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/delay.h>
37 #include <linux/bitops.h>
38 #include <linux/platform_device.h>
39 #include <linux/jiffies.h>
40 #include <sound/core.h>
41 #include <sound/pcm.h>
42 #include <sound/pcm_params.h>
43 #include <sound/soc-dapm.h>
44 #include <sound/initval.h>
48 #define dump_dapm(codec, action) dbg_dump_dapm(codec, action)
50 #define dump_dapm(codec, action)
53 /* dapm power sequences - make this per codec in the future */
54 static int dapm_up_seq[] = {
55 snd_soc_dapm_pre, snd_soc_dapm_micbias, snd_soc_dapm_mic,
56 snd_soc_dapm_mux, snd_soc_dapm_value_mux, snd_soc_dapm_dac,
57 snd_soc_dapm_mixer, snd_soc_dapm_mixer_named_ctl, snd_soc_dapm_pga,
58 snd_soc_dapm_adc, snd_soc_dapm_hp, snd_soc_dapm_spk, snd_soc_dapm_post
61 static int dapm_down_seq[] = {
62 snd_soc_dapm_pre, snd_soc_dapm_adc, snd_soc_dapm_hp, snd_soc_dapm_spk,
63 snd_soc_dapm_pga, snd_soc_dapm_mixer_named_ctl, snd_soc_dapm_mixer,
64 snd_soc_dapm_dac, snd_soc_dapm_mic, snd_soc_dapm_micbias,
65 snd_soc_dapm_mux, snd_soc_dapm_value_mux, snd_soc_dapm_post
68 static int dapm_status = 1;
69 module_param(dapm_status, int, 0);
70 MODULE_PARM_DESC(dapm_status, "enable DPM sysfs entries");
72 static void pop_wait(u32 pop_time)
75 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
78 static void pop_dbg(u32 pop_time, const char *fmt, ...)
92 /* create a new dapm widget */
93 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
94 const struct snd_soc_dapm_widget *_widget)
96 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
99 /* set up initial codec paths */
100 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
101 struct snd_soc_dapm_path *p, int i)
104 case snd_soc_dapm_switch:
105 case snd_soc_dapm_mixer:
106 case snd_soc_dapm_mixer_named_ctl: {
108 struct soc_mixer_control *mc = (struct soc_mixer_control *)
109 w->kcontrols[i].private_value;
110 unsigned int reg = mc->reg;
111 unsigned int shift = mc->shift;
113 unsigned int mask = (1 << fls(max)) - 1;
114 unsigned int invert = mc->invert;
116 val = snd_soc_read(w->codec, reg);
117 val = (val >> shift) & mask;
119 if ((invert && !val) || (!invert && val))
125 case snd_soc_dapm_mux: {
126 struct soc_enum *e = (struct soc_enum *)w->kcontrols[i].private_value;
127 int val, item, bitmask;
129 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
131 val = snd_soc_read(w->codec, e->reg);
132 item = (val >> e->shift_l) & (bitmask - 1);
135 for (i = 0; i < e->max; i++) {
136 if (!(strcmp(p->name, e->texts[i])) && item == i)
141 case snd_soc_dapm_value_mux: {
142 struct soc_enum *e = (struct soc_enum *)
143 w->kcontrols[i].private_value;
146 val = snd_soc_read(w->codec, e->reg);
147 val = (val >> e->shift_l) & e->mask;
148 for (item = 0; item < e->max; item++) {
149 if (val == e->values[item])
154 for (i = 0; i < e->max; i++) {
155 if (!(strcmp(p->name, e->texts[i])) && item == i)
160 /* does not effect routing - always connected */
161 case snd_soc_dapm_pga:
162 case snd_soc_dapm_output:
163 case snd_soc_dapm_adc:
164 case snd_soc_dapm_input:
165 case snd_soc_dapm_dac:
166 case snd_soc_dapm_micbias:
167 case snd_soc_dapm_vmid:
170 /* does effect routing - dynamically connected */
171 case snd_soc_dapm_hp:
172 case snd_soc_dapm_mic:
173 case snd_soc_dapm_spk:
174 case snd_soc_dapm_line:
175 case snd_soc_dapm_pre:
176 case snd_soc_dapm_post:
182 /* connect mux widget to it's interconnecting audio paths */
183 static int dapm_connect_mux(struct snd_soc_codec *codec,
184 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
185 struct snd_soc_dapm_path *path, const char *control_name,
186 const struct snd_kcontrol_new *kcontrol)
188 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
191 for (i = 0; i < e->max; i++) {
192 if (!(strcmp(control_name, e->texts[i]))) {
193 list_add(&path->list, &codec->dapm_paths);
194 list_add(&path->list_sink, &dest->sources);
195 list_add(&path->list_source, &src->sinks);
196 path->name = (char*)e->texts[i];
197 dapm_set_path_status(dest, path, 0);
205 /* connect mixer widget to it's interconnecting audio paths */
206 static int dapm_connect_mixer(struct snd_soc_codec *codec,
207 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
208 struct snd_soc_dapm_path *path, const char *control_name)
212 /* search for mixer kcontrol */
213 for (i = 0; i < dest->num_kcontrols; i++) {
214 if (!strcmp(control_name, dest->kcontrols[i].name)) {
215 list_add(&path->list, &codec->dapm_paths);
216 list_add(&path->list_sink, &dest->sources);
217 list_add(&path->list_source, &src->sinks);
218 path->name = dest->kcontrols[i].name;
