2 * soc-dapm.c -- ALSA SoC Dynamic Audio Power Management
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
13 * o Changes power status of internal codec blocks depending on the
14 * dynamic configuration of codec internal audio paths and active
16 * o Platform power domain - can support external components i.e. amps and
17 * mic/headphone insertion events.
18 * o Automatic Mic Bias support
19 * o Jack insertion power event initiation - e.g. hp insertion will enable
21 * o Delayed power down of audio subsystem to reduce pops between a quick
26 #include <linux/module.h>
27 #include <linux/moduleparam.h>
28 #include <linux/init.h>
29 #include <linux/async.h>
30 #include <linux/delay.h>
32 #include <linux/bitops.h>
33 #include <linux/platform_device.h>
34 #include <linux/jiffies.h>
35 #include <linux/debugfs.h>
36 #include <linux/pm_runtime.h>
37 #include <linux/regulator/consumer.h>
38 #include <linux/clk.h>
39 #include <linux/slab.h>
40 #include <sound/core.h>
41 #include <sound/pcm.h>
42 #include <sound/pcm_params.h>
43 #include <sound/soc.h>
44 #include <sound/initval.h>
46 #include <trace/events/asoc.h>
48 #define DAPM_UPDATE_STAT(widget, val) widget->dapm->card->dapm_stats.val++;
50 static int snd_soc_dapm_add_path(struct snd_soc_dapm_context *dapm,
51 struct snd_soc_dapm_widget *wsource, struct snd_soc_dapm_widget *wsink,
53 int (*connected)(struct snd_soc_dapm_widget *source,
54 struct snd_soc_dapm_widget *sink));
56 struct snd_soc_dapm_widget *
57 snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
58 const struct snd_soc_dapm_widget *widget);
60 struct snd_soc_dapm_widget *
61 snd_soc_dapm_new_control_unlocked(struct snd_soc_dapm_context *dapm,
62 const struct snd_soc_dapm_widget *widget);
64 /* dapm power sequences - make this per codec in the future */
65 static int dapm_up_seq[] = {
66 [snd_soc_dapm_pre] = 0,
67 [snd_soc_dapm_regulator_supply] = 1,
68 [snd_soc_dapm_clock_supply] = 1,
69 [snd_soc_dapm_supply] = 2,
70 [snd_soc_dapm_micbias] = 3,
71 [snd_soc_dapm_dai_link] = 2,
72 [snd_soc_dapm_dai_in] = 4,
73 [snd_soc_dapm_dai_out] = 4,
74 [snd_soc_dapm_aif_in] = 4,
75 [snd_soc_dapm_aif_out] = 4,
76 [snd_soc_dapm_mic] = 5,
77 [snd_soc_dapm_mux] = 6,
78 [snd_soc_dapm_demux] = 6,
79 [snd_soc_dapm_dac] = 7,
80 [snd_soc_dapm_switch] = 8,
81 [snd_soc_dapm_mixer] = 8,
82 [snd_soc_dapm_mixer_named_ctl] = 8,
83 [snd_soc_dapm_pga] = 9,
84 [snd_soc_dapm_adc] = 10,
85 [snd_soc_dapm_out_drv] = 11,
86 [snd_soc_dapm_hp] = 11,
87 [snd_soc_dapm_spk] = 11,
88 [snd_soc_dapm_line] = 11,
89 [snd_soc_dapm_kcontrol] = 12,
90 [snd_soc_dapm_post] = 13,
93 static int dapm_down_seq[] = {
94 [snd_soc_dapm_pre] = 0,
95 [snd_soc_dapm_kcontrol] = 1,
96 [snd_soc_dapm_adc] = 2,
97 [snd_soc_dapm_hp] = 3,
98 [snd_soc_dapm_spk] = 3,
99 [snd_soc_dapm_line] = 3,
100 [snd_soc_dapm_out_drv] = 3,
101 [snd_soc_dapm_pga] = 4,
102 [snd_soc_dapm_switch] = 5,
103 [snd_soc_dapm_mixer_named_ctl] = 5,
104 [snd_soc_dapm_mixer] = 5,
105 [snd_soc_dapm_dac] = 6,
106 [snd_soc_dapm_mic] = 7,
107 [snd_soc_dapm_micbias] = 8,
108 [snd_soc_dapm_mux] = 9,
109 [snd_soc_dapm_demux] = 9,
110 [snd_soc_dapm_aif_in] = 10,
111 [snd_soc_dapm_aif_out] = 10,
112 [snd_soc_dapm_dai_in] = 10,
113 [snd_soc_dapm_dai_out] = 10,
114 [snd_soc_dapm_dai_link] = 11,
115 [snd_soc_dapm_supply] = 12,
116 [snd_soc_dapm_clock_supply] = 13,
117 [snd_soc_dapm_regulator_supply] = 13,
118 [snd_soc_dapm_post] = 14,
121 static void dapm_assert_locked(struct snd_soc_dapm_context *dapm)
123 if (dapm->card && dapm->card->instantiated)
124 lockdep_assert_held(&dapm->card->dapm_mutex);
127 static void pop_wait(u32 pop_time)
130 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
133 static void pop_dbg(struct device *dev, u32 pop_time, const char *fmt, ...)
141 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
146 vsnprintf(buf, PAGE_SIZE, fmt, args);
147 dev_info(dev, "%s", buf);
153 static bool dapm_dirty_widget(struct snd_soc_dapm_widget *w)
155 return !list_empty(&w->dirty);
158 static void dapm_mark_dirty(struct snd_soc_dapm_widget *w, const char *reason)
160 dapm_assert_locked(w->dapm);
162 if (!dapm_dirty_widget(w)) {
163 dev_vdbg(w->dapm->dev, "Marking %s dirty due to %s\n",
165 list_add_tail(&w->dirty, &w->dapm->card->dapm_dirty);
170 * dapm_widget_invalidate_input_paths() - Invalidate the cached number of input
172 * @w: The widget for which to invalidate the cached number of input paths
174 * The function resets the cached number of inputs for the specified widget and
175 * all widgets that can be reached via outgoing paths from the widget.
177 * This function must be called if the number of input paths for a widget might
178 * have changed. E.g. if the source state of a widget changes or a path is added
179 * or activated with the widget as the sink.
181 static void dapm_widget_invalidate_input_paths(struct snd_soc_dapm_widget *w)
183 struct snd_soc_dapm_widget *sink;
184 struct snd_soc_dapm_path *p;
187 dapm_assert_locked(w->dapm);
193 list_add_tail(&w->work_list, &list);
195 list_for_each_entry(w, &list, work_list) {
196 list_for_each_entry(p, &w->sinks, list_source) {
197 if (p->is_supply || p->weak || !p->connect)
200 if (sink->inputs != -1) {
202 list_add_tail(&sink->work_list, &list);
209 * dapm_widget_invalidate_output_paths() - Invalidate the cached number of
211 * @w: The widget for which to invalidate the cached number of output paths
213 * Resets the cached number of outputs for the specified widget and all widgets
214 * that can be reached via incoming paths from the widget.
216 * This function must be called if the number of output paths for a widget might
217 * have changed. E.g. if the sink state of a widget changes or a path is added
218 * or activated with the widget as the source.
220 static void dapm_widget_invalidate_output_paths(struct snd_soc_dapm_widget *w)
222 struct snd_soc_dapm_widget *source;
223 struct snd_soc_dapm_path *p;
226 dapm_assert_locked(w->dapm);
228 if (w->outputs == -1)
232 list_add_tail(&w->work_list, &list);
234 list_for_each_entry(w, &list, work_list) {
235 list_for_each_entry(p, &w->sources, list_sink) {
236 if (p->is_supply || p->weak || !p->connect)
239 if (source->outputs != -1) {
240 source->outputs = -1;
241 list_add_tail(&source->work_list, &list);
248 * dapm_path_invalidate() - Invalidates the cached number of inputs and outputs
249 * for the widgets connected to a path
250 * @p: The path to invalidate
252 * Resets the cached number of inputs for the sink of the path and the cached
253 * number of outputs for the source of the path.
255 * This function must be called when a path is added, removed or the connected
258 static void dapm_path_invalidate(struct snd_soc_dapm_path *p)
261 * Weak paths or supply paths do not influence the number of input or
262 * output paths of their neighbors.
264 if (p->weak || p->is_supply)
268 * The number of connected endpoints is the sum of the number of
269 * connected endpoints of all neighbors. If a node with 0 connected
270 * endpoints is either connected or disconnected that sum won't change,
271 * so there is no need to re-check the path.
273 if (p->source->inputs != 0)
274 dapm_widget_invalidate_input_paths(p->sink);
275 if (p->sink->outputs != 0)
276 dapm_widget_invalidate_output_paths(p->source);
279 void dapm_mark_endpoints_dirty(struct snd_soc_card *card)
281 struct snd_soc_dapm_widget *w;
283 mutex_lock(&card->dapm_mutex);
285 list_for_each_entry(w, &card->widgets, list) {
286 if (w->is_sink || w->is_source) {
287 dapm_mark_dirty(w, "Rechecking endpoints");
289 dapm_widget_invalidate_output_paths(w);
291 dapm_widget_invalidate_input_paths(w);
295 mutex_unlock(&card->dapm_mutex);
297 EXPORT_SYMBOL_GPL(dapm_mark_endpoints_dirty);
299 /* create a new dapm widget */
300 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
301 const struct snd_soc_dapm_widget *_widget)
303 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
306 struct dapm_kcontrol_data {
308 struct snd_soc_dapm_widget *widget;
309 struct list_head paths;
310 struct snd_soc_dapm_widget_list *wlist;
313 static int dapm_kcontrol_data_alloc(struct snd_soc_dapm_widget *widget,
314 struct snd_kcontrol *kcontrol)
316 struct dapm_kcontrol_data *data;
317 struct soc_mixer_control *mc;
322 data = kzalloc(sizeof(*data), GFP_KERNEL);
326 INIT_LIST_HEAD(&data->paths);
328 switch (widget->id) {
329 case snd_soc_dapm_switch:
330 case snd_soc_dapm_mixer:
331 case snd_soc_dapm_mixer_named_ctl:
332 mc = (struct soc_mixer_control *)kcontrol->private_value;
334 if (mc->autodisable) {
335 struct snd_soc_dapm_widget template;
337 name = kasprintf(GFP_KERNEL, "%s %s", kcontrol->id.name,
344 memset(&template, 0, sizeof(template));
345 template.reg = mc->reg;
346 template.mask = (1 << fls(mc->max)) - 1;
347 template.shift = mc->shift;
349 template.off_val = mc->max;
351 template.off_val = 0;
352 template.on_val = template.off_val;
353 template.id = snd_soc_dapm_kcontrol;
354 template.name = name;
356 data->value = template.on_val;
359 snd_soc_dapm_new_control_unlocked(widget->dapm,
368 case snd_soc_dapm_demux:
369 case snd_soc_dapm_mux:
370 e = (struct soc_enum *)kcontrol->private_value;
372 if (e->autodisable) {
373 struct snd_soc_dapm_widget template;
375 name = kasprintf(GFP_KERNEL, "%s %s", kcontrol->id.name,
382 memset(&template, 0, sizeof(template));
383 template.reg = e->reg;
384 template.mask = e->mask << e->shift_l;
385 template.shift = e->shift_l;
386 template.off_val = snd_soc_enum_item_to_val(e, 0);
387 template.on_val = template.off_val;
388 template.id = snd_soc_dapm_kcontrol;
389 template.name = name;
391 data->value = template.on_val;
393 data->widget = snd_soc_dapm_new_control_unlocked(
394 widget->dapm, &template);
401 snd_soc_dapm_add_path(widget->dapm, data->widget,
409 kcontrol->private_data = data;
418 static void dapm_kcontrol_free(struct snd_kcontrol *kctl)
420 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kctl);
425 static struct snd_soc_dapm_widget_list *dapm_kcontrol_get_wlist(
426 const struct snd_kcontrol *kcontrol)
428 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
433 static int dapm_kcontrol_add_widget(struct snd_kcontrol *kcontrol,
434 struct snd_soc_dapm_widget *widget)
436 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
437 struct snd_soc_dapm_widget_list *new_wlist;
441 n = data->wlist->num_widgets + 1;
445 new_wlist = krealloc(data->wlist,
446 sizeof(*new_wlist) + sizeof(widget) * n, GFP_KERNEL);
450 new_wlist->widgets[n - 1] = widget;
451 new_wlist->num_widgets = n;
453 data->wlist = new_wlist;
458 static void dapm_kcontrol_add_path(const struct snd_kcontrol *kcontrol,
459 struct snd_soc_dapm_path *path)
461 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
463 list_add_tail(&path->list_kcontrol, &data->paths);
466 static bool dapm_kcontrol_is_powered(const struct snd_kcontrol *kcontrol)
468 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
473 return data->widget->power;
476 static struct list_head *dapm_kcontrol_get_path_list(
477 const struct snd_kcontrol *kcontrol)
479 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
484 #define dapm_kcontrol_for_each_path(path, kcontrol) \
485 list_for_each_entry(path, dapm_kcontrol_get_path_list(kcontrol), \
488 unsigned int dapm_kcontrol_get_value(const struct snd_kcontrol *kcontrol)
490 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
494 EXPORT_SYMBOL_GPL(dapm_kcontrol_get_value);
496 static bool dapm_kcontrol_set_value(const struct snd_kcontrol *kcontrol,
499 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
501 if (data->value == value)
505 data->widget->on_val = value;
513 * snd_soc_dapm_kcontrol_dapm() - Returns the dapm context associated to a
515 * @kcontrol: The kcontrol
517 * Note: This function must only be used on kcontrols that are known to have
518 * been registered for a CODEC. Otherwise the behaviour is undefined.
