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)
336 name_len += 1 + strlen(w->name);
338 path->long_name = kmalloc(name_len, GFP_KERNEL);
340 if (path->long_name == NULL)
344 case snd_soc_dapm_mixer:
346 snprintf(path->long_name, name_len, "%s %s",
347 w->name, w->kcontrols[i].name);
349 case snd_soc_dapm_mixer_named_ctl:
350 snprintf(path->long_name, name_len, "%s",
351 w->kcontrols[i].name);
355 path->long_name[name_len - 1] = '\0';
357 path->kcontrol = snd_soc_cnew(&w->kcontrols[i], w,
359 ret = snd_ctl_add(codec->card, path->kcontrol);
361 printk(KERN_ERR "asoc: failed to add dapm kcontrol %s\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);
526 * Scan a single DAPM widget for a complete audio path and update the
527 * power status appropriately.
529 static int dapm_power_widget(struct snd_soc_codec *codec, int event,
530 struct snd_soc_dapm_widget *w)
532 int in, out, power_change, power, ret;
534 /* vmid - no action */
535 if (w->id == snd_soc_dapm_vmid)
539 if (w->id == snd_soc_dapm_adc && w->active) {
540 in = is_connected_input_ep(w);
541 dapm_clear_walk(w->codec);
542 w->power = (in != 0) ? 1 : 0;
548 if (w->id == snd_soc_dapm_dac && w->active) {
549 out = is_connected_output_ep(w);
550 dapm_clear_walk(w->codec);
551 w->power = (out != 0) ? 1 : 0;
556 /* pre and post event widgets */
557 if (w->id == snd_soc_dapm_pre) {
561 if (event == SND_SOC_DAPM_STREAM_START) {
563 NULL, SND_SOC_DAPM_PRE_PMU);
566 } else if (event == SND_SOC_DAPM_STREAM_STOP) {
568 NULL, SND_SOC_DAPM_PRE_PMD);
574 if (w->id == snd_soc_dapm_post) {
578 if (event == SND_SOC_DAPM_STREAM_START) {
580 NULL, SND_SOC_DAPM_POST_PMU);
583 } else if (event == SND_SOC_DAPM_STREAM_STOP) {
585 NULL, SND_SOC_DAPM_POST_PMD);
592 /* all other widgets */
593 in = is_connected_input_ep(w);
594 dapm_clear_walk(w->codec);
595 out = is_connected_output_ep(w);
596 dapm_clear_walk(w->codec);
597 power = (out != 0 && in != 0) ? 1 : 0;
598 power_change = (w->power == power) ? 0 : 1;
604 /* call any power change event handlers */
606 pr_debug("power %s event for %s flags %x\n",
607 w->power ? "on" : "off",
608 w->name, w->event_flags);
610 /* power up pre event */
611 if (power && w->event &&
612 (w->event_flags & SND_SOC_DAPM_PRE_PMU)) {
613 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMU);
618 /* power down pre event */
619 if (!power && w->event &&
620 (w->event_flags & SND_SOC_DAPM_PRE_PMD)) {
621 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMD);
626 /* Lower PGA volume to reduce pops */
627 if (w->id == snd_soc_dapm_pga && !power)
628 dapm_set_pga(w, power);
632 /* Raise PGA volume to reduce pops */
633 if (w->id == snd_soc_dapm_pga && power)
634 dapm_set_pga(w, power);
636 /* power up post event */
637 if (power && w->event &&
638 (w->event_flags & SND_SOC_DAPM_POST_PMU)) {
640 NULL, SND_SOC_DAPM_POST_PMU);
645 /* power down post event */
646 if (!power && w->event &&
647 (w->event_flags & SND_SOC_DAPM_POST_PMD)) {
648 ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMD);
657 * Scan each dapm widget for complete audio path.
658 * A complete path is a route that has valid endpoints i.e.:-
660 * o DAC to output pin.
661 * o Input Pin to ADC.
662 * o Input pin to Output pin (bypass, sidetone)
663 * o DAC to ADC (loopback).
