Merge branch 'topic/asoc' into for-linus

1 files changed, 285 insertions, 115 deletions

diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c
index 1315663..6241490 100644
--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -14,19 +14,13 @@
  *      dynamic configuration of codec internal audio paths and active
  *      DACs/ADCs.
  *    o Platform power domain - can support external components i.e. amps and
- *      mic/meadphone insertion events.
+ *      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 powerdown of audio susbsystem to reduce pops between a quick
+ *    o Delayed power down of audio subsystem to reduce pops between a quick
  *      device reopen.
  *
- *  Todo:
- *    o DAPM power change sequencing - allow for configurable per
- *      codec sequences.
- *    o Support for analogue bias optimisation.
- *    o Support for reduced codec oversampling rates.
- *    o Support for reduced codec bias currents.
  */
 
 #include <linux/module.h>
@@ -40,6 +34,7 @@
 #include <linux/jiffies.h>
 #include <linux/debugfs.h>
 #include <linux/pm_runtime.h>
+#include <linux/regulator/consumer.h>
 #include <linux/slab.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
@@ -55,7 +50,9 @@
 static int dapm_up_seq[] = {
 	[snd_soc_dapm_pre] = 0,
 	[snd_soc_dapm_supply] = 1,
+	[snd_soc_dapm_regulator_supply] = 1,
 	[snd_soc_dapm_micbias] = 2,
+	[snd_soc_dapm_dai] = 3,
 	[snd_soc_dapm_aif_in] = 3,
 	[snd_soc_dapm_aif_out] = 3,
 	[snd_soc_dapm_mic] = 4,
@@ -90,6 +87,8 @@ static int dapm_down_seq[] = {
 	[snd_soc_dapm_value_mux] = 9,
 	[snd_soc_dapm_aif_in] = 10,
 	[snd_soc_dapm_aif_out] = 10,
+	[snd_soc_dapm_dai] = 10,
+	[snd_soc_dapm_regulator_supply] = 11,
 	[snd_soc_dapm_supply] = 11,
 	[snd_soc_dapm_post] = 12,
 };
@@ -172,6 +171,19 @@ static inline struct snd_soc_card *dapm_get_soc_card(
 	return NULL;
 }
 
+static void dapm_reset(struct snd_soc_card *card)
+{
+	struct snd_soc_dapm_widget *w;
+
+	memset(&card->dapm_stats, 0, sizeof(card->dapm_stats));
+
+	list_for_each_entry(w, &card->widgets, list) {
+		w->power_checked = false;
+		w->inputs = -1;
+		w->outputs = -1;
+	}
+}
+
 static int soc_widget_read(struct snd_soc_dapm_widget *w, int reg)
 {
 	if (w->codec)
@@ -197,21 +209,28 @@ static int soc_widget_write(struct snd_soc_dapm_widget *w, int reg, int val)
 static int soc_widget_update_bits(struct snd_soc_dapm_widget *w,
 	unsigned short reg, unsigned int mask, unsigned int value)
 {
-	int change;
+	bool change;
 	unsigned int old, new;
 	int ret;
 
-	ret = soc_widget_read(w, reg);
-	if (ret < 0)
-		return ret;
-
-	old = ret;
-	new = (old & ~mask) | (value & mask);
-	change = old != new;
-	if (change) {
-		ret = soc_widget_write(w, reg, new);
+	if (w->codec && w->codec->using_regmap) {
+		ret = regmap_update_bits_check(w->codec->control_data,
+					       reg, mask, value, &change);
+		if (ret != 0)
+			return ret;
+	} else {
+		ret = soc_widget_read(w, reg);
 		if (ret < 0)
 			return ret;
+
+		old = ret;
+		new = (old & ~mask) | (value & mask);
+		change = old != new;
+		if (change) {
+			ret = soc_widget_write(w, reg, new);
+			if (ret < 0)
+				return ret;
+		}
 	}
 
