2 * soc-dapm.c -- ALSA SoC Dynamic Audio Power Management
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
13 * o Changes power status of internal codec blocks depending on the
14 * dynamic configuration of codec internal audio paths and active
16 * o Platform power domain - can support external components i.e. amps and
17 * mic/meadphone insertion events.
18 * o Automatic Mic Bias support
19 * o Jack insertion power event initiation - e.g. hp insertion will enable
21 * o Delayed powerdown of audio susbsystem to reduce pops between a quick
25 * o DAPM power change sequencing - allow for configurable per
27 * o Support for analogue bias optimisation.
28 * o Support for reduced codec oversampling rates.
29 * o Support for reduced codec bias currents.
32 #include <linux/module.h>
33 #include <linux/moduleparam.h>
34 #include <linux/init.h>
35 #include <linux/async.h>
36 #include <linux/delay.h>
38 #include <linux/bitops.h>
39 #include <linux/platform_device.h>
40 #include <linux/jiffies.h>
41 #include <linux/debugfs.h>
42 #include <linux/slab.h>
43 #include <sound/core.h>
44 #include <sound/pcm.h>
45 #include <sound/pcm_params.h>
46 #include <sound/soc.h>
47 #include <sound/initval.h>
49 #include <trace/events/asoc.h>
51 #define DAPM_UPDATE_STAT(widget, val) widget->dapm->card->dapm_stats.val++;
53 /* dapm power sequences - make this per codec in the future */
54 static int dapm_up_seq[] = {
55 [snd_soc_dapm_pre] = 0,
56 [snd_soc_dapm_supply] = 1,
57 [snd_soc_dapm_micbias] = 2,
58 [snd_soc_dapm_aif_in] = 3,
59 [snd_soc_dapm_aif_out] = 3,
60 [snd_soc_dapm_mic] = 4,
61 [snd_soc_dapm_mux] = 5,
62 [snd_soc_dapm_virt_mux] = 5,
63 [snd_soc_dapm_value_mux] = 5,
64 [snd_soc_dapm_dac] = 6,
65 [snd_soc_dapm_mixer] = 7,
66 [snd_soc_dapm_mixer_named_ctl] = 7,
67 [snd_soc_dapm_pga] = 8,
68 [snd_soc_dapm_adc] = 9,
69 [snd_soc_dapm_out_drv] = 10,
70 [snd_soc_dapm_hp] = 10,
71 [snd_soc_dapm_spk] = 10,
72 [snd_soc_dapm_post] = 11,
75 static int dapm_down_seq[] = {
76 [snd_soc_dapm_pre] = 0,
77 [snd_soc_dapm_adc] = 1,
78 [snd_soc_dapm_hp] = 2,
79 [snd_soc_dapm_spk] = 2,
80 [snd_soc_dapm_out_drv] = 2,
81 [snd_soc_dapm_pga] = 4,
82 [snd_soc_dapm_mixer_named_ctl] = 5,
83 [snd_soc_dapm_mixer] = 5,
84 [snd_soc_dapm_dac] = 6,
85 [snd_soc_dapm_mic] = 7,
86 [snd_soc_dapm_micbias] = 8,
87 [snd_soc_dapm_mux] = 9,
88 [snd_soc_dapm_virt_mux] = 9,
89 [snd_soc_dapm_value_mux] = 9,
90 [snd_soc_dapm_aif_in] = 10,
91 [snd_soc_dapm_aif_out] = 10,
92 [snd_soc_dapm_supply] = 11,
93 [snd_soc_dapm_post] = 12,
96 static void pop_wait(u32 pop_time)
99 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
102 static void pop_dbg(struct device *dev, u32 pop_time, const char *fmt, ...)
110 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
115 vsnprintf(buf, PAGE_SIZE, fmt, args);
116 dev_info(dev, "%s", buf);
122 static bool dapm_dirty_widget(struct snd_soc_dapm_widget *w)
124 return !list_empty(&w->dirty);
127 static void dapm_mark_dirty(struct snd_soc_dapm_widget *w, 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);
136 /* create a new dapm widget */
137 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
138 const struct snd_soc_dapm_widget *_widget)
140 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
143 /* get snd_card from DAPM context */
144 static inline struct snd_card *dapm_get_snd_card(
145 struct snd_soc_dapm_context *dapm)
148 return dapm->codec->card->snd_card;
149 else if (dapm->platform)
150 return dapm->platform->card->snd_card;
158 /* get soc_card from DAPM context */
159 static inline struct snd_soc_card *dapm_get_soc_card(
160 struct snd_soc_dapm_context *dapm)
163 return dapm->codec->card;
164 else if (dapm->platform)
165 return dapm->platform->card;
173 static int soc_widget_read(struct snd_soc_dapm_widget *w, int reg)
176 return snd_soc_read(w->codec, reg);
177 else if (w->platform)
178 return snd_soc_platform_read(w->platform, reg);
180 dev_err(w->dapm->dev, "no valid widget read method\n");
184 static int soc_widget_write(struct snd_soc_dapm_widget *w, int reg, int val)
187 return snd_soc_write(w->codec, reg, val);
188 else if (w->platform)
189 return snd_soc_platform_write(w->platform, reg, val);
191 dev_err(w->dapm->dev, "no valid widget write method\n");
195 static int soc_widget_update_bits(struct snd_soc_dapm_widget *w,
196 unsigned short reg, unsigned int mask, unsigned int value)
199 unsigned int old, new;
202 ret = soc_widget_read(w, reg);
207 new = (old & ~mask) | (value & mask);
210 ret = soc_widget_write(w, reg, new);
219 * snd_soc_dapm_set_bias_level - set the bias level for the system
220 * @dapm: DAPM context
221 * @level: level to configure
223 * Configure the bias (power) levels for the SoC audio device.
225 * Returns 0 for success else error.
227 static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm,
228 enum snd_soc_bias_level level)
230 struct snd_soc_card *card = dapm->card;
233 trace_snd_soc_bias_level_start(card, level);
235 if (card && card->set_bias_level)
236 ret = card->set_bias_level(card, dapm, level);
241 if (dapm->codec->driver->set_bias_level)
242 ret = dapm->codec->driver->set_bias_level(dapm->codec,
245 dapm->bias_level = level;
250 if (card && card->set_bias_level_post)
251 ret = card->set_bias_level_post(card, dapm, level);
253 trace_snd_soc_bias_level_done(card, level);
258 /* set up initial codec paths */
259 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
260 struct snd_soc_dapm_path *p, int i)
263 case snd_soc_dapm_switch:
264 case snd_soc_dapm_mixer:
265 case snd_soc_dapm_mixer_named_ctl: {
267 struct soc_mixer_control *mc = (struct soc_mixer_control *)
268 w->kcontrol_news[i].private_value;
269 unsigned int reg = mc->reg;
270 unsigned int shift = mc->shift;
272 unsigned int mask = (1 << fls(max)) - 1;
273 unsigned int invert = mc->invert;
275 val = soc_widget_read(w, reg);
276 val = (val >> shift) & mask;
278 if ((invert && !val) || (!invert && val))
284 case snd_soc_dapm_mux: {
285 struct soc_enum *e = (struct soc_enum *)
286 w->kcontrol_news[i].private_value;
287 int val, item, bitmask;
289 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
291 val = soc_widget_read(w, e->reg);
292 item = (val >> e->shift_l) & (bitmask - 1);
295 for (i = 0; i < e->max; i++) {
296 if (!(strcmp(p->name, e->texts[i])) && item == i)
301 case snd_soc_dapm_virt_mux: {
302 struct soc_enum *e = (struct soc_enum *)
303 w->kcontrol_news[i].private_value;
306 /* since a virtual mux has no backing registers to
307 * decide which path to connect, it will try to match
308 * with the first enumeration. This is to ensure
309 * that the default mux choice (the first) will be
310 * correctly powered up during initialization.
