2 * soc-dapm.c -- ALSA SoC Dynamic Audio Power Management
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
13 * o Changes power status of internal codec blocks depending on the
14 * dynamic configuration of codec internal audio paths and active
16 * o Platform power domain - can support external components i.e. amps and
17 * mic/meadphone insertion events.
18 * o Automatic Mic Bias support
19 * o Jack insertion power event initiation - e.g. hp insertion will enable
21 * o Delayed powerdown of audio susbsystem to reduce pops between a quick
25 * o DAPM power change sequencing - allow for configurable per
27 * o Support for analogue bias optimisation.
28 * o Support for reduced codec oversampling rates.
29 * o Support for reduced codec bias currents.
32 #include <linux/module.h>
33 #include <linux/moduleparam.h>
34 #include <linux/init.h>
35 #include <linux/async.h>
36 #include <linux/delay.h>
38 #include <linux/bitops.h>
39 #include <linux/platform_device.h>
40 #include <linux/jiffies.h>
41 #include <linux/debugfs.h>
42 #include <linux/slab.h>
43 #include <sound/core.h>
44 #include <sound/pcm.h>
45 #include <sound/pcm_params.h>
46 #include <sound/soc.h>
47 #include <sound/initval.h>
49 #include <trace/events/asoc.h>
51 #define DAPM_UPDATE_STAT(widget, val) widget->dapm->card->dapm_stats.val++;
53 /* dapm power sequences - make this per codec in the future */
54 static int dapm_up_seq[] = {
55 [snd_soc_dapm_pre] = 0,
56 [snd_soc_dapm_supply] = 1,
57 [snd_soc_dapm_micbias] = 2,
58 [snd_soc_dapm_aif_in] = 3,
59 [snd_soc_dapm_aif_out] = 3,
60 [snd_soc_dapm_mic] = 4,
61 [snd_soc_dapm_mux] = 5,
62 [snd_soc_dapm_virt_mux] = 5,
63 [snd_soc_dapm_value_mux] = 5,
64 [snd_soc_dapm_dac] = 6,
65 [snd_soc_dapm_mixer] = 7,
66 [snd_soc_dapm_mixer_named_ctl] = 7,
67 [snd_soc_dapm_pga] = 8,
68 [snd_soc_dapm_adc] = 9,
69 [snd_soc_dapm_out_drv] = 10,
70 [snd_soc_dapm_hp] = 10,
71 [snd_soc_dapm_spk] = 10,
72 [snd_soc_dapm_post] = 11,
75 static int dapm_down_seq[] = {
76 [snd_soc_dapm_pre] = 0,
77 [snd_soc_dapm_adc] = 1,
78 [snd_soc_dapm_hp] = 2,
79 [snd_soc_dapm_spk] = 2,
80 [snd_soc_dapm_out_drv] = 2,
81 [snd_soc_dapm_pga] = 4,
82 [snd_soc_dapm_mixer_named_ctl] = 5,
83 [snd_soc_dapm_mixer] = 5,
84 [snd_soc_dapm_dac] = 6,
85 [snd_soc_dapm_mic] = 7,
86 [snd_soc_dapm_micbias] = 8,
87 [snd_soc_dapm_mux] = 9,
88 [snd_soc_dapm_virt_mux] = 9,
89 [snd_soc_dapm_value_mux] = 9,
90 [snd_soc_dapm_aif_in] = 10,
91 [snd_soc_dapm_aif_out] = 10,
92 [snd_soc_dapm_supply] = 11,
93 [snd_soc_dapm_post] = 12,
96 static void pop_wait(u32 pop_time)
99 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
102 static void pop_dbg(struct device *dev, u32 pop_time, const char *fmt, ...)
110 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
115 vsnprintf(buf, PAGE_SIZE, fmt, args);
116 dev_info(dev, "%s", buf);
122 /* create a new dapm widget */
123 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
124 const struct snd_soc_dapm_widget *_widget)
126 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
129 /* get snd_card from DAPM context */
130 static inline struct snd_card *dapm_get_snd_card(
131 struct snd_soc_dapm_context *dapm)
134 return dapm->codec->card->snd_card;
135 else if (dapm->platform)
136 return dapm->platform->card->snd_card;
144 /* get soc_card from DAPM context */
145 static inline struct snd_soc_card *dapm_get_soc_card(
146 struct snd_soc_dapm_context *dapm)
149 return dapm->codec->card;
150 else if (dapm->platform)
151 return dapm->platform->card;
159 static int soc_widget_read(struct snd_soc_dapm_widget *w, int reg)
162 return snd_soc_read(w->codec, reg);
163 else if (w->platform)
164 return snd_soc_platform_read(w->platform, reg);
166 dev_err(w->dapm->dev, "no valid widget read method\n");
170 static int soc_widget_write(struct snd_soc_dapm_widget *w, int reg, int val)
173 return snd_soc_write(w->codec, reg, val);
174 else if (w->platform)
175 return snd_soc_platform_write(w->platform, reg, val);
177 dev_err(w->dapm->dev, "no valid widget write method\n");
181 static int soc_widget_update_bits(struct snd_soc_dapm_widget *w,
182 unsigned short reg, unsigned int mask, unsigned int value)
185 unsigned int old, new;
188 ret = soc_widget_read(w, reg);
193 new = (old & ~mask) | (value & mask);
196 ret = soc_widget_write(w, reg, new);
205 * snd_soc_dapm_set_bias_level - set the bias level for the system
206 * @dapm: DAPM context
207 * @level: level to configure
209 * Configure the bias (power) levels for the SoC audio device.
211 * Returns 0 for success else error.
213 static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm,
214 enum snd_soc_bias_level level)
216 struct snd_soc_card *card = dapm->card;
219 trace_snd_soc_bias_level_start(card, level);
221 if (card && card->set_bias_level)
222 ret = card->set_bias_level(card, dapm, level);
227 if (dapm->codec->driver->set_bias_level)
228 ret = dapm->codec->driver->set_bias_level(dapm->codec,
231 dapm->bias_level = level;
236 if (card && card->set_bias_level_post)
237 ret = card->set_bias_level_post(card, dapm, level);
239 trace_snd_soc_bias_level_done(card, level);
244 /* set up initial codec paths */
245 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
246 struct snd_soc_dapm_path *p, int i)
249 case snd_soc_dapm_switch:
250 case snd_soc_dapm_mixer:
251 case snd_soc_dapm_mixer_named_ctl: {
253 struct soc_mixer_control *mc = (struct soc_mixer_control *)
254 w->kcontrol_news[i].private_value;
255 unsigned int reg = mc->reg;
256 unsigned int shift = mc->shift;
258 unsigned int mask = (1 << fls(max)) - 1;
259 unsigned int invert = mc->invert;
261 val = soc_widget_read(w, reg);
262 val = (val >> shift) & mask;
264 if ((invert && !val) || (!invert && val))
270 case snd_soc_dapm_mux: {
271 struct soc_enum *e = (struct soc_enum *)
272 w->kcontrol_news[i].private_value;
273 int val, item, bitmask;
275 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
277 val = soc_widget_read(w, e->reg);
278 item = (val >> e->shift_l) & (bitmask - 1);
281 for (i = 0; i < e->max; i++) {
282 if (!(strcmp(p->name, e->texts[i])) && item == i)
287 case snd_soc_dapm_virt_mux: {
288 struct soc_enum *e = (struct soc_enum *)
289 w->kcontrol_news[i].private_value;
292 /* since a virtual mux has no backing registers to
293 * decide which path to connect, it will try to match
294 * with the first enumeration. This is to ensure
295 * that the default mux choice (the first) will be
296 * correctly powered up during initialization.