520 struct snd_soc_dapm_context *snd_soc_dapm_kcontrol_dapm(
521 struct snd_kcontrol *kcontrol)
523 return dapm_kcontrol_get_wlist(kcontrol)->widgets[0]->dapm;
525 EXPORT_SYMBOL_GPL(snd_soc_dapm_kcontrol_dapm);
527 static void dapm_reset(struct snd_soc_card *card)
529 struct snd_soc_dapm_widget *w;
531 lockdep_assert_held(&card->dapm_mutex);
533 memset(&card->dapm_stats, 0, sizeof(card->dapm_stats));
535 list_for_each_entry(w, &card->widgets, list) {
536 w->new_power = w->power;
537 w->power_checked = false;
541 static const char *soc_dapm_prefix(struct snd_soc_dapm_context *dapm)
543 if (!dapm->component)
545 return dapm->component->name_prefix;
548 static int soc_dapm_read(struct snd_soc_dapm_context *dapm, int reg,
551 if (!dapm->component)
553 return snd_soc_component_read(dapm->component, reg, value);
556 static int soc_dapm_update_bits(struct snd_soc_dapm_context *dapm,
557 int reg, unsigned int mask, unsigned int value)
559 if (!dapm->component)
561 return snd_soc_component_update_bits(dapm->component, reg,
565 static int soc_dapm_test_bits(struct snd_soc_dapm_context *dapm,
566 int reg, unsigned int mask, unsigned int value)
568 if (!dapm->component)
570 return snd_soc_component_test_bits(dapm->component, reg, mask, value);
573 static void soc_dapm_async_complete(struct snd_soc_dapm_context *dapm)
576 snd_soc_component_async_complete(dapm->component);
579 static struct snd_soc_dapm_widget *
580 dapm_wcache_lookup(struct snd_soc_dapm_wcache *wcache, const char *name)
582 struct snd_soc_dapm_widget *w = wcache->widget;
583 struct list_head *wlist;
588 wlist = &w->dapm->card->widgets;
590 list_for_each_entry_from(w, wlist, list) {
591 if (!strcmp(name, w->name))
602 static inline void dapm_wcache_update(struct snd_soc_dapm_wcache *wcache,
603 struct snd_soc_dapm_widget *w)
609 * snd_soc_dapm_force_bias_level() - Sets the DAPM bias level
610 * @dapm: The DAPM context for which to set the level
611 * @level: The level to set
613 * Forces the DAPM bias level to a specific state. It will call the bias level
614 * callback of DAPM context with the specified level. This will even happen if
615 * the context is already at the same level. Furthermore it will not go through
616 * the normal bias level sequencing, meaning any intermediate states between the
617 * current and the target state will not be entered.
619 * Note that the change in bias level is only temporary and the next time
620 * snd_soc_dapm_sync() is called the state will be set to the level as
621 * determined by the DAPM core. The function is mainly intended to be used to
622 * used during probe or resume from suspend to power up the device so
623 * initialization can be done, before the DAPM core takes over.
625 int snd_soc_dapm_force_bias_level(struct snd_soc_dapm_context *dapm,
626 enum snd_soc_bias_level level)
630 if (dapm->set_bias_level)
631 ret = dapm->set_bias_level(dapm, level);
634 dapm->bias_level = level;
638 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_bias_level);
641 * snd_soc_dapm_set_bias_level - set the bias level for the system
642 * @dapm: DAPM context
643 * @level: level to configure
645 * Configure the bias (power) levels for the SoC audio device.
647 * Returns 0 for success else error.
649 static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm,
650 enum snd_soc_bias_level level)
652 struct snd_soc_card *card = dapm->card;
655 trace_snd_soc_bias_level_start(card, level);
657 if (card && card->set_bias_level)
658 ret = card->set_bias_level(card, dapm, level);
662 if (!card || dapm != &card->dapm)
663 ret = snd_soc_dapm_force_bias_level(dapm, level);
668 if (card && card->set_bias_level_post)
669 ret = card->set_bias_level_post(card, dapm, level);
671 trace_snd_soc_bias_level_done(card, level);
676 /* connect mux widget to its interconnecting audio paths */
677 static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
678 struct snd_soc_dapm_path *path, const char *control_name,
679 struct snd_soc_dapm_widget *w)
681 const struct snd_kcontrol_new *kcontrol = &w->kcontrol_news[0];
682 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
683 unsigned int val, item;
686 if (e->reg != SND_SOC_NOPM) {
687 soc_dapm_read(dapm, e->reg, &val);
688 val = (val >> e->shift_l) & e->mask;
689 item = snd_soc_enum_val_to_item(e, val);
691 /* since a virtual mux has no backing registers to
692 * decide which path to connect, it will try to match
693 * with the first enumeration. This is to ensure
694 * that the default mux choice (the first) will be
695 * correctly powered up during initialization.
700 for (i = 0; i < e->items; i++) {
701 if (!(strcmp(control_name, e->texts[i]))) {
702 path->name = e->texts[i];
714 /* set up initial codec paths */
715 static void dapm_set_mixer_path_status(struct snd_soc_dapm_path *p, int i)
717 struct soc_mixer_control *mc = (struct soc_mixer_control *)
718 p->sink->kcontrol_news[i].private_value;
719 unsigned int reg = mc->reg;
720 unsigned int shift = mc->shift;
721 unsigned int max = mc->max;
722 unsigned int mask = (1 << fls(max)) - 1;
723 unsigned int invert = mc->invert;
726 if (reg != SND_SOC_NOPM) {
727 soc_dapm_read(p->sink->dapm, reg, &val);
728 val = (val >> shift) & mask;
737 /* connect mixer widget to its interconnecting audio paths */
738 static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
739 struct snd_soc_dapm_path *path, const char *control_name)
743 /* search for mixer kcontrol */
744 for (i = 0; i < path->sink->num_kcontrols; i++) {
745 if (!strcmp(control_name, path->sink->kcontrol_news[i].name)) {
746 path->name = path->sink->kcontrol_news[i].name;
747 dapm_set_mixer_path_status(path, i);
754 static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm,
755 struct snd_soc_dapm_widget *kcontrolw,
756 const struct snd_kcontrol_new *kcontrol_new,
757 struct snd_kcontrol **kcontrol)
759 struct snd_soc_dapm_widget *w;
764 list_for_each_entry(w, &dapm->card->widgets, list) {
765 if (w == kcontrolw || w->dapm != kcontrolw->dapm)
767 for (i = 0; i < w->num_kcontrols; i++) {
768 if (&w->kcontrol_news[i] == kcontrol_new) {
770 *kcontrol = w->kcontrols[i];
780 * Determine if a kcontrol is shared. If it is, look it up. If it isn't,
781 * create it. Either way, add the widget into the control's widget list
783 static int dapm_create_or_share_mixmux_kcontrol(struct snd_soc_dapm_widget *w,
786 struct snd_soc_dapm_context *dapm = w->dapm;
787 struct snd_card *card = dapm->card->snd_card;
791 struct snd_kcontrol *kcontrol;
792 bool wname_in_long_name, kcname_in_long_name;
793 char *long_name = NULL;
797 prefix = soc_dapm_prefix(dapm);
799 prefix_len = strlen(prefix) + 1;
803 shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[kci],
808 wname_in_long_name = false;
809 kcname_in_long_name = true;
812 case snd_soc_dapm_switch:
813 case snd_soc_dapm_mixer:
814 wname_in_long_name = true;
815 kcname_in_long_name = true;
817 case snd_soc_dapm_mixer_named_ctl:
818 wname_in_long_name = false;
819 kcname_in_long_name = true;
821 case snd_soc_dapm_demux:
822 case snd_soc_dapm_mux:
823 wname_in_long_name = true;
824 kcname_in_long_name = false;
831 if (wname_in_long_name && kcname_in_long_name) {
833 * The control will get a prefix from the control
834 * creation process but we're also using the same
835 * prefix for widgets so cut the prefix off the
836 * front of the widget name.
838 long_name = kasprintf(GFP_KERNEL, "%s %s",
839 w->name + prefix_len,
840 w->kcontrol_news[kci].name);
841 if (long_name == NULL)
845 } else if (wname_in_long_name) {
847 name = w->name + prefix_len;
850 name = w->kcontrol_news[kci].name;
853 kcontrol = snd_soc_cnew(&w->kcontrol_news[kci], NULL, name,
860 kcontrol->private_free = dapm_kcontrol_free;
862 ret = dapm_kcontrol_data_alloc(w, kcontrol);
864 snd_ctl_free_one(kcontrol);
868 ret = snd_ctl_add(card, kcontrol);
871 "ASoC: failed to add widget %s dapm kcontrol %s: %d\n",
877 ret = dapm_kcontrol_add_widget(kcontrol, w);
879 w->kcontrols[kci] = kcontrol;
887 /* create new dapm mixer control */
888 static int dapm_new_mixer(struct snd_soc_dapm_widget *w)
891 struct snd_soc_dapm_path *path;
892 struct dapm_kcontrol_data *data;
895 for (i = 0; i < w->num_kcontrols; i++) {
897 list_for_each_entry(path, &w->sources, list_sink) {
898 /* mixer/mux paths name must match control name */
899 if (path->name != (char *)w->kcontrol_news[i].name)
902 if (!w->kcontrols[i]) {
903 ret = dapm_create_or_share_mixmux_kcontrol(w, i);
908 dapm_kcontrol_add_path(w->kcontrols[i], path);
910 data = snd_kcontrol_chip(w->kcontrols[i]);
912 snd_soc_dapm_add_path(data->widget->dapm,
922 /* create new dapm mux control */
923 static int dapm_new_mux(struct snd_soc_dapm_widget *w)
925 struct snd_soc_dapm_context *dapm = w->dapm;
926 struct snd_soc_dapm_path *path;
927 struct list_head *paths;
932 case snd_soc_dapm_mux:
936 case snd_soc_dapm_demux:
944 if (w->num_kcontrols != 1) {
946 "ASoC: %s %s has incorrect number of controls\n", type,
951 if (list_empty(paths)) {
952 dev_err(dapm->dev, "ASoC: %s %s has no paths\n", type, w->name);
956 ret = dapm_create_or_share_mixmux_kcontrol(w, 0);
960 if (w->id == snd_soc_dapm_mux) {
961 list_for_each_entry(path, &w->sources, list_sink) {
963 dapm_kcontrol_add_path(w->kcontrols[0], path);
966 list_for_each_entry(path, &w->sinks, list_source) {
968 dapm_kcontrol_add_path(w->kcontrols[0], path);
975 /* create new dapm volume control */
976 static int dapm_new_pga(struct snd_soc_dapm_widget *w)
978 if (w->num_kcontrols)
979 dev_err(w->dapm->dev,
980 "ASoC: PGA controls not supported: '%s'\n", w->name);
985 /* create new dapm dai link control */
986 static int dapm_new_dai_link(struct snd_soc_dapm_widget *w)
989 struct snd_kcontrol *kcontrol;
990 struct snd_soc_dapm_context *dapm = w->dapm;
991 struct snd_card *card = dapm->card->snd_card;
993 /* create control for links with > 1 config */
994 if (w->num_params <= 1)
998 for (i = 0; i < w->num_kcontrols; i++) {
999 kcontrol = snd_soc_cnew(&w->kcontrol_news[i], w,
1001 ret = snd_ctl_add(card, kcontrol);
1004 "ASoC: failed to add widget %s dapm kcontrol %s: %d\n",
1005 w->name, w->kcontrol_news[i].name, ret);
1008 kcontrol->private_data = w;
1009 w->kcontrols[i] = kcontrol;
1015 /* We implement power down on suspend by checking the power state of
1016 * the ALSA card - when we are suspending the ALSA state for the card
1019 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
1021 int level = snd_power_get_state(widget->dapm->card->snd_card);
1024 case SNDRV_CTL_POWER_D3hot:
1025 case SNDRV_CTL_POWER_D3cold:
1026 if (widget->ignore_suspend)
1027 dev_dbg(widget->dapm->dev, "ASoC: %s ignoring suspend\n",
1029 return widget->ignore_suspend;
1035 static int dapm_widget_list_create(struct snd_soc_dapm_widget_list **list,
1036 struct list_head *widgets)
1038 struct snd_soc_dapm_widget *w;
1039 struct list_head *it;
1040 unsigned int size = 0;
1043 list_for_each(it, widgets)
1046 *list = kzalloc(sizeof(**list) + size * sizeof(*w), GFP_KERNEL);
1050 list_for_each_entry(w, widgets, work_list)
1051 (*list)->widgets[i++] = w;
1053 (*list)->num_widgets = i;
1059 * Recursively check for a completed path to an active or physically connected
1060 * output widget. Returns number of complete paths.
