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 /* dapm power sequences - make this per codec in the future */
51 static int dapm_up_seq[] = {
52 [snd_soc_dapm_pre] = 0,
53 [snd_soc_dapm_supply] = 1,
54 [snd_soc_dapm_regulator_supply] = 1,
55 [snd_soc_dapm_clock_supply] = 1,
56 [snd_soc_dapm_micbias] = 2,
57 [snd_soc_dapm_dai_link] = 2,
58 [snd_soc_dapm_dai] = 3,
59 [snd_soc_dapm_aif_in] = 3,
60 [snd_soc_dapm_aif_out] = 3,
61 [snd_soc_dapm_mic] = 4,
62 [snd_soc_dapm_mux] = 5,
63 [snd_soc_dapm_virt_mux] = 5,
64 [snd_soc_dapm_value_mux] = 5,
65 [snd_soc_dapm_dac] = 6,
66 [snd_soc_dapm_mixer] = 7,
67 [snd_soc_dapm_mixer_named_ctl] = 7,
68 [snd_soc_dapm_pga] = 8,
69 [snd_soc_dapm_adc] = 9,
70 [snd_soc_dapm_out_drv] = 10,
71 [snd_soc_dapm_hp] = 10,
72 [snd_soc_dapm_spk] = 10,
73 [snd_soc_dapm_line] = 10,
74 [snd_soc_dapm_post] = 11,
77 static int dapm_down_seq[] = {
78 [snd_soc_dapm_pre] = 0,
79 [snd_soc_dapm_adc] = 1,
80 [snd_soc_dapm_hp] = 2,
81 [snd_soc_dapm_spk] = 2,
82 [snd_soc_dapm_line] = 2,
83 [snd_soc_dapm_out_drv] = 2,
84 [snd_soc_dapm_pga] = 4,
85 [snd_soc_dapm_mixer_named_ctl] = 5,
86 [snd_soc_dapm_mixer] = 5,
87 [snd_soc_dapm_dac] = 6,
88 [snd_soc_dapm_mic] = 7,
89 [snd_soc_dapm_micbias] = 8,
90 [snd_soc_dapm_mux] = 9,
91 [snd_soc_dapm_virt_mux] = 9,
92 [snd_soc_dapm_value_mux] = 9,
93 [snd_soc_dapm_aif_in] = 10,
94 [snd_soc_dapm_aif_out] = 10,
95 [snd_soc_dapm_dai] = 10,
96 [snd_soc_dapm_dai_link] = 11,
97 [snd_soc_dapm_clock_supply] = 12,
98 [snd_soc_dapm_regulator_supply] = 12,
99 [snd_soc_dapm_supply] = 12,
100 [snd_soc_dapm_post] = 13,
103 static void pop_wait(u32 pop_time)
106 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
109 static void pop_dbg(struct device *dev, u32 pop_time, const char *fmt, ...)
117 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
122 vsnprintf(buf, PAGE_SIZE, fmt, args);
123 dev_info(dev, "%s", buf);
129 static bool dapm_dirty_widget(struct snd_soc_dapm_widget *w)
131 return !list_empty(&w->dirty);
134 void dapm_mark_dirty(struct snd_soc_dapm_widget *w, const char *reason)
136 if (!dapm_dirty_widget(w)) {
137 dev_vdbg(w->dapm->dev, "Marking %s dirty due to %s\n",
139 list_add_tail(&w->dirty, &w->dapm->card->dapm_dirty);
142 EXPORT_SYMBOL_GPL(dapm_mark_dirty);
144 void dapm_mark_io_dirty(struct snd_soc_dapm_context *dapm)
146 struct snd_soc_card *card = dapm->card;
147 struct snd_soc_dapm_widget *w;
149 mutex_lock(&card->dapm_mutex);
151 list_for_each_entry(w, &card->widgets, list) {
153 case snd_soc_dapm_input:
154 case snd_soc_dapm_output:
155 dapm_mark_dirty(w, "Rechecking inputs and outputs");
162 mutex_unlock(&card->dapm_mutex);
164 EXPORT_SYMBOL_GPL(dapm_mark_io_dirty);
166 /* create a new dapm widget */
167 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
168 const struct snd_soc_dapm_widget *_widget)
170 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
173 /* get snd_card from DAPM context */
174 static inline struct snd_card *dapm_get_snd_card(
175 struct snd_soc_dapm_context *dapm)
178 return dapm->codec->card->snd_card;
179 else if (dapm->platform)
180 return dapm->platform->card->snd_card;
188 /* get soc_card from DAPM context */
189 static inline struct snd_soc_card *dapm_get_soc_card(
190 struct snd_soc_dapm_context *dapm)
193 return dapm->codec->card;
194 else if (dapm->platform)
195 return dapm->platform->card;
203 static void dapm_reset(struct snd_soc_card *card)
205 struct snd_soc_dapm_widget *w;
207 memset(&card->dapm_stats, 0, sizeof(card->dapm_stats));
209 list_for_each_entry(w, &card->widgets, list) {
210 w->power_checked = false;
216 static int soc_widget_read(struct snd_soc_dapm_widget *w, int reg)
219 return snd_soc_read(w->codec, reg);
220 else if (w->platform)
221 return snd_soc_platform_read(w->platform, reg);
223 dev_err(w->dapm->dev, "ASoC: no valid widget read method\n");
227 static int soc_widget_write(struct snd_soc_dapm_widget *w, int reg, int val)
230 return snd_soc_write(w->codec, reg, val);
231 else if (w->platform)
232 return snd_soc_platform_write(w->platform, reg, val);
234 dev_err(w->dapm->dev, "ASoC: no valid widget write method\n");
238 static inline void soc_widget_lock(struct snd_soc_dapm_widget *w)
240 if (w->codec && !w->codec->using_regmap)
241 mutex_lock(&w->codec->mutex);
242 else if (w->platform)
243 mutex_lock(&w->platform->mutex);
246 static inline void soc_widget_unlock(struct snd_soc_dapm_widget *w)
248 if (w->codec && !w->codec->using_regmap)
249 mutex_unlock(&w->codec->mutex);
250 else if (w->platform)
251 mutex_unlock(&w->platform->mutex);
254 static int soc_widget_update_bits_locked(struct snd_soc_dapm_widget *w,
255 unsigned short reg, unsigned int mask, unsigned int value)
258 unsigned int old, new;
261 if (w->codec && w->codec->using_regmap) {
262 ret = regmap_update_bits_check(w->codec->control_data,
263 reg, mask, value, &change);
268 ret = soc_widget_read(w, reg);
270 soc_widget_unlock(w);
275 new = (old & ~mask) | (value & mask);
278 ret = soc_widget_write(w, reg, new);
280 soc_widget_unlock(w);
284 soc_widget_unlock(w);
291 * snd_soc_dapm_set_bias_level - set the bias level for the system
292 * @dapm: DAPM context
293 * @level: level to configure
295 * Configure the bias (power) levels for the SoC audio device.
297 * Returns 0 for success else error.
299 static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm,
300 enum snd_soc_bias_level level)
302 struct snd_soc_card *card = dapm->card;
305 trace_snd_soc_bias_level_start(card, level);
307 if (card && card->set_bias_level)
308 ret = card->set_bias_level(card, dapm, level);
313 if (dapm->codec->driver->set_bias_level)
314 ret = dapm->codec->driver->set_bias_level(dapm->codec,
317 dapm->bias_level = level;
318 } else if (!card || dapm != &card->dapm) {
319 dapm->bias_level = level;
325 if (card && card->set_bias_level_post)
326 ret = card->set_bias_level_post(card, dapm, level);
328 trace_snd_soc_bias_level_done(card, level);
333 /* set up initial codec paths */
334 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
335 struct snd_soc_dapm_path *p, int i)
338 case snd_soc_dapm_switch:
339 case snd_soc_dapm_mixer:
340 case snd_soc_dapm_mixer_named_ctl: {
342 struct soc_mixer_control *mc = (struct soc_mixer_control *)
343 w->kcontrol_news[i].private_value;
344 unsigned int reg = mc->reg;
345 unsigned int shift = mc->shift;
347 unsigned int mask = (1 << fls(max)) - 1;
348 unsigned int invert = mc->invert;
350 val = soc_widget_read(w, reg);
351 val = (val >> shift) & mask;
358 case snd_soc_dapm_mux: {
359 struct soc_enum *e = (struct soc_enum *)
360 w->kcontrol_news[i].private_value;
363 val = soc_widget_read(w, e->reg);
364 item = (val >> e->shift_l) & e->mask;
366 if (item < e->max && !strcmp(p->name, e->texts[item]))
372 case snd_soc_dapm_virt_mux: {
373 struct soc_enum *e = (struct soc_enum *)
374 w->kcontrol_news[i].private_value;
377 /* since a virtual mux has no backing registers to
378 * decide which path to connect, it will try to match
379 * with the first enumeration. This is to ensure
380 * that the default mux choice (the first) will be
381 * correctly powered up during initialization.
