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/pm_runtime.h>
43 #include <linux/slab.h>
44 #include <sound/core.h>
45 #include <sound/pcm.h>
46 #include <sound/pcm_params.h>
47 #include <sound/soc.h>
48 #include <sound/initval.h>
50 #include <trace/events/asoc.h>
52 #define DAPM_UPDATE_STAT(widget, val) widget->dapm->card->dapm_stats.val++;
54 /* dapm power sequences - make this per codec in the future */
55 static int dapm_up_seq[] = {
56 [snd_soc_dapm_pre] = 0,
57 [snd_soc_dapm_supply] = 1,
58 [snd_soc_dapm_micbias] = 2,
59 [snd_soc_dapm_aif_in] = 3,
60 [snd_soc_dapm_aif_out] = 3,
61 [snd_soc_dapm_mic] = 4,
62 [snd_soc_dapm_mux] = 5,
63 [snd_soc_dapm_virt_mux] = 5,
64 [snd_soc_dapm_value_mux] = 5,
65 [snd_soc_dapm_dac] = 6,
66 [snd_soc_dapm_mixer] = 7,
67 [snd_soc_dapm_mixer_named_ctl] = 7,
68 [snd_soc_dapm_pga] = 8,
69 [snd_soc_dapm_adc] = 9,
70 [snd_soc_dapm_out_drv] = 10,
71 [snd_soc_dapm_hp] = 10,
72 [snd_soc_dapm_spk] = 10,
73 [snd_soc_dapm_post] = 11,
76 static int dapm_down_seq[] = {
77 [snd_soc_dapm_pre] = 0,
78 [snd_soc_dapm_adc] = 1,
79 [snd_soc_dapm_hp] = 2,
80 [snd_soc_dapm_spk] = 2,
81 [snd_soc_dapm_out_drv] = 2,
82 [snd_soc_dapm_pga] = 4,
83 [snd_soc_dapm_mixer_named_ctl] = 5,
84 [snd_soc_dapm_mixer] = 5,
85 [snd_soc_dapm_dac] = 6,
86 [snd_soc_dapm_mic] = 7,
87 [snd_soc_dapm_micbias] = 8,
88 [snd_soc_dapm_mux] = 9,
89 [snd_soc_dapm_virt_mux] = 9,
90 [snd_soc_dapm_value_mux] = 9,
91 [snd_soc_dapm_aif_in] = 10,
92 [snd_soc_dapm_aif_out] = 10,
93 [snd_soc_dapm_supply] = 11,
94 [snd_soc_dapm_post] = 12,
97 static void pop_wait(u32 pop_time)
100 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
103 static void pop_dbg(struct device *dev, u32 pop_time, const char *fmt, ...)
111 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
116 vsnprintf(buf, PAGE_SIZE, fmt, args);
117 dev_info(dev, "%s", buf);
123 static bool dapm_dirty_widget(struct snd_soc_dapm_widget *w)
125 return !list_empty(&w->dirty);
128 void dapm_mark_dirty(struct snd_soc_dapm_widget *w, const char *reason)
130 if (!dapm_dirty_widget(w)) {
131 dev_vdbg(w->dapm->dev, "Marking %s dirty due to %s\n",
133 list_add_tail(&w->dirty, &w->dapm->card->dapm_dirty);
136 EXPORT_SYMBOL_GPL(dapm_mark_dirty);
138 /* create a new dapm widget */
139 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
140 const struct snd_soc_dapm_widget *_widget)
142 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
145 /* get snd_card from DAPM context */
146 static inline struct snd_card *dapm_get_snd_card(
147 struct snd_soc_dapm_context *dapm)
150 return dapm->codec->card->snd_card;
151 else if (dapm->platform)
152 return dapm->platform->card->snd_card;
160 /* get soc_card from DAPM context */
161 static inline struct snd_soc_card *dapm_get_soc_card(
162 struct snd_soc_dapm_context *dapm)
165 return dapm->codec->card;
166 else if (dapm->platform)
167 return dapm->platform->card;
175 static int soc_widget_read(struct snd_soc_dapm_widget *w, int reg)
178 return snd_soc_read(w->codec, reg);
179 else if (w->platform)
180 return snd_soc_platform_read(w->platform, reg);
182 dev_err(w->dapm->dev, "no valid widget read method\n");
186 static int soc_widget_write(struct snd_soc_dapm_widget *w, int reg, int val)
189 return snd_soc_write(w->codec, reg, val);
190 else if (w->platform)
191 return snd_soc_platform_write(w->platform, reg, val);
193 dev_err(w->dapm->dev, "no valid widget write method\n");
197 static int soc_widget_update_bits(struct snd_soc_dapm_widget *w,
198 unsigned short reg, unsigned int mask, unsigned int value)
201 unsigned int old, new;
204 ret = soc_widget_read(w, reg);
209 new = (old & ~mask) | (value & mask);
212 ret = soc_widget_write(w, reg, new);
221 * snd_soc_dapm_set_bias_level - set the bias level for the system
222 * @dapm: DAPM context
223 * @level: level to configure
225 * Configure the bias (power) levels for the SoC audio device.
227 * Returns 0 for success else error.
229 static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm,
230 enum snd_soc_bias_level level)
232 struct snd_soc_card *card = dapm->card;
235 trace_snd_soc_bias_level_start(card, level);
237 if (card && card->set_bias_level)
238 ret = card->set_bias_level(card, dapm, level);
243 if (dapm->codec->driver->set_bias_level)
244 ret = dapm->codec->driver->set_bias_level(dapm->codec,
247 dapm->bias_level = level;
252 if (card && card->set_bias_level_post)
253 ret = card->set_bias_level_post(card, dapm, level);
255 trace_snd_soc_bias_level_done(card, level);
260 /* set up initial codec paths */
261 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
262 struct snd_soc_dapm_path *p, int i)
265 case snd_soc_dapm_switch:
266 case snd_soc_dapm_mixer:
267 case snd_soc_dapm_mixer_named_ctl: {
269 struct soc_mixer_control *mc = (struct soc_mixer_control *)
270 w->kcontrol_news[i].private_value;
271 unsigned int reg = mc->reg;
272 unsigned int shift = mc->shift;
274 unsigned int mask = (1 << fls(max)) - 1;
275 unsigned int invert = mc->invert;
277 val = soc_widget_read(w, reg);
278 val = (val >> shift) & mask;
280 if ((invert && !val) || (!invert && val))
286 case snd_soc_dapm_mux: {
287 struct soc_enum *e = (struct soc_enum *)
288 w->kcontrol_news[i].private_value;
289 int val, item, bitmask;
291 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
293 val = soc_widget_read(w, e->reg);
294 item = (val >> e->shift_l) & (bitmask - 1);
297 for (i = 0; i < e->max; i++) {
298 if (!(strcmp(p->name, e->texts[i])) && item == i)
303 case snd_soc_dapm_virt_mux: {
304 struct soc_enum *e = (struct soc_enum *)
305 w->kcontrol_news[i].private_value;
308 /* since a virtual mux has no backing registers to
309 * decide which path to connect, it will try to match
310 * with the first enumeration. This is to ensure
311 * that the default mux choice (the first) will be
312 * correctly powered up during initialization.