298 if (!strcmp(p->name, e->texts[0]))
302 case snd_soc_dapm_value_mux: {
303 struct soc_enum *e = (struct soc_enum *)
304 w->kcontrol_news[i].private_value;
307 val = soc_widget_read(w, e->reg);
308 val = (val >> e->shift_l) & e->mask;
309 for (item = 0; item < e->max; item++) {
310 if (val == e->values[item])
315 for (i = 0; i < e->max; i++) {
316 if (!(strcmp(p->name, e->texts[i])) && item == i)
321 /* does not effect routing - always connected */
322 case snd_soc_dapm_pga:
323 case snd_soc_dapm_out_drv:
324 case snd_soc_dapm_output:
325 case snd_soc_dapm_adc:
326 case snd_soc_dapm_input:
327 case snd_soc_dapm_dac:
328 case snd_soc_dapm_micbias:
329 case snd_soc_dapm_vmid:
330 case snd_soc_dapm_supply:
331 case snd_soc_dapm_aif_in:
332 case snd_soc_dapm_aif_out:
335 /* does effect routing - dynamically connected */
336 case snd_soc_dapm_hp:
337 case snd_soc_dapm_mic:
338 case snd_soc_dapm_spk:
339 case snd_soc_dapm_line:
340 case snd_soc_dapm_pre:
341 case snd_soc_dapm_post:
347 /* connect mux widget to its interconnecting audio paths */
348 static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
349 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
350 struct snd_soc_dapm_path *path, const char *control_name,
351 const struct snd_kcontrol_new *kcontrol)
353 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
356 for (i = 0; i < e->max; i++) {
357 if (!(strcmp(control_name, e->texts[i]))) {
358 list_add(&path->list, &dapm->card->paths);
359 list_add(&path->list_sink, &dest->sources);
360 list_add(&path->list_source, &src->sinks);
361 path->name = (char*)e->texts[i];
362 dapm_set_path_status(dest, path, 0);
370 /* connect mixer widget to its interconnecting audio paths */
371 static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
372 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
373 struct snd_soc_dapm_path *path, const char *control_name)
377 /* search for mixer kcontrol */
378 for (i = 0; i < dest->num_kcontrols; i++) {
379 if (!strcmp(control_name, dest->kcontrol_news[i].name)) {
380 list_add(&path->list, &dapm->card->paths);
381 list_add(&path->list_sink, &dest->sources);
382 list_add(&path->list_source, &src->sinks);
383 path->name = dest->kcontrol_news[i].name;
384 dapm_set_path_status(dest, path, i);
391 static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm,
392 struct snd_soc_dapm_widget *kcontrolw,
393 const struct snd_kcontrol_new *kcontrol_new,
394 struct snd_kcontrol **kcontrol)
396 struct snd_soc_dapm_widget *w;
401 list_for_each_entry(w, &dapm->card->widgets, list) {
402 if (w == kcontrolw || w->dapm != kcontrolw->dapm)
404 for (i = 0; i < w->num_kcontrols; i++) {
405 if (&w->kcontrol_news[i] == kcontrol_new) {
407 *kcontrol = w->kcontrols[i];
416 /* create new dapm mixer control */
417 static int dapm_new_mixer(struct snd_soc_dapm_widget *w)
419 struct snd_soc_dapm_context *dapm = w->dapm;
421 size_t name_len, prefix_len;
422 struct snd_soc_dapm_path *path;
423 struct snd_card *card = dapm->card->snd_card;
425 struct snd_soc_dapm_widget_list *wlist;
429 prefix = dapm->codec->name_prefix;
434 prefix_len = strlen(prefix) + 1;
439 for (i = 0; i < w->num_kcontrols; i++) {
442 list_for_each_entry(path, &w->sources, list_sink) {
444 /* mixer/mux paths name must match control name */
445 if (path->name != (char *)w->kcontrol_news[i].name)
448 if (w->kcontrols[i]) {
449 path->kcontrol = w->kcontrols[i];
453 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
454 sizeof(struct snd_soc_dapm_widget *),
455 wlist = kzalloc(wlistsize, GFP_KERNEL);
458 "asoc: can't allocate widget list for %s\n",
462 wlist->num_widgets = 1;
463 wlist->widgets[0] = w;
465 /* add dapm control with long name.
466 * for dapm_mixer this is the concatenation of the
467 * mixer and kcontrol name.
468 * for dapm_mixer_named_ctl this is simply the
471 name_len = strlen(w->kcontrol_news[i].name) + 1;
472 if (w->id != snd_soc_dapm_mixer_named_ctl)
473 name_len += 1 + strlen(w->name);
475 path->long_name = kmalloc(name_len, GFP_KERNEL);
477 if (path->long_name == NULL) {
484 /* The control will get a prefix from
485 * the control creation process but
486 * we're also using the same prefix
487 * for widgets so cut the prefix off
488 * the front of the widget name.
490 snprintf(path->long_name, name_len, "%s %s",
491 w->name + prefix_len,
492 w->kcontrol_news[i].name);
494 case snd_soc_dapm_mixer_named_ctl:
495 snprintf(path->long_name, name_len, "%s",
496 w->kcontrol_news[i].name);
500 path->long_name[name_len - 1] = '\0';
502 path->kcontrol = snd_soc_cnew(&w->kcontrol_news[i],
503 wlist, path->long_name,
505 ret = snd_ctl_add(card, path->kcontrol);
508 "asoc: failed to add dapm kcontrol %s: %d\n",
509 path->long_name, ret);
511 kfree(path->long_name);
512 path->long_name = NULL;
515 w->kcontrols[i] = path->kcontrol;
521 /* create new dapm mux control */
522 static int dapm_new_mux(struct snd_soc_dapm_widget *w)
524 struct snd_soc_dapm_context *dapm = w->dapm;
525 struct snd_soc_dapm_path *path = NULL;
526 struct snd_kcontrol *kcontrol;
527 struct snd_card *card = dapm->card->snd_card;
531 struct snd_soc_dapm_widget_list *wlist;
532 int shared, wlistentries;
536 if (w->num_kcontrols != 1) {
538 "asoc: mux %s has incorrect number of controls\n",
543 shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[0],
546 wlist = kcontrol->private_data;
547 wlistentries = wlist->num_widgets + 1;
552 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
553 wlistentries * sizeof(struct snd_soc_dapm_widget *),
554 wlist = krealloc(wlist, wlistsize, GFP_KERNEL);
557 "asoc: can't allocate widget list for %s\n", w->name);
560 wlist->num_widgets = wlistentries;
561 wlist->widgets[wlistentries - 1] = w;
565 prefix = dapm->codec->name_prefix;
570 name = w->kcontrol_news[0].name;
575 prefix_len = strlen(prefix) + 1;
581 * The control will get a prefix from the control creation
582 * process but we're also using the same prefix for widgets so
583 * cut the prefix off the front of the widget name.
585 kcontrol = snd_soc_cnew(&w->kcontrol_news[0], wlist,
586 name + prefix_len, prefix);
587 ret = snd_ctl_add(card, kcontrol);
589 dev_err(dapm->dev, "failed to add kcontrol %s: %d\n",
596 kcontrol->private_data = wlist;
598 w->kcontrols[0] = kcontrol;
600 list_for_each_entry(path, &w->sources, list_sink)
601 path->kcontrol = kcontrol;
606 /* create new dapm volume control */
607 static int dapm_new_pga(struct snd_soc_dapm_widget *w)
609 if (w->num_kcontrols)
610 dev_err(w->dapm->dev,
611 "asoc: PGA controls not supported: '%s'\n", w->name);
616 /* reset 'walked' bit for each dapm path */
617 static inline void dapm_clear_walk(struct snd_soc_dapm_context *dapm)
619 struct snd_soc_dapm_path *p;
621 list_for_each_entry(p, &dapm->card->paths, list)
625 /* We implement power down on suspend by checking the power state of
626 * the ALSA card - when we are suspending the ALSA state for the card
629 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
631 int level = snd_power_get_state(widget->dapm->card->snd_card);
634 case SNDRV_CTL_POWER_D3hot:
635 case SNDRV_CTL_POWER_D3cold:
636 if (widget->ignore_suspend)
637 dev_dbg(widget->dapm->dev, "%s ignoring suspend\n",
639 return widget->ignore_suspend;
646 * Recursively check for a completed path to an active or physically connected
647 * output widget. Returns number of complete paths.
649 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
651 struct snd_soc_dapm_path *path;
654 DAPM_UPDATE_STAT(widget, path_checks);
656 if (widget->id == snd_soc_dapm_supply)
659 switch (widget->id) {
660 case snd_soc_dapm_adc:
661 case snd_soc_dapm_aif_out:
663 return snd_soc_dapm_suspend_check(widget);
668 if (widget->connected) {
669 /* connected pin ? */
670 if (widget->id == snd_soc_dapm_output && !widget->ext)
671 return snd_soc_dapm_suspend_check(widget);
673 /* connected jack or spk ? */
674 if (widget->id == snd_soc_dapm_hp || widget->id == snd_soc_dapm_spk ||
675 (widget->id == snd_soc_dapm_line && !list_empty(&widget->sources)))
676 return snd_soc_dapm_suspend_check(widget);
679 list_for_each_entry(path, &widget->sinks, list_source) {
680 DAPM_UPDATE_STAT(widget, neighbour_checks);
688 if (path->sink && path->connect) {
690 con += is_connected_output_ep(path->sink);
698 * Recursively check for a completed path to an active or physically connected
699 * input widget. Returns number of complete paths.