383 if (!strcmp(p->name, e->texts[0]))
387 case snd_soc_dapm_value_mux: {
388 struct soc_enum *e = (struct soc_enum *)
389 w->kcontrol_news[i].private_value;
392 val = soc_widget_read(w, e->reg);
393 val = (val >> e->shift_l) & e->mask;
394 for (item = 0; item < e->max; item++) {
395 if (val == e->values[item])
399 if (item < e->max && !strcmp(p->name, e->texts[item]))
405 /* does not affect routing - always connected */
406 case snd_soc_dapm_pga:
407 case snd_soc_dapm_out_drv:
408 case snd_soc_dapm_output:
409 case snd_soc_dapm_adc:
410 case snd_soc_dapm_input:
411 case snd_soc_dapm_siggen:
412 case snd_soc_dapm_dac:
413 case snd_soc_dapm_micbias:
414 case snd_soc_dapm_vmid:
415 case snd_soc_dapm_supply:
416 case snd_soc_dapm_regulator_supply:
417 case snd_soc_dapm_clock_supply:
418 case snd_soc_dapm_aif_in:
419 case snd_soc_dapm_aif_out:
420 case snd_soc_dapm_dai:
421 case snd_soc_dapm_hp:
422 case snd_soc_dapm_mic:
423 case snd_soc_dapm_spk:
424 case snd_soc_dapm_line:
425 case snd_soc_dapm_dai_link:
428 /* does affect routing - dynamically connected */
429 case snd_soc_dapm_pre:
430 case snd_soc_dapm_post:
436 /* connect mux widget to its interconnecting audio paths */
437 static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
438 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
439 struct snd_soc_dapm_path *path, const char *control_name,
440 const struct snd_kcontrol_new *kcontrol)
442 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
445 for (i = 0; i < e->max; i++) {
446 if (!(strcmp(control_name, e->texts[i]))) {
447 list_add(&path->list, &dapm->card->paths);
448 list_add(&path->list_sink, &dest->sources);
449 list_add(&path->list_source, &src->sinks);
450 path->name = (char*)e->texts[i];
451 dapm_set_path_status(dest, path, 0);
459 /* connect mixer widget to its interconnecting audio paths */
460 static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
461 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
462 struct snd_soc_dapm_path *path, const char *control_name)
466 /* search for mixer kcontrol */
467 for (i = 0; i < dest->num_kcontrols; i++) {
468 if (!strcmp(control_name, dest->kcontrol_news[i].name)) {
469 list_add(&path->list, &dapm->card->paths);
470 list_add(&path->list_sink, &dest->sources);
471 list_add(&path->list_source, &src->sinks);
472 path->name = dest->kcontrol_news[i].name;
473 dapm_set_path_status(dest, path, i);
480 static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm,
481 struct snd_soc_dapm_widget *kcontrolw,
482 const struct snd_kcontrol_new *kcontrol_new,
483 struct snd_kcontrol **kcontrol)
485 struct snd_soc_dapm_widget *w;
490 list_for_each_entry(w, &dapm->card->widgets, list) {
491 if (w == kcontrolw || w->dapm != kcontrolw->dapm)
493 for (i = 0; i < w->num_kcontrols; i++) {
494 if (&w->kcontrol_news[i] == kcontrol_new) {
496 *kcontrol = w->kcontrols[i];
505 static void dapm_kcontrol_free(struct snd_kcontrol *kctl)
507 kfree(kctl->private_data);
511 * Determine if a kcontrol is shared. If it is, look it up. If it isn't,
512 * create it. Either way, add the widget into the control's widget list
514 static int dapm_create_or_share_mixmux_kcontrol(struct snd_soc_dapm_widget *w,
515 int kci, struct snd_soc_dapm_path *path)
517 struct snd_soc_dapm_context *dapm = w->dapm;
518 struct snd_card *card = dapm->card->snd_card;
522 struct snd_kcontrol *kcontrol;
523 struct snd_soc_dapm_widget_list *wlist;
526 bool wname_in_long_name, kcname_in_long_name;
533 prefix = dapm->codec->name_prefix;
538 prefix_len = strlen(prefix) + 1;
542 shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[kci],
546 wlist = kcontrol->private_data;
547 wlistentries = wlist->num_widgets + 1;
553 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
554 wlistentries * sizeof(struct snd_soc_dapm_widget *);
555 wlist = krealloc(wlist, wlistsize, GFP_KERNEL);
557 dev_err(dapm->dev, "ASoC: can't allocate widget list for %s\n",
561 wlist->num_widgets = wlistentries;
562 wlist->widgets[wlistentries - 1] = w;
566 wname_in_long_name = false;
567 kcname_in_long_name = true;
570 case snd_soc_dapm_switch:
571 case snd_soc_dapm_mixer:
572 wname_in_long_name = true;
573 kcname_in_long_name = true;
575 case snd_soc_dapm_mixer_named_ctl:
576 wname_in_long_name = false;
577 kcname_in_long_name = true;
579 case snd_soc_dapm_mux:
580 case snd_soc_dapm_virt_mux:
581 case snd_soc_dapm_value_mux:
582 wname_in_long_name = true;
583 kcname_in_long_name = false;
591 if (wname_in_long_name && kcname_in_long_name) {
592 name_len = strlen(w->name) - prefix_len + 1 +
593 strlen(w->kcontrol_news[kci].name) + 1;
595 long_name = kmalloc(name_len, GFP_KERNEL);
596 if (long_name == NULL) {
602 * The control will get a prefix from the control
603 * creation process but we're also using the same
604 * prefix for widgets so cut the prefix off the
605 * front of the widget name.
607 snprintf(long_name, name_len, "%s %s",
608 w->name + prefix_len,
609 w->kcontrol_news[kci].name);
610 long_name[name_len - 1] = '\0';
613 } else if (wname_in_long_name) {
615 name = w->name + prefix_len;
618 name = w->kcontrol_news[kci].name;
621 kcontrol = snd_soc_cnew(&w->kcontrol_news[kci], wlist, name,
623 kcontrol->private_free = dapm_kcontrol_free;
624 ret = snd_ctl_add(card, kcontrol);
627 "ASoC: failed to add widget %s dapm kcontrol %s: %d\n",
634 path->long_name = long_name;
637 kcontrol->private_data = wlist;
638 w->kcontrols[kci] = kcontrol;
639 path->kcontrol = kcontrol;
644 /* create new dapm mixer control */
645 static int dapm_new_mixer(struct snd_soc_dapm_widget *w)
648 struct snd_soc_dapm_path *path;
651 for (i = 0; i < w->num_kcontrols; i++) {
653 list_for_each_entry(path, &w->sources, list_sink) {
654 /* mixer/mux paths name must match control name */
655 if (path->name != (char *)w->kcontrol_news[i].name)
658 if (w->kcontrols[i]) {
659 path->kcontrol = w->kcontrols[i];
663 ret = dapm_create_or_share_mixmux_kcontrol(w, i, path);
672 /* create new dapm mux control */
673 static int dapm_new_mux(struct snd_soc_dapm_widget *w)
675 struct snd_soc_dapm_context *dapm = w->dapm;
676 struct snd_soc_dapm_path *path;
679 if (w->num_kcontrols != 1) {
681 "ASoC: mux %s has incorrect number of controls\n",
686 path = list_first_entry(&w->sources, struct snd_soc_dapm_path,
689 dev_err(dapm->dev, "ASoC: mux %s has no paths\n", w->name);
693 ret = dapm_create_or_share_mixmux_kcontrol(w, 0, path);
697 list_for_each_entry(path, &w->sources, list_sink)
698 path->kcontrol = w->kcontrols[0];
703 /* create new dapm volume control */
704 static int dapm_new_pga(struct snd_soc_dapm_widget *w)
706 if (w->num_kcontrols)
707 dev_err(w->dapm->dev,
708 "ASoC: PGA controls not supported: '%s'\n", w->name);
713 /* reset 'walked' bit for each dapm path */
714 static void dapm_clear_walk_output(struct snd_soc_dapm_context *dapm,
715 struct list_head *sink)
717 struct snd_soc_dapm_path *p;
719 list_for_each_entry(p, sink, list_source) {
722 dapm_clear_walk_output(dapm, &p->sink->sinks);
727 static void dapm_clear_walk_input(struct snd_soc_dapm_context *dapm,
728 struct list_head *source)
730 struct snd_soc_dapm_path *p;
732 list_for_each_entry(p, source, list_sink) {
735 dapm_clear_walk_input(dapm, &p->source->sources);
741 /* We implement power down on suspend by checking the power state of
742 * the ALSA card - when we are suspending the ALSA state for the card
745 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
747 int level = snd_power_get_state(widget->dapm->card->snd_card);
750 case SNDRV_CTL_POWER_D3hot:
751 case SNDRV_CTL_POWER_D3cold:
752 if (widget->ignore_suspend)
753 dev_dbg(widget->dapm->dev, "ASoC: %s ignoring suspend\n",
755 return widget->ignore_suspend;
761 /* add widget to list if it's not already in the list */
762 static int dapm_list_add_widget(struct snd_soc_dapm_widget_list **list,
763 struct snd_soc_dapm_widget *w)
765 struct snd_soc_dapm_widget_list *wlist;
766 int wlistsize, wlistentries, i;
773 /* is this widget already in the list */
774 for (i = 0; i < wlist->num_widgets; i++) {
775 if (wlist->widgets[i] == w)
779 /* allocate some new space */
780 wlistentries = wlist->num_widgets + 1;
781 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
782 wlistentries * sizeof(struct snd_soc_dapm_widget *);
783 *list = krealloc(wlist, wlistsize, GFP_KERNEL);
785 dev_err(w->dapm->dev, "ASoC: can't allocate widget list for %s\n",
791 /* insert the widget */
792 dev_dbg(w->dapm->dev, "ASoC: added %s in widget list pos %d\n",
793 w->name, wlist->num_widgets);
795 wlist->widgets[wlist->num_widgets] = w;
796 wlist->num_widgets++;
801 * Recursively check for a completed path to an active or physically connected
802 * output widget. Returns number of complete paths.
804 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget,
805 struct snd_soc_dapm_widget_list **list)
807 struct snd_soc_dapm_path *path;
810 if (widget->outputs >= 0)
811 return widget->outputs;
813 DAPM_UPDATE_STAT(widget, path_checks);
815 switch (widget->id) {
816 case snd_soc_dapm_supply:
817 case snd_soc_dapm_regulator_supply:
818 case snd_soc_dapm_clock_supply:
824 switch (widget->id) {
825 case snd_soc_dapm_adc:
826 case snd_soc_dapm_aif_out:
827 case snd_soc_dapm_dai:
828 if (widget->active) {
829 widget->outputs = snd_soc_dapm_suspend_check(widget);
830 return widget->outputs;
836 if (widget->connected) {
837 /* connected pin ? */
838 if (widget->id == snd_soc_dapm_output && !widget->ext) {
839 widget->outputs = snd_soc_dapm_suspend_check(widget);
840 return widget->outputs;
843 /* connected jack or spk ? */
844 if (widget->id == snd_soc_dapm_hp ||
845 widget->id == snd_soc_dapm_spk ||
846 (widget->id == snd_soc_dapm_line &&
847 !list_empty(&widget->sources))) {
848 widget->outputs = snd_soc_dapm_suspend_check(widget);
849 return widget->outputs;
853 list_for_each_entry(path, &widget->sinks, list_source) {
854 DAPM_UPDATE_STAT(widget, neighbour_checks);
865 trace_snd_soc_dapm_output_path(widget, path);
867 if (path->sink && path->connect) {
871 /* do we need to add this widget to the list ? */
874 err = dapm_list_add_widget(list, path->sink);
876 dev_err(widget->dapm->dev,
877 "ASoC: could not add widget %s\n",
884 con += is_connected_output_ep(path->sink, list);
890 widget->outputs = con;
896 * Recursively check for a completed path to an active or physically connected
897 * input widget. Returns number of complete paths.
899 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget,
900 struct snd_soc_dapm_widget_list **list)
902 struct snd_soc_dapm_path *path;
905 if (widget->inputs >= 0)
906 return widget->inputs;
908 DAPM_UPDATE_STAT(widget, path_checks);
910 switch (widget->id) {
911 case snd_soc_dapm_supply:
912 case snd_soc_dapm_regulator_supply:
913 case snd_soc_dapm_clock_supply:
919 /* active stream ? */
920 switch (widget->id) {
921 case snd_soc_dapm_dac:
922 case snd_soc_dapm_aif_in:
923 case snd_soc_dapm_dai:
924 if (widget->active) {
925 widget->inputs = snd_soc_dapm_suspend_check(widget);
926 return widget->inputs;
932 if (widget->connected) {
933 /* connected pin ? */
934 if (widget->id == snd_soc_dapm_input && !widget->ext) {
935 widget->inputs = snd_soc_dapm_suspend_check(widget);
936 return widget->inputs;
939 /* connected VMID/Bias for lower pops */
940 if (widget->id == snd_soc_dapm_vmid) {
941 widget->inputs = snd_soc_dapm_suspend_check(widget);
942 return widget->inputs;
945 /* connected jack ? */
946 if (widget->id == snd_soc_dapm_mic ||
947 (widget->id == snd_soc_dapm_line &&
948 !list_empty(&widget->sinks))) {
949 widget->inputs = snd_soc_dapm_suspend_check(widget);
950 return widget->inputs;
953 /* signal generator */
954 if (widget->id == snd_soc_dapm_siggen) {
955 widget->inputs = snd_soc_dapm_suspend_check(widget);
956 return widget->inputs;
960 list_for_each_entry(path, &widget->sources, list_sink) {
961 DAPM_UPDATE_STAT(widget, neighbour_checks);
972 trace_snd_soc_dapm_input_path(widget, path);
974 if (path->source && path->connect) {
978 /* do we need to add this widget to the list ? */
981 err = dapm_list_add_widget(list, path->source);
983 dev_err(widget->dapm->dev,
984 "ASoC: could not add widget %s\n",
991 con += is_connected_input_ep(path->source, list);
997 widget->inputs = con;
1003 * snd_soc_dapm_get_connected_widgets - query audio path and it's widgets.
