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;
142 trace_snd_soc_bias_level_start(card, level);
144 if (card && card->set_bias_level)
145 ret = card->set_bias_level(card, dapm, level);
150 if (dapm->codec->driver->set_bias_level)
151 ret = dapm->codec->driver->set_bias_level(dapm->codec,
154 dapm->bias_level = level;
159 if (card && card->set_bias_level_post)
160 ret = card->set_bias_level_post(card, dapm, level);
162 trace_snd_soc_bias_level_done(card, level);
167 /* set up initial codec paths */
168 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
169 struct snd_soc_dapm_path *p, int i)
172 case snd_soc_dapm_switch:
173 case snd_soc_dapm_mixer:
174 case snd_soc_dapm_mixer_named_ctl: {
176 struct soc_mixer_control *mc = (struct soc_mixer_control *)
177 w->kcontrol_news[i].private_value;
178 unsigned int reg = mc->reg;
179 unsigned int shift = mc->shift;
181 unsigned int mask = (1 << fls(max)) - 1;
182 unsigned int invert = mc->invert;
184 val = snd_soc_read(w->codec, reg);
185 val = (val >> shift) & mask;
187 if ((invert && !val) || (!invert && val))
193 case snd_soc_dapm_mux: {
194 struct soc_enum *e = (struct soc_enum *)
195 w->kcontrol_news[i].private_value;
196 int val, item, bitmask;
198 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
200 val = snd_soc_read(w->codec, e->reg);
201 item = (val >> e->shift_l) & (bitmask - 1);
204 for (i = 0; i < e->max; i++) {
205 if (!(strcmp(p->name, e->texts[i])) && item == i)
210 case snd_soc_dapm_virt_mux: {
211 struct soc_enum *e = (struct soc_enum *)
212 w->kcontrol_news[i].private_value;
215 /* since a virtual mux has no backing registers to
216 * decide which path to connect, it will try to match
217 * with the first enumeration. This is to ensure
218 * that the default mux choice (the first) will be
219 * correctly powered up during initialization.
221 if (!strcmp(p->name, e->texts[0]))
225 case snd_soc_dapm_value_mux: {
226 struct soc_enum *e = (struct soc_enum *)
227 w->kcontrol_news[i].private_value;
230 val = snd_soc_read(w->codec, e->reg);
231 val = (val >> e->shift_l) & e->mask;
232 for (item = 0; item < e->max; item++) {
233 if (val == e->values[item])
238 for (i = 0; i < e->max; i++) {
239 if (!(strcmp(p->name, e->texts[i])) && item == i)
244 /* does not effect routing - always connected */
245 case snd_soc_dapm_pga:
246 case snd_soc_dapm_out_drv:
247 case snd_soc_dapm_output:
248 case snd_soc_dapm_adc:
249 case snd_soc_dapm_input:
250 case snd_soc_dapm_dac:
251 case snd_soc_dapm_micbias:
252 case snd_soc_dapm_vmid:
253 case snd_soc_dapm_supply:
254 case snd_soc_dapm_aif_in:
255 case snd_soc_dapm_aif_out:
258 /* does effect routing - dynamically connected */
259 case snd_soc_dapm_hp:
260 case snd_soc_dapm_mic:
261 case snd_soc_dapm_spk:
262 case snd_soc_dapm_line:
263 case snd_soc_dapm_pre:
264 case snd_soc_dapm_post:
270 /* connect mux widget to its interconnecting audio paths */
271 static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
272 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
273 struct snd_soc_dapm_path *path, const char *control_name,
274 const struct snd_kcontrol_new *kcontrol)
276 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
279 for (i = 0; i < e->max; i++) {
280 if (!(strcmp(control_name, e->texts[i]))) {
281 list_add(&path->list, &dapm->card->paths);
282 list_add(&path->list_sink, &dest->sources);
283 list_add(&path->list_source, &src->sinks);
284 path->name = (char*)e->texts[i];
285 dapm_set_path_status(dest, path, 0);
293 /* connect mixer widget to its interconnecting audio paths */
294 static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
295 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
296 struct snd_soc_dapm_path *path, const char *control_name)
300 /* search for mixer kcontrol */
301 for (i = 0; i < dest->num_kcontrols; i++) {
302 if (!strcmp(control_name, dest->kcontrol_news[i].name)) {
303 list_add(&path->list, &dapm->card->paths);
304 list_add(&path->list_sink, &dest->sources);
305 list_add(&path->list_source, &src->sinks);
306 path->name = dest->kcontrol_news[i].name;
307 dapm_set_path_status(dest, path, i);
314 static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm,
315 struct snd_soc_dapm_widget *kcontrolw,
316 const struct snd_kcontrol_new *kcontrol_new,
317 struct snd_kcontrol **kcontrol)
319 struct snd_soc_dapm_widget *w;
324 list_for_each_entry(w, &dapm->card->widgets, list) {
325 if (w == kcontrolw || w->dapm != kcontrolw->dapm)
327 for (i = 0; i < w->num_kcontrols; i++) {
328 if (&w->kcontrol_news[i] == kcontrol_new) {
330 *kcontrol = w->kcontrols[i];
339 /* create new dapm mixer control */
340 static int dapm_new_mixer(struct snd_soc_dapm_widget *w)
342 struct snd_soc_dapm_context *dapm = w->dapm;
344 size_t name_len, prefix_len;
345 struct snd_soc_dapm_path *path;
346 struct snd_card *card = dapm->card->snd_card;
348 struct snd_soc_dapm_widget_list *wlist;
352 prefix = dapm->codec->name_prefix;
357 prefix_len = strlen(prefix) + 1;
362 for (i = 0; i < w->num_kcontrols; i++) {
365 list_for_each_entry(path, &w->sources, list_sink) {
367 /* mixer/mux paths name must match control name */
368 if (path->name != (char *)w->kcontrol_news[i].name)
371 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
372 sizeof(struct snd_soc_dapm_widget *),
373 wlist = kzalloc(wlistsize, GFP_KERNEL);
376 "asoc: can't allocate widget list for %s\n",
380 wlist->num_widgets = 1;
381 wlist->widgets[0] = w;
383 /* add dapm control with long name.
384 * for dapm_mixer this is the concatenation of the
385 * mixer and kcontrol name.
386 * for dapm_mixer_named_ctl this is simply the
389 name_len = strlen(w->kcontrol_news[i].name) + 1;
390 if (w->id != snd_soc_dapm_mixer_named_ctl)
391 name_len += 1 + strlen(w->name);
393 path->long_name = kmalloc(name_len, GFP_KERNEL);
395 if (path->long_name == NULL) {
402 /* The control will get a prefix from
403 * the control creation process but
404 * we're also using the same prefix
405 * for widgets so cut the prefix off
406 * the front of the widget name.