701 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
703 struct snd_soc_dapm_path *path;
706 DAPM_UPDATE_STAT(widget, path_checks);
708 if (widget->id == snd_soc_dapm_supply)
711 /* active stream ? */
712 switch (widget->id) {
713 case snd_soc_dapm_dac:
714 case snd_soc_dapm_aif_in:
716 return snd_soc_dapm_suspend_check(widget);
721 if (widget->connected) {
722 /* connected pin ? */
723 if (widget->id == snd_soc_dapm_input && !widget->ext)
724 return snd_soc_dapm_suspend_check(widget);
726 /* connected VMID/Bias for lower pops */
727 if (widget->id == snd_soc_dapm_vmid)
728 return snd_soc_dapm_suspend_check(widget);
730 /* connected jack ? */
731 if (widget->id == snd_soc_dapm_mic ||
732 (widget->id == snd_soc_dapm_line && !list_empty(&widget->sinks)))
733 return snd_soc_dapm_suspend_check(widget);
736 list_for_each_entry(path, &widget->sources, list_sink) {
737 DAPM_UPDATE_STAT(widget, neighbour_checks);
745 if (path->source && path->connect) {
747 con += is_connected_input_ep(path->source);
755 * Handler for generic register modifier widget.
757 int dapm_reg_event(struct snd_soc_dapm_widget *w,
758 struct snd_kcontrol *kcontrol, int event)
762 if (SND_SOC_DAPM_EVENT_ON(event))
767 soc_widget_update_bits(w, -(w->reg + 1),
768 w->mask << w->shift, val << w->shift);
772 EXPORT_SYMBOL_GPL(dapm_reg_event);
774 /* Generic check to see if a widget should be powered.
776 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
780 DAPM_UPDATE_STAT(w, power_checks);
782 in = is_connected_input_ep(w);
783 dapm_clear_walk(w->dapm);
784 out = is_connected_output_ep(w);
785 dapm_clear_walk(w->dapm);
786 return out != 0 && in != 0;
789 /* Check to see if an ADC has power */
790 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
794 DAPM_UPDATE_STAT(w, power_checks);
797 in = is_connected_input_ep(w);
798 dapm_clear_walk(w->dapm);
801 return dapm_generic_check_power(w);
805 /* Check to see if a DAC has power */
806 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
810 DAPM_UPDATE_STAT(w, power_checks);
813 out = is_connected_output_ep(w);
814 dapm_clear_walk(w->dapm);
817 return dapm_generic_check_power(w);
821 /* Check to see if a power supply is needed */
822 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
824 struct snd_soc_dapm_path *path;
827 DAPM_UPDATE_STAT(w, power_checks);
829 /* Check if one of our outputs is connected */
830 list_for_each_entry(path, &w->sinks, list_source) {
831 DAPM_UPDATE_STAT(w, neighbour_checks);
836 if (path->connected &&
837 !path->connected(path->source, path->sink))
843 if (path->sink->force) {
848 if (path->sink->power_check &&
849 path->sink->power_check(path->sink)) {
855 dapm_clear_walk(w->dapm);
860 static int dapm_always_on_check_power(struct snd_soc_dapm_widget *w)
865 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
866 struct snd_soc_dapm_widget *b,
874 sort = dapm_down_seq;
876 if (sort[a->id] != sort[b->id])
877 return sort[a->id] - sort[b->id];
878 if (a->subseq != b->subseq) {
880 return a->subseq - b->subseq;
882 return b->subseq - a->subseq;
884 if (a->reg != b->reg)
885 return a->reg - b->reg;
886 if (a->dapm != b->dapm)
887 return (unsigned long)a->dapm - (unsigned long)b->dapm;
892 /* Insert a widget in order into a DAPM power sequence. */
893 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
894 struct list_head *list,
897 struct snd_soc_dapm_widget *w;
899 list_for_each_entry(w, list, power_list)
900 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
901 list_add_tail(&new_widget->power_list, &w->power_list);
905 list_add_tail(&new_widget->power_list, list);
908 static void dapm_seq_check_event(struct snd_soc_dapm_context *dapm,
909 struct snd_soc_dapm_widget *w, int event)
911 struct snd_soc_card *card = dapm->card;
916 case SND_SOC_DAPM_PRE_PMU:
920 case SND_SOC_DAPM_POST_PMU:
921 ev_name = "POST_PMU";
924 case SND_SOC_DAPM_PRE_PMD:
928 case SND_SOC_DAPM_POST_PMD:
929 ev_name = "POST_PMD";
937 if (w->power != power)
940 if (w->event && (w->event_flags & event)) {
941 pop_dbg(dapm->dev, card->pop_time, "pop test : %s %s\n",
943 trace_snd_soc_dapm_widget_event_start(w, event);
944 ret = w->event(w, NULL, event);
945 trace_snd_soc_dapm_widget_event_done(w, event);
947 pr_err("%s: %s event failed: %d\n",
948 ev_name, w->name, ret);
952 /* Apply the coalesced changes from a DAPM sequence */
953 static void dapm_seq_run_coalesced(struct snd_soc_dapm_context *dapm,
954 struct list_head *pending)
956 struct snd_soc_card *card = dapm->card;
957 struct snd_soc_dapm_widget *w;
959 unsigned int value = 0;
960 unsigned int mask = 0;
961 unsigned int cur_mask;
963 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
966 list_for_each_entry(w, pending, power_list) {
967 cur_mask = 1 << w->shift;
968 BUG_ON(reg != w->reg);
979 pop_dbg(dapm->dev, card->pop_time,
980 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
981 w->name, reg, value, mask);
983 /* Check for events */
984 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMU);
985 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMD);
989 /* Any widget will do, they should all be updating the
992 w = list_first_entry(pending, struct snd_soc_dapm_widget,
995 pop_dbg(dapm->dev, card->pop_time,
996 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
997 value, mask, reg, card->pop_time);
998 pop_wait(card->pop_time);
999 soc_widget_update_bits(w, reg, mask, value);
1002 list_for_each_entry(w, pending, power_list) {
1003 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMU);
1004 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMD);
1008 /* Apply a DAPM power sequence.
1010 * We walk over a pre-sorted list of widgets to apply power to. In
1011 * order to minimise the number of writes to the device required
1012 * multiple widgets will be updated in a single write where possible.
