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_line] = 10,
71 [snd_soc_dapm_post] = 11,
74 static int dapm_down_seq[] = {
75 [snd_soc_dapm_pre] = 0,
76 [snd_soc_dapm_adc] = 1,
77 [snd_soc_dapm_hp] = 2,
78 [snd_soc_dapm_spk] = 2,
79 [snd_soc_dapm_line] = 2,
80 [snd_soc_dapm_out_drv] = 2,
81 [snd_soc_dapm_pga] = 4,
82 [snd_soc_dapm_mixer_named_ctl] = 5,
83 [snd_soc_dapm_mixer] = 5,
84 [snd_soc_dapm_dac] = 6,
85 [snd_soc_dapm_mic] = 7,
86 [snd_soc_dapm_micbias] = 8,
87 [snd_soc_dapm_mux] = 9,
88 [snd_soc_dapm_virt_mux] = 9,
89 [snd_soc_dapm_value_mux] = 9,
90 [snd_soc_dapm_aif_in] = 10,
91 [snd_soc_dapm_aif_out] = 10,
92 [snd_soc_dapm_dai] = 10,
93 [snd_soc_dapm_regulator_supply] = 11,
94 [snd_soc_dapm_supply] = 11,
95 [snd_soc_dapm_post] = 12,
98 static void pop_wait(u32 pop_time)
101 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
104 static void pop_dbg(struct device *dev, u32 pop_time, const char *fmt, ...)
112 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
117 vsnprintf(buf, PAGE_SIZE, fmt, args);
118 dev_info(dev, "%s", buf);
124 static bool dapm_dirty_widget(struct snd_soc_dapm_widget *w)
126 return !list_empty(&w->dirty);
129 void dapm_mark_dirty(struct snd_soc_dapm_widget *w, const char *reason)
131 if (!dapm_dirty_widget(w)) {
132 dev_vdbg(w->dapm->dev, "Marking %s dirty due to %s\n",
134 list_add_tail(&w->dirty, &w->dapm->card->dapm_dirty);
137 EXPORT_SYMBOL_GPL(dapm_mark_dirty);
139 /* create a new dapm widget */
140 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
141 const struct snd_soc_dapm_widget *_widget)
143 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
146 /* get snd_card from DAPM context */
147 static inline struct snd_card *dapm_get_snd_card(
148 struct snd_soc_dapm_context *dapm)
151 return dapm->codec->card->snd_card;
152 else if (dapm->platform)
153 return dapm->platform->card->snd_card;
161 /* get soc_card from DAPM context */
162 static inline struct snd_soc_card *dapm_get_soc_card(
163 struct snd_soc_dapm_context *dapm)
166 return dapm->codec->card;
167 else if (dapm->platform)
168 return dapm->platform->card;
176 static void dapm_reset(struct snd_soc_card *card)
178 struct snd_soc_dapm_widget *w;
180 memset(&card->dapm_stats, 0, sizeof(card->dapm_stats));
182 list_for_each_entry(w, &card->widgets, list) {
183 w->power_checked = false;
189 static int soc_widget_read(struct snd_soc_dapm_widget *w, int reg)
192 return snd_soc_read(w->codec, reg);
193 else if (w->platform)
194 return snd_soc_platform_read(w->platform, reg);
196 dev_err(w->dapm->dev, "no valid widget read method\n");
200 static int soc_widget_write(struct snd_soc_dapm_widget *w, int reg, int val)
203 return snd_soc_write(w->codec, reg, val);
204 else if (w->platform)
205 return snd_soc_platform_write(w->platform, reg, val);
207 dev_err(w->dapm->dev, "no valid widget write method\n");
211 static int soc_widget_update_bits(struct snd_soc_dapm_widget *w,
212 unsigned short reg, unsigned int mask, unsigned int value)
215 unsigned int old, new;
218 if (w->codec && w->codec->using_regmap) {
219 ret = regmap_update_bits_check(w->codec->control_data,
220 reg, mask, value, &change);
224 ret = soc_widget_read(w, reg);
229 new = (old & ~mask) | (value & mask);
232 ret = soc_widget_write(w, reg, new);
242 * snd_soc_dapm_set_bias_level - set the bias level for the system
243 * @dapm: DAPM context
244 * @level: level to configure
246 * Configure the bias (power) levels for the SoC audio device.
248 * Returns 0 for success else error.
250 static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm,
251 enum snd_soc_bias_level level)
253 struct snd_soc_card *card = dapm->card;
256 trace_snd_soc_bias_level_start(card, level);
258 if (card && card->set_bias_level)
259 ret = card->set_bias_level(card, dapm, level);
264 if (dapm->codec->driver->set_bias_level)
265 ret = dapm->codec->driver->set_bias_level(dapm->codec,
268 dapm->bias_level = level;
273 if (card && card->set_bias_level_post)
274 ret = card->set_bias_level_post(card, dapm, level);
276 trace_snd_soc_bias_level_done(card, level);
281 /* set up initial codec paths */
282 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
283 struct snd_soc_dapm_path *p, int i)
286 case snd_soc_dapm_switch:
287 case snd_soc_dapm_mixer:
288 case snd_soc_dapm_mixer_named_ctl: {
290 struct soc_mixer_control *mc = (struct soc_mixer_control *)
291 w->kcontrol_news[i].private_value;
292 unsigned int reg = mc->reg;
293 unsigned int shift = mc->shift;
295 unsigned int mask = (1 << fls(max)) - 1;
296 unsigned int invert = mc->invert;
298 val = soc_widget_read(w, reg);
299 val = (val >> shift) & mask;
301 if ((invert && !val) || (!invert && val))
307 case snd_soc_dapm_mux: {
308 struct soc_enum *e = (struct soc_enum *)
309 w->kcontrol_news[i].private_value;
310 int val, item, bitmask;
312 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
314 val = soc_widget_read(w, e->reg);
315 item = (val >> e->shift_l) & (bitmask - 1);
318 for (i = 0; i < e->max; i++) {
319 if (!(strcmp(p->name, e->texts[i])) && item == i)
324 case snd_soc_dapm_virt_mux: {
325 struct soc_enum *e = (struct soc_enum *)
326 w->kcontrol_news[i].private_value;
329 /* since a virtual mux has no backing registers to
330 * decide which path to connect, it will try to match
331 * with the first enumeration. This is to ensure
332 * that the default mux choice (the first) will be
333 * correctly powered up during initialization.
335 if (!strcmp(p->name, e->texts[0]))
339 case snd_soc_dapm_value_mux: {
340 struct soc_enum *e = (struct soc_enum *)
341 w->kcontrol_news[i].private_value;
344 val = soc_widget_read(w, e->reg);
345 val = (val >> e->shift_l) & e->mask;
346 for (item = 0; item < e->max; item++) {
347 if (val == e->values[item])
352 for (i = 0; i < e->max; i++) {
353 if (!(strcmp(p->name, e->texts[i])) && item == i)
358 /* does not affect routing - always connected */
359 case snd_soc_dapm_pga:
360 case snd_soc_dapm_out_drv:
361 case snd_soc_dapm_output:
362 case snd_soc_dapm_adc:
363 case snd_soc_dapm_input:
364 case snd_soc_dapm_siggen:
365 case snd_soc_dapm_dac:
366 case snd_soc_dapm_micbias:
367 case snd_soc_dapm_vmid:
368 case snd_soc_dapm_supply:
369 case snd_soc_dapm_regulator_supply:
370 case snd_soc_dapm_aif_in:
371 case snd_soc_dapm_aif_out:
372 case snd_soc_dapm_dai:
373 case snd_soc_dapm_hp:
374 case snd_soc_dapm_mic:
375 case snd_soc_dapm_spk:
376 case snd_soc_dapm_line:
379 /* does affect routing - dynamically connected */
380 case snd_soc_dapm_pre:
381 case snd_soc_dapm_post:
387 /* connect mux widget to its interconnecting audio paths */
388 static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
389 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
390 struct snd_soc_dapm_path *path, const char *control_name,
391 const struct snd_kcontrol_new *kcontrol)
393 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
396 for (i = 0; i < e->max; i++) {
397 if (!(strcmp(control_name, e->texts[i]))) {
398 list_add(&path->list, &dapm->card->paths);
399 list_add(&path->list_sink, &dest->sources);
400 list_add(&path->list_source, &src->sinks);
401 path->name = (char*)e->texts[i];
402 dapm_set_path_status(dest, path, 0);
410 /* connect mixer widget to its interconnecting audio paths */
411 static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
412 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
413 struct snd_soc_dapm_path *path, const char *control_name)
417 /* search for mixer kcontrol */
418 for (i = 0; i < dest->num_kcontrols; i++) {
419 if (!strcmp(control_name, dest->kcontrol_news[i].name)) {
420 list_add(&path->list, &dapm->card->paths);
421 list_add(&path->list_sink, &dest->sources);
422 list_add(&path->list_source, &src->sinks);
423 path->name = dest->kcontrol_news[i].name;
424 dapm_set_path_status(dest, path, i);
431 static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm,
432 struct snd_soc_dapm_widget *kcontrolw,
433 const struct snd_kcontrol_new *kcontrol_new,
434 struct snd_kcontrol **kcontrol)
436 struct snd_soc_dapm_widget *w;
441 list_for_each_entry(w, &dapm->card->widgets, list) {
442 if (w == kcontrolw || w->dapm != kcontrolw->dapm)
444 for (i = 0; i < w->num_kcontrols; i++) {
445 if (&w->kcontrol_news[i] == kcontrol_new) {
447 *kcontrol = w->kcontrols[i];
456 /* create new dapm mixer control */
457 static int dapm_new_mixer(struct snd_soc_dapm_widget *w)
459 struct snd_soc_dapm_context *dapm = w->dapm;
461 size_t name_len, prefix_len;
462 struct snd_soc_dapm_path *path;
463 struct snd_card *card = dapm->card->snd_card;
465 struct snd_soc_dapm_widget_list *wlist;
469 prefix = dapm->codec->name_prefix;
474 prefix_len = strlen(prefix) + 1;
479 for (i = 0; i < w->num_kcontrols; i++) {
482 list_for_each_entry(path, &w->sources, list_sink) {
484 /* mixer/mux paths name must match control name */
485 if (path->name != (char *)w->kcontrol_news[i].name)
488 if (w->kcontrols[i]) {
489 path->kcontrol = w->kcontrols[i];
493 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
494 sizeof(struct snd_soc_dapm_widget *),
495 wlist = kzalloc(wlistsize, GFP_KERNEL);
498 "asoc: can't allocate widget list for %s\n",
502 wlist->num_widgets = 1;
503 wlist->widgets[0] = w;
505 /* add dapm control with long name.
