2 * soc-dapm.c -- ALSA SoC Dynamic Audio Power Management
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
13 * o Changes power status of internal codec blocks depending on the
14 * dynamic configuration of codec internal audio paths and active
16 * o Platform power domain - can support external components i.e. amps and
17 * mic/meadphone insertion events.
18 * o Automatic Mic Bias support
19 * o Jack insertion power event initiation - e.g. hp insertion will enable
21 * o Delayed powerdown of audio susbsystem to reduce pops between a quick
25 * o DAPM power change sequencing - allow for configurable per
27 * o Support for analogue bias optimisation.
28 * o Support for reduced codec oversampling rates.
29 * o Support for reduced codec bias currents.
32 #include <linux/module.h>
33 #include <linux/moduleparam.h>
34 #include <linux/init.h>
35 #include <linux/async.h>
36 #include <linux/delay.h>
38 #include <linux/bitops.h>
39 #include <linux/platform_device.h>
40 #include <linux/jiffies.h>
41 #include <linux/debugfs.h>
42 #include <linux/slab.h>
43 #include <sound/core.h>
44 #include <sound/pcm.h>
45 #include <sound/pcm_params.h>
46 #include <sound/soc.h>
47 #include <sound/initval.h>
49 #include <trace/events/asoc.h>
51 #define DAPM_UPDATE_STAT(widget, val) widget->dapm->card->dapm_stats.val++;
53 /* dapm power sequences - make this per codec in the future */
54 static int dapm_up_seq[] = {
55 [snd_soc_dapm_pre] = 0,
56 [snd_soc_dapm_supply] = 1,
57 [snd_soc_dapm_micbias] = 2,
58 [snd_soc_dapm_aif_in] = 3,
59 [snd_soc_dapm_aif_out] = 3,
60 [snd_soc_dapm_mic] = 4,
61 [snd_soc_dapm_mux] = 5,
62 [snd_soc_dapm_virt_mux] = 5,
63 [snd_soc_dapm_value_mux] = 5,
64 [snd_soc_dapm_dac] = 6,
65 [snd_soc_dapm_mixer] = 7,
66 [snd_soc_dapm_mixer_named_ctl] = 7,
67 [snd_soc_dapm_pga] = 8,
68 [snd_soc_dapm_adc] = 9,
69 [snd_soc_dapm_out_drv] = 10,
70 [snd_soc_dapm_hp] = 10,
71 [snd_soc_dapm_spk] = 10,
72 [snd_soc_dapm_post] = 11,
75 static int dapm_down_seq[] = {
76 [snd_soc_dapm_pre] = 0,
77 [snd_soc_dapm_adc] = 1,
78 [snd_soc_dapm_hp] = 2,
79 [snd_soc_dapm_spk] = 2,
80 [snd_soc_dapm_out_drv] = 2,
81 [snd_soc_dapm_pga] = 4,
82 [snd_soc_dapm_mixer_named_ctl] = 5,
83 [snd_soc_dapm_mixer] = 5,
84 [snd_soc_dapm_dac] = 6,
85 [snd_soc_dapm_mic] = 7,
86 [snd_soc_dapm_micbias] = 8,
87 [snd_soc_dapm_mux] = 9,
88 [snd_soc_dapm_virt_mux] = 9,
89 [snd_soc_dapm_value_mux] = 9,
90 [snd_soc_dapm_aif_in] = 10,
91 [snd_soc_dapm_aif_out] = 10,
92 [snd_soc_dapm_supply] = 11,
93 [snd_soc_dapm_post] = 12,
96 static void pop_wait(u32 pop_time)
99 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
102 static void pop_dbg(struct device *dev, u32 pop_time, const char *fmt, ...)
110 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
115 vsnprintf(buf, PAGE_SIZE, fmt, args);
116 dev_info(dev, "%s", buf);
122 /* create a new dapm widget */
123 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
124 const struct snd_soc_dapm_widget *_widget)
126 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
129 /* get snd_card from DAPM context */
130 static inline struct snd_card *dapm_get_snd_card(
131 struct snd_soc_dapm_context *dapm)
134 return dapm->codec->card->snd_card;
135 else if (dapm->platform)
136 return dapm->platform->card->snd_card;
144 /* get soc_card from DAPM context */
145 static inline struct snd_soc_card *dapm_get_soc_card(
146 struct snd_soc_dapm_context *dapm)
149 return dapm->codec->card;
150 else if (dapm->platform)
151 return dapm->platform->card;
159 static int soc_widget_read(struct snd_soc_dapm_widget *w, int reg)
162 return snd_soc_read(w->codec, reg);
163 else if (w->platform)
164 return snd_soc_platform_read(w->platform, reg);
166 dev_err(w->dapm->dev, "no valid widget read method\n");
170 static int soc_widget_write(struct snd_soc_dapm_widget *w, int reg, int val)
173 return snd_soc_write(w->codec, reg, val);
174 else if (w->platform)
175 return snd_soc_platform_write(w->platform, reg, val);
177 dev_err(w->dapm->dev, "no valid widget write method\n");
181 static int soc_widget_update_bits(struct snd_soc_dapm_widget *w,
182 unsigned short reg, unsigned int mask, unsigned int value)
185 unsigned int old, new;
188 ret = soc_widget_read(w, reg);
193 new = (old & ~mask) | (value & mask);
196 ret = soc_widget_write(w, reg, new);
205 * snd_soc_dapm_set_bias_level - set the bias level for the system
206 * @dapm: DAPM context
207 * @level: level to configure
209 * Configure the bias (power) levels for the SoC audio device.
211 * Returns 0 for success else error.
213 static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm,
214 enum snd_soc_bias_level level)
216 struct snd_soc_card *card = dapm->card;
219 trace_snd_soc_bias_level_start(card, level);
221 if (card && card->set_bias_level)
222 ret = card->set_bias_level(card, dapm, level);
227 if (dapm->codec->driver->set_bias_level)
228 ret = dapm->codec->driver->set_bias_level(dapm->codec,
231 dapm->bias_level = level;
236 if (card && card->set_bias_level_post)
237 ret = card->set_bias_level_post(card, dapm, level);
239 trace_snd_soc_bias_level_done(card, level);
244 /* set up initial codec paths */
245 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
246 struct snd_soc_dapm_path *p, int i)
249 case snd_soc_dapm_switch:
250 case snd_soc_dapm_mixer:
251 case snd_soc_dapm_mixer_named_ctl: {
253 struct soc_mixer_control *mc = (struct soc_mixer_control *)
254 w->kcontrol_news[i].private_value;
255 unsigned int reg = mc->reg;
256 unsigned int shift = mc->shift;
258 unsigned int mask = (1 << fls(max)) - 1;
259 unsigned int invert = mc->invert;
261 val = soc_widget_read(w, reg);
262 val = (val >> shift) & mask;
264 if ((invert && !val) || (!invert && val))
270 case snd_soc_dapm_mux: {
271 struct soc_enum *e = (struct soc_enum *)
272 w->kcontrol_news[i].private_value;
273 int val, item, bitmask;
275 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
277 val = soc_widget_read(w, e->reg);
278 item = (val >> e->shift_l) & (bitmask - 1);
281 for (i = 0; i < e->max; i++) {
282 if (!(strcmp(p->name, e->texts[i])) && item == i)
287 case snd_soc_dapm_virt_mux: {
288 struct soc_enum *e = (struct soc_enum *)
289 w->kcontrol_news[i].private_value;
292 /* since a virtual mux has no backing registers to
293 * decide which path to connect, it will try to match
294 * with the first enumeration. This is to ensure
295 * that the default mux choice (the first) will be
296 * correctly powered up during initialization.