219 dapm_set_path_status(dest, path, i);
226 /* update dapm codec register bits */
227 static int dapm_update_bits(struct snd_soc_dapm_widget *widget)
230 unsigned short old, new;
231 struct snd_soc_codec *codec = widget->codec;
233 /* check for valid widgets */
234 if (widget->reg < 0 || widget->id == snd_soc_dapm_input ||
235 widget->id == snd_soc_dapm_output ||
236 widget->id == snd_soc_dapm_hp ||
237 widget->id == snd_soc_dapm_mic ||
238 widget->id == snd_soc_dapm_line ||
239 widget->id == snd_soc_dapm_spk)
242 power = widget->power;
244 power = (power ? 0:1);
246 old = snd_soc_read(codec, widget->reg);
247 new = (old & ~(0x1 << widget->shift)) | (power << widget->shift);
251 pop_dbg(codec->pop_time, "pop test %s : %s in %d ms\n",
252 widget->name, widget->power ? "on" : "off",
254 snd_soc_write(codec, widget->reg, new);
255 pop_wait(codec->pop_time);
257 pr_debug("reg %x old %x new %x change %d\n", widget->reg,
262 /* ramps the volume up or down to minimise pops before or after a
263 * DAPM power event */
264 static int dapm_set_pga(struct snd_soc_dapm_widget *widget, int power)
266 const struct snd_kcontrol_new *k = widget->kcontrols;
268 if (widget->muted && !power)
270 if (!widget->muted && power)
273 if (widget->num_kcontrols && k) {
274 struct soc_mixer_control *mc =
275 (struct soc_mixer_control *)k->private_value;
276 unsigned int reg = mc->reg;
277 unsigned int shift = mc->shift;
279 unsigned int mask = (1 << fls(max)) - 1;
280 unsigned int invert = mc->invert;
284 /* power up has happended, increase volume to last level */
286 for (i = max; i > widget->saved_value; i--)
287 snd_soc_update_bits(widget->codec, reg, mask, i);
289 for (i = 0; i < widget->saved_value; i++)
290 snd_soc_update_bits(widget->codec, reg, mask, i);
294 /* power down is about to occur, decrease volume to mute */
295 int val = snd_soc_read(widget->codec, reg);
296 int i = widget->saved_value = (val >> shift) & mask;
298 for (; i < mask; i++)
299 snd_soc_update_bits(widget->codec, reg, mask, i);
302 snd_soc_update_bits(widget->codec, reg, mask, i);
310 /* create new dapm mixer control */
311 static int dapm_new_mixer(struct snd_soc_codec *codec,
312 struct snd_soc_dapm_widget *w)
316 struct snd_soc_dapm_path *path;
319 for (i = 0; i < w->num_kcontrols; i++) {
322 list_for_each_entry(path, &w->sources, list_sink) {
324 /* mixer/mux paths name must match control name */
325 if (path->name != (char*)w->kcontrols[i].name)
328 /* add dapm control with long name.
329 * for dapm_mixer this is the concatenation of the
330 * mixer and kcontrol name.
331 * for dapm_mixer_named_ctl this is simply the
334 name_len = strlen(w->kcontrols[i].name) + 1;
335 if (w->id != snd_soc_dapm_mixer_named_ctl)
336 name_len += 1 + strlen(w->name);
338 path->long_name = kmalloc(name_len, GFP_KERNEL);
340 if (path->long_name == NULL)
345 snprintf(path->long_name, name_len, "%s %s",
346 w->name, w->kcontrols[i].name);
348 case snd_soc_dapm_mixer_named_ctl:
349 snprintf(path->long_name, name_len, "%s",
350 w->kcontrols[i].name);
354 path->long_name[name_len - 1] = '\0';
356 path->kcontrol = snd_soc_cnew(&w->kcontrols[i], w,
358 ret = snd_ctl_add(codec->card, path->kcontrol);
360 printk(KERN_ERR "asoc: failed to add dapm kcontrol %s: %d\n",
363 kfree(path->long_name);
364 path->long_name = NULL;
372 /* create new dapm mux control */
373 static int dapm_new_mux(struct snd_soc_codec *codec,
374 struct snd_soc_dapm_widget *w)
376 struct snd_soc_dapm_path *path = NULL;
377 struct snd_kcontrol *kcontrol;
380 if (!w->num_kcontrols) {
381 printk(KERN_ERR "asoc: mux %s has no controls\n", w->name);
385 kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name);
386 ret = snd_ctl_add(codec->card, kcontrol);
390 list_for_each_entry(path, &w->sources, list_sink)
391 path->kcontrol = kcontrol;
396 printk(KERN_ERR "asoc: failed to add kcontrol %s\n", w->name);
400 /* create new dapm volume control */
401 static int dapm_new_pga(struct snd_soc_codec *codec,
402 struct snd_soc_dapm_widget *w)
404 struct snd_kcontrol *kcontrol;
407 if (!w->num_kcontrols)
410 kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name);
411 ret = snd_ctl_add(codec->card, kcontrol);
413 printk(KERN_ERR "asoc: failed to add kcontrol %s\n", w->name);
420 /* reset 'walked' bit for each dapm path */
421 static inline void dapm_clear_walk(struct snd_soc_codec *codec)
423 struct snd_soc_dapm_path *p;
425 list_for_each_entry(p, &codec->dapm_paths, list)
430 * Recursively check for a completed path to an active or physically connected
431 * output widget. Returns number of complete paths.