506 * for dapm_mixer this is the concatenation of the
507 * mixer and kcontrol name.
508 * for dapm_mixer_named_ctl this is simply the
511 name_len = strlen(w->kcontrol_news[i].name) + 1;
512 if (w->id != snd_soc_dapm_mixer_named_ctl)
513 name_len += 1 + strlen(w->name);
515 path->long_name = kmalloc(name_len, GFP_KERNEL);
517 if (path->long_name == NULL) {
524 /* The control will get a prefix from
525 * the control creation process but
526 * we're also using the same prefix
527 * for widgets so cut the prefix off
528 * the front of the widget name.
530 snprintf((char *)path->long_name, name_len,
531 "%s %s", w->name + prefix_len,
532 w->kcontrol_news[i].name);
534 case snd_soc_dapm_mixer_named_ctl:
535 snprintf((char *)path->long_name, name_len,
536 "%s", w->kcontrol_news[i].name);
540 ((char *)path->long_name)[name_len - 1] = '\0';
542 path->kcontrol = snd_soc_cnew(&w->kcontrol_news[i],
543 wlist, path->long_name,
545 ret = snd_ctl_add(card, path->kcontrol);
548 "asoc: failed to add dapm kcontrol %s: %d\n",
549 path->long_name, ret);
551 kfree(path->long_name);
552 path->long_name = NULL;
555 w->kcontrols[i] = path->kcontrol;
561 /* create new dapm mux control */
562 static int dapm_new_mux(struct snd_soc_dapm_widget *w)
564 struct snd_soc_dapm_context *dapm = w->dapm;
565 struct snd_soc_dapm_path *path = NULL;
566 struct snd_kcontrol *kcontrol;
567 struct snd_card *card = dapm->card->snd_card;
571 struct snd_soc_dapm_widget_list *wlist;
572 int shared, wlistentries;
576 if (w->num_kcontrols != 1) {
578 "asoc: mux %s has incorrect number of controls\n",
583 shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[0],
586 wlist = kcontrol->private_data;
587 wlistentries = wlist->num_widgets + 1;
592 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
593 wlistentries * sizeof(struct snd_soc_dapm_widget *),
594 wlist = krealloc(wlist, wlistsize, GFP_KERNEL);
597 "asoc: can't allocate widget list for %s\n", w->name);
600 wlist->num_widgets = wlistentries;
601 wlist->widgets[wlistentries - 1] = w;
605 prefix = dapm->codec->name_prefix;
610 name = w->kcontrol_news[0].name;
615 prefix_len = strlen(prefix) + 1;
621 * The control will get a prefix from the control creation
622 * process but we're also using the same prefix for widgets so
623 * cut the prefix off the front of the widget name.
625 kcontrol = snd_soc_cnew(&w->kcontrol_news[0], wlist,
626 name + prefix_len, prefix);
627 ret = snd_ctl_add(card, kcontrol);
629 dev_err(dapm->dev, "failed to add kcontrol %s: %d\n",
636 kcontrol->private_data = wlist;
638 w->kcontrols[0] = kcontrol;
640 list_for_each_entry(path, &w->sources, list_sink)
641 path->kcontrol = kcontrol;
646 /* create new dapm volume control */
647 static int dapm_new_pga(struct snd_soc_dapm_widget *w)
649 if (w->num_kcontrols)
650 dev_err(w->dapm->dev,
651 "asoc: PGA controls not supported: '%s'\n", w->name);
656 /* reset 'walked' bit for each dapm path */
657 static inline void dapm_clear_walk(struct snd_soc_dapm_context *dapm)
659 struct snd_soc_dapm_path *p;
661 list_for_each_entry(p, &dapm->card->paths, list)
665 /* We implement power down on suspend by checking the power state of
666 * the ALSA card - when we are suspending the ALSA state for the card
669 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
671 int level = snd_power_get_state(widget->dapm->card->snd_card);
674 case SNDRV_CTL_POWER_D3hot:
675 case SNDRV_CTL_POWER_D3cold:
676 if (widget->ignore_suspend)
677 dev_dbg(widget->dapm->dev, "%s ignoring suspend\n",
679 return widget->ignore_suspend;
686 * Recursively check for a completed path to an active or physically connected
687 * output widget. Returns number of complete paths.
689 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
691 struct snd_soc_dapm_path *path;
694 if (widget->outputs >= 0)
695 return widget->outputs;
697 DAPM_UPDATE_STAT(widget, path_checks);
699 switch (widget->id) {
700 case snd_soc_dapm_supply:
701 case snd_soc_dapm_regulator_supply:
707 switch (widget->id) {
708 case snd_soc_dapm_adc:
709 case snd_soc_dapm_aif_out:
710 case snd_soc_dapm_dai:
711 if (widget->active) {
712 widget->outputs = snd_soc_dapm_suspend_check(widget);
713 return widget->outputs;
719 if (widget->connected) {
720 /* connected pin ? */
721 if (widget->id == snd_soc_dapm_output && !widget->ext) {
722 widget->outputs = snd_soc_dapm_suspend_check(widget);
723 return widget->outputs;
726 /* connected jack or spk ? */
727 if (widget->id == snd_soc_dapm_hp ||
728 widget->id == snd_soc_dapm_spk ||
729 (widget->id == snd_soc_dapm_line &&
730 !list_empty(&widget->sources))) {
731 widget->outputs = snd_soc_dapm_suspend_check(widget);
732 return widget->outputs;
736 list_for_each_entry(path, &widget->sinks, list_source) {
737 DAPM_UPDATE_STAT(widget, neighbour_checks);
745 if (path->sink && path->connect) {
747 con += is_connected_output_ep(path->sink);
751 widget->outputs = con;
757 * Recursively check for a completed path to an active or physically connected
758 * input widget. Returns number of complete paths.
760 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
762 struct snd_soc_dapm_path *path;
765 if (widget->inputs >= 0)
766 return widget->inputs;
768 DAPM_UPDATE_STAT(widget, path_checks);
770 switch (widget->id) {
771 case snd_soc_dapm_supply:
772 case snd_soc_dapm_regulator_supply:
778 /* active stream ? */
779 switch (widget->id) {
780 case snd_soc_dapm_dac:
781 case snd_soc_dapm_aif_in:
782 case snd_soc_dapm_dai:
783 if (widget->active) {
784 widget->inputs = snd_soc_dapm_suspend_check(widget);
785 return widget->inputs;
791 if (widget->connected) {
792 /* connected pin ? */
793 if (widget->id == snd_soc_dapm_input && !widget->ext) {
794 widget->inputs = snd_soc_dapm_suspend_check(widget);
795 return widget->inputs;
798 /* connected VMID/Bias for lower pops */
799 if (widget->id == snd_soc_dapm_vmid) {
800 widget->inputs = snd_soc_dapm_suspend_check(widget);
801 return widget->inputs;
804 /* connected jack ? */
805 if (widget->id == snd_soc_dapm_mic ||
806 (widget->id == snd_soc_dapm_line &&
807 !list_empty(&widget->sinks))) {
808 widget->inputs = snd_soc_dapm_suspend_check(widget);
809 return widget->inputs;
812 /* signal generator */
813 if (widget->id == snd_soc_dapm_siggen) {
814 widget->inputs = snd_soc_dapm_suspend_check(widget);
815 return widget->inputs;
819 list_for_each_entry(path, &widget->sources, list_sink) {
820 DAPM_UPDATE_STAT(widget, neighbour_checks);
828 if (path->source && path->connect) {
830 con += is_connected_input_ep(path->source);
834 widget->inputs = con;
840 * Handler for generic register modifier widget.
842 int dapm_reg_event(struct snd_soc_dapm_widget *w,
843 struct snd_kcontrol *kcontrol, int event)
847 if (SND_SOC_DAPM_EVENT_ON(event))
852 soc_widget_update_bits(w, -(w->reg + 1),
853 w->mask << w->shift, val << w->shift);
857 EXPORT_SYMBOL_GPL(dapm_reg_event);
860 * Handler for regulator supply widget.