 	return change;
@@ -345,8 +364,10 @@ static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
 	case snd_soc_dapm_micbias:
 	case snd_soc_dapm_vmid:
 	case snd_soc_dapm_supply:
+	case snd_soc_dapm_regulator_supply:
 	case snd_soc_dapm_aif_in:
 	case snd_soc_dapm_aif_out:
+	case snd_soc_dapm_dai:
 	case snd_soc_dapm_hp:
 	case snd_soc_dapm_mic:
 	case snd_soc_dapm_spk:
@@ -504,17 +525,17 @@ static int dapm_new_mixer(struct snd_soc_dapm_widget *w)
 				 * for widgets so cut the prefix off
 				 * the front of the widget name.
 				 */
-				snprintf(path->long_name, name_len, "%s %s",
-					 w->name + prefix_len,
+				snprintf((char *)path->long_name, name_len,
+					 "%s %s", w->name + prefix_len,
 					 w->kcontrol_news[i].name);
 				break;
 			case snd_soc_dapm_mixer_named_ctl:
-				snprintf(path->long_name, name_len, "%s",
-					 w->kcontrol_news[i].name);
+				snprintf((char *)path->long_name, name_len,
+					 "%s", w->kcontrol_news[i].name);
 				break;
 			}
 
-			path->long_name[name_len - 1] = '\0';
+			((char *)path->long_name)[name_len - 1] = '\0';
 
 			path->kcontrol = snd_soc_cnew(&w->kcontrol_news[i],
 						      wlist, path->long_name,
@@ -548,7 +569,7 @@ static int dapm_new_mux(struct snd_soc_dapm_widget *w)
 	struct snd_soc_dapm_widget_list *wlist;
 	int shared, wlistentries;
 	size_t wlistsize;
-	char *name;
+	const char *name;
 
 	if (w->num_kcontrols != 1) {
 		dev_err(dapm->dev,
@@ -673,12 +694,18 @@ static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
 
 	DAPM_UPDATE_STAT(widget, path_checks);
 
-	if (widget->id == snd_soc_dapm_supply)
+	switch (widget->id) {
+	case snd_soc_dapm_supply:
+	case snd_soc_dapm_regulator_supply:
 		return 0;
+	default:
+		break;
+	}
 
 	switch (widget->id) {
 	case snd_soc_dapm_adc:
 	case snd_soc_dapm_aif_out:
+	case snd_soc_dapm_dai:
 		if (widget->active) {
 			widget->outputs = snd_soc_dapm_suspend_check(widget);
 			return widget->outputs;
@@ -738,13 +765,19 @@ static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
 
 	DAPM_UPDATE_STAT(widget, path_checks);
 
-	if (widget->id == snd_soc_dapm_supply)
+	switch (widget->id) {
+	case snd_soc_dapm_supply:
+	case snd_soc_dapm_regulator_supply:
 		return 0;
+	default:
+		break;
+	}
 
 	/* active stream ? */
 	switch (widget->id) {
 	case snd_soc_dapm_dac:
 	case snd_soc_dapm_aif_in:
+	case snd_soc_dapm_dai:
 		if (widget->active) {
 			widget->inputs = snd_soc_dapm_suspend_check(widget);
 			return widget->inputs;
@@ -821,6 +854,19 @@ int dapm_reg_event(struct snd_soc_dapm_widget *w,
 }
 EXPORT_SYMBOL_GPL(dapm_reg_event);
 
+/*
+ * Handler for regulator supply widget.
+ */
+int dapm_regulator_event(struct snd_soc_dapm_widget *w,
+		   struct snd_kcontrol *kcontrol, int event)
+{
+	if (SND_SOC_DAPM_EVENT_ON(event))
+		return regulator_enable(w->priv);
+	else
+		return regulator_disable_deferred(w->priv, w->shift);
+}
+EXPORT_SYMBOL_GPL(dapm_regulator_event);
+
 static int dapm_widget_power_check(struct snd_soc_dapm_widget *w)
 {
 	if (w->power_checked)
@@ -851,6 +897,13 @@ static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
 	return out != 0 && in != 0;
 }
 