433 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
435 struct snd_soc_dapm_path *path;
438 if (widget->id == snd_soc_dapm_adc && widget->active)
441 if (widget->connected) {
442 /* connected pin ? */
443 if (widget->id == snd_soc_dapm_output && !widget->ext)
446 /* connected jack or spk ? */
447 if (widget->id == snd_soc_dapm_hp || widget->id == snd_soc_dapm_spk ||
448 widget->id == snd_soc_dapm_line)
452 list_for_each_entry(path, &widget->sinks, list_source) {
456 if (path->sink && path->connect) {
458 con += is_connected_output_ep(path->sink);
466 * Recursively check for a completed path to an active or physically connected
467 * input widget. Returns number of complete paths.
469 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
471 struct snd_soc_dapm_path *path;
474 /* active stream ? */
475 if (widget->id == snd_soc_dapm_dac && widget->active)
478 if (widget->connected) {
479 /* connected pin ? */
480 if (widget->id == snd_soc_dapm_input && !widget->ext)
483 /* connected VMID/Bias for lower pops */
484 if (widget->id == snd_soc_dapm_vmid)
487 /* connected jack ? */
488 if (widget->id == snd_soc_dapm_mic || widget->id == snd_soc_dapm_line)
492 list_for_each_entry(path, &widget->sources, list_sink) {
496 if (path->source && path->connect) {
498 con += is_connected_input_ep(path->source);
506 * Handler for generic register modifier widget.
508 int dapm_reg_event(struct snd_soc_dapm_widget *w,
509 struct snd_kcontrol *kcontrol, int event)
513 if (SND_SOC_DAPM_EVENT_ON(event))
518 snd_soc_update_bits(w->codec, -(w->reg + 1),
519 w->mask << w->shift, val << w->shift);
523 EXPORT_SYMBOL_GPL(dapm_reg_event);
525 /* Standard power change method, used to apply power changes to most
528 static int dapm_generic_apply_power(struct snd_soc_dapm_widget *w)
532 /* call any power change event handlers */
534 pr_debug("power %s event for %s flags %x\n",
535 w->power ? "on" : "off",
536 w->name, w->event_flags);
538 /* power up pre event */
539 if (w->power && w->event &&
540 (w->event_flags & SND_SOC_DAPM_PRE_PMU)) {
541 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMU);
546 /* power down pre event */
547 if (!w->power && w->event &&
548 (w->event_flags & SND_SOC_DAPM_PRE_PMD)) {
549 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMD);
554 /* Lower PGA volume to reduce pops */
555 if (w->id == snd_soc_dapm_pga && !w->power)
556 dapm_set_pga(w, w->power);
560 /* Raise PGA volume to reduce pops */
561 if (w->id == snd_soc_dapm_pga && w->power)
562 dapm_set_pga(w, w->power);
564 /* power up post event */
565 if (w->power && w->event &&
566 (w->event_flags & SND_SOC_DAPM_POST_PMU)) {
568 NULL, SND_SOC_DAPM_POST_PMU);
573 /* power down post event */
574 if (!w->power && w->event &&
575 (w->event_flags & SND_SOC_DAPM_POST_PMD)) {
576 ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMD);
584 /* Generic check to see if a widget should be powered.
586 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
590 in = is_connected_input_ep(w);
591 dapm_clear_walk(w->codec);
592 out = is_connected_output_ep(w);
593 dapm_clear_walk(w->codec);
594 return out != 0 && in != 0;
598 * Scan a single DAPM widget for a complete audio path and update the
599 * power status appropriately.
601 static int dapm_power_widget(struct snd_soc_codec *codec, int event,
602 struct snd_soc_dapm_widget *w)
604 int in, out, power_change, power, ret;
606 /* vmid - no action */
607 if (w->id == snd_soc_dapm_vmid)
611 if (w->id == snd_soc_dapm_adc && w->active) {
612 in = is_connected_input_ep(w);
613 dapm_clear_walk(w->codec);
614 power = (in != 0) ? 1 : 0;
615 if (power == w->power)
618 return dapm_generic_apply_power(w);
622 if (w->id == snd_soc_dapm_dac && w->active) {
623 out = is_connected_output_ep(w);
624 dapm_clear_walk(w->codec);
625 power = (out != 0) ? 1 : 0;
626 if (power == w->power)
629 return dapm_generic_apply_power(w);
632 /* pre and post event widgets */
633 if (w->id == snd_soc_dapm_pre) {
637 if (event == SND_SOC_DAPM_STREAM_START) {
639 NULL, SND_SOC_DAPM_PRE_PMU);
642 } else if (event == SND_SOC_DAPM_STREAM_STOP) {
644 NULL, SND_SOC_DAPM_PRE_PMD);
650 if (w->id == snd_soc_dapm_post) {
654 if (event == SND_SOC_DAPM_STREAM_START) {
656 NULL, SND_SOC_DAPM_POST_PMU);
659 } else if (event == SND_SOC_DAPM_STREAM_STOP) {
661 NULL, SND_SOC_DAPM_POST_PMD);
668 /* all other widgets */
669 power = dapm_generic_check_power(w);
670 power_change = (w->power == power) ? 0 : 1;
676 return dapm_generic_apply_power(w);
680 * Scan each dapm widget for complete audio path.
