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 static bool dapm_dirty_widget(struct snd_soc_dapm_widget *w)
124 return !list_empty(&w->dirty);
127 static void dapm_mark_dirty(struct snd_soc_dapm_widget *w)
129 if (!dapm_dirty_widget(w))
130 list_add_tail(&w->dirty, &w->dapm->card->dapm_dirty);
133 /* create a new dapm widget */
134 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
135 const struct snd_soc_dapm_widget *_widget)
137 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
140 /* get snd_card from DAPM context */
141 static inline struct snd_card *dapm_get_snd_card(
142 struct snd_soc_dapm_context *dapm)
145 return dapm->codec->card->snd_card;
146 else if (dapm->platform)
147 return dapm->platform->card->snd_card;
155 /* get soc_card from DAPM context */
156 static inline struct snd_soc_card *dapm_get_soc_card(
157 struct snd_soc_dapm_context *dapm)
160 return dapm->codec->card;
161 else if (dapm->platform)
162 return dapm->platform->card;
170 static int soc_widget_read(struct snd_soc_dapm_widget *w, int reg)
173 return snd_soc_read(w->codec, reg);
174 else if (w->platform)
175 return snd_soc_platform_read(w->platform, reg);
177 dev_err(w->dapm->dev, "no valid widget read method\n");
181 static int soc_widget_write(struct snd_soc_dapm_widget *w, int reg, int val)
184 return snd_soc_write(w->codec, reg, val);
185 else if (w->platform)
186 return snd_soc_platform_write(w->platform, reg, val);
188 dev_err(w->dapm->dev, "no valid widget write method\n");
192 static int soc_widget_update_bits(struct snd_soc_dapm_widget *w,
193 unsigned short reg, unsigned int mask, unsigned int value)
196 unsigned int old, new;
199 ret = soc_widget_read(w, reg);
204 new = (old & ~mask) | (value & mask);
207 ret = soc_widget_write(w, reg, new);
216 * snd_soc_dapm_set_bias_level - set the bias level for the system
217 * @dapm: DAPM context
218 * @level: level to configure
220 * Configure the bias (power) levels for the SoC audio device.
222 * Returns 0 for success else error.
224 static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm,
225 enum snd_soc_bias_level level)
227 struct snd_soc_card *card = dapm->card;
230 trace_snd_soc_bias_level_start(card, level);
232 if (card && card->set_bias_level)
233 ret = card->set_bias_level(card, dapm, level);
238 if (dapm->codec->driver->set_bias_level)
239 ret = dapm->codec->driver->set_bias_level(dapm->codec,
242 dapm->bias_level = level;
247 if (card && card->set_bias_level_post)
248 ret = card->set_bias_level_post(card, dapm, level);
250 trace_snd_soc_bias_level_done(card, level);
255 /* set up initial codec paths */
256 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
257 struct snd_soc_dapm_path *p, int i)
260 case snd_soc_dapm_switch:
261 case snd_soc_dapm_mixer:
262 case snd_soc_dapm_mixer_named_ctl: {
264 struct soc_mixer_control *mc = (struct soc_mixer_control *)
265 w->kcontrol_news[i].private_value;
266 unsigned int reg = mc->reg;
267 unsigned int shift = mc->shift;
269 unsigned int mask = (1 << fls(max)) - 1;
270 unsigned int invert = mc->invert;
272 val = soc_widget_read(w, reg);
273 val = (val >> shift) & mask;
275 if ((invert && !val) || (!invert && val))
281 case snd_soc_dapm_mux: {
282 struct soc_enum *e = (struct soc_enum *)
283 w->kcontrol_news[i].private_value;
284 int val, item, bitmask;
286 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
288 val = soc_widget_read(w, e->reg);
289 item = (val >> e->shift_l) & (bitmask - 1);
292 for (i = 0; i < e->max; i++) {
293 if (!(strcmp(p->name, e->texts[i])) && item == i)
298 case snd_soc_dapm_virt_mux: {
299 struct soc_enum *e = (struct soc_enum *)
300 w->kcontrol_news[i].private_value;
303 /* since a virtual mux has no backing registers to
304 * decide which path to connect, it will try to match
305 * with the first enumeration. This is to ensure
306 * that the default mux choice (the first) will be
307 * correctly powered up during initialization.
309 if (!strcmp(p->name, e->texts[0]))
313 case snd_soc_dapm_value_mux: {
314 struct soc_enum *e = (struct soc_enum *)
315 w->kcontrol_news[i].private_value;
318 val = soc_widget_read(w, e->reg);
319 val = (val >> e->shift_l) & e->mask;
320 for (item = 0; item < e->max; item++) {
321 if (val == e->values[item])
326 for (i = 0; i < e->max; i++) {
327 if (!(strcmp(p->name, e->texts[i])) && item == i)
332 /* does not affect routing - always connected */
333 case snd_soc_dapm_pga:
334 case snd_soc_dapm_out_drv:
335 case snd_soc_dapm_output:
336 case snd_soc_dapm_adc:
337 case snd_soc_dapm_input:
338 case snd_soc_dapm_dac:
339 case snd_soc_dapm_micbias:
340 case snd_soc_dapm_vmid:
341 case snd_soc_dapm_supply:
342 case snd_soc_dapm_aif_in:
343 case snd_soc_dapm_aif_out:
344 case snd_soc_dapm_hp:
345 case snd_soc_dapm_mic:
346 case snd_soc_dapm_spk:
347 case snd_soc_dapm_line:
350 /* does affect routing - dynamically connected */
351 case snd_soc_dapm_pre:
352 case snd_soc_dapm_post:
358 /* connect mux widget to its interconnecting audio paths */
359 static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
360 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
361 struct snd_soc_dapm_path *path, const char *control_name,
362 const struct snd_kcontrol_new *kcontrol)
364 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
367 for (i = 0; i < e->max; i++) {
368 if (!(strcmp(control_name, e->texts[i]))) {
369 list_add(&path->list, &dapm->card->paths);
370 list_add(&path->list_sink, &dest->sources);
371 list_add(&path->list_source, &src->sinks);
372 path->name = (char*)e->texts[i];
373 dapm_set_path_status(dest, path, 0);
381 /* connect mixer widget to its interconnecting audio paths */
382 static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
383 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
384 struct snd_soc_dapm_path *path, const char *control_name)
388 /* search for mixer kcontrol */
389 for (i = 0; i < dest->num_kcontrols; i++) {
390 if (!strcmp(control_name, dest->kcontrol_news[i].name)) {
391 list_add(&path->list, &dapm->card->paths);
392 list_add(&path->list_sink, &dest->sources);
393 list_add(&path->list_source, &src->sinks);
394 path->name = dest->kcontrol_news[i].name;
395 dapm_set_path_status(dest, path, i);
402 static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm,
403 struct snd_soc_dapm_widget *kcontrolw,
404 const struct snd_kcontrol_new *kcontrol_new,
405 struct snd_kcontrol **kcontrol)
407 struct snd_soc_dapm_widget *w;
412 list_for_each_entry(w, &dapm->card->widgets, list) {
413 if (w == kcontrolw || w->dapm != kcontrolw->dapm)
415 for (i = 0; i < w->num_kcontrols; i++) {
416 if (&w->kcontrol_news[i] == kcontrol_new) {
418 *kcontrol = w->kcontrols[i];
427 /* create new dapm mixer control */
428 static int dapm_new_mixer(struct snd_soc_dapm_widget *w)
430 struct snd_soc_dapm_context *dapm = w->dapm;
432 size_t name_len, prefix_len;
433 struct snd_soc_dapm_path *path;
434 struct snd_card *card = dapm->card->snd_card;
436 struct snd_soc_dapm_widget_list *wlist;
440 prefix = dapm->codec->name_prefix;
445 prefix_len = strlen(prefix) + 1;
450 for (i = 0; i < w->num_kcontrols; i++) {
453 list_for_each_entry(path, &w->sources, list_sink) {
455 /* mixer/mux paths name must match control name */
456 if (path->name != (char *)w->kcontrol_news[i].name)
459 if (w->kcontrols[i]) {
460 path->kcontrol = w->kcontrols[i];
464 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
465 sizeof(struct snd_soc_dapm_widget *),
466 wlist = kzalloc(wlistsize, GFP_KERNEL);
469 "asoc: can't allocate widget list for %s\n",
473 wlist->num_widgets = 1;
474 wlist->widgets[0] = w;
476 /* add dapm control with long name.
