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/meadphone insertion events.
18 * o Automatic Mic Bias support
19 * o Jack insertion power event initiation - e.g. hp insertion will enable
21 * o Delayed powerdown of audio susbsystem to reduce pops between a quick
25 * o DAPM power change sequencing - allow for configurable per
27 * o Support for analogue bias optimisation.
28 * o Support for reduced codec oversampling rates.
29 * o Support for reduced codec bias currents.
32 #include <linux/module.h>
33 #include <linux/moduleparam.h>
34 #include <linux/init.h>
35 #include <linux/async.h>
36 #include <linux/delay.h>
38 #include <linux/bitops.h>
39 #include <linux/platform_device.h>
40 #include <linux/jiffies.h>
41 #include <linux/debugfs.h>
42 #include <linux/slab.h>
43 #include <sound/core.h>
44 #include <sound/pcm.h>
45 #include <sound/pcm_params.h>
46 #include <sound/soc.h>
47 #include <sound/initval.h>
49 #include <trace/events/asoc.h>
51 #define DAPM_UPDATE_STAT(widget, val) widget->dapm->card->dapm_stats.val++;
53 /* dapm power sequences - make this per codec in the future */
54 static int dapm_up_seq[] = {
55 [snd_soc_dapm_pre] = 0,
56 [snd_soc_dapm_supply] = 1,
57 [snd_soc_dapm_micbias] = 2,
58 [snd_soc_dapm_aif_in] = 3,
59 [snd_soc_dapm_aif_out] = 3,
60 [snd_soc_dapm_mic] = 4,
61 [snd_soc_dapm_mux] = 5,
62 [snd_soc_dapm_virt_mux] = 5,
63 [snd_soc_dapm_value_mux] = 5,
64 [snd_soc_dapm_dac] = 6,
65 [snd_soc_dapm_mixer] = 7,
66 [snd_soc_dapm_mixer_named_ctl] = 7,
67 [snd_soc_dapm_pga] = 8,
68 [snd_soc_dapm_adc] = 9,
69 [snd_soc_dapm_out_drv] = 10,
70 [snd_soc_dapm_hp] = 10,
71 [snd_soc_dapm_spk] = 10,
72 [snd_soc_dapm_post] = 11,
75 static int dapm_down_seq[] = {
76 [snd_soc_dapm_pre] = 0,
77 [snd_soc_dapm_adc] = 1,
78 [snd_soc_dapm_hp] = 2,
79 [snd_soc_dapm_spk] = 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_supply] = 11,
93 [snd_soc_dapm_post] = 12,
96 static void pop_wait(u32 pop_time)
99 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
102 static void pop_dbg(struct device *dev, u32 pop_time, const char *fmt, ...)
110 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
115 vsnprintf(buf, PAGE_SIZE, fmt, args);
116 dev_info(dev, "%s", buf);
122 static bool dapm_dirty_widget(struct snd_soc_dapm_widget *w)
124 return !list_empty(&w->dirty);
127 static void dapm_mark_dirty(struct snd_soc_dapm_widget *w)
129 if (!dapm_dirty_widget(w))
130 list_add_tail(&w->dirty, &w->dapm->card->dapm_dirty);
133 /* create a new dapm widget */
134 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
135 const struct snd_soc_dapm_widget *_widget)
137 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
140 /* get snd_card from DAPM context */
141 static inline struct snd_card *dapm_get_snd_card(
142 struct snd_soc_dapm_context *dapm)
145 return dapm->codec->card->snd_card;
146 else if (dapm->platform)
147 return dapm->platform->card->snd_card;
155 /* get soc_card from DAPM context */
156 static inline struct snd_soc_card *dapm_get_soc_card(
157 struct snd_soc_dapm_context *dapm)
160 return dapm->codec->card;
161 else if (dapm->platform)
162 return dapm->platform->card;
170 static int soc_widget_read(struct snd_soc_dapm_widget *w, int reg)
173 return snd_soc_read(w->codec, reg);
174 else if (w->platform)
175 return snd_soc_platform_read(w->platform, reg);
177 dev_err(w->dapm->dev, "no valid widget read method\n");
181 static int soc_widget_write(struct snd_soc_dapm_widget *w, int reg, int val)
184 return snd_soc_write(w->codec, reg, val);
185 else if (w->platform)
186 return snd_soc_platform_write(w->platform, reg, val);
188 dev_err(w->dapm->dev, "no valid widget write method\n");
192 static int soc_widget_update_bits(struct snd_soc_dapm_widget *w,
193 unsigned short reg, unsigned int mask, unsigned int value)
196 unsigned int old, new;
199 ret = soc_widget_read(w, reg);
204 new = (old & ~mask) | (value & mask);
207 ret = soc_widget_write(w, reg, new);
216 * snd_soc_dapm_set_bias_level - set the bias level for the system
217 * @dapm: DAPM context
218 * @level: level to configure
220 * Configure the bias (power) levels for the SoC audio device.
222 * Returns 0 for success else error.
224 static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm,
225 enum snd_soc_bias_level level)
227 struct snd_soc_card *card = dapm->card;
230 trace_snd_soc_bias_level_start(card, level);
232 if (card && card->set_bias_level)
233 ret = card->set_bias_level(card, dapm, level);
238 if (dapm->codec->driver->set_bias_level)
239 ret = dapm->codec->driver->set_bias_level(dapm->codec,
242 dapm->bias_level = level;
247 if (card && card->set_bias_level_post)
248 ret = card->set_bias_level_post(card, dapm, level);
250 trace_snd_soc_bias_level_done(card, level);
255 /* set up initial codec paths */
256 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
257 struct snd_soc_dapm_path *p, int i)
260 case snd_soc_dapm_switch:
261 case snd_soc_dapm_mixer:
262 case snd_soc_dapm_mixer_named_ctl: {
264 struct soc_mixer_control *mc = (struct soc_mixer_control *)
265 w->kcontrol_news[i].private_value;
266 unsigned int reg = mc->reg;
267 unsigned int shift = mc->shift;
269 unsigned int mask = (1 << fls(max)) - 1;
270 unsigned int invert = mc->invert;
272 val = soc_widget_read(w, reg);
273 val = (val >> shift) & mask;
275 if ((invert && !val) || (!invert && val))
281 case snd_soc_dapm_mux: {
282 struct soc_enum *e = (struct soc_enum *)
283 w->kcontrol_news[i].private_value;
284 int val, item, bitmask;
286 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
288 val = soc_widget_read(w, e->reg);
289 item = (val >> e->shift_l) & (bitmask - 1);
292 for (i = 0; i < e->max; i++) {
293 if (!(strcmp(p->name, e->texts[i])) && item == i)
298 case snd_soc_dapm_virt_mux: {
299 struct soc_enum *e = (struct soc_enum *)
300 w->kcontrol_news[i].private_value;
303 /* since a virtual mux has no backing registers to
304 * decide which path to connect, it will try to match
305 * with the first enumeration. This is to ensure
306 * that the default mux choice (the first) will be
307 * correctly powered up during initialization.
