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));
55 static struct snd_soc_dapm_widget *
56 snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
57 const struct snd_soc_dapm_widget *widget);
59 /* dapm power sequences - make this per codec in the future */
60 static int dapm_up_seq[] = {
61 [snd_soc_dapm_pre] = 0,
62 [snd_soc_dapm_regulator_supply] = 1,
63 [snd_soc_dapm_clock_supply] = 1,
64 [snd_soc_dapm_supply] = 2,
65 [snd_soc_dapm_micbias] = 3,
66 [snd_soc_dapm_dai_link] = 2,
67 [snd_soc_dapm_dai_in] = 4,
68 [snd_soc_dapm_dai_out] = 4,
69 [snd_soc_dapm_aif_in] = 4,
70 [snd_soc_dapm_aif_out] = 4,
71 [snd_soc_dapm_mic] = 5,
72 [snd_soc_dapm_mux] = 6,
73 [snd_soc_dapm_dac] = 7,
74 [snd_soc_dapm_switch] = 8,
75 [snd_soc_dapm_mixer] = 8,
76 [snd_soc_dapm_mixer_named_ctl] = 8,
77 [snd_soc_dapm_pga] = 9,
78 [snd_soc_dapm_adc] = 10,
79 [snd_soc_dapm_out_drv] = 11,
80 [snd_soc_dapm_hp] = 11,
81 [snd_soc_dapm_spk] = 11,
82 [snd_soc_dapm_line] = 11,
83 [snd_soc_dapm_kcontrol] = 12,
84 [snd_soc_dapm_post] = 13,
87 static int dapm_down_seq[] = {
88 [snd_soc_dapm_pre] = 0,
89 [snd_soc_dapm_kcontrol] = 1,
90 [snd_soc_dapm_adc] = 2,
91 [snd_soc_dapm_hp] = 3,
92 [snd_soc_dapm_spk] = 3,
93 [snd_soc_dapm_line] = 3,
94 [snd_soc_dapm_out_drv] = 3,
95 [snd_soc_dapm_pga] = 4,
96 [snd_soc_dapm_switch] = 5,
97 [snd_soc_dapm_mixer_named_ctl] = 5,
98 [snd_soc_dapm_mixer] = 5,
99 [snd_soc_dapm_dac] = 6,
100 [snd_soc_dapm_mic] = 7,
101 [snd_soc_dapm_micbias] = 8,
102 [snd_soc_dapm_mux] = 9,
103 [snd_soc_dapm_aif_in] = 10,
104 [snd_soc_dapm_aif_out] = 10,
105 [snd_soc_dapm_dai_in] = 10,
106 [snd_soc_dapm_dai_out] = 10,
107 [snd_soc_dapm_dai_link] = 11,
108 [snd_soc_dapm_supply] = 12,
109 [snd_soc_dapm_clock_supply] = 13,
110 [snd_soc_dapm_regulator_supply] = 13,
111 [snd_soc_dapm_post] = 14,
114 static void dapm_assert_locked(struct snd_soc_dapm_context *dapm)
116 if (dapm->card && dapm->card->instantiated)
117 lockdep_assert_held(&dapm->card->dapm_mutex);
120 static void pop_wait(u32 pop_time)
123 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
126 static void pop_dbg(struct device *dev, u32 pop_time, const char *fmt, ...)
134 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
139 vsnprintf(buf, PAGE_SIZE, fmt, args);
140 dev_info(dev, "%s", buf);
146 static bool dapm_dirty_widget(struct snd_soc_dapm_widget *w)
148 return !list_empty(&w->dirty);
151 static void dapm_mark_dirty(struct snd_soc_dapm_widget *w, const char *reason)
153 dapm_assert_locked(w->dapm);
155 if (!dapm_dirty_widget(w)) {
156 dev_vdbg(w->dapm->dev, "Marking %s dirty due to %s\n",
158 list_add_tail(&w->dirty, &w->dapm->card->dapm_dirty);
162 void dapm_mark_io_dirty(struct snd_soc_dapm_context *dapm)
164 struct snd_soc_card *card = dapm->card;
165 struct snd_soc_dapm_widget *w;
167 mutex_lock(&card->dapm_mutex);
169 list_for_each_entry(w, &card->widgets, list) {
171 case snd_soc_dapm_input:
172 case snd_soc_dapm_output:
173 dapm_mark_dirty(w, "Rechecking inputs and outputs");
180 mutex_unlock(&card->dapm_mutex);
182 EXPORT_SYMBOL_GPL(dapm_mark_io_dirty);
184 /* create a new dapm widget */
185 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
186 const struct snd_soc_dapm_widget *_widget)
188 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
191 struct dapm_kcontrol_data {
193 struct snd_soc_dapm_widget *widget;
194 struct list_head paths;
195 struct snd_soc_dapm_widget_list *wlist;
198 static int dapm_kcontrol_data_alloc(struct snd_soc_dapm_widget *widget,
199 struct snd_kcontrol *kcontrol)
201 struct dapm_kcontrol_data *data;
202 struct soc_mixer_control *mc;
204 data = kzalloc(sizeof(*data), GFP_KERNEL);
206 dev_err(widget->dapm->dev,
207 "ASoC: can't allocate kcontrol data for %s\n",
212 INIT_LIST_HEAD(&data->paths);
214 switch (widget->id) {
215 case snd_soc_dapm_switch:
216 case snd_soc_dapm_mixer:
217 case snd_soc_dapm_mixer_named_ctl:
218 mc = (struct soc_mixer_control *)kcontrol->private_value;
220 if (mc->autodisable) {
221 struct snd_soc_dapm_widget template;
223 memset(&template, 0, sizeof(template));
224 template.reg = mc->reg;
225 template.mask = (1 << fls(mc->max)) - 1;
226 template.shift = mc->shift;
228 template.off_val = mc->max;
230 template.off_val = 0;
231 template.on_val = template.off_val;
232 template.id = snd_soc_dapm_kcontrol;
233 template.name = kcontrol->id.name;
235 data->value = template.on_val;
237 data->widget = snd_soc_dapm_new_control(widget->dapm,
249 kcontrol->private_data = data;
254 static void dapm_kcontrol_free(struct snd_kcontrol *kctl)
256 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kctl);
261 static struct snd_soc_dapm_widget_list *dapm_kcontrol_get_wlist(
262 const struct snd_kcontrol *kcontrol)
264 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
269 static int dapm_kcontrol_add_widget(struct snd_kcontrol *kcontrol,
270 struct snd_soc_dapm_widget *widget)
272 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
273 struct snd_soc_dapm_widget_list *new_wlist;
277 n = data->wlist->num_widgets + 1;
281 new_wlist = krealloc(data->wlist,
282 sizeof(*new_wlist) + sizeof(widget) * n, GFP_KERNEL);
286 new_wlist->widgets[n - 1] = widget;
287 new_wlist->num_widgets = n;
289 data->wlist = new_wlist;
294 static void dapm_kcontrol_add_path(const struct snd_kcontrol *kcontrol,
295 struct snd_soc_dapm_path *path)
297 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
299 list_add_tail(&path->list_kcontrol, &data->paths);
302 snd_soc_dapm_add_path(data->widget->dapm, data->widget,
303 path->source, NULL, NULL);
307 static bool dapm_kcontrol_is_powered(const struct snd_kcontrol *kcontrol)
309 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
314 return data->widget->power;
317 static struct list_head *dapm_kcontrol_get_path_list(
318 const struct snd_kcontrol *kcontrol)
320 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
325 #define dapm_kcontrol_for_each_path(path, kcontrol) \
326 list_for_each_entry(path, dapm_kcontrol_get_path_list(kcontrol), \
329 unsigned int dapm_kcontrol_get_value(const struct snd_kcontrol *kcontrol)
331 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
335 EXPORT_SYMBOL_GPL(dapm_kcontrol_get_value);
337 static bool dapm_kcontrol_set_value(const struct snd_kcontrol *kcontrol,
340 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
342 if (data->value == value)
346 data->widget->on_val = value;
354 * snd_soc_dapm_kcontrol_dapm() - Returns the dapm context associated to a
356 * @kcontrol: The kcontrol
358 * Note: This function must only be used on kcontrols that are known to have
359 * been registered for a CODEC. Otherwise the behaviour is undefined.
361 struct snd_soc_dapm_context *snd_soc_dapm_kcontrol_dapm(
362 struct snd_kcontrol *kcontrol)
364 return dapm_kcontrol_get_wlist(kcontrol)->widgets[0]->dapm;
366 EXPORT_SYMBOL_GPL(snd_soc_dapm_kcontrol_dapm);
369 * snd_soc_dapm_kcontrol_codec() - Returns the codec associated to a kcontrol
370 * @kcontrol: The kcontrol
372 struct snd_soc_codec *snd_soc_dapm_kcontrol_codec(struct snd_kcontrol *kcontrol)
374 return snd_soc_dapm_to_codec(snd_soc_dapm_kcontrol_dapm(kcontrol));
376 EXPORT_SYMBOL_GPL(snd_soc_dapm_kcontrol_codec);
378 static void dapm_reset(struct snd_soc_card *card)
380 struct snd_soc_dapm_widget *w;
382 lockdep_assert_held(&card->dapm_mutex);
384 memset(&card->dapm_stats, 0, sizeof(card->dapm_stats));
386 list_for_each_entry(w, &card->widgets, list) {
387 w->new_power = w->power;
388 w->power_checked = false;
394 static const char *soc_dapm_prefix(struct snd_soc_dapm_context *dapm)
396 if (!dapm->component)
398 return dapm->component->name_prefix;
401 static int soc_dapm_read(struct snd_soc_dapm_context *dapm, int reg,
404 if (!dapm->component)
406 return snd_soc_component_read(dapm->component, reg, value);
409 static int soc_dapm_update_bits(struct snd_soc_dapm_context *dapm,
410 int reg, unsigned int mask, unsigned int value)
412 if (!dapm->component)
414 return snd_soc_component_update_bits_async(dapm->component, reg,
418 static int soc_dapm_test_bits(struct snd_soc_dapm_context *dapm,
419 int reg, unsigned int mask, unsigned int value)
421 if (!dapm->component)
423 return snd_soc_component_test_bits(dapm->component, reg, mask, value);
426 static void soc_dapm_async_complete(struct snd_soc_dapm_context *dapm)
429 snd_soc_component_async_complete(dapm->component);
433 * snd_soc_dapm_set_bias_level - set the bias level for the system
434 * @dapm: DAPM context
435 * @level: level to configure
437 * Configure the bias (power) levels for the SoC audio device.
439 * Returns 0 for success else error.
441 static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm,
442 enum snd_soc_bias_level level)
444 struct snd_soc_card *card = dapm->card;
447 trace_snd_soc_bias_level_start(card, level);
449 if (card && card->set_bias_level)
450 ret = card->set_bias_level(card, dapm, level);
454 if (dapm->set_bias_level)
455 ret = dapm->set_bias_level(dapm, level);
456 else if (!card || dapm != &card->dapm)
457 dapm->bias_level = level;
462 if (card && card->set_bias_level_post)
463 ret = card->set_bias_level_post(card, dapm, level);
465 trace_snd_soc_bias_level_done(card, level);
470 /* connect mux widget to its interconnecting audio paths */
471 static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
472 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
473 struct snd_soc_dapm_path *path, const char *control_name,
474 const struct snd_kcontrol_new *kcontrol)
476 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
477 unsigned int val, item;
480 if (e->reg != SND_SOC_NOPM) {
481 soc_dapm_read(dapm, e->reg, &val);
482 val = (val >> e->shift_l) & e->mask;
483 item = snd_soc_enum_val_to_item(e, val);
485 /* since a virtual mux has no backing registers to
486 * decide which path to connect, it will try to match
487 * with the first enumeration. This is to ensure
488 * that the default mux choice (the first) will be
489 * correctly powered up during initialization.