1062 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget,
1063 struct list_head *list)
1065 struct snd_soc_dapm_path *path;
1068 if (widget->outputs >= 0)
1069 return widget->outputs;
1071 DAPM_UPDATE_STAT(widget, path_checks);
1073 /* do we need to add this widget to the list ? */
1075 list_add_tail(&widget->work_list, list);
1077 if (widget->is_sink && widget->connected) {
1078 widget->outputs = snd_soc_dapm_suspend_check(widget);
1079 return widget->outputs;
1082 list_for_each_entry(path, &widget->sinks, list_source) {
1083 DAPM_UPDATE_STAT(widget, neighbour_checks);
1085 if (path->weak || path->is_supply)
1091 trace_snd_soc_dapm_output_path(widget, path);
1093 if (path->connect) {
1095 con += is_connected_output_ep(path->sink, list);
1100 widget->outputs = con;
1106 * Recursively check for a completed path to an active or physically connected
1107 * input widget. Returns number of complete paths.
1109 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget,
1110 struct list_head *list)
1112 struct snd_soc_dapm_path *path;
1115 if (widget->inputs >= 0)
1116 return widget->inputs;
1118 DAPM_UPDATE_STAT(widget, path_checks);
1120 /* do we need to add this widget to the list ? */
1122 list_add_tail(&widget->work_list, list);
1124 if (widget->is_source && widget->connected) {
1125 widget->inputs = snd_soc_dapm_suspend_check(widget);
1126 return widget->inputs;
1129 list_for_each_entry(path, &widget->sources, list_sink) {
1130 DAPM_UPDATE_STAT(widget, neighbour_checks);
1132 if (path->weak || path->is_supply)
1138 trace_snd_soc_dapm_input_path(widget, path);
1140 if (path->connect) {
1142 con += is_connected_input_ep(path->source, list);
1147 widget->inputs = con;
1153 * snd_soc_dapm_get_connected_widgets - query audio path and it's widgets.
1154 * @dai: the soc DAI.
1155 * @stream: stream direction.
1156 * @list: list of active widgets for this stream.
1158 * Queries DAPM graph as to whether an valid audio stream path exists for
1159 * the initial stream specified by name. This takes into account
1160 * current mixer and mux kcontrol settings. Creates list of valid widgets.
1162 * Returns the number of valid paths or negative error.
1164 int snd_soc_dapm_dai_get_connected_widgets(struct snd_soc_dai *dai, int stream,
1165 struct snd_soc_dapm_widget_list **list)
1167 struct snd_soc_card *card = dai->component->card;
1168 struct snd_soc_dapm_widget *w;
1173 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
1176 * For is_connected_{output,input}_ep fully discover the graph we need
1177 * to reset the cached number of inputs and outputs.
1179 list_for_each_entry(w, &card->widgets, list) {
1184 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1185 paths = is_connected_output_ep(dai->playback_widget, &widgets);
1187 paths = is_connected_input_ep(dai->capture_widget, &widgets);
1189 /* Drop starting point */
1190 list_del(widgets.next);
1192 ret = dapm_widget_list_create(list, &widgets);
1196 trace_snd_soc_dapm_connected(paths, stream);
1197 mutex_unlock(&card->dapm_mutex);
1203 * Handler for regulator supply widget.
1205 int dapm_regulator_event(struct snd_soc_dapm_widget *w,
1206 struct snd_kcontrol *kcontrol, int event)
1210 soc_dapm_async_complete(w->dapm);
1212 if (SND_SOC_DAPM_EVENT_ON(event)) {
1213 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
1214 ret = regulator_allow_bypass(w->regulator, false);
1216 dev_warn(w->dapm->dev,
1217 "ASoC: Failed to unbypass %s: %d\n",
1221 return regulator_enable(w->regulator);
1223 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
1224 ret = regulator_allow_bypass(w->regulator, true);
1226 dev_warn(w->dapm->dev,
1227 "ASoC: Failed to bypass %s: %d\n",
1231 return regulator_disable_deferred(w->regulator, w->shift);
1234 EXPORT_SYMBOL_GPL(dapm_regulator_event);
1237 * Handler for clock supply widget.
1239 int dapm_clock_event(struct snd_soc_dapm_widget *w,
1240 struct snd_kcontrol *kcontrol, int event)
1245 soc_dapm_async_complete(w->dapm);
1247 #ifdef CONFIG_HAVE_CLK
1248 if (SND_SOC_DAPM_EVENT_ON(event)) {
1249 return clk_prepare_enable(w->clk);
1251 clk_disable_unprepare(w->clk);
1257 EXPORT_SYMBOL_GPL(dapm_clock_event);
1259 static int dapm_widget_power_check(struct snd_soc_dapm_widget *w)
1261 if (w->power_checked)
1262 return w->new_power;
1267 w->new_power = w->power_check(w);
1269 w->power_checked = true;
1271 return w->new_power;
1274 /* Generic check to see if a widget should be powered.
1276 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
1280 DAPM_UPDATE_STAT(w, power_checks);
1282 in = is_connected_input_ep(w, NULL);
1283 out = is_connected_output_ep(w, NULL);
1284 return out != 0 && in != 0;
1287 /* Check to see if a power supply is needed */
1288 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
1290 struct snd_soc_dapm_path *path;
1292 DAPM_UPDATE_STAT(w, power_checks);
1294 /* Check if one of our outputs is connected */
1295 list_for_each_entry(path, &w->sinks, list_source) {
1296 DAPM_UPDATE_STAT(w, neighbour_checks);
1301 if (path->connected &&
1302 !path->connected(path->source, path->sink))
1305 if (dapm_widget_power_check(path->sink))
1312 static int dapm_always_on_check_power(struct snd_soc_dapm_widget *w)
1317 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
1318 struct snd_soc_dapm_widget *b,
1326 sort = dapm_down_seq;
1328 if (sort[a->id] != sort[b->id])
1329 return sort[a->id] - sort[b->id];
1330 if (a->subseq != b->subseq) {
1332 return a->subseq - b->subseq;
1334 return b->subseq - a->subseq;
1336 if (a->reg != b->reg)
1337 return a->reg - b->reg;
1338 if (a->dapm != b->dapm)
1339 return (unsigned long)a->dapm - (unsigned long)b->dapm;
1344 /* Insert a widget in order into a DAPM power sequence. */
1345 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
1346 struct list_head *list,
1349 struct snd_soc_dapm_widget *w;
1351 list_for_each_entry(w, list, power_list)
1352 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
1353 list_add_tail(&new_widget->power_list, &w->power_list);
1357 list_add_tail(&new_widget->power_list, list);
1360 static void dapm_seq_check_event(struct snd_soc_card *card,
1361 struct snd_soc_dapm_widget *w, int event)
1363 const char *ev_name;
1367 case SND_SOC_DAPM_PRE_PMU:
1368 ev_name = "PRE_PMU";
1371 case SND_SOC_DAPM_POST_PMU:
1372 ev_name = "POST_PMU";
1375 case SND_SOC_DAPM_PRE_PMD:
1376 ev_name = "PRE_PMD";
1379 case SND_SOC_DAPM_POST_PMD:
1380 ev_name = "POST_PMD";
1383 case SND_SOC_DAPM_WILL_PMU:
1384 ev_name = "WILL_PMU";
1387 case SND_SOC_DAPM_WILL_PMD:
1388 ev_name = "WILL_PMD";
1392 WARN(1, "Unknown event %d\n", event);
1396 if (w->new_power != power)
1399 if (w->event && (w->event_flags & event)) {
1400 pop_dbg(w->dapm->dev, card->pop_time, "pop test : %s %s\n",
1402 soc_dapm_async_complete(w->dapm);
1403 trace_snd_soc_dapm_widget_event_start(w, event);
1404 ret = w->event(w, NULL, event);
1405 trace_snd_soc_dapm_widget_event_done(w, event);
1407 dev_err(w->dapm->dev, "ASoC: %s: %s event failed: %d\n",
1408 ev_name, w->name, ret);
1412 /* Apply the coalesced changes from a DAPM sequence */
1413 static void dapm_seq_run_coalesced(struct snd_soc_card *card,
1414 struct list_head *pending)
1416 struct snd_soc_dapm_context *dapm;
1417 struct snd_soc_dapm_widget *w;
1419 unsigned int value = 0;
1420 unsigned int mask = 0;
1422 w = list_first_entry(pending, struct snd_soc_dapm_widget, power_list);
1426 list_for_each_entry(w, pending, power_list) {
1427 WARN_ON(reg != w->reg || dapm != w->dapm);
1428 w->power = w->new_power;
1430 mask |= w->mask << w->shift;
1432 value |= w->on_val << w->shift;
1434 value |= w->off_val << w->shift;
1436 pop_dbg(dapm->dev, card->pop_time,
1437 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
1438 w->name, reg, value, mask);
1440 /* Check for events */
1441 dapm_seq_check_event(card, w, SND_SOC_DAPM_PRE_PMU);
1442 dapm_seq_check_event(card, w, SND_SOC_DAPM_PRE_PMD);
1446 /* Any widget will do, they should all be updating the
1450 pop_dbg(dapm->dev, card->pop_time,
1451 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
1452 value, mask, reg, card->pop_time);
1453 pop_wait(card->pop_time);
1454 soc_dapm_update_bits(dapm, reg, mask, value);
1457 list_for_each_entry(w, pending, power_list) {
1458 dapm_seq_check_event(card, w, SND_SOC_DAPM_POST_PMU);
1459 dapm_seq_check_event(card, w, SND_SOC_DAPM_POST_PMD);
1463 /* Apply a DAPM power sequence.
1465 * We walk over a pre-sorted list of widgets to apply power to. In
1466 * order to minimise the number of writes to the device required
1467 * multiple widgets will be updated in a single write where possible.
1468 * Currently anything that requires more than a single write is not
1471 static void dapm_seq_run(struct snd_soc_card *card,
1472 struct list_head *list, int event, bool power_up)
1474 struct snd_soc_dapm_widget *w, *n;
1475 struct snd_soc_dapm_context *d;
1478 int cur_subseq = -1;
1479 int cur_reg = SND_SOC_NOPM;
1480 struct snd_soc_dapm_context *cur_dapm = NULL;
1487 sort = dapm_down_seq;
1489 list_for_each_entry_safe(w, n, list, power_list) {
1492 /* Do we need to apply any queued changes? */
1493 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
1494 w->dapm != cur_dapm || w->subseq != cur_subseq) {
1495 if (!list_empty(&pending))
1496 dapm_seq_run_coalesced(card, &pending);
1498 if (cur_dapm && cur_dapm->seq_notifier) {
1499 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1500 if (sort[i] == cur_sort)
1501 cur_dapm->seq_notifier(cur_dapm,
1506 if (cur_dapm && w->dapm != cur_dapm)
1507 soc_dapm_async_complete(cur_dapm);
1509 INIT_LIST_HEAD(&pending);
1511 cur_subseq = INT_MIN;
1512 cur_reg = SND_SOC_NOPM;
1517 case snd_soc_dapm_pre:
1519 list_for_each_entry_safe_continue(w, n, list,
1522 if (event == SND_SOC_DAPM_STREAM_START)
1524 NULL, SND_SOC_DAPM_PRE_PMU);
1525 else if (event == SND_SOC_DAPM_STREAM_STOP)
1527 NULL, SND_SOC_DAPM_PRE_PMD);
1530 case snd_soc_dapm_post:
1532 list_for_each_entry_safe_continue(w, n, list,
1535 if (event == SND_SOC_DAPM_STREAM_START)
1537 NULL, SND_SOC_DAPM_POST_PMU);
1538 else if (event == SND_SOC_DAPM_STREAM_STOP)
1540 NULL, SND_SOC_DAPM_POST_PMD);
1544 /* Queue it up for application */
1545 cur_sort = sort[w->id];
1546 cur_subseq = w->subseq;
1549 list_move(&w->power_list, &pending);
1554 dev_err(w->dapm->dev,
1555 "ASoC: Failed to apply widget power: %d\n", ret);
1558 if (!list_empty(&pending))
1559 dapm_seq_run_coalesced(card, &pending);
1561 if (cur_dapm && cur_dapm->seq_notifier) {
1562 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1563 if (sort[i] == cur_sort)
1564 cur_dapm->seq_notifier(cur_dapm,
1568 list_for_each_entry(d, &card->dapm_list, list) {
1569 soc_dapm_async_complete(d);
1573 static void dapm_widget_update(struct snd_soc_card *card)
1575 struct snd_soc_dapm_update *update = card->update;
1576 struct snd_soc_dapm_widget_list *wlist;
1577 struct snd_soc_dapm_widget *w = NULL;
1581 if (!update || !dapm_kcontrol_is_powered(update->kcontrol))
1584 wlist = dapm_kcontrol_get_wlist(update->kcontrol);
1586 for (wi = 0; wi < wlist->num_widgets; wi++) {
1587 w = wlist->widgets[wi];
1589 if (w->event && (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
1590 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
1592 dev_err(w->dapm->dev, "ASoC: %s DAPM pre-event failed: %d\n",
1600 ret = soc_dapm_update_bits(w->dapm, update->reg, update->mask,
1603 dev_err(w->dapm->dev, "ASoC: %s DAPM update failed: %d\n",
1606 for (wi = 0; wi < wlist->num_widgets; wi++) {
1607 w = wlist->widgets[wi];
1609 if (w->event && (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1610 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1612 dev_err(w->dapm->dev, "ASoC: %s DAPM post-event failed: %d\n",
1618 /* Async callback run prior to DAPM sequences - brings to _PREPARE if
1619 * they're changing state.