408 snprintf(path->long_name, name_len, "%s %s",
409 w->name + prefix_len,
410 w->kcontrol_news[i].name);
412 case snd_soc_dapm_mixer_named_ctl:
413 snprintf(path->long_name, name_len, "%s",
414 w->kcontrol_news[i].name);
418 path->long_name[name_len - 1] = '\0';
420 path->kcontrol = snd_soc_cnew(&w->kcontrol_news[i],
421 wlist, path->long_name,
423 ret = snd_ctl_add(card, path->kcontrol);
426 "asoc: failed to add dapm kcontrol %s: %d\n",
427 path->long_name, ret);
429 kfree(path->long_name);
430 path->long_name = NULL;
433 w->kcontrols[i] = path->kcontrol;
439 /* create new dapm mux control */
440 static int dapm_new_mux(struct snd_soc_dapm_widget *w)
442 struct snd_soc_dapm_context *dapm = w->dapm;
443 struct snd_soc_dapm_path *path = NULL;
444 struct snd_kcontrol *kcontrol;
445 struct snd_card *card = dapm->card->snd_card;
449 struct snd_soc_dapm_widget_list *wlist;
450 int shared, wlistentries;
454 if (w->num_kcontrols != 1) {
456 "asoc: mux %s has incorrect number of controls\n",
461 shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[0],
464 wlist = kcontrol->private_data;
465 wlistentries = wlist->num_widgets + 1;
470 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
471 wlistentries * sizeof(struct snd_soc_dapm_widget *),
472 wlist = krealloc(wlist, wlistsize, GFP_KERNEL);
475 "asoc: can't allocate widget list for %s\n", w->name);
478 wlist->num_widgets = wlistentries;
479 wlist->widgets[wlistentries - 1] = w;
483 prefix = dapm->codec->name_prefix;
488 name = w->kcontrol_news[0].name;
493 prefix_len = strlen(prefix) + 1;
499 * The control will get a prefix from the control creation
500 * process but we're also using the same prefix for widgets so
501 * cut the prefix off the front of the widget name.
503 kcontrol = snd_soc_cnew(&w->kcontrol_news[0], wlist,
504 name + prefix_len, prefix);
505 ret = snd_ctl_add(card, kcontrol);
508 "asoc: failed to add kcontrol %s\n", w->name);
514 kcontrol->private_data = wlist;
516 w->kcontrols[0] = kcontrol;
518 list_for_each_entry(path, &w->sources, list_sink)
519 path->kcontrol = kcontrol;
524 /* create new dapm volume control */
525 static int dapm_new_pga(struct snd_soc_dapm_widget *w)
527 if (w->num_kcontrols)
528 dev_err(w->dapm->dev,
529 "asoc: PGA controls not supported: '%s'\n", w->name);
534 /* reset 'walked' bit for each dapm path */
535 static inline void dapm_clear_walk(struct snd_soc_dapm_context *dapm)
537 struct snd_soc_dapm_path *p;
539 list_for_each_entry(p, &dapm->card->paths, list)
543 /* We implement power down on suspend by checking the power state of
544 * the ALSA card - when we are suspending the ALSA state for the card
547 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
549 int level = snd_power_get_state(widget->dapm->card->snd_card);
552 case SNDRV_CTL_POWER_D3hot:
553 case SNDRV_CTL_POWER_D3cold:
554 if (widget->ignore_suspend)
555 dev_dbg(widget->dapm->dev, "%s ignoring suspend\n",
557 return widget->ignore_suspend;
564 * Recursively check for a completed path to an active or physically connected
565 * output widget. Returns number of complete paths.
567 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
569 struct snd_soc_dapm_path *path;
572 if (widget->id == snd_soc_dapm_supply)
575 switch (widget->id) {
576 case snd_soc_dapm_adc:
577 case snd_soc_dapm_aif_out:
579 return snd_soc_dapm_suspend_check(widget);
584 if (widget->connected) {
585 /* connected pin ? */
586 if (widget->id == snd_soc_dapm_output && !widget->ext)
587 return snd_soc_dapm_suspend_check(widget);
589 /* connected jack or spk ? */
590 if (widget->id == snd_soc_dapm_hp || widget->id == snd_soc_dapm_spk ||
591 (widget->id == snd_soc_dapm_line && !list_empty(&widget->sources)))
592 return snd_soc_dapm_suspend_check(widget);
595 list_for_each_entry(path, &widget->sinks, list_source) {
599 if (path->sink && path->connect) {
601 con += is_connected_output_ep(path->sink);
609 * Recursively check for a completed path to an active or physically connected
610 * input widget. Returns number of complete paths.
612 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
614 struct snd_soc_dapm_path *path;
617 if (widget->id == snd_soc_dapm_supply)
620 /* active stream ? */
621 switch (widget->id) {
622 case snd_soc_dapm_dac:
623 case snd_soc_dapm_aif_in:
625 return snd_soc_dapm_suspend_check(widget);
630 if (widget->connected) {
631 /* connected pin ? */
632 if (widget->id == snd_soc_dapm_input && !widget->ext)
633 return snd_soc_dapm_suspend_check(widget);
635 /* connected VMID/Bias for lower pops */
636 if (widget->id == snd_soc_dapm_vmid)
637 return snd_soc_dapm_suspend_check(widget);
639 /* connected jack ? */
640 if (widget->id == snd_soc_dapm_mic ||
641 (widget->id == snd_soc_dapm_line && !list_empty(&widget->sinks)))
642 return snd_soc_dapm_suspend_check(widget);
645 list_for_each_entry(path, &widget->sources, list_sink) {
649 if (path->source && path->connect) {
651 con += is_connected_input_ep(path->source);
659 * Handler for generic register modifier widget.
661 int dapm_reg_event(struct snd_soc_dapm_widget *w,
662 struct snd_kcontrol *kcontrol, int event)
666 if (SND_SOC_DAPM_EVENT_ON(event))
671 snd_soc_update_bits(w->codec, -(w->reg + 1),
672 w->mask << w->shift, val << w->shift);
676 EXPORT_SYMBOL_GPL(dapm_reg_event);
678 /* Generic check to see if a widget should be powered.