681 * A complete path is a route that has valid endpoints i.e.:-
683 * o DAC to output pin.
684 * o Input Pin to ADC.
685 * o Input pin to Output pin (bypass, sidetone)
686 * o DAC to ADC (loopback).
688 static int dapm_power_widgets(struct snd_soc_codec *codec, int event)
690 struct snd_soc_dapm_widget *w;
691 int i, c = 1, *seq = NULL, ret = 0;
693 /* do we have a sequenced stream event */
694 if (event == SND_SOC_DAPM_STREAM_START) {
695 c = ARRAY_SIZE(dapm_up_seq);
697 } else if (event == SND_SOC_DAPM_STREAM_STOP) {
698 c = ARRAY_SIZE(dapm_down_seq);
702 for (i = 0; i < c; i++) {
703 list_for_each_entry(w, &codec->dapm_widgets, list) {
705 /* is widget in stream order */
706 if (seq && seq[i] && w->id != seq[i])
709 ret = dapm_power_widget(codec, event, w);
719 static void dbg_dump_dapm(struct snd_soc_codec* codec, const char *action)
721 struct snd_soc_dapm_widget *w;
722 struct snd_soc_dapm_path *p = NULL;
725 printk("DAPM %s %s\n", codec->name, action);
727 list_for_each_entry(w, &codec->dapm_widgets, list) {
729 /* only display widgets that effect routing */
731 case snd_soc_dapm_pre:
732 case snd_soc_dapm_post:
733 case snd_soc_dapm_vmid:
735 case snd_soc_dapm_mux:
736 case snd_soc_dapm_value_mux:
737 case snd_soc_dapm_output:
738 case snd_soc_dapm_input:
739 case snd_soc_dapm_switch:
740 case snd_soc_dapm_hp:
741 case snd_soc_dapm_mic:
742 case snd_soc_dapm_spk:
743 case snd_soc_dapm_line:
744 case snd_soc_dapm_micbias:
745 case snd_soc_dapm_dac:
746 case snd_soc_dapm_adc:
747 case snd_soc_dapm_pga:
748 case snd_soc_dapm_mixer:
749 case snd_soc_dapm_mixer_named_ctl:
751 in = is_connected_input_ep(w);
752 dapm_clear_walk(w->codec);
753 out = is_connected_output_ep(w);
754 dapm_clear_walk(w->codec);
755 printk("%s: %s in %d out %d\n", w->name,
756 w->power ? "On":"Off",in, out);
758 list_for_each_entry(p, &w->sources, list_sink) {
760 printk(" in %s %s\n", p->name ? p->name : "static",
763 list_for_each_entry(p, &w->sinks, list_source) {
765 printk(" out %s %s\n", p->name ? p->name : "static",
775 /* test and update the power status of a mux widget */
776 static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
777 struct snd_kcontrol *kcontrol, int mask,
778 int mux, int val, struct soc_enum *e)
780 struct snd_soc_dapm_path *path;
783 if (widget->id != snd_soc_dapm_mux &&
784 widget->id != snd_soc_dapm_value_mux)
787 if (!snd_soc_test_bits(widget->codec, e->reg, mask, val))
790 /* find dapm widget path assoc with kcontrol */
791 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
792 if (path->kcontrol != kcontrol)
795 if (!path->name || !e->texts[mux])
799 /* we now need to match the string in the enum to the path */
800 if (!(strcmp(path->name, e->texts[mux])))
801 path->connect = 1; /* new connection */
803 path->connect = 0; /* old connection must be powered down */
807 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
808 dump_dapm(widget->codec, "mux power update");
814 /* test and update the power status of a mixer or switch widget */
815 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
816 struct snd_kcontrol *kcontrol, int reg,
817 int val_mask, int val, int invert)
819 struct snd_soc_dapm_path *path;
822 if (widget->id != snd_soc_dapm_mixer &&
823 widget->id != snd_soc_dapm_mixer_named_ctl &&
824 widget->id != snd_soc_dapm_switch)
827 if (!snd_soc_test_bits(widget->codec, reg, val_mask, val))
830 /* find dapm widget path assoc with kcontrol */
831 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
832 if (path->kcontrol != kcontrol)
835 /* found, now check type */
839 path->connect = invert ? 0:1;
841 /* old connection must be powered down */
842 path->connect = invert ? 1:0;
847 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
848 dump_dapm(widget->codec, "mixer power update");
854 /* show dapm widget status in sys fs */
855 static ssize_t dapm_widget_show(struct device *dev,
856 struct device_attribute *attr, char *buf)
858 struct snd_soc_device *devdata = dev_get_drvdata(dev);
859 struct snd_soc_codec *codec = devdata->card->codec;
860 struct snd_soc_dapm_widget *w;
862 char *state = "not set";
864 list_for_each_entry(w, &codec->dapm_widgets, list) {
866 /* only display widgets that burnm power */
868 case snd_soc_dapm_hp:
869 case snd_soc_dapm_mic:
870 case snd_soc_dapm_spk:
871 case snd_soc_dapm_line:
872 case snd_soc_dapm_micbias:
873 case snd_soc_dapm_dac:
874 case snd_soc_dapm_adc:
875 case snd_soc_dapm_pga:
876 case snd_soc_dapm_mixer:
