Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 4888 insertions, 0 deletions

diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c
new file mode 100644
index 000000000..6eb8c6cb5
--- /dev/null
+++ b/sound/soc/soc-dapm.c
@@ -0,0 +1,4888 @@
+// SPDX-License-Identifier: GPL-2.0+
+//
+// soc-dapm.c  --  ALSA SoC Dynamic Audio Power Management
+//
+// Copyright 2005 Wolfson Microelectronics PLC.
+// Author: Liam Girdwood <lrg@slimlogic.co.uk>
+//
+//  Features:
+//    o Changes power status of internal codec blocks depending on the
+//      dynamic configuration of codec internal audio paths and active
+//      DACs/ADCs.
+//    o Platform power domain - can support external components i.e. amps and
+//      mic/headphone insertion events.
+//    o Automatic Mic Bias support
+//    o Jack insertion power event initiation - e.g. hp insertion will enable
+//      sinks, dacs, etc
+//    o Delayed power down of audio subsystem to reduce pops between a quick
+//      device reopen.
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/async.h>
+#include <linux/delay.h>
+#include <linux/pm.h>
+#include <linux/bitops.h>
+#include <linux/platform_device.h>
+#include <linux/jiffies.h>
+#include <linux/debugfs.h>
+#include <linux/pm_runtime.h>
+#include <linux/regulator/consumer.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/clk.h>
+#include <linux/slab.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/initval.h>
+
+#include <trace/events/asoc.h>
+
+#define DAPM_UPDATE_STAT(widget, val) widget->dapm->card->dapm_stats.val++;
+
+#define SND_SOC_DAPM_DIR_REVERSE(x) ((x == SND_SOC_DAPM_DIR_IN) ? \
+	SND_SOC_DAPM_DIR_OUT : SND_SOC_DAPM_DIR_IN)
+
+#define snd_soc_dapm_for_each_direction(dir) \
+	for ((dir) = SND_SOC_DAPM_DIR_IN; (dir) <= SND_SOC_DAPM_DIR_OUT; \
+		(dir)++)
+
+static int snd_soc_dapm_add_path(struct snd_soc_dapm_context *dapm,
+	struct snd_soc_dapm_widget *wsource, struct snd_soc_dapm_widget *wsink,
+	const char *control,
+	int (*connected)(struct snd_soc_dapm_widget *source,
+			 struct snd_soc_dapm_widget *sink));
+
+struct snd_soc_dapm_widget *
+snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
+			 const struct snd_soc_dapm_widget *widget);
+
+struct snd_soc_dapm_widget *
+snd_soc_dapm_new_control_unlocked(struct snd_soc_dapm_context *dapm,
+			 const struct snd_soc_dapm_widget *widget);
+
+static unsigned int soc_dapm_read(struct snd_soc_dapm_context *dapm, int reg);
+
+/* dapm power sequences - make this per codec in the future */
+static int dapm_up_seq[] = {
+	[snd_soc_dapm_pre] = 1,
+	[snd_soc_dapm_regulator_supply] = 2,
+	[snd_soc_dapm_pinctrl] = 2,
+	[snd_soc_dapm_clock_supply] = 2,
+	[snd_soc_dapm_supply] = 3,
+	[snd_soc_dapm_micbias] = 4,
+	[snd_soc_dapm_vmid] = 4,
+	[snd_soc_dapm_dai_link] = 3,
+	[snd_soc_dapm_dai_in] = 5,
+	[snd_soc_dapm_dai_out] = 5,
+	[snd_soc_dapm_aif_in] = 5,
+	[snd_soc_dapm_aif_out] = 5,
+	[snd_soc_dapm_mic] = 6,
+	[snd_soc_dapm_siggen] = 6,
+	[snd_soc_dapm_input] = 6,
+	[snd_soc_dapm_output] = 6,
+	[snd_soc_dapm_mux] = 7,
+	[snd_soc_dapm_demux] = 7,
+	[snd_soc_dapm_dac] = 8,
+	[snd_soc_dapm_switch] = 9,
+	[snd_soc_dapm_mixer] = 9,
+	[snd_soc_dapm_mixer_named_ctl] = 9,
+	[snd_soc_dapm_pga] = 10,
+	[snd_soc_dapm_buffer] = 10,
+	[snd_soc_dapm_scheduler] = 10,
+	[snd_soc_dapm_effect] = 10,
+	[snd_soc_dapm_src] = 10,
+	[snd_soc_dapm_asrc] = 10,
+	[snd_soc_dapm_encoder] = 10,
+	[snd_soc_dapm_decoder] = 10,
+	[snd_soc_dapm_adc] = 11,
+	[snd_soc_dapm_out_drv] = 12,
+	[snd_soc_dapm_hp] = 12,
+	[snd_soc_dapm_spk] = 12,
+	[snd_soc_dapm_line] = 12,
+	[snd_soc_dapm_sink] = 12,
+	[snd_soc_dapm_kcontrol] = 13,
+	[snd_soc_dapm_post] = 14,
+};
+
+static int dapm_down_seq[] = {
+	[snd_soc_dapm_pre] = 1,
+	[snd_soc_dapm_kcontrol] = 2,
+	[snd_soc_dapm_adc] = 3,
+	[snd_soc_dapm_hp] = 4,
+	[snd_soc_dapm_spk] = 4,
+	[snd_soc_dapm_line] = 4,
+	[snd_soc_dapm_out_drv] = 4,
+	[snd_soc_dapm_sink] = 4,
+	[snd_soc_dapm_pga] = 5,
+	[snd_soc_dapm_buffer] = 5,
+	[snd_soc_dapm_scheduler] = 5,
+	[snd_soc_dapm_effect] = 5,
+	[snd_soc_dapm_src] = 5,
+	[snd_soc_dapm_asrc] = 5,
+	[snd_soc_dapm_encoder] = 5,
+	[snd_soc_dapm_decoder] = 5,
+	[snd_soc_dapm_switch] = 6,
+	[snd_soc_dapm_mixer_named_ctl] = 6,
+	[snd_soc_dapm_mixer] = 6,
+	[snd_soc_dapm_dac] = 7,
+	[snd_soc_dapm_mic] = 8,
+	[snd_soc_dapm_siggen] = 8,
+	[snd_soc_dapm_input] = 8,
+	[snd_soc_dapm_output] = 8,
+	[snd_soc_dapm_micbias] = 9,
+	[snd_soc_dapm_vmid] = 9,
+	[snd_soc_dapm_mux] = 10,
+	[snd_soc_dapm_demux] = 10,
+	[snd_soc_dapm_aif_in] = 11,
+	[snd_soc_dapm_aif_out] = 11,
+	[snd_soc_dapm_dai_in] = 11,
+	[snd_soc_dapm_dai_out] = 11,
+	[snd_soc_dapm_dai_link] = 12,
+	[snd_soc_dapm_supply] = 13,
+	[snd_soc_dapm_clock_supply] = 14,
+	[snd_soc_dapm_pinctrl] = 14,
+	[snd_soc_dapm_regulator_supply] = 14,
+	[snd_soc_dapm_post] = 15,
+};
+
+static void dapm_assert_locked(struct snd_soc_dapm_context *dapm)
+{
+	if (dapm->card && dapm->card->instantiated)
+		lockdep_assert_held(&dapm->card->dapm_mutex);
+}
+
+static void pop_wait(u32 pop_time)
+{
+	if (pop_time)
+		schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
+}
+
+__printf(3, 4)
+static void pop_dbg(struct device *dev, u32 pop_time, const char *fmt, ...)
+{
+	va_list args;
+	char *buf;
+
+	if (!pop_time)
+		return;
+
+	buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
+	if (buf == NULL)
+		return;
+
+	va_start(args, fmt);
+	vsnprintf(buf, PAGE_SIZE, fmt, args);
+	dev_info(dev, "%s", buf);
+	va_end(args);
+
+	kfree(buf);
+}
+
+static bool dapm_dirty_widget(struct snd_soc_dapm_widget *w)
+{
+	return !list_empty(&w->dirty);
+}
+
+static void dapm_mark_dirty(struct snd_soc_dapm_widget *w, const char *reason)
+{
+	dapm_assert_locked(w->dapm);
+
+	if (!dapm_dirty_widget(w)) {
+		dev_vdbg(w->dapm->dev, "Marking %s dirty due to %s\n",
+			 w->name, reason);
+		list_add_tail(&w->dirty, &w->dapm->card->dapm_dirty);
+	}
+}
+
+/*
+ * Common implementation for dapm_widget_invalidate_input_paths() and
+ * dapm_widget_invalidate_output_paths(). The function is inlined since the
+ * combined size of the two specialized functions is only marginally larger then
+ * the size of the generic function and at the same time the fast path of the
+ * specialized functions is significantly smaller than the generic function.
+ */
+static __always_inline void dapm_widget_invalidate_paths(
+	struct snd_soc_dapm_widget *w, enum snd_soc_dapm_direction dir)
+{
+	enum snd_soc_dapm_direction rdir = SND_SOC_DAPM_DIR_REVERSE(dir);
+	struct snd_soc_dapm_widget *node;
+	struct snd_soc_dapm_path *p;
+	LIST_HEAD(list);
+
+	dapm_assert_locked(w->dapm);
+
+	if (w->endpoints[dir] == -1)
+		return;
+
+	list_add_tail(&w->work_list, &list);
+	w->endpoints[dir] = -1;
+
+	list_for_each_entry(w, &list, work_list) {
+		snd_soc_dapm_widget_for_each_path(w, dir, p) {
+			if (p->is_supply || p->weak || !p->connect)
+				continue;
+			node = p->node[rdir];
+			if (node->endpoints[dir] != -1) {
+				node->endpoints[dir] = -1;
+				list_add_tail(&node->work_list, &list);
+			}
+		}
+	}
+}
+
+/*
+ * dapm_widget_invalidate_input_paths() - Invalidate the cached number of
+ *  input paths
+ * @w: The widget for which to invalidate the cached number of input paths
+ *
+ * Resets the cached number of inputs for the specified widget and all widgets
+ * that can be reached via outcoming paths from the widget.
+ *
+ * This function must be called if the number of output paths for a widget might
+ * have changed. E.g. if the source state of a widget changes or a path is added
+ * or activated with the widget as the sink.
+ */
+static void dapm_widget_invalidate_input_paths(struct snd_soc_dapm_widget *w)
+{
+	dapm_widget_invalidate_paths(w, SND_SOC_DAPM_DIR_IN);
+}
+
+/*
+ * dapm_widget_invalidate_output_paths() - Invalidate the cached number of
+ *  output paths
+ * @w: The widget for which to invalidate the cached number of output paths
+ *
+ * Resets the cached number of outputs for the specified widget and all widgets
+ * that can be reached via incoming paths from the widget.
+ *
+ * This function must be called if the number of output paths for a widget might
+ * have changed. E.g. if the sink state of a widget changes or a path is added
+ * or activated with the widget as the source.
