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/headphone insertion events.
18 * o Automatic Mic Bias support
19 * o Jack insertion power event initiation - e.g. hp insertion will enable
21 * o Delayed power down of audio subsystem to reduce pops between a quick
26 #include <linux/module.h>
27 #include <linux/moduleparam.h>
28 #include <linux/init.h>
29 #include <linux/async.h>
30 #include <linux/delay.h>
32 #include <linux/bitops.h>
33 #include <linux/platform_device.h>
34 #include <linux/jiffies.h>
35 #include <linux/debugfs.h>
36 #include <linux/pm_runtime.h>
37 #include <linux/regulator/consumer.h>
38 #include <linux/slab.h>
39 #include <sound/core.h>
40 #include <sound/pcm.h>
41 #include <sound/pcm_params.h>
42 #include <sound/soc.h>
43 #include <sound/initval.h>
45 #include <trace/events/asoc.h>
47 #define DAPM_UPDATE_STAT(widget, val) widget->dapm->card->dapm_stats.val++;
49 /* dapm power sequences - make this per codec in the future */
50 static int dapm_up_seq[] = {
51 [snd_soc_dapm_pre] = 0,
52 [snd_soc_dapm_supply] = 1,
53 [snd_soc_dapm_regulator_supply] = 1,
54 [snd_soc_dapm_micbias] = 2,
55 [snd_soc_dapm_dai] = 3,
56 [snd_soc_dapm_aif_in] = 3,
57 [snd_soc_dapm_aif_out] = 3,
58 [snd_soc_dapm_mic] = 4,
59 [snd_soc_dapm_mux] = 5,
60 [snd_soc_dapm_virt_mux] = 5,
61 [snd_soc_dapm_value_mux] = 5,
62 [snd_soc_dapm_dac] = 6,
63 [snd_soc_dapm_mixer] = 7,
64 [snd_soc_dapm_mixer_named_ctl] = 7,
65 [snd_soc_dapm_pga] = 8,
66 [snd_soc_dapm_adc] = 9,
67 [snd_soc_dapm_out_drv] = 10,
68 [snd_soc_dapm_hp] = 10,
69 [snd_soc_dapm_spk] = 10,
70 [snd_soc_dapm_post] = 11,
73 static int dapm_down_seq[] = {
74 [snd_soc_dapm_pre] = 0,
75 [snd_soc_dapm_adc] = 1,
76 [snd_soc_dapm_hp] = 2,
77 [snd_soc_dapm_spk] = 2,
78 [snd_soc_dapm_out_drv] = 2,
79 [snd_soc_dapm_pga] = 4,
80 [snd_soc_dapm_mixer_named_ctl] = 5,
81 [snd_soc_dapm_mixer] = 5,
82 [snd_soc_dapm_dac] = 6,
83 [snd_soc_dapm_mic] = 7,
84 [snd_soc_dapm_micbias] = 8,
85 [snd_soc_dapm_mux] = 9,
86 [snd_soc_dapm_virt_mux] = 9,
87 [snd_soc_dapm_value_mux] = 9,
88 [snd_soc_dapm_aif_in] = 10,
89 [snd_soc_dapm_aif_out] = 10,
90 [snd_soc_dapm_dai] = 10,
91 [snd_soc_dapm_regulator_supply] = 11,
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 void dapm_mark_dirty(struct snd_soc_dapm_widget *w, const char *reason)
129 if (!dapm_dirty_widget(w)) {
130 dev_vdbg(w->dapm->dev, "Marking %s dirty due to %s\n",
132 list_add_tail(&w->dirty, &w->dapm->card->dapm_dirty);
135 EXPORT_SYMBOL_GPL(dapm_mark_dirty);
137 /* create a new dapm widget */
138 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
139 const struct snd_soc_dapm_widget *_widget)
141 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
144 /* get snd_card from DAPM context */
145 static inline struct snd_card *dapm_get_snd_card(
146 struct snd_soc_dapm_context *dapm)
149 return dapm->codec->card->snd_card;
150 else if (dapm->platform)
151 return dapm->platform->card->snd_card;
159 /* get soc_card from DAPM context */
160 static inline struct snd_soc_card *dapm_get_soc_card(
161 struct snd_soc_dapm_context *dapm)
164 return dapm->codec->card;
165 else if (dapm->platform)
166 return dapm->platform->card;
174 static void dapm_reset(struct snd_soc_card *card)
176 struct snd_soc_dapm_widget *w;
178 memset(&card->dapm_stats, 0, sizeof(card->dapm_stats));
180 list_for_each_entry(w, &card->widgets, list) {
181 w->power_checked = false;
187 static int soc_widget_read(struct snd_soc_dapm_widget *w, int reg)
190 return snd_soc_read(w->codec, reg);
191 else if (w->platform)
192 return snd_soc_platform_read(w->platform, reg);
194 dev_err(w->dapm->dev, "no valid widget read method\n");
198 static int soc_widget_write(struct snd_soc_dapm_widget *w, int reg, int val)
201 return snd_soc_write(w->codec, reg, val);
202 else if (w->platform)
203 return snd_soc_platform_write(w->platform, reg, val);
205 dev_err(w->dapm->dev, "no valid widget write method\n");
209 static int soc_widget_update_bits(struct snd_soc_dapm_widget *w,
210 unsigned short reg, unsigned int mask, unsigned int value)
213 unsigned int old, new;
216 if (w->codec && w->codec->using_regmap) {
217 ret = regmap_update_bits_check(w->codec->control_data,
218 reg, mask, value, &change);
222 ret = soc_widget_read(w, reg);
227 new = (old & ~mask) | (value & mask);
230 ret = soc_widget_write(w, reg, new);
240 * snd_soc_dapm_set_bias_level - set the bias level for the system
241 * @dapm: DAPM context
242 * @level: level to configure
244 * Configure the bias (power) levels for the SoC audio device.
246 * Returns 0 for success else error.
248 static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm,
249 enum snd_soc_bias_level level)
251 struct snd_soc_card *card = dapm->card;
254 trace_snd_soc_bias_level_start(card, level);
256 if (card && card->set_bias_level)
257 ret = card->set_bias_level(card, dapm, level);
262 if (dapm->codec->driver->set_bias_level)
263 ret = dapm->codec->driver->set_bias_level(dapm->codec,
266 dapm->bias_level = level;
271 if (card && card->set_bias_level_post)
272 ret = card->set_bias_level_post(card, dapm, level);
274 trace_snd_soc_bias_level_done(card, level);
279 /* set up initial codec paths */
280 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
281 struct snd_soc_dapm_path *p, int i)
284 case snd_soc_dapm_switch:
285 case snd_soc_dapm_mixer:
286 case snd_soc_dapm_mixer_named_ctl: {
288 struct soc_mixer_control *mc = (struct soc_mixer_control *)
289 w->kcontrol_news[i].private_value;
290 unsigned int reg = mc->reg;
291 unsigned int shift = mc->shift;
293 unsigned int mask = (1 << fls(max)) - 1;
294 unsigned int invert = mc->invert;
296 val = soc_widget_read(w, reg);
297 val = (val >> shift) & mask;
299 if ((invert && !val) || (!invert && val))
305 case snd_soc_dapm_mux: {
306 struct soc_enum *e = (struct soc_enum *)
307 w->kcontrol_news[i].private_value;
308 int val, item, bitmask;
310 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
312 val = soc_widget_read(w, e->reg);
313 item = (val >> e->shift_l) & (bitmask - 1);
316 for (i = 0; i < e->max; i++) {
317 if (!(strcmp(p->name, e->texts[i])) && item == i)
322 case snd_soc_dapm_virt_mux: {
323 struct soc_enum *e = (struct soc_enum *)
324 w->kcontrol_news[i].private_value;
327 /* since a virtual mux has no backing registers to
328 * decide which path to connect, it will try to match
329 * with the first enumeration. This is to ensure
330 * that the default mux choice (the first) will be
331 * correctly powered up during initialization.