314 if (!strcmp(p->name, e->texts[0]))
318 case snd_soc_dapm_value_mux: {
319 struct soc_enum *e = (struct soc_enum *)
320 w->kcontrol_news[i].private_value;
323 val = soc_widget_read(w, e->reg);
324 val = (val >> e->shift_l) & e->mask;
325 for (item = 0; item < e->max; item++) {
326 if (val == e->values[item])
331 for (i = 0; i < e->max; i++) {
332 if (!(strcmp(p->name, e->texts[i])) && item == i)
337 /* does not affect routing - always connected */
338 case snd_soc_dapm_pga:
339 case snd_soc_dapm_out_drv:
340 case snd_soc_dapm_output:
341 case snd_soc_dapm_adc:
342 case snd_soc_dapm_input:
343 case snd_soc_dapm_siggen:
344 case snd_soc_dapm_dac:
345 case snd_soc_dapm_micbias:
346 case snd_soc_dapm_vmid:
347 case snd_soc_dapm_supply:
348 case snd_soc_dapm_aif_in:
349 case snd_soc_dapm_aif_out:
350 case snd_soc_dapm_hp:
351 case snd_soc_dapm_mic:
352 case snd_soc_dapm_spk:
353 case snd_soc_dapm_line:
356 /* does affect routing - dynamically connected */
357 case snd_soc_dapm_pre:
358 case snd_soc_dapm_post:
364 /* connect mux widget to its interconnecting audio paths */
365 static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
366 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
367 struct snd_soc_dapm_path *path, const char *control_name,
368 const struct snd_kcontrol_new *kcontrol)
370 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
373 for (i = 0; i < e->max; i++) {
374 if (!(strcmp(control_name, e->texts[i]))) {
375 list_add(&path->list, &dapm->card->paths);
376 list_add(&path->list_sink, &dest->sources);
377 list_add(&path->list_source, &src->sinks);
378 path->name = (char*)e->texts[i];
379 dapm_set_path_status(dest, path, 0);
387 /* connect mixer widget to its interconnecting audio paths */
388 static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
389 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
390 struct snd_soc_dapm_path *path, const char *control_name)
394 /* search for mixer kcontrol */
395 for (i = 0; i < dest->num_kcontrols; i++) {
396 if (!strcmp(control_name, dest->kcontrol_news[i].name)) {
397 list_add(&path->list, &dapm->card->paths);
398 list_add(&path->list_sink, &dest->sources);
399 list_add(&path->list_source, &src->sinks);
400 path->name = dest->kcontrol_news[i].name;
401 dapm_set_path_status(dest, path, i);
408 static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm,
409 struct snd_soc_dapm_widget *kcontrolw,
410 const struct snd_kcontrol_new *kcontrol_new,
411 struct snd_kcontrol **kcontrol)
413 struct snd_soc_dapm_widget *w;
418 list_for_each_entry(w, &dapm->card->widgets, list) {
419 if (w == kcontrolw || w->dapm != kcontrolw->dapm)
421 for (i = 0; i < w->num_kcontrols; i++) {
422 if (&w->kcontrol_news[i] == kcontrol_new) {
424 *kcontrol = w->kcontrols[i];
433 /* create new dapm mixer control */
434 static int dapm_new_mixer(struct snd_soc_dapm_widget *w)
436 struct snd_soc_dapm_context *dapm = w->dapm;
438 size_t name_len, prefix_len;
439 struct snd_soc_dapm_path *path;
440 struct snd_card *card = dapm->card->snd_card;
442 struct snd_soc_dapm_widget_list *wlist;
446 prefix = dapm->codec->name_prefix;
451 prefix_len = strlen(prefix) + 1;
456 for (i = 0; i < w->num_kcontrols; i++) {
459 list_for_each_entry(path, &w->sources, list_sink) {
461 /* mixer/mux paths name must match control name */
462 if (path->name != (char *)w->kcontrol_news[i].name)
465 if (w->kcontrols[i]) {
466 path->kcontrol = w->kcontrols[i];
470 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
471 sizeof(struct snd_soc_dapm_widget *),
472 wlist = kzalloc(wlistsize, GFP_KERNEL);
475 "asoc: can't allocate widget list for %s\n",
479 wlist->num_widgets = 1;
480 wlist->widgets[0] = w;
482 /* add dapm control with long name.
483 * for dapm_mixer this is the concatenation of the
484 * mixer and kcontrol name.
485 * for dapm_mixer_named_ctl this is simply the
488 name_len = strlen(w->kcontrol_news[i].name) + 1;
489 if (w->id != snd_soc_dapm_mixer_named_ctl)
490 name_len += 1 + strlen(w->name);
492 path->long_name = kmalloc(name_len, GFP_KERNEL);
494 if (path->long_name == NULL) {
501 /* The control will get a prefix from
502 * the control creation process but
503 * we're also using the same prefix
504 * for widgets so cut the prefix off
505 * the front of the widget name.
507 snprintf(path->long_name, name_len, "%s %s",
508 w->name + prefix_len,
509 w->kcontrol_news[i].name);
511 case snd_soc_dapm_mixer_named_ctl:
512 snprintf(path->long_name, name_len, "%s",
513 w->kcontrol_news[i].name);
517 path->long_name[name_len - 1] = '\0';
519 path->kcontrol = snd_soc_cnew(&w->kcontrol_news[i],
520 wlist, path->long_name,
522 ret = snd_ctl_add(card, path->kcontrol);
525 "asoc: failed to add dapm kcontrol %s: %d\n",
526 path->long_name, ret);
528 kfree(path->long_name);
529 path->long_name = NULL;
532 w->kcontrols[i] = path->kcontrol;
538 /* create new dapm mux control */
539 static int dapm_new_mux(struct snd_soc_dapm_widget *w)
541 struct snd_soc_dapm_context *dapm = w->dapm;
542 struct snd_soc_dapm_path *path = NULL;
543 struct snd_kcontrol *kcontrol;
544 struct snd_card *card = dapm->card->snd_card;
548 struct snd_soc_dapm_widget_list *wlist;
549 int shared, wlistentries;
553 if (w->num_kcontrols != 1) {
555 "asoc: mux %s has incorrect number of controls\n",
560 shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[0],
563 wlist = kcontrol->private_data;
564 wlistentries = wlist->num_widgets + 1;
569 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
570 wlistentries * sizeof(struct snd_soc_dapm_widget *),
571 wlist = krealloc(wlist, wlistsize, GFP_KERNEL);
574 "asoc: can't allocate widget list for %s\n", w->name);
577 wlist->num_widgets = wlistentries;
578 wlist->widgets[wlistentries - 1] = w;
582 prefix = dapm->codec->name_prefix;
587 name = w->kcontrol_news[0].name;
592 prefix_len = strlen(prefix) + 1;
598 * The control will get a prefix from the control creation
599 * process but we're also using the same prefix for widgets so
600 * cut the prefix off the front of the widget name.
602 kcontrol = snd_soc_cnew(&w->kcontrol_news[0], wlist,
603 name + prefix_len, prefix);
604 ret = snd_ctl_add(card, kcontrol);
606 dev_err(dapm->dev, "failed to add kcontrol %s: %d\n",
613 kcontrol->private_data = wlist;
615 w->kcontrols[0] = kcontrol;
617 list_for_each_entry(path, &w->sources, list_sink)
618 path->kcontrol = kcontrol;
623 /* create new dapm volume control */
624 static int dapm_new_pga(struct snd_soc_dapm_widget *w)
626 if (w->num_kcontrols)
627 dev_err(w->dapm->dev,
628 "asoc: PGA controls not supported: '%s'\n", w->name);
633 /* reset 'walked' bit for each dapm path */
634 static inline void dapm_clear_walk(struct snd_soc_dapm_context *dapm)
636 struct snd_soc_dapm_path *p;
638 list_for_each_entry(p, &dapm->card->paths, list)
642 /* We implement power down on suspend by checking the power state of
643 * the ALSA card - when we are suspending the ALSA state for the card
646 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
648 int level = snd_power_get_state(widget->dapm->card->snd_card);
651 case SNDRV_CTL_POWER_D3hot:
652 case SNDRV_CTL_POWER_D3cold:
653 if (widget->ignore_suspend)
654 dev_dbg(widget->dapm->dev, "%s ignoring suspend\n",
656 return widget->ignore_suspend;
663 * Recursively check for a completed path to an active or physically connected
664 * output widget. Returns number of complete paths.
666 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
668 struct snd_soc_dapm_path *path;
671 if (widget->outputs >= 0)
672 return widget->outputs;
674 DAPM_UPDATE_STAT(widget, path_checks);
676 if (widget->id == snd_soc_dapm_supply)
679 switch (widget->id) {
680 case snd_soc_dapm_adc:
681 case snd_soc_dapm_aif_out:
682 if (widget->active) {
683 widget->outputs = snd_soc_dapm_suspend_check(widget);
684 return widget->outputs;
690 if (widget->connected) {
691 /* connected pin ? */
692 if (widget->id == snd_soc_dapm_output && !widget->ext) {
693 widget->outputs = snd_soc_dapm_suspend_check(widget);
694 return widget->outputs;
697 /* connected jack or spk ? */
698 if (widget->id == snd_soc_dapm_hp ||
699 widget->id == snd_soc_dapm_spk ||
700 (widget->id == snd_soc_dapm_line &&
701 !list_empty(&widget->sources))) {
702 widget->outputs = snd_soc_dapm_suspend_check(widget);
703 return widget->outputs;
707 list_for_each_entry(path, &widget->sinks, list_source) {
708 DAPM_UPDATE_STAT(widget, neighbour_checks);
716 if (path->sink && path->connect) {
718 con += is_connected_output_ep(path->sink);
722 widget->outputs = con;
728 * Recursively check for a completed path to an active or physically connected
729 * input widget. Returns number of complete paths.
