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_seq_compare(struct snd_soc_dapm_widget *a,
861 struct snd_soc_dapm_widget *b,
869 sort = dapm_down_seq;
871 if (sort[a->id] != sort[b->id])
872 return sort[a->id] - sort[b->id];
873 if (a->subseq != b->subseq) {
875 return a->subseq - b->subseq;
877 return b->subseq - a->subseq;
879 if (a->reg != b->reg)
880 return a->reg - b->reg;
881 if (a->dapm != b->dapm)
882 return (unsigned long)a->dapm - (unsigned long)b->dapm;
887 /* Insert a widget in order into a DAPM power sequence. */
888 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
889 struct list_head *list,
892 struct snd_soc_dapm_widget *w;
894 list_for_each_entry(w, list, power_list)
895 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
896 list_add_tail(&new_widget->power_list, &w->power_list);
900 list_add_tail(&new_widget->power_list, list);
903 static void dapm_seq_check_event(struct snd_soc_dapm_context *dapm,
904 struct snd_soc_dapm_widget *w, int event)
906 struct snd_soc_card *card = dapm->card;
911 case SND_SOC_DAPM_PRE_PMU:
915 case SND_SOC_DAPM_POST_PMU:
916 ev_name = "POST_PMU";
919 case SND_SOC_DAPM_PRE_PMD:
923 case SND_SOC_DAPM_POST_PMD:
924 ev_name = "POST_PMD";
932 if (w->power != power)
935 if (w->event && (w->event_flags & event)) {
936 pop_dbg(dapm->dev, card->pop_time, "pop test : %s %s\n",
938 trace_snd_soc_dapm_widget_event_start(w, event);
939 ret = w->event(w, NULL, event);
940 trace_snd_soc_dapm_widget_event_done(w, event);
942 pr_err("%s: %s event failed: %d\n",
943 ev_name, w->name, ret);
947 /* Apply the coalesced changes from a DAPM sequence */
948 static void dapm_seq_run_coalesced(struct snd_soc_dapm_context *dapm,
949 struct list_head *pending)
951 struct snd_soc_card *card = dapm->card;
952 struct snd_soc_dapm_widget *w;
954 unsigned int value = 0;
955 unsigned int mask = 0;
956 unsigned int cur_mask;
958 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
961 list_for_each_entry(w, pending, power_list) {
962 cur_mask = 1 << w->shift;
963 BUG_ON(reg != w->reg);
974 pop_dbg(dapm->dev, card->pop_time,
975 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
976 w->name, reg, value, mask);
978 /* Check for events */
979 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMU);
980 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMD);
984 /* Any widget will do, they should all be updating the
987 w = list_first_entry(pending, struct snd_soc_dapm_widget,
990 pop_dbg(dapm->dev, card->pop_time,
991 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
992 value, mask, reg, card->pop_time);
993 pop_wait(card->pop_time);
994 soc_widget_update_bits(w, reg, mask, value);
997 list_for_each_entry(w, pending, power_list) {
998 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMU);
999 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMD);
1003 /* Apply a DAPM power sequence.
1005 * We walk over a pre-sorted list of widgets to apply power to. In
1006 * order to minimise the number of writes to the device required
1007 * multiple widgets will be updated in a single write where possible.
1008 * Currently anything that requires more than a single write is not
1011 static void dapm_seq_run(struct snd_soc_dapm_context *dapm,
1012 struct list_head *list, int event, bool power_up)
1014 struct snd_soc_dapm_widget *w, *n;
1017 int cur_subseq = -1;
1018 int cur_reg = SND_SOC_NOPM;
1019 struct snd_soc_dapm_context *cur_dapm = NULL;
1026 sort = dapm_down_seq;
1028 list_for_each_entry_safe(w, n, list, power_list) {
1031 /* Do we need to apply any queued changes? */
1032 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
1033 w->dapm != cur_dapm || w->subseq != cur_subseq) {
1034 if (!list_empty(&pending))
1035 dapm_seq_run_coalesced(cur_dapm, &pending);
1037 if (cur_dapm && cur_dapm->seq_notifier) {
1038 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1039 if (sort[i] == cur_sort)
1040 cur_dapm->seq_notifier(cur_dapm,
1045 INIT_LIST_HEAD(&pending);
1047 cur_subseq = INT_MIN;
1048 cur_reg = SND_SOC_NOPM;
1053 case snd_soc_dapm_pre:
1055 list_for_each_entry_safe_continue(w, n, list,
1058 if (event == SND_SOC_DAPM_STREAM_START)
1060 NULL, SND_SOC_DAPM_PRE_PMU);
1061 else if (event == SND_SOC_DAPM_STREAM_STOP)
1063 NULL, SND_SOC_DAPM_PRE_PMD);
1066 case snd_soc_dapm_post:
1068 list_for_each_entry_safe_continue(w, n, list,
1071 if (event == SND_SOC_DAPM_STREAM_START)
1073 NULL, SND_SOC_DAPM_POST_PMU);
1074 else if (event == SND_SOC_DAPM_STREAM_STOP)
1076 NULL, SND_SOC_DAPM_POST_PMD);
1080 /* Queue it up for application */
1081 cur_sort = sort[w->id];
1082 cur_subseq = w->subseq;
1085 list_move(&w->power_list, &pending);
1090 dev_err(w->dapm->dev,
1091 "Failed to apply widget power: %d\n", ret);
1094 if (!list_empty(&pending))
1095 dapm_seq_run_coalesced(cur_dapm, &pending);
1097 if (cur_dapm && cur_dapm->seq_notifier) {
1098 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1099 if (sort[i] == cur_sort)
1100 cur_dapm->seq_notifier(cur_dapm,
1105 static void dapm_widget_update(struct snd_soc_dapm_context *dapm)
1107 struct snd_soc_dapm_update *update = dapm->update;
1108 struct snd_soc_dapm_widget *w;
1117 (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
1118 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
1120 pr_err("%s DAPM pre-event failed: %d\n",
1124 ret = snd_soc_update_bits(w->codec, update->reg, update->mask,
1127 pr_err("%s DAPM update failed: %d\n", w->name, ret);
1130 (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1131 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1133 pr_err("%s DAPM post-event failed: %d\n",
1138 /* Async callback run prior to DAPM sequences - brings to _PREPARE if
1139 * they're changing state.
