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] = 0,
56 [snd_soc_dapm_supply] = 1,
57 [snd_soc_dapm_micbias] = 2,
58 [snd_soc_dapm_mic] = 3,
59 [snd_soc_dapm_mux] = 4,
60 [snd_soc_dapm_value_mux] = 5,
61 [snd_soc_dapm_dac] = 6,
62 [snd_soc_dapm_mixer] = 7,
63 [snd_soc_dapm_mixer_named_ctl] = 8,
64 [snd_soc_dapm_pga] = 9,
65 [snd_soc_dapm_adc] = 10,
66 [snd_soc_dapm_hp] = 11,
67 [snd_soc_dapm_spk] = 12,
68 [snd_soc_dapm_post] = 13,
71 static int dapm_down_seq[] = {
72 [snd_soc_dapm_pre] = 0,
73 [snd_soc_dapm_adc] = 1,
74 [snd_soc_dapm_hp] = 2,
75 [snd_soc_dapm_spk] = 3,
76 [snd_soc_dapm_pga] = 4,
77 [snd_soc_dapm_mixer_named_ctl] = 5,
78 [snd_soc_dapm_mixer] = 6,
79 [snd_soc_dapm_dac] = 7,
80 [snd_soc_dapm_mic] = 8,
81 [snd_soc_dapm_micbias] = 9,
82 [snd_soc_dapm_mux] = 10,
83 [snd_soc_dapm_value_mux] = 11,
84 [snd_soc_dapm_supply] = 12,
85 [snd_soc_dapm_post] = 13,
88 static void pop_wait(u32 pop_time)
91 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
94 static void pop_dbg(u32 pop_time, const char *fmt, ...)
108 /* create a new dapm widget */
109 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
110 const struct snd_soc_dapm_widget *_widget)
112 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
116 * snd_soc_dapm_set_bias_level - set the bias level for the system
117 * @socdev: audio device
118 * @level: level to configure
120 * Configure the bias (power) levels for the SoC audio device.
122 * Returns 0 for success else error.
124 static int snd_soc_dapm_set_bias_level(struct snd_soc_device *socdev,
125 enum snd_soc_bias_level level)
127 struct snd_soc_card *card = socdev->card;
128 struct snd_soc_codec *codec = socdev->card->codec;
132 case SND_SOC_BIAS_ON:
133 dev_dbg(socdev->dev, "Setting full bias\n");
135 case SND_SOC_BIAS_PREPARE:
136 dev_dbg(socdev->dev, "Setting bias prepare\n");
138 case SND_SOC_BIAS_STANDBY:
139 dev_dbg(socdev->dev, "Setting standby bias\n");
141 case SND_SOC_BIAS_OFF:
142 dev_dbg(socdev->dev, "Setting bias off\n");
145 dev_err(socdev->dev, "Setting invalid bias %d\n", level);
149 if (card->set_bias_level)
150 ret = card->set_bias_level(card, level);
151 if (ret == 0 && codec->set_bias_level)
152 ret = codec->set_bias_level(codec, level);
157 /* set up initial codec paths */
158 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
159 struct snd_soc_dapm_path *p, int i)
162 case snd_soc_dapm_switch:
163 case snd_soc_dapm_mixer:
164 case snd_soc_dapm_mixer_named_ctl: {
166 struct soc_mixer_control *mc = (struct soc_mixer_control *)
167 w->kcontrols[i].private_value;
168 unsigned int reg = mc->reg;
169 unsigned int shift = mc->shift;
171 unsigned int mask = (1 << fls(max)) - 1;
172 unsigned int invert = mc->invert;
174 val = snd_soc_read(w->codec, reg);
175 val = (val >> shift) & mask;
177 if ((invert && !val) || (!invert && val))
183 case snd_soc_dapm_mux: {
184 struct soc_enum *e = (struct soc_enum *)w->kcontrols[i].private_value;
185 int val, item, bitmask;
187 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
189 val = snd_soc_read(w->codec, e->reg);
190 item = (val >> e->shift_l) & (bitmask - 1);
193 for (i = 0; i < e->max; i++) {
194 if (!(strcmp(p->name, e->texts[i])) && item == i)
199 case snd_soc_dapm_value_mux: {
200 struct soc_enum *e = (struct soc_enum *)
201 w->kcontrols[i].private_value;
204 val = snd_soc_read(w->codec, e->reg);
205 val = (val >> e->shift_l) & e->mask;
206 for (item = 0; item < e->max; item++) {
207 if (val == e->values[item])
212 for (i = 0; i < e->max; i++) {
213 if (!(strcmp(p->name, e->texts[i])) && item == i)
218 /* does not effect routing - always connected */
219 case snd_soc_dapm_pga:
220 case snd_soc_dapm_output:
221 case snd_soc_dapm_adc:
222 case snd_soc_dapm_input:
223 case snd_soc_dapm_dac:
224 case snd_soc_dapm_micbias:
225 case snd_soc_dapm_vmid:
226 case snd_soc_dapm_supply:
229 /* does effect routing - dynamically connected */
