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) {
602 if (path->sink && path->connect) {
604 con += is_connected_output_ep(path->sink);
612 * Recursively check for a completed path to an active or physically connected
613 * input widget. Returns number of complete paths.
615 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
617 struct snd_soc_dapm_path *path;
620 if (widget->id == snd_soc_dapm_supply)
623 /* active stream ? */
624 switch (widget->id) {
625 case snd_soc_dapm_dac:
626 case snd_soc_dapm_aif_in:
628 return snd_soc_dapm_suspend_check(widget);
633 if (widget->connected) {
634 /* connected pin ? */
635 if (widget->id == snd_soc_dapm_input && !widget->ext)
636 return snd_soc_dapm_suspend_check(widget);
638 /* connected VMID/Bias for lower pops */
639 if (widget->id == snd_soc_dapm_vmid)
640 return snd_soc_dapm_suspend_check(widget);
642 /* connected jack ? */
643 if (widget->id == snd_soc_dapm_mic ||
644 (widget->id == snd_soc_dapm_line && !list_empty(&widget->sinks)))
645 return snd_soc_dapm_suspend_check(widget);
648 list_for_each_entry(path, &widget->sources, list_sink) {
655 if (path->source && path->connect) {
657 con += is_connected_input_ep(path->source);
665 * Handler for generic register modifier widget.
667 int dapm_reg_event(struct snd_soc_dapm_widget *w,
668 struct snd_kcontrol *kcontrol, int event)
672 if (SND_SOC_DAPM_EVENT_ON(event))
677 snd_soc_update_bits(w->codec, -(w->reg + 1),
678 w->mask << w->shift, val << w->shift);
682 EXPORT_SYMBOL_GPL(dapm_reg_event);
684 /* Generic check to see if a widget should be powered.
686 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
690 in = is_connected_input_ep(w);
691 dapm_clear_walk(w->dapm);
692 out = is_connected_output_ep(w);
693 dapm_clear_walk(w->dapm);
694 return out != 0 && in != 0;
697 /* Check to see if an ADC has power */
698 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
703 in = is_connected_input_ep(w);
704 dapm_clear_walk(w->dapm);
707 return dapm_generic_check_power(w);
711 /* Check to see if a DAC has power */
712 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
717 out = is_connected_output_ep(w);
718 dapm_clear_walk(w->dapm);
721 return dapm_generic_check_power(w);
725 /* Check to see if a power supply is needed */
726 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
728 struct snd_soc_dapm_path *path;
731 /* Check if one of our outputs is connected */
732 list_for_each_entry(path, &w->sinks, list_source) {
736 if (path->connected &&
737 !path->connected(path->source, path->sink))
743 if (path->sink->force) {
748 if (path->sink->power_check &&
749 path->sink->power_check(path->sink)) {
755 dapm_clear_walk(w->dapm);
760 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
761 struct snd_soc_dapm_widget *b,
769 sort = dapm_down_seq;
771 if (sort[a->id] != sort[b->id])
772 return sort[a->id] - sort[b->id];
773 if (a->subseq != b->subseq) {
775 return a->subseq - b->subseq;
777 return b->subseq - a->subseq;
779 if (a->reg != b->reg)
780 return a->reg - b->reg;
781 if (a->dapm != b->dapm)
782 return (unsigned long)a->dapm - (unsigned long)b->dapm;
787 /* Insert a widget in order into a DAPM power sequence. */
788 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
789 struct list_head *list,
792 struct snd_soc_dapm_widget *w;
794 list_for_each_entry(w, list, power_list)
795 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
796 list_add_tail(&new_widget->power_list, &w->power_list);
800 list_add_tail(&new_widget->power_list, list);
803 static void dapm_seq_check_event(struct snd_soc_dapm_context *dapm,
804 struct snd_soc_dapm_widget *w, int event)
806 struct snd_soc_card *card = dapm->card;
811 case SND_SOC_DAPM_PRE_PMU:
815 case SND_SOC_DAPM_POST_PMU:
816 ev_name = "POST_PMU";
819 case SND_SOC_DAPM_PRE_PMD:
823 case SND_SOC_DAPM_POST_PMD:
824 ev_name = "POST_PMD";
832 if (w->power != power)
835 if (w->event && (w->event_flags & event)) {
836 pop_dbg(dapm->dev, card->pop_time, "pop test : %s %s\n",
838 trace_snd_soc_dapm_widget_event_start(w, event);
839 ret = w->event(w, NULL, event);
840 trace_snd_soc_dapm_widget_event_done(w, event);
842 pr_err("%s: %s event failed: %d\n",
843 ev_name, w->name, ret);
847 /* Apply the coalesced changes from a DAPM sequence */
848 static void dapm_seq_run_coalesced(struct snd_soc_dapm_context *dapm,
849 struct list_head *pending)
851 struct snd_soc_card *card = dapm->card;
852 struct snd_soc_dapm_widget *w;
854 unsigned int value = 0;
855 unsigned int mask = 0;
856 unsigned int cur_mask;
858 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
861 list_for_each_entry(w, pending, power_list) {
862 cur_mask = 1 << w->shift;
863 BUG_ON(reg != w->reg);
874 pop_dbg(dapm->dev, card->pop_time,
875 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
876 w->name, reg, value, mask);
878 /* Check for events */
879 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMU);
880 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMD);
884 pop_dbg(dapm->dev, card->pop_time,
885 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
886 value, mask, reg, card->pop_time);
887 pop_wait(card->pop_time);
888 snd_soc_update_bits(dapm->codec, reg, mask, value);
891 list_for_each_entry(w, pending, power_list) {
892 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMU);
893 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMD);
897 /* Apply a DAPM power sequence.
899 * We walk over a pre-sorted list of widgets to apply power to. In
900 * order to minimise the number of writes to the device required
901 * multiple widgets will be updated in a single write where possible.