1141 static void dapm_pre_sequence_async(void *data, async_cookie_t cookie)
1143 struct snd_soc_dapm_context *d = data;
1146 /* If we're off and we're not supposed to be go into STANDBY */
1147 if (d->bias_level == SND_SOC_BIAS_OFF &&
1148 d->target_bias_level != SND_SOC_BIAS_OFF) {
1149 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1152 "Failed to turn on bias: %d\n", ret);
1155 /* Prepare for a STADDBY->ON or ON->STANDBY transition */
1156 if (d->bias_level != d->target_bias_level) {
1157 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);
1160 "Failed to prepare bias: %d\n", ret);
1164 /* Async callback run prior to DAPM sequences - brings to their final
1167 static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
1169 struct snd_soc_dapm_context *d = data;
1172 /* If we just powered the last thing off drop to standby bias */
1173 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1174 (d->target_bias_level == SND_SOC_BIAS_STANDBY ||
1175 d->target_bias_level == SND_SOC_BIAS_OFF)) {
1176 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1178 dev_err(d->dev, "Failed to apply standby bias: %d\n",
1182 /* If we're in standby and can support bias off then do that */
1183 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1184 d->target_bias_level == SND_SOC_BIAS_OFF) {
1185 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);
1187 dev_err(d->dev, "Failed to turn off bias: %d\n", ret);
1190 /* If we just powered up then move to active bias */
1191 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1192 d->target_bias_level == SND_SOC_BIAS_ON) {
1193 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);
1195 dev_err(d->dev, "Failed to apply active bias: %d\n",
1200 static void dapm_power_one_widget(struct snd_soc_dapm_widget *w,
1201 struct list_head *up_list,
1202 struct list_head *down_list)
1204 struct snd_soc_dapm_context *d;
1208 case snd_soc_dapm_pre:
1209 dapm_seq_insert(w, down_list, false);
1211 case snd_soc_dapm_post:
1212 dapm_seq_insert(w, up_list, true);
1216 if (!w->power_check)
1220 power = w->power_check(w);
1227 /* Supplies and micbiases only bring the
1228 * context up to STANDBY as unless something
1229 * else is active and passing audio they
1230 * generally don't require full power.
1233 case snd_soc_dapm_supply:
1234 case snd_soc_dapm_micbias:
1235 if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
1236 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1239 d->target_bias_level = SND_SOC_BIAS_ON;
1244 if (w->power == power)
1247 trace_snd_soc_dapm_widget_power(w, power);
1250 dapm_seq_insert(w, up_list, true);
1252 dapm_seq_insert(w, down_list, false);
1260 * Scan each dapm widget for complete audio path.
1261 * A complete path is a route that has valid endpoints i.e.:-
1263 * o DAC to output pin.
1264 * o Input Pin to ADC.
1265 * o Input pin to Output pin (bypass, sidetone)
1266 * o DAC to ADC (loopback).
1268 static int dapm_power_widgets(struct snd_soc_dapm_context *dapm, int event)
1270 struct snd_soc_card *card = dapm->card;
1271 struct snd_soc_dapm_widget *w;
1272 struct snd_soc_dapm_context *d;
1274 LIST_HEAD(down_list);
1275 LIST_HEAD(async_domain);
1276 enum snd_soc_bias_level bias;
1278 trace_snd_soc_dapm_start(card);
1280 list_for_each_entry(d, &card->dapm_list, list) {
1281 if (d->n_widgets || d->codec == NULL) {
1282 if (d->idle_bias_off)
1283 d->target_bias_level = SND_SOC_BIAS_OFF;
1285 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1289 memset(&card->dapm_stats, 0, sizeof(card->dapm_stats));
1291 /* Check which widgets we need to power and store them in
1292 * lists indicating if they should be powered up or down.
1294 list_for_each_entry(w, &card->widgets, list) {
1295 dapm_power_one_widget(w, &up_list, &down_list);
1298 /* If there are no DAPM widgets then try to figure out power from the
1301 if (!dapm->n_widgets) {
1303 case SND_SOC_DAPM_STREAM_START:
1304 case SND_SOC_DAPM_STREAM_RESUME:
1305 dapm->target_bias_level = SND_SOC_BIAS_ON;
1307 case SND_SOC_DAPM_STREAM_STOP:
1308 if (dapm->codec->active)
1309 dapm->target_bias_level = SND_SOC_BIAS_ON;
1311 dapm->target_bias_level = SND_SOC_BIAS_STANDBY;
1313 case SND_SOC_DAPM_STREAM_SUSPEND:
1314 dapm->target_bias_level = SND_SOC_BIAS_STANDBY;
1316 case SND_SOC_DAPM_STREAM_NOP:
1317 dapm->target_bias_level = dapm->bias_level;
1324 /* Force all contexts in the card to the same bias state if
1325 * they're not ground referenced.