309 if (!strcmp(p->name, e->texts[0]))
313 case snd_soc_dapm_value_mux: {
314 struct soc_enum *e = (struct soc_enum *)
315 w->kcontrol_news[i].private_value;
318 val = soc_widget_read(w, e->reg);
319 val = (val >> e->shift_l) & e->mask;
320 for (item = 0; item < e->max; item++) {
321 if (val == e->values[item])
326 for (i = 0; i < e->max; i++) {
327 if (!(strcmp(p->name, e->texts[i])) && item == i)
332 /* does not affect routing - always connected */
333 case snd_soc_dapm_pga:
334 case snd_soc_dapm_out_drv:
335 case snd_soc_dapm_output:
336 case snd_soc_dapm_adc:
337 case snd_soc_dapm_input:
338 case snd_soc_dapm_dac:
339 case snd_soc_dapm_micbias:
340 case snd_soc_dapm_vmid:
341 case snd_soc_dapm_supply:
342 case snd_soc_dapm_aif_in:
343 case snd_soc_dapm_aif_out:
344 case snd_soc_dapm_hp:
345 case snd_soc_dapm_mic:
346 case snd_soc_dapm_spk:
347 case snd_soc_dapm_line:
350 /* does affect routing - dynamically connected */
351 case snd_soc_dapm_pre:
352 case snd_soc_dapm_post:
358 /* connect mux widget to its interconnecting audio paths */
359 static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
360 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
361 struct snd_soc_dapm_path *path, const char *control_name,
362 const struct snd_kcontrol_new *kcontrol)
364 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
367 for (i = 0; i < e->max; i++) {
368 if (!(strcmp(control_name, e->texts[i]))) {
369 list_add(&path->list, &dapm->card->paths);
370 list_add(&path->list_sink, &dest->sources);
371 list_add(&path->list_source, &src->sinks);
372 path->name = (char*)e->texts[i];
373 dapm_set_path_status(dest, path, 0);
381 /* connect mixer widget to its interconnecting audio paths */
382 static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
383 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
384 struct snd_soc_dapm_path *path, const char *control_name)
388 /* search for mixer kcontrol */
389 for (i = 0; i < dest->num_kcontrols; i++) {
390 if (!strcmp(control_name, dest->kcontrol_news[i].name)) {
391 list_add(&path->list, &dapm->card->paths);
392 list_add(&path->list_sink, &dest->sources);
393 list_add(&path->list_source, &src->sinks);
394 path->name = dest->kcontrol_news[i].name;
395 dapm_set_path_status(dest, path, i);
402 static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm,
403 struct snd_soc_dapm_widget *kcontrolw,
404 const struct snd_kcontrol_new *kcontrol_new,
405 struct snd_kcontrol **kcontrol)
407 struct snd_soc_dapm_widget *w;
412 list_for_each_entry(w, &dapm->card->widgets, list) {
413 if (w == kcontrolw || w->dapm != kcontrolw->dapm)
415 for (i = 0; i < w->num_kcontrols; i++) {
416 if (&w->kcontrol_news[i] == kcontrol_new) {
418 *kcontrol = w->kcontrols[i];
427 /* create new dapm mixer control */
428 static int dapm_new_mixer(struct snd_soc_dapm_widget *w)
430 struct snd_soc_dapm_context *dapm = w->dapm;
432 size_t name_len, prefix_len;
433 struct snd_soc_dapm_path *path;
434 struct snd_card *card = dapm->card->snd_card;
436 struct snd_soc_dapm_widget_list *wlist;
440 prefix = dapm->codec->name_prefix;
445 prefix_len = strlen(prefix) + 1;
450 for (i = 0; i < w->num_kcontrols; i++) {
453 list_for_each_entry(path, &w->sources, list_sink) {
455 /* mixer/mux paths name must match control name */
456 if (path->name != (char *)w->kcontrol_news[i].name)
459 if (w->kcontrols[i]) {
460 path->kcontrol = w->kcontrols[i];
464 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
465 sizeof(struct snd_soc_dapm_widget *),
466 wlist = kzalloc(wlistsize, GFP_KERNEL);
469 "asoc: can't allocate widget list for %s\n",
473 wlist->num_widgets = 1;
474 wlist->widgets[0] = w;
476 /* add dapm control with long name.
477 * for dapm_mixer this is the concatenation of the
478 * mixer and kcontrol name.
479 * for dapm_mixer_named_ctl this is simply the
482 name_len = strlen(w->kcontrol_news[i].name) + 1;
483 if (w->id != snd_soc_dapm_mixer_named_ctl)
484 name_len += 1 + strlen(w->name);
486 path->long_name = kmalloc(name_len, GFP_KERNEL);
488 if (path->long_name == NULL) {
495 /* The control will get a prefix from
496 * the control creation process but
497 * we're also using the same prefix
498 * for widgets so cut the prefix off
499 * the front of the widget name.
501 snprintf(path->long_name, name_len, "%s %s",
502 w->name + prefix_len,
503 w->kcontrol_news[i].name);
505 case snd_soc_dapm_mixer_named_ctl:
506 snprintf(path->long_name, name_len, "%s",
507 w->kcontrol_news[i].name);
511 path->long_name[name_len - 1] = '\0';
513 path->kcontrol = snd_soc_cnew(&w->kcontrol_news[i],
514 wlist, path->long_name,
516 ret = snd_ctl_add(card, path->kcontrol);
519 "asoc: failed to add dapm kcontrol %s: %d\n",
520 path->long_name, ret);
522 kfree(path->long_name);
523 path->long_name = NULL;
526 w->kcontrols[i] = path->kcontrol;
532 /* create new dapm mux control */
533 static int dapm_new_mux(struct snd_soc_dapm_widget *w)
535 struct snd_soc_dapm_context *dapm = w->dapm;
536 struct snd_soc_dapm_path *path = NULL;
537 struct snd_kcontrol *kcontrol;
538 struct snd_card *card = dapm->card->snd_card;
542 struct snd_soc_dapm_widget_list *wlist;
543 int shared, wlistentries;
547 if (w->num_kcontrols != 1) {
549 "asoc: mux %s has incorrect number of controls\n",
554 shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[0],
557 wlist = kcontrol->private_data;
558 wlistentries = wlist->num_widgets + 1;
563 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
564 wlistentries * sizeof(struct snd_soc_dapm_widget *),
565 wlist = krealloc(wlist, wlistsize, GFP_KERNEL);
568 "asoc: can't allocate widget list for %s\n", w->name);
571 wlist->num_widgets = wlistentries;
572 wlist->widgets[wlistentries - 1] = w;
576 prefix = dapm->codec->name_prefix;
581 name = w->kcontrol_news[0].name;
586 prefix_len = strlen(prefix) + 1;
592 * The control will get a prefix from the control creation
593 * process but we're also using the same prefix for widgets so
594 * cut the prefix off the front of the widget name.
596 kcontrol = snd_soc_cnew(&w->kcontrol_news[0], wlist,
597 name + prefix_len, prefix);
598 ret = snd_ctl_add(card, kcontrol);
600 dev_err(dapm->dev, "failed to add kcontrol %s: %d\n",
607 kcontrol->private_data = wlist;
609 w->kcontrols[0] = kcontrol;
611 list_for_each_entry(path, &w->sources, list_sink)
612 path->kcontrol = kcontrol;
617 /* create new dapm volume control */
618 static int dapm_new_pga(struct snd_soc_dapm_widget *w)
620 if (w->num_kcontrols)
621 dev_err(w->dapm->dev,
622 "asoc: PGA controls not supported: '%s'\n", w->name);
627 /* reset 'walked' bit for each dapm path */
628 static inline void dapm_clear_walk(struct snd_soc_dapm_context *dapm)
630 struct snd_soc_dapm_path *p;
632 list_for_each_entry(p, &dapm->card->paths, list)
636 /* We implement power down on suspend by checking the power state of
637 * the ALSA card - when we are suspending the ALSA state for the card
640 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
642 int level = snd_power_get_state(widget->dapm->card->snd_card);
645 case SNDRV_CTL_POWER_D3hot:
646 case SNDRV_CTL_POWER_D3cold:
647 if (widget->ignore_suspend)
648 dev_dbg(widget->dapm->dev, "%s ignoring suspend\n",
650 return widget->ignore_suspend;
657 * Recursively check for a completed path to an active or physically connected
658 * output widget. Returns number of complete paths.
660 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
662 struct snd_soc_dapm_path *path;
665 DAPM_UPDATE_STAT(widget, path_checks);
667 if (widget->id == snd_soc_dapm_supply)
670 switch (widget->id) {
671 case snd_soc_dapm_adc:
672 case snd_soc_dapm_aif_out:
674 return snd_soc_dapm_suspend_check(widget);
679 if (widget->connected) {
680 /* connected pin ? */
681 if (widget->id == snd_soc_dapm_output && !widget->ext)
682 return snd_soc_dapm_suspend_check(widget);
684 /* connected jack or spk ? */
685 if (widget->id == snd_soc_dapm_hp || widget->id == snd_soc_dapm_spk ||
686 (widget->id == snd_soc_dapm_line && !list_empty(&widget->sources)))
687 return snd_soc_dapm_suspend_check(widget);
690 list_for_each_entry(path, &widget->sinks, list_source) {
691 DAPM_UPDATE_STAT(widget, neighbour_checks);
699 if (path->sink && path->connect) {
701 con += is_connected_output_ep(path->sink);
709 * Recursively check for a completed path to an active or physically connected
710 * input widget. Returns number of complete paths.