230 case snd_soc_dapm_hp:
231 case snd_soc_dapm_mic:
232 case snd_soc_dapm_spk:
233 case snd_soc_dapm_line:
234 case snd_soc_dapm_pre:
235 case snd_soc_dapm_post:
241 /* connect mux widget to its interconnecting audio paths */
242 static int dapm_connect_mux(struct snd_soc_codec *codec,
243 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
244 struct snd_soc_dapm_path *path, const char *control_name,
245 const struct snd_kcontrol_new *kcontrol)
247 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
250 for (i = 0; i < e->max; i++) {
251 if (!(strcmp(control_name, e->texts[i]))) {
252 list_add(&path->list, &codec->dapm_paths);
253 list_add(&path->list_sink, &dest->sources);
254 list_add(&path->list_source, &src->sinks);
255 path->name = (char*)e->texts[i];
256 dapm_set_path_status(dest, path, 0);
264 /* connect mixer widget to its interconnecting audio paths */
265 static int dapm_connect_mixer(struct snd_soc_codec *codec,
266 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
267 struct snd_soc_dapm_path *path, const char *control_name)
271 /* search for mixer kcontrol */
272 for (i = 0; i < dest->num_kcontrols; i++) {
273 if (!strcmp(control_name, dest->kcontrols[i].name)) {
274 list_add(&path->list, &codec->dapm_paths);
275 list_add(&path->list_sink, &dest->sources);
276 list_add(&path->list_source, &src->sinks);
277 path->name = dest->kcontrols[i].name;
278 dapm_set_path_status(dest, path, i);
285 /* update dapm codec register bits */
286 static int dapm_update_bits(struct snd_soc_dapm_widget *widget)
289 unsigned short old, new;
290 struct snd_soc_codec *codec = widget->codec;
292 /* check for valid widgets */
293 if (widget->reg < 0 || widget->id == snd_soc_dapm_input ||
294 widget->id == snd_soc_dapm_output ||
295 widget->id == snd_soc_dapm_hp ||
296 widget->id == snd_soc_dapm_mic ||
297 widget->id == snd_soc_dapm_line ||
298 widget->id == snd_soc_dapm_spk)
301 power = widget->power;
303 power = (power ? 0:1);
305 old = snd_soc_read(codec, widget->reg);
306 new = (old & ~(0x1 << widget->shift)) | (power << widget->shift);
310 pop_dbg(codec->pop_time, "pop test %s : %s in %d ms\n",
311 widget->name, widget->power ? "on" : "off",
313 snd_soc_write(codec, widget->reg, new);
314 pop_wait(codec->pop_time);
316 pr_debug("reg %x old %x new %x change %d\n", widget->reg,
321 /* ramps the volume up or down to minimise pops before or after a
322 * DAPM power event */
323 static int dapm_set_pga(struct snd_soc_dapm_widget *widget, int power)
325 const struct snd_kcontrol_new *k = widget->kcontrols;
327 if (widget->muted && !power)
329 if (!widget->muted && power)
332 if (widget->num_kcontrols && k) {
333 struct soc_mixer_control *mc =
334 (struct soc_mixer_control *)k->private_value;
335 unsigned int reg = mc->reg;
336 unsigned int shift = mc->shift;
338 unsigned int mask = (1 << fls(max)) - 1;
339 unsigned int invert = mc->invert;
343 /* power up has happended, increase volume to last level */
345 for (i = max; i > widget->saved_value; i--)
346 snd_soc_update_bits(widget->codec, reg, mask, i);
348 for (i = 0; i < widget->saved_value; i++)
349 snd_soc_update_bits(widget->codec, reg, mask, i);
353 /* power down is about to occur, decrease volume to mute */
354 int val = snd_soc_read(widget->codec, reg);
355 int i = widget->saved_value = (val >> shift) & mask;
357 for (; i < mask; i++)
358 snd_soc_update_bits(widget->codec, reg, mask, i);
361 snd_soc_update_bits(widget->codec, reg, mask, i);
369 /* create new dapm mixer control */
370 static int dapm_new_mixer(struct snd_soc_codec *codec,
371 struct snd_soc_dapm_widget *w)
375 struct snd_soc_dapm_path *path;
378 for (i = 0; i < w->num_kcontrols; i++) {
381 list_for_each_entry(path, &w->sources, list_sink) {
383 /* mixer/mux paths name must match control name */
384 if (path->name != (char*)w->kcontrols[i].name)
387 /* add dapm control with long name.