862 int dapm_regulator_event(struct snd_soc_dapm_widget *w,
863 struct snd_kcontrol *kcontrol, int event)
865 if (SND_SOC_DAPM_EVENT_ON(event))
866 return regulator_enable(w->priv);
868 return regulator_disable_deferred(w->priv, w->shift);
870 EXPORT_SYMBOL_GPL(dapm_regulator_event);
872 static int dapm_widget_power_check(struct snd_soc_dapm_widget *w)
874 if (w->power_checked)
880 w->new_power = w->power_check(w);
882 w->power_checked = true;
887 /* Generic check to see if a widget should be powered.
889 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
893 DAPM_UPDATE_STAT(w, power_checks);
895 in = is_connected_input_ep(w);
896 dapm_clear_walk(w->dapm);
897 out = is_connected_output_ep(w);
898 dapm_clear_walk(w->dapm);
899 return out != 0 && in != 0;
902 static int dapm_dai_check_power(struct snd_soc_dapm_widget *w)
904 DAPM_UPDATE_STAT(w, power_checks);
909 /* Check to see if an ADC has power */
910 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
914 DAPM_UPDATE_STAT(w, power_checks);
917 in = is_connected_input_ep(w);
918 dapm_clear_walk(w->dapm);
921 return dapm_generic_check_power(w);
925 /* Check to see if a DAC has power */
926 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
930 DAPM_UPDATE_STAT(w, power_checks);
933 out = is_connected_output_ep(w);
934 dapm_clear_walk(w->dapm);
937 return dapm_generic_check_power(w);
941 /* Check to see if a power supply is needed */
942 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
944 struct snd_soc_dapm_path *path;
946 DAPM_UPDATE_STAT(w, power_checks);
948 /* Check if one of our outputs is connected */
949 list_for_each_entry(path, &w->sinks, list_source) {
950 DAPM_UPDATE_STAT(w, neighbour_checks);
955 if (path->connected &&
956 !path->connected(path->source, path->sink))
962 if (dapm_widget_power_check(path->sink))
966 dapm_clear_walk(w->dapm);
971 static int dapm_always_on_check_power(struct snd_soc_dapm_widget *w)
976 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
977 struct snd_soc_dapm_widget *b,
985 sort = dapm_down_seq;
987 if (sort[a->id] != sort[b->id])
988 return sort[a->id] - sort[b->id];
989 if (a->subseq != b->subseq) {
991 return a->subseq - b->subseq;
993 return b->subseq - a->subseq;
995 if (a->reg != b->reg)
996 return a->reg - b->reg;
997 if (a->dapm != b->dapm)
998 return (unsigned long)a->dapm - (unsigned long)b->dapm;
1003 /* Insert a widget in order into a DAPM power sequence. */
1004 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
1005 struct list_head *list,
1008 struct snd_soc_dapm_widget *w;
1010 list_for_each_entry(w, list, power_list)
1011 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
1012 list_add_tail(&new_widget->power_list, &w->power_list);
1016 list_add_tail(&new_widget->power_list, list);
1019 static void dapm_seq_check_event(struct snd_soc_dapm_context *dapm,
1020 struct snd_soc_dapm_widget *w, int event)
1022 struct snd_soc_card *card = dapm->card;
1023 const char *ev_name;
1027 case SND_SOC_DAPM_PRE_PMU:
1028 ev_name = "PRE_PMU";
1031 case SND_SOC_DAPM_POST_PMU:
1032 ev_name = "POST_PMU";
1035 case SND_SOC_DAPM_PRE_PMD:
1036 ev_name = "PRE_PMD";
1039 case SND_SOC_DAPM_POST_PMD:
1040 ev_name = "POST_PMD";
1048 if (w->power != power)
1051 if (w->event && (w->event_flags & event)) {
1052 pop_dbg(dapm->dev, card->pop_time, "pop test : %s %s\n",
1054 trace_snd_soc_dapm_widget_event_start(w, event);
1055 ret = w->event(w, NULL, event);
1056 trace_snd_soc_dapm_widget_event_done(w, event);
1058 pr_err("%s: %s event failed: %d\n",
1059 ev_name, w->name, ret);
1063 /* Apply the coalesced changes from a DAPM sequence */
1064 static void dapm_seq_run_coalesced(struct snd_soc_dapm_context *dapm,
1065 struct list_head *pending)
1067 struct snd_soc_card *card = dapm->card;
1068 struct snd_soc_dapm_widget *w;
1070 unsigned int value = 0;
1071 unsigned int mask = 0;
1072 unsigned int cur_mask;
1074 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
1077 list_for_each_entry(w, pending, power_list) {
1078 cur_mask = 1 << w->shift;
1079 BUG_ON(reg != w->reg);
1090 pop_dbg(dapm->dev, card->pop_time,
1091 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
1092 w->name, reg, value, mask);
1094 /* Check for events */
1095 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMU);
1096 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMD);
1100 /* Any widget will do, they should all be updating the
1103 w = list_first_entry(pending, struct snd_soc_dapm_widget,
1106 pop_dbg(dapm->dev, card->pop_time,
1107 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
1108 value, mask, reg, card->pop_time);
1109 pop_wait(card->pop_time);
1110 soc_widget_update_bits(w, reg, mask, value);
1113 list_for_each_entry(w, pending, power_list) {
1114 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMU);
1115 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMD);
1119 /* Apply a DAPM power sequence.
1121 * We walk over a pre-sorted list of widgets to apply power to. In
1122 * order to minimise the number of writes to the device required
1123 * multiple widgets will be updated in a single write where possible.
1124 * Currently anything that requires more than a single write is not
1127 static void dapm_seq_run(struct snd_soc_dapm_context *dapm,
1128 struct list_head *list, int event, bool power_up)
1130 struct snd_soc_dapm_widget *w, *n;
1133 int cur_subseq = -1;
1134 int cur_reg = SND_SOC_NOPM;
1135 struct snd_soc_dapm_context *cur_dapm = NULL;
1142 sort = dapm_down_seq;
1144 list_for_each_entry_safe(w, n, list, power_list) {
1147 /* Do we need to apply any queued changes? */
1148 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
1149 w->dapm != cur_dapm || w->subseq != cur_subseq) {
1150 if (!list_empty(&pending))
1151 dapm_seq_run_coalesced(cur_dapm, &pending);
1153 if (cur_dapm && cur_dapm->seq_notifier) {
1154 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1155 if (sort[i] == cur_sort)
1156 cur_dapm->seq_notifier(cur_dapm,
1161 INIT_LIST_HEAD(&pending);
1163 cur_subseq = INT_MIN;
1164 cur_reg = SND_SOC_NOPM;
1169 case snd_soc_dapm_pre:
1171 list_for_each_entry_safe_continue(w, n, list,
1174 if (event == SND_SOC_DAPM_STREAM_START)
1176 NULL, SND_SOC_DAPM_PRE_PMU);
1177 else if (event == SND_SOC_DAPM_STREAM_STOP)
1179 NULL, SND_SOC_DAPM_PRE_PMD);
1182 case snd_soc_dapm_post:
1184 list_for_each_entry_safe_continue(w, n, list,
1187 if (event == SND_SOC_DAPM_STREAM_START)
1189 NULL, SND_SOC_DAPM_POST_PMU);
1190 else if (event == SND_SOC_DAPM_STREAM_STOP)
1192 NULL, SND_SOC_DAPM_POST_PMD);
1196 /* Queue it up for application */
1197 cur_sort = sort[w->id];
1198 cur_subseq = w->subseq;
1201 list_move(&w->power_list, &pending);
1206 dev_err(w->dapm->dev,
1207 "Failed to apply widget power: %d\n", ret);
1210 if (!list_empty(&pending))
1211 dapm_seq_run_coalesced(cur_dapm, &pending);
1213 if (cur_dapm && cur_dapm->seq_notifier) {
1214 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1215 if (sort[i] == cur_sort)
1216 cur_dapm->seq_notifier(cur_dapm,
1221 static void dapm_widget_update(struct snd_soc_dapm_context *dapm)
1223 struct snd_soc_dapm_update *update = dapm->update;
1224 struct snd_soc_dapm_widget *w;
1233 (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
1234 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
1236 pr_err("%s DAPM pre-event failed: %d\n",
1240 ret = snd_soc_update_bits(w->codec, update->reg, update->mask,
1243 pr_err("%s DAPM update failed: %d\n", w->name, ret);
1246 (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1247 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1249 pr_err("%s DAPM post-event failed: %d\n",
1254 /* Async callback run prior to DAPM sequences - brings to _PREPARE if
1255 * they're changing state.