712 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
714 struct snd_soc_dapm_path *path;
717 DAPM_UPDATE_STAT(widget, path_checks);
719 if (widget->id == snd_soc_dapm_supply)
722 /* active stream ? */
723 switch (widget->id) {
724 case snd_soc_dapm_dac:
725 case snd_soc_dapm_aif_in:
727 return snd_soc_dapm_suspend_check(widget);
732 if (widget->connected) {
733 /* connected pin ? */
734 if (widget->id == snd_soc_dapm_input && !widget->ext)
735 return snd_soc_dapm_suspend_check(widget);
737 /* connected VMID/Bias for lower pops */
738 if (widget->id == snd_soc_dapm_vmid)
739 return snd_soc_dapm_suspend_check(widget);
741 /* connected jack ? */
742 if (widget->id == snd_soc_dapm_mic ||
743 (widget->id == snd_soc_dapm_line && !list_empty(&widget->sinks)))
744 return snd_soc_dapm_suspend_check(widget);
747 list_for_each_entry(path, &widget->sources, list_sink) {
748 DAPM_UPDATE_STAT(widget, neighbour_checks);
756 if (path->source && path->connect) {
758 con += is_connected_input_ep(path->source);
766 * Handler for generic register modifier widget.
768 int dapm_reg_event(struct snd_soc_dapm_widget *w,
769 struct snd_kcontrol *kcontrol, int event)
773 if (SND_SOC_DAPM_EVENT_ON(event))
778 soc_widget_update_bits(w, -(w->reg + 1),
779 w->mask << w->shift, val << w->shift);
783 EXPORT_SYMBOL_GPL(dapm_reg_event);
785 static int dapm_widget_power_check(struct snd_soc_dapm_widget *w)
790 return w->power_check(w);
793 /* Generic check to see if a widget should be powered.
795 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
799 DAPM_UPDATE_STAT(w, power_checks);
801 in = is_connected_input_ep(w);
802 dapm_clear_walk(w->dapm);
803 out = is_connected_output_ep(w);
804 dapm_clear_walk(w->dapm);
805 return out != 0 && in != 0;
808 /* Check to see if an ADC has power */
809 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
813 DAPM_UPDATE_STAT(w, power_checks);
816 in = is_connected_input_ep(w);
817 dapm_clear_walk(w->dapm);
820 return dapm_generic_check_power(w);
824 /* Check to see if a DAC has power */
825 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
829 DAPM_UPDATE_STAT(w, power_checks);
832 out = is_connected_output_ep(w);
833 dapm_clear_walk(w->dapm);
836 return dapm_generic_check_power(w);
840 /* Check to see if a power supply is needed */
841 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
843 struct snd_soc_dapm_path *path;
846 DAPM_UPDATE_STAT(w, power_checks);
848 /* Check if one of our outputs is connected */
849 list_for_each_entry(path, &w->sinks, list_source) {
850 DAPM_UPDATE_STAT(w, neighbour_checks);
855 if (path->connected &&
856 !path->connected(path->source, path->sink))
862 if (dapm_widget_power_check(path->sink)) {
868 dapm_clear_walk(w->dapm);
873 static int dapm_always_on_check_power(struct snd_soc_dapm_widget *w)
878 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
879 struct snd_soc_dapm_widget *b,
887 sort = dapm_down_seq;
889 if (sort[a->id] != sort[b->id])
890 return sort[a->id] - sort[b->id];
891 if (a->subseq != b->subseq) {
893 return a->subseq - b->subseq;
895 return b->subseq - a->subseq;
897 if (a->reg != b->reg)
898 return a->reg - b->reg;
899 if (a->dapm != b->dapm)
900 return (unsigned long)a->dapm - (unsigned long)b->dapm;
905 /* Insert a widget in order into a DAPM power sequence. */
906 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
907 struct list_head *list,
910 struct snd_soc_dapm_widget *w;
912 list_for_each_entry(w, list, power_list)
913 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
914 list_add_tail(&new_widget->power_list, &w->power_list);
918 list_add_tail(&new_widget->power_list, list);
921 static void dapm_seq_check_event(struct snd_soc_dapm_context *dapm,
922 struct snd_soc_dapm_widget *w, int event)
924 struct snd_soc_card *card = dapm->card;
929 case SND_SOC_DAPM_PRE_PMU:
933 case SND_SOC_DAPM_POST_PMU:
934 ev_name = "POST_PMU";
937 case SND_SOC_DAPM_PRE_PMD:
941 case SND_SOC_DAPM_POST_PMD:
942 ev_name = "POST_PMD";
950 if (w->power != power)
953 if (w->event && (w->event_flags & event)) {
954 pop_dbg(dapm->dev, card->pop_time, "pop test : %s %s\n",
956 trace_snd_soc_dapm_widget_event_start(w, event);
957 ret = w->event(w, NULL, event);
958 trace_snd_soc_dapm_widget_event_done(w, event);
960 pr_err("%s: %s event failed: %d\n",
961 ev_name, w->name, ret);
965 /* Apply the coalesced changes from a DAPM sequence */
966 static void dapm_seq_run_coalesced(struct snd_soc_dapm_context *dapm,
967 struct list_head *pending)
969 struct snd_soc_card *card = dapm->card;
970 struct snd_soc_dapm_widget *w;
972 unsigned int value = 0;
973 unsigned int mask = 0;
974 unsigned int cur_mask;
976 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
979 list_for_each_entry(w, pending, power_list) {
980 cur_mask = 1 << w->shift;
981 BUG_ON(reg != w->reg);
992 pop_dbg(dapm->dev, card->pop_time,
993 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
994 w->name, reg, value, mask);
996 /* Check for events */
997 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMU);
998 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMD);
1002 /* Any widget will do, they should all be updating the
1005 w = list_first_entry(pending, struct snd_soc_dapm_widget,
1008 pop_dbg(dapm->dev, card->pop_time,
1009 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
1010 value, mask, reg, card->pop_time);
1011 pop_wait(card->pop_time);
1012 soc_widget_update_bits(w, reg, mask, value);
1015 list_for_each_entry(w, pending, power_list) {
1016 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMU);
1017 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMD);
1021 /* Apply a DAPM power sequence.
1023 * We walk over a pre-sorted list of widgets to apply power to. In
1024 * order to minimise the number of writes to the device required
1025 * multiple widgets will be updated in a single write where possible.
1026 * Currently anything that requires more than a single write is not
1029 static void dapm_seq_run(struct snd_soc_dapm_context *dapm,
1030 struct list_head *list, int event, bool power_up)
1032 struct snd_soc_dapm_widget *w, *n;
1035 int cur_subseq = -1;
1036 int cur_reg = SND_SOC_NOPM;
1037 struct snd_soc_dapm_context *cur_dapm = NULL;
1044 sort = dapm_down_seq;
1046 list_for_each_entry_safe(w, n, list, power_list) {
1049 /* Do we need to apply any queued changes? */
1050 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
1051 w->dapm != cur_dapm || w->subseq != cur_subseq) {
1052 if (!list_empty(&pending))
1053 dapm_seq_run_coalesced(cur_dapm, &pending);
1055 if (cur_dapm && cur_dapm->seq_notifier) {
1056 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1057 if (sort[i] == cur_sort)
1058 cur_dapm->seq_notifier(cur_dapm,
1063 INIT_LIST_HEAD(&pending);
1065 cur_subseq = INT_MIN;
1066 cur_reg = SND_SOC_NOPM;
1071 case snd_soc_dapm_pre:
1073 list_for_each_entry_safe_continue(w, n, list,
1076 if (event == SND_SOC_DAPM_STREAM_START)
1078 NULL, SND_SOC_DAPM_PRE_PMU);
1079 else if (event == SND_SOC_DAPM_STREAM_STOP)
1081 NULL, SND_SOC_DAPM_PRE_PMD);
1084 case snd_soc_dapm_post:
1086 list_for_each_entry_safe_continue(w, n, list,
1089 if (event == SND_SOC_DAPM_STREAM_START)
1091 NULL, SND_SOC_DAPM_POST_PMU);
1092 else if (event == SND_SOC_DAPM_STREAM_STOP)
1094 NULL, SND_SOC_DAPM_POST_PMD);
1098 /* Queue it up for application */
1099 cur_sort = sort[w->id];
1100 cur_subseq = w->subseq;
1103 list_move(&w->power_list, &pending);
1108 dev_err(w->dapm->dev,
1109 "Failed to apply widget power: %d\n", ret);
1112 if (!list_empty(&pending))
1113 dapm_seq_run_coalesced(cur_dapm, &pending);
1115 if (cur_dapm && cur_dapm->seq_notifier) {
1116 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1117 if (sort[i] == cur_sort)
1118 cur_dapm->seq_notifier(cur_dapm,
1123 static void dapm_widget_update(struct snd_soc_dapm_context *dapm)
1125 struct snd_soc_dapm_update *update = dapm->update;
1126 struct snd_soc_dapm_widget *w;
1135 (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
1136 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
1138 pr_err("%s DAPM pre-event failed: %d\n",
1142 ret = snd_soc_update_bits(w->codec, update->reg, update->mask,
1145 pr_err("%s DAPM update failed: %d\n", w->name, ret);
1148 (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1149 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1151 pr_err("%s DAPM post-event failed: %d\n",
1156 /* Async callback run prior to DAPM sequences - brings to _PREPARE if
1157 * they're changing state.