1004 * @dai: the soc DAI.
1005 * @stream: stream direction.
1006 * @list: list of active widgets for this stream.
1008 * Queries DAPM graph as to whether an valid audio stream path exists for
1009 * the initial stream specified by name. This takes into account
1010 * current mixer and mux kcontrol settings. Creates list of valid widgets.
1012 * Returns the number of valid paths or negative error.
1014 int snd_soc_dapm_dai_get_connected_widgets(struct snd_soc_dai *dai, int stream,
1015 struct snd_soc_dapm_widget_list **list)
1017 struct snd_soc_card *card = dai->card;
1020 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
1023 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1024 paths = is_connected_output_ep(dai->playback_widget, list);
1025 dapm_clear_walk_output(&card->dapm,
1026 &dai->playback_widget->sinks);
1028 paths = is_connected_input_ep(dai->capture_widget, list);
1029 dapm_clear_walk_input(&card->dapm,
1030 &dai->capture_widget->sources);
1033 trace_snd_soc_dapm_connected(paths, stream);
1034 mutex_unlock(&card->dapm_mutex);
1040 * Handler for generic register modifier widget.
1042 int dapm_reg_event(struct snd_soc_dapm_widget *w,
1043 struct snd_kcontrol *kcontrol, int event)
1047 if (SND_SOC_DAPM_EVENT_ON(event))
1052 soc_widget_update_bits_locked(w, -(w->reg + 1),
1053 w->mask << w->shift, val << w->shift);
1057 EXPORT_SYMBOL_GPL(dapm_reg_event);
1060 * Handler for regulator supply widget.
1062 int dapm_regulator_event(struct snd_soc_dapm_widget *w,
1063 struct snd_kcontrol *kcontrol, int event)
1067 if (SND_SOC_DAPM_EVENT_ON(event)) {
1068 if (w->invert & SND_SOC_DAPM_REGULATOR_BYPASS) {
1069 ret = regulator_allow_bypass(w->regulator, false);
1071 dev_warn(w->dapm->dev,
1072 "ASoC: Failed to bypass %s: %d\n",
1076 return regulator_enable(w->regulator);
1078 if (w->invert & SND_SOC_DAPM_REGULATOR_BYPASS) {
1079 ret = regulator_allow_bypass(w->regulator, true);
1081 dev_warn(w->dapm->dev,
1082 "ASoC: Failed to unbypass %s: %d\n",
1086 return regulator_disable_deferred(w->regulator, w->shift);
1089 EXPORT_SYMBOL_GPL(dapm_regulator_event);
1092 * Handler for clock supply widget.
1094 int dapm_clock_event(struct snd_soc_dapm_widget *w,
1095 struct snd_kcontrol *kcontrol, int event)
1100 #ifdef CONFIG_HAVE_CLK
1101 if (SND_SOC_DAPM_EVENT_ON(event)) {
1102 return clk_prepare_enable(w->clk);
1104 clk_disable_unprepare(w->clk);
1110 EXPORT_SYMBOL_GPL(dapm_clock_event);
1112 static int dapm_widget_power_check(struct snd_soc_dapm_widget *w)
1114 if (w->power_checked)
1115 return w->new_power;
1120 w->new_power = w->power_check(w);
1122 w->power_checked = true;
1124 return w->new_power;
1127 /* Generic check to see if a widget should be powered.
1129 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
1133 DAPM_UPDATE_STAT(w, power_checks);
1135 in = is_connected_input_ep(w, NULL);
1136 dapm_clear_walk_input(w->dapm, &w->sources);
1137 out = is_connected_output_ep(w, NULL);
1138 dapm_clear_walk_output(w->dapm, &w->sinks);
1139 return out != 0 && in != 0;
1142 static int dapm_dai_check_power(struct snd_soc_dapm_widget *w)
1144 DAPM_UPDATE_STAT(w, power_checks);
1149 return dapm_generic_check_power(w);
1152 /* Check to see if an ADC has power */
1153 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
1157 DAPM_UPDATE_STAT(w, power_checks);
1160 in = is_connected_input_ep(w, NULL);
1161 dapm_clear_walk_input(w->dapm, &w->sources);
1164 return dapm_generic_check_power(w);
1168 /* Check to see if a DAC has power */
1169 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
1173 DAPM_UPDATE_STAT(w, power_checks);
1176 out = is_connected_output_ep(w, NULL);
1177 dapm_clear_walk_output(w->dapm, &w->sinks);
1180 return dapm_generic_check_power(w);
1184 /* Check to see if a power supply is needed */
1185 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
1187 struct snd_soc_dapm_path *path;
1189 DAPM_UPDATE_STAT(w, power_checks);
1191 /* Check if one of our outputs is connected */
1192 list_for_each_entry(path, &w->sinks, list_source) {
1193 DAPM_UPDATE_STAT(w, neighbour_checks);
1198 if (path->connected &&
1199 !path->connected(path->source, path->sink))
1205 if (dapm_widget_power_check(path->sink))
1212 static int dapm_always_on_check_power(struct snd_soc_dapm_widget *w)
1217 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
1218 struct snd_soc_dapm_widget *b,
1226 sort = dapm_down_seq;
1228 if (sort[a->id] != sort[b->id])
1229 return sort[a->id] - sort[b->id];
1230 if (a->subseq != b->subseq) {
1232 return a->subseq - b->subseq;
1234 return b->subseq - a->subseq;
1236 if (a->reg != b->reg)
1237 return a->reg - b->reg;
1238 if (a->dapm != b->dapm)
1239 return (unsigned long)a->dapm - (unsigned long)b->dapm;
1244 /* Insert a widget in order into a DAPM power sequence. */
1245 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
1246 struct list_head *list,
1249 struct snd_soc_dapm_widget *w;
1251 list_for_each_entry(w, list, power_list)
1252 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
1253 list_add_tail(&new_widget->power_list, &w->power_list);
1257 list_add_tail(&new_widget->power_list, list);
1260 static void dapm_seq_check_event(struct snd_soc_dapm_context *dapm,
1261 struct snd_soc_dapm_widget *w, int event)
1263 struct snd_soc_card *card = dapm->card;
1264 const char *ev_name;
1268 case SND_SOC_DAPM_PRE_PMU:
1269 ev_name = "PRE_PMU";
1272 case SND_SOC_DAPM_POST_PMU:
1273 ev_name = "POST_PMU";
1276 case SND_SOC_DAPM_PRE_PMD:
1277 ev_name = "PRE_PMD";
1280 case SND_SOC_DAPM_POST_PMD:
1281 ev_name = "POST_PMD";
1289 if (w->power != power)
1292 if (w->event && (w->event_flags & event)) {
1293 pop_dbg(dapm->dev, card->pop_time, "pop test : %s %s\n",
1295 trace_snd_soc_dapm_widget_event_start(w, event);
1296 ret = w->event(w, NULL, event);
1297 trace_snd_soc_dapm_widget_event_done(w, event);
1299 dev_err(dapm->dev, "ASoC: %s: %s event failed: %d\n",
1300 ev_name, w->name, ret);
1304 /* Apply the coalesced changes from a DAPM sequence */
1305 static void dapm_seq_run_coalesced(struct snd_soc_dapm_context *dapm,
1306 struct list_head *pending)
1308 struct snd_soc_card *card = dapm->card;
1309 struct snd_soc_dapm_widget *w;
1311 unsigned int value = 0;
1312 unsigned int mask = 0;
1313 unsigned int cur_mask;
1315 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
1318 list_for_each_entry(w, pending, power_list) {
1319 cur_mask = 1 << w->shift;
1320 BUG_ON(reg != w->reg);
1331 pop_dbg(dapm->dev, card->pop_time,
1332 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
1333 w->name, reg, value, mask);
1335 /* Check for events */
1336 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMU);
1337 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMD);
1341 /* Any widget will do, they should all be updating the
1344 w = list_first_entry(pending, struct snd_soc_dapm_widget,
1347 pop_dbg(dapm->dev, card->pop_time,
1348 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
1349 value, mask, reg, card->pop_time);
1350 pop_wait(card->pop_time);
1351 soc_widget_update_bits_locked(w, reg, mask, value);
1354 list_for_each_entry(w, pending, power_list) {
1355 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMU);
1356 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMD);
1360 /* Apply a DAPM power sequence.
1362 * We walk over a pre-sorted list of widgets to apply power to. In
1363 * order to minimise the number of writes to the device required
1364 * multiple widgets will be updated in a single write where possible.
1365 * Currently anything that requires more than a single write is not
1368 static void dapm_seq_run(struct snd_soc_dapm_context *dapm,
1369 struct list_head *list, int event, bool power_up)
1371 struct snd_soc_dapm_widget *w, *n;
1374 int cur_subseq = -1;
1375 int cur_reg = SND_SOC_NOPM;
1376 struct snd_soc_dapm_context *cur_dapm = NULL;
1383 sort = dapm_down_seq;
1385 list_for_each_entry_safe(w, n, list, power_list) {
1388 /* Do we need to apply any queued changes? */
1389 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
1390 w->dapm != cur_dapm || w->subseq != cur_subseq) {
1391 if (!list_empty(&pending))
1392 dapm_seq_run_coalesced(cur_dapm, &pending);
1394 if (cur_dapm && cur_dapm->seq_notifier) {
1395 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1396 if (sort[i] == cur_sort)
1397 cur_dapm->seq_notifier(cur_dapm,
1402 INIT_LIST_HEAD(&pending);
1404 cur_subseq = INT_MIN;
1405 cur_reg = SND_SOC_NOPM;
1410 case snd_soc_dapm_pre:
1412 list_for_each_entry_safe_continue(w, n, list,
1415 if (event == SND_SOC_DAPM_STREAM_START)
1417 NULL, SND_SOC_DAPM_PRE_PMU);
1418 else if (event == SND_SOC_DAPM_STREAM_STOP)
1420 NULL, SND_SOC_DAPM_PRE_PMD);
1423 case snd_soc_dapm_post:
1425 list_for_each_entry_safe_continue(w, n, list,
1428 if (event == SND_SOC_DAPM_STREAM_START)
1430 NULL, SND_SOC_DAPM_POST_PMU);
1431 else if (event == SND_SOC_DAPM_STREAM_STOP)
1433 NULL, SND_SOC_DAPM_POST_PMD);
1437 /* Queue it up for application */
1438 cur_sort = sort[w->id];
1439 cur_subseq = w->subseq;
1442 list_move(&w->power_list, &pending);
1447 dev_err(w->dapm->dev,
1448 "ASoC: Failed to apply widget power: %d\n", ret);
1451 if (!list_empty(&pending))
1452 dapm_seq_run_coalesced(cur_dapm, &pending);
1454 if (cur_dapm && cur_dapm->seq_notifier) {
1455 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1456 if (sort[i] == cur_sort)
1457 cur_dapm->seq_notifier(cur_dapm,
1462 static void dapm_widget_update(struct snd_soc_dapm_context *dapm)
1464 struct snd_soc_dapm_update *update = dapm->update;
1465 struct snd_soc_dapm_widget *w;
1474 (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
1475 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
1477 dev_err(dapm->dev, "ASoC: %s DAPM pre-event failed: %d\n",
1481 ret = soc_widget_update_bits_locked(w, update->reg, update->mask,
1484 dev_err(dapm->dev, "ASoC: %s DAPM update failed: %d\n",
1488 (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1489 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1491 dev_err(dapm->dev, "ASoC: %s DAPM post-event failed: %d\n",
1496 /* Async callback run prior to DAPM sequences - brings to _PREPARE if
1497 * they're changing state.