731 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
733 struct snd_soc_dapm_path *path;
736 if (widget->inputs >= 0)
737 return widget->inputs;
739 DAPM_UPDATE_STAT(widget, path_checks);
741 if (widget->id == snd_soc_dapm_supply)
744 /* active stream ? */
745 switch (widget->id) {
746 case snd_soc_dapm_dac:
747 case snd_soc_dapm_aif_in:
748 if (widget->active) {
749 widget->inputs = snd_soc_dapm_suspend_check(widget);
750 return widget->inputs;
756 if (widget->connected) {
757 /* connected pin ? */
758 if (widget->id == snd_soc_dapm_input && !widget->ext) {
759 widget->inputs = snd_soc_dapm_suspend_check(widget);
760 return widget->inputs;
763 /* connected VMID/Bias for lower pops */
764 if (widget->id == snd_soc_dapm_vmid) {
765 widget->inputs = snd_soc_dapm_suspend_check(widget);
766 return widget->inputs;
769 /* connected jack ? */
770 if (widget->id == snd_soc_dapm_mic ||
771 (widget->id == snd_soc_dapm_line &&
772 !list_empty(&widget->sinks))) {
773 widget->inputs = snd_soc_dapm_suspend_check(widget);
774 return widget->inputs;
777 /* signal generator */
778 if (widget->id == snd_soc_dapm_siggen) {
779 widget->inputs = snd_soc_dapm_suspend_check(widget);
780 return widget->inputs;
784 list_for_each_entry(path, &widget->sources, list_sink) {
785 DAPM_UPDATE_STAT(widget, neighbour_checks);
793 if (path->source && path->connect) {
795 con += is_connected_input_ep(path->source);
799 widget->inputs = con;
805 * Handler for generic register modifier widget.
807 int dapm_reg_event(struct snd_soc_dapm_widget *w,
808 struct snd_kcontrol *kcontrol, int event)
812 if (SND_SOC_DAPM_EVENT_ON(event))
817 soc_widget_update_bits(w, -(w->reg + 1),
818 w->mask << w->shift, val << w->shift);
822 EXPORT_SYMBOL_GPL(dapm_reg_event);
824 static int dapm_widget_power_check(struct snd_soc_dapm_widget *w)
826 if (w->power_checked)
832 w->new_power = w->power_check(w);
834 w->power_checked = true;
839 /* Generic check to see if a widget should be powered.
841 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
845 DAPM_UPDATE_STAT(w, power_checks);
847 in = is_connected_input_ep(w);
848 dapm_clear_walk(w->dapm);
849 out = is_connected_output_ep(w);
850 dapm_clear_walk(w->dapm);
851 return out != 0 && in != 0;
854 /* Check to see if an ADC has power */
855 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
859 DAPM_UPDATE_STAT(w, power_checks);
862 in = is_connected_input_ep(w);
863 dapm_clear_walk(w->dapm);
866 return dapm_generic_check_power(w);
870 /* Check to see if a DAC has power */
871 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
875 DAPM_UPDATE_STAT(w, power_checks);
878 out = is_connected_output_ep(w);
879 dapm_clear_walk(w->dapm);
882 return dapm_generic_check_power(w);
886 /* Check to see if a power supply is needed */
887 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
889 struct snd_soc_dapm_path *path;
891 DAPM_UPDATE_STAT(w, power_checks);
893 /* Check if one of our outputs is connected */
894 list_for_each_entry(path, &w->sinks, list_source) {
895 DAPM_UPDATE_STAT(w, neighbour_checks);
900 if (path->connected &&
901 !path->connected(path->source, path->sink))
907 if (dapm_widget_power_check(path->sink))
911 dapm_clear_walk(w->dapm);
916 static int dapm_always_on_check_power(struct snd_soc_dapm_widget *w)
921 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
922 struct snd_soc_dapm_widget *b,
930 sort = dapm_down_seq;
932 if (sort[a->id] != sort[b->id])
933 return sort[a->id] - sort[b->id];
934 if (a->subseq != b->subseq) {
936 return a->subseq - b->subseq;
938 return b->subseq - a->subseq;
940 if (a->reg != b->reg)
941 return a->reg - b->reg;
942 if (a->dapm != b->dapm)
943 return (unsigned long)a->dapm - (unsigned long)b->dapm;
948 /* Insert a widget in order into a DAPM power sequence. */
949 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
950 struct list_head *list,
953 struct snd_soc_dapm_widget *w;
955 list_for_each_entry(w, list, power_list)
956 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
957 list_add_tail(&new_widget->power_list, &w->power_list);
961 list_add_tail(&new_widget->power_list, list);
964 static void dapm_seq_check_event(struct snd_soc_dapm_context *dapm,
965 struct snd_soc_dapm_widget *w, int event)
967 struct snd_soc_card *card = dapm->card;
972 case SND_SOC_DAPM_PRE_PMU:
976 case SND_SOC_DAPM_POST_PMU:
977 ev_name = "POST_PMU";
980 case SND_SOC_DAPM_PRE_PMD:
984 case SND_SOC_DAPM_POST_PMD:
985 ev_name = "POST_PMD";
993 if (w->power != power)
996 if (w->event && (w->event_flags & event)) {
997 pop_dbg(dapm->dev, card->pop_time, "pop test : %s %s\n",
999 trace_snd_soc_dapm_widget_event_start(w, event);
1000 ret = w->event(w, NULL, event);
1001 trace_snd_soc_dapm_widget_event_done(w, event);
1003 pr_err("%s: %s event failed: %d\n",
1004 ev_name, w->name, ret);
1008 /* Apply the coalesced changes from a DAPM sequence */
1009 static void dapm_seq_run_coalesced(struct snd_soc_dapm_context *dapm,
1010 struct list_head *pending)
1012 struct snd_soc_card *card = dapm->card;
1013 struct snd_soc_dapm_widget *w;
1015 unsigned int value = 0;
1016 unsigned int mask = 0;
1017 unsigned int cur_mask;
1019 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
1022 list_for_each_entry(w, pending, power_list) {
1023 cur_mask = 1 << w->shift;
1024 BUG_ON(reg != w->reg);
1035 pop_dbg(dapm->dev, card->pop_time,
1036 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
1037 w->name, reg, value, mask);
1039 /* Check for events */
1040 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMU);
1041 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMD);
1045 /* Any widget will do, they should all be updating the
1048 w = list_first_entry(pending, struct snd_soc_dapm_widget,
1051 pop_dbg(dapm->dev, card->pop_time,
1052 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
1053 value, mask, reg, card->pop_time);
1054 pop_wait(card->pop_time);
1055 soc_widget_update_bits(w, reg, mask, value);
1058 list_for_each_entry(w, pending, power_list) {
1059 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMU);
1060 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMD);
1064 /* Apply a DAPM power sequence.
1066 * We walk over a pre-sorted list of widgets to apply power to. In
1067 * order to minimise the number of writes to the device required
1068 * multiple widgets will be updated in a single write where possible.
1069 * Currently anything that requires more than a single write is not
1072 static void dapm_seq_run(struct snd_soc_dapm_context *dapm,
1073 struct list_head *list, int event, bool power_up)
1075 struct snd_soc_dapm_widget *w, *n;
1078 int cur_subseq = -1;
1079 int cur_reg = SND_SOC_NOPM;
1080 struct snd_soc_dapm_context *cur_dapm = NULL;
1087 sort = dapm_down_seq;
1089 list_for_each_entry_safe(w, n, list, power_list) {
1092 /* Do we need to apply any queued changes? */
1093 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
1094 w->dapm != cur_dapm || w->subseq != cur_subseq) {
1095 if (!list_empty(&pending))
1096 dapm_seq_run_coalesced(cur_dapm, &pending);
1098 if (cur_dapm && cur_dapm->seq_notifier) {
1099 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1100 if (sort[i] == cur_sort)
1101 cur_dapm->seq_notifier(cur_dapm,
1106 INIT_LIST_HEAD(&pending);
1108 cur_subseq = INT_MIN;
1109 cur_reg = SND_SOC_NOPM;
1114 case snd_soc_dapm_pre:
1116 list_for_each_entry_safe_continue(w, n, list,
1119 if (event == SND_SOC_DAPM_STREAM_START)
1121 NULL, SND_SOC_DAPM_PRE_PMU);
1122 else if (event == SND_SOC_DAPM_STREAM_STOP)
1124 NULL, SND_SOC_DAPM_PRE_PMD);
1127 case snd_soc_dapm_post:
1129 list_for_each_entry_safe_continue(w, n, list,
1132 if (event == SND_SOC_DAPM_STREAM_START)
1134 NULL, SND_SOC_DAPM_POST_PMU);
1135 else if (event == SND_SOC_DAPM_STREAM_STOP)
1137 NULL, SND_SOC_DAPM_POST_PMD);
1141 /* Queue it up for application */
1142 cur_sort = sort[w->id];
1143 cur_subseq = w->subseq;
1146 list_move(&w->power_list, &pending);
1151 dev_err(w->dapm->dev,
1152 "Failed to apply widget power: %d\n", ret);
1155 if (!list_empty(&pending))
1156 dapm_seq_run_coalesced(cur_dapm, &pending);
1158 if (cur_dapm && cur_dapm->seq_notifier) {
1159 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1160 if (sort[i] == cur_sort)
1161 cur_dapm->seq_notifier(cur_dapm,
1166 static void dapm_widget_update(struct snd_soc_dapm_context *dapm)
1168 struct snd_soc_dapm_update *update = dapm->update;
1169 struct snd_soc_dapm_widget *w;
1178 (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
1179 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
1181 pr_err("%s DAPM pre-event failed: %d\n",
1185 ret = snd_soc_update_bits(w->codec, update->reg, update->mask,
1188 pr_err("%s DAPM update failed: %d\n", w->name, ret);
1191 (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1192 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1194 pr_err("%s DAPM post-event failed: %d\n",
1199 /* Async callback run prior to DAPM sequences - brings to _PREPARE if
1200 * they're changing state.