477 * for dapm_mixer this is the concatenation of the
478 * mixer and kcontrol name.
479 * for dapm_mixer_named_ctl this is simply the
482 name_len = strlen(w->kcontrol_news[i].name) + 1;
483 if (w->id != snd_soc_dapm_mixer_named_ctl)
484 name_len += 1 + strlen(w->name);
486 path->long_name = kmalloc(name_len, GFP_KERNEL);
488 if (path->long_name == NULL) {
495 /* The control will get a prefix from
496 * the control creation process but
497 * we're also using the same prefix
498 * for widgets so cut the prefix off
499 * the front of the widget name.
501 snprintf(path->long_name, name_len, "%s %s",
502 w->name + prefix_len,
503 w->kcontrol_news[i].name);
505 case snd_soc_dapm_mixer_named_ctl:
506 snprintf(path->long_name, name_len, "%s",
507 w->kcontrol_news[i].name);
511 path->long_name[name_len - 1] = '\0';
513 path->kcontrol = snd_soc_cnew(&w->kcontrol_news[i],
514 wlist, path->long_name,
516 ret = snd_ctl_add(card, path->kcontrol);
519 "asoc: failed to add dapm kcontrol %s: %d\n",
520 path->long_name, ret);
522 kfree(path->long_name);
523 path->long_name = NULL;
526 w->kcontrols[i] = path->kcontrol;
532 /* create new dapm mux control */
533 static int dapm_new_mux(struct snd_soc_dapm_widget *w)
535 struct snd_soc_dapm_context *dapm = w->dapm;
536 struct snd_soc_dapm_path *path = NULL;
537 struct snd_kcontrol *kcontrol;
538 struct snd_card *card = dapm->card->snd_card;
542 struct snd_soc_dapm_widget_list *wlist;
543 int shared, wlistentries;
547 if (w->num_kcontrols != 1) {
549 "asoc: mux %s has incorrect number of controls\n",
554 shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[0],
557 wlist = kcontrol->private_data;
558 wlistentries = wlist->num_widgets + 1;
563 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
564 wlistentries * sizeof(struct snd_soc_dapm_widget *),
565 wlist = krealloc(wlist, wlistsize, GFP_KERNEL);
568 "asoc: can't allocate widget list for %s\n", w->name);
571 wlist->num_widgets = wlistentries;
572 wlist->widgets[wlistentries - 1] = w;
576 prefix = dapm->codec->name_prefix;
581 name = w->kcontrol_news[0].name;
586 prefix_len = strlen(prefix) + 1;
592 * The control will get a prefix from the control creation
593 * process but we're also using the same prefix for widgets so
594 * cut the prefix off the front of the widget name.
596 kcontrol = snd_soc_cnew(&w->kcontrol_news[0], wlist,
597 name + prefix_len, prefix);
598 ret = snd_ctl_add(card, kcontrol);
600 dev_err(dapm->dev, "failed to add kcontrol %s: %d\n",
607 kcontrol->private_data = wlist;
609 w->kcontrols[0] = kcontrol;
611 list_for_each_entry(path, &w->sources, list_sink)
612 path->kcontrol = kcontrol;
617 /* create new dapm volume control */
618 static int dapm_new_pga(struct snd_soc_dapm_widget *w)
620 if (w->num_kcontrols)
621 dev_err(w->dapm->dev,
622 "asoc: PGA controls not supported: '%s'\n", w->name);
627 /* reset 'walked' bit for each dapm path */
628 static inline void dapm_clear_walk(struct snd_soc_dapm_context *dapm)
630 struct snd_soc_dapm_path *p;
632 list_for_each_entry(p, &dapm->card->paths, list)
636 /* We implement power down on suspend by checking the power state of
637 * the ALSA card - when we are suspending the ALSA state for the card
640 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
642 int level = snd_power_get_state(widget->dapm->card->snd_card);
645 case SNDRV_CTL_POWER_D3hot:
646 case SNDRV_CTL_POWER_D3cold:
647 if (widget->ignore_suspend)
648 dev_dbg(widget->dapm->dev, "%s ignoring suspend\n",
650 return widget->ignore_suspend;
657 * Recursively check for a completed path to an active or physically connected
658 * output widget. Returns number of complete paths.
660 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
662 struct snd_soc_dapm_path *path;
665 DAPM_UPDATE_STAT(widget, path_checks);
667 if (widget->id == snd_soc_dapm_supply)
670 switch (widget->id) {
671 case snd_soc_dapm_adc:
672 case snd_soc_dapm_aif_out:
674 return snd_soc_dapm_suspend_check(widget);
679 if (widget->connected) {
680 /* connected pin ? */
681 if (widget->id == snd_soc_dapm_output && !widget->ext)
682 return snd_soc_dapm_suspend_check(widget);
684 /* connected jack or spk ? */
685 if (widget->id == snd_soc_dapm_hp || widget->id == snd_soc_dapm_spk ||
686 (widget->id == snd_soc_dapm_line && !list_empty(&widget->sources)))
687 return snd_soc_dapm_suspend_check(widget);
690 list_for_each_entry(path, &widget->sinks, list_source) {
691 DAPM_UPDATE_STAT(widget, neighbour_checks);
699 if (path->sink && path->connect) {
701 con += is_connected_output_ep(path->sink);
709 * Recursively check for a completed path to an active or physically connected
710 * input widget. Returns number of complete paths.
712 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
714 struct snd_soc_dapm_path *path;
717 DAPM_UPDATE_STAT(widget, path_checks);
719 if (widget->id == snd_soc_dapm_supply)
722 /* active stream ? */
723 switch (widget->id) {
724 case snd_soc_dapm_dac:
725 case snd_soc_dapm_aif_in:
727 return snd_soc_dapm_suspend_check(widget);
732 if (widget->connected) {
733 /* connected pin ? */
734 if (widget->id == snd_soc_dapm_input && !widget->ext)
735 return snd_soc_dapm_suspend_check(widget);
737 /* connected VMID/Bias for lower pops */
738 if (widget->id == snd_soc_dapm_vmid)
739 return snd_soc_dapm_suspend_check(widget);
741 /* connected jack ? */
742 if (widget->id == snd_soc_dapm_mic ||
743 (widget->id == snd_soc_dapm_line && !list_empty(&widget->sinks)))
744 return snd_soc_dapm_suspend_check(widget);
747 list_for_each_entry(path, &widget->sources, list_sink) {
748 DAPM_UPDATE_STAT(widget, neighbour_checks);
756 if (path->source && path->connect) {
758 con += is_connected_input_ep(path->source);
766 * Handler for generic register modifier widget.
768 int dapm_reg_event(struct snd_soc_dapm_widget *w,
769 struct snd_kcontrol *kcontrol, int event)
773 if (SND_SOC_DAPM_EVENT_ON(event))
778 soc_widget_update_bits(w, -(w->reg + 1),
779 w->mask << w->shift, val << w->shift);
783 EXPORT_SYMBOL_GPL(dapm_reg_event);
785 static int dapm_widget_power_check(struct snd_soc_dapm_widget *w)
790 return w->power_check(w);
793 /* Generic check to see if a widget should be powered.