1159 static void dapm_pre_sequence_async(void *data, async_cookie_t cookie)
1161 struct snd_soc_dapm_context *d = data;
1164 /* If we're off and we're not supposed to be go into STANDBY */
1165 if (d->bias_level == SND_SOC_BIAS_OFF &&
1166 d->target_bias_level != SND_SOC_BIAS_OFF) {
1167 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1170 "Failed to turn on bias: %d\n", ret);
1173 /* Prepare for a STADDBY->ON or ON->STANDBY transition */
1174 if (d->bias_level != d->target_bias_level) {
1175 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);
1178 "Failed to prepare bias: %d\n", ret);
1182 /* Async callback run prior to DAPM sequences - brings to their final
1185 static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
1187 struct snd_soc_dapm_context *d = data;
1190 /* If we just powered the last thing off drop to standby bias */
1191 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1192 (d->target_bias_level == SND_SOC_BIAS_STANDBY ||
1193 d->target_bias_level == SND_SOC_BIAS_OFF)) {
1194 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1196 dev_err(d->dev, "Failed to apply standby bias: %d\n",
1200 /* If we're in standby and can support bias off then do that */
1201 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1202 d->target_bias_level == SND_SOC_BIAS_OFF) {
1203 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);
1205 dev_err(d->dev, "Failed to turn off bias: %d\n", ret);
1208 /* If we just powered up then move to active bias */
1209 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1210 d->target_bias_level == SND_SOC_BIAS_ON) {
1211 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);
1213 dev_err(d->dev, "Failed to apply active bias: %d\n",
1218 static void dapm_widget_set_peer_power(struct snd_soc_dapm_widget *peer,
1219 bool power, bool connect)
1221 /* If a connection is being made or broken then that update
1222 * will have marked the peer dirty, otherwise the widgets are
1223 * not connected and this update has no impact. */
1227 /* If the peer is already in the state we're moving to then we
1228 * won't have an impact on it. */
1229 if (power != peer->power)
1230 dapm_mark_dirty(peer);
1233 static void dapm_widget_set_power(struct snd_soc_dapm_widget *w, bool power,
1234 struct list_head *up_list,
1235 struct list_head *down_list)
1237 struct snd_soc_dapm_path *path;
1239 if (w->power == power)
1242 trace_snd_soc_dapm_widget_power(w, power);
1244 /* If we changed our power state perhaps our neigbours changed
1247 list_for_each_entry(path, &w->sources, list_sink) {
1249 dapm_widget_set_peer_power(path->source, power,
1253 list_for_each_entry(path, &w->sinks, list_source) {
1255 dapm_widget_set_peer_power(path->sink, power,
1261 dapm_seq_insert(w, up_list, true);
1263 dapm_seq_insert(w, down_list, false);
1268 static void dapm_power_one_widget(struct snd_soc_dapm_widget *w,
1269 struct list_head *up_list,
1270 struct list_head *down_list)
1275 case snd_soc_dapm_pre:
1276 dapm_seq_insert(w, down_list, false);
1278 case snd_soc_dapm_post:
1279 dapm_seq_insert(w, up_list, true);
1283 power = dapm_widget_power_check(w);
1285 dapm_widget_set_power(w, power, up_list, down_list);
1291 * Scan each dapm widget for complete audio path.
1292 * A complete path is a route that has valid endpoints i.e.:-
1294 * o DAC to output pin.
1295 * o Input Pin to ADC.
1296 * o Input pin to Output pin (bypass, sidetone)
1297 * o DAC to ADC (loopback).
1299 static int dapm_power_widgets(struct snd_soc_dapm_context *dapm, int event)
1301 struct snd_soc_card *card = dapm->card;
1302 struct snd_soc_dapm_widget *w;
1303 struct snd_soc_dapm_context *d;
1305 LIST_HEAD(down_list);
1306 LIST_HEAD(async_domain);
1307 enum snd_soc_bias_level bias;
1309 trace_snd_soc_dapm_start(card);
1311 list_for_each_entry(d, &card->dapm_list, list) {
1312 if (d->n_widgets || d->codec == NULL) {
1313 if (d->idle_bias_off)
1314 d->target_bias_level = SND_SOC_BIAS_OFF;
1316 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1320 memset(&card->dapm_stats, 0, sizeof(card->dapm_stats));
1322 /* Check which widgets we need to power and store them in
1323 * lists indicating if they should be powered up or down. We
1324 * only check widgets that have been flagged as dirty but note
1325 * that new widgets may be added to the dirty list while we
1328 list_for_each_entry(w, &card->dapm_dirty, dirty) {
1329 dapm_power_one_widget(w, &up_list, &down_list);
1332 list_for_each_entry(w, &card->widgets, list) {
1333 list_del_init(&w->dirty);
1338 /* Supplies and micbiases only bring the
1339 * context up to STANDBY as unless something
1340 * else is active and passing audio they
1341 * generally don't require full power.
1344 case snd_soc_dapm_supply:
1345 case snd_soc_dapm_micbias:
1346 if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
1347 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1350 d->target_bias_level = SND_SOC_BIAS_ON;
1357 /* If there are no DAPM widgets then try to figure out power from the
1360 if (!dapm->n_widgets) {
1362 case SND_SOC_DAPM_STREAM_START:
1363 case SND_SOC_DAPM_STREAM_RESUME:
1364 dapm->target_bias_level = SND_SOC_BIAS_ON;
1366 case SND_SOC_DAPM_STREAM_STOP:
1367 if (dapm->codec->active)
1368 dapm->target_bias_level = SND_SOC_BIAS_ON;
1370 dapm->target_bias_level = SND_SOC_BIAS_STANDBY;
1372 case SND_SOC_DAPM_STREAM_SUSPEND:
1373 dapm->target_bias_level = SND_SOC_BIAS_STANDBY;
1375 case SND_SOC_DAPM_STREAM_NOP:
1376 dapm->target_bias_level = dapm->bias_level;
1383 /* Force all contexts in the card to the same bias state if
1384 * they're not ground referenced.