312 if (!strcmp(p->name, e->texts[0]))
316 case snd_soc_dapm_value_mux: {
317 struct soc_enum *e = (struct soc_enum *)
318 w->kcontrol_news[i].private_value;
321 val = soc_widget_read(w, e->reg);
322 val = (val >> e->shift_l) & e->mask;
323 for (item = 0; item < e->max; item++) {
324 if (val == e->values[item])
329 for (i = 0; i < e->max; i++) {
330 if (!(strcmp(p->name, e->texts[i])) && item == i)
335 /* does not affect routing - always connected */
336 case snd_soc_dapm_pga:
337 case snd_soc_dapm_out_drv:
338 case snd_soc_dapm_output:
339 case snd_soc_dapm_adc:
340 case snd_soc_dapm_input:
341 case snd_soc_dapm_dac:
342 case snd_soc_dapm_micbias:
343 case snd_soc_dapm_vmid:
344 case snd_soc_dapm_supply:
345 case snd_soc_dapm_aif_in:
346 case snd_soc_dapm_aif_out:
347 case snd_soc_dapm_hp:
348 case snd_soc_dapm_mic:
349 case snd_soc_dapm_spk:
350 case snd_soc_dapm_line:
353 /* does affect routing - dynamically connected */
354 case snd_soc_dapm_pre:
355 case snd_soc_dapm_post:
361 /* connect mux widget to its interconnecting audio paths */
362 static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
363 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
364 struct snd_soc_dapm_path *path, const char *control_name,
365 const struct snd_kcontrol_new *kcontrol)
367 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
370 for (i = 0; i < e->max; i++) {
371 if (!(strcmp(control_name, e->texts[i]))) {
372 list_add(&path->list, &dapm->card->paths);
373 list_add(&path->list_sink, &dest->sources);
374 list_add(&path->list_source, &src->sinks);
375 path->name = (char*)e->texts[i];
376 dapm_set_path_status(dest, path, 0);
384 /* connect mixer widget to its interconnecting audio paths */
385 static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
386 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
387 struct snd_soc_dapm_path *path, const char *control_name)
391 /* search for mixer kcontrol */
392 for (i = 0; i < dest->num_kcontrols; i++) {
393 if (!strcmp(control_name, dest->kcontrol_news[i].name)) {
394 list_add(&path->list, &dapm->card->paths);
395 list_add(&path->list_sink, &dest->sources);
396 list_add(&path->list_source, &src->sinks);
397 path->name = dest->kcontrol_news[i].name;
398 dapm_set_path_status(dest, path, i);
405 static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm,
406 struct snd_soc_dapm_widget *kcontrolw,
407 const struct snd_kcontrol_new *kcontrol_new,
408 struct snd_kcontrol **kcontrol)
410 struct snd_soc_dapm_widget *w;
415 list_for_each_entry(w, &dapm->card->widgets, list) {
416 if (w == kcontrolw || w->dapm != kcontrolw->dapm)
418 for (i = 0; i < w->num_kcontrols; i++) {
419 if (&w->kcontrol_news[i] == kcontrol_new) {
421 *kcontrol = w->kcontrols[i];
430 /* create new dapm mixer control */
431 static int dapm_new_mixer(struct snd_soc_dapm_widget *w)
433 struct snd_soc_dapm_context *dapm = w->dapm;
435 size_t name_len, prefix_len;
436 struct snd_soc_dapm_path *path;
437 struct snd_card *card = dapm->card->snd_card;
439 struct snd_soc_dapm_widget_list *wlist;
443 prefix = dapm->codec->name_prefix;
448 prefix_len = strlen(prefix) + 1;
453 for (i = 0; i < w->num_kcontrols; i++) {
456 list_for_each_entry(path, &w->sources, list_sink) {
458 /* mixer/mux paths name must match control name */
459 if (path->name != (char *)w->kcontrol_news[i].name)
462 if (w->kcontrols[i]) {
463 path->kcontrol = w->kcontrols[i];
467 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
468 sizeof(struct snd_soc_dapm_widget *),
469 wlist = kzalloc(wlistsize, GFP_KERNEL);
472 "asoc: can't allocate widget list for %s\n",
476 wlist->num_widgets = 1;
477 wlist->widgets[0] = w;
479 /* add dapm control with long name.
480 * for dapm_mixer this is the concatenation of the
481 * mixer and kcontrol name.
482 * for dapm_mixer_named_ctl this is simply the
485 name_len = strlen(w->kcontrol_news[i].name) + 1;
486 if (w->id != snd_soc_dapm_mixer_named_ctl)
487 name_len += 1 + strlen(w->name);
489 path->long_name = kmalloc(name_len, GFP_KERNEL);
491 if (path->long_name == NULL) {
498 /* The control will get a prefix from
499 * the control creation process but
500 * we're also using the same prefix
501 * for widgets so cut the prefix off
502 * the front of the widget name.
504 snprintf(path->long_name, name_len, "%s %s",
505 w->name + prefix_len,
506 w->kcontrol_news[i].name);
508 case snd_soc_dapm_mixer_named_ctl:
509 snprintf(path->long_name, name_len, "%s",
510 w->kcontrol_news[i].name);
514 path->long_name[name_len - 1] = '\0';
516 path->kcontrol = snd_soc_cnew(&w->kcontrol_news[i],
517 wlist, path->long_name,
519 ret = snd_ctl_add(card, path->kcontrol);
522 "asoc: failed to add dapm kcontrol %s: %d\n",
523 path->long_name, ret);
525 kfree(path->long_name);
526 path->long_name = NULL;
529 w->kcontrols[i] = path->kcontrol;
535 /* create new dapm mux control */
536 static int dapm_new_mux(struct snd_soc_dapm_widget *w)
538 struct snd_soc_dapm_context *dapm = w->dapm;
539 struct snd_soc_dapm_path *path = NULL;
540 struct snd_kcontrol *kcontrol;
541 struct snd_card *card = dapm->card->snd_card;
545 struct snd_soc_dapm_widget_list *wlist;
546 int shared, wlistentries;
550 if (w->num_kcontrols != 1) {
552 "asoc: mux %s has incorrect number of controls\n",
557 shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[0],
560 wlist = kcontrol->private_data;
561 wlistentries = wlist->num_widgets + 1;
566 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
567 wlistentries * sizeof(struct snd_soc_dapm_widget *),
568 wlist = krealloc(wlist, wlistsize, GFP_KERNEL);
571 "asoc: can't allocate widget list for %s\n", w->name);
574 wlist->num_widgets = wlistentries;
575 wlist->widgets[wlistentries - 1] = w;
579 prefix = dapm->codec->name_prefix;
584 name = w->kcontrol_news[0].name;
589 prefix_len = strlen(prefix) + 1;
595 * The control will get a prefix from the control creation
596 * process but we're also using the same prefix for widgets so
597 * cut the prefix off the front of the widget name.
599 kcontrol = snd_soc_cnew(&w->kcontrol_news[0], wlist,
600 name + prefix_len, prefix);
601 ret = snd_ctl_add(card, kcontrol);
603 dev_err(dapm->dev, "failed to add kcontrol %s: %d\n",
610 kcontrol->private_data = wlist;
612 w->kcontrols[0] = kcontrol;
614 list_for_each_entry(path, &w->sources, list_sink)
615 path->kcontrol = kcontrol;
620 /* create new dapm volume control */
621 static int dapm_new_pga(struct snd_soc_dapm_widget *w)
623 if (w->num_kcontrols)
624 dev_err(w->dapm->dev,
625 "asoc: PGA controls not supported: '%s'\n", w->name);
630 /* reset 'walked' bit for each dapm path */
631 static inline void dapm_clear_walk(struct snd_soc_dapm_context *dapm)
633 struct snd_soc_dapm_path *p;
635 list_for_each_entry(p, &dapm->card->paths, list)
639 /* We implement power down on suspend by checking the power state of
640 * the ALSA card - when we are suspending the ALSA state for the card
643 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
645 int level = snd_power_get_state(widget->dapm->card->snd_card);
648 case SNDRV_CTL_POWER_D3hot:
649 case SNDRV_CTL_POWER_D3cold:
650 if (widget->ignore_suspend)
651 dev_dbg(widget->dapm->dev, "%s ignoring suspend\n",
653 return widget->ignore_suspend;
660 * Recursively check for a completed path to an active or physically connected
661 * output widget. Returns number of complete paths.
663 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
665 struct snd_soc_dapm_path *path;
668 DAPM_UPDATE_STAT(widget, path_checks);
670 if (widget->id == snd_soc_dapm_supply)
673 switch (widget->id) {
674 case snd_soc_dapm_adc:
675 case snd_soc_dapm_aif_out:
677 return snd_soc_dapm_suspend_check(widget);
682 if (widget->connected) {
683 /* connected pin ? */
684 if (widget->id == snd_soc_dapm_output && !widget->ext)
685 return snd_soc_dapm_suspend_check(widget);
687 /* connected jack or spk ? */
688 if (widget->id == snd_soc_dapm_hp || widget->id == snd_soc_dapm_spk ||
689 (widget->id == snd_soc_dapm_line && !list_empty(&widget->sources)))
690 return snd_soc_dapm_suspend_check(widget);
693 list_for_each_entry(path, &widget->sinks, list_source) {
694 DAPM_UPDATE_STAT(widget, neighbour_checks);
702 if (path->sink && path->connect) {
704 con += is_connected_output_ep(path->sink);
712 * Recursively check for a completed path to an active or physically connected
713 * input widget. Returns number of complete paths.