795 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
799 DAPM_UPDATE_STAT(w, power_checks);
801 in = is_connected_input_ep(w);
802 dapm_clear_walk(w->dapm);
803 out = is_connected_output_ep(w);
804 dapm_clear_walk(w->dapm);
805 return out != 0 && in != 0;
808 /* Check to see if an ADC has power */
809 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
813 DAPM_UPDATE_STAT(w, power_checks);
816 in = is_connected_input_ep(w);
817 dapm_clear_walk(w->dapm);
820 return dapm_generic_check_power(w);
824 /* Check to see if a DAC has power */
825 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
829 DAPM_UPDATE_STAT(w, power_checks);
832 out = is_connected_output_ep(w);
833 dapm_clear_walk(w->dapm);
836 return dapm_generic_check_power(w);
840 /* Check to see if a power supply is needed */
841 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
843 struct snd_soc_dapm_path *path;
846 DAPM_UPDATE_STAT(w, power_checks);
848 /* Check if one of our outputs is connected */
849 list_for_each_entry(path, &w->sinks, list_source) {
850 DAPM_UPDATE_STAT(w, neighbour_checks);
855 if (path->connected &&
856 !path->connected(path->source, path->sink))
862 if (dapm_widget_power_check(path->sink)) {
868 dapm_clear_walk(w->dapm);
873 static int dapm_always_on_check_power(struct snd_soc_dapm_widget *w)
878 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
879 struct snd_soc_dapm_widget *b,
887 sort = dapm_down_seq;
889 if (sort[a->id] != sort[b->id])
890 return sort[a->id] - sort[b->id];
891 if (a->subseq != b->subseq) {
893 return a->subseq - b->subseq;
895 return b->subseq - a->subseq;
897 if (a->reg != b->reg)
898 return a->reg - b->reg;
899 if (a->dapm != b->dapm)
900 return (unsigned long)a->dapm - (unsigned long)b->dapm;
905 /* Insert a widget in order into a DAPM power sequence. */
906 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
907 struct list_head *list,
910 struct snd_soc_dapm_widget *w;
912 list_for_each_entry(w, list, power_list)
913 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
914 list_add_tail(&new_widget->power_list, &w->power_list);
918 list_add_tail(&new_widget->power_list, list);
921 static void dapm_seq_check_event(struct snd_soc_dapm_context *dapm,
922 struct snd_soc_dapm_widget *w, int event)
924 struct snd_soc_card *card = dapm->card;
929 case SND_SOC_DAPM_PRE_PMU:
933 case SND_SOC_DAPM_POST_PMU:
934 ev_name = "POST_PMU";
937 case SND_SOC_DAPM_PRE_PMD:
941 case SND_SOC_DAPM_POST_PMD:
942 ev_name = "POST_PMD";
950 if (w->power != power)
953 if (w->event && (w->event_flags & event)) {
954 pop_dbg(dapm->dev, card->pop_time, "pop test : %s %s\n",
956 trace_snd_soc_dapm_widget_event_start(w, event);
957 ret = w->event(w, NULL, event);
958 trace_snd_soc_dapm_widget_event_done(w, event);
960 pr_err("%s: %s event failed: %d\n",
961 ev_name, w->name, ret);
965 /* Apply the coalesced changes from a DAPM sequence */
966 static void dapm_seq_run_coalesced(struct snd_soc_dapm_context *dapm,
967 struct list_head *pending)
969 struct snd_soc_card *card = dapm->card;
970 struct snd_soc_dapm_widget *w;
972 unsigned int value = 0;
973 unsigned int mask = 0;
974 unsigned int cur_mask;
976 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
979 list_for_each_entry(w, pending, power_list) {
980 cur_mask = 1 << w->shift;
981 BUG_ON(reg != w->reg);
992 pop_dbg(dapm->dev, card->pop_time,
993 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
994 w->name, reg, value, mask);
996 /* Check for events */
997 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMU);
998 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMD);
1002 /* Any widget will do, they should all be updating the
1005 w = list_first_entry(pending, struct snd_soc_dapm_widget,
1008 pop_dbg(dapm->dev, card->pop_time,
1009 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
1010 value, mask, reg, card->pop_time);
1011 pop_wait(card->pop_time);
1012 soc_widget_update_bits(w, reg, mask, value);
1015 list_for_each_entry(w, pending, power_list) {
1016 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMU);
1017 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMD);
1021 /* Apply a DAPM power sequence.
1023 * We walk over a pre-sorted list of widgets to apply power to. In
1024 * order to minimise the number of writes to the device required
1025 * multiple widgets will be updated in a single write where possible.
1026 * Currently anything that requires more than a single write is not
1029 static void dapm_seq_run(struct snd_soc_dapm_context *dapm,
1030 struct list_head *list, int event, bool power_up)
1032 struct snd_soc_dapm_widget *w, *n;
1035 int cur_subseq = -1;
1036 int cur_reg = SND_SOC_NOPM;
1037 struct snd_soc_dapm_context *cur_dapm = NULL;
1044 sort = dapm_down_seq;
1046 list_for_each_entry_safe(w, n, list, power_list) {
1049 /* Do we need to apply any queued changes? */
1050 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
1051 w->dapm != cur_dapm || w->subseq != cur_subseq) {
1052 if (!list_empty(&pending))
1053 dapm_seq_run_coalesced(cur_dapm, &pending);
1055 if (cur_dapm && cur_dapm->seq_notifier) {
1056 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1057 if (sort[i] == cur_sort)
1058 cur_dapm->seq_notifier(cur_dapm,
1063 INIT_LIST_HEAD(&pending);
1065 cur_subseq = INT_MIN;
1066 cur_reg = SND_SOC_NOPM;
1071 case snd_soc_dapm_pre:
1073 list_for_each_entry_safe_continue(w, n, list,
1076 if (event == SND_SOC_DAPM_STREAM_START)
1078 NULL, SND_SOC_DAPM_PRE_PMU);
1079 else if (event == SND_SOC_DAPM_STREAM_STOP)
1081 NULL, SND_SOC_DAPM_PRE_PMD);
1084 case snd_soc_dapm_post:
1086 list_for_each_entry_safe_continue(w, n, list,
1089 if (event == SND_SOC_DAPM_STREAM_START)
1091 NULL, SND_SOC_DAPM_POST_PMU);
1092 else if (event == SND_SOC_DAPM_STREAM_STOP)
1094 NULL, SND_SOC_DAPM_POST_PMD);
1098 /* Queue it up for application */
1099 cur_sort = sort[w->id];
1100 cur_subseq = w->subseq;
1103 list_move(&w->power_list, &pending);
1108 dev_err(w->dapm->dev,
1109 "Failed to apply widget power: %d\n", ret);
1112 if (!list_empty(&pending))
1113 dapm_seq_run_coalesced(cur_dapm, &pending);
1115 if (cur_dapm && cur_dapm->seq_notifier) {
1116 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1117 if (sort[i] == cur_sort)
1118 cur_dapm->seq_notifier(cur_dapm,
1123 static void dapm_widget_update(struct snd_soc_dapm_context *dapm)
1125 struct snd_soc_dapm_update *update = dapm->update;
1126 struct snd_soc_dapm_widget *w;
1135 (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
1136 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
1138 pr_err("%s DAPM pre-event failed: %d\n",
1142 ret = snd_soc_update_bits(w->codec, update->reg, update->mask,
1145 pr_err("%s DAPM update failed: %d\n", w->name, ret);
1148 (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1149 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1151 pr_err("%s DAPM post-event failed: %d\n",
1156 /* Async callback run prior to DAPM sequences - brings to _PREPARE if
1157 * they're changing state.