1257 static void dapm_pre_sequence_async(void *data, async_cookie_t cookie)
1259 struct snd_soc_dapm_context *d = data;
1262 /* If we're off and we're not supposed to be go into STANDBY */
1263 if (d->bias_level == SND_SOC_BIAS_OFF &&
1264 d->target_bias_level != SND_SOC_BIAS_OFF) {
1266 pm_runtime_get_sync(d->dev);
1268 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1271 "Failed to turn on bias: %d\n", ret);
1274 /* Prepare for a STADDBY->ON or ON->STANDBY transition */
1275 if (d->bias_level != d->target_bias_level) {
1276 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);
1279 "Failed to prepare bias: %d\n", ret);
1283 /* Async callback run prior to DAPM sequences - brings to their final
1286 static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
1288 struct snd_soc_dapm_context *d = data;
1291 /* If we just powered the last thing off drop to standby bias */
1292 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1293 (d->target_bias_level == SND_SOC_BIAS_STANDBY ||
1294 d->target_bias_level == SND_SOC_BIAS_OFF)) {
1295 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1297 dev_err(d->dev, "Failed to apply standby bias: %d\n",
1301 /* If we're in standby and can support bias off then do that */
1302 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1303 d->target_bias_level == SND_SOC_BIAS_OFF) {
1304 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);
1306 dev_err(d->dev, "Failed to turn off bias: %d\n", ret);
1309 pm_runtime_put(d->dev);
1312 /* If we just powered up then move to active bias */
1313 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1314 d->target_bias_level == SND_SOC_BIAS_ON) {
1315 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);
1317 dev_err(d->dev, "Failed to apply active bias: %d\n",
1322 static void dapm_widget_set_peer_power(struct snd_soc_dapm_widget *peer,
1323 bool power, bool connect)
1325 /* If a connection is being made or broken then that update
1326 * will have marked the peer dirty, otherwise the widgets are
1327 * not connected and this update has no impact. */
1331 /* If the peer is already in the state we're moving to then we
1332 * won't have an impact on it. */
1333 if (power != peer->power)
1334 dapm_mark_dirty(peer, "peer state change");
1337 static void dapm_widget_set_power(struct snd_soc_dapm_widget *w, bool power,
1338 struct list_head *up_list,
1339 struct list_head *down_list)
1341 struct snd_soc_dapm_path *path;
1343 if (w->power == power)
1346 trace_snd_soc_dapm_widget_power(w, power);
1348 /* If we changed our power state perhaps our neigbours changed
1351 list_for_each_entry(path, &w->sources, list_sink) {
1353 dapm_widget_set_peer_power(path->source, power,
1358 case snd_soc_dapm_supply:
1359 case snd_soc_dapm_regulator_supply:
1360 /* Supplies can't affect their outputs, only their inputs */
1363 list_for_each_entry(path, &w->sinks, list_source) {
1365 dapm_widget_set_peer_power(path->sink, power,
1373 dapm_seq_insert(w, up_list, true);
1375 dapm_seq_insert(w, down_list, false);
1380 static void dapm_power_one_widget(struct snd_soc_dapm_widget *w,
1381 struct list_head *up_list,
1382 struct list_head *down_list)
1387 case snd_soc_dapm_pre:
1388 dapm_seq_insert(w, down_list, false);
1390 case snd_soc_dapm_post:
1391 dapm_seq_insert(w, up_list, true);
1395 power = dapm_widget_power_check(w);
1397 dapm_widget_set_power(w, power, up_list, down_list);
1403 * Scan each dapm widget for complete audio path.
1404 * A complete path is a route that has valid endpoints i.e.:-
1406 * o DAC to output pin.
1407 * o Input Pin to ADC.
1408 * o Input pin to Output pin (bypass, sidetone)
1409 * o DAC to ADC (loopback).
1411 static int dapm_power_widgets(struct snd_soc_dapm_context *dapm, int event)
1413 struct snd_soc_card *card = dapm->card;
1414 struct snd_soc_dapm_widget *w;
1415 struct snd_soc_dapm_context *d;
1417 LIST_HEAD(down_list);
1418 LIST_HEAD(async_domain);
1419 enum snd_soc_bias_level bias;
1421 trace_snd_soc_dapm_start(card);
1423 list_for_each_entry(d, &card->dapm_list, list) {
1424 if (d->n_widgets || d->codec == NULL) {
1425 if (d->idle_bias_off)
1426 d->target_bias_level = SND_SOC_BIAS_OFF;
1428 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1434 /* Check which widgets we need to power and store them in
1435 * lists indicating if they should be powered up or down. We
1436 * only check widgets that have been flagged as dirty but note
1437 * that new widgets may be added to the dirty list while we
1440 list_for_each_entry(w, &card->dapm_dirty, dirty) {
1441 dapm_power_one_widget(w, &up_list, &down_list);
1444 list_for_each_entry(w, &card->widgets, list) {
1445 list_del_init(&w->dirty);
1450 /* Supplies and micbiases only bring the
1451 * context up to STANDBY as unless something
1452 * else is active and passing audio they
1453 * generally don't require full power. Signal
1454 * generators are virtual pins and have no
1455 * power impact themselves.
1458 case snd_soc_dapm_siggen:
1460 case snd_soc_dapm_supply:
1461 case snd_soc_dapm_regulator_supply:
1462 case snd_soc_dapm_micbias:
1463 if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
1464 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1467 d->target_bias_level = SND_SOC_BIAS_ON;
1474 /* If there are no DAPM widgets then try to figure out power from the
1477 if (!dapm->n_widgets) {
1479 case SND_SOC_DAPM_STREAM_START:
1480 case SND_SOC_DAPM_STREAM_RESUME:
1481 dapm->target_bias_level = SND_SOC_BIAS_ON;
1483 case SND_SOC_DAPM_STREAM_STOP:
1484 if (dapm->codec && dapm->codec->active)
1485 dapm->target_bias_level = SND_SOC_BIAS_ON;
1487 dapm->target_bias_level = SND_SOC_BIAS_STANDBY;
1489 case SND_SOC_DAPM_STREAM_SUSPEND:
1490 dapm->target_bias_level = SND_SOC_BIAS_STANDBY;
1492 case SND_SOC_DAPM_STREAM_NOP:
1493 dapm->target_bias_level = dapm->bias_level;
1500 /* Force all contexts in the card to the same bias state if
1501 * they're not ground referenced.
1503 bias = SND_SOC_BIAS_OFF;
1504 list_for_each_entry(d, &card->dapm_list, list)
1505 if (d->target_bias_level > bias)
1506 bias = d->target_bias_level;
1507 list_for_each_entry(d, &card->dapm_list, list)
1508 if (!d->idle_bias_off)
1509 d->target_bias_level = bias;
1511 trace_snd_soc_dapm_walk_done(card);
1513 /* Run all the bias changes in parallel */
1514 list_for_each_entry(d, &dapm->card->dapm_list, list)
1515 async_schedule_domain(dapm_pre_sequence_async, d,
1517 async_synchronize_full_domain(&async_domain);
1519 /* Power down widgets first; try to avoid amplifying pops. */
1520 dapm_seq_run(dapm, &down_list, event, false);
1522 dapm_widget_update(dapm);
1525 dapm_seq_run(dapm, &up_list, event, true);
1527 /* Run all the bias changes in parallel */
1528 list_for_each_entry(d, &dapm->card->dapm_list, list)
1529 async_schedule_domain(dapm_post_sequence_async, d,
1531 async_synchronize_full_domain(&async_domain);
1533 /* do we need to notify any clients that DAPM event is complete */
1534 list_for_each_entry(d, &card->dapm_list, list) {
1535 if (d->stream_event)
1536 d->stream_event(d, event);
1539 pop_dbg(dapm->dev, card->pop_time,
1540 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
1541 pop_wait(card->pop_time);
1543 trace_snd_soc_dapm_done(card);
1548 #ifdef CONFIG_DEBUG_FS
1549 static ssize_t dapm_widget_power_read_file(struct file *file,
1550 char __user *user_buf,
1551 size_t count, loff_t *ppos)
1553 struct snd_soc_dapm_widget *w = file->private_data;
1557 struct snd_soc_dapm_path *p = NULL;
1559 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1563 in = is_connected_input_ep(w);
1564 dapm_clear_walk(w->dapm);
1565 out = is_connected_output_ep(w);
1566 dapm_clear_walk(w->dapm);
1568 ret = snprintf(buf, PAGE_SIZE, "%s: %s%s in %d out %d",
1569 w->name, w->power ? "On" : "Off",
1570 w->force ? " (forced)" : "", in, out);
1573 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1574 " - R%d(0x%x) bit %d",
1575 w->reg, w->reg, w->shift);
1577 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1580 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1582 w->active ? "active" : "inactive");
1584 list_for_each_entry(p, &w->sources, list_sink) {
1585 if (p->connected && !p->connected(w, p->sink))
1589 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1590 " in \"%s\" \"%s\"\n",
1591 p->name ? p->name : "static",
1594 list_for_each_entry(p, &w->sinks, list_source) {
1595 if (p->connected && !p->connected(w, p->sink))
1599 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1600 " out \"%s\" \"%s\"\n",
1601 p->name ? p->name : "static",
1605 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1611 static const struct file_operations dapm_widget_power_fops = {
1612 .open = simple_open,
1613 .read = dapm_widget_power_read_file,
1614 .llseek = default_llseek,
1617 static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
1618 size_t count, loff_t *ppos)
1620 struct snd_soc_dapm_context *dapm = file->private_data;
1623 switch (dapm->bias_level) {
1624 case SND_SOC_BIAS_ON:
1627 case SND_SOC_BIAS_PREPARE:
1628 level = "Prepare\n";
1630 case SND_SOC_BIAS_STANDBY:
1631 level = "Standby\n";
1633 case SND_SOC_BIAS_OFF:
1638 level = "Unknown\n";
1642 return simple_read_from_buffer(user_buf, count, ppos, level,
1646 static const struct file_operations dapm_bias_fops = {
1647 .open = simple_open,
1648 .read = dapm_bias_read_file,
1649 .llseek = default_llseek,
1652 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1653 struct dentry *parent)
1657 dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
1659 if (!dapm->debugfs_dapm) {
1661 "Failed to create DAPM debugfs directory\n");
1665 d = debugfs_create_file("bias_level", 0444,
1666 dapm->debugfs_dapm, dapm,
1670 "ASoC: Failed to create bias level debugfs file\n");
