[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/sound/soc/soc-dapm.c b/src/kernel/linux/v4.14/sound/soc/soc-dapm.c
new file mode 100644
index 0000000..c42ee8e
--- /dev/null
+++ b/src/kernel/linux/v4.14/sound/soc/soc-dapm.c
@@ -0,0 +1,4550 @@
+/*
+ * soc-dapm.c -- ALSA SoC Dynamic Audio Power Management
+ *
+ * Copyright 2005 Wolfson Microelectronics PLC.
+ * Author: Liam Girdwood <lrg@slimlogic.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * Features:
+ * o Changes power status of internal codec blocks depending on the
+ * dynamic configuration of codec internal audio paths and active
+ * DACs/ADCs.
+ * o Platform power domain - can support external components i.e. amps and
+ * mic/headphone insertion events.
+ * o Automatic Mic Bias support
+ * o Jack insertion power event initiation - e.g. hp insertion will enable
+ * sinks, dacs, etc
+ * o Delayed power down of audio subsystem to reduce pops between a quick
+ * device reopen.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/async.h>
+#include <linux/delay.h>
+#include <linux/pm.h>
+#include <linux/bitops.h>
+#include <linux/platform_device.h>
+#include <linux/jiffies.h>
+#include <linux/debugfs.h>
+#include <linux/pm_runtime.h>
+#include <linux/regulator/consumer.h>
+#include <linux/clk.h>
+#include <linux/slab.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/initval.h>
+
+#include <trace/events/asoc.h>
+
+#define DAPM_UPDATE_STAT(widget, val) widget->dapm->card->dapm_stats.val++;
+
+#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_clock_supply] = 1,
+ [snd_soc_dapm_supply] = 2,
+ [snd_soc_dapm_micbias] = 3,
+ [snd_soc_dapm_vmid] = 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_siggen] = 5,
+ [snd_soc_dapm_input] = 5,
+ [snd_soc_dapm_output] = 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_buffer] = 9,
+ [snd_soc_dapm_scheduler] = 9,
+ [snd_soc_dapm_effect] = 9,
+ [snd_soc_dapm_src] = 9,
+ [snd_soc_dapm_asrc] = 9,
+ [snd_soc_dapm_encoder] = 9,
+ [snd_soc_dapm_decoder] = 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_sink] = 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_sink] = 3,
+ [snd_soc_dapm_pga] = 4,
+ [snd_soc_dapm_buffer] = 4,
+ [snd_soc_dapm_scheduler] = 4,
+ [snd_soc_dapm_effect] = 4,
+ [snd_soc_dapm_src] = 4,
+ [snd_soc_dapm_asrc] = 4,
+ [snd_soc_dapm_encoder] = 4,
+ [snd_soc_dapm_decoder] = 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_siggen] = 7,
+ [snd_soc_dapm_input] = 7,
+ [snd_soc_dapm_output] = 7,
+ [snd_soc_dapm_micbias] = 8,
+ [snd_soc_dapm_vmid] = 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_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;
+ }
+ if (!data->widget) {
+ ret = -ENOMEM;
+ 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;
+ 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;
+ }
+ if (!data->widget) {
+ ret = -ENOMEM;
+ 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) {
+ switch (dapm_kcontrol_get_wlist(kcontrol)->widgets[0]->id) {
+ case snd_soc_dapm_switch:
+ case snd_soc_dapm_mixer:
+ case snd_soc_dapm_mixer_named_ctl:
+ data->widget->on_val = value & data->widget->mask;
+ break;
+ case snd_soc_dapm_demux:
+ case snd_soc_dapm_mux:
+ data->widget->on_val = value >> data->widget->shift;
+ break;
+ default:
+ data->widget->on_val = value;
+ break;
+ }
+ }
+
+ 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;
+ }
+
+ for (i = 0; i < e->items; i++) {
+ if (!(strcmp(control_name, e->texts[i]))) {
+ path->name = e->texts[i];
+ if (i == item)
+ path->connect = 1;
+ else
+ path->connect = 0;
+ return 0;
+ }
+ }
+
+ return -ENODEV;
+}
+
+/* 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 {
+ /* since a virtual mixer has no backing registers to
+ * decide which path to connect, it will try to match
+ * with initial state. This is to ensure
+ * that the default mixer choice will be
+ * correctly powered up during initialization.
+ */
+ p->connect = invert;
+ }
+}
+
+/* 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;
+
+ /* create control for links with > 1 config */
+ if (w->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(sizeof(**list) + size * sizeof(*w), 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)) {
+ list = NULL;
+ custom_stop_condition = NULL;
+ }
+
+ 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 widgets from that point
+ * in the graph onwards should not be added to the widget list.