1159 static void dapm_pre_sequence_async(void *data, async_cookie_t cookie)
1161 struct snd_soc_dapm_context *d = data;
1164 /* If we're off and we're not supposed to be go into STANDBY */
1165 if (d->bias_level == SND_SOC_BIAS_OFF &&
1166 d->target_bias_level != SND_SOC_BIAS_OFF) {
1167 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1170 "Failed to turn on bias: %d\n", ret);
1173 /* Prepare for a STADDBY->ON or ON->STANDBY transition */
1174 if (d->bias_level != d->target_bias_level) {
1175 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);
1178 "Failed to prepare bias: %d\n", ret);
1182 /* Async callback run prior to DAPM sequences - brings to their final
1185 static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
1187 struct snd_soc_dapm_context *d = data;
1190 /* If we just powered the last thing off drop to standby bias */
1191 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1192 (d->target_bias_level == SND_SOC_BIAS_STANDBY ||
1193 d->target_bias_level == SND_SOC_BIAS_OFF)) {
1194 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1196 dev_err(d->dev, "Failed to apply standby bias: %d\n",
1200 /* If we're in standby and can support bias off then do that */
1201 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1202 d->target_bias_level == SND_SOC_BIAS_OFF) {
1203 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);
1205 dev_err(d->dev, "Failed to turn off bias: %d\n", ret);
1208 /* If we just powered up then move to active bias */
1209 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1210 d->target_bias_level == SND_SOC_BIAS_ON) {
1211 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);
1213 dev_err(d->dev, "Failed to apply active bias: %d\n",
1218 static void dapm_widget_set_power(struct snd_soc_dapm_widget *w, bool power,
1219 struct list_head *up_list,
1220 struct list_head *down_list)
1222 struct snd_soc_dapm_path *path;
1224 if (w->power == power)
1227 trace_snd_soc_dapm_widget_power(w, power);
1229 /* If we changed our power state perhaps our neigbours changed
1230 * also. We're not yet smart enough to update relevant
1231 * neighbours when we change the state of a widget, this acts
1232 * as a proxy for that. It will notify more neighbours than
1235 list_for_each_entry(path, &w->sources, list_sink) {
1237 dapm_mark_dirty(path->source);
1240 list_for_each_entry(path, &w->sinks, list_source) {
1242 dapm_mark_dirty(path->sink);
1247 dapm_seq_insert(w, up_list, true);
1249 dapm_seq_insert(w, down_list, false);
1254 static void dapm_power_one_widget(struct snd_soc_dapm_widget *w,
1255 struct list_head *up_list,
1256 struct list_head *down_list)
1261 case snd_soc_dapm_pre:
1262 dapm_seq_insert(w, down_list, false);
1264 case snd_soc_dapm_post:
1265 dapm_seq_insert(w, up_list, true);
1269 power = dapm_widget_power_check(w);
1271 dapm_widget_set_power(w, power, up_list, down_list);
1277 * Scan each dapm widget for complete audio path.
1278 * A complete path is a route that has valid endpoints i.e.:-
1280 * o DAC to output pin.
1281 * o Input Pin to ADC.
1282 * o Input pin to Output pin (bypass, sidetone)
1283 * o DAC to ADC (loopback).
1285 static int dapm_power_widgets(struct snd_soc_dapm_context *dapm, int event)
1287 struct snd_soc_card *card = dapm->card;
1288 struct snd_soc_dapm_widget *w;
1289 struct snd_soc_dapm_context *d;
1291 LIST_HEAD(down_list);
1292 LIST_HEAD(async_domain);
1293 enum snd_soc_bias_level bias;
1295 trace_snd_soc_dapm_start(card);
1297 list_for_each_entry(d, &card->dapm_list, list) {
1298 if (d->n_widgets || d->codec == NULL) {
1299 if (d->idle_bias_off)
1300 d->target_bias_level = SND_SOC_BIAS_OFF;
1302 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1306 memset(&card->dapm_stats, 0, sizeof(card->dapm_stats));
1308 /* Check which widgets we need to power and store them in
1309 * lists indicating if they should be powered up or down. We
1310 * only check widgets that have been flagged as dirty but note
1311 * that new widgets may be added to the dirty list while we
1314 list_for_each_entry(w, &card->dapm_dirty, dirty) {
1315 dapm_power_one_widget(w, &up_list, &down_list);
1318 list_for_each_entry(w, &card->widgets, list) {
1319 list_del_init(&w->dirty);
1324 /* Supplies and micbiases only bring the
1325 * context up to STANDBY as unless something
1326 * else is active and passing audio they
1327 * generally don't require full power.
1330 case snd_soc_dapm_supply:
1331 case snd_soc_dapm_micbias:
1332 if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
1333 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1336 d->target_bias_level = SND_SOC_BIAS_ON;
1343 /* If there are no DAPM widgets then try to figure out power from the
1346 if (!dapm->n_widgets) {
1348 case SND_SOC_DAPM_STREAM_START:
1349 case SND_SOC_DAPM_STREAM_RESUME:
1350 dapm->target_bias_level = SND_SOC_BIAS_ON;
1352 case SND_SOC_DAPM_STREAM_STOP:
1353 if (dapm->codec->active)
1354 dapm->target_bias_level = SND_SOC_BIAS_ON;
1356 dapm->target_bias_level = SND_SOC_BIAS_STANDBY;
1358 case SND_SOC_DAPM_STREAM_SUSPEND:
1359 dapm->target_bias_level = SND_SOC_BIAS_STANDBY;
1361 case SND_SOC_DAPM_STREAM_NOP:
1362 dapm->target_bias_level = dapm->bias_level;
1369 /* Force all contexts in the card to the same bias state if
1370 * they're not ground referenced.
1372 bias = SND_SOC_BIAS_OFF;
1373 list_for_each_entry(d, &card->dapm_list, list)
1374 if (d->target_bias_level > bias)
1375 bias = d->target_bias_level;
1376 list_for_each_entry(d, &card->dapm_list, list)
1377 if (!d->idle_bias_off)
1378 d->target_bias_level = bias;
1380 trace_snd_soc_dapm_walk_done(card);
1382 /* Run all the bias changes in parallel */
1383 list_for_each_entry(d, &dapm->card->dapm_list, list)
1384 async_schedule_domain(dapm_pre_sequence_async, d,
1386 async_synchronize_full_domain(&async_domain);
1388 /* Power down widgets first; try to avoid amplifying pops. */
1389 dapm_seq_run(dapm, &down_list, event, false);
1391 dapm_widget_update(dapm);
1394 dapm_seq_run(dapm, &up_list, event, true);
1396 /* Run all the bias changes in parallel */
1397 list_for_each_entry(d, &dapm->card->dapm_list, list)
1398 async_schedule_domain(dapm_post_sequence_async, d,
1400 async_synchronize_full_domain(&async_domain);
1402 pop_dbg(dapm->dev, card->pop_time,
1403 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
1404 pop_wait(card->pop_time);
1406 trace_snd_soc_dapm_done(card);
1411 #ifdef CONFIG_DEBUG_FS
1412 static int dapm_widget_power_open_file(struct inode *inode, struct file *file)
1414 file->private_data = inode->i_private;
1418 static ssize_t dapm_widget_power_read_file(struct file *file,
1419 char __user *user_buf,
1420 size_t count, loff_t *ppos)
1422 struct snd_soc_dapm_widget *w = file->private_data;
1426 struct snd_soc_dapm_path *p = NULL;
1428 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1432 in = is_connected_input_ep(w);
1433 dapm_clear_walk(w->dapm);
1434 out = is_connected_output_ep(w);
1435 dapm_clear_walk(w->dapm);
1437 ret = snprintf(buf, PAGE_SIZE, "%s: %s in %d out %d",
1438 w->name, w->power ? "On" : "Off", in, out);
1441 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1442 " - R%d(0x%x) bit %d",
1443 w->reg, w->reg, w->shift);