1386 bias = SND_SOC_BIAS_OFF;
1387 list_for_each_entry(d, &card->dapm_list, list)
1388 if (d->target_bias_level > bias)
1389 bias = d->target_bias_level;
1390 list_for_each_entry(d, &card->dapm_list, list)
1391 if (!d->idle_bias_off)
1392 d->target_bias_level = bias;
1394 trace_snd_soc_dapm_walk_done(card);
1396 /* Run all the bias changes in parallel */
1397 list_for_each_entry(d, &dapm->card->dapm_list, list)
1398 async_schedule_domain(dapm_pre_sequence_async, d,
1400 async_synchronize_full_domain(&async_domain);
1402 /* Power down widgets first; try to avoid amplifying pops. */
1403 dapm_seq_run(dapm, &down_list, event, false);
1405 dapm_widget_update(dapm);
1408 dapm_seq_run(dapm, &up_list, event, true);
1410 /* Run all the bias changes in parallel */
1411 list_for_each_entry(d, &dapm->card->dapm_list, list)
1412 async_schedule_domain(dapm_post_sequence_async, d,
1414 async_synchronize_full_domain(&async_domain);
1416 pop_dbg(dapm->dev, card->pop_time,
1417 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
1418 pop_wait(card->pop_time);
1420 trace_snd_soc_dapm_done(card);
1425 #ifdef CONFIG_DEBUG_FS
1426 static int dapm_widget_power_open_file(struct inode *inode, struct file *file)
1428 file->private_data = inode->i_private;
1432 static ssize_t dapm_widget_power_read_file(struct file *file,
1433 char __user *user_buf,
1434 size_t count, loff_t *ppos)
1436 struct snd_soc_dapm_widget *w = file->private_data;
1440 struct snd_soc_dapm_path *p = NULL;
1442 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1446 in = is_connected_input_ep(w);
1447 dapm_clear_walk(w->dapm);
1448 out = is_connected_output_ep(w);
1449 dapm_clear_walk(w->dapm);
1451 ret = snprintf(buf, PAGE_SIZE, "%s: %s in %d out %d",
1452 w->name, w->power ? "On" : "Off", in, out);
1455 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1456 " - R%d(0x%x) bit %d",
1457 w->reg, w->reg, w->shift);
1459 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1462 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1464 w->active ? "active" : "inactive");
1466 list_for_each_entry(p, &w->sources, list_sink) {
1467 if (p->connected && !p->connected(w, p->sink))
1471 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1472 " in \"%s\" \"%s\"\n",
1473 p->name ? p->name : "static",
1476 list_for_each_entry(p, &w->sinks, list_source) {
1477 if (p->connected && !p->connected(w, p->sink))
1481 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1482 " out \"%s\" \"%s\"\n",
1483 p->name ? p->name : "static",
1487 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1493 static const struct file_operations dapm_widget_power_fops = {
1494 .open = dapm_widget_power_open_file,
1495 .read = dapm_widget_power_read_file,
1496 .llseek = default_llseek,
1499 static int dapm_bias_open_file(struct inode *inode, struct file *file)
1501 file->private_data = inode->i_private;
1505 static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
1506 size_t count, loff_t *ppos)
1508 struct snd_soc_dapm_context *dapm = file->private_data;
1511 switch (dapm->bias_level) {
1512 case SND_SOC_BIAS_ON:
1515 case SND_SOC_BIAS_PREPARE:
1516 level = "Prepare\n";
1518 case SND_SOC_BIAS_STANDBY:
1519 level = "Standby\n";
1521 case SND_SOC_BIAS_OFF:
1526 level = "Unknown\n";
1530 return simple_read_from_buffer(user_buf, count, ppos, level,
1534 static const struct file_operations dapm_bias_fops = {
1535 .open = dapm_bias_open_file,
1536 .read = dapm_bias_read_file,
1537 .llseek = default_llseek,
1540 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1541 struct dentry *parent)
1545 dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
1547 if (!dapm->debugfs_dapm) {
1549 "Failed to create DAPM debugfs directory\n");
1553 d = debugfs_create_file("bias_level", 0444,
1554 dapm->debugfs_dapm, dapm,
1558 "ASoC: Failed to create bias level debugfs file\n");
1561 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1563 struct snd_soc_dapm_context *dapm = w->dapm;
1566 if (!dapm->debugfs_dapm || !w->name)
1569 d = debugfs_create_file(w->name, 0444,
1570 dapm->debugfs_dapm, w,
1571 &dapm_widget_power_fops);
1573 dev_warn(w->dapm->dev,
1574 "ASoC: Failed to create %s debugfs file\n",
1578 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1580 debugfs_remove_recursive(dapm->debugfs_dapm);
1584 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1585 struct dentry *parent)
1589 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1593 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1599 /* test and update the power status of a mux widget */
1600 static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1601 struct snd_kcontrol *kcontrol, int change,
1602 int mux, struct soc_enum *e)
1604 struct snd_soc_dapm_path *path;
1607 if (widget->id != snd_soc_dapm_mux &&
1608 widget->id != snd_soc_dapm_virt_mux &&
1609 widget->id != snd_soc_dapm_value_mux)
1615 /* find dapm widget path assoc with kcontrol */
1616 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1617 if (path->kcontrol != kcontrol)
1620 if (!path->name || !e->texts[mux])
1624 /* we now need to match the string in the enum to the path */
1625 if (!(strcmp(path->name, e->texts[mux]))) {
1626 path->connect = 1; /* new connection */
1627 dapm_mark_dirty(path->source);
1630 dapm_mark_dirty(path->source);
1631 path->connect = 0; /* old connection must be powered down */
1636 dapm_mark_dirty(widget);
1637 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1643 /* test and update the power status of a mixer or switch widget */
1644 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1645 struct snd_kcontrol *kcontrol, int connect)
1647 struct snd_soc_dapm_path *path;
1650 if (widget->id != snd_soc_dapm_mixer &&
1651 widget->id != snd_soc_dapm_mixer_named_ctl &&
1652 widget->id != snd_soc_dapm_switch)
1655 /* find dapm widget path assoc with kcontrol */
1656 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1657 if (path->kcontrol != kcontrol)
1660 /* found, now check type */
1662 path->connect = connect;
1663 dapm_mark_dirty(path->source);
1667 dapm_mark_dirty(widget);
1668 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1674 /* show dapm widget status in sys fs */
1675 static ssize_t dapm_widget_show(struct device *dev,
1676 struct device_attribute *attr, char *buf)
1678 struct snd_soc_pcm_runtime *rtd =
1679 container_of(dev, struct snd_soc_pcm_runtime, dev);
1680 struct snd_soc_codec *codec =rtd->codec;
1681 struct snd_soc_dapm_widget *w;
1683 char *state = "not set";
1685 list_for_each_entry(w, &codec->card->widgets, list) {
1686 if (w->dapm != &codec->dapm)
1689 /* only display widgets that burnm power */
1691 case snd_soc_dapm_hp:
1692 case snd_soc_dapm_mic:
1693 case snd_soc_dapm_spk:
1694 case snd_soc_dapm_line:
1695 case snd_soc_dapm_micbias:
1696 case snd_soc_dapm_dac:
1697 case snd_soc_dapm_adc:
1698 case snd_soc_dapm_pga:
1699 case snd_soc_dapm_out_drv:
1700 case snd_soc_dapm_mixer:
1701 case snd_soc_dapm_mixer_named_ctl:
1702 case snd_soc_dapm_supply:
1704 count += sprintf(buf + count, "%s: %s\n",
1705 w->name, w->power ? "On":"Off");
1712 switch (codec->dapm.bias_level) {
1713 case SND_SOC_BIAS_ON:
1716 case SND_SOC_BIAS_PREPARE:
1719 case SND_SOC_BIAS_STANDBY:
1722 case SND_SOC_BIAS_OFF:
1726 count += sprintf(buf + count, "PM State: %s\n", state);
1731 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
1733 int snd_soc_dapm_sys_add(struct device *dev)
1735 return device_create_file(dev, &dev_attr_dapm_widget);
1738 static void snd_soc_dapm_sys_remove(struct device *dev)
1740 device_remove_file(dev, &dev_attr_dapm_widget);
1743 /* free all dapm widgets and resources */
1744 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
1746 struct snd_soc_dapm_widget *w, *next_w;
1747 struct snd_soc_dapm_path *p, *next_p;
1749 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
1750 if (w->dapm != dapm)
1754 * remove source and sink paths associated to this widget.
1755 * While removing the path, remove reference to it from both
1756 * source and sink widgets so that path is removed only once.
1758 list_for_each_entry_safe(p, next_p, &w->sources, list_sink) {
1759 list_del(&p->list_sink);
1760 list_del(&p->list_source);
1762 kfree(p->long_name);
1765 list_for_each_entry_safe(p, next_p, &w->sinks, list_source) {
1766 list_del(&p->list_sink);
1767 list_del(&p->list_source);
1769 kfree(p->long_name);
1772 kfree(w->kcontrols);
1778 static struct snd_soc_dapm_widget *dapm_find_widget(
1779 struct snd_soc_dapm_context *dapm, const char *pin,
1780 bool search_other_contexts)
1782 struct snd_soc_dapm_widget *w;
1783 struct snd_soc_dapm_widget *fallback = NULL;
1785 list_for_each_entry(w, &dapm->card->widgets, list) {
1786 if (!strcmp(w->name, pin)) {
1787 if (w->dapm == dapm)
1794 if (search_other_contexts)
1800 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
1801 const char *pin, int status)
1803 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
1806 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
1810 w->connected = status;
1819 * snd_soc_dapm_sync - scan and power dapm paths
1820 * @dapm: DAPM context
1822 * Walks all dapm audio paths and powers widgets according to their
1823 * stream or path usage.
1825 * Returns 0 for success.
