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 /* dapm power sequences - make this per codec in the future */
52 static int dapm_up_seq[] = {
53 [snd_soc_dapm_pre] = 0,
54 [snd_soc_dapm_supply] = 1,
55 [snd_soc_dapm_micbias] = 2,
56 [snd_soc_dapm_aif_in] = 3,
57 [snd_soc_dapm_aif_out] = 3,
58 [snd_soc_dapm_mic] = 4,
59 [snd_soc_dapm_mux] = 5,
60 [snd_soc_dapm_virt_mux] = 5,
61 [snd_soc_dapm_value_mux] = 5,
62 [snd_soc_dapm_dac] = 6,
63 [snd_soc_dapm_mixer] = 7,
64 [snd_soc_dapm_mixer_named_ctl] = 7,
65 [snd_soc_dapm_pga] = 8,
66 [snd_soc_dapm_adc] = 9,
67 [snd_soc_dapm_out_drv] = 10,
68 [snd_soc_dapm_hp] = 10,
69 [snd_soc_dapm_spk] = 10,
70 [snd_soc_dapm_post] = 11,
73 static int dapm_down_seq[] = {
74 [snd_soc_dapm_pre] = 0,
75 [snd_soc_dapm_adc] = 1,
76 [snd_soc_dapm_hp] = 2,
77 [snd_soc_dapm_spk] = 2,
78 [snd_soc_dapm_out_drv] = 2,
79 [snd_soc_dapm_pga] = 4,
80 [snd_soc_dapm_mixer_named_ctl] = 5,
81 [snd_soc_dapm_mixer] = 5,
82 [snd_soc_dapm_dac] = 6,
83 [snd_soc_dapm_mic] = 7,
84 [snd_soc_dapm_micbias] = 8,
85 [snd_soc_dapm_mux] = 9,
86 [snd_soc_dapm_virt_mux] = 9,
87 [snd_soc_dapm_value_mux] = 9,
88 [snd_soc_dapm_aif_in] = 10,
89 [snd_soc_dapm_aif_out] = 10,
90 [snd_soc_dapm_supply] = 11,
91 [snd_soc_dapm_post] = 12,
94 static void pop_wait(u32 pop_time)
97 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
100 static void pop_dbg(struct device *dev, u32 pop_time, const char *fmt, ...)
108 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
113 vsnprintf(buf, PAGE_SIZE, fmt, args);
114 dev_info(dev, "%s", buf);
120 /* create a new dapm widget */
121 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
122 const struct snd_soc_dapm_widget *_widget)
124 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
128 * snd_soc_dapm_set_bias_level - set the bias level for the system
129 * @dapm: DAPM context
130 * @level: level to configure
132 * Configure the bias (power) levels for the SoC audio device.
134 * Returns 0 for success else error.
136 static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm,
137 enum snd_soc_bias_level level)
139 struct snd_soc_card *card = dapm->card;
143 case SND_SOC_BIAS_ON:
144 dev_dbg(dapm->dev, "Setting full bias\n");
146 case SND_SOC_BIAS_PREPARE:
147 dev_dbg(dapm->dev, "Setting bias prepare\n");
149 case SND_SOC_BIAS_STANDBY:
150 dev_dbg(dapm->dev, "Setting standby bias\n");
152 case SND_SOC_BIAS_OFF:
153 dev_dbg(dapm->dev, "Setting bias off\n");
156 dev_err(dapm->dev, "Setting invalid bias %d\n", level);
160 trace_snd_soc_bias_level_start(card, level);
162 if (card && card->set_bias_level)
163 ret = card->set_bias_level(card, level);
165 if (dapm->codec && dapm->codec->driver->set_bias_level)
166 ret = dapm->codec->driver->set_bias_level(dapm->codec, level);
168 dapm->bias_level = level;
171 if (card && card->set_bias_level_post)
172 ret = card->set_bias_level_post(card, level);
175 trace_snd_soc_bias_level_done(card, level);
180 /* set up initial codec paths */
181 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
182 struct snd_soc_dapm_path *p, int i)
185 case snd_soc_dapm_switch:
186 case snd_soc_dapm_mixer:
187 case snd_soc_dapm_mixer_named_ctl: {
189 struct soc_mixer_control *mc = (struct soc_mixer_control *)
190 w->kcontrol_news[i].private_value;
191 unsigned int reg = mc->reg;
192 unsigned int shift = mc->shift;
194 unsigned int mask = (1 << fls(max)) - 1;
195 unsigned int invert = mc->invert;
197 val = snd_soc_read(w->codec, reg);
198 val = (val >> shift) & mask;
200 if ((invert && !val) || (!invert && val))
206 case snd_soc_dapm_mux: {
207 struct soc_enum *e = (struct soc_enum *)
208 w->kcontrol_news[i].private_value;
209 int val, item, bitmask;
211 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
213 val = snd_soc_read(w->codec, e->reg);
214 item = (val >> e->shift_l) & (bitmask - 1);
217 for (i = 0; i < e->max; i++) {
218 if (!(strcmp(p->name, e->texts[i])) && item == i)
223 case snd_soc_dapm_virt_mux: {
224 struct soc_enum *e = (struct soc_enum *)
225 w->kcontrol_news[i].private_value;
228 /* since a virtual mux has no backing registers to
229 * decide which path to connect, it will try to match
230 * with the first enumeration. This is to ensure
231 * that the default mux choice (the first) will be
232 * correctly powered up during initialization.
234 if (!strcmp(p->name, e->texts[0]))
238 case snd_soc_dapm_value_mux: {
239 struct soc_enum *e = (struct soc_enum *)
240 w->kcontrol_news[i].private_value;
243 val = snd_soc_read(w->codec, e->reg);
244 val = (val >> e->shift_l) & e->mask;
245 for (item = 0; item < e->max; item++) {
246 if (val == e->values[item])
251 for (i = 0; i < e->max; i++) {
252 if (!(strcmp(p->name, e->texts[i])) && item == i)
257 /* does not effect routing - always connected */
258 case snd_soc_dapm_pga:
259 case snd_soc_dapm_out_drv:
260 case snd_soc_dapm_output:
261 case snd_soc_dapm_adc:
262 case snd_soc_dapm_input:
263 case snd_soc_dapm_dac:
264 case snd_soc_dapm_micbias:
265 case snd_soc_dapm_vmid:
266 case snd_soc_dapm_supply:
267 case snd_soc_dapm_aif_in:
268 case snd_soc_dapm_aif_out:
271 /* does effect routing - dynamically connected */
272 case snd_soc_dapm_hp:
273 case snd_soc_dapm_mic:
274 case snd_soc_dapm_spk:
275 case snd_soc_dapm_line:
276 case snd_soc_dapm_pre:
277 case snd_soc_dapm_post:
283 /* connect mux widget to its interconnecting audio paths */
284 static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
285 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
286 struct snd_soc_dapm_path *path, const char *control_name,
287 const struct snd_kcontrol_new *kcontrol)
289 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
292 for (i = 0; i < e->max; i++) {
293 if (!(strcmp(control_name, e->texts[i]))) {
294 list_add(&path->list, &dapm->card->paths);
295 list_add(&path->list_sink, &dest->sources);
296 list_add(&path->list_source, &src->sinks);
297 path->name = (char*)e->texts[i];
298 dapm_set_path_status(dest, path, 0);
306 /* connect mixer widget to its interconnecting audio paths */
307 static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
308 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
309 struct snd_soc_dapm_path *path, const char *control_name)
313 /* search for mixer kcontrol */
314 for (i = 0; i < dest->num_kcontrols; i++) {
315 if (!strcmp(control_name, dest->kcontrol_news[i].name)) {
316 list_add(&path->list, &dapm->card->paths);
317 list_add(&path->list_sink, &dest->sources);
318 list_add(&path->list_source, &src->sinks);
319 path->name = dest->kcontrol_news[i].name;
320 dapm_set_path_status(dest, path, i);
327 static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm,
328 struct snd_soc_dapm_widget *kcontrolw,
329 const struct snd_kcontrol_new *kcontrol_new,
330 struct snd_kcontrol **kcontrol)
332 struct snd_soc_dapm_widget *w;
337 list_for_each_entry(w, &dapm->card->widgets, list) {
338 if (w == kcontrolw || w->dapm != kcontrolw->dapm)
340 for (i = 0; i < w->num_kcontrols; i++) {
341 if (&w->kcontrol_news[i] == kcontrol_new) {
343 *kcontrol = w->kcontrols[i];
352 /* create new dapm mixer control */
353 static int dapm_new_mixer(struct snd_soc_dapm_context *dapm,
354 struct snd_soc_dapm_widget *w)
357 size_t name_len, prefix_len;
358 struct snd_soc_dapm_path *path;
359 struct snd_card *card = dapm->card->snd_card;
361 struct snd_soc_dapm_widget_list *wlist;
365 prefix = dapm->codec->name_prefix;
370 prefix_len = strlen(prefix) + 1;
375 for (i = 0; i < w->num_kcontrols; i++) {
378 list_for_each_entry(path, &w->sources, list_sink) {
380 /* mixer/mux paths name must match control name */
381 if (path->name != (char *)w->kcontrol_news[i].name)
384 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
385 sizeof(struct snd_soc_dapm_widget *),
386 wlist = kzalloc(wlistsize, GFP_KERNEL);
389 "asoc: can't allocate widget list for %s\n",
393 wlist->num_widgets = 1;
394 wlist->widgets[0] = w;
396 /* add dapm control with long name.