+ */
+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 clock supply widget.
+ */
+int dapm_clock_event(struct snd_soc_dapm_widget *w,
+ struct snd_kcontrol *kcontrol, int event)
+{
+ if (!w->clk)
+ return -EIO;
+
+ soc_dapm_async_complete(w->dapm);
+
+#ifdef CONFIG_HAVE_CLK
+ if (SND_SOC_DAPM_EVENT_ON(event)) {
+ return clk_prepare_enable(w->clk);
+ } else {
+ clk_disable_unprepare(w->clk);
+ return 0;
+ }
+#endif
+ return 0;
+}
+EXPORT_SYMBOL_GPL(dapm_clock_event);
+
+static int dapm_widget_power_check(struct snd_soc_dapm_widget *w)
+{
+ if (w->power_checked)
+ return w->new_power;
+
+ if (w->force)
+ w->new_power = 1;
+ else
+ w->new_power = w->power_check(w);
+
+ w->power_checked = true;
+
+ return w->new_power;
+}
+
+/* Generic check to see if a widget should be powered. */
+static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
+{
+ int in, out;
+
+ DAPM_UPDATE_STAT(w, power_checks);
+
+ in = is_connected_input_ep(w, NULL, 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_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)
+ 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)
+ 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(w, p->node[rdir]))
+ 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 || IS_ERR(parent))
+ return;
+
+ dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
+
+ if (IS_ERR(dapm->debugfs_dapm)) {
+ dev_warn(dapm->dev,
+ "ASoC: Failed to create DAPM debugfs directory %ld\n",
+ PTR_ERR(dapm->debugfs_dapm));
+ return;
+ }
+
+ d = debugfs_create_file("bias_level", 0444,
+ dapm->debugfs_dapm, dapm,
+ &dapm_bias_fops);
+ if (IS_ERR(d))
+ dev_warn(dapm->dev,
+ "ASoC: Failed to create bias level debugfs file: %ld\n",
+ PTR_ERR(d));
+}
+
+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 (IS_ERR(d))
+ dev_warn(w->dapm->dev,
+ "ASoC: Failed to create %s debugfs file: %ld\n",
+ w->name, PTR_ERR(d));
+}
+
+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_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);
+ int i, count = 0;
+
+ mutex_lock(&rtd->card->dapm_mutex);
+
+ for (i = 0; i < rtd->num_codecs; i++) {
+ struct snd_soc_component *cmpnt = rtd->codec_dais[i]->component;
+
+ count += dapm_widget_show_component(cmpnt, buf + count);
+ }
+
+ mutex_unlock(&rtd->card->dapm_mutex);
+
+ return count;
+}
+
+static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
+
+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_INIT);
+ 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_INIT);
+ 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 = kzalloc(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, ®_val);
+ val = (reg_val >> shift) & mask;
+
+ if (ret == 0 && reg != mc->rreg)
+ ret = soc_dapm_read(dapm, mc->rreg, ®_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 = { NULL };
+ 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, ®_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 = { NULL };
+ 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(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);
+ /* Do not nag about probe deferrals */
+ if (IS_ERR(w)) {
+ int ret = PTR_ERR(w);
+
+ if (ret != -EPROBE_DEFER)
+ dev_err(dapm->dev,
+ "ASoC: Failed to create DAPM control %s (%d)\n",
+ widget->name, ret);
+ goto out_unlock;
+ }
+ if (!w)
+ dev_err(dapm->dev,
+ "ASoC: Failed to create DAPM control %s\n",
+ widget->name);
+
+out_unlock:
+ mutex_unlock(&dapm->card->dapm_mutex);
+ return w;
+}
+EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
+
+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 NULL;
+
+ 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);
+ if (ret == -EPROBE_DEFER)
+ return ERR_PTR(ret);
+ dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n",
+ w->name, ret);
+ return NULL;
+ }
+
+ 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);
+ }
+ break;
+ case snd_soc_dapm_clock_supply:
+#ifdef CONFIG_CLKDEV_LOOKUP
+ w->clk = devm_clk_get(dapm->dev, w->name);
+ if (IS_ERR(w->clk)) {
+ ret = PTR_ERR(w->clk);
+ if (ret == -EPROBE_DEFER)
+ return ERR_PTR(ret);
+ dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n",
+ w->name, ret);
+ return NULL;
+ }
+#else
+ return NULL;
+#endif
+ 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 NULL;
+ }
+
+ 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_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;
+}
+
+/**
+ * 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);
+ /* Do not nag about probe deferrals */
+ if (ret == -EPROBE_DEFER)
+ break;
+ dev_err(dapm->dev,
+ "ASoC: Failed to create DAPM control %s (%d)\n",
+ widget->name, ret);
+ break;
+ }
+ if (!w) {
+ dev_err(dapm->dev,
+ "ASoC: Failed to create DAPM control %s\n",
+ widget->name);
+ ret = -ENOMEM;
+ 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 *source_p, *sink_p;
+ struct snd_soc_dai *source, *sink;
+ const struct snd_soc_pcm_stream *config = w->params + w->params_select;
+ struct snd_pcm_substream substream;
+ struct snd_pcm_hw_params *params = NULL;
+ struct snd_pcm_runtime *runtime = NULL;
+ u64 fmt;
+ int ret;
+
+ 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;
+
+ /* We only support a single source and sink, pick the first */
+ source_p = list_first_entry(&w->edges[SND_SOC_DAPM_DIR_OUT],
+ struct snd_soc_dapm_path,
+ list_node[SND_SOC_DAPM_DIR_OUT]);
+ sink_p = list_first_entry(&w->edges[SND_SOC_DAPM_DIR_IN],
+ struct snd_soc_dapm_path,
+ list_node[SND_SOC_DAPM_DIR_IN]);
+
+ source = source_p->source->priv;
+ sink = sink_p->sink->priv;
+
+ /* 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;
+
+ switch (event) {
+ case SND_SOC_DAPM_PRE_PMU:
+ substream.stream = SNDRV_PCM_STREAM_CAPTURE;
+ if (source->driver->ops && 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;
+ if (sink->driver->ops && 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:
+ 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:
+ 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;
+
+ source->active--;
+ if (source->driver->ops && source->driver->ops->shutdown) {
+ substream.stream = SNDRV_PCM_STREAM_CAPTURE;
+ source->driver->ops->shutdown(&substream, source);
+ }
+
+ sink->active--;
+ if (sink->driver->ops && sink->driver->ops->shutdown) {
+ substream.stream = SNDRV_PCM_STREAM_PLAYBACK;
+ 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);
+
+ ucontrol->value.enumerated.item[0] = w->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);
+
+ /* Can't change the config when widget is already powered */
+ if (w->power)
+ return -EBUSY;
+
+ if (ucontrol->value.enumerated.item[0] == w->params_select)
+ return 0;
+
+ if (ucontrol->value.enumerated.item[0] >= w->num_params)
+ return -EINVAL;
+
+ w->params_select = ucontrol->value.enumerated.item[0];
+
+ return 0;
+}
+
+int snd_soc_dapm_new_pcm(struct snd_soc_card *card,
+ const struct snd_soc_pcm_stream *params,
+ unsigned int num_params,
+ struct snd_soc_dapm_widget *source,
+ struct snd_soc_dapm_widget *sink)
+{
+ struct snd_soc_dapm_widget template;
+ struct snd_soc_dapm_widget *w;
+ char *link_name;
+ int ret, count;
+ unsigned long private_value;
+ const char **w_param_text;
+ 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),
+ };
+ const struct snd_soc_pcm_stream *config = params;
+
+ w_param_text = devm_kcalloc(card->dev, num_params,
+ sizeof(char *), GFP_KERNEL);
+ if (!w_param_text)
+ return -ENOMEM;
+
+ link_name = devm_kasprintf(card->dev, GFP_KERNEL, "%s-%s",
+ source->name, sink->name);
+ if (!link_name) {
+ ret = -ENOMEM;
+ goto outfree_w_param;
+ }
+
+ 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);
+ if (!w_param_text[count]) {
+ ret = -ENOMEM;
+ goto outfree_link_name;
+ }
+ } else {
+ w_param_text[count] = devm_kmemdup(card->dev,
+ config->stream_name,
+ strlen(config->stream_name) + 1,
+ GFP_KERNEL);
+ if (!w_param_text[count]) {
+ ret = -ENOMEM;
+ goto outfree_link_name;
+ }
+ }
+ config++;
+ }
+ w_param_enum[0].items = num_params;
+ w_param_enum[0].texts = w_param_text;
+
+ 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.num_kcontrols = 1;
+ /* duplicate w_param_enum on heap so that memory persists */