715 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
717 struct snd_soc_dapm_path *path;
720 DAPM_UPDATE_STAT(widget, path_checks);
722 if (widget->id == snd_soc_dapm_supply)
725 /* active stream ? */
726 switch (widget->id) {
727 case snd_soc_dapm_dac:
728 case snd_soc_dapm_aif_in:
730 return snd_soc_dapm_suspend_check(widget);
735 if (widget->connected) {
736 /* connected pin ? */
737 if (widget->id == snd_soc_dapm_input && !widget->ext)
738 return snd_soc_dapm_suspend_check(widget);
740 /* connected VMID/Bias for lower pops */
741 if (widget->id == snd_soc_dapm_vmid)
742 return snd_soc_dapm_suspend_check(widget);
744 /* connected jack ? */
745 if (widget->id == snd_soc_dapm_mic ||
746 (widget->id == snd_soc_dapm_line && !list_empty(&widget->sinks)))
747 return snd_soc_dapm_suspend_check(widget);
750 list_for_each_entry(path, &widget->sources, list_sink) {
751 DAPM_UPDATE_STAT(widget, neighbour_checks);
759 if (path->source && path->connect) {
761 con += is_connected_input_ep(path->source);
769 * Handler for generic register modifier widget.
771 int dapm_reg_event(struct snd_soc_dapm_widget *w,
772 struct snd_kcontrol *kcontrol, int event)
776 if (SND_SOC_DAPM_EVENT_ON(event))
781 soc_widget_update_bits(w, -(w->reg + 1),
782 w->mask << w->shift, val << w->shift);
786 EXPORT_SYMBOL_GPL(dapm_reg_event);
788 static int dapm_widget_power_check(struct snd_soc_dapm_widget *w)
790 if (w->power_checked)
796 w->new_power = w->power_check(w);
798 w->power_checked = true;
803 /* Generic check to see if a widget should be powered.
805 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
809 DAPM_UPDATE_STAT(w, power_checks);
811 in = is_connected_input_ep(w);
812 dapm_clear_walk(w->dapm);
813 out = is_connected_output_ep(w);
814 dapm_clear_walk(w->dapm);
815 return out != 0 && in != 0;
818 /* Check to see if an ADC has power */
819 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
823 DAPM_UPDATE_STAT(w, power_checks);
826 in = is_connected_input_ep(w);
827 dapm_clear_walk(w->dapm);
830 return dapm_generic_check_power(w);
834 /* Check to see if a DAC has power */
835 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
839 DAPM_UPDATE_STAT(w, power_checks);
842 out = is_connected_output_ep(w);
843 dapm_clear_walk(w->dapm);
846 return dapm_generic_check_power(w);
850 /* Check to see if a power supply is needed */
851 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
853 struct snd_soc_dapm_path *path;
856 DAPM_UPDATE_STAT(w, power_checks);
858 /* Check if one of our outputs is connected */
859 list_for_each_entry(path, &w->sinks, list_source) {
860 DAPM_UPDATE_STAT(w, neighbour_checks);
865 if (path->connected &&
866 !path->connected(path->source, path->sink))
872 if (dapm_widget_power_check(path->sink)) {
878 dapm_clear_walk(w->dapm);
883 static int dapm_always_on_check_power(struct snd_soc_dapm_widget *w)
888 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
889 struct snd_soc_dapm_widget *b,
897 sort = dapm_down_seq;
899 if (sort[a->id] != sort[b->id])
900 return sort[a->id] - sort[b->id];
901 if (a->subseq != b->subseq) {
903 return a->subseq - b->subseq;
905 return b->subseq - a->subseq;
907 if (a->reg != b->reg)
908 return a->reg - b->reg;
909 if (a->dapm != b->dapm)
910 return (unsigned long)a->dapm - (unsigned long)b->dapm;
915 /* Insert a widget in order into a DAPM power sequence. */
916 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
917 struct list_head *list,
920 struct snd_soc_dapm_widget *w;
922 list_for_each_entry(w, list, power_list)
923 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
924 list_add_tail(&new_widget->power_list, &w->power_list);
928 list_add_tail(&new_widget->power_list, list);
931 static void dapm_seq_check_event(struct snd_soc_dapm_context *dapm,
932 struct snd_soc_dapm_widget *w, int event)
934 struct snd_soc_card *card = dapm->card;
939 case SND_SOC_DAPM_PRE_PMU:
943 case SND_SOC_DAPM_POST_PMU:
944 ev_name = "POST_PMU";
947 case SND_SOC_DAPM_PRE_PMD:
951 case SND_SOC_DAPM_POST_PMD:
952 ev_name = "POST_PMD";
960 if (w->power != power)
963 if (w->event && (w->event_flags & event)) {
964 pop_dbg(dapm->dev, card->pop_time, "pop test : %s %s\n",
966 trace_snd_soc_dapm_widget_event_start(w, event);
967 ret = w->event(w, NULL, event);
968 trace_snd_soc_dapm_widget_event_done(w, event);
970 pr_err("%s: %s event failed: %d\n",
971 ev_name, w->name, ret);
975 /* Apply the coalesced changes from a DAPM sequence */
976 static void dapm_seq_run_coalesced(struct snd_soc_dapm_context *dapm,
977 struct list_head *pending)
979 struct snd_soc_card *card = dapm->card;
980 struct snd_soc_dapm_widget *w;
982 unsigned int value = 0;
983 unsigned int mask = 0;
984 unsigned int cur_mask;
986 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
989 list_for_each_entry(w, pending, power_list) {
990 cur_mask = 1 << w->shift;
991 BUG_ON(reg != w->reg);
1002 pop_dbg(dapm->dev, card->pop_time,
1003 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
1004 w->name, reg, value, mask);
1006 /* Check for events */
1007 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMU);
1008 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMD);
1012 /* Any widget will do, they should all be updating the
1015 w = list_first_entry(pending, struct snd_soc_dapm_widget,
1018 pop_dbg(dapm->dev, card->pop_time,
1019 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
1020 value, mask, reg, card->pop_time);
1021 pop_wait(card->pop_time);
1022 soc_widget_update_bits(w, reg, mask, value);
1025 list_for_each_entry(w, pending, power_list) {
1026 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMU);
1027 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMD);
1031 /* Apply a DAPM power sequence.
1033 * We walk over a pre-sorted list of widgets to apply power to. In
1034 * order to minimise the number of writes to the device required
1035 * multiple widgets will be updated in a single write where possible.
1036 * Currently anything that requires more than a single write is not
1039 static void dapm_seq_run(struct snd_soc_dapm_context *dapm,
1040 struct list_head *list, int event, bool power_up)
1042 struct snd_soc_dapm_widget *w, *n;
1045 int cur_subseq = -1;
1046 int cur_reg = SND_SOC_NOPM;
1047 struct snd_soc_dapm_context *cur_dapm = NULL;
1054 sort = dapm_down_seq;
1056 list_for_each_entry_safe(w, n, list, power_list) {
1059 /* Do we need to apply any queued changes? */
1060 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
1061 w->dapm != cur_dapm || w->subseq != cur_subseq) {
1062 if (!list_empty(&pending))
1063 dapm_seq_run_coalesced(cur_dapm, &pending);
1065 if (cur_dapm && cur_dapm->seq_notifier) {
1066 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1067 if (sort[i] == cur_sort)
1068 cur_dapm->seq_notifier(cur_dapm,
1073 INIT_LIST_HEAD(&pending);
1075 cur_subseq = INT_MIN;
1076 cur_reg = SND_SOC_NOPM;
1081 case snd_soc_dapm_pre:
1083 list_for_each_entry_safe_continue(w, n, list,
1086 if (event == SND_SOC_DAPM_STREAM_START)
1088 NULL, SND_SOC_DAPM_PRE_PMU);
1089 else if (event == SND_SOC_DAPM_STREAM_STOP)
1091 NULL, SND_SOC_DAPM_PRE_PMD);
1094 case snd_soc_dapm_post:
1096 list_for_each_entry_safe_continue(w, n, list,
1099 if (event == SND_SOC_DAPM_STREAM_START)
1101 NULL, SND_SOC_DAPM_POST_PMU);
1102 else if (event == SND_SOC_DAPM_STREAM_STOP)
1104 NULL, SND_SOC_DAPM_POST_PMD);
1108 /* Queue it up for application */
1109 cur_sort = sort[w->id];
1110 cur_subseq = w->subseq;
1113 list_move(&w->power_list, &pending);
1118 dev_err(w->dapm->dev,
1119 "Failed to apply widget power: %d\n", ret);
1122 if (!list_empty(&pending))
1123 dapm_seq_run_coalesced(cur_dapm, &pending);
1125 if (cur_dapm && cur_dapm->seq_notifier) {
1126 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1127 if (sort[i] == cur_sort)
1128 cur_dapm->seq_notifier(cur_dapm,
1133 static void dapm_widget_update(struct snd_soc_dapm_context *dapm)
1135 struct snd_soc_dapm_update *update = dapm->update;
1136 struct snd_soc_dapm_widget *w;
1145 (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
1146 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
1148 pr_err("%s DAPM pre-event failed: %d\n",
1152 ret = snd_soc_update_bits(w->codec, update->reg, update->mask,
1155 pr_err("%s DAPM update failed: %d\n", w->name, ret);
1158 (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1159 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1161 pr_err("%s DAPM post-event failed: %d\n",
1166 /* Async callback run prior to DAPM sequences - brings to _PREPARE if
1167 * they're changing state.