1445 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1448 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1450 w->active ? "active" : "inactive");
1452 list_for_each_entry(p, &w->sources, list_sink) {
1453 if (p->connected && !p->connected(w, p->sink))
1457 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1458 " in \"%s\" \"%s\"\n",
1459 p->name ? p->name : "static",
1462 list_for_each_entry(p, &w->sinks, list_source) {
1463 if (p->connected && !p->connected(w, p->sink))
1467 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1468 " out \"%s\" \"%s\"\n",
1469 p->name ? p->name : "static",
1473 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1479 static const struct file_operations dapm_widget_power_fops = {
1480 .open = dapm_widget_power_open_file,
1481 .read = dapm_widget_power_read_file,
1482 .llseek = default_llseek,
1485 static int dapm_bias_open_file(struct inode *inode, struct file *file)
1487 file->private_data = inode->i_private;
1491 static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
1492 size_t count, loff_t *ppos)
1494 struct snd_soc_dapm_context *dapm = file->private_data;
1497 switch (dapm->bias_level) {
1498 case SND_SOC_BIAS_ON:
1501 case SND_SOC_BIAS_PREPARE:
1502 level = "Prepare\n";
1504 case SND_SOC_BIAS_STANDBY:
1505 level = "Standby\n";
1507 case SND_SOC_BIAS_OFF:
1512 level = "Unknown\n";
1516 return simple_read_from_buffer(user_buf, count, ppos, level,
1520 static const struct file_operations dapm_bias_fops = {
1521 .open = dapm_bias_open_file,
1522 .read = dapm_bias_read_file,
1523 .llseek = default_llseek,
1526 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1527 struct dentry *parent)
1531 dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
1533 if (!dapm->debugfs_dapm) {
1535 "Failed to create DAPM debugfs directory\n");
1539 d = debugfs_create_file("bias_level", 0444,
1540 dapm->debugfs_dapm, dapm,
1544 "ASoC: Failed to create bias level debugfs file\n");
1547 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1549 struct snd_soc_dapm_context *dapm = w->dapm;
1552 if (!dapm->debugfs_dapm || !w->name)
1555 d = debugfs_create_file(w->name, 0444,
1556 dapm->debugfs_dapm, w,
1557 &dapm_widget_power_fops);
1559 dev_warn(w->dapm->dev,
1560 "ASoC: Failed to create %s debugfs file\n",
1564 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1566 debugfs_remove_recursive(dapm->debugfs_dapm);
1570 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1571 struct dentry *parent)
1575 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1579 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1585 /* test and update the power status of a mux widget */
1586 static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1587 struct snd_kcontrol *kcontrol, int change,
1588 int mux, struct soc_enum *e)
1590 struct snd_soc_dapm_path *path;
1593 if (widget->id != snd_soc_dapm_mux &&
1594 widget->id != snd_soc_dapm_virt_mux &&
1595 widget->id != snd_soc_dapm_value_mux)
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 if (!path->name || !e->texts[mux])
1610 /* we now need to match the string in the enum to the path */
1611 if (!(strcmp(path->name, e->texts[mux]))) {
1612 path->connect = 1; /* new connection */
1613 dapm_mark_dirty(path->source);
1616 dapm_mark_dirty(path->source);
1617 path->connect = 0; /* old connection must be powered down */
1622 dapm_mark_dirty(widget);
1623 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1629 /* test and update the power status of a mixer or switch widget */
1630 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1631 struct snd_kcontrol *kcontrol, int connect)
1633 struct snd_soc_dapm_path *path;
1636 if (widget->id != snd_soc_dapm_mixer &&
1637 widget->id != snd_soc_dapm_mixer_named_ctl &&
1638 widget->id != snd_soc_dapm_switch)
1641 /* find dapm widget path assoc with kcontrol */
1642 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1643 if (path->kcontrol != kcontrol)
1646 /* found, now check type */
1648 path->connect = connect;
1649 dapm_mark_dirty(path->source);
1653 dapm_mark_dirty(widget);
1654 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1660 /* show dapm widget status in sys fs */
1661 static ssize_t dapm_widget_show(struct device *dev,
1662 struct device_attribute *attr, char *buf)
1664 struct snd_soc_pcm_runtime *rtd =
1665 container_of(dev, struct snd_soc_pcm_runtime, dev);
1666 struct snd_soc_codec *codec =rtd->codec;
1667 struct snd_soc_dapm_widget *w;
1669 char *state = "not set";
1671 list_for_each_entry(w, &codec->card->widgets, list) {
1672 if (w->dapm != &codec->dapm)
1675 /* only display widgets that burnm power */
1677 case snd_soc_dapm_hp:
1678 case snd_soc_dapm_mic:
1679 case snd_soc_dapm_spk:
1680 case snd_soc_dapm_line:
1681 case snd_soc_dapm_micbias:
1682 case snd_soc_dapm_dac:
1683 case snd_soc_dapm_adc:
1684 case snd_soc_dapm_pga:
1685 case snd_soc_dapm_out_drv:
1686 case snd_soc_dapm_mixer:
1687 case snd_soc_dapm_mixer_named_ctl:
1688 case snd_soc_dapm_supply:
1690 count += sprintf(buf + count, "%s: %s\n",
1691 w->name, w->power ? "On":"Off");
1698 switch (codec->dapm.bias_level) {
1699 case SND_SOC_BIAS_ON:
1702 case SND_SOC_BIAS_PREPARE:
1705 case SND_SOC_BIAS_STANDBY:
1708 case SND_SOC_BIAS_OFF:
1712 count += sprintf(buf + count, "PM State: %s\n", state);
1717 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
1719 int snd_soc_dapm_sys_add(struct device *dev)
1721 return device_create_file(dev, &dev_attr_dapm_widget);
1724 static void snd_soc_dapm_sys_remove(struct device *dev)
1726 device_remove_file(dev, &dev_attr_dapm_widget);
1729 /* free all dapm widgets and resources */
1730 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
1732 struct snd_soc_dapm_widget *w, *next_w;
1733 struct snd_soc_dapm_path *p, *next_p;
1735 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
1736 if (w->dapm != dapm)
1740 * remove source and sink paths associated to this widget.
1741 * While removing the path, remove reference to it from both
1742 * source and sink widgets so that path is removed only once.
1744 list_for_each_entry_safe(p, next_p, &w->sources, list_sink) {
1745 list_del(&p->list_sink);
1746 list_del(&p->list_source);
1748 kfree(p->long_name);
1751 list_for_each_entry_safe(p, next_p, &w->sinks, list_source) {
1752 list_del(&p->list_sink);
1753 list_del(&p->list_source);
1755 kfree(p->long_name);
1758 kfree(w->kcontrols);
1764 static struct snd_soc_dapm_widget *dapm_find_widget(
1765 struct snd_soc_dapm_context *dapm, const char *pin,
1766 bool search_other_contexts)
1768 struct snd_soc_dapm_widget *w;
1769 struct snd_soc_dapm_widget *fallback = NULL;
1771 list_for_each_entry(w, &dapm->card->widgets, list) {
1772 if (!strcmp(w->name, pin)) {
1773 if (w->dapm == dapm)
1780 if (search_other_contexts)
1786 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
1787 const char *pin, int status)
1789 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
1792 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
1796 w->connected = status;
1805 * snd_soc_dapm_sync - scan and power dapm paths
1806 * @dapm: DAPM context
1808 * Walks all dapm audio paths and powers widgets according to their
1809 * stream or path usage.
1811 * Returns 0 for success.