1499 static void dapm_pre_sequence_async(void *data, async_cookie_t cookie)
1501 struct snd_soc_dapm_context *d = data;
1504 /* If we're off and we're not supposed to be go into STANDBY */
1505 if (d->bias_level == SND_SOC_BIAS_OFF &&
1506 d->target_bias_level != SND_SOC_BIAS_OFF) {
1508 pm_runtime_get_sync(d->dev);
1510 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1513 "ASoC: Failed to turn on bias: %d\n", ret);
1516 /* Prepare for a STADDBY->ON or ON->STANDBY transition */
1517 if (d->bias_level != d->target_bias_level) {
1518 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);
1521 "ASoC: Failed to prepare bias: %d\n", ret);
1525 /* Async callback run prior to DAPM sequences - brings to their final
1528 static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
1530 struct snd_soc_dapm_context *d = data;
1533 /* If we just powered the last thing off drop to standby bias */
1534 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1535 (d->target_bias_level == SND_SOC_BIAS_STANDBY ||
1536 d->target_bias_level == SND_SOC_BIAS_OFF)) {
1537 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1539 dev_err(d->dev, "ASoC: Failed to apply standby bias: %d\n",
1543 /* If we're in standby and can support bias off then do that */
1544 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1545 d->target_bias_level == SND_SOC_BIAS_OFF) {
1546 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);
1548 dev_err(d->dev, "ASoC: Failed to turn off bias: %d\n",
1552 pm_runtime_put(d->dev);
1555 /* If we just powered up then move to active bias */
1556 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1557 d->target_bias_level == SND_SOC_BIAS_ON) {
1558 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);
1560 dev_err(d->dev, "ASoC: Failed to apply active bias: %d\n",
1565 static void dapm_widget_set_peer_power(struct snd_soc_dapm_widget *peer,
1566 bool power, bool connect)
1568 /* If a connection is being made or broken then that update
1569 * will have marked the peer dirty, otherwise the widgets are
1570 * not connected and this update has no impact. */
1574 /* If the peer is already in the state we're moving to then we
1575 * won't have an impact on it. */
1576 if (power != peer->power)
1577 dapm_mark_dirty(peer, "peer state change");
1580 static void dapm_widget_set_power(struct snd_soc_dapm_widget *w, bool power,
1581 struct list_head *up_list,
1582 struct list_head *down_list)
1584 struct snd_soc_dapm_path *path;
1586 if (w->power == power)
1589 trace_snd_soc_dapm_widget_power(w, power);
1591 /* If we changed our power state perhaps our neigbours changed
1594 list_for_each_entry(path, &w->sources, list_sink) {
1596 dapm_widget_set_peer_power(path->source, power,
1601 case snd_soc_dapm_supply:
1602 case snd_soc_dapm_regulator_supply:
1603 case snd_soc_dapm_clock_supply:
1604 /* Supplies can't affect their outputs, only their inputs */
1607 list_for_each_entry(path, &w->sinks, list_source) {
1609 dapm_widget_set_peer_power(path->sink, power,
1617 dapm_seq_insert(w, up_list, true);
1619 dapm_seq_insert(w, down_list, false);
1624 static void dapm_power_one_widget(struct snd_soc_dapm_widget *w,
1625 struct list_head *up_list,
1626 struct list_head *down_list)
1631 case snd_soc_dapm_pre:
1632 dapm_seq_insert(w, down_list, false);
1634 case snd_soc_dapm_post:
1635 dapm_seq_insert(w, up_list, true);
1639 power = dapm_widget_power_check(w);
1641 dapm_widget_set_power(w, power, up_list, down_list);
1647 * Scan each dapm widget for complete audio path.
1648 * A complete path is a route that has valid endpoints i.e.:-
1650 * o DAC to output pin.
1651 * o Input Pin to ADC.
1652 * o Input pin to Output pin (bypass, sidetone)
1653 * o DAC to ADC (loopback).
1655 static int dapm_power_widgets(struct snd_soc_dapm_context *dapm, int event)
1657 struct snd_soc_card *card = dapm->card;
1658 struct snd_soc_dapm_widget *w;
1659 struct snd_soc_dapm_context *d;
1661 LIST_HEAD(down_list);
1662 ASYNC_DOMAIN_EXCLUSIVE(async_domain);
1663 enum snd_soc_bias_level bias;
1665 trace_snd_soc_dapm_start(card);
1667 list_for_each_entry(d, &card->dapm_list, list) {
1668 if (d->idle_bias_off)
1669 d->target_bias_level = SND_SOC_BIAS_OFF;
1671 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1676 /* Check which widgets we need to power and store them in
1677 * lists indicating if they should be powered up or down. We
1678 * only check widgets that have been flagged as dirty but note
1679 * that new widgets may be added to the dirty list while we
1682 list_for_each_entry(w, &card->dapm_dirty, dirty) {
1683 dapm_power_one_widget(w, &up_list, &down_list);
1686 list_for_each_entry(w, &card->widgets, list) {
1688 case snd_soc_dapm_pre:
1689 case snd_soc_dapm_post:
1690 /* These widgets always need to be powered */
1693 list_del_init(&w->dirty);
1700 /* Supplies and micbiases only bring the
1701 * context up to STANDBY as unless something
1702 * else is active and passing audio they
1703 * generally don't require full power. Signal
1704 * generators are virtual pins and have no
1705 * power impact themselves.
1708 case snd_soc_dapm_siggen:
1710 case snd_soc_dapm_supply:
1711 case snd_soc_dapm_regulator_supply:
1712 case snd_soc_dapm_clock_supply:
1713 case snd_soc_dapm_micbias:
1714 if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
1715 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1718 d->target_bias_level = SND_SOC_BIAS_ON;
1725 /* Force all contexts in the card to the same bias state if
1726 * they're not ground referenced.
1728 bias = SND_SOC_BIAS_OFF;
1729 list_for_each_entry(d, &card->dapm_list, list)
1730 if (d->target_bias_level > bias)
1731 bias = d->target_bias_level;
1732 list_for_each_entry(d, &card->dapm_list, list)
1733 if (!d->idle_bias_off)
1734 d->target_bias_level = bias;
1736 trace_snd_soc_dapm_walk_done(card);
1738 /* Run all the bias changes in parallel */
1739 list_for_each_entry(d, &dapm->card->dapm_list, list)
1740 async_schedule_domain(dapm_pre_sequence_async, d,
1742 async_synchronize_full_domain(&async_domain);
1744 /* Power down widgets first; try to avoid amplifying pops. */
1745 dapm_seq_run(dapm, &down_list, event, false);
1747 dapm_widget_update(dapm);
1750 dapm_seq_run(dapm, &up_list, event, true);
1752 /* Run all the bias changes in parallel */
1753 list_for_each_entry(d, &dapm->card->dapm_list, list)
1754 async_schedule_domain(dapm_post_sequence_async, d,
1756 async_synchronize_full_domain(&async_domain);
1758 /* do we need to notify any clients that DAPM event is complete */
1759 list_for_each_entry(d, &card->dapm_list, list) {
1760 if (d->stream_event)
1761 d->stream_event(d, event);
1764 pop_dbg(dapm->dev, card->pop_time,
1765 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
1766 pop_wait(card->pop_time);
1768 trace_snd_soc_dapm_done(card);
1773 #ifdef CONFIG_DEBUG_FS
1774 static ssize_t dapm_widget_power_read_file(struct file *file,
1775 char __user *user_buf,
1776 size_t count, loff_t *ppos)
1778 struct snd_soc_dapm_widget *w = file->private_data;
1782 struct snd_soc_dapm_path *p = NULL;
1784 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1788 in = is_connected_input_ep(w, NULL);
1789 dapm_clear_walk_input(w->dapm, &w->sources);
1790 out = is_connected_output_ep(w, NULL);
1791 dapm_clear_walk_output(w->dapm, &w->sinks);
1793 ret = snprintf(buf, PAGE_SIZE, "%s: %s%s in %d out %d",
1794 w->name, w->power ? "On" : "Off",
1795 w->force ? " (forced)" : "", in, out);
1798 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1799 " - R%d(0x%x) bit %d",
1800 w->reg, w->reg, w->shift);
1802 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1805 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1807 w->active ? "active" : "inactive");
1809 list_for_each_entry(p, &w->sources, list_sink) {
1810 if (p->connected && !p->connected(w, p->sink))
1814 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1815 " in \"%s\" \"%s\"\n",
1816 p->name ? p->name : "static",
1819 list_for_each_entry(p, &w->sinks, list_source) {
1820 if (p->connected && !p->connected(w, p->sink))
1824 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1825 " out \"%s\" \"%s\"\n",
1826 p->name ? p->name : "static",
1830 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1836 static const struct file_operations dapm_widget_power_fops = {
1837 .open = simple_open,
1838 .read = dapm_widget_power_read_file,
1839 .llseek = default_llseek,
1842 static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
1843 size_t count, loff_t *ppos)
1845 struct snd_soc_dapm_context *dapm = file->private_data;
1848 switch (dapm->bias_level) {
1849 case SND_SOC_BIAS_ON:
1852 case SND_SOC_BIAS_PREPARE:
1853 level = "Prepare\n";
1855 case SND_SOC_BIAS_STANDBY:
1856 level = "Standby\n";
1858 case SND_SOC_BIAS_OFF:
1863 level = "Unknown\n";
1867 return simple_read_from_buffer(user_buf, count, ppos, level,
1871 static const struct file_operations dapm_bias_fops = {
1872 .open = simple_open,
1873 .read = dapm_bias_read_file,
1874 .llseek = default_llseek,
1877 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1878 struct dentry *parent)
1882 dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
1884 if (!dapm->debugfs_dapm) {
1886 "ASoC: Failed to create DAPM debugfs directory\n");
1890 d = debugfs_create_file("bias_level", 0444,
1891 dapm->debugfs_dapm, dapm,
1895 "ASoC: Failed to create bias level debugfs file\n");
1898 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1900 struct snd_soc_dapm_context *dapm = w->dapm;
1903 if (!dapm->debugfs_dapm || !w->name)
1906 d = debugfs_create_file(w->name, 0444,
1907 dapm->debugfs_dapm, w,
1908 &dapm_widget_power_fops);
1910 dev_warn(w->dapm->dev,
1911 "ASoC: Failed to create %s debugfs file\n",
1915 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1917 debugfs_remove_recursive(dapm->debugfs_dapm);
1921 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1922 struct dentry *parent)
1926 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1930 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1936 /* test and update the power status of a mux widget */
1937 static int soc_dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1938 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e)
1940 struct snd_soc_dapm_path *path;
1943 if (widget->id != snd_soc_dapm_mux &&
1944 widget->id != snd_soc_dapm_virt_mux &&
1945 widget->id != snd_soc_dapm_value_mux)
1948 /* find dapm widget path assoc with kcontrol */
1949 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1950 if (path->kcontrol != kcontrol)
1953 if (!path->name || !e->texts[mux])
1957 /* we now need to match the string in the enum to the path */
1958 if (!(strcmp(path->name, e->texts[mux]))) {
1959 path->connect = 1; /* new connection */