298 if (!strcmp(p->name, e->texts[0]))
302 case snd_soc_dapm_value_mux: {
303 struct soc_enum *e = (struct soc_enum *)
304 w->kcontrol_news[i].private_value;
307 val = soc_widget_read(w, e->reg);
308 val = (val >> e->shift_l) & e->mask;
309 for (item = 0; item < e->max; item++) {
310 if (val == e->values[item])
315 for (i = 0; i < e->max; i++) {
316 if (!(strcmp(p->name, e->texts[i])) && item == i)
321 /* does not effect routing - always connected */
322 case snd_soc_dapm_pga:
323 case snd_soc_dapm_out_drv:
324 case snd_soc_dapm_output:
325 case snd_soc_dapm_adc:
326 case snd_soc_dapm_input:
327 case snd_soc_dapm_dac:
328 case snd_soc_dapm_micbias:
329 case snd_soc_dapm_vmid:
330 case snd_soc_dapm_supply:
331 case snd_soc_dapm_aif_in:
332 case snd_soc_dapm_aif_out:
335 /* does effect routing - dynamically connected */
336 case snd_soc_dapm_hp:
337 case snd_soc_dapm_mic:
338 case snd_soc_dapm_spk:
339 case snd_soc_dapm_line:
340 case snd_soc_dapm_pre:
341 case snd_soc_dapm_post:
347 /* connect mux widget to its interconnecting audio paths */
348 static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
349 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
350 struct snd_soc_dapm_path *path, const char *control_name,
351 const struct snd_kcontrol_new *kcontrol)
353 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
356 for (i = 0; i < e->max; i++) {
357 if (!(strcmp(control_name, e->texts[i]))) {
358 list_add(&path->list, &dapm->card->paths);
359 list_add(&path->list_sink, &dest->sources);
360 list_add(&path->list_source, &src->sinks);
361 path->name = (char*)e->texts[i];
362 dapm_set_path_status(dest, path, 0);
370 /* connect mixer widget to its interconnecting audio paths */
371 static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
372 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
373 struct snd_soc_dapm_path *path, const char *control_name)
377 /* search for mixer kcontrol */
378 for (i = 0; i < dest->num_kcontrols; i++) {
379 if (!strcmp(control_name, dest->kcontrol_news[i].name)) {
380 list_add(&path->list, &dapm->card->paths);
381 list_add(&path->list_sink, &dest->sources);
382 list_add(&path->list_source, &src->sinks);
383 path->name = dest->kcontrol_news[i].name;
384 dapm_set_path_status(dest, path, i);
391 static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm,
392 struct snd_soc_dapm_widget *kcontrolw,
393 const struct snd_kcontrol_new *kcontrol_new,
394 struct snd_kcontrol **kcontrol)
396 struct snd_soc_dapm_widget *w;
401 list_for_each_entry(w, &dapm->card->widgets, list) {
402 if (w == kcontrolw || w->dapm != kcontrolw->dapm)
404 for (i = 0; i < w->num_kcontrols; i++) {
405 if (&w->kcontrol_news[i] == kcontrol_new) {
407 *kcontrol = w->kcontrols[i];
416 /* create new dapm mixer control */
417 static int dapm_new_mixer(struct snd_soc_dapm_widget *w)
419 struct snd_soc_dapm_context *dapm = w->dapm;
421 size_t name_len, prefix_len;
422 struct snd_soc_dapm_path *path;
423 struct snd_card *card = dapm->card->snd_card;
425 struct snd_soc_dapm_widget_list *wlist;
429 prefix = dapm->codec->name_prefix;
434 prefix_len = strlen(prefix) + 1;
439 for (i = 0; i < w->num_kcontrols; i++) {
442 list_for_each_entry(path, &w->sources, list_sink) {
444 /* mixer/mux paths name must match control name */
445 if (path->name != (char *)w->kcontrol_news[i].name)
448 if (w->kcontrols[i]) {
449 path->kcontrol = w->kcontrols[i];
453 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
454 sizeof(struct snd_soc_dapm_widget *),
455 wlist = kzalloc(wlistsize, GFP_KERNEL);
458 "asoc: can't allocate widget list for %s\n",
462 wlist->num_widgets = 1;
463 wlist->widgets[0] = w;
465 /* add dapm control with long name.
466 * for dapm_mixer this is the concatenation of the
467 * mixer and kcontrol name.
468 * for dapm_mixer_named_ctl this is simply the
471 name_len = strlen(w->kcontrol_news[i].name) + 1;
472 if (w->id != snd_soc_dapm_mixer_named_ctl)
473 name_len += 1 + strlen(w->name);
475 path->long_name = kmalloc(name_len, GFP_KERNEL);
477 if (path->long_name == NULL) {
484 /* The control will get a prefix from
485 * the control creation process but
486 * we're also using the same prefix
487 * for widgets so cut the prefix off
488 * the front of the widget name.
490 snprintf(path->long_name, name_len, "%s %s",
491 w->name + prefix_len,
492 w->kcontrol_news[i].name);
494 case snd_soc_dapm_mixer_named_ctl:
495 snprintf(path->long_name, name_len, "%s",
496 w->kcontrol_news[i].name);
500 path->long_name[name_len - 1] = '\0';
502 path->kcontrol = snd_soc_cnew(&w->kcontrol_news[i],
503 wlist, path->long_name,
505 ret = snd_ctl_add(card, path->kcontrol);
508 "asoc: failed to add dapm kcontrol %s: %d\n",
509 path->long_name, ret);
511 kfree(path->long_name);
512 path->long_name = NULL;
515 w->kcontrols[i] = path->kcontrol;
521 /* create new dapm mux control */
522 static int dapm_new_mux(struct snd_soc_dapm_widget *w)
524 struct snd_soc_dapm_context *dapm = w->dapm;
525 struct snd_soc_dapm_path *path = NULL;
526 struct snd_kcontrol *kcontrol;
527 struct snd_card *card = dapm->card->snd_card;
531 struct snd_soc_dapm_widget_list *wlist;
532 int shared, wlistentries;
536 if (w->num_kcontrols != 1) {
538 "asoc: mux %s has incorrect number of controls\n",
543 shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[0],
546 wlist = kcontrol->private_data;
547 wlistentries = wlist->num_widgets + 1;
552 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
553 wlistentries * sizeof(struct snd_soc_dapm_widget *),
554 wlist = krealloc(wlist, wlistsize, GFP_KERNEL);
557 "asoc: can't allocate widget list for %s\n", w->name);
560 wlist->num_widgets = wlistentries;
561 wlist->widgets[wlistentries - 1] = w;
565 prefix = dapm->codec->name_prefix;
570 name = w->kcontrol_news[0].name;
575 prefix_len = strlen(prefix) + 1;
581 * The control will get a prefix from the control creation
582 * process but we're also using the same prefix for widgets so
583 * cut the prefix off the front of the widget name.
585 kcontrol = snd_soc_cnew(&w->kcontrol_news[0], wlist,
586 name + prefix_len, prefix);
587 ret = snd_ctl_add(card, kcontrol);
589 dev_err(dapm->dev, "failed to add kcontrol %s: %d\n",
596 kcontrol->private_data = wlist;
598 w->kcontrols[0] = kcontrol;
600 list_for_each_entry(path, &w->sources, list_sink)
601 path->kcontrol = kcontrol;
606 /* create new dapm volume control */
607 static int dapm_new_pga(struct snd_soc_dapm_widget *w)
609 if (w->num_kcontrols)
610 dev_err(w->dapm->dev,
611 "asoc: PGA controls not supported: '%s'\n", w->name);
616 /* reset 'walked' bit for each dapm path */
617 static inline void dapm_clear_walk(struct snd_soc_dapm_context *dapm)
619 struct snd_soc_dapm_path *p;
621 list_for_each_entry(p, &dapm->card->paths, list)
625 /* We implement power down on suspend by checking the power state of
626 * the ALSA card - when we are suspending the ALSA state for the card
629 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
631 int level = snd_power_get_state(widget->dapm->card->snd_card);
634 case SNDRV_CTL_POWER_D3hot:
635 case SNDRV_CTL_POWER_D3cold:
636 if (widget->ignore_suspend)
637 dev_dbg(widget->dapm->dev, "%s ignoring suspend\n",
639 return widget->ignore_suspend;
646 * Recursively check for a completed path to an active or physically connected
647 * output widget. Returns number of complete paths.
649 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
651 struct snd_soc_dapm_path *path;
654 DAPM_UPDATE_STAT(widget, path_checks);
656 if (widget->id == snd_soc_dapm_supply)
659 switch (widget->id) {
660 case snd_soc_dapm_adc:
661 case snd_soc_dapm_aif_out:
663 return snd_soc_dapm_suspend_check(widget);
668 if (widget->connected) {
669 /* connected pin ? */
670 if (widget->id == snd_soc_dapm_output && !widget->ext)
671 return snd_soc_dapm_suspend_check(widget);
673 /* connected jack or spk ? */
674 if (widget->id == snd_soc_dapm_hp || widget->id == snd_soc_dapm_spk ||
675 (widget->id == snd_soc_dapm_line && !list_empty(&widget->sources)))
676 return snd_soc_dapm_suspend_check(widget);
679 list_for_each_entry(path, &widget->sinks, list_source) {
680 DAPM_UPDATE_STAT(widget, neighbour_checks);
688 if (path->sink && path->connect) {
690 con += is_connected_output_ep(path->sink);
698 * Recursively check for a completed path to an active or physically connected
699 * input widget. Returns number of complete paths.