1813 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
1815 return dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
1817 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
1819 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
1820 const struct snd_soc_dapm_route *route)
1822 struct snd_soc_dapm_path *path;
1823 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
1824 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
1826 const char *control = route->control;
1828 char prefixed_sink[80];
1829 char prefixed_source[80];
1832 if (dapm->codec && dapm->codec->name_prefix) {
1833 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
1834 dapm->codec->name_prefix, route->sink);
1835 sink = prefixed_sink;
1836 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
1837 dapm->codec->name_prefix, route->source);
1838 source = prefixed_source;
1841 source = route->source;
1845 * find src and dest widgets over all widgets but favor a widget from
1846 * current DAPM context
1848 list_for_each_entry(w, &dapm->card->widgets, list) {
1849 if (!wsink && !(strcmp(w->name, sink))) {
1851 if (w->dapm == dapm)
1855 if (!wsource && !(strcmp(w->name, source))) {
1857 if (w->dapm == dapm)
1861 /* use widget from another DAPM context if not found from this */
1867 if (wsource == NULL || wsink == NULL)
1870 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
1874 path->source = wsource;
1876 path->connected = route->connected;
1877 INIT_LIST_HEAD(&path->list);
1878 INIT_LIST_HEAD(&path->list_source);
1879 INIT_LIST_HEAD(&path->list_sink);
1881 /* check for external widgets */
1882 if (wsink->id == snd_soc_dapm_input) {
1883 if (wsource->id == snd_soc_dapm_micbias ||
1884 wsource->id == snd_soc_dapm_mic ||
1885 wsource->id == snd_soc_dapm_line ||
1886 wsource->id == snd_soc_dapm_output)
1889 if (wsource->id == snd_soc_dapm_output) {
1890 if (wsink->id == snd_soc_dapm_spk ||
1891 wsink->id == snd_soc_dapm_hp ||
1892 wsink->id == snd_soc_dapm_line ||
1893 wsink->id == snd_soc_dapm_input)
1897 /* connect static paths */
1898 if (control == NULL) {
1899 list_add(&path->list, &dapm->card->paths);
1900 list_add(&path->list_sink, &wsink->sources);
1901 list_add(&path->list_source, &wsource->sinks);
1906 /* connect dynamic paths */
1907 switch (wsink->id) {
1908 case snd_soc_dapm_adc:
1909 case snd_soc_dapm_dac:
1910 case snd_soc_dapm_pga:
1911 case snd_soc_dapm_out_drv:
1912 case snd_soc_dapm_input:
1913 case snd_soc_dapm_output:
1914 case snd_soc_dapm_micbias:
1915 case snd_soc_dapm_vmid:
1916 case snd_soc_dapm_pre:
1917 case snd_soc_dapm_post:
1918 case snd_soc_dapm_supply:
1919 case snd_soc_dapm_aif_in:
1920 case snd_soc_dapm_aif_out:
1921 list_add(&path->list, &dapm->card->paths);
1922 list_add(&path->list_sink, &wsink->sources);
1923 list_add(&path->list_source, &wsource->sinks);
1926 case snd_soc_dapm_mux:
1927 case snd_soc_dapm_virt_mux:
1928 case snd_soc_dapm_value_mux:
1929 ret = dapm_connect_mux(dapm, wsource, wsink, path, control,
1930 &wsink->kcontrol_news[0]);
1934 case snd_soc_dapm_switch:
1935 case snd_soc_dapm_mixer:
1936 case snd_soc_dapm_mixer_named_ctl:
1937 ret = dapm_connect_mixer(dapm, wsource, wsink, path, control);
1941 case snd_soc_dapm_hp:
1942 case snd_soc_dapm_mic:
1943 case snd_soc_dapm_line:
1944 case snd_soc_dapm_spk:
1945 list_add(&path->list, &dapm->card->paths);
1946 list_add(&path->list_sink, &wsink->sources);
1947 list_add(&path->list_source, &wsource->sinks);
1954 dev_warn(dapm->dev, "asoc: no dapm match for %s --> %s --> %s\n",
1955 source, control, sink);
1961 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1962 * @dapm: DAPM context
1963 * @route: audio routes
1964 * @num: number of routes
1966 * Connects 2 dapm widgets together via a named audio path. The sink is
1967 * the widget receiving the audio signal, whilst the source is the sender
1968 * of the audio signal.
1970 * Returns 0 for success else error. On error all resources can be freed
1971 * with a call to snd_soc_card_free().
1973 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
1974 const struct snd_soc_dapm_route *route, int num)
1978 for (i = 0; i < num; i++) {
1979 ret = snd_soc_dapm_add_route(dapm, route);
1981 dev_err(dapm->dev, "Failed to add route %s->%s\n",
1982 route->source, route->sink);
1990 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
1992 static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm,
1993 const struct snd_soc_dapm_route *route)
1995 struct snd_soc_dapm_widget *source = dapm_find_widget(dapm,
1998 struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm,
2001 struct snd_soc_dapm_path *path;
2005 dev_err(dapm->dev, "Unable to find source %s for weak route\n",
2011 dev_err(dapm->dev, "Unable to find sink %s for weak route\n",
2016 if (route->control || route->connected)
2017 dev_warn(dapm->dev, "Ignoring control for weak route %s->%s\n",
2018 route->source, route->sink);
2020 list_for_each_entry(path, &source->sinks, list_source) {
2021 if (path->sink == sink) {
2028 dev_err(dapm->dev, "No path found for weak route %s->%s\n",
2029 route->source, route->sink);
2031 dev_warn(dapm->dev, "%d paths found for weak route %s->%s\n",
2032 count, route->source, route->sink);
2038 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
2039 * @dapm: DAPM context
2040 * @route: audio routes
2041 * @num: number of routes
2043 * Mark existing routes matching those specified in the passed array
2044 * as being weak, meaning that they are ignored for the purpose of
2045 * power decisions. The main intended use case is for sidetone paths
2046 * which couple audio between other independent paths if they are both
2047 * active in order to make the combination work better at the user
2048 * level but which aren't intended to be "used".
2050 * Note that CODEC drivers should not use this as sidetone type paths
2051 * can frequently also be used as bypass paths.
2053 int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm,
2054 const struct snd_soc_dapm_route *route, int num)
2059 for (i = 0; i < num; i++) {
2060 err = snd_soc_dapm_weak_route(dapm, route);
2068 EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes);
2071 * snd_soc_dapm_new_widgets - add new dapm widgets
2072 * @dapm: DAPM context
2074 * Checks the codec for any new dapm widgets and creates them if found.
2076 * Returns 0 for success.
2078 int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context *dapm)
2080 struct snd_soc_dapm_widget *w;
2083 list_for_each_entry(w, &dapm->card->widgets, list)
2088 if (w->num_kcontrols) {
2089 w->kcontrols = kzalloc(w->num_kcontrols *
2090 sizeof(struct snd_kcontrol *),
2097 case snd_soc_dapm_switch:
2098 case snd_soc_dapm_mixer:
2099 case snd_soc_dapm_mixer_named_ctl:
2100 w->power_check = dapm_generic_check_power;
2103 case snd_soc_dapm_mux:
2104 case snd_soc_dapm_virt_mux:
2105 case snd_soc_dapm_value_mux:
2106 w->power_check = dapm_generic_check_power;
2109 case snd_soc_dapm_adc:
2110 case snd_soc_dapm_aif_out:
2111 w->power_check = dapm_adc_check_power;
2113 case snd_soc_dapm_dac:
2114 case snd_soc_dapm_aif_in:
2115 w->power_check = dapm_dac_check_power;
2117 case snd_soc_dapm_pga:
2118 case snd_soc_dapm_out_drv:
2119 w->power_check = dapm_generic_check_power;
2122 case snd_soc_dapm_input:
2123 case snd_soc_dapm_output:
2124 case snd_soc_dapm_micbias:
2125 case snd_soc_dapm_spk:
2126 case snd_soc_dapm_hp:
2127 case snd_soc_dapm_mic:
2128 case snd_soc_dapm_line:
2129 w->power_check = dapm_generic_check_power;
2131 case snd_soc_dapm_supply:
2132 w->power_check = dapm_supply_check_power;
2133 case snd_soc_dapm_vmid:
2134 case snd_soc_dapm_pre:
2135 case snd_soc_dapm_post:
2139 if (!w->power_check)
2140 w->power_check = dapm_always_on_check_power;
2142 /* Read the initial power state from the device */
2144 val = soc_widget_read(w, w->reg);
2145 val &= 1 << w->shift;
2155 list_add(&w->dirty, &(w->dapm->card->dapm_dirty));
2156 dapm_debugfs_add_widget(w);
2159 dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
2162 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
2165 * snd_soc_dapm_get_volsw - dapm mixer get callback
2166 * @kcontrol: mixer control
2167 * @ucontrol: control element information
2169 * Callback to get the value of a dapm mixer control.
2171 * Returns 0 for success.