902 * Currently anything that requires more than a single write is not
905 static void dapm_seq_run(struct snd_soc_dapm_context *dapm,
906 struct list_head *list, int event, bool power_up)
908 struct snd_soc_dapm_widget *w, *n;
912 int cur_reg = SND_SOC_NOPM;
913 struct snd_soc_dapm_context *cur_dapm = NULL;
920 sort = dapm_down_seq;
922 list_for_each_entry_safe(w, n, list, power_list) {
925 /* Do we need to apply any queued changes? */
926 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
927 w->dapm != cur_dapm || w->subseq != cur_subseq) {
928 if (!list_empty(&pending))
929 dapm_seq_run_coalesced(cur_dapm, &pending);
931 if (cur_dapm && cur_dapm->seq_notifier) {
932 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
933 if (sort[i] == cur_sort)
934 cur_dapm->seq_notifier(cur_dapm,
939 INIT_LIST_HEAD(&pending);
942 cur_reg = SND_SOC_NOPM;
947 case snd_soc_dapm_pre:
949 list_for_each_entry_safe_continue(w, n, list,
952 if (event == SND_SOC_DAPM_STREAM_START)
954 NULL, SND_SOC_DAPM_PRE_PMU);
955 else if (event == SND_SOC_DAPM_STREAM_STOP)
957 NULL, SND_SOC_DAPM_PRE_PMD);
960 case snd_soc_dapm_post:
962 list_for_each_entry_safe_continue(w, n, list,
965 if (event == SND_SOC_DAPM_STREAM_START)
967 NULL, SND_SOC_DAPM_POST_PMU);
968 else if (event == SND_SOC_DAPM_STREAM_STOP)
970 NULL, SND_SOC_DAPM_POST_PMD);
974 /* Queue it up for application */
975 cur_sort = sort[w->id];
976 cur_subseq = w->subseq;
979 list_move(&w->power_list, &pending);
984 dev_err(w->dapm->dev,
985 "Failed to apply widget power: %d\n", ret);
988 if (!list_empty(&pending))
989 dapm_seq_run_coalesced(cur_dapm, &pending);
991 if (cur_dapm && cur_dapm->seq_notifier) {
992 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
993 if (sort[i] == cur_sort)
994 cur_dapm->seq_notifier(cur_dapm,
999 static void dapm_widget_update(struct snd_soc_dapm_context *dapm)
1001 struct snd_soc_dapm_update *update = dapm->update;
1002 struct snd_soc_dapm_widget *w;
1011 (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
1012 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
1014 pr_err("%s DAPM pre-event failed: %d\n",
1018 ret = snd_soc_update_bits(w->codec, update->reg, update->mask,
1021 pr_err("%s DAPM update failed: %d\n", w->name, ret);
1024 (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1025 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1027 pr_err("%s DAPM post-event failed: %d\n",
1032 /* Async callback run prior to DAPM sequences - brings to _PREPARE if
1033 * they're changing state.
1035 static void dapm_pre_sequence_async(void *data, async_cookie_t cookie)
1037 struct snd_soc_dapm_context *d = data;
1040 /* If we're off and we're not supposed to be go into STANDBY */
1041 if (d->bias_level == SND_SOC_BIAS_OFF &&
1042 d->target_bias_level != SND_SOC_BIAS_OFF) {
1043 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1046 "Failed to turn on bias: %d\n", ret);
1049 /* Prepare for a STADDBY->ON or ON->STANDBY transition */
1050 if (d->bias_level != d->target_bias_level) {
1051 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);
1054 "Failed to prepare bias: %d\n", ret);
1058 /* Async callback run prior to DAPM sequences - brings to their final
1061 static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
1063 struct snd_soc_dapm_context *d = data;
1066 /* If we just powered the last thing off drop to standby bias */
1067 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1068 (d->target_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_STANDBY);
1072 dev_err(d->dev, "Failed to apply standby bias: %d\n",
1076 /* If we're in standby and can support bias off then do that */
1077 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1078 d->target_bias_level == SND_SOC_BIAS_OFF) {
1079 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);
1081 dev_err(d->dev, "Failed to turn off bias: %d\n", ret);
1084 /* If we just powered up then move to active bias */
1085 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1086 d->target_bias_level == SND_SOC_BIAS_ON) {
1087 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);
1089 dev_err(d->dev, "Failed to apply active bias: %d\n",
1095 * Scan each dapm widget for complete audio path.
1096 * A complete path is a route that has valid endpoints i.e.:-
1098 * o DAC to output pin.
1099 * o Input Pin to ADC.
1100 * o Input pin to Output pin (bypass, sidetone)
1101 * o DAC to ADC (loopback).
1103 static int dapm_power_widgets(struct snd_soc_dapm_context *dapm, int event)
1105 struct snd_soc_card *card = dapm->card;
1106 struct snd_soc_dapm_widget *w;
1107 struct snd_soc_dapm_context *d;
1109 LIST_HEAD(down_list);
1110 LIST_HEAD(async_domain);
1111 enum snd_soc_bias_level bias;
1114 trace_snd_soc_dapm_start(card);
1116 list_for_each_entry(d, &card->dapm_list, list) {
1117 if (d->n_widgets || d->codec == NULL) {
1118 if (d->idle_bias_off)
1119 d->target_bias_level = SND_SOC_BIAS_OFF;
1121 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1125 /* Check which widgets we need to power and store them in
1126 * lists indicating if they should be powered up or down.
1128 list_for_each_entry(w, &card->widgets, list) {
1130 case snd_soc_dapm_pre:
1131 dapm_seq_insert(w, &down_list, false);
1133 case snd_soc_dapm_post:
1134 dapm_seq_insert(w, &up_list, true);
1138 if (!w->power_check)
1142 power = w->power_check(w);
1149 /* Supplies and micbiases only bring
1150 * the context up to STANDBY as unless
1151 * something else is active and
1152 * passing audio they generally don't
1153 * require full power.
