2 * soc-dapm.c -- ALSA SoC Dynamic Audio Power Management
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
13 * o Changes power status of internal codec blocks depending on the
14 * dynamic configuration of codec internal audio paths and active
16 * o Platform power domain - can support external components i.e. amps and
17 * mic/headphone insertion events.
18 * o Automatic Mic Bias support
19 * o Jack insertion power event initiation - e.g. hp insertion will enable
21 * o Delayed power down of audio subsystem to reduce pops between a quick
26 #include <linux/module.h>
27 #include <linux/moduleparam.h>
28 #include <linux/init.h>
29 #include <linux/async.h>
30 #include <linux/delay.h>
32 #include <linux/bitops.h>
33 #include <linux/platform_device.h>
34 #include <linux/jiffies.h>
35 #include <linux/debugfs.h>
36 #include <linux/pm_runtime.h>
37 #include <linux/regulator/consumer.h>
38 #include <linux/clk.h>
39 #include <linux/slab.h>
40 #include <sound/core.h>
41 #include <sound/pcm.h>
42 #include <sound/pcm_params.h>
43 #include <sound/soc.h>
44 #include <sound/initval.h>
46 #include <trace/events/asoc.h>
48 #define DAPM_UPDATE_STAT(widget, val) widget->dapm->card->dapm_stats.val++;
50 /* dapm power sequences - make this per codec in the future */
51 static int dapm_up_seq[] = {
52 [snd_soc_dapm_pre] = 0,
53 [snd_soc_dapm_supply] = 1,
54 [snd_soc_dapm_regulator_supply] = 1,
55 [snd_soc_dapm_clock_supply] = 1,
56 [snd_soc_dapm_micbias] = 2,
57 [snd_soc_dapm_dai_link] = 2,
58 [snd_soc_dapm_dai_in] = 3,
59 [snd_soc_dapm_dai_out] = 3,
60 [snd_soc_dapm_aif_in] = 3,
61 [snd_soc_dapm_aif_out] = 3,
62 [snd_soc_dapm_mic] = 4,
63 [snd_soc_dapm_mux] = 5,
64 [snd_soc_dapm_virt_mux] = 5,
65 [snd_soc_dapm_value_mux] = 5,
66 [snd_soc_dapm_dac] = 6,
67 [snd_soc_dapm_switch] = 7,
68 [snd_soc_dapm_mixer] = 7,
69 [snd_soc_dapm_mixer_named_ctl] = 7,
70 [snd_soc_dapm_pga] = 8,
71 [snd_soc_dapm_adc] = 9,
72 [snd_soc_dapm_out_drv] = 10,
73 [snd_soc_dapm_hp] = 10,
74 [snd_soc_dapm_spk] = 10,
75 [snd_soc_dapm_line] = 10,
76 [snd_soc_dapm_post] = 11,
79 static int dapm_down_seq[] = {
80 [snd_soc_dapm_pre] = 0,
81 [snd_soc_dapm_adc] = 1,
82 [snd_soc_dapm_hp] = 2,
83 [snd_soc_dapm_spk] = 2,
84 [snd_soc_dapm_line] = 2,
85 [snd_soc_dapm_out_drv] = 2,
86 [snd_soc_dapm_pga] = 4,
87 [snd_soc_dapm_switch] = 5,
88 [snd_soc_dapm_mixer_named_ctl] = 5,
89 [snd_soc_dapm_mixer] = 5,
90 [snd_soc_dapm_dac] = 6,
91 [snd_soc_dapm_mic] = 7,
92 [snd_soc_dapm_micbias] = 8,
93 [snd_soc_dapm_mux] = 9,
94 [snd_soc_dapm_virt_mux] = 9,
95 [snd_soc_dapm_value_mux] = 9,
96 [snd_soc_dapm_aif_in] = 10,
97 [snd_soc_dapm_aif_out] = 10,
98 [snd_soc_dapm_dai_in] = 10,
99 [snd_soc_dapm_dai_out] = 10,
100 [snd_soc_dapm_dai_link] = 11,
101 [snd_soc_dapm_clock_supply] = 12,
102 [snd_soc_dapm_regulator_supply] = 12,
103 [snd_soc_dapm_supply] = 12,
104 [snd_soc_dapm_post] = 13,
107 static void pop_wait(u32 pop_time)
110 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
113 static void pop_dbg(struct device *dev, u32 pop_time, const char *fmt, ...)
121 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
126 vsnprintf(buf, PAGE_SIZE, fmt, args);
127 dev_info(dev, "%s", buf);
133 static bool dapm_dirty_widget(struct snd_soc_dapm_widget *w)
135 return !list_empty(&w->dirty);
138 void dapm_mark_dirty(struct snd_soc_dapm_widget *w, const char *reason)
140 if (!dapm_dirty_widget(w)) {
141 dev_vdbg(w->dapm->dev, "Marking %s dirty due to %s\n",
143 list_add_tail(&w->dirty, &w->dapm->card->dapm_dirty);
146 EXPORT_SYMBOL_GPL(dapm_mark_dirty);
148 void dapm_mark_io_dirty(struct snd_soc_dapm_context *dapm)
150 struct snd_soc_card *card = dapm->card;
151 struct snd_soc_dapm_widget *w;
153 mutex_lock(&card->dapm_mutex);
155 list_for_each_entry(w, &card->widgets, list) {
157 case snd_soc_dapm_input:
158 case snd_soc_dapm_output:
159 dapm_mark_dirty(w, "Rechecking inputs and outputs");
166 mutex_unlock(&card->dapm_mutex);
168 EXPORT_SYMBOL_GPL(dapm_mark_io_dirty);
170 /* create a new dapm widget */
171 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
172 const struct snd_soc_dapm_widget *_widget)
174 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
177 /* get snd_card from DAPM context */
178 static inline struct snd_card *dapm_get_snd_card(
179 struct snd_soc_dapm_context *dapm)
182 return dapm->codec->card->snd_card;
183 else if (dapm->platform)
184 return dapm->platform->card->snd_card;
192 /* get soc_card from DAPM context */
193 static inline struct snd_soc_card *dapm_get_soc_card(
194 struct snd_soc_dapm_context *dapm)
197 return dapm->codec->card;
198 else if (dapm->platform)
199 return dapm->platform->card;
207 static void dapm_reset(struct snd_soc_card *card)
209 struct snd_soc_dapm_widget *w;
211 memset(&card->dapm_stats, 0, sizeof(card->dapm_stats));
213 list_for_each_entry(w, &card->widgets, list) {
214 w->power_checked = false;
220 static int soc_widget_read(struct snd_soc_dapm_widget *w, int reg)
223 return snd_soc_read(w->codec, reg);
224 else if (w->platform)
225 return snd_soc_platform_read(w->platform, reg);
227 dev_err(w->dapm->dev, "ASoC: no valid widget read method\n");
231 static int soc_widget_write(struct snd_soc_dapm_widget *w, int reg, int val)
234 return snd_soc_write(w->codec, reg, val);
235 else if (w->platform)
236 return snd_soc_platform_write(w->platform, reg, val);
238 dev_err(w->dapm->dev, "ASoC: no valid widget write method\n");
242 static inline void soc_widget_lock(struct snd_soc_dapm_widget *w)
244 if (w->codec && !w->codec->using_regmap)
245 mutex_lock(&w->codec->mutex);
246 else if (w->platform)
247 mutex_lock(&w->platform->mutex);
250 static inline void soc_widget_unlock(struct snd_soc_dapm_widget *w)
252 if (w->codec && !w->codec->using_regmap)
253 mutex_unlock(&w->codec->mutex);
254 else if (w->platform)
255 mutex_unlock(&w->platform->mutex);
258 static int soc_widget_update_bits_locked(struct snd_soc_dapm_widget *w,
259 unsigned short reg, unsigned int mask, unsigned int value)
262 unsigned int old, new;
265 if (w->codec && w->codec->using_regmap) {
266 ret = regmap_update_bits_check(w->codec->control_data,
267 reg, mask, value, &change);
272 ret = soc_widget_read(w, reg);
274 soc_widget_unlock(w);
279 new = (old & ~mask) | (value & mask);
282 ret = soc_widget_write(w, reg, new);
284 soc_widget_unlock(w);
288 soc_widget_unlock(w);
295 * snd_soc_dapm_set_bias_level - set the bias level for the system
296 * @dapm: DAPM context
297 * @level: level to configure
299 * Configure the bias (power) levels for the SoC audio device.
301 * Returns 0 for success else error.
303 static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm,
304 enum snd_soc_bias_level level)
306 struct snd_soc_card *card = dapm->card;
309 trace_snd_soc_bias_level_start(card, level);
311 if (card && card->set_bias_level)
312 ret = card->set_bias_level(card, dapm, level);
317 if (dapm->codec->driver->set_bias_level)
318 ret = dapm->codec->driver->set_bias_level(dapm->codec,
321 dapm->bias_level = level;
322 } else if (!card || dapm != &card->dapm) {
323 dapm->bias_level = level;
329 if (card && card->set_bias_level_post)
330 ret = card->set_bias_level_post(card, dapm, level);
332 trace_snd_soc_bias_level_done(card, level);
337 /* set up initial codec paths */
338 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
339 struct snd_soc_dapm_path *p, int i)
342 case snd_soc_dapm_switch:
343 case snd_soc_dapm_mixer:
344 case snd_soc_dapm_mixer_named_ctl: {
346 struct soc_mixer_control *mc = (struct soc_mixer_control *)
347 w->kcontrol_news[i].private_value;
348 unsigned int reg = mc->reg;
349 unsigned int shift = mc->shift;
351 unsigned int mask = (1 << fls(max)) - 1;
352 unsigned int invert = mc->invert;
354 val = soc_widget_read(w, reg);
355 val = (val >> shift) & mask;
362 case snd_soc_dapm_mux: {
363 struct soc_enum *e = (struct soc_enum *)
364 w->kcontrol_news[i].private_value;
367 val = soc_widget_read(w, e->reg);
368 item = (val >> e->shift_l) & e->mask;
370 if (item < e->max && !strcmp(p->name, e->texts[item]))
376 case snd_soc_dapm_virt_mux: {
377 struct soc_enum *e = (struct soc_enum *)
378 w->kcontrol_news[i].private_value;
381 /* since a virtual mux has no backing registers to
382 * decide which path to connect, it will try to match
383 * with the first enumeration. This is to ensure
384 * that the default mux choice (the first) will be
385 * correctly powered up during initialization.