877 case snd_soc_dapm_mixer_named_ctl:
879 count += sprintf(buf + count, "%s: %s\n",
880 w->name, w->power ? "On":"Off");
887 switch (codec->bias_level) {
888 case SND_SOC_BIAS_ON:
891 case SND_SOC_BIAS_PREPARE:
894 case SND_SOC_BIAS_STANDBY:
897 case SND_SOC_BIAS_OFF:
901 count += sprintf(buf + count, "PM State: %s\n", state);
906 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
908 int snd_soc_dapm_sys_add(struct device *dev)
912 return device_create_file(dev, &dev_attr_dapm_widget);
915 static void snd_soc_dapm_sys_remove(struct device *dev)
918 device_remove_file(dev, &dev_attr_dapm_widget);
922 /* free all dapm widgets and resources */
923 static void dapm_free_widgets(struct snd_soc_codec *codec)
925 struct snd_soc_dapm_widget *w, *next_w;
926 struct snd_soc_dapm_path *p, *next_p;
928 list_for_each_entry_safe(w, next_w, &codec->dapm_widgets, list) {
933 list_for_each_entry_safe(p, next_p, &codec->dapm_paths, list) {
940 static int snd_soc_dapm_set_pin(struct snd_soc_codec *codec,
941 const char *pin, int status)
943 struct snd_soc_dapm_widget *w;
945 list_for_each_entry(w, &codec->dapm_widgets, list) {
946 if (!strcmp(w->name, pin)) {
947 pr_debug("dapm: %s: pin %s\n", codec->name, pin);
948 w->connected = status;
953 pr_err("dapm: %s: configuring unknown pin %s\n", codec->name, pin);
958 * snd_soc_dapm_sync - scan and power dapm paths
959 * @codec: audio codec
961 * Walks all dapm audio paths and powers widgets according to their
962 * stream or path usage.
964 * Returns 0 for success.
966 int snd_soc_dapm_sync(struct snd_soc_codec *codec)
968 int ret = dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
969 dump_dapm(codec, "sync");
972 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
974 static int snd_soc_dapm_add_route(struct snd_soc_codec *codec,
975 const char *sink, const char *control, const char *source)
977 struct snd_soc_dapm_path *path;
978 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
981 /* find src and dest widgets */
982 list_for_each_entry(w, &codec->dapm_widgets, list) {
984 if (!wsink && !(strcmp(w->name, sink))) {
988 if (!wsource && !(strcmp(w->name, source))) {
993 if (wsource == NULL || wsink == NULL)
996 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
1000 path->source = wsource;
1002 INIT_LIST_HEAD(&path->list);
1003 INIT_LIST_HEAD(&path->list_source);
1004 INIT_LIST_HEAD(&path->list_sink);
1006 /* check for external widgets */
1007 if (wsink->id == snd_soc_dapm_input) {
1008 if (wsource->id == snd_soc_dapm_micbias ||
1009 wsource->id == snd_soc_dapm_mic ||
1010 wsink->id == snd_soc_dapm_line ||
1011 wsink->id == snd_soc_dapm_output)
1014 if (wsource->id == snd_soc_dapm_output) {
1015 if (wsink->id == snd_soc_dapm_spk ||
1016 wsink->id == snd_soc_dapm_hp ||
1017 wsink->id == snd_soc_dapm_line ||
1018 wsink->id == snd_soc_dapm_input)
1022 /* connect static paths */
1023 if (control == NULL) {
1024 list_add(&path->list, &codec->dapm_paths);
1025 list_add(&path->list_sink, &wsink->sources);
1026 list_add(&path->list_source, &wsource->sinks);
1031 /* connect dynamic paths */
1033 case snd_soc_dapm_adc:
1034 case snd_soc_dapm_dac:
1035 case snd_soc_dapm_pga:
1036 case snd_soc_dapm_input:
1037 case snd_soc_dapm_output:
1038 case snd_soc_dapm_micbias:
1039 case snd_soc_dapm_vmid:
1040 case snd_soc_dapm_pre:
1041 case snd_soc_dapm_post:
1042 list_add(&path->list, &codec->dapm_paths);
1043 list_add(&path->list_sink, &wsink->sources);
1044 list_add(&path->list_source, &wsource->sinks);
1047 case snd_soc_dapm_mux:
1048 case snd_soc_dapm_value_mux:
1049 ret = dapm_connect_mux(codec, wsource, wsink, path, control,
1050 &wsink->kcontrols[0]);
1054 case snd_soc_dapm_switch:
1055 case snd_soc_dapm_mixer:
1056 case snd_soc_dapm_mixer_named_ctl:
1057 ret = dapm_connect_mixer(codec, wsource, wsink, path, control);
1061 case snd_soc_dapm_hp:
1062 case snd_soc_dapm_mic:
1063 case snd_soc_dapm_line:
1064 case snd_soc_dapm_spk:
1065 list_add(&path->list, &codec->dapm_paths);
1066 list_add(&path->list_sink, &wsink->sources);
1067 list_add(&path->list_source, &wsource->sinks);
1074 printk(KERN_WARNING "asoc: no dapm match for %s --> %s --> %s\n", source,
1081 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1083 * @route: audio routes
1084 * @num: number of routes
1086 * Connects 2 dapm widgets together via a named audio path. The sink is
1087 * the widget receiving the audio signal, whilst the source is the sender
1088 * of the audio signal.