1827 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
1829 return dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
1831 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
1833 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
1834 const struct snd_soc_dapm_route *route)
1836 struct snd_soc_dapm_path *path;
1837 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
1838 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
1840 const char *control = route->control;
1842 char prefixed_sink[80];
1843 char prefixed_source[80];
1846 if (dapm->codec && dapm->codec->name_prefix) {
1847 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
1848 dapm->codec->name_prefix, route->sink);
1849 sink = prefixed_sink;
1850 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
1851 dapm->codec->name_prefix, route->source);
1852 source = prefixed_source;
1855 source = route->source;
1859 * find src and dest widgets over all widgets but favor a widget from
1860 * current DAPM context
1862 list_for_each_entry(w, &dapm->card->widgets, list) {
1863 if (!wsink && !(strcmp(w->name, sink))) {
1865 if (w->dapm == dapm)
1869 if (!wsource && !(strcmp(w->name, source))) {
1871 if (w->dapm == dapm)
1875 /* use widget from another DAPM context if not found from this */
1881 if (wsource == NULL || wsink == NULL)
1884 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
1888 path->source = wsource;
1890 path->connected = route->connected;
1891 INIT_LIST_HEAD(&path->list);
1892 INIT_LIST_HEAD(&path->list_source);
1893 INIT_LIST_HEAD(&path->list_sink);
1895 /* check for external widgets */
1896 if (wsink->id == snd_soc_dapm_input) {
1897 if (wsource->id == snd_soc_dapm_micbias ||
1898 wsource->id == snd_soc_dapm_mic ||
1899 wsource->id == snd_soc_dapm_line ||
1900 wsource->id == snd_soc_dapm_output)
1903 if (wsource->id == snd_soc_dapm_output) {
1904 if (wsink->id == snd_soc_dapm_spk ||
1905 wsink->id == snd_soc_dapm_hp ||
1906 wsink->id == snd_soc_dapm_line ||
1907 wsink->id == snd_soc_dapm_input)
1911 /* connect static paths */
1912 if (control == NULL) {
1913 list_add(&path->list, &dapm->card->paths);
1914 list_add(&path->list_sink, &wsink->sources);
1915 list_add(&path->list_source, &wsource->sinks);
1920 /* connect dynamic paths */
1921 switch (wsink->id) {
1922 case snd_soc_dapm_adc:
1923 case snd_soc_dapm_dac:
1924 case snd_soc_dapm_pga:
1925 case snd_soc_dapm_out_drv:
1926 case snd_soc_dapm_input:
1927 case snd_soc_dapm_output:
1928 case snd_soc_dapm_micbias:
1929 case snd_soc_dapm_vmid:
1930 case snd_soc_dapm_pre:
1931 case snd_soc_dapm_post:
1932 case snd_soc_dapm_supply:
1933 case snd_soc_dapm_aif_in:
1934 case snd_soc_dapm_aif_out:
1935 list_add(&path->list, &dapm->card->paths);
1936 list_add(&path->list_sink, &wsink->sources);
1937 list_add(&path->list_source, &wsource->sinks);
1940 case snd_soc_dapm_mux:
1941 case snd_soc_dapm_virt_mux:
1942 case snd_soc_dapm_value_mux:
1943 ret = dapm_connect_mux(dapm, wsource, wsink, path, control,
1944 &wsink->kcontrol_news[0]);
1948 case snd_soc_dapm_switch:
1949 case snd_soc_dapm_mixer:
1950 case snd_soc_dapm_mixer_named_ctl:
1951 ret = dapm_connect_mixer(dapm, wsource, wsink, path, control);
1955 case snd_soc_dapm_hp:
1956 case snd_soc_dapm_mic:
1957 case snd_soc_dapm_line:
1958 case snd_soc_dapm_spk:
1959 list_add(&path->list, &dapm->card->paths);
1960 list_add(&path->list_sink, &wsink->sources);
1961 list_add(&path->list_source, &wsource->sinks);
1968 dev_warn(dapm->dev, "asoc: no dapm match for %s --> %s --> %s\n",
1969 source, control, sink);
1975 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1976 * @dapm: DAPM context
1977 * @route: audio routes
1978 * @num: number of routes
1980 * Connects 2 dapm widgets together via a named audio path. The sink is
1981 * the widget receiving the audio signal, whilst the source is the sender
1982 * of the audio signal.
1984 * Returns 0 for success else error. On error all resources can be freed
1985 * with a call to snd_soc_card_free().
1987 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
1988 const struct snd_soc_dapm_route *route, int num)
1992 for (i = 0; i < num; i++) {
1993 ret = snd_soc_dapm_add_route(dapm, route);
1995 dev_err(dapm->dev, "Failed to add route %s->%s\n",
1996 route->source, route->sink);
2004 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
2006 static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm,
2007 const struct snd_soc_dapm_route *route)
2009 struct snd_soc_dapm_widget *source = dapm_find_widget(dapm,
2012 struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm,
2015 struct snd_soc_dapm_path *path;
2019 dev_err(dapm->dev, "Unable to find source %s for weak route\n",
2025 dev_err(dapm->dev, "Unable to find sink %s for weak route\n",
2030 if (route->control || route->connected)
2031 dev_warn(dapm->dev, "Ignoring control for weak route %s->%s\n",
2032 route->source, route->sink);
2034 list_for_each_entry(path, &source->sinks, list_source) {
2035 if (path->sink == sink) {
2042 dev_err(dapm->dev, "No path found for weak route %s->%s\n",
2043 route->source, route->sink);
2045 dev_warn(dapm->dev, "%d paths found for weak route %s->%s\n",
2046 count, route->source, route->sink);
2052 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
2053 * @dapm: DAPM context
2054 * @route: audio routes
2055 * @num: number of routes
2057 * Mark existing routes matching those specified in the passed array
2058 * as being weak, meaning that they are ignored for the purpose of
2059 * power decisions. The main intended use case is for sidetone paths
2060 * which couple audio between other independent paths if they are both
2061 * active in order to make the combination work better at the user
2062 * level but which aren't intended to be "used".
2064 * Note that CODEC drivers should not use this as sidetone type paths
2065 * can frequently also be used as bypass paths.
2067 int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm,
2068 const struct snd_soc_dapm_route *route, int num)
2073 for (i = 0; i < num; i++) {
2074 err = snd_soc_dapm_weak_route(dapm, route);
2082 EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes);
2085 * snd_soc_dapm_new_widgets - add new dapm widgets
2086 * @dapm: DAPM context
2088 * Checks the codec for any new dapm widgets and creates them if found.
2090 * Returns 0 for success.
2092 int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context *dapm)
2094 struct snd_soc_dapm_widget *w;
2097 list_for_each_entry(w, &dapm->card->widgets, list)
2102 if (w->num_kcontrols) {
2103 w->kcontrols = kzalloc(w->num_kcontrols *
2104 sizeof(struct snd_kcontrol *),
2111 case snd_soc_dapm_switch:
2112 case snd_soc_dapm_mixer:
2113 case snd_soc_dapm_mixer_named_ctl:
2114 w->power_check = dapm_generic_check_power;
2117 case snd_soc_dapm_mux:
2118 case snd_soc_dapm_virt_mux:
2119 case snd_soc_dapm_value_mux:
2120 w->power_check = dapm_generic_check_power;
2123 case snd_soc_dapm_adc:
2124 case snd_soc_dapm_aif_out:
2125 w->power_check = dapm_adc_check_power;
2127 case snd_soc_dapm_dac:
2128 case snd_soc_dapm_aif_in:
2129 w->power_check = dapm_dac_check_power;
2131 case snd_soc_dapm_pga:
2132 case snd_soc_dapm_out_drv:
2133 w->power_check = dapm_generic_check_power;
2136 case snd_soc_dapm_input:
2137 case snd_soc_dapm_output:
2138 case snd_soc_dapm_micbias:
2139 case snd_soc_dapm_spk:
2140 case snd_soc_dapm_hp:
2141 case snd_soc_dapm_mic:
2142 case snd_soc_dapm_line:
2143 w->power_check = dapm_generic_check_power;
2145 case snd_soc_dapm_supply:
2146 w->power_check = dapm_supply_check_power;
2147 case snd_soc_dapm_vmid:
2148 case snd_soc_dapm_pre:
2149 case snd_soc_dapm_post:
2153 if (!w->power_check)
2154 w->power_check = dapm_always_on_check_power;
2156 /* Read the initial power state from the device */
2158 val = soc_widget_read(w, w->reg);
2159 val &= 1 << w->shift;
2169 list_add(&w->dirty, &(w->dapm->card->dapm_dirty));
2170 dapm_debugfs_add_widget(w);
2173 dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
2176 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
2179 * snd_soc_dapm_get_volsw - dapm mixer get callback
2180 * @kcontrol: mixer control
2181 * @ucontrol: control element information
2183 * Callback to get the value of a dapm mixer control.