387 if (!strcmp(p->name, e->texts[0]))
391 case snd_soc_dapm_value_mux: {
392 struct soc_enum *e = (struct soc_enum *)
393 w->kcontrol_news[i].private_value;
396 val = soc_widget_read(w, e->reg);
397 val = (val >> e->shift_l) & e->mask;
398 for (item = 0; item < e->max; item++) {
399 if (val == e->values[item])
403 if (item < e->max && !strcmp(p->name, e->texts[item]))
409 /* does not affect routing - always connected */
410 case snd_soc_dapm_pga:
411 case snd_soc_dapm_out_drv:
412 case snd_soc_dapm_output:
413 case snd_soc_dapm_adc:
414 case snd_soc_dapm_input:
415 case snd_soc_dapm_siggen:
416 case snd_soc_dapm_dac:
417 case snd_soc_dapm_micbias:
418 case snd_soc_dapm_vmid:
419 case snd_soc_dapm_supply:
420 case snd_soc_dapm_regulator_supply:
421 case snd_soc_dapm_clock_supply:
422 case snd_soc_dapm_aif_in:
423 case snd_soc_dapm_aif_out:
424 case snd_soc_dapm_dai_in:
425 case snd_soc_dapm_dai_out:
426 case snd_soc_dapm_hp:
427 case snd_soc_dapm_mic:
428 case snd_soc_dapm_spk:
429 case snd_soc_dapm_line:
430 case snd_soc_dapm_dai_link:
433 /* does affect routing - dynamically connected */
434 case snd_soc_dapm_pre:
435 case snd_soc_dapm_post:
441 /* connect mux widget to its interconnecting audio paths */
442 static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
443 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
444 struct snd_soc_dapm_path *path, const char *control_name,
445 const struct snd_kcontrol_new *kcontrol)
447 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
450 for (i = 0; i < e->max; i++) {
451 if (!(strcmp(control_name, e->texts[i]))) {
452 list_add(&path->list, &dapm->card->paths);
453 list_add(&path->list_sink, &dest->sources);
454 list_add(&path->list_source, &src->sinks);
455 path->name = (char*)e->texts[i];
456 dapm_set_path_status(dest, path, 0);
464 /* connect mixer widget to its interconnecting audio paths */
465 static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
466 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
467 struct snd_soc_dapm_path *path, const char *control_name)
471 /* search for mixer kcontrol */
472 for (i = 0; i < dest->num_kcontrols; i++) {
473 if (!strcmp(control_name, dest->kcontrol_news[i].name)) {
474 list_add(&path->list, &dapm->card->paths);
475 list_add(&path->list_sink, &dest->sources);
476 list_add(&path->list_source, &src->sinks);
477 path->name = dest->kcontrol_news[i].name;
478 dapm_set_path_status(dest, path, i);
485 static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm,
486 struct snd_soc_dapm_widget *kcontrolw,
487 const struct snd_kcontrol_new *kcontrol_new,
488 struct snd_kcontrol **kcontrol)
490 struct snd_soc_dapm_widget *w;
495 list_for_each_entry(w, &dapm->card->widgets, list) {
496 if (w == kcontrolw || w->dapm != kcontrolw->dapm)
498 for (i = 0; i < w->num_kcontrols; i++) {
499 if (&w->kcontrol_news[i] == kcontrol_new) {
501 *kcontrol = w->kcontrols[i];
510 static void dapm_kcontrol_free(struct snd_kcontrol *kctl)
512 kfree(kctl->private_data);
516 * Determine if a kcontrol is shared. If it is, look it up. If it isn't,
517 * create it. Either way, add the widget into the control's widget list
519 static int dapm_create_or_share_mixmux_kcontrol(struct snd_soc_dapm_widget *w,
520 int kci, struct snd_soc_dapm_path *path)
522 struct snd_soc_dapm_context *dapm = w->dapm;
523 struct snd_card *card = dapm->card->snd_card;
527 struct snd_kcontrol *kcontrol;
528 struct snd_soc_dapm_widget_list *wlist;
531 bool wname_in_long_name, kcname_in_long_name;
537 prefix = dapm->codec->name_prefix;
542 prefix_len = strlen(prefix) + 1;
546 shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[kci],
550 wlist = kcontrol->private_data;
551 wlistentries = wlist->num_widgets + 1;
557 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
558 wlistentries * sizeof(struct snd_soc_dapm_widget *);
559 wlist = krealloc(wlist, wlistsize, GFP_KERNEL);
561 dev_err(dapm->dev, "ASoC: can't allocate widget list for %s\n",
565 wlist->num_widgets = wlistentries;
566 wlist->widgets[wlistentries - 1] = w;
570 wname_in_long_name = false;
571 kcname_in_long_name = true;
574 case snd_soc_dapm_switch:
575 case snd_soc_dapm_mixer:
576 wname_in_long_name = true;
577 kcname_in_long_name = true;
579 case snd_soc_dapm_mixer_named_ctl:
580 wname_in_long_name = false;
581 kcname_in_long_name = true;
583 case snd_soc_dapm_mux:
584 case snd_soc_dapm_virt_mux:
585 case snd_soc_dapm_value_mux:
586 wname_in_long_name = true;
587 kcname_in_long_name = false;
595 if (wname_in_long_name && kcname_in_long_name) {
597 * The control will get a prefix from the control
598 * creation process but we're also using the same
599 * prefix for widgets so cut the prefix off the
600 * front of the widget name.
602 long_name = kasprintf(GFP_KERNEL, "%s %s",
603 w->name + prefix_len,
604 w->kcontrol_news[kci].name);
605 if (long_name == NULL) {
611 } else if (wname_in_long_name) {
613 name = w->name + prefix_len;
616 name = w->kcontrol_news[kci].name;
619 kcontrol = snd_soc_cnew(&w->kcontrol_news[kci], wlist, name,
621 kcontrol->private_free = dapm_kcontrol_free;
623 ret = snd_ctl_add(card, kcontrol);
626 "ASoC: failed to add widget %s dapm kcontrol %s: %d\n",
633 kcontrol->private_data = wlist;
634 w->kcontrols[kci] = kcontrol;
635 path->kcontrol = kcontrol;
640 /* create new dapm mixer control */
641 static int dapm_new_mixer(struct snd_soc_dapm_widget *w)
644 struct snd_soc_dapm_path *path;
647 for (i = 0; i < w->num_kcontrols; i++) {
649 list_for_each_entry(path, &w->sources, list_sink) {
650 /* mixer/mux paths name must match control name */
651 if (path->name != (char *)w->kcontrol_news[i].name)
654 if (w->kcontrols[i]) {
655 path->kcontrol = w->kcontrols[i];
659 ret = dapm_create_or_share_mixmux_kcontrol(w, i, path);
668 /* create new dapm mux control */
669 static int dapm_new_mux(struct snd_soc_dapm_widget *w)
671 struct snd_soc_dapm_context *dapm = w->dapm;
672 struct snd_soc_dapm_path *path;
675 if (w->num_kcontrols != 1) {
677 "ASoC: mux %s has incorrect number of controls\n",
682 path = list_first_entry(&w->sources, struct snd_soc_dapm_path,
685 dev_err(dapm->dev, "ASoC: mux %s has no paths\n", w->name);
689 ret = dapm_create_or_share_mixmux_kcontrol(w, 0, path);
693 list_for_each_entry(path, &w->sources, list_sink)
694 path->kcontrol = w->kcontrols[0];
699 /* create new dapm volume control */
700 static int dapm_new_pga(struct snd_soc_dapm_widget *w)
702 if (w->num_kcontrols)
703 dev_err(w->dapm->dev,
704 "ASoC: PGA controls not supported: '%s'\n", w->name);
709 /* reset 'walked' bit for each dapm path */
710 static void dapm_clear_walk_output(struct snd_soc_dapm_context *dapm,
711 struct list_head *sink)
713 struct snd_soc_dapm_path *p;
715 list_for_each_entry(p, sink, list_source) {
718 dapm_clear_walk_output(dapm, &p->sink->sinks);
723 static void dapm_clear_walk_input(struct snd_soc_dapm_context *dapm,
724 struct list_head *source)
726 struct snd_soc_dapm_path *p;
728 list_for_each_entry(p, source, list_sink) {
731 dapm_clear_walk_input(dapm, &p->source->sources);
737 /* We implement power down on suspend by checking the power state of
738 * the ALSA card - when we are suspending the ALSA state for the card
741 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
743 int level = snd_power_get_state(widget->dapm->card->snd_card);
746 case SNDRV_CTL_POWER_D3hot:
747 case SNDRV_CTL_POWER_D3cold:
748 if (widget->ignore_suspend)
749 dev_dbg(widget->dapm->dev, "ASoC: %s ignoring suspend\n",
751 return widget->ignore_suspend;
757 /* add widget to list if it's not already in the list */
758 static int dapm_list_add_widget(struct snd_soc_dapm_widget_list **list,
759 struct snd_soc_dapm_widget *w)
761 struct snd_soc_dapm_widget_list *wlist;
762 int wlistsize, wlistentries, i;
769 /* is this widget already in the list */
770 for (i = 0; i < wlist->num_widgets; i++) {
771 if (wlist->widgets[i] == w)
775 /* allocate some new space */
776 wlistentries = wlist->num_widgets + 1;
777 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
778 wlistentries * sizeof(struct snd_soc_dapm_widget *);
779 *list = krealloc(wlist, wlistsize, GFP_KERNEL);
781 dev_err(w->dapm->dev, "ASoC: can't allocate widget list for %s\n",
787 /* insert the widget */
788 dev_dbg(w->dapm->dev, "ASoC: added %s in widget list pos %d\n",
789 w->name, wlist->num_widgets);
791 wlist->widgets[wlist->num_widgets] = w;
792 wlist->num_widgets++;
797 * Recursively check for a completed path to an active or physically connected
798 * output widget. Returns number of complete paths.
800 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget,
801 struct snd_soc_dapm_widget_list **list)
803 struct snd_soc_dapm_path *path;
806 if (widget->outputs >= 0)
807 return widget->outputs;
809 DAPM_UPDATE_STAT(widget, path_checks);
811 switch (widget->id) {
812 case snd_soc_dapm_supply:
813 case snd_soc_dapm_regulator_supply:
814 case snd_soc_dapm_clock_supply:
820 switch (widget->id) {
821 case snd_soc_dapm_adc:
822 case snd_soc_dapm_aif_out:
823 case snd_soc_dapm_dai_out:
824 if (widget->active) {
825 widget->outputs = snd_soc_dapm_suspend_check(widget);
826 return widget->outputs;
832 if (widget->connected) {
833 /* connected pin ? */
834 if (widget->id == snd_soc_dapm_output && !widget->ext) {
835 widget->outputs = snd_soc_dapm_suspend_check(widget);
836 return widget->outputs;
839 /* connected jack or spk ? */
840 if (widget->id == snd_soc_dapm_hp ||
841 widget->id == snd_soc_dapm_spk ||
842 (widget->id == snd_soc_dapm_line &&
843 !list_empty(&widget->sources))) {
844 widget->outputs = snd_soc_dapm_suspend_check(widget);
845 return widget->outputs;
849 list_for_each_entry(path, &widget->sinks, list_source) {
850 DAPM_UPDATE_STAT(widget, neighbour_checks);
861 trace_snd_soc_dapm_output_path(widget, path);
863 if (path->sink && path->connect) {
867 /* do we need to add this widget to the list ? */
870 err = dapm_list_add_widget(list, path->sink);
872 dev_err(widget->dapm->dev,
873 "ASoC: could not add widget %s\n",
880 con += is_connected_output_ep(path->sink, list);
886 widget->outputs = con;
892 * Recursively check for a completed path to an active or physically connected
893 * input widget. Returns number of complete paths.