388 * for dapm_mixer this is the concatenation of the
389 * mixer and kcontrol name.
390 * for dapm_mixer_named_ctl this is simply the
393 name_len = strlen(w->kcontrols[i].name) + 1;
394 if (w->id != snd_soc_dapm_mixer_named_ctl)
395 name_len += 1 + strlen(w->name);
397 path->long_name = kmalloc(name_len, GFP_KERNEL);
399 if (path->long_name == NULL)
404 snprintf(path->long_name, name_len, "%s %s",
405 w->name, w->kcontrols[i].name);
407 case snd_soc_dapm_mixer_named_ctl:
408 snprintf(path->long_name, name_len, "%s",
409 w->kcontrols[i].name);
413 path->long_name[name_len - 1] = '\0';
415 path->kcontrol = snd_soc_cnew(&w->kcontrols[i], w,
417 ret = snd_ctl_add(codec->card, path->kcontrol);
419 printk(KERN_ERR "asoc: failed to add dapm kcontrol %s: %d\n",
422 kfree(path->long_name);
423 path->long_name = NULL;
431 /* create new dapm mux control */
432 static int dapm_new_mux(struct snd_soc_codec *codec,
433 struct snd_soc_dapm_widget *w)
435 struct snd_soc_dapm_path *path = NULL;
436 struct snd_kcontrol *kcontrol;
439 if (!w->num_kcontrols) {
440 printk(KERN_ERR "asoc: mux %s has no controls\n", w->name);
444 kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name);
445 ret = snd_ctl_add(codec->card, kcontrol);
449 list_for_each_entry(path, &w->sources, list_sink)
450 path->kcontrol = kcontrol;
455 printk(KERN_ERR "asoc: failed to add kcontrol %s\n", w->name);
459 /* create new dapm volume control */
460 static int dapm_new_pga(struct snd_soc_codec *codec,
461 struct snd_soc_dapm_widget *w)
463 struct snd_kcontrol *kcontrol;
466 if (!w->num_kcontrols)
469 kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name);
470 ret = snd_ctl_add(codec->card, kcontrol);
472 printk(KERN_ERR "asoc: failed to add kcontrol %s\n", w->name);
479 /* reset 'walked' bit for each dapm path */
480 static inline void dapm_clear_walk(struct snd_soc_codec *codec)
482 struct snd_soc_dapm_path *p;
484 list_for_each_entry(p, &codec->dapm_paths, list)
489 * Recursively check for a completed path to an active or physically connected
490 * output widget. Returns number of complete paths.
492 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
494 struct snd_soc_dapm_path *path;
497 if (widget->id == snd_soc_dapm_supply)
500 if (widget->id == snd_soc_dapm_adc && widget->active)
503 if (widget->connected) {
504 /* connected pin ? */
505 if (widget->id == snd_soc_dapm_output && !widget->ext)
508 /* connected jack or spk ? */
509 if (widget->id == snd_soc_dapm_hp || widget->id == snd_soc_dapm_spk ||
510 widget->id == snd_soc_dapm_line)
514 list_for_each_entry(path, &widget->sinks, list_source) {
518 if (path->sink && path->connect) {
520 con += is_connected_output_ep(path->sink);
528 * Recursively check for a completed path to an active or physically connected
529 * input widget. Returns number of complete paths.