1013 * Currently anything that requires more than a single write is not
1016 static void dapm_seq_run(struct snd_soc_dapm_context *dapm,
1017 struct list_head *list, int event, bool power_up)
1019 struct snd_soc_dapm_widget *w, *n;
1022 int cur_subseq = -1;
1023 int cur_reg = SND_SOC_NOPM;
1024 struct snd_soc_dapm_context *cur_dapm = NULL;
1031 sort = dapm_down_seq;
1033 list_for_each_entry_safe(w, n, list, power_list) {
1036 /* Do we need to apply any queued changes? */
1037 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
1038 w->dapm != cur_dapm || w->subseq != cur_subseq) {
1039 if (!list_empty(&pending))
1040 dapm_seq_run_coalesced(cur_dapm, &pending);
1042 if (cur_dapm && cur_dapm->seq_notifier) {
1043 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1044 if (sort[i] == cur_sort)
1045 cur_dapm->seq_notifier(cur_dapm,
1050 INIT_LIST_HEAD(&pending);
1052 cur_subseq = INT_MIN;
1053 cur_reg = SND_SOC_NOPM;
1058 case snd_soc_dapm_pre:
1060 list_for_each_entry_safe_continue(w, n, list,
1063 if (event == SND_SOC_DAPM_STREAM_START)
1065 NULL, SND_SOC_DAPM_PRE_PMU);
1066 else if (event == SND_SOC_DAPM_STREAM_STOP)
1068 NULL, SND_SOC_DAPM_PRE_PMD);
1071 case snd_soc_dapm_post:
1073 list_for_each_entry_safe_continue(w, n, list,
1076 if (event == SND_SOC_DAPM_STREAM_START)
1078 NULL, SND_SOC_DAPM_POST_PMU);
1079 else if (event == SND_SOC_DAPM_STREAM_STOP)
1081 NULL, SND_SOC_DAPM_POST_PMD);
1085 /* Queue it up for application */
1086 cur_sort = sort[w->id];
1087 cur_subseq = w->subseq;
1090 list_move(&w->power_list, &pending);
1095 dev_err(w->dapm->dev,
1096 "Failed to apply widget power: %d\n", ret);
1099 if (!list_empty(&pending))
1100 dapm_seq_run_coalesced(cur_dapm, &pending);
1102 if (cur_dapm && cur_dapm->seq_notifier) {
1103 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1104 if (sort[i] == cur_sort)
1105 cur_dapm->seq_notifier(cur_dapm,
1110 static void dapm_widget_update(struct snd_soc_dapm_context *dapm)
1112 struct snd_soc_dapm_update *update = dapm->update;
1113 struct snd_soc_dapm_widget *w;
1122 (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
1123 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
1125 pr_err("%s DAPM pre-event failed: %d\n",
1129 ret = snd_soc_update_bits(w->codec, update->reg, update->mask,
1132 pr_err("%s DAPM update failed: %d\n", w->name, ret);
1135 (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1136 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1138 pr_err("%s DAPM post-event failed: %d\n",
1143 /* Async callback run prior to DAPM sequences - brings to _PREPARE if
1144 * they're changing state.
1146 static void dapm_pre_sequence_async(void *data, async_cookie_t cookie)
1148 struct snd_soc_dapm_context *d = data;
1151 /* If we're off and we're not supposed to be go into STANDBY */
1152 if (d->bias_level == SND_SOC_BIAS_OFF &&
1153 d->target_bias_level != SND_SOC_BIAS_OFF) {
1154 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1157 "Failed to turn on bias: %d\n", ret);
1160 /* Prepare for a STADDBY->ON or ON->STANDBY transition */
1161 if (d->bias_level != d->target_bias_level) {
1162 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);
1165 "Failed to prepare bias: %d\n", ret);
1169 /* Async callback run prior to DAPM sequences - brings to their final
1172 static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
1174 struct snd_soc_dapm_context *d = data;
1177 /* If we just powered the last thing off drop to standby bias */
1178 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1179 (d->target_bias_level == SND_SOC_BIAS_STANDBY ||
1180 d->target_bias_level == SND_SOC_BIAS_OFF)) {
1181 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1183 dev_err(d->dev, "Failed to apply standby bias: %d\n",
1187 /* If we're in standby and can support bias off then do that */
1188 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1189 d->target_bias_level == SND_SOC_BIAS_OFF) {
1190 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);
1192 dev_err(d->dev, "Failed to turn off bias: %d\n", ret);
1195 /* If we just powered up then move to active bias */
1196 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1197 d->target_bias_level == SND_SOC_BIAS_ON) {
1198 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);
1200 dev_err(d->dev, "Failed to apply active bias: %d\n",
1205 static void dapm_widget_set_power(struct snd_soc_dapm_widget *w, bool power,
1206 struct list_head *up_list,
1207 struct list_head *down_list)
1209 if (w->power == power)
1212 trace_snd_soc_dapm_widget_power(w, power);
1215 dapm_seq_insert(w, up_list, true);
1217 dapm_seq_insert(w, down_list, false);
1222 static void dapm_power_one_widget(struct snd_soc_dapm_widget *w,
1223 struct list_head *up_list,
1224 struct list_head *down_list)
1229 case snd_soc_dapm_pre:
1230 dapm_seq_insert(w, down_list, false);
1232 case snd_soc_dapm_post:
1233 dapm_seq_insert(w, up_list, true);
1238 power = w->power_check(w);
1242 dapm_widget_set_power(w, power, up_list, down_list);
1248 * Scan each dapm widget for complete audio path.
1249 * A complete path is a route that has valid endpoints i.e.:-
1251 * o DAC to output pin.
1252 * o Input Pin to ADC.
1253 * o Input pin to Output pin (bypass, sidetone)
1254 * o DAC to ADC (loopback).
1256 static int dapm_power_widgets(struct snd_soc_dapm_context *dapm, int event)
1258 struct snd_soc_card *card = dapm->card;
1259 struct snd_soc_dapm_widget *w;
1260 struct snd_soc_dapm_context *d;
1262 LIST_HEAD(down_list);
1263 LIST_HEAD(async_domain);
1264 enum snd_soc_bias_level bias;
1266 trace_snd_soc_dapm_start(card);
1268 list_for_each_entry(d, &card->dapm_list, list) {
1269 if (d->n_widgets || d->codec == NULL) {
1270 if (d->idle_bias_off)
1271 d->target_bias_level = SND_SOC_BIAS_OFF;
1273 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1277 memset(&card->dapm_stats, 0, sizeof(card->dapm_stats));
1279 /* Check which widgets we need to power and store them in
1280 * lists indicating if they should be powered up or down.
1282 list_for_each_entry(w, &card->widgets, list) {
1283 dapm_power_one_widget(w, &up_list, &down_list);
1286 list_for_each_entry(w, &card->widgets, list) {
1290 /* Supplies and micbiases only bring the
1291 * context up to STANDBY as unless something
1292 * else is active and passing audio they
1293 * generally don't require full power.
1296 case snd_soc_dapm_supply:
1297 case snd_soc_dapm_micbias:
1298 if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
1299 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1302 d->target_bias_level = SND_SOC_BIAS_ON;
1309 /* If there are no DAPM widgets then try to figure out power from the
1312 if (!dapm->n_widgets) {
1314 case SND_SOC_DAPM_STREAM_START:
1315 case SND_SOC_DAPM_STREAM_RESUME:
1316 dapm->target_bias_level = SND_SOC_BIAS_ON;
1318 case SND_SOC_DAPM_STREAM_STOP:
1319 if (dapm->codec->active)
1320 dapm->target_bias_level = SND_SOC_BIAS_ON;
1322 dapm->target_bias_level = SND_SOC_BIAS_STANDBY;
1324 case SND_SOC_DAPM_STREAM_SUSPEND:
1325 dapm->target_bias_level = SND_SOC_BIAS_STANDBY;
1327 case SND_SOC_DAPM_STREAM_NOP:
1328 dapm->target_bias_level = dapm->bias_level;
1335 /* Force all contexts in the card to the same bias state if
1336 * they're not ground referenced.