1169 static void dapm_pre_sequence_async(void *data, async_cookie_t cookie)
1171 struct snd_soc_dapm_context *d = data;
1174 /* If we're off and we're not supposed to be go into STANDBY */
1175 if (d->bias_level == SND_SOC_BIAS_OFF &&
1176 d->target_bias_level != SND_SOC_BIAS_OFF) {
1177 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1180 "Failed to turn on bias: %d\n", ret);
1183 /* Prepare for a STADDBY->ON or ON->STANDBY transition */
1184 if (d->bias_level != d->target_bias_level) {
1185 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);
1188 "Failed to prepare bias: %d\n", ret);
1192 /* Async callback run prior to DAPM sequences - brings to their final
1195 static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
1197 struct snd_soc_dapm_context *d = data;
1200 /* If we just powered the last thing off drop to standby bias */
1201 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1202 (d->target_bias_level == SND_SOC_BIAS_STANDBY ||
1203 d->target_bias_level == SND_SOC_BIAS_OFF)) {
1204 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1206 dev_err(d->dev, "Failed to apply standby bias: %d\n",
1210 /* If we're in standby and can support bias off then do that */
1211 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1212 d->target_bias_level == SND_SOC_BIAS_OFF) {
1213 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);
1215 dev_err(d->dev, "Failed to turn off bias: %d\n", ret);
1218 /* If we just powered up then move to active bias */
1219 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1220 d->target_bias_level == SND_SOC_BIAS_ON) {
1221 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);
1223 dev_err(d->dev, "Failed to apply active bias: %d\n",
1228 static void dapm_widget_set_peer_power(struct snd_soc_dapm_widget *peer,
1229 bool power, bool connect)
1231 /* If a connection is being made or broken then that update
1232 * will have marked the peer dirty, otherwise the widgets are
1233 * not connected and this update has no impact. */
1237 /* If the peer is already in the state we're moving to then we
1238 * won't have an impact on it. */
1239 if (power != peer->power)
1240 dapm_mark_dirty(peer, "peer state change");
1243 static void dapm_widget_set_power(struct snd_soc_dapm_widget *w, bool power,
1244 struct list_head *up_list,
1245 struct list_head *down_list)
1247 struct snd_soc_dapm_path *path;
1249 if (w->power == power)
1252 trace_snd_soc_dapm_widget_power(w, power);
1254 /* If we changed our power state perhaps our neigbours changed
1257 list_for_each_entry(path, &w->sources, list_sink) {
1259 dapm_widget_set_peer_power(path->source, power,
1263 list_for_each_entry(path, &w->sinks, list_source) {
1265 dapm_widget_set_peer_power(path->sink, power,
1271 dapm_seq_insert(w, up_list, true);
1273 dapm_seq_insert(w, down_list, false);
1278 static void dapm_power_one_widget(struct snd_soc_dapm_widget *w,
1279 struct list_head *up_list,
1280 struct list_head *down_list)
1285 case snd_soc_dapm_pre:
1286 dapm_seq_insert(w, down_list, false);
1288 case snd_soc_dapm_post:
1289 dapm_seq_insert(w, up_list, true);
1293 power = dapm_widget_power_check(w);
1295 dapm_widget_set_power(w, power, up_list, down_list);
1301 * Scan each dapm widget for complete audio path.
1302 * A complete path is a route that has valid endpoints i.e.:-
1304 * o DAC to output pin.
1305 * o Input Pin to ADC.
1306 * o Input pin to Output pin (bypass, sidetone)
1307 * o DAC to ADC (loopback).
1309 static int dapm_power_widgets(struct snd_soc_dapm_context *dapm, int event)
1311 struct snd_soc_card *card = dapm->card;
1312 struct snd_soc_dapm_widget *w;
1313 struct snd_soc_dapm_context *d;
1315 LIST_HEAD(down_list);
1316 LIST_HEAD(async_domain);
1317 enum snd_soc_bias_level bias;
1319 trace_snd_soc_dapm_start(card);
1321 list_for_each_entry(d, &card->dapm_list, list) {
1322 if (d->n_widgets || d->codec == NULL) {
1323 if (d->idle_bias_off)
1324 d->target_bias_level = SND_SOC_BIAS_OFF;
1326 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1330 memset(&card->dapm_stats, 0, sizeof(card->dapm_stats));
1332 list_for_each_entry(w, &card->widgets, list) {
1333 w->power_checked = false;
1336 /* Check which widgets we need to power and store them in
1337 * lists indicating if they should be powered up or down. We
1338 * only check widgets that have been flagged as dirty but note
1339 * that new widgets may be added to the dirty list while we
1342 list_for_each_entry(w, &card->dapm_dirty, dirty) {
1343 dapm_power_one_widget(w, &up_list, &down_list);
1346 list_for_each_entry(w, &card->widgets, list) {
1347 list_del_init(&w->dirty);
1352 /* Supplies and micbiases only bring the
1353 * context up to STANDBY as unless something
1354 * else is active and passing audio they
1355 * generally don't require full power.
1358 case snd_soc_dapm_supply:
1359 case snd_soc_dapm_micbias:
1360 if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
1361 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1364 d->target_bias_level = SND_SOC_BIAS_ON;
1371 /* If there are no DAPM widgets then try to figure out power from the
1374 if (!dapm->n_widgets) {
1376 case SND_SOC_DAPM_STREAM_START:
1377 case SND_SOC_DAPM_STREAM_RESUME:
1378 dapm->target_bias_level = SND_SOC_BIAS_ON;
1380 case SND_SOC_DAPM_STREAM_STOP:
1381 if (dapm->codec->active)
1382 dapm->target_bias_level = SND_SOC_BIAS_ON;
1384 dapm->target_bias_level = SND_SOC_BIAS_STANDBY;
1386 case SND_SOC_DAPM_STREAM_SUSPEND:
1387 dapm->target_bias_level = SND_SOC_BIAS_STANDBY;
1389 case SND_SOC_DAPM_STREAM_NOP:
1390 dapm->target_bias_level = dapm->bias_level;
1397 /* Force all contexts in the card to the same bias state if
1398 * they're not ground referenced.