1673 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1675 struct snd_soc_dapm_context *dapm = w->dapm;
1678 if (!dapm->debugfs_dapm || !w->name)
1681 d = debugfs_create_file(w->name, 0444,
1682 dapm->debugfs_dapm, w,
1683 &dapm_widget_power_fops);
1685 dev_warn(w->dapm->dev,
1686 "ASoC: Failed to create %s debugfs file\n",
1690 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1692 debugfs_remove_recursive(dapm->debugfs_dapm);
1696 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1697 struct dentry *parent)
1701 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1705 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1711 /* test and update the power status of a mux widget */
1712 int snd_soc_dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1713 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e)
1715 struct snd_soc_dapm_path *path;
1718 if (widget->id != snd_soc_dapm_mux &&
1719 widget->id != snd_soc_dapm_virt_mux &&
1720 widget->id != snd_soc_dapm_value_mux)
1723 /* find dapm widget path assoc with kcontrol */
1724 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1725 if (path->kcontrol != kcontrol)
1728 if (!path->name || !e->texts[mux])
1732 /* we now need to match the string in the enum to the path */
1733 if (!(strcmp(path->name, e->texts[mux]))) {
1734 path->connect = 1; /* new connection */
1735 dapm_mark_dirty(path->source, "mux connection");
1738 dapm_mark_dirty(path->source,
1739 "mux disconnection");
1740 path->connect = 0; /* old connection must be powered down */
1745 dapm_mark_dirty(widget, "mux change");
1746 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1751 EXPORT_SYMBOL_GPL(snd_soc_dapm_mux_update_power);
1753 /* test and update the power status of a mixer or switch widget */
1754 int snd_soc_dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1755 struct snd_kcontrol *kcontrol, int connect)
1757 struct snd_soc_dapm_path *path;
1760 if (widget->id != snd_soc_dapm_mixer &&
1761 widget->id != snd_soc_dapm_mixer_named_ctl &&
1762 widget->id != snd_soc_dapm_switch)
1765 /* find dapm widget path assoc with kcontrol */
1766 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1767 if (path->kcontrol != kcontrol)
1770 /* found, now check type */
1772 path->connect = connect;
1773 dapm_mark_dirty(path->source, "mixer connection");
1777 dapm_mark_dirty(widget, "mixer update");
1778 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1783 EXPORT_SYMBOL_GPL(snd_soc_dapm_mixer_update_power);
1785 /* show dapm widget status in sys fs */
1786 static ssize_t dapm_widget_show(struct device *dev,
1787 struct device_attribute *attr, char *buf)
1789 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
1790 struct snd_soc_codec *codec =rtd->codec;
1791 struct snd_soc_dapm_widget *w;
1793 char *state = "not set";
1795 list_for_each_entry(w, &codec->card->widgets, list) {
1796 if (w->dapm != &codec->dapm)
1799 /* only display widgets that burnm power */
1801 case snd_soc_dapm_hp:
1802 case snd_soc_dapm_mic:
1803 case snd_soc_dapm_spk:
1804 case snd_soc_dapm_line:
1805 case snd_soc_dapm_micbias:
1806 case snd_soc_dapm_dac:
1807 case snd_soc_dapm_adc:
1808 case snd_soc_dapm_pga:
1809 case snd_soc_dapm_out_drv:
1810 case snd_soc_dapm_mixer:
1811 case snd_soc_dapm_mixer_named_ctl:
1812 case snd_soc_dapm_supply:
1813 case snd_soc_dapm_regulator_supply:
1815 count += sprintf(buf + count, "%s: %s\n",
1816 w->name, w->power ? "On":"Off");
1823 switch (codec->dapm.bias_level) {
1824 case SND_SOC_BIAS_ON:
1827 case SND_SOC_BIAS_PREPARE:
1830 case SND_SOC_BIAS_STANDBY:
1833 case SND_SOC_BIAS_OFF:
1837 count += sprintf(buf + count, "PM State: %s\n", state);
1842 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
1844 int snd_soc_dapm_sys_add(struct device *dev)
1846 return device_create_file(dev, &dev_attr_dapm_widget);
1849 static void snd_soc_dapm_sys_remove(struct device *dev)
1851 device_remove_file(dev, &dev_attr_dapm_widget);
1854 /* free all dapm widgets and resources */
1855 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
1857 struct snd_soc_dapm_widget *w, *next_w;
1858 struct snd_soc_dapm_path *p, *next_p;
1860 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
1861 if (w->dapm != dapm)
1865 * remove source and sink paths associated to this widget.
1866 * While removing the path, remove reference to it from both
1867 * source and sink widgets so that path is removed only once.
1869 list_for_each_entry_safe(p, next_p, &w->sources, list_sink) {
1870 list_del(&p->list_sink);
1871 list_del(&p->list_source);
1873 kfree(p->long_name);
1876 list_for_each_entry_safe(p, next_p, &w->sinks, list_source) {
1877 list_del(&p->list_sink);
1878 list_del(&p->list_source);
1880 kfree(p->long_name);
1883 kfree(w->kcontrols);
1889 static struct snd_soc_dapm_widget *dapm_find_widget(
1890 struct snd_soc_dapm_context *dapm, const char *pin,
1891 bool search_other_contexts)
1893 struct snd_soc_dapm_widget *w;
1894 struct snd_soc_dapm_widget *fallback = NULL;
1896 list_for_each_entry(w, &dapm->card->widgets, list) {
1897 if (!strcmp(w->name, pin)) {
1898 if (w->dapm == dapm)
1905 if (search_other_contexts)
1911 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
1912 const char *pin, int status)
1914 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
1917 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
1921 if (w->connected != status)
1922 dapm_mark_dirty(w, "pin configuration");
1924 w->connected = status;
1932 * snd_soc_dapm_sync - scan and power dapm paths
1933 * @dapm: DAPM context
1935 * Walks all dapm audio paths and powers widgets according to their
1936 * stream or path usage.
1938 * Returns 0 for success.
1940 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
1943 * Suppress early reports (eg, jacks syncing their state) to avoid
1944 * silly DAPM runs during card startup.
1946 if (!dapm->card || !dapm->card->instantiated)
1949 return dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
1951 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
1953 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
1954 const struct snd_soc_dapm_route *route)
1956 struct snd_soc_dapm_path *path;
1957 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
1958 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
1960 const char *control = route->control;
1962 char prefixed_sink[80];
1963 char prefixed_source[80];
1966 if (dapm->codec && dapm->codec->name_prefix) {
1967 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
1968 dapm->codec->name_prefix, route->sink);
1969 sink = prefixed_sink;
1970 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
1971 dapm->codec->name_prefix, route->source);
1972 source = prefixed_source;
1975 source = route->source;
1979 * find src and dest widgets over all widgets but favor a widget from
1980 * current DAPM context
1982 list_for_each_entry(w, &dapm->card->widgets, list) {
1983 if (!wsink && !(strcmp(w->name, sink))) {
1985 if (w->dapm == dapm)
1989 if (!wsource && !(strcmp(w->name, source))) {
1991 if (w->dapm == dapm)
1995 /* use widget from another DAPM context if not found from this */
2001 if (wsource == NULL || wsink == NULL)
2004 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
2008 path->source = wsource;
2010 path->connected = route->connected;
2011 INIT_LIST_HEAD(&path->list);
2012 INIT_LIST_HEAD(&path->list_source);
2013 INIT_LIST_HEAD(&path->list_sink);
2015 /* check for external widgets */
2016 if (wsink->id == snd_soc_dapm_input) {
2017 if (wsource->id == snd_soc_dapm_micbias ||
2018 wsource->id == snd_soc_dapm_mic ||
2019 wsource->id == snd_soc_dapm_line ||
2020 wsource->id == snd_soc_dapm_output)
2023 if (wsource->id == snd_soc_dapm_output) {
2024 if (wsink->id == snd_soc_dapm_spk ||
2025 wsink->id == snd_soc_dapm_hp ||
2026 wsink->id == snd_soc_dapm_line ||
2027 wsink->id == snd_soc_dapm_input)
2031 /* connect static paths */
2032 if (control == NULL) {
2033 list_add(&path->list, &dapm->card->paths);
2034 list_add(&path->list_sink, &wsink->sources);
2035 list_add(&path->list_source, &wsource->sinks);
2040 /* connect dynamic paths */
2041 switch (wsink->id) {
2042 case snd_soc_dapm_adc:
2043 case snd_soc_dapm_dac:
2044 case snd_soc_dapm_pga:
2045 case snd_soc_dapm_out_drv:
2046 case snd_soc_dapm_input:
2047 case snd_soc_dapm_output:
2048 case snd_soc_dapm_siggen:
2049 case snd_soc_dapm_micbias:
2050 case snd_soc_dapm_vmid:
2051 case snd_soc_dapm_pre:
2052 case snd_soc_dapm_post:
2053 case snd_soc_dapm_supply:
2054 case snd_soc_dapm_regulator_supply:
2055 case snd_soc_dapm_aif_in:
2056 case snd_soc_dapm_aif_out:
2057 case snd_soc_dapm_dai:
2058 list_add(&path->list, &dapm->card->paths);
2059 list_add(&path->list_sink, &wsink->sources);
2060 list_add(&path->list_source, &wsource->sinks);
2063 case snd_soc_dapm_mux:
2064 case snd_soc_dapm_virt_mux:
2065 case snd_soc_dapm_value_mux:
2066 ret = dapm_connect_mux(dapm, wsource, wsink, path, control,
2067 &wsink->kcontrol_news[0]);
2071 case snd_soc_dapm_switch:
2072 case snd_soc_dapm_mixer:
2073 case snd_soc_dapm_mixer_named_ctl:
2074 ret = dapm_connect_mixer(dapm, wsource, wsink, path, control);
2078 case snd_soc_dapm_hp:
2079 case snd_soc_dapm_mic:
2080 case snd_soc_dapm_line:
2081 case snd_soc_dapm_spk:
2082 list_add(&path->list, &dapm->card->paths);
2083 list_add(&path->list_sink, &wsink->sources);
2084 list_add(&path->list_source, &wsource->sinks);
2091 dev_warn(dapm->dev, "asoc: no dapm match for %s --> %s --> %s\n",
2092 source, control, sink);
2098 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
2099 * @dapm: DAPM context
2100 * @route: audio routes
2101 * @num: number of routes
2103 * Connects 2 dapm widgets together via a named audio path. The sink is
2104 * the widget receiving the audio signal, whilst the source is the sender
2105 * of the audio signal.