1090 * Returns 0 for success else error. On error all resources can be freed
1091 * with a call to snd_soc_card_free().
1093 int snd_soc_dapm_add_routes(struct snd_soc_codec *codec,
1094 const struct snd_soc_dapm_route *route, int num)
1098 for (i = 0; i < num; i++) {
1099 ret = snd_soc_dapm_add_route(codec, route->sink,
1100 route->control, route->source);
1102 printk(KERN_ERR "Failed to add route %s->%s\n",
1112 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
1115 * snd_soc_dapm_new_widgets - add new dapm widgets
1116 * @codec: audio codec
1118 * Checks the codec for any new dapm widgets and creates them if found.
1120 * Returns 0 for success.
1122 int snd_soc_dapm_new_widgets(struct snd_soc_codec *codec)
1124 struct snd_soc_dapm_widget *w;
1126 list_for_each_entry(w, &codec->dapm_widgets, list)
1132 case snd_soc_dapm_switch:
1133 case snd_soc_dapm_mixer:
1134 case snd_soc_dapm_mixer_named_ctl:
1135 dapm_new_mixer(codec, w);
1137 case snd_soc_dapm_mux:
1138 case snd_soc_dapm_value_mux:
1139 dapm_new_mux(codec, w);
1141 case snd_soc_dapm_adc:
1142 case snd_soc_dapm_dac:
1143 case snd_soc_dapm_pga:
1144 dapm_new_pga(codec, w);
1146 case snd_soc_dapm_input:
1147 case snd_soc_dapm_output:
1148 case snd_soc_dapm_micbias:
1149 case snd_soc_dapm_spk:
1150 case snd_soc_dapm_hp:
1151 case snd_soc_dapm_mic:
1152 case snd_soc_dapm_line:
1153 case snd_soc_dapm_vmid:
1154 case snd_soc_dapm_pre:
1155 case snd_soc_dapm_post:
1161 dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
1164 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
1167 * snd_soc_dapm_get_volsw - dapm mixer get callback
1168 * @kcontrol: mixer control
1169 * @ucontrol: control element information
1171 * Callback to get the value of a dapm mixer control.
1173 * Returns 0 for success.
1175 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
1176 struct snd_ctl_elem_value *ucontrol)
1178 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1179 struct soc_mixer_control *mc =
1180 (struct soc_mixer_control *)kcontrol->private_value;
1181 unsigned int reg = mc->reg;
1182 unsigned int shift = mc->shift;
1183 unsigned int rshift = mc->rshift;
1185 unsigned int invert = mc->invert;
1186 unsigned int mask = (1 << fls(max)) - 1;
1188 /* return the saved value if we are powered down */
1189 if (widget->id == snd_soc_dapm_pga && !widget->power) {
1190 ucontrol->value.integer.value[0] = widget->saved_value;
1194 ucontrol->value.integer.value[0] =
1195 (snd_soc_read(widget->codec, reg) >> shift) & mask;
1196 if (shift != rshift)
1197 ucontrol->value.integer.value[1] =
1198 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
1200 ucontrol->value.integer.value[0] =
1201 max - ucontrol->value.integer.value[0];
1202 if (shift != rshift)
1203 ucontrol->value.integer.value[1] =
1204 max - ucontrol->value.integer.value[1];
1209 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
1212 * snd_soc_dapm_put_volsw - dapm mixer set callback
1213 * @kcontrol: mixer control
1214 * @ucontrol: control element information
1216 * Callback to set the value of a dapm mixer control.
1218 * Returns 0 for success.
1220 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
1221 struct snd_ctl_elem_value *ucontrol)
1223 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1224 struct soc_mixer_control *mc =
1225 (struct soc_mixer_control *)kcontrol->private_value;
1226 unsigned int reg = mc->reg;
1227 unsigned int shift = mc->shift;
1228 unsigned int rshift = mc->rshift;
1230 unsigned int mask = (1 << fls(max)) - 1;
1231 unsigned int invert = mc->invert;
1232 unsigned short val, val2, val_mask;
1235 val = (ucontrol->value.integer.value[0] & mask);
1239 val_mask = mask << shift;
1241 if (shift != rshift) {
1242 val2 = (ucontrol->value.integer.value[1] & mask);
1245 val_mask |= mask << rshift;
1246 val |= val2 << rshift;
1249 mutex_lock(&widget->codec->mutex);
1250 widget->value = val;
1252 /* save volume value if the widget is powered down */
1253 if (widget->id == snd_soc_dapm_pga && !widget->power) {
1254 widget->saved_value = val;
1255 mutex_unlock(&widget->codec->mutex);
1259 dapm_mixer_update_power(widget, kcontrol, reg, val_mask, val, invert);
1260 if (widget->event) {
1261 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1262 ret = widget->event(widget, kcontrol,
1263 SND_SOC_DAPM_PRE_REG);
1269 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1270 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1271 ret = widget->event(widget, kcontrol,
1272 SND_SOC_DAPM_POST_REG);
1274 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1277 mutex_unlock(&widget->codec->mutex);
1280 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
1283 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
1284 * @kcontrol: mixer control
1285 * @ucontrol: control element information
1287 * Callback to get the value of a dapm enumerated double mixer control.
1289 * Returns 0 for success.