1327 bias = SND_SOC_BIAS_OFF;
1328 list_for_each_entry(d, &card->dapm_list, list)
1329 if (d->target_bias_level > bias)
1330 bias = d->target_bias_level;
1331 list_for_each_entry(d, &card->dapm_list, list)
1332 if (!d->idle_bias_off)
1333 d->target_bias_level = bias;
1335 trace_snd_soc_dapm_walk_done(card);
1337 /* Run all the bias changes in parallel */
1338 list_for_each_entry(d, &dapm->card->dapm_list, list)
1339 async_schedule_domain(dapm_pre_sequence_async, d,
1341 async_synchronize_full_domain(&async_domain);
1343 /* Power down widgets first; try to avoid amplifying pops. */
1344 dapm_seq_run(dapm, &down_list, event, false);
1346 dapm_widget_update(dapm);
1349 dapm_seq_run(dapm, &up_list, event, true);
1351 /* Run all the bias changes in parallel */
1352 list_for_each_entry(d, &dapm->card->dapm_list, list)
1353 async_schedule_domain(dapm_post_sequence_async, d,
1355 async_synchronize_full_domain(&async_domain);
1357 pop_dbg(dapm->dev, card->pop_time,
1358 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
1359 pop_wait(card->pop_time);
1361 trace_snd_soc_dapm_done(card);
1366 #ifdef CONFIG_DEBUG_FS
1367 static int dapm_widget_power_open_file(struct inode *inode, struct file *file)
1369 file->private_data = inode->i_private;
1373 static ssize_t dapm_widget_power_read_file(struct file *file,
1374 char __user *user_buf,
1375 size_t count, loff_t *ppos)
1377 struct snd_soc_dapm_widget *w = file->private_data;
1381 struct snd_soc_dapm_path *p = NULL;
1383 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1387 in = is_connected_input_ep(w);
1388 dapm_clear_walk(w->dapm);
1389 out = is_connected_output_ep(w);
1390 dapm_clear_walk(w->dapm);
1392 ret = snprintf(buf, PAGE_SIZE, "%s: %s in %d out %d",
1393 w->name, w->power ? "On" : "Off", in, out);
1396 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1397 " - R%d(0x%x) bit %d",
1398 w->reg, w->reg, w->shift);
1400 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1403 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1405 w->active ? "active" : "inactive");
1407 list_for_each_entry(p, &w->sources, list_sink) {
1408 if (p->connected && !p->connected(w, p->sink))
1412 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1413 " in \"%s\" \"%s\"\n",
1414 p->name ? p->name : "static",
1417 list_for_each_entry(p, &w->sinks, list_source) {
1418 if (p->connected && !p->connected(w, p->sink))
1422 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1423 " out \"%s\" \"%s\"\n",
1424 p->name ? p->name : "static",
1428 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1434 static const struct file_operations dapm_widget_power_fops = {
1435 .open = dapm_widget_power_open_file,
1436 .read = dapm_widget_power_read_file,
1437 .llseek = default_llseek,
1440 static int dapm_bias_open_file(struct inode *inode, struct file *file)
1442 file->private_data = inode->i_private;
1446 static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
1447 size_t count, loff_t *ppos)
1449 struct snd_soc_dapm_context *dapm = file->private_data;
1452 switch (dapm->bias_level) {
1453 case SND_SOC_BIAS_ON:
1456 case SND_SOC_BIAS_PREPARE:
1457 level = "Prepare\n";
1459 case SND_SOC_BIAS_STANDBY:
1460 level = "Standby\n";
1462 case SND_SOC_BIAS_OFF:
1467 level = "Unknown\n";
1471 return simple_read_from_buffer(user_buf, count, ppos, level,
1475 static const struct file_operations dapm_bias_fops = {
1476 .open = dapm_bias_open_file,
1477 .read = dapm_bias_read_file,
1478 .llseek = default_llseek,
1481 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1482 struct dentry *parent)
1486 dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
1488 if (!dapm->debugfs_dapm) {
1490 "Failed to create DAPM debugfs directory\n");
1494 d = debugfs_create_file("bias_level", 0444,
1495 dapm->debugfs_dapm, dapm,
1499 "ASoC: Failed to create bias level debugfs file\n");
1502 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1504 struct snd_soc_dapm_context *dapm = w->dapm;
1507 if (!dapm->debugfs_dapm || !w->name)
1510 d = debugfs_create_file(w->name, 0444,
1511 dapm->debugfs_dapm, w,
1512 &dapm_widget_power_fops);
1514 dev_warn(w->dapm->dev,
1515 "ASoC: Failed to create %s debugfs file\n",
1519 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1521 debugfs_remove_recursive(dapm->debugfs_dapm);
1525 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1526 struct dentry *parent)
1530 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1534 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1540 /* test and update the power status of a mux widget */
1541 static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1542 struct snd_kcontrol *kcontrol, int change,
1543 int mux, struct soc_enum *e)
1545 struct snd_soc_dapm_path *path;
1548 if (widget->id != snd_soc_dapm_mux &&
1549 widget->id != snd_soc_dapm_virt_mux &&
1550 widget->id != snd_soc_dapm_value_mux)
1556 /* find dapm widget path assoc with kcontrol */
1557 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1558 if (path->kcontrol != kcontrol)
1561 if (!path->name || !e->texts[mux])
1565 /* we now need to match the string in the enum to the path */
1566 if (!(strcmp(path->name, e->texts[mux])))
1567 path->connect = 1; /* new connection */
1569 path->connect = 0; /* old connection must be powered down */
1573 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1578 /* test and update the power status of a mixer or switch widget */
1579 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1580 struct snd_kcontrol *kcontrol, int connect)
1582 struct snd_soc_dapm_path *path;
1585 if (widget->id != snd_soc_dapm_mixer &&
1586 widget->id != snd_soc_dapm_mixer_named_ctl &&
1587 widget->id != snd_soc_dapm_switch)
1590 /* find dapm widget path assoc with kcontrol */