397 * for dapm_mixer this is the concatenation of the
398 * mixer and kcontrol name.
399 * for dapm_mixer_named_ctl this is simply the
402 name_len = strlen(w->kcontrol_news[i].name) + 1;
403 if (w->id != snd_soc_dapm_mixer_named_ctl)
404 name_len += 1 + strlen(w->name);
406 path->long_name = kmalloc(name_len, GFP_KERNEL);
408 if (path->long_name == NULL) {
415 /* The control will get a prefix from
416 * the control creation process but
417 * we're also using the same prefix
418 * for widgets so cut the prefix off
419 * the front of the widget name.
421 snprintf(path->long_name, name_len, "%s %s",
422 w->name + prefix_len,
423 w->kcontrol_news[i].name);
425 case snd_soc_dapm_mixer_named_ctl:
426 snprintf(path->long_name, name_len, "%s",
427 w->kcontrol_news[i].name);
431 path->long_name[name_len - 1] = '\0';
433 path->kcontrol = snd_soc_cnew(&w->kcontrol_news[i],
434 wlist, path->long_name,
436 ret = snd_ctl_add(card, path->kcontrol);
439 "asoc: failed to add dapm kcontrol %s: %d\n",
440 path->long_name, ret);
442 kfree(path->long_name);
443 path->long_name = NULL;
446 w->kcontrols[i] = path->kcontrol;
452 /* create new dapm mux control */
453 static int dapm_new_mux(struct snd_soc_dapm_context *dapm,
454 struct snd_soc_dapm_widget *w)
456 struct snd_soc_dapm_path *path = NULL;
457 struct snd_kcontrol *kcontrol;
458 struct snd_card *card = dapm->card->snd_card;
462 struct snd_soc_dapm_widget_list *wlist;
463 int shared, wlistentries;
467 if (w->num_kcontrols != 1) {
469 "asoc: mux %s has incorrect number of controls\n",
474 shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[0],
477 wlist = kcontrol->private_data;
478 wlistentries = wlist->num_widgets + 1;
483 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
484 wlistentries * sizeof(struct snd_soc_dapm_widget *),
485 wlist = krealloc(wlist, wlistsize, GFP_KERNEL);
488 "asoc: can't allocate widget list for %s\n", w->name);
491 wlist->num_widgets = wlistentries;
492 wlist->widgets[wlistentries - 1] = w;
496 prefix = dapm->codec->name_prefix;
501 name = w->kcontrol_news[0].name;
506 prefix_len = strlen(prefix) + 1;
512 * The control will get a prefix from the control creation
513 * process but we're also using the same prefix for widgets so
514 * cut the prefix off the front of the widget name.
516 kcontrol = snd_soc_cnew(&w->kcontrol_news[0], wlist,
517 name + prefix_len, prefix);
518 ret = snd_ctl_add(card, kcontrol);
521 "asoc: failed to add kcontrol %s\n", w->name);
527 kcontrol->private_data = wlist;
529 w->kcontrols[0] = kcontrol;
531 list_for_each_entry(path, &w->sources, list_sink)
532 path->kcontrol = kcontrol;
537 /* create new dapm volume control */
538 static int dapm_new_pga(struct snd_soc_dapm_context *dapm,
539 struct snd_soc_dapm_widget *w)
541 if (w->num_kcontrols)
542 dev_err(w->dapm->dev,
543 "asoc: PGA controls not supported: '%s'\n", w->name);
548 /* reset 'walked' bit for each dapm path */
549 static inline void dapm_clear_walk(struct snd_soc_dapm_context *dapm)
551 struct snd_soc_dapm_path *p;
553 list_for_each_entry(p, &dapm->card->paths, list)
557 /* We implement power down on suspend by checking the power state of
558 * the ALSA card - when we are suspending the ALSA state for the card
561 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
563 int level = snd_power_get_state(widget->dapm->card->snd_card);
566 case SNDRV_CTL_POWER_D3hot:
567 case SNDRV_CTL_POWER_D3cold:
568 if (widget->ignore_suspend)
569 dev_dbg(widget->dapm->dev, "%s ignoring suspend\n",
571 return widget->ignore_suspend;
578 * Recursively check for a completed path to an active or physically connected
579 * output widget. Returns number of complete paths.
581 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
583 struct snd_soc_dapm_path *path;
586 if (widget->id == snd_soc_dapm_supply)
589 switch (widget->id) {
590 case snd_soc_dapm_adc:
591 case snd_soc_dapm_aif_out:
593 return snd_soc_dapm_suspend_check(widget);
598 if (widget->connected) {
599 /* connected pin ? */
600 if (widget->id == snd_soc_dapm_output && !widget->ext)
601 return snd_soc_dapm_suspend_check(widget);
603 /* connected jack or spk ? */
604 if (widget->id == snd_soc_dapm_hp || widget->id == snd_soc_dapm_spk ||
605 (widget->id == snd_soc_dapm_line && !list_empty(&widget->sources)))
606 return snd_soc_dapm_suspend_check(widget);
609 list_for_each_entry(path, &widget->sinks, list_source) {
613 if (path->sink && path->connect) {
615 con += is_connected_output_ep(path->sink);
623 * Recursively check for a completed path to an active or physically connected
624 * input widget. Returns number of complete paths.