1960 dapm_mark_dirty(path->source, "mux connection");
1963 dapm_mark_dirty(path->source,
1964 "mux disconnection");
1965 path->connect = 0; /* old connection must be powered down */
1970 dapm_mark_dirty(widget, "mux change");
1971 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1977 int snd_soc_dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1978 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e)
1980 struct snd_soc_card *card = widget->dapm->card;
1983 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
1984 ret = soc_dapm_mux_update_power(widget, kcontrol, mux, e);
1985 mutex_unlock(&card->dapm_mutex);
1987 soc_dpcm_runtime_update(widget);
1990 EXPORT_SYMBOL_GPL(snd_soc_dapm_mux_update_power);
1992 /* test and update the power status of a mixer or switch widget */
1993 static int soc_dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1994 struct snd_kcontrol *kcontrol, int connect)
1996 struct snd_soc_dapm_path *path;
1999 if (widget->id != snd_soc_dapm_mixer &&
2000 widget->id != snd_soc_dapm_mixer_named_ctl &&
2001 widget->id != snd_soc_dapm_switch)
2004 /* find dapm widget path assoc with kcontrol */
2005 list_for_each_entry(path, &widget->dapm->card->paths, list) {
2006 if (path->kcontrol != kcontrol)
2009 /* found, now check type */
2011 path->connect = connect;
2012 dapm_mark_dirty(path->source, "mixer connection");
2016 dapm_mark_dirty(widget, "mixer update");
2017 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
2023 int snd_soc_dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
2024 struct snd_kcontrol *kcontrol, int connect)
2026 struct snd_soc_card *card = widget->dapm->card;
2029 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2030 ret = soc_dapm_mixer_update_power(widget, kcontrol, connect);
2031 mutex_unlock(&card->dapm_mutex);
2033 soc_dpcm_runtime_update(widget);
2036 EXPORT_SYMBOL_GPL(snd_soc_dapm_mixer_update_power);
2038 /* show dapm widget status in sys fs */
2039 static ssize_t dapm_widget_show(struct device *dev,
2040 struct device_attribute *attr, char *buf)
2042 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
2043 struct snd_soc_codec *codec =rtd->codec;
2044 struct snd_soc_dapm_widget *w;
2046 char *state = "not set";
2048 list_for_each_entry(w, &codec->card->widgets, list) {
2049 if (w->dapm != &codec->dapm)
2052 /* only display widgets that burnm power */
2054 case snd_soc_dapm_hp:
2055 case snd_soc_dapm_mic:
2056 case snd_soc_dapm_spk:
2057 case snd_soc_dapm_line:
2058 case snd_soc_dapm_micbias:
2059 case snd_soc_dapm_dac:
2060 case snd_soc_dapm_adc:
2061 case snd_soc_dapm_pga:
2062 case snd_soc_dapm_out_drv:
2063 case snd_soc_dapm_mixer:
2064 case snd_soc_dapm_mixer_named_ctl:
2065 case snd_soc_dapm_supply:
2066 case snd_soc_dapm_regulator_supply:
2067 case snd_soc_dapm_clock_supply:
2069 count += sprintf(buf + count, "%s: %s\n",
2070 w->name, w->power ? "On":"Off");
2077 switch (codec->dapm.bias_level) {
2078 case SND_SOC_BIAS_ON:
2081 case SND_SOC_BIAS_PREPARE:
2084 case SND_SOC_BIAS_STANDBY:
2087 case SND_SOC_BIAS_OFF:
2091 count += sprintf(buf + count, "PM State: %s\n", state);
2096 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
2098 int snd_soc_dapm_sys_add(struct device *dev)
2100 return device_create_file(dev, &dev_attr_dapm_widget);
2103 static void snd_soc_dapm_sys_remove(struct device *dev)
2105 device_remove_file(dev, &dev_attr_dapm_widget);
2108 /* free all dapm widgets and resources */
2109 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
2111 struct snd_soc_dapm_widget *w, *next_w;
2112 struct snd_soc_dapm_path *p, *next_p;
2114 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
2115 if (w->dapm != dapm)
2119 * remove source and sink paths associated to this widget.
2120 * While removing the path, remove reference to it from both
2121 * source and sink widgets so that path is removed only once.
2123 list_for_each_entry_safe(p, next_p, &w->sources, list_sink) {
2124 list_del(&p->list_sink);
2125 list_del(&p->list_source);
2127 kfree(p->long_name);
2130 list_for_each_entry_safe(p, next_p, &w->sinks, list_source) {
2131 list_del(&p->list_sink);
2132 list_del(&p->list_source);
2134 kfree(p->long_name);
2137 kfree(w->kcontrols);
2143 static struct snd_soc_dapm_widget *dapm_find_widget(
2144 struct snd_soc_dapm_context *dapm, const char *pin,
2145 bool search_other_contexts)
2147 struct snd_soc_dapm_widget *w;
2148 struct snd_soc_dapm_widget *fallback = NULL;
2150 list_for_each_entry(w, &dapm->card->widgets, list) {
2151 if (!strcmp(w->name, pin)) {
2152 if (w->dapm == dapm)
2159 if (search_other_contexts)
2165 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
2166 const char *pin, int status)
2168 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2171 dev_err(dapm->dev, "ASoC: DAPM unknown pin %s\n", pin);
2175 if (w->connected != status)
2176 dapm_mark_dirty(w, "pin configuration");
2178 w->connected = status;
2186 * snd_soc_dapm_sync - scan and power dapm paths
2187 * @dapm: DAPM context
2189 * Walks all dapm audio paths and powers widgets according to their
2190 * stream or path usage.
2192 * Returns 0 for success.
2194 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
2199 * Suppress early reports (eg, jacks syncing their state) to avoid
2200 * silly DAPM runs during card startup.
2202 if (!dapm->card || !dapm->card->instantiated)
2205 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2206 ret = dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
2207 mutex_unlock(&dapm->card->dapm_mutex);
2210 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
2212 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
2213 const struct snd_soc_dapm_route *route)
2215 struct snd_soc_dapm_path *path;
2216 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
2217 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
2219 const char *control = route->control;
2221 char prefixed_sink[80];
2222 char prefixed_source[80];
2225 if (dapm->codec && dapm->codec->name_prefix) {
2226 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
2227 dapm->codec->name_prefix, route->sink);
2228 sink = prefixed_sink;
2229 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
2230 dapm->codec->name_prefix, route->source);
2231 source = prefixed_source;
2234 source = route->source;
2238 * find src and dest widgets over all widgets but favor a widget from
2239 * current DAPM context
2241 list_for_each_entry(w, &dapm->card->widgets, list) {
2242 if (!wsink && !(strcmp(w->name, sink))) {
2244 if (w->dapm == dapm)
2248 if (!wsource && !(strcmp(w->name, source))) {
2250 if (w->dapm == dapm)
2254 /* use widget from another DAPM context if not found from this */
2260 if (wsource == NULL) {
2261 dev_err(dapm->dev, "ASoC: no source widget found for %s\n",
2265 if (wsink == NULL) {
2266 dev_err(dapm->dev, "ASoC: no sink widget found for %s\n",
2271 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
2275 path->source = wsource;
2277 path->connected = route->connected;
2278 INIT_LIST_HEAD(&path->list);
2279 INIT_LIST_HEAD(&path->list_source);
2280 INIT_LIST_HEAD(&path->list_sink);
2282 /* check for external widgets */
2283 if (wsink->id == snd_soc_dapm_input) {
2284 if (wsource->id == snd_soc_dapm_micbias ||
2285 wsource->id == snd_soc_dapm_mic ||
2286 wsource->id == snd_soc_dapm_line ||
2287 wsource->id == snd_soc_dapm_output)
2290 if (wsource->id == snd_soc_dapm_output) {
2291 if (wsink->id == snd_soc_dapm_spk ||
2292 wsink->id == snd_soc_dapm_hp ||
2293 wsink->id == snd_soc_dapm_line ||
2294 wsink->id == snd_soc_dapm_input)
2298 /* connect static paths */
2299 if (control == NULL) {
2300 list_add(&path->list, &dapm->card->paths);
2301 list_add(&path->list_sink, &wsink->sources);
2302 list_add(&path->list_source, &wsource->sinks);
2307 /* connect dynamic paths */
2308 switch (wsink->id) {
2309 case snd_soc_dapm_adc:
2310 case snd_soc_dapm_dac:
2311 case snd_soc_dapm_pga:
2312 case snd_soc_dapm_out_drv:
2313 case snd_soc_dapm_input:
2314 case snd_soc_dapm_output:
2315 case snd_soc_dapm_siggen:
2316 case snd_soc_dapm_micbias:
2317 case snd_soc_dapm_vmid:
2318 case snd_soc_dapm_pre:
2319 case snd_soc_dapm_post:
2320 case snd_soc_dapm_supply:
2321 case snd_soc_dapm_regulator_supply:
2322 case snd_soc_dapm_clock_supply:
2323 case snd_soc_dapm_aif_in:
2324 case snd_soc_dapm_aif_out:
2325 case snd_soc_dapm_dai:
2326 case snd_soc_dapm_dai_link:
2327 list_add(&path->list, &dapm->card->paths);
2328 list_add(&path->list_sink, &wsink->sources);
2329 list_add(&path->list_source, &wsource->sinks);
2332 case snd_soc_dapm_mux:
2333 case snd_soc_dapm_virt_mux:
2334 case snd_soc_dapm_value_mux:
2335 ret = dapm_connect_mux(dapm, wsource, wsink, path, control,
2336 &wsink->kcontrol_news[0]);
2340 case snd_soc_dapm_switch:
2341 case snd_soc_dapm_mixer:
2342 case snd_soc_dapm_mixer_named_ctl:
2343 ret = dapm_connect_mixer(dapm, wsource, wsink, path, control);
2347 case snd_soc_dapm_hp:
2348 case snd_soc_dapm_mic:
2349 case snd_soc_dapm_line:
2350 case snd_soc_dapm_spk:
2351 list_add(&path->list, &dapm->card->paths);
2352 list_add(&path->list_sink, &wsink->sources);
2353 list_add(&path->list_source, &wsource->sinks);
2358 dapm_mark_dirty(wsource, "Route added");
2359 dapm_mark_dirty(wsink, "Route added");
2364 dev_warn(dapm->dev, "ASoC: no dapm match for %s --> %s --> %s\n",
2365 source, control, sink);
2370 static int snd_soc_dapm_del_route(struct snd_soc_dapm_context *dapm,
2371 const struct snd_soc_dapm_route *route)
2373 struct snd_soc_dapm_path *path, *p;
2376 char prefixed_sink[80];
2377 char prefixed_source[80];
2379 if (route->control) {
2381 "ASoC: Removal of routes with controls not supported\n");
2385 if (dapm->codec && dapm->codec->name_prefix) {
2386 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
2387 dapm->codec->name_prefix, route->sink);
2388 sink = prefixed_sink;
2389 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
2390 dapm->codec->name_prefix, route->source);
2391 source = prefixed_source;
2394 source = route->source;
2398 list_for_each_entry(p, &dapm->card->paths, list) {
2399 if (strcmp(p->source->name, source) != 0)
2401 if (strcmp(p->sink->name, sink) != 0)
2408 dapm_mark_dirty(path->source, "Route removed");
2409 dapm_mark_dirty(path->sink, "Route removed");
2411 list_del(&path->list);
2412 list_del(&path->list_sink);
2413 list_del(&path->list_source);
2416 dev_warn(dapm->dev, "ASoC: Route %s->%s does not exist\n",
2424 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
2425 * @dapm: DAPM context
2426 * @route: audio routes
2427 * @num: number of routes
2429 * Connects 2 dapm widgets together via a named audio path. The sink is
2430 * the widget receiving the audio signal, whilst the source is the sender
2431 * of the audio signal.
