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/slab.h>
39 #include <sound/core.h>
40 #include <sound/pcm.h>
41 #include <sound/pcm_params.h>
42 #include <sound/soc.h>
43 #include <sound/initval.h>
45 #include <trace/events/asoc.h>
47 #define DAPM_UPDATE_STAT(widget, val) widget->dapm->card->dapm_stats.val++;
49 /* dapm power sequences - make this per codec in the future */
50 static int dapm_up_seq[] = {
51 [snd_soc_dapm_pre] = 0,
52 [snd_soc_dapm_supply] = 1,
53 [snd_soc_dapm_regulator_supply] = 1,
54 [snd_soc_dapm_micbias] = 2,
55 [snd_soc_dapm_dai] = 3,
56 [snd_soc_dapm_aif_in] = 3,
57 [snd_soc_dapm_aif_out] = 3,
58 [snd_soc_dapm_mic] = 4,
59 [snd_soc_dapm_mux] = 5,
60 [snd_soc_dapm_virt_mux] = 5,
61 [snd_soc_dapm_value_mux] = 5,
62 [snd_soc_dapm_dac] = 6,
63 [snd_soc_dapm_mixer] = 7,
64 [snd_soc_dapm_mixer_named_ctl] = 7,
65 [snd_soc_dapm_pga] = 8,
66 [snd_soc_dapm_adc] = 9,
67 [snd_soc_dapm_out_drv] = 10,
68 [snd_soc_dapm_hp] = 10,
69 [snd_soc_dapm_spk] = 10,
70 [snd_soc_dapm_post] = 11,
73 static int dapm_down_seq[] = {
74 [snd_soc_dapm_pre] = 0,
75 [snd_soc_dapm_adc] = 1,
76 [snd_soc_dapm_hp] = 2,
77 [snd_soc_dapm_spk] = 2,
78 [snd_soc_dapm_out_drv] = 2,
79 [snd_soc_dapm_pga] = 4,
80 [snd_soc_dapm_mixer_named_ctl] = 5,
81 [snd_soc_dapm_mixer] = 5,
82 [snd_soc_dapm_dac] = 6,
83 [snd_soc_dapm_mic] = 7,
84 [snd_soc_dapm_micbias] = 8,
85 [snd_soc_dapm_mux] = 9,
86 [snd_soc_dapm_virt_mux] = 9,
87 [snd_soc_dapm_value_mux] = 9,
88 [snd_soc_dapm_aif_in] = 10,
89 [snd_soc_dapm_aif_out] = 10,
90 [snd_soc_dapm_dai] = 10,
91 [snd_soc_dapm_regulator_supply] = 11,
92 [snd_soc_dapm_supply] = 11,
93 [snd_soc_dapm_post] = 12,
96 static void pop_wait(u32 pop_time)
99 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
102 static void pop_dbg(struct device *dev, u32 pop_time, const char *fmt, ...)
110 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
115 vsnprintf(buf, PAGE_SIZE, fmt, args);
116 dev_info(dev, "%s", buf);
122 static bool dapm_dirty_widget(struct snd_soc_dapm_widget *w)
124 return !list_empty(&w->dirty);
127 void dapm_mark_dirty(struct snd_soc_dapm_widget *w, const char *reason)
129 if (!dapm_dirty_widget(w)) {
130 dev_vdbg(w->dapm->dev, "Marking %s dirty due to %s\n",
132 list_add_tail(&w->dirty, &w->dapm->card->dapm_dirty);
135 EXPORT_SYMBOL_GPL(dapm_mark_dirty);
137 /* create a new dapm widget */
138 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
139 const struct snd_soc_dapm_widget *_widget)
141 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
144 /* get snd_card from DAPM context */
145 static inline struct snd_card *dapm_get_snd_card(
146 struct snd_soc_dapm_context *dapm)
149 return dapm->codec->card->snd_card;
150 else if (dapm->platform)
151 return dapm->platform->card->snd_card;
159 /* get soc_card from DAPM context */
160 static inline struct snd_soc_card *dapm_get_soc_card(
161 struct snd_soc_dapm_context *dapm)
164 return dapm->codec->card;
165 else if (dapm->platform)
166 return dapm->platform->card;
174 static void dapm_reset(struct snd_soc_card *card)
176 struct snd_soc_dapm_widget *w;
178 memset(&card->dapm_stats, 0, sizeof(card->dapm_stats));
180 list_for_each_entry(w, &card->widgets, list) {
181 w->power_checked = false;
187 static int soc_widget_read(struct snd_soc_dapm_widget *w, int reg)
190 return snd_soc_read(w->codec, reg);
191 else if (w->platform)
192 return snd_soc_platform_read(w->platform, reg);
194 dev_err(w->dapm->dev, "no valid widget read method\n");
198 static int soc_widget_write(struct snd_soc_dapm_widget *w, int reg, int val)
201 return snd_soc_write(w->codec, reg, val);
202 else if (w->platform)
203 return snd_soc_platform_write(w->platform, reg, val);
205 dev_err(w->dapm->dev, "no valid widget write method\n");
209 static inline void soc_widget_lock(struct snd_soc_dapm_widget *w)
211 if (w->codec && !w->codec->using_regmap)
212 mutex_lock(&w->codec->mutex);
213 else if (w->platform)
214 mutex_lock(&w->platform->mutex);
217 static inline void soc_widget_unlock(struct snd_soc_dapm_widget *w)
219 if (w->codec && !w->codec->using_regmap)
220 mutex_unlock(&w->codec->mutex);
221 else if (w->platform)
222 mutex_unlock(&w->platform->mutex);
225 static int soc_widget_update_bits_locked(struct snd_soc_dapm_widget *w,
226 unsigned short reg, unsigned int mask, unsigned int value)
229 unsigned int old, new;
232 if (w->codec && w->codec->using_regmap) {
233 ret = regmap_update_bits_check(w->codec->control_data,
234 reg, mask, value, &change);
239 ret = soc_widget_read(w, reg);
241 soc_widget_unlock(w);
246 new = (old & ~mask) | (value & mask);
249 ret = soc_widget_write(w, reg, new);
251 soc_widget_unlock(w);
255 soc_widget_unlock(w);
262 * snd_soc_dapm_set_bias_level - set the bias level for the system
263 * @dapm: DAPM context
264 * @level: level to configure
266 * Configure the bias (power) levels for the SoC audio device.
268 * Returns 0 for success else error.
270 static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm,
271 enum snd_soc_bias_level level)
273 struct snd_soc_card *card = dapm->card;
276 trace_snd_soc_bias_level_start(card, level);
278 if (card && card->set_bias_level)
279 ret = card->set_bias_level(card, dapm, level);
284 if (dapm->codec->driver->set_bias_level)
285 ret = dapm->codec->driver->set_bias_level(dapm->codec,
288 dapm->bias_level = level;
293 if (card && card->set_bias_level_post)
294 ret = card->set_bias_level_post(card, dapm, level);
296 trace_snd_soc_bias_level_done(card, level);
301 /* set up initial codec paths */
302 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
303 struct snd_soc_dapm_path *p, int i)
306 case snd_soc_dapm_switch:
307 case snd_soc_dapm_mixer:
308 case snd_soc_dapm_mixer_named_ctl: {
310 struct soc_mixer_control *mc = (struct soc_mixer_control *)
311 w->kcontrol_news[i].private_value;
312 unsigned int reg = mc->reg;
313 unsigned int shift = mc->shift;
315 unsigned int mask = (1 << fls(max)) - 1;
316 unsigned int invert = mc->invert;
318 val = soc_widget_read(w, reg);
319 val = (val >> shift) & mask;
321 if ((invert && !val) || (!invert && val))
327 case snd_soc_dapm_mux: {
328 struct soc_enum *e = (struct soc_enum *)
329 w->kcontrol_news[i].private_value;
330 int val, item, bitmask;
332 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
334 val = soc_widget_read(w, e->reg);
335 item = (val >> e->shift_l) & (bitmask - 1);
338 for (i = 0; i < e->max; i++) {
339 if (!(strcmp(p->name, e->texts[i])) && item == i)
344 case snd_soc_dapm_virt_mux: {
345 struct soc_enum *e = (struct soc_enum *)
346 w->kcontrol_news[i].private_value;
349 /* since a virtual mux has no backing registers to
350 * decide which path to connect, it will try to match
351 * with the first enumeration. This is to ensure
352 * that the default mux choice (the first) will be
353 * correctly powered up during initialization.