626 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
628 struct snd_soc_dapm_path *path;
631 if (widget->id == snd_soc_dapm_supply)
634 /* active stream ? */
635 switch (widget->id) {
636 case snd_soc_dapm_dac:
637 case snd_soc_dapm_aif_in:
639 return snd_soc_dapm_suspend_check(widget);
644 if (widget->connected) {
645 /* connected pin ? */
646 if (widget->id == snd_soc_dapm_input && !widget->ext)
647 return snd_soc_dapm_suspend_check(widget);
649 /* connected VMID/Bias for lower pops */
650 if (widget->id == snd_soc_dapm_vmid)
651 return snd_soc_dapm_suspend_check(widget);
653 /* connected jack ? */
654 if (widget->id == snd_soc_dapm_mic ||
655 (widget->id == snd_soc_dapm_line && !list_empty(&widget->sinks)))
656 return snd_soc_dapm_suspend_check(widget);
659 list_for_each_entry(path, &widget->sources, list_sink) {
663 if (path->source && path->connect) {
665 con += is_connected_input_ep(path->source);
673 * Handler for generic register modifier widget.
675 int dapm_reg_event(struct snd_soc_dapm_widget *w,
676 struct snd_kcontrol *kcontrol, int event)
680 if (SND_SOC_DAPM_EVENT_ON(event))
685 snd_soc_update_bits(w->codec, -(w->reg + 1),
686 w->mask << w->shift, val << w->shift);
690 EXPORT_SYMBOL_GPL(dapm_reg_event);
692 /* Generic check to see if a widget should be powered.
694 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
698 in = is_connected_input_ep(w);
699 dapm_clear_walk(w->dapm);
700 out = is_connected_output_ep(w);
701 dapm_clear_walk(w->dapm);
702 return out != 0 && in != 0;
705 /* Check to see if an ADC has power */
706 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
711 in = is_connected_input_ep(w);
712 dapm_clear_walk(w->dapm);
715 return dapm_generic_check_power(w);
719 /* Check to see if a DAC has power */
720 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
725 out = is_connected_output_ep(w);
726 dapm_clear_walk(w->dapm);
729 return dapm_generic_check_power(w);
733 /* Check to see if a power supply is needed */
734 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
736 struct snd_soc_dapm_path *path;
739 /* Check if one of our outputs is connected */
740 list_for_each_entry(path, &w->sinks, list_source) {
741 if (path->connected &&
742 !path->connected(path->source, path->sink))
748 if (path->sink->force) {
753 if (path->sink->power_check &&
754 path->sink->power_check(path->sink)) {
760 dapm_clear_walk(w->dapm);
765 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
766 struct snd_soc_dapm_widget *b,
774 sort = dapm_down_seq;
776 if (sort[a->id] != sort[b->id])
777 return sort[a->id] - sort[b->id];
778 if (a->subseq != b->subseq) {
780 return a->subseq - b->subseq;
782 return b->subseq - a->subseq;
784 if (a->reg != b->reg)
785 return a->reg - b->reg;
786 if (a->dapm != b->dapm)
787 return (unsigned long)a->dapm - (unsigned long)b->dapm;
792 /* Insert a widget in order into a DAPM power sequence. */
793 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
794 struct list_head *list,
797 struct snd_soc_dapm_widget *w;
799 list_for_each_entry(w, list, power_list)
800 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
801 list_add_tail(&new_widget->power_list, &w->power_list);
805 list_add_tail(&new_widget->power_list, list);
808 static void dapm_seq_check_event(struct snd_soc_dapm_context *dapm,
809 struct snd_soc_dapm_widget *w, int event)
811 struct snd_soc_card *card = dapm->card;
816 case SND_SOC_DAPM_PRE_PMU:
820 case SND_SOC_DAPM_POST_PMU:
821 ev_name = "POST_PMU";
824 case SND_SOC_DAPM_PRE_PMD:
828 case SND_SOC_DAPM_POST_PMD:
829 ev_name = "POST_PMD";
837 if (w->power != power)
840 if (w->event && (w->event_flags & event)) {
841 pop_dbg(dapm->dev, card->pop_time, "pop test : %s %s\n",
843 trace_snd_soc_dapm_widget_event_start(w, event);
844 ret = w->event(w, NULL, event);
845 trace_snd_soc_dapm_widget_event_done(w, event);
847 pr_err("%s: %s event failed: %d\n",
848 ev_name, w->name, ret);
852 /* Apply the coalesced changes from a DAPM sequence */
853 static void dapm_seq_run_coalesced(struct snd_soc_dapm_context *dapm,
854 struct list_head *pending)
856 struct snd_soc_card *card = dapm->card;
857 struct snd_soc_dapm_widget *w;
859 unsigned int value = 0;
860 unsigned int mask = 0;
861 unsigned int cur_mask;
863 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
866 list_for_each_entry(w, pending, power_list) {
867 cur_mask = 1 << w->shift;
868 BUG_ON(reg != w->reg);
879 pop_dbg(dapm->dev, card->pop_time,
880 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
881 w->name, reg, value, mask);
883 /* Check for events */
884 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMU);
885 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMD);
889 pop_dbg(dapm->dev, card->pop_time,
890 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
891 value, mask, reg, card->pop_time);
892 pop_wait(card->pop_time);
893 snd_soc_update_bits(dapm->codec, reg, mask, value);
896 list_for_each_entry(w, pending, power_list) {
897 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMU);
898 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMD);
902 /* Apply a DAPM power sequence.
904 * We walk over a pre-sorted list of widgets to apply power to. In
905 * order to minimise the number of writes to the device required
906 * multiple widgets will be updated in a single write where possible.
907 * Currently anything that requires more than a single write is not
910 static void dapm_seq_run(struct snd_soc_dapm_context *dapm,
911 struct list_head *list, int event, bool power_up)
913 struct snd_soc_dapm_widget *w, *n;
917 int cur_reg = SND_SOC_NOPM;
918 struct snd_soc_dapm_context *cur_dapm = NULL;
925 sort = dapm_down_seq;
927 list_for_each_entry_safe(w, n, list, power_list) {
930 /* Do we need to apply any queued changes? */
931 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
932 w->dapm != cur_dapm || w->subseq != cur_subseq) {
933 if (!list_empty(&pending))
934 dapm_seq_run_coalesced(cur_dapm, &pending);
936 if (cur_dapm && cur_dapm->seq_notifier) {
937 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
938 if (sort[i] == cur_sort)
939 cur_dapm->seq_notifier(cur_dapm,
944 INIT_LIST_HEAD(&pending);
947 cur_reg = SND_SOC_NOPM;
952 case snd_soc_dapm_pre:
954 list_for_each_entry_safe_continue(w, n, list,
957 if (event == SND_SOC_DAPM_STREAM_START)
959 NULL, SND_SOC_DAPM_PRE_PMU);
960 else if (event == SND_SOC_DAPM_STREAM_STOP)
962 NULL, SND_SOC_DAPM_PRE_PMD);
965 case snd_soc_dapm_post:
967 list_for_each_entry_safe_continue(w, n, list,
970 if (event == SND_SOC_DAPM_STREAM_START)
972 NULL, SND_SOC_DAPM_POST_PMU);
973 else if (event == SND_SOC_DAPM_STREAM_STOP)
975 NULL, SND_SOC_DAPM_POST_PMD);
979 /* Queue it up for application */
980 cur_sort = sort[w->id];
981 cur_subseq = w->subseq;
984 list_move(&w->power_list, &pending);
989 dev_err(w->dapm->dev,
990 "Failed to apply widget power: %d\n", ret);
993 if (!list_empty(&pending))
994 dapm_seq_run_coalesced(cur_dapm, &pending);
996 if (cur_dapm && cur_dapm->seq_notifier) {
997 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
998 if (sort[i] == cur_sort)
999 cur_dapm->seq_notifier(cur_dapm,
1004 static void dapm_widget_update(struct snd_soc_dapm_context *dapm)
1006 struct snd_soc_dapm_update *update = dapm->update;
1007 struct snd_soc_dapm_widget *w;
1016 (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
1017 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
1019 pr_err("%s DAPM pre-event failed: %d\n",
1023 ret = snd_soc_update_bits(w->codec, update->reg, update->mask,
1026 pr_err("%s DAPM update failed: %d\n", w->name, ret);
1029 (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1030 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1032 pr_err("%s DAPM post-event failed: %d\n",
1037 /* Async callback run prior to DAPM sequences - brings to _PREPARE if
1038 * they're changing state.