494 for (i = 0; i < e->items; i++) {
495 if (!(strcmp(control_name, e->texts[i]))) {
496 list_add(&path->list, &dapm->card->paths);
497 list_add(&path->list_sink, &dest->sources);
498 list_add(&path->list_source, &src->sinks);
499 path->name = e->texts[i];
511 /* set up initial codec paths */
512 static void dapm_set_mixer_path_status(struct snd_soc_dapm_widget *w,
513 struct snd_soc_dapm_path *p, int i)
515 struct soc_mixer_control *mc = (struct soc_mixer_control *)
516 w->kcontrol_news[i].private_value;
517 unsigned int reg = mc->reg;
518 unsigned int shift = mc->shift;
519 unsigned int max = mc->max;
520 unsigned int mask = (1 << fls(max)) - 1;
521 unsigned int invert = mc->invert;
524 if (reg != SND_SOC_NOPM) {
525 soc_dapm_read(w->dapm, reg, &val);
526 val = (val >> shift) & mask;
535 /* connect mixer widget to its interconnecting audio paths */
536 static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
537 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
538 struct snd_soc_dapm_path *path, const char *control_name)
542 /* search for mixer kcontrol */
543 for (i = 0; i < dest->num_kcontrols; i++) {
544 if (!strcmp(control_name, dest->kcontrol_news[i].name)) {
545 list_add(&path->list, &dapm->card->paths);
546 list_add(&path->list_sink, &dest->sources);
547 list_add(&path->list_source, &src->sinks);
548 path->name = dest->kcontrol_news[i].name;
549 dapm_set_mixer_path_status(dest, path, i);
556 static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm,
557 struct snd_soc_dapm_widget *kcontrolw,
558 const struct snd_kcontrol_new *kcontrol_new,
559 struct snd_kcontrol **kcontrol)
561 struct snd_soc_dapm_widget *w;
566 list_for_each_entry(w, &dapm->card->widgets, list) {
567 if (w == kcontrolw || w->dapm != kcontrolw->dapm)
569 for (i = 0; i < w->num_kcontrols; i++) {
570 if (&w->kcontrol_news[i] == kcontrol_new) {
572 *kcontrol = w->kcontrols[i];
582 * Determine if a kcontrol is shared. If it is, look it up. If it isn't,
583 * create it. Either way, add the widget into the control's widget list
585 static int dapm_create_or_share_mixmux_kcontrol(struct snd_soc_dapm_widget *w,
588 struct snd_soc_dapm_context *dapm = w->dapm;
589 struct snd_card *card = dapm->card->snd_card;
593 struct snd_kcontrol *kcontrol;
594 bool wname_in_long_name, kcname_in_long_name;
595 char *long_name = NULL;
599 prefix = soc_dapm_prefix(dapm);
601 prefix_len = strlen(prefix) + 1;
605 shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[kci],
610 wname_in_long_name = false;
611 kcname_in_long_name = true;
614 case snd_soc_dapm_switch:
615 case snd_soc_dapm_mixer:
616 wname_in_long_name = true;
617 kcname_in_long_name = true;
619 case snd_soc_dapm_mixer_named_ctl:
620 wname_in_long_name = false;
621 kcname_in_long_name = true;
623 case snd_soc_dapm_mux:
624 wname_in_long_name = true;
625 kcname_in_long_name = false;
632 if (wname_in_long_name && kcname_in_long_name) {
634 * The control will get a prefix from the control
635 * creation process but we're also using the same
636 * prefix for widgets so cut the prefix off the
637 * front of the widget name.
639 long_name = kasprintf(GFP_KERNEL, "%s %s",
640 w->name + prefix_len,
641 w->kcontrol_news[kci].name);
642 if (long_name == NULL)
646 } else if (wname_in_long_name) {
648 name = w->name + prefix_len;
651 name = w->kcontrol_news[kci].name;
654 kcontrol = snd_soc_cnew(&w->kcontrol_news[kci], NULL, name,
661 kcontrol->private_free = dapm_kcontrol_free;
663 ret = dapm_kcontrol_data_alloc(w, kcontrol);
665 snd_ctl_free_one(kcontrol);
669 ret = snd_ctl_add(card, kcontrol);
672 "ASoC: failed to add widget %s dapm kcontrol %s: %d\n",
678 ret = dapm_kcontrol_add_widget(kcontrol, w);
680 w->kcontrols[kci] = kcontrol;
688 /* create new dapm mixer control */
689 static int dapm_new_mixer(struct snd_soc_dapm_widget *w)
692 struct snd_soc_dapm_path *path;
695 for (i = 0; i < w->num_kcontrols; i++) {
697 list_for_each_entry(path, &w->sources, list_sink) {
698 /* mixer/mux paths name must match control name */
699 if (path->name != (char *)w->kcontrol_news[i].name)
702 if (w->kcontrols[i]) {
703 dapm_kcontrol_add_path(w->kcontrols[i], path);
707 ret = dapm_create_or_share_mixmux_kcontrol(w, i);
711 dapm_kcontrol_add_path(w->kcontrols[i], path);
718 /* create new dapm mux control */
719 static int dapm_new_mux(struct snd_soc_dapm_widget *w)
721 struct snd_soc_dapm_context *dapm = w->dapm;
722 struct snd_soc_dapm_path *path;
725 if (w->num_kcontrols != 1) {
727 "ASoC: mux %s has incorrect number of controls\n",
732 if (list_empty(&w->sources)) {
733 dev_err(dapm->dev, "ASoC: mux %s has no paths\n", w->name);
737 ret = dapm_create_or_share_mixmux_kcontrol(w, 0);
741 list_for_each_entry(path, &w->sources, list_sink)
742 dapm_kcontrol_add_path(w->kcontrols[0], path);
747 /* create new dapm volume control */
748 static int dapm_new_pga(struct snd_soc_dapm_widget *w)
750 if (w->num_kcontrols)
751 dev_err(w->dapm->dev,
752 "ASoC: PGA controls not supported: '%s'\n", w->name);
757 /* reset 'walked' bit for each dapm path */
758 static void dapm_clear_walk_output(struct snd_soc_dapm_context *dapm,
759 struct list_head *sink)
761 struct snd_soc_dapm_path *p;
763 list_for_each_entry(p, sink, list_source) {
766 dapm_clear_walk_output(dapm, &p->sink->sinks);
771 static void dapm_clear_walk_input(struct snd_soc_dapm_context *dapm,
772 struct list_head *source)
774 struct snd_soc_dapm_path *p;
776 list_for_each_entry(p, source, list_sink) {
779 dapm_clear_walk_input(dapm, &p->source->sources);
785 /* We implement power down on suspend by checking the power state of
786 * the ALSA card - when we are suspending the ALSA state for the card
789 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
791 int level = snd_power_get_state(widget->dapm->card->snd_card);
794 case SNDRV_CTL_POWER_D3hot:
795 case SNDRV_CTL_POWER_D3cold:
796 if (widget->ignore_suspend)
797 dev_dbg(widget->dapm->dev, "ASoC: %s ignoring suspend\n",
799 return widget->ignore_suspend;
805 /* add widget to list if it's not already in the list */
806 static int dapm_list_add_widget(struct snd_soc_dapm_widget_list **list,
807 struct snd_soc_dapm_widget *w)
809 struct snd_soc_dapm_widget_list *wlist;
810 int wlistsize, wlistentries, i;
817 /* is this widget already in the list */
818 for (i = 0; i < wlist->num_widgets; i++) {
819 if (wlist->widgets[i] == w)
823 /* allocate some new space */
824 wlistentries = wlist->num_widgets + 1;
825 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
826 wlistentries * sizeof(struct snd_soc_dapm_widget *);
827 *list = krealloc(wlist, wlistsize, GFP_KERNEL);
829 dev_err(w->dapm->dev, "ASoC: can't allocate widget list for %s\n",
835 /* insert the widget */
836 dev_dbg(w->dapm->dev, "ASoC: added %s in widget list pos %d\n",
837 w->name, wlist->num_widgets);
839 wlist->widgets[wlist->num_widgets] = w;
840 wlist->num_widgets++;
845 * Recursively check for a completed path to an active or physically connected
846 * output widget. Returns number of complete paths.
848 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget,
849 struct snd_soc_dapm_widget_list **list)
851 struct snd_soc_dapm_path *path;
854 if (widget->outputs >= 0)
855 return widget->outputs;
857 DAPM_UPDATE_STAT(widget, path_checks);
859 switch (widget->id) {
860 case snd_soc_dapm_supply:
861 case snd_soc_dapm_regulator_supply:
862 case snd_soc_dapm_clock_supply:
863 case snd_soc_dapm_kcontrol:
869 switch (widget->id) {
870 case snd_soc_dapm_adc:
871 case snd_soc_dapm_aif_out:
872 case snd_soc_dapm_dai_out:
873 if (widget->active) {
874 widget->outputs = snd_soc_dapm_suspend_check(widget);
875 return widget->outputs;
881 if (widget->connected) {
882 /* connected pin ? */
883 if (widget->id == snd_soc_dapm_output && !widget->ext) {
884 widget->outputs = snd_soc_dapm_suspend_check(widget);
885 return widget->outputs;
888 /* connected jack or spk ? */
889 if (widget->id == snd_soc_dapm_hp ||
890 widget->id == snd_soc_dapm_spk ||
891 (widget->id == snd_soc_dapm_line &&
892 !list_empty(&widget->sources))) {
893 widget->outputs = snd_soc_dapm_suspend_check(widget);
894 return widget->outputs;
898 list_for_each_entry(path, &widget->sinks, list_source) {
899 DAPM_UPDATE_STAT(widget, neighbour_checks);
910 trace_snd_soc_dapm_output_path(widget, path);
916 /* do we need to add this widget to the list ? */
919 err = dapm_list_add_widget(list, path->sink);
921 dev_err(widget->dapm->dev,
922 "ASoC: could not add widget %s\n",
929 con += is_connected_output_ep(path->sink, list);
935 widget->outputs = con;
941 * Recursively check for a completed path to an active or physically connected
942 * input widget. Returns number of complete paths.
944 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget,
945 struct snd_soc_dapm_widget_list **list)
947 struct snd_soc_dapm_path *path;
950 if (widget->inputs >= 0)
951 return widget->inputs;
953 DAPM_UPDATE_STAT(widget, path_checks);
955 switch (widget->id) {
956 case snd_soc_dapm_supply:
957 case snd_soc_dapm_regulator_supply:
958 case snd_soc_dapm_clock_supply:
959 case snd_soc_dapm_kcontrol:
965 /* active stream ? */
966 switch (widget->id) {
967 case snd_soc_dapm_dac:
968 case snd_soc_dapm_aif_in:
969 case snd_soc_dapm_dai_in:
970 if (widget->active) {
971 widget->inputs = snd_soc_dapm_suspend_check(widget);
972 return widget->inputs;
978 if (widget->connected) {
979 /* connected pin ? */
980 if (widget->id == snd_soc_dapm_input && !widget->ext) {
981 widget->inputs = snd_soc_dapm_suspend_check(widget);
982 return widget->inputs;
985 /* connected VMID/Bias for lower pops */
986 if (widget->id == snd_soc_dapm_vmid) {
987 widget->inputs = snd_soc_dapm_suspend_check(widget);
988 return widget->inputs;
991 /* connected jack ? */
992 if (widget->id == snd_soc_dapm_mic ||
993 (widget->id == snd_soc_dapm_line &&
994 !list_empty(&widget->sinks))) {
995 widget->inputs = snd_soc_dapm_suspend_check(widget);
996 return widget->inputs;
999 /* signal generator */
1000 if (widget->id == snd_soc_dapm_siggen) {
1001 widget->inputs = snd_soc_dapm_suspend_check(widget);
1002 return widget->inputs;
1006 list_for_each_entry(path, &widget->sources, list_sink) {
1007 DAPM_UPDATE_STAT(widget, neighbour_checks);
1018 trace_snd_soc_dapm_input_path(widget, path);
1020 if (path->connect) {
1024 /* do we need to add this widget to the list ? */
1027 err = dapm_list_add_widget(list, path->source);
1029 dev_err(widget->dapm->dev,
1030 "ASoC: could not add widget %s\n",
1037 con += is_connected_input_ep(path->source, list);
1043 widget->inputs = con;
1049 * snd_soc_dapm_get_connected_widgets - query audio path and it's widgets.