665 static int dapm_power_widgets(struct snd_soc_codec *codec, int event)
667 struct snd_soc_dapm_widget *w;
668 int i, c = 1, *seq = NULL, ret = 0;
670 /* do we have a sequenced stream event */
671 if (event == SND_SOC_DAPM_STREAM_START) {
672 c = ARRAY_SIZE(dapm_up_seq);
674 } else if (event == SND_SOC_DAPM_STREAM_STOP) {
675 c = ARRAY_SIZE(dapm_down_seq);
679 for (i = 0; i < c; i++) {
680 list_for_each_entry(w, &codec->dapm_widgets, list) {
682 /* is widget in stream order */
683 if (seq && seq[i] && w->id != seq[i])
686 ret = dapm_power_widget(codec, event, w);
696 static void dbg_dump_dapm(struct snd_soc_codec* codec, const char *action)
698 struct snd_soc_dapm_widget *w;
699 struct snd_soc_dapm_path *p = NULL;
702 printk("DAPM %s %s\n", codec->name, action);
704 list_for_each_entry(w, &codec->dapm_widgets, list) {
706 /* only display widgets that effect routing */
708 case snd_soc_dapm_pre:
709 case snd_soc_dapm_post:
710 case snd_soc_dapm_vmid:
712 case snd_soc_dapm_mux:
713 case snd_soc_dapm_value_mux:
714 case snd_soc_dapm_output:
715 case snd_soc_dapm_input:
716 case snd_soc_dapm_switch:
717 case snd_soc_dapm_hp:
718 case snd_soc_dapm_mic:
719 case snd_soc_dapm_spk:
720 case snd_soc_dapm_line:
721 case snd_soc_dapm_micbias:
722 case snd_soc_dapm_dac:
723 case snd_soc_dapm_adc:
724 case snd_soc_dapm_pga:
725 case snd_soc_dapm_mixer:
726 case snd_soc_dapm_mixer_named_ctl:
728 in = is_connected_input_ep(w);
729 dapm_clear_walk(w->codec);
730 out = is_connected_output_ep(w);
731 dapm_clear_walk(w->codec);
732 printk("%s: %s in %d out %d\n", w->name,
733 w->power ? "On":"Off",in, out);
735 list_for_each_entry(p, &w->sources, list_sink) {
737 printk(" in %s %s\n", p->name ? p->name : "static",
740 list_for_each_entry(p, &w->sinks, list_source) {
742 printk(" out %s %s\n", p->name ? p->name : "static",
752 /* test and update the power status of a mux widget */
753 static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
754 struct snd_kcontrol *kcontrol, int mask,
755 int mux, int val, struct soc_enum *e)
757 struct snd_soc_dapm_path *path;
760 if (widget->id != snd_soc_dapm_mux &&
761 widget->id != snd_soc_dapm_value_mux)
764 if (!snd_soc_test_bits(widget->codec, e->reg, mask, val))
767 /* find dapm widget path assoc with kcontrol */
768 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
769 if (path->kcontrol != kcontrol)
772 if (!path->name || !e->texts[mux])
776 /* we now need to match the string in the enum to the path */
777 if (!(strcmp(path->name, e->texts[mux])))
778 path->connect = 1; /* new connection */
780 path->connect = 0; /* old connection must be powered down */
784 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
785 dump_dapm(widget->codec, "mux power update");
791 /* test and update the power status of a mixer or switch widget */
792 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
793 struct snd_kcontrol *kcontrol, int reg,
794 int val_mask, int val, int invert)
796 struct snd_soc_dapm_path *path;
799 if (widget->id != snd_soc_dapm_mixer &&
800 widget->id != snd_soc_dapm_mixer_named_ctl &&
801 widget->id != snd_soc_dapm_switch)
804 if (!snd_soc_test_bits(widget->codec, reg, val_mask, val))
807 /* find dapm widget path assoc with kcontrol */
808 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
809 if (path->kcontrol != kcontrol)
812 /* found, now check type */
816 path->connect = invert ? 0:1;
818 /* old connection must be powered down */
819 path->connect = invert ? 1:0;
824 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
825 dump_dapm(widget->codec, "mixer power update");
831 /* show dapm widget status in sys fs */
832 static ssize_t dapm_widget_show(struct device *dev,
833 struct device_attribute *attr, char *buf)
835 struct snd_soc_device *devdata = dev_get_drvdata(dev);
836 struct snd_soc_codec *codec = devdata->card->codec;
837 struct snd_soc_dapm_widget *w;
839 char *state = "not set";