1156 case snd_soc_dapm_supply:
1157 case snd_soc_dapm_micbias:
1158 if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
1159 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1162 d->target_bias_level = SND_SOC_BIAS_ON;
1167 if (w->power == power)
1170 trace_snd_soc_dapm_widget_power(w, power);
1173 dapm_seq_insert(w, &up_list, true);
1175 dapm_seq_insert(w, &down_list, false);
1182 /* If there are no DAPM widgets then try to figure out power from the
1185 if (!dapm->n_widgets) {
1187 case SND_SOC_DAPM_STREAM_START:
1188 case SND_SOC_DAPM_STREAM_RESUME:
1189 dapm->target_bias_level = SND_SOC_BIAS_ON;
1191 case SND_SOC_DAPM_STREAM_STOP:
1192 if (dapm->codec->active)
1193 dapm->target_bias_level = SND_SOC_BIAS_ON;
1195 dapm->target_bias_level = SND_SOC_BIAS_STANDBY;
1197 case SND_SOC_DAPM_STREAM_SUSPEND:
1198 dapm->target_bias_level = SND_SOC_BIAS_STANDBY;
1200 case SND_SOC_DAPM_STREAM_NOP:
1201 dapm->target_bias_level = dapm->bias_level;
1208 /* Force all contexts in the card to the same bias state */
1209 bias = SND_SOC_BIAS_OFF;
1210 list_for_each_entry(d, &card->dapm_list, list)
1211 if (d->target_bias_level > bias)
1212 bias = d->target_bias_level;
1213 list_for_each_entry(d, &card->dapm_list, list)
1214 d->target_bias_level = bias;
1217 /* Run all the bias changes in parallel */
1218 list_for_each_entry(d, &dapm->card->dapm_list, list)
1219 async_schedule_domain(dapm_pre_sequence_async, d,
1221 async_synchronize_full_domain(&async_domain);
1223 /* Power down widgets first; try to avoid amplifying pops. */
1224 dapm_seq_run(dapm, &down_list, event, false);
1226 dapm_widget_update(dapm);
1229 dapm_seq_run(dapm, &up_list, event, true);
1231 /* Run all the bias changes in parallel */
1232 list_for_each_entry(d, &dapm->card->dapm_list, list)
1233 async_schedule_domain(dapm_post_sequence_async, d,
1235 async_synchronize_full_domain(&async_domain);
1237 pop_dbg(dapm->dev, card->pop_time,
1238 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
1239 pop_wait(card->pop_time);
1241 trace_snd_soc_dapm_done(card);
1246 #ifdef CONFIG_DEBUG_FS
1247 static int dapm_widget_power_open_file(struct inode *inode, struct file *file)
1249 file->private_data = inode->i_private;
1253 static ssize_t dapm_widget_power_read_file(struct file *file,
1254 char __user *user_buf,
1255 size_t count, loff_t *ppos)
1257 struct snd_soc_dapm_widget *w = file->private_data;
1261 struct snd_soc_dapm_path *p = NULL;
1263 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1267 in = is_connected_input_ep(w);
1268 dapm_clear_walk(w->dapm);
1269 out = is_connected_output_ep(w);
1270 dapm_clear_walk(w->dapm);
1272 ret = snprintf(buf, PAGE_SIZE, "%s: %s in %d out %d",
1273 w->name, w->power ? "On" : "Off", in, out);
1276 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1277 " - R%d(0x%x) bit %d",
1278 w->reg, w->reg, w->shift);
1280 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1283 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1285 w->active ? "active" : "inactive");
1287 list_for_each_entry(p, &w->sources, list_sink) {
1288 if (p->connected && !p->connected(w, p->sink))
1292 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1293 " in \"%s\" \"%s\"\n",
1294 p->name ? p->name : "static",
1297 list_for_each_entry(p, &w->sinks, list_source) {
1298 if (p->connected && !p->connected(w, p->sink))
1302 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1303 " out \"%s\" \"%s\"\n",
1304 p->name ? p->name : "static",
1308 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1314 static const struct file_operations dapm_widget_power_fops = {
1315 .open = dapm_widget_power_open_file,
1316 .read = dapm_widget_power_read_file,
1317 .llseek = default_llseek,
1320 static int dapm_bias_open_file(struct inode *inode, struct file *file)
1322 file->private_data = inode->i_private;
1326 static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
1327 size_t count, loff_t *ppos)
1329 struct snd_soc_dapm_context *dapm = file->private_data;
1332 switch (dapm->bias_level) {
1333 case SND_SOC_BIAS_ON:
1336 case SND_SOC_BIAS_PREPARE:
1337 level = "Prepare\n";
1339 case SND_SOC_BIAS_STANDBY:
1340 level = "Standby\n";
1342 case SND_SOC_BIAS_OFF:
1347 level = "Unknown\n";
1351 return simple_read_from_buffer(user_buf, count, ppos, level,
1355 static const struct file_operations dapm_bias_fops = {
1356 .open = dapm_bias_open_file,
1357 .read = dapm_bias_read_file,
1358 .llseek = default_llseek,
1361 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1362 struct dentry *parent)
1366 dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
1368 if (!dapm->debugfs_dapm) {
1370 "Failed to create DAPM debugfs directory\n");
1374 d = debugfs_create_file("bias_level", 0444,
1375 dapm->debugfs_dapm, dapm,
1379 "ASoC: Failed to create bias level debugfs file\n");
1382 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1384 struct snd_soc_dapm_context *dapm = w->dapm;
1387 if (!dapm->debugfs_dapm || !w->name)
1390 d = debugfs_create_file(w->name, 0444,