1621 static void dapm_pre_sequence_async(void *data, async_cookie_t cookie)
1623 struct snd_soc_dapm_context *d = data;
1626 /* If we're off and we're not supposed to be go into STANDBY */
1627 if (d->bias_level == SND_SOC_BIAS_OFF &&
1628 d->target_bias_level != SND_SOC_BIAS_OFF) {
1630 pm_runtime_get_sync(d->dev);
1632 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1635 "ASoC: Failed to turn on bias: %d\n", ret);
1638 /* Prepare for a transition to ON or away from ON */
1639 if ((d->target_bias_level == SND_SOC_BIAS_ON &&
1640 d->bias_level != SND_SOC_BIAS_ON) ||
1641 (d->target_bias_level != SND_SOC_BIAS_ON &&
1642 d->bias_level == SND_SOC_BIAS_ON)) {
1643 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);
1646 "ASoC: Failed to prepare bias: %d\n", ret);
1650 /* Async callback run prior to DAPM sequences - brings to their final
1653 static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
1655 struct snd_soc_dapm_context *d = data;
1658 /* If we just powered the last thing off drop to standby bias */
1659 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1660 (d->target_bias_level == SND_SOC_BIAS_STANDBY ||
1661 d->target_bias_level == SND_SOC_BIAS_OFF)) {
1662 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1664 dev_err(d->dev, "ASoC: Failed to apply standby bias: %d\n",
1668 /* If we're in standby and can support bias off then do that */
1669 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1670 d->target_bias_level == SND_SOC_BIAS_OFF) {
1671 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);
1673 dev_err(d->dev, "ASoC: Failed to turn off bias: %d\n",
1677 pm_runtime_put(d->dev);
1680 /* If we just powered up then move to active bias */
1681 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1682 d->target_bias_level == SND_SOC_BIAS_ON) {
1683 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);
1685 dev_err(d->dev, "ASoC: Failed to apply active bias: %d\n",
1690 static void dapm_widget_set_peer_power(struct snd_soc_dapm_widget *peer,
1691 bool power, bool connect)
1693 /* If a connection is being made or broken then that update
1694 * will have marked the peer dirty, otherwise the widgets are
1695 * not connected and this update has no impact. */
1699 /* If the peer is already in the state we're moving to then we
1700 * won't have an impact on it. */
1701 if (power != peer->power)
1702 dapm_mark_dirty(peer, "peer state change");
1705 static void dapm_widget_set_power(struct snd_soc_dapm_widget *w, bool power,
1706 struct list_head *up_list,
1707 struct list_head *down_list)
1709 struct snd_soc_dapm_path *path;
1711 if (w->power == power)
1714 trace_snd_soc_dapm_widget_power(w, power);
1716 /* If we changed our power state perhaps our neigbours changed
1719 list_for_each_entry(path, &w->sources, list_sink)
1720 dapm_widget_set_peer_power(path->source, power, path->connect);
1722 /* Supplies can't affect their outputs, only their inputs */
1723 if (!w->is_supply) {
1724 list_for_each_entry(path, &w->sinks, list_source)
1725 dapm_widget_set_peer_power(path->sink, power,
1730 dapm_seq_insert(w, up_list, true);
1732 dapm_seq_insert(w, down_list, false);
1735 static void dapm_power_one_widget(struct snd_soc_dapm_widget *w,
1736 struct list_head *up_list,
1737 struct list_head *down_list)
1742 case snd_soc_dapm_pre:
1743 dapm_seq_insert(w, down_list, false);
1745 case snd_soc_dapm_post:
1746 dapm_seq_insert(w, up_list, true);
1750 power = dapm_widget_power_check(w);
1752 dapm_widget_set_power(w, power, up_list, down_list);
1757 static bool dapm_idle_bias_off(struct snd_soc_dapm_context *dapm)
1759 if (dapm->idle_bias_off)
1762 switch (snd_power_get_state(dapm->card->snd_card)) {
1763 case SNDRV_CTL_POWER_D3hot:
1764 case SNDRV_CTL_POWER_D3cold:
1765 return dapm->suspend_bias_off;
1774 * Scan each dapm widget for complete audio path.
1775 * A complete path is a route that has valid endpoints i.e.:-
1777 * o DAC to output pin.
1778 * o Input Pin to ADC.
1779 * o Input pin to Output pin (bypass, sidetone)
1780 * o DAC to ADC (loopback).
1782 static int dapm_power_widgets(struct snd_soc_card *card, int event)
1784 struct snd_soc_dapm_widget *w;
1785 struct snd_soc_dapm_context *d;
1787 LIST_HEAD(down_list);
1788 ASYNC_DOMAIN_EXCLUSIVE(async_domain);
1789 enum snd_soc_bias_level bias;
1791 lockdep_assert_held(&card->dapm_mutex);
1793 trace_snd_soc_dapm_start(card);
1795 list_for_each_entry(d, &card->dapm_list, list) {
1796 if (dapm_idle_bias_off(d))
1797 d->target_bias_level = SND_SOC_BIAS_OFF;
1799 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1804 /* Check which widgets we need to power and store them in
1805 * lists indicating if they should be powered up or down. We
1806 * only check widgets that have been flagged as dirty but note
1807 * that new widgets may be added to the dirty list while we
1810 list_for_each_entry(w, &card->dapm_dirty, dirty) {
1811 dapm_power_one_widget(w, &up_list, &down_list);
1814 list_for_each_entry(w, &card->widgets, list) {
1816 case snd_soc_dapm_pre:
1817 case snd_soc_dapm_post:
1818 /* These widgets always need to be powered */
1821 list_del_init(&w->dirty);
1828 /* Supplies and micbiases only bring the
1829 * context up to STANDBY as unless something
1830 * else is active and passing audio they
1831 * generally don't require full power. Signal
1832 * generators are virtual pins and have no
1833 * power impact themselves.
1836 case snd_soc_dapm_siggen:
1837 case snd_soc_dapm_vmid:
1839 case snd_soc_dapm_supply:
1840 case snd_soc_dapm_regulator_supply:
1841 case snd_soc_dapm_clock_supply:
1842 case snd_soc_dapm_micbias:
1843 if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
1844 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1847 d->target_bias_level = SND_SOC_BIAS_ON;
1854 /* Force all contexts in the card to the same bias state if
1855 * they're not ground referenced.
1857 bias = SND_SOC_BIAS_OFF;
1858 list_for_each_entry(d, &card->dapm_list, list)
1859 if (d->target_bias_level > bias)
1860 bias = d->target_bias_level;
1861 list_for_each_entry(d, &card->dapm_list, list)
1862 if (!dapm_idle_bias_off(d))
1863 d->target_bias_level = bias;
1865 trace_snd_soc_dapm_walk_done(card);
1867 /* Run card bias changes at first */
1868 dapm_pre_sequence_async(&card->dapm, 0);
1869 /* Run other bias changes in parallel */
1870 list_for_each_entry(d, &card->dapm_list, list) {
1871 if (d != &card->dapm)
1872 async_schedule_domain(dapm_pre_sequence_async, d,
1875 async_synchronize_full_domain(&async_domain);
1877 list_for_each_entry(w, &down_list, power_list) {
1878 dapm_seq_check_event(card, w, SND_SOC_DAPM_WILL_PMD);
1881 list_for_each_entry(w, &up_list, power_list) {
1882 dapm_seq_check_event(card, w, SND_SOC_DAPM_WILL_PMU);
1885 /* Power down widgets first; try to avoid amplifying pops. */
1886 dapm_seq_run(card, &down_list, event, false);
1888 dapm_widget_update(card);
1891 dapm_seq_run(card, &up_list, event, true);
1893 /* Run all the bias changes in parallel */
1894 list_for_each_entry(d, &card->dapm_list, list) {
1895 if (d != &card->dapm)
1896 async_schedule_domain(dapm_post_sequence_async, d,
1899 async_synchronize_full_domain(&async_domain);
1900 /* Run card bias changes at last */
1901 dapm_post_sequence_async(&card->dapm, 0);
1903 /* do we need to notify any clients that DAPM event is complete */
1904 list_for_each_entry(d, &card->dapm_list, list) {
1905 if (d->stream_event)
1906 d->stream_event(d, event);
1909 pop_dbg(card->dev, card->pop_time,
1910 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
1911 pop_wait(card->pop_time);
1913 trace_snd_soc_dapm_done(card);
1918 #ifdef CONFIG_DEBUG_FS
1919 static ssize_t dapm_widget_power_read_file(struct file *file,
1920 char __user *user_buf,
1921 size_t count, loff_t *ppos)
1923 struct snd_soc_dapm_widget *w = file->private_data;
1924 struct snd_soc_card *card = w->dapm->card;
1928 struct snd_soc_dapm_path *p = NULL;
1930 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1934 mutex_lock(&card->dapm_mutex);
1936 /* Supply widgets are not handled by is_connected_{input,output}_ep() */
1941 in = is_connected_input_ep(w, NULL);
1942 out = is_connected_output_ep(w, NULL);
1945 ret = snprintf(buf, PAGE_SIZE, "%s: %s%s in %d out %d",
1946 w->name, w->power ? "On" : "Off",
1947 w->force ? " (forced)" : "", in, out);
1950 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1951 " - R%d(0x%x) mask 0x%x",
1952 w->reg, w->reg, w->mask << w->shift);
1954 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1957 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1959 w->active ? "active" : "inactive");
1961 list_for_each_entry(p, &w->sources, list_sink) {
1962 if (p->connected && !p->connected(w, p->source))
1966 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1967 " in \"%s\" \"%s\"\n",
1968 p->name ? p->name : "static",
1971 list_for_each_entry(p, &w->sinks, list_source) {
1972 if (p->connected && !p->connected(w, p->sink))
1976 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1977 " out \"%s\" \"%s\"\n",
1978 p->name ? p->name : "static",
1982 mutex_unlock(&card->dapm_mutex);
1984 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1990 static const struct file_operations dapm_widget_power_fops = {
1991 .open = simple_open,
1992 .read = dapm_widget_power_read_file,
1993 .llseek = default_llseek,
1996 static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
1997 size_t count, loff_t *ppos)
1999 struct snd_soc_dapm_context *dapm = file->private_data;
2002 switch (dapm->bias_level) {
2003 case SND_SOC_BIAS_ON:
2006 case SND_SOC_BIAS_PREPARE:
2007 level = "Prepare\n";
2009 case SND_SOC_BIAS_STANDBY:
2010 level = "Standby\n";
2012 case SND_SOC_BIAS_OFF:
2016 WARN(1, "Unknown bias_level %d\n", dapm->bias_level);
2017 level = "Unknown\n";
2021 return simple_read_from_buffer(user_buf, count, ppos, level,
2025 static const struct file_operations dapm_bias_fops = {
2026 .open = simple_open,
2027 .read = dapm_bias_read_file,
2028 .llseek = default_llseek,
2031 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
2032 struct dentry *parent)
2039 dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
2041 if (!dapm->debugfs_dapm) {
2043 "ASoC: Failed to create DAPM debugfs directory\n");
2047 d = debugfs_create_file("bias_level", 0444,
2048 dapm->debugfs_dapm, dapm,
2052 "ASoC: Failed to create bias level debugfs file\n");
2055 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
2057 struct snd_soc_dapm_context *dapm = w->dapm;
2060 if (!dapm->debugfs_dapm || !w->name)
2063 d = debugfs_create_file(w->name, 0444,
2064 dapm->debugfs_dapm, w,
2065 &dapm_widget_power_fops);
2067 dev_warn(w->dapm->dev,
2068 "ASoC: Failed to create %s debugfs file\n",
2072 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
2074 debugfs_remove_recursive(dapm->debugfs_dapm);
2078 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
2079 struct dentry *parent)
2083 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
2087 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
2094 * soc_dapm_connect_path() - Connects or disconnects a path
2095 * @path: The path to update
2096 * @connect: The new connect state of the path. True if the path is connected,
2097 * false if it is disconneted.