2173 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
2174 struct snd_ctl_elem_value *ucontrol)
2176 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2177 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2178 struct soc_mixer_control *mc =
2179 (struct soc_mixer_control *)kcontrol->private_value;
2180 unsigned int reg = mc->reg;
2181 unsigned int shift = mc->shift;
2182 unsigned int rshift = mc->rshift;
2184 unsigned int invert = mc->invert;
2185 unsigned int mask = (1 << fls(max)) - 1;
2187 ucontrol->value.integer.value[0] =
2188 (snd_soc_read(widget->codec, reg) >> shift) & mask;
2189 if (shift != rshift)
2190 ucontrol->value.integer.value[1] =
2191 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
2193 ucontrol->value.integer.value[0] =
2194 max - ucontrol->value.integer.value[0];
2195 if (shift != rshift)
2196 ucontrol->value.integer.value[1] =
2197 max - ucontrol->value.integer.value[1];
2202 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
2205 * snd_soc_dapm_put_volsw - dapm mixer set callback
2206 * @kcontrol: mixer control
2207 * @ucontrol: control element information
2209 * Callback to set the value of a dapm mixer control.
2211 * Returns 0 for success.
2213 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
2214 struct snd_ctl_elem_value *ucontrol)
2216 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2217 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2218 struct snd_soc_codec *codec = widget->codec;
2219 struct soc_mixer_control *mc =
2220 (struct soc_mixer_control *)kcontrol->private_value;
2221 unsigned int reg = mc->reg;
2222 unsigned int shift = mc->shift;
2224 unsigned int mask = (1 << fls(max)) - 1;
2225 unsigned int invert = mc->invert;
2227 int connect, change;
2228 struct snd_soc_dapm_update update;
2231 val = (ucontrol->value.integer.value[0] & mask);
2235 mask = mask << shift;
2239 /* new connection */
2240 connect = invert ? 0 : 1;
2242 /* old connection must be powered down */
2243 connect = invert ? 1 : 0;
2245 mutex_lock(&codec->mutex);
2247 change = snd_soc_test_bits(widget->codec, reg, mask, val);
2249 for (wi = 0; wi < wlist->num_widgets; wi++) {
2250 widget = wlist->widgets[wi];
2252 widget->value = val;
2254 update.kcontrol = kcontrol;
2255 update.widget = widget;
2259 widget->dapm->update = &update;
2261 dapm_mixer_update_power(widget, kcontrol, connect);
2263 widget->dapm->update = NULL;
2267 mutex_unlock(&codec->mutex);
2270 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
2273 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
2274 * @kcontrol: mixer control
2275 * @ucontrol: control element information
2277 * Callback to get the value of a dapm enumerated double mixer control.
2279 * Returns 0 for success.
2281 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
2282 struct snd_ctl_elem_value *ucontrol)
2284 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2285 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2286 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2287 unsigned int val, bitmask;
2289 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2291 val = snd_soc_read(widget->codec, e->reg);
2292 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
2293 if (e->shift_l != e->shift_r)
2294 ucontrol->value.enumerated.item[1] =
2295 (val >> e->shift_r) & (bitmask - 1);
2299 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
2302 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
2303 * @kcontrol: mixer control
2304 * @ucontrol: control element information
2306 * Callback to set the value of a dapm enumerated double mixer control.
2308 * Returns 0 for success.
2310 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
2311 struct snd_ctl_elem_value *ucontrol)
2313 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2314 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2315 struct snd_soc_codec *codec = widget->codec;
2316 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2317 unsigned int val, mux, change;
2318 unsigned int mask, bitmask;
2319 struct snd_soc_dapm_update update;
2322 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2324 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2326 mux = ucontrol->value.enumerated.item[0];
2327 val = mux << e->shift_l;
2328 mask = (bitmask - 1) << e->shift_l;
2329 if (e->shift_l != e->shift_r) {
2330 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2332 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2333 mask |= (bitmask - 1) << e->shift_r;
2336 mutex_lock(&codec->mutex);
2338 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2340 for (wi = 0; wi < wlist->num_widgets; wi++) {
2341 widget = wlist->widgets[wi];
2343 widget->value = val;
2345 update.kcontrol = kcontrol;
2346 update.widget = widget;
2347 update.reg = e->reg;
2350 widget->dapm->update = &update;
2352 dapm_mux_update_power(widget, kcontrol, change, mux, e);
2354 widget->dapm->update = NULL;
2358 mutex_unlock(&codec->mutex);
2361 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
2364 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
2365 * @kcontrol: mixer control
2366 * @ucontrol: control element information
2368 * Returns 0 for success.
2370 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
2371 struct snd_ctl_elem_value *ucontrol)
2373 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2374 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2376 ucontrol->value.enumerated.item[0] = widget->value;
2380 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt);
2383 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
2384 * @kcontrol: mixer control
2385 * @ucontrol: control element information
2387 * Returns 0 for success.
2389 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
2390 struct snd_ctl_elem_value *ucontrol)
2392 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2393 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2394 struct snd_soc_codec *codec = widget->codec;
2395 struct soc_enum *e =
2396 (struct soc_enum *)kcontrol->private_value;
2401 if (ucontrol->value.enumerated.item[0] >= e->max)
2404 mutex_lock(&codec->mutex);
2406 change = widget->value != ucontrol->value.enumerated.item[0];
2408 for (wi = 0; wi < wlist->num_widgets; wi++) {
2409 widget = wlist->widgets[wi];
2411 widget->value = ucontrol->value.enumerated.item[0];
2413 dapm_mux_update_power(widget, kcontrol, change,
2418 mutex_unlock(&codec->mutex);
2421 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt);
2424 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
2426 * @kcontrol: mixer control
2427 * @ucontrol: control element information
2429 * Callback to get the value of a dapm semi enumerated double mixer control.
2431 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2432 * used for handling bitfield coded enumeration for example.
2434 * Returns 0 for success.
2436 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
2437 struct snd_ctl_elem_value *ucontrol)
2439 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2440 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2441 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2442 unsigned int reg_val, val, mux;
2444 reg_val = snd_soc_read(widget->codec, e->reg);
2445 val = (reg_val >> e->shift_l) & e->mask;
2446 for (mux = 0; mux < e->max; mux++) {
2447 if (val == e->values[mux])
2450 ucontrol->value.enumerated.item[0] = mux;
2451 if (e->shift_l != e->shift_r) {
2452 val = (reg_val >> e->shift_r) & e->mask;
2453 for (mux = 0; mux < e->max; mux++) {
2454 if (val == e->values[mux])
2457 ucontrol->value.enumerated.item[1] = mux;
2462 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
2465 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
2467 * @kcontrol: mixer control
2468 * @ucontrol: control element information
2470 * Callback to set the value of a dapm semi enumerated double mixer control.
2472 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2473 * used for handling bitfield coded enumeration for example.
2475 * Returns 0 for success.
2477 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
2478 struct snd_ctl_elem_value *ucontrol)
2480 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2481 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2482 struct snd_soc_codec *codec = widget->codec;
2483 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2484 unsigned int val, mux, change;
2486 struct snd_soc_dapm_update update;
2489 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2491 mux = ucontrol->value.enumerated.item[0];
2492 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2493 mask = e->mask << e->shift_l;
2494 if (e->shift_l != e->shift_r) {
2495 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2497 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2498 mask |= e->mask << e->shift_r;
2501 mutex_lock(&codec->mutex);
2503 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2505 for (wi = 0; wi < wlist->num_widgets; wi++) {
2506 widget = wlist->widgets[wi];
2508 widget->value = val;
2510 update.kcontrol = kcontrol;
2511 update.widget = widget;
2512 update.reg = e->reg;
2515 widget->dapm->update = &update;
2517 dapm_mux_update_power(widget, kcontrol, change, mux, e);
2519 widget->dapm->update = NULL;
2523 mutex_unlock(&codec->mutex);
2526 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
2529 * snd_soc_dapm_info_pin_switch - Info for a pin switch
2531 * @kcontrol: mixer control
2532 * @uinfo: control element information
2534 * Callback to provide information about a pin switch control.