1040 static void dapm_pre_sequence_async(void *data, async_cookie_t cookie)
1042 struct snd_soc_dapm_context *d = data;
1045 /* If we're off and we're not supposed to be go into STANDBY */
1046 if (d->bias_level == SND_SOC_BIAS_OFF &&
1047 d->target_bias_level != SND_SOC_BIAS_OFF) {
1048 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1051 "Failed to turn on bias: %d\n", ret);
1054 /* Prepare for a STADDBY->ON or ON->STANDBY transition */
1055 if (d->bias_level != d->target_bias_level) {
1056 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);
1059 "Failed to prepare bias: %d\n", ret);
1063 /* Async callback run prior to DAPM sequences - brings to their final
1066 static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
1068 struct snd_soc_dapm_context *d = data;
1071 /* If we just powered the last thing off drop to standby bias */
1072 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1073 (d->target_bias_level == SND_SOC_BIAS_STANDBY ||
1074 d->target_bias_level == SND_SOC_BIAS_OFF)) {
1075 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1077 dev_err(d->dev, "Failed to apply standby bias: %d\n",
1081 /* If we're in standby and can support bias off then do that */
1082 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1083 d->target_bias_level == SND_SOC_BIAS_OFF) {
1084 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);
1086 dev_err(d->dev, "Failed to turn off bias: %d\n", ret);
1089 /* If we just powered up then move to active bias */
1090 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1091 d->target_bias_level == SND_SOC_BIAS_ON) {
1092 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);
1094 dev_err(d->dev, "Failed to apply active bias: %d\n",
1100 * Scan each dapm widget for complete audio path.
1101 * A complete path is a route that has valid endpoints i.e.:-
1103 * o DAC to output pin.
1104 * o Input Pin to ADC.
1105 * o Input pin to Output pin (bypass, sidetone)
1106 * o DAC to ADC (loopback).
1108 static int dapm_power_widgets(struct snd_soc_dapm_context *dapm, int event)
1110 struct snd_soc_card *card = dapm->card;
1111 struct snd_soc_dapm_widget *w;
1112 struct snd_soc_dapm_context *d;
1114 LIST_HEAD(down_list);
1115 LIST_HEAD(async_domain);
1116 enum snd_soc_bias_level bias;
1119 trace_snd_soc_dapm_start(card);
1121 list_for_each_entry(d, &card->dapm_list, list) {
1122 if (d->n_widgets || d->codec == NULL) {
1123 if (d->idle_bias_off)
1124 d->target_bias_level = SND_SOC_BIAS_OFF;
1126 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1130 /* Check which widgets we need to power and store them in
1131 * lists indicating if they should be powered up or down.
1133 list_for_each_entry(w, &card->widgets, list) {
1135 case snd_soc_dapm_pre:
1136 dapm_seq_insert(w, &down_list, false);
1138 case snd_soc_dapm_post:
1139 dapm_seq_insert(w, &up_list, true);
1143 if (!w->power_check)
1147 power = w->power_check(w);
1151 w->dapm->target_bias_level = SND_SOC_BIAS_ON;
1153 if (w->power == power)
1156 trace_snd_soc_dapm_widget_power(w, power);
1159 dapm_seq_insert(w, &up_list, true);
1161 dapm_seq_insert(w, &down_list, false);
1168 /* If there are no DAPM widgets then try to figure out power from the
1171 if (!dapm->n_widgets) {
1173 case SND_SOC_DAPM_STREAM_START:
1174 case SND_SOC_DAPM_STREAM_RESUME:
1175 dapm->target_bias_level = SND_SOC_BIAS_ON;
1177 case SND_SOC_DAPM_STREAM_STOP:
1178 if (dapm->codec->active)
1179 dapm->target_bias_level = SND_SOC_BIAS_ON;
1181 dapm->target_bias_level = SND_SOC_BIAS_STANDBY;
1183 case SND_SOC_DAPM_STREAM_SUSPEND:
1184 dapm->target_bias_level = SND_SOC_BIAS_STANDBY;
1186 case SND_SOC_DAPM_STREAM_NOP:
1187 dapm->target_bias_level = dapm->bias_level;
1194 /* Force all contexts in the card to the same bias state */
1195 bias = SND_SOC_BIAS_OFF;
1196 list_for_each_entry(d, &card->dapm_list, list)
1197 if (d->target_bias_level > bias)
1198 bias = d->target_bias_level;
1199 list_for_each_entry(d, &card->dapm_list, list)
1200 d->target_bias_level = bias;
1203 /* Run all the bias changes in parallel */
1204 list_for_each_entry(d, &dapm->card->dapm_list, list)
1205 async_schedule_domain(dapm_pre_sequence_async, d,
1207 async_synchronize_full_domain(&async_domain);
1209 /* Power down widgets first; try to avoid amplifying pops. */
1210 dapm_seq_run(dapm, &down_list, event, false);
1212 dapm_widget_update(dapm);
1215 dapm_seq_run(dapm, &up_list, event, true);
1217 /* Run all the bias changes in parallel */
1218 list_for_each_entry(d, &dapm->card->dapm_list, list)
1219 async_schedule_domain(dapm_post_sequence_async, d,
1221 async_synchronize_full_domain(&async_domain);
1223 pop_dbg(dapm->dev, card->pop_time,
1224 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
1225 pop_wait(card->pop_time);
1227 trace_snd_soc_dapm_done(card);
1232 #ifdef CONFIG_DEBUG_FS
1233 static int dapm_widget_power_open_file(struct inode *inode, struct file *file)
1235 file->private_data = inode->i_private;
1239 static ssize_t dapm_widget_power_read_file(struct file *file,
1240 char __user *user_buf,
1241 size_t count, loff_t *ppos)
1243 struct snd_soc_dapm_widget *w = file->private_data;
1247 struct snd_soc_dapm_path *p = NULL;
1249 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1253 in = is_connected_input_ep(w);
1254 dapm_clear_walk(w->dapm);
1255 out = is_connected_output_ep(w);
1256 dapm_clear_walk(w->dapm);
1258 ret = snprintf(buf, PAGE_SIZE, "%s: %s in %d out %d",
1259 w->name, w->power ? "On" : "Off", in, out);
1262 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1263 " - R%d(0x%x) bit %d",
1264 w->reg, w->reg, w->shift);
1266 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1269 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1271 w->active ? "active" : "inactive");
1273 list_for_each_entry(p, &w->sources, list_sink) {
1274 if (p->connected && !p->connected(w, p->sink))
1278 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1279 " in \"%s\" \"%s\"\n",
1280 p->name ? p->name : "static",
1283 list_for_each_entry(p, &w->sinks, list_source) {
1284 if (p->connected && !p->connected(w, p->sink))
1288 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1289 " out \"%s\" \"%s\"\n",
1290 p->name ? p->name : "static",
1294 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1300 static const struct file_operations dapm_widget_power_fops = {
1301 .open = dapm_widget_power_open_file,