1050 * @dai: the soc DAI.
1051 * @stream: stream direction.
1052 * @list: list of active widgets for this stream.
1054 * Queries DAPM graph as to whether an valid audio stream path exists for
1055 * the initial stream specified by name. This takes into account
1056 * current mixer and mux kcontrol settings. Creates list of valid widgets.
1058 * Returns the number of valid paths or negative error.
1060 int snd_soc_dapm_dai_get_connected_widgets(struct snd_soc_dai *dai, int stream,
1061 struct snd_soc_dapm_widget_list **list)
1063 struct snd_soc_card *card = dai->card;
1066 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
1069 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1070 paths = is_connected_output_ep(dai->playback_widget, list);
1071 dapm_clear_walk_output(&card->dapm,
1072 &dai->playback_widget->sinks);
1074 paths = is_connected_input_ep(dai->capture_widget, list);
1075 dapm_clear_walk_input(&card->dapm,
1076 &dai->capture_widget->sources);
1079 trace_snd_soc_dapm_connected(paths, stream);
1080 mutex_unlock(&card->dapm_mutex);
1086 * Handler for regulator supply widget.
1088 int dapm_regulator_event(struct snd_soc_dapm_widget *w,
1089 struct snd_kcontrol *kcontrol, int event)
1093 soc_dapm_async_complete(w->dapm);
1095 if (SND_SOC_DAPM_EVENT_ON(event)) {
1096 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
1097 ret = regulator_allow_bypass(w->regulator, false);
1099 dev_warn(w->dapm->dev,
1100 "ASoC: Failed to unbypass %s: %d\n",
1104 return regulator_enable(w->regulator);
1106 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
1107 ret = regulator_allow_bypass(w->regulator, true);
1109 dev_warn(w->dapm->dev,
1110 "ASoC: Failed to bypass %s: %d\n",
1114 return regulator_disable_deferred(w->regulator, w->shift);
1117 EXPORT_SYMBOL_GPL(dapm_regulator_event);
1120 * Handler for clock supply widget.
1122 int dapm_clock_event(struct snd_soc_dapm_widget *w,
1123 struct snd_kcontrol *kcontrol, int event)
1128 soc_dapm_async_complete(w->dapm);
1130 #ifdef CONFIG_HAVE_CLK
1131 if (SND_SOC_DAPM_EVENT_ON(event)) {
1132 return clk_prepare_enable(w->clk);
1134 clk_disable_unprepare(w->clk);
1140 EXPORT_SYMBOL_GPL(dapm_clock_event);
1142 static int dapm_widget_power_check(struct snd_soc_dapm_widget *w)
1144 if (w->power_checked)
1145 return w->new_power;
1150 w->new_power = w->power_check(w);
1152 w->power_checked = true;
1154 return w->new_power;
1157 /* Generic check to see if a widget should be powered.
1159 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
1163 DAPM_UPDATE_STAT(w, power_checks);
1165 in = is_connected_input_ep(w, NULL);
1166 dapm_clear_walk_input(w->dapm, &w->sources);
1167 out = is_connected_output_ep(w, NULL);
1168 dapm_clear_walk_output(w->dapm, &w->sinks);
1169 return out != 0 && in != 0;
1172 /* Check to see if an ADC has power */
1173 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
1177 DAPM_UPDATE_STAT(w, power_checks);
1180 in = is_connected_input_ep(w, NULL);
1181 dapm_clear_walk_input(w->dapm, &w->sources);
1184 return dapm_generic_check_power(w);
1188 /* Check to see if a DAC has power */
1189 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
1193 DAPM_UPDATE_STAT(w, power_checks);
1196 out = is_connected_output_ep(w, NULL);
1197 dapm_clear_walk_output(w->dapm, &w->sinks);
1200 return dapm_generic_check_power(w);
1204 /* Check to see if a power supply is needed */
1205 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
1207 struct snd_soc_dapm_path *path;
1209 DAPM_UPDATE_STAT(w, power_checks);
1211 /* Check if one of our outputs is connected */
1212 list_for_each_entry(path, &w->sinks, list_source) {
1213 DAPM_UPDATE_STAT(w, neighbour_checks);
1218 if (path->connected &&
1219 !path->connected(path->source, path->sink))
1222 if (dapm_widget_power_check(path->sink))
1229 static int dapm_always_on_check_power(struct snd_soc_dapm_widget *w)
1234 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
1235 struct snd_soc_dapm_widget *b,
1243 sort = dapm_down_seq;
1245 if (sort[a->id] != sort[b->id])
1246 return sort[a->id] - sort[b->id];
1247 if (a->subseq != b->subseq) {
1249 return a->subseq - b->subseq;
1251 return b->subseq - a->subseq;
1253 if (a->reg != b->reg)
1254 return a->reg - b->reg;
1255 if (a->dapm != b->dapm)
1256 return (unsigned long)a->dapm - (unsigned long)b->dapm;
1261 /* Insert a widget in order into a DAPM power sequence. */
1262 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
1263 struct list_head *list,
1266 struct snd_soc_dapm_widget *w;
1268 list_for_each_entry(w, list, power_list)
1269 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
1270 list_add_tail(&new_widget->power_list, &w->power_list);
1274 list_add_tail(&new_widget->power_list, list);
1277 static void dapm_seq_check_event(struct snd_soc_card *card,
1278 struct snd_soc_dapm_widget *w, int event)
1280 const char *ev_name;
1284 case SND_SOC_DAPM_PRE_PMU:
1285 ev_name = "PRE_PMU";
1288 case SND_SOC_DAPM_POST_PMU:
1289 ev_name = "POST_PMU";
1292 case SND_SOC_DAPM_PRE_PMD:
1293 ev_name = "PRE_PMD";
1296 case SND_SOC_DAPM_POST_PMD:
1297 ev_name = "POST_PMD";
1300 case SND_SOC_DAPM_WILL_PMU:
1301 ev_name = "WILL_PMU";
1304 case SND_SOC_DAPM_WILL_PMD:
1305 ev_name = "WILL_PMD";
1309 WARN(1, "Unknown event %d\n", event);
1313 if (w->new_power != power)
1316 if (w->event && (w->event_flags & event)) {
1317 pop_dbg(w->dapm->dev, card->pop_time, "pop test : %s %s\n",
1319 soc_dapm_async_complete(w->dapm);
1320 trace_snd_soc_dapm_widget_event_start(w, event);
1321 ret = w->event(w, NULL, event);
1322 trace_snd_soc_dapm_widget_event_done(w, event);
1324 dev_err(w->dapm->dev, "ASoC: %s: %s event failed: %d\n",
1325 ev_name, w->name, ret);
1329 /* Apply the coalesced changes from a DAPM sequence */
1330 static void dapm_seq_run_coalesced(struct snd_soc_card *card,
1331 struct list_head *pending)
1333 struct snd_soc_dapm_context *dapm;
1334 struct snd_soc_dapm_widget *w;
1336 unsigned int value = 0;
1337 unsigned int mask = 0;
1339 w = list_first_entry(pending, struct snd_soc_dapm_widget, power_list);
1343 list_for_each_entry(w, pending, power_list) {
1344 WARN_ON(reg != w->reg || dapm != w->dapm);
1345 w->power = w->new_power;
1347 mask |= w->mask << w->shift;
1349 value |= w->on_val << w->shift;
1351 value |= w->off_val << w->shift;
1353 pop_dbg(dapm->dev, card->pop_time,
1354 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
1355 w->name, reg, value, mask);
1357 /* Check for events */
1358 dapm_seq_check_event(card, w, SND_SOC_DAPM_PRE_PMU);
1359 dapm_seq_check_event(card, w, SND_SOC_DAPM_PRE_PMD);
1363 /* Any widget will do, they should all be updating the
1367 pop_dbg(dapm->dev, card->pop_time,
1368 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
1369 value, mask, reg, card->pop_time);
1370 pop_wait(card->pop_time);
1371 soc_dapm_update_bits(dapm, reg, mask, value);
1374 list_for_each_entry(w, pending, power_list) {
1375 dapm_seq_check_event(card, w, SND_SOC_DAPM_POST_PMU);
1376 dapm_seq_check_event(card, w, SND_SOC_DAPM_POST_PMD);
1380 /* Apply a DAPM power sequence.
1382 * We walk over a pre-sorted list of widgets to apply power to. In
1383 * order to minimise the number of writes to the device required
1384 * multiple widgets will be updated in a single write where possible.
1385 * Currently anything that requires more than a single write is not
1388 static void dapm_seq_run(struct snd_soc_card *card,
1389 struct list_head *list, int event, bool power_up)
1391 struct snd_soc_dapm_widget *w, *n;
1392 struct snd_soc_dapm_context *d;
1395 int cur_subseq = -1;
1396 int cur_reg = SND_SOC_NOPM;
1397 struct snd_soc_dapm_context *cur_dapm = NULL;
1404 sort = dapm_down_seq;
1406 list_for_each_entry_safe(w, n, list, power_list) {
1409 /* Do we need to apply any queued changes? */
1410 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
1411 w->dapm != cur_dapm || w->subseq != cur_subseq) {
1412 if (!list_empty(&pending))
1413 dapm_seq_run_coalesced(card, &pending);
1415 if (cur_dapm && cur_dapm->seq_notifier) {
1416 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1417 if (sort[i] == cur_sort)
1418 cur_dapm->seq_notifier(cur_dapm,
1423 if (cur_dapm && w->dapm != cur_dapm)
1424 soc_dapm_async_complete(cur_dapm);
1426 INIT_LIST_HEAD(&pending);
1428 cur_subseq = INT_MIN;
1429 cur_reg = SND_SOC_NOPM;
1434 case snd_soc_dapm_pre:
1436 list_for_each_entry_safe_continue(w, n, list,
1439 if (event == SND_SOC_DAPM_STREAM_START)
1441 NULL, SND_SOC_DAPM_PRE_PMU);
1442 else if (event == SND_SOC_DAPM_STREAM_STOP)
1444 NULL, SND_SOC_DAPM_PRE_PMD);
1447 case snd_soc_dapm_post:
1449 list_for_each_entry_safe_continue(w, n, list,
1452 if (event == SND_SOC_DAPM_STREAM_START)
1454 NULL, SND_SOC_DAPM_POST_PMU);
1455 else if (event == SND_SOC_DAPM_STREAM_STOP)
1457 NULL, SND_SOC_DAPM_POST_PMD);
1461 /* Queue it up for application */
1462 cur_sort = sort[w->id];
1463 cur_subseq = w->subseq;
1466 list_move(&w->power_list, &pending);
1471 dev_err(w->dapm->dev,
1472 "ASoC: Failed to apply widget power: %d\n", ret);
1475 if (!list_empty(&pending))
1476 dapm_seq_run_coalesced(card, &pending);
1478 if (cur_dapm && cur_dapm->seq_notifier) {
1479 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1480 if (sort[i] == cur_sort)
1481 cur_dapm->seq_notifier(cur_dapm,
1485 list_for_each_entry(d, &card->dapm_list, list) {
1486 soc_dapm_async_complete(d);
1490 static void dapm_widget_update(struct snd_soc_card *card)
1492 struct snd_soc_dapm_update *update = card->update;
1493 struct snd_soc_dapm_widget_list *wlist;
1494 struct snd_soc_dapm_widget *w = NULL;
1498 if (!update || !dapm_kcontrol_is_powered(update->kcontrol))
1501 wlist = dapm_kcontrol_get_wlist(update->kcontrol);
1503 for (wi = 0; wi < wlist->num_widgets; wi++) {
1504 w = wlist->widgets[wi];
1506 if (w->event && (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
1507 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
1509 dev_err(w->dapm->dev, "ASoC: %s DAPM pre-event failed: %d\n",
1517 ret = soc_dapm_update_bits(w->dapm, update->reg, update->mask,
1520 dev_err(w->dapm->dev, "ASoC: %s DAPM update failed: %d\n",
1523 for (wi = 0; wi < wlist->num_widgets; wi++) {
1524 w = wlist->widgets[wi];
1526 if (w->event && (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1527 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1529 dev_err(w->dapm->dev, "ASoC: %s DAPM post-event failed: %d\n",
1535 /* Async callback run prior to DAPM sequences - brings to _PREPARE if
1536 * they're changing state.