895 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget,
896 struct snd_soc_dapm_widget_list **list)
898 struct snd_soc_dapm_path *path;
901 if (widget->inputs >= 0)
902 return widget->inputs;
904 DAPM_UPDATE_STAT(widget, path_checks);
906 switch (widget->id) {
907 case snd_soc_dapm_supply:
908 case snd_soc_dapm_regulator_supply:
909 case snd_soc_dapm_clock_supply:
915 /* active stream ? */
916 switch (widget->id) {
917 case snd_soc_dapm_dac:
918 case snd_soc_dapm_aif_in:
919 case snd_soc_dapm_dai_in:
920 if (widget->active) {
921 widget->inputs = snd_soc_dapm_suspend_check(widget);
922 return widget->inputs;
928 if (widget->connected) {
929 /* connected pin ? */
930 if (widget->id == snd_soc_dapm_input && !widget->ext) {
931 widget->inputs = snd_soc_dapm_suspend_check(widget);
932 return widget->inputs;
935 /* connected VMID/Bias for lower pops */
936 if (widget->id == snd_soc_dapm_vmid) {
937 widget->inputs = snd_soc_dapm_suspend_check(widget);
938 return widget->inputs;
941 /* connected jack ? */
942 if (widget->id == snd_soc_dapm_mic ||
943 (widget->id == snd_soc_dapm_line &&
944 !list_empty(&widget->sinks))) {
945 widget->inputs = snd_soc_dapm_suspend_check(widget);
946 return widget->inputs;
949 /* signal generator */
950 if (widget->id == snd_soc_dapm_siggen) {
951 widget->inputs = snd_soc_dapm_suspend_check(widget);
952 return widget->inputs;
956 list_for_each_entry(path, &widget->sources, list_sink) {
957 DAPM_UPDATE_STAT(widget, neighbour_checks);
968 trace_snd_soc_dapm_input_path(widget, path);
970 if (path->source && path->connect) {
974 /* do we need to add this widget to the list ? */
977 err = dapm_list_add_widget(list, path->source);
979 dev_err(widget->dapm->dev,
980 "ASoC: could not add widget %s\n",
987 con += is_connected_input_ep(path->source, list);
993 widget->inputs = con;
999 * snd_soc_dapm_get_connected_widgets - query audio path and it's widgets.
1000 * @dai: the soc DAI.
1001 * @stream: stream direction.
1002 * @list: list of active widgets for this stream.
1004 * Queries DAPM graph as to whether an valid audio stream path exists for
1005 * the initial stream specified by name. This takes into account
1006 * current mixer and mux kcontrol settings. Creates list of valid widgets.
1008 * Returns the number of valid paths or negative error.
1010 int snd_soc_dapm_dai_get_connected_widgets(struct snd_soc_dai *dai, int stream,
1011 struct snd_soc_dapm_widget_list **list)
1013 struct snd_soc_card *card = dai->card;
1016 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
1019 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1020 paths = is_connected_output_ep(dai->playback_widget, list);
1021 dapm_clear_walk_output(&card->dapm,
1022 &dai->playback_widget->sinks);
1024 paths = is_connected_input_ep(dai->capture_widget, list);
1025 dapm_clear_walk_input(&card->dapm,
1026 &dai->capture_widget->sources);
1029 trace_snd_soc_dapm_connected(paths, stream);
1030 mutex_unlock(&card->dapm_mutex);
1036 * Handler for generic register modifier widget.
1038 int dapm_reg_event(struct snd_soc_dapm_widget *w,
1039 struct snd_kcontrol *kcontrol, int event)
1043 if (SND_SOC_DAPM_EVENT_ON(event))
1048 soc_widget_update_bits_locked(w, -(w->reg + 1),
1049 w->mask << w->shift, val << w->shift);
1053 EXPORT_SYMBOL_GPL(dapm_reg_event);
1056 * Handler for regulator supply widget.
1058 int dapm_regulator_event(struct snd_soc_dapm_widget *w,
1059 struct snd_kcontrol *kcontrol, int event)
1063 if (SND_SOC_DAPM_EVENT_ON(event)) {
1064 if (w->invert & SND_SOC_DAPM_REGULATOR_BYPASS) {
1065 ret = regulator_allow_bypass(w->regulator, false);
1067 dev_warn(w->dapm->dev,
1068 "ASoC: Failed to bypass %s: %d\n",
1072 return regulator_enable(w->regulator);
1074 if (w->invert & SND_SOC_DAPM_REGULATOR_BYPASS) {
1075 ret = regulator_allow_bypass(w->regulator, true);
1077 dev_warn(w->dapm->dev,
1078 "ASoC: Failed to unbypass %s: %d\n",
1082 return regulator_disable_deferred(w->regulator, w->shift);
1085 EXPORT_SYMBOL_GPL(dapm_regulator_event);
1088 * Handler for clock supply widget.
1090 int dapm_clock_event(struct snd_soc_dapm_widget *w,
1091 struct snd_kcontrol *kcontrol, int event)
1096 #ifdef CONFIG_HAVE_CLK
1097 if (SND_SOC_DAPM_EVENT_ON(event)) {
1098 return clk_prepare_enable(w->clk);
1100 clk_disable_unprepare(w->clk);
1106 EXPORT_SYMBOL_GPL(dapm_clock_event);
1108 static int dapm_widget_power_check(struct snd_soc_dapm_widget *w)
1110 if (w->power_checked)
1111 return w->new_power;
1116 w->new_power = w->power_check(w);
1118 w->power_checked = true;
1120 return w->new_power;
1123 /* Generic check to see if a widget should be powered.
1125 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
1129 DAPM_UPDATE_STAT(w, power_checks);
1131 in = is_connected_input_ep(w, NULL);
1132 dapm_clear_walk_input(w->dapm, &w->sources);
1133 out = is_connected_output_ep(w, NULL);
1134 dapm_clear_walk_output(w->dapm, &w->sinks);
1135 return out != 0 && in != 0;
1138 /* Check to see if an ADC has power */
1139 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
1143 DAPM_UPDATE_STAT(w, power_checks);
1146 in = is_connected_input_ep(w, NULL);
1147 dapm_clear_walk_input(w->dapm, &w->sources);
1150 return dapm_generic_check_power(w);
1154 /* Check to see if a DAC has power */
1155 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
1159 DAPM_UPDATE_STAT(w, power_checks);
1162 out = is_connected_output_ep(w, NULL);
1163 dapm_clear_walk_output(w->dapm, &w->sinks);
1166 return dapm_generic_check_power(w);
1170 /* Check to see if a power supply is needed */
1171 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
1173 struct snd_soc_dapm_path *path;
1175 DAPM_UPDATE_STAT(w, power_checks);
1177 /* Check if one of our outputs is connected */
1178 list_for_each_entry(path, &w->sinks, list_source) {
1179 DAPM_UPDATE_STAT(w, neighbour_checks);
1184 if (path->connected &&
1185 !path->connected(path->source, path->sink))
1191 if (dapm_widget_power_check(path->sink))
1198 static int dapm_always_on_check_power(struct snd_soc_dapm_widget *w)
1203 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
1204 struct snd_soc_dapm_widget *b,
1212 sort = dapm_down_seq;
1214 if (sort[a->id] != sort[b->id])
1215 return sort[a->id] - sort[b->id];
1216 if (a->subseq != b->subseq) {
1218 return a->subseq - b->subseq;
1220 return b->subseq - a->subseq;
1222 if (a->reg != b->reg)
1223 return a->reg - b->reg;
1224 if (a->dapm != b->dapm)
1225 return (unsigned long)a->dapm - (unsigned long)b->dapm;
1230 /* Insert a widget in order into a DAPM power sequence. */
1231 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
1232 struct list_head *list,
1235 struct snd_soc_dapm_widget *w;
1237 list_for_each_entry(w, list, power_list)
1238 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
1239 list_add_tail(&new_widget->power_list, &w->power_list);
1243 list_add_tail(&new_widget->power_list, list);
1246 static void dapm_seq_check_event(struct snd_soc_dapm_context *dapm,
1247 struct snd_soc_dapm_widget *w, int event)
1249 struct snd_soc_card *card = dapm->card;
1250 const char *ev_name;
1254 case SND_SOC_DAPM_PRE_PMU:
1255 ev_name = "PRE_PMU";
1258 case SND_SOC_DAPM_POST_PMU:
1259 ev_name = "POST_PMU";
1262 case SND_SOC_DAPM_PRE_PMD:
1263 ev_name = "PRE_PMD";
1266 case SND_SOC_DAPM_POST_PMD:
1267 ev_name = "POST_PMD";
1270 case SND_SOC_DAPM_WILL_PMU:
1271 ev_name = "WILL_PMU";
1274 case SND_SOC_DAPM_WILL_PMD:
1275 ev_name = "WILL_PMD";
1283 if (w->power != power)
1286 if (w->event && (w->event_flags & event)) {
1287 pop_dbg(dapm->dev, card->pop_time, "pop test : %s %s\n",
1289 trace_snd_soc_dapm_widget_event_start(w, event);
1290 ret = w->event(w, NULL, event);
1291 trace_snd_soc_dapm_widget_event_done(w, event);
1293 dev_err(dapm->dev, "ASoC: %s: %s event failed: %d\n",
1294 ev_name, w->name, ret);
1298 /* Apply the coalesced changes from a DAPM sequence */
1299 static void dapm_seq_run_coalesced(struct snd_soc_dapm_context *dapm,
1300 struct list_head *pending)
1302 struct snd_soc_card *card = dapm->card;
1303 struct snd_soc_dapm_widget *w;
1305 unsigned int value = 0;
1306 unsigned int mask = 0;
1307 unsigned int cur_mask;
1309 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
1312 list_for_each_entry(w, pending, power_list) {
1313 cur_mask = 1 << w->shift;
1314 BUG_ON(reg != w->reg);
1325 pop_dbg(dapm->dev, card->pop_time,
1326 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
1327 w->name, reg, value, mask);
1329 /* Check for events */
1330 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMU);
1331 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMD);
1335 /* Any widget will do, they should all be updating the
1338 w = list_first_entry(pending, struct snd_soc_dapm_widget,
1341 pop_dbg(dapm->dev, card->pop_time,
1342 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
1343 value, mask, reg, card->pop_time);
1344 pop_wait(card->pop_time);
1345 soc_widget_update_bits_locked(w, reg, mask, value);
1348 list_for_each_entry(w, pending, power_list) {
1349 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMU);
1350 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMD);
1354 /* Apply a DAPM power sequence.
1356 * We walk over a pre-sorted list of widgets to apply power to. In
1357 * order to minimise the number of writes to the device required
1358 * multiple widgets will be updated in a single write where possible.
1359 * Currently anything that requires more than a single write is not
1362 static void dapm_seq_run(struct snd_soc_dapm_context *dapm,
1363 struct list_head *list, int event, bool power_up)
1365 struct snd_soc_dapm_widget *w, *n;
1368 int cur_subseq = -1;
1369 int cur_reg = SND_SOC_NOPM;
1370 struct snd_soc_dapm_context *cur_dapm = NULL;
1377 sort = dapm_down_seq;
1379 list_for_each_entry_safe(w, n, list, power_list) {
1382 /* Do we need to apply any queued changes? */
1383 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
1384 w->dapm != cur_dapm || w->subseq != cur_subseq) {
1385 if (!list_empty(&pending))
1386 dapm_seq_run_coalesced(cur_dapm, &pending);
1388 if (cur_dapm && cur_dapm->seq_notifier) {
1389 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1390 if (sort[i] == cur_sort)
1391 cur_dapm->seq_notifier(cur_dapm,
1396 INIT_LIST_HEAD(&pending);
1398 cur_subseq = INT_MIN;
1399 cur_reg = SND_SOC_NOPM;
1404 case snd_soc_dapm_pre:
1406 list_for_each_entry_safe_continue(w, n, list,
1409 if (event == SND_SOC_DAPM_STREAM_START)
1411 NULL, SND_SOC_DAPM_PRE_PMU);
1412 else if (event == SND_SOC_DAPM_STREAM_STOP)
1414 NULL, SND_SOC_DAPM_PRE_PMD);
1417 case snd_soc_dapm_post:
1419 list_for_each_entry_safe_continue(w, n, list,
1422 if (event == SND_SOC_DAPM_STREAM_START)
1424 NULL, SND_SOC_DAPM_POST_PMU);
1425 else if (event == SND_SOC_DAPM_STREAM_STOP)
1427 NULL, SND_SOC_DAPM_POST_PMD);
1431 /* Queue it up for application */
1432 cur_sort = sort[w->id];
1433 cur_subseq = w->subseq;
1436 list_move(&w->power_list, &pending);
1441 dev_err(w->dapm->dev,
1442 "ASoC: Failed to apply widget power: %d\n", ret);
1445 if (!list_empty(&pending))
1446 dapm_seq_run_coalesced(cur_dapm, &pending);
1448 if (cur_dapm && cur_dapm->seq_notifier) {
1449 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1450 if (sort[i] == cur_sort)
1451 cur_dapm->seq_notifier(cur_dapm,
1456 static void dapm_widget_update(struct snd_soc_dapm_context *dapm)
1458 struct snd_soc_dapm_update *update = dapm->update;
1459 struct snd_soc_dapm_widget *w;
1468 (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
1469 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
1471 dev_err(dapm->dev, "ASoC: %s DAPM pre-event failed: %d\n",
1475 ret = soc_widget_update_bits_locked(w, update->reg, update->mask,
1478 dev_err(dapm->dev, "ASoC: %s DAPM update failed: %d\n",
1482 (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1483 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1485 dev_err(dapm->dev, "ASoC: %s DAPM post-event failed: %d\n",
1490 /* Async callback run prior to DAPM sequences - brings to _PREPARE if
1491 * they're changing state.
