULL),
};
struct snd_kcontrol_new kcontrol_dai_link[] = {
SOC_ENUM_EXT(NULL, w_param_enum[0],
snd_soc_dapm_dai_link_get,
snd_soc_dapm_dai_link_put),
};
struct snd_kcontrol_new *kcontrol_news;
const struct snd_soc_pcm_stream *config = params;
int count;
for (count = 0 ; count < num_params; count++) {
if (!config->stream_name) {
dev_warn(card->dapm.dev,
"ASoC: anonymous config %d for dai link %s\n",
count, link_name);
w_param_text[count] =
devm_kasprintf(card->dev, GFP_KERNEL,
"Anonymous Configuration %d",
count);
} else {
w_param_text[count] = devm_kmemdup(card->dev,
config->stream_name,
strlen(config->stream_name) + 1,
GFP_KERNEL);
}
if (!w_param_text[count])
goto outfree_w_param;
config++;
}
w_param_enum[0].items = num_params;
w_param_enum[0].texts = w_param_text;
*private_value =
(unsigned long) devm_kmemdup(card->dev,
(void *)(kcontrol_dai_link[0].private_value),
sizeof(struct soc_enum), GFP_KERNEL);
if (!*private_value) {
dev_err(card->dev, "ASoC: Failed to create control for %s widget\n",
link_name);
goto outfree_w_param;
}
kcontrol_dai_link[0].private_value = *private_value;
/* duplicate kcontrol_dai_link on heap so that memory persists */
kcontrol_news = devm_kmemdup(card->dev, &kcontrol_dai_link[0],
sizeof(struct snd_kcontrol_new),
GFP_KERNEL);
if (!kcontrol_news) {
dev_err(card->dev, "ASoC: Failed to create control for %s widget\n",
link_name);
goto outfree_w_param;
}
return kcontrol_news;
outfree_w_param:
snd_soc_dapm_free_kcontrol(card, private_value, num_params, w_param_text);
return NULL;
}
static struct snd_soc_dapm_widget *
snd_soc_dapm_new_dai(struct snd_soc_card *card, struct snd_soc_pcm_runtime *rtd,
struct snd_soc_dapm_widget *source,
struct snd_soc_dapm_widget *sink)
{
struct snd_soc_dapm_widget template;
struct snd_soc_dapm_widget *w;
const char **w_param_text;
unsigned long private_value;
char *link_name;
int ret;
link_name = devm_kasprintf(card->dev, GFP_KERNEL, "%s-%s",
source->name, sink->name);
if (!link_name)
return ERR_PTR(-ENOMEM);
memset(&template, 0, sizeof(template));
template.reg = SND_SOC_NOPM;
template.id = snd_soc_dapm_dai_link;
template.name = link_name;
template.event = snd_soc_dai_link_event;
template.event_flags = SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
SND_SOC_DAPM_PRE_PMD;
template.kcontrol_news = NULL;
/* allocate memory for control, only in case of multiple configs */
if (rtd->dai_link->num_params > 1) {
w_param_text = devm_kcalloc(card->dev,
rtd->dai_link->num_params,
sizeof(char *), GFP_KERNEL);
if (!w_param_text) {
ret = -ENOMEM;
goto param_fail;
}
template.num_kcontrols = 1;
template.kcontrol_news =
snd_soc_dapm_alloc_kcontrol(card,
link_name,
rtd->dai_link->params,
rtd->dai_link->num_params,
w_param_text, &private_value);
if (!template.kcontrol_news) {
ret = -ENOMEM;
goto param_fail;
}
} else {
w_param_text = NULL;
}
dev_dbg(card->dev, "ASoC: adding %s widget\n", link_name);
w = snd_soc_dapm_new_control_unlocked(&card->dapm, &template);
if (IS_ERR(w)) {