1591 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1592 if (path->kcontrol != kcontrol)
1595 /* found, now check type */
1597 path->connect = connect;
1601 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1606 /* show dapm widget status in sys fs */
1607 static ssize_t dapm_widget_show(struct device *dev,
1608 struct device_attribute *attr, char *buf)
1610 struct snd_soc_pcm_runtime *rtd =
1611 container_of(dev, struct snd_soc_pcm_runtime, dev);
1612 struct snd_soc_codec *codec =rtd->codec;
1613 struct snd_soc_dapm_widget *w;
1615 char *state = "not set";
1617 list_for_each_entry(w, &codec->card->widgets, list) {
1618 if (w->dapm != &codec->dapm)
1621 /* only display widgets that burnm power */
1623 case snd_soc_dapm_hp:
1624 case snd_soc_dapm_mic:
1625 case snd_soc_dapm_spk:
1626 case snd_soc_dapm_line:
1627 case snd_soc_dapm_micbias:
1628 case snd_soc_dapm_dac:
1629 case snd_soc_dapm_adc:
1630 case snd_soc_dapm_pga:
1631 case snd_soc_dapm_out_drv:
1632 case snd_soc_dapm_mixer:
1633 case snd_soc_dapm_mixer_named_ctl:
1634 case snd_soc_dapm_supply:
1636 count += sprintf(buf + count, "%s: %s\n",
1637 w->name, w->power ? "On":"Off");
1644 switch (codec->dapm.bias_level) {
1645 case SND_SOC_BIAS_ON:
1648 case SND_SOC_BIAS_PREPARE:
1651 case SND_SOC_BIAS_STANDBY:
1654 case SND_SOC_BIAS_OFF:
1658 count += sprintf(buf + count, "PM State: %s\n", state);
1663 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
1665 int snd_soc_dapm_sys_add(struct device *dev)
1667 return device_create_file(dev, &dev_attr_dapm_widget);
1670 static void snd_soc_dapm_sys_remove(struct device *dev)
1672 device_remove_file(dev, &dev_attr_dapm_widget);
1675 /* free all dapm widgets and resources */
1676 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
1678 struct snd_soc_dapm_widget *w, *next_w;
1679 struct snd_soc_dapm_path *p, *next_p;
1681 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
1682 if (w->dapm != dapm)
1686 * remove source and sink paths associated to this widget.
1687 * While removing the path, remove reference to it from both
1688 * source and sink widgets so that path is removed only once.
1690 list_for_each_entry_safe(p, next_p, &w->sources, list_sink) {
1691 list_del(&p->list_sink);
1692 list_del(&p->list_source);
1694 kfree(p->long_name);
1697 list_for_each_entry_safe(p, next_p, &w->sinks, list_source) {
1698 list_del(&p->list_sink);
1699 list_del(&p->list_source);
1701 kfree(p->long_name);
1704 kfree(w->kcontrols);
1710 static struct snd_soc_dapm_widget *dapm_find_widget(
1711 struct snd_soc_dapm_context *dapm, const char *pin,
1712 bool search_other_contexts)
1714 struct snd_soc_dapm_widget *w;
1715 struct snd_soc_dapm_widget *fallback = NULL;
1717 list_for_each_entry(w, &dapm->card->widgets, list) {
1718 if (!strcmp(w->name, pin)) {
1719 if (w->dapm == dapm)
1726 if (search_other_contexts)
1732 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
1733 const char *pin, int status)
1735 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
1738 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
1742 w->connected = status;
1750 * snd_soc_dapm_sync - scan and power dapm paths
1751 * @dapm: DAPM context
1753 * Walks all dapm audio paths and powers widgets according to their
1754 * stream or path usage.
1756 * Returns 0 for success.
1758 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
1760 return dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
1762 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
1764 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
1765 const struct snd_soc_dapm_route *route)
1767 struct snd_soc_dapm_path *path;
1768 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
1769 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
1771 const char *control = route->control;
1773 char prefixed_sink[80];
1774 char prefixed_source[80];
1777 if (dapm->codec && dapm->codec->name_prefix) {
1778 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
1779 dapm->codec->name_prefix, route->sink);
1780 sink = prefixed_sink;
1781 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
1782 dapm->codec->name_prefix, route->source);
1783 source = prefixed_source;
1786 source = route->source;
1790 * find src and dest widgets over all widgets but favor a widget from
1791 * current DAPM context
1793 list_for_each_entry(w, &dapm->card->widgets, list) {
1794 if (!wsink && !(strcmp(w->name, sink))) {
1796 if (w->dapm == dapm)
1800 if (!wsource && !(strcmp(w->name, source))) {
1802 if (w->dapm == dapm)
1806 /* use widget from another DAPM context if not found from this */
1812 if (wsource == NULL || wsink == NULL)
1815 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
1819 path->source = wsource;
1821 path->connected = route->connected;
1822 INIT_LIST_HEAD(&path->list);
1823 INIT_LIST_HEAD(&path->list_source);
1824 INIT_LIST_HEAD(&path->list_sink);
1826 /* check for external widgets */
1827 if (wsink->id == snd_soc_dapm_input) {
1828 if (wsource->id == snd_soc_dapm_micbias ||
1829 wsource->id == snd_soc_dapm_mic ||
1830 wsource->id == snd_soc_dapm_line ||
1831 wsource->id == snd_soc_dapm_output)
1834 if (wsource->id == snd_soc_dapm_output) {
1835 if (wsink->id == snd_soc_dapm_spk ||
1836 wsink->id == snd_soc_dapm_hp ||
1837 wsink->id == snd_soc_dapm_line ||
1838 wsink->id == snd_soc_dapm_input)
1842 /* connect static paths */
1843 if (control == NULL) {
1844 list_add(&path->list, &dapm->card->paths);
1845 list_add(&path->list_sink, &wsink->sources);
1846 list_add(&path->list_source, &wsource->sinks);
1851 /* connect dynamic paths */
1852 switch (wsink->id) {
1853 case snd_soc_dapm_adc:
1854 case snd_soc_dapm_dac:
1855 case snd_soc_dapm_pga:
1856 case snd_soc_dapm_out_drv:
1857 case snd_soc_dapm_input:
1858 case snd_soc_dapm_output:
1859 case snd_soc_dapm_micbias:
1860 case snd_soc_dapm_vmid:
1861 case snd_soc_dapm_pre:
1862 case snd_soc_dapm_post:
1863 case snd_soc_dapm_supply:
1864 case snd_soc_dapm_aif_in:
1865 case snd_soc_dapm_aif_out:
1866 list_add(&path->list, &dapm->card->paths);
1867 list_add(&path->list_sink, &wsink->sources);
1868 list_add(&path->list_source, &wsource->sinks);
1871 case snd_soc_dapm_mux:
1872 case snd_soc_dapm_virt_mux:
1873 case snd_soc_dapm_value_mux:
1874 ret = dapm_connect_mux(dapm, wsource, wsink, path, control,
1875 &wsink->kcontrol_news[0]);
1879 case snd_soc_dapm_switch:
1880 case snd_soc_dapm_mixer:
1881 case snd_soc_dapm_mixer_named_ctl:
1882 ret = dapm_connect_mixer(dapm, wsource, wsink, path, control);
1886 case snd_soc_dapm_hp:
1887 case snd_soc_dapm_mic:
1888 case snd_soc_dapm_line:
1889 case snd_soc_dapm_spk:
1890 list_add(&path->list, &dapm->card->paths);
1891 list_add(&path->list_sink, &wsink->sources);
1892 list_add(&path->list_source, &wsource->sinks);
1899 dev_warn(dapm->dev, "asoc: no dapm match for %s --> %s --> %s\n",
1900 source, control, sink);
1906 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1907 * @dapm: DAPM context
1908 * @route: audio routes
1909 * @num: number of routes
1911 * Connects 2 dapm widgets together via a named audio path. The sink is
1912 * the widget receiving the audio signal, whilst the source is the sender
1913 * of the audio signal.
1915 * Returns 0 for success else error. On error all resources can be freed
1916 * with a call to snd_soc_card_free().
1918 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
1919 const struct snd_soc_dapm_route *route, int num)
1923 for (i = 0; i < num; i++) {
1924 ret = snd_soc_dapm_add_route(dapm, route);
1926 dev_err(dapm->dev, "Failed to add route %s->%s\n",
1927 route->source, route->sink);
1935 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
1937 static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm,
1938 const struct snd_soc_dapm_route *route)
1940 struct snd_soc_dapm_widget *source = dapm_find_widget(dapm,
1943 struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm,
1946 struct snd_soc_dapm_path *path;
1950 dev_err(dapm->dev, "Unable to find source %s for weak route\n",
1956 dev_err(dapm->dev, "Unable to find sink %s for weak route\n",
1961 if (route->control || route->connected)
1962 dev_warn(dapm->dev, "Ignoring control for weak route %s->%s\n",
1963 route->source, route->sink);
1965 list_for_each_entry(path, &source->sinks, list_source) {
1966 if (path->sink == sink) {
1973 dev_err(dapm->dev, "No path found for weak route %s->%s\n",
1974 route->source, route->sink);
1976 dev_warn(dapm->dev, "%d paths found for weak route %s->%s\n",
1977 count, route->source, route->sink);
1983 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
1984 * @dapm: DAPM context
1985 * @route: audio routes
1986 * @num: number of routes
1988 * Mark existing routes matching those specified in the passed array
1989 * as being weak, meaning that they are ignored for the purpose of
1990 * power decisions. The main intended use case is for sidetone paths
1991 * which couple audio between other independent paths if they are both
1992 * active in order to make the combination work better at the user
1993 * level but which aren't intended to be "used".
1995 * Note that CODEC drivers should not use this as sidetone type paths
1996 * can frequently also be used as bypass paths.
1998 int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm,
1999 const struct snd_soc_dapm_route *route, int num)
2004 for (i = 0; i < num; i++) {
2005 err = snd_soc_dapm_weak_route(dapm, route);
2013 EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes);
2016 * snd_soc_dapm_new_widgets - add new dapm widgets
2017 * @dapm: DAPM context
2019 * Checks the codec for any new dapm widgets and creates them if found.
2021 * Returns 0 for success.
2023 int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context *dapm)
2025 struct snd_soc_dapm_widget *w;
2028 list_for_each_entry(w, &dapm->card->widgets, list)
2033 if (w->num_kcontrols) {
2034 w->kcontrols = kzalloc(w->num_kcontrols *
2035 sizeof(struct snd_kcontrol *),
2042 case snd_soc_dapm_switch:
2043 case snd_soc_dapm_mixer:
2044 case snd_soc_dapm_mixer_named_ctl:
2045 w->power_check = dapm_generic_check_power;
2048 case snd_soc_dapm_mux:
2049 case snd_soc_dapm_virt_mux:
2050 case snd_soc_dapm_value_mux:
2051 w->power_check = dapm_generic_check_power;
2054 case snd_soc_dapm_adc:
2055 case snd_soc_dapm_aif_out:
2056 w->power_check = dapm_adc_check_power;
2058 case snd_soc_dapm_dac:
2059 case snd_soc_dapm_aif_in:
2060 w->power_check = dapm_dac_check_power;
2062 case snd_soc_dapm_pga:
2063 case snd_soc_dapm_out_drv:
2064 w->power_check = dapm_generic_check_power;
2067 case snd_soc_dapm_input:
2068 case snd_soc_dapm_output:
2069 case snd_soc_dapm_micbias:
2070 case snd_soc_dapm_spk:
2071 case snd_soc_dapm_hp:
2072 case snd_soc_dapm_mic:
2073 case snd_soc_dapm_line:
2074 w->power_check = dapm_generic_check_power;
2076 case snd_soc_dapm_supply:
2077 w->power_check = dapm_supply_check_power;
2078 case snd_soc_dapm_vmid:
2079 case snd_soc_dapm_pre:
2080 case snd_soc_dapm_post:
2084 /* Read the initial power state from the device */
2086 val = soc_widget_read(w, w->reg);
2087 val &= 1 << w->shift;
2097 dapm_debugfs_add_widget(w);
2100 dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
2103 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
2106 * snd_soc_dapm_get_volsw - dapm mixer get callback
2107 * @kcontrol: mixer control
2108 * @ucontrol: control element information
2110 * Callback to get the value of a dapm mixer control.