701 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
703 struct snd_soc_dapm_path *path;
706 DAPM_UPDATE_STAT(widget, path_checks);
708 if (widget->id == snd_soc_dapm_supply)
711 /* active stream ? */
712 switch (widget->id) {
713 case snd_soc_dapm_dac:
714 case snd_soc_dapm_aif_in:
716 return snd_soc_dapm_suspend_check(widget);
721 if (widget->connected) {
722 /* connected pin ? */
723 if (widget->id == snd_soc_dapm_input && !widget->ext)
724 return snd_soc_dapm_suspend_check(widget);
726 /* connected VMID/Bias for lower pops */
727 if (widget->id == snd_soc_dapm_vmid)
728 return snd_soc_dapm_suspend_check(widget);
730 /* connected jack ? */
731 if (widget->id == snd_soc_dapm_mic ||
732 (widget->id == snd_soc_dapm_line && !list_empty(&widget->sinks)))
733 return snd_soc_dapm_suspend_check(widget);
736 list_for_each_entry(path, &widget->sources, list_sink) {
737 DAPM_UPDATE_STAT(widget, neighbour_checks);
745 if (path->source && path->connect) {
747 con += is_connected_input_ep(path->source);
755 * Handler for generic register modifier widget.
757 int dapm_reg_event(struct snd_soc_dapm_widget *w,
758 struct snd_kcontrol *kcontrol, int event)
762 if (SND_SOC_DAPM_EVENT_ON(event))
767 soc_widget_update_bits(w, -(w->reg + 1),
768 w->mask << w->shift, val << w->shift);
772 EXPORT_SYMBOL_GPL(dapm_reg_event);
774 static int dapm_widget_power_check(struct snd_soc_dapm_widget *w)
779 return w->power_check(w);
782 /* Generic check to see if a widget should be powered.
784 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
788 DAPM_UPDATE_STAT(w, power_checks);
790 in = is_connected_input_ep(w);
791 dapm_clear_walk(w->dapm);
792 out = is_connected_output_ep(w);
793 dapm_clear_walk(w->dapm);
794 return out != 0 && in != 0;
797 /* Check to see if an ADC has power */
798 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
802 DAPM_UPDATE_STAT(w, power_checks);
805 in = is_connected_input_ep(w);
806 dapm_clear_walk(w->dapm);
809 return dapm_generic_check_power(w);
813 /* Check to see if a DAC has power */
814 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
818 DAPM_UPDATE_STAT(w, power_checks);
821 out = is_connected_output_ep(w);
822 dapm_clear_walk(w->dapm);
825 return dapm_generic_check_power(w);
829 /* Check to see if a power supply is needed */
830 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
832 struct snd_soc_dapm_path *path;
835 DAPM_UPDATE_STAT(w, power_checks);
837 /* Check if one of our outputs is connected */
838 list_for_each_entry(path, &w->sinks, list_source) {
839 DAPM_UPDATE_STAT(w, neighbour_checks);
844 if (path->connected &&
845 !path->connected(path->source, path->sink))
851 if (dapm_widget_power_check(path->sink)) {
857 dapm_clear_walk(w->dapm);
862 static int dapm_always_on_check_power(struct snd_soc_dapm_widget *w)
867 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
868 struct snd_soc_dapm_widget *b,
876 sort = dapm_down_seq;
878 if (sort[a->id] != sort[b->id])
879 return sort[a->id] - sort[b->id];
880 if (a->subseq != b->subseq) {
882 return a->subseq - b->subseq;
884 return b->subseq - a->subseq;
886 if (a->reg != b->reg)
887 return a->reg - b->reg;
888 if (a->dapm != b->dapm)
889 return (unsigned long)a->dapm - (unsigned long)b->dapm;
894 /* Insert a widget in order into a DAPM power sequence. */
895 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
896 struct list_head *list,
899 struct snd_soc_dapm_widget *w;
901 list_for_each_entry(w, list, power_list)
902 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
903 list_add_tail(&new_widget->power_list, &w->power_list);
907 list_add_tail(&new_widget->power_list, list);
910 static void dapm_seq_check_event(struct snd_soc_dapm_context *dapm,
911 struct snd_soc_dapm_widget *w, int event)
913 struct snd_soc_card *card = dapm->card;
918 case SND_SOC_DAPM_PRE_PMU:
922 case SND_SOC_DAPM_POST_PMU:
923 ev_name = "POST_PMU";
926 case SND_SOC_DAPM_PRE_PMD:
930 case SND_SOC_DAPM_POST_PMD:
931 ev_name = "POST_PMD";
939 if (w->power != power)
942 if (w->event && (w->event_flags & event)) {
943 pop_dbg(dapm->dev, card->pop_time, "pop test : %s %s\n",
945 trace_snd_soc_dapm_widget_event_start(w, event);
946 ret = w->event(w, NULL, event);
947 trace_snd_soc_dapm_widget_event_done(w, event);
949 pr_err("%s: %s event failed: %d\n",
950 ev_name, w->name, ret);
954 /* Apply the coalesced changes from a DAPM sequence */
955 static void dapm_seq_run_coalesced(struct snd_soc_dapm_context *dapm,
956 struct list_head *pending)
958 struct snd_soc_card *card = dapm->card;
959 struct snd_soc_dapm_widget *w;
961 unsigned int value = 0;
962 unsigned int mask = 0;
963 unsigned int cur_mask;
965 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
968 list_for_each_entry(w, pending, power_list) {
969 cur_mask = 1 << w->shift;
970 BUG_ON(reg != w->reg);
981 pop_dbg(dapm->dev, card->pop_time,
982 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
983 w->name, reg, value, mask);
985 /* Check for events */
986 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMU);
987 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMD);
991 /* Any widget will do, they should all be updating the
994 w = list_first_entry(pending, struct snd_soc_dapm_widget,
997 pop_dbg(dapm->dev, card->pop_time,
998 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
999 value, mask, reg, card->pop_time);
1000 pop_wait(card->pop_time);
1001 soc_widget_update_bits(w, reg, mask, value);
1004 list_for_each_entry(w, pending, power_list) {
1005 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMU);
1006 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMD);
1010 /* Apply a DAPM power sequence.
1012 * We walk over a pre-sorted list of widgets to apply power to. In
1013 * order to minimise the number of writes to the device required
1014 * multiple widgets will be updated in a single write where possible.