+ */
+static void dapm_widget_invalidate_output_paths(struct snd_soc_dapm_widget *w)
+{
+	dapm_widget_invalidate_paths(w, SND_SOC_DAPM_DIR_OUT);
+}
+
+/*
+ * dapm_path_invalidate() - Invalidates the cached number of inputs and outputs
+ *  for the widgets connected to a path
+ * @p: The path to invalidate
+ *
+ * Resets the cached number of inputs for the sink of the path and the cached
+ * number of outputs for the source of the path.
+ *
+ * This function must be called when a path is added, removed or the connected
+ * state changes.
+ */
+static void dapm_path_invalidate(struct snd_soc_dapm_path *p)
+{
+	/*
+	 * Weak paths or supply paths do not influence the number of input or
+	 * output paths of their neighbors.
+	 */
+	if (p->weak || p->is_supply)
+		return;
+
+	/*
+	 * The number of connected endpoints is the sum of the number of
+	 * connected endpoints of all neighbors. If a node with 0 connected
+	 * endpoints is either connected or disconnected that sum won't change,
+	 * so there is no need to re-check the path.
+	 */
+	if (p->source->endpoints[SND_SOC_DAPM_DIR_IN] != 0)
+		dapm_widget_invalidate_input_paths(p->sink);
+	if (p->sink->endpoints[SND_SOC_DAPM_DIR_OUT] != 0)
+		dapm_widget_invalidate_output_paths(p->source);
+}
+
+void dapm_mark_endpoints_dirty(struct snd_soc_card *card)
+{
+	struct snd_soc_dapm_widget *w;
+
+	mutex_lock(&card->dapm_mutex);
+
+	for_each_card_widgets(card, w) {
+		if (w->is_ep) {
+			dapm_mark_dirty(w, "Rechecking endpoints");
+			if (w->is_ep & SND_SOC_DAPM_EP_SINK)
+				dapm_widget_invalidate_output_paths(w);
+			if (w->is_ep & SND_SOC_DAPM_EP_SOURCE)
+				dapm_widget_invalidate_input_paths(w);
+		}
+	}
+
+	mutex_unlock(&card->dapm_mutex);
+}
+EXPORT_SYMBOL_GPL(dapm_mark_endpoints_dirty);
+
+/* create a new dapm widget */
+static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
+	const struct snd_soc_dapm_widget *_widget)
+{
+	struct snd_soc_dapm_widget *w;
+
+	w = kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
+	if (!w)
+		return NULL;
+
+	/*
+	 * w->name is duplicated in caller, but w->sname isn't.
+	 * Duplicate it here if defined
+	 */
+	if (_widget->sname) {
+		w->sname = kstrdup_const(_widget->sname, GFP_KERNEL);
+		if (!w->sname) {
+			kfree(w);
+			return NULL;
+		}
+	}
+	return w;
+}
+
+struct dapm_kcontrol_data {
+	unsigned int value;
+	struct snd_soc_dapm_widget *widget;
+	struct list_head paths;
+	struct snd_soc_dapm_widget_list *wlist;
+};
+
+static int dapm_kcontrol_data_alloc(struct snd_soc_dapm_widget *widget,
+	struct snd_kcontrol *kcontrol, const char *ctrl_name)
+{
+	struct dapm_kcontrol_data *data;
+	struct soc_mixer_control *mc;
+	struct soc_enum *e;
+	const char *name;
+	int ret;
+
+	data = kzalloc(sizeof(*data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	INIT_LIST_HEAD(&data->paths);
+
+	switch (widget->id) {
+	case snd_soc_dapm_switch:
+	case snd_soc_dapm_mixer:
+	case snd_soc_dapm_mixer_named_ctl:
+		mc = (struct soc_mixer_control *)kcontrol->private_value;
+
+		if (mc->autodisable) {
+			struct snd_soc_dapm_widget template;
+
+			if (snd_soc_volsw_is_stereo(mc))
+				dev_warn(widget->dapm->dev,
+					 "ASoC: Unsupported stereo autodisable control '%s'\n",
+					 ctrl_name);
+
+			name = kasprintf(GFP_KERNEL, "%s %s", ctrl_name,
+					 "Autodisable");
+			if (!name) {
+				ret = -ENOMEM;
+				goto err_data;
+			}
+
+			memset(&template, 0, sizeof(template));
+			template.reg = mc->reg;
+			template.mask = (1 << fls(mc->max)) - 1;
+			template.shift = mc->shift;
+			if (mc->invert)
+				template.off_val = mc->max;
+			else
+				template.off_val = 0;
+			template.on_val = template.off_val;
+			template.id = snd_soc_dapm_kcontrol;
+			template.name = name;
+
+			data->value = template.on_val;
+
+			data->widget =
+				snd_soc_dapm_new_control_unlocked(widget->dapm,
+				&template);
+			kfree(name);
+			if (IS_ERR(data->widget)) {
+				ret = PTR_ERR(data->widget);
+				goto err_data;
+			}
+		}
+		break;
+	case snd_soc_dapm_demux:
+	case snd_soc_dapm_mux:
+		e = (struct soc_enum *)kcontrol->private_value;
+
+		if (e->autodisable) {
+			struct snd_soc_dapm_widget template;
+
+			name = kasprintf(GFP_KERNEL, "%s %s", ctrl_name,
+					 "Autodisable");
+			if (!name) {
+				ret = -ENOMEM;
+				goto err_data;
+			}
+
+			memset(&template, 0, sizeof(template));
+			template.reg = e->reg;
+			template.mask = e->mask;
+			template.shift = e->shift_l;
+			template.off_val = snd_soc_enum_item_to_val(e, 0);
+			template.on_val = template.off_val;
+			template.id = snd_soc_dapm_kcontrol;
+			template.name = name;
+
+			data->value = template.on_val;
+
+			data->widget = snd_soc_dapm_new_control_unlocked(
+						widget->dapm, &template);
+			kfree(name);
+			if (IS_ERR(data->widget)) {
+				ret = PTR_ERR(data->widget);
+				goto err_data;
+			}
+
+			snd_soc_dapm_add_path(widget->dapm, data->widget,
+					      widget, NULL, NULL);
+		} else if (e->reg != SND_SOC_NOPM) {
+			data->value = soc_dapm_read(widget->dapm, e->reg) &
+				      (e->mask << e->shift_l);
+		}
+		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,
+			     struct_size(new_wlist, widgets, 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));
+
+	for_each_card_widgets(card, w) {
+		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 unsigned int soc_dapm_read(struct snd_soc_dapm_context *dapm, int reg)
+{
+	if (!dapm->component)
+		return -EIO;
+	return  snd_soc_component_read(dapm->component, reg);
+}
+
+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;
+
+	if (w) {
+		struct list_head *wlist = &w->dapm->card->widgets;
+		const int depth = 2;
+		int i = 0;
+
+		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->component)
+		ret = snd_soc_component_set_bias_level(dapm->component, 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);
+
+	ret = snd_soc_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;
+
+	ret = snd_soc_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 item;
+	int i;
+
+	if (e->reg != SND_SOC_NOPM) {
+		unsigned int val;
+		val = soc_dapm_read(dapm, e->reg);
+		val = (val >> e->shift_l) & e->mask;
+		item = snd_soc_enum_val_to_item(e, val);
+	} else {
+		/* since a virtual mux has no backing registers to
+		 * decide which path to connect, it will try to match
+		 * with the first enumeration.  This is to ensure
+		 * that the default mux choice (the first) will be
+		 * correctly powered up during initialization.
+		 */
+		item = 0;
+	}
+
+	i = match_string(e->texts, e->items, control_name);
+	if (i < 0)
+		return -ENODEV;
+
+	path->name = e->texts[i];
+	path->connect = (i == item);
+	return 0;
+
+}
+
+/* set up initial codec paths */
+static void dapm_set_mixer_path_status(struct snd_soc_dapm_path *p, int i,
+				       int nth_path)
+{
+	struct soc_mixer_control *mc = (struct soc_mixer_control *)
+		p->sink->kcontrol_news[i].private_value;
+	unsigned int reg = mc->reg;
+	unsigned int invert = mc->invert;
+
+	if (reg != SND_SOC_NOPM) {
+		unsigned int shift = mc->shift;
+		unsigned int max = mc->max;
+		unsigned int mask = (1 << fls(max)) - 1;
+		unsigned int val = soc_dapm_read(p->sink->dapm, reg);
+
+		/*
+		 * 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)
+				val = soc_dapm_read(p->sink->dapm, mc->rreg);
+			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;
+
+	for_each_card_widgets(dapm->card, w) {
+		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_effect:
+			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;
+
+	for (i = 0; i < w->num_kcontrols; i++) {
+		int 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;
+	struct snd_soc_pcm_runtime *rtd = w->priv;
+
+	/* create control for links with > 1 config */
+	if (rtd->dai_link->num_params <= 1)
+		return 0;
+
+	/* add kcontrol */
+	for (i = 0; i < w->num_kcontrols; i++) {
+		struct snd_soc_dapm_context *dapm = w->dapm;
+		struct snd_card *card = dapm->card->snd_card;
+		struct snd_kcontrol *kcontrol = snd_soc_cnew(&w->kcontrol_news[i],
+							     w, w->name, NULL);
+		int 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 void dapm_widget_list_free(struct snd_soc_dapm_widget_list **list)
+{
+	kfree(*list);
+}
+
+static int dapm_widget_list_create(struct snd_soc_dapm_widget_list **list,
+	struct list_head *widgets)
+{
+	struct snd_soc_dapm_widget *w;
+	struct list_head *it;
+	unsigned int size = 0;
+	unsigned int i = 0;
+
+	list_for_each(it, widgets)
+		size++;
+
+	*list = kzalloc(struct_size(*list, widgets, size), GFP_KERNEL);
+	if (*list == NULL)
+		return -ENOMEM;
+
+	list_for_each_entry(w, widgets, work_list)
+		(*list)->widgets[i++] = w;
+
+	(*list)->num_widgets = i;
+
+	return 0;
+}
+
+/*
+ * Recursively reset the cached number of inputs or outputs for the specified
+ * widget and all widgets that can be reached via incoming or outcoming paths
+ * from the widget.
+ */
+static void invalidate_paths_ep(struct snd_soc_dapm_widget *widget,
+	enum snd_soc_dapm_direction dir)
+{
+	enum snd_soc_dapm_direction rdir = SND_SOC_DAPM_DIR_REVERSE(dir);
+	struct snd_soc_dapm_path *path;
+
+	widget->endpoints[dir] = -1;
+
+	snd_soc_dapm_widget_for_each_path(widget, rdir, path) {
+		if (path->weak || path->is_supply)
+			continue;
+
+		if (path->walking)
+			return;
+
+		if (path->connect) {
+			path->walking = 1;
+			invalidate_paths_ep(path->node[dir], dir);
+			path->walking = 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_dai_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);
+
+	if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
+		w = dai->playback_widget;
+		invalidate_paths_ep(w, SND_SOC_DAPM_DIR_OUT);
+		paths = is_connected_output_ep(w, &widgets,
+				custom_stop_condition);
+	} else {
+		w = dai->capture_widget;
+		invalidate_paths_ep(w, SND_SOC_DAPM_DIR_IN);
+		paths = is_connected_input_ep(w, &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;
+}
+EXPORT_SYMBOL_GPL(snd_soc_dapm_dai_get_connected_widgets);
+
+void snd_soc_dapm_dai_free_widgets(struct snd_soc_dapm_widget_list **list)
+{
+	dapm_widget_list_free(list);
+}
+EXPORT_SYMBOL_GPL(snd_soc_dapm_dai_free_widgets);
+
+/*
+ * Handler for regulator supply widget.