2112 * Returns 0 for success.
2114 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
2115 struct snd_ctl_elem_value *ucontrol)
2117 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2118 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2119 struct soc_mixer_control *mc =
2120 (struct soc_mixer_control *)kcontrol->private_value;
2121 unsigned int reg = mc->reg;
2122 unsigned int shift = mc->shift;
2123 unsigned int rshift = mc->rshift;
2125 unsigned int invert = mc->invert;
2126 unsigned int mask = (1 << fls(max)) - 1;
2128 ucontrol->value.integer.value[0] =
2129 (snd_soc_read(widget->codec, reg) >> shift) & mask;
2130 if (shift != rshift)
2131 ucontrol->value.integer.value[1] =
2132 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
2134 ucontrol->value.integer.value[0] =
2135 max - ucontrol->value.integer.value[0];
2136 if (shift != rshift)
2137 ucontrol->value.integer.value[1] =
2138 max - ucontrol->value.integer.value[1];
2143 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
2146 * snd_soc_dapm_put_volsw - dapm mixer set callback
2147 * @kcontrol: mixer control
2148 * @ucontrol: control element information
2150 * Callback to set the value of a dapm mixer control.
2152 * Returns 0 for success.
2154 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
2155 struct snd_ctl_elem_value *ucontrol)
2157 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2158 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2159 struct snd_soc_codec *codec = widget->codec;
2160 struct soc_mixer_control *mc =
2161 (struct soc_mixer_control *)kcontrol->private_value;
2162 unsigned int reg = mc->reg;
2163 unsigned int shift = mc->shift;
2165 unsigned int mask = (1 << fls(max)) - 1;
2166 unsigned int invert = mc->invert;
2168 int connect, change;
2169 struct snd_soc_dapm_update update;
2172 val = (ucontrol->value.integer.value[0] & mask);
2176 mask = mask << shift;
2180 /* new connection */
2181 connect = invert ? 0 : 1;
2183 /* old connection must be powered down */
2184 connect = invert ? 1 : 0;
2186 mutex_lock(&codec->mutex);
2188 change = snd_soc_test_bits(widget->codec, reg, mask, val);
2190 for (wi = 0; wi < wlist->num_widgets; wi++) {
2191 widget = wlist->widgets[wi];
2193 widget->value = val;
2195 update.kcontrol = kcontrol;
2196 update.widget = widget;
2200 widget->dapm->update = &update;
2202 dapm_mixer_update_power(widget, kcontrol, connect);
2204 widget->dapm->update = NULL;
2208 mutex_unlock(&codec->mutex);
2211 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
2214 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
2215 * @kcontrol: mixer control
2216 * @ucontrol: control element information
2218 * Callback to get the value of a dapm enumerated double mixer control.
2220 * Returns 0 for success.
2222 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
2223 struct snd_ctl_elem_value *ucontrol)
2225 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2226 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2227 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2228 unsigned int val, bitmask;
2230 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2232 val = snd_soc_read(widget->codec, e->reg);
2233 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
2234 if (e->shift_l != e->shift_r)
2235 ucontrol->value.enumerated.item[1] =
2236 (val >> e->shift_r) & (bitmask - 1);
2240 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
2243 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
2244 * @kcontrol: mixer control
2245 * @ucontrol: control element information
2247 * Callback to set the value of a dapm enumerated double mixer control.
2249 * Returns 0 for success.
2251 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
2252 struct snd_ctl_elem_value *ucontrol)
2254 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2255 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2256 struct snd_soc_codec *codec = widget->codec;
2257 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2258 unsigned int val, mux, change;
2259 unsigned int mask, bitmask;
2260 struct snd_soc_dapm_update update;
2263 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2265 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2267 mux = ucontrol->value.enumerated.item[0];
2268 val = mux << e->shift_l;
2269 mask = (bitmask - 1) << e->shift_l;
2270 if (e->shift_l != e->shift_r) {
2271 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2273 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2274 mask |= (bitmask - 1) << e->shift_r;
2277 mutex_lock(&codec->mutex);
2279 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2281 for (wi = 0; wi < wlist->num_widgets; wi++) {
2282 widget = wlist->widgets[wi];
2284 widget->value = val;
2286 update.kcontrol = kcontrol;
2287 update.widget = widget;
2288 update.reg = e->reg;
2291 widget->dapm->update = &update;
2293 dapm_mux_update_power(widget, kcontrol, change, mux, e);
2295 widget->dapm->update = NULL;
2299 mutex_unlock(&codec->mutex);
2302 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
2305 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
2306 * @kcontrol: mixer control
2307 * @ucontrol: control element information
2309 * Returns 0 for success.
2311 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
2312 struct snd_ctl_elem_value *ucontrol)
2314 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2315 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2317 ucontrol->value.enumerated.item[0] = widget->value;
2321 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt);
2324 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
2325 * @kcontrol: mixer control
2326 * @ucontrol: control element information
2328 * Returns 0 for success.