680 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
684 in = is_connected_input_ep(w);
685 dapm_clear_walk(w->dapm);
686 out = is_connected_output_ep(w);
687 dapm_clear_walk(w->dapm);
688 return out != 0 && in != 0;
691 /* Check to see if an ADC has power */
692 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
697 in = is_connected_input_ep(w);
698 dapm_clear_walk(w->dapm);
701 return dapm_generic_check_power(w);
705 /* Check to see if a DAC has power */
706 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
711 out = is_connected_output_ep(w);
712 dapm_clear_walk(w->dapm);
715 return dapm_generic_check_power(w);
719 /* Check to see if a power supply is needed */
720 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
722 struct snd_soc_dapm_path *path;
725 /* Check if one of our outputs is connected */
726 list_for_each_entry(path, &w->sinks, list_source) {
727 if (path->connected &&
728 !path->connected(path->source, path->sink))
734 if (path->sink->force) {
739 if (path->sink->power_check &&
740 path->sink->power_check(path->sink)) {
746 dapm_clear_walk(w->dapm);
751 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
752 struct snd_soc_dapm_widget *b,
760 sort = dapm_down_seq;
762 if (sort[a->id] != sort[b->id])
763 return sort[a->id] - sort[b->id];
764 if (a->subseq != b->subseq) {
766 return a->subseq - b->subseq;
768 return b->subseq - a->subseq;
770 if (a->reg != b->reg)
771 return a->reg - b->reg;
772 if (a->dapm != b->dapm)
773 return (unsigned long)a->dapm - (unsigned long)b->dapm;
778 /* Insert a widget in order into a DAPM power sequence. */
779 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
780 struct list_head *list,
783 struct snd_soc_dapm_widget *w;
785 list_for_each_entry(w, list, power_list)
786 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
787 list_add_tail(&new_widget->power_list, &w->power_list);
791 list_add_tail(&new_widget->power_list, list);
794 static void dapm_seq_check_event(struct snd_soc_dapm_context *dapm,
795 struct snd_soc_dapm_widget *w, int event)
797 struct snd_soc_card *card = dapm->card;
802 case SND_SOC_DAPM_PRE_PMU:
806 case SND_SOC_DAPM_POST_PMU:
807 ev_name = "POST_PMU";
810 case SND_SOC_DAPM_PRE_PMD:
814 case SND_SOC_DAPM_POST_PMD:
815 ev_name = "POST_PMD";
823 if (w->power != power)
826 if (w->event && (w->event_flags & event)) {
827 pop_dbg(dapm->dev, card->pop_time, "pop test : %s %s\n",
829 trace_snd_soc_dapm_widget_event_start(w, event);
830 ret = w->event(w, NULL, event);
831 trace_snd_soc_dapm_widget_event_done(w, event);
833 pr_err("%s: %s event failed: %d\n",
834 ev_name, w->name, ret);
838 /* Apply the coalesced changes from a DAPM sequence */
839 static void dapm_seq_run_coalesced(struct snd_soc_dapm_context *dapm,
840 struct list_head *pending)
842 struct snd_soc_card *card = dapm->card;
843 struct snd_soc_dapm_widget *w;
845 unsigned int value = 0;
846 unsigned int mask = 0;
847 unsigned int cur_mask;
849 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
852 list_for_each_entry(w, pending, power_list) {
853 cur_mask = 1 << w->shift;
854 BUG_ON(reg != w->reg);
865 pop_dbg(dapm->dev, card->pop_time,
866 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
867 w->name, reg, value, mask);
869 /* Check for events */
870 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMU);
871 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMD);
875 pop_dbg(dapm->dev, card->pop_time,
876 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
877 value, mask, reg, card->pop_time);
878 pop_wait(card->pop_time);
879 snd_soc_update_bits(dapm->codec, reg, mask, value);
882 list_for_each_entry(w, pending, power_list) {
883 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMU);
884 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMD);
888 /* Apply a DAPM power sequence.
890 * We walk over a pre-sorted list of widgets to apply power to. In
891 * order to minimise the number of writes to the device required
892 * multiple widgets will be updated in a single write where possible.
893 * Currently anything that requires more than a single write is not
896 static void dapm_seq_run(struct snd_soc_dapm_context *dapm,
897 struct list_head *list, int event, bool power_up)
899 struct snd_soc_dapm_widget *w, *n;
903 int cur_reg = SND_SOC_NOPM;
904 struct snd_soc_dapm_context *cur_dapm = NULL;
911 sort = dapm_down_seq;
913 list_for_each_entry_safe(w, n, list, power_list) {
916 /* Do we need to apply any queued changes? */
917 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
918 w->dapm != cur_dapm || w->subseq != cur_subseq) {
919 if (!list_empty(&pending))
920 dapm_seq_run_coalesced(cur_dapm, &pending);
922 if (cur_dapm && cur_dapm->seq_notifier) {
923 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
924 if (sort[i] == cur_sort)
925 cur_dapm->seq_notifier(cur_dapm,
930 INIT_LIST_HEAD(&pending);
933 cur_reg = SND_SOC_NOPM;
938 case snd_soc_dapm_pre:
940 list_for_each_entry_safe_continue(w, n, list,
943 if (event == SND_SOC_DAPM_STREAM_START)
945 NULL, SND_SOC_DAPM_PRE_PMU);
946 else if (event == SND_SOC_DAPM_STREAM_STOP)
948 NULL, SND_SOC_DAPM_PRE_PMD);
951 case snd_soc_dapm_post:
953 list_for_each_entry_safe_continue(w, n, list,
956 if (event == SND_SOC_DAPM_STREAM_START)
958 NULL, SND_SOC_DAPM_POST_PMU);
959 else if (event == SND_SOC_DAPM_STREAM_STOP)
961 NULL, SND_SOC_DAPM_POST_PMD);
965 /* Queue it up for application */
966 cur_sort = sort[w->id];
967 cur_subseq = w->subseq;
970 list_move(&w->power_list, &pending);
975 dev_err(w->dapm->dev,
976 "Failed to apply widget power: %d\n", ret);
979 if (!list_empty(&pending))
980 dapm_seq_run_coalesced(cur_dapm, &pending);
982 if (cur_dapm && cur_dapm->seq_notifier) {
983 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
984 if (sort[i] == cur_sort)
985 cur_dapm->seq_notifier(cur_dapm,
990 static void dapm_widget_update(struct snd_soc_dapm_context *dapm)
992 struct snd_soc_dapm_update *update = dapm->update;
993 struct snd_soc_dapm_widget *w;
1002 (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
1003 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
1005 pr_err("%s DAPM pre-event failed: %d\n",
1009 ret = snd_soc_update_bits(w->codec, update->reg, update->mask,
1012 pr_err("%s DAPM update failed: %d\n", w->name, ret);
1015 (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1016 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1018 pr_err("%s DAPM post-event failed: %d\n",
1023 /* Async callback run prior to DAPM sequences - brings to _PREPARE if
1024 * they're changing state.
1026 static void dapm_pre_sequence_async(void *data, async_cookie_t cookie)
1028 struct snd_soc_dapm_context *d = data;
1031 /* If we're off and we're not supposed to be go into STANDBY */
1032 if (d->bias_level == SND_SOC_BIAS_OFF &&
1033 d->target_bias_level != SND_SOC_BIAS_OFF) {
1034 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1037 "Failed to turn on bias: %d\n", ret);
1040 /* Prepare for a STADDBY->ON or ON->STANDBY transition */
1041 if (d->bias_level != d->target_bias_level) {
1042 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);
1045 "Failed to prepare bias: %d\n", ret);
1049 /* Async callback run prior to DAPM sequences - brings to their final
1052 static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
1054 struct snd_soc_dapm_context *d = data;
1057 /* If we just powered the last thing off drop to standby bias */
1058 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1059 (d->target_bias_level == SND_SOC_BIAS_STANDBY ||
1060 d->target_bias_level == SND_SOC_BIAS_OFF)) {
1061 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1063 dev_err(d->dev, "Failed to apply standby bias: %d\n",
1067 /* If we're in standby and can support bias off then do that */
1068 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1069 d->target_bias_level == SND_SOC_BIAS_OFF) {
1070 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);
1072 dev_err(d->dev, "Failed to turn off bias: %d\n", ret);
1075 /* If we just powered up then move to active bias */
1076 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1077 d->target_bias_level == SND_SOC_BIAS_ON) {
1078 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);
1080 dev_err(d->dev, "Failed to apply active bias: %d\n",
1086 * Scan each dapm widget for complete audio path.