1302 .read = dapm_widget_power_read_file,
1303 .llseek = default_llseek,
1306 static int dapm_bias_open_file(struct inode *inode, struct file *file)
1308 file->private_data = inode->i_private;
1312 static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
1313 size_t count, loff_t *ppos)
1315 struct snd_soc_dapm_context *dapm = file->private_data;
1318 switch (dapm->bias_level) {
1319 case SND_SOC_BIAS_ON:
1322 case SND_SOC_BIAS_PREPARE:
1323 level = "Prepare\n";
1325 case SND_SOC_BIAS_STANDBY:
1326 level = "Standby\n";
1328 case SND_SOC_BIAS_OFF:
1333 level = "Unknown\n";
1337 return simple_read_from_buffer(user_buf, count, ppos, level,
1341 static const struct file_operations dapm_bias_fops = {
1342 .open = dapm_bias_open_file,
1343 .read = dapm_bias_read_file,
1344 .llseek = default_llseek,
1347 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1348 struct dentry *parent)
1352 dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
1354 if (!dapm->debugfs_dapm) {
1356 "Failed to create DAPM debugfs directory\n");
1360 d = debugfs_create_file("bias_level", 0444,
1361 dapm->debugfs_dapm, dapm,
1365 "ASoC: Failed to create bias level debugfs file\n");
1368 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1370 struct snd_soc_dapm_context *dapm = w->dapm;
1373 if (!dapm->debugfs_dapm || !w->name)
1376 d = debugfs_create_file(w->name, 0444,
1377 dapm->debugfs_dapm, w,
1378 &dapm_widget_power_fops);
1380 dev_warn(w->dapm->dev,
1381 "ASoC: Failed to create %s debugfs file\n",
1385 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1387 debugfs_remove_recursive(dapm->debugfs_dapm);
1391 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1392 struct dentry *parent)
1396 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1400 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1406 /* test and update the power status of a mux widget */
1407 static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1408 struct snd_kcontrol *kcontrol, int change,
1409 int mux, struct soc_enum *e)
1411 struct snd_soc_dapm_path *path;
1414 if (widget->id != snd_soc_dapm_mux &&
1415 widget->id != snd_soc_dapm_virt_mux &&
1416 widget->id != snd_soc_dapm_value_mux)
1422 /* find dapm widget path assoc with kcontrol */
1423 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1424 if (path->kcontrol != kcontrol)
1427 if (!path->name || !e->texts[mux])
1431 /* we now need to match the string in the enum to the path */
1432 if (!(strcmp(path->name, e->texts[mux])))
1433 path->connect = 1; /* new connection */
1435 path->connect = 0; /* old connection must be powered down */
1439 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1444 /* test and update the power status of a mixer or switch widget */
1445 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1446 struct snd_kcontrol *kcontrol, int connect)
1448 struct snd_soc_dapm_path *path;
1451 if (widget->id != snd_soc_dapm_mixer &&
1452 widget->id != snd_soc_dapm_mixer_named_ctl &&
1453 widget->id != snd_soc_dapm_switch)
1456 /* find dapm widget path assoc with kcontrol */
1457 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1458 if (path->kcontrol != kcontrol)
1461 /* found, now check type */
1463 path->connect = connect;
1468 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1473 /* show dapm widget status in sys fs */
1474 static ssize_t dapm_widget_show(struct device *dev,
1475 struct device_attribute *attr, char *buf)
1477 struct snd_soc_pcm_runtime *rtd =
1478 container_of(dev, struct snd_soc_pcm_runtime, dev);
1479 struct snd_soc_codec *codec =rtd->codec;
1480 struct snd_soc_dapm_widget *w;
1482 char *state = "not set";
1484 list_for_each_entry(w, &codec->card->widgets, list) {
1485 if (w->dapm != &codec->dapm)
1488 /* only display widgets that burnm power */
1490 case snd_soc_dapm_hp:
1491 case snd_soc_dapm_mic:
1492 case snd_soc_dapm_spk:
1493 case snd_soc_dapm_line:
1494 case snd_soc_dapm_micbias:
1495 case snd_soc_dapm_dac:
1496 case snd_soc_dapm_adc:
1497 case snd_soc_dapm_pga:
1498 case snd_soc_dapm_out_drv:
1499 case snd_soc_dapm_mixer:
1500 case snd_soc_dapm_mixer_named_ctl:
1501 case snd_soc_dapm_supply:
1503 count += sprintf(buf + count, "%s: %s\n",
1504 w->name, w->power ? "On":"Off");
1511 switch (codec->dapm.bias_level) {
1512 case SND_SOC_BIAS_ON:
1515 case SND_SOC_BIAS_PREPARE:
1518 case SND_SOC_BIAS_STANDBY:
1521 case SND_SOC_BIAS_OFF:
1525 count += sprintf(buf + count, "PM State: %s\n", state);
1530 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
1532 int snd_soc_dapm_sys_add(struct device *dev)
1534 return device_create_file(dev, &dev_attr_dapm_widget);
1537 static void snd_soc_dapm_sys_remove(struct device *dev)
1539 device_remove_file(dev, &dev_attr_dapm_widget);
1542 /* free all dapm widgets and resources */
1543 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
1545 struct snd_soc_dapm_widget *w, *next_w;
1546 struct snd_soc_dapm_path *p, *next_p;
1548 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
1549 if (w->dapm != dapm)
1553 * remove source and sink paths associated to this widget.
1554 * While removing the path, remove reference to it from both
1555 * source and sink widgets so that path is removed only once.
1557 list_for_each_entry_safe(p, next_p, &w->sources, list_sink) {
1558 list_del(&p->list_sink);
1559 list_del(&p->list_source);
1561 kfree(p->long_name);
1564 list_for_each_entry_safe(p, next_p, &w->sinks, list_source) {
1565 list_del(&p->list_sink);
1566 list_del(&p->list_source);
1568 kfree(p->long_name);
1571 kfree(w->kcontrols);
1577 static struct snd_soc_dapm_widget *dapm_find_widget(
1578 struct snd_soc_dapm_context *dapm, const char *pin,
1579 bool search_other_contexts)
1581 struct snd_soc_dapm_widget *w;
1582 struct snd_soc_dapm_widget *fallback = NULL;
1584 list_for_each_entry(w, &dapm->card->widgets, list) {
1585 if (!strcmp(w->name, pin)) {
1586 if (w->dapm == dapm)
1593 if (search_other_contexts)
1599 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
1600 const char *pin, int status)
1602 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
1605 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
1609 w->connected = status;
1617 * snd_soc_dapm_sync - scan and power dapm paths
1618 * @dapm: DAPM context
1620 * Walks all dapm audio paths and powers widgets according to their
1621 * stream or path usage.
1623 * Returns 0 for success.