2107 * Returns 0 for success else error. On error all resources can be freed
2108 * with a call to snd_soc_card_free().
2110 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
2111 const struct snd_soc_dapm_route *route, int num)
2115 for (i = 0; i < num; i++) {
2116 ret = snd_soc_dapm_add_route(dapm, route);
2118 dev_err(dapm->dev, "Failed to add route %s->%s\n",
2119 route->source, route->sink);
2127 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
2129 static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm,
2130 const struct snd_soc_dapm_route *route)
2132 struct snd_soc_dapm_widget *source = dapm_find_widget(dapm,
2135 struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm,
2138 struct snd_soc_dapm_path *path;
2142 dev_err(dapm->dev, "Unable to find source %s for weak route\n",
2148 dev_err(dapm->dev, "Unable to find sink %s for weak route\n",
2153 if (route->control || route->connected)
2154 dev_warn(dapm->dev, "Ignoring control for weak route %s->%s\n",
2155 route->source, route->sink);
2157 list_for_each_entry(path, &source->sinks, list_source) {
2158 if (path->sink == sink) {
2165 dev_err(dapm->dev, "No path found for weak route %s->%s\n",
2166 route->source, route->sink);
2168 dev_warn(dapm->dev, "%d paths found for weak route %s->%s\n",
2169 count, route->source, route->sink);
2175 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
2176 * @dapm: DAPM context
2177 * @route: audio routes
2178 * @num: number of routes
2180 * Mark existing routes matching those specified in the passed array
2181 * as being weak, meaning that they are ignored for the purpose of
2182 * power decisions. The main intended use case is for sidetone paths
2183 * which couple audio between other independent paths if they are both
2184 * active in order to make the combination work better at the user
2185 * level but which aren't intended to be "used".
2187 * Note that CODEC drivers should not use this as sidetone type paths
2188 * can frequently also be used as bypass paths.
2190 int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm,
2191 const struct snd_soc_dapm_route *route, int num)
2196 for (i = 0; i < num; i++) {
2197 err = snd_soc_dapm_weak_route(dapm, route);
2205 EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes);
2208 * snd_soc_dapm_new_widgets - add new dapm widgets
2209 * @dapm: DAPM context
2211 * Checks the codec for any new dapm widgets and creates them if found.
2213 * Returns 0 for success.
2215 int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context *dapm)
2217 struct snd_soc_dapm_widget *w;
2220 list_for_each_entry(w, &dapm->card->widgets, list)
2225 if (w->num_kcontrols) {
2226 w->kcontrols = kzalloc(w->num_kcontrols *
2227 sizeof(struct snd_kcontrol *),
2234 case snd_soc_dapm_switch:
2235 case snd_soc_dapm_mixer:
2236 case snd_soc_dapm_mixer_named_ctl:
2239 case snd_soc_dapm_mux:
2240 case snd_soc_dapm_virt_mux:
2241 case snd_soc_dapm_value_mux:
2244 case snd_soc_dapm_pga:
2245 case snd_soc_dapm_out_drv:
2252 /* Read the initial power state from the device */
2254 val = soc_widget_read(w, w->reg);
2255 val &= 1 << w->shift;
2265 dapm_mark_dirty(w, "new widget");
2266 dapm_debugfs_add_widget(w);
2269 dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
2272 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
2275 * snd_soc_dapm_get_volsw - dapm mixer get callback
2276 * @kcontrol: mixer control
2277 * @ucontrol: control element information
2279 * Callback to get the value of a dapm mixer control.
2281 * Returns 0 for success.
2283 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
2284 struct snd_ctl_elem_value *ucontrol)
2286 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2287 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2288 struct soc_mixer_control *mc =
2289 (struct soc_mixer_control *)kcontrol->private_value;
2290 unsigned int reg = mc->reg;
2291 unsigned int shift = mc->shift;
2292 unsigned int rshift = mc->rshift;
2294 unsigned int invert = mc->invert;
2295 unsigned int mask = (1 << fls(max)) - 1;
2297 ucontrol->value.integer.value[0] =
2298 (snd_soc_read(widget->codec, reg) >> shift) & mask;
2299 if (shift != rshift)
2300 ucontrol->value.integer.value[1] =
2301 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
2303 ucontrol->value.integer.value[0] =
2304 max - ucontrol->value.integer.value[0];
2305 if (shift != rshift)
2306 ucontrol->value.integer.value[1] =
2307 max - ucontrol->value.integer.value[1];
2312 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
2315 * snd_soc_dapm_put_volsw - dapm mixer set callback
2316 * @kcontrol: mixer control
2317 * @ucontrol: control element information
2319 * Callback to set the value of a dapm mixer control.
2321 * Returns 0 for success.
2323 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
2324 struct snd_ctl_elem_value *ucontrol)
2326 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2327 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2328 struct snd_soc_codec *codec = widget->codec;
2329 struct soc_mixer_control *mc =
2330 (struct soc_mixer_control *)kcontrol->private_value;
2331 unsigned int reg = mc->reg;
2332 unsigned int shift = mc->shift;
2334 unsigned int mask = (1 << fls(max)) - 1;
2335 unsigned int invert = mc->invert;
2337 int connect, change;
2338 struct snd_soc_dapm_update update;
2341 val = (ucontrol->value.integer.value[0] & mask);
2345 mask = mask << shift;
2349 /* new connection */
2350 connect = invert ? 0 : 1;
2352 /* old connection must be powered down */
2353 connect = invert ? 1 : 0;
2355 mutex_lock(&codec->mutex);
2357 change = snd_soc_test_bits(widget->codec, reg, mask, val);
2359 for (wi = 0; wi < wlist->num_widgets; wi++) {
2360 widget = wlist->widgets[wi];
2362 widget->value = val;
2364 update.kcontrol = kcontrol;
2365 update.widget = widget;
2369 widget->dapm->update = &update;
2371 snd_soc_dapm_mixer_update_power(widget, kcontrol, connect);
2373 widget->dapm->update = NULL;
2377 mutex_unlock(&codec->mutex);
2380 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
2383 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
2384 * @kcontrol: mixer control
2385 * @ucontrol: control element information
2387 * Callback to get the value of a dapm enumerated double mixer control.
2389 * Returns 0 for success.
2391 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
2392 struct snd_ctl_elem_value *ucontrol)
2394 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2395 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2396 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2397 unsigned int val, bitmask;
2399 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2401 val = snd_soc_read(widget->codec, e->reg);
2402 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
2403 if (e->shift_l != e->shift_r)
2404 ucontrol->value.enumerated.item[1] =
2405 (val >> e->shift_r) & (bitmask - 1);
2409 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
2412 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
2413 * @kcontrol: mixer control
2414 * @ucontrol: control element information
2416 * Callback to set the value of a dapm enumerated double mixer control.
2418 * Returns 0 for success.
2420 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
2421 struct snd_ctl_elem_value *ucontrol)
2423 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2424 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2425 struct snd_soc_codec *codec = widget->codec;
2426 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2427 unsigned int val, mux, change;
2428 unsigned int mask, bitmask;
2429 struct snd_soc_dapm_update update;
2432 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2434 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2436 mux = ucontrol->value.enumerated.item[0];
2437 val = mux << e->shift_l;
2438 mask = (bitmask - 1) << e->shift_l;
2439 if (e->shift_l != e->shift_r) {
2440 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2442 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2443 mask |= (bitmask - 1) << e->shift_r;
2446 mutex_lock(&codec->mutex);
2448 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2450 for (wi = 0; wi < wlist->num_widgets; wi++) {
2451 widget = wlist->widgets[wi];
2453 widget->value = val;
2455 update.kcontrol = kcontrol;
2456 update.widget = widget;
2457 update.reg = e->reg;
2460 widget->dapm->update = &update;
2462 snd_soc_dapm_mux_update_power(widget, kcontrol, mux, e);
2464 widget->dapm->update = NULL;
2468 mutex_unlock(&codec->mutex);
2471 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
2474 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
2475 * @kcontrol: mixer control
2476 * @ucontrol: control element information
2478 * Returns 0 for success.