1400 bias = SND_SOC_BIAS_OFF;
1401 list_for_each_entry(d, &card->dapm_list, list)
1402 if (d->target_bias_level > bias)
1403 bias = d->target_bias_level;
1404 list_for_each_entry(d, &card->dapm_list, list)
1405 if (!d->idle_bias_off)
1406 d->target_bias_level = bias;
1408 trace_snd_soc_dapm_walk_done(card);
1410 /* Run all the bias changes in parallel */
1411 list_for_each_entry(d, &dapm->card->dapm_list, list)
1412 async_schedule_domain(dapm_pre_sequence_async, d,
1414 async_synchronize_full_domain(&async_domain);
1416 /* Power down widgets first; try to avoid amplifying pops. */
1417 dapm_seq_run(dapm, &down_list, event, false);
1419 dapm_widget_update(dapm);
1422 dapm_seq_run(dapm, &up_list, event, true);
1424 /* Run all the bias changes in parallel */
1425 list_for_each_entry(d, &dapm->card->dapm_list, list)
1426 async_schedule_domain(dapm_post_sequence_async, d,
1428 async_synchronize_full_domain(&async_domain);
1430 pop_dbg(dapm->dev, card->pop_time,
1431 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
1432 pop_wait(card->pop_time);
1434 trace_snd_soc_dapm_done(card);
1439 #ifdef CONFIG_DEBUG_FS
1440 static int dapm_widget_power_open_file(struct inode *inode, struct file *file)
1442 file->private_data = inode->i_private;
1446 static ssize_t dapm_widget_power_read_file(struct file *file,
1447 char __user *user_buf,
1448 size_t count, loff_t *ppos)
1450 struct snd_soc_dapm_widget *w = file->private_data;
1454 struct snd_soc_dapm_path *p = NULL;
1456 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1460 in = is_connected_input_ep(w);
1461 dapm_clear_walk(w->dapm);
1462 out = is_connected_output_ep(w);
1463 dapm_clear_walk(w->dapm);
1465 ret = snprintf(buf, PAGE_SIZE, "%s: %s in %d out %d",
1466 w->name, w->power ? "On" : "Off", in, out);
1469 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1470 " - R%d(0x%x) bit %d",
1471 w->reg, w->reg, w->shift);
1473 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1476 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1478 w->active ? "active" : "inactive");
1480 list_for_each_entry(p, &w->sources, list_sink) {
1481 if (p->connected && !p->connected(w, p->sink))
1485 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1486 " in \"%s\" \"%s\"\n",
1487 p->name ? p->name : "static",
1490 list_for_each_entry(p, &w->sinks, list_source) {
1491 if (p->connected && !p->connected(w, p->sink))
1495 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1496 " out \"%s\" \"%s\"\n",
1497 p->name ? p->name : "static",
1501 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1507 static const struct file_operations dapm_widget_power_fops = {
1508 .open = dapm_widget_power_open_file,
1509 .read = dapm_widget_power_read_file,
1510 .llseek = default_llseek,
1513 static int dapm_bias_open_file(struct inode *inode, struct file *file)
1515 file->private_data = inode->i_private;
1519 static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
1520 size_t count, loff_t *ppos)
1522 struct snd_soc_dapm_context *dapm = file->private_data;
1525 switch (dapm->bias_level) {
1526 case SND_SOC_BIAS_ON:
1529 case SND_SOC_BIAS_PREPARE:
1530 level = "Prepare\n";
1532 case SND_SOC_BIAS_STANDBY:
1533 level = "Standby\n";
1535 case SND_SOC_BIAS_OFF:
1540 level = "Unknown\n";
1544 return simple_read_from_buffer(user_buf, count, ppos, level,
1548 static const struct file_operations dapm_bias_fops = {
1549 .open = dapm_bias_open_file,
1550 .read = dapm_bias_read_file,
1551 .llseek = default_llseek,
1554 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1555 struct dentry *parent)
1559 dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
1561 if (!dapm->debugfs_dapm) {
1563 "Failed to create DAPM debugfs directory\n");
1567 d = debugfs_create_file("bias_level", 0444,
1568 dapm->debugfs_dapm, dapm,
1572 "ASoC: Failed to create bias level debugfs file\n");
1575 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1577 struct snd_soc_dapm_context *dapm = w->dapm;
1580 if (!dapm->debugfs_dapm || !w->name)
1583 d = debugfs_create_file(w->name, 0444,
1584 dapm->debugfs_dapm, w,
1585 &dapm_widget_power_fops);
1587 dev_warn(w->dapm->dev,
1588 "ASoC: Failed to create %s debugfs file\n",
1592 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1594 debugfs_remove_recursive(dapm->debugfs_dapm);
1598 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1599 struct dentry *parent)
1603 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1607 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1613 /* test and update the power status of a mux widget */
1614 static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1615 struct snd_kcontrol *kcontrol, int change,
1616 int mux, struct soc_enum *e)
1618 struct snd_soc_dapm_path *path;
1621 if (widget->id != snd_soc_dapm_mux &&
1622 widget->id != snd_soc_dapm_virt_mux &&
1623 widget->id != snd_soc_dapm_value_mux)
1629 /* find dapm widget path assoc with kcontrol */
1630 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1631 if (path->kcontrol != kcontrol)
1634 if (!path->name || !e->texts[mux])
1638 /* we now need to match the string in the enum to the path */
1639 if (!(strcmp(path->name, e->texts[mux]))) {
1640 path->connect = 1; /* new connection */
1641 dapm_mark_dirty(path->source, "mux connection");
1644 dapm_mark_dirty(path->source,
1645 "mux disconnection");
1646 path->connect = 0; /* old connection must be powered down */
1651 dapm_mark_dirty(widget, "mux change");
1652 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1658 /* test and update the power status of a mixer or switch widget */
1659 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1660 struct snd_kcontrol *kcontrol, int connect)
1662 struct snd_soc_dapm_path *path;
1665 if (widget->id != snd_soc_dapm_mixer &&
1666 widget->id != snd_soc_dapm_mixer_named_ctl &&
1667 widget->id != snd_soc_dapm_switch)
1670 /* find dapm widget path assoc with kcontrol */
1671 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1672 if (path->kcontrol != kcontrol)
1675 /* found, now check type */
1677 path->connect = connect;
1678 dapm_mark_dirty(path->source, "mixer connection");
1682 dapm_mark_dirty(widget, "mixer update");
1683 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1689 /* show dapm widget status in sys fs */
1690 static ssize_t dapm_widget_show(struct device *dev,
1691 struct device_attribute *attr, char *buf)
1693 struct snd_soc_pcm_runtime *rtd =
1694 container_of(dev, struct snd_soc_pcm_runtime, dev);
1695 struct snd_soc_codec *codec =rtd->codec;
1696 struct snd_soc_dapm_widget *w;
1698 char *state = "not set";
1700 list_for_each_entry(w, &codec->card->widgets, list) {
1701 if (w->dapm != &codec->dapm)
1704 /* only display widgets that burnm power */
1706 case snd_soc_dapm_hp:
1707 case snd_soc_dapm_mic:
1708 case snd_soc_dapm_spk:
1709 case snd_soc_dapm_line:
1710 case snd_soc_dapm_micbias:
1711 case snd_soc_dapm_dac:
1712 case snd_soc_dapm_adc:
1713 case snd_soc_dapm_pga:
1714 case snd_soc_dapm_out_drv:
1715 case snd_soc_dapm_mixer:
1716 case snd_soc_dapm_mixer_named_ctl:
1717 case snd_soc_dapm_supply:
1719 count += sprintf(buf + count, "%s: %s\n",
1720 w->name, w->power ? "On":"Off");
1727 switch (codec->dapm.bias_level) {
1728 case SND_SOC_BIAS_ON:
1731 case SND_SOC_BIAS_PREPARE:
1734 case SND_SOC_BIAS_STANDBY:
1737 case SND_SOC_BIAS_OFF:
1741 count += sprintf(buf + count, "PM State: %s\n", state);
1746 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
1748 int snd_soc_dapm_sys_add(struct device *dev)
1750 return device_create_file(dev, &dev_attr_dapm_widget);
1753 static void snd_soc_dapm_sys_remove(struct device *dev)
1755 device_remove_file(dev, &dev_attr_dapm_widget);
1758 /* free all dapm widgets and resources */
1759 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
1761 struct snd_soc_dapm_widget *w, *next_w;
1762 struct snd_soc_dapm_path *p, *next_p;
1764 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
1765 if (w->dapm != dapm)
1769 * remove source and sink paths associated to this widget.
1770 * While removing the path, remove reference to it from both
1771 * source and sink widgets so that path is removed only once.
1773 list_for_each_entry_safe(p, next_p, &w->sources, list_sink) {
1774 list_del(&p->list_sink);
1775 list_del(&p->list_source);
1777 kfree(p->long_name);
1780 list_for_each_entry_safe(p, next_p, &w->sinks, list_source) {
1781 list_del(&p->list_sink);
1782 list_del(&p->list_source);
1784 kfree(p->long_name);
1787 kfree(w->kcontrols);
1793 static struct snd_soc_dapm_widget *dapm_find_widget(
1794 struct snd_soc_dapm_context *dapm, const char *pin,
1795 bool search_other_contexts)
1797 struct snd_soc_dapm_widget *w;
1798 struct snd_soc_dapm_widget *fallback = NULL;
1800 list_for_each_entry(w, &dapm->card->widgets, list) {
1801 if (!strcmp(w->name, pin)) {
1802 if (w->dapm == dapm)
1809 if (search_other_contexts)
1815 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
1816 const char *pin, int status)
1818 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
1821 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
1825 w->connected = status;
1828 dapm_mark_dirty(w, "pin configuration");
1834 * snd_soc_dapm_sync - scan and power dapm paths
1835 * @dapm: DAPM context
1837 * Walks all dapm audio paths and powers widgets according to their
1838 * stream or path usage.