1538 static void dapm_pre_sequence_async(void *data, async_cookie_t cookie)
1540 struct snd_soc_dapm_context *d = data;
1543 /* If we're off and we're not supposed to be go into STANDBY */
1544 if (d->bias_level == SND_SOC_BIAS_OFF &&
1545 d->target_bias_level != SND_SOC_BIAS_OFF) {
1547 pm_runtime_get_sync(d->dev);
1549 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1552 "ASoC: Failed to turn on bias: %d\n", ret);
1555 /* Prepare for a transition to ON or away from ON */
1556 if ((d->target_bias_level == SND_SOC_BIAS_ON &&
1557 d->bias_level != SND_SOC_BIAS_ON) ||
1558 (d->target_bias_level != SND_SOC_BIAS_ON &&
1559 d->bias_level == SND_SOC_BIAS_ON)) {
1560 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);
1563 "ASoC: Failed to prepare bias: %d\n", ret);
1567 /* Async callback run prior to DAPM sequences - brings to their final
1570 static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
1572 struct snd_soc_dapm_context *d = data;
1575 /* If we just powered the last thing off drop to standby bias */
1576 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1577 (d->target_bias_level == SND_SOC_BIAS_STANDBY ||
1578 d->target_bias_level == SND_SOC_BIAS_OFF)) {
1579 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1581 dev_err(d->dev, "ASoC: Failed to apply standby bias: %d\n",
1585 /* If we're in standby and can support bias off then do that */
1586 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1587 d->target_bias_level == SND_SOC_BIAS_OFF) {
1588 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);
1590 dev_err(d->dev, "ASoC: Failed to turn off bias: %d\n",
1594 pm_runtime_put(d->dev);
1597 /* If we just powered up then move to active bias */
1598 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1599 d->target_bias_level == SND_SOC_BIAS_ON) {
1600 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);
1602 dev_err(d->dev, "ASoC: Failed to apply active bias: %d\n",
1607 static void dapm_widget_set_peer_power(struct snd_soc_dapm_widget *peer,
1608 bool power, bool connect)
1610 /* If a connection is being made or broken then that update
1611 * will have marked the peer dirty, otherwise the widgets are
1612 * not connected and this update has no impact. */
1616 /* If the peer is already in the state we're moving to then we
1617 * won't have an impact on it. */
1618 if (power != peer->power)
1619 dapm_mark_dirty(peer, "peer state change");
1622 static void dapm_widget_set_power(struct snd_soc_dapm_widget *w, bool power,
1623 struct list_head *up_list,
1624 struct list_head *down_list)
1626 struct snd_soc_dapm_path *path;
1628 if (w->power == power)
1631 trace_snd_soc_dapm_widget_power(w, power);
1633 /* If we changed our power state perhaps our neigbours changed
1636 list_for_each_entry(path, &w->sources, list_sink)
1637 dapm_widget_set_peer_power(path->source, power, path->connect);
1640 case snd_soc_dapm_supply:
1641 case snd_soc_dapm_regulator_supply:
1642 case snd_soc_dapm_clock_supply:
1643 case snd_soc_dapm_kcontrol:
1644 /* Supplies can't affect their outputs, only their inputs */
1647 list_for_each_entry(path, &w->sinks, list_source)
1648 dapm_widget_set_peer_power(path->sink, power,
1654 dapm_seq_insert(w, up_list, true);
1656 dapm_seq_insert(w, down_list, false);
1659 static void dapm_power_one_widget(struct snd_soc_dapm_widget *w,
1660 struct list_head *up_list,
1661 struct list_head *down_list)
1666 case snd_soc_dapm_pre:
1667 dapm_seq_insert(w, down_list, false);
1669 case snd_soc_dapm_post:
1670 dapm_seq_insert(w, up_list, true);
1674 power = dapm_widget_power_check(w);
1676 dapm_widget_set_power(w, power, up_list, down_list);
1681 static bool dapm_idle_bias_off(struct snd_soc_dapm_context *dapm)
1683 if (dapm->idle_bias_off)
1686 switch (snd_power_get_state(dapm->card->snd_card)) {
1687 case SNDRV_CTL_POWER_D3hot:
1688 case SNDRV_CTL_POWER_D3cold:
1689 return dapm->suspend_bias_off;
1698 * Scan each dapm widget for complete audio path.
1699 * A complete path is a route that has valid endpoints i.e.:-
1701 * o DAC to output pin.
1702 * o Input Pin to ADC.
1703 * o Input pin to Output pin (bypass, sidetone)
1704 * o DAC to ADC (loopback).
1706 static int dapm_power_widgets(struct snd_soc_card *card, int event)
1708 struct snd_soc_dapm_widget *w;
1709 struct snd_soc_dapm_context *d;
1711 LIST_HEAD(down_list);
1712 ASYNC_DOMAIN_EXCLUSIVE(async_domain);
1713 enum snd_soc_bias_level bias;
1715 lockdep_assert_held(&card->dapm_mutex);
1717 trace_snd_soc_dapm_start(card);
1719 list_for_each_entry(d, &card->dapm_list, list) {
1720 if (dapm_idle_bias_off(d))
1721 d->target_bias_level = SND_SOC_BIAS_OFF;
1723 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1728 /* Check which widgets we need to power and store them in
1729 * lists indicating if they should be powered up or down. We
1730 * only check widgets that have been flagged as dirty but note
1731 * that new widgets may be added to the dirty list while we
1734 list_for_each_entry(w, &card->dapm_dirty, dirty) {
1735 dapm_power_one_widget(w, &up_list, &down_list);
1738 list_for_each_entry(w, &card->widgets, list) {
1740 case snd_soc_dapm_pre:
1741 case snd_soc_dapm_post:
1742 /* These widgets always need to be powered */
1745 list_del_init(&w->dirty);
1752 /* Supplies and micbiases only bring the
1753 * context up to STANDBY as unless something
1754 * else is active and passing audio they
1755 * generally don't require full power. Signal
1756 * generators are virtual pins and have no
1757 * power impact themselves.
1760 case snd_soc_dapm_siggen:
1761 case snd_soc_dapm_vmid:
1763 case snd_soc_dapm_supply:
1764 case snd_soc_dapm_regulator_supply:
1765 case snd_soc_dapm_clock_supply:
1766 case snd_soc_dapm_micbias:
1767 if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
1768 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1771 d->target_bias_level = SND_SOC_BIAS_ON;
1778 /* Force all contexts in the card to the same bias state if
1779 * they're not ground referenced.
1781 bias = SND_SOC_BIAS_OFF;
1782 list_for_each_entry(d, &card->dapm_list, list)
1783 if (d->target_bias_level > bias)
1784 bias = d->target_bias_level;
1785 list_for_each_entry(d, &card->dapm_list, list)
1786 if (!dapm_idle_bias_off(d))
1787 d->target_bias_level = bias;
1789 trace_snd_soc_dapm_walk_done(card);
1791 /* Run card bias changes at first */
1792 dapm_pre_sequence_async(&card->dapm, 0);
1793 /* Run other bias changes in parallel */
1794 list_for_each_entry(d, &card->dapm_list, list) {
1795 if (d != &card->dapm)
1796 async_schedule_domain(dapm_pre_sequence_async, d,
1799 async_synchronize_full_domain(&async_domain);
1801 list_for_each_entry(w, &down_list, power_list) {
1802 dapm_seq_check_event(card, w, SND_SOC_DAPM_WILL_PMD);
1805 list_for_each_entry(w, &up_list, power_list) {
1806 dapm_seq_check_event(card, w, SND_SOC_DAPM_WILL_PMU);
1809 /* Power down widgets first; try to avoid amplifying pops. */
1810 dapm_seq_run(card, &down_list, event, false);
1812 dapm_widget_update(card);
1815 dapm_seq_run(card, &up_list, event, true);
1817 /* Run all the bias changes in parallel */
1818 list_for_each_entry(d, &card->dapm_list, list) {
1819 if (d != &card->dapm)
1820 async_schedule_domain(dapm_post_sequence_async, d,
1823 async_synchronize_full_domain(&async_domain);
1824 /* Run card bias changes at last */
1825 dapm_post_sequence_async(&card->dapm, 0);
1827 /* do we need to notify any clients that DAPM event is complete */
1828 list_for_each_entry(d, &card->dapm_list, list) {
1829 if (d->stream_event)
1830 d->stream_event(d, event);
1833 pop_dbg(card->dev, card->pop_time,
1834 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
1835 pop_wait(card->pop_time);
1837 trace_snd_soc_dapm_done(card);
1842 #ifdef CONFIG_DEBUG_FS
1843 static ssize_t dapm_widget_power_read_file(struct file *file,
1844 char __user *user_buf,
1845 size_t count, loff_t *ppos)
1847 struct snd_soc_dapm_widget *w = file->private_data;
1851 struct snd_soc_dapm_path *p = NULL;
1853 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1857 in = is_connected_input_ep(w, NULL);
1858 dapm_clear_walk_input(w->dapm, &w->sources);
1859 out = is_connected_output_ep(w, NULL);
1860 dapm_clear_walk_output(w->dapm, &w->sinks);
1862 ret = snprintf(buf, PAGE_SIZE, "%s: %s%s in %d out %d",
1863 w->name, w->power ? "On" : "Off",
1864 w->force ? " (forced)" : "", in, out);
1867 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1868 " - R%d(0x%x) mask 0x%x",
1869 w->reg, w->reg, w->mask << w->shift);
1871 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1874 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1876 w->active ? "active" : "inactive");
1878 list_for_each_entry(p, &w->sources, list_sink) {
1879 if (p->connected && !p->connected(w, p->source))
1883 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1884 " in \"%s\" \"%s\"\n",
1885 p->name ? p->name : "static",
1888 list_for_each_entry(p, &w->sinks, list_source) {
1889 if (p->connected && !p->connected(w, p->sink))
1893 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1894 " out \"%s\" \"%s\"\n",
1895 p->name ? p->name : "static",
1899 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1905 static const struct file_operations dapm_widget_power_fops = {
1906 .open = simple_open,
1907 .read = dapm_widget_power_read_file,
1908 .llseek = default_llseek,
1911 static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
1912 size_t count, loff_t *ppos)
1914 struct snd_soc_dapm_context *dapm = file->private_data;
1917 switch (dapm->bias_level) {
1918 case SND_SOC_BIAS_ON:
1921 case SND_SOC_BIAS_PREPARE:
1922 level = "Prepare\n";
1924 case SND_SOC_BIAS_STANDBY:
1925 level = "Standby\n";
1927 case SND_SOC_BIAS_OFF:
1931 WARN(1, "Unknown bias_level %d\n", dapm->bias_level);
1932 level = "Unknown\n";
1936 return simple_read_from_buffer(user_buf, count, ppos, level,
1940 static const struct file_operations dapm_bias_fops = {
1941 .open = simple_open,
1942 .read = dapm_bias_read_file,
1943 .llseek = default_llseek,
1946 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1947 struct dentry *parent)
1951 dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
1953 if (!dapm->debugfs_dapm) {
1955 "ASoC: Failed to create DAPM debugfs directory\n");
1959 d = debugfs_create_file("bias_level", 0444,
1960 dapm->debugfs_dapm, dapm,
1964 "ASoC: Failed to create bias level debugfs file\n");
1967 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1969 struct snd_soc_dapm_context *dapm = w->dapm;
1972 if (!dapm->debugfs_dapm || !w->name)
1975 d = debugfs_create_file(w->name, 0444,
1976 dapm->debugfs_dapm, w,
1977 &dapm_widget_power_fops);
1979 dev_warn(w->dapm->dev,
1980 "ASoC: Failed to create %s debugfs file\n",
1984 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1986 debugfs_remove_recursive(dapm->debugfs_dapm);
1990 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1991 struct dentry *parent)
1995 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1999 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
2005 /* test and update the power status of a mux widget */
2006 static int soc_dapm_mux_update_power(struct snd_soc_card *card,
2007 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e)
2009 struct snd_soc_dapm_path *path;
2012 lockdep_assert_held(&card->dapm_mutex);
2014 /* find dapm widget path assoc with kcontrol */
2015 dapm_kcontrol_for_each_path(path, kcontrol) {
2016 if (!path->name || !e->texts[mux])
2020 /* we now need to match the string in the enum to the path */
2021 if (!(strcmp(path->name, e->texts[mux]))) {
2022 path->connect = 1; /* new connection */