2330 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
2331 struct snd_ctl_elem_value *ucontrol)
2333 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2334 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2335 struct snd_soc_codec *codec = widget->codec;
2336 struct soc_enum *e =
2337 (struct soc_enum *)kcontrol->private_value;
2342 if (ucontrol->value.enumerated.item[0] >= e->max)
2345 mutex_lock(&codec->mutex);
2347 change = widget->value != ucontrol->value.enumerated.item[0];
2349 for (wi = 0; wi < wlist->num_widgets; wi++) {
2350 widget = wlist->widgets[wi];
2352 widget->value = ucontrol->value.enumerated.item[0];
2354 dapm_mux_update_power(widget, kcontrol, change,
2359 mutex_unlock(&codec->mutex);
2362 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt);
2365 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
2367 * @kcontrol: mixer control
2368 * @ucontrol: control element information
2370 * Callback to get the value of a dapm semi enumerated double mixer control.
2372 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2373 * used for handling bitfield coded enumeration for example.
2375 * Returns 0 for success.
2377 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
2378 struct snd_ctl_elem_value *ucontrol)
2380 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2381 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2382 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2383 unsigned int reg_val, val, mux;
2385 reg_val = snd_soc_read(widget->codec, e->reg);
2386 val = (reg_val >> e->shift_l) & e->mask;
2387 for (mux = 0; mux < e->max; mux++) {
2388 if (val == e->values[mux])
2391 ucontrol->value.enumerated.item[0] = mux;
2392 if (e->shift_l != e->shift_r) {
2393 val = (reg_val >> e->shift_r) & e->mask;
2394 for (mux = 0; mux < e->max; mux++) {
2395 if (val == e->values[mux])
2398 ucontrol->value.enumerated.item[1] = mux;
2403 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
2406 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
2408 * @kcontrol: mixer control
2409 * @ucontrol: control element information
2411 * Callback to set the value of a dapm semi enumerated double mixer control.
2413 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2414 * used for handling bitfield coded enumeration for example.
2416 * Returns 0 for success.
2418 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
2419 struct snd_ctl_elem_value *ucontrol)
2421 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2422 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2423 struct snd_soc_codec *codec = widget->codec;
2424 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2425 unsigned int val, mux, change;
2427 struct snd_soc_dapm_update update;
2430 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2432 mux = ucontrol->value.enumerated.item[0];
2433 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2434 mask = e->mask << e->shift_l;
2435 if (e->shift_l != e->shift_r) {
2436 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2438 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2439 mask |= e->mask << e->shift_r;
2442 mutex_lock(&codec->mutex);
2444 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2446 for (wi = 0; wi < wlist->num_widgets; wi++) {
2447 widget = wlist->widgets[wi];
2449 widget->value = val;
2451 update.kcontrol = kcontrol;
2452 update.widget = widget;
2453 update.reg = e->reg;
2456 widget->dapm->update = &update;
2458 dapm_mux_update_power(widget, kcontrol, change, mux, e);
2460 widget->dapm->update = NULL;
2464 mutex_unlock(&codec->mutex);
2467 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
2470 * snd_soc_dapm_info_pin_switch - Info for a pin switch
2472 * @kcontrol: mixer control
2473 * @uinfo: control element information
2475 * Callback to provide information about a pin switch control.
2477 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
2478 struct snd_ctl_elem_info *uinfo)
2480 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2482 uinfo->value.integer.min = 0;
2483 uinfo->value.integer.max = 1;
2487 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
2490 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
2492 * @kcontrol: mixer control
2495 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
2496 struct snd_ctl_elem_value *ucontrol)
2498 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2499 const char *pin = (const char *)kcontrol->private_value;
2501 mutex_lock(&codec->mutex);
2503 ucontrol->value.integer.value[0] =
2504 snd_soc_dapm_get_pin_status(&codec->dapm, pin);
2506 mutex_unlock(&codec->mutex);
2510 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
2513 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
2515 * @kcontrol: mixer control
2518 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
2519 struct snd_ctl_elem_value *ucontrol)
2521 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2522 const char *pin = (const char *)kcontrol->private_value;
2524 mutex_lock(&codec->mutex);
2526 if (ucontrol->value.integer.value[0])
2527 snd_soc_dapm_enable_pin(&codec->dapm, pin);
2529 snd_soc_dapm_disable_pin(&codec->dapm, pin);
2531 snd_soc_dapm_sync(&codec->dapm);
2533 mutex_unlock(&codec->mutex);
2537 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
2540 * snd_soc_dapm_new_control - create new dapm control
2541 * @dapm: DAPM context
2542 * @widget: widget template
2544 * Creates a new dapm control based upon the template.
2546 * Returns 0 for success else error.
2548 int snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
2549 const struct snd_soc_dapm_widget *widget)
2551 struct snd_soc_dapm_widget *w;
2554 if ((w = dapm_cnew_widget(widget)) == NULL)
2557 name_len = strlen(widget->name) + 1;
2558 if (dapm->codec && dapm->codec->name_prefix)
2559 name_len += 1 + strlen(dapm->codec->name_prefix);
2560 w->name = kmalloc(name_len, GFP_KERNEL);
2561 if (w->name == NULL) {
2565 if (dapm->codec && dapm->codec->name_prefix)
2566 snprintf(w->name, name_len, "%s %s",
2567 dapm->codec->name_prefix, widget->name);
2569 snprintf(w->name, name_len, "%s", widget->name);
2573 w->codec = dapm->codec;
2574 w->platform = dapm->platform;
2575 INIT_LIST_HEAD(&w->sources);
2576 INIT_LIST_HEAD(&w->sinks);
2577 INIT_LIST_HEAD(&w->list);
2578 list_add(&w->list, &dapm->card->widgets);
2580 /* machine layer set ups unconnected pins and insertions */
2584 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
2587 * snd_soc_dapm_new_controls - create new dapm controls
2588 * @dapm: DAPM context
2589 * @widget: widget array
2590 * @num: number of widgets
2592 * Creates new DAPM controls based upon the templates.