841 list_for_each_entry(w, &codec->dapm_widgets, list) {
843 /* only display widgets that burnm power */
845 case snd_soc_dapm_hp:
846 case snd_soc_dapm_mic:
847 case snd_soc_dapm_spk:
848 case snd_soc_dapm_line:
849 case snd_soc_dapm_micbias:
850 case snd_soc_dapm_dac:
851 case snd_soc_dapm_adc:
852 case snd_soc_dapm_pga:
853 case snd_soc_dapm_mixer:
854 case snd_soc_dapm_mixer_named_ctl:
856 count += sprintf(buf + count, "%s: %s\n",
857 w->name, w->power ? "On":"Off");
864 switch (codec->bias_level) {
865 case SND_SOC_BIAS_ON:
868 case SND_SOC_BIAS_PREPARE:
871 case SND_SOC_BIAS_STANDBY:
874 case SND_SOC_BIAS_OFF:
878 count += sprintf(buf + count, "PM State: %s\n", state);
883 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
885 int snd_soc_dapm_sys_add(struct device *dev)
889 return device_create_file(dev, &dev_attr_dapm_widget);
892 static void snd_soc_dapm_sys_remove(struct device *dev)
895 device_remove_file(dev, &dev_attr_dapm_widget);
899 /* free all dapm widgets and resources */
900 static void dapm_free_widgets(struct snd_soc_codec *codec)
902 struct snd_soc_dapm_widget *w, *next_w;
903 struct snd_soc_dapm_path *p, *next_p;
905 list_for_each_entry_safe(w, next_w, &codec->dapm_widgets, list) {
910 list_for_each_entry_safe(p, next_p, &codec->dapm_paths, list) {
917 static int snd_soc_dapm_set_pin(struct snd_soc_codec *codec,
918 const char *pin, int status)
920 struct snd_soc_dapm_widget *w;
922 list_for_each_entry(w, &codec->dapm_widgets, list) {
923 if (!strcmp(w->name, pin)) {
924 pr_debug("dapm: %s: pin %s\n", codec->name, pin);
925 w->connected = status;
930 pr_err("dapm: %s: configuring unknown pin %s\n", codec->name, pin);
935 * snd_soc_dapm_sync - scan and power dapm paths
936 * @codec: audio codec
938 * Walks all dapm audio paths and powers widgets according to their
939 * stream or path usage.
941 * Returns 0 for success.
943 int snd_soc_dapm_sync(struct snd_soc_codec *codec)
945 int ret = dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
946 dump_dapm(codec, "sync");
949 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
951 static int snd_soc_dapm_add_route(struct snd_soc_codec *codec,
952 const char *sink, const char *control, const char *source)
954 struct snd_soc_dapm_path *path;
955 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
958 /* find src and dest widgets */
959 list_for_each_entry(w, &codec->dapm_widgets, list) {
961 if (!wsink && !(strcmp(w->name, sink))) {
965 if (!wsource && !(strcmp(w->name, source))) {
970 if (wsource == NULL || wsink == NULL)
973 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
977 path->source = wsource;
979 INIT_LIST_HEAD(&path->list);
980 INIT_LIST_HEAD(&path->list_source);
981 INIT_LIST_HEAD(&path->list_sink);
983 /* check for external widgets */
984 if (wsink->id == snd_soc_dapm_input) {
985 if (wsource->id == snd_soc_dapm_micbias ||
986 wsource->id == snd_soc_dapm_mic ||
987 wsink->id == snd_soc_dapm_line ||
988 wsink->id == snd_soc_dapm_output)
991 if (wsource->id == snd_soc_dapm_output) {
992 if (wsink->id == snd_soc_dapm_spk ||
993 wsink->id == snd_soc_dapm_hp ||
994 wsink->id == snd_soc_dapm_line ||
995 wsink->id == snd_soc_dapm_input)
999 /* connect static paths */
1000 if (control == NULL) {
1001 list_add(&path->list, &codec->dapm_paths);
1002 list_add(&path->list_sink, &wsink->sources);
1003 list_add(&path->list_source, &wsource->sinks);
1008 /* connect dynamic paths */
1010 case snd_soc_dapm_adc:
1011 case snd_soc_dapm_dac:
1012 case snd_soc_dapm_pga:
1013 case snd_soc_dapm_input:
1014 case snd_soc_dapm_output:
1015 case snd_soc_dapm_micbias:
1016 case snd_soc_dapm_vmid:
1017 case snd_soc_dapm_pre:
1018 case snd_soc_dapm_post:
1019 list_add(&path->list, &codec->dapm_paths);
1020 list_add(&path->list_sink, &wsink->sources);
1021 list_add(&path->list_source, &wsource->sinks);
1024 case snd_soc_dapm_mux:
1025 case snd_soc_dapm_value_mux:
1026 ret = dapm_connect_mux(codec, wsource, wsink, path, control,