355 if (!strcmp(p->name, e->texts[0]))
359 case snd_soc_dapm_value_mux: {
360 struct soc_enum *e = (struct soc_enum *)
361 w->kcontrol_news[i].private_value;
364 val = soc_widget_read(w, e->reg);
365 val = (val >> e->shift_l) & e->mask;
366 for (item = 0; item < e->max; item++) {
367 if (val == e->values[item])
372 for (i = 0; i < e->max; i++) {
373 if (!(strcmp(p->name, e->texts[i])) && item == i)
378 /* does not affect routing - always connected */
379 case snd_soc_dapm_pga:
380 case snd_soc_dapm_out_drv:
381 case snd_soc_dapm_output:
382 case snd_soc_dapm_adc:
383 case snd_soc_dapm_input:
384 case snd_soc_dapm_siggen:
385 case snd_soc_dapm_dac:
386 case snd_soc_dapm_micbias:
387 case snd_soc_dapm_vmid:
388 case snd_soc_dapm_supply:
389 case snd_soc_dapm_regulator_supply:
390 case snd_soc_dapm_aif_in:
391 case snd_soc_dapm_aif_out:
392 case snd_soc_dapm_dai:
393 case snd_soc_dapm_hp:
394 case snd_soc_dapm_mic:
395 case snd_soc_dapm_spk:
396 case snd_soc_dapm_line:
399 /* does affect routing - dynamically connected */
400 case snd_soc_dapm_pre:
401 case snd_soc_dapm_post:
407 /* connect mux widget to its interconnecting audio paths */
408 static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
409 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
410 struct snd_soc_dapm_path *path, const char *control_name,
411 const struct snd_kcontrol_new *kcontrol)
413 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
416 for (i = 0; i < e->max; i++) {
417 if (!(strcmp(control_name, e->texts[i]))) {
418 list_add(&path->list, &dapm->card->paths);
419 list_add(&path->list_sink, &dest->sources);
420 list_add(&path->list_source, &src->sinks);
421 path->name = (char*)e->texts[i];
422 dapm_set_path_status(dest, path, 0);
430 /* connect mixer widget to its interconnecting audio paths */
431 static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
432 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
433 struct snd_soc_dapm_path *path, const char *control_name)
437 /* search for mixer kcontrol */
438 for (i = 0; i < dest->num_kcontrols; i++) {
439 if (!strcmp(control_name, dest->kcontrol_news[i].name)) {
440 list_add(&path->list, &dapm->card->paths);
441 list_add(&path->list_sink, &dest->sources);
442 list_add(&path->list_source, &src->sinks);
443 path->name = dest->kcontrol_news[i].name;
444 dapm_set_path_status(dest, path, i);
451 static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm,
452 struct snd_soc_dapm_widget *kcontrolw,
453 const struct snd_kcontrol_new *kcontrol_new,
454 struct snd_kcontrol **kcontrol)
456 struct snd_soc_dapm_widget *w;
461 list_for_each_entry(w, &dapm->card->widgets, list) {
462 if (w == kcontrolw || w->dapm != kcontrolw->dapm)
464 for (i = 0; i < w->num_kcontrols; i++) {
465 if (&w->kcontrol_news[i] == kcontrol_new) {
467 *kcontrol = w->kcontrols[i];
476 /* create new dapm mixer control */
477 static int dapm_new_mixer(struct snd_soc_dapm_widget *w)
479 struct snd_soc_dapm_context *dapm = w->dapm;
481 size_t name_len, prefix_len;
482 struct snd_soc_dapm_path *path;
483 struct snd_card *card = dapm->card->snd_card;
485 struct snd_soc_dapm_widget_list *wlist;
489 prefix = dapm->codec->name_prefix;
494 prefix_len = strlen(prefix) + 1;
499 for (i = 0; i < w->num_kcontrols; i++) {
502 list_for_each_entry(path, &w->sources, list_sink) {
504 /* mixer/mux paths name must match control name */
505 if (path->name != (char *)w->kcontrol_news[i].name)
508 if (w->kcontrols[i]) {
509 path->kcontrol = w->kcontrols[i];
513 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
514 sizeof(struct snd_soc_dapm_widget *),
515 wlist = kzalloc(wlistsize, GFP_KERNEL);
518 "asoc: can't allocate widget list for %s\n",
522 wlist->num_widgets = 1;
523 wlist->widgets[0] = w;
525 /* add dapm control with long name.
526 * for dapm_mixer this is the concatenation of the
527 * mixer and kcontrol name.
528 * for dapm_mixer_named_ctl this is simply the
531 name_len = strlen(w->kcontrol_news[i].name) + 1;
532 if (w->id != snd_soc_dapm_mixer_named_ctl)
533 name_len += 1 + strlen(w->name);
535 path->long_name = kmalloc(name_len, GFP_KERNEL);
537 if (path->long_name == NULL) {
544 /* The control will get a prefix from
545 * the control creation process but
546 * we're also using the same prefix
547 * for widgets so cut the prefix off
548 * the front of the widget name.
550 snprintf((char *)path->long_name, name_len,
551 "%s %s", w->name + prefix_len,
552 w->kcontrol_news[i].name);
554 case snd_soc_dapm_mixer_named_ctl:
555 snprintf((char *)path->long_name, name_len,
556 "%s", w->kcontrol_news[i].name);
560 ((char *)path->long_name)[name_len - 1] = '\0';
562 path->kcontrol = snd_soc_cnew(&w->kcontrol_news[i],
563 wlist, path->long_name,
565 ret = snd_ctl_add(card, path->kcontrol);
568 "asoc: failed to add dapm kcontrol %s: %d\n",
569 path->long_name, ret);
571 kfree(path->long_name);
572 path->long_name = NULL;
575 w->kcontrols[i] = path->kcontrol;
581 /* create new dapm mux control */
582 static int dapm_new_mux(struct snd_soc_dapm_widget *w)
584 struct snd_soc_dapm_context *dapm = w->dapm;
585 struct snd_soc_dapm_path *path = NULL;
586 struct snd_kcontrol *kcontrol;
587 struct snd_card *card = dapm->card->snd_card;
591 struct snd_soc_dapm_widget_list *wlist;
592 int shared, wlistentries;
596 if (w->num_kcontrols != 1) {
598 "asoc: mux %s has incorrect number of controls\n",
603 shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[0],
606 wlist = kcontrol->private_data;
607 wlistentries = wlist->num_widgets + 1;
612 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
613 wlistentries * sizeof(struct snd_soc_dapm_widget *),
614 wlist = krealloc(wlist, wlistsize, GFP_KERNEL);
617 "asoc: can't allocate widget list for %s\n", w->name);
620 wlist->num_widgets = wlistentries;
621 wlist->widgets[wlistentries - 1] = w;
625 prefix = dapm->codec->name_prefix;
630 name = w->kcontrol_news[0].name;
635 prefix_len = strlen(prefix) + 1;
641 * The control will get a prefix from the control creation
642 * process but we're also using the same prefix for widgets so
643 * cut the prefix off the front of the widget name.
645 kcontrol = snd_soc_cnew(&w->kcontrol_news[0], wlist,
646 name + prefix_len, prefix);
647 ret = snd_ctl_add(card, kcontrol);
649 dev_err(dapm->dev, "failed to add kcontrol %s: %d\n",
656 kcontrol->private_data = wlist;
658 w->kcontrols[0] = kcontrol;
660 list_for_each_entry(path, &w->sources, list_sink)
661 path->kcontrol = kcontrol;
666 /* create new dapm volume control */
667 static int dapm_new_pga(struct snd_soc_dapm_widget *w)
669 if (w->num_kcontrols)
670 dev_err(w->dapm->dev,
671 "asoc: PGA controls not supported: '%s'\n", w->name);
676 /* reset 'walked' bit for each dapm path */
677 static inline void dapm_clear_walk(struct snd_soc_dapm_context *dapm)
679 struct snd_soc_dapm_path *p;
681 list_for_each_entry(p, &dapm->card->paths, list)
685 /* We implement power down on suspend by checking the power state of
686 * the ALSA card - when we are suspending the ALSA state for the card
689 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
691 int level = snd_power_get_state(widget->dapm->card->snd_card);
694 case SNDRV_CTL_POWER_D3hot:
695 case SNDRV_CTL_POWER_D3cold:
696 if (widget->ignore_suspend)
697 dev_dbg(widget->dapm->dev, "%s ignoring suspend\n",
699 return widget->ignore_suspend;
706 * Recursively check for a completed path to an active or physically connected
707 * output widget. Returns number of complete paths.
709 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
711 struct snd_soc_dapm_path *path;
714 if (widget->outputs >= 0)
715 return widget->outputs;
717 DAPM_UPDATE_STAT(widget, path_checks);
719 switch (widget->id) {
720 case snd_soc_dapm_supply:
721 case snd_soc_dapm_regulator_supply:
727 switch (widget->id) {
728 case snd_soc_dapm_adc:
729 case snd_soc_dapm_aif_out:
730 case snd_soc_dapm_dai:
731 if (widget->active) {
732 widget->outputs = snd_soc_dapm_suspend_check(widget);
733 return widget->outputs;
739 if (widget->connected) {
740 /* connected pin ? */
741 if (widget->id == snd_soc_dapm_output && !widget->ext) {
742 widget->outputs = snd_soc_dapm_suspend_check(widget);
743 return widget->outputs;
746 /* connected jack or spk ? */
747 if (widget->id == snd_soc_dapm_hp ||
748 widget->id == snd_soc_dapm_spk ||
749 (widget->id == snd_soc_dapm_line &&
750 !list_empty(&widget->sources))) {
751 widget->outputs = snd_soc_dapm_suspend_check(widget);
752 return widget->outputs;
756 list_for_each_entry(path, &widget->sinks, list_source) {
757 DAPM_UPDATE_STAT(widget, neighbour_checks);
765 if (path->sink && path->connect) {
767 con += is_connected_output_ep(path->sink);
771 widget->outputs = con;
777 * Recursively check for a completed path to an active or physically connected
778 * input widget. Returns number of complete paths.