+static int dapm_dai_check_power(struct snd_soc_dapm_widget *w)
+{
+	DAPM_UPDATE_STAT(w, power_checks);
+
+	return w->active;
+}
+
 /* Check to see if an ADC has power */
 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
 {
@@ -1251,7 +1304,7 @@ static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
 			dev_err(d->dev, "Failed to turn off bias: %d\n", ret);
 
 		if (d->dev)
-			pm_runtime_put_sync(d->dev);
+			pm_runtime_put(d->dev);
 	}
 
 	/* If we just powered up then move to active bias */
@@ -1301,6 +1354,7 @@ static void dapm_widget_set_power(struct snd_soc_dapm_widget *w, bool power,
 	}
 	switch (w->id) {
 	case snd_soc_dapm_supply:
+	case snd_soc_dapm_regulator_supply:
 		/* Supplies can't affect their outputs, only their inputs */
 		break;
 	default:
@@ -1373,13 +1427,7 @@ static int dapm_power_widgets(struct snd_soc_dapm_context *dapm, int event)
 		}
 	}
 
-	memset(&card->dapm_stats, 0, sizeof(card->dapm_stats));
-
-	list_for_each_entry(w, &card->widgets, list) {
-		w->power_checked = false;
-		w->inputs = -1;
-		w->outputs = -1;
-	}
+	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
@@ -1400,10 +1448,15 @@ static int dapm_power_widgets(struct snd_soc_dapm_context *dapm, int event)
 			/* 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.
+			 * 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:
+				break;
 			case snd_soc_dapm_supply:
+			case snd_soc_dapm_regulator_supply:
 			case snd_soc_dapm_micbias:
 				if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
 					d->target_bias_level = SND_SOC_BIAS_STANDBY;
@@ -1475,6 +1528,12 @@ static int dapm_power_widgets(struct snd_soc_dapm_context *dapm, int event)
 					&async_domain);
 	async_synchronize_full_domain(&async_domain);
 
+	/* do we need to notify any clients that DAPM event is complete */
+	list_for_each_entry(d, &card->dapm_list, list) {
+		if (d->stream_event)
+			d->stream_event(d, event);
+	}
+
 	pop_dbg(dapm->dev, card->pop_time,
 		"DAPM sequencing finished, waiting %dms\n", card->pop_time);
 	pop_wait(card->pop_time);
@@ -1510,8 +1569,9 @@ static ssize_t dapm_widget_power_read_file(struct file *file,
 	out = is_connected_output_ep(w);
 	dapm_clear_walk(w->dapm);
 
-	ret = snprintf(buf, PAGE_SIZE, "%s: %s  in %d out %d",
-		       w->name, w->power ? "On" : "Off", in, out);
+	ret = snprintf(buf, PAGE_SIZE, "%s: %s%s  in %d out %d",
+		       w->name, w->power ? "On" : "Off",
+		       w->force ? " (forced)" : "", in, out);
 
 	if (w->reg >= 0)
 		ret += snprintf(buf + ret, PAGE_SIZE - ret,
@@ -1607,7 +1667,7 @@ void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
 	dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
 
 	if (!dapm->debugfs_dapm) {
-		printk(KERN_WARNING
+		dev_warn(dapm->dev,
 		       "Failed to create DAPM debugfs directory\n");
 		return;
 	}
@@ -1659,9 +1719,8 @@ static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
 #endif
 
 /* test and update the power status of a mux widget */
-static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
-				 struct snd_kcontrol *kcontrol, int change,
-				 int mux, struct soc_enum *e)
+int snd_soc_dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
+				 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e)
 {
 	struct snd_soc_dapm_path *path;
 	int found = 0;
@@ -1671,9 +1730,6 @@ static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
 	    widget->id != snd_soc_dapm_value_mux)
 		return -ENODEV;
 
-	if (!change)
-		return 0;
-
 	/* find dapm widget path assoc with kcontrol */
 	list_for_each_entry(path, &widget->dapm->card->paths, list) {
 		if (path->kcontrol != kcontrol)
@@ -1702,9 +1758,10 @@ static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(snd_soc_dapm_mux_update_power);
 
 /* test and update the power status of a mixer or switch widget */
-static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
+int snd_soc_dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
 				   struct snd_kcontrol *kcontrol, int connect)
 {
 	struct snd_soc_dapm_path *path;
@@ -1733,6 +1790,7 @@ static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(snd_soc_dapm_mixer_update_power);
 