2023 dapm_mark_dirty(path->source, "mux connection");
2026 dapm_mark_dirty(path->source,
2027 "mux disconnection");
2028 path->connect = 0; /* old connection must be powered down */
2030 dapm_mark_dirty(path->sink, "mux change");
2034 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2039 int snd_soc_dapm_mux_update_power(struct snd_soc_dapm_context *dapm,
2040 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e,
2041 struct snd_soc_dapm_update *update)
2043 struct snd_soc_card *card = dapm->card;
2046 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2047 card->update = update;
2048 ret = soc_dapm_mux_update_power(card, kcontrol, mux, e);
2049 card->update = NULL;
2050 mutex_unlock(&card->dapm_mutex);
2052 soc_dpcm_runtime_update(card);
2055 EXPORT_SYMBOL_GPL(snd_soc_dapm_mux_update_power);
2057 /* test and update the power status of a mixer or switch widget */
2058 static int soc_dapm_mixer_update_power(struct snd_soc_card *card,
2059 struct snd_kcontrol *kcontrol, int connect)
2061 struct snd_soc_dapm_path *path;
2064 lockdep_assert_held(&card->dapm_mutex);
2066 /* find dapm widget path assoc with kcontrol */
2067 dapm_kcontrol_for_each_path(path, kcontrol) {
2069 path->connect = connect;
2070 dapm_mark_dirty(path->source, "mixer connection");
2071 dapm_mark_dirty(path->sink, "mixer update");
2075 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2080 int snd_soc_dapm_mixer_update_power(struct snd_soc_dapm_context *dapm,
2081 struct snd_kcontrol *kcontrol, int connect,
2082 struct snd_soc_dapm_update *update)
2084 struct snd_soc_card *card = dapm->card;
2087 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2088 card->update = update;
2089 ret = soc_dapm_mixer_update_power(card, kcontrol, connect);
2090 card->update = NULL;
2091 mutex_unlock(&card->dapm_mutex);
2093 soc_dpcm_runtime_update(card);
2096 EXPORT_SYMBOL_GPL(snd_soc_dapm_mixer_update_power);
2098 static ssize_t dapm_widget_show_codec(struct snd_soc_codec *codec, char *buf)
2100 struct snd_soc_dapm_widget *w;
2102 char *state = "not set";
2104 list_for_each_entry(w, &codec->component.card->widgets, list) {
2105 if (w->dapm != &codec->dapm)
2108 /* only display widgets that burnm power */
2110 case snd_soc_dapm_hp:
2111 case snd_soc_dapm_mic:
2112 case snd_soc_dapm_spk:
2113 case snd_soc_dapm_line:
2114 case snd_soc_dapm_micbias:
2115 case snd_soc_dapm_dac:
2116 case snd_soc_dapm_adc:
2117 case snd_soc_dapm_pga:
2118 case snd_soc_dapm_out_drv:
2119 case snd_soc_dapm_mixer:
2120 case snd_soc_dapm_mixer_named_ctl:
2121 case snd_soc_dapm_supply:
2122 case snd_soc_dapm_regulator_supply:
2123 case snd_soc_dapm_clock_supply:
2125 count += sprintf(buf + count, "%s: %s\n",
2126 w->name, w->power ? "On":"Off");
2133 switch (codec->dapm.bias_level) {
2134 case SND_SOC_BIAS_ON:
2137 case SND_SOC_BIAS_PREPARE:
2140 case SND_SOC_BIAS_STANDBY:
2143 case SND_SOC_BIAS_OFF:
2147 count += sprintf(buf + count, "PM State: %s\n", state);
2152 /* show dapm widget status in sys fs */
2153 static ssize_t dapm_widget_show(struct device *dev,
2154 struct device_attribute *attr, char *buf)
2156 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
2159 for (i = 0; i < rtd->num_codecs; i++) {
2160 struct snd_soc_codec *codec = rtd->codec_dais[i]->codec;
2161 count += dapm_widget_show_codec(codec, buf + count);
2167 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
2169 int snd_soc_dapm_sys_add(struct device *dev)
2171 return device_create_file(dev, &dev_attr_dapm_widget);
2174 static void snd_soc_dapm_sys_remove(struct device *dev)
2176 device_remove_file(dev, &dev_attr_dapm_widget);
2179 static void dapm_free_path(struct snd_soc_dapm_path *path)
2181 list_del(&path->list_sink);
2182 list_del(&path->list_source);
2183 list_del(&path->list_kcontrol);
2184 list_del(&path->list);
2188 /* free all dapm widgets and resources */
2189 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
2191 struct snd_soc_dapm_widget *w, *next_w;
2192 struct snd_soc_dapm_path *p, *next_p;
2194 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
2195 if (w->dapm != dapm)
2199 * remove source and sink paths associated to this widget.
2200 * While removing the path, remove reference to it from both
2201 * source and sink widgets so that path is removed only once.
2203 list_for_each_entry_safe(p, next_p, &w->sources, list_sink)
2206 list_for_each_entry_safe(p, next_p, &w->sinks, list_source)
2209 kfree(w->kcontrols);
2215 static struct snd_soc_dapm_widget *dapm_find_widget(
2216 struct snd_soc_dapm_context *dapm, const char *pin,
2217 bool search_other_contexts)
2219 struct snd_soc_dapm_widget *w;
2220 struct snd_soc_dapm_widget *fallback = NULL;
2222 list_for_each_entry(w, &dapm->card->widgets, list) {
2223 if (!strcmp(w->name, pin)) {
2224 if (w->dapm == dapm)
2231 if (search_other_contexts)
2237 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
2238 const char *pin, int status)
2240 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2242 dapm_assert_locked(dapm);
2245 dev_err(dapm->dev, "ASoC: DAPM unknown pin %s\n", pin);
2249 if (w->connected != status)
2250 dapm_mark_dirty(w, "pin configuration");
2252 w->connected = status;
2260 * snd_soc_dapm_sync_unlocked - scan and power dapm paths
2261 * @dapm: DAPM context
2263 * Walks all dapm audio paths and powers widgets according to their
2264 * stream or path usage.
2266 * Requires external locking.
2268 * Returns 0 for success.
2270 int snd_soc_dapm_sync_unlocked(struct snd_soc_dapm_context *dapm)
2273 * Suppress early reports (eg, jacks syncing their state) to avoid
2274 * silly DAPM runs during card startup.
2276 if (!dapm->card || !dapm->card->instantiated)
2279 return dapm_power_widgets(dapm->card, SND_SOC_DAPM_STREAM_NOP);
2281 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync_unlocked);
2284 * snd_soc_dapm_sync - scan and power dapm paths
2285 * @dapm: DAPM context
2287 * Walks all dapm audio paths and powers widgets according to their
2288 * stream or path usage.
2290 * Returns 0 for success.
2292 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
2296 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2297 ret = snd_soc_dapm_sync_unlocked(dapm);
2298 mutex_unlock(&dapm->card->dapm_mutex);
2301 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
2303 static int snd_soc_dapm_add_path(struct snd_soc_dapm_context *dapm,
2304 struct snd_soc_dapm_widget *wsource, struct snd_soc_dapm_widget *wsink,
2305 const char *control,
2306 int (*connected)(struct snd_soc_dapm_widget *source,
2307 struct snd_soc_dapm_widget *sink))
2309 struct snd_soc_dapm_path *path;
2312 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
2316 path->source = wsource;
2318 path->connected = connected;
2319 INIT_LIST_HEAD(&path->list);
2320 INIT_LIST_HEAD(&path->list_kcontrol);
2321 INIT_LIST_HEAD(&path->list_source);
2322 INIT_LIST_HEAD(&path->list_sink);
2324 /* check for external widgets */
2325 if (wsink->id == snd_soc_dapm_input) {
2326 if (wsource->id == snd_soc_dapm_micbias ||
2327 wsource->id == snd_soc_dapm_mic ||
2328 wsource->id == snd_soc_dapm_line ||
2329 wsource->id == snd_soc_dapm_output)
2332 if (wsource->id == snd_soc_dapm_output) {
2333 if (wsink->id == snd_soc_dapm_spk ||
2334 wsink->id == snd_soc_dapm_hp ||
2335 wsink->id == snd_soc_dapm_line ||
2336 wsink->id == snd_soc_dapm_input)
2340 dapm_mark_dirty(wsource, "Route added");
2341 dapm_mark_dirty(wsink, "Route added");
2343 /* connect static paths */
2344 if (control == NULL) {
2345 list_add(&path->list, &dapm->card->paths);
2346 list_add(&path->list_sink, &wsink->sources);
2347 list_add(&path->list_source, &wsource->sinks);
2352 /* connect dynamic paths */
2353 switch (wsink->id) {
2354 case snd_soc_dapm_adc:
2355 case snd_soc_dapm_dac:
2356 case snd_soc_dapm_pga:
2357 case snd_soc_dapm_out_drv:
2358 case snd_soc_dapm_input:
2359 case snd_soc_dapm_output:
2360 case snd_soc_dapm_siggen:
2361 case snd_soc_dapm_micbias:
2362 case snd_soc_dapm_vmid:
2363 case snd_soc_dapm_pre:
2364 case snd_soc_dapm_post:
2365 case snd_soc_dapm_supply:
2366 case snd_soc_dapm_regulator_supply:
2367 case snd_soc_dapm_clock_supply:
2368 case snd_soc_dapm_aif_in:
2369 case snd_soc_dapm_aif_out:
2370 case snd_soc_dapm_dai_in:
2371 case snd_soc_dapm_dai_out:
2372 case snd_soc_dapm_dai_link:
2373 case snd_soc_dapm_kcontrol:
2374 list_add(&path->list, &dapm->card->paths);
2375 list_add(&path->list_sink, &wsink->sources);
2376 list_add(&path->list_source, &wsource->sinks);
2379 case snd_soc_dapm_mux:
2380 ret = dapm_connect_mux(dapm, wsource, wsink, path, control,
2381 &wsink->kcontrol_news[0]);
2385 case snd_soc_dapm_switch:
2386 case snd_soc_dapm_mixer:
2387 case snd_soc_dapm_mixer_named_ctl:
2388 ret = dapm_connect_mixer(dapm, wsource, wsink, path, control);
2392 case snd_soc_dapm_hp:
2393 case snd_soc_dapm_mic:
2394 case snd_soc_dapm_line:
2395 case snd_soc_dapm_spk:
2396 list_add(&path->list, &dapm->card->paths);
2397 list_add(&path->list_sink, &wsink->sources);
2398 list_add(&path->list_source, &wsource->sinks);
2409 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
2410 const struct snd_soc_dapm_route *route)
2412 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
2413 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
2416 char prefixed_sink[80];
2417 char prefixed_source[80];
2421 prefix = soc_dapm_prefix(dapm);
2423 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
2424 prefix, route->sink);
2425 sink = prefixed_sink;
2426 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
2427 prefix, route->source);
2428 source = prefixed_source;
2431 source = route->source;
2435 * find src and dest widgets over all widgets but favor a widget from
2436 * current DAPM context
2438 list_for_each_entry(w, &dapm->card->widgets, list) {
2439 if (!wsink && !(strcmp(w->name, sink))) {
2441 if (w->dapm == dapm)
2445 if (!wsource && !(strcmp(w->name, source))) {
2447 if (w->dapm == dapm)
2451 /* use widget from another DAPM context if not found from this */
2457 if (wsource == NULL) {
2458 dev_err(dapm->dev, "ASoC: no source widget found for %s\n",
2462 if (wsink == NULL) {
2463 dev_err(dapm->dev, "ASoC: no sink widget found for %s\n",
2468 ret = snd_soc_dapm_add_path(dapm, wsource, wsink, route->control,
2475 dev_warn(dapm->dev, "ASoC: no dapm match for %s --> %s --> %s\n",
2476 source, route->control, sink);
2480 static int snd_soc_dapm_del_route(struct snd_soc_dapm_context *dapm,
2481 const struct snd_soc_dapm_route *route)
2483 struct snd_soc_dapm_path *path, *p;
2486 char prefixed_sink[80];
2487 char prefixed_source[80];
2490 if (route->control) {
2492 "ASoC: Removal of routes with controls not supported\n");
2496 prefix = soc_dapm_prefix(dapm);
2498 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
2499 prefix, route->sink);
2500 sink = prefixed_sink;
2501 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
2502 prefix, route->source);
2503 source = prefixed_source;
2506 source = route->source;
2510 list_for_each_entry(p, &dapm->card->paths, list) {
2511 if (strcmp(p->source->name, source) != 0)
2513 if (strcmp(p->sink->name, sink) != 0)
2520 dapm_mark_dirty(path->source, "Route removed");
2521 dapm_mark_dirty(path->sink, "Route removed");
2523 dapm_free_path(path);
2525 dev_warn(dapm->dev, "ASoC: Route %s->%s does not exist\n",
2533 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
2534 * @dapm: DAPM context
2535 * @route: audio routes
2536 * @num: number of routes
2538 * Connects 2 dapm widgets together via a named audio path. The sink is
2539 * the widget receiving the audio signal, whilst the source is the sender
2540 * of the audio signal.