2433 * Returns 0 for success else error. On error all resources can be freed
2434 * with a call to snd_soc_card_free().
2436 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
2437 const struct snd_soc_dapm_route *route, int num)
2441 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2442 for (i = 0; i < num; i++) {
2443 r = snd_soc_dapm_add_route(dapm, route);
2445 dev_err(dapm->dev, "ASoC: Failed to add route %s -> %s -> %s\n",
2447 route->control ? route->control : "direct",
2453 mutex_unlock(&dapm->card->dapm_mutex);
2457 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
2460 * snd_soc_dapm_del_routes - Remove routes between DAPM widgets
2461 * @dapm: DAPM context
2462 * @route: audio routes
2463 * @num: number of routes
2465 * Removes routes from the DAPM context.
2467 int snd_soc_dapm_del_routes(struct snd_soc_dapm_context *dapm,
2468 const struct snd_soc_dapm_route *route, int num)
2472 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2473 for (i = 0; i < num; i++) {
2474 snd_soc_dapm_del_route(dapm, route);
2477 mutex_unlock(&dapm->card->dapm_mutex);
2481 EXPORT_SYMBOL_GPL(snd_soc_dapm_del_routes);
2483 static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm,
2484 const struct snd_soc_dapm_route *route)
2486 struct snd_soc_dapm_widget *source = dapm_find_widget(dapm,
2489 struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm,
2492 struct snd_soc_dapm_path *path;
2496 dev_err(dapm->dev, "ASoC: Unable to find source %s for weak route\n",
2502 dev_err(dapm->dev, "ASoC: Unable to find sink %s for weak route\n",
2507 if (route->control || route->connected)
2508 dev_warn(dapm->dev, "ASoC: Ignoring control for weak route %s->%s\n",
2509 route->source, route->sink);
2511 list_for_each_entry(path, &source->sinks, list_source) {
2512 if (path->sink == sink) {
2519 dev_err(dapm->dev, "ASoC: No path found for weak route %s->%s\n",
2520 route->source, route->sink);
2522 dev_warn(dapm->dev, "ASoC: %d paths found for weak route %s->%s\n",
2523 count, route->source, route->sink);
2529 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
2530 * @dapm: DAPM context
2531 * @route: audio routes
2532 * @num: number of routes
2534 * Mark existing routes matching those specified in the passed array
2535 * as being weak, meaning that they are ignored for the purpose of
2536 * power decisions. The main intended use case is for sidetone paths
2537 * which couple audio between other independent paths if they are both
2538 * active in order to make the combination work better at the user
2539 * level but which aren't intended to be "used".
2541 * Note that CODEC drivers should not use this as sidetone type paths
2542 * can frequently also be used as bypass paths.
2544 int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm,
2545 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 err = snd_soc_dapm_weak_route(dapm, route);
2557 mutex_unlock(&dapm->card->dapm_mutex);
2561 EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes);
2564 * snd_soc_dapm_new_widgets - add new dapm widgets
2565 * @dapm: DAPM context
2567 * Checks the codec for any new dapm widgets and creates them if found.
2569 * Returns 0 for success.
2571 int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context *dapm)
2573 struct snd_soc_dapm_widget *w;
2576 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2578 list_for_each_entry(w, &dapm->card->widgets, list)
2583 if (w->num_kcontrols) {
2584 w->kcontrols = kzalloc(w->num_kcontrols *
2585 sizeof(struct snd_kcontrol *),
2587 if (!w->kcontrols) {
2588 mutex_unlock(&dapm->card->dapm_mutex);
2594 case snd_soc_dapm_switch:
2595 case snd_soc_dapm_mixer:
2596 case snd_soc_dapm_mixer_named_ctl:
2599 case snd_soc_dapm_mux:
2600 case snd_soc_dapm_virt_mux:
2601 case snd_soc_dapm_value_mux:
2604 case snd_soc_dapm_pga:
2605 case snd_soc_dapm_out_drv:
2612 /* Read the initial power state from the device */
2614 val = soc_widget_read(w, w->reg);
2615 val &= 1 << w->shift;
2625 dapm_mark_dirty(w, "new widget");
2626 dapm_debugfs_add_widget(w);
2629 dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
2630 mutex_unlock(&dapm->card->dapm_mutex);
2633 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
2636 * snd_soc_dapm_get_volsw - dapm mixer get callback
2637 * @kcontrol: mixer control
2638 * @ucontrol: control element information
2640 * Callback to get the value of a dapm mixer control.
2642 * Returns 0 for success.
2644 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
2645 struct snd_ctl_elem_value *ucontrol)
2647 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2648 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2649 struct soc_mixer_control *mc =
2650 (struct soc_mixer_control *)kcontrol->private_value;
2651 unsigned int reg = mc->reg;
2652 unsigned int shift = mc->shift;
2654 unsigned int mask = (1 << fls(max)) - 1;
2655 unsigned int invert = mc->invert;
2657 if (snd_soc_volsw_is_stereo(mc))
2658 dev_warn(widget->dapm->dev,
2659 "ASoC: Control '%s' is stereo, which is not supported\n",
2662 ucontrol->value.integer.value[0] =
2663 (snd_soc_read(widget->codec, reg) >> shift) & mask;
2665 ucontrol->value.integer.value[0] =
2666 max - ucontrol->value.integer.value[0];
2670 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
2673 * snd_soc_dapm_put_volsw - dapm mixer set callback
2674 * @kcontrol: mixer control
2675 * @ucontrol: control element information
2677 * Callback to set the value of a dapm mixer control.
2679 * Returns 0 for success.
2681 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
2682 struct snd_ctl_elem_value *ucontrol)
2684 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2685 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2686 struct snd_soc_codec *codec = widget->codec;
2687 struct snd_soc_card *card = codec->card;
2688 struct soc_mixer_control *mc =
2689 (struct soc_mixer_control *)kcontrol->private_value;
2690 unsigned int reg = mc->reg;
2691 unsigned int shift = mc->shift;
2693 unsigned int mask = (1 << fls(max)) - 1;
2694 unsigned int invert = mc->invert;
2696 int connect, change;
2697 struct snd_soc_dapm_update update;
2700 if (snd_soc_volsw_is_stereo(mc))
2701 dev_warn(widget->dapm->dev,
2702 "ASoC: Control '%s' is stereo, which is not supported\n",
2705 val = (ucontrol->value.integer.value[0] & mask);
2710 mask = mask << shift;
2713 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2715 change = snd_soc_test_bits(widget->codec, reg, mask, val);
2717 for (wi = 0; wi < wlist->num_widgets; wi++) {
2718 widget = wlist->widgets[wi];
2720 widget->value = val;
2722 update.kcontrol = kcontrol;
2723 update.widget = widget;
2727 widget->dapm->update = &update;
2729 soc_dapm_mixer_update_power(widget, kcontrol, connect);
2731 widget->dapm->update = NULL;
2735 mutex_unlock(&card->dapm_mutex);
2738 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
2741 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
2742 * @kcontrol: mixer control
2743 * @ucontrol: control element information
2745 * Callback to get the value of a dapm enumerated double mixer control.
2747 * Returns 0 for success.
2749 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
2750 struct snd_ctl_elem_value *ucontrol)
2752 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2753 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2754 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2757 val = snd_soc_read(widget->codec, e->reg);
2758 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & e->mask;
2759 if (e->shift_l != e->shift_r)
2760 ucontrol->value.enumerated.item[1] =
2761 (val >> e->shift_r) & e->mask;
2765 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
2768 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
2769 * @kcontrol: mixer control
2770 * @ucontrol: control element information
2772 * Callback to set the value of a dapm enumerated double mixer control.
2774 * Returns 0 for success.
2776 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
2777 struct snd_ctl_elem_value *ucontrol)
2779 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2780 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2781 struct snd_soc_codec *codec = widget->codec;
2782 struct snd_soc_card *card = codec->card;
2783 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2784 unsigned int val, mux, change;
2786 struct snd_soc_dapm_update update;
2789 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2791 mux = ucontrol->value.enumerated.item[0];
2792 val = mux << e->shift_l;
2793 mask = e->mask << e->shift_l;
2794 if (e->shift_l != e->shift_r) {
2795 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2797 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2798 mask |= e->mask << e->shift_r;
2801 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2803 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2805 for (wi = 0; wi < wlist->num_widgets; wi++) {
2806 widget = wlist->widgets[wi];
2808 widget->value = val;
2810 update.kcontrol = kcontrol;
2811 update.widget = widget;
2812 update.reg = e->reg;
2815 widget->dapm->update = &update;
2817 soc_dapm_mux_update_power(widget, kcontrol, mux, e);
2819 widget->dapm->update = NULL;
2823 mutex_unlock(&card->dapm_mutex);
2826 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
2829 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
2830 * @kcontrol: mixer control
2831 * @ucontrol: control element information
2833 * Returns 0 for success.
2835 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
2836 struct snd_ctl_elem_value *ucontrol)
2838 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2839 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2841 ucontrol->value.enumerated.item[0] = widget->value;
2845 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt);
2848 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
2849 * @kcontrol: mixer control
2850 * @ucontrol: control element information
2852 * Returns 0 for success.
2854 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
2855 struct snd_ctl_elem_value *ucontrol)
2857 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2858 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2859 struct snd_soc_codec *codec = widget->codec;
2860 struct snd_soc_card *card = codec->card;
2861 struct soc_enum *e =
2862 (struct soc_enum *)kcontrol->private_value;
2867 if (ucontrol->value.enumerated.item[0] >= e->max)
2870 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2872 change = widget->value != ucontrol->value.enumerated.item[0];
2874 for (wi = 0; wi < wlist->num_widgets; wi++) {
2875 widget = wlist->widgets[wi];
2877 widget->value = ucontrol->value.enumerated.item[0];
2879 soc_dapm_mux_update_power(widget, kcontrol, widget->value, e);
2883 mutex_unlock(&card->dapm_mutex);
2886 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt);
2889 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
2891 * @kcontrol: mixer control
2892 * @ucontrol: control element information
2894 * Callback to get the value of a dapm semi enumerated double mixer control.
2896 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2897 * used for handling bitfield coded enumeration for example.
2899 * Returns 0 for success.