1391 dapm->debugfs_dapm, w,
1392 &dapm_widget_power_fops);
1394 dev_warn(w->dapm->dev,
1395 "ASoC: Failed to create %s debugfs file\n",
1399 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1401 debugfs_remove_recursive(dapm->debugfs_dapm);
1405 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1406 struct dentry *parent)
1410 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1414 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1420 /* test and update the power status of a mux widget */
1421 static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1422 struct snd_kcontrol *kcontrol, int change,
1423 int mux, struct soc_enum *e)
1425 struct snd_soc_dapm_path *path;
1428 if (widget->id != snd_soc_dapm_mux &&
1429 widget->id != snd_soc_dapm_virt_mux &&
1430 widget->id != snd_soc_dapm_value_mux)
1436 /* find dapm widget path assoc with kcontrol */
1437 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1438 if (path->kcontrol != kcontrol)
1441 if (!path->name || !e->texts[mux])
1445 /* we now need to match the string in the enum to the path */
1446 if (!(strcmp(path->name, e->texts[mux])))
1447 path->connect = 1; /* new connection */
1449 path->connect = 0; /* old connection must be powered down */
1453 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1458 /* test and update the power status of a mixer or switch widget */
1459 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1460 struct snd_kcontrol *kcontrol, int connect)
1462 struct snd_soc_dapm_path *path;
1465 if (widget->id != snd_soc_dapm_mixer &&
1466 widget->id != snd_soc_dapm_mixer_named_ctl &&
1467 widget->id != snd_soc_dapm_switch)
1470 /* find dapm widget path assoc with kcontrol */
1471 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1472 if (path->kcontrol != kcontrol)
1475 /* found, now check type */
1477 path->connect = connect;
1482 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1487 /* show dapm widget status in sys fs */
1488 static ssize_t dapm_widget_show(struct device *dev,
1489 struct device_attribute *attr, char *buf)
1491 struct snd_soc_pcm_runtime *rtd =
1492 container_of(dev, struct snd_soc_pcm_runtime, dev);
1493 struct snd_soc_codec *codec =rtd->codec;
1494 struct snd_soc_dapm_widget *w;
1496 char *state = "not set";
1498 list_for_each_entry(w, &codec->card->widgets, list) {
1499 if (w->dapm != &codec->dapm)
1502 /* only display widgets that burnm power */
1504 case snd_soc_dapm_hp:
1505 case snd_soc_dapm_mic:
1506 case snd_soc_dapm_spk:
1507 case snd_soc_dapm_line:
1508 case snd_soc_dapm_micbias:
1509 case snd_soc_dapm_dac:
1510 case snd_soc_dapm_adc:
1511 case snd_soc_dapm_pga:
1512 case snd_soc_dapm_out_drv:
1513 case snd_soc_dapm_mixer:
1514 case snd_soc_dapm_mixer_named_ctl:
1515 case snd_soc_dapm_supply:
1517 count += sprintf(buf + count, "%s: %s\n",
1518 w->name, w->power ? "On":"Off");
1525 switch (codec->dapm.bias_level) {
1526 case SND_SOC_BIAS_ON:
1529 case SND_SOC_BIAS_PREPARE:
1532 case SND_SOC_BIAS_STANDBY:
1535 case SND_SOC_BIAS_OFF:
1539 count += sprintf(buf + count, "PM State: %s\n", state);
1544 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
1546 int snd_soc_dapm_sys_add(struct device *dev)
1548 return device_create_file(dev, &dev_attr_dapm_widget);
1551 static void snd_soc_dapm_sys_remove(struct device *dev)
1553 device_remove_file(dev, &dev_attr_dapm_widget);
1556 /* free all dapm widgets and resources */
1557 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
1559 struct snd_soc_dapm_widget *w, *next_w;
1560 struct snd_soc_dapm_path *p, *next_p;
1562 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
1563 if (w->dapm != dapm)
1567 * remove source and sink paths associated to this widget.
1568 * While removing the path, remove reference to it from both
1569 * source and sink widgets so that path is removed only once.
1571 list_for_each_entry_safe(p, next_p, &w->sources, list_sink) {
1572 list_del(&p->list_sink);
1573 list_del(&p->list_source);
1575 kfree(p->long_name);
1578 list_for_each_entry_safe(p, next_p, &w->sinks, list_source) {
1579 list_del(&p->list_sink);
1580 list_del(&p->list_source);
1582 kfree(p->long_name);
1585 kfree(w->kcontrols);
1591 static struct snd_soc_dapm_widget *dapm_find_widget(
1592 struct snd_soc_dapm_context *dapm, const char *pin,
1593 bool search_other_contexts)
1595 struct snd_soc_dapm_widget *w;
1596 struct snd_soc_dapm_widget *fallback = NULL;
1598 list_for_each_entry(w, &dapm->card->widgets, list) {
1599 if (!strcmp(w->name, pin)) {
1600 if (w->dapm == dapm)
1607 if (search_other_contexts)
1613 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
1614 const char *pin, int status)
1616 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
1619 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
1623 w->connected = status;
1631 * snd_soc_dapm_sync - scan and power dapm paths
1632 * @dapm: DAPM context
1634 * Walks all dapm audio paths and powers widgets according to their
1635 * stream or path usage.
1637 * Returns 0 for success.