+ */
+int dapm_regulator_event(struct snd_soc_dapm_widget *w,
+		   struct snd_kcontrol *kcontrol, int event)
+{
+	int ret;
+
+	soc_dapm_async_complete(w->dapm);
+
+	if (SND_SOC_DAPM_EVENT_ON(event)) {
+		if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
+			ret = regulator_allow_bypass(w->regulator, false);
+			if (ret != 0)
+				dev_warn(w->dapm->dev,
+					 "ASoC: Failed to unbypass %s: %d\n",
+					 w->name, ret);
+		}
+
+		return regulator_enable(w->regulator);
+	} else {
+		if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
+			ret = regulator_allow_bypass(w->regulator, true);
+			if (ret != 0)
+				dev_warn(w->dapm->dev,
+					 "ASoC: Failed to bypass %s: %d\n",
+					 w->name, ret);
+		}
+
+		return regulator_disable_deferred(w->regulator, w->shift);
+	}
+}
+EXPORT_SYMBOL_GPL(dapm_regulator_event);
+
+/*
+ * Handler for pinctrl widget.
+ */
+int dapm_pinctrl_event(struct snd_soc_dapm_widget *w,
+		       struct snd_kcontrol *kcontrol, int event)
+{
+	struct snd_soc_dapm_pinctrl_priv *priv = w->priv;
+	struct pinctrl *p = w->pinctrl;
+	struct pinctrl_state *s;
+
+	if (!p || !priv)
+		return -EIO;
+
+	if (SND_SOC_DAPM_EVENT_ON(event))
+		s = pinctrl_lookup_state(p, priv->active_state);
+	else
+		s = pinctrl_lookup_state(p, priv->sleep_state);
+
+	if (IS_ERR(s))
+		return PTR_ERR(s);
+
+	return pinctrl_select_state(p, s);
+}
+EXPORT_SYMBOL_GPL(dapm_pinctrl_event);
+
+/*
+ * Handler for clock supply widget.
+ */
+int dapm_clock_event(struct snd_soc_dapm_widget *w,
+		   struct snd_kcontrol *kcontrol, int event)
+{
+	if (!w->clk)
+		return -EIO;
+
+	soc_dapm_async_complete(w->dapm);
+
+	if (SND_SOC_DAPM_EVENT_ON(event)) {
+		return clk_prepare_enable(w->clk);
+	} else {
+		clk_disable_unprepare(w->clk);
+		return 0;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(dapm_clock_event);
+
+static int dapm_widget_power_check(struct snd_soc_dapm_widget *w)
+{
+	if (w->power_checked)
+		return w->new_power;
+
+	if (w->force)
+		w->new_power = 1;
+	else
+		w->new_power = w->power_check(w);
+
+	w->power_checked = true;
+
+	return w->new_power;
+}
+
+/* Generic check to see if a widget should be powered. */
+static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
+{
+	int in, out;
+
+	DAPM_UPDATE_STAT(w, power_checks);
+
+	in = is_connected_input_ep(w, NULL, NULL);
+	out = is_connected_output_ep(w, NULL, NULL);
+	return out != 0 && in != 0;
+}
+
+/* Check to see if a power supply is needed */
+static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
+{
+	struct snd_soc_dapm_path *path;
+
+	DAPM_UPDATE_STAT(w, power_checks);
+
+	/* Check if one of our outputs is connected */
+	snd_soc_dapm_widget_for_each_sink_path(w, path) {
+		DAPM_UPDATE_STAT(w, neighbour_checks);
+
+		if (path->weak)
+			continue;
+
+		if (path->connected &&
+		    !path->connected(path->source, path->sink))
+			continue;
+
+		if (dapm_widget_power_check(path->sink))
+			return 1;
+	}
+
+	return 0;
+}
+
+static int dapm_always_on_check_power(struct snd_soc_dapm_widget *w)
+{
+	return w->connected;
+}
+
+static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
+			    struct snd_soc_dapm_widget *b,
+			    bool power_up)
+{
+	int *sort;
+
+	BUILD_BUG_ON(ARRAY_SIZE(dapm_up_seq) != SND_SOC_DAPM_TYPE_COUNT);
+	BUILD_BUG_ON(ARRAY_SIZE(dapm_down_seq) != SND_SOC_DAPM_TYPE_COUNT);
+
+	if (power_up)
+		sort = dapm_up_seq;
+	else
+		sort = dapm_down_seq;
+
+	WARN_ONCE(sort[a->id] == 0, "offset a->id %d not initialized\n", a->id);
+	WARN_ONCE(sort[b->id] == 0, "offset b->id %d not initialized\n", b->id);
+
+	if (sort[a->id] != sort[b->id])
+		return sort[a->id] - sort[b->id];
+	if (a->subseq != b->subseq) {
+		if (power_up)
+			return a->subseq - b->subseq;
+		else
+			return b->subseq - a->subseq;
+	}
+	if (a->reg != b->reg)
+		return a->reg - b->reg;
+	if (a->dapm != b->dapm)
+		return (unsigned long)a->dapm - (unsigned long)b->dapm;
+
+	return 0;
+}
+
+/* Insert a widget in order into a DAPM power sequence. */
+static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
+			    struct list_head *list,
+			    bool power_up)
+{
+	struct snd_soc_dapm_widget *w;
+
+	list_for_each_entry(w, list, power_list)
+		if (dapm_seq_compare(new_widget, w, power_up) < 0) {
+			list_add_tail(&new_widget->power_list, &w->power_list);
+			return;
+		}
+
+	list_add_tail(&new_widget->power_list, list);
+}
+
+static void dapm_seq_check_event(struct snd_soc_card *card,
+				 struct snd_soc_dapm_widget *w, int event)
+{
+	const char *ev_name;
+	int power;
+
+	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)) {
+		int ret;
+
+		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 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) {
+		int 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->component) {
+				for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
+					if (sort[i] == cur_sort)
+						snd_soc_component_seq_notifier(
+							cur_dapm->component,
+							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)
+				continue;
+
+			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)
+				continue;
+
+			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->component) {
+		for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
+			if (sort[i] == cur_sort)
+				snd_soc_component_seq_notifier(
+					cur_dapm->component,
+					i, cur_subseq);
+	}
+
+	for_each_card_dapms(card, d)
+		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_each_dapm_widgets(wlist, wi, w) {
+		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_each_dapm_widgets(wlist, wi, w) {
+		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 && cookie)
+			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 && cookie)
+			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;
+	int ret;
+
+	lockdep_assert_held(&card->dapm_mutex);
+
+	trace_snd_soc_dapm_start(card);
+
+	for_each_card_dapms(card, d) {
+		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);
+	}
+
+	for_each_card_widgets(card, w) {
+		switch (w->id) {
+		case snd_soc_dapm_pre:
+		case snd_soc_dapm_post:
+			/* These widgets always need to be powered */
+			break;
+		default:
+			list_del_init(&w->dirty);
+			break;
+		}
+
+		if (w->new_power) {
+			d = w->dapm;
+
+			/* Supplies and micbiases only bring the
+			 * context up to STANDBY as unless something
+			 * else is active and passing audio they
+			 * generally don't require full power.  Signal
+			 * generators are virtual pins and have no
+			 * power impact themselves.
+			 */
+			switch (w->id) {
+			case snd_soc_dapm_siggen:
+			case snd_soc_dapm_vmid:
+				break;
+			case snd_soc_dapm_supply:
+			case snd_soc_dapm_regulator_supply:
+			case snd_soc_dapm_pinctrl:
+			case snd_soc_dapm_clock_supply:
+			case snd_soc_dapm_micbias:
+				if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
+					d->target_bias_level = SND_SOC_BIAS_STANDBY;
+				break;
+			default:
+				d->target_bias_level = SND_SOC_BIAS_ON;
+				break;
+			}
+		}
+
+	}
+
+	/* Force all contexts in the card to the same bias state if
+	 * they're not ground referenced.