ret = PTR_ERR(w);
goto outfree_kcontrol_news;
}
w->priv = rtd;
return w;
outfree_kcontrol_news:
devm_kfree(card->dev, (void *)template.kcontrol_news);
snd_soc_dapm_free_kcontrol(card, &private_value,
rtd->dai_link->num_params, w_param_text);
param_fail:
devm_kfree(card->dev, link_name);
return ERR_PTR(ret);
}
int snd_soc_dapm_new_dai_widgets(struct snd_soc_dapm_context *dapm,
struct snd_soc_dai *dai)
{
struct snd_soc_dapm_widget template;
struct snd_soc_dapm_widget *w;
WARN_ON(dapm->dev != dai->dev);
memset(&template, 0, sizeof(template));
template.reg = SND_SOC_NOPM;
if (dai->driver->playback.stream_name) {
template.id = snd_soc_dapm_dai_in;
template.name = dai->driver->playback.stream_name;
template.sname = dai->driver->playback.stream_name;
dev_dbg(dai->dev, "ASoC: adding %s widget\n",
template.name);
w = snd_soc_dapm_new_control_unlocked(dapm, &template);
if (IS_ERR(w))
return PTR_ERR(w);
w->priv = dai;
dai->playback_widget = w;
}
if (dai->driver->capture.stream_name) {
template.id = snd_soc_dapm_dai_out;
template.name = dai->driver->capture.stream_name;
template.sname = dai->driver->capture.stream_name;
dev_dbg(dai->dev, "ASoC: adding %s widget\n",
template.name);
w = snd_soc_dapm_new_control_unlocked(dapm, &template);
if (IS_ERR(w))
return PTR_ERR(w);
w->priv = dai;
dai->capture_widget = w;
}
return 0;
}
int snd_soc_dapm_link_dai_widgets(struct snd_soc_card *card)
{
struct snd_soc_dapm_widget *dai_w, *w;
struct snd_soc_dapm_widget *src, *sink;
struct snd_soc_dai *dai;
/* For each DAI widget... */
list_for_each_entry(dai_w, &card->widgets, list) {
switch (dai_w->id) {
case snd_soc_dapm_dai_in:
case snd_soc_dapm_dai_out:
break;
default:
continue;
}
/* let users know there is no DAI to link */
if (!dai_w->priv) {
dev_dbg(card->dev, "dai widget %s has no DAI\n",
dai_w->name);
continue;
}
dai = dai_w->priv;
/* ...find all widgets with the same stream and link them */
list_for_each_entry(w, &card->widgets, list) {
if (w->dapm != dai_w->dapm)
continue;
switch (w->id) {
case snd_soc_dapm_dai_in:
case snd_soc_dapm_dai_out:
continue;
default:
break;
}
if (!w->sname || !strstr(w->sname, dai_w->sname))
continue;
if (dai_w->id == snd_soc_dapm_dai_in) {
src = dai_w;
sink = w;
} else {
src = w;
sink = dai_w;
}
dev_dbg(dai->dev, "%s -> %s\n", src->name, sink->name);
snd_soc_dapm_add_path(w->dapm, src, sink, NULL, NULL);
}
}
return 0;
}
static void dapm_connect_dai_link_widgets(struct snd_soc_card *card,
struct snd_soc_pcm_runtime *rtd)
{
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct snd_soc_dai *codec_dai;
struct snd_soc_dapm_widget *playback = NULL, *capture = NULL;
struct snd_soc_dapm_widget *codec, *playback_cpu, *capture_cpu;
int i;
if (rtd->dai_link->params) {
playback_cpu = cpu_dai->capture_widget;
capture_cpu = cpu_dai->playback_widget;
} else {
playback = cpu_dai->playback_widget;
capture = cpu_dai->capture_widget;
playback_cpu = playback;
capture_cpu = capture;
}
for_each_rtd_codec_dai(rtd, i, codec_dai) {