333 if (!strcmp(p->name, e->texts[0]))
337 case snd_soc_dapm_value_mux: {
338 struct soc_enum *e = (struct soc_enum *)
339 w->kcontrol_news[i].private_value;
342 val = soc_widget_read(w, e->reg);
343 val = (val >> e->shift_l) & e->mask;
344 for (item = 0; item < e->max; item++) {
345 if (val == e->values[item])
350 for (i = 0; i < e->max; i++) {
351 if (!(strcmp(p->name, e->texts[i])) && item == i)
356 /* does not affect routing - always connected */
357 case snd_soc_dapm_pga:
358 case snd_soc_dapm_out_drv:
359 case snd_soc_dapm_output:
360 case snd_soc_dapm_adc:
361 case snd_soc_dapm_input:
362 case snd_soc_dapm_siggen:
363 case snd_soc_dapm_dac:
364 case snd_soc_dapm_micbias:
365 case snd_soc_dapm_vmid:
366 case snd_soc_dapm_supply:
367 case snd_soc_dapm_regulator_supply:
368 case snd_soc_dapm_aif_in:
369 case snd_soc_dapm_aif_out:
370 case snd_soc_dapm_dai:
371 case snd_soc_dapm_hp:
372 case snd_soc_dapm_mic:
373 case snd_soc_dapm_spk:
374 case snd_soc_dapm_line:
377 /* does affect routing - dynamically connected */
378 case snd_soc_dapm_pre:
379 case snd_soc_dapm_post:
385 /* connect mux widget to its interconnecting audio paths */
386 static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
387 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
388 struct snd_soc_dapm_path *path, const char *control_name,
389 const struct snd_kcontrol_new *kcontrol)
391 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
394 for (i = 0; i < e->max; i++) {
395 if (!(strcmp(control_name, e->texts[i]))) {
396 list_add(&path->list, &dapm->card->paths);
397 list_add(&path->list_sink, &dest->sources);
398 list_add(&path->list_source, &src->sinks);
399 path->name = (char*)e->texts[i];
400 dapm_set_path_status(dest, path, 0);
408 /* connect mixer widget to its interconnecting audio paths */
409 static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
410 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
411 struct snd_soc_dapm_path *path, const char *control_name)
415 /* search for mixer kcontrol */
416 for (i = 0; i < dest->num_kcontrols; i++) {
417 if (!strcmp(control_name, dest->kcontrol_news[i].name)) {
418 list_add(&path->list, &dapm->card->paths);
419 list_add(&path->list_sink, &dest->sources);
420 list_add(&path->list_source, &src->sinks);
421 path->name = dest->kcontrol_news[i].name;
422 dapm_set_path_status(dest, path, i);
429 static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm,
430 struct snd_soc_dapm_widget *kcontrolw,
431 const struct snd_kcontrol_new *kcontrol_new,
432 struct snd_kcontrol **kcontrol)
434 struct snd_soc_dapm_widget *w;
439 list_for_each_entry(w, &dapm->card->widgets, list) {
440 if (w == kcontrolw || w->dapm != kcontrolw->dapm)
442 for (i = 0; i < w->num_kcontrols; i++) {
443 if (&w->kcontrol_news[i] == kcontrol_new) {
445 *kcontrol = w->kcontrols[i];
454 /* create new dapm mixer control */
455 static int dapm_new_mixer(struct snd_soc_dapm_widget *w)
457 struct snd_soc_dapm_context *dapm = w->dapm;
459 size_t name_len, prefix_len;
460 struct snd_soc_dapm_path *path;
461 struct snd_card *card = dapm->card->snd_card;
463 struct snd_soc_dapm_widget_list *wlist;
467 prefix = dapm->codec->name_prefix;
472 prefix_len = strlen(prefix) + 1;
477 for (i = 0; i < w->num_kcontrols; i++) {
480 list_for_each_entry(path, &w->sources, list_sink) {
482 /* mixer/mux paths name must match control name */
483 if (path->name != (char *)w->kcontrol_news[i].name)
486 if (w->kcontrols[i]) {
487 path->kcontrol = w->kcontrols[i];
491 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
492 sizeof(struct snd_soc_dapm_widget *),
493 wlist = kzalloc(wlistsize, GFP_KERNEL);
496 "asoc: can't allocate widget list for %s\n",
500 wlist->num_widgets = 1;
501 wlist->widgets[0] = w;
503 /* add dapm control with long name.
504 * for dapm_mixer this is the concatenation of the
505 * mixer and kcontrol name.
506 * for dapm_mixer_named_ctl this is simply the
509 name_len = strlen(w->kcontrol_news[i].name) + 1;
510 if (w->id != snd_soc_dapm_mixer_named_ctl)
511 name_len += 1 + strlen(w->name);
513 path->long_name = kmalloc(name_len, GFP_KERNEL);
515 if (path->long_name == NULL) {
522 /* The control will get a prefix from
523 * the control creation process but
524 * we're also using the same prefix
525 * for widgets so cut the prefix off
526 * the front of the widget name.
528 snprintf((char *)path->long_name, name_len,
529 "%s %s", w->name + prefix_len,
530 w->kcontrol_news[i].name);
532 case snd_soc_dapm_mixer_named_ctl:
533 snprintf((char *)path->long_name, name_len,
534 "%s", w->kcontrol_news[i].name);
538 ((char *)path->long_name)[name_len - 1] = '\0';
540 path->kcontrol = snd_soc_cnew(&w->kcontrol_news[i],
541 wlist, path->long_name,
543 ret = snd_ctl_add(card, path->kcontrol);
546 "asoc: failed to add dapm kcontrol %s: %d\n",
547 path->long_name, ret);
549 kfree(path->long_name);
550 path->long_name = NULL;
553 w->kcontrols[i] = path->kcontrol;
559 /* create new dapm mux control */
560 static int dapm_new_mux(struct snd_soc_dapm_widget *w)
562 struct snd_soc_dapm_context *dapm = w->dapm;
563 struct snd_soc_dapm_path *path = NULL;
564 struct snd_kcontrol *kcontrol;
565 struct snd_card *card = dapm->card->snd_card;
569 struct snd_soc_dapm_widget_list *wlist;
570 int shared, wlistentries;
574 if (w->num_kcontrols != 1) {
576 "asoc: mux %s has incorrect number of controls\n",
581 shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[0],
584 wlist = kcontrol->private_data;
585 wlistentries = wlist->num_widgets + 1;
590 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
591 wlistentries * sizeof(struct snd_soc_dapm_widget *),
592 wlist = krealloc(wlist, wlistsize, GFP_KERNEL);
595 "asoc: can't allocate widget list for %s\n", w->name);
598 wlist->num_widgets = wlistentries;
599 wlist->widgets[wlistentries - 1] = w;
603 prefix = dapm->codec->name_prefix;
608 name = w->kcontrol_news[0].name;
613 prefix_len = strlen(prefix) + 1;
619 * The control will get a prefix from the control creation
620 * process but we're also using the same prefix for widgets so
621 * cut the prefix off the front of the widget name.
623 kcontrol = snd_soc_cnew(&w->kcontrol_news[0], wlist,
624 name + prefix_len, prefix);
625 ret = snd_ctl_add(card, kcontrol);
627 dev_err(dapm->dev, "failed to add kcontrol %s: %d\n",
634 kcontrol->private_data = wlist;
636 w->kcontrols[0] = kcontrol;
638 list_for_each_entry(path, &w->sources, list_sink)
639 path->kcontrol = kcontrol;
644 /* create new dapm volume control */
645 static int dapm_new_pga(struct snd_soc_dapm_widget *w)
647 if (w->num_kcontrols)
648 dev_err(w->dapm->dev,
649 "asoc: PGA controls not supported: '%s'\n", w->name);
654 /* reset 'walked' bit for each dapm path */
655 static inline void dapm_clear_walk(struct snd_soc_dapm_context *dapm)
657 struct snd_soc_dapm_path *p;
659 list_for_each_entry(p, &dapm->card->paths, list)
663 /* We implement power down on suspend by checking the power state of
664 * the ALSA card - when we are suspending the ALSA state for the card
667 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
669 int level = snd_power_get_state(widget->dapm->card->snd_card);
672 case SNDRV_CTL_POWER_D3hot:
673 case SNDRV_CTL_POWER_D3cold:
674 if (widget->ignore_suspend)
675 dev_dbg(widget->dapm->dev, "%s ignoring suspend\n",
677 return widget->ignore_suspend;
684 * Recursively check for a completed path to an active or physically connected
685 * output widget. Returns number of complete paths.
687 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
689 struct snd_soc_dapm_path *path;
692 if (widget->outputs >= 0)
693 return widget->outputs;
695 DAPM_UPDATE_STAT(widget, path_checks);
697 switch (widget->id) {
698 case snd_soc_dapm_supply:
699 case snd_soc_dapm_regulator_supply:
705 switch (widget->id) {
706 case snd_soc_dapm_adc:
707 case snd_soc_dapm_aif_out:
708 case snd_soc_dapm_dai:
709 if (widget->active) {
710 widget->outputs = snd_soc_dapm_suspend_check(widget);
711 return widget->outputs;
717 if (widget->connected) {
718 /* connected pin ? */
719 if (widget->id == snd_soc_dapm_output && !widget->ext) {
720 widget->outputs = snd_soc_dapm_suspend_check(widget);
721 return widget->outputs;
724 /* connected jack or spk ? */
725 if (widget->id == snd_soc_dapm_hp ||
726 widget->id == snd_soc_dapm_spk ||
727 (widget->id == snd_soc_dapm_line &&
728 !list_empty(&widget->sources))) {
729 widget->outputs = snd_soc_dapm_suspend_check(widget);
730 return widget->outputs;
734 list_for_each_entry(path, &widget->sinks, list_source) {
735 DAPM_UPDATE_STAT(widget, neighbour_checks);
743 if (path->sink && path->connect) {
745 con += is_connected_output_ep(path->sink);
749 widget->outputs = con;
755 * Recursively check for a completed path to an active or physically connected
756 * input widget. Returns number of complete paths.
758 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
760 struct snd_soc_dapm_path *path;
763 if (widget->inputs >= 0)
764 return widget->inputs;
766 DAPM_UPDATE_STAT(widget, path_checks);
768 switch (widget->id) {
769 case snd_soc_dapm_supply:
770 case snd_soc_dapm_regulator_supply:
776 /* active stream ? */
777 switch (widget->id) {
778 case snd_soc_dapm_dac:
779 case snd_soc_dapm_aif_in:
780 case snd_soc_dapm_dai:
781 if (widget->active) {
782 widget->inputs = snd_soc_dapm_suspend_check(widget);
783 return widget->inputs;
789 if (widget->connected) {
790 /* connected pin ? */
791 if (widget->id == snd_soc_dapm_input && !widget->ext) {
792 widget->inputs = snd_soc_dapm_suspend_check(widget);
793 return widget->inputs;
796 /* connected VMID/Bias for lower pops */
797 if (widget->id == snd_soc_dapm_vmid) {
798 widget->inputs = snd_soc_dapm_suspend_check(widget);
799 return widget->inputs;
802 /* connected jack ? */
803 if (widget->id == snd_soc_dapm_mic ||
804 (widget->id == snd_soc_dapm_line &&
805 !list_empty(&widget->sinks))) {
806 widget->inputs = snd_soc_dapm_suspend_check(widget);
807 return widget->inputs;
810 /* signal generator */
811 if (widget->id == snd_soc_dapm_siggen) {
812 widget->inputs = snd_soc_dapm_suspend_check(widget);
813 return widget->inputs;
817 list_for_each_entry(path, &widget->sources, list_sink) {
818 DAPM_UPDATE_STAT(widget, neighbour_checks);
826 if (path->source && path->connect) {
828 con += is_connected_input_ep(path->source);
832 widget->inputs = con;
838 * Handler for generic register modifier widget.