1338 bias = SND_SOC_BIAS_OFF;
1339 list_for_each_entry(d, &card->dapm_list, list)
1340 if (d->target_bias_level > bias)
1341 bias = d->target_bias_level;
1342 list_for_each_entry(d, &card->dapm_list, list)
1343 if (!d->idle_bias_off)
1344 d->target_bias_level = bias;
1346 trace_snd_soc_dapm_walk_done(card);
1348 /* Run all the bias changes in parallel */
1349 list_for_each_entry(d, &dapm->card->dapm_list, list)
1350 async_schedule_domain(dapm_pre_sequence_async, d,
1352 async_synchronize_full_domain(&async_domain);
1354 /* Power down widgets first; try to avoid amplifying pops. */
1355 dapm_seq_run(dapm, &down_list, event, false);
1357 dapm_widget_update(dapm);
1360 dapm_seq_run(dapm, &up_list, event, true);
1362 /* Run all the bias changes in parallel */
1363 list_for_each_entry(d, &dapm->card->dapm_list, list)
1364 async_schedule_domain(dapm_post_sequence_async, d,
1366 async_synchronize_full_domain(&async_domain);
1368 pop_dbg(dapm->dev, card->pop_time,
1369 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
1370 pop_wait(card->pop_time);
1372 trace_snd_soc_dapm_done(card);
1377 #ifdef CONFIG_DEBUG_FS
1378 static int dapm_widget_power_open_file(struct inode *inode, struct file *file)
1380 file->private_data = inode->i_private;
1384 static ssize_t dapm_widget_power_read_file(struct file *file,
1385 char __user *user_buf,
1386 size_t count, loff_t *ppos)
1388 struct snd_soc_dapm_widget *w = file->private_data;
1392 struct snd_soc_dapm_path *p = NULL;
1394 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1398 in = is_connected_input_ep(w);
1399 dapm_clear_walk(w->dapm);
1400 out = is_connected_output_ep(w);
1401 dapm_clear_walk(w->dapm);
1403 ret = snprintf(buf, PAGE_SIZE, "%s: %s in %d out %d",
1404 w->name, w->power ? "On" : "Off", in, out);
1407 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1408 " - R%d(0x%x) bit %d",
1409 w->reg, w->reg, w->shift);
1411 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1414 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1416 w->active ? "active" : "inactive");
1418 list_for_each_entry(p, &w->sources, list_sink) {
1419 if (p->connected && !p->connected(w, p->sink))
1423 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1424 " in \"%s\" \"%s\"\n",
1425 p->name ? p->name : "static",
1428 list_for_each_entry(p, &w->sinks, list_source) {
1429 if (p->connected && !p->connected(w, p->sink))
1433 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1434 " out \"%s\" \"%s\"\n",
1435 p->name ? p->name : "static",
1439 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1445 static const struct file_operations dapm_widget_power_fops = {
1446 .open = dapm_widget_power_open_file,
1447 .read = dapm_widget_power_read_file,
1448 .llseek = default_llseek,
1451 static int dapm_bias_open_file(struct inode *inode, struct file *file)
1453 file->private_data = inode->i_private;
1457 static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
1458 size_t count, loff_t *ppos)
1460 struct snd_soc_dapm_context *dapm = file->private_data;
1463 switch (dapm->bias_level) {
1464 case SND_SOC_BIAS_ON:
1467 case SND_SOC_BIAS_PREPARE:
1468 level = "Prepare\n";
1470 case SND_SOC_BIAS_STANDBY:
1471 level = "Standby\n";
1473 case SND_SOC_BIAS_OFF:
1478 level = "Unknown\n";
1482 return simple_read_from_buffer(user_buf, count, ppos, level,
1486 static const struct file_operations dapm_bias_fops = {
1487 .open = dapm_bias_open_file,
1488 .read = dapm_bias_read_file,
1489 .llseek = default_llseek,
1492 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1493 struct dentry *parent)
1497 dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
1499 if (!dapm->debugfs_dapm) {
1501 "Failed to create DAPM debugfs directory\n");
1505 d = debugfs_create_file("bias_level", 0444,
1506 dapm->debugfs_dapm, dapm,
1510 "ASoC: Failed to create bias level debugfs file\n");
1513 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1515 struct snd_soc_dapm_context *dapm = w->dapm;
1518 if (!dapm->debugfs_dapm || !w->name)
1521 d = debugfs_create_file(w->name, 0444,
1522 dapm->debugfs_dapm, w,
1523 &dapm_widget_power_fops);
1525 dev_warn(w->dapm->dev,
1526 "ASoC: Failed to create %s debugfs file\n",
1530 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1532 debugfs_remove_recursive(dapm->debugfs_dapm);
1536 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1537 struct dentry *parent)
1541 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1545 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1551 /* test and update the power status of a mux widget */
1552 static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1553 struct snd_kcontrol *kcontrol, int change,
1554 int mux, struct soc_enum *e)
1556 struct snd_soc_dapm_path *path;
1559 if (widget->id != snd_soc_dapm_mux &&
1560 widget->id != snd_soc_dapm_virt_mux &&
1561 widget->id != snd_soc_dapm_value_mux)
1567 /* find dapm widget path assoc with kcontrol */
1568 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1569 if (path->kcontrol != kcontrol)
1572 if (!path->name || !e->texts[mux])
1576 /* we now need to match the string in the enum to the path */
1577 if (!(strcmp(path->name, e->texts[mux])))
1578 path->connect = 1; /* new connection */
1580 path->connect = 0; /* old connection must be powered down */
1584 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1589 /* test and update the power status of a mixer or switch widget */
1590 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1591 struct snd_kcontrol *kcontrol, int connect)
1593 struct snd_soc_dapm_path *path;
1596 if (widget->id != snd_soc_dapm_mixer &&
1597 widget->id != snd_soc_dapm_mixer_named_ctl &&
1598 widget->id != snd_soc_dapm_switch)
1601 /* find dapm widget path assoc with kcontrol */
1602 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1603 if (path->kcontrol != kcontrol)
1606 /* found, now check type */
1608 path->connect = connect;
1612 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1617 /* show dapm widget status in sys fs */
1618 static ssize_t dapm_widget_show(struct device *dev,
1619 struct device_attribute *attr, char *buf)
1621 struct snd_soc_pcm_runtime *rtd =
1622 container_of(dev, struct snd_soc_pcm_runtime, dev);
1623 struct snd_soc_codec *codec =rtd->codec;
1624 struct snd_soc_dapm_widget *w;
1626 char *state = "not set";
1628 list_for_each_entry(w, &codec->card->widgets, list) {
1629 if (w->dapm != &codec->dapm)
1632 /* only display widgets that burnm power */
1634 case snd_soc_dapm_hp:
1635 case snd_soc_dapm_mic:
1636 case snd_soc_dapm_spk:
1637 case snd_soc_dapm_line:
1638 case snd_soc_dapm_micbias:
1639 case snd_soc_dapm_dac:
1640 case snd_soc_dapm_adc:
1641 case snd_soc_dapm_pga:
1642 case snd_soc_dapm_out_drv:
1643 case snd_soc_dapm_mixer:
1644 case snd_soc_dapm_mixer_named_ctl:
1645 case snd_soc_dapm_supply:
1647 count += sprintf(buf + count, "%s: %s\n",
1648 w->name, w->power ? "On":"Off");
1655 switch (codec->dapm.bias_level) {
1656 case SND_SOC_BIAS_ON:
1659 case SND_SOC_BIAS_PREPARE:
1662 case SND_SOC_BIAS_STANDBY:
1665 case SND_SOC_BIAS_OFF:
1669 count += sprintf(buf + count, "PM State: %s\n", state);
1674 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
1676 int snd_soc_dapm_sys_add(struct device *dev)
1678 return device_create_file(dev, &dev_attr_dapm_widget);
1681 static void snd_soc_dapm_sys_remove(struct device *dev)
1683 device_remove_file(dev, &dev_attr_dapm_widget);
1686 /* free all dapm widgets and resources */
1687 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
1689 struct snd_soc_dapm_widget *w, *next_w;
1690 struct snd_soc_dapm_path *p, *next_p;
1692 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
1693 if (w->dapm != dapm)
1697 * remove source and sink paths associated to this widget.
1698 * While removing the path, remove reference to it from both
1699 * source and sink widgets so that path is removed only once.
1701 list_for_each_entry_safe(p, next_p, &w->sources, list_sink) {
1702 list_del(&p->list_sink);
1703 list_del(&p->list_source);
1705 kfree(p->long_name);
1708 list_for_each_entry_safe(p, next_p, &w->sinks, list_source) {
1709 list_del(&p->list_sink);
1710 list_del(&p->list_source);
1712 kfree(p->long_name);
1715 kfree(w->kcontrols);
1721 static struct snd_soc_dapm_widget *dapm_find_widget(
1722 struct snd_soc_dapm_context *dapm, const char *pin,
1723 bool search_other_contexts)
1725 struct snd_soc_dapm_widget *w;
1726 struct snd_soc_dapm_widget *fallback = NULL;
1728 list_for_each_entry(w, &dapm->card->widgets, list) {
1729 if (!strcmp(w->name, pin)) {
1730 if (w->dapm == dapm)
1737 if (search_other_contexts)
1743 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
1744 const char *pin, int status)
1746 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
1749 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
1753 w->connected = status;
1761 * snd_soc_dapm_sync - scan and power dapm paths
1762 * @dapm: DAPM context
1764 * Walks all dapm audio paths and powers widgets according to their
1765 * stream or path usage.
1767 * Returns 0 for success.