1087 * A complete path is a route that has valid endpoints i.e.:-
1089 * o DAC to output pin.
1090 * o Input Pin to ADC.
1091 * o Input pin to Output pin (bypass, sidetone)
1092 * o DAC to ADC (loopback).
1094 static int dapm_power_widgets(struct snd_soc_dapm_context *dapm, int event)
1096 struct snd_soc_card *card = dapm->card;
1097 struct snd_soc_dapm_widget *w;
1098 struct snd_soc_dapm_context *d;
1100 LIST_HEAD(down_list);
1101 LIST_HEAD(async_domain);
1102 enum snd_soc_bias_level bias;
1105 trace_snd_soc_dapm_start(card);
1107 list_for_each_entry(d, &card->dapm_list, list) {
1108 if (d->n_widgets || d->codec == NULL) {
1109 if (d->idle_bias_off)
1110 d->target_bias_level = SND_SOC_BIAS_OFF;
1112 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1116 /* Check which widgets we need to power and store them in
1117 * lists indicating if they should be powered up or down.
1119 list_for_each_entry(w, &card->widgets, list) {
1121 case snd_soc_dapm_pre:
1122 dapm_seq_insert(w, &down_list, false);
1124 case snd_soc_dapm_post:
1125 dapm_seq_insert(w, &up_list, true);
1129 if (!w->power_check)
1133 power = w->power_check(w);
1140 /* Supplies and micbiases only bring
1141 * the context up to STANDBY as unless
1142 * something else is active and
1143 * passing audio they generally don't
1144 * require full power.
1147 case snd_soc_dapm_supply:
1148 case snd_soc_dapm_micbias:
1149 if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
1150 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1153 d->target_bias_level = SND_SOC_BIAS_ON;
1158 if (w->power == power)
1161 trace_snd_soc_dapm_widget_power(w, power);
1164 dapm_seq_insert(w, &up_list, true);
1166 dapm_seq_insert(w, &down_list, false);
1173 /* If there are no DAPM widgets then try to figure out power from the
1176 if (!dapm->n_widgets) {
1178 case SND_SOC_DAPM_STREAM_START:
1179 case SND_SOC_DAPM_STREAM_RESUME:
1180 dapm->target_bias_level = SND_SOC_BIAS_ON;
1182 case SND_SOC_DAPM_STREAM_STOP:
1183 if (dapm->codec->active)
1184 dapm->target_bias_level = SND_SOC_BIAS_ON;
1186 dapm->target_bias_level = SND_SOC_BIAS_STANDBY;
1188 case SND_SOC_DAPM_STREAM_SUSPEND:
1189 dapm->target_bias_level = SND_SOC_BIAS_STANDBY;
1191 case SND_SOC_DAPM_STREAM_NOP:
1192 dapm->target_bias_level = dapm->bias_level;
1199 /* Force all contexts in the card to the same bias state */
1200 bias = SND_SOC_BIAS_OFF;
1201 list_for_each_entry(d, &card->dapm_list, list)
1202 if (d->target_bias_level > bias)
1203 bias = d->target_bias_level;
1204 list_for_each_entry(d, &card->dapm_list, list)
1205 d->target_bias_level = bias;
1208 /* Run all the bias changes in parallel */
1209 list_for_each_entry(d, &dapm->card->dapm_list, list)
1210 async_schedule_domain(dapm_pre_sequence_async, d,
1212 async_synchronize_full_domain(&async_domain);
1214 /* Power down widgets first; try to avoid amplifying pops. */
1215 dapm_seq_run(dapm, &down_list, event, false);
1217 dapm_widget_update(dapm);
1220 dapm_seq_run(dapm, &up_list, event, true);
1222 /* Run all the bias changes in parallel */
1223 list_for_each_entry(d, &dapm->card->dapm_list, list)
1224 async_schedule_domain(dapm_post_sequence_async, d,
1226 async_synchronize_full_domain(&async_domain);
1228 pop_dbg(dapm->dev, card->pop_time,
1229 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
1230 pop_wait(card->pop_time);
1232 trace_snd_soc_dapm_done(card);
1237 #ifdef CONFIG_DEBUG_FS
1238 static int dapm_widget_power_open_file(struct inode *inode, struct file *file)
1240 file->private_data = inode->i_private;
1244 static ssize_t dapm_widget_power_read_file(struct file *file,
1245 char __user *user_buf,
1246 size_t count, loff_t *ppos)
1248 struct snd_soc_dapm_widget *w = file->private_data;
1252 struct snd_soc_dapm_path *p = NULL;
1254 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1258 in = is_connected_input_ep(w);
1259 dapm_clear_walk(w->dapm);
1260 out = is_connected_output_ep(w);
1261 dapm_clear_walk(w->dapm);
1263 ret = snprintf(buf, PAGE_SIZE, "%s: %s in %d out %d",
1264 w->name, w->power ? "On" : "Off", in, out);
1267 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1268 " - R%d(0x%x) bit %d",
1269 w->reg, w->reg, w->shift);
1271 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1274 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1276 w->active ? "active" : "inactive");
1278 list_for_each_entry(p, &w->sources, list_sink) {
1279 if (p->connected && !p->connected(w, p->sink))
1283 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1284 " in \"%s\" \"%s\"\n",
1285 p->name ? p->name : "static",
1288 list_for_each_entry(p, &w->sinks, list_source) {
1289 if (p->connected && !p->connected(w, p->sink))
1293 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1294 " out \"%s\" \"%s\"\n",
1295 p->name ? p->name : "static",
1299 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1305 static const struct file_operations dapm_widget_power_fops = {
1306 .open = dapm_widget_power_open_file,
1307 .read = dapm_widget_power_read_file,
1308 .llseek = default_llseek,
1311 static int dapm_bias_open_file(struct inode *inode, struct file *file)
1313 file->private_data = inode->i_private;
1317 static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
1318 size_t count, loff_t *ppos)
1320 struct snd_soc_dapm_context *dapm = file->private_data;
1323 switch (dapm->bias_level) {
1324 case SND_SOC_BIAS_ON:
1327 case SND_SOC_BIAS_PREPARE:
1328 level = "Prepare\n";
1330 case SND_SOC_BIAS_STANDBY:
1331 level = "Standby\n";
1333 case SND_SOC_BIAS_OFF:
1338 level = "Unknown\n";
1342 return simple_read_from_buffer(user_buf, count, ppos, level,
1346 static const struct file_operations dapm_bias_fops = {