1840 * Returns 0 for success.
1842 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
1844 return dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
1846 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
1848 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
1849 const struct snd_soc_dapm_route *route)
1851 struct snd_soc_dapm_path *path;
1852 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
1853 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
1855 const char *control = route->control;
1857 char prefixed_sink[80];
1858 char prefixed_source[80];
1861 if (dapm->codec && dapm->codec->name_prefix) {
1862 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
1863 dapm->codec->name_prefix, route->sink);
1864 sink = prefixed_sink;
1865 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
1866 dapm->codec->name_prefix, route->source);
1867 source = prefixed_source;
1870 source = route->source;
1874 * find src and dest widgets over all widgets but favor a widget from
1875 * current DAPM context
1877 list_for_each_entry(w, &dapm->card->widgets, list) {
1878 if (!wsink && !(strcmp(w->name, sink))) {
1880 if (w->dapm == dapm)
1884 if (!wsource && !(strcmp(w->name, source))) {
1886 if (w->dapm == dapm)
1890 /* use widget from another DAPM context if not found from this */
1896 if (wsource == NULL || wsink == NULL)
1899 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
1903 path->source = wsource;
1905 path->connected = route->connected;
1906 INIT_LIST_HEAD(&path->list);
1907 INIT_LIST_HEAD(&path->list_source);
1908 INIT_LIST_HEAD(&path->list_sink);
1910 /* check for external widgets */
1911 if (wsink->id == snd_soc_dapm_input) {
1912 if (wsource->id == snd_soc_dapm_micbias ||
1913 wsource->id == snd_soc_dapm_mic ||
1914 wsource->id == snd_soc_dapm_line ||
1915 wsource->id == snd_soc_dapm_output)
1918 if (wsource->id == snd_soc_dapm_output) {
1919 if (wsink->id == snd_soc_dapm_spk ||
1920 wsink->id == snd_soc_dapm_hp ||
1921 wsink->id == snd_soc_dapm_line ||
1922 wsink->id == snd_soc_dapm_input)
1926 /* connect static paths */
1927 if (control == NULL) {
1928 list_add(&path->list, &dapm->card->paths);
1929 list_add(&path->list_sink, &wsink->sources);
1930 list_add(&path->list_source, &wsource->sinks);
1935 /* connect dynamic paths */
1936 switch (wsink->id) {
1937 case snd_soc_dapm_adc:
1938 case snd_soc_dapm_dac:
1939 case snd_soc_dapm_pga:
1940 case snd_soc_dapm_out_drv:
1941 case snd_soc_dapm_input:
1942 case snd_soc_dapm_output:
1943 case snd_soc_dapm_micbias:
1944 case snd_soc_dapm_vmid:
1945 case snd_soc_dapm_pre:
1946 case snd_soc_dapm_post:
1947 case snd_soc_dapm_supply:
1948 case snd_soc_dapm_aif_in:
1949 case snd_soc_dapm_aif_out:
1950 list_add(&path->list, &dapm->card->paths);
1951 list_add(&path->list_sink, &wsink->sources);
1952 list_add(&path->list_source, &wsource->sinks);
1955 case snd_soc_dapm_mux:
1956 case snd_soc_dapm_virt_mux:
1957 case snd_soc_dapm_value_mux:
1958 ret = dapm_connect_mux(dapm, wsource, wsink, path, control,
1959 &wsink->kcontrol_news[0]);
1963 case snd_soc_dapm_switch:
1964 case snd_soc_dapm_mixer:
1965 case snd_soc_dapm_mixer_named_ctl:
1966 ret = dapm_connect_mixer(dapm, wsource, wsink, path, control);
1970 case snd_soc_dapm_hp:
1971 case snd_soc_dapm_mic:
1972 case snd_soc_dapm_line:
1973 case snd_soc_dapm_spk:
1974 list_add(&path->list, &dapm->card->paths);
1975 list_add(&path->list_sink, &wsink->sources);
1976 list_add(&path->list_source, &wsource->sinks);
1983 dev_warn(dapm->dev, "asoc: no dapm match for %s --> %s --> %s\n",
1984 source, control, sink);
1990 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1991 * @dapm: DAPM context
1992 * @route: audio routes
1993 * @num: number of routes
1995 * Connects 2 dapm widgets together via a named audio path. The sink is
1996 * the widget receiving the audio signal, whilst the source is the sender
1997 * of the audio signal.
1999 * Returns 0 for success else error. On error all resources can be freed
2000 * with a call to snd_soc_card_free().
2002 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
2003 const struct snd_soc_dapm_route *route, int num)
2007 for (i = 0; i < num; i++) {
2008 ret = snd_soc_dapm_add_route(dapm, route);
2010 dev_err(dapm->dev, "Failed to add route %s->%s\n",
2011 route->source, route->sink);
2019 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
2021 static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm,
2022 const struct snd_soc_dapm_route *route)
2024 struct snd_soc_dapm_widget *source = dapm_find_widget(dapm,
2027 struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm,
2030 struct snd_soc_dapm_path *path;
2034 dev_err(dapm->dev, "Unable to find source %s for weak route\n",
2040 dev_err(dapm->dev, "Unable to find sink %s for weak route\n",
2045 if (route->control || route->connected)
2046 dev_warn(dapm->dev, "Ignoring control for weak route %s->%s\n",
2047 route->source, route->sink);
2049 list_for_each_entry(path, &source->sinks, list_source) {
2050 if (path->sink == sink) {
2057 dev_err(dapm->dev, "No path found for weak route %s->%s\n",
2058 route->source, route->sink);
2060 dev_warn(dapm->dev, "%d paths found for weak route %s->%s\n",
2061 count, route->source, route->sink);
2067 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
2068 * @dapm: DAPM context
2069 * @route: audio routes
2070 * @num: number of routes
2072 * Mark existing routes matching those specified in the passed array
2073 * as being weak, meaning that they are ignored for the purpose of
2074 * power decisions. The main intended use case is for sidetone paths
2075 * which couple audio between other independent paths if they are both
2076 * active in order to make the combination work better at the user
2077 * level but which aren't intended to be "used".
2079 * Note that CODEC drivers should not use this as sidetone type paths
2080 * can frequently also be used as bypass paths.
2082 int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm,
2083 const struct snd_soc_dapm_route *route, int num)
2088 for (i = 0; i < num; i++) {
2089 err = snd_soc_dapm_weak_route(dapm, route);
2097 EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes);
2100 * snd_soc_dapm_new_widgets - add new dapm widgets
2101 * @dapm: DAPM context
2103 * Checks the codec for any new dapm widgets and creates them if found.
2105 * Returns 0 for success.
2107 int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context *dapm)
2109 struct snd_soc_dapm_widget *w;
2112 list_for_each_entry(w, &dapm->card->widgets, list)
2117 if (w->num_kcontrols) {
2118 w->kcontrols = kzalloc(w->num_kcontrols *
2119 sizeof(struct snd_kcontrol *),
2126 case snd_soc_dapm_switch:
2127 case snd_soc_dapm_mixer:
2128 case snd_soc_dapm_mixer_named_ctl:
2129 w->power_check = dapm_generic_check_power;
2132 case snd_soc_dapm_mux:
2133 case snd_soc_dapm_virt_mux:
2134 case snd_soc_dapm_value_mux:
2135 w->power_check = dapm_generic_check_power;
2138 case snd_soc_dapm_adc:
2139 case snd_soc_dapm_aif_out:
2140 w->power_check = dapm_adc_check_power;
2142 case snd_soc_dapm_dac:
2143 case snd_soc_dapm_aif_in:
2144 w->power_check = dapm_dac_check_power;
2146 case snd_soc_dapm_pga:
2147 case snd_soc_dapm_out_drv:
2148 w->power_check = dapm_generic_check_power;
2151 case snd_soc_dapm_input:
2152 case snd_soc_dapm_output:
2153 case snd_soc_dapm_micbias:
2154 case snd_soc_dapm_spk:
2155 case snd_soc_dapm_hp:
2156 case snd_soc_dapm_mic:
2157 case snd_soc_dapm_line:
2158 w->power_check = dapm_generic_check_power;
2160 case snd_soc_dapm_supply:
2161 w->power_check = dapm_supply_check_power;
2162 case snd_soc_dapm_vmid:
2163 case snd_soc_dapm_pre:
2164 case snd_soc_dapm_post:
2168 if (!w->power_check)
2169 w->power_check = dapm_always_on_check_power;
2171 /* Read the initial power state from the device */
2173 val = soc_widget_read(w, w->reg);
2174 val &= 1 << w->shift;
2184 list_add(&w->dirty, &(w->dapm->card->dapm_dirty));
2185 dapm_debugfs_add_widget(w);
2188 dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
2191 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
2194 * snd_soc_dapm_get_volsw - dapm mixer get callback
2195 * @kcontrol: mixer control
2196 * @ucontrol: control element information
2198 * Callback to get the value of a dapm mixer control.