1769 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
1771 return dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
1773 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
1775 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
1776 const struct snd_soc_dapm_route *route)
1778 struct snd_soc_dapm_path *path;
1779 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
1780 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
1782 const char *control = route->control;
1784 char prefixed_sink[80];
1785 char prefixed_source[80];
1788 if (dapm->codec && dapm->codec->name_prefix) {
1789 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
1790 dapm->codec->name_prefix, route->sink);
1791 sink = prefixed_sink;
1792 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
1793 dapm->codec->name_prefix, route->source);
1794 source = prefixed_source;
1797 source = route->source;
1801 * find src and dest widgets over all widgets but favor a widget from
1802 * current DAPM context
1804 list_for_each_entry(w, &dapm->card->widgets, list) {
1805 if (!wsink && !(strcmp(w->name, sink))) {
1807 if (w->dapm == dapm)
1811 if (!wsource && !(strcmp(w->name, source))) {
1813 if (w->dapm == dapm)
1817 /* use widget from another DAPM context if not found from this */
1823 if (wsource == NULL || wsink == NULL)
1826 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
1830 path->source = wsource;
1832 path->connected = route->connected;
1833 INIT_LIST_HEAD(&path->list);
1834 INIT_LIST_HEAD(&path->list_source);
1835 INIT_LIST_HEAD(&path->list_sink);
1837 /* check for external widgets */
1838 if (wsink->id == snd_soc_dapm_input) {
1839 if (wsource->id == snd_soc_dapm_micbias ||
1840 wsource->id == snd_soc_dapm_mic ||
1841 wsource->id == snd_soc_dapm_line ||
1842 wsource->id == snd_soc_dapm_output)
1845 if (wsource->id == snd_soc_dapm_output) {
1846 if (wsink->id == snd_soc_dapm_spk ||
1847 wsink->id == snd_soc_dapm_hp ||
1848 wsink->id == snd_soc_dapm_line ||
1849 wsink->id == snd_soc_dapm_input)
1853 /* connect static paths */
1854 if (control == NULL) {
1855 list_add(&path->list, &dapm->card->paths);
1856 list_add(&path->list_sink, &wsink->sources);
1857 list_add(&path->list_source, &wsource->sinks);
1862 /* connect dynamic paths */
1863 switch (wsink->id) {
1864 case snd_soc_dapm_adc:
1865 case snd_soc_dapm_dac:
1866 case snd_soc_dapm_pga:
1867 case snd_soc_dapm_out_drv:
1868 case snd_soc_dapm_input:
1869 case snd_soc_dapm_output:
1870 case snd_soc_dapm_micbias:
1871 case snd_soc_dapm_vmid:
1872 case snd_soc_dapm_pre:
1873 case snd_soc_dapm_post:
1874 case snd_soc_dapm_supply:
1875 case snd_soc_dapm_aif_in:
1876 case snd_soc_dapm_aif_out:
1877 list_add(&path->list, &dapm->card->paths);
1878 list_add(&path->list_sink, &wsink->sources);
1879 list_add(&path->list_source, &wsource->sinks);
1882 case snd_soc_dapm_mux:
1883 case snd_soc_dapm_virt_mux:
1884 case snd_soc_dapm_value_mux:
1885 ret = dapm_connect_mux(dapm, wsource, wsink, path, control,
1886 &wsink->kcontrol_news[0]);
1890 case snd_soc_dapm_switch:
1891 case snd_soc_dapm_mixer:
1892 case snd_soc_dapm_mixer_named_ctl:
1893 ret = dapm_connect_mixer(dapm, wsource, wsink, path, control);
1897 case snd_soc_dapm_hp:
1898 case snd_soc_dapm_mic:
1899 case snd_soc_dapm_line:
1900 case snd_soc_dapm_spk:
1901 list_add(&path->list, &dapm->card->paths);
1902 list_add(&path->list_sink, &wsink->sources);
1903 list_add(&path->list_source, &wsource->sinks);
1910 dev_warn(dapm->dev, "asoc: no dapm match for %s --> %s --> %s\n",
1911 source, control, sink);
1917 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1918 * @dapm: DAPM context
1919 * @route: audio routes
1920 * @num: number of routes
1922 * Connects 2 dapm widgets together via a named audio path. The sink is
1923 * the widget receiving the audio signal, whilst the source is the sender
1924 * of the audio signal.
1926 * Returns 0 for success else error. On error all resources can be freed
1927 * with a call to snd_soc_card_free().
1929 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
1930 const struct snd_soc_dapm_route *route, int num)
1934 for (i = 0; i < num; i++) {
1935 ret = snd_soc_dapm_add_route(dapm, route);
1937 dev_err(dapm->dev, "Failed to add route %s->%s\n",
1938 route->source, route->sink);
1946 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
1948 static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm,
1949 const struct snd_soc_dapm_route *route)
1951 struct snd_soc_dapm_widget *source = dapm_find_widget(dapm,
1954 struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm,
1957 struct snd_soc_dapm_path *path;
1961 dev_err(dapm->dev, "Unable to find source %s for weak route\n",
1967 dev_err(dapm->dev, "Unable to find sink %s for weak route\n",
1972 if (route->control || route->connected)
1973 dev_warn(dapm->dev, "Ignoring control for weak route %s->%s\n",
1974 route->source, route->sink);
1976 list_for_each_entry(path, &source->sinks, list_source) {
1977 if (path->sink == sink) {
1984 dev_err(dapm->dev, "No path found for weak route %s->%s\n",
1985 route->source, route->sink);
1987 dev_warn(dapm->dev, "%d paths found for weak route %s->%s\n",
1988 count, route->source, route->sink);
1994 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
1995 * @dapm: DAPM context
1996 * @route: audio routes
1997 * @num: number of routes
1999 * Mark existing routes matching those specified in the passed array
2000 * as being weak, meaning that they are ignored for the purpose of
2001 * power decisions. The main intended use case is for sidetone paths
2002 * which couple audio between other independent paths if they are both
2003 * active in order to make the combination work better at the user
2004 * level but which aren't intended to be "used".
2006 * Note that CODEC drivers should not use this as sidetone type paths
2007 * can frequently also be used as bypass paths.
2009 int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm,
2010 const struct snd_soc_dapm_route *route, int num)
2015 for (i = 0; i < num; i++) {
2016 err = snd_soc_dapm_weak_route(dapm, route);
2024 EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes);
2027 * snd_soc_dapm_new_widgets - add new dapm widgets
2028 * @dapm: DAPM context
2030 * Checks the codec for any new dapm widgets and creates them if found.
2032 * Returns 0 for success.
2034 int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context *dapm)
2036 struct snd_soc_dapm_widget *w;
2039 list_for_each_entry(w, &dapm->card->widgets, list)
2044 if (w->num_kcontrols) {
2045 w->kcontrols = kzalloc(w->num_kcontrols *
2046 sizeof(struct snd_kcontrol *),
2053 case snd_soc_dapm_switch:
2054 case snd_soc_dapm_mixer:
2055 case snd_soc_dapm_mixer_named_ctl:
2056 w->power_check = dapm_generic_check_power;
2059 case snd_soc_dapm_mux:
2060 case snd_soc_dapm_virt_mux:
2061 case snd_soc_dapm_value_mux:
2062 w->power_check = dapm_generic_check_power;
2065 case snd_soc_dapm_adc:
2066 case snd_soc_dapm_aif_out:
2067 w->power_check = dapm_adc_check_power;
2069 case snd_soc_dapm_dac:
2070 case snd_soc_dapm_aif_in:
2071 w->power_check = dapm_dac_check_power;
2073 case snd_soc_dapm_pga:
2074 case snd_soc_dapm_out_drv:
2075 w->power_check = dapm_generic_check_power;
2078 case snd_soc_dapm_input:
2079 case snd_soc_dapm_output:
2080 case snd_soc_dapm_micbias:
2081 case snd_soc_dapm_spk:
2082 case snd_soc_dapm_hp:
2083 case snd_soc_dapm_mic:
2084 case snd_soc_dapm_line:
2085 w->power_check = dapm_generic_check_power;
2087 case snd_soc_dapm_supply:
2088 w->power_check = dapm_supply_check_power;
2089 case snd_soc_dapm_vmid:
2090 case snd_soc_dapm_pre:
2091 case snd_soc_dapm_post:
2095 if (!w->power_check)
2096 w->power_check = dapm_always_on_check_power;
2098 /* Read the initial power state from the device */
2100 val = soc_widget_read(w, w->reg);
2101 val &= 1 << w->shift;
2111 dapm_debugfs_add_widget(w);
2114 dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
2117 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
2120 * snd_soc_dapm_get_volsw - dapm mixer get callback
2121 * @kcontrol: mixer control
2122 * @ucontrol: control element information
2124 * Callback to get the value of a dapm mixer control.