1202 static void dapm_pre_sequence_async(void *data, async_cookie_t cookie)
1204 struct snd_soc_dapm_context *d = data;
1207 /* If we're off and we're not supposed to be go into STANDBY */
1208 if (d->bias_level == SND_SOC_BIAS_OFF &&
1209 d->target_bias_level != SND_SOC_BIAS_OFF) {
1211 pm_runtime_get_sync(d->dev);
1213 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1216 "Failed to turn on bias: %d\n", ret);
1219 /* Prepare for a STADDBY->ON or ON->STANDBY transition */
1220 if (d->bias_level != d->target_bias_level) {
1221 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);
1224 "Failed to prepare bias: %d\n", ret);
1228 /* Async callback run prior to DAPM sequences - brings to their final
1231 static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
1233 struct snd_soc_dapm_context *d = data;
1236 /* If we just powered the last thing off drop to standby bias */
1237 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1238 (d->target_bias_level == SND_SOC_BIAS_STANDBY ||
1239 d->target_bias_level == SND_SOC_BIAS_OFF)) {
1240 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1242 dev_err(d->dev, "Failed to apply standby bias: %d\n",
1246 /* If we're in standby and can support bias off then do that */
1247 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1248 d->target_bias_level == SND_SOC_BIAS_OFF) {
1249 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);
1251 dev_err(d->dev, "Failed to turn off bias: %d\n", ret);
1254 pm_runtime_put_sync(d->dev);
1257 /* If we just powered up then move to active bias */
1258 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1259 d->target_bias_level == SND_SOC_BIAS_ON) {
1260 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);
1262 dev_err(d->dev, "Failed to apply active bias: %d\n",
1267 static void dapm_widget_set_peer_power(struct snd_soc_dapm_widget *peer,
1268 bool power, bool connect)
1270 /* If a connection is being made or broken then that update
1271 * will have marked the peer dirty, otherwise the widgets are
1272 * not connected and this update has no impact. */
1276 /* If the peer is already in the state we're moving to then we
1277 * won't have an impact on it. */
1278 if (power != peer->power)
1279 dapm_mark_dirty(peer, "peer state change");
1282 static void dapm_widget_set_power(struct snd_soc_dapm_widget *w, bool power,
1283 struct list_head *up_list,
1284 struct list_head *down_list)
1286 struct snd_soc_dapm_path *path;
1288 if (w->power == power)
1291 trace_snd_soc_dapm_widget_power(w, power);
1293 /* If we changed our power state perhaps our neigbours changed
1296 list_for_each_entry(path, &w->sources, list_sink) {
1298 dapm_widget_set_peer_power(path->source, power,
1303 case snd_soc_dapm_supply:
1304 /* Supplies can't affect their outputs, only their inputs */
1307 list_for_each_entry(path, &w->sinks, list_source) {
1309 dapm_widget_set_peer_power(path->sink, power,
1317 dapm_seq_insert(w, up_list, true);
1319 dapm_seq_insert(w, down_list, false);
1324 static void dapm_power_one_widget(struct snd_soc_dapm_widget *w,
1325 struct list_head *up_list,
1326 struct list_head *down_list)
1331 case snd_soc_dapm_pre:
1332 dapm_seq_insert(w, down_list, false);
1334 case snd_soc_dapm_post:
1335 dapm_seq_insert(w, up_list, true);
1339 power = dapm_widget_power_check(w);
1341 dapm_widget_set_power(w, power, up_list, down_list);
1347 * Scan each dapm widget for complete audio path.
1348 * A complete path is a route that has valid endpoints i.e.:-
1350 * o DAC to output pin.
1351 * o Input Pin to ADC.
1352 * o Input pin to Output pin (bypass, sidetone)
1353 * o DAC to ADC (loopback).
1355 static int dapm_power_widgets(struct snd_soc_dapm_context *dapm, int event)
1357 struct snd_soc_card *card = dapm->card;
1358 struct snd_soc_dapm_widget *w;
1359 struct snd_soc_dapm_context *d;
1361 LIST_HEAD(down_list);
1362 LIST_HEAD(async_domain);
1363 enum snd_soc_bias_level bias;
1365 trace_snd_soc_dapm_start(card);
1367 list_for_each_entry(d, &card->dapm_list, list) {
1368 if (d->n_widgets || d->codec == NULL) {
1369 if (d->idle_bias_off)
1370 d->target_bias_level = SND_SOC_BIAS_OFF;
1372 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1376 memset(&card->dapm_stats, 0, sizeof(card->dapm_stats));
1378 list_for_each_entry(w, &card->widgets, list) {
1379 w->power_checked = false;
1384 /* Check which widgets we need to power and store them in
1385 * lists indicating if they should be powered up or down. We
1386 * only check widgets that have been flagged as dirty but note
1387 * that new widgets may be added to the dirty list while we
1390 list_for_each_entry(w, &card->dapm_dirty, dirty) {
1391 dapm_power_one_widget(w, &up_list, &down_list);
1394 list_for_each_entry(w, &card->widgets, list) {
1395 list_del_init(&w->dirty);
1400 /* Supplies and micbiases only bring the
1401 * context up to STANDBY as unless something
1402 * else is active and passing audio they
1403 * generally don't require full power.
1406 case snd_soc_dapm_supply:
1407 case snd_soc_dapm_micbias:
1408 if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
1409 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1412 d->target_bias_level = SND_SOC_BIAS_ON;
1419 /* If there are no DAPM widgets then try to figure out power from the
1422 if (!dapm->n_widgets) {
1424 case SND_SOC_DAPM_STREAM_START:
1425 case SND_SOC_DAPM_STREAM_RESUME:
1426 dapm->target_bias_level = SND_SOC_BIAS_ON;
1428 case SND_SOC_DAPM_STREAM_STOP:
1429 if (dapm->codec->active)
1430 dapm->target_bias_level = SND_SOC_BIAS_ON;
1432 dapm->target_bias_level = SND_SOC_BIAS_STANDBY;
1434 case SND_SOC_DAPM_STREAM_SUSPEND:
1435 dapm->target_bias_level = SND_SOC_BIAS_STANDBY;
1437 case SND_SOC_DAPM_STREAM_NOP:
1438 dapm->target_bias_level = dapm->bias_level;
1445 /* Force all contexts in the card to the same bias state if
1446 * they're not ground referenced.