/* connect BE DAI playback if widgets are valid */
codec = codec_dai->playback_widget;
if (playback_cpu && codec) {
if (!playback) {
playback = snd_soc_dapm_new_dai(card, rtd,
playback_cpu,
codec);
if (IS_ERR(playback)) {
dev_err(rtd->dev,
"ASoC: Failed to create DAI %s: %ld\n",
codec_dai->name,
PTR_ERR(playback));
continue;
}
snd_soc_dapm_add_path(&card->dapm, playback_cpu,
playback, NULL, NULL);
}
dev_dbg(rtd->dev, "connected DAI link %s:%s -> %s:%s\n",
cpu_dai->component->name, playback_cpu->name,
codec_dai->component->name, codec->name);
snd_soc_dapm_add_path(&card->dapm, playback, codec,
NULL, NULL);
}
}
for_each_rtd_codec_dai(rtd, i, codec_dai) {
/* connect BE DAI capture if widgets are valid */
codec = codec_dai->capture_widget;
if (codec && capture_cpu) {
if (!capture) {
capture = snd_soc_dapm_new_dai(card, rtd,
codec,
capture_cpu);
if (IS_ERR(capture)) {
dev_err(rtd->dev,
"ASoC: Failed to create DAI %s: %ld\n",
codec_dai->name,
PTR_ERR(capture));
continue;
}
snd_soc_dapm_add_path(&card->dapm, capture,
capture_cpu, NULL, NULL);
}
dev_dbg(rtd->dev, "connected DAI link %s:%s -> %s:%s\n",
codec_dai->component->name, codec->name,
cpu_dai->component->name, capture_cpu->name);
snd_soc_dapm_add_path(&card->dapm, codec, capture,
NULL, NULL);
}
}
}
static void soc_dapm_dai_stream_event(struct snd_soc_dai *dai, int stream,
int event)
{
struct snd_soc_dapm_widget *w;
unsigned int ep;
if (stream == SNDRV_PCM_STREAM_PLAYBACK)
w = dai->playback_widget;
else
w = dai->capture_widget;
if (w) {
dapm_mark_dirty(w, "stream event");
if (w->id == snd_soc_dapm_dai_in) {
ep = SND_SOC_DAPM_EP_SOURCE;
dapm_widget_invalidate_input_paths(w);
} else {
ep = SND_SOC_DAPM_EP_SINK;
dapm_widget_invalidate_output_paths(w);
}
switch (event) {
case SND_SOC_DAPM_STREAM_START:
w->active = 1;
w->is_ep = ep;
break;
case SND_SOC_DAPM_STREAM_STOP:
w->active = 0;
w->is_ep = 0;
break;
case SND_SOC_DAPM_STREAM_SUSPEND:
case SND_SOC_DAPM_STREAM_RESUME:
case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
break;
}
}
}
void snd_soc_dapm_connect_dai_link_widgets(struct snd_soc_card *card)
{
struct snd_soc_pcm_runtime *rtd;
/* for each BE DAI link... */
for_each_card_rtds(card, rtd) {
/*
* dynamic FE links have no fixed DAI mapping.
* CODEC<->CODEC links have no direct connection.
*/
if (rtd->dai_link->dynamic)
continue;
dapm_connect_dai_link_widgets(card, rtd);
}
}
static void soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
int event)
{
struct snd_soc_dai *codec_dai;
int i;
soc_dapm_dai_stream_event(rtd->cpu_dai, stream, event);
for_each_rtd_codec_dai(rtd, i, codec_dai)
soc_dapm_dai_stream_event(codec_dai, stream, event);
dapm_power_widgets(rtd->card, event);
}
/**
* snd_soc_dapm_stream_event - send a stream event to the dapm core
* @rtd: PCM runtime data
* @stream: stream name
* @event: stream event
*
* Sends a stream event to the dapm core. The core then makes any
* necessary widget power changes.
*
* Returns 0 for success else error.