2200 * Returns 0 for success.
2202 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
2203 struct snd_ctl_elem_value *ucontrol)
2205 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2206 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2207 struct soc_mixer_control *mc =
2208 (struct soc_mixer_control *)kcontrol->private_value;
2209 unsigned int reg = mc->reg;
2210 unsigned int shift = mc->shift;
2211 unsigned int rshift = mc->rshift;
2213 unsigned int invert = mc->invert;
2214 unsigned int mask = (1 << fls(max)) - 1;
2216 ucontrol->value.integer.value[0] =
2217 (snd_soc_read(widget->codec, reg) >> shift) & mask;
2218 if (shift != rshift)
2219 ucontrol->value.integer.value[1] =
2220 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
2222 ucontrol->value.integer.value[0] =
2223 max - ucontrol->value.integer.value[0];
2224 if (shift != rshift)
2225 ucontrol->value.integer.value[1] =
2226 max - ucontrol->value.integer.value[1];
2231 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
2234 * snd_soc_dapm_put_volsw - dapm mixer set callback
2235 * @kcontrol: mixer control
2236 * @ucontrol: control element information
2238 * Callback to set the value of a dapm mixer control.
2240 * Returns 0 for success.
2242 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
2243 struct snd_ctl_elem_value *ucontrol)
2245 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2246 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2247 struct snd_soc_codec *codec = widget->codec;
2248 struct soc_mixer_control *mc =
2249 (struct soc_mixer_control *)kcontrol->private_value;
2250 unsigned int reg = mc->reg;
2251 unsigned int shift = mc->shift;
2253 unsigned int mask = (1 << fls(max)) - 1;
2254 unsigned int invert = mc->invert;
2256 int connect, change;
2257 struct snd_soc_dapm_update update;
2260 val = (ucontrol->value.integer.value[0] & mask);
2264 mask = mask << shift;
2268 /* new connection */
2269 connect = invert ? 0 : 1;
2271 /* old connection must be powered down */
2272 connect = invert ? 1 : 0;
2274 mutex_lock(&codec->mutex);
2276 change = snd_soc_test_bits(widget->codec, reg, mask, val);
2278 for (wi = 0; wi < wlist->num_widgets; wi++) {
2279 widget = wlist->widgets[wi];
2281 widget->value = val;
2283 update.kcontrol = kcontrol;
2284 update.widget = widget;
2288 widget->dapm->update = &update;
2290 dapm_mixer_update_power(widget, kcontrol, connect);
2292 widget->dapm->update = NULL;
2296 mutex_unlock(&codec->mutex);
2299 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
2302 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
2303 * @kcontrol: mixer control
2304 * @ucontrol: control element information
2306 * Callback to get the value of a dapm enumerated double mixer control.
2308 * Returns 0 for success.
2310 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
2311 struct snd_ctl_elem_value *ucontrol)
2313 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2314 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2315 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2316 unsigned int val, bitmask;
2318 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2320 val = snd_soc_read(widget->codec, e->reg);
2321 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
2322 if (e->shift_l != e->shift_r)
2323 ucontrol->value.enumerated.item[1] =
2324 (val >> e->shift_r) & (bitmask - 1);
2328 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
2331 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
2332 * @kcontrol: mixer control
2333 * @ucontrol: control element information
2335 * Callback to set the value of a dapm enumerated double mixer control.
2337 * Returns 0 for success.
2339 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
2340 struct snd_ctl_elem_value *ucontrol)
2342 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2343 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2344 struct snd_soc_codec *codec = widget->codec;
2345 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2346 unsigned int val, mux, change;
2347 unsigned int mask, bitmask;
2348 struct snd_soc_dapm_update update;
2351 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2353 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2355 mux = ucontrol->value.enumerated.item[0];
2356 val = mux << e->shift_l;
2357 mask = (bitmask - 1) << e->shift_l;
2358 if (e->shift_l != e->shift_r) {
2359 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2361 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2362 mask |= (bitmask - 1) << e->shift_r;
2365 mutex_lock(&codec->mutex);
2367 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2369 for (wi = 0; wi < wlist->num_widgets; wi++) {
2370 widget = wlist->widgets[wi];
2372 widget->value = val;
2374 update.kcontrol = kcontrol;
2375 update.widget = widget;
2376 update.reg = e->reg;
2379 widget->dapm->update = &update;
2381 dapm_mux_update_power(widget, kcontrol, change, mux, e);
2383 widget->dapm->update = NULL;
2387 mutex_unlock(&codec->mutex);
2390 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
2393 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
2394 * @kcontrol: mixer control
2395 * @ucontrol: control element information
2397 * Returns 0 for success.
2399 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
2400 struct snd_ctl_elem_value *ucontrol)
2402 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2403 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2405 ucontrol->value.enumerated.item[0] = widget->value;
2409 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt);
2412 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
2413 * @kcontrol: mixer control
2414 * @ucontrol: control element information
2416 * Returns 0 for success.
2418 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
2419 struct snd_ctl_elem_value *ucontrol)
2421 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2422 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2423 struct snd_soc_codec *codec = widget->codec;
2424 struct soc_enum *e =
2425 (struct soc_enum *)kcontrol->private_value;
2430 if (ucontrol->value.enumerated.item[0] >= e->max)
2433 mutex_lock(&codec->mutex);
2435 change = widget->value != ucontrol->value.enumerated.item[0];
2437 for (wi = 0; wi < wlist->num_widgets; wi++) {
2438 widget = wlist->widgets[wi];
2440 widget->value = ucontrol->value.enumerated.item[0];
2442 dapm_mux_update_power(widget, kcontrol, change,
2447 mutex_unlock(&codec->mutex);
2450 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt);
2453 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
2455 * @kcontrol: mixer control
2456 * @ucontrol: control element information
2458 * Callback to get the value of a dapm semi enumerated double mixer control.
2460 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2461 * used for handling bitfield coded enumeration for example.
2463 * Returns 0 for success.
2465 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
2466 struct snd_ctl_elem_value *ucontrol)
2468 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2469 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2470 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2471 unsigned int reg_val, val, mux;
2473 reg_val = snd_soc_read(widget->codec, e->reg);
2474 val = (reg_val >> e->shift_l) & e->mask;
2475 for (mux = 0; mux < e->max; mux++) {
2476 if (val == e->values[mux])
2479 ucontrol->value.enumerated.item[0] = mux;
2480 if (e->shift_l != e->shift_r) {
2481 val = (reg_val >> e->shift_r) & e->mask;
2482 for (mux = 0; mux < e->max; mux++) {
2483 if (val == e->values[mux])
2486 ucontrol->value.enumerated.item[1] = mux;
2491 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
2494 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
2496 * @kcontrol: mixer control
2497 * @ucontrol: control element information
2499 * Callback to set the value of a dapm semi enumerated double mixer control.
2501 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2502 * used for handling bitfield coded enumeration for example.
2504 * Returns 0 for success.
2506 int snd_soc_dapm_put_value_enum_double(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];
2511 struct snd_soc_codec *codec = widget->codec;
2512 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2513 unsigned int val, mux, change;
2515 struct snd_soc_dapm_update update;
2518 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2520 mux = ucontrol->value.enumerated.item[0];
2521 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2522 mask = e->mask << e->shift_l;
2523 if (e->shift_l != e->shift_r) {
2524 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2526 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2527 mask |= e->mask << e->shift_r;
2530 mutex_lock(&codec->mutex);
2532 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2534 for (wi = 0; wi < wlist->num_widgets; wi++) {
2535 widget = wlist->widgets[wi];
2537 widget->value = val;
2539 update.kcontrol = kcontrol;
2540 update.widget = widget;
2541 update.reg = e->reg;
2544 widget->dapm->update = &update;
2546 dapm_mux_update_power(widget, kcontrol, change, mux, e);
2548 widget->dapm->update = NULL;
2552 mutex_unlock(&codec->mutex);
2555 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
2558 * snd_soc_dapm_info_pin_switch - Info for a pin switch
2560 * @kcontrol: mixer control
2561 * @uinfo: control element information
2563 * Callback to provide information about a pin switch control.