1347 .open = dapm_bias_open_file,
1348 .read = dapm_bias_read_file,
1349 .llseek = default_llseek,
1352 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1353 struct dentry *parent)
1357 dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
1359 if (!dapm->debugfs_dapm) {
1361 "Failed to create DAPM debugfs directory\n");
1365 d = debugfs_create_file("bias_level", 0444,
1366 dapm->debugfs_dapm, dapm,
1370 "ASoC: Failed to create bias level debugfs file\n");
1373 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1375 struct snd_soc_dapm_context *dapm = w->dapm;
1378 if (!dapm->debugfs_dapm || !w->name)
1381 d = debugfs_create_file(w->name, 0444,
1382 dapm->debugfs_dapm, w,
1383 &dapm_widget_power_fops);
1385 dev_warn(w->dapm->dev,
1386 "ASoC: Failed to create %s debugfs file\n",
1390 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1392 debugfs_remove_recursive(dapm->debugfs_dapm);
1396 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1397 struct dentry *parent)
1401 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1405 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1411 /* test and update the power status of a mux widget */
1412 static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1413 struct snd_kcontrol *kcontrol, int change,
1414 int mux, struct soc_enum *e)
1416 struct snd_soc_dapm_path *path;
1419 if (widget->id != snd_soc_dapm_mux &&
1420 widget->id != snd_soc_dapm_virt_mux &&
1421 widget->id != snd_soc_dapm_value_mux)
1427 /* find dapm widget path assoc with kcontrol */
1428 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1429 if (path->kcontrol != kcontrol)
1432 if (!path->name || !e->texts[mux])
1436 /* we now need to match the string in the enum to the path */
1437 if (!(strcmp(path->name, e->texts[mux])))
1438 path->connect = 1; /* new connection */
1440 path->connect = 0; /* old connection must be powered down */
1444 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1449 /* test and update the power status of a mixer or switch widget */
1450 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1451 struct snd_kcontrol *kcontrol, int connect)
1453 struct snd_soc_dapm_path *path;
1456 if (widget->id != snd_soc_dapm_mixer &&
1457 widget->id != snd_soc_dapm_mixer_named_ctl &&
1458 widget->id != snd_soc_dapm_switch)
1461 /* find dapm widget path assoc with kcontrol */
1462 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1463 if (path->kcontrol != kcontrol)
1466 /* found, now check type */
1468 path->connect = connect;
1473 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1478 /* show dapm widget status in sys fs */
1479 static ssize_t dapm_widget_show(struct device *dev,
1480 struct device_attribute *attr, char *buf)
1482 struct snd_soc_pcm_runtime *rtd =
1483 container_of(dev, struct snd_soc_pcm_runtime, dev);
1484 struct snd_soc_codec *codec =rtd->codec;
1485 struct snd_soc_dapm_widget *w;
1487 char *state = "not set";
1489 list_for_each_entry(w, &codec->card->widgets, list) {
1490 if (w->dapm != &codec->dapm)
1493 /* only display widgets that burnm power */
1495 case snd_soc_dapm_hp:
1496 case snd_soc_dapm_mic:
1497 case snd_soc_dapm_spk:
1498 case snd_soc_dapm_line:
1499 case snd_soc_dapm_micbias:
1500 case snd_soc_dapm_dac:
1501 case snd_soc_dapm_adc:
1502 case snd_soc_dapm_pga:
1503 case snd_soc_dapm_out_drv:
1504 case snd_soc_dapm_mixer:
1505 case snd_soc_dapm_mixer_named_ctl:
1506 case snd_soc_dapm_supply:
1508 count += sprintf(buf + count, "%s: %s\n",
1509 w->name, w->power ? "On":"Off");
1516 switch (codec->dapm.bias_level) {
1517 case SND_SOC_BIAS_ON:
1520 case SND_SOC_BIAS_PREPARE:
1523 case SND_SOC_BIAS_STANDBY:
1526 case SND_SOC_BIAS_OFF:
1530 count += sprintf(buf + count, "PM State: %s\n", state);
1535 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
1537 int snd_soc_dapm_sys_add(struct device *dev)
1539 return device_create_file(dev, &dev_attr_dapm_widget);
1542 static void snd_soc_dapm_sys_remove(struct device *dev)
1544 device_remove_file(dev, &dev_attr_dapm_widget);
1547 /* free all dapm widgets and resources */
1548 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
1550 struct snd_soc_dapm_widget *w, *next_w;
1551 struct snd_soc_dapm_path *p, *next_p;
1553 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
1554 if (w->dapm != dapm)
1558 * remove source and sink paths associated to this widget.
1559 * While removing the path, remove reference to it from both
1560 * source and sink widgets so that path is removed only once.
1562 list_for_each_entry_safe(p, next_p, &w->sources, list_sink) {
1563 list_del(&p->list_sink);
1564 list_del(&p->list_source);
1566 kfree(p->long_name);
1569 list_for_each_entry_safe(p, next_p, &w->sinks, list_source) {
1570 list_del(&p->list_sink);
1571 list_del(&p->list_source);
1573 kfree(p->long_name);
1576 kfree(w->kcontrols);
1582 static struct snd_soc_dapm_widget *dapm_find_widget(
1583 struct snd_soc_dapm_context *dapm, const char *pin,
1584 bool search_other_contexts)
1586 struct snd_soc_dapm_widget *w;
1587 struct snd_soc_dapm_widget *fallback = NULL;
1589 list_for_each_entry(w, &dapm->card->widgets, list) {
1590 if (!strcmp(w->name, pin)) {
1591 if (w->dapm == dapm)
1598 if (search_other_contexts)
1604 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
1605 const char *pin, int status)
1607 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
1610 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
1614 w->connected = status;
1622 * snd_soc_dapm_sync - scan and power dapm paths
1623 * @dapm: DAPM context
1625 * Walks all dapm audio paths and powers widgets according to their
1626 * stream or path usage.
1628 * Returns 0 for success.