1493 static void dapm_pre_sequence_async(void *data, async_cookie_t cookie)
1495 struct snd_soc_dapm_context *d = data;
1498 /* If we're off and we're not supposed to be go into STANDBY */
1499 if (d->bias_level == SND_SOC_BIAS_OFF &&
1500 d->target_bias_level != SND_SOC_BIAS_OFF) {
1502 pm_runtime_get_sync(d->dev);
1504 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1507 "ASoC: Failed to turn on bias: %d\n", ret);
1510 /* Prepare for a STADDBY->ON or ON->STANDBY transition */
1511 if (d->bias_level != d->target_bias_level) {
1512 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);
1515 "ASoC: Failed to prepare bias: %d\n", ret);
1519 /* Async callback run prior to DAPM sequences - brings to their final
1522 static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
1524 struct snd_soc_dapm_context *d = data;
1527 /* If we just powered the last thing off drop to standby bias */
1528 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1529 (d->target_bias_level == SND_SOC_BIAS_STANDBY ||
1530 d->target_bias_level == SND_SOC_BIAS_OFF)) {
1531 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1533 dev_err(d->dev, "ASoC: Failed to apply standby bias: %d\n",
1537 /* If we're in standby and can support bias off then do that */
1538 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1539 d->target_bias_level == SND_SOC_BIAS_OFF) {
1540 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);
1542 dev_err(d->dev, "ASoC: Failed to turn off bias: %d\n",
1546 pm_runtime_put(d->dev);
1549 /* If we just powered up then move to active bias */
1550 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1551 d->target_bias_level == SND_SOC_BIAS_ON) {
1552 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);
1554 dev_err(d->dev, "ASoC: Failed to apply active bias: %d\n",
1559 static void dapm_widget_set_peer_power(struct snd_soc_dapm_widget *peer,
1560 bool power, bool connect)
1562 /* If a connection is being made or broken then that update
1563 * will have marked the peer dirty, otherwise the widgets are
1564 * not connected and this update has no impact. */
1568 /* If the peer is already in the state we're moving to then we
1569 * won't have an impact on it. */
1570 if (power != peer->power)
1571 dapm_mark_dirty(peer, "peer state change");
1574 static void dapm_widget_set_power(struct snd_soc_dapm_widget *w, bool power,
1575 struct list_head *up_list,
1576 struct list_head *down_list)
1578 struct snd_soc_dapm_path *path;
1580 if (w->power == power)
1583 trace_snd_soc_dapm_widget_power(w, power);
1585 /* If we changed our power state perhaps our neigbours changed
1588 list_for_each_entry(path, &w->sources, list_sink) {
1590 dapm_widget_set_peer_power(path->source, power,
1595 case snd_soc_dapm_supply:
1596 case snd_soc_dapm_regulator_supply:
1597 case snd_soc_dapm_clock_supply:
1598 /* Supplies can't affect their outputs, only their inputs */
1601 list_for_each_entry(path, &w->sinks, list_source) {
1603 dapm_widget_set_peer_power(path->sink, power,
1611 dapm_seq_insert(w, up_list, true);
1613 dapm_seq_insert(w, down_list, false);
1618 static void dapm_power_one_widget(struct snd_soc_dapm_widget *w,
1619 struct list_head *up_list,
1620 struct list_head *down_list)
1625 case snd_soc_dapm_pre:
1626 dapm_seq_insert(w, down_list, false);
1628 case snd_soc_dapm_post:
1629 dapm_seq_insert(w, up_list, true);
1633 power = dapm_widget_power_check(w);
1635 dapm_widget_set_power(w, power, up_list, down_list);
1641 * Scan each dapm widget for complete audio path.
1642 * A complete path is a route that has valid endpoints i.e.:-
1644 * o DAC to output pin.
1645 * o Input Pin to ADC.
1646 * o Input pin to Output pin (bypass, sidetone)
1647 * o DAC to ADC (loopback).
1649 static int dapm_power_widgets(struct snd_soc_dapm_context *dapm, int event)
1651 struct snd_soc_card *card = dapm->card;
1652 struct snd_soc_dapm_widget *w;
1653 struct snd_soc_dapm_context *d;
1655 LIST_HEAD(down_list);
1656 ASYNC_DOMAIN_EXCLUSIVE(async_domain);
1657 enum snd_soc_bias_level bias;
1659 trace_snd_soc_dapm_start(card);
1661 list_for_each_entry(d, &card->dapm_list, list) {
1662 if (d->idle_bias_off)
1663 d->target_bias_level = SND_SOC_BIAS_OFF;
1665 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1670 /* Check which widgets we need to power and store them in
1671 * lists indicating if they should be powered up or down. We
1672 * only check widgets that have been flagged as dirty but note
1673 * that new widgets may be added to the dirty list while we
1676 list_for_each_entry(w, &card->dapm_dirty, dirty) {
1677 dapm_power_one_widget(w, &up_list, &down_list);
1680 list_for_each_entry(w, &card->widgets, list) {
1682 case snd_soc_dapm_pre:
1683 case snd_soc_dapm_post:
1684 /* These widgets always need to be powered */
1687 list_del_init(&w->dirty);
1694 /* Supplies and micbiases only bring the
1695 * context up to STANDBY as unless something
1696 * else is active and passing audio they
1697 * generally don't require full power. Signal
1698 * generators are virtual pins and have no
1699 * power impact themselves.
1702 case snd_soc_dapm_siggen:
1704 case snd_soc_dapm_supply:
1705 case snd_soc_dapm_regulator_supply:
1706 case snd_soc_dapm_clock_supply:
1707 case snd_soc_dapm_micbias:
1708 if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
1709 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1712 d->target_bias_level = SND_SOC_BIAS_ON;
1719 /* Force all contexts in the card to the same bias state if
1720 * they're not ground referenced.
1722 bias = SND_SOC_BIAS_OFF;
1723 list_for_each_entry(d, &card->dapm_list, list)
1724 if (d->target_bias_level > bias)
1725 bias = d->target_bias_level;
1726 list_for_each_entry(d, &card->dapm_list, list)
1727 if (!d->idle_bias_off)
1728 d->target_bias_level = bias;
1730 trace_snd_soc_dapm_walk_done(card);
1732 /* Run all the bias changes in parallel */
1733 list_for_each_entry(d, &dapm->card->dapm_list, list)
1734 async_schedule_domain(dapm_pre_sequence_async, d,
1736 async_synchronize_full_domain(&async_domain);
1738 list_for_each_entry(w, &down_list, power_list) {
1739 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_WILL_PMD);
1742 list_for_each_entry(w, &up_list, power_list) {
1743 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_WILL_PMU);
1746 /* Power down widgets first; try to avoid amplifying pops. */
1747 dapm_seq_run(dapm, &down_list, event, false);
1749 dapm_widget_update(dapm);
1752 dapm_seq_run(dapm, &up_list, event, true);
1754 /* Run all the bias changes in parallel */
1755 list_for_each_entry(d, &dapm->card->dapm_list, list)
1756 async_schedule_domain(dapm_post_sequence_async, d,
1758 async_synchronize_full_domain(&async_domain);
1760 /* do we need to notify any clients that DAPM event is complete */
1761 list_for_each_entry(d, &card->dapm_list, list) {
1762 if (d->stream_event)
1763 d->stream_event(d, event);
1766 pop_dbg(dapm->dev, card->pop_time,
1767 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
1768 pop_wait(card->pop_time);
1770 trace_snd_soc_dapm_done(card);
1775 #ifdef CONFIG_DEBUG_FS
1776 static ssize_t dapm_widget_power_read_file(struct file *file,
1777 char __user *user_buf,
1778 size_t count, loff_t *ppos)
1780 struct snd_soc_dapm_widget *w = file->private_data;
1784 struct snd_soc_dapm_path *p = NULL;
1786 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1790 in = is_connected_input_ep(w, NULL);
1791 dapm_clear_walk_input(w->dapm, &w->sources);
1792 out = is_connected_output_ep(w, NULL);
1793 dapm_clear_walk_output(w->dapm, &w->sinks);
1795 ret = snprintf(buf, PAGE_SIZE, "%s: %s%s in %d out %d",
1796 w->name, w->power ? "On" : "Off",
1797 w->force ? " (forced)" : "", in, out);
1800 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1801 " - R%d(0x%x) bit %d",
1802 w->reg, w->reg, w->shift);
1804 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1807 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1809 w->active ? "active" : "inactive");
1811 list_for_each_entry(p, &w->sources, list_sink) {
1812 if (p->connected && !p->connected(w, p->sink))
1816 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1817 " in \"%s\" \"%s\"\n",
1818 p->name ? p->name : "static",
1821 list_for_each_entry(p, &w->sinks, list_source) {
1822 if (p->connected && !p->connected(w, p->sink))
1826 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1827 " out \"%s\" \"%s\"\n",
1828 p->name ? p->name : "static",
1832 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1838 static const struct file_operations dapm_widget_power_fops = {
1839 .open = simple_open,
1840 .read = dapm_widget_power_read_file,
1841 .llseek = default_llseek,
1844 static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
1845 size_t count, loff_t *ppos)
1847 struct snd_soc_dapm_context *dapm = file->private_data;
1850 switch (dapm->bias_level) {
1851 case SND_SOC_BIAS_ON:
1854 case SND_SOC_BIAS_PREPARE:
1855 level = "Prepare\n";
1857 case SND_SOC_BIAS_STANDBY:
1858 level = "Standby\n";
1860 case SND_SOC_BIAS_OFF:
1865 level = "Unknown\n";
1869 return simple_read_from_buffer(user_buf, count, ppos, level,
1873 static const struct file_operations dapm_bias_fops = {
1874 .open = simple_open,
1875 .read = dapm_bias_read_file,
1876 .llseek = default_llseek,
1879 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1880 struct dentry *parent)
1884 dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
1886 if (!dapm->debugfs_dapm) {
1888 "ASoC: Failed to create DAPM debugfs directory\n");
1892 d = debugfs_create_file("bias_level", 0444,
1893 dapm->debugfs_dapm, dapm,
1897 "ASoC: Failed to create bias level debugfs file\n");
1900 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1902 struct snd_soc_dapm_context *dapm = w->dapm;
1905 if (!dapm->debugfs_dapm || !w->name)
1908 d = debugfs_create_file(w->name, 0444,
1909 dapm->debugfs_dapm, w,
1910 &dapm_widget_power_fops);
1912 dev_warn(w->dapm->dev,
1913 "ASoC: Failed to create %s debugfs file\n",
1917 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1919 debugfs_remove_recursive(dapm->debugfs_dapm);
1923 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1924 struct dentry *parent)
1928 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1932 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1938 /* test and update the power status of a mux widget */
1939 static int soc_dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1940 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e)
1942 struct snd_soc_dapm_path *path;
1945 if (widget->id != snd_soc_dapm_mux &&
1946 widget->id != snd_soc_dapm_virt_mux &&
1947 widget->id != snd_soc_dapm_value_mux)
1950 /* find dapm widget path assoc with kcontrol */
1951 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1952 if (path->kcontrol != kcontrol)
1955 if (!path->name || !e->texts[mux])