1625 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
1627 return dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
1629 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
1631 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
1632 const struct snd_soc_dapm_route *route)
1634 struct snd_soc_dapm_path *path;
1635 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
1636 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
1638 const char *control = route->control;
1640 char prefixed_sink[80];
1641 char prefixed_source[80];
1644 if (dapm->codec && dapm->codec->name_prefix) {
1645 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
1646 dapm->codec->name_prefix, route->sink);
1647 sink = prefixed_sink;
1648 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
1649 dapm->codec->name_prefix, route->source);
1650 source = prefixed_source;
1653 source = route->source;
1657 * find src and dest widgets over all widgets but favor a widget from
1658 * current DAPM context
1660 list_for_each_entry(w, &dapm->card->widgets, list) {
1661 if (!wsink && !(strcmp(w->name, sink))) {
1663 if (w->dapm == dapm)
1667 if (!wsource && !(strcmp(w->name, source))) {
1669 if (w->dapm == dapm)
1673 /* use widget from another DAPM context if not found from this */
1679 if (wsource == NULL || wsink == NULL)
1682 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
1686 path->source = wsource;
1688 path->connected = route->connected;
1689 INIT_LIST_HEAD(&path->list);
1690 INIT_LIST_HEAD(&path->list_source);
1691 INIT_LIST_HEAD(&path->list_sink);
1693 /* check for external widgets */
1694 if (wsink->id == snd_soc_dapm_input) {
1695 if (wsource->id == snd_soc_dapm_micbias ||
1696 wsource->id == snd_soc_dapm_mic ||
1697 wsource->id == snd_soc_dapm_line ||
1698 wsource->id == snd_soc_dapm_output)
1701 if (wsource->id == snd_soc_dapm_output) {
1702 if (wsink->id == snd_soc_dapm_spk ||
1703 wsink->id == snd_soc_dapm_hp ||
1704 wsink->id == snd_soc_dapm_line ||
1705 wsink->id == snd_soc_dapm_input)
1709 /* connect static paths */
1710 if (control == NULL) {
1711 list_add(&path->list, &dapm->card->paths);
1712 list_add(&path->list_sink, &wsink->sources);
1713 list_add(&path->list_source, &wsource->sinks);
1718 /* connect dynamic paths */
1719 switch (wsink->id) {
1720 case snd_soc_dapm_adc:
1721 case snd_soc_dapm_dac:
1722 case snd_soc_dapm_pga:
1723 case snd_soc_dapm_out_drv:
1724 case snd_soc_dapm_input:
1725 case snd_soc_dapm_output:
1726 case snd_soc_dapm_micbias:
1727 case snd_soc_dapm_vmid:
1728 case snd_soc_dapm_pre:
1729 case snd_soc_dapm_post:
1730 case snd_soc_dapm_supply:
1731 case snd_soc_dapm_aif_in:
1732 case snd_soc_dapm_aif_out:
1733 list_add(&path->list, &dapm->card->paths);
1734 list_add(&path->list_sink, &wsink->sources);
1735 list_add(&path->list_source, &wsource->sinks);
1738 case snd_soc_dapm_mux:
1739 case snd_soc_dapm_virt_mux:
1740 case snd_soc_dapm_value_mux:
1741 ret = dapm_connect_mux(dapm, wsource, wsink, path, control,
1742 &wsink->kcontrol_news[0]);
1746 case snd_soc_dapm_switch:
1747 case snd_soc_dapm_mixer:
1748 case snd_soc_dapm_mixer_named_ctl:
1749 ret = dapm_connect_mixer(dapm, wsource, wsink, path, control);
1753 case snd_soc_dapm_hp:
1754 case snd_soc_dapm_mic:
1755 case snd_soc_dapm_line:
1756 case snd_soc_dapm_spk:
1757 list_add(&path->list, &dapm->card->paths);
1758 list_add(&path->list_sink, &wsink->sources);
1759 list_add(&path->list_source, &wsource->sinks);
1766 dev_warn(dapm->dev, "asoc: no dapm match for %s --> %s --> %s\n",
1767 source, control, sink);
1773 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1774 * @dapm: DAPM context
1775 * @route: audio routes
1776 * @num: number of routes
1778 * Connects 2 dapm widgets together via a named audio path. The sink is
1779 * the widget receiving the audio signal, whilst the source is the sender
1780 * of the audio signal.
1782 * Returns 0 for success else error. On error all resources can be freed
1783 * with a call to snd_soc_card_free().
1785 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
1786 const struct snd_soc_dapm_route *route, int num)
1790 for (i = 0; i < num; i++) {
1791 ret = snd_soc_dapm_add_route(dapm, route);
1793 dev_err(dapm->dev, "Failed to add route %s->%s\n",
1794 route->source, route->sink);
1802 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
1805 * snd_soc_dapm_new_widgets - add new dapm widgets
1806 * @dapm: DAPM context
1808 * Checks the codec for any new dapm widgets and creates them if found.
1810 * Returns 0 for success.
1812 int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context *dapm)
1814 struct snd_soc_dapm_widget *w;
1817 list_for_each_entry(w, &dapm->card->widgets, list)
1822 if (w->num_kcontrols) {
1823 w->kcontrols = kzalloc(w->num_kcontrols *
1824 sizeof(struct snd_kcontrol *),
1831 case snd_soc_dapm_switch:
1832 case snd_soc_dapm_mixer:
1833 case snd_soc_dapm_mixer_named_ctl:
1834 w->power_check = dapm_generic_check_power;
1835 dapm_new_mixer(dapm, w);
1837 case snd_soc_dapm_mux:
1838 case snd_soc_dapm_virt_mux:
1839 case snd_soc_dapm_value_mux:
1840 w->power_check = dapm_generic_check_power;
1841 dapm_new_mux(dapm, w);
1843 case snd_soc_dapm_adc:
1844 case snd_soc_dapm_aif_out:
1845 w->power_check = dapm_adc_check_power;
1847 case snd_soc_dapm_dac:
1848 case snd_soc_dapm_aif_in:
1849 w->power_check = dapm_dac_check_power;
1851 case snd_soc_dapm_pga:
1852 case snd_soc_dapm_out_drv:
1853 w->power_check = dapm_generic_check_power;
1854 dapm_new_pga(dapm, w);
1856 case snd_soc_dapm_input:
1857 case snd_soc_dapm_output:
1858 case snd_soc_dapm_micbias:
1859 case snd_soc_dapm_spk:
1860 case snd_soc_dapm_hp:
1861 case snd_soc_dapm_mic:
1862 case snd_soc_dapm_line:
1863 w->power_check = dapm_generic_check_power;
1865 case snd_soc_dapm_supply:
1866 w->power_check = dapm_supply_check_power;
1867 case snd_soc_dapm_vmid:
1868 case snd_soc_dapm_pre:
1869 case snd_soc_dapm_post:
1873 /* Read the initial power state from the device */
1875 val = snd_soc_read(w->codec, w->reg);
1876 val &= 1 << w->shift;
1886 dapm_debugfs_add_widget(w);
1889 dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
1892 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
1895 * snd_soc_dapm_get_volsw - dapm mixer get callback
1896 * @kcontrol: mixer control
1897 * @ucontrol: control element information
1899 * Callback to get the value of a dapm mixer control.
1901 * Returns 0 for success.
1903 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
1904 struct snd_ctl_elem_value *ucontrol)
1906 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
1907 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
1908 struct soc_mixer_control *mc =
1909 (struct soc_mixer_control *)kcontrol->private_value;
1910 unsigned int reg = mc->reg;
1911 unsigned int shift = mc->shift;
1912 unsigned int rshift = mc->rshift;
1914 unsigned int invert = mc->invert;
1915 unsigned int mask = (1 << fls(max)) - 1;
1917 ucontrol->value.integer.value[0] =
1918 (snd_soc_read(widget->codec, reg) >> shift) & mask;
1919 if (shift != rshift)
1920 ucontrol->value.integer.value[1] =
1921 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
1923 ucontrol->value.integer.value[0] =
1924 max - ucontrol->value.integer.value[0];
1925 if (shift != rshift)
1926 ucontrol->value.integer.value[1] =
1927 max - ucontrol->value.integer.value[1];
1932 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
1935 * snd_soc_dapm_put_volsw - dapm mixer set callback
1936 * @kcontrol: mixer control
1937 * @ucontrol: control element information
1939 * Callback to set the value of a dapm mixer control.
1941 * Returns 0 for success.