1027 &wsink->kcontrols[0]);
1031 case snd_soc_dapm_switch:
1032 case snd_soc_dapm_mixer:
1033 case snd_soc_dapm_mixer_named_ctl:
1034 ret = dapm_connect_mixer(codec, wsource, wsink, path, control);
1038 case snd_soc_dapm_hp:
1039 case snd_soc_dapm_mic:
1040 case snd_soc_dapm_line:
1041 case snd_soc_dapm_spk:
1042 list_add(&path->list, &codec->dapm_paths);
1043 list_add(&path->list_sink, &wsink->sources);
1044 list_add(&path->list_source, &wsource->sinks);
1051 printk(KERN_WARNING "asoc: no dapm match for %s --> %s --> %s\n", source,
1058 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1060 * @route: audio routes
1061 * @num: number of routes
1063 * Connects 2 dapm widgets together via a named audio path. The sink is
1064 * the widget receiving the audio signal, whilst the source is the sender
1065 * of the audio signal.
1067 * Returns 0 for success else error. On error all resources can be freed
1068 * with a call to snd_soc_card_free().
1070 int snd_soc_dapm_add_routes(struct snd_soc_codec *codec,
1071 const struct snd_soc_dapm_route *route, int num)
1075 for (i = 0; i < num; i++) {
1076 ret = snd_soc_dapm_add_route(codec, route->sink,
1077 route->control, route->source);
1079 printk(KERN_ERR "Failed to add route %s->%s\n",
1089 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
1092 * snd_soc_dapm_new_widgets - add new dapm widgets
1093 * @codec: audio codec
1095 * Checks the codec for any new dapm widgets and creates them if found.
1097 * Returns 0 for success.
1099 int snd_soc_dapm_new_widgets(struct snd_soc_codec *codec)
1101 struct snd_soc_dapm_widget *w;
1103 list_for_each_entry(w, &codec->dapm_widgets, list)
1109 case snd_soc_dapm_switch:
1110 case snd_soc_dapm_mixer:
1111 case snd_soc_dapm_mixer_named_ctl:
1112 dapm_new_mixer(codec, w);
1114 case snd_soc_dapm_mux:
1115 case snd_soc_dapm_value_mux:
1116 dapm_new_mux(codec, w);
1118 case snd_soc_dapm_adc:
1119 case snd_soc_dapm_dac:
1120 case snd_soc_dapm_pga:
1121 dapm_new_pga(codec, w);
1123 case snd_soc_dapm_input:
1124 case snd_soc_dapm_output:
1125 case snd_soc_dapm_micbias:
1126 case snd_soc_dapm_spk:
1127 case snd_soc_dapm_hp:
1128 case snd_soc_dapm_mic:
1129 case snd_soc_dapm_line:
1130 case snd_soc_dapm_vmid:
1131 case snd_soc_dapm_pre:
1132 case snd_soc_dapm_post:
1138 dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
1141 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
1144 * snd_soc_dapm_get_volsw - dapm mixer get callback
1145 * @kcontrol: mixer control
1146 * @ucontrol: control element information
1148 * Callback to get the value of a dapm mixer control.
1150 * Returns 0 for success.
1152 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
1153 struct snd_ctl_elem_value *ucontrol)
1155 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1156 struct soc_mixer_control *mc =
1157 (struct soc_mixer_control *)kcontrol->private_value;
1158 unsigned int reg = mc->reg;
1159 unsigned int shift = mc->shift;
1160 unsigned int rshift = mc->rshift;
1162 unsigned int invert = mc->invert;
1163 unsigned int mask = (1 << fls(max)) - 1;
1165 /* return the saved value if we are powered down */
1166 if (widget->id == snd_soc_dapm_pga && !widget->power) {
1167 ucontrol->value.integer.value[0] = widget->saved_value;
1171 ucontrol->value.integer.value[0] =
1172 (snd_soc_read(widget->codec, reg) >> shift) & mask;
1173 if (shift != rshift)
1174 ucontrol->value.integer.value[1] =
1175 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
1177 ucontrol->value.integer.value[0] =
1178 max - ucontrol->value.integer.value[0];
1179 if (shift != rshift)
1180 ucontrol->value.integer.value[1] =
1181 max - ucontrol->value.integer.value[1];
1186 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
1189 * snd_soc_dapm_put_volsw - dapm mixer set callback
1190 * @kcontrol: mixer control
1191 * @ucontrol: control element information
1193 * Callback to set the value of a dapm mixer control.