2480 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
2481 struct snd_ctl_elem_value *ucontrol)
2483 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2484 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2486 ucontrol->value.enumerated.item[0] = widget->value;
2490 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt);
2493 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
2494 * @kcontrol: mixer control
2495 * @ucontrol: control element information
2497 * Returns 0 for success.
2499 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
2500 struct snd_ctl_elem_value *ucontrol)
2502 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2503 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2504 struct snd_soc_codec *codec = widget->codec;
2505 struct soc_enum *e =
2506 (struct soc_enum *)kcontrol->private_value;
2511 if (ucontrol->value.enumerated.item[0] >= e->max)
2514 mutex_lock(&codec->mutex);
2516 change = widget->value != ucontrol->value.enumerated.item[0];
2518 for (wi = 0; wi < wlist->num_widgets; wi++) {
2519 widget = wlist->widgets[wi];
2521 widget->value = ucontrol->value.enumerated.item[0];
2523 snd_soc_dapm_mux_update_power(widget, kcontrol, widget->value, e);
2527 mutex_unlock(&codec->mutex);
2530 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt);
2533 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
2535 * @kcontrol: mixer control
2536 * @ucontrol: control element information
2538 * Callback to get the value of a dapm semi enumerated double mixer control.
2540 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2541 * used for handling bitfield coded enumeration for example.
2543 * Returns 0 for success.
2545 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
2546 struct snd_ctl_elem_value *ucontrol)
2548 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2549 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2550 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2551 unsigned int reg_val, val, mux;
2553 reg_val = snd_soc_read(widget->codec, e->reg);
2554 val = (reg_val >> e->shift_l) & e->mask;
2555 for (mux = 0; mux < e->max; mux++) {
2556 if (val == e->values[mux])
2559 ucontrol->value.enumerated.item[0] = mux;
2560 if (e->shift_l != e->shift_r) {
2561 val = (reg_val >> e->shift_r) & e->mask;
2562 for (mux = 0; mux < e->max; mux++) {
2563 if (val == e->values[mux])
2566 ucontrol->value.enumerated.item[1] = mux;
2571 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
2574 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
2576 * @kcontrol: mixer control
2577 * @ucontrol: control element information
2579 * Callback to set the value of a dapm semi enumerated double mixer control.
2581 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2582 * used for handling bitfield coded enumeration for example.
2584 * Returns 0 for success.
2586 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
2587 struct snd_ctl_elem_value *ucontrol)
2589 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2590 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2591 struct snd_soc_codec *codec = widget->codec;
2592 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2593 unsigned int val, mux, change;
2595 struct snd_soc_dapm_update update;
2598 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2600 mux = ucontrol->value.enumerated.item[0];
2601 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2602 mask = e->mask << e->shift_l;
2603 if (e->shift_l != e->shift_r) {
2604 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2606 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2607 mask |= e->mask << e->shift_r;
2610 mutex_lock(&codec->mutex);
2612 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2614 for (wi = 0; wi < wlist->num_widgets; wi++) {
2615 widget = wlist->widgets[wi];
2617 widget->value = val;
2619 update.kcontrol = kcontrol;
2620 update.widget = widget;
2621 update.reg = e->reg;
2624 widget->dapm->update = &update;
2626 snd_soc_dapm_mux_update_power(widget, kcontrol, mux, e);
2628 widget->dapm->update = NULL;
2632 mutex_unlock(&codec->mutex);
2635 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
2638 * snd_soc_dapm_info_pin_switch - Info for a pin switch
2640 * @kcontrol: mixer control
2641 * @uinfo: control element information
2643 * Callback to provide information about a pin switch control.
2645 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
2646 struct snd_ctl_elem_info *uinfo)
2648 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2650 uinfo->value.integer.min = 0;
2651 uinfo->value.integer.max = 1;
2655 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
2658 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
2660 * @kcontrol: mixer control
2663 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
2664 struct snd_ctl_elem_value *ucontrol)
2666 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
2667 const char *pin = (const char *)kcontrol->private_value;
2669 mutex_lock(&card->mutex);
2671 ucontrol->value.integer.value[0] =
2672 snd_soc_dapm_get_pin_status(&card->dapm, pin);
2674 mutex_unlock(&card->mutex);
2678 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
2681 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
2683 * @kcontrol: mixer control
2686 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
2687 struct snd_ctl_elem_value *ucontrol)
2689 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
2690 const char *pin = (const char *)kcontrol->private_value;
2692 mutex_lock(&card->mutex);
2694 if (ucontrol->value.integer.value[0])
2695 snd_soc_dapm_enable_pin(&card->dapm, pin);
2697 snd_soc_dapm_disable_pin(&card->dapm, pin);
2699 snd_soc_dapm_sync(&card->dapm);
2701 mutex_unlock(&card->mutex);
2705 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
2707 static struct snd_soc_dapm_widget *
2708 snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
2709 const struct snd_soc_dapm_widget *widget)
2711 struct snd_soc_dapm_widget *w;
2715 if ((w = dapm_cnew_widget(widget)) == NULL)
2719 case snd_soc_dapm_regulator_supply:
2720 w->priv = devm_regulator_get(dapm->dev, w->name);
2721 if (IS_ERR(w->priv)) {
2722 ret = PTR_ERR(w->priv);
2723 dev_err(dapm->dev, "Failed to request %s: %d\n",
2732 name_len = strlen(widget->name) + 1;
2733 if (dapm->codec && dapm->codec->name_prefix)
2734 name_len += 1 + strlen(dapm->codec->name_prefix);
2735 w->name = kmalloc(name_len, GFP_KERNEL);
2736 if (w->name == NULL) {
2740 if (dapm->codec && dapm->codec->name_prefix)
2741 snprintf((char *)w->name, name_len, "%s %s",
2742 dapm->codec->name_prefix, widget->name);
2744 snprintf((char *)w->name, name_len, "%s", widget->name);
2747 case snd_soc_dapm_switch:
2748 case snd_soc_dapm_mixer:
2749 case snd_soc_dapm_mixer_named_ctl:
2750 w->power_check = dapm_generic_check_power;
2752 case snd_soc_dapm_mux:
2753 case snd_soc_dapm_virt_mux:
2754 case snd_soc_dapm_value_mux:
2755 w->power_check = dapm_generic_check_power;
2757 case snd_soc_dapm_adc:
2758 case snd_soc_dapm_aif_out:
2759 w->power_check = dapm_adc_check_power;
2761 case snd_soc_dapm_dac:
2762 case snd_soc_dapm_aif_in:
2763 w->power_check = dapm_dac_check_power;
2765 case snd_soc_dapm_pga:
2766 case snd_soc_dapm_out_drv:
2767 case snd_soc_dapm_input:
2768 case snd_soc_dapm_output:
2769 case snd_soc_dapm_micbias:
2770 case snd_soc_dapm_spk:
2771 case snd_soc_dapm_hp:
2772 case snd_soc_dapm_mic:
2773 case snd_soc_dapm_line:
2774 w->power_check = dapm_generic_check_power;
2776 case snd_soc_dapm_supply:
2777 case snd_soc_dapm_regulator_supply:
2778 w->power_check = dapm_supply_check_power;
2780 case snd_soc_dapm_dai:
2781 w->power_check = dapm_dai_check_power;
2784 w->power_check = dapm_always_on_check_power;
2790 w->codec = dapm->codec;
2791 w->platform = dapm->platform;
2792 INIT_LIST_HEAD(&w->sources);
2793 INIT_LIST_HEAD(&w->sinks);
2794 INIT_LIST_HEAD(&w->list);
2795 INIT_LIST_HEAD(&w->dirty);
2796 list_add(&w->list, &dapm->card->widgets);
2798 /* machine layer set ups unconnected pins and insertions */
2804 * snd_soc_dapm_new_controls - create new dapm controls
2805 * @dapm: DAPM context
2806 * @widget: widget array
2807 * @num: number of widgets
2809 * Creates new DAPM controls based upon the templates.
2811 * Returns 0 for success else error.