840 int dapm_reg_event(struct snd_soc_dapm_widget *w,
841 struct snd_kcontrol *kcontrol, int event)
845 if (SND_SOC_DAPM_EVENT_ON(event))
850 soc_widget_update_bits(w, -(w->reg + 1),
851 w->mask << w->shift, val << w->shift);
855 EXPORT_SYMBOL_GPL(dapm_reg_event);
858 * Handler for regulator supply widget.
860 int dapm_regulator_event(struct snd_soc_dapm_widget *w,
861 struct snd_kcontrol *kcontrol, int event)
863 if (SND_SOC_DAPM_EVENT_ON(event))
864 return regulator_enable(w->priv);
866 return regulator_disable_deferred(w->priv, w->shift);
868 EXPORT_SYMBOL_GPL(dapm_regulator_event);
870 static int dapm_widget_power_check(struct snd_soc_dapm_widget *w)
872 if (w->power_checked)
878 w->new_power = w->power_check(w);
880 w->power_checked = true;
885 /* Generic check to see if a widget should be powered.
887 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
891 DAPM_UPDATE_STAT(w, power_checks);
893 in = is_connected_input_ep(w);
894 dapm_clear_walk(w->dapm);
895 out = is_connected_output_ep(w);
896 dapm_clear_walk(w->dapm);
897 return out != 0 && in != 0;
900 static int dapm_dai_check_power(struct snd_soc_dapm_widget *w)
902 DAPM_UPDATE_STAT(w, power_checks);
907 /* Check to see if an ADC has power */
908 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
912 DAPM_UPDATE_STAT(w, power_checks);
915 in = is_connected_input_ep(w);
916 dapm_clear_walk(w->dapm);
919 return dapm_generic_check_power(w);
923 /* Check to see if a DAC has power */
924 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
928 DAPM_UPDATE_STAT(w, power_checks);
931 out = is_connected_output_ep(w);
932 dapm_clear_walk(w->dapm);
935 return dapm_generic_check_power(w);
939 /* Check to see if a power supply is needed */
940 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
942 struct snd_soc_dapm_path *path;
944 DAPM_UPDATE_STAT(w, power_checks);
946 /* Check if one of our outputs is connected */
947 list_for_each_entry(path, &w->sinks, list_source) {
948 DAPM_UPDATE_STAT(w, neighbour_checks);
953 if (path->connected &&
954 !path->connected(path->source, path->sink))
960 if (dapm_widget_power_check(path->sink))
964 dapm_clear_walk(w->dapm);
969 static int dapm_always_on_check_power(struct snd_soc_dapm_widget *w)
974 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
975 struct snd_soc_dapm_widget *b,
983 sort = dapm_down_seq;
985 if (sort[a->id] != sort[b->id])
986 return sort[a->id] - sort[b->id];
987 if (a->subseq != b->subseq) {
989 return a->subseq - b->subseq;
991 return b->subseq - a->subseq;
993 if (a->reg != b->reg)
994 return a->reg - b->reg;
995 if (a->dapm != b->dapm)
996 return (unsigned long)a->dapm - (unsigned long)b->dapm;
1001 /* Insert a widget in order into a DAPM power sequence. */
1002 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
1003 struct list_head *list,
1006 struct snd_soc_dapm_widget *w;
1008 list_for_each_entry(w, list, power_list)
1009 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
1010 list_add_tail(&new_widget->power_list, &w->power_list);
1014 list_add_tail(&new_widget->power_list, list);
1017 static void dapm_seq_check_event(struct snd_soc_dapm_context *dapm,
1018 struct snd_soc_dapm_widget *w, int event)
1020 struct snd_soc_card *card = dapm->card;
1021 const char *ev_name;
1025 case SND_SOC_DAPM_PRE_PMU:
1026 ev_name = "PRE_PMU";
1029 case SND_SOC_DAPM_POST_PMU:
1030 ev_name = "POST_PMU";
1033 case SND_SOC_DAPM_PRE_PMD:
1034 ev_name = "PRE_PMD";
1037 case SND_SOC_DAPM_POST_PMD:
1038 ev_name = "POST_PMD";
1046 if (w->power != power)
1049 if (w->event && (w->event_flags & event)) {
1050 pop_dbg(dapm->dev, card->pop_time, "pop test : %s %s\n",
1052 trace_snd_soc_dapm_widget_event_start(w, event);
1053 ret = w->event(w, NULL, event);
1054 trace_snd_soc_dapm_widget_event_done(w, event);
1056 pr_err("%s: %s event failed: %d\n",
1057 ev_name, w->name, ret);
1061 /* Apply the coalesced changes from a DAPM sequence */
1062 static void dapm_seq_run_coalesced(struct snd_soc_dapm_context *dapm,
1063 struct list_head *pending)
1065 struct snd_soc_card *card = dapm->card;
1066 struct snd_soc_dapm_widget *w;
1068 unsigned int value = 0;
1069 unsigned int mask = 0;
1070 unsigned int cur_mask;
1072 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
1075 list_for_each_entry(w, pending, power_list) {
1076 cur_mask = 1 << w->shift;
1077 BUG_ON(reg != w->reg);
1088 pop_dbg(dapm->dev, card->pop_time,
1089 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
1090 w->name, reg, value, mask);
1092 /* Check for events */
1093 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMU);
1094 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMD);
1098 /* Any widget will do, they should all be updating the
1101 w = list_first_entry(pending, struct snd_soc_dapm_widget,
1104 pop_dbg(dapm->dev, card->pop_time,
1105 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
1106 value, mask, reg, card->pop_time);
1107 pop_wait(card->pop_time);
1108 soc_widget_update_bits(w, reg, mask, value);
1111 list_for_each_entry(w, pending, power_list) {
1112 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMU);
1113 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMD);
1117 /* Apply a DAPM power sequence.
1119 * We walk over a pre-sorted list of widgets to apply power to. In
1120 * order to minimise the number of writes to the device required
1121 * multiple widgets will be updated in a single write where possible.
1122 * Currently anything that requires more than a single write is not
1125 static void dapm_seq_run(struct snd_soc_dapm_context *dapm,
1126 struct list_head *list, int event, bool power_up)
1128 struct snd_soc_dapm_widget *w, *n;
1131 int cur_subseq = -1;
1132 int cur_reg = SND_SOC_NOPM;
1133 struct snd_soc_dapm_context *cur_dapm = NULL;
1140 sort = dapm_down_seq;
1142 list_for_each_entry_safe(w, n, list, power_list) {
1145 /* Do we need to apply any queued changes? */
1146 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
1147 w->dapm != cur_dapm || w->subseq != cur_subseq) {
1148 if (!list_empty(&pending))
1149 dapm_seq_run_coalesced(cur_dapm, &pending);
1151 if (cur_dapm && cur_dapm->seq_notifier) {
1152 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1153 if (sort[i] == cur_sort)
1154 cur_dapm->seq_notifier(cur_dapm,
1159 INIT_LIST_HEAD(&pending);
1161 cur_subseq = INT_MIN;
1162 cur_reg = SND_SOC_NOPM;
1167 case snd_soc_dapm_pre:
1169 list_for_each_entry_safe_continue(w, n, list,
1172 if (event == SND_SOC_DAPM_STREAM_START)
1174 NULL, SND_SOC_DAPM_PRE_PMU);
1175 else if (event == SND_SOC_DAPM_STREAM_STOP)
1177 NULL, SND_SOC_DAPM_PRE_PMD);
1180 case snd_soc_dapm_post:
1182 list_for_each_entry_safe_continue(w, n, list,
1185 if (event == SND_SOC_DAPM_STREAM_START)
1187 NULL, SND_SOC_DAPM_POST_PMU);
1188 else if (event == SND_SOC_DAPM_STREAM_STOP)
1190 NULL, SND_SOC_DAPM_POST_PMD);
1194 /* Queue it up for application */
1195 cur_sort = sort[w->id];
1196 cur_subseq = w->subseq;
1199 list_move(&w->power_list, &pending);
1204 dev_err(w->dapm->dev,
1205 "Failed to apply widget power: %d\n", ret);
1208 if (!list_empty(&pending))
1209 dapm_seq_run_coalesced(cur_dapm, &pending);
1211 if (cur_dapm && cur_dapm->seq_notifier) {
1212 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1213 if (sort[i] == cur_sort)
1214 cur_dapm->seq_notifier(cur_dapm,
1219 static void dapm_widget_update(struct snd_soc_dapm_context *dapm)
1221 struct snd_soc_dapm_update *update = dapm->update;
1222 struct snd_soc_dapm_widget *w;
1231 (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
1232 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
1234 pr_err("%s DAPM pre-event failed: %d\n",
1238 ret = snd_soc_update_bits(w->codec, update->reg, update->mask,
1241 pr_err("%s DAPM update failed: %d\n", w->name, ret);
1244 (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1245 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1247 pr_err("%s DAPM post-event failed: %d\n",
1252 /* Async callback run prior to DAPM sequences - brings to _PREPARE if
1253 * they're changing state.