2098 * @reason: The reason why the path changed (for debugging only)
2100 static void soc_dapm_connect_path(struct snd_soc_dapm_path *path,
2101 bool connect, const char *reason)
2103 if (path->connect == connect)
2106 path->connect = connect;
2107 dapm_mark_dirty(path->source, reason);
2108 dapm_mark_dirty(path->sink, reason);
2109 dapm_path_invalidate(path);
2112 /* test and update the power status of a mux widget */
2113 static int soc_dapm_mux_update_power(struct snd_soc_card *card,
2114 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e)
2116 struct snd_soc_dapm_path *path;
2120 lockdep_assert_held(&card->dapm_mutex);
2122 /* find dapm widget path assoc with kcontrol */
2123 dapm_kcontrol_for_each_path(path, kcontrol) {
2125 /* we now need to match the string in the enum to the path */
2126 if (!(strcmp(path->name, e->texts[mux])))
2131 soc_dapm_connect_path(path, connect, "mux update");
2135 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2140 int snd_soc_dapm_mux_update_power(struct snd_soc_dapm_context *dapm,
2141 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e,
2142 struct snd_soc_dapm_update *update)
2144 struct snd_soc_card *card = dapm->card;
2147 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2148 card->update = update;
2149 ret = soc_dapm_mux_update_power(card, kcontrol, mux, e);
2150 card->update = NULL;
2151 mutex_unlock(&card->dapm_mutex);
2153 soc_dpcm_runtime_update(card);
2156 EXPORT_SYMBOL_GPL(snd_soc_dapm_mux_update_power);
2158 /* test and update the power status of a mixer or switch widget */
2159 static int soc_dapm_mixer_update_power(struct snd_soc_card *card,
2160 struct snd_kcontrol *kcontrol, int connect)
2162 struct snd_soc_dapm_path *path;
2165 lockdep_assert_held(&card->dapm_mutex);
2167 /* find dapm widget path assoc with kcontrol */
2168 dapm_kcontrol_for_each_path(path, kcontrol) {
2170 soc_dapm_connect_path(path, connect, "mixer update");
2174 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2179 int snd_soc_dapm_mixer_update_power(struct snd_soc_dapm_context *dapm,
2180 struct snd_kcontrol *kcontrol, int connect,
2181 struct snd_soc_dapm_update *update)
2183 struct snd_soc_card *card = dapm->card;
2186 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2187 card->update = update;
2188 ret = soc_dapm_mixer_update_power(card, kcontrol, connect);
2189 card->update = NULL;
2190 mutex_unlock(&card->dapm_mutex);
2192 soc_dpcm_runtime_update(card);
2195 EXPORT_SYMBOL_GPL(snd_soc_dapm_mixer_update_power);
2197 static ssize_t dapm_widget_show_codec(struct snd_soc_codec *codec, char *buf)
2199 struct snd_soc_dapm_widget *w;
2201 char *state = "not set";
2203 list_for_each_entry(w, &codec->component.card->widgets, list) {
2204 if (w->dapm != &codec->dapm)
2207 /* only display widgets that burnm power */
2209 case snd_soc_dapm_hp:
2210 case snd_soc_dapm_mic:
2211 case snd_soc_dapm_spk:
2212 case snd_soc_dapm_line:
2213 case snd_soc_dapm_micbias:
2214 case snd_soc_dapm_dac:
2215 case snd_soc_dapm_adc:
2216 case snd_soc_dapm_pga:
2217 case snd_soc_dapm_out_drv:
2218 case snd_soc_dapm_mixer:
2219 case snd_soc_dapm_mixer_named_ctl:
2220 case snd_soc_dapm_supply:
2221 case snd_soc_dapm_regulator_supply:
2222 case snd_soc_dapm_clock_supply:
2224 count += sprintf(buf + count, "%s: %s\n",
2225 w->name, w->power ? "On":"Off");
2232 switch (codec->dapm.bias_level) {
2233 case SND_SOC_BIAS_ON:
2236 case SND_SOC_BIAS_PREPARE:
2239 case SND_SOC_BIAS_STANDBY:
2242 case SND_SOC_BIAS_OFF:
2246 count += sprintf(buf + count, "PM State: %s\n", state);
2251 /* show dapm widget status in sys fs */
2252 static ssize_t dapm_widget_show(struct device *dev,
2253 struct device_attribute *attr, char *buf)
2255 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
2258 mutex_lock(&rtd->card->dapm_mutex);
2260 for (i = 0; i < rtd->num_codecs; i++) {
2261 struct snd_soc_codec *codec = rtd->codec_dais[i]->codec;
2262 count += dapm_widget_show_codec(codec, buf + count);
2265 mutex_unlock(&rtd->card->dapm_mutex);
2270 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
2272 struct attribute *soc_dapm_dev_attrs[] = {
2273 &dev_attr_dapm_widget.attr,
2277 static void dapm_free_path(struct snd_soc_dapm_path *path)
2279 list_del(&path->list_sink);
2280 list_del(&path->list_source);
2281 list_del(&path->list_kcontrol);
2282 list_del(&path->list);
2286 void snd_soc_dapm_free_widget(struct snd_soc_dapm_widget *w)
2288 struct snd_soc_dapm_path *p, *next_p;
2292 * remove source and sink paths associated to this widget.
2293 * While removing the path, remove reference to it from both
2294 * source and sink widgets so that path is removed only once.
2296 list_for_each_entry_safe(p, next_p, &w->sources, list_sink)
2299 list_for_each_entry_safe(p, next_p, &w->sinks, list_source)
2302 kfree(w->kcontrols);
2303 kfree_const(w->name);
2307 /* free all dapm widgets and resources */
2308 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
2310 struct snd_soc_dapm_widget *w, *next_w;
2312 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
2313 if (w->dapm != dapm)
2315 snd_soc_dapm_free_widget(w);
2319 static struct snd_soc_dapm_widget *dapm_find_widget(
2320 struct snd_soc_dapm_context *dapm, const char *pin,
2321 bool search_other_contexts)
2323 struct snd_soc_dapm_widget *w;
2324 struct snd_soc_dapm_widget *fallback = NULL;
2326 list_for_each_entry(w, &dapm->card->widgets, list) {
2327 if (!strcmp(w->name, pin)) {
2328 if (w->dapm == dapm)
2335 if (search_other_contexts)
2341 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
2342 const char *pin, int status)
2344 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2346 dapm_assert_locked(dapm);
2349 dev_err(dapm->dev, "ASoC: DAPM unknown pin %s\n", pin);
2353 if (w->connected != status) {
2354 dapm_mark_dirty(w, "pin configuration");
2355 dapm_widget_invalidate_input_paths(w);
2356 dapm_widget_invalidate_output_paths(w);
2359 w->connected = status;
2367 * snd_soc_dapm_sync_unlocked - scan and power dapm paths
2368 * @dapm: DAPM context
2370 * Walks all dapm audio paths and powers widgets according to their
2371 * stream or path usage.
2373 * Requires external locking.
2375 * Returns 0 for success.
2377 int snd_soc_dapm_sync_unlocked(struct snd_soc_dapm_context *dapm)
2380 * Suppress early reports (eg, jacks syncing their state) to avoid
2381 * silly DAPM runs during card startup.
2383 if (!dapm->card || !dapm->card->instantiated)
2386 return dapm_power_widgets(dapm->card, SND_SOC_DAPM_STREAM_NOP);
2388 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync_unlocked);
2391 * snd_soc_dapm_sync - scan and power dapm paths
2392 * @dapm: DAPM context
2394 * Walks all dapm audio paths and powers widgets according to their
2395 * stream or path usage.
2397 * Returns 0 for success.
2399 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
2403 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2404 ret = snd_soc_dapm_sync_unlocked(dapm);
2405 mutex_unlock(&dapm->card->dapm_mutex);
2408 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
2411 * dapm_update_widget_flags() - Re-compute widget sink and source flags
2412 * @w: The widget for which to update the flags
2414 * Some widgets have a dynamic category which depends on which neighbors they
2415 * are connected to. This function update the category for these widgets.
2417 * This function must be called whenever a path is added or removed to a widget.
2419 static void dapm_update_widget_flags(struct snd_soc_dapm_widget *w)
2421 struct snd_soc_dapm_path *p;
2424 case snd_soc_dapm_input:
2425 /* On a fully routed card a input is never a source */
2426 if (w->dapm->card->fully_routed)
2429 list_for_each_entry(p, &w->sources, list_sink) {
2430 if (p->source->id == snd_soc_dapm_micbias ||
2431 p->source->id == snd_soc_dapm_mic ||
2432 p->source->id == snd_soc_dapm_line ||
2433 p->source->id == snd_soc_dapm_output) {
2439 case snd_soc_dapm_output:
2440 /* On a fully routed card a output is never a sink */
2441 if (w->dapm->card->fully_routed)
2444 list_for_each_entry(p, &w->sinks, list_source) {
2445 if (p->sink->id == snd_soc_dapm_spk ||
2446 p->sink->id == snd_soc_dapm_hp ||
2447 p->sink->id == snd_soc_dapm_line ||
2448 p->sink->id == snd_soc_dapm_input) {
2454 case snd_soc_dapm_line:
2455 w->is_sink = !list_empty(&w->sources);
2456 w->is_source = !list_empty(&w->sinks);
2463 static int snd_soc_dapm_check_dynamic_path(struct snd_soc_dapm_context *dapm,
2464 struct snd_soc_dapm_widget *source, struct snd_soc_dapm_widget *sink,
2465 const char *control)
2467 bool dynamic_source = false;
2468 bool dynamic_sink = false;
2473 switch (source->id) {
2474 case snd_soc_dapm_demux:
2475 dynamic_source = true;
2482 case snd_soc_dapm_mux:
2483 case snd_soc_dapm_switch:
2484 case snd_soc_dapm_mixer:
2485 case snd_soc_dapm_mixer_named_ctl:
2486 dynamic_sink = true;
2492 if (dynamic_source && dynamic_sink) {
2494 "Direct connection between demux and mixer/mux not supported for path %s -> [%s] -> %s\n",
2495 source->name, control, sink->name);
2497 } else if (!dynamic_source && !dynamic_sink) {
2499 "Control not supported for path %s -> [%s] -> %s\n",
2500 source->name, control, sink->name);
2507 static int snd_soc_dapm_add_path(struct snd_soc_dapm_context *dapm,
2508 struct snd_soc_dapm_widget *wsource, struct snd_soc_dapm_widget *wsink,
2509 const char *control,
2510 int (*connected)(struct snd_soc_dapm_widget *source,
2511 struct snd_soc_dapm_widget *sink))
2513 struct snd_soc_dapm_path *path;
2516 if (wsink->is_supply && !wsource->is_supply) {
2518 "Connecting non-supply widget to supply widget is not supported (%s -> %s)\n",
2519 wsource->name, wsink->name);
2523 if (connected && !wsource->is_supply) {
2525 "connected() callback only supported for supply widgets (%s -> %s)\n",
2526 wsource->name, wsink->name);
2530 if (wsource->is_supply && control) {
2532 "Conditional paths are not supported for supply widgets (%s -> [%s] -> %s)\n",
2533 wsource->name, control, wsink->name);
2537 ret = snd_soc_dapm_check_dynamic_path(dapm, wsource, wsink, control);
2541 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
2545 path->source = wsource;
2547 path->connected = connected;
2548 INIT_LIST_HEAD(&path->list);
2549 INIT_LIST_HEAD(&path->list_kcontrol);
2550 INIT_LIST_HEAD(&path->list_source);
2551 INIT_LIST_HEAD(&path->list_sink);
2553 if (wsource->is_supply || wsink->is_supply)
2554 path->is_supply = 1;
2556 /* connect static paths */
2557 if (control == NULL) {
2560 switch (wsource->id) {
2561 case snd_soc_dapm_demux:
2562 ret = dapm_connect_mux(dapm, path, control, wsource);
2570 switch (wsink->id) {
2571 case snd_soc_dapm_mux:
2572 ret = dapm_connect_mux(dapm, path, control, wsink);
2576 case snd_soc_dapm_switch:
2577 case snd_soc_dapm_mixer:
2578 case snd_soc_dapm_mixer_named_ctl:
2579 ret = dapm_connect_mixer(dapm, path, control);
2588 list_add(&path->list, &dapm->card->paths);
2589 list_add(&path->list_sink, &wsink->sources);
2590 list_add(&path->list_source, &wsource->sinks);
2592 dapm_update_widget_flags(wsource);
2593 dapm_update_widget_flags(wsink);
2595 dapm_mark_dirty(wsource, "Route added");
2596 dapm_mark_dirty(wsink, "Route added");
2598 if (dapm->card->instantiated && path->connect)
2599 dapm_path_invalidate(path);
2607 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
2608 const struct snd_soc_dapm_route *route)
2610 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
2611 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
2614 char prefixed_sink[80];
2615 char prefixed_source[80];
2619 prefix = soc_dapm_prefix(dapm);
2621 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
2622 prefix, route->sink);
2623 sink = prefixed_sink;
2624 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
2625 prefix, route->source);
2626 source = prefixed_source;
2629 source = route->source;
2632 wsource = dapm_wcache_lookup(&dapm->path_source_cache, source);
2633 wsink = dapm_wcache_lookup(&dapm->path_sink_cache, sink);
2635 if (wsink && wsource)
2639 * find src and dest widgets over all widgets but favor a widget from
2640 * current DAPM context
2642 list_for_each_entry(w, &dapm->card->widgets, list) {
2643 if (!wsink && !(strcmp(w->name, sink))) {
2645 if (w->dapm == dapm) {
2652 if (!wsource && !(strcmp(w->name, source))) {
2654 if (w->dapm == dapm) {
2661 /* use widget from another DAPM context if not found from this */
2667 if (wsource == NULL) {
2668 dev_err(dapm->dev, "ASoC: no source widget found for %s\n",
2672 if (wsink == NULL) {
2673 dev_err(dapm->dev, "ASoC: no sink widget found for %s\n",
2679 dapm_wcache_update(&dapm->path_sink_cache, wsink);
2680 dapm_wcache_update(&dapm->path_source_cache, wsource);
2682 ret = snd_soc_dapm_add_path(dapm, wsource, wsink, route->control,
2689 dev_warn(dapm->dev, "ASoC: no dapm match for %s --> %s --> %s\n",
2690 source, route->control, sink);
2694 static int snd_soc_dapm_del_route(struct snd_soc_dapm_context *dapm,
2695 const struct snd_soc_dapm_route *route)
2697 struct snd_soc_dapm_widget *wsource, *wsink;
2698 struct snd_soc_dapm_path *path, *p;
2701 char prefixed_sink[80];
2702 char prefixed_source[80];
2705 if (route->control) {
2707 "ASoC: Removal of routes with controls not supported\n");
2711 prefix = soc_dapm_prefix(dapm);
2713 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
2714 prefix, route->sink);
2715 sink = prefixed_sink;
2716 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
2717 prefix, route->source);
2718 source = prefixed_source;
2721 source = route->source;
2725 list_for_each_entry(p, &dapm->card->paths, list) {
2726 if (strcmp(p->source->name, source) != 0)
2728 if (strcmp(p->sink->name, sink) != 0)
2735 wsource = path->source;
2738 dapm_mark_dirty(wsource, "Route removed");
2739 dapm_mark_dirty(wsink, "Route removed");
2741 dapm_path_invalidate(path);
2743 dapm_free_path(path);
2745 /* Update any path related flags */
2746 dapm_update_widget_flags(wsource);
2747 dapm_update_widget_flags(wsink);
2749 dev_warn(dapm->dev, "ASoC: Route %s->%s does not exist\n",
2757 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
2758 * @dapm: DAPM context
2759 * @route: audio routes
2760 * @num: number of routes
2762 * Connects 2 dapm widgets together via a named audio path. The sink is
2763 * the widget receiving the audio signal, whilst the source is the sender
2764 * of the audio signal.