780 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
782 struct snd_soc_dapm_path *path;
785 if (widget->inputs >= 0)
786 return widget->inputs;
788 DAPM_UPDATE_STAT(widget, path_checks);
790 switch (widget->id) {
791 case snd_soc_dapm_supply:
792 case snd_soc_dapm_regulator_supply:
798 /* active stream ? */
799 switch (widget->id) {
800 case snd_soc_dapm_dac:
801 case snd_soc_dapm_aif_in:
802 case snd_soc_dapm_dai:
803 if (widget->active) {
804 widget->inputs = snd_soc_dapm_suspend_check(widget);
805 return widget->inputs;
811 if (widget->connected) {
812 /* connected pin ? */
813 if (widget->id == snd_soc_dapm_input && !widget->ext) {
814 widget->inputs = snd_soc_dapm_suspend_check(widget);
815 return widget->inputs;
818 /* connected VMID/Bias for lower pops */
819 if (widget->id == snd_soc_dapm_vmid) {
820 widget->inputs = snd_soc_dapm_suspend_check(widget);
821 return widget->inputs;
824 /* connected jack ? */
825 if (widget->id == snd_soc_dapm_mic ||
826 (widget->id == snd_soc_dapm_line &&
827 !list_empty(&widget->sinks))) {
828 widget->inputs = snd_soc_dapm_suspend_check(widget);
829 return widget->inputs;
832 /* signal generator */
833 if (widget->id == snd_soc_dapm_siggen) {
834 widget->inputs = snd_soc_dapm_suspend_check(widget);
835 return widget->inputs;
839 list_for_each_entry(path, &widget->sources, list_sink) {
840 DAPM_UPDATE_STAT(widget, neighbour_checks);
848 if (path->source && path->connect) {
850 con += is_connected_input_ep(path->source);
854 widget->inputs = con;
860 * Handler for generic register modifier widget.
862 int dapm_reg_event(struct snd_soc_dapm_widget *w,
863 struct snd_kcontrol *kcontrol, int event)
867 if (SND_SOC_DAPM_EVENT_ON(event))
872 soc_widget_update_bits_locked(w, -(w->reg + 1),
873 w->mask << w->shift, val << w->shift);
877 EXPORT_SYMBOL_GPL(dapm_reg_event);
880 * Handler for regulator supply widget.
882 int dapm_regulator_event(struct snd_soc_dapm_widget *w,
883 struct snd_kcontrol *kcontrol, int event)
885 if (SND_SOC_DAPM_EVENT_ON(event))
886 return regulator_enable(w->regulator);
888 return regulator_disable_deferred(w->regulator, w->shift);
890 EXPORT_SYMBOL_GPL(dapm_regulator_event);
892 static int dapm_widget_power_check(struct snd_soc_dapm_widget *w)
894 if (w->power_checked)
900 w->new_power = w->power_check(w);
902 w->power_checked = true;
907 /* Generic check to see if a widget should be powered.
909 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
913 DAPM_UPDATE_STAT(w, power_checks);
915 in = is_connected_input_ep(w);
916 dapm_clear_walk(w->dapm);
917 out = is_connected_output_ep(w);
918 dapm_clear_walk(w->dapm);
919 return out != 0 && in != 0;
922 static int dapm_dai_check_power(struct snd_soc_dapm_widget *w)
924 DAPM_UPDATE_STAT(w, power_checks);
929 /* Check to see if an ADC has power */
930 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
934 DAPM_UPDATE_STAT(w, power_checks);
937 in = is_connected_input_ep(w);
938 dapm_clear_walk(w->dapm);
941 return dapm_generic_check_power(w);
945 /* Check to see if a DAC has power */
946 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
950 DAPM_UPDATE_STAT(w, power_checks);
953 out = is_connected_output_ep(w);
954 dapm_clear_walk(w->dapm);
957 return dapm_generic_check_power(w);
961 /* Check to see if a power supply is needed */
962 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
964 struct snd_soc_dapm_path *path;
966 DAPM_UPDATE_STAT(w, power_checks);
968 /* Check if one of our outputs is connected */
969 list_for_each_entry(path, &w->sinks, list_source) {
970 DAPM_UPDATE_STAT(w, neighbour_checks);
975 if (path->connected &&
976 !path->connected(path->source, path->sink))
982 if (dapm_widget_power_check(path->sink))
986 dapm_clear_walk(w->dapm);
991 static int dapm_always_on_check_power(struct snd_soc_dapm_widget *w)
996 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
997 struct snd_soc_dapm_widget *b,
1005 sort = dapm_down_seq;
1007 if (sort[a->id] != sort[b->id])
1008 return sort[a->id] - sort[b->id];
1009 if (a->subseq != b->subseq) {
1011 return a->subseq - b->subseq;
1013 return b->subseq - a->subseq;
1015 if (a->reg != b->reg)
1016 return a->reg - b->reg;
1017 if (a->dapm != b->dapm)
1018 return (unsigned long)a->dapm - (unsigned long)b->dapm;
1023 /* Insert a widget in order into a DAPM power sequence. */
1024 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
1025 struct list_head *list,
1028 struct snd_soc_dapm_widget *w;
1030 list_for_each_entry(w, list, power_list)
1031 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
1032 list_add_tail(&new_widget->power_list, &w->power_list);
1036 list_add_tail(&new_widget->power_list, list);
1039 static void dapm_seq_check_event(struct snd_soc_dapm_context *dapm,
1040 struct snd_soc_dapm_widget *w, int event)
1042 struct snd_soc_card *card = dapm->card;
1043 const char *ev_name;
1047 case SND_SOC_DAPM_PRE_PMU:
1048 ev_name = "PRE_PMU";
1051 case SND_SOC_DAPM_POST_PMU:
1052 ev_name = "POST_PMU";
1055 case SND_SOC_DAPM_PRE_PMD:
1056 ev_name = "PRE_PMD";
1059 case SND_SOC_DAPM_POST_PMD:
1060 ev_name = "POST_PMD";
1068 if (w->power != power)
1071 if (w->event && (w->event_flags & event)) {
1072 pop_dbg(dapm->dev, card->pop_time, "pop test : %s %s\n",
1074 trace_snd_soc_dapm_widget_event_start(w, event);
1075 ret = w->event(w, NULL, event);
1076 trace_snd_soc_dapm_widget_event_done(w, event);
1078 pr_err("%s: %s event failed: %d\n",
1079 ev_name, w->name, ret);
1083 /* Apply the coalesced changes from a DAPM sequence */
1084 static void dapm_seq_run_coalesced(struct snd_soc_dapm_context *dapm,
1085 struct list_head *pending)
1087 struct snd_soc_card *card = dapm->card;
1088 struct snd_soc_dapm_widget *w;
1090 unsigned int value = 0;
1091 unsigned int mask = 0;
1092 unsigned int cur_mask;
1094 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
1097 list_for_each_entry(w, pending, power_list) {
1098 cur_mask = 1 << w->shift;
1099 BUG_ON(reg != w->reg);
1110 pop_dbg(dapm->dev, card->pop_time,
1111 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
1112 w->name, reg, value, mask);
1114 /* Check for events */
1115 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMU);
1116 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMD);
1120 /* Any widget will do, they should all be updating the
1123 w = list_first_entry(pending, struct snd_soc_dapm_widget,
1126 pop_dbg(dapm->dev, card->pop_time,
1127 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
1128 value, mask, reg, card->pop_time);
1129 pop_wait(card->pop_time);
1130 soc_widget_update_bits_locked(w, reg, mask, value);
1133 list_for_each_entry(w, pending, power_list) {
1134 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMU);
1135 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMD);
1139 /* Apply a DAPM power sequence.
1141 * We walk over a pre-sorted list of widgets to apply power to. In
1142 * order to minimise the number of writes to the device required
1143 * multiple widgets will be updated in a single write where possible.
1144 * Currently anything that requires more than a single write is not
1147 static void dapm_seq_run(struct snd_soc_dapm_context *dapm,
1148 struct list_head *list, int event, bool power_up)
1150 struct snd_soc_dapm_widget *w, *n;
1153 int cur_subseq = -1;
1154 int cur_reg = SND_SOC_NOPM;
1155 struct snd_soc_dapm_context *cur_dapm = NULL;
1162 sort = dapm_down_seq;
1164 list_for_each_entry_safe(w, n, list, power_list) {
1167 /* Do we need to apply any queued changes? */
1168 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
1169 w->dapm != cur_dapm || w->subseq != cur_subseq) {
1170 if (!list_empty(&pending))
1171 dapm_seq_run_coalesced(cur_dapm, &pending);
1173 if (cur_dapm && cur_dapm->seq_notifier) {
1174 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1175 if (sort[i] == cur_sort)
1176 cur_dapm->seq_notifier(cur_dapm,
1181 INIT_LIST_HEAD(&pending);
1183 cur_subseq = INT_MIN;
1184 cur_reg = SND_SOC_NOPM;
1189 case snd_soc_dapm_pre:
1191 list_for_each_entry_safe_continue(w, n, list,
1194 if (event == SND_SOC_DAPM_STREAM_START)
1196 NULL, SND_SOC_DAPM_PRE_PMU);
1197 else if (event == SND_SOC_DAPM_STREAM_STOP)
1199 NULL, SND_SOC_DAPM_PRE_PMD);
1202 case snd_soc_dapm_post:
1204 list_for_each_entry_safe_continue(w, n, list,
1207 if (event == SND_SOC_DAPM_STREAM_START)
1209 NULL, SND_SOC_DAPM_POST_PMU);
1210 else if (event == SND_SOC_DAPM_STREAM_STOP)
1212 NULL, SND_SOC_DAPM_POST_PMD);
1216 /* Queue it up for application */
1217 cur_sort = sort[w->id];
1218 cur_subseq = w->subseq;
1221 list_move(&w->power_list, &pending);
1226 dev_err(w->dapm->dev,
1227 "Failed to apply widget power: %d\n", ret);
1230 if (!list_empty(&pending))
1231 dapm_seq_run_coalesced(cur_dapm, &pending);
1233 if (cur_dapm && cur_dapm->seq_notifier) {
1234 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1235 if (sort[i] == cur_sort)
1236 cur_dapm->seq_notifier(cur_dapm,
1241 static void dapm_widget_update(struct snd_soc_dapm_context *dapm)
1243 struct snd_soc_dapm_update *update = dapm->update;
1244 struct snd_soc_dapm_widget *w;
1253 (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
1254 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
1256 pr_err("%s DAPM pre-event failed: %d\n",
1260 ret = soc_widget_update_bits_locked(w, update->reg, update->mask,
1263 pr_err("%s DAPM update failed: %d\n", w->name, ret);
1266 (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1267 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1269 pr_err("%s DAPM post-event failed: %d\n",
1274 /* Async callback run prior to DAPM sequences - brings to _PREPARE if
1275 * they're changing state.