1448 bias = SND_SOC_BIAS_OFF;
1449 list_for_each_entry(d, &card->dapm_list, list)
1450 if (d->target_bias_level > bias)
1451 bias = d->target_bias_level;
1452 list_for_each_entry(d, &card->dapm_list, list)
1453 if (!d->idle_bias_off)
1454 d->target_bias_level = bias;
1456 trace_snd_soc_dapm_walk_done(card);
1458 /* Run all the bias changes in parallel */
1459 list_for_each_entry(d, &dapm->card->dapm_list, list)
1460 async_schedule_domain(dapm_pre_sequence_async, d,
1462 async_synchronize_full_domain(&async_domain);
1464 /* Power down widgets first; try to avoid amplifying pops. */
1465 dapm_seq_run(dapm, &down_list, event, false);
1467 dapm_widget_update(dapm);
1470 dapm_seq_run(dapm, &up_list, event, true);
1472 /* Run all the bias changes in parallel */
1473 list_for_each_entry(d, &dapm->card->dapm_list, list)
1474 async_schedule_domain(dapm_post_sequence_async, d,
1476 async_synchronize_full_domain(&async_domain);
1478 pop_dbg(dapm->dev, card->pop_time,
1479 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
1480 pop_wait(card->pop_time);
1482 trace_snd_soc_dapm_done(card);
1487 #ifdef CONFIG_DEBUG_FS
1488 static int dapm_widget_power_open_file(struct inode *inode, struct file *file)
1490 file->private_data = inode->i_private;
1494 static ssize_t dapm_widget_power_read_file(struct file *file,
1495 char __user *user_buf,
1496 size_t count, loff_t *ppos)
1498 struct snd_soc_dapm_widget *w = file->private_data;
1502 struct snd_soc_dapm_path *p = NULL;
1504 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1508 in = is_connected_input_ep(w);
1509 dapm_clear_walk(w->dapm);
1510 out = is_connected_output_ep(w);
1511 dapm_clear_walk(w->dapm);
1513 ret = snprintf(buf, PAGE_SIZE, "%s: %s in %d out %d",
1514 w->name, w->power ? "On" : "Off", in, out);
1517 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1518 " - R%d(0x%x) bit %d",
1519 w->reg, w->reg, w->shift);
1521 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1524 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1526 w->active ? "active" : "inactive");
1528 list_for_each_entry(p, &w->sources, list_sink) {
1529 if (p->connected && !p->connected(w, p->sink))
1533 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1534 " in \"%s\" \"%s\"\n",
1535 p->name ? p->name : "static",
1538 list_for_each_entry(p, &w->sinks, list_source) {
1539 if (p->connected && !p->connected(w, p->sink))
1543 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1544 " out \"%s\" \"%s\"\n",
1545 p->name ? p->name : "static",
1549 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1555 static const struct file_operations dapm_widget_power_fops = {
1556 .open = dapm_widget_power_open_file,
1557 .read = dapm_widget_power_read_file,
1558 .llseek = default_llseek,
1561 static int dapm_bias_open_file(struct inode *inode, struct file *file)
1563 file->private_data = inode->i_private;
1567 static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
1568 size_t count, loff_t *ppos)
1570 struct snd_soc_dapm_context *dapm = file->private_data;
1573 switch (dapm->bias_level) {
1574 case SND_SOC_BIAS_ON:
1577 case SND_SOC_BIAS_PREPARE:
1578 level = "Prepare\n";
1580 case SND_SOC_BIAS_STANDBY:
1581 level = "Standby\n";
1583 case SND_SOC_BIAS_OFF:
1588 level = "Unknown\n";
1592 return simple_read_from_buffer(user_buf, count, ppos, level,
1596 static const struct file_operations dapm_bias_fops = {
1597 .open = dapm_bias_open_file,
1598 .read = dapm_bias_read_file,
1599 .llseek = default_llseek,
1602 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1603 struct dentry *parent)
1607 dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
1609 if (!dapm->debugfs_dapm) {
1611 "Failed to create DAPM debugfs directory\n");
1615 d = debugfs_create_file("bias_level", 0444,
1616 dapm->debugfs_dapm, dapm,
1620 "ASoC: Failed to create bias level debugfs file\n");
1623 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1625 struct snd_soc_dapm_context *dapm = w->dapm;
1628 if (!dapm->debugfs_dapm || !w->name)
1631 d = debugfs_create_file(w->name, 0444,
1632 dapm->debugfs_dapm, w,
1633 &dapm_widget_power_fops);
1635 dev_warn(w->dapm->dev,
1636 "ASoC: Failed to create %s debugfs file\n",
1640 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1642 debugfs_remove_recursive(dapm->debugfs_dapm);
1646 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1647 struct dentry *parent)
1651 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1655 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1661 /* test and update the power status of a mux widget */
1662 static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1663 struct snd_kcontrol *kcontrol, int change,
1664 int mux, struct soc_enum *e)
1666 struct snd_soc_dapm_path *path;
1669 if (widget->id != snd_soc_dapm_mux &&
1670 widget->id != snd_soc_dapm_virt_mux &&
1671 widget->id != snd_soc_dapm_value_mux)
1677 /* find dapm widget path assoc with kcontrol */
1678 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1679 if (path->kcontrol != kcontrol)
1682 if (!path->name || !e->texts[mux])
1686 /* we now need to match the string in the enum to the path */
1687 if (!(strcmp(path->name, e->texts[mux]))) {
1688 path->connect = 1; /* new connection */
1689 dapm_mark_dirty(path->source, "mux connection");
1692 dapm_mark_dirty(path->source,
1693 "mux disconnection");
1694 path->connect = 0; /* old connection must be powered down */
1699 dapm_mark_dirty(widget, "mux change");
1700 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1706 /* test and update the power status of a mixer or switch widget */
1707 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1708 struct snd_kcontrol *kcontrol, int connect)
1710 struct snd_soc_dapm_path *path;
1713 if (widget->id != snd_soc_dapm_mixer &&
1714 widget->id != snd_soc_dapm_mixer_named_ctl &&
1715 widget->id != snd_soc_dapm_switch)
1718 /* find dapm widget path assoc with kcontrol */
1719 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1720 if (path->kcontrol != kcontrol)
1723 /* found, now check type */
1725 path->connect = connect;
1726 dapm_mark_dirty(path->source, "mixer connection");
1730 dapm_mark_dirty(widget, "mixer update");
1731 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1737 /* show dapm widget status in sys fs */
1738 static ssize_t dapm_widget_show(struct device *dev,
1739 struct device_attribute *attr, char *buf)
1741 struct snd_soc_pcm_runtime *rtd =
1742 container_of(dev, struct snd_soc_pcm_runtime, dev);
1743 struct snd_soc_codec *codec =rtd->codec;
1744 struct snd_soc_dapm_widget *w;
1746 char *state = "not set";
1748 list_for_each_entry(w, &codec->card->widgets, list) {
1749 if (w->dapm != &codec->dapm)
1752 /* only display widgets that burnm power */
1754 case snd_soc_dapm_hp:
1755 case snd_soc_dapm_mic:
1756 case snd_soc_dapm_spk:
1757 case snd_soc_dapm_line:
1758 case snd_soc_dapm_micbias:
1759 case snd_soc_dapm_dac:
1760 case snd_soc_dapm_adc:
1761 case snd_soc_dapm_pga:
1762 case snd_soc_dapm_out_drv:
1763 case snd_soc_dapm_mixer:
1764 case snd_soc_dapm_mixer_named_ctl:
1765 case snd_soc_dapm_supply:
1767 count += sprintf(buf + count, "%s: %s\n",
1768 w->name, w->power ? "On":"Off");
1775 switch (codec->dapm.bias_level) {
1776 case SND_SOC_BIAS_ON:
1779 case SND_SOC_BIAS_PREPARE:
1782 case SND_SOC_BIAS_STANDBY:
1785 case SND_SOC_BIAS_OFF:
1789 count += sprintf(buf + count, "PM State: %s\n", state);
1794 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
1796 int snd_soc_dapm_sys_add(struct device *dev)
1798 return device_create_file(dev, &dev_attr_dapm_widget);
1801 static void snd_soc_dapm_sys_remove(struct device *dev)
1803 device_remove_file(dev, &dev_attr_dapm_widget);
1806 /* free all dapm widgets and resources */
1807 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
1809 struct snd_soc_dapm_widget *w, *next_w;
1810 struct snd_soc_dapm_path *p, *next_p;
1812 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
1813 if (w->dapm != dapm)
1817 * remove source and sink paths associated to this widget.
1818 * While removing the path, remove reference to it from both
1819 * source and sink widgets so that path is removed only once.
1821 list_for_each_entry_safe(p, next_p, &w->sources, list_sink) {
1822 list_del(&p->list_sink);
1823 list_del(&p->list_source);
1825 kfree(p->long_name);
1828 list_for_each_entry_safe(p, next_p, &w->sinks, list_source) {
1829 list_del(&p->list_sink);
1830 list_del(&p->list_source);
1832 kfree(p->long_name);
1835 kfree(w->kcontrols);
1841 static struct snd_soc_dapm_widget *dapm_find_widget(
1842 struct snd_soc_dapm_context *dapm, const char *pin,
1843 bool search_other_contexts)
1845 struct snd_soc_dapm_widget *w;
1846 struct snd_soc_dapm_widget *fallback = NULL;
1848 list_for_each_entry(w, &dapm->card->widgets, list) {
1849 if (!strcmp(w->name, pin)) {
1850 if (w->dapm == dapm)
1857 if (search_other_contexts)
1863 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
1864 const char *pin, int status)
1866 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
1869 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
1873 w->connected = status;
1876 dapm_mark_dirty(w, "pin configuration");
1882 * snd_soc_dapm_sync - scan and power dapm paths
1883 * @dapm: DAPM context
1885 * Walks all dapm audio paths and powers widgets according to their
1886 * stream or path usage.
1888 * Returns 0 for success.
1890 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
1893 * Suppress early reports (eg, jacks syncing their state) to avoid
1894 * silly DAPM runs during card startup.