*/
void snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
int event)
{
struct snd_soc_card *card = rtd->card;
mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
soc_dapm_stream_event(rtd, stream, event);
mutex_unlock(&card->dapm_mutex);
}
/**
* snd_soc_dapm_enable_pin_unlocked - enable pin.
* @dapm: DAPM context
* @pin: pin name
*
* Enables input/output pin and its parents or children widgets iff there is
* a valid audio route and active audio stream.
*
* Requires external locking.
*
* NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
* do any widget power switching.
*/
int snd_soc_dapm_enable_pin_unlocked(struct snd_soc_dapm_context *dapm,
const char *pin)
{
return snd_soc_dapm_set_pin(dapm, pin, 1);
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin_unlocked);
/**
* snd_soc_dapm_enable_pin - enable pin.
* @dapm: DAPM context
* @pin: pin name
*
* Enables input/output pin and its parents or children widgets iff there is
* a valid audio route and active audio stream.
*
* NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
* do any widget power switching.
*/
int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
{
int ret;
mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
ret = snd_soc_dapm_set_pin(dapm, pin, 1);
mutex_unlock(&dapm->card->dapm_mutex);
return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
/**
* snd_soc_dapm_force_enable_pin_unlocked - force a pin to be enabled
* @dapm: DAPM context
* @pin: pin name
*
* Enables input/output pin regardless of any other state. This is
* intended for use with microphone bias supplies used in microphone
* jack detection.
*
* Requires external locking.
*
* NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
* do any widget power switching.
*/
int snd_soc_dapm_force_enable_pin_unlocked(struct snd_soc_dapm_context *dapm,
const char *pin)
{
struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
if (!w) {
dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
return -EINVAL;
}
dev_dbg(w->dapm->dev, "ASoC: force enable pin %s\n", pin);
if (!w->connected) {
/*
* w->force does not affect the number of input or output paths,
* so we only have to recheck if w->connected is changed
*/
dapm_widget_invalidate_input_paths(w);
dapm_widget_invalidate_output_paths(w);
w->connected = 1;
}
w->force = 1;
dapm_mark_dirty(w, "force enable");
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin_unlocked);
/**
* snd_soc_dapm_force_enable_pin - force a pin to be enabled
* @dapm: DAPM context
* @pin: pin name
*
* Enables input/output pin regardless of any other state. This is
* intended for use with microphone bias supplies used in microphone
* jack detection.
*
* NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
* do any widget power switching.
*/
int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
const char *pin)
{
int ret;
mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
ret = snd_soc_dapm_force_enable_pin_unlocked(dapm, pin);
mutex_unlock(&dapm->card->dapm_mutex);
return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
/**
* snd_soc_dapm_disable_pin_unlocked - disable pin.
* @dapm: DAPM context
* @pin: pin name
*
* Disables input/output pin and its parents or children widgets.
*
* Requires external locking.
*
* NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
* do any widget power switching.
*/
int snd_soc_dapm_disable_pin_unlocked(struct snd_soc_dapm_context *dapm,
const char *pin)
{
return snd_soc_dapm_set_pin(dapm, pin, 0);
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin_unlocked);
/**
* snd_soc_dapm_disable_pin - disable pin.
* @dapm: DAPM context
* @pin: pin name
*
* Disables input/output pin and its parents or children widgets.
*
* NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
* do any widget power switching.
*/
int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
const char *pin)
{
int ret;
mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
ret = snd_soc_dapm_set_pin(dapm, pin, 0);
mutex_unlock(&dapm->card->dapm_mutex);
return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
/**
* snd_soc_dapm_nc_pin_unlocked - permanently disable pin.
* @dapm: DAPM context
* @pin: pin name
*
* Marks the specified pin as being not connected, disabling it along
* any parent or child widgets. At present this is identical to
* snd_soc_dapm_disable_pin() but in future it will be extended to do
* additional things such as disabling controls which only affect
* paths through the pin.
*
* Requires external locking.