2185 * Returns 0 for success.
2187 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
2188 struct snd_ctl_elem_value *ucontrol)
2190 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2191 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2192 struct soc_mixer_control *mc =
2193 (struct soc_mixer_control *)kcontrol->private_value;
2194 unsigned int reg = mc->reg;
2195 unsigned int shift = mc->shift;
2196 unsigned int rshift = mc->rshift;
2198 unsigned int invert = mc->invert;
2199 unsigned int mask = (1 << fls(max)) - 1;
2201 ucontrol->value.integer.value[0] =
2202 (snd_soc_read(widget->codec, reg) >> shift) & mask;
2203 if (shift != rshift)
2204 ucontrol->value.integer.value[1] =
2205 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
2207 ucontrol->value.integer.value[0] =
2208 max - ucontrol->value.integer.value[0];
2209 if (shift != rshift)
2210 ucontrol->value.integer.value[1] =
2211 max - ucontrol->value.integer.value[1];
2216 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
2219 * snd_soc_dapm_put_volsw - dapm mixer set callback
2220 * @kcontrol: mixer control
2221 * @ucontrol: control element information
2223 * Callback to set the value of a dapm mixer control.
2225 * Returns 0 for success.
2227 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
2228 struct snd_ctl_elem_value *ucontrol)
2230 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2231 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2232 struct snd_soc_codec *codec = widget->codec;
2233 struct soc_mixer_control *mc =
2234 (struct soc_mixer_control *)kcontrol->private_value;
2235 unsigned int reg = mc->reg;
2236 unsigned int shift = mc->shift;
2238 unsigned int mask = (1 << fls(max)) - 1;
2239 unsigned int invert = mc->invert;
2241 int connect, change;
2242 struct snd_soc_dapm_update update;
2245 val = (ucontrol->value.integer.value[0] & mask);
2249 mask = mask << shift;
2253 /* new connection */
2254 connect = invert ? 0 : 1;
2256 /* old connection must be powered down */
2257 connect = invert ? 1 : 0;
2259 mutex_lock(&codec->mutex);
2261 change = snd_soc_test_bits(widget->codec, reg, mask, val);
2263 for (wi = 0; wi < wlist->num_widgets; wi++) {
2264 widget = wlist->widgets[wi];
2266 widget->value = val;
2268 update.kcontrol = kcontrol;
2269 update.widget = widget;
2273 widget->dapm->update = &update;
2275 dapm_mixer_update_power(widget, kcontrol, connect);
2277 widget->dapm->update = NULL;
2281 mutex_unlock(&codec->mutex);
2284 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
2287 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
2288 * @kcontrol: mixer control
2289 * @ucontrol: control element information
2291 * Callback to get the value of a dapm enumerated double mixer control.
2293 * Returns 0 for success.
2295 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
2296 struct snd_ctl_elem_value *ucontrol)
2298 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2299 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2300 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2301 unsigned int val, bitmask;
2303 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2305 val = snd_soc_read(widget->codec, e->reg);
2306 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
2307 if (e->shift_l != e->shift_r)
2308 ucontrol->value.enumerated.item[1] =
2309 (val >> e->shift_r) & (bitmask - 1);
2313 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
2316 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
2317 * @kcontrol: mixer control
2318 * @ucontrol: control element information
2320 * Callback to set the value of a dapm enumerated double mixer control.
2322 * Returns 0 for success.
2324 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
2325 struct snd_ctl_elem_value *ucontrol)
2327 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2328 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2329 struct snd_soc_codec *codec = widget->codec;
2330 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2331 unsigned int val, mux, change;
2332 unsigned int mask, bitmask;
2333 struct snd_soc_dapm_update update;
2336 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2338 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2340 mux = ucontrol->value.enumerated.item[0];
2341 val = mux << e->shift_l;
2342 mask = (bitmask - 1) << e->shift_l;
2343 if (e->shift_l != e->shift_r) {
2344 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2346 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2347 mask |= (bitmask - 1) << e->shift_r;
2350 mutex_lock(&codec->mutex);
2352 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2354 for (wi = 0; wi < wlist->num_widgets; wi++) {
2355 widget = wlist->widgets[wi];
2357 widget->value = val;
2359 update.kcontrol = kcontrol;
2360 update.widget = widget;
2361 update.reg = e->reg;
2364 widget->dapm->update = &update;
2366 dapm_mux_update_power(widget, kcontrol, change, mux, e);
2368 widget->dapm->update = NULL;
2372 mutex_unlock(&codec->mutex);
2375 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
2378 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
2379 * @kcontrol: mixer control
2380 * @ucontrol: control element information
2382 * Returns 0 for success.
2384 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
2385 struct snd_ctl_elem_value *ucontrol)
2387 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2388 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2390 ucontrol->value.enumerated.item[0] = widget->value;
2394 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt);
2397 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
2398 * @kcontrol: mixer control
2399 * @ucontrol: control element information
2401 * Returns 0 for success.
2403 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
2404 struct snd_ctl_elem_value *ucontrol)
2406 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2407 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2408 struct snd_soc_codec *codec = widget->codec;
2409 struct soc_enum *e =
2410 (struct soc_enum *)kcontrol->private_value;
2415 if (ucontrol->value.enumerated.item[0] >= e->max)
2418 mutex_lock(&codec->mutex);
2420 change = widget->value != ucontrol->value.enumerated.item[0];
2422 for (wi = 0; wi < wlist->num_widgets; wi++) {
2423 widget = wlist->widgets[wi];
2425 widget->value = ucontrol->value.enumerated.item[0];
2427 dapm_mux_update_power(widget, kcontrol, change,
2432 mutex_unlock(&codec->mutex);
2435 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt);
2438 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
2440 * @kcontrol: mixer control
2441 * @ucontrol: control element information
2443 * Callback to get the value of a dapm semi enumerated double mixer control.
2445 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2446 * used for handling bitfield coded enumeration for example.
2448 * Returns 0 for success.
2450 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
2451 struct snd_ctl_elem_value *ucontrol)
2453 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2454 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2455 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2456 unsigned int reg_val, val, mux;
2458 reg_val = snd_soc_read(widget->codec, e->reg);
2459 val = (reg_val >> e->shift_l) & e->mask;
2460 for (mux = 0; mux < e->max; mux++) {
2461 if (val == e->values[mux])
2464 ucontrol->value.enumerated.item[0] = mux;
2465 if (e->shift_l != e->shift_r) {
2466 val = (reg_val >> e->shift_r) & e->mask;
2467 for (mux = 0; mux < e->max; mux++) {
2468 if (val == e->values[mux])
2471 ucontrol->value.enumerated.item[1] = mux;
2476 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
2479 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
2481 * @kcontrol: mixer control
2482 * @ucontrol: control element information
2484 * Callback to set the value of a dapm semi enumerated double mixer control.
2486 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2487 * used for handling bitfield coded enumeration for example.
2489 * Returns 0 for success.
2491 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
2492 struct snd_ctl_elem_value *ucontrol)
2494 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2495 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2496 struct snd_soc_codec *codec = widget->codec;
2497 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2498 unsigned int val, mux, change;
2500 struct snd_soc_dapm_update update;
2503 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2505 mux = ucontrol->value.enumerated.item[0];
2506 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2507 mask = e->mask << e->shift_l;
2508 if (e->shift_l != e->shift_r) {
2509 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2511 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2512 mask |= e->mask << e->shift_r;
2515 mutex_lock(&codec->mutex);
2517 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2519 for (wi = 0; wi < wlist->num_widgets; wi++) {
2520 widget = wlist->widgets[wi];
2522 widget->value = val;
2524 update.kcontrol = kcontrol;
2525 update.widget = widget;
2526 update.reg = e->reg;
2529 widget->dapm->update = &update;
2531 dapm_mux_update_power(widget, kcontrol, change, mux, e);
2533 widget->dapm->update = NULL;
2537 mutex_unlock(&codec->mutex);
2540 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
2543 * snd_soc_dapm_info_pin_switch - Info for a pin switch
2545 * @kcontrol: mixer control
2546 * @uinfo: control element information
2548 * Callback to provide information about a pin switch control.