1959 /* we now need to match the string in the enum to the path */
1960 if (!(strcmp(path->name, e->texts[mux]))) {
1961 path->connect = 1; /* new connection */
1962 dapm_mark_dirty(path->source, "mux connection");
1965 dapm_mark_dirty(path->source,
1966 "mux disconnection");
1967 path->connect = 0; /* old connection must be powered down */
1972 dapm_mark_dirty(widget, "mux change");
1973 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1979 int snd_soc_dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1980 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e)
1982 struct snd_soc_card *card = widget->dapm->card;
1985 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
1986 ret = soc_dapm_mux_update_power(widget, kcontrol, mux, e);
1987 mutex_unlock(&card->dapm_mutex);
1989 soc_dpcm_runtime_update(widget);
1992 EXPORT_SYMBOL_GPL(snd_soc_dapm_mux_update_power);
1994 /* test and update the power status of a mixer or switch widget */
1995 static int soc_dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1996 struct snd_kcontrol *kcontrol, int connect)
1998 struct snd_soc_dapm_path *path;
2001 if (widget->id != snd_soc_dapm_mixer &&
2002 widget->id != snd_soc_dapm_mixer_named_ctl &&
2003 widget->id != snd_soc_dapm_switch)
2006 /* find dapm widget path assoc with kcontrol */
2007 list_for_each_entry(path, &widget->dapm->card->paths, list) {
2008 if (path->kcontrol != kcontrol)
2011 /* found, now check type */
2013 path->connect = connect;
2014 dapm_mark_dirty(path->source, "mixer connection");
2018 dapm_mark_dirty(widget, "mixer update");
2019 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
2025 int snd_soc_dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
2026 struct snd_kcontrol *kcontrol, int connect)
2028 struct snd_soc_card *card = widget->dapm->card;
2031 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2032 ret = soc_dapm_mixer_update_power(widget, kcontrol, connect);
2033 mutex_unlock(&card->dapm_mutex);
2035 soc_dpcm_runtime_update(widget);
2038 EXPORT_SYMBOL_GPL(snd_soc_dapm_mixer_update_power);
2040 /* show dapm widget status in sys fs */
2041 static ssize_t dapm_widget_show(struct device *dev,
2042 struct device_attribute *attr, char *buf)
2044 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
2045 struct snd_soc_codec *codec =rtd->codec;
2046 struct snd_soc_dapm_widget *w;
2048 char *state = "not set";
2050 list_for_each_entry(w, &codec->card->widgets, list) {
2051 if (w->dapm != &codec->dapm)
2054 /* only display widgets that burnm power */
2056 case snd_soc_dapm_hp:
2057 case snd_soc_dapm_mic:
2058 case snd_soc_dapm_spk:
2059 case snd_soc_dapm_line:
2060 case snd_soc_dapm_micbias:
2061 case snd_soc_dapm_dac:
2062 case snd_soc_dapm_adc:
2063 case snd_soc_dapm_pga:
2064 case snd_soc_dapm_out_drv:
2065 case snd_soc_dapm_mixer:
2066 case snd_soc_dapm_mixer_named_ctl:
2067 case snd_soc_dapm_supply:
2068 case snd_soc_dapm_regulator_supply:
2069 case snd_soc_dapm_clock_supply:
2071 count += sprintf(buf + count, "%s: %s\n",
2072 w->name, w->power ? "On":"Off");
2079 switch (codec->dapm.bias_level) {
2080 case SND_SOC_BIAS_ON:
2083 case SND_SOC_BIAS_PREPARE:
2086 case SND_SOC_BIAS_STANDBY:
2089 case SND_SOC_BIAS_OFF:
2093 count += sprintf(buf + count, "PM State: %s\n", state);
2098 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
2100 int snd_soc_dapm_sys_add(struct device *dev)
2102 return device_create_file(dev, &dev_attr_dapm_widget);
2105 static void snd_soc_dapm_sys_remove(struct device *dev)
2107 device_remove_file(dev, &dev_attr_dapm_widget);
2110 static void dapm_free_path(struct snd_soc_dapm_path *path)
2112 list_del(&path->list_sink);
2113 list_del(&path->list_source);
2114 list_del(&path->list);
2118 /* free all dapm widgets and resources */
2119 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
2121 struct snd_soc_dapm_widget *w, *next_w;
2122 struct snd_soc_dapm_path *p, *next_p;
2124 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
2125 if (w->dapm != dapm)
2129 * remove source and sink paths associated to this widget.
2130 * While removing the path, remove reference to it from both
2131 * source and sink widgets so that path is removed only once.
2133 list_for_each_entry_safe(p, next_p, &w->sources, list_sink)
2136 list_for_each_entry_safe(p, next_p, &w->sinks, list_source)
2139 kfree(w->kcontrols);
2145 static struct snd_soc_dapm_widget *dapm_find_widget(
2146 struct snd_soc_dapm_context *dapm, const char *pin,
2147 bool search_other_contexts)
2149 struct snd_soc_dapm_widget *w;
2150 struct snd_soc_dapm_widget *fallback = NULL;
2152 list_for_each_entry(w, &dapm->card->widgets, list) {
2153 if (!strcmp(w->name, pin)) {
2154 if (w->dapm == dapm)
2161 if (search_other_contexts)
2167 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
2168 const char *pin, int status)
2170 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2173 dev_err(dapm->dev, "ASoC: DAPM unknown pin %s\n", pin);
2177 if (w->connected != status)
2178 dapm_mark_dirty(w, "pin configuration");
2180 w->connected = status;
2188 * snd_soc_dapm_sync - scan and power dapm paths
2189 * @dapm: DAPM context
2191 * Walks all dapm audio paths and powers widgets according to their
2192 * stream or path usage.
2194 * Returns 0 for success.
2196 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
2201 * Suppress early reports (eg, jacks syncing their state) to avoid
2202 * silly DAPM runs during card startup.
2204 if (!dapm->card || !dapm->card->instantiated)
2207 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2208 ret = dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
2209 mutex_unlock(&dapm->card->dapm_mutex);
2212 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
2214 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
2215 const struct snd_soc_dapm_route *route)
2217 struct snd_soc_dapm_path *path;
2218 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
2219 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
2221 const char *control = route->control;
2223 char prefixed_sink[80];
2224 char prefixed_source[80];
2227 if (dapm->codec && dapm->codec->name_prefix) {
2228 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
2229 dapm->codec->name_prefix, route->sink);
2230 sink = prefixed_sink;
2231 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
2232 dapm->codec->name_prefix, route->source);
2233 source = prefixed_source;
2236 source = route->source;
2240 * find src and dest widgets over all widgets but favor a widget from
2241 * current DAPM context
2243 list_for_each_entry(w, &dapm->card->widgets, list) {
2244 if (!wsink && !(strcmp(w->name, sink))) {
2246 if (w->dapm == dapm)
2250 if (!wsource && !(strcmp(w->name, source))) {
2252 if (w->dapm == dapm)
2256 /* use widget from another DAPM context if not found from this */
2262 if (wsource == NULL) {
2263 dev_err(dapm->dev, "ASoC: no source widget found for %s\n",
2267 if (wsink == NULL) {
2268 dev_err(dapm->dev, "ASoC: no sink widget found for %s\n",
2273 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
2277 path->source = wsource;
2279 path->connected = route->connected;
2280 INIT_LIST_HEAD(&path->list);
2281 INIT_LIST_HEAD(&path->list_source);
2282 INIT_LIST_HEAD(&path->list_sink);
2284 /* check for external widgets */
2285 if (wsink->id == snd_soc_dapm_input) {
2286 if (wsource->id == snd_soc_dapm_micbias ||
2287 wsource->id == snd_soc_dapm_mic ||
2288 wsource->id == snd_soc_dapm_line ||
2289 wsource->id == snd_soc_dapm_output)
2292 if (wsource->id == snd_soc_dapm_output) {
2293 if (wsink->id == snd_soc_dapm_spk ||
2294 wsink->id == snd_soc_dapm_hp ||
2295 wsink->id == snd_soc_dapm_line ||
2296 wsink->id == snd_soc_dapm_input)
2300 /* connect static paths */
2301 if (control == NULL) {
2302 list_add(&path->list, &dapm->card->paths);
2303 list_add(&path->list_sink, &wsink->sources);
2304 list_add(&path->list_source, &wsource->sinks);
2309 /* connect dynamic paths */
2310 switch (wsink->id) {
2311 case snd_soc_dapm_adc:
2312 case snd_soc_dapm_dac:
2313 case snd_soc_dapm_pga:
2314 case snd_soc_dapm_out_drv:
2315 case snd_soc_dapm_input:
2316 case snd_soc_dapm_output:
2317 case snd_soc_dapm_siggen:
2318 case snd_soc_dapm_micbias:
2319 case snd_soc_dapm_vmid:
2320 case snd_soc_dapm_pre:
2321 case snd_soc_dapm_post:
2322 case snd_soc_dapm_supply:
2323 case snd_soc_dapm_regulator_supply:
2324 case snd_soc_dapm_clock_supply:
2325 case snd_soc_dapm_aif_in:
2326 case snd_soc_dapm_aif_out:
2327 case snd_soc_dapm_dai_in:
2328 case snd_soc_dapm_dai_out:
2329 case snd_soc_dapm_dai_link:
2330 list_add(&path->list, &dapm->card->paths);
2331 list_add(&path->list_sink, &wsink->sources);
2332 list_add(&path->list_source, &wsource->sinks);
2335 case snd_soc_dapm_mux:
2336 case snd_soc_dapm_virt_mux:
2337 case snd_soc_dapm_value_mux:
2338 ret = dapm_connect_mux(dapm, wsource, wsink, path, control,
2339 &wsink->kcontrol_news[0]);
2343 case snd_soc_dapm_switch:
2344 case snd_soc_dapm_mixer:
2345 case snd_soc_dapm_mixer_named_ctl:
2346 ret = dapm_connect_mixer(dapm, wsource, wsink, path, control);
2350 case snd_soc_dapm_hp:
2351 case snd_soc_dapm_mic:
2352 case snd_soc_dapm_line:
2353 case snd_soc_dapm_spk:
2354 list_add(&path->list, &dapm->card->paths);
2355 list_add(&path->list_sink, &wsink->sources);
2356 list_add(&path->list_source, &wsource->sinks);
2361 dapm_mark_dirty(wsource, "Route added");
2362 dapm_mark_dirty(wsink, "Route added");
2367 dev_warn(dapm->dev, "ASoC: no dapm match for %s --> %s --> %s\n",
2368 source, control, sink);
2373 static int snd_soc_dapm_del_route(struct snd_soc_dapm_context *dapm,
2374 const struct snd_soc_dapm_route *route)
2376 struct snd_soc_dapm_path *path, *p;
2379 char prefixed_sink[80];
2380 char prefixed_source[80];
2382 if (route->control) {
2384 "ASoC: Removal of routes with controls not supported\n");
2388 if (dapm->codec && dapm->codec->name_prefix) {
2389 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
2390 dapm->codec->name_prefix, route->sink);
2391 sink = prefixed_sink;
2392 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
2393 dapm->codec->name_prefix, route->source);
2394 source = prefixed_source;
2397 source = route->source;
2401 list_for_each_entry(p, &dapm->card->paths, list) {
2402 if (strcmp(p->source->name, source) != 0)
2404 if (strcmp(p->sink->name, sink) != 0)
2411 dapm_mark_dirty(path->source, "Route removed");
2412 dapm_mark_dirty(path->sink, "Route removed");
2414 dapm_free_path(path);
2416 dev_warn(dapm->dev, "ASoC: Route %s->%s does not exist\n",
2424 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
2425 * @dapm: DAPM context
2426 * @route: audio routes
2427 * @num: number of routes
2429 * Connects 2 dapm widgets together via a named audio path. The sink is
2430 * the widget receiving the audio signal, whilst the source is the sender
2431 * of the audio signal.