 /* show dapm widget status in sys fs */
 static ssize_t dapm_widget_show(struct device *dev,
@@ -1762,6 +1820,7 @@ static ssize_t dapm_widget_show(struct device *dev,
 		case snd_soc_dapm_mixer:
 		case snd_soc_dapm_mixer_named_ctl:
 		case snd_soc_dapm_supply:
+		case snd_soc_dapm_regulator_supply:
 			if (w->name)
 				count += sprintf(buf + count, "%s: %s\n",
 					w->name, w->power ? "On":"Off");
@@ -1869,10 +1928,12 @@ static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
 		return -EINVAL;
 	}
 
+	if (w->connected != status)
+		dapm_mark_dirty(w, "pin configuration");
+
 	w->connected = status;
 	if (status == 0)
 		w->force = 0;
-	dapm_mark_dirty(w, "pin configuration");
 
 	return 0;
 }
@@ -2000,8 +2061,10 @@ static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
 	case snd_soc_dapm_pre:
 	case snd_soc_dapm_post:
 	case snd_soc_dapm_supply:
+	case snd_soc_dapm_regulator_supply:
 	case snd_soc_dapm_aif_in:
 	case snd_soc_dapm_aif_out:
+	case snd_soc_dapm_dai:
 		list_add(&path->list, &dapm->card->paths);
 		list_add(&path->list_sink, &wsink->sources);
 		list_add(&path->list_source, &wsource->sinks);
@@ -2315,7 +2378,7 @@ int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
 			update.val = val;
 			widget->dapm->update = &update;
 
-			dapm_mixer_update_power(widget, kcontrol, connect);
+			snd_soc_dapm_mixer_update_power(widget, kcontrol, connect);
 
 			widget->dapm->update = NULL;
 		}
@@ -2406,7 +2469,7 @@ int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
 			update.val = val;
 			widget->dapm->update = &update;
 
-			dapm_mux_update_power(widget, kcontrol, change, mux, e);
+			snd_soc_dapm_mux_update_power(widget, kcontrol, mux, e);
 
 			widget->dapm->update = NULL;
 		}
@@ -2467,8 +2530,7 @@ int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
 
 			widget->value = ucontrol->value.enumerated.item[0];
 
-			dapm_mux_update_power(widget, kcontrol, change,
-					      widget->value, e);
+			snd_soc_dapm_mux_update_power(widget, kcontrol, widget->value, e);
 		}
 	}
 
@@ -2571,7 +2633,7 @@ int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
 			update.val = val;
 			widget->dapm->update = &update;
 
-			dapm_mux_update_power(widget, kcontrol, change, mux, e);
+			snd_soc_dapm_mux_update_power(widget, kcontrol, mux, e);
 
 			widget->dapm->update = NULL;
 		}
@@ -2611,15 +2673,15 @@ EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
 				struct snd_ctl_elem_value *ucontrol)
 {
-	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
+	struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
 	const char *pin = (const char *)kcontrol->private_value;
 
-	mutex_lock(&codec->mutex);
+	mutex_lock(&card->mutex);
 
 	ucontrol->value.integer.value[0] =
-		snd_soc_dapm_get_pin_status(&codec->dapm, pin);
+		snd_soc_dapm_get_pin_status(&card->dapm, pin);
 
-	mutex_unlock(&codec->mutex);
+	mutex_unlock(&card->mutex);
 
 	return 0;
 }
@@ -2634,41 +2696,48 @@ EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
 				struct snd_ctl_elem_value *ucontrol)
 {
-	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
+	struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
 	const char *pin = (const char *)kcontrol->private_value;
 
-	mutex_lock(&codec->mutex);
+	mutex_lock(&card->mutex);
 
 	if (ucontrol->value.integer.value[0])
-		snd_soc_dapm_enable_pin(&codec->dapm, pin);
+		snd_soc_dapm_enable_pin(&card->dapm, pin);
 	else
-		snd_soc_dapm_disable_pin(&codec->dapm, pin);
+		snd_soc_dapm_disable_pin(&card->dapm, pin);
 
-	snd_soc_dapm_sync(&codec->dapm);
+	snd_soc_dapm_sync(&card->dapm);
 