1896 if (!dapm->card || !dapm->card->instantiated)
1899 return dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
1901 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
1903 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
1904 const struct snd_soc_dapm_route *route)
1906 struct snd_soc_dapm_path *path;
1907 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
1908 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
1910 const char *control = route->control;
1912 char prefixed_sink[80];
1913 char prefixed_source[80];
1916 if (dapm->codec && dapm->codec->name_prefix) {
1917 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
1918 dapm->codec->name_prefix, route->sink);
1919 sink = prefixed_sink;
1920 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
1921 dapm->codec->name_prefix, route->source);
1922 source = prefixed_source;
1925 source = route->source;
1929 * find src and dest widgets over all widgets but favor a widget from
1930 * current DAPM context
1932 list_for_each_entry(w, &dapm->card->widgets, list) {
1933 if (!wsink && !(strcmp(w->name, sink))) {
1935 if (w->dapm == dapm)
1939 if (!wsource && !(strcmp(w->name, source))) {
1941 if (w->dapm == dapm)
1945 /* use widget from another DAPM context if not found from this */
1951 if (wsource == NULL || wsink == NULL)
1954 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
1958 path->source = wsource;
1960 path->connected = route->connected;
1961 INIT_LIST_HEAD(&path->list);
1962 INIT_LIST_HEAD(&path->list_source);
1963 INIT_LIST_HEAD(&path->list_sink);
1965 /* check for external widgets */
1966 if (wsink->id == snd_soc_dapm_input) {
1967 if (wsource->id == snd_soc_dapm_micbias ||
1968 wsource->id == snd_soc_dapm_mic ||
1969 wsource->id == snd_soc_dapm_line ||
1970 wsource->id == snd_soc_dapm_output)
1973 if (wsource->id == snd_soc_dapm_output) {
1974 if (wsink->id == snd_soc_dapm_spk ||
1975 wsink->id == snd_soc_dapm_hp ||
1976 wsink->id == snd_soc_dapm_line ||
1977 wsink->id == snd_soc_dapm_input)
1981 /* connect static paths */
1982 if (control == NULL) {
1983 list_add(&path->list, &dapm->card->paths);
1984 list_add(&path->list_sink, &wsink->sources);
1985 list_add(&path->list_source, &wsource->sinks);
1990 /* connect dynamic paths */
1991 switch (wsink->id) {
1992 case snd_soc_dapm_adc:
1993 case snd_soc_dapm_dac:
1994 case snd_soc_dapm_pga:
1995 case snd_soc_dapm_out_drv:
1996 case snd_soc_dapm_input:
1997 case snd_soc_dapm_output:
1998 case snd_soc_dapm_siggen:
1999 case snd_soc_dapm_micbias:
2000 case snd_soc_dapm_vmid:
2001 case snd_soc_dapm_pre:
2002 case snd_soc_dapm_post:
2003 case snd_soc_dapm_supply:
2004 case snd_soc_dapm_aif_in:
2005 case snd_soc_dapm_aif_out:
2006 list_add(&path->list, &dapm->card->paths);
2007 list_add(&path->list_sink, &wsink->sources);
2008 list_add(&path->list_source, &wsource->sinks);
2011 case snd_soc_dapm_mux:
2012 case snd_soc_dapm_virt_mux:
2013 case snd_soc_dapm_value_mux:
2014 ret = dapm_connect_mux(dapm, wsource, wsink, path, control,
2015 &wsink->kcontrol_news[0]);
2019 case snd_soc_dapm_switch:
2020 case snd_soc_dapm_mixer:
2021 case snd_soc_dapm_mixer_named_ctl:
2022 ret = dapm_connect_mixer(dapm, wsource, wsink, path, control);
2026 case snd_soc_dapm_hp:
2027 case snd_soc_dapm_mic:
2028 case snd_soc_dapm_line:
2029 case snd_soc_dapm_spk:
2030 list_add(&path->list, &dapm->card->paths);
2031 list_add(&path->list_sink, &wsink->sources);
2032 list_add(&path->list_source, &wsource->sinks);
2039 dev_warn(dapm->dev, "asoc: no dapm match for %s --> %s --> %s\n",
2040 source, control, sink);
2046 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
2047 * @dapm: DAPM context
2048 * @route: audio routes
2049 * @num: number of routes
2051 * Connects 2 dapm widgets together via a named audio path. The sink is
2052 * the widget receiving the audio signal, whilst the source is the sender
2053 * of the audio signal.
2055 * Returns 0 for success else error. On error all resources can be freed
2056 * with a call to snd_soc_card_free().
2058 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
2059 const struct snd_soc_dapm_route *route, int num)
2063 for (i = 0; i < num; i++) {
2064 ret = snd_soc_dapm_add_route(dapm, route);
2066 dev_err(dapm->dev, "Failed to add route %s->%s\n",
2067 route->source, route->sink);
2075 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
2077 static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm,
2078 const struct snd_soc_dapm_route *route)
2080 struct snd_soc_dapm_widget *source = dapm_find_widget(dapm,
2083 struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm,
2086 struct snd_soc_dapm_path *path;
2090 dev_err(dapm->dev, "Unable to find source %s for weak route\n",
2096 dev_err(dapm->dev, "Unable to find sink %s for weak route\n",
2101 if (route->control || route->connected)
2102 dev_warn(dapm->dev, "Ignoring control for weak route %s->%s\n",
2103 route->source, route->sink);
2105 list_for_each_entry(path, &source->sinks, list_source) {
2106 if (path->sink == sink) {
2113 dev_err(dapm->dev, "No path found for weak route %s->%s\n",
2114 route->source, route->sink);
2116 dev_warn(dapm->dev, "%d paths found for weak route %s->%s\n",
2117 count, route->source, route->sink);
2123 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
2124 * @dapm: DAPM context
2125 * @route: audio routes
2126 * @num: number of routes
2128 * Mark existing routes matching those specified in the passed array
2129 * as being weak, meaning that they are ignored for the purpose of
2130 * power decisions. The main intended use case is for sidetone paths
2131 * which couple audio between other independent paths if they are both
2132 * active in order to make the combination work better at the user
2133 * level but which aren't intended to be "used".
2135 * Note that CODEC drivers should not use this as sidetone type paths
2136 * can frequently also be used as bypass paths.
2138 int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm,
2139 const struct snd_soc_dapm_route *route, int num)
2144 for (i = 0; i < num; i++) {
2145 err = snd_soc_dapm_weak_route(dapm, route);
2153 EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes);
2156 * snd_soc_dapm_new_widgets - add new dapm widgets
2157 * @dapm: DAPM context
2159 * Checks the codec for any new dapm widgets and creates them if found.
2161 * Returns 0 for success.
2163 int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context *dapm)
2165 struct snd_soc_dapm_widget *w;
2168 list_for_each_entry(w, &dapm->card->widgets, list)
2173 if (w->num_kcontrols) {
2174 w->kcontrols = kzalloc(w->num_kcontrols *
2175 sizeof(struct snd_kcontrol *),
2182 case snd_soc_dapm_switch:
2183 case snd_soc_dapm_mixer:
2184 case snd_soc_dapm_mixer_named_ctl:
2187 case snd_soc_dapm_mux:
2188 case snd_soc_dapm_virt_mux:
2189 case snd_soc_dapm_value_mux:
2192 case snd_soc_dapm_pga:
2193 case snd_soc_dapm_out_drv:
2200 /* Read the initial power state from the device */
2202 val = soc_widget_read(w, w->reg);
2203 val &= 1 << w->shift;
2213 dapm_mark_dirty(w, "new widget");
2214 dapm_debugfs_add_widget(w);
2217 dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
2220 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
2223 * snd_soc_dapm_get_volsw - dapm mixer get callback
2224 * @kcontrol: mixer control
2225 * @ucontrol: control element information
2227 * Callback to get the value of a dapm mixer control.
2229 * Returns 0 for success.
2231 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
2232 struct snd_ctl_elem_value *ucontrol)
2234 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2235 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2236 struct soc_mixer_control *mc =
2237 (struct soc_mixer_control *)kcontrol->private_value;
2238 unsigned int reg = mc->reg;
2239 unsigned int shift = mc->shift;
2240 unsigned int rshift = mc->rshift;
2242 unsigned int invert = mc->invert;
2243 unsigned int mask = (1 << fls(max)) - 1;
2245 ucontrol->value.integer.value[0] =
2246 (snd_soc_read(widget->codec, reg) >> shift) & mask;
2247 if (shift != rshift)
2248 ucontrol->value.integer.value[1] =
2249 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
2251 ucontrol->value.integer.value[0] =
2252 max - ucontrol->value.integer.value[0];
2253 if (shift != rshift)
2254 ucontrol->value.integer.value[1] =
2255 max - ucontrol->value.integer.value[1];
2260 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
2263 * snd_soc_dapm_put_volsw - dapm mixer set callback
2264 * @kcontrol: mixer control
2265 * @ucontrol: control element information
2267 * Callback to set the value of a dapm mixer control.
2269 * Returns 0 for success.
2271 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
2272 struct snd_ctl_elem_value *ucontrol)
2274 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2275 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2276 struct snd_soc_codec *codec = widget->codec;
2277 struct soc_mixer_control *mc =
2278 (struct soc_mixer_control *)kcontrol->private_value;
2279 unsigned int reg = mc->reg;
2280 unsigned int shift = mc->shift;
2282 unsigned int mask = (1 << fls(max)) - 1;
2283 unsigned int invert = mc->invert;
2285 int connect, change;
2286 struct snd_soc_dapm_update update;
2289 val = (ucontrol->value.integer.value[0] & mask);
2293 mask = mask << shift;
2297 /* new connection */
2298 connect = invert ? 0 : 1;
2300 /* old connection must be powered down */
2301 connect = invert ? 1 : 0;
2303 mutex_lock(&codec->mutex);
2305 change = snd_soc_test_bits(widget->codec, reg, mask, val);
2307 for (wi = 0; wi < wlist->num_widgets; wi++) {
2308 widget = wlist->widgets[wi];
2310 widget->value = val;
2312 update.kcontrol = kcontrol;
2313 update.widget = widget;
2317 widget->dapm->update = &update;
2319 dapm_mixer_update_power(widget, kcontrol, connect);
2321 widget->dapm->update = NULL;
2325 mutex_unlock(&codec->mutex);
2328 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
2331 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
2332 * @kcontrol: mixer control
2333 * @ucontrol: control element information
2335 * Callback to get the value of a dapm enumerated double mixer control.