2126 * Returns 0 for success.
2128 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
2129 struct snd_ctl_elem_value *ucontrol)
2131 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2132 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2133 struct soc_mixer_control *mc =
2134 (struct soc_mixer_control *)kcontrol->private_value;
2135 unsigned int reg = mc->reg;
2136 unsigned int shift = mc->shift;
2137 unsigned int rshift = mc->rshift;
2139 unsigned int invert = mc->invert;
2140 unsigned int mask = (1 << fls(max)) - 1;
2142 ucontrol->value.integer.value[0] =
2143 (snd_soc_read(widget->codec, reg) >> shift) & mask;
2144 if (shift != rshift)
2145 ucontrol->value.integer.value[1] =
2146 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
2148 ucontrol->value.integer.value[0] =
2149 max - ucontrol->value.integer.value[0];
2150 if (shift != rshift)
2151 ucontrol->value.integer.value[1] =
2152 max - ucontrol->value.integer.value[1];
2157 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
2160 * snd_soc_dapm_put_volsw - dapm mixer set callback
2161 * @kcontrol: mixer control
2162 * @ucontrol: control element information
2164 * Callback to set the value of a dapm mixer control.
2166 * Returns 0 for success.
2168 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
2169 struct snd_ctl_elem_value *ucontrol)
2171 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2172 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2173 struct snd_soc_codec *codec = widget->codec;
2174 struct soc_mixer_control *mc =
2175 (struct soc_mixer_control *)kcontrol->private_value;
2176 unsigned int reg = mc->reg;
2177 unsigned int shift = mc->shift;
2179 unsigned int mask = (1 << fls(max)) - 1;
2180 unsigned int invert = mc->invert;
2182 int connect, change;
2183 struct snd_soc_dapm_update update;
2186 val = (ucontrol->value.integer.value[0] & mask);
2190 mask = mask << shift;
2194 /* new connection */
2195 connect = invert ? 0 : 1;
2197 /* old connection must be powered down */
2198 connect = invert ? 1 : 0;
2200 mutex_lock(&codec->mutex);
2202 change = snd_soc_test_bits(widget->codec, reg, mask, val);
2204 for (wi = 0; wi < wlist->num_widgets; wi++) {
2205 widget = wlist->widgets[wi];
2207 widget->value = val;
2209 update.kcontrol = kcontrol;
2210 update.widget = widget;
2214 widget->dapm->update = &update;
2216 dapm_mixer_update_power(widget, kcontrol, connect);
2218 widget->dapm->update = NULL;
2222 mutex_unlock(&codec->mutex);
2225 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
2228 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
2229 * @kcontrol: mixer control
2230 * @ucontrol: control element information
2232 * Callback to get the value of a dapm enumerated double mixer control.
2234 * Returns 0 for success.
2236 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
2237 struct snd_ctl_elem_value *ucontrol)
2239 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2240 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2241 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2242 unsigned int val, bitmask;
2244 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2246 val = snd_soc_read(widget->codec, e->reg);
2247 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
2248 if (e->shift_l != e->shift_r)
2249 ucontrol->value.enumerated.item[1] =
2250 (val >> e->shift_r) & (bitmask - 1);
2254 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
2257 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
2258 * @kcontrol: mixer control
2259 * @ucontrol: control element information
2261 * Callback to set the value of a dapm enumerated double mixer control.
2263 * Returns 0 for success.
2265 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
2266 struct snd_ctl_elem_value *ucontrol)
2268 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2269 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2270 struct snd_soc_codec *codec = widget->codec;
2271 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2272 unsigned int val, mux, change;
2273 unsigned int mask, bitmask;
2274 struct snd_soc_dapm_update update;
2277 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2279 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2281 mux = ucontrol->value.enumerated.item[0];
2282 val = mux << e->shift_l;
2283 mask = (bitmask - 1) << e->shift_l;
2284 if (e->shift_l != e->shift_r) {
2285 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2287 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2288 mask |= (bitmask - 1) << e->shift_r;
2291 mutex_lock(&codec->mutex);
2293 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2295 for (wi = 0; wi < wlist->num_widgets; wi++) {
2296 widget = wlist->widgets[wi];
2298 widget->value = val;
2300 update.kcontrol = kcontrol;
2301 update.widget = widget;
2302 update.reg = e->reg;
2305 widget->dapm->update = &update;
2307 dapm_mux_update_power(widget, kcontrol, change, mux, e);
2309 widget->dapm->update = NULL;
2313 mutex_unlock(&codec->mutex);
2316 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
2319 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
2320 * @kcontrol: mixer control
2321 * @ucontrol: control element information
2323 * Returns 0 for success.
2325 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
2326 struct snd_ctl_elem_value *ucontrol)
2328 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2329 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2331 ucontrol->value.enumerated.item[0] = widget->value;
2335 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt);
2338 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
2339 * @kcontrol: mixer control
2340 * @ucontrol: control element information
2342 * Returns 0 for success.
2344 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
2345 struct snd_ctl_elem_value *ucontrol)
2347 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2348 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2349 struct snd_soc_codec *codec = widget->codec;
2350 struct soc_enum *e =
2351 (struct soc_enum *)kcontrol->private_value;
2356 if (ucontrol->value.enumerated.item[0] >= e->max)
2359 mutex_lock(&codec->mutex);
2361 change = widget->value != ucontrol->value.enumerated.item[0];
2363 for (wi = 0; wi < wlist->num_widgets; wi++) {
2364 widget = wlist->widgets[wi];
2366 widget->value = ucontrol->value.enumerated.item[0];
2368 dapm_mux_update_power(widget, kcontrol, change,
2373 mutex_unlock(&codec->mutex);
2376 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt);
2379 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
2381 * @kcontrol: mixer control
2382 * @ucontrol: control element information
2384 * Callback to get the value of a dapm semi enumerated double mixer control.
2386 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2387 * used for handling bitfield coded enumeration for example.
2389 * Returns 0 for success.
2391 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
2392 struct snd_ctl_elem_value *ucontrol)
2394 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2395 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2396 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2397 unsigned int reg_val, val, mux;
2399 reg_val = snd_soc_read(widget->codec, e->reg);
2400 val = (reg_val >> e->shift_l) & e->mask;
2401 for (mux = 0; mux < e->max; mux++) {
2402 if (val == e->values[mux])
2405 ucontrol->value.enumerated.item[0] = mux;
2406 if (e->shift_l != e->shift_r) {
2407 val = (reg_val >> e->shift_r) & e->mask;
2408 for (mux = 0; mux < e->max; mux++) {
2409 if (val == e->values[mux])
2412 ucontrol->value.enumerated.item[1] = mux;
2417 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
2420 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
2422 * @kcontrol: mixer control
2423 * @ucontrol: control element information
2425 * Callback to set the value of a dapm semi enumerated double mixer control.
2427 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2428 * used for handling bitfield coded enumeration for example.
2430 * Returns 0 for success.
2432 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
2433 struct snd_ctl_elem_value *ucontrol)
2435 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2436 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2437 struct snd_soc_codec *codec = widget->codec;
2438 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2439 unsigned int val, mux, change;
2441 struct snd_soc_dapm_update update;
2444 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2446 mux = ucontrol->value.enumerated.item[0];
2447 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2448 mask = e->mask << e->shift_l;
2449 if (e->shift_l != e->shift_r) {
2450 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2452 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2453 mask |= e->mask << e->shift_r;
2456 mutex_lock(&codec->mutex);
2458 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2460 for (wi = 0; wi < wlist->num_widgets; wi++) {
2461 widget = wlist->widgets[wi];
2463 widget->value = val;
2465 update.kcontrol = kcontrol;
2466 update.widget = widget;
2467 update.reg = e->reg;
2470 widget->dapm->update = &update;
2472 dapm_mux_update_power(widget, kcontrol, change, mux, e);
2474 widget->dapm->update = NULL;
2478 mutex_unlock(&codec->mutex);
2481 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
2484 * snd_soc_dapm_info_pin_switch - Info for a pin switch
2486 * @kcontrol: mixer control
2487 * @uinfo: control element information
2489 * Callback to provide information about a pin switch control.