+	 */
+	bias = SND_SOC_BIAS_OFF;
+	for_each_card_dapms(card, d)
+		if (d->target_bias_level > bias)
+			bias = d->target_bias_level;
+	for_each_card_dapms(card, d)
+		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 */
+	for_each_card_dapms(card, d) {
+		if (d != &card->dapm && d->bias_level != d->target_bias_level)
+			async_schedule_domain(dapm_pre_sequence_async, d,
+						&async_domain);
+	}
+	async_synchronize_full_domain(&async_domain);
+
+	list_for_each_entry(w, &down_list, power_list) {
+		dapm_seq_check_event(card, w, SND_SOC_DAPM_WILL_PMD);
+	}
+
+	list_for_each_entry(w, &up_list, power_list) {
+		dapm_seq_check_event(card, w, SND_SOC_DAPM_WILL_PMU);
+	}
+
+	/* Power down widgets first; try to avoid amplifying pops. */
+	dapm_seq_run(card, &down_list, event, false);
+
+	dapm_widget_update(card);
+
+	/* Now power up. */
+	dapm_seq_run(card, &up_list, event, true);
+
+	/* Run all the bias changes in parallel */
+	for_each_card_dapms(card, d) {
+		if (d != &card->dapm && d->bias_level != d->target_bias_level)
+			async_schedule_domain(dapm_post_sequence_async, d,
+						&async_domain);
+	}
+	async_synchronize_full_domain(&async_domain);
+	/* Run card bias changes at last */
+	dapm_post_sequence_async(&card->dapm, 0);
+
+	/* do we need to notify any clients that DAPM event is complete */
+	for_each_card_dapms(card, d) {
+		if (!d->component)
+			continue;
+
+		ret = snd_soc_component_stream_event(d->component, event);
+		if (ret < 0)
+			return ret;
+	}
+
+	pop_dbg(card->dev, card->pop_time,
+		"DAPM sequencing finished, waiting %dms\n", card->pop_time);
+	pop_wait(card->pop_time);
+
+	trace_snd_soc_dapm_done(card);
+
+	return 0;
+}
+
+#ifdef CONFIG_DEBUG_FS
+static ssize_t dapm_widget_power_read_file(struct file *file,
+					   char __user *user_buf,
+					   size_t count, loff_t *ppos)
+{
+	struct snd_soc_dapm_widget *w = file->private_data;
+	struct snd_soc_card *card = w->dapm->card;
+	enum snd_soc_dapm_direction dir, rdir;
+	char *buf;
+	int in, out;
+	ssize_t ret;
+	struct snd_soc_dapm_path *p = NULL;
+
+	buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	mutex_lock(&card->dapm_mutex);
+
+	/* Supply widgets are not handled by is_connected_{input,output}_ep() */
+	if (w->is_supply) {
+		in = 0;
+		out = 0;
+	} else {
+		in = is_connected_input_ep(w, NULL, NULL);
+		out = is_connected_output_ep(w, NULL, NULL);
+	}
+
+	ret = scnprintf(buf, PAGE_SIZE, "%s: %s%s  in %d out %d",
+		       w->name, w->power ? "On" : "Off",
+		       w->force ? " (forced)" : "", in, out);
+
+	if (w->reg >= 0)
+		ret += scnprintf(buf + ret, PAGE_SIZE - ret,
+				" - R%d(0x%x) mask 0x%x",
+				w->reg, w->reg, w->mask << w->shift);
+
+	ret += scnprintf(buf + ret, PAGE_SIZE - ret, "\n");
+
+	if (w->sname)
+		ret += scnprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
+				w->sname,
+				w->active ? "active" : "inactive");
+
+	snd_soc_dapm_for_each_direction(dir) {
+		rdir = SND_SOC_DAPM_DIR_REVERSE(dir);
+		snd_soc_dapm_widget_for_each_path(w, dir, p) {
+			if (p->connected && !p->connected(p->source, p->sink))
+				continue;
+
+			if (!p->connect)
+				continue;
+
+			ret += scnprintf(buf + ret, PAGE_SIZE - ret,
+					" %s  \"%s\" \"%s\"\n",
+					(rdir == SND_SOC_DAPM_DIR_IN) ? "in" : "out",
+					p->name ? p->name : "static",
+					p->node[rdir]->name);
+		}
+	}
+
+	mutex_unlock(&card->dapm_mutex);
+
+	ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
+
+	kfree(buf);
+	return ret;
+}
+
+static const struct file_operations dapm_widget_power_fops = {
+	.open = simple_open,
+	.read = dapm_widget_power_read_file,
+	.llseek = default_llseek,
+};
+
+static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
+				   size_t count, loff_t *ppos)
+{
+	struct snd_soc_dapm_context *dapm = file->private_data;
+	char *level;
+
+	switch (dapm->bias_level) {
+	case SND_SOC_BIAS_ON:
+		level = "On\n";
+		break;
+	case SND_SOC_BIAS_PREPARE:
+		level = "Prepare\n";
+		break;
+	case SND_SOC_BIAS_STANDBY:
+		level = "Standby\n";
+		break;
+	case SND_SOC_BIAS_OFF:
+		level = "Off\n";
+		break;
+	default:
+		WARN(1, "Unknown bias_level %d\n", dapm->bias_level);
+		level = "Unknown\n";
+		break;
+	}
+
+	return simple_read_from_buffer(user_buf, count, ppos, level,
+				       strlen(level));
+}
+
+static const struct file_operations dapm_bias_fops = {
+	.open = simple_open,
+	.read = dapm_bias_read_file,
+	.llseek = default_llseek,
+};
+
+void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
+	struct dentry *parent)
+{
+	if (!parent || IS_ERR(parent))
+		return;
+
+	dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
+
+	debugfs_create_file("bias_level", 0444, dapm->debugfs_dapm, dapm,
+			    &dapm_bias_fops);
+}
+
+static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
+{
+	struct snd_soc_dapm_context *dapm = w->dapm;
+
+	if (!dapm->debugfs_dapm || !w->name)
+		return;
+
+	debugfs_create_file(w->name, 0444, dapm->debugfs_dapm, w,
+			    &dapm_widget_power_fops);
+}
+
+static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
+{
+	debugfs_remove_recursive(dapm->debugfs_dapm);
+	dapm->debugfs_dapm = NULL;
+}
+
+#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 (e && !(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)
+		snd_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)
+		snd_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, int count)
+{
+	struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(cmpnt);
+	struct snd_soc_dapm_widget *w;
+	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;
+
+	for_each_card_widgets(cmpnt->card, w) {
+		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_effect:
+		case snd_soc_dapm_out_drv:
+		case snd_soc_dapm_mixer:
+		case snd_soc_dapm_mixer_named_ctl:
+		case snd_soc_dapm_supply:
+		case snd_soc_dapm_regulator_supply:
+		case snd_soc_dapm_pinctrl:
+		case snd_soc_dapm_clock_supply:
+			if (w->name)
+				count += sysfs_emit_at(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 += sysfs_emit_at(buf, count, "PM State: %s\n", state);
+
+	return count;
+}
+
+/* show dapm widget status in sys fs */
+static ssize_t dapm_widget_show(struct device *dev,
+	struct device_attribute *attr, char *buf)
+{
+	struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
+	struct snd_soc_dai *codec_dai;
+	int i, count = 0;
+
+	mutex_lock(&rtd->card->dapm_mutex);
+
+	for_each_rtd_codec_dais(rtd, i, codec_dai) {
+		struct snd_soc_component *cmpnt = codec_dai->component;
+
+		count = dapm_widget_show_component(cmpnt, buf, count);
+	}
+
+	mutex_unlock(&rtd->card->dapm_mutex);
+
+	return count;
+}
+
+static DEVICE_ATTR_RO(dapm_widget);
+
+struct attribute *soc_dapm_dev_attrs[] = {
+	&dev_attr_dapm_widget.attr,
+	NULL
+};
+
+static void dapm_free_path(struct snd_soc_dapm_path *path)
+{
+	list_del(&path->list_node[SND_SOC_DAPM_DIR_IN]);
+	list_del(&path->list_node[SND_SOC_DAPM_DIR_OUT]);
+	list_del(&path->list_kcontrol);
+	list_del(&path->list);
+	kfree(path);
+}
+
+/**
+ * snd_soc_dapm_free_widget - Free specified widget
+ * @w: widget to free
+ *
+ * Removes widget from all paths and frees memory occupied by it.
+ */
+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);
+	list_del(&w->dirty);
+	/*
+	 * remove source and sink paths associated to this widget.
+	 * While removing the path, remove reference to it from both
+	 * source and sink widgets so that path is removed only once.
+	 */
+	snd_soc_dapm_for_each_direction(dir) {
+		snd_soc_dapm_widget_for_each_path_safe(w, dir, p, next_p)
+			dapm_free_path(p);
+	}
+
+	kfree(w->kcontrols);
+	kfree_const(w->name);
+	kfree_const(w->sname);
+	kfree(w);
+}
+EXPORT_SYMBOL_GPL(snd_soc_dapm_free_widget);
+
+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;
+
+	for_each_card_widgets_safe(dapm->card, w, next_w) {
+		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;
+	char prefixed_pin[80];
+	const char *pin_name;
+	const char *prefix = soc_dapm_prefix(dapm);
+
+	if (prefix) {
+		snprintf(prefixed_pin, sizeof(prefixed_pin), "%s %s",
+			 prefix, pin);
+		pin_name = prefixed_pin;
+	} else {
+		pin_name = pin;
+	}
+
+	for_each_card_widgets(dapm->card, w) {
+		if (!strcmp(w->name, pin_name)) {
+			if (w->dapm == dapm)
+				return w;
+			else
+				fallback = w;
+		}
+	}
+
+	if (search_other_contexts)
+		return fallback;
+
+	return NULL;
+}
+
+/*
+ * set the DAPM pin status:
+ * returns 1 when the value has been updated, 0 when unchanged, or a negative
+ * error code; called from kcontrol put callback
+ */
+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);
+	int ret = 0;
+
+	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);
+		ret = 1;
+	}
+
+	w->connected = status;
+	if (status == 0)
+		w->force = 0;
+
+	return ret;
+}
+
+/*
+ * similar as __snd_soc_dapm_set_pin(), but returns 0 when successful;
+ * called from several API functions below
+ */
+static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
+				const char *pin, int status)
+{
+	int ret = __snd_soc_dapm_set_pin(dapm, pin, status);
+
+	return ret < 0 ? ret : 0;
+}
+
+/**
+ * snd_soc_dapm_sync_unlocked - scan and power dapm paths
+ * @dapm: DAPM context
+ *
+ * Walks all dapm audio paths and powers widgets according to their
+ * stream or path usage.
+ *
+ * Requires external locking.
+ *
+ * Returns 0 for success.
+ */
+int snd_soc_dapm_sync_unlocked(struct snd_soc_dapm_context *dapm)
+{
+	/*
+	 * Suppress early reports (eg, jacks syncing their state) to avoid
+	 * silly DAPM runs during card startup.
+	 */
+	if (!dapm->card || !dapm->card->instantiated)
+		return 0;
+
+	return dapm_power_widgets(dapm->card, SND_SOC_DAPM_STREAM_NOP);
+}
+EXPORT_SYMBOL_GPL(snd_soc_dapm_sync_unlocked);
+
+/**
+ * snd_soc_dapm_sync - scan and power dapm paths
+ * @dapm: DAPM context
+ *
+ * Walks all dapm audio paths and powers widgets according to their
+ * stream or path usage.
+ *
+ * Returns 0 for success.
+ */
+int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
+{
+	int ret;
+
+	mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
+	ret = snd_soc_dapm_sync_unlocked(dapm);
+	mutex_unlock(&dapm->card->dapm_mutex);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
+
+static int dapm_update_dai_chan(struct snd_soc_dapm_path *p,
+				struct snd_soc_dapm_widget *w,
+				int channels)
+{
+	switch (w->id) {
+	case snd_soc_dapm_aif_out:
+	case snd_soc_dapm_aif_in:
+		break;
+	default:
+		return 0;
+	}
+
+	dev_dbg(w->dapm->dev, "%s DAI route %s -> %s\n",
+		w->channel < channels ? "Connecting" : "Disconnecting",
+		p->source->name, p->sink->name);
+
+	if (w->channel < channels)
+		soc_dapm_connect_path(p, true, "dai update");
+	else
+		soc_dapm_connect_path(p, false, "dai update");
+
+	return 0;
+}
+
+static int dapm_update_dai_unlocked(struct snd_pcm_substream *substream,
+				    struct snd_pcm_hw_params *params,
+				    struct snd_soc_dai *dai)
+{
+	int dir = substream->stream;
+	int channels = params_channels(params);
+	struct snd_soc_dapm_path *p;
+	struct snd_soc_dapm_widget *w;
+	int ret;
+
+	w = snd_soc_dai_get_widget(dai, dir);
+
+	if (!w)
+		return 0;
+
+	dev_dbg(dai->dev, "Update DAI routes for %s %s\n", dai->name,
+		dir == SNDRV_PCM_STREAM_PLAYBACK ? "playback" : "capture");
+
+	snd_soc_dapm_widget_for_each_sink_path(w, p) {
+		ret = dapm_update_dai_chan(p, p->sink, channels);
+		if (ret < 0)
+			return ret;
+	}
+
+	snd_soc_dapm_widget_for_each_source_path(w, p) {
+		ret = dapm_update_dai_chan(p, p->source, channels);
+		if (ret < 0)
+			return ret;
+	}
+
+	return 0;
+}
+
+int snd_soc_dapm_update_dai(struct snd_pcm_substream *substream,
+			    struct snd_pcm_hw_params *params,
+			    struct snd_soc_dai *dai)
+{
+	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+	int ret;
+
+	mutex_lock_nested(&rtd->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
+	ret = dapm_update_dai_unlocked(substream, params, dai);
+	mutex_unlock(&rtd->card->dapm_mutex);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(snd_soc_dapm_update_dai);
+
+/*
+ * dapm_update_widget_flags() - Re-compute widget sink and source flags
+ * @w: The widget for which to update the flags
+ *
+ * Some widgets have a dynamic category which depends on which neighbors they
+ * are connected to. This function update the category for these widgets.