1639 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
1641 return dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
1643 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
1645 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
1646 const struct snd_soc_dapm_route *route)
1648 struct snd_soc_dapm_path *path;
1649 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
1650 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
1652 const char *control = route->control;
1654 char prefixed_sink[80];
1655 char prefixed_source[80];
1658 if (dapm->codec && dapm->codec->name_prefix) {
1659 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
1660 dapm->codec->name_prefix, route->sink);
1661 sink = prefixed_sink;
1662 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
1663 dapm->codec->name_prefix, route->source);
1664 source = prefixed_source;
1667 source = route->source;
1671 * find src and dest widgets over all widgets but favor a widget from
1672 * current DAPM context
1674 list_for_each_entry(w, &dapm->card->widgets, list) {
1675 if (!wsink && !(strcmp(w->name, sink))) {
1677 if (w->dapm == dapm)
1681 if (!wsource && !(strcmp(w->name, source))) {
1683 if (w->dapm == dapm)
1687 /* use widget from another DAPM context if not found from this */
1693 if (wsource == NULL || wsink == NULL)
1696 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
1700 path->source = wsource;
1702 path->connected = route->connected;
1703 INIT_LIST_HEAD(&path->list);
1704 INIT_LIST_HEAD(&path->list_source);
1705 INIT_LIST_HEAD(&path->list_sink);
1707 /* check for external widgets */
1708 if (wsink->id == snd_soc_dapm_input) {
1709 if (wsource->id == snd_soc_dapm_micbias ||
1710 wsource->id == snd_soc_dapm_mic ||
1711 wsource->id == snd_soc_dapm_line ||
1712 wsource->id == snd_soc_dapm_output)
1715 if (wsource->id == snd_soc_dapm_output) {
1716 if (wsink->id == snd_soc_dapm_spk ||
1717 wsink->id == snd_soc_dapm_hp ||
1718 wsink->id == snd_soc_dapm_line ||
1719 wsink->id == snd_soc_dapm_input)
1723 /* connect static paths */
1724 if (control == NULL) {
1725 list_add(&path->list, &dapm->card->paths);
1726 list_add(&path->list_sink, &wsink->sources);
1727 list_add(&path->list_source, &wsource->sinks);
1732 /* connect dynamic paths */
1733 switch (wsink->id) {
1734 case snd_soc_dapm_adc:
1735 case snd_soc_dapm_dac:
1736 case snd_soc_dapm_pga:
1737 case snd_soc_dapm_out_drv:
1738 case snd_soc_dapm_input:
1739 case snd_soc_dapm_output:
1740 case snd_soc_dapm_micbias:
1741 case snd_soc_dapm_vmid:
1742 case snd_soc_dapm_pre:
1743 case snd_soc_dapm_post:
1744 case snd_soc_dapm_supply:
1745 case snd_soc_dapm_aif_in:
1746 case snd_soc_dapm_aif_out:
1747 list_add(&path->list, &dapm->card->paths);
1748 list_add(&path->list_sink, &wsink->sources);
1749 list_add(&path->list_source, &wsource->sinks);
1752 case snd_soc_dapm_mux:
1753 case snd_soc_dapm_virt_mux:
1754 case snd_soc_dapm_value_mux:
1755 ret = dapm_connect_mux(dapm, wsource, wsink, path, control,
1756 &wsink->kcontrol_news[0]);
1760 case snd_soc_dapm_switch:
1761 case snd_soc_dapm_mixer:
1762 case snd_soc_dapm_mixer_named_ctl:
1763 ret = dapm_connect_mixer(dapm, wsource, wsink, path, control);
1767 case snd_soc_dapm_hp:
1768 case snd_soc_dapm_mic:
1769 case snd_soc_dapm_line:
1770 case snd_soc_dapm_spk:
1771 list_add(&path->list, &dapm->card->paths);
1772 list_add(&path->list_sink, &wsink->sources);
1773 list_add(&path->list_source, &wsource->sinks);
1780 dev_warn(dapm->dev, "asoc: no dapm match for %s --> %s --> %s\n",
1781 source, control, sink);
1787 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1788 * @dapm: DAPM context
1789 * @route: audio routes
1790 * @num: number of routes
1792 * Connects 2 dapm widgets together via a named audio path. The sink is
1793 * the widget receiving the audio signal, whilst the source is the sender
1794 * of the audio signal.
1796 * Returns 0 for success else error. On error all resources can be freed
1797 * with a call to snd_soc_card_free().
1799 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
1800 const struct snd_soc_dapm_route *route, int num)
1804 for (i = 0; i < num; i++) {
1805 ret = snd_soc_dapm_add_route(dapm, route);
1807 dev_err(dapm->dev, "Failed to add route %s->%s\n",
1808 route->source, route->sink);
1816 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
1818 static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm,
1819 const struct snd_soc_dapm_route *route)
1821 struct snd_soc_dapm_widget *source = dapm_find_widget(dapm,
1824 struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm,
1827 struct snd_soc_dapm_path *path;
1831 dev_err(dapm->dev, "Unable to find source %s for weak route\n",
1837 dev_err(dapm->dev, "Unable to find sink %s for weak route\n",
1842 if (route->control || route->connected)
1843 dev_warn(dapm->dev, "Ignoring control for weak route %s->%s\n",
1844 route->source, route->sink);
1846 list_for_each_entry(path, &source->sinks, list_source) {
1847 if (path->sink == sink) {
1854 dev_err(dapm->dev, "No path found for weak route %s->%s\n",
1855 route->source, route->sink);
1857 dev_warn(dapm->dev, "%d paths found for weak route %s->%s\n",
1858 count, route->source, route->sink);
1864 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
1865 * @dapm: DAPM context
1866 * @route: audio routes
1867 * @num: number of routes
1869 * Mark existing routes matching those specified in the passed array
1870 * as being weak, meaning that they are ignored for the purpose of
1871 * power decisions. The main intended use case is for sidetone paths
1872 * which couple audio between other independent paths if they are both
1873 * active in order to make the combination work better at the user
1874 * level but which aren't intended to be "used".
1876 * Note that CODEC drivers should not use this as sidetone type paths
1877 * can frequently also be used as bypass paths.
1879 int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm,
1880 const struct snd_soc_dapm_route *route, int num)
1885 for (i = 0; i < num; i++) {
1886 err = snd_soc_dapm_weak_route(dapm, route);
1894 EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes);
1897 * snd_soc_dapm_new_widgets - add new dapm widgets
1898 * @dapm: DAPM context
1900 * Checks the codec for any new dapm widgets and creates them if found.
1902 * Returns 0 for success.