1943 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
1944 struct snd_ctl_elem_value *ucontrol)
1946 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
1947 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
1948 struct snd_soc_codec *codec = widget->codec;
1949 struct soc_mixer_control *mc =
1950 (struct soc_mixer_control *)kcontrol->private_value;
1951 unsigned int reg = mc->reg;
1952 unsigned int shift = mc->shift;
1954 unsigned int mask = (1 << fls(max)) - 1;
1955 unsigned int invert = mc->invert;
1957 int connect, change;
1958 struct snd_soc_dapm_update update;
1961 val = (ucontrol->value.integer.value[0] & mask);
1965 mask = mask << shift;
1969 /* new connection */
1970 connect = invert ? 0 : 1;
1972 /* old connection must be powered down */
1973 connect = invert ? 1 : 0;
1975 mutex_lock(&codec->mutex);
1977 change = snd_soc_test_bits(widget->codec, reg, mask, val);
1979 for (wi = 0; wi < wlist->num_widgets; wi++) {
1980 widget = wlist->widgets[wi];
1982 widget->value = val;
1984 update.kcontrol = kcontrol;
1985 update.widget = widget;
1989 widget->dapm->update = &update;
1991 dapm_mixer_update_power(widget, kcontrol, connect);
1993 widget->dapm->update = NULL;
1997 mutex_unlock(&codec->mutex);
2000 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
2003 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
2004 * @kcontrol: mixer control
2005 * @ucontrol: control element information
2007 * Callback to get the value of a dapm enumerated double mixer control.
2009 * Returns 0 for success.
2011 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
2012 struct snd_ctl_elem_value *ucontrol)
2014 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2015 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2016 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2017 unsigned int val, bitmask;
2019 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2021 val = snd_soc_read(widget->codec, e->reg);
2022 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
2023 if (e->shift_l != e->shift_r)
2024 ucontrol->value.enumerated.item[1] =
2025 (val >> e->shift_r) & (bitmask - 1);
2029 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
2032 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
2033 * @kcontrol: mixer control
2034 * @ucontrol: control element information
2036 * Callback to set the value of a dapm enumerated double mixer control.
2038 * Returns 0 for success.
2040 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
2041 struct snd_ctl_elem_value *ucontrol)
2043 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2044 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2045 struct snd_soc_codec *codec = widget->codec;
2046 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2047 unsigned int val, mux, change;
2048 unsigned int mask, bitmask;
2049 struct snd_soc_dapm_update update;
2052 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2054 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2056 mux = ucontrol->value.enumerated.item[0];
2057 val = mux << e->shift_l;
2058 mask = (bitmask - 1) << e->shift_l;
2059 if (e->shift_l != e->shift_r) {
2060 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2062 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2063 mask |= (bitmask - 1) << e->shift_r;
2066 mutex_lock(&codec->mutex);
2068 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2070 for (wi = 0; wi < wlist->num_widgets; wi++) {
2071 widget = wlist->widgets[wi];
2073 widget->value = val;
2075 update.kcontrol = kcontrol;
2076 update.widget = widget;
2077 update.reg = e->reg;
2080 widget->dapm->update = &update;
2082 dapm_mux_update_power(widget, kcontrol, change, mux, e);
2084 widget->dapm->update = NULL;
2088 mutex_unlock(&codec->mutex);
2091 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
2094 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
2095 * @kcontrol: mixer control
2096 * @ucontrol: control element information
2098 * Returns 0 for success.
2100 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
2101 struct snd_ctl_elem_value *ucontrol)
2103 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2104 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2106 ucontrol->value.enumerated.item[0] = widget->value;
2110 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt);
2113 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
2114 * @kcontrol: mixer control
2115 * @ucontrol: control element information
2117 * Returns 0 for success.
2119 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
2120 struct snd_ctl_elem_value *ucontrol)
2122 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2123 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2124 struct snd_soc_codec *codec = widget->codec;
2125 struct soc_enum *e =
2126 (struct soc_enum *)kcontrol->private_value;
2131 if (ucontrol->value.enumerated.item[0] >= e->max)
2134 mutex_lock(&codec->mutex);
2136 change = widget->value != ucontrol->value.enumerated.item[0];
2138 for (wi = 0; wi < wlist->num_widgets; wi++) {
2139 widget = wlist->widgets[wi];
2141 widget->value = ucontrol->value.enumerated.item[0];
2143 dapm_mux_update_power(widget, kcontrol, change,
2148 mutex_unlock(&codec->mutex);
2151 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt);
2154 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
2156 * @kcontrol: mixer control
2157 * @ucontrol: control element information
2159 * Callback to get the value of a dapm semi enumerated double mixer control.
2161 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2162 * used for handling bitfield coded enumeration for example.
2164 * Returns 0 for success.
2166 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
2167 struct snd_ctl_elem_value *ucontrol)
2169 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2170 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2171 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2172 unsigned int reg_val, val, mux;
2174 reg_val = snd_soc_read(widget->codec, e->reg);
2175 val = (reg_val >> e->shift_l) & e->mask;
2176 for (mux = 0; mux < e->max; mux++) {
2177 if (val == e->values[mux])
2180 ucontrol->value.enumerated.item[0] = mux;
2181 if (e->shift_l != e->shift_r) {
2182 val = (reg_val >> e->shift_r) & e->mask;
2183 for (mux = 0; mux < e->max; mux++) {
2184 if (val == e->values[mux])
2187 ucontrol->value.enumerated.item[1] = mux;
2192 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
2195 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
2197 * @kcontrol: mixer control
2198 * @ucontrol: control element information
2200 * Callback to set the value of a dapm semi enumerated double mixer control.
2202 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2203 * used for handling bitfield coded enumeration for example.
2205 * Returns 0 for success.
2207 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
2208 struct snd_ctl_elem_value *ucontrol)
2210 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2211 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2212 struct snd_soc_codec *codec = widget->codec;
2213 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2214 unsigned int val, mux, change;
2216 struct snd_soc_dapm_update update;
2219 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2221 mux = ucontrol->value.enumerated.item[0];
2222 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2223 mask = e->mask << e->shift_l;
2224 if (e->shift_l != e->shift_r) {
2225 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2227 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2228 mask |= e->mask << e->shift_r;
2231 mutex_lock(&codec->mutex);
2233 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2235 for (wi = 0; wi < wlist->num_widgets; wi++) {
2236 widget = wlist->widgets[wi];
2238 widget->value = val;
2240 update.kcontrol = kcontrol;
2241 update.widget = widget;
2242 update.reg = e->reg;
2245 widget->dapm->update = &update;
2247 dapm_mux_update_power(widget, kcontrol, change, mux, e);
2249 widget->dapm->update = NULL;
2253 mutex_unlock(&codec->mutex);
2256 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
2259 * snd_soc_dapm_info_pin_switch - Info for a pin switch
2261 * @kcontrol: mixer control
2262 * @uinfo: control element information
2264 * Callback to provide information about a pin switch control.