1015 * Currently anything that requires more than a single write is not
1018 static void dapm_seq_run(struct snd_soc_dapm_context *dapm,
1019 struct list_head *list, int event, bool power_up)
1021 struct snd_soc_dapm_widget *w, *n;
1024 int cur_subseq = -1;
1025 int cur_reg = SND_SOC_NOPM;
1026 struct snd_soc_dapm_context *cur_dapm = NULL;
1033 sort = dapm_down_seq;
1035 list_for_each_entry_safe(w, n, list, power_list) {
1038 /* Do we need to apply any queued changes? */
1039 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
1040 w->dapm != cur_dapm || w->subseq != cur_subseq) {
1041 if (!list_empty(&pending))
1042 dapm_seq_run_coalesced(cur_dapm, &pending);
1044 if (cur_dapm && cur_dapm->seq_notifier) {
1045 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1046 if (sort[i] == cur_sort)
1047 cur_dapm->seq_notifier(cur_dapm,
1052 INIT_LIST_HEAD(&pending);
1054 cur_subseq = INT_MIN;
1055 cur_reg = SND_SOC_NOPM;
1060 case snd_soc_dapm_pre:
1062 list_for_each_entry_safe_continue(w, n, list,
1065 if (event == SND_SOC_DAPM_STREAM_START)
1067 NULL, SND_SOC_DAPM_PRE_PMU);
1068 else if (event == SND_SOC_DAPM_STREAM_STOP)
1070 NULL, SND_SOC_DAPM_PRE_PMD);
1073 case snd_soc_dapm_post:
1075 list_for_each_entry_safe_continue(w, n, list,
1078 if (event == SND_SOC_DAPM_STREAM_START)
1080 NULL, SND_SOC_DAPM_POST_PMU);
1081 else if (event == SND_SOC_DAPM_STREAM_STOP)
1083 NULL, SND_SOC_DAPM_POST_PMD);
1087 /* Queue it up for application */
1088 cur_sort = sort[w->id];
1089 cur_subseq = w->subseq;
1092 list_move(&w->power_list, &pending);
1097 dev_err(w->dapm->dev,
1098 "Failed to apply widget power: %d\n", ret);
1101 if (!list_empty(&pending))
1102 dapm_seq_run_coalesced(cur_dapm, &pending);
1104 if (cur_dapm && cur_dapm->seq_notifier) {
1105 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1106 if (sort[i] == cur_sort)
1107 cur_dapm->seq_notifier(cur_dapm,
1112 static void dapm_widget_update(struct snd_soc_dapm_context *dapm)
1114 struct snd_soc_dapm_update *update = dapm->update;
1115 struct snd_soc_dapm_widget *w;
1124 (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
1125 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
1127 pr_err("%s DAPM pre-event failed: %d\n",
1131 ret = snd_soc_update_bits(w->codec, update->reg, update->mask,
1134 pr_err("%s DAPM update failed: %d\n", w->name, ret);
1137 (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1138 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1140 pr_err("%s DAPM post-event failed: %d\n",
1145 /* Async callback run prior to DAPM sequences - brings to _PREPARE if
1146 * they're changing state.
1148 static void dapm_pre_sequence_async(void *data, async_cookie_t cookie)
1150 struct snd_soc_dapm_context *d = data;
1153 /* If we're off and we're not supposed to be go into STANDBY */
1154 if (d->bias_level == SND_SOC_BIAS_OFF &&
1155 d->target_bias_level != SND_SOC_BIAS_OFF) {
1156 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1159 "Failed to turn on bias: %d\n", ret);
1162 /* Prepare for a STADDBY->ON or ON->STANDBY transition */
1163 if (d->bias_level != d->target_bias_level) {
1164 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);
1167 "Failed to prepare bias: %d\n", ret);
1171 /* Async callback run prior to DAPM sequences - brings to their final
1174 static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
1176 struct snd_soc_dapm_context *d = data;
1179 /* If we just powered the last thing off drop to standby bias */
1180 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1181 (d->target_bias_level == SND_SOC_BIAS_STANDBY ||
1182 d->target_bias_level == SND_SOC_BIAS_OFF)) {
1183 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1185 dev_err(d->dev, "Failed to apply standby bias: %d\n",
1189 /* If we're in standby and can support bias off then do that */
1190 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1191 d->target_bias_level == SND_SOC_BIAS_OFF) {
1192 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);
1194 dev_err(d->dev, "Failed to turn off bias: %d\n", ret);
1197 /* If we just powered up then move to active bias */
1198 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1199 d->target_bias_level == SND_SOC_BIAS_ON) {
1200 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);
1202 dev_err(d->dev, "Failed to apply active bias: %d\n",
1207 static void dapm_widget_set_power(struct snd_soc_dapm_widget *w, bool power,
1208 struct list_head *up_list,
1209 struct list_head *down_list)
1211 if (w->power == power)
1214 trace_snd_soc_dapm_widget_power(w, power);
1217 dapm_seq_insert(w, up_list, true);
1219 dapm_seq_insert(w, down_list, false);
1224 static void dapm_power_one_widget(struct snd_soc_dapm_widget *w,
1225 struct list_head *up_list,
1226 struct list_head *down_list)
1231 case snd_soc_dapm_pre:
1232 dapm_seq_insert(w, down_list, false);
1234 case snd_soc_dapm_post:
1235 dapm_seq_insert(w, up_list, true);
1239 power = dapm_widget_power_check(w);
1241 dapm_widget_set_power(w, power, up_list, down_list);
1247 * Scan each dapm widget for complete audio path.
1248 * A complete path is a route that has valid endpoints i.e.:-
1250 * o DAC to output pin.
1251 * o Input Pin to ADC.
1252 * o Input pin to Output pin (bypass, sidetone)
1253 * o DAC to ADC (loopback).
1255 static int dapm_power_widgets(struct snd_soc_dapm_context *dapm, int event)
1257 struct snd_soc_card *card = dapm->card;
1258 struct snd_soc_dapm_widget *w;
1259 struct snd_soc_dapm_context *d;
1261 LIST_HEAD(down_list);
1262 LIST_HEAD(async_domain);
1263 enum snd_soc_bias_level bias;
1265 trace_snd_soc_dapm_start(card);
1267 list_for_each_entry(d, &card->dapm_list, list) {
1268 if (d->n_widgets || d->codec == NULL) {
1269 if (d->idle_bias_off)
1270 d->target_bias_level = SND_SOC_BIAS_OFF;
1272 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1276 memset(&card->dapm_stats, 0, sizeof(card->dapm_stats));
1278 /* Check which widgets we need to power and store them in
1279 * lists indicating if they should be powered up or down.
1281 list_for_each_entry(w, &card->widgets, list) {
1282 dapm_power_one_widget(w, &up_list, &down_list);
1285 list_for_each_entry(w, &card->widgets, list) {
1289 /* Supplies and micbiases only bring the
1290 * context up to STANDBY as unless something
1291 * else is active and passing audio they
1292 * generally don't require full power.
1295 case snd_soc_dapm_supply:
1296 case snd_soc_dapm_micbias:
1297 if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
1298 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1301 d->target_bias_level = SND_SOC_BIAS_ON;
1308 /* If there are no DAPM widgets then try to figure out power from the
1311 if (!dapm->n_widgets) {
1313 case SND_SOC_DAPM_STREAM_START:
1314 case SND_SOC_DAPM_STREAM_RESUME:
1315 dapm->target_bias_level = SND_SOC_BIAS_ON;
1317 case SND_SOC_DAPM_STREAM_STOP:
1318 if (dapm->codec->active)
1319 dapm->target_bias_level = SND_SOC_BIAS_ON;
1321 dapm->target_bias_level = SND_SOC_BIAS_STANDBY;
1323 case SND_SOC_DAPM_STREAM_SUSPEND:
1324 dapm->target_bias_level = SND_SOC_BIAS_STANDBY;
1326 case SND_SOC_DAPM_STREAM_NOP:
1327 dapm->target_bias_level = dapm->bias_level;
1334 /* Force all contexts in the card to the same bias state if
1335 * they're not ground referenced.