-	mutex_unlock(&codec->mutex);
+	mutex_unlock(&card->mutex);
 
 	return 0;
 }
 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
 
-/**
- * snd_soc_dapm_new_control - create new dapm control
- * @dapm: DAPM context
- * @widget: widget template
- *
- * Creates a new dapm control based upon the template.
- *
- * Returns 0 for success else error.
- */
-int snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
-	const struct snd_soc_dapm_widget *widget)
+static 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;
 	size_t name_len;
+	int ret;
 
 	if ((w = dapm_cnew_widget(widget)) == NULL)
-		return -ENOMEM;
+		return NULL;
+
+	switch (w->id) {
+	case snd_soc_dapm_regulator_supply:
+		w->priv = devm_regulator_get(dapm->dev, w->name);
+		if (IS_ERR(w->priv)) {
+			ret = PTR_ERR(w->priv);
+			dev_err(dapm->dev, "Failed to request %s: %d\n",
+				w->name, ret);
+			return NULL;
+		}
+		break;
+	default:
+		break;
+	}
 
 	name_len = strlen(widget->name) + 1;
 	if (dapm->codec && dapm->codec->name_prefix)
@@ -2676,13 +2745,13 @@ int snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
 	w->name = kmalloc(name_len, GFP_KERNEL);
 	if (w->name == NULL) {
 		kfree(w);
-		return -ENOMEM;
+		return NULL;
 	}
 	if (dapm->codec && dapm->codec->name_prefix)
-		snprintf(w->name, name_len, "%s %s",
+		snprintf((char *)w->name, name_len, "%s %s",
 			dapm->codec->name_prefix, widget->name);
 	else
-		snprintf(w->name, name_len, "%s", widget->name);
+		snprintf((char *)w->name, name_len, "%s", widget->name);
 
 	switch (w->id) {
 	case snd_soc_dapm_switch:
@@ -2715,8 +2784,12 @@ int snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
 		w->power_check = dapm_generic_check_power;
 		break;
 	case snd_soc_dapm_supply:
+	case snd_soc_dapm_regulator_supply:
 		w->power_check = dapm_supply_check_power;
 		break;
+	case snd_soc_dapm_dai:
+		w->power_check = dapm_dai_check_power;
+		break;
 	default:
 		w->power_check = dapm_always_on_check_power;
 		break;
@@ -2734,9 +2807,8 @@ int snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
 
 	/* machine layer set ups unconnected pins and insertions */
 	w->connected = 1;
-	return 0;
+	return w;
 }
-EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
 
 /**
  * snd_soc_dapm_new_controls - create new dapm controls
@@ -2752,15 +2824,16 @@ int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
 	const struct snd_soc_dapm_widget *widget,
 	int num)
 {
-	int i, ret;
+	struct snd_soc_dapm_widget *w;
+	int i;
 
 	for (i = 0; i < num; i++) {
-		ret = snd_soc_dapm_new_control(dapm, widget);
-		if (ret < 0) {
+		w = snd_soc_dapm_new_control(dapm, widget);
+		if (!w) {
 			dev_err(dapm->dev,
-				"ASoC: Failed to create DAPM control %s: %d\n",
-				widget->name, ret);
-			return ret;
+				"ASoC: Failed to create DAPM control %s\n",
+				widget->name);
+			return -ENOMEM;
 		}
 		widget++;
 	}
@@ -2768,40 +2841,140 @@ int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
 }
 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
 
-static void soc_dapm_stream_event(struct snd_soc_dapm_context *dapm,
-	const char *stream, int event)
+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;
 