2433 * Returns 0 for success else error. On error all resources can be freed
2434 * with a call to snd_soc_card_free().
2436 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
2437 const struct snd_soc_dapm_route *route, int num)
2441 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2442 for (i = 0; i < num; i++) {
2443 r = snd_soc_dapm_add_route(dapm, route);
2445 dev_err(dapm->dev, "ASoC: Failed to add route %s -> %s -> %s\n",
2447 route->control ? route->control : "direct",
2453 mutex_unlock(&dapm->card->dapm_mutex);
2457 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
2460 * snd_soc_dapm_del_routes - Remove routes between DAPM widgets
2461 * @dapm: DAPM context
2462 * @route: audio routes
2463 * @num: number of routes
2465 * Removes routes from the DAPM context.
2467 int snd_soc_dapm_del_routes(struct snd_soc_dapm_context *dapm,
2468 const struct snd_soc_dapm_route *route, int num)
2472 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2473 for (i = 0; i < num; i++) {
2474 snd_soc_dapm_del_route(dapm, route);
2477 mutex_unlock(&dapm->card->dapm_mutex);
2481 EXPORT_SYMBOL_GPL(snd_soc_dapm_del_routes);
2483 static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm,
2484 const struct snd_soc_dapm_route *route)
2486 struct snd_soc_dapm_widget *source = dapm_find_widget(dapm,
2489 struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm,
2492 struct snd_soc_dapm_path *path;
2496 dev_err(dapm->dev, "ASoC: Unable to find source %s for weak route\n",
2502 dev_err(dapm->dev, "ASoC: Unable to find sink %s for weak route\n",
2507 if (route->control || route->connected)
2508 dev_warn(dapm->dev, "ASoC: Ignoring control for weak route %s->%s\n",
2509 route->source, route->sink);
2511 list_for_each_entry(path, &source->sinks, list_source) {
2512 if (path->sink == sink) {
2519 dev_err(dapm->dev, "ASoC: No path found for weak route %s->%s\n",
2520 route->source, route->sink);
2522 dev_warn(dapm->dev, "ASoC: %d paths found for weak route %s->%s\n",
2523 count, route->source, route->sink);
2529 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
2530 * @dapm: DAPM context
2531 * @route: audio routes
2532 * @num: number of routes
2534 * Mark existing routes matching those specified in the passed array
2535 * as being weak, meaning that they are ignored for the purpose of
2536 * power decisions. The main intended use case is for sidetone paths
2537 * which couple audio between other independent paths if they are both
2538 * active in order to make the combination work better at the user
2539 * level but which aren't intended to be "used".
2541 * Note that CODEC drivers should not use this as sidetone type paths
2542 * can frequently also be used as bypass paths.
2544 int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm,
2545 const struct snd_soc_dapm_route *route, int num)
2550 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2551 for (i = 0; i < num; i++) {
2552 err = snd_soc_dapm_weak_route(dapm, route);
2557 mutex_unlock(&dapm->card->dapm_mutex);
2561 EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes);
2564 * snd_soc_dapm_new_widgets - add new dapm widgets
2565 * @dapm: DAPM context
2567 * Checks the codec for any new dapm widgets and creates them if found.
2569 * Returns 0 for success.
2571 int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context *dapm)
2573 struct snd_soc_dapm_widget *w;
2576 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2578 list_for_each_entry(w, &dapm->card->widgets, list)
2583 if (w->num_kcontrols) {
2584 w->kcontrols = kzalloc(w->num_kcontrols *
2585 sizeof(struct snd_kcontrol *),
2587 if (!w->kcontrols) {
2588 mutex_unlock(&dapm->card->dapm_mutex);
2594 case snd_soc_dapm_switch:
2595 case snd_soc_dapm_mixer:
2596 case snd_soc_dapm_mixer_named_ctl:
2599 case snd_soc_dapm_mux:
2600 case snd_soc_dapm_virt_mux:
2601 case snd_soc_dapm_value_mux:
2604 case snd_soc_dapm_pga:
2605 case snd_soc_dapm_out_drv:
2612 /* Read the initial power state from the device */
2614 val = soc_widget_read(w, w->reg);
2615 val &= 1 << w->shift;
2625 dapm_mark_dirty(w, "new widget");
2626 dapm_debugfs_add_widget(w);
2629 dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
2630 mutex_unlock(&dapm->card->dapm_mutex);
2633 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
2636 * snd_soc_dapm_get_volsw - dapm mixer get callback
2637 * @kcontrol: mixer control
2638 * @ucontrol: control element information
2640 * Callback to get the value of a dapm mixer control.
2642 * Returns 0 for success.
2644 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
2645 struct snd_ctl_elem_value *ucontrol)
2647 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2648 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2649 struct soc_mixer_control *mc =
2650 (struct soc_mixer_control *)kcontrol->private_value;
2651 unsigned int reg = mc->reg;
2652 unsigned int shift = mc->shift;
2654 unsigned int mask = (1 << fls(max)) - 1;
2655 unsigned int invert = mc->invert;
2657 if (snd_soc_volsw_is_stereo(mc))
2658 dev_warn(widget->dapm->dev,
2659 "ASoC: Control '%s' is stereo, which is not supported\n",
2662 ucontrol->value.integer.value[0] =
2663 (snd_soc_read(widget->codec, reg) >> shift) & mask;
2665 ucontrol->value.integer.value[0] =
2666 max - ucontrol->value.integer.value[0];
2670 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
2673 * snd_soc_dapm_put_volsw - dapm mixer set callback
2674 * @kcontrol: mixer control
2675 * @ucontrol: control element information
2677 * Callback to set the value of a dapm mixer control.
2679 * Returns 0 for success.
2681 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
2682 struct snd_ctl_elem_value *ucontrol)
2684 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2685 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2686 struct snd_soc_codec *codec = widget->codec;
2687 struct snd_soc_card *card = codec->card;
2688 struct soc_mixer_control *mc =
2689 (struct soc_mixer_control *)kcontrol->private_value;
2690 unsigned int reg = mc->reg;
2691 unsigned int shift = mc->shift;
2693 unsigned int mask = (1 << fls(max)) - 1;
2694 unsigned int invert = mc->invert;
2696 int connect, change;
2697 struct snd_soc_dapm_update update;
2700 if (snd_soc_volsw_is_stereo(mc))
2701 dev_warn(widget->dapm->dev,
2702 "ASoC: Control '%s' is stereo, which is not supported\n",
2705 val = (ucontrol->value.integer.value[0] & mask);
2710 mask = mask << shift;
2713 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2715 change = snd_soc_test_bits(widget->codec, reg, mask, val);
2717 for (wi = 0; wi < wlist->num_widgets; wi++) {
2718 widget = wlist->widgets[wi];
2720 widget->value = val;
2722 update.kcontrol = kcontrol;
2723 update.widget = widget;
2727 widget->dapm->update = &update;
2729 soc_dapm_mixer_update_power(widget, kcontrol, connect);
2731 widget->dapm->update = NULL;
2735 mutex_unlock(&card->dapm_mutex);
2738 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
2741 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
2742 * @kcontrol: mixer control
2743 * @ucontrol: control element information
2745 * Callback to get the value of a dapm enumerated double mixer control.
2747 * Returns 0 for success.
2749 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
2750 struct snd_ctl_elem_value *ucontrol)
2752 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2753 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2754 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2757 val = snd_soc_read(widget->codec, e->reg);
2758 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & e->mask;
2759 if (e->shift_l != e->shift_r)
2760 ucontrol->value.enumerated.item[1] =
2761 (val >> e->shift_r) & e->mask;
2765 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
2768 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
2769 * @kcontrol: mixer control
2770 * @ucontrol: control element information
2772 * Callback to set the value of a dapm enumerated double mixer control.
2774 * Returns 0 for success.
2776 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
2777 struct snd_ctl_elem_value *ucontrol)
2779 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2780 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2781 struct snd_soc_codec *codec = widget->codec;
2782 struct snd_soc_card *card = codec->card;
2783 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2784 unsigned int val, mux, change;
2786 struct snd_soc_dapm_update update;
2789 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2791 mux = ucontrol->value.enumerated.item[0];
2792 val = mux << e->shift_l;
2793 mask = e->mask << e->shift_l;
2794 if (e->shift_l != e->shift_r) {
2795 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2797 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2798 mask |= e->mask << e->shift_r;
2801 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2803 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2805 for (wi = 0; wi < wlist->num_widgets; wi++) {
2806 widget = wlist->widgets[wi];
2808 widget->value = val;
2810 update.kcontrol = kcontrol;
2811 update.widget = widget;
2812 update.reg = e->reg;
2815 widget->dapm->update = &update;
2817 soc_dapm_mux_update_power(widget, kcontrol, mux, e);
2819 widget->dapm->update = NULL;
2823 mutex_unlock(&card->dapm_mutex);
2826 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
2829 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
2830 * @kcontrol: mixer control
2831 * @ucontrol: control element information
2833 * Returns 0 for success.
2835 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
2836 struct snd_ctl_elem_value *ucontrol)
2838 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2839 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2841 ucontrol->value.enumerated.item[0] = widget->value;
2845 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt);
2848 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
2849 * @kcontrol: mixer control
2850 * @ucontrol: control element information
2852 * Returns 0 for success.
2854 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
2855 struct snd_ctl_elem_value *ucontrol)
2857 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2858 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2859 struct snd_soc_codec *codec = widget->codec;
2860 struct snd_soc_card *card = codec->card;
2861 struct soc_enum *e =
2862 (struct soc_enum *)kcontrol->private_value;
2867 if (ucontrol->value.enumerated.item[0] >= e->max)
2870 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2872 change = widget->value != ucontrol->value.enumerated.item[0];
2874 for (wi = 0; wi < wlist->num_widgets; wi++) {
2875 widget = wlist->widgets[wi];
2877 widget->value = ucontrol->value.enumerated.item[0];
2879 soc_dapm_mux_update_power(widget, kcontrol, widget->value, e);
2883 mutex_unlock(&card->dapm_mutex);
2886 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt);
2889 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
2891 * @kcontrol: mixer control
2892 * @ucontrol: control element information
2894 * Callback to get the value of a dapm semi enumerated double mixer control.