1291 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
1292 struct snd_ctl_elem_value *ucontrol)
1294 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1295 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1296 unsigned short val, bitmask;
1298 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1300 val = snd_soc_read(widget->codec, e->reg);
1301 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
1302 if (e->shift_l != e->shift_r)
1303 ucontrol->value.enumerated.item[1] =
1304 (val >> e->shift_r) & (bitmask - 1);
1308 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
1311 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
1312 * @kcontrol: mixer control
1313 * @ucontrol: control element information
1315 * Callback to set the value of a dapm enumerated double mixer control.
1317 * Returns 0 for success.
1319 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
1320 struct snd_ctl_elem_value *ucontrol)
1322 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1323 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1324 unsigned short val, mux;
1325 unsigned short mask, bitmask;
1328 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1330 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1332 mux = ucontrol->value.enumerated.item[0];
1333 val = mux << e->shift_l;
1334 mask = (bitmask - 1) << e->shift_l;
1335 if (e->shift_l != e->shift_r) {
1336 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1338 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
1339 mask |= (bitmask - 1) << e->shift_r;
1342 mutex_lock(&widget->codec->mutex);
1343 widget->value = val;
1344 dapm_mux_update_power(widget, kcontrol, mask, mux, val, e);
1345 if (widget->event) {
1346 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1347 ret = widget->event(widget,
1348 kcontrol, SND_SOC_DAPM_PRE_REG);
1352 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1353 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1354 ret = widget->event(widget,
1355 kcontrol, SND_SOC_DAPM_POST_REG);
1357 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1360 mutex_unlock(&widget->codec->mutex);
1363 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
1366 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
1368 * @kcontrol: mixer control
1369 * @ucontrol: control element information
1371 * Callback to get the value of a dapm semi enumerated double mixer control.
1373 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1374 * used for handling bitfield coded enumeration for example.
1376 * Returns 0 for success.
1378 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
1379 struct snd_ctl_elem_value *ucontrol)
1381 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1382 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1383 unsigned short reg_val, val, mux;
1385 reg_val = snd_soc_read(widget->codec, e->reg);
1386 val = (reg_val >> e->shift_l) & e->mask;
1387 for (mux = 0; mux < e->max; mux++) {
1388 if (val == e->values[mux])
1391 ucontrol->value.enumerated.item[0] = mux;
1392 if (e->shift_l != e->shift_r) {
1393 val = (reg_val >> e->shift_r) & e->mask;
1394 for (mux = 0; mux < e->max; mux++) {
1395 if (val == e->values[mux])
1398 ucontrol->value.enumerated.item[1] = mux;
1403 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
1406 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
1408 * @kcontrol: mixer control
1409 * @ucontrol: control element information
1411 * Callback to set the value of a dapm semi enumerated double mixer control.
1413 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1414 * used for handling bitfield coded enumeration for example.
1416 * Returns 0 for success.
1418 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
1419 struct snd_ctl_elem_value *ucontrol)
1421 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1422 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1423 unsigned short val, mux;
1424 unsigned short mask;
1427 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1429 mux = ucontrol->value.enumerated.item[0];
1430 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
1431 mask = e->mask << e->shift_l;
1432 if (e->shift_l != e->shift_r) {
1433 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1435 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
1436 mask |= e->mask << e->shift_r;
1439 mutex_lock(&widget->codec->mutex);
1440 widget->value = val;
1441 dapm_mux_update_power(widget, kcontrol, mask, mux, val, e);
1442 if (widget->event) {
1443 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1444 ret = widget->event(widget,
1445 kcontrol, SND_SOC_DAPM_PRE_REG);
1449 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1450 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1451 ret = widget->event(widget,
1452 kcontrol, SND_SOC_DAPM_POST_REG);
1454 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1457 mutex_unlock(&widget->codec->mutex);
1460 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
1463 * snd_soc_dapm_info_pin_switch - Info for a pin switch
1465 * @kcontrol: mixer control
1466 * @uinfo: control element information
1468 * Callback to provide information about a pin switch control.
1470 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
1471 struct snd_ctl_elem_info *uinfo)
1473 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1475 uinfo->value.integer.min = 0;
1476 uinfo->value.integer.max = 1;
1480 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
1483 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
1485 * @kcontrol: mixer control
1488 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
1489 struct snd_ctl_elem_value *ucontrol)
1491 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1492 const char *pin = (const char *)kcontrol->private_value;
1494 mutex_lock(&codec->mutex);
1496 ucontrol->value.integer.value[0] =
1497 snd_soc_dapm_get_pin_status(codec, pin);
1499 mutex_unlock(&codec->mutex);
1503 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
1506 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
1508 * @kcontrol: mixer control
1511 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
1512 struct snd_ctl_elem_value *ucontrol)
1514 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1515 const char *pin = (const char *)kcontrol->private_value;
1517 mutex_lock(&codec->mutex);
1519 if (ucontrol->value.integer.value[0])
1520 snd_soc_dapm_enable_pin(codec, pin);
1522 snd_soc_dapm_disable_pin(codec, pin);
1524 snd_soc_dapm_sync(codec);
1526 mutex_unlock(&codec->mutex);
1530 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
1533 * snd_soc_dapm_new_control - create new dapm control
1534 * @codec: audio codec
1535 * @widget: widget template
1537 * Creates a new dapm control based upon the template.
1539 * Returns 0 for success else error.