2550 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
2551 struct snd_ctl_elem_info *uinfo)
2553 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2555 uinfo->value.integer.min = 0;
2556 uinfo->value.integer.max = 1;
2560 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
2563 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
2565 * @kcontrol: mixer control
2568 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
2569 struct snd_ctl_elem_value *ucontrol)
2571 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2572 const char *pin = (const char *)kcontrol->private_value;
2574 mutex_lock(&codec->mutex);
2576 ucontrol->value.integer.value[0] =
2577 snd_soc_dapm_get_pin_status(&codec->dapm, pin);
2579 mutex_unlock(&codec->mutex);
2583 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
2586 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
2588 * @kcontrol: mixer control
2591 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
2592 struct snd_ctl_elem_value *ucontrol)
2594 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2595 const char *pin = (const char *)kcontrol->private_value;
2597 mutex_lock(&codec->mutex);
2599 if (ucontrol->value.integer.value[0])
2600 snd_soc_dapm_enable_pin(&codec->dapm, pin);
2602 snd_soc_dapm_disable_pin(&codec->dapm, pin);
2604 snd_soc_dapm_sync(&codec->dapm);
2606 mutex_unlock(&codec->mutex);
2610 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
2613 * snd_soc_dapm_new_control - create new dapm control
2614 * @dapm: DAPM context
2615 * @widget: widget template
2617 * Creates a new dapm control based upon the template.
2619 * Returns 0 for success else error.
2621 int snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
2622 const struct snd_soc_dapm_widget *widget)
2624 struct snd_soc_dapm_widget *w;
2627 if ((w = dapm_cnew_widget(widget)) == NULL)
2630 name_len = strlen(widget->name) + 1;
2631 if (dapm->codec && dapm->codec->name_prefix)
2632 name_len += 1 + strlen(dapm->codec->name_prefix);
2633 w->name = kmalloc(name_len, GFP_KERNEL);
2634 if (w->name == NULL) {
2638 if (dapm->codec && dapm->codec->name_prefix)
2639 snprintf(w->name, name_len, "%s %s",
2640 dapm->codec->name_prefix, widget->name);
2642 snprintf(w->name, name_len, "%s", widget->name);
2646 w->codec = dapm->codec;
2647 w->platform = dapm->platform;
2648 INIT_LIST_HEAD(&w->sources);
2649 INIT_LIST_HEAD(&w->sinks);
2650 INIT_LIST_HEAD(&w->list);
2651 INIT_LIST_HEAD(&w->dirty);
2652 list_add(&w->list, &dapm->card->widgets);
2654 /* machine layer set ups unconnected pins and insertions */
2658 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
2661 * snd_soc_dapm_new_controls - create new dapm controls
2662 * @dapm: DAPM context
2663 * @widget: widget array
2664 * @num: number of widgets
2666 * Creates new DAPM controls based upon the templates.
2668 * Returns 0 for success else error.
2670 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
2671 const struct snd_soc_dapm_widget *widget,
2676 for (i = 0; i < num; i++) {
2677 ret = snd_soc_dapm_new_control(dapm, widget);
2680 "ASoC: Failed to create DAPM control %s: %d\n",
2688 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
2690 static void soc_dapm_stream_event(struct snd_soc_dapm_context *dapm,
2691 const char *stream, int event)
2693 struct snd_soc_dapm_widget *w;
2695 list_for_each_entry(w, &dapm->card->widgets, list)
2697 if (!w->sname || w->dapm != dapm)
2699 dev_vdbg(w->dapm->dev, "widget %s\n %s stream %s event %d\n",
2700 w->name, w->sname, stream, event);
2701 if (strstr(w->sname, stream)) {
2704 case SND_SOC_DAPM_STREAM_START:
2707 case SND_SOC_DAPM_STREAM_STOP:
2710 case SND_SOC_DAPM_STREAM_SUSPEND:
2711 case SND_SOC_DAPM_STREAM_RESUME:
2712 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
2713 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
2719 dapm_power_widgets(dapm, event);
2721 /* do we need to notify any clients that DAPM stream is complete */
2722 if (dapm->stream_event)
2723 dapm->stream_event(dapm, event);
2727 * snd_soc_dapm_stream_event - send a stream event to the dapm core
2728 * @rtd: PCM runtime data
2729 * @stream: stream name
2730 * @event: stream event
2732 * Sends a stream event to the dapm core. The core then makes any
2733 * necessary widget power changes.
2735 * Returns 0 for success else error.
2737 int snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd,
2738 const char *stream, int event)
2740 struct snd_soc_codec *codec = rtd->codec;
2745 mutex_lock(&codec->mutex);
2746 soc_dapm_stream_event(&codec->dapm, stream, event);
2747 mutex_unlock(&codec->mutex);
2752 * snd_soc_dapm_enable_pin - enable pin.
2753 * @dapm: DAPM context
2756 * Enables input/output pin and its parents or children widgets iff there is
2757 * a valid audio route and active audio stream.
2758 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2759 * do any widget power switching.
2761 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
2763 return snd_soc_dapm_set_pin(dapm, pin, 1);
2765 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
2768 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
2769 * @dapm: DAPM context
2772 * Enables input/output pin regardless of any other state. This is
2773 * intended for use with microphone bias supplies used in microphone
2776 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2777 * do any widget power switching.
2779 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
2782 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2785 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
2789 dev_dbg(w->dapm->dev, "dapm: force enable pin %s\n", pin);
2796 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
2799 * snd_soc_dapm_disable_pin - disable pin.
2800 * @dapm: DAPM context
2803 * Disables input/output pin and its parents or children widgets.
2804 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2805 * do any widget power switching.
2807 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
2810 return snd_soc_dapm_set_pin(dapm, pin, 0);
2812 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
2815 * snd_soc_dapm_nc_pin - permanently disable pin.
2816 * @dapm: DAPM context
2819 * Marks the specified pin as being not connected, disabling it along
2820 * any parent or child widgets. At present this is identical to
2821 * snd_soc_dapm_disable_pin() but in future it will be extended to do
2822 * additional things such as disabling controls which only affect
2823 * paths through the pin.
2825 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2826 * do any widget power switching.
2828 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
2830 return snd_soc_dapm_set_pin(dapm, pin, 0);
2832 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
2835 * snd_soc_dapm_get_pin_status - get audio pin status
2836 * @dapm: DAPM context
2837 * @pin: audio signal pin endpoint (or start point)
2839 * Get audio pin status - connected or disconnected.
2841 * Returns 1 for connected otherwise 0.
2843 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
2846 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2849 return w->connected;
2853 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
2856 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
2857 * @dapm: DAPM context
2858 * @pin: audio signal pin endpoint (or start point)
2860 * Mark the given endpoint or pin as ignoring suspend. When the
2861 * system is disabled a path between two endpoints flagged as ignoring
2862 * suspend will not be disabled. The path must already be enabled via
2863 * normal means at suspend time, it will not be turned on if it was not
2866 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
2869 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
2872 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
2876 w->ignore_suspend = 1;
2880 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
2883 * snd_soc_dapm_free - free dapm resources
2884 * @dapm: DAPM context
2886 * Free all dapm widgets and resources.
2888 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
2890 snd_soc_dapm_sys_remove(dapm->dev);
2891 dapm_debugfs_cleanup(dapm);
2892 dapm_free_widgets(dapm);
2893 list_del(&dapm->list);
2895 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
2897 static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context *dapm)
2899 struct snd_soc_dapm_widget *w;
2900 LIST_HEAD(down_list);
2903 list_for_each_entry(w, &dapm->card->widgets, list) {
2904 if (w->dapm != dapm)
2907 dapm_seq_insert(w, &down_list, false);
2913 /* If there were no widgets to power down we're already in
2917 snd_soc_dapm_set_bias_level(dapm, SND_SOC_BIAS_PREPARE);
2918 dapm_seq_run(dapm, &down_list, 0, false);
2919 snd_soc_dapm_set_bias_level(dapm, SND_SOC_BIAS_STANDBY);
2924 * snd_soc_dapm_shutdown - callback for system shutdown
2926 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
2928 struct snd_soc_codec *codec;
2930 list_for_each_entry(codec, &card->codec_dev_list, list) {
2931 soc_dapm_shutdown_codec(&codec->dapm);
2932 snd_soc_dapm_set_bias_level(&codec->dapm, SND_SOC_BIAS_OFF);
2936 /* Module information */
2937 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2938 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
2939 MODULE_LICENSE("GPL");