2896 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2897 * used for handling bitfield coded enumeration for example.
2899 * Returns 0 for success.
2901 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
2902 struct snd_ctl_elem_value *ucontrol)
2904 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2905 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2906 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2907 unsigned int reg_val, val, mux;
2909 reg_val = snd_soc_read(widget->codec, e->reg);
2910 val = (reg_val >> e->shift_l) & e->mask;
2911 for (mux = 0; mux < e->max; mux++) {
2912 if (val == e->values[mux])
2915 ucontrol->value.enumerated.item[0] = mux;
2916 if (e->shift_l != e->shift_r) {
2917 val = (reg_val >> e->shift_r) & e->mask;
2918 for (mux = 0; mux < e->max; mux++) {
2919 if (val == e->values[mux])
2922 ucontrol->value.enumerated.item[1] = mux;
2927 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
2930 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
2932 * @kcontrol: mixer control
2933 * @ucontrol: control element information
2935 * Callback to set the value of a dapm semi enumerated double mixer control.
2937 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2938 * used for handling bitfield coded enumeration for example.
2940 * Returns 0 for success.
2942 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
2943 struct snd_ctl_elem_value *ucontrol)
2945 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2946 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2947 struct snd_soc_codec *codec = widget->codec;
2948 struct snd_soc_card *card = codec->card;
2949 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2950 unsigned int val, mux, change;
2952 struct snd_soc_dapm_update update;
2955 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2957 mux = ucontrol->value.enumerated.item[0];
2958 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2959 mask = e->mask << e->shift_l;
2960 if (e->shift_l != e->shift_r) {
2961 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2963 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2964 mask |= e->mask << e->shift_r;
2967 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2969 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2971 for (wi = 0; wi < wlist->num_widgets; wi++) {
2972 widget = wlist->widgets[wi];
2974 widget->value = val;
2976 update.kcontrol = kcontrol;
2977 update.widget = widget;
2978 update.reg = e->reg;
2981 widget->dapm->update = &update;
2983 soc_dapm_mux_update_power(widget, kcontrol, mux, e);
2985 widget->dapm->update = NULL;
2989 mutex_unlock(&card->dapm_mutex);
2992 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
2995 * snd_soc_dapm_info_pin_switch - Info for a pin switch
2997 * @kcontrol: mixer control
2998 * @uinfo: control element information
3000 * Callback to provide information about a pin switch control.
3002 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
3003 struct snd_ctl_elem_info *uinfo)
3005 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
3007 uinfo->value.integer.min = 0;
3008 uinfo->value.integer.max = 1;
3012 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
3015 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
3017 * @kcontrol: mixer control
3020 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
3021 struct snd_ctl_elem_value *ucontrol)
3023 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
3024 const char *pin = (const char *)kcontrol->private_value;
3026 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3028 ucontrol->value.integer.value[0] =
3029 snd_soc_dapm_get_pin_status(&card->dapm, pin);
3031 mutex_unlock(&card->dapm_mutex);
3035 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
3038 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
3040 * @kcontrol: mixer control
3043 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
3044 struct snd_ctl_elem_value *ucontrol)
3046 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
3047 const char *pin = (const char *)kcontrol->private_value;
3049 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3051 if (ucontrol->value.integer.value[0])
3052 snd_soc_dapm_enable_pin(&card->dapm, pin);
3054 snd_soc_dapm_disable_pin(&card->dapm, pin);
3056 mutex_unlock(&card->dapm_mutex);
3058 snd_soc_dapm_sync(&card->dapm);
3061 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
3063 static struct snd_soc_dapm_widget *
3064 snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
3065 const struct snd_soc_dapm_widget *widget)
3067 struct snd_soc_dapm_widget *w;
3070 if ((w = dapm_cnew_widget(widget)) == NULL)
3074 case snd_soc_dapm_regulator_supply:
3075 w->regulator = devm_regulator_get(dapm->dev, w->name);
3076 if (IS_ERR(w->regulator)) {
3077 ret = PTR_ERR(w->regulator);
3078 dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n",
3083 if (w->invert & SND_SOC_DAPM_REGULATOR_BYPASS) {
3084 ret = regulator_allow_bypass(w->regulator, true);
3086 dev_warn(w->dapm->dev,
3087 "ASoC: Failed to unbypass %s: %d\n",
3091 case snd_soc_dapm_clock_supply:
3092 #ifdef CONFIG_CLKDEV_LOOKUP
3093 w->clk = devm_clk_get(dapm->dev, w->name);
3094 if (IS_ERR(w->clk)) {
3095 ret = PTR_ERR(w->clk);
3096 dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n",
3108 if (dapm->codec && dapm->codec->name_prefix)
3109 w->name = kasprintf(GFP_KERNEL, "%s %s",
3110 dapm->codec->name_prefix, widget->name);
3112 w->name = kasprintf(GFP_KERNEL, "%s", widget->name);
3114 if (w->name == NULL) {
3120 case snd_soc_dapm_switch:
3121 case snd_soc_dapm_mixer:
3122 case snd_soc_dapm_mixer_named_ctl:
3123 w->power_check = dapm_generic_check_power;
3125 case snd_soc_dapm_mux:
3126 case snd_soc_dapm_virt_mux:
3127 case snd_soc_dapm_value_mux:
3128 w->power_check = dapm_generic_check_power;
3130 case snd_soc_dapm_adc:
3131 case snd_soc_dapm_aif_out:
3132 case snd_soc_dapm_dai_out:
3133 w->power_check = dapm_adc_check_power;
3135 case snd_soc_dapm_dac:
3136 case snd_soc_dapm_aif_in:
3137 case snd_soc_dapm_dai_in:
3138 w->power_check = dapm_dac_check_power;
3140 case snd_soc_dapm_pga:
3141 case snd_soc_dapm_out_drv:
3142 case snd_soc_dapm_input:
3143 case snd_soc_dapm_output:
3144 case snd_soc_dapm_micbias:
3145 case snd_soc_dapm_spk:
3146 case snd_soc_dapm_hp:
3147 case snd_soc_dapm_mic:
3148 case snd_soc_dapm_line:
3149 case snd_soc_dapm_dai_link:
3150 w->power_check = dapm_generic_check_power;
3152 case snd_soc_dapm_supply:
3153 case snd_soc_dapm_regulator_supply:
3154 case snd_soc_dapm_clock_supply:
3155 w->power_check = dapm_supply_check_power;
3158 w->power_check = dapm_always_on_check_power;
3163 w->codec = dapm->codec;
3164 w->platform = dapm->platform;
3165 INIT_LIST_HEAD(&w->sources);
3166 INIT_LIST_HEAD(&w->sinks);
3167 INIT_LIST_HEAD(&w->list);
3168 INIT_LIST_HEAD(&w->dirty);
3169 list_add(&w->list, &dapm->card->widgets);
3171 /* machine layer set ups unconnected pins and insertions */
3177 * snd_soc_dapm_new_controls - create new dapm controls
3178 * @dapm: DAPM context
3179 * @widget: widget array
3180 * @num: number of widgets
3182 * Creates new DAPM controls based upon the templates.
3184 * Returns 0 for success else error.
3186 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
3187 const struct snd_soc_dapm_widget *widget,
3190 struct snd_soc_dapm_widget *w;
3194 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
3195 for (i = 0; i < num; i++) {
3196 w = snd_soc_dapm_new_control(dapm, widget);
3199 "ASoC: Failed to create DAPM control %s\n",
3206 mutex_unlock(&dapm->card->dapm_mutex);
3209 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
3211 static int snd_soc_dai_link_event(struct snd_soc_dapm_widget *w,
3212 struct snd_kcontrol *kcontrol, int event)
3214 struct snd_soc_dapm_path *source_p, *sink_p;
3215 struct snd_soc_dai *source, *sink;
3216 const struct snd_soc_pcm_stream *config = w->params;
3217 struct snd_pcm_substream substream;
3218 struct snd_pcm_hw_params *params = NULL;
3223 BUG_ON(list_empty(&w->sources) || list_empty(&w->sinks));
3225 /* We only support a single source and sink, pick the first */
3226 source_p = list_first_entry(&w->sources, struct snd_soc_dapm_path,
3228 sink_p = list_first_entry(&w->sinks, struct snd_soc_dapm_path,
3231 BUG_ON(!source_p || !sink_p);
3232 BUG_ON(!sink_p->source || !source_p->sink);
3233 BUG_ON(!source_p->source || !sink_p->sink);
3235 source = source_p->source->priv;
3236 sink = sink_p->sink->priv;
3238 /* Be a little careful as we don't want to overflow the mask array */
3239 if (config->formats) {
3240 fmt = ffs(config->formats) - 1;
3242 dev_warn(w->dapm->dev, "ASoC: Invalid format %llx specified\n",
3247 /* Currently very limited parameter selection */
3248 params = kzalloc(sizeof(*params), GFP_KERNEL);
3253 snd_mask_set(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), fmt);
3255 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->min =
3257 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->max =
3260 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->min
3261 = config->channels_min;
3262 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->max
3263 = config->channels_max;
3265 memset(&substream, 0, sizeof(substream));
3268 case SND_SOC_DAPM_PRE_PMU:
3269 if (source->driver->ops && source->driver->ops->hw_params) {
3270 substream.stream = SNDRV_PCM_STREAM_CAPTURE;
3271 ret = source->driver->ops->hw_params(&substream,
3274 dev_err(source->dev,
3275 "ASoC: hw_params() failed: %d\n", ret);
3280 if (sink->driver->ops && sink->driver->ops->hw_params) {
3281 substream.stream = SNDRV_PCM_STREAM_PLAYBACK;
3282 ret = sink->driver->ops->hw_params(&substream, params,
3286 "ASoC: hw_params() failed: %d\n", ret);
3292 case SND_SOC_DAPM_POST_PMU:
3293 ret = snd_soc_dai_digital_mute(sink, 0,
3294 SNDRV_PCM_STREAM_PLAYBACK);
3295 if (ret != 0 && ret != -ENOTSUPP)
3296 dev_warn(sink->dev, "ASoC: Failed to unmute: %d\n", ret);
3300 case SND_SOC_DAPM_PRE_PMD:
3301 ret = snd_soc_dai_digital_mute(sink, 1,
3302 SNDRV_PCM_STREAM_PLAYBACK);
3303 if (ret != 0 && ret != -ENOTSUPP)
3304 dev_warn(sink->dev, "ASoC: Failed to mute: %d\n", ret);
3318 int snd_soc_dapm_new_pcm(struct snd_soc_card *card,
3319 const struct snd_soc_pcm_stream *params,
3320 struct snd_soc_dapm_widget *source,
3321 struct snd_soc_dapm_widget *sink)
3323 struct snd_soc_dapm_route routes[2];
3324 struct snd_soc_dapm_widget template;
3325 struct snd_soc_dapm_widget *w;
3329 len = strlen(source->name) + strlen(sink->name) + 2;
3330 link_name = devm_kzalloc(card->dev, len, GFP_KERNEL);
3333 snprintf(link_name, len, "%s-%s", source->name, sink->name);
3335 memset(&template, 0, sizeof(template));
3336 template.reg = SND_SOC_NOPM;
3337 template.id = snd_soc_dapm_dai_link;
3338 template.name = link_name;
3339 template.event = snd_soc_dai_link_event;
3340 template.event_flags = SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
3341 SND_SOC_DAPM_PRE_PMD;
3343 dev_dbg(card->dev, "ASoC: adding %s widget\n", link_name);
3345 w = snd_soc_dapm_new_control(&card->dapm, &template);