1337 bias = SND_SOC_BIAS_OFF;
1338 list_for_each_entry(d, &card->dapm_list, list)
1339 if (d->target_bias_level > bias)
1340 bias = d->target_bias_level;
1341 list_for_each_entry(d, &card->dapm_list, list)
1342 if (!d->idle_bias_off)
1343 d->target_bias_level = bias;
1345 trace_snd_soc_dapm_walk_done(card);
1347 /* Run all the bias changes in parallel */
1348 list_for_each_entry(d, &dapm->card->dapm_list, list)
1349 async_schedule_domain(dapm_pre_sequence_async, d,
1351 async_synchronize_full_domain(&async_domain);
1353 /* Power down widgets first; try to avoid amplifying pops. */
1354 dapm_seq_run(dapm, &down_list, event, false);
1356 dapm_widget_update(dapm);
1359 dapm_seq_run(dapm, &up_list, event, true);
1361 /* Run all the bias changes in parallel */
1362 list_for_each_entry(d, &dapm->card->dapm_list, list)
1363 async_schedule_domain(dapm_post_sequence_async, d,
1365 async_synchronize_full_domain(&async_domain);
1367 pop_dbg(dapm->dev, card->pop_time,
1368 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
1369 pop_wait(card->pop_time);
1371 trace_snd_soc_dapm_done(card);
1376 #ifdef CONFIG_DEBUG_FS
1377 static int dapm_widget_power_open_file(struct inode *inode, struct file *file)
1379 file->private_data = inode->i_private;
1383 static ssize_t dapm_widget_power_read_file(struct file *file,
1384 char __user *user_buf,
1385 size_t count, loff_t *ppos)
1387 struct snd_soc_dapm_widget *w = file->private_data;
1391 struct snd_soc_dapm_path *p = NULL;
1393 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1397 in = is_connected_input_ep(w);
1398 dapm_clear_walk(w->dapm);
1399 out = is_connected_output_ep(w);
1400 dapm_clear_walk(w->dapm);
1402 ret = snprintf(buf, PAGE_SIZE, "%s: %s in %d out %d",
1403 w->name, w->power ? "On" : "Off", in, out);
1406 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1407 " - R%d(0x%x) bit %d",
1408 w->reg, w->reg, w->shift);
1410 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1413 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1415 w->active ? "active" : "inactive");
1417 list_for_each_entry(p, &w->sources, list_sink) {
1418 if (p->connected && !p->connected(w, p->sink))
1422 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1423 " in \"%s\" \"%s\"\n",
1424 p->name ? p->name : "static",
1427 list_for_each_entry(p, &w->sinks, list_source) {
1428 if (p->connected && !p->connected(w, p->sink))
1432 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1433 " out \"%s\" \"%s\"\n",
1434 p->name ? p->name : "static",
1438 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1444 static const struct file_operations dapm_widget_power_fops = {
1445 .open = dapm_widget_power_open_file,
1446 .read = dapm_widget_power_read_file,
1447 .llseek = default_llseek,
1450 static int dapm_bias_open_file(struct inode *inode, struct file *file)
1452 file->private_data = inode->i_private;
1456 static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
1457 size_t count, loff_t *ppos)
1459 struct snd_soc_dapm_context *dapm = file->private_data;
1462 switch (dapm->bias_level) {
1463 case SND_SOC_BIAS_ON:
1466 case SND_SOC_BIAS_PREPARE:
1467 level = "Prepare\n";
1469 case SND_SOC_BIAS_STANDBY:
1470 level = "Standby\n";
1472 case SND_SOC_BIAS_OFF:
1477 level = "Unknown\n";
1481 return simple_read_from_buffer(user_buf, count, ppos, level,
1485 static const struct file_operations dapm_bias_fops = {
1486 .open = dapm_bias_open_file,
1487 .read = dapm_bias_read_file,
1488 .llseek = default_llseek,
1491 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1492 struct dentry *parent)
1496 dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
1498 if (!dapm->debugfs_dapm) {
1500 "Failed to create DAPM debugfs directory\n");
1504 d = debugfs_create_file("bias_level", 0444,
1505 dapm->debugfs_dapm, dapm,
1509 "ASoC: Failed to create bias level debugfs file\n");
1512 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1514 struct snd_soc_dapm_context *dapm = w->dapm;
1517 if (!dapm->debugfs_dapm || !w->name)
1520 d = debugfs_create_file(w->name, 0444,
1521 dapm->debugfs_dapm, w,
1522 &dapm_widget_power_fops);
1524 dev_warn(w->dapm->dev,
1525 "ASoC: Failed to create %s debugfs file\n",
1529 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1531 debugfs_remove_recursive(dapm->debugfs_dapm);
1535 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1536 struct dentry *parent)
1540 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1544 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1550 /* test and update the power status of a mux widget */
1551 static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1552 struct snd_kcontrol *kcontrol, int change,
1553 int mux, struct soc_enum *e)
1555 struct snd_soc_dapm_path *path;
1558 if (widget->id != snd_soc_dapm_mux &&
1559 widget->id != snd_soc_dapm_virt_mux &&
1560 widget->id != snd_soc_dapm_value_mux)
1566 /* find dapm widget path assoc with kcontrol */
1567 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1568 if (path->kcontrol != kcontrol)
1571 if (!path->name || !e->texts[mux])
1575 /* we now need to match the string in the enum to the path */
1576 if (!(strcmp(path->name, e->texts[mux])))
1577 path->connect = 1; /* new connection */
1579 path->connect = 0; /* old connection must be powered down */
1583 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1588 /* test and update the power status of a mixer or switch widget */
1589 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1590 struct snd_kcontrol *kcontrol, int connect)
1592 struct snd_soc_dapm_path *path;
1595 if (widget->id != snd_soc_dapm_mixer &&
1596 widget->id != snd_soc_dapm_mixer_named_ctl &&
1597 widget->id != snd_soc_dapm_switch)
1600 /* find dapm widget path assoc with kcontrol */
1601 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1602 if (path->kcontrol != kcontrol)
1605 /* found, now check type */
1607 path->connect = connect;
1611 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1616 /* show dapm widget status in sys fs */
1617 static ssize_t dapm_widget_show(struct device *dev,
1618 struct device_attribute *attr, char *buf)
1620 struct snd_soc_pcm_runtime *rtd =
1621 container_of(dev, struct snd_soc_pcm_runtime, dev);
1622 struct snd_soc_codec *codec =rtd->codec;
1623 struct snd_soc_dapm_widget *w;
1625 char *state = "not set";
1627 list_for_each_entry(w, &codec->card->widgets, list) {
1628 if (w->dapm != &codec->dapm)
1631 /* only display widgets that burnm power */
1633 case snd_soc_dapm_hp:
1634 case snd_soc_dapm_mic:
1635 case snd_soc_dapm_spk:
1636 case snd_soc_dapm_line:
1637 case snd_soc_dapm_micbias:
1638 case snd_soc_dapm_dac:
1639 case snd_soc_dapm_adc:
1640 case snd_soc_dapm_pga:
1641 case snd_soc_dapm_out_drv:
1642 case snd_soc_dapm_mixer:
1643 case snd_soc_dapm_mixer_named_ctl:
1644 case snd_soc_dapm_supply:
1646 count += sprintf(buf + count, "%s: %s\n",
1647 w->name, w->power ? "On":"Off");
1654 switch (codec->dapm.bias_level) {
1655 case SND_SOC_BIAS_ON:
1658 case SND_SOC_BIAS_PREPARE:
1661 case SND_SOC_BIAS_STANDBY:
1664 case SND_SOC_BIAS_OFF:
1668 count += sprintf(buf + count, "PM State: %s\n", state);
1673 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
1675 int snd_soc_dapm_sys_add(struct device *dev)
1677 return device_create_file(dev, &dev_attr_dapm_widget);
1680 static void snd_soc_dapm_sys_remove(struct device *dev)
1682 device_remove_file(dev, &dev_attr_dapm_widget);
1685 /* free all dapm widgets and resources */
1686 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
1688 struct snd_soc_dapm_widget *w, *next_w;
1689 struct snd_soc_dapm_path *p, *next_p;
1691 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
1692 if (w->dapm != dapm)
1696 * remove source and sink paths associated to this widget.
1697 * While removing the path, remove reference to it from both
1698 * source and sink widgets so that path is removed only once.
1700 list_for_each_entry_safe(p, next_p, &w->sources, list_sink) {
1701 list_del(&p->list_sink);
1702 list_del(&p->list_source);
1704 kfree(p->long_name);
1707 list_for_each_entry_safe(p, next_p, &w->sinks, list_source) {
1708 list_del(&p->list_sink);
1709 list_del(&p->list_source);
1711 kfree(p->long_name);
1714 kfree(w->kcontrols);
1720 static struct snd_soc_dapm_widget *dapm_find_widget(
1721 struct snd_soc_dapm_context *dapm, const char *pin,
1722 bool search_other_contexts)
1724 struct snd_soc_dapm_widget *w;
1725 struct snd_soc_dapm_widget *fallback = NULL;
1727 list_for_each_entry(w, &dapm->card->widgets, list) {
1728 if (!strcmp(w->name, pin)) {
1729 if (w->dapm == dapm)
1736 if (search_other_contexts)
1742 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
1743 const char *pin, int status)
1745 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
1748 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
1752 w->connected = status;
1760 * snd_soc_dapm_sync - scan and power dapm paths
1761 * @dapm: DAPM context
1763 * Walks all dapm audio paths and powers widgets according to their
1764 * stream or path usage.
1766 * Returns 0 for success.