1255 static void dapm_pre_sequence_async(void *data, async_cookie_t cookie)
1257 struct snd_soc_dapm_context *d = data;
1260 /* If we're off and we're not supposed to be go into STANDBY */
1261 if (d->bias_level == SND_SOC_BIAS_OFF &&
1262 d->target_bias_level != SND_SOC_BIAS_OFF) {
1264 pm_runtime_get_sync(d->dev);
1266 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1269 "Failed to turn on bias: %d\n", ret);
1272 /* Prepare for a STADDBY->ON or ON->STANDBY transition */
1273 if (d->bias_level != d->target_bias_level) {
1274 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);
1277 "Failed to prepare bias: %d\n", ret);
1281 /* Async callback run prior to DAPM sequences - brings to their final
1284 static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
1286 struct snd_soc_dapm_context *d = data;
1289 /* If we just powered the last thing off drop to standby bias */
1290 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1291 (d->target_bias_level == SND_SOC_BIAS_STANDBY ||
1292 d->target_bias_level == SND_SOC_BIAS_OFF)) {
1293 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1295 dev_err(d->dev, "Failed to apply standby bias: %d\n",
1299 /* If we're in standby and can support bias off then do that */
1300 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1301 d->target_bias_level == SND_SOC_BIAS_OFF) {
1302 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);
1304 dev_err(d->dev, "Failed to turn off bias: %d\n", ret);
1307 pm_runtime_put(d->dev);
1310 /* If we just powered up then move to active bias */
1311 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1312 d->target_bias_level == SND_SOC_BIAS_ON) {
1313 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);
1315 dev_err(d->dev, "Failed to apply active bias: %d\n",
1320 static void dapm_widget_set_peer_power(struct snd_soc_dapm_widget *peer,
1321 bool power, bool connect)
1323 /* If a connection is being made or broken then that update
1324 * will have marked the peer dirty, otherwise the widgets are
1325 * not connected and this update has no impact. */
1329 /* If the peer is already in the state we're moving to then we
1330 * won't have an impact on it. */
1331 if (power != peer->power)
1332 dapm_mark_dirty(peer, "peer state change");
1335 static void dapm_widget_set_power(struct snd_soc_dapm_widget *w, bool power,
1336 struct list_head *up_list,
1337 struct list_head *down_list)
1339 struct snd_soc_dapm_path *path;
1341 if (w->power == power)
1344 trace_snd_soc_dapm_widget_power(w, power);
1346 /* If we changed our power state perhaps our neigbours changed
1349 list_for_each_entry(path, &w->sources, list_sink) {
1351 dapm_widget_set_peer_power(path->source, power,
1356 case snd_soc_dapm_supply:
1357 case snd_soc_dapm_regulator_supply:
1358 /* Supplies can't affect their outputs, only their inputs */
1361 list_for_each_entry(path, &w->sinks, list_source) {
1363 dapm_widget_set_peer_power(path->sink, power,
1371 dapm_seq_insert(w, up_list, true);
1373 dapm_seq_insert(w, down_list, false);
1378 static void dapm_power_one_widget(struct snd_soc_dapm_widget *w,
1379 struct list_head *up_list,
1380 struct list_head *down_list)
1385 case snd_soc_dapm_pre:
1386 dapm_seq_insert(w, down_list, false);
1388 case snd_soc_dapm_post:
1389 dapm_seq_insert(w, up_list, true);
1393 power = dapm_widget_power_check(w);
1395 dapm_widget_set_power(w, power, up_list, down_list);
1401 * Scan each dapm widget for complete audio path.
1402 * A complete path is a route that has valid endpoints i.e.:-
1404 * o DAC to output pin.
1405 * o Input Pin to ADC.
1406 * o Input pin to Output pin (bypass, sidetone)
1407 * o DAC to ADC (loopback).
1409 static int dapm_power_widgets(struct snd_soc_dapm_context *dapm, int event)
1411 struct snd_soc_card *card = dapm->card;
1412 struct snd_soc_dapm_widget *w;
1413 struct snd_soc_dapm_context *d;
1415 LIST_HEAD(down_list);
1416 LIST_HEAD(async_domain);
1417 enum snd_soc_bias_level bias;
1419 trace_snd_soc_dapm_start(card);
1421 list_for_each_entry(d, &card->dapm_list, list) {
1422 if (d->n_widgets || d->codec == NULL) {
1423 if (d->idle_bias_off)
1424 d->target_bias_level = SND_SOC_BIAS_OFF;
1426 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1432 /* Check which widgets we need to power and store them in
1433 * lists indicating if they should be powered up or down. We
1434 * only check widgets that have been flagged as dirty but note
1435 * that new widgets may be added to the dirty list while we
1438 list_for_each_entry(w, &card->dapm_dirty, dirty) {
1439 dapm_power_one_widget(w, &up_list, &down_list);
1442 list_for_each_entry(w, &card->widgets, list) {
1443 list_del_init(&w->dirty);
1448 /* Supplies and micbiases only bring the
1449 * context up to STANDBY as unless something
1450 * else is active and passing audio they
1451 * generally don't require full power. Signal
1452 * generators are virtual pins and have no
1453 * power impact themselves.
1456 case snd_soc_dapm_siggen:
1458 case snd_soc_dapm_supply:
1459 case snd_soc_dapm_regulator_supply:
1460 case snd_soc_dapm_micbias:
1461 if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
1462 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1465 d->target_bias_level = SND_SOC_BIAS_ON;
1472 /* If there are no DAPM widgets then try to figure out power from the
1475 if (!dapm->n_widgets) {
1477 case SND_SOC_DAPM_STREAM_START:
1478 case SND_SOC_DAPM_STREAM_RESUME:
1479 dapm->target_bias_level = SND_SOC_BIAS_ON;
1481 case SND_SOC_DAPM_STREAM_STOP:
1482 if (dapm->codec && dapm->codec->active)
1483 dapm->target_bias_level = SND_SOC_BIAS_ON;
1485 dapm->target_bias_level = SND_SOC_BIAS_STANDBY;
1487 case SND_SOC_DAPM_STREAM_SUSPEND:
1488 dapm->target_bias_level = SND_SOC_BIAS_STANDBY;
1490 case SND_SOC_DAPM_STREAM_NOP:
1491 dapm->target_bias_level = dapm->bias_level;
1498 /* Force all contexts in the card to the same bias state if
1499 * they're not ground referenced.
1501 bias = SND_SOC_BIAS_OFF;
1502 list_for_each_entry(d, &card->dapm_list, list)
1503 if (d->target_bias_level > bias)
1504 bias = d->target_bias_level;
1505 list_for_each_entry(d, &card->dapm_list, list)
1506 if (!d->idle_bias_off)
1507 d->target_bias_level = bias;
1509 trace_snd_soc_dapm_walk_done(card);
1511 /* Run all the bias changes in parallel */
1512 list_for_each_entry(d, &dapm->card->dapm_list, list)
1513 async_schedule_domain(dapm_pre_sequence_async, d,
1515 async_synchronize_full_domain(&async_domain);
1517 /* Power down widgets first; try to avoid amplifying pops. */
1518 dapm_seq_run(dapm, &down_list, event, false);
1520 dapm_widget_update(dapm);
1523 dapm_seq_run(dapm, &up_list, event, true);
1525 /* Run all the bias changes in parallel */
1526 list_for_each_entry(d, &dapm->card->dapm_list, list)
1527 async_schedule_domain(dapm_post_sequence_async, d,
1529 async_synchronize_full_domain(&async_domain);
1531 /* do we need to notify any clients that DAPM event is complete */
1532 list_for_each_entry(d, &card->dapm_list, list) {
1533 if (d->stream_event)
1534 d->stream_event(d, event);
1537 pop_dbg(dapm->dev, card->pop_time,
1538 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
1539 pop_wait(card->pop_time);
1541 trace_snd_soc_dapm_done(card);
1546 #ifdef CONFIG_DEBUG_FS
1547 static int dapm_widget_power_open_file(struct inode *inode, struct file *file)
1549 file->private_data = inode->i_private;
1553 static ssize_t dapm_widget_power_read_file(struct file *file,
1554 char __user *user_buf,
1555 size_t count, loff_t *ppos)
1557 struct snd_soc_dapm_widget *w = file->private_data;
1561 struct snd_soc_dapm_path *p = NULL;
1563 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1567 in = is_connected_input_ep(w);
1568 dapm_clear_walk(w->dapm);
1569 out = is_connected_output_ep(w);
1570 dapm_clear_walk(w->dapm);
1572 ret = snprintf(buf, PAGE_SIZE, "%s: %s%s in %d out %d",
1573 w->name, w->power ? "On" : "Off",
1574 w->force ? " (forced)" : "", in, out);
1577 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1578 " - R%d(0x%x) bit %d",
1579 w->reg, w->reg, w->shift);
1581 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1584 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1586 w->active ? "active" : "inactive");
1588 list_for_each_entry(p, &w->sources, list_sink) {
1589 if (p->connected && !p->connected(w, p->sink))
1593 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1594 " in \"%s\" \"%s\"\n",
1595 p->name ? p->name : "static",
1598 list_for_each_entry(p, &w->sinks, list_source) {
1599 if (p->connected && !p->connected(w, p->sink))
1603 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1604 " out \"%s\" \"%s\"\n",
1605 p->name ? p->name : "static",
1609 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1615 static const struct file_operations dapm_widget_power_fops = {
1616 .open = dapm_widget_power_open_file,
1617 .read = dapm_widget_power_read_file,
1618 .llseek = default_llseek,
1621 static int dapm_bias_open_file(struct inode *inode, struct file *file)
1623 file->private_data = inode->i_private;
1627 static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
1628 size_t count, loff_t *ppos)
1630 struct snd_soc_dapm_context *dapm = file->private_data;
1633 switch (dapm->bias_level) {
1634 case SND_SOC_BIAS_ON:
1637 case SND_SOC_BIAS_PREPARE:
1638 level = "Prepare\n";
1640 case SND_SOC_BIAS_STANDBY:
1641 level = "Standby\n";
1643 case SND_SOC_BIAS_OFF:
1648 level = "Unknown\n";
1652 return simple_read_from_buffer(user_buf, count, ppos, level,
1656 static const struct file_operations dapm_bias_fops = {
1657 .open = dapm_bias_open_file,
1658 .read = dapm_bias_read_file,
1659 .llseek = default_llseek,
1662 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1663 struct dentry *parent)
1667 dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
1669 if (!dapm->debugfs_dapm) {
1671 "Failed to create DAPM debugfs directory\n");
1675 d = debugfs_create_file("bias_level", 0444,
1676 dapm->debugfs_dapm, dapm,