2766 * Returns 0 for success else error. On error all resources can be freed
2767 * with a call to snd_soc_card_free().
2769 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
2770 const struct snd_soc_dapm_route *route, int num)
2774 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2775 for (i = 0; i < num; i++) {
2776 r = snd_soc_dapm_add_route(dapm, route);
2778 dev_err(dapm->dev, "ASoC: Failed to add route %s -> %s -> %s\n",
2780 route->control ? route->control : "direct",
2786 mutex_unlock(&dapm->card->dapm_mutex);
2790 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
2793 * snd_soc_dapm_del_routes - Remove routes between DAPM widgets
2794 * @dapm: DAPM context
2795 * @route: audio routes
2796 * @num: number of routes
2798 * Removes routes from the DAPM context.
2800 int snd_soc_dapm_del_routes(struct snd_soc_dapm_context *dapm,
2801 const struct snd_soc_dapm_route *route, int num)
2805 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2806 for (i = 0; i < num; i++) {
2807 snd_soc_dapm_del_route(dapm, route);
2810 mutex_unlock(&dapm->card->dapm_mutex);
2814 EXPORT_SYMBOL_GPL(snd_soc_dapm_del_routes);
2816 static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm,
2817 const struct snd_soc_dapm_route *route)
2819 struct snd_soc_dapm_widget *source = dapm_find_widget(dapm,
2822 struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm,
2825 struct snd_soc_dapm_path *path;
2829 dev_err(dapm->dev, "ASoC: Unable to find source %s for weak route\n",
2835 dev_err(dapm->dev, "ASoC: Unable to find sink %s for weak route\n",
2840 if (route->control || route->connected)
2841 dev_warn(dapm->dev, "ASoC: Ignoring control for weak route %s->%s\n",
2842 route->source, route->sink);
2844 list_for_each_entry(path, &source->sinks, list_source) {
2845 if (path->sink == sink) {
2852 dev_err(dapm->dev, "ASoC: No path found for weak route %s->%s\n",
2853 route->source, route->sink);
2855 dev_warn(dapm->dev, "ASoC: %d paths found for weak route %s->%s\n",
2856 count, route->source, route->sink);
2862 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
2863 * @dapm: DAPM context
2864 * @route: audio routes
2865 * @num: number of routes
2867 * Mark existing routes matching those specified in the passed array
2868 * as being weak, meaning that they are ignored for the purpose of
2869 * power decisions. The main intended use case is for sidetone paths
2870 * which couple audio between other independent paths if they are both
2871 * active in order to make the combination work better at the user
2872 * level but which aren't intended to be "used".
2874 * Note that CODEC drivers should not use this as sidetone type paths
2875 * can frequently also be used as bypass paths.
2877 int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm,
2878 const struct snd_soc_dapm_route *route, int num)
2883 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2884 for (i = 0; i < num; i++) {
2885 err = snd_soc_dapm_weak_route(dapm, route);
2890 mutex_unlock(&dapm->card->dapm_mutex);
2894 EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes);
2897 * snd_soc_dapm_new_widgets - add new dapm widgets
2898 * @dapm: DAPM context
2900 * Checks the codec for any new dapm widgets and creates them if found.
2902 * Returns 0 for success.
2904 int snd_soc_dapm_new_widgets(struct snd_soc_card *card)
2906 struct snd_soc_dapm_widget *w;
2909 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2911 list_for_each_entry(w, &card->widgets, list)
2916 if (w->num_kcontrols) {
2917 w->kcontrols = kzalloc(w->num_kcontrols *
2918 sizeof(struct snd_kcontrol *),
2920 if (!w->kcontrols) {
2921 mutex_unlock(&card->dapm_mutex);
2927 case snd_soc_dapm_switch:
2928 case snd_soc_dapm_mixer:
2929 case snd_soc_dapm_mixer_named_ctl:
2932 case snd_soc_dapm_mux:
2933 case snd_soc_dapm_demux:
2936 case snd_soc_dapm_pga:
2937 case snd_soc_dapm_out_drv:
2940 case snd_soc_dapm_dai_link:
2941 dapm_new_dai_link(w);
2947 /* Read the initial power state from the device */
2949 soc_dapm_read(w->dapm, w->reg, &val);
2950 val = val >> w->shift;
2952 if (val == w->on_val)
2958 dapm_mark_dirty(w, "new widget");
2959 dapm_debugfs_add_widget(w);
2962 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2963 mutex_unlock(&card->dapm_mutex);
2966 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
2969 * snd_soc_dapm_get_volsw - dapm mixer get callback
2970 * @kcontrol: mixer control
2971 * @ucontrol: control element information
2973 * Callback to get the value of a dapm mixer control.
2975 * Returns 0 for success.
2977 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
2978 struct snd_ctl_elem_value *ucontrol)
2980 struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
2981 struct snd_soc_card *card = dapm->card;
2982 struct soc_mixer_control *mc =
2983 (struct soc_mixer_control *)kcontrol->private_value;
2985 unsigned int shift = mc->shift;
2987 unsigned int mask = (1 << fls(max)) - 1;
2988 unsigned int invert = mc->invert;
2992 if (snd_soc_volsw_is_stereo(mc))
2994 "ASoC: Control '%s' is stereo, which is not supported\n",
2997 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2998 if (dapm_kcontrol_is_powered(kcontrol) && reg != SND_SOC_NOPM) {
2999 ret = soc_dapm_read(dapm, reg, &val);
3000 val = (val >> shift) & mask;
3002 val = dapm_kcontrol_get_value(kcontrol);
3004 mutex_unlock(&card->dapm_mutex);
3007 ucontrol->value.integer.value[0] = max - val;
3009 ucontrol->value.integer.value[0] = val;
3013 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
3016 * snd_soc_dapm_put_volsw - dapm mixer set callback
3017 * @kcontrol: mixer control
3018 * @ucontrol: control element information
3020 * Callback to set the value of a dapm mixer control.
3022 * Returns 0 for success.
3024 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
3025 struct snd_ctl_elem_value *ucontrol)
3027 struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
3028 struct snd_soc_card *card = dapm->card;
3029 struct soc_mixer_control *mc =
3030 (struct soc_mixer_control *)kcontrol->private_value;
3032 unsigned int shift = mc->shift;
3034 unsigned int mask = (1 << fls(max)) - 1;
3035 unsigned int invert = mc->invert;
3037 int connect, change, reg_change = 0;
3038 struct snd_soc_dapm_update update;
3041 if (snd_soc_volsw_is_stereo(mc))
3043 "ASoC: Control '%s' is stereo, which is not supported\n",
3046 val = (ucontrol->value.integer.value[0] & mask);
3052 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3054 change = dapm_kcontrol_set_value(kcontrol, val);
3056 if (reg != SND_SOC_NOPM) {
3057 mask = mask << shift;
3060 reg_change = soc_dapm_test_bits(dapm, reg, mask, val);
3063 if (change || reg_change) {
3065 update.kcontrol = kcontrol;
3069 card->update = &update;
3071 change |= reg_change;
3073 ret = soc_dapm_mixer_update_power(card, kcontrol, connect);
3075 card->update = NULL;
3078 mutex_unlock(&card->dapm_mutex);
3081 soc_dpcm_runtime_update(card);
3085 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
3088 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
3089 * @kcontrol: mixer control
3090 * @ucontrol: control element information
3092 * Callback to get the value of a dapm enumerated double mixer control.
3094 * Returns 0 for success.
3096 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
3097 struct snd_ctl_elem_value *ucontrol)
3099 struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
3100 struct snd_soc_card *card = dapm->card;
3101 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
3102 unsigned int reg_val, val;
3104 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3105 if (e->reg != SND_SOC_NOPM && dapm_kcontrol_is_powered(kcontrol)) {
3106 int ret = soc_dapm_read(dapm, e->reg, ®_val);
3108 mutex_unlock(&card->dapm_mutex);
3112 reg_val = dapm_kcontrol_get_value(kcontrol);
3114 mutex_unlock(&card->dapm_mutex);
3116 val = (reg_val >> e->shift_l) & e->mask;
3117 ucontrol->value.enumerated.item[0] = snd_soc_enum_val_to_item(e, val);
3118 if (e->shift_l != e->shift_r) {
3119 val = (reg_val >> e->shift_r) & e->mask;
3120 val = snd_soc_enum_val_to_item(e, val);
3121 ucontrol->value.enumerated.item[1] = val;
3126 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
3129 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
3130 * @kcontrol: mixer control
3131 * @ucontrol: control element information
3133 * Callback to set the value of a dapm enumerated double mixer control.
3135 * Returns 0 for success.
3137 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
3138 struct snd_ctl_elem_value *ucontrol)
3140 struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
3141 struct snd_soc_card *card = dapm->card;
3142 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
3143 unsigned int *item = ucontrol->value.enumerated.item;
3144 unsigned int val, change, reg_change = 0;
3146 struct snd_soc_dapm_update update;
3149 if (item[0] >= e->items)
3152 val = snd_soc_enum_item_to_val(e, item[0]) << e->shift_l;
3153 mask = e->mask << e->shift_l;
3154 if (e->shift_l != e->shift_r) {
3155 if (item[1] > e->items)
3157 val |= snd_soc_enum_item_to_val(e, item[1]) << e->shift_l;
3158 mask |= e->mask << e->shift_r;
3161 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3163 change = dapm_kcontrol_set_value(kcontrol, val);
3165 if (e->reg != SND_SOC_NOPM)
3166 reg_change = soc_dapm_test_bits(dapm, e->reg, mask, val);
3168 if (change || reg_change) {
3170 update.kcontrol = kcontrol;
3171 update.reg = e->reg;
3174 card->update = &update;
3176 change |= reg_change;
3178 ret = soc_dapm_mux_update_power(card, kcontrol, item[0], e);
3180 card->update = NULL;
3183 mutex_unlock(&card->dapm_mutex);
3186 soc_dpcm_runtime_update(card);
3190 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
3193 * snd_soc_dapm_info_pin_switch - Info for a pin switch
3195 * @kcontrol: mixer control
3196 * @uinfo: control element information
3198 * Callback to provide information about a pin switch control.