1541 int snd_soc_dapm_new_control(struct snd_soc_codec *codec,
1542 const struct snd_soc_dapm_widget *widget)
1544 struct snd_soc_dapm_widget *w;
1546 if ((w = dapm_cnew_widget(widget)) == NULL)
1550 INIT_LIST_HEAD(&w->sources);
1551 INIT_LIST_HEAD(&w->sinks);
1552 INIT_LIST_HEAD(&w->list);
1553 list_add(&w->list, &codec->dapm_widgets);
1555 /* machine layer set ups unconnected pins and insertions */
1559 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
1562 * snd_soc_dapm_new_controls - create new dapm controls
1563 * @codec: audio codec
1564 * @widget: widget array
1565 * @num: number of widgets
1567 * Creates new DAPM controls based upon the templates.
1569 * Returns 0 for success else error.
1571 int snd_soc_dapm_new_controls(struct snd_soc_codec *codec,
1572 const struct snd_soc_dapm_widget *widget,
1577 for (i = 0; i < num; i++) {
1578 ret = snd_soc_dapm_new_control(codec, widget);
1581 "ASoC: Failed to create DAPM control %s: %d\n",
1589 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
1593 * snd_soc_dapm_stream_event - send a stream event to the dapm core
1594 * @codec: audio codec
1595 * @stream: stream name
1596 * @event: stream event
1598 * Sends a stream event to the dapm core. The core then makes any
1599 * necessary widget power changes.
1601 * Returns 0 for success else error.
1603 int snd_soc_dapm_stream_event(struct snd_soc_codec *codec,
1604 char *stream, int event)
1606 struct snd_soc_dapm_widget *w;
1611 mutex_lock(&codec->mutex);
1612 list_for_each_entry(w, &codec->dapm_widgets, list)
1616 pr_debug("widget %s\n %s stream %s event %d\n",
1617 w->name, w->sname, stream, event);
1618 if (strstr(w->sname, stream)) {
1620 case SND_SOC_DAPM_STREAM_START:
1623 case SND_SOC_DAPM_STREAM_STOP:
1626 case SND_SOC_DAPM_STREAM_SUSPEND:
1631 case SND_SOC_DAPM_STREAM_RESUME:
1637 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
1639 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
1644 mutex_unlock(&codec->mutex);
1646 dapm_power_widgets(codec, event);
1647 dump_dapm(codec, __func__);
1650 EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event);
1653 * snd_soc_dapm_set_bias_level - set the bias level for the system
1654 * @socdev: audio device
1655 * @level: level to configure
1657 * Configure the bias (power) levels for the SoC audio device.
1659 * Returns 0 for success else error.
1661 int snd_soc_dapm_set_bias_level(struct snd_soc_device *socdev,
1662 enum snd_soc_bias_level level)
1664 struct snd_soc_card *card = socdev->card;
1665 struct snd_soc_codec *codec = socdev->card->codec;
1668 if (card->set_bias_level)
1669 ret = card->set_bias_level(card, level);
1670 if (ret == 0 && codec->set_bias_level)
1671 ret = codec->set_bias_level(codec, level);
1677 * snd_soc_dapm_enable_pin - enable pin.
1681 * Enables input/output pin and it's parents or children widgets iff there is
1682 * a valid audio route and active audio stream.
1683 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1684 * do any widget power switching.
1686 int snd_soc_dapm_enable_pin(struct snd_soc_codec *codec, const char *pin)
1688 return snd_soc_dapm_set_pin(codec, pin, 1);
1690 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
1693 * snd_soc_dapm_disable_pin - disable pin.
1697 * Disables input/output pin and it's parents or children widgets.
1698 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1699 * do any widget power switching.
1701 int snd_soc_dapm_disable_pin(struct snd_soc_codec *codec, const char *pin)
1703 return snd_soc_dapm_set_pin(codec, pin, 0);
1705 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
1708 * snd_soc_dapm_nc_pin - permanently disable pin.
1712 * Marks the specified pin as being not connected, disabling it along
1713 * any parent or child widgets. At present this is identical to
1714 * snd_soc_dapm_disable_pin() but in future it will be extended to do
1715 * additional things such as disabling controls which only affect
1716 * paths through the pin.
1718 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1719 * do any widget power switching.
1721 int snd_soc_dapm_nc_pin(struct snd_soc_codec *codec, const char *pin)
1723 return snd_soc_dapm_set_pin(codec, pin, 0);
1725 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
1728 * snd_soc_dapm_get_pin_status - get audio pin status
1729 * @codec: audio codec
1730 * @pin: audio signal pin endpoint (or start point)
1732 * Get audio pin status - connected or disconnected.
1734 * Returns 1 for connected otherwise 0.
1736 int snd_soc_dapm_get_pin_status(struct snd_soc_codec *codec, const char *pin)
1738 struct snd_soc_dapm_widget *w;
1740 list_for_each_entry(w, &codec->dapm_widgets, list) {
1741 if (!strcmp(w->name, pin))
1742 return w->connected;
1747 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
1750 * snd_soc_dapm_free - free dapm resources
1751 * @socdev: SoC device
1753 * Free all dapm widgets and resources.
1755 void snd_soc_dapm_free(struct snd_soc_device *socdev)
1757 struct snd_soc_codec *codec = socdev->card->codec;
1759 snd_soc_dapm_sys_remove(socdev->dev);
1760 dapm_free_widgets(codec);
1762 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
1764 /* Module information */
1765 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
1766 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
1767 MODULE_LICENSE("GPL");