1768 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
1770 return dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
1772 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
1774 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
1775 const struct snd_soc_dapm_route *route)
1777 struct snd_soc_dapm_path *path;
1778 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
1779 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
1781 const char *control = route->control;
1783 char prefixed_sink[80];
1784 char prefixed_source[80];
1787 if (dapm->codec && dapm->codec->name_prefix) {
1788 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
1789 dapm->codec->name_prefix, route->sink);
1790 sink = prefixed_sink;
1791 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
1792 dapm->codec->name_prefix, route->source);
1793 source = prefixed_source;
1796 source = route->source;
1800 * find src and dest widgets over all widgets but favor a widget from
1801 * current DAPM context
1803 list_for_each_entry(w, &dapm->card->widgets, list) {
1804 if (!wsink && !(strcmp(w->name, sink))) {
1806 if (w->dapm == dapm)
1810 if (!wsource && !(strcmp(w->name, source))) {
1812 if (w->dapm == dapm)
1816 /* use widget from another DAPM context if not found from this */
1822 if (wsource == NULL || wsink == NULL)
1825 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
1829 path->source = wsource;
1831 path->connected = route->connected;
1832 INIT_LIST_HEAD(&path->list);
1833 INIT_LIST_HEAD(&path->list_source);
1834 INIT_LIST_HEAD(&path->list_sink);
1836 /* check for external widgets */
1837 if (wsink->id == snd_soc_dapm_input) {
1838 if (wsource->id == snd_soc_dapm_micbias ||
1839 wsource->id == snd_soc_dapm_mic ||
1840 wsource->id == snd_soc_dapm_line ||
1841 wsource->id == snd_soc_dapm_output)
1844 if (wsource->id == snd_soc_dapm_output) {
1845 if (wsink->id == snd_soc_dapm_spk ||
1846 wsink->id == snd_soc_dapm_hp ||
1847 wsink->id == snd_soc_dapm_line ||
1848 wsink->id == snd_soc_dapm_input)
1852 /* connect static paths */
1853 if (control == NULL) {
1854 list_add(&path->list, &dapm->card->paths);
1855 list_add(&path->list_sink, &wsink->sources);
1856 list_add(&path->list_source, &wsource->sinks);
1861 /* connect dynamic paths */
1862 switch (wsink->id) {
1863 case snd_soc_dapm_adc:
1864 case snd_soc_dapm_dac:
1865 case snd_soc_dapm_pga:
1866 case snd_soc_dapm_out_drv:
1867 case snd_soc_dapm_input:
1868 case snd_soc_dapm_output:
1869 case snd_soc_dapm_micbias:
1870 case snd_soc_dapm_vmid:
1871 case snd_soc_dapm_pre:
1872 case snd_soc_dapm_post:
1873 case snd_soc_dapm_supply:
1874 case snd_soc_dapm_aif_in:
1875 case snd_soc_dapm_aif_out:
1876 list_add(&path->list, &dapm->card->paths);
1877 list_add(&path->list_sink, &wsink->sources);
1878 list_add(&path->list_source, &wsource->sinks);
1881 case snd_soc_dapm_mux:
1882 case snd_soc_dapm_virt_mux:
1883 case snd_soc_dapm_value_mux:
1884 ret = dapm_connect_mux(dapm, wsource, wsink, path, control,
1885 &wsink->kcontrol_news[0]);
1889 case snd_soc_dapm_switch:
1890 case snd_soc_dapm_mixer:
1891 case snd_soc_dapm_mixer_named_ctl:
1892 ret = dapm_connect_mixer(dapm, wsource, wsink, path, control);
1896 case snd_soc_dapm_hp:
1897 case snd_soc_dapm_mic:
1898 case snd_soc_dapm_line:
1899 case snd_soc_dapm_spk:
1900 list_add(&path->list, &dapm->card->paths);
1901 list_add(&path->list_sink, &wsink->sources);
1902 list_add(&path->list_source, &wsource->sinks);
1909 dev_warn(dapm->dev, "asoc: no dapm match for %s --> %s --> %s\n",
1910 source, control, sink);
1916 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1917 * @dapm: DAPM context
1918 * @route: audio routes
1919 * @num: number of routes
1921 * Connects 2 dapm widgets together via a named audio path. The sink is
1922 * the widget receiving the audio signal, whilst the source is the sender
1923 * of the audio signal.
1925 * Returns 0 for success else error. On error all resources can be freed
1926 * with a call to snd_soc_card_free().
1928 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
1929 const struct snd_soc_dapm_route *route, int num)
1933 for (i = 0; i < num; i++) {
1934 ret = snd_soc_dapm_add_route(dapm, route);
1936 dev_err(dapm->dev, "Failed to add route %s->%s\n",
1937 route->source, route->sink);
1945 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
1947 static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm,
1948 const struct snd_soc_dapm_route *route)
1950 struct snd_soc_dapm_widget *source = dapm_find_widget(dapm,
1953 struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm,
1956 struct snd_soc_dapm_path *path;
1960 dev_err(dapm->dev, "Unable to find source %s for weak route\n",
1966 dev_err(dapm->dev, "Unable to find sink %s for weak route\n",
1971 if (route->control || route->connected)
1972 dev_warn(dapm->dev, "Ignoring control for weak route %s->%s\n",
1973 route->source, route->sink);
1975 list_for_each_entry(path, &source->sinks, list_source) {
1976 if (path->sink == sink) {
1983 dev_err(dapm->dev, "No path found for weak route %s->%s\n",
1984 route->source, route->sink);
1986 dev_warn(dapm->dev, "%d paths found for weak route %s->%s\n",
1987 count, route->source, route->sink);
1993 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
1994 * @dapm: DAPM context
1995 * @route: audio routes
1996 * @num: number of routes
1998 * Mark existing routes matching those specified in the passed array
1999 * as being weak, meaning that they are ignored for the purpose of
2000 * power decisions. The main intended use case is for sidetone paths
2001 * which couple audio between other independent paths if they are both
2002 * active in order to make the combination work better at the user
2003 * level but which aren't intended to be "used".
2005 * Note that CODEC drivers should not use this as sidetone type paths
2006 * can frequently also be used as bypass paths.
2008 int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm,
2009 const struct snd_soc_dapm_route *route, int num)
2014 for (i = 0; i < num; i++) {
2015 err = snd_soc_dapm_weak_route(dapm, route);
2023 EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes);
2026 * snd_soc_dapm_new_widgets - add new dapm widgets
2027 * @dapm: DAPM context
2029 * Checks the codec for any new dapm widgets and creates them if found.
2031 * Returns 0 for success.
2033 int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context *dapm)
2035 struct snd_soc_dapm_widget *w;
2038 list_for_each_entry(w, &dapm->card->widgets, list)
2043 if (w->num_kcontrols) {
2044 w->kcontrols = kzalloc(w->num_kcontrols *
2045 sizeof(struct snd_kcontrol *),
2052 case snd_soc_dapm_switch:
2053 case snd_soc_dapm_mixer:
2054 case snd_soc_dapm_mixer_named_ctl:
2055 w->power_check = dapm_generic_check_power;
2058 case snd_soc_dapm_mux:
2059 case snd_soc_dapm_virt_mux:
2060 case snd_soc_dapm_value_mux:
2061 w->power_check = dapm_generic_check_power;
2064 case snd_soc_dapm_adc:
2065 case snd_soc_dapm_aif_out:
2066 w->power_check = dapm_adc_check_power;
2068 case snd_soc_dapm_dac:
2069 case snd_soc_dapm_aif_in:
2070 w->power_check = dapm_dac_check_power;
2072 case snd_soc_dapm_pga:
2073 case snd_soc_dapm_out_drv:
2074 w->power_check = dapm_generic_check_power;
2077 case snd_soc_dapm_input:
2078 case snd_soc_dapm_output:
2079 case snd_soc_dapm_micbias:
2080 case snd_soc_dapm_spk:
2081 case snd_soc_dapm_hp:
2082 case snd_soc_dapm_mic:
2083 case snd_soc_dapm_line:
2084 w->power_check = dapm_generic_check_power;
2086 case snd_soc_dapm_supply:
2087 w->power_check = dapm_supply_check_power;
2088 case snd_soc_dapm_vmid:
2089 case snd_soc_dapm_pre:
2090 case snd_soc_dapm_post:
2094 if (!w->power_check)
2095 w->power_check = dapm_always_on_check_power;
2097 /* Read the initial power state from the device */
2099 val = soc_widget_read(w, w->reg);
2100 val &= 1 << w->shift;
2110 dapm_debugfs_add_widget(w);
2113 dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
2116 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
2119 * snd_soc_dapm_get_volsw - dapm mixer get callback
2120 * @kcontrol: mixer control
2121 * @ucontrol: control element information
2123 * Callback to get the value of a dapm mixer control.