2491 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
2492 struct snd_ctl_elem_info *uinfo)
2494 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2496 uinfo->value.integer.min = 0;
2497 uinfo->value.integer.max = 1;
2501 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
2504 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
2506 * @kcontrol: mixer control
2509 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
2510 struct snd_ctl_elem_value *ucontrol)
2512 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2513 const char *pin = (const char *)kcontrol->private_value;
2515 mutex_lock(&codec->mutex);
2517 ucontrol->value.integer.value[0] =
2518 snd_soc_dapm_get_pin_status(&codec->dapm, pin);
2520 mutex_unlock(&codec->mutex);
2524 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
2527 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
2529 * @kcontrol: mixer control
2532 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
2533 struct snd_ctl_elem_value *ucontrol)
2535 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2536 const char *pin = (const char *)kcontrol->private_value;
2538 mutex_lock(&codec->mutex);
2540 if (ucontrol->value.integer.value[0])
2541 snd_soc_dapm_enable_pin(&codec->dapm, pin);
2543 snd_soc_dapm_disable_pin(&codec->dapm, pin);
2545 snd_soc_dapm_sync(&codec->dapm);
2547 mutex_unlock(&codec->mutex);
2551 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
2554 * snd_soc_dapm_new_control - create new dapm control
2555 * @dapm: DAPM context
2556 * @widget: widget template
2558 * Creates a new dapm control based upon the template.
2560 * Returns 0 for success else error.
2562 int snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
2563 const struct snd_soc_dapm_widget *widget)
2565 struct snd_soc_dapm_widget *w;
2568 if ((w = dapm_cnew_widget(widget)) == NULL)
2571 name_len = strlen(widget->name) + 1;
2572 if (dapm->codec && dapm->codec->name_prefix)
2573 name_len += 1 + strlen(dapm->codec->name_prefix);
2574 w->name = kmalloc(name_len, GFP_KERNEL);
2575 if (w->name == NULL) {
2579 if (dapm->codec && dapm->codec->name_prefix)
2580 snprintf(w->name, name_len, "%s %s",
2581 dapm->codec->name_prefix, widget->name);
2583 snprintf(w->name, name_len, "%s", widget->name);
2587 w->codec = dapm->codec;
2588 w->platform = dapm->platform;
2589 INIT_LIST_HEAD(&w->sources);
2590 INIT_LIST_HEAD(&w->sinks);
2591 INIT_LIST_HEAD(&w->list);
2592 list_add(&w->list, &dapm->card->widgets);
2594 /* machine layer set ups unconnected pins and insertions */
2598 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
2601 * snd_soc_dapm_new_controls - create new dapm controls
2602 * @dapm: DAPM context
2603 * @widget: widget array
2604 * @num: number of widgets
2606 * Creates new DAPM controls based upon the templates.
2608 * Returns 0 for success else error.
2610 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
2611 const struct snd_soc_dapm_widget *widget,
2616 for (i = 0; i < num; i++) {
2617 ret = snd_soc_dapm_new_control(dapm, widget);
2620 "ASoC: Failed to create DAPM control %s: %d\n",
2628 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
2630 static void soc_dapm_stream_event(struct snd_soc_dapm_context *dapm,
2631 const char *stream, int event)
2633 struct snd_soc_dapm_widget *w;
2635 list_for_each_entry(w, &dapm->card->widgets, list)
2637 if (!w->sname || w->dapm != dapm)
2639 dev_vdbg(w->dapm->dev, "widget %s\n %s stream %s event %d\n",
2640 w->name, w->sname, stream, event);
2641 if (strstr(w->sname, stream)) {
2643 case SND_SOC_DAPM_STREAM_START:
2646 case SND_SOC_DAPM_STREAM_STOP:
2649 case SND_SOC_DAPM_STREAM_SUSPEND:
2650 case SND_SOC_DAPM_STREAM_RESUME:
2651 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
2652 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
2658 dapm_power_widgets(dapm, event);
2660 /* do we need to notify any clients that DAPM stream is complete */
2661 if (dapm->stream_event)
2662 dapm->stream_event(dapm, event);
2666 * snd_soc_dapm_stream_event - send a stream event to the dapm core
2667 * @rtd: PCM runtime data
2668 * @stream: stream name
2669 * @event: stream event
2671 * Sends a stream event to the dapm core. The core then makes any
2672 * necessary widget power changes.
2674 * Returns 0 for success else error.
2676 int snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd,
2677 const char *stream, int event)
2679 struct snd_soc_codec *codec = rtd->codec;
2684 mutex_lock(&codec->mutex);
2685 soc_dapm_stream_event(&codec->dapm, stream, event);
2686 mutex_unlock(&codec->mutex);
2691 * snd_soc_dapm_enable_pin - enable pin.
2692 * @dapm: DAPM context
2695 * Enables input/output pin and its parents or children widgets iff there is
2696 * a valid audio route and active audio stream.
2697 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2698 * do any widget power switching.
2700 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
2702 return snd_soc_dapm_set_pin(dapm, pin, 1);
2704 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
2707 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
2708 * @dapm: DAPM context
2711 * Enables input/output pin regardless of any other state. This is
2712 * intended for use with microphone bias supplies used in microphone
2715 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2716 * do any widget power switching.
2718 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
2721 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2724 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
2728 dev_dbg(w->dapm->dev, "dapm: force enable pin %s\n", pin);
2734 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
2737 * snd_soc_dapm_disable_pin - disable pin.
2738 * @dapm: DAPM context
2741 * Disables input/output pin and its parents or children widgets.
2742 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2743 * do any widget power switching.
2745 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
2748 return snd_soc_dapm_set_pin(dapm, pin, 0);
2750 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
2753 * snd_soc_dapm_nc_pin - permanently disable pin.
2754 * @dapm: DAPM context
2757 * Marks the specified pin as being not connected, disabling it along
2758 * any parent or child widgets. At present this is identical to
2759 * snd_soc_dapm_disable_pin() but in future it will be extended to do
2760 * additional things such as disabling controls which only affect
2761 * paths through the pin.
2763 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2764 * do any widget power switching.
2766 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
2768 return snd_soc_dapm_set_pin(dapm, pin, 0);
2770 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
2773 * snd_soc_dapm_get_pin_status - get audio pin status
2774 * @dapm: DAPM context
2775 * @pin: audio signal pin endpoint (or start point)
2777 * Get audio pin status - connected or disconnected.
2779 * Returns 1 for connected otherwise 0.
2781 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
2784 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2787 return w->connected;
2791 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
2794 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
2795 * @dapm: DAPM context
2796 * @pin: audio signal pin endpoint (or start point)
2798 * Mark the given endpoint or pin as ignoring suspend. When the
2799 * system is disabled a path between two endpoints flagged as ignoring
2800 * suspend will not be disabled. The path must already be enabled via
2801 * normal means at suspend time, it will not be turned on if it was not
2804 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
2807 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
2810 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
2814 w->ignore_suspend = 1;
2818 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
2821 * snd_soc_dapm_free - free dapm resources
2822 * @dapm: DAPM context
2824 * Free all dapm widgets and resources.
2826 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
2828 snd_soc_dapm_sys_remove(dapm->dev);
2829 dapm_debugfs_cleanup(dapm);
2830 dapm_free_widgets(dapm);
2831 list_del(&dapm->list);
2833 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
2835 static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context *dapm)
2837 struct snd_soc_dapm_widget *w;
2838 LIST_HEAD(down_list);
2841 list_for_each_entry(w, &dapm->card->widgets, list) {
2842 if (w->dapm != dapm)
2845 dapm_seq_insert(w, &down_list, false);
2851 /* If there were no widgets to power down we're already in
2855 snd_soc_dapm_set_bias_level(dapm, SND_SOC_BIAS_PREPARE);
2856 dapm_seq_run(dapm, &down_list, 0, false);
2857 snd_soc_dapm_set_bias_level(dapm, SND_SOC_BIAS_STANDBY);
2862 * snd_soc_dapm_shutdown - callback for system shutdown
2864 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
2866 struct snd_soc_codec *codec;
2868 list_for_each_entry(codec, &card->codec_dev_list, list) {
2869 soc_dapm_shutdown_codec(&codec->dapm);
2870 snd_soc_dapm_set_bias_level(&codec->dapm, SND_SOC_BIAS_OFF);
2874 /* Module information */
2875 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2876 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
2877 MODULE_LICENSE("GPL");