2594 * Returns 0 for success else error.
2596 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
2597 const struct snd_soc_dapm_widget *widget,
2602 for (i = 0; i < num; i++) {
2603 ret = snd_soc_dapm_new_control(dapm, widget);
2606 "ASoC: Failed to create DAPM control %s: %d\n",
2614 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
2616 static void soc_dapm_stream_event(struct snd_soc_dapm_context *dapm,
2617 const char *stream, int event)
2619 struct snd_soc_dapm_widget *w;
2621 list_for_each_entry(w, &dapm->card->widgets, list)
2623 if (!w->sname || w->dapm != dapm)
2625 dev_vdbg(w->dapm->dev, "widget %s\n %s stream %s event %d\n",
2626 w->name, w->sname, stream, event);
2627 if (strstr(w->sname, stream)) {
2629 case SND_SOC_DAPM_STREAM_START:
2632 case SND_SOC_DAPM_STREAM_STOP:
2635 case SND_SOC_DAPM_STREAM_SUSPEND:
2636 case SND_SOC_DAPM_STREAM_RESUME:
2637 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
2638 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
2644 dapm_power_widgets(dapm, event);
2646 /* do we need to notify any clients that DAPM stream is complete */
2647 if (dapm->stream_event)
2648 dapm->stream_event(dapm, event);
2652 * snd_soc_dapm_stream_event - send a stream event to the dapm core
2653 * @rtd: PCM runtime data
2654 * @stream: stream name
2655 * @event: stream event
2657 * Sends a stream event to the dapm core. The core then makes any
2658 * necessary widget power changes.
2660 * Returns 0 for success else error.
2662 int snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd,
2663 const char *stream, int event)
2665 struct snd_soc_codec *codec = rtd->codec;
2670 mutex_lock(&codec->mutex);
2671 soc_dapm_stream_event(&codec->dapm, stream, event);
2672 mutex_unlock(&codec->mutex);
2677 * snd_soc_dapm_enable_pin - enable pin.
2678 * @dapm: DAPM context
2681 * Enables input/output pin and its parents or children widgets iff there is
2682 * a valid audio route and active audio stream.
2683 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2684 * do any widget power switching.
2686 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
2688 return snd_soc_dapm_set_pin(dapm, pin, 1);
2690 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
2693 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
2694 * @dapm: DAPM context
2697 * Enables input/output pin regardless of any other state. This is
2698 * intended for use with microphone bias supplies used in microphone
2701 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2702 * do any widget power switching.
2704 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
2707 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2710 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
2714 dev_dbg(w->dapm->dev, "dapm: force enable pin %s\n", pin);
2720 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
2723 * snd_soc_dapm_disable_pin - disable pin.
2724 * @dapm: DAPM context
2727 * Disables input/output pin and its parents or children widgets.
2728 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2729 * do any widget power switching.
2731 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
2734 return snd_soc_dapm_set_pin(dapm, pin, 0);
2736 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
2739 * snd_soc_dapm_nc_pin - permanently disable pin.
2740 * @dapm: DAPM context
2743 * Marks the specified pin as being not connected, disabling it along
2744 * any parent or child widgets. At present this is identical to
2745 * snd_soc_dapm_disable_pin() but in future it will be extended to do
2746 * additional things such as disabling controls which only affect
2747 * paths through the pin.
2749 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2750 * do any widget power switching.
2752 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
2754 return snd_soc_dapm_set_pin(dapm, pin, 0);
2756 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
2759 * snd_soc_dapm_get_pin_status - get audio pin status
2760 * @dapm: DAPM context
2761 * @pin: audio signal pin endpoint (or start point)
2763 * Get audio pin status - connected or disconnected.
2765 * Returns 1 for connected otherwise 0.
2767 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
2770 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2773 return w->connected;
2777 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
2780 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
2781 * @dapm: DAPM context
2782 * @pin: audio signal pin endpoint (or start point)
2784 * Mark the given endpoint or pin as ignoring suspend. When the
2785 * system is disabled a path between two endpoints flagged as ignoring
2786 * suspend will not be disabled. The path must already be enabled via
2787 * normal means at suspend time, it will not be turned on if it was not
2790 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
2793 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
2796 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
2800 w->ignore_suspend = 1;
2804 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
2807 * snd_soc_dapm_free - free dapm resources
2808 * @dapm: DAPM context
2810 * Free all dapm widgets and resources.
2812 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
2814 snd_soc_dapm_sys_remove(dapm->dev);
2815 dapm_debugfs_cleanup(dapm);
2816 dapm_free_widgets(dapm);
2817 list_del(&dapm->list);
2819 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
2821 static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context *dapm)
2823 struct snd_soc_dapm_widget *w;
2824 LIST_HEAD(down_list);
2827 list_for_each_entry(w, &dapm->card->widgets, list) {
2828 if (w->dapm != dapm)
2831 dapm_seq_insert(w, &down_list, false);
2837 /* If there were no widgets to power down we're already in
2841 snd_soc_dapm_set_bias_level(dapm, SND_SOC_BIAS_PREPARE);
2842 dapm_seq_run(dapm, &down_list, 0, false);
2843 snd_soc_dapm_set_bias_level(dapm, SND_SOC_BIAS_STANDBY);
2848 * snd_soc_dapm_shutdown - callback for system shutdown
2850 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
2852 struct snd_soc_codec *codec;
2854 list_for_each_entry(codec, &card->codec_dev_list, list) {
2855 soc_dapm_shutdown_codec(&codec->dapm);
2856 snd_soc_dapm_set_bias_level(&codec->dapm, SND_SOC_BIAS_OFF);
2860 /* Module information */
2861 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2862 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
2863 MODULE_LICENSE("GPL");