2536 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
2537 struct snd_ctl_elem_info *uinfo)
2539 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2541 uinfo->value.integer.min = 0;
2542 uinfo->value.integer.max = 1;
2546 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
2549 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
2551 * @kcontrol: mixer control
2554 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
2555 struct snd_ctl_elem_value *ucontrol)
2557 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2558 const char *pin = (const char *)kcontrol->private_value;
2560 mutex_lock(&codec->mutex);
2562 ucontrol->value.integer.value[0] =
2563 snd_soc_dapm_get_pin_status(&codec->dapm, pin);
2565 mutex_unlock(&codec->mutex);
2569 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
2572 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
2574 * @kcontrol: mixer control
2577 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
2578 struct snd_ctl_elem_value *ucontrol)
2580 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2581 const char *pin = (const char *)kcontrol->private_value;
2583 mutex_lock(&codec->mutex);
2585 if (ucontrol->value.integer.value[0])
2586 snd_soc_dapm_enable_pin(&codec->dapm, pin);
2588 snd_soc_dapm_disable_pin(&codec->dapm, pin);
2590 snd_soc_dapm_sync(&codec->dapm);
2592 mutex_unlock(&codec->mutex);
2596 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
2599 * snd_soc_dapm_new_control - create new dapm control
2600 * @dapm: DAPM context
2601 * @widget: widget template
2603 * Creates a new dapm control based upon the template.
2605 * Returns 0 for success else error.
2607 int snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
2608 const struct snd_soc_dapm_widget *widget)
2610 struct snd_soc_dapm_widget *w;
2613 if ((w = dapm_cnew_widget(widget)) == NULL)
2616 name_len = strlen(widget->name) + 1;
2617 if (dapm->codec && dapm->codec->name_prefix)
2618 name_len += 1 + strlen(dapm->codec->name_prefix);
2619 w->name = kmalloc(name_len, GFP_KERNEL);
2620 if (w->name == NULL) {
2624 if (dapm->codec && dapm->codec->name_prefix)
2625 snprintf(w->name, name_len, "%s %s",
2626 dapm->codec->name_prefix, widget->name);
2628 snprintf(w->name, name_len, "%s", widget->name);
2632 w->codec = dapm->codec;
2633 w->platform = dapm->platform;
2634 INIT_LIST_HEAD(&w->sources);
2635 INIT_LIST_HEAD(&w->sinks);
2636 INIT_LIST_HEAD(&w->list);
2637 INIT_LIST_HEAD(&w->dirty);
2638 list_add(&w->list, &dapm->card->widgets);
2640 /* machine layer set ups unconnected pins and insertions */
2644 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
2647 * snd_soc_dapm_new_controls - create new dapm controls
2648 * @dapm: DAPM context
2649 * @widget: widget array
2650 * @num: number of widgets
2652 * Creates new DAPM controls based upon the templates.
2654 * Returns 0 for success else error.
2656 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
2657 const struct snd_soc_dapm_widget *widget,
2662 for (i = 0; i < num; i++) {
2663 ret = snd_soc_dapm_new_control(dapm, widget);
2666 "ASoC: Failed to create DAPM control %s: %d\n",
2674 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
2676 static void soc_dapm_stream_event(struct snd_soc_dapm_context *dapm,
2677 const char *stream, int event)
2679 struct snd_soc_dapm_widget *w;
2681 list_for_each_entry(w, &dapm->card->widgets, list)
2683 if (!w->sname || w->dapm != dapm)
2685 dev_vdbg(w->dapm->dev, "widget %s\n %s stream %s event %d\n",
2686 w->name, w->sname, stream, event);
2687 if (strstr(w->sname, stream)) {
2690 case SND_SOC_DAPM_STREAM_START:
2693 case SND_SOC_DAPM_STREAM_STOP:
2696 case SND_SOC_DAPM_STREAM_SUSPEND:
2697 case SND_SOC_DAPM_STREAM_RESUME:
2698 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
2699 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
2705 dapm_power_widgets(dapm, event);
2707 /* do we need to notify any clients that DAPM stream is complete */
2708 if (dapm->stream_event)
2709 dapm->stream_event(dapm, event);
2713 * snd_soc_dapm_stream_event - send a stream event to the dapm core
2714 * @rtd: PCM runtime data
2715 * @stream: stream name
2716 * @event: stream event
2718 * Sends a stream event to the dapm core. The core then makes any
2719 * necessary widget power changes.
2721 * Returns 0 for success else error.
2723 int snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd,
2724 const char *stream, int event)
2726 struct snd_soc_codec *codec = rtd->codec;
2731 mutex_lock(&codec->mutex);
2732 soc_dapm_stream_event(&codec->dapm, stream, event);
2733 mutex_unlock(&codec->mutex);
2738 * snd_soc_dapm_enable_pin - enable pin.
2739 * @dapm: DAPM context
2742 * Enables input/output pin and its parents or children widgets iff there is
2743 * a valid audio route and active audio stream.
2744 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2745 * do any widget power switching.
2747 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
2749 return snd_soc_dapm_set_pin(dapm, pin, 1);
2751 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
2754 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
2755 * @dapm: DAPM context
2758 * Enables input/output pin regardless of any other state. This is
2759 * intended for use with microphone bias supplies used in microphone
2762 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2763 * do any widget power switching.
2765 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
2768 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2771 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
2775 dev_dbg(w->dapm->dev, "dapm: force enable pin %s\n", pin);
2782 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
2785 * snd_soc_dapm_disable_pin - disable pin.
2786 * @dapm: DAPM context
2789 * Disables input/output pin and its parents or children widgets.
2790 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2791 * do any widget power switching.
2793 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
2796 return snd_soc_dapm_set_pin(dapm, pin, 0);
2798 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
2801 * snd_soc_dapm_nc_pin - permanently disable pin.
2802 * @dapm: DAPM context
2805 * Marks the specified pin as being not connected, disabling it along
2806 * any parent or child widgets. At present this is identical to
2807 * snd_soc_dapm_disable_pin() but in future it will be extended to do
2808 * additional things such as disabling controls which only affect
2809 * paths through the pin.
2811 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2812 * do any widget power switching.
2814 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
2816 return snd_soc_dapm_set_pin(dapm, pin, 0);
2818 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
2821 * snd_soc_dapm_get_pin_status - get audio pin status
2822 * @dapm: DAPM context
2823 * @pin: audio signal pin endpoint (or start point)
2825 * Get audio pin status - connected or disconnected.
2827 * Returns 1 for connected otherwise 0.
2829 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
2832 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2835 return w->connected;
2839 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
2842 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
2843 * @dapm: DAPM context
2844 * @pin: audio signal pin endpoint (or start point)
2846 * Mark the given endpoint or pin as ignoring suspend. When the
2847 * system is disabled a path between two endpoints flagged as ignoring
2848 * suspend will not be disabled. The path must already be enabled via
2849 * normal means at suspend time, it will not be turned on if it was not
2852 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
2855 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
2858 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
2862 w->ignore_suspend = 1;
2866 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
2869 * snd_soc_dapm_free - free dapm resources
2870 * @dapm: DAPM context
2872 * Free all dapm widgets and resources.
2874 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
2876 snd_soc_dapm_sys_remove(dapm->dev);
2877 dapm_debugfs_cleanup(dapm);
2878 dapm_free_widgets(dapm);
2879 list_del(&dapm->list);
2881 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
2883 static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context *dapm)
2885 struct snd_soc_dapm_widget *w;
2886 LIST_HEAD(down_list);
2889 list_for_each_entry(w, &dapm->card->widgets, list) {
2890 if (w->dapm != dapm)
2893 dapm_seq_insert(w, &down_list, false);
2899 /* If there were no widgets to power down we're already in
2903 snd_soc_dapm_set_bias_level(dapm, SND_SOC_BIAS_PREPARE);
2904 dapm_seq_run(dapm, &down_list, 0, false);
2905 snd_soc_dapm_set_bias_level(dapm, SND_SOC_BIAS_STANDBY);
2910 * snd_soc_dapm_shutdown - callback for system shutdown
2912 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
2914 struct snd_soc_codec *codec;
2916 list_for_each_entry(codec, &card->codec_dev_list, list) {
2917 soc_dapm_shutdown_codec(&codec->dapm);
2918 snd_soc_dapm_set_bias_level(&codec->dapm, SND_SOC_BIAS_OFF);
2922 /* Module information */
2923 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2924 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
2925 MODULE_LICENSE("GPL");