1630 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
1632 return dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
1634 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
1636 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
1637 const struct snd_soc_dapm_route *route)
1639 struct snd_soc_dapm_path *path;
1640 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
1641 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
1643 const char *control = route->control;
1645 char prefixed_sink[80];
1646 char prefixed_source[80];
1649 if (dapm->codec && dapm->codec->name_prefix) {
1650 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
1651 dapm->codec->name_prefix, route->sink);
1652 sink = prefixed_sink;
1653 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
1654 dapm->codec->name_prefix, route->source);
1655 source = prefixed_source;
1658 source = route->source;
1662 * find src and dest widgets over all widgets but favor a widget from
1663 * current DAPM context
1665 list_for_each_entry(w, &dapm->card->widgets, list) {
1666 if (!wsink && !(strcmp(w->name, sink))) {
1668 if (w->dapm == dapm)
1672 if (!wsource && !(strcmp(w->name, source))) {
1674 if (w->dapm == dapm)
1678 /* use widget from another DAPM context if not found from this */
1684 if (wsource == NULL || wsink == NULL)
1687 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
1691 path->source = wsource;
1693 path->connected = route->connected;
1694 INIT_LIST_HEAD(&path->list);
1695 INIT_LIST_HEAD(&path->list_source);
1696 INIT_LIST_HEAD(&path->list_sink);
1698 /* check for external widgets */
1699 if (wsink->id == snd_soc_dapm_input) {
1700 if (wsource->id == snd_soc_dapm_micbias ||
1701 wsource->id == snd_soc_dapm_mic ||
1702 wsource->id == snd_soc_dapm_line ||
1703 wsource->id == snd_soc_dapm_output)
1706 if (wsource->id == snd_soc_dapm_output) {
1707 if (wsink->id == snd_soc_dapm_spk ||
1708 wsink->id == snd_soc_dapm_hp ||
1709 wsink->id == snd_soc_dapm_line ||
1710 wsink->id == snd_soc_dapm_input)
1714 /* connect static paths */
1715 if (control == NULL) {
1716 list_add(&path->list, &dapm->card->paths);
1717 list_add(&path->list_sink, &wsink->sources);
1718 list_add(&path->list_source, &wsource->sinks);
1723 /* connect dynamic paths */
1724 switch (wsink->id) {
1725 case snd_soc_dapm_adc:
1726 case snd_soc_dapm_dac:
1727 case snd_soc_dapm_pga:
1728 case snd_soc_dapm_out_drv:
1729 case snd_soc_dapm_input:
1730 case snd_soc_dapm_output:
1731 case snd_soc_dapm_micbias:
1732 case snd_soc_dapm_vmid:
1733 case snd_soc_dapm_pre:
1734 case snd_soc_dapm_post:
1735 case snd_soc_dapm_supply:
1736 case snd_soc_dapm_aif_in:
1737 case snd_soc_dapm_aif_out:
1738 list_add(&path->list, &dapm->card->paths);
1739 list_add(&path->list_sink, &wsink->sources);
1740 list_add(&path->list_source, &wsource->sinks);
1743 case snd_soc_dapm_mux:
1744 case snd_soc_dapm_virt_mux:
1745 case snd_soc_dapm_value_mux:
1746 ret = dapm_connect_mux(dapm, wsource, wsink, path, control,
1747 &wsink->kcontrol_news[0]);
1751 case snd_soc_dapm_switch:
1752 case snd_soc_dapm_mixer:
1753 case snd_soc_dapm_mixer_named_ctl:
1754 ret = dapm_connect_mixer(dapm, wsource, wsink, path, control);
1758 case snd_soc_dapm_hp:
1759 case snd_soc_dapm_mic:
1760 case snd_soc_dapm_line:
1761 case snd_soc_dapm_spk:
1762 list_add(&path->list, &dapm->card->paths);
1763 list_add(&path->list_sink, &wsink->sources);
1764 list_add(&path->list_source, &wsource->sinks);
1771 dev_warn(dapm->dev, "asoc: no dapm match for %s --> %s --> %s\n",
1772 source, control, sink);
1778 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1779 * @dapm: DAPM context
1780 * @route: audio routes
1781 * @num: number of routes
1783 * Connects 2 dapm widgets together via a named audio path. The sink is
1784 * the widget receiving the audio signal, whilst the source is the sender
1785 * of the audio signal.
1787 * Returns 0 for success else error. On error all resources can be freed
1788 * with a call to snd_soc_card_free().
1790 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
1791 const struct snd_soc_dapm_route *route, int num)
1795 for (i = 0; i < num; i++) {
1796 ret = snd_soc_dapm_add_route(dapm, route);
1798 dev_err(dapm->dev, "Failed to add route %s->%s\n",
1799 route->source, route->sink);
1807 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
1810 * snd_soc_dapm_new_widgets - add new dapm widgets
1811 * @dapm: DAPM context
1813 * Checks the codec for any new dapm widgets and creates them if found.
1815 * Returns 0 for success.
1817 int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context *dapm)
1819 struct snd_soc_dapm_widget *w;
1822 list_for_each_entry(w, &dapm->card->widgets, list)
1827 if (w->num_kcontrols) {
1828 w->kcontrols = kzalloc(w->num_kcontrols *
1829 sizeof(struct snd_kcontrol *),
1836 case snd_soc_dapm_switch:
1837 case snd_soc_dapm_mixer:
1838 case snd_soc_dapm_mixer_named_ctl:
1839 w->power_check = dapm_generic_check_power;
1842 case snd_soc_dapm_mux:
1843 case snd_soc_dapm_virt_mux:
1844 case snd_soc_dapm_value_mux:
1845 w->power_check = dapm_generic_check_power;
1848 case snd_soc_dapm_adc:
1849 case snd_soc_dapm_aif_out:
1850 w->power_check = dapm_adc_check_power;
1852 case snd_soc_dapm_dac:
1853 case snd_soc_dapm_aif_in:
1854 w->power_check = dapm_dac_check_power;
1856 case snd_soc_dapm_pga:
1857 case snd_soc_dapm_out_drv:
1858 w->power_check = dapm_generic_check_power;
1861 case snd_soc_dapm_input:
1862 case snd_soc_dapm_output:
1863 case snd_soc_dapm_micbias:
1864 case snd_soc_dapm_spk:
1865 case snd_soc_dapm_hp:
1866 case snd_soc_dapm_mic:
1867 case snd_soc_dapm_line:
1868 w->power_check = dapm_generic_check_power;
1870 case snd_soc_dapm_supply:
1871 w->power_check = dapm_supply_check_power;
1872 case snd_soc_dapm_vmid:
1873 case snd_soc_dapm_pre:
1874 case snd_soc_dapm_post:
1878 /* Read the initial power state from the device */
1880 val = snd_soc_read(w->codec, w->reg);
1881 val &= 1 << w->shift;
1891 dapm_debugfs_add_widget(w);
1894 dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
1897 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
1900 * snd_soc_dapm_get_volsw - dapm mixer get callback
1901 * @kcontrol: mixer control
1902 * @ucontrol: control element information
1904 * Callback to get the value of a dapm mixer control.
1906 * Returns 0 for success.
1908 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
1909 struct snd_ctl_elem_value *ucontrol)
1911 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
1912 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
1913 struct soc_mixer_control *mc =
1914 (struct soc_mixer_control *)kcontrol->private_value;
1915 unsigned int reg = mc->reg;
1916 unsigned int shift = mc->shift;
1917 unsigned int rshift = mc->rshift;
1919 unsigned int invert = mc->invert;
1920 unsigned int mask = (1 << fls(max)) - 1;
1922 ucontrol->value.integer.value[0] =
1923 (snd_soc_read(widget->codec, reg) >> shift) & mask;
1924 if (shift != rshift)
1925 ucontrol->value.integer.value[1] =
1926 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
1928 ucontrol->value.integer.value[0] =
1929 max - ucontrol->value.integer.value[0];
1930 if (shift != rshift)
1931 ucontrol->value.integer.value[1] =
1932 max - ucontrol->value.integer.value[1];
1937 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
1940 * snd_soc_dapm_put_volsw - dapm mixer set callback
1941 * @kcontrol: mixer control
1942 * @ucontrol: control element information
1944 * Callback to set the value of a dapm mixer control.
1946 * Returns 0 for success.
1948 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
1949 struct snd_ctl_elem_value *ucontrol)
1951 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
1952 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
1953 struct snd_soc_codec *codec = widget->codec;
1954 struct soc_mixer_control *mc =
1955 (struct soc_mixer_control *)kcontrol->private_value;
1956 unsigned int reg = mc->reg;
1957 unsigned int shift = mc->shift;
1959 unsigned int mask = (1 << fls(max)) - 1;
1960 unsigned int invert = mc->invert;
1962 int connect, change;
1963 struct snd_soc_dapm_update update;
1966 val = (ucontrol->value.integer.value[0] & mask);
1970 mask = mask << shift;
1974 /* new connection */
1975 connect = invert ? 0 : 1;
1977 /* old connection must be powered down */
1978 connect = invert ? 1 : 0;
1980 mutex_lock(&codec->mutex);
1982 change = snd_soc_test_bits(widget->codec, reg, mask, val);
1984 for (wi = 0; wi < wlist->num_widgets; wi++) {
1985 widget = wlist->widgets[wi];
1987 widget->value = val;
1989 update.kcontrol = kcontrol;
1990 update.widget = widget;
1994 widget->dapm->update = &update;
1996 dapm_mixer_update_power(widget, kcontrol, connect);
1998 widget->dapm->update = NULL;
2002 mutex_unlock(&codec->mutex);
2005 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
2008 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
2009 * @kcontrol: mixer control
2010 * @ucontrol: control element information
2012 * Callback to get the value of a dapm enumerated double mixer control.