1277 static void dapm_pre_sequence_async(void *data, async_cookie_t cookie)
1279 struct snd_soc_dapm_context *d = data;
1282 /* If we're off and we're not supposed to be go into STANDBY */
1283 if (d->bias_level == SND_SOC_BIAS_OFF &&
1284 d->target_bias_level != SND_SOC_BIAS_OFF) {
1286 pm_runtime_get_sync(d->dev);
1288 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1291 "Failed to turn on bias: %d\n", ret);
1294 /* Prepare for a STADDBY->ON or ON->STANDBY transition */
1295 if (d->bias_level != d->target_bias_level) {
1296 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);
1299 "Failed to prepare bias: %d\n", ret);
1303 /* Async callback run prior to DAPM sequences - brings to their final
1306 static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
1308 struct snd_soc_dapm_context *d = data;
1311 /* If we just powered the last thing off drop to standby bias */
1312 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1313 (d->target_bias_level == SND_SOC_BIAS_STANDBY ||
1314 d->target_bias_level == SND_SOC_BIAS_OFF)) {
1315 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1317 dev_err(d->dev, "Failed to apply standby bias: %d\n",
1321 /* If we're in standby and can support bias off then do that */
1322 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1323 d->target_bias_level == SND_SOC_BIAS_OFF) {
1324 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);
1326 dev_err(d->dev, "Failed to turn off bias: %d\n", ret);
1329 pm_runtime_put(d->dev);
1332 /* If we just powered up then move to active bias */
1333 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1334 d->target_bias_level == SND_SOC_BIAS_ON) {
1335 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);
1337 dev_err(d->dev, "Failed to apply active bias: %d\n",
1342 static void dapm_widget_set_peer_power(struct snd_soc_dapm_widget *peer,
1343 bool power, bool connect)
1345 /* If a connection is being made or broken then that update
1346 * will have marked the peer dirty, otherwise the widgets are
1347 * not connected and this update has no impact. */
1351 /* If the peer is already in the state we're moving to then we
1352 * won't have an impact on it. */
1353 if (power != peer->power)
1354 dapm_mark_dirty(peer, "peer state change");
1357 static void dapm_widget_set_power(struct snd_soc_dapm_widget *w, bool power,
1358 struct list_head *up_list,
1359 struct list_head *down_list)
1361 struct snd_soc_dapm_path *path;
1363 if (w->power == power)
1366 trace_snd_soc_dapm_widget_power(w, power);
1368 /* If we changed our power state perhaps our neigbours changed
1371 list_for_each_entry(path, &w->sources, list_sink) {
1373 dapm_widget_set_peer_power(path->source, power,
1378 case snd_soc_dapm_supply:
1379 case snd_soc_dapm_regulator_supply:
1380 /* Supplies can't affect their outputs, only their inputs */
1383 list_for_each_entry(path, &w->sinks, list_source) {
1385 dapm_widget_set_peer_power(path->sink, power,
1393 dapm_seq_insert(w, up_list, true);
1395 dapm_seq_insert(w, down_list, false);
1400 static void dapm_power_one_widget(struct snd_soc_dapm_widget *w,
1401 struct list_head *up_list,
1402 struct list_head *down_list)
1407 case snd_soc_dapm_pre:
1408 dapm_seq_insert(w, down_list, false);
1410 case snd_soc_dapm_post:
1411 dapm_seq_insert(w, up_list, true);
1415 power = dapm_widget_power_check(w);
1417 dapm_widget_set_power(w, power, up_list, down_list);
1423 * Scan each dapm widget for complete audio path.
1424 * A complete path is a route that has valid endpoints i.e.:-
1426 * o DAC to output pin.
1427 * o Input Pin to ADC.
1428 * o Input pin to Output pin (bypass, sidetone)
1429 * o DAC to ADC (loopback).
1431 static int dapm_power_widgets(struct snd_soc_dapm_context *dapm, int event)
1433 struct snd_soc_card *card = dapm->card;
1434 struct snd_soc_dapm_widget *w;
1435 struct snd_soc_dapm_context *d;
1437 LIST_HEAD(down_list);
1438 LIST_HEAD(async_domain);
1439 enum snd_soc_bias_level bias;
1441 trace_snd_soc_dapm_start(card);
1443 list_for_each_entry(d, &card->dapm_list, list) {
1444 if (d->idle_bias_off)
1445 d->target_bias_level = SND_SOC_BIAS_OFF;
1447 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1452 /* Check which widgets we need to power and store them in
1453 * lists indicating if they should be powered up or down. We
1454 * only check widgets that have been flagged as dirty but note
1455 * that new widgets may be added to the dirty list while we
1458 list_for_each_entry(w, &card->dapm_dirty, dirty) {
1459 dapm_power_one_widget(w, &up_list, &down_list);
1462 list_for_each_entry(w, &card->widgets, list) {
1463 list_del_init(&w->dirty);
1468 /* Supplies and micbiases only bring the
1469 * context up to STANDBY as unless something
1470 * else is active and passing audio they
1471 * generally don't require full power. Signal
1472 * generators are virtual pins and have no
1473 * power impact themselves.
1476 case snd_soc_dapm_siggen:
1478 case snd_soc_dapm_supply:
1479 case snd_soc_dapm_regulator_supply:
1480 case snd_soc_dapm_micbias:
1481 if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
1482 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1485 d->target_bias_level = SND_SOC_BIAS_ON;
1492 /* Force all contexts in the card to the same bias state if
1493 * they're not ground referenced.
1495 bias = SND_SOC_BIAS_OFF;
1496 list_for_each_entry(d, &card->dapm_list, list)
1497 if (d->target_bias_level > bias)
1498 bias = d->target_bias_level;
1499 list_for_each_entry(d, &card->dapm_list, list)
1500 if (!d->idle_bias_off)
1501 d->target_bias_level = bias;
1503 trace_snd_soc_dapm_walk_done(card);
1505 /* Run all the bias changes in parallel */
1506 list_for_each_entry(d, &dapm->card->dapm_list, list)
1507 async_schedule_domain(dapm_pre_sequence_async, d,
1509 async_synchronize_full_domain(&async_domain);
1511 /* Power down widgets first; try to avoid amplifying pops. */
1512 dapm_seq_run(dapm, &down_list, event, false);
1514 dapm_widget_update(dapm);
1517 dapm_seq_run(dapm, &up_list, event, true);
1519 /* Run all the bias changes in parallel */
1520 list_for_each_entry(d, &dapm->card->dapm_list, list)
1521 async_schedule_domain(dapm_post_sequence_async, d,
1523 async_synchronize_full_domain(&async_domain);
1525 /* do we need to notify any clients that DAPM event is complete */
1526 list_for_each_entry(d, &card->dapm_list, list) {
1527 if (d->stream_event)
1528 d->stream_event(d, event);
1531 pop_dbg(dapm->dev, card->pop_time,
1532 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
1533 pop_wait(card->pop_time);
1535 trace_snd_soc_dapm_done(card);
1540 #ifdef CONFIG_DEBUG_FS
1541 static ssize_t dapm_widget_power_read_file(struct file *file,
1542 char __user *user_buf,
1543 size_t count, loff_t *ppos)
1545 struct snd_soc_dapm_widget *w = file->private_data;
1549 struct snd_soc_dapm_path *p = NULL;
1551 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1555 in = is_connected_input_ep(w);
1556 dapm_clear_walk(w->dapm);
1557 out = is_connected_output_ep(w);
1558 dapm_clear_walk(w->dapm);
1560 ret = snprintf(buf, PAGE_SIZE, "%s: %s%s in %d out %d",
1561 w->name, w->power ? "On" : "Off",
1562 w->force ? " (forced)" : "", in, out);
1565 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1566 " - R%d(0x%x) bit %d",
1567 w->reg, w->reg, w->shift);
1569 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1572 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1574 w->active ? "active" : "inactive");
1576 list_for_each_entry(p, &w->sources, list_sink) {
1577 if (p->connected && !p->connected(w, p->sink))
1581 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1582 " in \"%s\" \"%s\"\n",
1583 p->name ? p->name : "static",
1586 list_for_each_entry(p, &w->sinks, list_source) {
1587 if (p->connected && !p->connected(w, p->sink))
1591 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1592 " out \"%s\" \"%s\"\n",
1593 p->name ? p->name : "static",
1597 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1603 static const struct file_operations dapm_widget_power_fops = {
1604 .open = simple_open,
1605 .read = dapm_widget_power_read_file,
1606 .llseek = default_llseek,
1609 static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
1610 size_t count, loff_t *ppos)
1612 struct snd_soc_dapm_context *dapm = file->private_data;
1615 switch (dapm->bias_level) {
1616 case SND_SOC_BIAS_ON:
1619 case SND_SOC_BIAS_PREPARE:
1620 level = "Prepare\n";
1622 case SND_SOC_BIAS_STANDBY:
1623 level = "Standby\n";
1625 case SND_SOC_BIAS_OFF:
1630 level = "Unknown\n";
1634 return simple_read_from_buffer(user_buf, count, ppos, level,
1638 static const struct file_operations dapm_bias_fops = {
1639 .open = simple_open,
1640 .read = dapm_bias_read_file,
1641 .llseek = default_llseek,
1644 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1645 struct dentry *parent)
1649 dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
1651 if (!dapm->debugfs_dapm) {
1653 "Failed to create DAPM debugfs directory\n");
1657 d = debugfs_create_file("bias_level", 0444,
1658 dapm->debugfs_dapm, dapm,
1662 "ASoC: Failed to create bias level debugfs file\n");
1665 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1667 struct snd_soc_dapm_context *dapm = w->dapm;
1670 if (!dapm->debugfs_dapm || !w->name)
1673 d = debugfs_create_file(w->name, 0444,
1674 dapm->debugfs_dapm, w,
1675 &dapm_widget_power_fops);
1677 dev_warn(w->dapm->dev,
1678 "ASoC: Failed to create %s debugfs file\n",
1682 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1684 debugfs_remove_recursive(dapm->debugfs_dapm);
1688 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1689 struct dentry *parent)
1693 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1697 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1703 /* test and update the power status of a mux widget */