+ *
+ * This function must be called whenever a path is added or removed to a widget.
+ */
+static void dapm_update_widget_flags(struct snd_soc_dapm_widget *w)
+{
+	enum snd_soc_dapm_direction dir;
+	struct snd_soc_dapm_path *p;
+	unsigned int ep;
+
+	switch (w->id) {
+	case snd_soc_dapm_input:
+		/* On a fully routed card an input is never a source */
+		if (w->dapm->card->fully_routed)
+			return;
+		ep = SND_SOC_DAPM_EP_SOURCE;
+		snd_soc_dapm_widget_for_each_source_path(w, p) {
+			if (p->source->id == snd_soc_dapm_micbias ||
+				p->source->id == snd_soc_dapm_mic ||
+				p->source->id == snd_soc_dapm_line ||
+				p->source->id == snd_soc_dapm_output) {
+					ep = 0;
+					break;
+			}
+		}
+		break;
+	case snd_soc_dapm_output:
+		/* On a fully routed card a output is never a sink */
+		if (w->dapm->card->fully_routed)
+			return;
+		ep = SND_SOC_DAPM_EP_SINK;
+		snd_soc_dapm_widget_for_each_sink_path(w, p) {
+			if (p->sink->id == snd_soc_dapm_spk ||
+				p->sink->id == snd_soc_dapm_hp ||
+				p->sink->id == snd_soc_dapm_line ||
+				p->sink->id == snd_soc_dapm_input) {
+					ep = 0;
+					break;
+			}
+		}
+		break;
+	case snd_soc_dapm_line:
+		ep = 0;
+		snd_soc_dapm_for_each_direction(dir) {
+			if (!list_empty(&w->edges[dir]))
+				ep |= SND_SOC_DAPM_DIR_TO_EP(dir);
+		}
+		break;
+	default:
+		return;
+	}
+
+	w->is_ep = ep;
+}
+
+static int snd_soc_dapm_check_dynamic_path(struct snd_soc_dapm_context *dapm,
+	struct snd_soc_dapm_widget *source, struct snd_soc_dapm_widget *sink,
+	const char *control)
+{
+	bool dynamic_source = false;
+	bool dynamic_sink = false;
+
+	if (!control)
+		return 0;
+
+	switch (source->id) {
+	case snd_soc_dapm_demux:
+		dynamic_source = true;
+		break;
+	default:
+		break;
+	}
+
+	switch (sink->id) {
+	case snd_soc_dapm_mux:
+	case snd_soc_dapm_switch:
+	case snd_soc_dapm_mixer:
+	case snd_soc_dapm_mixer_named_ctl:
+		dynamic_sink = true;
+		break;
+	default:
+		break;
+	}
+
+	if (dynamic_source && dynamic_sink) {
+		dev_err(dapm->dev,
+			"Direct connection between demux and mixer/mux not supported for path %s -> [%s] -> %s\n",
+			source->name, control, sink->name);
+		return -EINVAL;
+	} else if (!dynamic_source && !dynamic_sink) {
+		dev_err(dapm->dev,
+			"Control not supported for path %s -> [%s] -> %s\n",
+			source->name, control, sink->name);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int snd_soc_dapm_add_path(struct snd_soc_dapm_context *dapm,
+	struct snd_soc_dapm_widget *wsource, struct snd_soc_dapm_widget *wsink,
+	const char *control,
+	int (*connected)(struct snd_soc_dapm_widget *source,
+			 struct snd_soc_dapm_widget *sink))
+{
+	struct snd_soc_dapm_widget *widgets[2];
+	enum snd_soc_dapm_direction dir;
+	struct snd_soc_dapm_path *path;
+	int ret;
+
+	if (wsink->is_supply && !wsource->is_supply) {
+		dev_err(dapm->dev,
+			"Connecting non-supply widget to supply widget is not supported (%s -> %s)\n",
+			wsource->name, wsink->name);
+		return -EINVAL;
+	}
+
+	if (connected && !wsource->is_supply) {
+		dev_err(dapm->dev,
+			"connected() callback only supported for supply widgets (%s -> %s)\n",
+			wsource->name, wsink->name);
+		return -EINVAL;
+	}
+
+	if (wsource->is_supply && control) {
+		dev_err(dapm->dev,
+			"Conditional paths are not supported for supply widgets (%s -> [%s] -> %s)\n",
+			wsource->name, control, wsink->name);
+		return -EINVAL;
+	}
+
+	ret = snd_soc_dapm_check_dynamic_path(dapm, wsource, wsink, control);
+	if (ret)
+		return ret;
+
+	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;
+	unsigned int sink_ref = 0;
+	unsigned int source_ref = 0;
+	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
+	 */
+	for_each_card_widgets(dapm->card, w) {
+		if (!wsink && !(strcmp(w->name, sink))) {
+			wtsink = w;
+			if (w->dapm == dapm) {
+				wsink = w;
+				if (wsource)
+					break;
+			}
+			sink_ref++;
+			if (sink_ref > 1)
+				dev_warn(dapm->dev,
+					"ASoC: sink widget %s overwritten\n",
+					w->name);
+			continue;
+		}
+		if (!wsource && !(strcmp(w->name, source))) {
+			wtsource = w;
+			if (w->dapm == dapm) {
+				wsource = w;
+				if (wsink)
+					break;
+			}
+			source_ref++;
+			if (source_ref > 1)
+				dev_warn(dapm->dev,
+					"ASoC: source widget %s overwritten\n",
+					w->name);
+		}
+	}
+	/* 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_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) {
+		struct snd_soc_dapm_widget *wsource = path->source;
+		struct snd_soc_dapm_widget *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, ret = 0;
+
+	mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
+	for (i = 0; i < num; i++) {
+		int r = snd_soc_dapm_add_route(dapm, route);
+		if (r < 0) {
+			dev_err(dapm->dev, "ASoC: Failed to add route %s -> %s -> %s\n",
+				route->source,
+				route->control ? route->control : "direct",
+				route->sink);
+			ret = r;
+		}
+		route++;
+	}
+	mutex_unlock(&dapm->card->dapm_mutex);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
+
+/**
+ * snd_soc_dapm_del_routes - Remove routes between DAPM widgets
+ * @dapm: DAPM context
+ * @route: audio routes
+ * @num: number of routes
+ *
+ * Removes routes from the DAPM context.
+ */
+int snd_soc_dapm_del_routes(struct snd_soc_dapm_context *dapm,
+			    const struct snd_soc_dapm_route *route, int num)
+{
+	int i;
+
+	mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
+	for (i = 0; i < num; i++) {
+		snd_soc_dapm_del_route(dapm, route);
+		route++;
+	}
+	mutex_unlock(&dapm->card->dapm_mutex);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(snd_soc_dapm_del_routes);
+
+static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm,
+				   const struct snd_soc_dapm_route *route)
+{
+	struct snd_soc_dapm_widget *source = dapm_find_widget(dapm,
+							      route->source,
+							      true);
+	struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm,
+							    route->sink,
+							    true);
+	struct snd_soc_dapm_path *path;
+	int count = 0;
+
+	if (!source) {
+		dev_err(dapm->dev, "ASoC: Unable to find source %s for weak route\n",
+			route->source);
+		return -ENODEV;
+	}
+
+	if (!sink) {
+		dev_err(dapm->dev, "ASoC: Unable to find sink %s for weak route\n",
+			route->sink);
+		return -ENODEV;
+	}
+
+	if (route->control || route->connected)
+		dev_warn(dapm->dev, "ASoC: Ignoring control for weak route %s->%s\n",
+			 route->source, route->sink);
+
+	snd_soc_dapm_widget_for_each_sink_path(source, path) {
+		if (path->sink == sink) {
+			path->weak = 1;
+			count++;
+		}
+	}
+
+	if (count == 0)
+		dev_err(dapm->dev, "ASoC: No path found for weak route %s->%s\n",
+			route->source, route->sink);
+	if (count > 1)
+		dev_warn(dapm->dev, "ASoC: %d paths found for weak route %s->%s\n",
+			 count, route->source, route->sink);
+
+	return 0;
+}
+
+/**
+ * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
+ * @dapm: DAPM context
+ * @route: audio routes
+ * @num: number of routes
+ *
+ * Mark existing routes matching those specified in the passed array
+ * as being weak, meaning that they are ignored for the purpose of
+ * power decisions.  The main intended use case is for sidetone paths
+ * which couple audio between other independent paths if they are both
+ * active in order to make the combination work better at the user
+ * level but which aren't intended to be "used".
+ *
+ * Note that CODEC drivers should not use this as sidetone type paths
+ * can frequently also be used as bypass paths.
+ */
+int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm,
+			     const struct snd_soc_dapm_route *route, int num)
+{
+	int i;
+	int ret = 0;
+
+	mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
+	for (i = 0; i < num; i++) {
+		int 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);
+
+	for_each_card_widgets(card, w)
+	{
+		if (w->new)
+			continue;
+
+		if (w->num_kcontrols) {
+			w->kcontrols = kcalloc(w->num_kcontrols,
+						sizeof(struct snd_kcontrol *),
+						GFP_KERNEL);
+			if (!w->kcontrols) {
+				mutex_unlock(&card->dapm_mutex);
+				return -ENOMEM;
+			}
+		}
+
+		switch(w->id) {
+		case snd_soc_dapm_switch:
+		case snd_soc_dapm_mixer:
+		case snd_soc_dapm_mixer_named_ctl:
+			dapm_new_mixer(w);
+			break;
+		case snd_soc_dapm_mux:
+		case snd_soc_dapm_demux:
+			dapm_new_mux(w);
+			break;
+		case snd_soc_dapm_pga:
+		case snd_soc_dapm_effect:
+		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) {
+			val = soc_dapm_read(w->dapm, w->reg);
+			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;
+
+	mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
+	if (dapm_kcontrol_is_powered(kcontrol) && reg != SND_SOC_NOPM) {
+		reg_val = soc_dapm_read(dapm, reg);
+		val = (reg_val >> shift) & mask;
+
+		if (reg != mc->rreg)
+			reg_val = soc_dapm_read(dapm, mc->rreg);
+
+		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 (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 0;
+}
+EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
+
+/**
+ * snd_soc_dapm_put_volsw - dapm mixer set callback
+ * @kcontrol: mixer control
+ * @ucontrol: control element information
+ *
+ * Callback to set the value of a dapm mixer control.