1680 "ASoC: Failed to create bias level debugfs file\n");
1683 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1685 struct snd_soc_dapm_context *dapm = w->dapm;
1688 if (!dapm->debugfs_dapm || !w->name)
1691 d = debugfs_create_file(w->name, 0444,
1692 dapm->debugfs_dapm, w,
1693 &dapm_widget_power_fops);
1695 dev_warn(w->dapm->dev,
1696 "ASoC: Failed to create %s debugfs file\n",
1700 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1702 debugfs_remove_recursive(dapm->debugfs_dapm);
1706 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1707 struct dentry *parent)
1711 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1715 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1721 /* test and update the power status of a mux widget */
1722 int snd_soc_dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1723 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e)
1725 struct snd_soc_dapm_path *path;
1728 if (widget->id != snd_soc_dapm_mux &&
1729 widget->id != snd_soc_dapm_virt_mux &&
1730 widget->id != snd_soc_dapm_value_mux)
1733 /* find dapm widget path assoc with kcontrol */
1734 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1735 if (path->kcontrol != kcontrol)
1738 if (!path->name || !e->texts[mux])
1742 /* we now need to match the string in the enum to the path */
1743 if (!(strcmp(path->name, e->texts[mux]))) {
1744 path->connect = 1; /* new connection */
1745 dapm_mark_dirty(path->source, "mux connection");
1748 dapm_mark_dirty(path->source,
1749 "mux disconnection");
1750 path->connect = 0; /* old connection must be powered down */
1755 dapm_mark_dirty(widget, "mux change");
1756 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1761 EXPORT_SYMBOL_GPL(snd_soc_dapm_mux_update_power);
1763 /* test and update the power status of a mixer or switch widget */
1764 int snd_soc_dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1765 struct snd_kcontrol *kcontrol, int connect)
1767 struct snd_soc_dapm_path *path;
1770 if (widget->id != snd_soc_dapm_mixer &&
1771 widget->id != snd_soc_dapm_mixer_named_ctl &&
1772 widget->id != snd_soc_dapm_switch)
1775 /* find dapm widget path assoc with kcontrol */
1776 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1777 if (path->kcontrol != kcontrol)
1780 /* found, now check type */
1782 path->connect = connect;
1783 dapm_mark_dirty(path->source, "mixer connection");
1787 dapm_mark_dirty(widget, "mixer update");
1788 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1793 EXPORT_SYMBOL_GPL(snd_soc_dapm_mixer_update_power);
1795 /* show dapm widget status in sys fs */
1796 static ssize_t dapm_widget_show(struct device *dev,
1797 struct device_attribute *attr, char *buf)
1799 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
1800 struct snd_soc_codec *codec =rtd->codec;
1801 struct snd_soc_dapm_widget *w;
1803 char *state = "not set";
1805 list_for_each_entry(w, &codec->card->widgets, list) {
1806 if (w->dapm != &codec->dapm)
1809 /* only display widgets that burnm power */
1811 case snd_soc_dapm_hp:
1812 case snd_soc_dapm_mic:
1813 case snd_soc_dapm_spk:
1814 case snd_soc_dapm_line:
1815 case snd_soc_dapm_micbias:
1816 case snd_soc_dapm_dac:
1817 case snd_soc_dapm_adc:
1818 case snd_soc_dapm_pga:
1819 case snd_soc_dapm_out_drv:
1820 case snd_soc_dapm_mixer:
1821 case snd_soc_dapm_mixer_named_ctl:
1822 case snd_soc_dapm_supply:
1823 case snd_soc_dapm_regulator_supply:
1825 count += sprintf(buf + count, "%s: %s\n",
1826 w->name, w->power ? "On":"Off");
1833 switch (codec->dapm.bias_level) {
1834 case SND_SOC_BIAS_ON:
1837 case SND_SOC_BIAS_PREPARE:
1840 case SND_SOC_BIAS_STANDBY:
1843 case SND_SOC_BIAS_OFF:
1847 count += sprintf(buf + count, "PM State: %s\n", state);
1852 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
1854 int snd_soc_dapm_sys_add(struct device *dev)
1856 return device_create_file(dev, &dev_attr_dapm_widget);
1859 static void snd_soc_dapm_sys_remove(struct device *dev)
1861 device_remove_file(dev, &dev_attr_dapm_widget);
1864 /* free all dapm widgets and resources */
1865 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
1867 struct snd_soc_dapm_widget *w, *next_w;
1868 struct snd_soc_dapm_path *p, *next_p;
1870 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
1871 if (w->dapm != dapm)
1875 * remove source and sink paths associated to this widget.
1876 * While removing the path, remove reference to it from both
1877 * source and sink widgets so that path is removed only once.
1879 list_for_each_entry_safe(p, next_p, &w->sources, list_sink) {
1880 list_del(&p->list_sink);
1881 list_del(&p->list_source);
1883 kfree(p->long_name);
1886 list_for_each_entry_safe(p, next_p, &w->sinks, list_source) {
1887 list_del(&p->list_sink);
1888 list_del(&p->list_source);
1890 kfree(p->long_name);
1893 kfree(w->kcontrols);
1899 static struct snd_soc_dapm_widget *dapm_find_widget(
1900 struct snd_soc_dapm_context *dapm, const char *pin,
1901 bool search_other_contexts)
1903 struct snd_soc_dapm_widget *w;
1904 struct snd_soc_dapm_widget *fallback = NULL;
1906 list_for_each_entry(w, &dapm->card->widgets, list) {
1907 if (!strcmp(w->name, pin)) {
1908 if (w->dapm == dapm)
1915 if (search_other_contexts)
1921 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
1922 const char *pin, int status)
1924 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
1927 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
1931 if (w->connected != status)
1932 dapm_mark_dirty(w, "pin configuration");
1934 w->connected = status;
1942 * snd_soc_dapm_sync - scan and power dapm paths
1943 * @dapm: DAPM context
1945 * Walks all dapm audio paths and powers widgets according to their
1946 * stream or path usage.
1948 * Returns 0 for success.
1950 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
1955 * Suppress early reports (eg, jacks syncing their state) to avoid
1956 * silly DAPM runs during card startup.
1958 if (!dapm->card || !dapm->card->instantiated)
1961 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_PCM);
1962 ret = dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
1963 mutex_unlock(&dapm->card->dapm_mutex);
1966 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
1968 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
1969 const struct snd_soc_dapm_route *route)
1971 struct snd_soc_dapm_path *path;
1972 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
1973 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
1975 const char *control = route->control;
1977 char prefixed_sink[80];
1978 char prefixed_source[80];
1981 if (dapm->codec && dapm->codec->name_prefix) {
1982 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
1983 dapm->codec->name_prefix, route->sink);
1984 sink = prefixed_sink;
1985 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
1986 dapm->codec->name_prefix, route->source);
1987 source = prefixed_source;
1990 source = route->source;
1994 * find src and dest widgets over all widgets but favor a widget from
1995 * current DAPM context
1997 list_for_each_entry(w, &dapm->card->widgets, list) {
1998 if (!wsink && !(strcmp(w->name, sink))) {
2000 if (w->dapm == dapm)
2004 if (!wsource && !(strcmp(w->name, source))) {
2006 if (w->dapm == dapm)
2010 /* use widget from another DAPM context if not found from this */
2016 if (wsource == NULL || wsink == NULL)
2019 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
2023 path->source = wsource;
2025 path->connected = route->connected;
2026 INIT_LIST_HEAD(&path->list);
2027 INIT_LIST_HEAD(&path->list_source);
2028 INIT_LIST_HEAD(&path->list_sink);
2030 /* check for external widgets */
2031 if (wsink->id == snd_soc_dapm_input) {
2032 if (wsource->id == snd_soc_dapm_micbias ||
2033 wsource->id == snd_soc_dapm_mic ||
2034 wsource->id == snd_soc_dapm_line ||
2035 wsource->id == snd_soc_dapm_output)
2038 if (wsource->id == snd_soc_dapm_output) {
2039 if (wsink->id == snd_soc_dapm_spk ||
2040 wsink->id == snd_soc_dapm_hp ||
2041 wsink->id == snd_soc_dapm_line ||
2042 wsink->id == snd_soc_dapm_input)
2046 /* connect static paths */
2047 if (control == NULL) {
2048 list_add(&path->list, &dapm->card->paths);
2049 list_add(&path->list_sink, &wsink->sources);
2050 list_add(&path->list_source, &wsource->sinks);
2055 /* connect dynamic paths */
2056 switch (wsink->id) {
2057 case snd_soc_dapm_adc:
2058 case snd_soc_dapm_dac:
2059 case snd_soc_dapm_pga:
2060 case snd_soc_dapm_out_drv:
2061 case snd_soc_dapm_input:
2062 case snd_soc_dapm_output:
2063 case snd_soc_dapm_siggen:
2064 case snd_soc_dapm_micbias:
2065 case snd_soc_dapm_vmid:
2066 case snd_soc_dapm_pre:
2067 case snd_soc_dapm_post:
2068 case snd_soc_dapm_supply:
2069 case snd_soc_dapm_regulator_supply:
2070 case snd_soc_dapm_aif_in:
2071 case snd_soc_dapm_aif_out:
2072 case snd_soc_dapm_dai:
2073 list_add(&path->list, &dapm->card->paths);
2074 list_add(&path->list_sink, &wsink->sources);
2075 list_add(&path->list_source, &wsource->sinks);
2078 case snd_soc_dapm_mux:
2079 case snd_soc_dapm_virt_mux:
2080 case snd_soc_dapm_value_mux:
2081 ret = dapm_connect_mux(dapm, wsource, wsink, path, control,
2082 &wsink->kcontrol_news[0]);
2086 case snd_soc_dapm_switch:
2087 case snd_soc_dapm_mixer:
2088 case snd_soc_dapm_mixer_named_ctl:
2089 ret = dapm_connect_mixer(dapm, wsource, wsink, path, control);
2093 case snd_soc_dapm_hp:
2094 case snd_soc_dapm_mic:
2095 case snd_soc_dapm_line:
2096 case snd_soc_dapm_spk:
2097 list_add(&path->list, &dapm->card->paths);
2098 list_add(&path->list_sink, &wsink->sources);
2099 list_add(&path->list_source, &wsource->sinks);
2106 dev_warn(dapm->dev, "asoc: no dapm match for %s --> %s --> %s\n",
2107 source, control, sink);
2113 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
2114 * @dapm: DAPM context
2115 * @route: audio routes
2116 * @num: number of routes
2118 * Connects 2 dapm widgets together via a named audio path. The sink is
2119 * the widget receiving the audio signal, whilst the source is the sender
2120 * of the audio signal.