1704 static int soc_dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1705 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e)
1707 struct snd_soc_dapm_path *path;
1710 if (widget->id != snd_soc_dapm_mux &&
1711 widget->id != snd_soc_dapm_virt_mux &&
1712 widget->id != snd_soc_dapm_value_mux)
1715 /* find dapm widget path assoc with kcontrol */
1716 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1717 if (path->kcontrol != kcontrol)
1720 if (!path->name || !e->texts[mux])
1724 /* we now need to match the string in the enum to the path */
1725 if (!(strcmp(path->name, e->texts[mux]))) {
1726 path->connect = 1; /* new connection */
1727 dapm_mark_dirty(path->source, "mux connection");
1730 dapm_mark_dirty(path->source,
1731 "mux disconnection");
1732 path->connect = 0; /* old connection must be powered down */
1737 dapm_mark_dirty(widget, "mux change");
1738 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1744 int snd_soc_dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1745 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e)
1747 struct snd_soc_card *card = widget->dapm->card;
1750 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
1751 ret = soc_dapm_mux_update_power(widget, kcontrol, mux, e);
1752 mutex_unlock(&card->dapm_mutex);
1755 EXPORT_SYMBOL_GPL(snd_soc_dapm_mux_update_power);
1757 /* test and update the power status of a mixer or switch widget */
1758 static int soc_dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1759 struct snd_kcontrol *kcontrol, int connect)
1761 struct snd_soc_dapm_path *path;
1764 if (widget->id != snd_soc_dapm_mixer &&
1765 widget->id != snd_soc_dapm_mixer_named_ctl &&
1766 widget->id != snd_soc_dapm_switch)
1769 /* find dapm widget path assoc with kcontrol */
1770 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1771 if (path->kcontrol != kcontrol)
1774 /* found, now check type */
1776 path->connect = connect;
1777 dapm_mark_dirty(path->source, "mixer connection");
1781 dapm_mark_dirty(widget, "mixer update");
1782 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1788 int snd_soc_dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1789 struct snd_kcontrol *kcontrol, int connect)
1791 struct snd_soc_card *card = widget->dapm->card;
1794 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
1795 ret = soc_dapm_mixer_update_power(widget, kcontrol, connect);
1796 mutex_unlock(&card->dapm_mutex);
1799 EXPORT_SYMBOL_GPL(snd_soc_dapm_mixer_update_power);
1801 /* show dapm widget status in sys fs */
1802 static ssize_t dapm_widget_show(struct device *dev,
1803 struct device_attribute *attr, char *buf)
1805 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
1806 struct snd_soc_codec *codec =rtd->codec;
1807 struct snd_soc_dapm_widget *w;
1809 char *state = "not set";
1811 list_for_each_entry(w, &codec->card->widgets, list) {
1812 if (w->dapm != &codec->dapm)
1815 /* only display widgets that burnm power */
1817 case snd_soc_dapm_hp:
1818 case snd_soc_dapm_mic:
1819 case snd_soc_dapm_spk:
1820 case snd_soc_dapm_line:
1821 case snd_soc_dapm_micbias:
1822 case snd_soc_dapm_dac:
1823 case snd_soc_dapm_adc:
1824 case snd_soc_dapm_pga:
1825 case snd_soc_dapm_out_drv:
1826 case snd_soc_dapm_mixer:
1827 case snd_soc_dapm_mixer_named_ctl:
1828 case snd_soc_dapm_supply:
1829 case snd_soc_dapm_regulator_supply:
1831 count += sprintf(buf + count, "%s: %s\n",
1832 w->name, w->power ? "On":"Off");
1839 switch (codec->dapm.bias_level) {
1840 case SND_SOC_BIAS_ON:
1843 case SND_SOC_BIAS_PREPARE:
1846 case SND_SOC_BIAS_STANDBY:
1849 case SND_SOC_BIAS_OFF:
1853 count += sprintf(buf + count, "PM State: %s\n", state);
1858 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
1860 int snd_soc_dapm_sys_add(struct device *dev)
1862 return device_create_file(dev, &dev_attr_dapm_widget);
1865 static void snd_soc_dapm_sys_remove(struct device *dev)
1867 device_remove_file(dev, &dev_attr_dapm_widget);
1870 /* free all dapm widgets and resources */
1871 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
1873 struct snd_soc_dapm_widget *w, *next_w;
1874 struct snd_soc_dapm_path *p, *next_p;
1876 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
1877 if (w->dapm != dapm)
1881 * remove source and sink paths associated to this widget.
1882 * While removing the path, remove reference to it from both
1883 * source and sink widgets so that path is removed only once.
1885 list_for_each_entry_safe(p, next_p, &w->sources, list_sink) {
1886 list_del(&p->list_sink);
1887 list_del(&p->list_source);
1889 kfree(p->long_name);
1892 list_for_each_entry_safe(p, next_p, &w->sinks, list_source) {
1893 list_del(&p->list_sink);
1894 list_del(&p->list_source);
1896 kfree(p->long_name);
1899 kfree(w->kcontrols);
1905 static struct snd_soc_dapm_widget *dapm_find_widget(
1906 struct snd_soc_dapm_context *dapm, const char *pin,
1907 bool search_other_contexts)
1909 struct snd_soc_dapm_widget *w;
1910 struct snd_soc_dapm_widget *fallback = NULL;
1912 list_for_each_entry(w, &dapm->card->widgets, list) {
1913 if (!strcmp(w->name, pin)) {
1914 if (w->dapm == dapm)
1921 if (search_other_contexts)
1927 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
1928 const char *pin, int status)
1930 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
1933 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
1937 if (w->connected != status)
1938 dapm_mark_dirty(w, "pin configuration");
1940 w->connected = status;
1948 * snd_soc_dapm_sync - scan and power dapm paths
1949 * @dapm: DAPM context
1951 * Walks all dapm audio paths and powers widgets according to their
1952 * stream or path usage.
1954 * Returns 0 for success.
1956 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
1961 * Suppress early reports (eg, jacks syncing their state) to avoid
1962 * silly DAPM runs during card startup.
1964 if (!dapm->card || !dapm->card->instantiated)
1967 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
1968 ret = dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
1969 mutex_unlock(&dapm->card->dapm_mutex);
1972 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
1974 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
1975 const struct snd_soc_dapm_route *route)
1977 struct snd_soc_dapm_path *path;
1978 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
1979 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
1981 const char *control = route->control;
1983 char prefixed_sink[80];
1984 char prefixed_source[80];
1987 if (dapm->codec && dapm->codec->name_prefix) {
1988 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
1989 dapm->codec->name_prefix, route->sink);
1990 sink = prefixed_sink;
1991 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
1992 dapm->codec->name_prefix, route->source);
1993 source = prefixed_source;
1996 source = route->source;
2000 * find src and dest widgets over all widgets but favor a widget from
2001 * current DAPM context
2003 list_for_each_entry(w, &dapm->card->widgets, list) {
2004 if (!wsink && !(strcmp(w->name, sink))) {
2006 if (w->dapm == dapm)
2010 if (!wsource && !(strcmp(w->name, source))) {
2012 if (w->dapm == dapm)
2016 /* use widget from another DAPM context if not found from this */
2022 if (wsource == NULL || wsink == NULL)
2025 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
2029 path->source = wsource;
2031 path->connected = route->connected;
2032 INIT_LIST_HEAD(&path->list);
2033 INIT_LIST_HEAD(&path->list_source);
2034 INIT_LIST_HEAD(&path->list_sink);
2036 /* check for external widgets */
2037 if (wsink->id == snd_soc_dapm_input) {
2038 if (wsource->id == snd_soc_dapm_micbias ||
2039 wsource->id == snd_soc_dapm_mic ||
2040 wsource->id == snd_soc_dapm_line ||
2041 wsource->id == snd_soc_dapm_output)
2044 if (wsource->id == snd_soc_dapm_output) {
2045 if (wsink->id == snd_soc_dapm_spk ||
2046 wsink->id == snd_soc_dapm_hp ||
2047 wsink->id == snd_soc_dapm_line ||
2048 wsink->id == snd_soc_dapm_input)
2052 /* connect static paths */
2053 if (control == NULL) {
2054 list_add(&path->list, &dapm->card->paths);
2055 list_add(&path->list_sink, &wsink->sources);
2056 list_add(&path->list_source, &wsource->sinks);
2061 /* connect dynamic paths */
2062 switch (wsink->id) {
2063 case snd_soc_dapm_adc:
2064 case snd_soc_dapm_dac:
2065 case snd_soc_dapm_pga:
2066 case snd_soc_dapm_out_drv:
2067 case snd_soc_dapm_input:
2068 case snd_soc_dapm_output:
2069 case snd_soc_dapm_siggen:
2070 case snd_soc_dapm_micbias:
2071 case snd_soc_dapm_vmid:
2072 case snd_soc_dapm_pre:
2073 case snd_soc_dapm_post:
2074 case snd_soc_dapm_supply:
2075 case snd_soc_dapm_regulator_supply:
2076 case snd_soc_dapm_aif_in:
2077 case snd_soc_dapm_aif_out:
2078 case snd_soc_dapm_dai:
2079 list_add(&path->list, &dapm->card->paths);
2080 list_add(&path->list_sink, &wsink->sources);
2081 list_add(&path->list_source, &wsource->sinks);
2084 case snd_soc_dapm_mux:
2085 case snd_soc_dapm_virt_mux:
2086 case snd_soc_dapm_value_mux:
2087 ret = dapm_connect_mux(dapm, wsource, wsink, path, control,
2088 &wsink->kcontrol_news[0]);
2092 case snd_soc_dapm_switch:
2093 case snd_soc_dapm_mixer:
2094 case snd_soc_dapm_mixer_named_ctl:
2095 ret = dapm_connect_mixer(dapm, wsource, wsink, path, control);
2099 case snd_soc_dapm_hp:
2100 case snd_soc_dapm_mic:
2101 case snd_soc_dapm_line:
2102 case snd_soc_dapm_spk:
2103 list_add(&path->list, &dapm->card->paths);
2104 list_add(&path->list_sink, &wsink->sources);
2105 list_add(&path->list_source, &wsource->sinks);
2112 dev_warn(dapm->dev, "asoc: no dapm match for %s --> %s --> %s\n",
2113 source, control, sink);
2119 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
2120 * @dapm: DAPM context
2121 * @route: audio routes
2122 * @num: number of routes
2124 * Connects 2 dapm widgets together via a named audio path. The sink is
2125 * the widget receiving the audio signal, whilst the source is the sender
2126 * of the audio signal.