+ *
+ * Returns 0 for success.
+ */
+int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
+	struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
+	struct snd_soc_card *card = dapm->card;
+	struct soc_mixer_control *mc =
+		(struct soc_mixer_control *)kcontrol->private_value;
+	int reg = mc->reg;
+	unsigned int shift = mc->shift;
+	int max = mc->max;
+	unsigned int width = fls(max);
+	unsigned int mask = (1 << width) - 1;
+	unsigned int invert = mc->invert;
+	unsigned int val, rval = 0;
+	int connect, rconnect = -1, change, reg_change = 0;
+	struct snd_soc_dapm_update update = {};
+	int ret = 0;
+
+	val = (ucontrol->value.integer.value[0] & mask);
+	connect = !!val;
+
+	if (invert)
+		val = max - val;
+
+	if (snd_soc_volsw_is_stereo(mc)) {
+		rval = (ucontrol->value.integer.value[1] & mask);
+		rconnect = !!rval;
+		if (invert)
+			rval = max - rval;
+	}
+
+	mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
+
+	/* This assumes field width < (bits in unsigned int / 2) */
+	if (width > sizeof(unsigned int) * 8 / 2)
+		dev_warn(dapm->dev,
+			 "ASoC: control %s field width limit exceeded\n",
+			 kcontrol->id.name);
+	change = dapm_kcontrol_set_value(kcontrol, val | (rval << width));
+
+	if (reg != SND_SOC_NOPM) {
+		val = val << shift;
+		rval = rval << mc->rshift;
+
+		reg_change = soc_dapm_test_bits(dapm, reg, mask << shift, val);
+
+		if (snd_soc_volsw_is_stereo(mc))
+			reg_change |= soc_dapm_test_bits(dapm, mc->rreg,
+							 mask << mc->rshift,
+							 rval);
+	}
+
+	if (change || reg_change) {
+		if (reg_change) {
+			if (snd_soc_volsw_is_stereo(mc)) {
+				update.has_second_set = true;
+				update.reg2 = mc->rreg;
+				update.mask2 = mask << mc->rshift;
+				update.val2 = rval;
+			}
+			update.kcontrol = kcontrol;
+			update.reg = reg;
+			update.mask = mask << shift;
+			update.val = val;
+			card->update = &update;
+		}
+
+		ret = soc_dapm_mixer_update_power(card, kcontrol, connect,
+						  rconnect);
+
+		card->update = NULL;
+	}
+
+	mutex_unlock(&card->dapm_mutex);
+
+	if (ret > 0)
+		snd_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)) {
+		reg_val = soc_dapm_read(dapm, e->reg);
+	} else {
+		reg_val = dapm_kcontrol_get_value(kcontrol);
+	}
+	mutex_unlock(&card->dapm_mutex);
+
+	val = (reg_val >> e->shift_l) & e->mask;
+	ucontrol->value.enumerated.item[0] = snd_soc_enum_val_to_item(e, val);
+	if (e->shift_l != e->shift_r) {
+		val = (reg_val >> e->shift_r) & e->mask;
+		val = snd_soc_enum_val_to_item(e, val);
+		ucontrol->value.enumerated.item[1] = val;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
+
+/**
+ * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
+ * @kcontrol: mixer control
+ * @ucontrol: control element information
+ *
+ * Callback to set the value of a dapm enumerated double mixer control.
+ *
+ * Returns 0 for success.
+ */
+int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
+	struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
+	struct snd_soc_card *card = dapm->card;
+	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
+	unsigned int *item = ucontrol->value.enumerated.item;
+	unsigned int val, change, reg_change = 0;
+	unsigned int mask;
+	struct snd_soc_dapm_update update = {};
+	int ret = 0;
+
+	if (item[0] >= e->items)
+		return -EINVAL;
+
+	val = snd_soc_enum_item_to_val(e, item[0]) << e->shift_l;
+	mask = e->mask << e->shift_l;
+	if (e->shift_l != e->shift_r) {
+		if (item[1] > e->items)
+			return -EINVAL;
+		val |= snd_soc_enum_item_to_val(e, item[1]) << e->shift_r;
+		mask |= e->mask << e->shift_r;
+	}
+
+	mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
+
+	change = dapm_kcontrol_set_value(kcontrol, val);
+
+	if (e->reg != SND_SOC_NOPM)
+		reg_change = soc_dapm_test_bits(dapm, e->reg, mask, val);
+
+	if (change || reg_change) {
+		if (reg_change) {
+			update.kcontrol = kcontrol;
+			update.reg = e->reg;
+			update.mask = mask;
+			update.val = val;
+			card->update = &update;
+		}
+
+		ret = soc_dapm_mux_update_power(card, kcontrol, item[0], e);
+
+		card->update = NULL;
+	}
+
+	mutex_unlock(&card->dapm_mutex);
+
+	if (ret > 0)
+		snd_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;
+	int ret;
+
+	mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
+	ret = __snd_soc_dapm_set_pin(&card->dapm, pin,
+				     !!ucontrol->value.integer.value[0]);
+	mutex_unlock(&card->dapm_mutex);
+
+	snd_soc_dapm_sync(&card->dapm);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
+
+struct snd_soc_dapm_widget *
+snd_soc_dapm_new_control_unlocked(struct snd_soc_dapm_context *dapm,
+			 const struct snd_soc_dapm_widget *widget)
+{
+	enum snd_soc_dapm_direction dir;
+	struct snd_soc_dapm_widget *w;
+	const char *prefix;
+	int ret = -ENOMEM;
+
+	if ((w = dapm_cnew_widget(widget)) == NULL)
+		goto cnew_failed;
+
+	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)
+		goto name_failed;
+
+	switch (w->id) {
+	case snd_soc_dapm_regulator_supply:
+		w->regulator = devm_regulator_get(dapm->dev, widget->name);
+		if (IS_ERR(w->regulator)) {
+			ret = PTR_ERR(w->regulator);
+			goto request_failed;
+		}
+
+		if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
+			ret = regulator_allow_bypass(w->regulator, true);
+			if (ret != 0)
+				dev_warn(dapm->dev,
+					 "ASoC: Failed to bypass %s: %d\n",
+					 w->name, ret);
+		}
+		break;
+	case snd_soc_dapm_pinctrl:
+		w->pinctrl = devm_pinctrl_get(dapm->dev);
+		if (IS_ERR(w->pinctrl)) {
+			ret = PTR_ERR(w->pinctrl);
+			goto request_failed;
+		}
+
+		/* set to sleep_state when initializing */
+		dapm_pinctrl_event(w, NULL, SND_SOC_DAPM_POST_PMD);
+		break;
+	case snd_soc_dapm_clock_supply:
+		w->clk = devm_clk_get(dapm->dev, widget->name);
+		if (IS_ERR(w->clk)) {
+			ret = PTR_ERR(w->clk);
+			goto request_failed;
+		}
+		break;
+	default:
+		break;
+	}
+
+	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_buffer:
+	case snd_soc_dapm_scheduler:
+	case snd_soc_dapm_effect:
+	case snd_soc_dapm_src:
+	case snd_soc_dapm_asrc:
+	case snd_soc_dapm_encoder:
+	case snd_soc_dapm_decoder:
+	case snd_soc_dapm_out_drv:
+	case snd_soc_dapm_micbias:
+	case snd_soc_dapm_line:
+	case snd_soc_dapm_dai_link:
+	case snd_soc_dapm_dai_out:
+	case snd_soc_dapm_dai_in:
+		w->power_check = dapm_generic_check_power;
+		break;
+	case snd_soc_dapm_supply:
+	case snd_soc_dapm_regulator_supply:
+	case snd_soc_dapm_pinctrl:
+	case snd_soc_dapm_clock_supply:
+	case snd_soc_dapm_kcontrol:
+		w->is_supply = 1;
+		w->power_check = dapm_supply_check_power;
+		break;
+	default:
+		w->power_check = dapm_always_on_check_power;
+		break;
+	}
+
+	w->dapm = dapm;
+	INIT_LIST_HEAD(&w->list);
+	INIT_LIST_HEAD(&w->dirty);
+	/* see for_each_card_widgets */
+	list_add_tail(&w->list, &dapm->card->widgets);
+
+	snd_soc_dapm_for_each_direction(dir) {
+		INIT_LIST_HEAD(&w->edges[dir]);
+		w->endpoints[dir] = -1;
+	}
+
+	/* machine layer sets up unconnected pins and insertions */
+	w->connected = 1;
+	return w;
+
+request_failed:
+	dev_err_probe(dapm->dev, ret, "ASoC: Failed to request %s\n",
+		      w->name);
+	kfree_const(w->name);
+name_failed:
+	kfree_const(w->sname);
+	kfree(w);
+cnew_failed:
+	return ERR_PTR(ret);
+}
+
+/**
+ * snd_soc_dapm_new_control - create new dapm control
+ * @dapm: DAPM context
+ * @widget: widget template
+ *
+ * Creates new DAPM control based upon a template.
+ *
+ * Returns a widget pointer on success or an error pointer on failure
+ */
+struct snd_soc_dapm_widget *
+snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
+			 const struct snd_soc_dapm_widget *widget)
+{
+	struct snd_soc_dapm_widget *w;
+
+	mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
+	w = snd_soc_dapm_new_control_unlocked(dapm, widget);
+	mutex_unlock(&dapm->card->dapm_mutex);
+
+	return w;
+}
+EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
+
+/**
+ * snd_soc_dapm_new_controls - create new dapm controls
+ * @dapm: DAPM context
+ * @widget: widget array
+ * @num: number of widgets
+ *
+ * Creates new DAPM controls based upon the templates.
+ *
+ * Returns 0 for success else error.
+ */
+int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
+	const struct snd_soc_dapm_widget *widget,
+	int num)
+{
+	int i;
+	int ret = 0;
+
+	mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
+	for (i = 0; i < num; i++) {
+		struct snd_soc_dapm_widget *w = snd_soc_dapm_new_control_unlocked(dapm, widget);
+		if (IS_ERR(w)) {
+			ret = PTR_ERR(w);
+			break;
+		}
+		widget++;
+	}
+	mutex_unlock(&dapm->card->dapm_mutex);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
+
+static int
+snd_soc_dai_link_event_pre_pmu(struct snd_soc_dapm_widget *w,
+			       struct snd_pcm_substream *substream)
+{
+	struct snd_soc_dapm_path *path;
+	struct snd_soc_dai *source, *sink;
+	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+	struct snd_pcm_hw_params *params = NULL;
+	const struct snd_soc_pcm_stream *config = NULL;
+	struct snd_pcm_runtime *runtime = NULL;
+	unsigned int fmt;
+	int ret = 0;
+
+	/*
+	 * NOTE
+	 *
+	 * snd_pcm_hw_params is quite large (608 bytes on arm64) and is
+	 * starting to get a bit excessive for allocation on the stack,
+	 * especially when you're building with some of the KASAN type
+	 * stuff that increases stack usage.