+ 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);
+ ret = -ENOMEM;
+ goto outfree_link_name;
+ }
+ kcontrol_dai_link[0].private_value = private_value;
+ /* duplicate kcontrol_dai_link on heap so that memory persists */
+ template.kcontrol_news =
+ devm_kmemdup(card->dev, &kcontrol_dai_link[0],
+ sizeof(struct snd_kcontrol_new),
+ GFP_KERNEL);
+ if (!template.kcontrol_news) {
+ dev_err(card->dev, "ASoC: Failed to create control for %s widget\n",
+ link_name);
+ ret = -ENOMEM;
+ goto outfree_private_value;
+ }
+
+ 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);
+ /* Do not nag about probe deferrals */
+ if (ret != -EPROBE_DEFER)
+ dev_err(card->dev,
+ "ASoC: Failed to create %s widget (%d)\n",
+ link_name, ret);
+ goto outfree_kcontrol_news;
+ }
+ if (!w) {
+ dev_err(card->dev, "ASoC: Failed to create %s widget\n",
+ link_name);
+ ret = -ENOMEM;
+ goto outfree_kcontrol_news;
+ }
+
+ w->params = params;
+ w->num_params = num_params;
+
+ ret = snd_soc_dapm_add_path(&card->dapm, source, w, NULL, NULL);
+ if (ret)
+ goto outfree_w;
+ return snd_soc_dapm_add_path(&card->dapm, w, sink, NULL, NULL);
+
+outfree_w:
+ devm_kfree(card->dev, w);
+outfree_kcontrol_news:
+ devm_kfree(card->dev, (void *)template.kcontrol_news);
+outfree_private_value:
+ devm_kfree(card->dev, (void *)private_value);
+outfree_link_name:
+ devm_kfree(card->dev, link_name);
+outfree_w_param:
+ for (count = 0 ; count < num_params; count++)
+ devm_kfree(card->dev, (void *)w_param_text[count]);
+ devm_kfree(card->dev, w_param_text);
+
+ return 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)) {
+ int ret = PTR_ERR(w);
+
+ /* Do not nag about probe deferrals */
+ if (ret != -EPROBE_DEFER)
+ dev_err(dapm->dev,
+ "ASoC: Failed to create %s widget (%d)\n",
+ dai->driver->playback.stream_name, ret);
+ return ret;
+ }
+ if (!w) {
+ dev_err(dapm->dev, "ASoC: Failed to create %s widget\n",
+ dai->driver->playback.stream_name);
+ return -ENOMEM;
+ }
+
+ 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)) {
+ int ret = PTR_ERR(w);
+
+ /* Do not nag about probe deferrals */
+ if (ret != -EPROBE_DEFER)
+ dev_err(dapm->dev,
+ "ASoC: Failed to create %s widget (%d)\n",
+ dai->driver->playback.stream_name, ret);
+ return ret;
+ }
+ if (!w) {
+ dev_err(dapm->dev, "ASoC: Failed to create %s widget\n",
+ dai->driver->capture.stream_name);
+ return -ENOMEM;
+ }
+
+ 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_dapm_widget *sink, *source;
+ int i;
+
+ for (i = 0; i < rtd->num_codecs; i++) {
+ struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
+
+ /* connect BE DAI playback if widgets are valid */
+ if (codec_dai->playback_widget && cpu_dai->playback_widget) {
+ source = cpu_dai->playback_widget;
+ sink = codec_dai->playback_widget;
+ dev_dbg(rtd->dev, "connected DAI link %s:%s -> %s:%s\n",
+ cpu_dai->component->name, source->name,
+ codec_dai->component->name, sink->name);
+
+ snd_soc_dapm_add_path(&card->dapm, source, sink,
+ NULL, NULL);
+ }
+
+ /* connect BE DAI capture if widgets are valid */
+ if (codec_dai->capture_widget && cpu_dai->capture_widget) {
+ source = codec_dai->capture_widget;
+ sink = cpu_dai->capture_widget;
+ dev_dbg(rtd->dev, "connected DAI link %s:%s -> %s:%s\n",
+ codec_dai->component->name, source->name,
+ cpu_dai->component->name, sink->name);
+
+ snd_soc_dapm_add_path(&card->dapm, source, sink,
+ 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... */
+ list_for_each_entry(rtd, &card->rtd_list, list) {
+ /*
+ * dynamic FE links have no fixed DAI mapping.
+ * CODEC<->CODEC links have no direct connection.
+ */
+ if (rtd->dai_link->dynamic || rtd->dai_link->params)
+ continue;
+
+ dapm_connect_dai_link_widgets(card, rtd);
+ }
+}
+
+static void soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
+ int event)
+{
+ int i;
+
+ soc_dapm_dai_stream_event(rtd->cpu_dai, stream, event);
+ for (i = 0; i < rtd->num_codecs; i++)
+ soc_dapm_dai_stream_event(rtd->codec_dais[i], 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->new_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");