2266 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
2267 struct snd_ctl_elem_info *uinfo)
2269 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2271 uinfo->value.integer.min = 0;
2272 uinfo->value.integer.max = 1;
2276 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
2279 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
2281 * @kcontrol: mixer control
2284 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
2285 struct snd_ctl_elem_value *ucontrol)
2287 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2288 const char *pin = (const char *)kcontrol->private_value;
2290 mutex_lock(&codec->mutex);
2292 ucontrol->value.integer.value[0] =
2293 snd_soc_dapm_get_pin_status(&codec->dapm, pin);
2295 mutex_unlock(&codec->mutex);
2299 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
2302 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
2304 * @kcontrol: mixer control
2307 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
2308 struct snd_ctl_elem_value *ucontrol)
2310 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2311 const char *pin = (const char *)kcontrol->private_value;
2313 mutex_lock(&codec->mutex);
2315 if (ucontrol->value.integer.value[0])
2316 snd_soc_dapm_enable_pin(&codec->dapm, pin);
2318 snd_soc_dapm_disable_pin(&codec->dapm, pin);
2320 snd_soc_dapm_sync(&codec->dapm);
2322 mutex_unlock(&codec->mutex);
2326 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
2329 * snd_soc_dapm_new_control - create new dapm control
2330 * @dapm: DAPM context
2331 * @widget: widget template
2333 * Creates a new dapm control based upon the template.
2335 * Returns 0 for success else error.
2337 int snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
2338 const struct snd_soc_dapm_widget *widget)
2340 struct snd_soc_dapm_widget *w;
2343 if ((w = dapm_cnew_widget(widget)) == NULL)
2346 name_len = strlen(widget->name) + 1;
2347 if (dapm->codec && dapm->codec->name_prefix)
2348 name_len += 1 + strlen(dapm->codec->name_prefix);
2349 w->name = kmalloc(name_len, GFP_KERNEL);
2350 if (w->name == NULL) {
2354 if (dapm->codec && dapm->codec->name_prefix)
2355 snprintf(w->name, name_len, "%s %s",
2356 dapm->codec->name_prefix, widget->name);
2358 snprintf(w->name, name_len, "%s", widget->name);
2362 w->codec = dapm->codec;
2363 INIT_LIST_HEAD(&w->sources);
2364 INIT_LIST_HEAD(&w->sinks);
2365 INIT_LIST_HEAD(&w->list);
2366 list_add(&w->list, &dapm->card->widgets);
2368 /* machine layer set ups unconnected pins and insertions */
2372 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
2375 * snd_soc_dapm_new_controls - create new dapm controls
2376 * @dapm: DAPM context
2377 * @widget: widget array
2378 * @num: number of widgets
2380 * Creates new DAPM controls based upon the templates.
2382 * Returns 0 for success else error.
2384 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
2385 const struct snd_soc_dapm_widget *widget,
2390 for (i = 0; i < num; i++) {
2391 ret = snd_soc_dapm_new_control(dapm, widget);
2394 "ASoC: Failed to create DAPM control %s: %d\n",
2402 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
2404 static void soc_dapm_stream_event(struct snd_soc_dapm_context *dapm,
2405 const char *stream, int event)
2407 struct snd_soc_dapm_widget *w;
2409 list_for_each_entry(w, &dapm->card->widgets, list)
2411 if (!w->sname || w->dapm != dapm)
2413 dev_dbg(w->dapm->dev, "widget %s\n %s stream %s event %d\n",
2414 w->name, w->sname, stream, event);
2415 if (strstr(w->sname, stream)) {
2417 case SND_SOC_DAPM_STREAM_START:
2420 case SND_SOC_DAPM_STREAM_STOP:
2423 case SND_SOC_DAPM_STREAM_SUSPEND:
2424 case SND_SOC_DAPM_STREAM_RESUME:
2425 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
2426 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
2432 dapm_power_widgets(dapm, event);
2436 * snd_soc_dapm_stream_event - send a stream event to the dapm core
2437 * @rtd: PCM runtime data
2438 * @stream: stream name
2439 * @event: stream event
2441 * Sends a stream event to the dapm core. The core then makes any
2442 * necessary widget power changes.
2444 * Returns 0 for success else error.
2446 int snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd,
2447 const char *stream, int event)
2449 struct snd_soc_codec *codec = rtd->codec;
2454 mutex_lock(&codec->mutex);
2455 soc_dapm_stream_event(&codec->dapm, stream, event);
2456 mutex_unlock(&codec->mutex);
2461 * snd_soc_dapm_enable_pin - enable pin.
2462 * @dapm: DAPM context
2465 * Enables input/output pin and its parents or children widgets iff there is
2466 * a valid audio route and active audio stream.
2467 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2468 * do any widget power switching.
2470 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
2472 return snd_soc_dapm_set_pin(dapm, pin, 1);
2474 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
2477 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
2478 * @dapm: DAPM context
2481 * Enables input/output pin regardless of any other state. This is
2482 * intended for use with microphone bias supplies used in microphone
2485 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2486 * do any widget power switching.
2488 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
2491 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2494 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
2498 dev_dbg(w->dapm->dev, "dapm: force enable pin %s\n", pin);
2504 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
2507 * snd_soc_dapm_disable_pin - disable pin.
2508 * @dapm: DAPM context
2511 * Disables input/output pin and its parents or children widgets.
2512 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2513 * do any widget power switching.
2515 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
2518 return snd_soc_dapm_set_pin(dapm, pin, 0);
2520 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
2523 * snd_soc_dapm_nc_pin - permanently disable pin.
2524 * @dapm: DAPM context
2527 * Marks the specified pin as being not connected, disabling it along
2528 * any parent or child widgets. At present this is identical to
2529 * snd_soc_dapm_disable_pin() but in future it will be extended to do
2530 * additional things such as disabling controls which only affect
2531 * paths through the pin.
2533 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2534 * do any widget power switching.
2536 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
2538 return snd_soc_dapm_set_pin(dapm, pin, 0);
2540 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
2543 * snd_soc_dapm_get_pin_status - get audio pin status
2544 * @dapm: DAPM context
2545 * @pin: audio signal pin endpoint (or start point)
2547 * Get audio pin status - connected or disconnected.
2549 * Returns 1 for connected otherwise 0.
2551 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
2554 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2557 return w->connected;
2561 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
2564 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
2565 * @dapm: DAPM context
2566 * @pin: audio signal pin endpoint (or start point)
2568 * Mark the given endpoint or pin as ignoring suspend. When the
2569 * system is disabled a path between two endpoints flagged as ignoring
2570 * suspend will not be disabled. The path must already be enabled via
2571 * normal means at suspend time, it will not be turned on if it was not
2574 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
2577 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
2580 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
2584 w->ignore_suspend = 1;
2588 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
2591 * snd_soc_dapm_free - free dapm resources
2594 * Free all dapm widgets and resources.
2596 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
2598 snd_soc_dapm_sys_remove(dapm->dev);
2599 dapm_debugfs_cleanup(dapm);
2600 dapm_free_widgets(dapm);
2601 list_del(&dapm->list);
2603 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
2605 static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context *dapm)
2607 struct snd_soc_dapm_widget *w;
2608 LIST_HEAD(down_list);
2611 list_for_each_entry(w, &dapm->card->widgets, list) {
2612 if (w->dapm != dapm)
2615 dapm_seq_insert(w, &down_list, false);
2621 /* If there were no widgets to power down we're already in
2625 snd_soc_dapm_set_bias_level(dapm, SND_SOC_BIAS_PREPARE);
2626 dapm_seq_run(dapm, &down_list, 0, false);
2627 snd_soc_dapm_set_bias_level(dapm, SND_SOC_BIAS_STANDBY);
2632 * snd_soc_dapm_shutdown - callback for system shutdown
2634 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
2636 struct snd_soc_codec *codec;
2638 list_for_each_entry(codec, &card->codec_dev_list, list) {
2639 soc_dapm_shutdown_codec(&codec->dapm);
2640 snd_soc_dapm_set_bias_level(&codec->dapm, SND_SOC_BIAS_OFF);
2644 /* Module information */
2645 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2646 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
2647 MODULE_LICENSE("GPL");