2125 * Returns 0 for success.
2127 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
2128 struct snd_ctl_elem_value *ucontrol)
2130 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2131 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2132 struct soc_mixer_control *mc =
2133 (struct soc_mixer_control *)kcontrol->private_value;
2134 unsigned int reg = mc->reg;
2135 unsigned int shift = mc->shift;
2136 unsigned int rshift = mc->rshift;
2138 unsigned int invert = mc->invert;
2139 unsigned int mask = (1 << fls(max)) - 1;
2141 ucontrol->value.integer.value[0] =
2142 (snd_soc_read(widget->codec, reg) >> shift) & mask;
2143 if (shift != rshift)
2144 ucontrol->value.integer.value[1] =
2145 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
2147 ucontrol->value.integer.value[0] =
2148 max - ucontrol->value.integer.value[0];
2149 if (shift != rshift)
2150 ucontrol->value.integer.value[1] =
2151 max - ucontrol->value.integer.value[1];
2156 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
2159 * snd_soc_dapm_put_volsw - dapm mixer set callback
2160 * @kcontrol: mixer control
2161 * @ucontrol: control element information
2163 * Callback to set the value of a dapm mixer control.
2165 * Returns 0 for success.
2167 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
2168 struct snd_ctl_elem_value *ucontrol)
2170 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2171 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2172 struct snd_soc_codec *codec = widget->codec;
2173 struct soc_mixer_control *mc =
2174 (struct soc_mixer_control *)kcontrol->private_value;
2175 unsigned int reg = mc->reg;
2176 unsigned int shift = mc->shift;
2178 unsigned int mask = (1 << fls(max)) - 1;
2179 unsigned int invert = mc->invert;
2181 int connect, change;
2182 struct snd_soc_dapm_update update;
2185 val = (ucontrol->value.integer.value[0] & mask);
2189 mask = mask << shift;
2193 /* new connection */
2194 connect = invert ? 0 : 1;
2196 /* old connection must be powered down */
2197 connect = invert ? 1 : 0;
2199 mutex_lock(&codec->mutex);
2201 change = snd_soc_test_bits(widget->codec, reg, mask, val);
2203 for (wi = 0; wi < wlist->num_widgets; wi++) {
2204 widget = wlist->widgets[wi];
2206 widget->value = val;
2208 update.kcontrol = kcontrol;
2209 update.widget = widget;
2213 widget->dapm->update = &update;
2215 dapm_mixer_update_power(widget, kcontrol, connect);
2217 widget->dapm->update = NULL;
2221 mutex_unlock(&codec->mutex);
2224 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
2227 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
2228 * @kcontrol: mixer control
2229 * @ucontrol: control element information
2231 * Callback to get the value of a dapm enumerated double mixer control.
2233 * Returns 0 for success.
2235 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
2236 struct snd_ctl_elem_value *ucontrol)
2238 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2239 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2240 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2241 unsigned int val, bitmask;
2243 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2245 val = snd_soc_read(widget->codec, e->reg);
2246 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
2247 if (e->shift_l != e->shift_r)
2248 ucontrol->value.enumerated.item[1] =
2249 (val >> e->shift_r) & (bitmask - 1);
2253 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
2256 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
2257 * @kcontrol: mixer control
2258 * @ucontrol: control element information
2260 * Callback to set the value of a dapm enumerated double mixer control.
2262 * Returns 0 for success.
2264 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
2265 struct snd_ctl_elem_value *ucontrol)
2267 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2268 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2269 struct snd_soc_codec *codec = widget->codec;
2270 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2271 unsigned int val, mux, change;
2272 unsigned int mask, bitmask;
2273 struct snd_soc_dapm_update update;
2276 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2278 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2280 mux = ucontrol->value.enumerated.item[0];
2281 val = mux << e->shift_l;
2282 mask = (bitmask - 1) << e->shift_l;
2283 if (e->shift_l != e->shift_r) {
2284 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2286 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2287 mask |= (bitmask - 1) << e->shift_r;
2290 mutex_lock(&codec->mutex);
2292 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2294 for (wi = 0; wi < wlist->num_widgets; wi++) {
2295 widget = wlist->widgets[wi];
2297 widget->value = val;
2299 update.kcontrol = kcontrol;
2300 update.widget = widget;
2301 update.reg = e->reg;
2304 widget->dapm->update = &update;
2306 dapm_mux_update_power(widget, kcontrol, change, mux, e);
2308 widget->dapm->update = NULL;
2312 mutex_unlock(&codec->mutex);
2315 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
2318 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
2319 * @kcontrol: mixer control
2320 * @ucontrol: control element information
2322 * Returns 0 for success.
2324 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
2325 struct snd_ctl_elem_value *ucontrol)
2327 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2328 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2330 ucontrol->value.enumerated.item[0] = widget->value;
2334 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt);
2337 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
2338 * @kcontrol: mixer control
2339 * @ucontrol: control element information
2341 * Returns 0 for success.
2343 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
2344 struct snd_ctl_elem_value *ucontrol)
2346 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2347 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2348 struct snd_soc_codec *codec = widget->codec;
2349 struct soc_enum *e =
2350 (struct soc_enum *)kcontrol->private_value;
2355 if (ucontrol->value.enumerated.item[0] >= e->max)
2358 mutex_lock(&codec->mutex);
2360 change = widget->value != ucontrol->value.enumerated.item[0];
2362 for (wi = 0; wi < wlist->num_widgets; wi++) {
2363 widget = wlist->widgets[wi];
2365 widget->value = ucontrol->value.enumerated.item[0];
2367 dapm_mux_update_power(widget, kcontrol, change,
2372 mutex_unlock(&codec->mutex);
2375 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt);
2378 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
2380 * @kcontrol: mixer control
2381 * @ucontrol: control element information
2383 * Callback to get the value of a dapm semi enumerated double mixer control.
2385 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2386 * used for handling bitfield coded enumeration for example.
2388 * Returns 0 for success.
2390 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
2391 struct snd_ctl_elem_value *ucontrol)
2393 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2394 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2395 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2396 unsigned int reg_val, val, mux;
2398 reg_val = snd_soc_read(widget->codec, e->reg);
2399 val = (reg_val >> e->shift_l) & e->mask;
2400 for (mux = 0; mux < e->max; mux++) {
2401 if (val == e->values[mux])
2404 ucontrol->value.enumerated.item[0] = mux;
2405 if (e->shift_l != e->shift_r) {
2406 val = (reg_val >> e->shift_r) & e->mask;
2407 for (mux = 0; mux < e->max; mux++) {
2408 if (val == e->values[mux])
2411 ucontrol->value.enumerated.item[1] = mux;
2416 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
2419 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
2421 * @kcontrol: mixer control
2422 * @ucontrol: control element information
2424 * Callback to set the value of a dapm semi enumerated double mixer control.
2426 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2427 * used for handling bitfield coded enumeration for example.
2429 * Returns 0 for success.
2431 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
2432 struct snd_ctl_elem_value *ucontrol)
2434 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2435 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2436 struct snd_soc_codec *codec = widget->codec;
2437 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2438 unsigned int val, mux, change;
2440 struct snd_soc_dapm_update update;
2443 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2445 mux = ucontrol->value.enumerated.item[0];
2446 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2447 mask = e->mask << e->shift_l;
2448 if (e->shift_l != e->shift_r) {
2449 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2451 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2452 mask |= e->mask << e->shift_r;
2455 mutex_lock(&codec->mutex);
2457 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2459 for (wi = 0; wi < wlist->num_widgets; wi++) {
2460 widget = wlist->widgets[wi];
2462 widget->value = val;
2464 update.kcontrol = kcontrol;
2465 update.widget = widget;
2466 update.reg = e->reg;
2469 widget->dapm->update = &update;
2471 dapm_mux_update_power(widget, kcontrol, change, mux, e);
2473 widget->dapm->update = NULL;
2477 mutex_unlock(&codec->mutex);
2480 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
2483 * snd_soc_dapm_info_pin_switch - Info for a pin switch
2485 * @kcontrol: mixer control
2486 * @uinfo: control element information
2488 * Callback to provide information about a pin switch control.