2565 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
2566 struct snd_ctl_elem_info *uinfo)
2568 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2570 uinfo->value.integer.min = 0;
2571 uinfo->value.integer.max = 1;
2575 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
2578 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
2580 * @kcontrol: mixer control
2583 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
2584 struct snd_ctl_elem_value *ucontrol)
2586 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2587 const char *pin = (const char *)kcontrol->private_value;
2589 mutex_lock(&codec->mutex);
2591 ucontrol->value.integer.value[0] =
2592 snd_soc_dapm_get_pin_status(&codec->dapm, pin);
2594 mutex_unlock(&codec->mutex);
2598 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
2601 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
2603 * @kcontrol: mixer control
2606 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
2607 struct snd_ctl_elem_value *ucontrol)
2609 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2610 const char *pin = (const char *)kcontrol->private_value;
2612 mutex_lock(&codec->mutex);
2614 if (ucontrol->value.integer.value[0])
2615 snd_soc_dapm_enable_pin(&codec->dapm, pin);
2617 snd_soc_dapm_disable_pin(&codec->dapm, pin);
2619 snd_soc_dapm_sync(&codec->dapm);
2621 mutex_unlock(&codec->mutex);
2625 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
2628 * snd_soc_dapm_new_control - create new dapm control
2629 * @dapm: DAPM context
2630 * @widget: widget template
2632 * Creates a new dapm control based upon the template.
2634 * Returns 0 for success else error.
2636 int snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
2637 const struct snd_soc_dapm_widget *widget)
2639 struct snd_soc_dapm_widget *w;
2642 if ((w = dapm_cnew_widget(widget)) == NULL)
2645 name_len = strlen(widget->name) + 1;
2646 if (dapm->codec && dapm->codec->name_prefix)
2647 name_len += 1 + strlen(dapm->codec->name_prefix);
2648 w->name = kmalloc(name_len, GFP_KERNEL);
2649 if (w->name == NULL) {
2653 if (dapm->codec && dapm->codec->name_prefix)
2654 snprintf(w->name, name_len, "%s %s",
2655 dapm->codec->name_prefix, widget->name);
2657 snprintf(w->name, name_len, "%s", widget->name);
2661 w->codec = dapm->codec;
2662 w->platform = dapm->platform;
2663 INIT_LIST_HEAD(&w->sources);
2664 INIT_LIST_HEAD(&w->sinks);
2665 INIT_LIST_HEAD(&w->list);
2666 INIT_LIST_HEAD(&w->dirty);
2667 list_add(&w->list, &dapm->card->widgets);
2669 /* machine layer set ups unconnected pins and insertions */
2673 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
2676 * snd_soc_dapm_new_controls - create new dapm controls
2677 * @dapm: DAPM context
2678 * @widget: widget array
2679 * @num: number of widgets
2681 * Creates new DAPM controls based upon the templates.
2683 * Returns 0 for success else error.
2685 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
2686 const struct snd_soc_dapm_widget *widget,
2691 for (i = 0; i < num; i++) {
2692 ret = snd_soc_dapm_new_control(dapm, widget);
2695 "ASoC: Failed to create DAPM control %s: %d\n",
2703 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
2705 static void soc_dapm_stream_event(struct snd_soc_dapm_context *dapm,
2706 const char *stream, int event)
2708 struct snd_soc_dapm_widget *w;
2710 list_for_each_entry(w, &dapm->card->widgets, list)
2712 if (!w->sname || w->dapm != dapm)
2714 dev_vdbg(w->dapm->dev, "widget %s\n %s stream %s event %d\n",
2715 w->name, w->sname, stream, event);
2716 if (strstr(w->sname, stream)) {
2717 dapm_mark_dirty(w, "stream event");
2719 case SND_SOC_DAPM_STREAM_START:
2722 case SND_SOC_DAPM_STREAM_STOP:
2725 case SND_SOC_DAPM_STREAM_SUSPEND:
2726 case SND_SOC_DAPM_STREAM_RESUME:
2727 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
2728 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
2734 dapm_power_widgets(dapm, event);
2736 /* do we need to notify any clients that DAPM stream is complete */
2737 if (dapm->stream_event)
2738 dapm->stream_event(dapm, event);
2742 * snd_soc_dapm_stream_event - send a stream event to the dapm core
2743 * @rtd: PCM runtime data
2744 * @stream: stream name
2745 * @event: stream event
2747 * Sends a stream event to the dapm core. The core then makes any
2748 * necessary widget power changes.
2750 * Returns 0 for success else error.
2752 int snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd,
2753 const char *stream, int event)
2755 struct snd_soc_codec *codec = rtd->codec;
2760 mutex_lock(&codec->mutex);
2761 soc_dapm_stream_event(&codec->dapm, stream, event);
2762 mutex_unlock(&codec->mutex);
2767 * snd_soc_dapm_enable_pin - enable pin.
2768 * @dapm: DAPM context
2771 * Enables input/output pin and its parents or children widgets iff there is
2772 * a valid audio route and active audio stream.
2773 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2774 * do any widget power switching.
2776 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
2778 return snd_soc_dapm_set_pin(dapm, pin, 1);
2780 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
2783 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
2784 * @dapm: DAPM context
2787 * Enables input/output pin regardless of any other state. This is
2788 * intended for use with microphone bias supplies used in microphone
2791 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2792 * do any widget power switching.
2794 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
2797 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2800 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
2804 dev_dbg(w->dapm->dev, "dapm: force enable pin %s\n", pin);
2807 dapm_mark_dirty(w, "force enable");
2811 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
2814 * snd_soc_dapm_disable_pin - disable pin.
2815 * @dapm: DAPM context
2818 * Disables input/output pin and its parents or children widgets.
2819 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2820 * do any widget power switching.
2822 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
2825 return snd_soc_dapm_set_pin(dapm, pin, 0);
2827 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
2830 * snd_soc_dapm_nc_pin - permanently disable pin.
2831 * @dapm: DAPM context
2834 * Marks the specified pin as being not connected, disabling it along
2835 * any parent or child widgets. At present this is identical to
2836 * snd_soc_dapm_disable_pin() but in future it will be extended to do
2837 * additional things such as disabling controls which only affect
2838 * paths through the pin.
2840 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2841 * do any widget power switching.
2843 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
2845 return snd_soc_dapm_set_pin(dapm, pin, 0);
2847 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
2850 * snd_soc_dapm_get_pin_status - get audio pin status
2851 * @dapm: DAPM context
2852 * @pin: audio signal pin endpoint (or start point)
2854 * Get audio pin status - connected or disconnected.
2856 * Returns 1 for connected otherwise 0.
2858 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
2861 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2864 return w->connected;
2868 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
2871 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
2872 * @dapm: DAPM context
2873 * @pin: audio signal pin endpoint (or start point)
2875 * Mark the given endpoint or pin as ignoring suspend. When the
2876 * system is disabled a path between two endpoints flagged as ignoring
2877 * suspend will not be disabled. The path must already be enabled via
2878 * normal means at suspend time, it will not be turned on if it was not
2881 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
2884 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
2887 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
2891 w->ignore_suspend = 1;
2895 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
2898 * snd_soc_dapm_free - free dapm resources
2899 * @dapm: DAPM context
2901 * Free all dapm widgets and resources.
2903 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
2905 snd_soc_dapm_sys_remove(dapm->dev);
2906 dapm_debugfs_cleanup(dapm);
2907 dapm_free_widgets(dapm);
2908 list_del(&dapm->list);
2910 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
2912 static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context *dapm)
2914 struct snd_soc_dapm_widget *w;
2915 LIST_HEAD(down_list);
2918 list_for_each_entry(w, &dapm->card->widgets, list) {
2919 if (w->dapm != dapm)
2922 dapm_seq_insert(w, &down_list, false);
2928 /* If there were no widgets to power down we're already in
2932 snd_soc_dapm_set_bias_level(dapm, SND_SOC_BIAS_PREPARE);
2933 dapm_seq_run(dapm, &down_list, 0, false);
2934 snd_soc_dapm_set_bias_level(dapm, SND_SOC_BIAS_STANDBY);
2939 * snd_soc_dapm_shutdown - callback for system shutdown
2941 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
2943 struct snd_soc_codec *codec;
2945 list_for_each_entry(codec, &card->codec_dev_list, list) {
2946 soc_dapm_shutdown_codec(&codec->dapm);
2947 snd_soc_dapm_set_bias_level(&codec->dapm, SND_SOC_BIAS_OFF);
2951 /* Module information */
2952 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2953 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
2954 MODULE_LICENSE("GPL");