2122 * Returns 0 for success else error. On error all resources can be freed
2123 * with a call to snd_soc_card_free().
2125 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
2126 const struct snd_soc_dapm_route *route, int num)
2130 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2131 for (i = 0; i < num; i++) {
2132 ret = snd_soc_dapm_add_route(dapm, route);
2134 dev_err(dapm->dev, "Failed to add route %s->%s\n",
2135 route->source, route->sink);
2140 mutex_unlock(&dapm->card->dapm_mutex);
2144 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
2146 static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm,
2147 const struct snd_soc_dapm_route *route)
2149 struct snd_soc_dapm_widget *source = dapm_find_widget(dapm,
2152 struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm,
2155 struct snd_soc_dapm_path *path;
2159 dev_err(dapm->dev, "Unable to find source %s for weak route\n",
2165 dev_err(dapm->dev, "Unable to find sink %s for weak route\n",
2170 if (route->control || route->connected)
2171 dev_warn(dapm->dev, "Ignoring control for weak route %s->%s\n",
2172 route->source, route->sink);
2174 list_for_each_entry(path, &source->sinks, list_source) {
2175 if (path->sink == sink) {
2182 dev_err(dapm->dev, "No path found for weak route %s->%s\n",
2183 route->source, route->sink);
2185 dev_warn(dapm->dev, "%d paths found for weak route %s->%s\n",
2186 count, route->source, route->sink);
2192 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
2193 * @dapm: DAPM context
2194 * @route: audio routes
2195 * @num: number of routes
2197 * Mark existing routes matching those specified in the passed array
2198 * as being weak, meaning that they are ignored for the purpose of
2199 * power decisions. The main intended use case is for sidetone paths
2200 * which couple audio between other independent paths if they are both
2201 * active in order to make the combination work better at the user
2202 * level but which aren't intended to be "used".
2204 * Note that CODEC drivers should not use this as sidetone type paths
2205 * can frequently also be used as bypass paths.
2207 int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm,
2208 const struct snd_soc_dapm_route *route, int num)
2213 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2214 for (i = 0; i < num; i++) {
2215 err = snd_soc_dapm_weak_route(dapm, route);
2220 mutex_unlock(&dapm->card->dapm_mutex);
2224 EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes);
2227 * snd_soc_dapm_new_widgets - add new dapm widgets
2228 * @dapm: DAPM context
2230 * Checks the codec for any new dapm widgets and creates them if found.
2232 * Returns 0 for success.
2234 int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context *dapm)
2236 struct snd_soc_dapm_widget *w;
2239 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2241 list_for_each_entry(w, &dapm->card->widgets, list)
2246 if (w->num_kcontrols) {
2247 w->kcontrols = kzalloc(w->num_kcontrols *
2248 sizeof(struct snd_kcontrol *),
2250 if (!w->kcontrols) {
2251 mutex_unlock(&dapm->card->dapm_mutex);
2257 case snd_soc_dapm_switch:
2258 case snd_soc_dapm_mixer:
2259 case snd_soc_dapm_mixer_named_ctl:
2262 case snd_soc_dapm_mux:
2263 case snd_soc_dapm_virt_mux:
2264 case snd_soc_dapm_value_mux:
2267 case snd_soc_dapm_pga:
2268 case snd_soc_dapm_out_drv:
2275 /* Read the initial power state from the device */
2277 val = soc_widget_read(w, w->reg);
2278 val &= 1 << w->shift;
2288 dapm_mark_dirty(w, "new widget");
2289 dapm_debugfs_add_widget(w);
2292 dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
2293 mutex_unlock(&dapm->card->dapm_mutex);
2296 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
2299 * snd_soc_dapm_get_volsw - dapm mixer get callback
2300 * @kcontrol: mixer control
2301 * @ucontrol: control element information
2303 * Callback to get the value of a dapm mixer control.
2305 * Returns 0 for success.
2307 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
2308 struct snd_ctl_elem_value *ucontrol)
2310 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2311 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2312 struct soc_mixer_control *mc =
2313 (struct soc_mixer_control *)kcontrol->private_value;
2314 unsigned int reg = mc->reg;
2315 unsigned int shift = mc->shift;
2316 unsigned int rshift = mc->rshift;
2318 unsigned int invert = mc->invert;
2319 unsigned int mask = (1 << fls(max)) - 1;
2321 ucontrol->value.integer.value[0] =
2322 (snd_soc_read(widget->codec, reg) >> shift) & mask;
2323 if (shift != rshift)
2324 ucontrol->value.integer.value[1] =
2325 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
2327 ucontrol->value.integer.value[0] =
2328 max - ucontrol->value.integer.value[0];
2329 if (shift != rshift)
2330 ucontrol->value.integer.value[1] =
2331 max - ucontrol->value.integer.value[1];
2336 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
2339 * snd_soc_dapm_put_volsw - dapm mixer set callback
2340 * @kcontrol: mixer control
2341 * @ucontrol: control element information
2343 * Callback to set the value of a dapm mixer control.
2345 * Returns 0 for success.
2347 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
2348 struct snd_ctl_elem_value *ucontrol)
2350 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2351 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2352 struct snd_soc_codec *codec = widget->codec;
2353 struct snd_soc_card *card = codec->card;
2354 struct soc_mixer_control *mc =
2355 (struct soc_mixer_control *)kcontrol->private_value;
2356 unsigned int reg = mc->reg;
2357 unsigned int shift = mc->shift;
2359 unsigned int mask = (1 << fls(max)) - 1;
2360 unsigned int invert = mc->invert;
2362 int connect, change;
2363 struct snd_soc_dapm_update update;
2366 val = (ucontrol->value.integer.value[0] & mask);
2370 mask = mask << shift;
2374 /* new connection */
2375 connect = invert ? 0 : 1;
2377 /* old connection must be powered down */
2378 connect = invert ? 1 : 0;
2380 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_PCM);
2382 change = snd_soc_test_bits(widget->codec, reg, mask, val);
2384 for (wi = 0; wi < wlist->num_widgets; wi++) {
2385 widget = wlist->widgets[wi];
2387 widget->value = val;
2389 update.kcontrol = kcontrol;
2390 update.widget = widget;
2394 widget->dapm->update = &update;
2396 snd_soc_dapm_mixer_update_power(widget, kcontrol, connect);
2398 widget->dapm->update = NULL;
2402 mutex_unlock(&card->dapm_mutex);
2405 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
2408 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
2409 * @kcontrol: mixer control
2410 * @ucontrol: control element information
2412 * Callback to get the value of a dapm enumerated double mixer control.
2414 * Returns 0 for success.
2416 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
2417 struct snd_ctl_elem_value *ucontrol)
2419 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2420 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2421 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2422 unsigned int val, bitmask;
2424 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2426 val = snd_soc_read(widget->codec, e->reg);
2427 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
2428 if (e->shift_l != e->shift_r)
2429 ucontrol->value.enumerated.item[1] =
2430 (val >> e->shift_r) & (bitmask - 1);
2434 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
2437 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
2438 * @kcontrol: mixer control
2439 * @ucontrol: control element information
2441 * Callback to set the value of a dapm enumerated double mixer control.
2443 * Returns 0 for success.