2490 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
2491 struct snd_ctl_elem_info *uinfo)
2493 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2495 uinfo->value.integer.min = 0;
2496 uinfo->value.integer.max = 1;
2500 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
2503 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
2505 * @kcontrol: mixer control
2508 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
2509 struct snd_ctl_elem_value *ucontrol)
2511 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2512 const char *pin = (const char *)kcontrol->private_value;
2514 mutex_lock(&codec->mutex);
2516 ucontrol->value.integer.value[0] =
2517 snd_soc_dapm_get_pin_status(&codec->dapm, pin);
2519 mutex_unlock(&codec->mutex);
2523 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
2526 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
2528 * @kcontrol: mixer control
2531 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
2532 struct snd_ctl_elem_value *ucontrol)
2534 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2535 const char *pin = (const char *)kcontrol->private_value;
2537 mutex_lock(&codec->mutex);
2539 if (ucontrol->value.integer.value[0])
2540 snd_soc_dapm_enable_pin(&codec->dapm, pin);
2542 snd_soc_dapm_disable_pin(&codec->dapm, pin);
2544 snd_soc_dapm_sync(&codec->dapm);
2546 mutex_unlock(&codec->mutex);
2550 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
2553 * snd_soc_dapm_new_control - create new dapm control
2554 * @dapm: DAPM context
2555 * @widget: widget template
2557 * Creates a new dapm control based upon the template.
2559 * Returns 0 for success else error.
2561 int snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
2562 const struct snd_soc_dapm_widget *widget)
2564 struct snd_soc_dapm_widget *w;
2567 if ((w = dapm_cnew_widget(widget)) == NULL)
2570 name_len = strlen(widget->name) + 1;
2571 if (dapm->codec && dapm->codec->name_prefix)
2572 name_len += 1 + strlen(dapm->codec->name_prefix);
2573 w->name = kmalloc(name_len, GFP_KERNEL);
2574 if (w->name == NULL) {
2578 if (dapm->codec && dapm->codec->name_prefix)
2579 snprintf(w->name, name_len, "%s %s",
2580 dapm->codec->name_prefix, widget->name);
2582 snprintf(w->name, name_len, "%s", widget->name);
2586 w->codec = dapm->codec;
2587 w->platform = dapm->platform;
2588 INIT_LIST_HEAD(&w->sources);
2589 INIT_LIST_HEAD(&w->sinks);
2590 INIT_LIST_HEAD(&w->list);
2591 list_add(&w->list, &dapm->card->widgets);
2593 /* machine layer set ups unconnected pins and insertions */
2597 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
2600 * snd_soc_dapm_new_controls - create new dapm controls
2601 * @dapm: DAPM context
2602 * @widget: widget array
2603 * @num: number of widgets
2605 * Creates new DAPM controls based upon the templates.
2607 * Returns 0 for success else error.
2609 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
2610 const struct snd_soc_dapm_widget *widget,
2615 for (i = 0; i < num; i++) {
2616 ret = snd_soc_dapm_new_control(dapm, widget);
2619 "ASoC: Failed to create DAPM control %s: %d\n",
2627 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
2629 static void soc_dapm_stream_event(struct snd_soc_dapm_context *dapm,
2630 const char *stream, int event)
2632 struct snd_soc_dapm_widget *w;
2634 list_for_each_entry(w, &dapm->card->widgets, list)
2636 if (!w->sname || w->dapm != dapm)
2638 dev_vdbg(w->dapm->dev, "widget %s\n %s stream %s event %d\n",
2639 w->name, w->sname, stream, event);
2640 if (strstr(w->sname, stream)) {
2642 case SND_SOC_DAPM_STREAM_START:
2645 case SND_SOC_DAPM_STREAM_STOP:
2648 case SND_SOC_DAPM_STREAM_SUSPEND:
2649 case SND_SOC_DAPM_STREAM_RESUME:
2650 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
2651 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
2657 dapm_power_widgets(dapm, event);
2659 /* do we need to notify any clients that DAPM stream is complete */
2660 if (dapm->stream_event)
2661 dapm->stream_event(dapm, event);
2665 * snd_soc_dapm_stream_event - send a stream event to the dapm core
2666 * @rtd: PCM runtime data
2667 * @stream: stream name
2668 * @event: stream event
2670 * Sends a stream event to the dapm core. The core then makes any
2671 * necessary widget power changes.
2673 * Returns 0 for success else error.
2675 int snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd,
2676 const char *stream, int event)
2678 struct snd_soc_codec *codec = rtd->codec;
2683 mutex_lock(&codec->mutex);
2684 soc_dapm_stream_event(&codec->dapm, stream, event);
2685 mutex_unlock(&codec->mutex);
2690 * snd_soc_dapm_enable_pin - enable pin.
2691 * @dapm: DAPM context
2694 * Enables input/output pin and its parents or children widgets iff there is
2695 * a valid audio route and active audio stream.
2696 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2697 * do any widget power switching.
2699 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
2701 return snd_soc_dapm_set_pin(dapm, pin, 1);
2703 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
2706 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
2707 * @dapm: DAPM context
2710 * Enables input/output pin regardless of any other state. This is
2711 * intended for use with microphone bias supplies used in microphone
2714 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2715 * do any widget power switching.
2717 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
2720 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2723 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
2727 dev_dbg(w->dapm->dev, "dapm: force enable pin %s\n", pin);
2733 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
2736 * snd_soc_dapm_disable_pin - disable pin.
2737 * @dapm: DAPM context
2740 * Disables input/output pin and its parents or children widgets.
2741 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2742 * do any widget power switching.
2744 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
2747 return snd_soc_dapm_set_pin(dapm, pin, 0);
2749 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
2752 * snd_soc_dapm_nc_pin - permanently disable pin.
2753 * @dapm: DAPM context
2756 * Marks the specified pin as being not connected, disabling it along
2757 * any parent or child widgets. At present this is identical to
2758 * snd_soc_dapm_disable_pin() but in future it will be extended to do
2759 * additional things such as disabling controls which only affect
2760 * paths through the pin.
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_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
2767 return snd_soc_dapm_set_pin(dapm, pin, 0);
2769 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
2772 * snd_soc_dapm_get_pin_status - get audio pin status
2773 * @dapm: DAPM context
2774 * @pin: audio signal pin endpoint (or start point)
2776 * Get audio pin status - connected or disconnected.
2778 * Returns 1 for connected otherwise 0.
2780 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
2783 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2786 return w->connected;
2790 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
2793 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
2794 * @dapm: DAPM context
2795 * @pin: audio signal pin endpoint (or start point)
2797 * Mark the given endpoint or pin as ignoring suspend. When the
2798 * system is disabled a path between two endpoints flagged as ignoring
2799 * suspend will not be disabled. The path must already be enabled via
2800 * normal means at suspend time, it will not be turned on if it was not
2803 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
2806 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
2809 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
2813 w->ignore_suspend = 1;
2817 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
2820 * snd_soc_dapm_free - free dapm resources
2821 * @dapm: DAPM context
2823 * Free all dapm widgets and resources.
2825 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
2827 snd_soc_dapm_sys_remove(dapm->dev);
2828 dapm_debugfs_cleanup(dapm);
2829 dapm_free_widgets(dapm);
2830 list_del(&dapm->list);
2832 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
2834 static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context *dapm)
2836 struct snd_soc_dapm_widget *w;
2837 LIST_HEAD(down_list);
2840 list_for_each_entry(w, &dapm->card->widgets, list) {
2841 if (w->dapm != dapm)
2844 dapm_seq_insert(w, &down_list, false);
2850 /* If there were no widgets to power down we're already in
2854 snd_soc_dapm_set_bias_level(dapm, SND_SOC_BIAS_PREPARE);
2855 dapm_seq_run(dapm, &down_list, 0, false);
2856 snd_soc_dapm_set_bias_level(dapm, SND_SOC_BIAS_STANDBY);
2861 * snd_soc_dapm_shutdown - callback for system shutdown
2863 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
2865 struct snd_soc_codec *codec;
2867 list_for_each_entry(codec, &card->codec_dev_list, list) {
2868 soc_dapm_shutdown_codec(&codec->dapm);
2869 snd_soc_dapm_set_bias_level(&codec->dapm, SND_SOC_BIAS_OFF);
2873 /* Module information */
2874 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2875 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
2876 MODULE_LICENSE("GPL");