2128 * Returns 0 for success else error. On error all resources can be freed
2129 * with a call to snd_soc_card_free().
2131 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
2132 const struct snd_soc_dapm_route *route, int num)
2136 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2137 for (i = 0; i < num; i++) {
2138 ret = snd_soc_dapm_add_route(dapm, route);
2140 dev_err(dapm->dev, "Failed to add route %s->%s\n",
2141 route->source, route->sink);
2146 mutex_unlock(&dapm->card->dapm_mutex);
2150 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
2152 static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm,
2153 const struct snd_soc_dapm_route *route)
2155 struct snd_soc_dapm_widget *source = dapm_find_widget(dapm,
2158 struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm,
2161 struct snd_soc_dapm_path *path;
2165 dev_err(dapm->dev, "Unable to find source %s for weak route\n",
2171 dev_err(dapm->dev, "Unable to find sink %s for weak route\n",
2176 if (route->control || route->connected)
2177 dev_warn(dapm->dev, "Ignoring control for weak route %s->%s\n",
2178 route->source, route->sink);
2180 list_for_each_entry(path, &source->sinks, list_source) {
2181 if (path->sink == sink) {
2188 dev_err(dapm->dev, "No path found for weak route %s->%s\n",
2189 route->source, route->sink);
2191 dev_warn(dapm->dev, "%d paths found for weak route %s->%s\n",
2192 count, route->source, route->sink);
2198 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
2199 * @dapm: DAPM context
2200 * @route: audio routes
2201 * @num: number of routes
2203 * Mark existing routes matching those specified in the passed array
2204 * as being weak, meaning that they are ignored for the purpose of
2205 * power decisions. The main intended use case is for sidetone paths
2206 * which couple audio between other independent paths if they are both
2207 * active in order to make the combination work better at the user
2208 * level but which aren't intended to be "used".
2210 * Note that CODEC drivers should not use this as sidetone type paths
2211 * can frequently also be used as bypass paths.
2213 int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm,
2214 const struct snd_soc_dapm_route *route, int num)
2219 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2220 for (i = 0; i < num; i++) {
2221 err = snd_soc_dapm_weak_route(dapm, route);
2226 mutex_unlock(&dapm->card->dapm_mutex);
2230 EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes);
2233 * snd_soc_dapm_new_widgets - add new dapm widgets
2234 * @dapm: DAPM context
2236 * Checks the codec for any new dapm widgets and creates them if found.
2238 * Returns 0 for success.
2240 int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context *dapm)
2242 struct snd_soc_dapm_widget *w;
2245 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2247 list_for_each_entry(w, &dapm->card->widgets, list)
2252 if (w->num_kcontrols) {
2253 w->kcontrols = kzalloc(w->num_kcontrols *
2254 sizeof(struct snd_kcontrol *),
2256 if (!w->kcontrols) {
2257 mutex_unlock(&dapm->card->dapm_mutex);
2263 case snd_soc_dapm_switch:
2264 case snd_soc_dapm_mixer:
2265 case snd_soc_dapm_mixer_named_ctl:
2268 case snd_soc_dapm_mux:
2269 case snd_soc_dapm_virt_mux:
2270 case snd_soc_dapm_value_mux:
2273 case snd_soc_dapm_pga:
2274 case snd_soc_dapm_out_drv:
2281 /* Read the initial power state from the device */
2283 val = soc_widget_read(w, w->reg);
2284 val &= 1 << w->shift;
2294 dapm_mark_dirty(w, "new widget");
2295 dapm_debugfs_add_widget(w);
2298 dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
2299 mutex_unlock(&dapm->card->dapm_mutex);
2302 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
2305 * snd_soc_dapm_get_volsw - dapm mixer get callback
2306 * @kcontrol: mixer control
2307 * @ucontrol: control element information
2309 * Callback to get the value of a dapm mixer control.
2311 * Returns 0 for success.
2313 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
2314 struct snd_ctl_elem_value *ucontrol)
2316 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2317 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2318 struct soc_mixer_control *mc =
2319 (struct soc_mixer_control *)kcontrol->private_value;
2320 unsigned int reg = mc->reg;
2321 unsigned int shift = mc->shift;
2322 unsigned int rshift = mc->rshift;
2324 unsigned int invert = mc->invert;
2325 unsigned int mask = (1 << fls(max)) - 1;
2327 ucontrol->value.integer.value[0] =
2328 (snd_soc_read(widget->codec, reg) >> shift) & mask;
2329 if (shift != rshift)
2330 ucontrol->value.integer.value[1] =
2331 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
2333 ucontrol->value.integer.value[0] =
2334 max - ucontrol->value.integer.value[0];
2335 if (shift != rshift)
2336 ucontrol->value.integer.value[1] =
2337 max - ucontrol->value.integer.value[1];
2342 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
2345 * snd_soc_dapm_put_volsw - dapm mixer set callback
2346 * @kcontrol: mixer control
2347 * @ucontrol: control element information
2349 * Callback to set the value of a dapm mixer control.
2351 * Returns 0 for success.
2353 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
2354 struct snd_ctl_elem_value *ucontrol)
2356 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2357 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2358 struct snd_soc_codec *codec = widget->codec;
2359 struct snd_soc_card *card = codec->card;
2360 struct soc_mixer_control *mc =
2361 (struct soc_mixer_control *)kcontrol->private_value;
2362 unsigned int reg = mc->reg;
2363 unsigned int shift = mc->shift;
2365 unsigned int mask = (1 << fls(max)) - 1;
2366 unsigned int invert = mc->invert;
2368 int connect, change;
2369 struct snd_soc_dapm_update update;
2372 val = (ucontrol->value.integer.value[0] & mask);
2376 mask = mask << shift;
2380 /* new connection */
2381 connect = invert ? 0 : 1;
2383 /* old connection must be powered down */
2384 connect = invert ? 1 : 0;
2386 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2388 change = snd_soc_test_bits(widget->codec, reg, mask, val);
2390 for (wi = 0; wi < wlist->num_widgets; wi++) {
2391 widget = wlist->widgets[wi];
2393 widget->value = val;
2395 update.kcontrol = kcontrol;
2396 update.widget = widget;
2400 widget->dapm->update = &update;
2402 soc_dapm_mixer_update_power(widget, kcontrol, connect);
2404 widget->dapm->update = NULL;
2408 mutex_unlock(&card->dapm_mutex);
2411 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
2414 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
2415 * @kcontrol: mixer control
2416 * @ucontrol: control element information
2418 * Callback to get the value of a dapm enumerated double mixer control.
2420 * Returns 0 for success.
2422 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
2423 struct snd_ctl_elem_value *ucontrol)
2425 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2426 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2427 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2428 unsigned int val, bitmask;
2430 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2432 val = snd_soc_read(widget->codec, e->reg);
2433 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
2434 if (e->shift_l != e->shift_r)
2435 ucontrol->value.enumerated.item[1] =
2436 (val >> e->shift_r) & (bitmask - 1);
2440 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
2443 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
2444 * @kcontrol: mixer control
2445 * @ucontrol: control element information
2447 * Callback to set the value of a dapm enumerated double mixer control.
2449 * Returns 0 for success.
2451 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
2452 struct snd_ctl_elem_value *ucontrol)
2454 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2455 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2456 struct snd_soc_codec *codec = widget->codec;
2457 struct snd_soc_card *card = codec->card;
2458 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2459 unsigned int val, mux, change;
2460 unsigned int mask, bitmask;
2461 struct snd_soc_dapm_update update;
2464 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2466 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2468 mux = ucontrol->value.enumerated.item[0];
2469 val = mux << e->shift_l;
2470 mask = (bitmask - 1) << e->shift_l;
2471 if (e->shift_l != e->shift_r) {
2472 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2474 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2475 mask |= (bitmask - 1) << e->shift_r;
2478 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2480 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2482 for (wi = 0; wi < wlist->num_widgets; wi++) {
2483 widget = wlist->widgets[wi];
2485 widget->value = val;
2487 update.kcontrol = kcontrol;
2488 update.widget = widget;
2489 update.reg = e->reg;
2492 widget->dapm->update = &update;
2494 soc_dapm_mux_update_power(widget, kcontrol, mux, e);
2496 widget->dapm->update = NULL;
2500 mutex_unlock(&card->dapm_mutex);
2503 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
2506 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
2507 * @kcontrol: mixer control
2508 * @ucontrol: control element information
2510 * Returns 0 for success.