3347 dev_err(card->dev, "ASoC: Failed to create %s widget\n",
3354 memset(&routes, 0, sizeof(routes));
3356 routes[0].source = source->name;
3357 routes[0].sink = link_name;
3358 routes[1].source = link_name;
3359 routes[1].sink = sink->name;
3361 return snd_soc_dapm_add_routes(&card->dapm, routes,
3362 ARRAY_SIZE(routes));
3365 int snd_soc_dapm_new_dai_widgets(struct snd_soc_dapm_context *dapm,
3366 struct snd_soc_dai *dai)
3368 struct snd_soc_dapm_widget template;
3369 struct snd_soc_dapm_widget *w;
3371 WARN_ON(dapm->dev != dai->dev);
3373 memset(&template, 0, sizeof(template));
3374 template.reg = SND_SOC_NOPM;
3376 if (dai->driver->playback.stream_name) {
3377 template.id = snd_soc_dapm_dai_in;
3378 template.name = dai->driver->playback.stream_name;
3379 template.sname = dai->driver->playback.stream_name;
3381 dev_dbg(dai->dev, "ASoC: adding %s widget\n",
3384 w = snd_soc_dapm_new_control(dapm, &template);
3386 dev_err(dapm->dev, "ASoC: Failed to create %s widget\n",
3387 dai->driver->playback.stream_name);
3391 dai->playback_widget = w;
3394 if (dai->driver->capture.stream_name) {
3395 template.id = snd_soc_dapm_dai_out;
3396 template.name = dai->driver->capture.stream_name;
3397 template.sname = dai->driver->capture.stream_name;
3399 dev_dbg(dai->dev, "ASoC: adding %s widget\n",
3402 w = snd_soc_dapm_new_control(dapm, &template);
3404 dev_err(dapm->dev, "ASoC: Failed to create %s widget\n",
3405 dai->driver->capture.stream_name);
3409 dai->capture_widget = w;
3415 int snd_soc_dapm_link_dai_widgets(struct snd_soc_card *card)
3417 struct snd_soc_dapm_widget *dai_w, *w;
3418 struct snd_soc_dai *dai;
3419 struct snd_soc_dapm_route r;
3421 memset(&r, 0, sizeof(r));
3423 /* For each DAI widget... */
3424 list_for_each_entry(dai_w, &card->widgets, list) {
3425 switch (dai_w->id) {
3426 case snd_soc_dapm_dai_in:
3427 case snd_soc_dapm_dai_out:
3435 /* ...find all widgets with the same stream and link them */
3436 list_for_each_entry(w, &card->widgets, list) {
3437 if (w->dapm != dai_w->dapm)
3441 case snd_soc_dapm_dai_in:
3442 case snd_soc_dapm_dai_out:
3451 if (dai->driver->playback.stream_name &&
3453 dai->driver->playback.stream_name)) {
3454 r.source = dai->playback_widget->name;
3456 dev_dbg(dai->dev, "%s -> %s\n",
3459 snd_soc_dapm_add_route(w->dapm, &r);
3462 if (dai->driver->capture.stream_name &&
3464 dai->driver->capture.stream_name)) {
3466 r.sink = dai->capture_widget->name;
3467 dev_dbg(dai->dev, "%s -> %s\n",
3470 snd_soc_dapm_add_route(w->dapm, &r);
3478 static void soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
3482 struct snd_soc_dapm_widget *w_cpu, *w_codec;
3483 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
3484 struct snd_soc_dai *codec_dai = rtd->codec_dai;
3486 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
3487 w_cpu = cpu_dai->playback_widget;
3488 w_codec = codec_dai->playback_widget;
3490 w_cpu = cpu_dai->capture_widget;
3491 w_codec = codec_dai->capture_widget;
3496 dapm_mark_dirty(w_cpu, "stream event");
3499 case SND_SOC_DAPM_STREAM_START:
3502 case SND_SOC_DAPM_STREAM_STOP:
3505 case SND_SOC_DAPM_STREAM_SUSPEND:
3506 case SND_SOC_DAPM_STREAM_RESUME:
3507 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
3508 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
3515 dapm_mark_dirty(w_codec, "stream event");
3518 case SND_SOC_DAPM_STREAM_START:
3519 w_codec->active = 1;
3521 case SND_SOC_DAPM_STREAM_STOP:
3522 w_codec->active = 0;
3524 case SND_SOC_DAPM_STREAM_SUSPEND:
3525 case SND_SOC_DAPM_STREAM_RESUME:
3526 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
3527 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
3532 dapm_power_widgets(&rtd->card->dapm, event);
3536 * snd_soc_dapm_stream_event - send a stream event to the dapm core
3537 * @rtd: PCM runtime data
3538 * @stream: stream name
3539 * @event: stream event
3541 * Sends a stream event to the dapm core. The core then makes any
3542 * necessary widget power changes.
3544 * Returns 0 for success else error.
3546 void snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
3549 struct snd_soc_card *card = rtd->card;
3551 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3552 soc_dapm_stream_event(rtd, stream, event);
3553 mutex_unlock(&card->dapm_mutex);
3557 * snd_soc_dapm_enable_pin - enable pin.
3558 * @dapm: DAPM context
3561 * Enables input/output pin and its parents or children widgets iff there is
3562 * a valid audio route and active audio stream.
3563 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3564 * do any widget power switching.
3566 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
3568 return snd_soc_dapm_set_pin(dapm, pin, 1);
3570 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
3573 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
3574 * @dapm: DAPM context
3577 * Enables input/output pin regardless of any other state. This is
3578 * intended for use with microphone bias supplies used in microphone
3581 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3582 * do any widget power switching.
3584 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
3587 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
3590 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
3594 dev_dbg(w->dapm->dev, "ASoC: force enable pin %s\n", pin);
3597 dapm_mark_dirty(w, "force enable");
3601 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
3604 * snd_soc_dapm_disable_pin - disable pin.
3605 * @dapm: DAPM context
3608 * Disables input/output pin and its parents or children widgets.
3609 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3610 * do any widget power switching.
3612 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
3615 return snd_soc_dapm_set_pin(dapm, pin, 0);
3617 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
3620 * snd_soc_dapm_nc_pin - permanently disable pin.
3621 * @dapm: DAPM context
3624 * Marks the specified pin as being not connected, disabling it along
3625 * any parent or child widgets. At present this is identical to
3626 * snd_soc_dapm_disable_pin() but in future it will be extended to do
3627 * additional things such as disabling controls which only affect
3628 * paths through the pin.
3630 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3631 * do any widget power switching.
3633 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
3635 return snd_soc_dapm_set_pin(dapm, pin, 0);
3637 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
3640 * snd_soc_dapm_get_pin_status - get audio pin status
3641 * @dapm: DAPM context
3642 * @pin: audio signal pin endpoint (or start point)
3644 * Get audio pin status - connected or disconnected.
3646 * Returns 1 for connected otherwise 0.
3648 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
3651 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
3654 return w->connected;
3658 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
3661 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
3662 * @dapm: DAPM context
3663 * @pin: audio signal pin endpoint (or start point)
3665 * Mark the given endpoint or pin as ignoring suspend. When the
3666 * system is disabled a path between two endpoints flagged as ignoring
3667 * suspend will not be disabled. The path must already be enabled via
3668 * normal means at suspend time, it will not be turned on if it was not
3671 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
3674 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
3677 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
3681 w->ignore_suspend = 1;
3685 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
3687 static bool snd_soc_dapm_widget_in_card_paths(struct snd_soc_card *card,
3688 struct snd_soc_dapm_widget *w)
3690 struct snd_soc_dapm_path *p;
3692 list_for_each_entry(p, &card->paths, list) {
3693 if ((p->source == w) || (p->sink == w)) {
3695 "... Path %s(id:%d dapm:%p) - %s(id:%d dapm:%p)\n",
3696 p->source->name, p->source->id, p->source->dapm,
3697 p->sink->name, p->sink->id, p->sink->dapm);
3699 /* Connected to something other than the codec */
3700 if (p->source->dapm != p->sink->dapm)
3703 * Loopback connection from codec external pin to
3704 * codec external pin
3706 if (p->sink->id == snd_soc_dapm_input) {
3707 switch (p->source->id) {
3708 case snd_soc_dapm_output:
3709 case snd_soc_dapm_micbias:
3722 * snd_soc_dapm_auto_nc_codec_pins - call snd_soc_dapm_nc_pin for unused pins
3723 * @codec: The codec whose pins should be processed
3725 * Automatically call snd_soc_dapm_nc_pin() for any external pins in the codec
3726 * which are unused. Pins are used if they are connected externally to the
3727 * codec, whether that be to some other device, or a loop-back connection to
3730 void snd_soc_dapm_auto_nc_codec_pins(struct snd_soc_codec *codec)
3732 struct snd_soc_card *card = codec->card;
3733 struct snd_soc_dapm_context *dapm = &codec->dapm;
3734 struct snd_soc_dapm_widget *w;
3736 dev_dbg(codec->dev, "ASoC: Auto NC: DAPMs: card:%p codec:%p\n",
3737 &card->dapm, &codec->dapm);
3739 list_for_each_entry(w, &card->widgets, list) {
3740 if (w->dapm != dapm)
3743 case snd_soc_dapm_input:
3744 case snd_soc_dapm_output:
3745 case snd_soc_dapm_micbias:
3746 dev_dbg(codec->dev, "ASoC: Auto NC: Checking widget %s\n",
3748 if (!snd_soc_dapm_widget_in_card_paths(card, w)) {
3750 "... Not in map; disabling\n");
3751 snd_soc_dapm_nc_pin(dapm, w->name);
3761 * snd_soc_dapm_free - free dapm resources
3762 * @dapm: DAPM context
3764 * Free all dapm widgets and resources.
3766 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
3768 snd_soc_dapm_sys_remove(dapm->dev);
3769 dapm_debugfs_cleanup(dapm);
3770 dapm_free_widgets(dapm);
3771 list_del(&dapm->list);
3773 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
3775 static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context *dapm)
3777 struct snd_soc_card *card = dapm->card;
3778 struct snd_soc_dapm_widget *w;
3779 LIST_HEAD(down_list);
3782 mutex_lock(&card->dapm_mutex);
3784 list_for_each_entry(w, &dapm->card->widgets, list) {
3785 if (w->dapm != dapm)
3788 dapm_seq_insert(w, &down_list, false);
3794 /* If there were no widgets to power down we're already in
3798 if (dapm->bias_level == SND_SOC_BIAS_ON)
3799 snd_soc_dapm_set_bias_level(dapm,
3800 SND_SOC_BIAS_PREPARE);
3801 dapm_seq_run(dapm, &down_list, 0, false);
3802 if (dapm->bias_level == SND_SOC_BIAS_PREPARE)
3803 snd_soc_dapm_set_bias_level(dapm,
3804 SND_SOC_BIAS_STANDBY);
3807 mutex_unlock(&card->dapm_mutex);
3811 * snd_soc_dapm_shutdown - callback for system shutdown
3813 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
3815 struct snd_soc_codec *codec;
3817 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
3818 soc_dapm_shutdown_codec(&codec->dapm);
3819 if (codec->dapm.bias_level == SND_SOC_BIAS_STANDBY)
3820 snd_soc_dapm_set_bias_level(&codec->dapm,
3825 /* Module information */
3826 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3827 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
3828 MODULE_LICENSE("GPL");