2337 * Returns 0 for success.
2339 int snd_soc_dapm_get_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 soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2345 unsigned int val, bitmask;
2347 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2349 val = snd_soc_read(widget->codec, e->reg);
2350 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
2351 if (e->shift_l != e->shift_r)
2352 ucontrol->value.enumerated.item[1] =
2353 (val >> e->shift_r) & (bitmask - 1);
2357 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
2360 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
2361 * @kcontrol: mixer control
2362 * @ucontrol: control element information
2364 * Callback to set the value of a dapm enumerated double mixer control.
2366 * Returns 0 for success.
2368 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
2369 struct snd_ctl_elem_value *ucontrol)
2371 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2372 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2373 struct snd_soc_codec *codec = widget->codec;
2374 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2375 unsigned int val, mux, change;
2376 unsigned int mask, bitmask;
2377 struct snd_soc_dapm_update update;
2380 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2382 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2384 mux = ucontrol->value.enumerated.item[0];
2385 val = mux << e->shift_l;
2386 mask = (bitmask - 1) << e->shift_l;
2387 if (e->shift_l != e->shift_r) {
2388 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2390 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2391 mask |= (bitmask - 1) << e->shift_r;
2394 mutex_lock(&codec->mutex);
2396 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2398 for (wi = 0; wi < wlist->num_widgets; wi++) {
2399 widget = wlist->widgets[wi];
2401 widget->value = val;
2403 update.kcontrol = kcontrol;
2404 update.widget = widget;
2405 update.reg = e->reg;
2408 widget->dapm->update = &update;
2410 dapm_mux_update_power(widget, kcontrol, change, mux, e);
2412 widget->dapm->update = NULL;
2416 mutex_unlock(&codec->mutex);
2419 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
2422 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
2423 * @kcontrol: mixer control
2424 * @ucontrol: control element information
2426 * Returns 0 for success.
2428 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
2429 struct snd_ctl_elem_value *ucontrol)
2431 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2432 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2434 ucontrol->value.enumerated.item[0] = widget->value;
2438 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt);
2441 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
2442 * @kcontrol: mixer control
2443 * @ucontrol: control element information
2445 * Returns 0 for success.
2447 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
2448 struct snd_ctl_elem_value *ucontrol)
2450 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2451 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2452 struct snd_soc_codec *codec = widget->codec;
2453 struct soc_enum *e =
2454 (struct soc_enum *)kcontrol->private_value;
2459 if (ucontrol->value.enumerated.item[0] >= e->max)
2462 mutex_lock(&codec->mutex);
2464 change = widget->value != ucontrol->value.enumerated.item[0];
2466 for (wi = 0; wi < wlist->num_widgets; wi++) {
2467 widget = wlist->widgets[wi];
2469 widget->value = ucontrol->value.enumerated.item[0];
2471 dapm_mux_update_power(widget, kcontrol, change,
2476 mutex_unlock(&codec->mutex);
2479 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt);
2482 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
2484 * @kcontrol: mixer control
2485 * @ucontrol: control element information
2487 * Callback to get the value of a dapm semi enumerated double mixer control.
2489 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2490 * used for handling bitfield coded enumeration for example.
2492 * Returns 0 for success.
2494 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
2495 struct snd_ctl_elem_value *ucontrol)
2497 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2498 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2499 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2500 unsigned int reg_val, val, mux;
2502 reg_val = snd_soc_read(widget->codec, e->reg);
2503 val = (reg_val >> e->shift_l) & e->mask;
2504 for (mux = 0; mux < e->max; mux++) {
2505 if (val == e->values[mux])
2508 ucontrol->value.enumerated.item[0] = mux;
2509 if (e->shift_l != e->shift_r) {
2510 val = (reg_val >> e->shift_r) & e->mask;
2511 for (mux = 0; mux < e->max; mux++) {
2512 if (val == e->values[mux])
2515 ucontrol->value.enumerated.item[1] = mux;
2520 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
2523 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
2525 * @kcontrol: mixer control
2526 * @ucontrol: control element information
2528 * Callback to set the value of a dapm semi enumerated double mixer control.
2530 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2531 * used for handling bitfield coded enumeration for example.
2533 * Returns 0 for success.
2535 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
2536 struct snd_ctl_elem_value *ucontrol)
2538 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2539 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2540 struct snd_soc_codec *codec = widget->codec;
2541 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2542 unsigned int val, mux, change;
2544 struct snd_soc_dapm_update update;
2547 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2549 mux = ucontrol->value.enumerated.item[0];
2550 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2551 mask = e->mask << e->shift_l;
2552 if (e->shift_l != e->shift_r) {
2553 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2555 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2556 mask |= e->mask << e->shift_r;
2559 mutex_lock(&codec->mutex);
2561 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2563 for (wi = 0; wi < wlist->num_widgets; wi++) {
2564 widget = wlist->widgets[wi];
2566 widget->value = val;
2568 update.kcontrol = kcontrol;
2569 update.widget = widget;
2570 update.reg = e->reg;
2573 widget->dapm->update = &update;
2575 dapm_mux_update_power(widget, kcontrol, change, mux, e);
2577 widget->dapm->update = NULL;
2581 mutex_unlock(&codec->mutex);
2584 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
2587 * snd_soc_dapm_info_pin_switch - Info for a pin switch
2589 * @kcontrol: mixer control
2590 * @uinfo: control element information
2592 * Callback to provide information about a pin switch control.
2594 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
2595 struct snd_ctl_elem_info *uinfo)
2597 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2599 uinfo->value.integer.min = 0;
2600 uinfo->value.integer.max = 1;
2604 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
2607 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
2609 * @kcontrol: mixer control
2612 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
2613 struct snd_ctl_elem_value *ucontrol)
2615 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2616 const char *pin = (const char *)kcontrol->private_value;
2618 mutex_lock(&codec->mutex);
2620 ucontrol->value.integer.value[0] =
2621 snd_soc_dapm_get_pin_status(&codec->dapm, pin);
2623 mutex_unlock(&codec->mutex);
2627 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
2630 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
2632 * @kcontrol: mixer control
2635 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
2636 struct snd_ctl_elem_value *ucontrol)
2638 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2639 const char *pin = (const char *)kcontrol->private_value;
2641 mutex_lock(&codec->mutex);
2643 if (ucontrol->value.integer.value[0])
2644 snd_soc_dapm_enable_pin(&codec->dapm, pin);
2646 snd_soc_dapm_disable_pin(&codec->dapm, pin);
2648 snd_soc_dapm_sync(&codec->dapm);
2650 mutex_unlock(&codec->mutex);
2654 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
2657 * snd_soc_dapm_new_control - create new dapm control
2658 * @dapm: DAPM context
2659 * @widget: widget template
2661 * Creates a new dapm control based upon the template.
2663 * Returns 0 for success else error.
2665 int snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
2666 const struct snd_soc_dapm_widget *widget)
2668 struct snd_soc_dapm_widget *w;
2671 if ((w = dapm_cnew_widget(widget)) == NULL)
2674 name_len = strlen(widget->name) + 1;
2675 if (dapm->codec && dapm->codec->name_prefix)
2676 name_len += 1 + strlen(dapm->codec->name_prefix);
2677 w->name = kmalloc(name_len, GFP_KERNEL);
2678 if (w->name == NULL) {
2682 if (dapm->codec && dapm->codec->name_prefix)
2683 snprintf(w->name, name_len, "%s %s",
2684 dapm->codec->name_prefix, widget->name);
2686 snprintf(w->name, name_len, "%s", widget->name);
2689 case snd_soc_dapm_switch:
2690 case snd_soc_dapm_mixer:
2691 case snd_soc_dapm_mixer_named_ctl:
2692 w->power_check = dapm_generic_check_power;
2694 case snd_soc_dapm_mux:
2695 case snd_soc_dapm_virt_mux:
2696 case snd_soc_dapm_value_mux:
2697 w->power_check = dapm_generic_check_power;
2699 case snd_soc_dapm_adc:
2700 case snd_soc_dapm_aif_out:
2701 w->power_check = dapm_adc_check_power;
2703 case snd_soc_dapm_dac:
2704 case snd_soc_dapm_aif_in:
2705 w->power_check = dapm_dac_check_power;
2707 case snd_soc_dapm_pga:
2708 case snd_soc_dapm_out_drv:
2709 case snd_soc_dapm_input:
2710 case snd_soc_dapm_output:
2711 case snd_soc_dapm_micbias:
2712 case snd_soc_dapm_spk:
2713 case snd_soc_dapm_hp:
2714 case snd_soc_dapm_mic:
2715 case snd_soc_dapm_line:
2716 w->power_check = dapm_generic_check_power;
2718 case snd_soc_dapm_supply:
2719 w->power_check = dapm_supply_check_power;
2722 w->power_check = dapm_always_on_check_power;
2728 w->codec = dapm->codec;
2729 w->platform = dapm->platform;
2730 INIT_LIST_HEAD(&w->sources);
2731 INIT_LIST_HEAD(&w->sinks);
2732 INIT_LIST_HEAD(&w->list);
2733 INIT_LIST_HEAD(&w->dirty);
2734 list_add(&w->list, &dapm->card->widgets);
2736 /* machine layer set ups unconnected pins and insertions */
2740 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
2743 * snd_soc_dapm_new_controls - create new dapm controls
2744 * @dapm: DAPM context
2745 * @widget: widget array
2746 * @num: number of widgets
2748 * Creates new DAPM controls based upon the templates.