3200 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
3201 struct snd_ctl_elem_info *uinfo)
3203 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
3205 uinfo->value.integer.min = 0;
3206 uinfo->value.integer.max = 1;
3210 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
3213 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
3215 * @kcontrol: mixer control
3218 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
3219 struct snd_ctl_elem_value *ucontrol)
3221 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
3222 const char *pin = (const char *)kcontrol->private_value;
3224 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3226 ucontrol->value.integer.value[0] =
3227 snd_soc_dapm_get_pin_status(&card->dapm, pin);
3229 mutex_unlock(&card->dapm_mutex);
3233 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
3236 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
3238 * @kcontrol: mixer control
3241 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
3242 struct snd_ctl_elem_value *ucontrol)
3244 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
3245 const char *pin = (const char *)kcontrol->private_value;
3247 if (ucontrol->value.integer.value[0])
3248 snd_soc_dapm_enable_pin(&card->dapm, pin);
3250 snd_soc_dapm_disable_pin(&card->dapm, pin);
3252 snd_soc_dapm_sync(&card->dapm);
3255 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
3257 struct snd_soc_dapm_widget *
3258 snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
3259 const struct snd_soc_dapm_widget *widget)
3261 struct snd_soc_dapm_widget *w;
3263 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3264 w = snd_soc_dapm_new_control_unlocked(dapm, widget);
3267 "ASoC: Failed to create DAPM control %s\n",
3270 mutex_unlock(&dapm->card->dapm_mutex);
3274 struct snd_soc_dapm_widget *
3275 snd_soc_dapm_new_control_unlocked(struct snd_soc_dapm_context *dapm,
3276 const struct snd_soc_dapm_widget *widget)
3278 struct snd_soc_dapm_widget *w;
3282 if ((w = dapm_cnew_widget(widget)) == NULL)
3286 case snd_soc_dapm_regulator_supply:
3287 w->regulator = devm_regulator_get(dapm->dev, w->name);
3288 if (IS_ERR(w->regulator)) {
3289 ret = PTR_ERR(w->regulator);
3290 dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n",
3295 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
3296 ret = regulator_allow_bypass(w->regulator, true);
3298 dev_warn(w->dapm->dev,
3299 "ASoC: Failed to bypass %s: %d\n",
3303 case snd_soc_dapm_clock_supply:
3304 #ifdef CONFIG_CLKDEV_LOOKUP
3305 w->clk = devm_clk_get(dapm->dev, w->name);
3306 if (IS_ERR(w->clk)) {
3307 ret = PTR_ERR(w->clk);
3308 dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n",
3320 prefix = soc_dapm_prefix(dapm);
3322 w->name = kasprintf(GFP_KERNEL, "%s %s", prefix, widget->name);
3324 w->name = kstrdup_const(widget->name, GFP_KERNEL);
3325 if (w->name == NULL) {
3331 case snd_soc_dapm_mic:
3333 w->power_check = dapm_generic_check_power;
3335 case snd_soc_dapm_input:
3336 if (!dapm->card->fully_routed)
3338 w->power_check = dapm_generic_check_power;
3340 case snd_soc_dapm_spk:
3341 case snd_soc_dapm_hp:
3343 w->power_check = dapm_generic_check_power;
3345 case snd_soc_dapm_output:
3346 if (!dapm->card->fully_routed)
3348 w->power_check = dapm_generic_check_power;
3350 case snd_soc_dapm_vmid:
3351 case snd_soc_dapm_siggen:
3353 w->power_check = dapm_always_on_check_power;
3355 case snd_soc_dapm_mux:
3356 case snd_soc_dapm_demux:
3357 case snd_soc_dapm_switch:
3358 case snd_soc_dapm_mixer:
3359 case snd_soc_dapm_mixer_named_ctl:
3360 case snd_soc_dapm_adc:
3361 case snd_soc_dapm_aif_out:
3362 case snd_soc_dapm_dac:
3363 case snd_soc_dapm_aif_in:
3364 case snd_soc_dapm_pga:
3365 case snd_soc_dapm_out_drv:
3366 case snd_soc_dapm_micbias:
3367 case snd_soc_dapm_line:
3368 case snd_soc_dapm_dai_link:
3369 case snd_soc_dapm_dai_out:
3370 case snd_soc_dapm_dai_in:
3371 w->power_check = dapm_generic_check_power;
3373 case snd_soc_dapm_supply:
3374 case snd_soc_dapm_regulator_supply:
3375 case snd_soc_dapm_clock_supply:
3376 case snd_soc_dapm_kcontrol:
3378 w->power_check = dapm_supply_check_power;
3381 w->power_check = dapm_always_on_check_power;
3386 INIT_LIST_HEAD(&w->sources);
3387 INIT_LIST_HEAD(&w->sinks);
3388 INIT_LIST_HEAD(&w->list);
3389 INIT_LIST_HEAD(&w->dirty);
3390 list_add_tail(&w->list, &dapm->card->widgets);
3395 /* machine layer set ups unconnected pins and insertions */
3401 * snd_soc_dapm_new_controls - create new dapm controls
3402 * @dapm: DAPM context
3403 * @widget: widget array
3404 * @num: number of widgets
3406 * Creates new DAPM controls based upon the templates.
3408 * Returns 0 for success else error.
3410 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
3411 const struct snd_soc_dapm_widget *widget,
3414 struct snd_soc_dapm_widget *w;
3418 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
3419 for (i = 0; i < num; i++) {
3420 w = snd_soc_dapm_new_control_unlocked(dapm, widget);
3423 "ASoC: Failed to create DAPM control %s\n",
3430 mutex_unlock(&dapm->card->dapm_mutex);
3433 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
3435 static int snd_soc_dai_link_event(struct snd_soc_dapm_widget *w,
3436 struct snd_kcontrol *kcontrol, int event)
3438 struct snd_soc_dapm_path *source_p, *sink_p;
3439 struct snd_soc_dai *source, *sink;
3440 const struct snd_soc_pcm_stream *config = w->params + w->params_select;
3441 struct snd_pcm_substream substream;
3442 struct snd_pcm_hw_params *params = NULL;
3446 if (WARN_ON(!config) ||
3447 WARN_ON(list_empty(&w->sources) || list_empty(&w->sinks)))
3450 /* We only support a single source and sink, pick the first */
3451 source_p = list_first_entry(&w->sources, struct snd_soc_dapm_path,
3453 sink_p = list_first_entry(&w->sinks, struct snd_soc_dapm_path,
3456 source = source_p->source->priv;
3457 sink = sink_p->sink->priv;
3459 /* Be a little careful as we don't want to overflow the mask array */
3460 if (config->formats) {
3461 fmt = ffs(config->formats) - 1;
3463 dev_warn(w->dapm->dev, "ASoC: Invalid format %llx specified\n",
3468 /* Currently very limited parameter selection */
3469 params = kzalloc(sizeof(*params), GFP_KERNEL);
3474 snd_mask_set(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), fmt);
3476 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->min =
3478 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->max =
3481 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->min
3482 = config->channels_min;
3483 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->max
3484 = config->channels_max;
3486 memset(&substream, 0, sizeof(substream));
3489 case SND_SOC_DAPM_PRE_PMU:
3490 substream.stream = SNDRV_PCM_STREAM_CAPTURE;
3491 ret = soc_dai_hw_params(&substream, params, source);
3495 substream.stream = SNDRV_PCM_STREAM_PLAYBACK;
3496 ret = soc_dai_hw_params(&substream, params, sink);
3501 case SND_SOC_DAPM_POST_PMU:
3502 ret = snd_soc_dai_digital_mute(sink, 0,
3503 SNDRV_PCM_STREAM_PLAYBACK);
3504 if (ret != 0 && ret != -ENOTSUPP)
3505 dev_warn(sink->dev, "ASoC: Failed to unmute: %d\n", ret);
3509 case SND_SOC_DAPM_PRE_PMD:
3510 ret = snd_soc_dai_digital_mute(sink, 1,
3511 SNDRV_PCM_STREAM_PLAYBACK);
3512 if (ret != 0 && ret != -ENOTSUPP)
3513 dev_warn(sink->dev, "ASoC: Failed to mute: %d\n", ret);
3518 WARN(1, "Unknown event %d\n", event);
3527 static int snd_soc_dapm_dai_link_get(struct snd_kcontrol *kcontrol,
3528 struct snd_ctl_elem_value *ucontrol)
3530 struct snd_soc_dapm_widget *w = snd_kcontrol_chip(kcontrol);
3532 ucontrol->value.integer.value[0] = w->params_select;
3537 static int snd_soc_dapm_dai_link_put(struct snd_kcontrol *kcontrol,
3538 struct snd_ctl_elem_value *ucontrol)
3540 struct snd_soc_dapm_widget *w = snd_kcontrol_chip(kcontrol);
3542 /* Can't change the config when widget is already powered */
3546 if (ucontrol->value.integer.value[0] == w->params_select)
3549 if (ucontrol->value.integer.value[0] >= w->num_params)
3552 w->params_select = ucontrol->value.integer.value[0];
3557 int snd_soc_dapm_new_pcm(struct snd_soc_card *card,
3558 const struct snd_soc_pcm_stream *params,
3559 unsigned int num_params,
3560 struct snd_soc_dapm_widget *source,
3561 struct snd_soc_dapm_widget *sink)
3563 struct snd_soc_dapm_widget template;
3564 struct snd_soc_dapm_widget *w;
3567 unsigned long private_value;
3568 const char **w_param_text;
3569 struct soc_enum w_param_enum[] = {
3570 SOC_ENUM_SINGLE(0, 0, 0, NULL),
3572 struct snd_kcontrol_new kcontrol_dai_link[] = {
3573 SOC_ENUM_EXT(NULL, w_param_enum[0],
3574 snd_soc_dapm_dai_link_get,
3575 snd_soc_dapm_dai_link_put),
3577 const struct snd_soc_pcm_stream *config = params;
3579 w_param_text = devm_kcalloc(card->dev, num_params,
3580 sizeof(char *), GFP_KERNEL);
3584 link_name = devm_kasprintf(card->dev, GFP_KERNEL, "%s-%s",
3585 source->name, sink->name);
3588 goto outfree_w_param;
3591 for (count = 0 ; count < num_params; count++) {
3592 if (!config->stream_name) {
3593 dev_warn(card->dapm.dev,
3594 "ASoC: anonymous config %d for dai link %s\n",
3596 w_param_text[count] =
3597 devm_kasprintf(card->dev, GFP_KERNEL,
3598 "Anonymous Configuration %d",
3600 if (!w_param_text[count]) {
3602 goto outfree_link_name;
3605 w_param_text[count] = devm_kmemdup(card->dev,
3606 config->stream_name,
3607 strlen(config->stream_name) + 1,
3609 if (!w_param_text[count]) {
3611 goto outfree_link_name;
3616 w_param_enum[0].items = num_params;
3617 w_param_enum[0].texts = w_param_text;
3619 memset(&template, 0, sizeof(template));
3620 template.reg = SND_SOC_NOPM;
3621 template.id = snd_soc_dapm_dai_link;
3622 template.name = link_name;
3623 template.event = snd_soc_dai_link_event;
3624 template.event_flags = SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
3625 SND_SOC_DAPM_PRE_PMD;
3626 template.num_kcontrols = 1;
3627 /* duplicate w_param_enum on heap so that memory persists */
3629 (unsigned long) devm_kmemdup(card->dev,
3630 (void *)(kcontrol_dai_link[0].private_value),
3631 sizeof(struct soc_enum), GFP_KERNEL);
3632 if (!private_value) {
3633 dev_err(card->dev, "ASoC: Failed to create control for %s widget\n",
3636 goto outfree_link_name;
3638 kcontrol_dai_link[0].private_value = private_value;
3639 /* duplicate kcontrol_dai_link on heap so that memory persists */
3640 template.kcontrol_news =
3641 devm_kmemdup(card->dev, &kcontrol_dai_link[0],
3642 sizeof(struct snd_kcontrol_new),
3644 if (!template.kcontrol_news) {
3645 dev_err(card->dev, "ASoC: Failed to create control for %s widget\n",
3648 goto outfree_private_value;
3651 dev_dbg(card->dev, "ASoC: adding %s widget\n", link_name);
3653 w = snd_soc_dapm_new_control_unlocked(&card->dapm, &template);
3655 dev_err(card->dev, "ASoC: Failed to create %s widget\n",
3658 goto outfree_kcontrol_news;
3662 w->num_params = num_params;
3664 ret = snd_soc_dapm_add_path(&card->dapm, source, w, NULL, NULL);
3667 return snd_soc_dapm_add_path(&card->dapm, w, sink, NULL, NULL);
3670 devm_kfree(card->dev, w);
3671 outfree_kcontrol_news:
3672 devm_kfree(card->dev, (void *)template.kcontrol_news);
3673 outfree_private_value:
3674 devm_kfree(card->dev, (void *)private_value);
3676 devm_kfree(card->dev, link_name);
3678 for (count = 0 ; count < num_params; count++)
3679 devm_kfree(card->dev, (void *)w_param_text[count]);
3680 devm_kfree(card->dev, w_param_text);
3685 int snd_soc_dapm_new_dai_widgets(struct snd_soc_dapm_context *dapm,
3686 struct snd_soc_dai *dai)
3688 struct snd_soc_dapm_widget template;
3689 struct snd_soc_dapm_widget *w;
3691 WARN_ON(dapm->dev != dai->dev);
3693 memset(&template, 0, sizeof(template));
3694 template.reg = SND_SOC_NOPM;
3696 if (dai->driver->playback.stream_name) {
3697 template.id = snd_soc_dapm_dai_in;
3698 template.name = dai->driver->playback.stream_name;
3699 template.sname = dai->driver->playback.stream_name;
3701 dev_dbg(dai->dev, "ASoC: adding %s widget\n",
3704 w = snd_soc_dapm_new_control_unlocked(dapm, &template);
3706 dev_err(dapm->dev, "ASoC: Failed to create %s widget\n",
3707 dai->driver->playback.stream_name);
3712 dai->playback_widget = w;
3715 if (dai->driver->capture.stream_name) {
3716 template.id = snd_soc_dapm_dai_out;
3717 template.name = dai->driver->capture.stream_name;
3718 template.sname = dai->driver->capture.stream_name;
3720 dev_dbg(dai->dev, "ASoC: adding %s widget\n",
3723 w = snd_soc_dapm_new_control_unlocked(dapm, &template);