1195 * Returns 0 for success.
1197 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
1198 struct snd_ctl_elem_value *ucontrol)
1200 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1201 struct soc_mixer_control *mc =
1202 (struct soc_mixer_control *)kcontrol->private_value;
1203 unsigned int reg = mc->reg;
1204 unsigned int shift = mc->shift;
1205 unsigned int rshift = mc->rshift;
1207 unsigned int mask = (1 << fls(max)) - 1;
1208 unsigned int invert = mc->invert;
1209 unsigned short val, val2, val_mask;
1212 val = (ucontrol->value.integer.value[0] & mask);
1216 val_mask = mask << shift;
1218 if (shift != rshift) {
1219 val2 = (ucontrol->value.integer.value[1] & mask);
1222 val_mask |= mask << rshift;
1223 val |= val2 << rshift;
1226 mutex_lock(&widget->codec->mutex);
1227 widget->value = val;
1229 /* save volume value if the widget is powered down */
1230 if (widget->id == snd_soc_dapm_pga && !widget->power) {
1231 widget->saved_value = val;
1232 mutex_unlock(&widget->codec->mutex);
1236 dapm_mixer_update_power(widget, kcontrol, reg, val_mask, val, invert);
1237 if (widget->event) {
1238 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1239 ret = widget->event(widget, kcontrol,
1240 SND_SOC_DAPM_PRE_REG);
1246 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1247 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1248 ret = widget->event(widget, kcontrol,
1249 SND_SOC_DAPM_POST_REG);
1251 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1254 mutex_unlock(&widget->codec->mutex);
1257 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
1260 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
1261 * @kcontrol: mixer control
1262 * @ucontrol: control element information
1264 * Callback to get the value of a dapm enumerated double mixer control.
1266 * Returns 0 for success.
1268 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
1269 struct snd_ctl_elem_value *ucontrol)
1271 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1272 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1273 unsigned short val, bitmask;
1275 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1277 val = snd_soc_read(widget->codec, e->reg);
1278 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
1279 if (e->shift_l != e->shift_r)
1280 ucontrol->value.enumerated.item[1] =
1281 (val >> e->shift_r) & (bitmask - 1);
1285 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
1288 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
1289 * @kcontrol: mixer control
1290 * @ucontrol: control element information
1292 * Callback to set the value of a dapm enumerated double mixer control.
1294 * Returns 0 for success.
1296 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
1297 struct snd_ctl_elem_value *ucontrol)
1299 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1300 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1301 unsigned short val, mux;
1302 unsigned short mask, bitmask;
1305 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1307 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1309 mux = ucontrol->value.enumerated.item[0];
1310 val = mux << e->shift_l;
1311 mask = (bitmask - 1) << e->shift_l;
1312 if (e->shift_l != e->shift_r) {
1313 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1315 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
1316 mask |= (bitmask - 1) << e->shift_r;
1319 mutex_lock(&widget->codec->mutex);
1320 widget->value = val;
1321 dapm_mux_update_power(widget, kcontrol, mask, mux, val, e);
1322 if (widget->event) {
1323 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1324 ret = widget->event(widget,
1325 kcontrol, SND_SOC_DAPM_PRE_REG);
1329 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1330 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1331 ret = widget->event(widget,
1332 kcontrol, SND_SOC_DAPM_POST_REG);
1334 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1337 mutex_unlock(&widget->codec->mutex);
1340 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
1343 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
1345 * @kcontrol: mixer control
1346 * @ucontrol: control element information
1348 * Callback to get the value of a dapm semi enumerated double mixer control.
1350 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1351 * used for handling bitfield coded enumeration for example.
1353 * Returns 0 for success.