+	 * So, we use kzalloc()/kfree() for params in this function.
+	 */
+	params = kzalloc(sizeof(*params), GFP_KERNEL);
+	if (!params)
+		return -ENOMEM;
+
+	runtime = kzalloc(sizeof(*runtime), GFP_KERNEL);
+	if (!runtime) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	substream->runtime = runtime;
+
+	substream->stream = SNDRV_PCM_STREAM_CAPTURE;
+	snd_soc_dapm_widget_for_each_source_path(w, path) {
+		source = path->source->priv;
+
+		ret = snd_soc_dai_startup(source, substream);
+		if (ret < 0)
+			goto out;
+
+		snd_soc_dai_activate(source, substream->stream);
+	}
+
+	substream->stream = SNDRV_PCM_STREAM_PLAYBACK;
+	snd_soc_dapm_widget_for_each_sink_path(w, path) {
+		sink = path->sink->priv;
+
+		ret = snd_soc_dai_startup(sink, substream);
+		if (ret < 0)
+			goto out;
+
+		snd_soc_dai_activate(sink, substream->stream);
+	}
+
+	substream->hw_opened = 1;
+
+	/*
+	 * Note: getting the config after .startup() gives a chance to
+	 * either party on the link to alter the configuration if
+	 * necessary
+	 */
+	config = rtd->dai_link->params + rtd->params_select;
+	if (!config) {
+		dev_err(w->dapm->dev, "ASoC: link config missing\n");
+		ret = -EINVAL;
+		goto out;
+	}
+
+	/* Be a little careful as we don't want to overflow the mask array */
+	if (!config->formats) {
+		dev_warn(w->dapm->dev, "ASoC: Invalid format was specified\n");
+
+		ret = -EINVAL;
+		goto out;
+	}
+
+	fmt = ffs(config->formats) - 1;
+
+	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;
+
+	substream->stream = SNDRV_PCM_STREAM_CAPTURE;
+	snd_soc_dapm_widget_for_each_source_path(w, path) {
+		source = path->source->priv;
+
+		ret = snd_soc_dai_hw_params(source, substream, params);
+		if (ret < 0)
+			goto out;
+
+		dapm_update_dai_unlocked(substream, params, source);
+	}
+
+	substream->stream = SNDRV_PCM_STREAM_PLAYBACK;
+	snd_soc_dapm_widget_for_each_sink_path(w, path) {
+		sink = path->sink->priv;
+
+		ret = snd_soc_dai_hw_params(sink, substream, params);
+		if (ret < 0)
+			goto out;
+
+		dapm_update_dai_unlocked(substream, params, sink);
+	}
+
+	runtime->format = params_format(params);
+	runtime->subformat = params_subformat(params);
+	runtime->channels = params_channels(params);
+	runtime->rate = params_rate(params);
+
+out:
+	/* see above NOTE */
+	kfree(params);
+
+	return ret;
+}
+
+static int snd_soc_dai_link_event(struct snd_soc_dapm_widget *w,
+				  struct snd_kcontrol *kcontrol, int event)
+{
+	struct snd_soc_dapm_path *path;
+	struct snd_soc_dai *source, *sink;
+	struct snd_pcm_substream *substream = w->priv;
+	int ret = 0, saved_stream = substream->stream;
+
+	if (WARN_ON(list_empty(&w->edges[SND_SOC_DAPM_DIR_OUT]) ||
+		    list_empty(&w->edges[SND_SOC_DAPM_DIR_IN])))
+		return -EINVAL;
+
+	switch (event) {
+	case SND_SOC_DAPM_PRE_PMU:
+		ret = snd_soc_dai_link_event_pre_pmu(w, substream);
+		if (ret < 0)
+			goto out;
+
+		break;
+
+	case SND_SOC_DAPM_POST_PMU:
+		snd_soc_dapm_widget_for_each_sink_path(w, path) {
+			sink = path->sink->priv;
+
+			snd_soc_dai_digital_mute(sink, 0, SNDRV_PCM_STREAM_PLAYBACK);
+			ret = 0;
+		}
+		break;
+
+	case SND_SOC_DAPM_PRE_PMD:
+		snd_soc_dapm_widget_for_each_sink_path(w, path) {
+			sink = path->sink->priv;
+
+			snd_soc_dai_digital_mute(sink, 1, SNDRV_PCM_STREAM_PLAYBACK);
+			ret = 0;
+		}
+
+		substream->stream = SNDRV_PCM_STREAM_CAPTURE;
+		snd_soc_dapm_widget_for_each_source_path(w, path) {
+			source = path->source->priv;
+			snd_soc_dai_hw_free(source, substream, 0);
+		}
+
+		substream->stream = SNDRV_PCM_STREAM_PLAYBACK;
+		snd_soc_dapm_widget_for_each_sink_path(w, path) {
+			sink = path->sink->priv;
+			snd_soc_dai_hw_free(sink, substream, 0);
+		}
+
+		substream->stream = SNDRV_PCM_STREAM_CAPTURE;
+		snd_soc_dapm_widget_for_each_source_path(w, path) {
+			source = path->source->priv;
+			snd_soc_dai_deactivate(source, substream->stream);
+			snd_soc_dai_shutdown(source, substream, 0);
+		}
+
+		substream->stream = SNDRV_PCM_STREAM_PLAYBACK;
+		snd_soc_dapm_widget_for_each_sink_path(w, path) {
+			sink = path->sink->priv;
+			snd_soc_dai_deactivate(sink, substream->stream);
+			snd_soc_dai_shutdown(sink, substream, 0);
+		}
+		break;
+
+	case SND_SOC_DAPM_POST_PMD:
+		kfree(substream->runtime);
+		break;
+
+	default:
+		WARN(1, "Unknown event %d\n", event);
+		ret = -EINVAL;
+	}
+
+out:
+	/* Restore the substream direction */
+	substream->stream = saved_stream;
+	return ret;
+}
+
+static int snd_soc_dapm_dai_link_get(struct snd_kcontrol *kcontrol,
+			  struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_dapm_widget *w = snd_kcontrol_chip(kcontrol);
+	struct snd_soc_pcm_runtime *rtd = w->priv;
+
+	ucontrol->value.enumerated.item[0] = rtd->params_select;
+
+	return 0;
+}
+
+static int snd_soc_dapm_dai_link_put(struct snd_kcontrol *kcontrol,
+			  struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_dapm_widget *w = snd_kcontrol_chip(kcontrol);
+	struct snd_soc_pcm_runtime *rtd = w->priv;
+
+	/* Can't change the config when widget is already powered */
+	if (w->power)
+		return -EBUSY;
+
+	if (ucontrol->value.enumerated.item[0] == rtd->params_select)
+		return 0;
+
+	if (ucontrol->value.enumerated.item[0] >= rtd->dai_link->num_params)
+		return -EINVAL;
+
+	rtd->params_select = ucontrol->value.enumerated.item[0];
+
+	return 1;
+}
+
+static void
+snd_soc_dapm_free_kcontrol(struct snd_soc_card *card,
+			unsigned long *private_value,
+			int num_params,
+			const char **w_param_text)
+{
+	int count;
+
+	devm_kfree(card->dev, (void *)*private_value);
+
+	if (!w_param_text)
+		return;
+
+	for (count = 0 ; count < num_params; count++)
+		devm_kfree(card->dev, (void *)w_param_text[count]);
+	devm_kfree(card->dev, w_param_text);
+}
+
+static struct snd_kcontrol_new *
+snd_soc_dapm_alloc_kcontrol(struct snd_soc_card *card,
+			char *link_name,
+			const struct snd_soc_pcm_stream *params,
+			int num_params, const char **w_param_text,
+			unsigned long *private_value)
+{
+	struct soc_enum w_param_enum[] = {
+		SOC_ENUM_SINGLE(0, 0, 0, NULL),
+	};
+	struct snd_kcontrol_new kcontrol_dai_link[] = {
+		SOC_ENUM_EXT(NULL, w_param_enum[0],
+			     snd_soc_dapm_dai_link_get,
+			     snd_soc_dapm_dai_link_put),
+	};
+	struct snd_kcontrol_new *kcontrol_news;
+	const struct snd_soc_pcm_stream *config = params;
+	int count;
+
+	for (count = 0 ; count < num_params; count++) {
+		if (!config->stream_name) {
+			dev_warn(card->dapm.dev,
+				"ASoC: anonymous config %d for dai link %s\n",
+				count, link_name);
+			w_param_text[count] =
+				devm_kasprintf(card->dev, GFP_KERNEL,
+					       "Anonymous Configuration %d",
+					       count);
+		} else {
+			w_param_text[count] = devm_kmemdup(card->dev,
+						config->stream_name,
+						strlen(config->stream_name) + 1,
+						GFP_KERNEL);
+		}
+		if (!w_param_text[count])
+			goto outfree_w_param;
+		config++;
+	}
+
+	w_param_enum[0].items = num_params;
+	w_param_enum[0].texts = w_param_text;
+
+	*private_value =
+		(unsigned long) devm_kmemdup(card->dev,
+			(void *)(kcontrol_dai_link[0].private_value),
+			sizeof(struct soc_enum), GFP_KERNEL);
+	if (!*private_value) {
+		dev_err(card->dev, "ASoC: Failed to create control for %s widget\n",
+			link_name);
+		goto outfree_w_param;
+	}
+	kcontrol_dai_link[0].private_value = *private_value;
+	/* duplicate kcontrol_dai_link on heap so that memory persists */
+	kcontrol_news = devm_kmemdup(card->dev, &kcontrol_dai_link[0],
+					sizeof(struct snd_kcontrol_new),
+					GFP_KERNEL);
+	if (!kcontrol_news) {
+		dev_err(card->dev, "ASoC: Failed to create control for %s widget\n",
+			link_name);
+		goto outfree_w_param;
+	}
+	return kcontrol_news;
+
+outfree_w_param:
+	snd_soc_dapm_free_kcontrol(card, private_value, num_params, w_param_text);
+	return NULL;
+}
+
+static struct snd_soc_dapm_widget *
+snd_soc_dapm_new_dai(struct snd_soc_card *card,
+		     struct snd_pcm_substream *substream,
+		     char *id)
+{
+	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+	struct snd_soc_dapm_widget template;
+	struct snd_soc_dapm_widget *w;
+	const char **w_param_text;
+	unsigned long private_value = 0;
+	char *link_name;
+	int ret;
+
+	link_name = devm_kasprintf(card->dev, GFP_KERNEL, "%s-%s",
+				   rtd->dai_link->name, id);
+	if (!link_name)
+		return ERR_PTR(-ENOMEM);
+
+	memset(&template, 0, sizeof(template));
+	template.reg = SND_SOC_NOPM;
+	template.id = snd_soc_dapm_dai_link;
+	template.name = link_name;
+	template.event = snd_soc_dai_link_event;
+	template.event_flags = SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
+		SND_SOC_DAPM_PRE_PMD | SND_SOC_DAPM_POST_PMD;
+	template.kcontrol_news = NULL;
+
+	/* allocate memory for control, only in case of multiple configs */
+	if (rtd->dai_link->num_params > 1) {
+		w_param_text = devm_kcalloc(card->dev,
+					    rtd->dai_link->num_params,
+					    sizeof(char *), GFP_KERNEL);
+		if (!w_param_text) {
+			ret = -ENOMEM;
+			goto param_fail;
+		}
+
+		template.num_kcontrols = 1;
+		template.kcontrol_news =
+					snd_soc_dapm_alloc_kcontrol(card,
+						link_name,
+						rtd->dai_link->params,
+						rtd->dai_link->num_params,
+						w_param_text, &private_value);
+		if (!template.kcontrol_news) {
+			ret = -ENOMEM;
+			goto param_fail;
+		}
+	} else {
+		w_param_text = NULL;
+	}
+	dev_dbg(card->dev, "ASoC: adding %s widget\n", link_name);
+
+	w = snd_soc_dapm_new_control_unlocked(&card->dapm, &template);
+	if (IS_ERR(w)) {
+		ret = PTR_ERR(w);
+		dev_err(rtd->dev, "ASoC: Failed to create %s widget: %d\n",
+			link_name, ret);
+		goto outfree_kcontrol_news;
+	}
+
+	w->priv = substream;
+
+	return w;
+
+outfree_kcontrol_news:
+	devm_kfree(card->dev, (void *)template.kcontrol_news);
+	snd_soc_dapm_free_kcontrol(card, &private_value,
+				   rtd->dai_link->num_params, w_param_text);
+param_fail:
+	devm_kfree(card->dev, link_name);
+	return ERR_PTR(ret);
+}
+
+/**
+ * snd_soc_dapm_new_dai_widgets - Create new DAPM widgets
+ * @dapm: DAPM context
+ * @dai: parent DAI
+ *
+ * Returns 0 on success, error code otherwise.