1904 int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context *dapm)
1906 struct snd_soc_dapm_widget *w;
1909 list_for_each_entry(w, &dapm->card->widgets, list)
1914 if (w->num_kcontrols) {
1915 w->kcontrols = kzalloc(w->num_kcontrols *
1916 sizeof(struct snd_kcontrol *),
1923 case snd_soc_dapm_switch:
1924 case snd_soc_dapm_mixer:
1925 case snd_soc_dapm_mixer_named_ctl:
1926 w->power_check = dapm_generic_check_power;
1929 case snd_soc_dapm_mux:
1930 case snd_soc_dapm_virt_mux:
1931 case snd_soc_dapm_value_mux:
1932 w->power_check = dapm_generic_check_power;
1935 case snd_soc_dapm_adc:
1936 case snd_soc_dapm_aif_out:
1937 w->power_check = dapm_adc_check_power;
1939 case snd_soc_dapm_dac:
1940 case snd_soc_dapm_aif_in:
1941 w->power_check = dapm_dac_check_power;
1943 case snd_soc_dapm_pga:
1944 case snd_soc_dapm_out_drv:
1945 w->power_check = dapm_generic_check_power;
1948 case snd_soc_dapm_input:
1949 case snd_soc_dapm_output:
1950 case snd_soc_dapm_micbias:
1951 case snd_soc_dapm_spk:
1952 case snd_soc_dapm_hp:
1953 case snd_soc_dapm_mic:
1954 case snd_soc_dapm_line:
1955 w->power_check = dapm_generic_check_power;
1957 case snd_soc_dapm_supply:
1958 w->power_check = dapm_supply_check_power;
1959 case snd_soc_dapm_vmid:
1960 case snd_soc_dapm_pre:
1961 case snd_soc_dapm_post:
1965 /* Read the initial power state from the device */
1967 val = snd_soc_read(w->codec, w->reg);
1968 val &= 1 << w->shift;
1978 dapm_debugfs_add_widget(w);
1981 dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
1984 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
1987 * snd_soc_dapm_get_volsw - dapm mixer get callback
1988 * @kcontrol: mixer control
1989 * @ucontrol: control element information
1991 * Callback to get the value of a dapm mixer control.
1993 * Returns 0 for success.
1995 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
1996 struct snd_ctl_elem_value *ucontrol)
1998 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
1999 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2000 struct soc_mixer_control *mc =
2001 (struct soc_mixer_control *)kcontrol->private_value;
2002 unsigned int reg = mc->reg;
2003 unsigned int shift = mc->shift;
2004 unsigned int rshift = mc->rshift;
2006 unsigned int invert = mc->invert;
2007 unsigned int mask = (1 << fls(max)) - 1;
2009 ucontrol->value.integer.value[0] =
2010 (snd_soc_read(widget->codec, reg) >> shift) & mask;
2011 if (shift != rshift)
2012 ucontrol->value.integer.value[1] =
2013 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
2015 ucontrol->value.integer.value[0] =
2016 max - ucontrol->value.integer.value[0];
2017 if (shift != rshift)
2018 ucontrol->value.integer.value[1] =
2019 max - ucontrol->value.integer.value[1];
2024 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
2027 * snd_soc_dapm_put_volsw - dapm mixer set callback
2028 * @kcontrol: mixer control
2029 * @ucontrol: control element information
2031 * Callback to set the value of a dapm mixer control.
2033 * Returns 0 for success.
2035 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
2036 struct snd_ctl_elem_value *ucontrol)
2038 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2039 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2040 struct snd_soc_codec *codec = widget->codec;
2041 struct soc_mixer_control *mc =
2042 (struct soc_mixer_control *)kcontrol->private_value;
2043 unsigned int reg = mc->reg;
2044 unsigned int shift = mc->shift;
2046 unsigned int mask = (1 << fls(max)) - 1;
2047 unsigned int invert = mc->invert;
2049 int connect, change;
2050 struct snd_soc_dapm_update update;
2053 val = (ucontrol->value.integer.value[0] & mask);
2057 mask = mask << shift;
2061 /* new connection */
2062 connect = invert ? 0 : 1;
2064 /* old connection must be powered down */
2065 connect = invert ? 1 : 0;
2067 mutex_lock(&codec->mutex);
2069 change = snd_soc_test_bits(widget->codec, reg, mask, val);
2071 for (wi = 0; wi < wlist->num_widgets; wi++) {
2072 widget = wlist->widgets[wi];
2074 widget->value = val;
2076 update.kcontrol = kcontrol;
2077 update.widget = widget;
2081 widget->dapm->update = &update;
2083 dapm_mixer_update_power(widget, kcontrol, connect);
2085 widget->dapm->update = NULL;
2089 mutex_unlock(&codec->mutex);
2092 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
2095 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
2096 * @kcontrol: mixer control
2097 * @ucontrol: control element information
2099 * Callback to get the value of a dapm enumerated double mixer control.
2101 * Returns 0 for success.
2103 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
2104 struct snd_ctl_elem_value *ucontrol)
2106 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2107 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2108 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2109 unsigned int val, bitmask;
2111 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2113 val = snd_soc_read(widget->codec, e->reg);
2114 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
2115 if (e->shift_l != e->shift_r)
2116 ucontrol->value.enumerated.item[1] =
2117 (val >> e->shift_r) & (bitmask - 1);
2121 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
2124 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
2125 * @kcontrol: mixer control
2126 * @ucontrol: control element information
2128 * Callback to set the value of a dapm enumerated double mixer control.
2130 * Returns 0 for success.
2132 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
2133 struct snd_ctl_elem_value *ucontrol)
2135 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2136 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2137 struct snd_soc_codec *codec = widget->codec;
2138 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2139 unsigned int val, mux, change;
2140 unsigned int mask, bitmask;
2141 struct snd_soc_dapm_update update;
2144 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2146 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2148 mux = ucontrol->value.enumerated.item[0];
2149 val = mux << e->shift_l;
2150 mask = (bitmask - 1) << e->shift_l;
2151 if (e->shift_l != e->shift_r) {
2152 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2154 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2155 mask |= (bitmask - 1) << e->shift_r;
2158 mutex_lock(&codec->mutex);
2160 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2162 for (wi = 0; wi < wlist->num_widgets; wi++) {
2163 widget = wlist->widgets[wi];
2165 widget->value = val;
2167 update.kcontrol = kcontrol;
2168 update.widget = widget;
2169 update.reg = e->reg;
2172 widget->dapm->update = &update;
2174 dapm_mux_update_power(widget, kcontrol, change, mux, e);
2176 widget->dapm->update = NULL;
2180 mutex_unlock(&codec->mutex);
2183 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
2186 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
2187 * @kcontrol: mixer control
2188 * @ucontrol: control element information
2190 * Returns 0 for success.