2901 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
2902 struct snd_ctl_elem_value *ucontrol)
2904 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2905 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2906 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2907 unsigned int reg_val, val, mux;
2909 reg_val = snd_soc_read(widget->codec, e->reg);
2910 val = (reg_val >> e->shift_l) & e->mask;
2911 for (mux = 0; mux < e->max; mux++) {
2912 if (val == e->values[mux])
2915 ucontrol->value.enumerated.item[0] = mux;
2916 if (e->shift_l != e->shift_r) {
2917 val = (reg_val >> e->shift_r) & e->mask;
2918 for (mux = 0; mux < e->max; mux++) {
2919 if (val == e->values[mux])
2922 ucontrol->value.enumerated.item[1] = mux;
2927 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
2930 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
2932 * @kcontrol: mixer control
2933 * @ucontrol: control element information
2935 * Callback to set the value of a dapm semi enumerated double mixer control.
2937 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2938 * used for handling bitfield coded enumeration for example.
2940 * Returns 0 for success.
2942 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
2943 struct snd_ctl_elem_value *ucontrol)
2945 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2946 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2947 struct snd_soc_codec *codec = widget->codec;
2948 struct snd_soc_card *card = codec->card;
2949 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2950 unsigned int val, mux, change;
2952 struct snd_soc_dapm_update update;
2955 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2957 mux = ucontrol->value.enumerated.item[0];
2958 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2959 mask = e->mask << e->shift_l;
2960 if (e->shift_l != e->shift_r) {
2961 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2963 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2964 mask |= e->mask << e->shift_r;
2967 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2969 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2971 for (wi = 0; wi < wlist->num_widgets; wi++) {
2972 widget = wlist->widgets[wi];
2974 widget->value = val;
2976 update.kcontrol = kcontrol;
2977 update.widget = widget;
2978 update.reg = e->reg;
2981 widget->dapm->update = &update;
2983 soc_dapm_mux_update_power(widget, kcontrol, mux, e);
2985 widget->dapm->update = NULL;
2989 mutex_unlock(&card->dapm_mutex);
2992 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
2995 * snd_soc_dapm_info_pin_switch - Info for a pin switch
2997 * @kcontrol: mixer control
2998 * @uinfo: control element information
3000 * Callback to provide information about a pin switch control.
3002 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
3003 struct snd_ctl_elem_info *uinfo)
3005 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
3007 uinfo->value.integer.min = 0;
3008 uinfo->value.integer.max = 1;
3012 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
3015 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
3017 * @kcontrol: mixer control
3020 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
3021 struct snd_ctl_elem_value *ucontrol)
3023 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
3024 const char *pin = (const char *)kcontrol->private_value;
3026 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3028 ucontrol->value.integer.value[0] =
3029 snd_soc_dapm_get_pin_status(&card->dapm, pin);
3031 mutex_unlock(&card->dapm_mutex);
3035 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
3038 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
3040 * @kcontrol: mixer control
3043 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
3044 struct snd_ctl_elem_value *ucontrol)
3046 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
3047 const char *pin = (const char *)kcontrol->private_value;
3049 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3051 if (ucontrol->value.integer.value[0])
3052 snd_soc_dapm_enable_pin(&card->dapm, pin);
3054 snd_soc_dapm_disable_pin(&card->dapm, pin);
3056 mutex_unlock(&card->dapm_mutex);
3058 snd_soc_dapm_sync(&card->dapm);
3061 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
3063 static struct snd_soc_dapm_widget *
3064 snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
3065 const struct snd_soc_dapm_widget *widget)
3067 struct snd_soc_dapm_widget *w;
3071 if ((w = dapm_cnew_widget(widget)) == NULL)
3075 case snd_soc_dapm_regulator_supply:
3076 w->regulator = devm_regulator_get(dapm->dev, w->name);
3077 if (IS_ERR(w->regulator)) {
3078 ret = PTR_ERR(w->regulator);
3079 dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n",
3084 if (w->invert & SND_SOC_DAPM_REGULATOR_BYPASS) {
3085 ret = regulator_allow_bypass(w->regulator, true);
3087 dev_warn(w->dapm->dev,
3088 "ASoC: Failed to unbypass %s: %d\n",
3092 case snd_soc_dapm_clock_supply:
3093 #ifdef CONFIG_CLKDEV_LOOKUP
3094 w->clk = devm_clk_get(dapm->dev, w->name);
3095 if (IS_ERR(w->clk)) {
3096 ret = PTR_ERR(w->clk);
3097 dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n",
3109 name_len = strlen(widget->name) + 1;
3110 if (dapm->codec && dapm->codec->name_prefix)
3111 name_len += 1 + strlen(dapm->codec->name_prefix);
3112 w->name = kmalloc(name_len, GFP_KERNEL);
3113 if (w->name == NULL) {
3117 if (dapm->codec && dapm->codec->name_prefix)
3118 snprintf((char *)w->name, name_len, "%s %s",
3119 dapm->codec->name_prefix, widget->name);
3121 snprintf((char *)w->name, name_len, "%s", widget->name);
3124 case snd_soc_dapm_switch:
3125 case snd_soc_dapm_mixer:
3126 case snd_soc_dapm_mixer_named_ctl:
3127 w->power_check = dapm_generic_check_power;
3129 case snd_soc_dapm_mux:
3130 case snd_soc_dapm_virt_mux:
3131 case snd_soc_dapm_value_mux:
3132 w->power_check = dapm_generic_check_power;
3134 case snd_soc_dapm_adc:
3135 case snd_soc_dapm_aif_out:
3136 w->power_check = dapm_adc_check_power;
3138 case snd_soc_dapm_dac:
3139 case snd_soc_dapm_aif_in:
3140 w->power_check = dapm_dac_check_power;
3142 case snd_soc_dapm_pga:
3143 case snd_soc_dapm_out_drv:
3144 case snd_soc_dapm_input:
3145 case snd_soc_dapm_output:
3146 case snd_soc_dapm_micbias:
3147 case snd_soc_dapm_spk:
3148 case snd_soc_dapm_hp:
3149 case snd_soc_dapm_mic:
3150 case snd_soc_dapm_line:
3151 case snd_soc_dapm_dai_link:
3152 w->power_check = dapm_generic_check_power;
3154 case snd_soc_dapm_supply:
3155 case snd_soc_dapm_regulator_supply:
3156 case snd_soc_dapm_clock_supply:
3157 w->power_check = dapm_supply_check_power;
3159 case snd_soc_dapm_dai:
3160 w->power_check = dapm_dai_check_power;
3163 w->power_check = dapm_always_on_check_power;
3168 w->codec = dapm->codec;
3169 w->platform = dapm->platform;
3170 INIT_LIST_HEAD(&w->sources);
3171 INIT_LIST_HEAD(&w->sinks);
3172 INIT_LIST_HEAD(&w->list);
3173 INIT_LIST_HEAD(&w->dirty);
3174 list_add(&w->list, &dapm->card->widgets);
3176 /* machine layer set ups unconnected pins and insertions */
3182 * snd_soc_dapm_new_controls - create new dapm controls
3183 * @dapm: DAPM context
3184 * @widget: widget array
3185 * @num: number of widgets
3187 * Creates new DAPM controls based upon the templates.
3189 * Returns 0 for success else error.
3191 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
3192 const struct snd_soc_dapm_widget *widget,
3195 struct snd_soc_dapm_widget *w;
3199 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
3200 for (i = 0; i < num; i++) {
3201 w = snd_soc_dapm_new_control(dapm, widget);
3204 "ASoC: Failed to create DAPM control %s\n",
3211 mutex_unlock(&dapm->card->dapm_mutex);
3214 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
3216 static int snd_soc_dai_link_event(struct snd_soc_dapm_widget *w,
3217 struct snd_kcontrol *kcontrol, int event)
3219 struct snd_soc_dapm_path *source_p, *sink_p;
3220 struct snd_soc_dai *source, *sink;
3221 const struct snd_soc_pcm_stream *config = w->params;
3222 struct snd_pcm_substream substream;
3223 struct snd_pcm_hw_params *params = NULL;
3228 BUG_ON(list_empty(&w->sources) || list_empty(&w->sinks));
3230 /* We only support a single source and sink, pick the first */
3231 source_p = list_first_entry(&w->sources, struct snd_soc_dapm_path,
3233 sink_p = list_first_entry(&w->sinks, struct snd_soc_dapm_path,
3236 BUG_ON(!source_p || !sink_p);
3237 BUG_ON(!sink_p->source || !source_p->sink);
3238 BUG_ON(!source_p->source || !sink_p->sink);
3240 source = source_p->source->priv;
3241 sink = sink_p->sink->priv;
3243 /* Be a little careful as we don't want to overflow the mask array */
3244 if (config->formats) {
3245 fmt = ffs(config->formats) - 1;
3247 dev_warn(w->dapm->dev, "ASoC: Invalid format %llx specified\n",
3252 /* Currently very limited parameter selection */
3253 params = kzalloc(sizeof(*params), GFP_KERNEL);
3258 snd_mask_set(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), fmt);
3260 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->min =
3262 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->max =
3265 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->min
3266 = config->channels_min;
3267 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->max
3268 = config->channels_max;
3270 memset(&substream, 0, sizeof(substream));
3273 case SND_SOC_DAPM_PRE_PMU:
3274 if (source->driver->ops && source->driver->ops->hw_params) {
3275 substream.stream = SNDRV_PCM_STREAM_CAPTURE;
3276 ret = source->driver->ops->hw_params(&substream,
3279 dev_err(source->dev,
3280 "ASoC: hw_params() failed: %d\n", ret);
3285 if (sink->driver->ops && sink->driver->ops->hw_params) {
3286 substream.stream = SNDRV_PCM_STREAM_PLAYBACK;
3287 ret = sink->driver->ops->hw_params(&substream, params,
3291 "ASoC: hw_params() failed: %d\n", ret);
3297 case SND_SOC_DAPM_POST_PMU:
3298 ret = snd_soc_dai_digital_mute(sink, 0,
3299 SNDRV_PCM_STREAM_PLAYBACK);
3300 if (ret != 0 && ret != -ENOTSUPP)
3301 dev_warn(sink->dev, "ASoC: Failed to unmute: %d\n", ret);
3305 case SND_SOC_DAPM_PRE_PMD:
3306 ret = snd_soc_dai_digital_mute(sink, 1,
3307 SNDRV_PCM_STREAM_PLAYBACK);
3308 if (ret != 0 && ret != -ENOTSUPP)
3309 dev_warn(sink->dev, "ASoC: Failed to mute: %d\n", ret);
3323 int snd_soc_dapm_new_pcm(struct snd_soc_card *card,
3324 const struct snd_soc_pcm_stream *params,
3325 struct snd_soc_dapm_widget *source,
3326 struct snd_soc_dapm_widget *sink)
3328 struct snd_soc_dapm_route routes[2];
3329 struct snd_soc_dapm_widget template;
3330 struct snd_soc_dapm_widget *w;
3334 len = strlen(source->name) + strlen(sink->name) + 2;
3335 link_name = devm_kzalloc(card->dev, len, GFP_KERNEL);
3338 snprintf(link_name, len, "%s-%s", source->name, sink->name);
3340 memset(&template, 0, sizeof(template));
3341 template.reg = SND_SOC_NOPM;
3342 template.id = snd_soc_dapm_dai_link;
3343 template.name = link_name;
3344 template.event = snd_soc_dai_link_event;
3345 template.event_flags = SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
3346 SND_SOC_DAPM_PRE_PMD;
3348 dev_dbg(card->dev, "ASoC: adding %s widget\n", link_name);