2542 * Returns 0 for success else error. On error all resources can be freed
2543 * with a call to snd_soc_card_free().
2545 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
2546 const struct snd_soc_dapm_route *route, int num)
2550 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2551 for (i = 0; i < num; i++) {
2552 r = snd_soc_dapm_add_route(dapm, route);
2554 dev_err(dapm->dev, "ASoC: Failed to add route %s -> %s -> %s\n",
2556 route->control ? route->control : "direct",
2562 mutex_unlock(&dapm->card->dapm_mutex);
2566 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
2569 * snd_soc_dapm_del_routes - Remove routes between DAPM widgets
2570 * @dapm: DAPM context
2571 * @route: audio routes
2572 * @num: number of routes
2574 * Removes routes from the DAPM context.
2576 int snd_soc_dapm_del_routes(struct snd_soc_dapm_context *dapm,
2577 const struct snd_soc_dapm_route *route, int num)
2581 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2582 for (i = 0; i < num; i++) {
2583 snd_soc_dapm_del_route(dapm, route);
2586 mutex_unlock(&dapm->card->dapm_mutex);
2590 EXPORT_SYMBOL_GPL(snd_soc_dapm_del_routes);
2592 static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm,
2593 const struct snd_soc_dapm_route *route)
2595 struct snd_soc_dapm_widget *source = dapm_find_widget(dapm,
2598 struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm,
2601 struct snd_soc_dapm_path *path;
2605 dev_err(dapm->dev, "ASoC: Unable to find source %s for weak route\n",
2611 dev_err(dapm->dev, "ASoC: Unable to find sink %s for weak route\n",
2616 if (route->control || route->connected)
2617 dev_warn(dapm->dev, "ASoC: Ignoring control for weak route %s->%s\n",
2618 route->source, route->sink);
2620 list_for_each_entry(path, &source->sinks, list_source) {
2621 if (path->sink == sink) {
2628 dev_err(dapm->dev, "ASoC: No path found for weak route %s->%s\n",
2629 route->source, route->sink);
2631 dev_warn(dapm->dev, "ASoC: %d paths found for weak route %s->%s\n",
2632 count, route->source, route->sink);
2638 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
2639 * @dapm: DAPM context
2640 * @route: audio routes
2641 * @num: number of routes
2643 * Mark existing routes matching those specified in the passed array
2644 * as being weak, meaning that they are ignored for the purpose of
2645 * power decisions. The main intended use case is for sidetone paths
2646 * which couple audio between other independent paths if they are both
2647 * active in order to make the combination work better at the user
2648 * level but which aren't intended to be "used".
2650 * Note that CODEC drivers should not use this as sidetone type paths
2651 * can frequently also be used as bypass paths.
2653 int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm,
2654 const struct snd_soc_dapm_route *route, int num)
2659 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2660 for (i = 0; i < num; i++) {
2661 err = snd_soc_dapm_weak_route(dapm, route);
2666 mutex_unlock(&dapm->card->dapm_mutex);
2670 EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes);
2673 * snd_soc_dapm_new_widgets - add new dapm widgets
2674 * @dapm: DAPM context
2676 * Checks the codec for any new dapm widgets and creates them if found.
2678 * Returns 0 for success.
2680 int snd_soc_dapm_new_widgets(struct snd_soc_card *card)
2682 struct snd_soc_dapm_widget *w;
2685 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2687 list_for_each_entry(w, &card->widgets, list)
2692 if (w->num_kcontrols) {
2693 w->kcontrols = kzalloc(w->num_kcontrols *
2694 sizeof(struct snd_kcontrol *),
2696 if (!w->kcontrols) {
2697 mutex_unlock(&card->dapm_mutex);
2703 case snd_soc_dapm_switch:
2704 case snd_soc_dapm_mixer:
2705 case snd_soc_dapm_mixer_named_ctl:
2708 case snd_soc_dapm_mux:
2711 case snd_soc_dapm_pga:
2712 case snd_soc_dapm_out_drv:
2719 /* Read the initial power state from the device */
2721 soc_dapm_read(w->dapm, w->reg, &val);
2722 val = val >> w->shift;
2724 if (val == w->on_val)
2730 dapm_mark_dirty(w, "new widget");
2731 dapm_debugfs_add_widget(w);
2734 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2735 mutex_unlock(&card->dapm_mutex);
2738 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
2741 * snd_soc_dapm_get_volsw - dapm mixer get callback
2742 * @kcontrol: mixer control
2743 * @ucontrol: control element information
2745 * Callback to get the value of a dapm mixer control.
2747 * Returns 0 for success.
2749 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
2750 struct snd_ctl_elem_value *ucontrol)
2752 struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
2753 struct snd_soc_card *card = dapm->card;
2754 struct soc_mixer_control *mc =
2755 (struct soc_mixer_control *)kcontrol->private_value;
2757 unsigned int shift = mc->shift;
2759 unsigned int mask = (1 << fls(max)) - 1;
2760 unsigned int invert = mc->invert;
2764 if (snd_soc_volsw_is_stereo(mc))
2766 "ASoC: Control '%s' is stereo, which is not supported\n",
2769 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2770 if (dapm_kcontrol_is_powered(kcontrol) && reg != SND_SOC_NOPM) {
2771 ret = soc_dapm_read(dapm, reg, &val);
2772 val = (val >> shift) & mask;
2774 val = dapm_kcontrol_get_value(kcontrol);
2776 mutex_unlock(&card->dapm_mutex);
2779 ucontrol->value.integer.value[0] = max - val;
2781 ucontrol->value.integer.value[0] = val;
2785 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
2788 * snd_soc_dapm_put_volsw - dapm mixer set callback
2789 * @kcontrol: mixer control
2790 * @ucontrol: control element information
2792 * Callback to set the value of a dapm mixer control.
2794 * Returns 0 for success.
2796 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
2797 struct snd_ctl_elem_value *ucontrol)
2799 struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
2800 struct snd_soc_card *card = dapm->card;
2801 struct soc_mixer_control *mc =
2802 (struct soc_mixer_control *)kcontrol->private_value;
2804 unsigned int shift = mc->shift;
2806 unsigned int mask = (1 << fls(max)) - 1;
2807 unsigned int invert = mc->invert;
2809 int connect, change, reg_change = 0;
2810 struct snd_soc_dapm_update update;
2813 if (snd_soc_volsw_is_stereo(mc))
2815 "ASoC: Control '%s' is stereo, which is not supported\n",
2818 val = (ucontrol->value.integer.value[0] & mask);
2824 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2826 change = dapm_kcontrol_set_value(kcontrol, val);
2828 if (reg != SND_SOC_NOPM) {
2829 mask = mask << shift;
2832 reg_change = soc_dapm_test_bits(dapm, reg, mask, val);
2835 if (change || reg_change) {
2837 update.kcontrol = kcontrol;
2841 card->update = &update;
2843 change |= reg_change;
2845 ret = soc_dapm_mixer_update_power(card, kcontrol, connect);
2847 card->update = NULL;
2850 mutex_unlock(&card->dapm_mutex);
2853 soc_dpcm_runtime_update(card);
2857 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
2860 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
2861 * @kcontrol: mixer control
2862 * @ucontrol: control element information
2864 * Callback to get the value of a dapm enumerated double mixer control.
2866 * Returns 0 for success.
2868 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
2869 struct snd_ctl_elem_value *ucontrol)
2871 struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
2872 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2873 unsigned int reg_val, val;
2875 if (e->reg != SND_SOC_NOPM) {
2876 int ret = soc_dapm_read(dapm, e->reg, ®_val);
2880 reg_val = dapm_kcontrol_get_value(kcontrol);
2883 val = (reg_val >> e->shift_l) & e->mask;
2884 ucontrol->value.enumerated.item[0] = snd_soc_enum_val_to_item(e, val);
2885 if (e->shift_l != e->shift_r) {
2886 val = (reg_val >> e->shift_r) & e->mask;
2887 val = snd_soc_enum_val_to_item(e, val);
2888 ucontrol->value.enumerated.item[1] = val;
2893 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
2896 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
2897 * @kcontrol: mixer control
2898 * @ucontrol: control element information
2900 * Callback to set the value of a dapm enumerated double mixer control.
2902 * Returns 0 for success.
2904 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
2905 struct snd_ctl_elem_value *ucontrol)
2907 struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
2908 struct snd_soc_card *card = dapm->card;
2909 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2910 unsigned int *item = ucontrol->value.enumerated.item;
2911 unsigned int val, change;
2913 struct snd_soc_dapm_update update;
2916 if (item[0] >= e->items)
2919 val = snd_soc_enum_item_to_val(e, item[0]) << e->shift_l;
2920 mask = e->mask << e->shift_l;
2921 if (e->shift_l != e->shift_r) {
2922 if (item[1] > e->items)
2924 val |= snd_soc_enum_item_to_val(e, item[1]) << e->shift_l;
2925 mask |= e->mask << e->shift_r;
2928 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2930 if (e->reg != SND_SOC_NOPM)
2931 change = soc_dapm_test_bits(dapm, e->reg, mask, val);
2933 change = dapm_kcontrol_set_value(kcontrol, val);
2936 if (e->reg != SND_SOC_NOPM) {
2937 update.kcontrol = kcontrol;
2938 update.reg = e->reg;
2941 card->update = &update;
2944 ret = soc_dapm_mux_update_power(card, kcontrol, item[0], e);
2946 card->update = NULL;
2949 mutex_unlock(&card->dapm_mutex);
2952 soc_dpcm_runtime_update(card);
2956 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
2959 * snd_soc_dapm_info_pin_switch - Info for a pin switch
2961 * @kcontrol: mixer control
2962 * @uinfo: control element information
2964 * Callback to provide information about a pin switch control.