2512 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
2513 struct snd_ctl_elem_value *ucontrol)
2515 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2516 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2518 ucontrol->value.enumerated.item[0] = widget->value;
2522 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt);
2525 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
2526 * @kcontrol: mixer control
2527 * @ucontrol: control element information
2529 * Returns 0 for success.
2531 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
2532 struct snd_ctl_elem_value *ucontrol)
2534 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2535 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2536 struct snd_soc_codec *codec = widget->codec;
2537 struct snd_soc_card *card = codec->card;
2538 struct soc_enum *e =
2539 (struct soc_enum *)kcontrol->private_value;
2544 if (ucontrol->value.enumerated.item[0] >= e->max)
2547 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2549 change = widget->value != ucontrol->value.enumerated.item[0];
2551 for (wi = 0; wi < wlist->num_widgets; wi++) {
2552 widget = wlist->widgets[wi];
2554 widget->value = ucontrol->value.enumerated.item[0];
2556 soc_dapm_mux_update_power(widget, kcontrol, widget->value, e);
2560 mutex_unlock(&card->dapm_mutex);
2563 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt);
2566 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
2568 * @kcontrol: mixer control
2569 * @ucontrol: control element information
2571 * Callback to get the value of a dapm semi enumerated double mixer control.
2573 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2574 * used for handling bitfield coded enumeration for example.
2576 * Returns 0 for success.
2578 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
2579 struct snd_ctl_elem_value *ucontrol)
2581 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2582 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2583 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2584 unsigned int reg_val, val, mux;
2586 reg_val = snd_soc_read(widget->codec, e->reg);
2587 val = (reg_val >> e->shift_l) & e->mask;
2588 for (mux = 0; mux < e->max; mux++) {
2589 if (val == e->values[mux])
2592 ucontrol->value.enumerated.item[0] = mux;
2593 if (e->shift_l != e->shift_r) {
2594 val = (reg_val >> e->shift_r) & e->mask;
2595 for (mux = 0; mux < e->max; mux++) {
2596 if (val == e->values[mux])
2599 ucontrol->value.enumerated.item[1] = mux;
2604 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
2607 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
2609 * @kcontrol: mixer control
2610 * @ucontrol: control element information
2612 * Callback to set the value of a dapm semi enumerated double mixer control.
2614 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2615 * used for handling bitfield coded enumeration for example.
2617 * Returns 0 for success.
2619 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
2620 struct snd_ctl_elem_value *ucontrol)
2622 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2623 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2624 struct snd_soc_codec *codec = widget->codec;
2625 struct snd_soc_card *card = codec->card;
2626 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2627 unsigned int val, mux, change;
2629 struct snd_soc_dapm_update update;
2632 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2634 mux = ucontrol->value.enumerated.item[0];
2635 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2636 mask = e->mask << e->shift_l;
2637 if (e->shift_l != e->shift_r) {
2638 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2640 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2641 mask |= e->mask << e->shift_r;
2644 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2646 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2648 for (wi = 0; wi < wlist->num_widgets; wi++) {
2649 widget = wlist->widgets[wi];
2651 widget->value = val;
2653 update.kcontrol = kcontrol;
2654 update.widget = widget;
2655 update.reg = e->reg;
2658 widget->dapm->update = &update;
2660 soc_dapm_mux_update_power(widget, kcontrol, mux, e);
2662 widget->dapm->update = NULL;
2666 mutex_unlock(&card->dapm_mutex);
2669 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
2672 * snd_soc_dapm_info_pin_switch - Info for a pin switch
2674 * @kcontrol: mixer control
2675 * @uinfo: control element information
2677 * Callback to provide information about a pin switch control.
2679 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
2680 struct snd_ctl_elem_info *uinfo)
2682 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2684 uinfo->value.integer.min = 0;
2685 uinfo->value.integer.max = 1;
2689 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
2692 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
2694 * @kcontrol: mixer control
2697 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
2698 struct snd_ctl_elem_value *ucontrol)
2700 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
2701 const char *pin = (const char *)kcontrol->private_value;
2703 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2705 ucontrol->value.integer.value[0] =
2706 snd_soc_dapm_get_pin_status(&card->dapm, pin);
2708 mutex_unlock(&card->dapm_mutex);
2712 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
2715 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
2717 * @kcontrol: mixer control
2720 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
2721 struct snd_ctl_elem_value *ucontrol)
2723 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
2724 const char *pin = (const char *)kcontrol->private_value;
2726 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2728 if (ucontrol->value.integer.value[0])
2729 snd_soc_dapm_enable_pin(&card->dapm, pin);
2731 snd_soc_dapm_disable_pin(&card->dapm, pin);
2733 mutex_unlock(&card->dapm_mutex);
2735 snd_soc_dapm_sync(&card->dapm);
2738 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
2740 static struct snd_soc_dapm_widget *
2741 snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
2742 const struct snd_soc_dapm_widget *widget)
2744 struct snd_soc_dapm_widget *w;
2748 if ((w = dapm_cnew_widget(widget)) == NULL)
2752 case snd_soc_dapm_regulator_supply:
2753 w->regulator = devm_regulator_get(dapm->dev, w->name);
2754 if (IS_ERR(w->regulator)) {
2755 ret = PTR_ERR(w->regulator);
2756 dev_err(dapm->dev, "Failed to request %s: %d\n",
2765 name_len = strlen(widget->name) + 1;
2766 if (dapm->codec && dapm->codec->name_prefix)
2767 name_len += 1 + strlen(dapm->codec->name_prefix);
2768 w->name = kmalloc(name_len, GFP_KERNEL);
2769 if (w->name == NULL) {
2773 if (dapm->codec && dapm->codec->name_prefix)
2774 snprintf((char *)w->name, name_len, "%s %s",
2775 dapm->codec->name_prefix, widget->name);
2777 snprintf((char *)w->name, name_len, "%s", widget->name);
2780 case snd_soc_dapm_switch:
2781 case snd_soc_dapm_mixer:
2782 case snd_soc_dapm_mixer_named_ctl:
2783 w->power_check = dapm_generic_check_power;
2785 case snd_soc_dapm_mux:
2786 case snd_soc_dapm_virt_mux:
2787 case snd_soc_dapm_value_mux:
2788 w->power_check = dapm_generic_check_power;
2790 case snd_soc_dapm_adc:
2791 case snd_soc_dapm_aif_out:
2792 w->power_check = dapm_adc_check_power;
2794 case snd_soc_dapm_dac:
2795 case snd_soc_dapm_aif_in:
2796 w->power_check = dapm_dac_check_power;
2798 case snd_soc_dapm_pga:
2799 case snd_soc_dapm_out_drv:
2800 case snd_soc_dapm_input:
2801 case snd_soc_dapm_output:
2802 case snd_soc_dapm_micbias:
2803 case snd_soc_dapm_spk:
2804 case snd_soc_dapm_hp:
2805 case snd_soc_dapm_mic:
2806 case snd_soc_dapm_line:
2807 w->power_check = dapm_generic_check_power;
2809 case snd_soc_dapm_supply:
2810 case snd_soc_dapm_regulator_supply:
2811 w->power_check = dapm_supply_check_power;
2813 case snd_soc_dapm_dai:
2814 w->power_check = dapm_dai_check_power;
2817 w->power_check = dapm_always_on_check_power;
2823 w->codec = dapm->codec;
2824 w->platform = dapm->platform;
2825 INIT_LIST_HEAD(&w->sources);
2826 INIT_LIST_HEAD(&w->sinks);
2827 INIT_LIST_HEAD(&w->list);
2828 INIT_LIST_HEAD(&w->dirty);
2829 list_add(&w->list, &dapm->card->widgets);
2831 /* machine layer set ups unconnected pins and insertions */
2837 * snd_soc_dapm_new_controls - create new dapm controls
2838 * @dapm: DAPM context
2839 * @widget: widget array
2840 * @num: number of widgets
2842 * Creates new DAPM controls based upon the templates.
2844 * Returns 0 for success else error.