*
* NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
* do any widget power switching.
*/
int snd_soc_dapm_nc_pin_unlocked(struct snd_soc_dapm_context *dapm,
const char *pin)
{
return snd_soc_dapm_set_pin(dapm, pin, 0);
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin_unlocked);
/**
* snd_soc_dapm_nc_pin - permanently disable pin.
* @dapm: DAPM context
* @pin: pin name
*
* Marks the specified pin as being not connected, disabling it along
* any parent or child widgets. At present this is identical to
* snd_soc_dapm_disable_pin() but in future it will be extended to do
* additional things such as disabling controls which only affect
* paths through the pin.
*
* NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
* do any widget power switching.
*/
int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
{
int ret;
mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
ret = snd_soc_dapm_set_pin(dapm, pin, 0);
mutex_unlock(&dapm->card->dapm_mutex);
return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
/**
* snd_soc_dapm_get_pin_status - get audio pin status
* @dapm: DAPM context
* @pin: audio signal pin endpoint (or start point)
*
* Get audio pin status - connected or disconnected.
*
* Returns 1 for connected otherwise 0.
*/
int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
const char *pin)
{
struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
if (w)
return w->connected;
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
/**
* snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
* @dapm: DAPM context
* @pin: audio signal pin endpoint (or start point)
*
* Mark the given endpoint or pin as ignoring suspend. When the
* system is disabled a path between two endpoints flagged as ignoring
* suspend will not be disabled. The path must already be enabled via
* normal means at suspend time, it will not be turned on if it was not
* already enabled.
*/
int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
const char *pin)
{
struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
if (!w) {
dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
return -EINVAL;
}
w->ignore_suspend = 1;
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
/**
* snd_soc_dapm_free - free dapm resources
* @dapm: DAPM context
*
* Free all dapm widgets and resources.
*/
void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
{
dapm_debugfs_cleanup(dapm);
dapm_free_widgets(dapm);
list_del(&dapm->list);
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
static void soc_dapm_shutdown_dapm(struct snd_soc_dapm_context *dapm)
{
struct snd_soc_card *card = dapm->card;
struct snd_soc_dapm_widget *w;
LIST_HEAD(down_list);
int powerdown = 0;
mutex_lock(&card->dapm_mutex);
list_for_each_entry(w, &dapm->card->widgets, list) {
if (w->dapm != dapm)
continue;
if (w->power) {
dapm_seq_insert(w, &down_list, false);
w->power = 0;
powerdown = 1;
}
}
/* If there were no widgets to power down we're already in
* standby.
*/
if (powerdown) {
if (dapm->bias_level == SND_SOC_BIAS_ON)
snd_soc_dapm_set_bias_level(dapm,
SND_SOC_BIAS_PREPARE);
dapm_seq_run(card, &down_list, 0, false);
if (dapm->bias_level == SND_SOC_BIAS_PREPARE)
snd_soc_dapm_set_bias_level(dapm,
SND_SOC_BIAS_STANDBY);
}
mutex_unlock(&card->dapm_mutex);
}
/*
* snd_soc_dapm_shutdown - callback for system shutdown
*/
void snd_soc_dapm_shutdown(struct snd_soc_card *card)
{
struct snd_soc_dapm_context *dapm;
list_for_each_entry(dapm, &card->dapm_list, list) {
if (dapm != &card->dapm) {
soc_dapm_shutdown_dapm(dapm);
if (dapm->bias_level == SND_SOC_BIAS_STANDBY)
snd_soc_dapm_set_bias_level(dapm,
SND_SOC_BIAS_OFF);
}
}
soc_dapm_shutdown_dapm(&card->dapm);
if (card->dapm.bias_level == SND_SOC_BIAS_STANDBY)
snd_soc_dapm_set_bias_level(&card->dapm,
SND_SOC_BIAS_OFF);
}
/* Module information */
MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
MODULE_LICENSE("GPL");
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