2966 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
2967 struct snd_ctl_elem_info *uinfo)
2969 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2971 uinfo->value.integer.min = 0;
2972 uinfo->value.integer.max = 1;
2976 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
2979 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
2981 * @kcontrol: mixer control
2984 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
2985 struct snd_ctl_elem_value *ucontrol)
2987 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
2988 const char *pin = (const char *)kcontrol->private_value;
2990 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2992 ucontrol->value.integer.value[0] =
2993 snd_soc_dapm_get_pin_status(&card->dapm, pin);
2995 mutex_unlock(&card->dapm_mutex);
2999 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
3002 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
3004 * @kcontrol: mixer control
3007 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
3008 struct snd_ctl_elem_value *ucontrol)
3010 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
3011 const char *pin = (const char *)kcontrol->private_value;
3013 if (ucontrol->value.integer.value[0])
3014 snd_soc_dapm_enable_pin(&card->dapm, pin);
3016 snd_soc_dapm_disable_pin(&card->dapm, pin);
3018 snd_soc_dapm_sync(&card->dapm);
3021 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
3023 static struct snd_soc_dapm_widget *
3024 snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
3025 const struct snd_soc_dapm_widget *widget)
3027 struct snd_soc_dapm_widget *w;
3031 if ((w = dapm_cnew_widget(widget)) == NULL)
3035 case snd_soc_dapm_regulator_supply:
3036 w->regulator = devm_regulator_get(dapm->dev, w->name);
3037 if (IS_ERR(w->regulator)) {
3038 ret = PTR_ERR(w->regulator);
3039 dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n",
3044 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
3045 ret = regulator_allow_bypass(w->regulator, true);
3047 dev_warn(w->dapm->dev,
3048 "ASoC: Failed to bypass %s: %d\n",
3052 case snd_soc_dapm_clock_supply:
3053 #ifdef CONFIG_CLKDEV_LOOKUP
3054 w->clk = devm_clk_get(dapm->dev, w->name);
3055 if (IS_ERR(w->clk)) {
3056 ret = PTR_ERR(w->clk);
3057 dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n",
3069 prefix = soc_dapm_prefix(dapm);
3071 w->name = kasprintf(GFP_KERNEL, "%s %s", prefix, widget->name);
3073 w->name = kasprintf(GFP_KERNEL, "%s", widget->name);
3075 if (w->name == NULL) {
3081 case snd_soc_dapm_switch:
3082 case snd_soc_dapm_mixer:
3083 case snd_soc_dapm_mixer_named_ctl:
3084 w->power_check = dapm_generic_check_power;
3086 case snd_soc_dapm_mux:
3087 w->power_check = dapm_generic_check_power;
3089 case snd_soc_dapm_dai_out:
3090 w->power_check = dapm_adc_check_power;
3092 case snd_soc_dapm_dai_in:
3093 w->power_check = dapm_dac_check_power;
3095 case snd_soc_dapm_adc:
3096 case snd_soc_dapm_aif_out:
3097 case snd_soc_dapm_dac:
3098 case snd_soc_dapm_aif_in:
3099 case snd_soc_dapm_pga:
3100 case snd_soc_dapm_out_drv:
3101 case snd_soc_dapm_input:
3102 case snd_soc_dapm_output:
3103 case snd_soc_dapm_micbias:
3104 case snd_soc_dapm_spk:
3105 case snd_soc_dapm_hp:
3106 case snd_soc_dapm_mic:
3107 case snd_soc_dapm_line:
3108 case snd_soc_dapm_dai_link:
3109 w->power_check = dapm_generic_check_power;
3111 case snd_soc_dapm_supply:
3112 case snd_soc_dapm_regulator_supply:
3113 case snd_soc_dapm_clock_supply:
3114 case snd_soc_dapm_kcontrol:
3115 w->power_check = dapm_supply_check_power;
3118 w->power_check = dapm_always_on_check_power;
3123 if (dapm->component)
3124 w->codec = dapm->component->codec;
3125 INIT_LIST_HEAD(&w->sources);
3126 INIT_LIST_HEAD(&w->sinks);
3127 INIT_LIST_HEAD(&w->list);
3128 INIT_LIST_HEAD(&w->dirty);
3129 list_add(&w->list, &dapm->card->widgets);
3131 /* machine layer set ups unconnected pins and insertions */
3137 * snd_soc_dapm_new_controls - create new dapm controls
3138 * @dapm: DAPM context
3139 * @widget: widget array
3140 * @num: number of widgets
3142 * Creates new DAPM controls based upon the templates.
3144 * Returns 0 for success else error.
3146 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
3147 const struct snd_soc_dapm_widget *widget,
3150 struct snd_soc_dapm_widget *w;
3154 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
3155 for (i = 0; i < num; i++) {
3156 w = snd_soc_dapm_new_control(dapm, widget);
3159 "ASoC: Failed to create DAPM control %s\n",
3166 mutex_unlock(&dapm->card->dapm_mutex);
3169 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
3171 static int snd_soc_dai_link_event(struct snd_soc_dapm_widget *w,
3172 struct snd_kcontrol *kcontrol, int event)
3174 struct snd_soc_dapm_path *source_p, *sink_p;
3175 struct snd_soc_dai *source, *sink;
3176 const struct snd_soc_pcm_stream *config = w->params;
3177 struct snd_pcm_substream substream;
3178 struct snd_pcm_hw_params *params = NULL;
3182 if (WARN_ON(!config) ||
3183 WARN_ON(list_empty(&w->sources) || list_empty(&w->sinks)))
3186 /* We only support a single source and sink, pick the first */
3187 source_p = list_first_entry(&w->sources, struct snd_soc_dapm_path,
3189 sink_p = list_first_entry(&w->sinks, struct snd_soc_dapm_path,
3192 if (WARN_ON(!source_p || !sink_p) ||
3193 WARN_ON(!sink_p->source || !source_p->sink) ||
3194 WARN_ON(!source_p->source || !sink_p->sink))
3197 source = source_p->source->priv;
3198 sink = sink_p->sink->priv;
3200 /* Be a little careful as we don't want to overflow the mask array */
3201 if (config->formats) {
3202 fmt = ffs(config->formats) - 1;
3204 dev_warn(w->dapm->dev, "ASoC: Invalid format %llx specified\n",
3209 /* Currently very limited parameter selection */
3210 params = kzalloc(sizeof(*params), GFP_KERNEL);
3215 snd_mask_set(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), fmt);
3217 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->min =
3219 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->max =
3222 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->min
3223 = config->channels_min;
3224 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->max
3225 = config->channels_max;
3227 memset(&substream, 0, sizeof(substream));
3230 case SND_SOC_DAPM_PRE_PMU:
3231 substream.stream = SNDRV_PCM_STREAM_CAPTURE;
3232 ret = soc_dai_hw_params(&substream, params, source);
3236 substream.stream = SNDRV_PCM_STREAM_PLAYBACK;
3237 ret = soc_dai_hw_params(&substream, params, sink);
3242 case SND_SOC_DAPM_POST_PMU:
3243 ret = snd_soc_dai_digital_mute(sink, 0,
3244 SNDRV_PCM_STREAM_PLAYBACK);
3245 if (ret != 0 && ret != -ENOTSUPP)
3246 dev_warn(sink->dev, "ASoC: Failed to unmute: %d\n", ret);
3250 case SND_SOC_DAPM_PRE_PMD:
3251 ret = snd_soc_dai_digital_mute(sink, 1,
3252 SNDRV_PCM_STREAM_PLAYBACK);
3253 if (ret != 0 && ret != -ENOTSUPP)
3254 dev_warn(sink->dev, "ASoC: Failed to mute: %d\n", ret);
3259 WARN(1, "Unknown event %d\n", event);
3268 int snd_soc_dapm_new_pcm(struct snd_soc_card *card,
3269 const struct snd_soc_pcm_stream *params,
3270 struct snd_soc_dapm_widget *source,
3271 struct snd_soc_dapm_widget *sink)
3273 struct snd_soc_dapm_widget template;
3274 struct snd_soc_dapm_widget *w;
3279 len = strlen(source->name) + strlen(sink->name) + 2;
3280 link_name = devm_kzalloc(card->dev, len, GFP_KERNEL);
3283 snprintf(link_name, len, "%s-%s", source->name, sink->name);
3285 memset(&template, 0, sizeof(template));
3286 template.reg = SND_SOC_NOPM;
3287 template.id = snd_soc_dapm_dai_link;
3288 template.name = link_name;
3289 template.event = snd_soc_dai_link_event;
3290 template.event_flags = SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
3291 SND_SOC_DAPM_PRE_PMD;
3293 dev_dbg(card->dev, "ASoC: adding %s widget\n", link_name);
3295 w = snd_soc_dapm_new_control(&card->dapm, &template);
3297 dev_err(card->dev, "ASoC: Failed to create %s widget\n",
3304 ret = snd_soc_dapm_add_path(&card->dapm, source, w, NULL, NULL);
3307 return snd_soc_dapm_add_path(&card->dapm, w, sink, NULL, NULL);
3310 int snd_soc_dapm_new_dai_widgets(struct snd_soc_dapm_context *dapm,
3311 struct snd_soc_dai *dai)
3313 struct snd_soc_dapm_widget template;
3314 struct snd_soc_dapm_widget *w;
3316 WARN_ON(dapm->dev != dai->dev);
3318 memset(&template, 0, sizeof(template));
3319 template.reg = SND_SOC_NOPM;
3321 if (dai->driver->playback.stream_name) {
3322 template.id = snd_soc_dapm_dai_in;
3323 template.name = dai->driver->playback.stream_name;
3324 template.sname = dai->driver->playback.stream_name;
3326 dev_dbg(dai->dev, "ASoC: adding %s widget\n",
3329 w = snd_soc_dapm_new_control(dapm, &template);
3331 dev_err(dapm->dev, "ASoC: Failed to create %s widget\n",
3332 dai->driver->playback.stream_name);
3337 dai->playback_widget = w;
3340 if (dai->driver->capture.stream_name) {
3341 template.id = snd_soc_dapm_dai_out;
3342 template.name = dai->driver->capture.stream_name;
3343 template.sname = dai->driver->capture.stream_name;
3345 dev_dbg(dai->dev, "ASoC: adding %s widget\n",
3348 w = snd_soc_dapm_new_control(dapm, &template);
3350 dev_err(dapm->dev, "ASoC: Failed to create %s widget\n",
3351 dai->driver->capture.stream_name);
3356 dai->capture_widget = w;
3362 int snd_soc_dapm_link_dai_widgets(struct snd_soc_card *card)
3364 struct snd_soc_dapm_widget *dai_w, *w;
3365 struct snd_soc_dapm_widget *src, *sink;
3366 struct snd_soc_dai *dai;
3368 /* For each DAI widget... */
3369 list_for_each_entry(dai_w, &card->widgets, list) {
3370 switch (dai_w->id) {
3371 case snd_soc_dapm_dai_in:
3372 case snd_soc_dapm_dai_out:
3380 /* ...find all widgets with the same stream and link them */
3381 list_for_each_entry(w, &card->widgets, list) {
3382 if (w->dapm != dai_w->dapm)
3386 case snd_soc_dapm_dai_in:
3387 case snd_soc_dapm_dai_out:
3393 if (!w->sname || !strstr(w->sname, dai_w->name))
3396 if (dai_w->id == snd_soc_dapm_dai_in) {
3403 dev_dbg(dai->dev, "%s -> %s\n", src->name, sink->name);
3404 snd_soc_dapm_add_path(w->dapm, src, sink, NULL, NULL);
3411 static void dapm_connect_dai_link_widgets(struct snd_soc_card *card,
3412 struct snd_soc_pcm_runtime *rtd)
3414 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
3415 struct snd_soc_dapm_widget *sink, *source;
3418 for (i = 0; i < rtd->num_codecs; i++) {
3419 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
3421 /* there is no point in connecting BE DAI links with dummies */
3422 if (snd_soc_dai_is_dummy(codec_dai) ||
3423 snd_soc_dai_is_dummy(cpu_dai))
3426 /* connect BE DAI playback if widgets are valid */
3427 if (codec_dai->playback_widget && cpu_dai->playback_widget) {
3428 source = cpu_dai->playback_widget;
3429 sink = codec_dai->playback_widget;
3430 dev_dbg(rtd->dev, "connected DAI link %s:%s -> %s:%s\n",
3431 cpu_dai->component->name, source->name,
3432 codec_dai->component->name, sink->name);
3434 snd_soc_dapm_add_path(&card->dapm, source, sink,
3438 /* connect BE DAI capture if widgets are valid */
3439 if (codec_dai->capture_widget && cpu_dai->capture_widget) {
3440 source = codec_dai->capture_widget;
3441 sink = cpu_dai->capture_widget;
3442 dev_dbg(rtd->dev, "connected DAI link %s:%s -> %s:%s\n",
3443 codec_dai->component->name, source->name,
3444 cpu_dai->component->name, sink->name);
3446 snd_soc_dapm_add_path(&card->dapm, source, sink,
3452 static void soc_dapm_dai_stream_event(struct snd_soc_dai *dai, int stream,
3455 struct snd_soc_dapm_widget *w;
3457 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
3458 w = dai->playback_widget;
3460 w = dai->capture_widget;
3463 dapm_mark_dirty(w, "stream event");
3466 case SND_SOC_DAPM_STREAM_START:
3469 case SND_SOC_DAPM_STREAM_STOP:
3472 case SND_SOC_DAPM_STREAM_SUSPEND:
3473 case SND_SOC_DAPM_STREAM_RESUME:
3474 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
3475 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
3481 void snd_soc_dapm_connect_dai_link_widgets(struct snd_soc_card *card)
3483 struct snd_soc_pcm_runtime *rtd = card->rtd;
3486 /* for each BE DAI link... */
3487 for (i = 0; i < card->num_rtd; i++) {
3488 rtd = &card->rtd[i];
3491 * dynamic FE links have no fixed DAI mapping.