-	list_for_each_entry(w, &dapm->card->widgets, list)
-	{
-		if (!w->sname || w->dapm != dapm)
+	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;
+		template.name = dai->driver->playback.stream_name;
+		template.sname = dai->driver->playback.stream_name;
+
+		dev_dbg(dai->dev, "adding %s widget\n",
+			template.name);
+
+		w = snd_soc_dapm_new_control(dapm, &template);
+		if (!w) {
+			dev_err(dapm->dev, "Failed to create %s widget\n",
+				dai->driver->playback.stream_name);
+		}
+
+		w->priv = dai;
+		dai->playback_widget = w;
+	}
+
+	if (dai->driver->capture.stream_name) {
+		template.id = snd_soc_dapm_dai;
+		template.name = dai->driver->capture.stream_name;
+		template.sname = dai->driver->capture.stream_name;
+
+		dev_dbg(dai->dev, "adding %s widget\n",
+			template.name);
+
+		w = snd_soc_dapm_new_control(dapm, &template);
+		if (!w) {
+			dev_err(dapm->dev, "Failed to create %s widget\n",
+				dai->driver->capture.stream_name);
+		}
+
+		w->priv = dai;
+		dai->capture_widget = w;
+	}
+
+	return 0;
+}
+
+int snd_soc_dapm_link_dai_widgets(struct snd_soc_card *card)
+{
+	struct snd_soc_dapm_widget *dai_w, *w;
+	struct snd_soc_dai *dai;
+	struct snd_soc_dapm_route r;
+
+	memset(&r, 0, sizeof(r));
+
+	/* For each DAI widget... */
+	list_for_each_entry(dai_w, &card->widgets, list) {
+		if (dai_w->id != snd_soc_dapm_dai)
 			continue;
-		dev_vdbg(w->dapm->dev, "widget %s\n %s stream %s event %d\n",
-			w->name, w->sname, stream, event);
-		if (strstr(w->sname, stream)) {
-			dapm_mark_dirty(w, "stream event");
-			switch(event) {
-			case SND_SOC_DAPM_STREAM_START:
-				w->active = 1;
-				break;
-			case SND_SOC_DAPM_STREAM_STOP:
-				w->active = 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;
+
+		dai = dai_w->priv;
+
+		/* ...find all widgets with the same stream and link them */
+		list_for_each_entry(w, &card->widgets, list) {
+			if (w->dapm != dai_w->dapm)
+				continue;
+
+			if (w->id == snd_soc_dapm_dai)
+				continue;
+
+			if (!w->sname)
+				continue;
+
+			if (dai->driver->playback.stream_name &&
+			    strstr(w->sname,
+				   dai->driver->playback.stream_name)) {
+				r.source = dai->playback_widget->name;
+				r.sink = w->name;
+				dev_dbg(dai->dev, "%s -> %s\n",
+					 r.source, r.sink);
+
+				snd_soc_dapm_add_route(w->dapm, &r);
+			}
+
+			if (dai->driver->capture.stream_name &&
+			    strstr(w->sname,
+				   dai->driver->capture.stream_name)) {
+				r.source = w->name;
+				r.sink = dai->capture_widget->name;
+				dev_dbg(dai->dev, "%s -> %s\n",
+					r.source, r.sink);
+
+				snd_soc_dapm_add_route(w->dapm, &r);
 			}
 		}
 	}
 
-	dapm_power_widgets(dapm, event);
+	return 0;
+}
 
-	/* do we need to notify any clients that DAPM stream is complete */
-	if (dapm->stream_event)
-		dapm->stream_event(dapm, event);
+static void soc_dapm_stream_event(struct snd_soc_dapm_context *dapm,
+				  int stream, struct snd_soc_dai *dai,
+				  int event)
+{
+	struct snd_soc_dapm_widget *w;
+
+	if (stream == SNDRV_PCM_STREAM_PLAYBACK)
+		w = dai->playback_widget;
+	else
+		w = dai->capture_widget;
+
+	if (!w)
+		return;
+
+	dapm_mark_dirty(w, "stream event");
+
+	switch (event) {
+	case SND_SOC_DAPM_STREAM_START:
+		w->active = 1;
+		break;
+	case SND_SOC_DAPM_STREAM_STOP:
+		w->active = 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;
+	}
+
+	dapm_power_widgets(dapm, event);
 }
 
 /**
@@ -2815,16 +2988,13 @@ static void soc_dapm_stream_event(struct snd_soc_dapm_context *dapm,
  *
  * Returns 0 for success else error.
  */
-int snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd,
-	const char *stream, int event)
+int snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
+			      struct snd_soc_dai *dai, int event)
 {
 	struct snd_soc_codec *codec = rtd->codec;
 
-	if (stream == NULL)
-		return 0;
-
 	mutex_lock(&codec->mutex);
-	soc_dapm_stream_event(&codec->dapm, stream, event);
+	soc_dapm_stream_event(&codec->dapm, stream, dai, event);
 	mutex_unlock(&codec->mutex);
 	return 0;
 }