2192 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
2193 struct snd_ctl_elem_value *ucontrol)
2195 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2196 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2198 ucontrol->value.enumerated.item[0] = widget->value;
2202 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt);
2205 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
2206 * @kcontrol: mixer control
2207 * @ucontrol: control element information
2209 * Returns 0 for success.
2211 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
2212 struct snd_ctl_elem_value *ucontrol)
2214 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2215 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2216 struct snd_soc_codec *codec = widget->codec;
2217 struct soc_enum *e =
2218 (struct soc_enum *)kcontrol->private_value;
2223 if (ucontrol->value.enumerated.item[0] >= e->max)
2226 mutex_lock(&codec->mutex);
2228 change = widget->value != ucontrol->value.enumerated.item[0];
2230 for (wi = 0; wi < wlist->num_widgets; wi++) {
2231 widget = wlist->widgets[wi];
2233 widget->value = ucontrol->value.enumerated.item[0];
2235 dapm_mux_update_power(widget, kcontrol, change,
2240 mutex_unlock(&codec->mutex);
2243 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt);
2246 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
2248 * @kcontrol: mixer control
2249 * @ucontrol: control element information
2251 * Callback to get the value of a dapm semi enumerated double mixer control.
2253 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2254 * used for handling bitfield coded enumeration for example.
2256 * Returns 0 for success.
2258 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
2259 struct snd_ctl_elem_value *ucontrol)
2261 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2262 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2263 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2264 unsigned int reg_val, val, mux;
2266 reg_val = snd_soc_read(widget->codec, e->reg);
2267 val = (reg_val >> e->shift_l) & e->mask;
2268 for (mux = 0; mux < e->max; mux++) {
2269 if (val == e->values[mux])
2272 ucontrol->value.enumerated.item[0] = mux;
2273 if (e->shift_l != e->shift_r) {
2274 val = (reg_val >> e->shift_r) & e->mask;
2275 for (mux = 0; mux < e->max; mux++) {
2276 if (val == e->values[mux])
2279 ucontrol->value.enumerated.item[1] = mux;
2284 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
2287 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
2289 * @kcontrol: mixer control
2290 * @ucontrol: control element information
2292 * Callback to set the value of a dapm semi enumerated double mixer control.
2294 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2295 * used for handling bitfield coded enumeration for example.
2297 * Returns 0 for success.
2299 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
2300 struct snd_ctl_elem_value *ucontrol)
2302 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2303 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2304 struct snd_soc_codec *codec = widget->codec;
2305 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2306 unsigned int val, mux, change;
2308 struct snd_soc_dapm_update update;
2311 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2313 mux = ucontrol->value.enumerated.item[0];
2314 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2315 mask = e->mask << e->shift_l;
2316 if (e->shift_l != e->shift_r) {
2317 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2319 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2320 mask |= e->mask << e->shift_r;
2323 mutex_lock(&codec->mutex);
2325 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2327 for (wi = 0; wi < wlist->num_widgets; wi++) {
2328 widget = wlist->widgets[wi];
2330 widget->value = val;
2332 update.kcontrol = kcontrol;
2333 update.widget = widget;
2334 update.reg = e->reg;
2337 widget->dapm->update = &update;
2339 dapm_mux_update_power(widget, kcontrol, change, mux, e);
2341 widget->dapm->update = NULL;
2345 mutex_unlock(&codec->mutex);
2348 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
2351 * snd_soc_dapm_info_pin_switch - Info for a pin switch
2353 * @kcontrol: mixer control
2354 * @uinfo: control element information
2356 * Callback to provide information about a pin switch control.
2358 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
2359 struct snd_ctl_elem_info *uinfo)
2361 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2363 uinfo->value.integer.min = 0;
2364 uinfo->value.integer.max = 1;
2368 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
2371 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
2373 * @kcontrol: mixer control
2376 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
2377 struct snd_ctl_elem_value *ucontrol)
2379 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2380 const char *pin = (const char *)kcontrol->private_value;
2382 mutex_lock(&codec->mutex);
2384 ucontrol->value.integer.value[0] =
2385 snd_soc_dapm_get_pin_status(&codec->dapm, pin);
2387 mutex_unlock(&codec->mutex);
2391 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
2394 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
2396 * @kcontrol: mixer control
2399 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
2400 struct snd_ctl_elem_value *ucontrol)
2402 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2403 const char *pin = (const char *)kcontrol->private_value;
2405 mutex_lock(&codec->mutex);
2407 if (ucontrol->value.integer.value[0])
2408 snd_soc_dapm_enable_pin(&codec->dapm, pin);
2410 snd_soc_dapm_disable_pin(&codec->dapm, pin);
2412 snd_soc_dapm_sync(&codec->dapm);
2414 mutex_unlock(&codec->mutex);
2418 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
2421 * snd_soc_dapm_new_control - create new dapm control
2422 * @dapm: DAPM context
2423 * @widget: widget template
2425 * Creates a new dapm control based upon the template.
2427 * Returns 0 for success else error.
2429 int snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
2430 const struct snd_soc_dapm_widget *widget)
2432 struct snd_soc_dapm_widget *w;
2435 if ((w = dapm_cnew_widget(widget)) == NULL)
2438 name_len = strlen(widget->name) + 1;
2439 if (dapm->codec && dapm->codec->name_prefix)
2440 name_len += 1 + strlen(dapm->codec->name_prefix);
2441 w->name = kmalloc(name_len, GFP_KERNEL);
2442 if (w->name == NULL) {
2446 if (dapm->codec && dapm->codec->name_prefix)
2447 snprintf(w->name, name_len, "%s %s",
2448 dapm->codec->name_prefix, widget->name);
2450 snprintf(w->name, name_len, "%s", widget->name);
2454 w->codec = dapm->codec;
2455 INIT_LIST_HEAD(&w->sources);
2456 INIT_LIST_HEAD(&w->sinks);
2457 INIT_LIST_HEAD(&w->list);
2458 list_add(&w->list, &dapm->card->widgets);
2460 /* machine layer set ups unconnected pins and insertions */
2464 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
2467 * snd_soc_dapm_new_controls - create new dapm controls
2468 * @dapm: DAPM context
2469 * @widget: widget array
2470 * @num: number of widgets
2472 * Creates new DAPM controls based upon the templates.