2445 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
2446 struct snd_ctl_elem_value *ucontrol)
2448 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2449 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2450 struct snd_soc_codec *codec = widget->codec;
2451 struct snd_soc_card *card = codec->card;
2452 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2453 unsigned int val, mux, change;
2454 unsigned int mask, bitmask;
2455 struct snd_soc_dapm_update update;
2458 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2460 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2462 mux = ucontrol->value.enumerated.item[0];
2463 val = mux << e->shift_l;
2464 mask = (bitmask - 1) << e->shift_l;
2465 if (e->shift_l != e->shift_r) {
2466 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2468 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2469 mask |= (bitmask - 1) << e->shift_r;
2472 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_PCM);
2474 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2476 for (wi = 0; wi < wlist->num_widgets; wi++) {
2477 widget = wlist->widgets[wi];
2479 widget->value = val;
2481 update.kcontrol = kcontrol;
2482 update.widget = widget;
2483 update.reg = e->reg;
2486 widget->dapm->update = &update;
2488 snd_soc_dapm_mux_update_power(widget, kcontrol, mux, e);
2490 widget->dapm->update = NULL;
2494 mutex_unlock(&card->dapm_mutex);
2497 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
2500 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
2501 * @kcontrol: mixer control
2502 * @ucontrol: control element information
2504 * Returns 0 for success.
2506 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
2507 struct snd_ctl_elem_value *ucontrol)
2509 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2510 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2512 ucontrol->value.enumerated.item[0] = widget->value;
2516 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt);
2519 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
2520 * @kcontrol: mixer control
2521 * @ucontrol: control element information
2523 * Returns 0 for success.
2525 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
2526 struct snd_ctl_elem_value *ucontrol)
2528 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2529 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2530 struct snd_soc_codec *codec = widget->codec;
2531 struct snd_soc_card *card = codec->card;
2532 struct soc_enum *e =
2533 (struct soc_enum *)kcontrol->private_value;
2538 if (ucontrol->value.enumerated.item[0] >= e->max)
2541 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_PCM);
2543 change = widget->value != ucontrol->value.enumerated.item[0];
2545 for (wi = 0; wi < wlist->num_widgets; wi++) {
2546 widget = wlist->widgets[wi];
2548 widget->value = ucontrol->value.enumerated.item[0];
2550 snd_soc_dapm_mux_update_power(widget, kcontrol, widget->value, e);
2554 mutex_unlock(&card->dapm_mutex);
2557 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt);
2560 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
2562 * @kcontrol: mixer control
2563 * @ucontrol: control element information
2565 * Callback to get the value of a dapm semi enumerated double mixer control.
2567 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2568 * used for handling bitfield coded enumeration for example.
2570 * Returns 0 for success.
2572 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
2573 struct snd_ctl_elem_value *ucontrol)
2575 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2576 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2577 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2578 unsigned int reg_val, val, mux;
2580 reg_val = snd_soc_read(widget->codec, e->reg);
2581 val = (reg_val >> e->shift_l) & e->mask;
2582 for (mux = 0; mux < e->max; mux++) {
2583 if (val == e->values[mux])
2586 ucontrol->value.enumerated.item[0] = mux;
2587 if (e->shift_l != e->shift_r) {
2588 val = (reg_val >> e->shift_r) & e->mask;
2589 for (mux = 0; mux < e->max; mux++) {
2590 if (val == e->values[mux])
2593 ucontrol->value.enumerated.item[1] = mux;
2598 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
2601 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
2603 * @kcontrol: mixer control
2604 * @ucontrol: control element information
2606 * Callback to set the value of a dapm semi enumerated double mixer control.
2608 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2609 * used for handling bitfield coded enumeration for example.
2611 * Returns 0 for success.
2613 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
2614 struct snd_ctl_elem_value *ucontrol)
2616 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2617 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2618 struct snd_soc_codec *codec = widget->codec;
2619 struct snd_soc_card *card = codec->card;
2620 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2621 unsigned int val, mux, change;
2623 struct snd_soc_dapm_update update;
2626 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2628 mux = ucontrol->value.enumerated.item[0];
2629 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2630 mask = e->mask << e->shift_l;
2631 if (e->shift_l != e->shift_r) {
2632 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2634 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2635 mask |= e->mask << e->shift_r;
2638 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_PCM);
2640 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2642 for (wi = 0; wi < wlist->num_widgets; wi++) {
2643 widget = wlist->widgets[wi];
2645 widget->value = val;
2647 update.kcontrol = kcontrol;
2648 update.widget = widget;
2649 update.reg = e->reg;
2652 widget->dapm->update = &update;
2654 snd_soc_dapm_mux_update_power(widget, kcontrol, mux, e);
2656 widget->dapm->update = NULL;
2660 mutex_unlock(&card->dapm_mutex);
2663 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
2666 * snd_soc_dapm_info_pin_switch - Info for a pin switch
2668 * @kcontrol: mixer control
2669 * @uinfo: control element information
2671 * Callback to provide information about a pin switch control.
2673 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
2674 struct snd_ctl_elem_info *uinfo)
2676 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2678 uinfo->value.integer.min = 0;
2679 uinfo->value.integer.max = 1;
2683 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
2686 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
2688 * @kcontrol: mixer control
2691 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
2692 struct snd_ctl_elem_value *ucontrol)
2694 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
2695 const char *pin = (const char *)kcontrol->private_value;
2697 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_PCM);
2699 ucontrol->value.integer.value[0] =
2700 snd_soc_dapm_get_pin_status(&card->dapm, pin);
2702 mutex_unlock(&card->dapm_mutex);
2706 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
2709 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
2711 * @kcontrol: mixer control
2714 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
2715 struct snd_ctl_elem_value *ucontrol)
2717 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
2718 const char *pin = (const char *)kcontrol->private_value;
2720 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_PCM);
2722 if (ucontrol->value.integer.value[0])
2723 snd_soc_dapm_enable_pin(&card->dapm, pin);
2725 snd_soc_dapm_disable_pin(&card->dapm, pin);
2727 mutex_unlock(&card->dapm_mutex);
2729 snd_soc_dapm_sync(&card->dapm);
2732 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
2734 static struct snd_soc_dapm_widget *
2735 snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
2736 const struct snd_soc_dapm_widget *widget)
2738 struct snd_soc_dapm_widget *w;
2742 if ((w = dapm_cnew_widget(widget)) == NULL)
2746 case snd_soc_dapm_regulator_supply:
2747 w->priv = devm_regulator_get(dapm->dev, w->name);
2748 if (IS_ERR(w->priv)) {
2749 ret = PTR_ERR(w->priv);
2750 dev_err(dapm->dev, "Failed to request %s: %d\n",
2759 name_len = strlen(widget->name) + 1;
2760 if (dapm->codec && dapm->codec->name_prefix)
2761 name_len += 1 + strlen(dapm->codec->name_prefix);
2762 w->name = kmalloc(name_len, GFP_KERNEL);
2763 if (w->name == NULL) {
2767 if (dapm->codec && dapm->codec->name_prefix)
2768 snprintf((char *)w->name, name_len, "%s %s",
2769 dapm->codec->name_prefix, widget->name);
2771 snprintf((char *)w->name, name_len, "%s", widget->name);
2774 case snd_soc_dapm_switch:
2775 case snd_soc_dapm_mixer:
2776 case snd_soc_dapm_mixer_named_ctl:
2777 w->power_check = dapm_generic_check_power;
2779 case snd_soc_dapm_mux:
2780 case snd_soc_dapm_virt_mux:
2781 case snd_soc_dapm_value_mux:
2782 w->power_check = dapm_generic_check_power;
2784 case snd_soc_dapm_adc:
2785 case snd_soc_dapm_aif_out:
2786 w->power_check = dapm_adc_check_power;
2788 case snd_soc_dapm_dac:
2789 case snd_soc_dapm_aif_in:
2790 w->power_check = dapm_dac_check_power;
2792 case snd_soc_dapm_pga:
2793 case snd_soc_dapm_out_drv:
2794 case snd_soc_dapm_input:
2795 case snd_soc_dapm_output:
2796 case snd_soc_dapm_micbias:
2797 case snd_soc_dapm_spk:
2798 case snd_soc_dapm_hp:
2799 case snd_soc_dapm_mic:
2800 case snd_soc_dapm_line:
2801 w->power_check = dapm_generic_check_power;
2803 case snd_soc_dapm_supply:
2804 case snd_soc_dapm_regulator_supply:
2805 w->power_check = dapm_supply_check_power;
2807 case snd_soc_dapm_dai:
2808 w->power_check = dapm_dai_check_power;
2811 w->power_check = dapm_always_on_check_power;
2817 w->codec = dapm->codec;
2818 w->platform = dapm->platform;
2819 INIT_LIST_HEAD(&w->sources);
2820 INIT_LIST_HEAD(&w->sinks);
2821 INIT_LIST_HEAD(&w->list);
2822 INIT_LIST_HEAD(&w->dirty);
2823 list_add(&w->list, &dapm->card->widgets);
2825 /* machine layer set ups unconnected pins and insertions */
2831 * snd_soc_dapm_new_controls - create new dapm controls
2832 * @dapm: DAPM context
2833 * @widget: widget array
2834 * @num: number of widgets
2836 * Creates new DAPM controls based upon the templates.
2838 * Returns 0 for success else error.