2014 * Returns 0 for success.
2016 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
2017 struct snd_ctl_elem_value *ucontrol)
2019 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2020 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2021 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2022 unsigned int val, bitmask;
2024 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2026 val = snd_soc_read(widget->codec, e->reg);
2027 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
2028 if (e->shift_l != e->shift_r)
2029 ucontrol->value.enumerated.item[1] =
2030 (val >> e->shift_r) & (bitmask - 1);
2034 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
2037 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
2038 * @kcontrol: mixer control
2039 * @ucontrol: control element information
2041 * Callback to set the value of a dapm enumerated double mixer control.
2043 * Returns 0 for success.
2045 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
2046 struct snd_ctl_elem_value *ucontrol)
2048 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2049 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2050 struct snd_soc_codec *codec = widget->codec;
2051 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2052 unsigned int val, mux, change;
2053 unsigned int mask, bitmask;
2054 struct snd_soc_dapm_update update;
2057 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2059 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2061 mux = ucontrol->value.enumerated.item[0];
2062 val = mux << e->shift_l;
2063 mask = (bitmask - 1) << e->shift_l;
2064 if (e->shift_l != e->shift_r) {
2065 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2067 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2068 mask |= (bitmask - 1) << e->shift_r;
2071 mutex_lock(&codec->mutex);
2073 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2075 for (wi = 0; wi < wlist->num_widgets; wi++) {
2076 widget = wlist->widgets[wi];
2078 widget->value = val;
2080 update.kcontrol = kcontrol;
2081 update.widget = widget;
2082 update.reg = e->reg;
2085 widget->dapm->update = &update;
2087 dapm_mux_update_power(widget, kcontrol, change, mux, e);
2089 widget->dapm->update = NULL;
2093 mutex_unlock(&codec->mutex);
2096 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
2099 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
2100 * @kcontrol: mixer control
2101 * @ucontrol: control element information
2103 * Returns 0 for success.
2105 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
2106 struct snd_ctl_elem_value *ucontrol)
2108 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2109 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2111 ucontrol->value.enumerated.item[0] = widget->value;
2115 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt);
2118 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
2119 * @kcontrol: mixer control
2120 * @ucontrol: control element information
2122 * Returns 0 for success.
2124 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
2125 struct snd_ctl_elem_value *ucontrol)
2127 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2128 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2129 struct snd_soc_codec *codec = widget->codec;
2130 struct soc_enum *e =
2131 (struct soc_enum *)kcontrol->private_value;
2136 if (ucontrol->value.enumerated.item[0] >= e->max)
2139 mutex_lock(&codec->mutex);
2141 change = widget->value != ucontrol->value.enumerated.item[0];
2143 for (wi = 0; wi < wlist->num_widgets; wi++) {
2144 widget = wlist->widgets[wi];
2146 widget->value = ucontrol->value.enumerated.item[0];
2148 dapm_mux_update_power(widget, kcontrol, change,
2153 mutex_unlock(&codec->mutex);
2156 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt);
2159 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
2161 * @kcontrol: mixer control
2162 * @ucontrol: control element information
2164 * Callback to get the value of a dapm semi enumerated double mixer control.
2166 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2167 * used for handling bitfield coded enumeration for example.
2169 * Returns 0 for success.
2171 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
2172 struct snd_ctl_elem_value *ucontrol)
2174 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2175 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2176 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2177 unsigned int reg_val, val, mux;
2179 reg_val = snd_soc_read(widget->codec, e->reg);
2180 val = (reg_val >> e->shift_l) & e->mask;
2181 for (mux = 0; mux < e->max; mux++) {
2182 if (val == e->values[mux])
2185 ucontrol->value.enumerated.item[0] = mux;
2186 if (e->shift_l != e->shift_r) {
2187 val = (reg_val >> e->shift_r) & e->mask;
2188 for (mux = 0; mux < e->max; mux++) {
2189 if (val == e->values[mux])
2192 ucontrol->value.enumerated.item[1] = mux;
2197 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
2200 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
2202 * @kcontrol: mixer control
2203 * @ucontrol: control element information
2205 * Callback to set the value of a dapm semi enumerated double mixer control.
2207 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2208 * used for handling bitfield coded enumeration for example.
2210 * Returns 0 for success.
2212 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
2213 struct snd_ctl_elem_value *ucontrol)
2215 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2216 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2217 struct snd_soc_codec *codec = widget->codec;
2218 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2219 unsigned int val, mux, change;
2221 struct snd_soc_dapm_update update;
2224 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2226 mux = ucontrol->value.enumerated.item[0];
2227 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2228 mask = e->mask << e->shift_l;
2229 if (e->shift_l != e->shift_r) {
2230 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2232 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2233 mask |= e->mask << e->shift_r;
2236 mutex_lock(&codec->mutex);
2238 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2240 for (wi = 0; wi < wlist->num_widgets; wi++) {
2241 widget = wlist->widgets[wi];
2243 widget->value = val;
2245 update.kcontrol = kcontrol;
2246 update.widget = widget;
2247 update.reg = e->reg;
2250 widget->dapm->update = &update;
2252 dapm_mux_update_power(widget, kcontrol, change, mux, e);
2254 widget->dapm->update = NULL;
2258 mutex_unlock(&codec->mutex);
2261 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
2264 * snd_soc_dapm_info_pin_switch - Info for a pin switch
2266 * @kcontrol: mixer control
2267 * @uinfo: control element information
2269 * Callback to provide information about a pin switch control.
2271 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
2272 struct snd_ctl_elem_info *uinfo)
2274 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2276 uinfo->value.integer.min = 0;
2277 uinfo->value.integer.max = 1;
2281 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
2284 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
2286 * @kcontrol: mixer control
2289 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
2290 struct snd_ctl_elem_value *ucontrol)
2292 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2293 const char *pin = (const char *)kcontrol->private_value;
2295 mutex_lock(&codec->mutex);
2297 ucontrol->value.integer.value[0] =
2298 snd_soc_dapm_get_pin_status(&codec->dapm, pin);
2300 mutex_unlock(&codec->mutex);
2304 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
2307 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
2309 * @kcontrol: mixer control
2312 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
2313 struct snd_ctl_elem_value *ucontrol)
2315 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2316 const char *pin = (const char *)kcontrol->private_value;
2318 mutex_lock(&codec->mutex);
2320 if (ucontrol->value.integer.value[0])
2321 snd_soc_dapm_enable_pin(&codec->dapm, pin);
2323 snd_soc_dapm_disable_pin(&codec->dapm, pin);
2325 snd_soc_dapm_sync(&codec->dapm);
2327 mutex_unlock(&codec->mutex);
2331 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
2334 * snd_soc_dapm_new_control - create new dapm control
2335 * @dapm: DAPM context
2336 * @widget: widget template
2338 * Creates a new dapm control based upon the template.