3725 dev_err(dapm->dev, "ASoC: Failed to create %s widget\n",
3726 dai->driver->capture.stream_name);
3731 dai->capture_widget = w;
3737 int snd_soc_dapm_link_dai_widgets(struct snd_soc_card *card)
3739 struct snd_soc_dapm_widget *dai_w, *w;
3740 struct snd_soc_dapm_widget *src, *sink;
3741 struct snd_soc_dai *dai;
3743 /* For each DAI widget... */
3744 list_for_each_entry(dai_w, &card->widgets, list) {
3745 switch (dai_w->id) {
3746 case snd_soc_dapm_dai_in:
3747 case snd_soc_dapm_dai_out:
3755 /* ...find all widgets with the same stream and link them */
3756 list_for_each_entry(w, &card->widgets, list) {
3757 if (w->dapm != dai_w->dapm)
3761 case snd_soc_dapm_dai_in:
3762 case snd_soc_dapm_dai_out:
3768 if (!w->sname || !strstr(w->sname, dai_w->sname))
3771 if (dai_w->id == snd_soc_dapm_dai_in) {
3778 dev_dbg(dai->dev, "%s -> %s\n", src->name, sink->name);
3779 snd_soc_dapm_add_path(w->dapm, src, sink, NULL, NULL);
3786 static void dapm_connect_dai_link_widgets(struct snd_soc_card *card,
3787 struct snd_soc_pcm_runtime *rtd)
3789 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
3790 struct snd_soc_dapm_widget *sink, *source;
3793 for (i = 0; i < rtd->num_codecs; i++) {
3794 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
3796 /* there is no point in connecting BE DAI links with dummies */
3797 if (snd_soc_dai_is_dummy(codec_dai) ||
3798 snd_soc_dai_is_dummy(cpu_dai))
3801 /* connect BE DAI playback if widgets are valid */
3802 if (codec_dai->playback_widget && cpu_dai->playback_widget) {
3803 source = cpu_dai->playback_widget;
3804 sink = codec_dai->playback_widget;
3805 dev_dbg(rtd->dev, "connected DAI link %s:%s -> %s:%s\n",
3806 cpu_dai->component->name, source->name,
3807 codec_dai->component->name, sink->name);
3809 snd_soc_dapm_add_path(&card->dapm, source, sink,
3813 /* connect BE DAI capture if widgets are valid */
3814 if (codec_dai->capture_widget && cpu_dai->capture_widget) {
3815 source = codec_dai->capture_widget;
3816 sink = cpu_dai->capture_widget;
3817 dev_dbg(rtd->dev, "connected DAI link %s:%s -> %s:%s\n",
3818 codec_dai->component->name, source->name,
3819 cpu_dai->component->name, sink->name);
3821 snd_soc_dapm_add_path(&card->dapm, source, sink,
3827 static void soc_dapm_dai_stream_event(struct snd_soc_dai *dai, int stream,
3830 struct snd_soc_dapm_widget *w;
3832 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
3833 w = dai->playback_widget;
3835 w = dai->capture_widget;
3838 dapm_mark_dirty(w, "stream event");
3841 case SND_SOC_DAPM_STREAM_START:
3844 case SND_SOC_DAPM_STREAM_STOP:
3847 case SND_SOC_DAPM_STREAM_SUSPEND:
3848 case SND_SOC_DAPM_STREAM_RESUME:
3849 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
3850 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
3854 if (w->id == snd_soc_dapm_dai_in) {
3855 w->is_source = w->active;
3856 dapm_widget_invalidate_input_paths(w);
3858 w->is_sink = w->active;
3859 dapm_widget_invalidate_output_paths(w);
3864 void snd_soc_dapm_connect_dai_link_widgets(struct snd_soc_card *card)
3866 struct snd_soc_pcm_runtime *rtd = card->rtd;
3869 /* for each BE DAI link... */
3870 for (i = 0; i < card->num_rtd; i++) {
3871 rtd = &card->rtd[i];
3874 * dynamic FE links have no fixed DAI mapping.
3875 * CODEC<->CODEC links have no direct connection.
3877 if (rtd->dai_link->dynamic || rtd->dai_link->params)
3880 dapm_connect_dai_link_widgets(card, rtd);
3884 static void soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
3889 soc_dapm_dai_stream_event(rtd->cpu_dai, stream, event);
3890 for (i = 0; i < rtd->num_codecs; i++)
3891 soc_dapm_dai_stream_event(rtd->codec_dais[i], stream, event);
3893 dapm_power_widgets(rtd->card, event);
3897 * snd_soc_dapm_stream_event - send a stream event to the dapm core
3898 * @rtd: PCM runtime data
3899 * @stream: stream name
3900 * @event: stream event
3902 * Sends a stream event to the dapm core. The core then makes any
3903 * necessary widget power changes.
3905 * Returns 0 for success else error.
3907 void snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
3910 struct snd_soc_card *card = rtd->card;
3912 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3913 soc_dapm_stream_event(rtd, stream, event);
3914 mutex_unlock(&card->dapm_mutex);
3918 * snd_soc_dapm_enable_pin_unlocked - enable pin.
3919 * @dapm: DAPM context
3922 * Enables input/output pin and its parents or children widgets iff there is
3923 * a valid audio route and active audio stream.
3925 * Requires external locking.
3927 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3928 * do any widget power switching.
3930 int snd_soc_dapm_enable_pin_unlocked(struct snd_soc_dapm_context *dapm,
3933 return snd_soc_dapm_set_pin(dapm, pin, 1);
3935 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin_unlocked);
3938 * snd_soc_dapm_enable_pin - enable pin.
3939 * @dapm: DAPM context
3942 * Enables input/output pin and its parents or children widgets iff there is
3943 * a valid audio route and active audio stream.
3945 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3946 * do any widget power switching.
3948 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
3952 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3954 ret = snd_soc_dapm_set_pin(dapm, pin, 1);
3956 mutex_unlock(&dapm->card->dapm_mutex);
3960 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
3963 * snd_soc_dapm_force_enable_pin_unlocked - force a pin to be enabled
3964 * @dapm: DAPM context
3967 * Enables input/output pin regardless of any other state. This is
3968 * intended for use with microphone bias supplies used in microphone
3971 * Requires external locking.
3973 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3974 * do any widget power switching.
3976 int snd_soc_dapm_force_enable_pin_unlocked(struct snd_soc_dapm_context *dapm,
3979 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
3982 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
3986 dev_dbg(w->dapm->dev, "ASoC: force enable pin %s\n", pin);
3987 if (!w->connected) {
3989 * w->force does not affect the number of input or output paths,
3990 * so we only have to recheck if w->connected is changed
3992 dapm_widget_invalidate_input_paths(w);
3993 dapm_widget_invalidate_output_paths(w);
3997 dapm_mark_dirty(w, "force enable");
4001 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin_unlocked);
4004 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
4005 * @dapm: DAPM context
4008 * Enables input/output pin regardless of any other state. This is
4009 * intended for use with microphone bias supplies used in microphone
4012 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4013 * do any widget power switching.
4015 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
4020 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
4022 ret = snd_soc_dapm_force_enable_pin_unlocked(dapm, pin);
4024 mutex_unlock(&dapm->card->dapm_mutex);
4028 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
4031 * snd_soc_dapm_disable_pin_unlocked - disable pin.
4032 * @dapm: DAPM context
4035 * Disables input/output pin and its parents or children widgets.
4037 * Requires external locking.
4039 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4040 * do any widget power switching.
4042 int snd_soc_dapm_disable_pin_unlocked(struct snd_soc_dapm_context *dapm,
4045 return snd_soc_dapm_set_pin(dapm, pin, 0);
4047 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin_unlocked);
4050 * snd_soc_dapm_disable_pin - disable pin.
4051 * @dapm: DAPM context
4054 * Disables input/output pin and its parents or children widgets.
4056 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4057 * do any widget power switching.
4059 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
4064 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
4066 ret = snd_soc_dapm_set_pin(dapm, pin, 0);
4068 mutex_unlock(&dapm->card->dapm_mutex);
4072 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
4075 * snd_soc_dapm_nc_pin_unlocked - permanently disable pin.
4076 * @dapm: DAPM context
4079 * Marks the specified pin as being not connected, disabling it along
4080 * any parent or child widgets. At present this is identical to
4081 * snd_soc_dapm_disable_pin() but in future it will be extended to do
4082 * additional things such as disabling controls which only affect
4083 * paths through the pin.
4085 * Requires external locking.
4087 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4088 * do any widget power switching.
4090 int snd_soc_dapm_nc_pin_unlocked(struct snd_soc_dapm_context *dapm,
4093 return snd_soc_dapm_set_pin(dapm, pin, 0);
4095 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin_unlocked);
4098 * snd_soc_dapm_nc_pin - permanently disable pin.
4099 * @dapm: DAPM context
4102 * Marks the specified pin as being not connected, disabling it along
4103 * any parent or child widgets. At present this is identical to
4104 * snd_soc_dapm_disable_pin() but in future it will be extended to do
4105 * additional things such as disabling controls which only affect
4106 * paths through the pin.
4108 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4109 * do any widget power switching.
4111 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
4115 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
4117 ret = snd_soc_dapm_set_pin(dapm, pin, 0);
4119 mutex_unlock(&dapm->card->dapm_mutex);
4123 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
4126 * snd_soc_dapm_get_pin_status - get audio pin status
4127 * @dapm: DAPM context
4128 * @pin: audio signal pin endpoint (or start point)
4130 * Get audio pin status - connected or disconnected.
4132 * Returns 1 for connected otherwise 0.
4134 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
4137 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
4140 return w->connected;
4144 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
4147 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
4148 * @dapm: DAPM context
4149 * @pin: audio signal pin endpoint (or start point)
4151 * Mark the given endpoint or pin as ignoring suspend. When the
4152 * system is disabled a path between two endpoints flagged as ignoring
4153 * suspend will not be disabled. The path must already be enabled via
4154 * normal means at suspend time, it will not be turned on if it was not
4157 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
4160 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
4163 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
4167 w->ignore_suspend = 1;
4171 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
4174 * snd_soc_dapm_free - free dapm resources
4175 * @dapm: DAPM context
4177 * Free all dapm widgets and resources.
4179 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
4181 dapm_debugfs_cleanup(dapm);
4182 dapm_free_widgets(dapm);
4183 list_del(&dapm->list);
4185 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
4187 static void soc_dapm_shutdown_dapm(struct snd_soc_dapm_context *dapm)
4189 struct snd_soc_card *card = dapm->card;
4190 struct snd_soc_dapm_widget *w;
4191 LIST_HEAD(down_list);
4194 mutex_lock(&card->dapm_mutex);
4196 list_for_each_entry(w, &dapm->card->widgets, list) {
4197 if (w->dapm != dapm)
4200 dapm_seq_insert(w, &down_list, false);
4206 /* If there were no widgets to power down we're already in
4210 if (dapm->bias_level == SND_SOC_BIAS_ON)
4211 snd_soc_dapm_set_bias_level(dapm,
4212 SND_SOC_BIAS_PREPARE);
4213 dapm_seq_run(card, &down_list, 0, false);
4214 if (dapm->bias_level == SND_SOC_BIAS_PREPARE)
4215 snd_soc_dapm_set_bias_level(dapm,
4216 SND_SOC_BIAS_STANDBY);
4219 mutex_unlock(&card->dapm_mutex);
4223 * snd_soc_dapm_shutdown - callback for system shutdown
4225 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
4227 struct snd_soc_dapm_context *dapm;
4229 list_for_each_entry(dapm, &card->dapm_list, list) {
4230 if (dapm != &card->dapm) {
4231 soc_dapm_shutdown_dapm(dapm);
4232 if (dapm->bias_level == SND_SOC_BIAS_STANDBY)
4233 snd_soc_dapm_set_bias_level(dapm,
4238 soc_dapm_shutdown_dapm(&card->dapm);
4239 if (card->dapm.bias_level == SND_SOC_BIAS_STANDBY)
4240 snd_soc_dapm_set_bias_level(&card->dapm,
4244 /* Module information */
4245 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
4246 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
4247 MODULE_LICENSE("GPL");