2474 * Returns 0 for success else error.
2476 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
2477 const struct snd_soc_dapm_widget *widget,
2482 for (i = 0; i < num; i++) {
2483 ret = snd_soc_dapm_new_control(dapm, widget);
2486 "ASoC: Failed to create DAPM control %s: %d\n",
2494 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
2496 static void soc_dapm_stream_event(struct snd_soc_dapm_context *dapm,
2497 const char *stream, int event)
2499 struct snd_soc_dapm_widget *w;
2501 list_for_each_entry(w, &dapm->card->widgets, list)
2503 if (!w->sname || w->dapm != dapm)
2505 dev_dbg(w->dapm->dev, "widget %s\n %s stream %s event %d\n",
2506 w->name, w->sname, stream, event);
2507 if (strstr(w->sname, stream)) {
2509 case SND_SOC_DAPM_STREAM_START:
2512 case SND_SOC_DAPM_STREAM_STOP:
2515 case SND_SOC_DAPM_STREAM_SUSPEND:
2516 case SND_SOC_DAPM_STREAM_RESUME:
2517 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
2518 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
2524 dapm_power_widgets(dapm, event);
2528 * snd_soc_dapm_stream_event - send a stream event to the dapm core
2529 * @rtd: PCM runtime data
2530 * @stream: stream name
2531 * @event: stream event
2533 * Sends a stream event to the dapm core. The core then makes any
2534 * necessary widget power changes.
2536 * Returns 0 for success else error.
2538 int snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd,
2539 const char *stream, int event)
2541 struct snd_soc_codec *codec = rtd->codec;
2546 mutex_lock(&codec->mutex);
2547 soc_dapm_stream_event(&codec->dapm, stream, event);
2548 mutex_unlock(&codec->mutex);
2553 * snd_soc_dapm_enable_pin - enable pin.
2554 * @dapm: DAPM context
2557 * Enables input/output pin and its parents or children widgets iff there is
2558 * a valid audio route and active audio stream.
2559 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2560 * do any widget power switching.
2562 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
2564 return snd_soc_dapm_set_pin(dapm, pin, 1);
2566 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
2569 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
2570 * @dapm: DAPM context
2573 * Enables input/output pin regardless of any other state. This is
2574 * intended for use with microphone bias supplies used in microphone
2577 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2578 * do any widget power switching.
2580 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
2583 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2586 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
2590 dev_dbg(w->dapm->dev, "dapm: force enable pin %s\n", pin);
2596 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
2599 * snd_soc_dapm_disable_pin - disable pin.
2600 * @dapm: DAPM context
2603 * Disables input/output pin and its parents or children widgets.
2604 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2605 * do any widget power switching.
2607 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
2610 return snd_soc_dapm_set_pin(dapm, pin, 0);
2612 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
2615 * snd_soc_dapm_nc_pin - permanently disable pin.
2616 * @dapm: DAPM context
2619 * Marks the specified pin as being not connected, disabling it along
2620 * any parent or child widgets. At present this is identical to
2621 * snd_soc_dapm_disable_pin() but in future it will be extended to do
2622 * additional things such as disabling controls which only affect
2623 * paths through the pin.
2625 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2626 * do any widget power switching.
2628 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
2630 return snd_soc_dapm_set_pin(dapm, pin, 0);
2632 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
2635 * snd_soc_dapm_get_pin_status - get audio pin status
2636 * @dapm: DAPM context
2637 * @pin: audio signal pin endpoint (or start point)
2639 * Get audio pin status - connected or disconnected.
2641 * Returns 1 for connected otherwise 0.
2643 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
2646 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2649 return w->connected;
2653 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
2656 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
2657 * @dapm: DAPM context
2658 * @pin: audio signal pin endpoint (or start point)
2660 * Mark the given endpoint or pin as ignoring suspend. When the
2661 * system is disabled a path between two endpoints flagged as ignoring
2662 * suspend will not be disabled. The path must already be enabled via
2663 * normal means at suspend time, it will not be turned on if it was not
2666 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
2669 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
2672 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
2676 w->ignore_suspend = 1;
2680 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
2683 * snd_soc_dapm_free - free dapm resources
2686 * Free all dapm widgets and resources.
2688 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
2690 snd_soc_dapm_sys_remove(dapm->dev);
2691 dapm_debugfs_cleanup(dapm);
2692 dapm_free_widgets(dapm);
2693 list_del(&dapm->list);
2695 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
2697 static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context *dapm)
2699 struct snd_soc_dapm_widget *w;
2700 LIST_HEAD(down_list);
2703 list_for_each_entry(w, &dapm->card->widgets, list) {
2704 if (w->dapm != dapm)
2707 dapm_seq_insert(w, &down_list, false);
2713 /* If there were no widgets to power down we're already in
2717 snd_soc_dapm_set_bias_level(dapm, SND_SOC_BIAS_PREPARE);
2718 dapm_seq_run(dapm, &down_list, 0, false);
2719 snd_soc_dapm_set_bias_level(dapm, SND_SOC_BIAS_STANDBY);
2724 * snd_soc_dapm_shutdown - callback for system shutdown
2726 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
2728 struct snd_soc_codec *codec;
2730 list_for_each_entry(codec, &card->codec_dev_list, list) {
2731 soc_dapm_shutdown_codec(&codec->dapm);
2732 snd_soc_dapm_set_bias_level(&codec->dapm, SND_SOC_BIAS_OFF);
2736 /* Module information */
2737 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2738 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
2739 MODULE_LICENSE("GPL");