3350 w = snd_soc_dapm_new_control(&card->dapm, &template);
3352 dev_err(card->dev, "ASoC: Failed to create %s widget\n",
3359 memset(&routes, 0, sizeof(routes));
3361 routes[0].source = source->name;
3362 routes[0].sink = link_name;
3363 routes[1].source = link_name;
3364 routes[1].sink = sink->name;
3366 return snd_soc_dapm_add_routes(&card->dapm, routes,
3367 ARRAY_SIZE(routes));
3370 int snd_soc_dapm_new_dai_widgets(struct snd_soc_dapm_context *dapm,
3371 struct snd_soc_dai *dai)
3373 struct snd_soc_dapm_widget template;
3374 struct snd_soc_dapm_widget *w;
3376 WARN_ON(dapm->dev != dai->dev);
3378 memset(&template, 0, sizeof(template));
3379 template.reg = SND_SOC_NOPM;
3381 if (dai->driver->playback.stream_name) {
3382 template.id = snd_soc_dapm_dai;
3383 template.name = dai->driver->playback.stream_name;
3384 template.sname = dai->driver->playback.stream_name;
3386 dev_dbg(dai->dev, "ASoC: adding %s widget\n",
3389 w = snd_soc_dapm_new_control(dapm, &template);
3391 dev_err(dapm->dev, "ASoC: Failed to create %s widget\n",
3392 dai->driver->playback.stream_name);
3396 dai->playback_widget = w;
3399 if (dai->driver->capture.stream_name) {
3400 template.id = snd_soc_dapm_dai;
3401 template.name = dai->driver->capture.stream_name;
3402 template.sname = dai->driver->capture.stream_name;
3404 dev_dbg(dai->dev, "ASoC: adding %s widget\n",
3407 w = snd_soc_dapm_new_control(dapm, &template);
3409 dev_err(dapm->dev, "ASoC: Failed to create %s widget\n",
3410 dai->driver->capture.stream_name);
3414 dai->capture_widget = w;
3420 int snd_soc_dapm_link_dai_widgets(struct snd_soc_card *card)
3422 struct snd_soc_dapm_widget *dai_w, *w;
3423 struct snd_soc_dai *dai;
3424 struct snd_soc_dapm_route r;
3426 memset(&r, 0, sizeof(r));
3428 /* For each DAI widget... */
3429 list_for_each_entry(dai_w, &card->widgets, list) {
3430 if (dai_w->id != snd_soc_dapm_dai)
3435 /* ...find all widgets with the same stream and link them */
3436 list_for_each_entry(w, &card->widgets, list) {
3437 if (w->dapm != dai_w->dapm)
3440 if (w->id == snd_soc_dapm_dai)
3446 if (dai->driver->playback.stream_name &&
3448 dai->driver->playback.stream_name)) {
3449 r.source = dai->playback_widget->name;
3451 dev_dbg(dai->dev, "%s -> %s\n",
3454 snd_soc_dapm_add_route(w->dapm, &r);
3457 if (dai->driver->capture.stream_name &&
3459 dai->driver->capture.stream_name)) {
3461 r.sink = dai->capture_widget->name;
3462 dev_dbg(dai->dev, "%s -> %s\n",
3465 snd_soc_dapm_add_route(w->dapm, &r);
3473 static void soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
3477 struct snd_soc_dapm_widget *w_cpu, *w_codec;
3478 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
3479 struct snd_soc_dai *codec_dai = rtd->codec_dai;
3481 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
3482 w_cpu = cpu_dai->playback_widget;
3483 w_codec = codec_dai->playback_widget;
3485 w_cpu = cpu_dai->capture_widget;
3486 w_codec = codec_dai->capture_widget;
3491 dapm_mark_dirty(w_cpu, "stream event");
3494 case SND_SOC_DAPM_STREAM_START:
3497 case SND_SOC_DAPM_STREAM_STOP:
3500 case SND_SOC_DAPM_STREAM_SUSPEND:
3501 case SND_SOC_DAPM_STREAM_RESUME:
3502 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
3503 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
3510 dapm_mark_dirty(w_codec, "stream event");
3513 case SND_SOC_DAPM_STREAM_START:
3514 w_codec->active = 1;
3516 case SND_SOC_DAPM_STREAM_STOP:
3517 w_codec->active = 0;
3519 case SND_SOC_DAPM_STREAM_SUSPEND:
3520 case SND_SOC_DAPM_STREAM_RESUME:
3521 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
3522 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
3527 dapm_power_widgets(&rtd->card->dapm, event);
3531 * snd_soc_dapm_stream_event - send a stream event to the dapm core
3532 * @rtd: PCM runtime data
3533 * @stream: stream name
3534 * @event: stream event
3536 * Sends a stream event to the dapm core. The core then makes any
3537 * necessary widget power changes.
3539 * Returns 0 for success else error.
3541 void snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
3544 struct snd_soc_card *card = rtd->card;
3546 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3547 soc_dapm_stream_event(rtd, stream, event);
3548 mutex_unlock(&card->dapm_mutex);
3552 * snd_soc_dapm_enable_pin - enable pin.
3553 * @dapm: DAPM context
3556 * Enables input/output pin and its parents or children widgets iff there is
3557 * a valid audio route and active audio stream.
3558 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3559 * do any widget power switching.
3561 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
3563 return snd_soc_dapm_set_pin(dapm, pin, 1);
3565 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
3568 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
3569 * @dapm: DAPM context
3572 * Enables input/output pin regardless of any other state. This is
3573 * intended for use with microphone bias supplies used in microphone
3576 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3577 * do any widget power switching.
3579 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
3582 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
3585 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
3589 dev_dbg(w->dapm->dev, "ASoC: force enable pin %s\n", pin);
3592 dapm_mark_dirty(w, "force enable");
3596 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
3599 * snd_soc_dapm_disable_pin - disable pin.
3600 * @dapm: DAPM context
3603 * Disables input/output pin and its parents or children widgets.
3604 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3605 * do any widget power switching.
3607 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
3610 return snd_soc_dapm_set_pin(dapm, pin, 0);
3612 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
3615 * snd_soc_dapm_nc_pin - permanently disable pin.
3616 * @dapm: DAPM context
3619 * Marks the specified pin as being not connected, disabling it along
3620 * any parent or child widgets. At present this is identical to
3621 * snd_soc_dapm_disable_pin() but in future it will be extended to do
3622 * additional things such as disabling controls which only affect
3623 * paths through the pin.
3625 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3626 * do any widget power switching.
3628 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
3630 return snd_soc_dapm_set_pin(dapm, pin, 0);
3632 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
3635 * snd_soc_dapm_get_pin_status - get audio pin status
3636 * @dapm: DAPM context
3637 * @pin: audio signal pin endpoint (or start point)
3639 * Get audio pin status - connected or disconnected.
3641 * Returns 1 for connected otherwise 0.
3643 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
3646 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
3649 return w->connected;
3653 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
3656 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
3657 * @dapm: DAPM context
3658 * @pin: audio signal pin endpoint (or start point)
3660 * Mark the given endpoint or pin as ignoring suspend. When the
3661 * system is disabled a path between two endpoints flagged as ignoring
3662 * suspend will not be disabled. The path must already be enabled via
3663 * normal means at suspend time, it will not be turned on if it was not
3666 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
3669 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
3672 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
3676 w->ignore_suspend = 1;
3680 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
3682 static bool snd_soc_dapm_widget_in_card_paths(struct snd_soc_card *card,
3683 struct snd_soc_dapm_widget *w)
3685 struct snd_soc_dapm_path *p;
3687 list_for_each_entry(p, &card->paths, list) {
3688 if ((p->source == w) || (p->sink == w)) {
3690 "... Path %s(id:%d dapm:%p) - %s(id:%d dapm:%p)\n",
3691 p->source->name, p->source->id, p->source->dapm,
3692 p->sink->name, p->sink->id, p->sink->dapm);
3694 /* Connected to something other than the codec */
3695 if (p->source->dapm != p->sink->dapm)
3698 * Loopback connection from codec external pin to
3699 * codec external pin
3701 if (p->sink->id == snd_soc_dapm_input) {
3702 switch (p->source->id) {
3703 case snd_soc_dapm_output:
3704 case snd_soc_dapm_micbias:
3717 * snd_soc_dapm_auto_nc_codec_pins - call snd_soc_dapm_nc_pin for unused pins
3718 * @codec: The codec whose pins should be processed
3720 * Automatically call snd_soc_dapm_nc_pin() for any external pins in the codec
3721 * which are unused. Pins are used if they are connected externally to the
3722 * codec, whether that be to some other device, or a loop-back connection to
3725 void snd_soc_dapm_auto_nc_codec_pins(struct snd_soc_codec *codec)
3727 struct snd_soc_card *card = codec->card;
3728 struct snd_soc_dapm_context *dapm = &codec->dapm;
3729 struct snd_soc_dapm_widget *w;
3731 dev_dbg(codec->dev, "ASoC: Auto NC: DAPMs: card:%p codec:%p\n",
3732 &card->dapm, &codec->dapm);
3734 list_for_each_entry(w, &card->widgets, list) {
3735 if (w->dapm != dapm)
3738 case snd_soc_dapm_input:
3739 case snd_soc_dapm_output:
3740 case snd_soc_dapm_micbias:
3741 dev_dbg(codec->dev, "ASoC: Auto NC: Checking widget %s\n",
3743 if (!snd_soc_dapm_widget_in_card_paths(card, w)) {
3745 "... Not in map; disabling\n");
3746 snd_soc_dapm_nc_pin(dapm, w->name);
3756 * snd_soc_dapm_free - free dapm resources
3757 * @dapm: DAPM context
3759 * Free all dapm widgets and resources.
3761 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
3763 snd_soc_dapm_sys_remove(dapm->dev);
3764 dapm_debugfs_cleanup(dapm);
3765 dapm_free_widgets(dapm);
3766 list_del(&dapm->list);
3768 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
3770 static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context *dapm)
3772 struct snd_soc_card *card = dapm->card;
3773 struct snd_soc_dapm_widget *w;
3774 LIST_HEAD(down_list);
3777 mutex_lock(&card->dapm_mutex);
3779 list_for_each_entry(w, &dapm->card->widgets, list) {
3780 if (w->dapm != dapm)
3783 dapm_seq_insert(w, &down_list, false);
3789 /* If there were no widgets to power down we're already in
3793 if (dapm->bias_level == SND_SOC_BIAS_ON)
3794 snd_soc_dapm_set_bias_level(dapm,
3795 SND_SOC_BIAS_PREPARE);
3796 dapm_seq_run(dapm, &down_list, 0, false);
3797 if (dapm->bias_level == SND_SOC_BIAS_PREPARE)
3798 snd_soc_dapm_set_bias_level(dapm,
3799 SND_SOC_BIAS_STANDBY);
3802 mutex_unlock(&card->dapm_mutex);
3806 * snd_soc_dapm_shutdown - callback for system shutdown
3808 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
3810 struct snd_soc_codec *codec;
3812 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
3813 soc_dapm_shutdown_codec(&codec->dapm);
3814 if (codec->dapm.bias_level == SND_SOC_BIAS_STANDBY)
3815 snd_soc_dapm_set_bias_level(&codec->dapm,
3820 /* Module information */
3821 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3822 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
3823 MODULE_LICENSE("GPL");