1355 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
1356 struct snd_ctl_elem_value *ucontrol)
1358 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1359 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1360 unsigned short reg_val, val, mux;
1362 reg_val = snd_soc_read(widget->codec, e->reg);
1363 val = (reg_val >> e->shift_l) & e->mask;
1364 for (mux = 0; mux < e->max; mux++) {
1365 if (val == e->values[mux])
1368 ucontrol->value.enumerated.item[0] = mux;
1369 if (e->shift_l != e->shift_r) {
1370 val = (reg_val >> e->shift_r) & e->mask;
1371 for (mux = 0; mux < e->max; mux++) {
1372 if (val == e->values[mux])
1375 ucontrol->value.enumerated.item[1] = mux;
1380 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
1383 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
1385 * @kcontrol: mixer control
1386 * @ucontrol: control element information
1388 * Callback to set the value of a dapm semi enumerated double mixer control.
1390 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1391 * used for handling bitfield coded enumeration for example.
1393 * Returns 0 for success.
1395 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
1396 struct snd_ctl_elem_value *ucontrol)
1398 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1399 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1400 unsigned short val, mux;
1401 unsigned short mask;
1404 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1406 mux = ucontrol->value.enumerated.item[0];
1407 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
1408 mask = e->mask << e->shift_l;
1409 if (e->shift_l != e->shift_r) {
1410 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1412 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
1413 mask |= e->mask << e->shift_r;
1416 mutex_lock(&widget->codec->mutex);
1417 widget->value = val;
1418 dapm_mux_update_power(widget, kcontrol, mask, mux, val, e);
1419 if (widget->event) {
1420 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1421 ret = widget->event(widget,
1422 kcontrol, SND_SOC_DAPM_PRE_REG);
1426 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1427 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1428 ret = widget->event(widget,
1429 kcontrol, SND_SOC_DAPM_POST_REG);
1431 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1434 mutex_unlock(&widget->codec->mutex);
1437 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
1440 * snd_soc_dapm_info_pin_switch - Info for a pin switch
1442 * @kcontrol: mixer control
1443 * @uinfo: control element information
1445 * Callback to provide information about a pin switch control.
1447 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
1448 struct snd_ctl_elem_info *uinfo)
1450 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1452 uinfo->value.integer.min = 0;
1453 uinfo->value.integer.max = 1;
1457 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
1460 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
1462 * @kcontrol: mixer control
1465 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
1466 struct snd_ctl_elem_value *ucontrol)
1468 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1469 const char *pin = (const char *)kcontrol->private_value;
1471 mutex_lock(&codec->mutex);
1473 ucontrol->value.integer.value[0] =
1474 snd_soc_dapm_get_pin_status(codec, pin);
1476 mutex_unlock(&codec->mutex);
1480 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
1483 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
1485 * @kcontrol: mixer control
1488 int snd_soc_dapm_put_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 if (ucontrol->value.integer.value[0])
1497 snd_soc_dapm_enable_pin(codec, pin);
1499 snd_soc_dapm_disable_pin(codec, pin);
1501 snd_soc_dapm_sync(codec);
1503 mutex_unlock(&codec->mutex);
1507 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
1510 * snd_soc_dapm_new_control - create new dapm control
1511 * @codec: audio codec
1512 * @widget: widget template
1514 * Creates a new dapm control based upon the template.
1516 * Returns 0 for success else error.
1518 int snd_soc_dapm_new_control(struct snd_soc_codec *codec,
1519 const struct snd_soc_dapm_widget *widget)
1521 struct snd_soc_dapm_widget *w;
1523 if ((w = dapm_cnew_widget(widget)) == NULL)
1527 INIT_LIST_HEAD(&w->sources);
1528 INIT_LIST_HEAD(&w->sinks);
1529 INIT_LIST_HEAD(&w->list);
1530 list_add(&w->list, &codec->dapm_widgets);
1532 /* machine layer set ups unconnected pins and insertions */
1536 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
1539 * snd_soc_dapm_new_controls - create new dapm controls
1540 * @codec: audio codec
1541 * @widget: widget array
1542 * @num: number of widgets
1544 * Creates new DAPM controls based upon the templates.
1546 * Returns 0 for success else error.
1548 int snd_soc_dapm_new_controls(struct snd_soc_codec *codec,
1549 const struct snd_soc_dapm_widget *widget,
1554 for (i = 0; i < num; i++) {
1555 ret = snd_soc_dapm_new_control(codec, widget);
1558 "ASoC: Failed to create DAPM control %s: %d\n",
1566 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
1570 * snd_soc_dapm_stream_event - send a stream event to the dapm core
1571 * @codec: audio codec
1572 * @stream: stream name
1573 * @event: stream event
1575 * Sends a stream event to the dapm core. The core then makes any
1576 * necessary widget power changes.