2750 * Returns 0 for success else error.
2752 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
2753 const struct snd_soc_dapm_widget *widget,
2758 for (i = 0; i < num; i++) {
2759 ret = snd_soc_dapm_new_control(dapm, widget);
2762 "ASoC: Failed to create DAPM control %s: %d\n",
2770 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
2772 static void soc_dapm_stream_event(struct snd_soc_dapm_context *dapm,
2773 const char *stream, int event)
2775 struct snd_soc_dapm_widget *w;
2777 list_for_each_entry(w, &dapm->card->widgets, list)
2779 if (!w->sname || w->dapm != dapm)
2781 dev_vdbg(w->dapm->dev, "widget %s\n %s stream %s event %d\n",
2782 w->name, w->sname, stream, event);
2783 if (strstr(w->sname, stream)) {
2784 dapm_mark_dirty(w, "stream event");
2786 case SND_SOC_DAPM_STREAM_START:
2789 case SND_SOC_DAPM_STREAM_STOP:
2792 case SND_SOC_DAPM_STREAM_SUSPEND:
2793 case SND_SOC_DAPM_STREAM_RESUME:
2794 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
2795 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
2801 dapm_power_widgets(dapm, event);
2803 /* do we need to notify any clients that DAPM stream is complete */
2804 if (dapm->stream_event)
2805 dapm->stream_event(dapm, event);
2809 * snd_soc_dapm_stream_event - send a stream event to the dapm core
2810 * @rtd: PCM runtime data
2811 * @stream: stream name
2812 * @event: stream event
2814 * Sends a stream event to the dapm core. The core then makes any
2815 * necessary widget power changes.
2817 * Returns 0 for success else error.
2819 int snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd,
2820 const char *stream, int event)
2822 struct snd_soc_codec *codec = rtd->codec;
2827 mutex_lock(&codec->mutex);
2828 soc_dapm_stream_event(&codec->dapm, stream, event);
2829 mutex_unlock(&codec->mutex);
2834 * snd_soc_dapm_enable_pin - enable pin.
2835 * @dapm: DAPM context
2838 * Enables input/output pin and its parents or children widgets iff there is
2839 * a valid audio route and active audio stream.
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_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
2845 return snd_soc_dapm_set_pin(dapm, pin, 1);
2847 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
2850 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
2851 * @dapm: DAPM context
2854 * Enables input/output pin regardless of any other state. This is
2855 * intended for use with microphone bias supplies used in microphone
2858 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2859 * do any widget power switching.
2861 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
2864 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2867 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
2871 dev_dbg(w->dapm->dev, "dapm: force enable pin %s\n", pin);
2874 dapm_mark_dirty(w, "force enable");
2878 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
2881 * snd_soc_dapm_disable_pin - disable pin.
2882 * @dapm: DAPM context
2885 * Disables input/output pin and its parents or children widgets.
2886 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2887 * do any widget power switching.
2889 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
2892 return snd_soc_dapm_set_pin(dapm, pin, 0);
2894 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
2897 * snd_soc_dapm_nc_pin - permanently disable pin.
2898 * @dapm: DAPM context
2901 * Marks the specified pin as being not connected, disabling it along
2902 * any parent or child widgets. At present this is identical to
2903 * snd_soc_dapm_disable_pin() but in future it will be extended to do
2904 * additional things such as disabling controls which only affect
2905 * paths through the pin.
2907 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2908 * do any widget power switching.
2910 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
2912 return snd_soc_dapm_set_pin(dapm, pin, 0);
2914 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
2917 * snd_soc_dapm_get_pin_status - get audio pin status
2918 * @dapm: DAPM context
2919 * @pin: audio signal pin endpoint (or start point)
2921 * Get audio pin status - connected or disconnected.
2923 * Returns 1 for connected otherwise 0.
2925 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
2928 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2931 return w->connected;
2935 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
2938 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
2939 * @dapm: DAPM context
2940 * @pin: audio signal pin endpoint (or start point)
2942 * Mark the given endpoint or pin as ignoring suspend. When the
2943 * system is disabled a path between two endpoints flagged as ignoring
2944 * suspend will not be disabled. The path must already be enabled via
2945 * normal means at suspend time, it will not be turned on if it was not
2948 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
2951 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
2954 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
2958 w->ignore_suspend = 1;
2962 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
2964 static bool snd_soc_dapm_widget_in_card_paths(struct snd_soc_card *card,
2965 struct snd_soc_dapm_widget *w)
2967 struct snd_soc_dapm_path *p;
2969 list_for_each_entry(p, &card->paths, list) {
2970 if ((p->source == w) || (p->sink == w)) {
2972 "... Path %s(id:%d dapm:%p) - %s(id:%d dapm:%p)\n",
2973 p->source->name, p->source->id, p->source->dapm,
2974 p->sink->name, p->sink->id, p->sink->dapm);
2976 /* Connected to something other than the codec */
2977 if (p->source->dapm != p->sink->dapm)
2980 * Loopback connection from codec external pin to
2981 * codec external pin
2983 if (p->sink->id == snd_soc_dapm_input) {
2984 switch (p->source->id) {
2985 case snd_soc_dapm_output:
2986 case snd_soc_dapm_micbias:
2999 * snd_soc_dapm_auto_nc_codec_pins - call snd_soc_dapm_nc_pin for unused pins
3000 * @codec: The codec whose pins should be processed
3002 * Automatically call snd_soc_dapm_nc_pin() for any external pins in the codec
3003 * which are unused. Pins are used if they are connected externally to the
3004 * codec, whether that be to some other device, or a loop-back connection to
3007 void snd_soc_dapm_auto_nc_codec_pins(struct snd_soc_codec *codec)
3009 struct snd_soc_card *card = codec->card;
3010 struct snd_soc_dapm_context *dapm = &codec->dapm;
3011 struct snd_soc_dapm_widget *w;
3013 dev_dbg(codec->dev, "Auto NC: DAPMs: card:%p codec:%p\n",
3014 &card->dapm, &codec->dapm);
3016 list_for_each_entry(w, &card->widgets, list) {
3017 if (w->dapm != dapm)
3020 case snd_soc_dapm_input:
3021 case snd_soc_dapm_output:
3022 case snd_soc_dapm_micbias:
3023 dev_dbg(codec->dev, "Auto NC: Checking widget %s\n",
3025 if (!snd_soc_dapm_widget_in_card_paths(card, w)) {
3027 "... Not in map; disabling\n");
3028 snd_soc_dapm_nc_pin(dapm, w->name);
3038 * snd_soc_dapm_free - free dapm resources
3039 * @dapm: DAPM context
3041 * Free all dapm widgets and resources.
3043 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
3045 snd_soc_dapm_sys_remove(dapm->dev);
3046 dapm_debugfs_cleanup(dapm);
3047 dapm_free_widgets(dapm);
3048 list_del(&dapm->list);
3050 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
3052 static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context *dapm)
3054 struct snd_soc_dapm_widget *w;
3055 LIST_HEAD(down_list);
3058 list_for_each_entry(w, &dapm->card->widgets, list) {
3059 if (w->dapm != dapm)
3062 dapm_seq_insert(w, &down_list, false);
3068 /* If there were no widgets to power down we're already in
3072 snd_soc_dapm_set_bias_level(dapm, SND_SOC_BIAS_PREPARE);
3073 dapm_seq_run(dapm, &down_list, 0, false);
3074 snd_soc_dapm_set_bias_level(dapm, SND_SOC_BIAS_STANDBY);
3079 * snd_soc_dapm_shutdown - callback for system shutdown
3081 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
3083 struct snd_soc_codec *codec;
3085 list_for_each_entry(codec, &card->codec_dev_list, list) {
3086 soc_dapm_shutdown_codec(&codec->dapm);
3087 snd_soc_dapm_set_bias_level(&codec->dapm, SND_SOC_BIAS_OFF);
3091 /* Module information */
3092 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3093 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
3094 MODULE_LICENSE("GPL");