3492 * CODEC<->CODEC links have no direct connection.
3494 if (rtd->dai_link->dynamic || rtd->dai_link->params)
3497 dapm_connect_dai_link_widgets(card, rtd);
3501 static void soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
3506 soc_dapm_dai_stream_event(rtd->cpu_dai, stream, event);
3507 for (i = 0; i < rtd->num_codecs; i++)
3508 soc_dapm_dai_stream_event(rtd->codec_dais[i], stream, event);
3510 dapm_power_widgets(rtd->card, event);
3514 * snd_soc_dapm_stream_event - send a stream event to the dapm core
3515 * @rtd: PCM runtime data
3516 * @stream: stream name
3517 * @event: stream event
3519 * Sends a stream event to the dapm core. The core then makes any
3520 * necessary widget power changes.
3522 * Returns 0 for success else error.
3524 void snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
3527 struct snd_soc_card *card = rtd->card;
3529 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3530 soc_dapm_stream_event(rtd, stream, event);
3531 mutex_unlock(&card->dapm_mutex);
3535 * snd_soc_dapm_enable_pin_unlocked - enable pin.
3536 * @dapm: DAPM context
3539 * Enables input/output pin and its parents or children widgets iff there is
3540 * a valid audio route and active audio stream.
3542 * Requires external locking.
3544 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3545 * do any widget power switching.
3547 int snd_soc_dapm_enable_pin_unlocked(struct snd_soc_dapm_context *dapm,
3550 return snd_soc_dapm_set_pin(dapm, pin, 1);
3552 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin_unlocked);
3555 * snd_soc_dapm_enable_pin - enable pin.
3556 * @dapm: DAPM context
3559 * Enables input/output pin and its parents or children widgets iff there is
3560 * a valid audio route and active audio stream.
3562 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3563 * do any widget power switching.
3565 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
3569 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3571 ret = snd_soc_dapm_set_pin(dapm, pin, 1);
3573 mutex_unlock(&dapm->card->dapm_mutex);
3577 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
3580 * snd_soc_dapm_force_enable_pin_unlocked - force a pin to be enabled
3581 * @dapm: DAPM context
3584 * Enables input/output pin regardless of any other state. This is
3585 * intended for use with microphone bias supplies used in microphone
3588 * Requires external locking.
3590 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3591 * do any widget power switching.
3593 int snd_soc_dapm_force_enable_pin_unlocked(struct snd_soc_dapm_context *dapm,
3596 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
3599 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
3603 dev_dbg(w->dapm->dev, "ASoC: force enable pin %s\n", pin);
3606 dapm_mark_dirty(w, "force enable");
3610 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin_unlocked);
3613 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
3614 * @dapm: DAPM context
3617 * Enables input/output pin regardless of any other state. This is
3618 * intended for use with microphone bias supplies used in microphone
3621 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3622 * do any widget power switching.
3624 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
3629 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3631 ret = snd_soc_dapm_force_enable_pin_unlocked(dapm, pin);
3633 mutex_unlock(&dapm->card->dapm_mutex);
3637 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
3640 * snd_soc_dapm_disable_pin_unlocked - disable pin.
3641 * @dapm: DAPM context
3644 * Disables input/output pin and its parents or children widgets.
3646 * Requires external locking.
3648 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3649 * do any widget power switching.
3651 int snd_soc_dapm_disable_pin_unlocked(struct snd_soc_dapm_context *dapm,
3654 return snd_soc_dapm_set_pin(dapm, pin, 0);
3656 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin_unlocked);
3659 * snd_soc_dapm_disable_pin - disable pin.
3660 * @dapm: DAPM context
3663 * Disables input/output pin and its parents or children widgets.
3665 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3666 * do any widget power switching.
3668 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
3673 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3675 ret = snd_soc_dapm_set_pin(dapm, pin, 0);
3677 mutex_unlock(&dapm->card->dapm_mutex);
3681 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
3684 * snd_soc_dapm_nc_pin_unlocked - permanently disable pin.
3685 * @dapm: DAPM context
3688 * Marks the specified pin as being not connected, disabling it along
3689 * any parent or child widgets. At present this is identical to
3690 * snd_soc_dapm_disable_pin() but in future it will be extended to do
3691 * additional things such as disabling controls which only affect
3692 * paths through the pin.
3694 * Requires external locking.
3696 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3697 * do any widget power switching.
3699 int snd_soc_dapm_nc_pin_unlocked(struct snd_soc_dapm_context *dapm,
3702 return snd_soc_dapm_set_pin(dapm, pin, 0);
3704 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin_unlocked);
3707 * snd_soc_dapm_nc_pin - permanently disable pin.
3708 * @dapm: DAPM context
3711 * Marks the specified pin as being not connected, disabling it along
3712 * any parent or child widgets. At present this is identical to
3713 * snd_soc_dapm_disable_pin() but in future it will be extended to do
3714 * additional things such as disabling controls which only affect
3715 * paths through the pin.
3717 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3718 * do any widget power switching.
3720 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
3724 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3726 ret = snd_soc_dapm_set_pin(dapm, pin, 0);
3728 mutex_unlock(&dapm->card->dapm_mutex);
3732 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
3735 * snd_soc_dapm_get_pin_status - get audio pin status
3736 * @dapm: DAPM context
3737 * @pin: audio signal pin endpoint (or start point)
3739 * Get audio pin status - connected or disconnected.
3741 * Returns 1 for connected otherwise 0.
3743 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
3746 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
3749 return w->connected;
3753 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
3756 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
3757 * @dapm: DAPM context
3758 * @pin: audio signal pin endpoint (or start point)
3760 * Mark the given endpoint or pin as ignoring suspend. When the
3761 * system is disabled a path between two endpoints flagged as ignoring
3762 * suspend will not be disabled. The path must already be enabled via
3763 * normal means at suspend time, it will not be turned on if it was not
3766 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
3769 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
3772 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
3776 w->ignore_suspend = 1;
3780 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
3783 * dapm_is_external_path() - Checks if a path is a external path
3784 * @card: The card the path belongs to
3785 * @path: The path to check
3787 * Returns true if the path is either between two different DAPM contexts or
3788 * between two external pins of the same DAPM context. Otherwise returns
3791 static bool dapm_is_external_path(struct snd_soc_card *card,
3792 struct snd_soc_dapm_path *path)
3795 "... Path %s(id:%d dapm:%p) - %s(id:%d dapm:%p)\n",
3796 path->source->name, path->source->id, path->source->dapm,
3797 path->sink->name, path->sink->id, path->sink->dapm);
3799 /* Connection between two different DAPM contexts */
3800 if (path->source->dapm != path->sink->dapm)
3803 /* Loopback connection from external pin to external pin */
3804 if (path->sink->id == snd_soc_dapm_input) {
3805 switch (path->source->id) {
3806 case snd_soc_dapm_output:
3807 case snd_soc_dapm_micbias:
3817 static bool snd_soc_dapm_widget_in_card_paths(struct snd_soc_card *card,
3818 struct snd_soc_dapm_widget *w)
3820 struct snd_soc_dapm_path *p;
3822 list_for_each_entry(p, &w->sources, list_sink) {
3823 if (dapm_is_external_path(card, p))
3827 list_for_each_entry(p, &w->sinks, list_source) {
3828 if (dapm_is_external_path(card, p))
3836 * snd_soc_dapm_auto_nc_pins - call snd_soc_dapm_nc_pin for unused pins
3837 * @card: The card whose pins should be processed
3839 * Automatically call snd_soc_dapm_nc_pin() for any external pins in the card
3840 * which are unused. Pins are used if they are connected externally to a
3841 * component, whether that be to some other device, or a loop-back connection to
3842 * the component itself.
3844 void snd_soc_dapm_auto_nc_pins(struct snd_soc_card *card)
3846 struct snd_soc_dapm_widget *w;
3848 dev_dbg(card->dev, "ASoC: Auto NC: DAPMs: card:%p\n", &card->dapm);
3850 list_for_each_entry(w, &card->widgets, list) {
3852 case snd_soc_dapm_input:
3853 case snd_soc_dapm_output:
3854 case snd_soc_dapm_micbias:
3855 dev_dbg(card->dev, "ASoC: Auto NC: Checking widget %s\n",
3857 if (!snd_soc_dapm_widget_in_card_paths(card, w)) {
3859 "... Not in map; disabling\n");
3860 snd_soc_dapm_nc_pin(w->dapm, w->name);
3870 * snd_soc_dapm_free - free dapm resources
3871 * @dapm: DAPM context
3873 * Free all dapm widgets and resources.
3875 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
3877 snd_soc_dapm_sys_remove(dapm->dev);
3878 dapm_debugfs_cleanup(dapm);
3879 dapm_free_widgets(dapm);
3880 list_del(&dapm->list);
3882 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
3884 static void soc_dapm_shutdown_dapm(struct snd_soc_dapm_context *dapm)
3886 struct snd_soc_card *card = dapm->card;
3887 struct snd_soc_dapm_widget *w;
3888 LIST_HEAD(down_list);
3891 mutex_lock(&card->dapm_mutex);
3893 list_for_each_entry(w, &dapm->card->widgets, list) {
3894 if (w->dapm != dapm)
3897 dapm_seq_insert(w, &down_list, false);
3903 /* If there were no widgets to power down we're already in
3907 if (dapm->bias_level == SND_SOC_BIAS_ON)
3908 snd_soc_dapm_set_bias_level(dapm,
3909 SND_SOC_BIAS_PREPARE);
3910 dapm_seq_run(card, &down_list, 0, false);
3911 if (dapm->bias_level == SND_SOC_BIAS_PREPARE)
3912 snd_soc_dapm_set_bias_level(dapm,
3913 SND_SOC_BIAS_STANDBY);
3916 mutex_unlock(&card->dapm_mutex);
3920 * snd_soc_dapm_shutdown - callback for system shutdown
3922 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
3924 struct snd_soc_dapm_context *dapm;
3926 list_for_each_entry(dapm, &card->dapm_list, list) {
3927 if (dapm != &card->dapm) {
3928 soc_dapm_shutdown_dapm(dapm);
3929 if (dapm->bias_level == SND_SOC_BIAS_STANDBY)
3930 snd_soc_dapm_set_bias_level(dapm,
3935 soc_dapm_shutdown_dapm(&card->dapm);
3936 if (card->dapm.bias_level == SND_SOC_BIAS_STANDBY)
3937 snd_soc_dapm_set_bias_level(&card->dapm,
3941 /* Module information */
3942 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3943 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
3944 MODULE_LICENSE("GPL");