2813 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
2814 const struct snd_soc_dapm_widget *widget,
2817 struct snd_soc_dapm_widget *w;
2820 for (i = 0; i < num; i++) {
2821 w = snd_soc_dapm_new_control(dapm, widget);
2824 "ASoC: Failed to create DAPM control %s\n",
2832 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
2834 int snd_soc_dapm_new_dai_widgets(struct snd_soc_dapm_context *dapm,
2835 struct snd_soc_dai *dai)
2837 struct snd_soc_dapm_widget template;
2838 struct snd_soc_dapm_widget *w;
2840 WARN_ON(dapm->dev != dai->dev);
2842 memset(&template, 0, sizeof(template));
2843 template.reg = SND_SOC_NOPM;
2845 if (dai->driver->playback.stream_name) {
2846 template.id = snd_soc_dapm_dai;
2847 template.name = dai->driver->playback.stream_name;
2848 template.sname = dai->driver->playback.stream_name;
2850 dev_dbg(dai->dev, "adding %s widget\n",
2853 w = snd_soc_dapm_new_control(dapm, &template);
2855 dev_err(dapm->dev, "Failed to create %s widget\n",
2856 dai->driver->playback.stream_name);
2860 dai->playback_widget = w;
2863 if (dai->driver->capture.stream_name) {
2864 template.id = snd_soc_dapm_dai;
2865 template.name = dai->driver->capture.stream_name;
2866 template.sname = dai->driver->capture.stream_name;
2868 dev_dbg(dai->dev, "adding %s widget\n",
2871 w = snd_soc_dapm_new_control(dapm, &template);
2873 dev_err(dapm->dev, "Failed to create %s widget\n",
2874 dai->driver->capture.stream_name);
2878 dai->capture_widget = w;
2884 int snd_soc_dapm_link_dai_widgets(struct snd_soc_card *card)
2886 struct snd_soc_dapm_widget *dai_w, *w;
2887 struct snd_soc_dai *dai;
2888 struct snd_soc_dapm_route r;
2890 memset(&r, 0, sizeof(r));
2892 /* For each DAI widget... */
2893 list_for_each_entry(dai_w, &card->widgets, list) {
2894 if (dai_w->id != snd_soc_dapm_dai)
2899 /* ...find all widgets with the same stream and link them */
2900 list_for_each_entry(w, &card->widgets, list) {
2901 if (w->dapm != dai_w->dapm)
2904 if (w->id == snd_soc_dapm_dai)
2910 if (dai->driver->playback.stream_name &&
2912 dai->driver->playback.stream_name)) {
2913 r.source = dai->playback_widget->name;
2915 dev_dbg(dai->dev, "%s -> %s\n",
2918 snd_soc_dapm_add_route(w->dapm, &r);
2921 if (dai->driver->capture.stream_name &&
2923 dai->driver->capture.stream_name)) {
2925 r.sink = dai->capture_widget->name;
2926 dev_dbg(dai->dev, "%s -> %s\n",
2929 snd_soc_dapm_add_route(w->dapm, &r);
2937 static void soc_dapm_stream_event(struct snd_soc_dapm_context *dapm,
2938 int stream, struct snd_soc_dai *dai,
2941 struct snd_soc_dapm_widget *w;
2943 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
2944 w = dai->playback_widget;
2946 w = dai->capture_widget;
2951 dapm_mark_dirty(w, "stream event");
2954 case SND_SOC_DAPM_STREAM_START:
2957 case SND_SOC_DAPM_STREAM_STOP:
2960 case SND_SOC_DAPM_STREAM_SUSPEND:
2961 case SND_SOC_DAPM_STREAM_RESUME:
2962 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
2963 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
2967 dapm_power_widgets(dapm, event);
2971 * snd_soc_dapm_stream_event - send a stream event to the dapm core
2972 * @rtd: PCM runtime data
2973 * @stream: stream name
2974 * @event: stream event
2976 * Sends a stream event to the dapm core. The core then makes any
2977 * necessary widget power changes.
2979 * Returns 0 for success else error.
2981 int snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
2982 struct snd_soc_dai *dai, int event)
2984 struct snd_soc_codec *codec = rtd->codec;
2986 mutex_lock(&codec->mutex);
2987 soc_dapm_stream_event(&codec->dapm, stream, dai, event);
2988 mutex_unlock(&codec->mutex);
2993 * snd_soc_dapm_enable_pin - enable pin.
2994 * @dapm: DAPM context
2997 * Enables input/output pin and its parents or children widgets iff there is
2998 * a valid audio route and active audio stream.
2999 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3000 * do any widget power switching.
3002 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
3004 return snd_soc_dapm_set_pin(dapm, pin, 1);
3006 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
3009 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
3010 * @dapm: DAPM context
3013 * Enables input/output pin regardless of any other state. This is
3014 * intended for use with microphone bias supplies used in microphone
3017 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3018 * do any widget power switching.
3020 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
3023 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
3026 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
3030 dev_dbg(w->dapm->dev, "dapm: force enable pin %s\n", pin);
3033 dapm_mark_dirty(w, "force enable");
3037 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
3040 * snd_soc_dapm_disable_pin - disable pin.
3041 * @dapm: DAPM context
3044 * Disables input/output pin and its parents or children widgets.
3045 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3046 * do any widget power switching.
3048 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
3051 return snd_soc_dapm_set_pin(dapm, pin, 0);
3053 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
3056 * snd_soc_dapm_nc_pin - permanently disable pin.
3057 * @dapm: DAPM context
3060 * Marks the specified pin as being not connected, disabling it along
3061 * any parent or child widgets. At present this is identical to
3062 * snd_soc_dapm_disable_pin() but in future it will be extended to do
3063 * additional things such as disabling controls which only affect
3064 * paths through the pin.
3066 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3067 * do any widget power switching.
3069 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
3071 return snd_soc_dapm_set_pin(dapm, pin, 0);
3073 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
3076 * snd_soc_dapm_get_pin_status - get audio pin status
3077 * @dapm: DAPM context
3078 * @pin: audio signal pin endpoint (or start point)
3080 * Get audio pin status - connected or disconnected.
3082 * Returns 1 for connected otherwise 0.
3084 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
3087 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
3090 return w->connected;
3094 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
3097 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
3098 * @dapm: DAPM context
3099 * @pin: audio signal pin endpoint (or start point)
3101 * Mark the given endpoint or pin as ignoring suspend. When the
3102 * system is disabled a path between two endpoints flagged as ignoring
3103 * suspend will not be disabled. The path must already be enabled via
3104 * normal means at suspend time, it will not be turned on if it was not
3107 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
3110 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
3113 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
3117 w->ignore_suspend = 1;
3121 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
3123 static bool snd_soc_dapm_widget_in_card_paths(struct snd_soc_card *card,
3124 struct snd_soc_dapm_widget *w)
3126 struct snd_soc_dapm_path *p;
3128 list_for_each_entry(p, &card->paths, list) {
3129 if ((p->source == w) || (p->sink == w)) {
3131 "... Path %s(id:%d dapm:%p) - %s(id:%d dapm:%p)\n",
3132 p->source->name, p->source->id, p->source->dapm,
3133 p->sink->name, p->sink->id, p->sink->dapm);
3135 /* Connected to something other than the codec */
3136 if (p->source->dapm != p->sink->dapm)
3139 * Loopback connection from codec external pin to
3140 * codec external pin
3142 if (p->sink->id == snd_soc_dapm_input) {
3143 switch (p->source->id) {
3144 case snd_soc_dapm_output:
3145 case snd_soc_dapm_micbias:
3158 * snd_soc_dapm_auto_nc_codec_pins - call snd_soc_dapm_nc_pin for unused pins
3159 * @codec: The codec whose pins should be processed
3161 * Automatically call snd_soc_dapm_nc_pin() for any external pins in the codec
3162 * which are unused. Pins are used if they are connected externally to the
3163 * codec, whether that be to some other device, or a loop-back connection to
3166 void snd_soc_dapm_auto_nc_codec_pins(struct snd_soc_codec *codec)
3168 struct snd_soc_card *card = codec->card;
3169 struct snd_soc_dapm_context *dapm = &codec->dapm;
3170 struct snd_soc_dapm_widget *w;
3172 dev_dbg(codec->dev, "Auto NC: DAPMs: card:%p codec:%p\n",
3173 &card->dapm, &codec->dapm);
3175 list_for_each_entry(w, &card->widgets, list) {
3176 if (w->dapm != dapm)
3179 case snd_soc_dapm_input:
3180 case snd_soc_dapm_output:
3181 case snd_soc_dapm_micbias:
3182 dev_dbg(codec->dev, "Auto NC: Checking widget %s\n",
3184 if (!snd_soc_dapm_widget_in_card_paths(card, w)) {
3186 "... Not in map; disabling\n");
3187 snd_soc_dapm_nc_pin(dapm, w->name);
3197 * snd_soc_dapm_free - free dapm resources
3198 * @dapm: DAPM context
3200 * Free all dapm widgets and resources.
3202 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
3204 snd_soc_dapm_sys_remove(dapm->dev);
3205 dapm_debugfs_cleanup(dapm);
3206 dapm_free_widgets(dapm);
3207 list_del(&dapm->list);
3209 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
3211 static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context *dapm)
3213 struct snd_soc_dapm_widget *w;
3214 LIST_HEAD(down_list);
3217 list_for_each_entry(w, &dapm->card->widgets, list) {
3218 if (w->dapm != dapm)
3221 dapm_seq_insert(w, &down_list, false);
3227 /* If there were no widgets to power down we're already in
3231 if (dapm->bias_level == SND_SOC_BIAS_ON)
3232 snd_soc_dapm_set_bias_level(dapm,
3233 SND_SOC_BIAS_PREPARE);
3234 dapm_seq_run(dapm, &down_list, 0, false);
3235 if (dapm->bias_level == SND_SOC_BIAS_PREPARE)
3236 snd_soc_dapm_set_bias_level(dapm,
3237 SND_SOC_BIAS_STANDBY);
3242 * snd_soc_dapm_shutdown - callback for system shutdown
3244 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
3246 struct snd_soc_codec *codec;
3248 list_for_each_entry(codec, &card->codec_dev_list, list) {
3249 soc_dapm_shutdown_codec(&codec->dapm);
3250 if (codec->dapm.bias_level == SND_SOC_BIAS_STANDBY)
3251 snd_soc_dapm_set_bias_level(&codec->dapm,
3256 /* Module information */
3257 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3258 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
3259 MODULE_LICENSE("GPL");