2340 * Returns 0 for success else error.
2342 int snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
2343 const struct snd_soc_dapm_widget *widget)
2345 struct snd_soc_dapm_widget *w;
2348 if ((w = dapm_cnew_widget(widget)) == NULL)
2351 name_len = strlen(widget->name) + 1;
2352 if (dapm->codec && dapm->codec->name_prefix)
2353 name_len += 1 + strlen(dapm->codec->name_prefix);
2354 w->name = kmalloc(name_len, GFP_KERNEL);
2355 if (w->name == NULL) {
2359 if (dapm->codec && dapm->codec->name_prefix)
2360 snprintf(w->name, name_len, "%s %s",
2361 dapm->codec->name_prefix, widget->name);
2363 snprintf(w->name, name_len, "%s", widget->name);
2367 w->codec = dapm->codec;
2368 INIT_LIST_HEAD(&w->sources);
2369 INIT_LIST_HEAD(&w->sinks);
2370 INIT_LIST_HEAD(&w->list);
2371 list_add(&w->list, &dapm->card->widgets);
2373 /* machine layer set ups unconnected pins and insertions */
2377 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
2380 * snd_soc_dapm_new_controls - create new dapm controls
2381 * @dapm: DAPM context
2382 * @widget: widget array
2383 * @num: number of widgets
2385 * Creates new DAPM controls based upon the templates.
2387 * Returns 0 for success else error.
2389 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
2390 const struct snd_soc_dapm_widget *widget,
2395 for (i = 0; i < num; i++) {
2396 ret = snd_soc_dapm_new_control(dapm, widget);
2399 "ASoC: Failed to create DAPM control %s: %d\n",
2407 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
2409 static void soc_dapm_stream_event(struct snd_soc_dapm_context *dapm,
2410 const char *stream, int event)
2412 struct snd_soc_dapm_widget *w;
2414 list_for_each_entry(w, &dapm->card->widgets, list)
2416 if (!w->sname || w->dapm != dapm)
2418 dev_dbg(w->dapm->dev, "widget %s\n %s stream %s event %d\n",
2419 w->name, w->sname, stream, event);
2420 if (strstr(w->sname, stream)) {
2422 case SND_SOC_DAPM_STREAM_START:
2425 case SND_SOC_DAPM_STREAM_STOP:
2428 case SND_SOC_DAPM_STREAM_SUSPEND:
2429 case SND_SOC_DAPM_STREAM_RESUME:
2430 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
2431 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
2437 dapm_power_widgets(dapm, event);
2441 * snd_soc_dapm_stream_event - send a stream event to the dapm core
2442 * @rtd: PCM runtime data
2443 * @stream: stream name
2444 * @event: stream event
2446 * Sends a stream event to the dapm core. The core then makes any
2447 * necessary widget power changes.
2449 * Returns 0 for success else error.
2451 int snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd,
2452 const char *stream, int event)
2454 struct snd_soc_codec *codec = rtd->codec;
2459 mutex_lock(&codec->mutex);
2460 soc_dapm_stream_event(&codec->dapm, stream, event);
2461 mutex_unlock(&codec->mutex);
2466 * snd_soc_dapm_enable_pin - enable pin.
2467 * @dapm: DAPM context
2470 * Enables input/output pin and its parents or children widgets iff there is
2471 * a valid audio route and active audio stream.
2472 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2473 * do any widget power switching.
2475 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
2477 return snd_soc_dapm_set_pin(dapm, pin, 1);
2479 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
2482 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
2483 * @dapm: DAPM context
2486 * Enables input/output pin regardless of any other state. This is
2487 * intended for use with microphone bias supplies used in microphone
2490 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2491 * do any widget power switching.
2493 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
2496 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2499 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
2503 dev_dbg(w->dapm->dev, "dapm: force enable pin %s\n", pin);
2509 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
2512 * snd_soc_dapm_disable_pin - disable pin.
2513 * @dapm: DAPM context
2516 * Disables input/output pin and its parents or children widgets.
2517 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2518 * do any widget power switching.
2520 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
2523 return snd_soc_dapm_set_pin(dapm, pin, 0);
2525 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
2528 * snd_soc_dapm_nc_pin - permanently disable pin.
2529 * @dapm: DAPM context
2532 * Marks the specified pin as being not connected, disabling it along
2533 * any parent or child widgets. At present this is identical to
2534 * snd_soc_dapm_disable_pin() but in future it will be extended to do
2535 * additional things such as disabling controls which only affect
2536 * paths through the pin.
2538 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2539 * do any widget power switching.
2541 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
2543 return snd_soc_dapm_set_pin(dapm, pin, 0);
2545 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
2548 * snd_soc_dapm_get_pin_status - get audio pin status
2549 * @dapm: DAPM context
2550 * @pin: audio signal pin endpoint (or start point)
2552 * Get audio pin status - connected or disconnected.
2554 * Returns 1 for connected otherwise 0.
2556 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
2559 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2562 return w->connected;
2566 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
2569 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
2570 * @dapm: DAPM context
2571 * @pin: audio signal pin endpoint (or start point)
2573 * Mark the given endpoint or pin as ignoring suspend. When the
2574 * system is disabled a path between two endpoints flagged as ignoring
2575 * suspend will not be disabled. The path must already be enabled via
2576 * normal means at suspend time, it will not be turned on if it was not
2579 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
2582 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
2585 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
2589 w->ignore_suspend = 1;
2593 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
2596 * snd_soc_dapm_free - free dapm resources
2599 * Free all dapm widgets and resources.
2601 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
2603 snd_soc_dapm_sys_remove(dapm->dev);
2604 dapm_debugfs_cleanup(dapm);
2605 dapm_free_widgets(dapm);
2606 list_del(&dapm->list);
2608 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
2610 static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context *dapm)
2612 struct snd_soc_dapm_widget *w;
2613 LIST_HEAD(down_list);
2616 list_for_each_entry(w, &dapm->card->widgets, list) {
2617 if (w->dapm != dapm)
2620 dapm_seq_insert(w, &down_list, false);
2626 /* If there were no widgets to power down we're already in
2630 snd_soc_dapm_set_bias_level(dapm, SND_SOC_BIAS_PREPARE);
2631 dapm_seq_run(dapm, &down_list, 0, false);
2632 snd_soc_dapm_set_bias_level(dapm, SND_SOC_BIAS_STANDBY);
2637 * snd_soc_dapm_shutdown - callback for system shutdown
2639 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
2641 struct snd_soc_codec *codec;
2643 list_for_each_entry(codec, &card->codec_dev_list, list) {
2644 soc_dapm_shutdown_codec(&codec->dapm);
2645 snd_soc_dapm_set_bias_level(&codec->dapm, SND_SOC_BIAS_OFF);
2649 /* Module information */
2650 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2651 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
2652 MODULE_LICENSE("GPL");