1578 * Returns 0 for success else error.
1580 int snd_soc_dapm_stream_event(struct snd_soc_codec *codec,
1581 char *stream, int event)
1583 struct snd_soc_dapm_widget *w;
1588 mutex_lock(&codec->mutex);
1589 list_for_each_entry(w, &codec->dapm_widgets, list)
1593 pr_debug("widget %s\n %s stream %s event %d\n",
1594 w->name, w->sname, stream, event);
1595 if (strstr(w->sname, stream)) {
1597 case SND_SOC_DAPM_STREAM_START:
1600 case SND_SOC_DAPM_STREAM_STOP:
1603 case SND_SOC_DAPM_STREAM_SUSPEND:
1608 case SND_SOC_DAPM_STREAM_RESUME:
1614 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
1616 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
1621 mutex_unlock(&codec->mutex);
1623 dapm_power_widgets(codec, event);
1624 dump_dapm(codec, __func__);
1627 EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event);
1630 * snd_soc_dapm_set_bias_level - set the bias level for the system
1631 * @socdev: audio device
1632 * @level: level to configure
1634 * Configure the bias (power) levels for the SoC audio device.
1636 * Returns 0 for success else error.
1638 int snd_soc_dapm_set_bias_level(struct snd_soc_device *socdev,
1639 enum snd_soc_bias_level level)
1641 struct snd_soc_card *card = socdev->card;
1642 struct snd_soc_codec *codec = socdev->card->codec;
1645 if (card->set_bias_level)
1646 ret = card->set_bias_level(card, level);
1647 if (ret == 0 && codec->set_bias_level)
1648 ret = codec->set_bias_level(codec, level);
1654 * snd_soc_dapm_enable_pin - enable pin.
1658 * Enables input/output pin and it's parents or children widgets iff there is
1659 * a valid audio route and active audio stream.
1660 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1661 * do any widget power switching.
1663 int snd_soc_dapm_enable_pin(struct snd_soc_codec *codec, const char *pin)
1665 return snd_soc_dapm_set_pin(codec, pin, 1);
1667 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
1670 * snd_soc_dapm_disable_pin - disable pin.
1674 * Disables input/output pin and it's parents or children widgets.
1675 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1676 * do any widget power switching.
1678 int snd_soc_dapm_disable_pin(struct snd_soc_codec *codec, const char *pin)
1680 return snd_soc_dapm_set_pin(codec, pin, 0);
1682 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
1685 * snd_soc_dapm_nc_pin - permanently disable pin.
1689 * Marks the specified pin as being not connected, disabling it along
1690 * any parent or child widgets. At present this is identical to
1691 * snd_soc_dapm_disable_pin() but in future it will be extended to do
1692 * additional things such as disabling controls which only affect
1693 * paths through the pin.
1695 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1696 * do any widget power switching.
1698 int snd_soc_dapm_nc_pin(struct snd_soc_codec *codec, const char *pin)
1700 return snd_soc_dapm_set_pin(codec, pin, 0);
1702 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
1705 * snd_soc_dapm_get_pin_status - get audio pin status
1706 * @codec: audio codec
1707 * @pin: audio signal pin endpoint (or start point)
1709 * Get audio pin status - connected or disconnected.
1711 * Returns 1 for connected otherwise 0.
1713 int snd_soc_dapm_get_pin_status(struct snd_soc_codec *codec, const char *pin)
1715 struct snd_soc_dapm_widget *w;
1717 list_for_each_entry(w, &codec->dapm_widgets, list) {
1718 if (!strcmp(w->name, pin))
1719 return w->connected;
1724 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
1727 * snd_soc_dapm_free - free dapm resources
1728 * @socdev: SoC device
1730 * Free all dapm widgets and resources.
1732 void snd_soc_dapm_free(struct snd_soc_device *socdev)
1734 struct snd_soc_codec *codec = socdev->card->codec;
1736 snd_soc_dapm_sys_remove(socdev->dev);
1737 dapm_free_widgets(codec);
1739 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
1741 /* Module information */
1742 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
1743 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
1744 MODULE_LICENSE("GPL");