+ */
+int snd_soc_dapm_new_dai_widgets(struct snd_soc_dapm_context *dapm,
+				 struct snd_soc_dai *dai)
+{
+	struct snd_soc_dapm_widget template;
+	struct snd_soc_dapm_widget *w;
+
+	WARN_ON(dapm->dev != dai->dev);
+
+	memset(&template, 0, sizeof(template));
+	template.reg = SND_SOC_NOPM;
+
+	if (dai->driver->playback.stream_name) {
+		template.id = snd_soc_dapm_dai_in;
+		template.name = dai->driver->playback.stream_name;
+		template.sname = dai->driver->playback.stream_name;
+
+		dev_dbg(dai->dev, "ASoC: adding %s widget\n",
+			template.name);
+
+		w = snd_soc_dapm_new_control_unlocked(dapm, &template);
+		if (IS_ERR(w))
+			return PTR_ERR(w);
+
+		w->priv = dai;
+		dai->playback_widget = w;
+	}
+
+	if (dai->driver->capture.stream_name) {
+		template.id = snd_soc_dapm_dai_out;
+		template.name = dai->driver->capture.stream_name;
+		template.sname = dai->driver->capture.stream_name;
+
+		dev_dbg(dai->dev, "ASoC: adding %s widget\n",
+			template.name);
+
+		w = snd_soc_dapm_new_control_unlocked(dapm, &template);
+		if (IS_ERR(w))
+			return PTR_ERR(w);
+
+		w->priv = dai;
+		dai->capture_widget = w;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(snd_soc_dapm_new_dai_widgets);
+
+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... */
+	for_each_card_widgets(card, dai_w) {
+		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 */
+		for_each_card_widgets(card, w) {
+			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_routes(struct snd_soc_dapm_context *dapm,
+				    struct snd_soc_dai *src_dai,
+				    struct snd_soc_dapm_widget *src,
+				    struct snd_soc_dapm_widget *dai,
+				    struct snd_soc_dai *sink_dai,
+				    struct snd_soc_dapm_widget *sink)
+{
+	dev_dbg(dapm->dev, "connected DAI link %s:%s -> %s:%s\n",
+		src_dai->component->name, src->name,
+		sink_dai->component->name, sink->name);
+
+	if (dai) {
+		snd_soc_dapm_add_path(dapm, src, dai, NULL, NULL);
+		src = dai;
+	}
+
+	snd_soc_dapm_add_path(dapm, src, sink, NULL, NULL);
+}
+
+static void dapm_connect_dai_pair(struct snd_soc_card *card,
+				  struct snd_soc_pcm_runtime *rtd,
+				  struct snd_soc_dai *codec_dai,
+				  struct snd_soc_dai *cpu_dai)
+{
+	struct snd_soc_dai_link *dai_link = rtd->dai_link;
+	struct snd_soc_dapm_widget *dai, *codec, *playback_cpu, *capture_cpu;
+	struct snd_pcm_substream *substream;
+	struct snd_pcm_str *streams = rtd->pcm->streams;
+	int stream;
+
+	if (dai_link->params) {
+		playback_cpu = cpu_dai->capture_widget;
+		capture_cpu = cpu_dai->playback_widget;
+	} else {
+		playback_cpu = cpu_dai->playback_widget;
+		capture_cpu = cpu_dai->capture_widget;
+	}
+
+	/* connect BE DAI playback if widgets are valid */
+	stream = SNDRV_PCM_STREAM_PLAYBACK;
+	codec = codec_dai->playback_widget;
+
+	if (playback_cpu && codec) {
+		if (dai_link->params && !rtd->c2c_widget[stream]) {
+			substream = streams[stream].substream;
+			dai = snd_soc_dapm_new_dai(card, substream, "playback");
+			if (IS_ERR(dai))
+				goto capture;
+			rtd->c2c_widget[stream] = dai;
+		}
+
+		dapm_connect_dai_routes(&card->dapm, cpu_dai, playback_cpu,
+					rtd->c2c_widget[stream],
+					codec_dai, codec);
+	}
+
+capture:
+	/* connect BE DAI capture if widgets are valid */
+	stream = SNDRV_PCM_STREAM_CAPTURE;
+	codec = codec_dai->capture_widget;
+
+	if (codec && capture_cpu) {
+		if (dai_link->params && !rtd->c2c_widget[stream]) {
+			substream = streams[stream].substream;
+			dai = snd_soc_dapm_new_dai(card, substream, "capture");
+			if (IS_ERR(dai))
+				return;
+			rtd->c2c_widget[stream] = dai;
+		}
+
+		dapm_connect_dai_routes(&card->dapm, codec_dai, codec,
+					rtd->c2c_widget[stream],
+					cpu_dai, capture_cpu);
+	}
+}
+
+static void soc_dapm_dai_stream_event(struct snd_soc_dai *dai, int stream,
+	int event)
+{
+	struct snd_soc_dapm_widget *w;
+
+	w = snd_soc_dai_get_widget(dai, stream);
+
+	if (w) {
+		unsigned int ep;
+
+		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;
+	struct snd_soc_dai *codec_dai;
+	int i;
+
+	/* for each BE DAI link... */
+	for_each_card_rtds(card, rtd)  {
+		/*
+		 * dynamic FE links have no fixed DAI mapping.
+		 * CODEC<->CODEC links have no direct connection.
+		 */
+		if (rtd->dai_link->dynamic)
+			continue;
+
+		if (rtd->dai_link->num_cpus == 1) {
+			for_each_rtd_codec_dais(rtd, i, codec_dai)
+				dapm_connect_dai_pair(card, rtd, codec_dai,
+						      asoc_rtd_to_cpu(rtd, 0));
+		} else if (rtd->dai_link->num_codecs == rtd->dai_link->num_cpus) {
+			for_each_rtd_codec_dais(rtd, i, codec_dai)
+				dapm_connect_dai_pair(card, rtd, codec_dai,
+						      asoc_rtd_to_cpu(rtd, i));
+		} else {
+			dev_err(card->dev,
+				"N cpus to M codecs link is not supported yet\n");
+		}
+	}
+}
+
+static void soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
+	int event)
+{
+	struct snd_soc_dai *dai;
+	int i;
+
+	for_each_rtd_dais(rtd, i, dai)
+		soc_dapm_dai_stream_event(dai, stream, event);
+
+	dapm_power_widgets(rtd->card, event);
+}
+
+/**
+ * snd_soc_dapm_stream_event - send a stream event to the dapm core
+ * @rtd: PCM runtime data
+ * @stream: stream name
+ * @event: stream event
+ *
+ * Sends a stream event to the dapm core. The core then makes any
+ * necessary widget power changes.
+ *
+ * Returns 0 for success else error.
+ */
+void snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
+			      int event)
+{
+	struct snd_soc_card *card = rtd->card;
+
+	mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
+	soc_dapm_stream_event(rtd, stream, event);
+	mutex_unlock(&card->dapm_mutex);
+}
+
+void snd_soc_dapm_stream_stop(struct snd_soc_pcm_runtime *rtd, int stream)
+{
+	if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
+		if (snd_soc_runtime_ignore_pmdown_time(rtd)) {
+			/* powered down playback stream now */
+			snd_soc_dapm_stream_event(rtd,
+						  SNDRV_PCM_STREAM_PLAYBACK,
+						  SND_SOC_DAPM_STREAM_STOP);
+		} else {
+			/* start delayed pop wq here for playback streams */
+			rtd->pop_wait = 1;
+			queue_delayed_work(system_power_efficient_wq,
+					   &rtd->delayed_work,
+					   msecs_to_jiffies(rtd->pmdown_time));
+		}
+	} else {
+		/* capture streams can be powered down now */
+		snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
+					  SND_SOC_DAPM_STREAM_STOP);
+	}
+}
+EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_stop);
+
+/**
+ * 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);
+
+void snd_soc_dapm_init(struct snd_soc_dapm_context *dapm,
+		       struct snd_soc_card *card,
+		       struct snd_soc_component *component)
+{
+	dapm->card		= card;
+	dapm->component		= component;
+	dapm->bias_level	= SND_SOC_BIAS_OFF;
+
+	if (component) {
+		dapm->dev		= component->dev;
+		dapm->idle_bias_off	= !component->driver->idle_bias_on;
+		dapm->suspend_bias_off	= component->driver->suspend_bias_off;
+	} else {
+		dapm->dev		= card->dev;
+	}
+
+	INIT_LIST_HEAD(&dapm->list);
+	/* see for_each_card_dapms */
+	list_add(&dapm->list, &card->dapm_list);
+}
+EXPORT_SYMBOL_GPL(snd_soc_dapm_init);
+
+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);
+
+	for_each_card_widgets(dapm->card, w) {
+		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;
+
+	for_each_card_dapms(card, dapm) {
+		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");