2846 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
2847 const struct snd_soc_dapm_widget *widget,
2850 struct snd_soc_dapm_widget *w;
2853 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2854 for (i = 0; i < num; i++) {
2855 w = snd_soc_dapm_new_control(dapm, widget);
2858 "ASoC: Failed to create DAPM control %s\n",
2864 mutex_unlock(&dapm->card->dapm_mutex);
2867 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
2869 int snd_soc_dapm_new_dai_widgets(struct snd_soc_dapm_context *dapm,
2870 struct snd_soc_dai *dai)
2872 struct snd_soc_dapm_widget template;
2873 struct snd_soc_dapm_widget *w;
2875 WARN_ON(dapm->dev != dai->dev);
2877 memset(&template, 0, sizeof(template));
2878 template.reg = SND_SOC_NOPM;
2880 if (dai->driver->playback.stream_name) {
2881 template.id = snd_soc_dapm_dai;
2882 template.name = dai->driver->playback.stream_name;
2883 template.sname = dai->driver->playback.stream_name;
2885 dev_dbg(dai->dev, "adding %s widget\n",
2888 w = snd_soc_dapm_new_control(dapm, &template);
2890 dev_err(dapm->dev, "Failed to create %s widget\n",
2891 dai->driver->playback.stream_name);
2895 dai->playback_widget = w;
2898 if (dai->driver->capture.stream_name) {
2899 template.id = snd_soc_dapm_dai;
2900 template.name = dai->driver->capture.stream_name;
2901 template.sname = dai->driver->capture.stream_name;
2903 dev_dbg(dai->dev, "adding %s widget\n",
2906 w = snd_soc_dapm_new_control(dapm, &template);
2908 dev_err(dapm->dev, "Failed to create %s widget\n",
2909 dai->driver->capture.stream_name);
2913 dai->capture_widget = w;
2919 int snd_soc_dapm_link_dai_widgets(struct snd_soc_card *card)
2921 struct snd_soc_dapm_widget *dai_w, *w;
2922 struct snd_soc_dai *dai;
2923 struct snd_soc_dapm_route r;
2925 memset(&r, 0, sizeof(r));
2927 /* For each DAI widget... */
2928 list_for_each_entry(dai_w, &card->widgets, list) {
2929 if (dai_w->id != snd_soc_dapm_dai)
2934 /* ...find all widgets with the same stream and link them */
2935 list_for_each_entry(w, &card->widgets, list) {
2936 if (w->dapm != dai_w->dapm)
2939 if (w->id == snd_soc_dapm_dai)
2945 if (dai->driver->playback.stream_name &&
2947 dai->driver->playback.stream_name)) {
2948 r.source = dai->playback_widget->name;
2950 dev_dbg(dai->dev, "%s -> %s\n",
2953 snd_soc_dapm_add_route(w->dapm, &r);
2956 if (dai->driver->capture.stream_name &&
2958 dai->driver->capture.stream_name)) {
2960 r.sink = dai->capture_widget->name;
2961 dev_dbg(dai->dev, "%s -> %s\n",
2964 snd_soc_dapm_add_route(w->dapm, &r);
2972 static void soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
2976 struct snd_soc_dapm_widget *w_cpu, *w_codec;
2977 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2978 struct snd_soc_dai *codec_dai = rtd->codec_dai;
2980 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2981 w_cpu = cpu_dai->playback_widget;
2982 w_codec = codec_dai->playback_widget;
2984 w_cpu = cpu_dai->capture_widget;
2985 w_codec = codec_dai->capture_widget;
2990 dapm_mark_dirty(w_cpu, "stream event");
2993 case SND_SOC_DAPM_STREAM_START:
2996 case SND_SOC_DAPM_STREAM_STOP:
2999 case SND_SOC_DAPM_STREAM_SUSPEND:
3000 case SND_SOC_DAPM_STREAM_RESUME:
3001 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
3002 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
3009 dapm_mark_dirty(w_codec, "stream event");
3012 case SND_SOC_DAPM_STREAM_START:
3013 w_codec->active = 1;
3015 case SND_SOC_DAPM_STREAM_STOP:
3016 w_codec->active = 0;
3018 case SND_SOC_DAPM_STREAM_SUSPEND:
3019 case SND_SOC_DAPM_STREAM_RESUME:
3020 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
3021 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
3026 dapm_power_widgets(&rtd->card->dapm, event);
3030 * snd_soc_dapm_stream_event - send a stream event to the dapm core
3031 * @rtd: PCM runtime data
3032 * @stream: stream name
3033 * @event: stream event
3035 * Sends a stream event to the dapm core. The core then makes any
3036 * necessary widget power changes.
3038 * Returns 0 for success else error.
3040 void snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
3043 struct snd_soc_card *card = rtd->card;
3045 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3046 soc_dapm_stream_event(rtd, stream, event);
3047 mutex_unlock(&card->dapm_mutex);
3051 * snd_soc_dapm_enable_pin - enable pin.
3052 * @dapm: DAPM context
3055 * Enables input/output pin and its parents or children widgets iff there is
3056 * a valid audio route and active audio stream.
3057 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3058 * do any widget power switching.
3060 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
3062 return snd_soc_dapm_set_pin(dapm, pin, 1);
3064 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
3067 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
3068 * @dapm: DAPM context
3071 * Enables input/output pin regardless of any other state. This is
3072 * intended for use with microphone bias supplies used in microphone
3075 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3076 * do any widget power switching.
3078 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
3081 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
3084 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
3088 dev_dbg(w->dapm->dev, "dapm: force enable pin %s\n", pin);
3091 dapm_mark_dirty(w, "force enable");
3095 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
3098 * snd_soc_dapm_disable_pin - disable pin.
3099 * @dapm: DAPM context
3102 * Disables input/output pin and its parents or children widgets.
3103 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3104 * do any widget power switching.
3106 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
3109 return snd_soc_dapm_set_pin(dapm, pin, 0);
3111 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
3114 * snd_soc_dapm_nc_pin - permanently disable pin.
3115 * @dapm: DAPM context
3118 * Marks the specified pin as being not connected, disabling it along
3119 * any parent or child widgets. At present this is identical to
3120 * snd_soc_dapm_disable_pin() but in future it will be extended to do
3121 * additional things such as disabling controls which only affect
3122 * paths through the pin.
3124 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3125 * do any widget power switching.
3127 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
3129 return snd_soc_dapm_set_pin(dapm, pin, 0);
3131 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
3134 * snd_soc_dapm_get_pin_status - get audio pin status
3135 * @dapm: DAPM context
3136 * @pin: audio signal pin endpoint (or start point)
3138 * Get audio pin status - connected or disconnected.
3140 * Returns 1 for connected otherwise 0.
3142 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
3145 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
3148 return w->connected;
3152 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
3155 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
3156 * @dapm: DAPM context
3157 * @pin: audio signal pin endpoint (or start point)
3159 * Mark the given endpoint or pin as ignoring suspend. When the
3160 * system is disabled a path between two endpoints flagged as ignoring
3161 * suspend will not be disabled. The path must already be enabled via
3162 * normal means at suspend time, it will not be turned on if it was not
3165 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
3168 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
3171 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
3175 w->ignore_suspend = 1;
3179 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
3181 static bool snd_soc_dapm_widget_in_card_paths(struct snd_soc_card *card,
3182 struct snd_soc_dapm_widget *w)
3184 struct snd_soc_dapm_path *p;
3186 list_for_each_entry(p, &card->paths, list) {
3187 if ((p->source == w) || (p->sink == w)) {
3189 "... Path %s(id:%d dapm:%p) - %s(id:%d dapm:%p)\n",
3190 p->source->name, p->source->id, p->source->dapm,
3191 p->sink->name, p->sink->id, p->sink->dapm);
3193 /* Connected to something other than the codec */
3194 if (p->source->dapm != p->sink->dapm)
3197 * Loopback connection from codec external pin to
3198 * codec external pin
3200 if (p->sink->id == snd_soc_dapm_input) {
3201 switch (p->source->id) {
3202 case snd_soc_dapm_output:
3203 case snd_soc_dapm_micbias:
3216 * snd_soc_dapm_auto_nc_codec_pins - call snd_soc_dapm_nc_pin for unused pins
3217 * @codec: The codec whose pins should be processed
3219 * Automatically call snd_soc_dapm_nc_pin() for any external pins in the codec
3220 * which are unused. Pins are used if they are connected externally to the
3221 * codec, whether that be to some other device, or a loop-back connection to
3224 void snd_soc_dapm_auto_nc_codec_pins(struct snd_soc_codec *codec)
3226 struct snd_soc_card *card = codec->card;
3227 struct snd_soc_dapm_context *dapm = &codec->dapm;
3228 struct snd_soc_dapm_widget *w;
3230 dev_dbg(codec->dev, "Auto NC: DAPMs: card:%p codec:%p\n",
3231 &card->dapm, &codec->dapm);
3233 list_for_each_entry(w, &card->widgets, list) {
3234 if (w->dapm != dapm)
3237 case snd_soc_dapm_input:
3238 case snd_soc_dapm_output:
3239 case snd_soc_dapm_micbias:
3240 dev_dbg(codec->dev, "Auto NC: Checking widget %s\n",
3242 if (!snd_soc_dapm_widget_in_card_paths(card, w)) {
3244 "... Not in map; disabling\n");
3245 snd_soc_dapm_nc_pin(dapm, w->name);
3255 * snd_soc_dapm_free - free dapm resources
3256 * @dapm: DAPM context
3258 * Free all dapm widgets and resources.
3260 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
3262 snd_soc_dapm_sys_remove(dapm->dev);
3263 dapm_debugfs_cleanup(dapm);
3264 dapm_free_widgets(dapm);
3265 list_del(&dapm->list);
3267 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
3269 static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context *dapm)
3271 struct snd_soc_dapm_widget *w;
3272 LIST_HEAD(down_list);
3275 list_for_each_entry(w, &dapm->card->widgets, list) {
3276 if (w->dapm != dapm)
3279 dapm_seq_insert(w, &down_list, false);
3285 /* If there were no widgets to power down we're already in
3289 if (dapm->bias_level == SND_SOC_BIAS_ON)
3290 snd_soc_dapm_set_bias_level(dapm,
3291 SND_SOC_BIAS_PREPARE);
3292 dapm_seq_run(dapm, &down_list, 0, false);
3293 if (dapm->bias_level == SND_SOC_BIAS_PREPARE)
3294 snd_soc_dapm_set_bias_level(dapm,
3295 SND_SOC_BIAS_STANDBY);
3300 * snd_soc_dapm_shutdown - callback for system shutdown
3302 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
3304 struct snd_soc_codec *codec;
3306 list_for_each_entry(codec, &card->codec_dev_list, list) {
3307 soc_dapm_shutdown_codec(&codec->dapm);
3308 if (codec->dapm.bias_level == SND_SOC_BIAS_STANDBY)
3309 snd_soc_dapm_set_bias_level(&codec->dapm,
3314 /* Module information */
3315 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3316 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
3317 MODULE_LICENSE("GPL");