2840 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
2841 const struct snd_soc_dapm_widget *widget,
2844 struct snd_soc_dapm_widget *w;
2847 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2848 for (i = 0; i < num; i++) {
2849 w = snd_soc_dapm_new_control(dapm, widget);
2852 "ASoC: Failed to create DAPM control %s\n",
2858 mutex_unlock(&dapm->card->dapm_mutex);
2861 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
2863 int snd_soc_dapm_new_dai_widgets(struct snd_soc_dapm_context *dapm,
2864 struct snd_soc_dai *dai)
2866 struct snd_soc_dapm_widget template;
2867 struct snd_soc_dapm_widget *w;
2869 WARN_ON(dapm->dev != dai->dev);
2871 memset(&template, 0, sizeof(template));
2872 template.reg = SND_SOC_NOPM;
2874 if (dai->driver->playback.stream_name) {
2875 template.id = snd_soc_dapm_dai;
2876 template.name = dai->driver->playback.stream_name;
2877 template.sname = dai->driver->playback.stream_name;
2879 dev_dbg(dai->dev, "adding %s widget\n",
2882 w = snd_soc_dapm_new_control(dapm, &template);
2884 dev_err(dapm->dev, "Failed to create %s widget\n",
2885 dai->driver->playback.stream_name);
2889 dai->playback_widget = w;
2892 if (dai->driver->capture.stream_name) {
2893 template.id = snd_soc_dapm_dai;
2894 template.name = dai->driver->capture.stream_name;
2895 template.sname = dai->driver->capture.stream_name;
2897 dev_dbg(dai->dev, "adding %s widget\n",
2900 w = snd_soc_dapm_new_control(dapm, &template);
2902 dev_err(dapm->dev, "Failed to create %s widget\n",
2903 dai->driver->capture.stream_name);
2907 dai->capture_widget = w;
2913 int snd_soc_dapm_link_dai_widgets(struct snd_soc_card *card)
2915 struct snd_soc_dapm_widget *dai_w, *w;
2916 struct snd_soc_dai *dai;
2917 struct snd_soc_dapm_route r;
2919 memset(&r, 0, sizeof(r));
2921 /* For each DAI widget... */
2922 list_for_each_entry(dai_w, &card->widgets, list) {
2923 if (dai_w->id != snd_soc_dapm_dai)
2928 /* ...find all widgets with the same stream and link them */
2929 list_for_each_entry(w, &card->widgets, list) {
2930 if (w->dapm != dai_w->dapm)
2933 if (w->id == snd_soc_dapm_dai)
2939 if (dai->driver->playback.stream_name &&
2941 dai->driver->playback.stream_name)) {
2942 r.source = dai->playback_widget->name;
2944 dev_dbg(dai->dev, "%s -> %s\n",
2947 snd_soc_dapm_add_route(w->dapm, &r);
2950 if (dai->driver->capture.stream_name &&
2952 dai->driver->capture.stream_name)) {
2954 r.sink = dai->capture_widget->name;
2955 dev_dbg(dai->dev, "%s -> %s\n",
2958 snd_soc_dapm_add_route(w->dapm, &r);
2966 static void soc_dapm_stream_event(struct snd_soc_dapm_context *dapm,
2967 int stream, struct snd_soc_dai *dai,
2970 struct snd_soc_dapm_widget *w;
2972 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
2973 w = dai->playback_widget;
2975 w = dai->capture_widget;
2980 dapm_mark_dirty(w, "stream event");
2983 case SND_SOC_DAPM_STREAM_START:
2986 case SND_SOC_DAPM_STREAM_STOP:
2989 case SND_SOC_DAPM_STREAM_SUSPEND:
2990 case SND_SOC_DAPM_STREAM_RESUME:
2991 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
2992 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
2996 dapm_power_widgets(dapm, event);
3000 * snd_soc_dapm_stream_event - send a stream event to the dapm core
3001 * @rtd: PCM runtime data
3002 * @stream: stream name
3003 * @event: stream event
3005 * Sends a stream event to the dapm core. The core then makes any
3006 * necessary widget power changes.
3008 * Returns 0 for success else error.
3010 int snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
3011 struct snd_soc_dai *dai, int event)
3013 struct snd_soc_card *card = rtd->card;
3015 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_PCM);
3016 soc_dapm_stream_event(&card->dapm, stream, dai, event);
3017 mutex_unlock(&card->dapm_mutex);
3022 * snd_soc_dapm_enable_pin - enable pin.
3023 * @dapm: DAPM context
3026 * Enables input/output pin and its parents or children widgets iff there is
3027 * a valid audio route and active audio stream.
3028 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3029 * do any widget power switching.
3031 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
3033 return snd_soc_dapm_set_pin(dapm, pin, 1);
3035 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
3038 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
3039 * @dapm: DAPM context
3042 * Enables input/output pin regardless of any other state. This is
3043 * intended for use with microphone bias supplies used in microphone
3046 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3047 * do any widget power switching.
3049 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
3052 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
3055 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
3059 dev_dbg(w->dapm->dev, "dapm: force enable pin %s\n", pin);
3062 dapm_mark_dirty(w, "force enable");
3066 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
3069 * snd_soc_dapm_disable_pin - disable pin.
3070 * @dapm: DAPM context
3073 * Disables input/output pin and its parents or children widgets.
3074 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3075 * do any widget power switching.
3077 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
3080 return snd_soc_dapm_set_pin(dapm, pin, 0);
3082 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
3085 * snd_soc_dapm_nc_pin - permanently disable pin.
3086 * @dapm: DAPM context
3089 * Marks the specified pin as being not connected, disabling it along
3090 * any parent or child widgets. At present this is identical to
3091 * snd_soc_dapm_disable_pin() but in future it will be extended to do
3092 * additional things such as disabling controls which only affect
3093 * paths through the pin.
3095 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3096 * do any widget power switching.
3098 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
3100 return snd_soc_dapm_set_pin(dapm, pin, 0);
3102 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
3105 * snd_soc_dapm_get_pin_status - get audio pin status
3106 * @dapm: DAPM context
3107 * @pin: audio signal pin endpoint (or start point)
3109 * Get audio pin status - connected or disconnected.
3111 * Returns 1 for connected otherwise 0.
3113 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
3116 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
3119 return w->connected;
3123 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
3126 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
3127 * @dapm: DAPM context
3128 * @pin: audio signal pin endpoint (or start point)
3130 * Mark the given endpoint or pin as ignoring suspend. When the
3131 * system is disabled a path between two endpoints flagged as ignoring
3132 * suspend will not be disabled. The path must already be enabled via
3133 * normal means at suspend time, it will not be turned on if it was not
3136 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
3139 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
3142 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
3146 w->ignore_suspend = 1;
3150 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
3152 static bool snd_soc_dapm_widget_in_card_paths(struct snd_soc_card *card,
3153 struct snd_soc_dapm_widget *w)
3155 struct snd_soc_dapm_path *p;
3157 list_for_each_entry(p, &card->paths, list) {
3158 if ((p->source == w) || (p->sink == w)) {
3160 "... Path %s(id:%d dapm:%p) - %s(id:%d dapm:%p)\n",
3161 p->source->name, p->source->id, p->source->dapm,
3162 p->sink->name, p->sink->id, p->sink->dapm);
3164 /* Connected to something other than the codec */
3165 if (p->source->dapm != p->sink->dapm)
3168 * Loopback connection from codec external pin to
3169 * codec external pin
3171 if (p->sink->id == snd_soc_dapm_input) {
3172 switch (p->source->id) {
3173 case snd_soc_dapm_output:
3174 case snd_soc_dapm_micbias:
3187 * snd_soc_dapm_auto_nc_codec_pins - call snd_soc_dapm_nc_pin for unused pins
3188 * @codec: The codec whose pins should be processed
3190 * Automatically call snd_soc_dapm_nc_pin() for any external pins in the codec
3191 * which are unused. Pins are used if they are connected externally to the
3192 * codec, whether that be to some other device, or a loop-back connection to
3195 void snd_soc_dapm_auto_nc_codec_pins(struct snd_soc_codec *codec)
3197 struct snd_soc_card *card = codec->card;
3198 struct snd_soc_dapm_context *dapm = &codec->dapm;
3199 struct snd_soc_dapm_widget *w;
3201 dev_dbg(codec->dev, "Auto NC: DAPMs: card:%p codec:%p\n",
3202 &card->dapm, &codec->dapm);
3204 list_for_each_entry(w, &card->widgets, list) {
3205 if (w->dapm != dapm)
3208 case snd_soc_dapm_input:
3209 case snd_soc_dapm_output:
3210 case snd_soc_dapm_micbias:
3211 dev_dbg(codec->dev, "Auto NC: Checking widget %s\n",
3213 if (!snd_soc_dapm_widget_in_card_paths(card, w)) {
3215 "... Not in map; disabling\n");
3216 snd_soc_dapm_nc_pin(dapm, w->name);
3226 * snd_soc_dapm_free - free dapm resources
3227 * @dapm: DAPM context
3229 * Free all dapm widgets and resources.
3231 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
3233 snd_soc_dapm_sys_remove(dapm->dev);
3234 dapm_debugfs_cleanup(dapm);
3235 dapm_free_widgets(dapm);
3236 list_del(&dapm->list);
3238 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
3240 static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context *dapm)
3242 struct snd_soc_dapm_widget *w;
3243 LIST_HEAD(down_list);
3246 list_for_each_entry(w, &dapm->card->widgets, list) {
3247 if (w->dapm != dapm)
3250 dapm_seq_insert(w, &down_list, false);
3256 /* If there were no widgets to power down we're already in
3260 if (dapm->bias_level == SND_SOC_BIAS_ON)
3261 snd_soc_dapm_set_bias_level(dapm,
3262 SND_SOC_BIAS_PREPARE);
3263 dapm_seq_run(dapm, &down_list, 0, false);
3264 if (dapm->bias_level == SND_SOC_BIAS_PREPARE)
3265 snd_soc_dapm_set_bias_level(dapm,
3266 SND_SOC_BIAS_STANDBY);
3271 * snd_soc_dapm_shutdown - callback for system shutdown
3273 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
3275 struct snd_soc_codec *codec;
3277 list_for_each_entry(codec, &card->codec_dev_list, list) {
3278 soc_dapm_shutdown_codec(&codec->dapm);
3279 if (codec->dapm.bias_level == SND_SOC_BIAS_STANDBY)
3280 snd_soc_dapm_set_bias_level(&codec->dapm,
3285 /* Module information */
3286 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3287 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
3288 MODULE_LICENSE("GPL");