531 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
533 struct snd_soc_dapm_path *path;
536 if (widget->id == snd_soc_dapm_supply)
539 /* active stream ? */
540 if (widget->id == snd_soc_dapm_dac && widget->active)
543 if (widget->connected) {
544 /* connected pin ? */
545 if (widget->id == snd_soc_dapm_input && !widget->ext)
548 /* connected VMID/Bias for lower pops */
549 if (widget->id == snd_soc_dapm_vmid)
552 /* connected jack ? */
553 if (widget->id == snd_soc_dapm_mic || widget->id == snd_soc_dapm_line)
557 list_for_each_entry(path, &widget->sources, list_sink) {
561 if (path->source && path->connect) {
563 con += is_connected_input_ep(path->source);
571 * Handler for generic register modifier widget.
573 int dapm_reg_event(struct snd_soc_dapm_widget *w,
574 struct snd_kcontrol *kcontrol, int event)
578 if (SND_SOC_DAPM_EVENT_ON(event))
583 snd_soc_update_bits(w->codec, -(w->reg + 1),
584 w->mask << w->shift, val << w->shift);
588 EXPORT_SYMBOL_GPL(dapm_reg_event);
590 /* Standard power change method, used to apply power changes to most
593 static int dapm_generic_apply_power(struct snd_soc_dapm_widget *w)
597 /* call any power change event handlers */
599 pr_debug("power %s event for %s flags %x\n",
600 w->power ? "on" : "off",
601 w->name, w->event_flags);
603 /* power up pre event */
604 if (w->power && w->event &&
605 (w->event_flags & SND_SOC_DAPM_PRE_PMU)) {
606 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMU);
611 /* power down pre event */
612 if (!w->power && w->event &&
613 (w->event_flags & SND_SOC_DAPM_PRE_PMD)) {
614 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMD);
619 /* Lower PGA volume to reduce pops */
620 if (w->id == snd_soc_dapm_pga && !w->power)
621 dapm_set_pga(w, w->power);
625 /* Raise PGA volume to reduce pops */
626 if (w->id == snd_soc_dapm_pga && w->power)
627 dapm_set_pga(w, w->power);
629 /* power up post event */
630 if (w->power && w->event &&
631 (w->event_flags & SND_SOC_DAPM_POST_PMU)) {
633 NULL, SND_SOC_DAPM_POST_PMU);
638 /* power down post event */
639 if (!w->power && w->event &&
640 (w->event_flags & SND_SOC_DAPM_POST_PMD)) {
641 ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMD);
649 /* Generic check to see if a widget should be powered.
651 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
655 in = is_connected_input_ep(w);
656 dapm_clear_walk(w->codec);
657 out = is_connected_output_ep(w);
658 dapm_clear_walk(w->codec);
659 return out != 0 && in != 0;
662 /* Check to see if an ADC has power */
663 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
668 in = is_connected_input_ep(w);
669 dapm_clear_walk(w->codec);
672 return dapm_generic_check_power(w);
676 /* Check to see if a DAC has power */
677 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
682 out = is_connected_output_ep(w);
683 dapm_clear_walk(w->codec);
686 return dapm_generic_check_power(w);
690 /* Check to see if a power supply is needed */
691 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
693 struct snd_soc_dapm_path *path;
696 /* Check if one of our outputs is connected */
697 list_for_each_entry(path, &w->sinks, list_source) {
698 if (path->sink && path->sink->power_check &&
699 path->sink->power_check(path->sink)) {
705 dapm_clear_walk(w->codec);
711 * Scan a single DAPM widget for a complete audio path and update the
712 * power status appropriately.
714 static int dapm_power_widget(struct snd_soc_codec *codec, int event,
715 struct snd_soc_dapm_widget *w)
720 case snd_soc_dapm_pre:
724 if (event == SND_SOC_DAPM_STREAM_START) {
726 NULL, SND_SOC_DAPM_PRE_PMU);
729 } else if (event == SND_SOC_DAPM_STREAM_STOP) {
731 NULL, SND_SOC_DAPM_PRE_PMD);
737 case snd_soc_dapm_post:
741 if (event == SND_SOC_DAPM_STREAM_START) {
743 NULL, SND_SOC_DAPM_POST_PMU);
746 } else if (event == SND_SOC_DAPM_STREAM_STOP) {
748 NULL, SND_SOC_DAPM_POST_PMD);
755 return dapm_generic_apply_power(w);
759 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
760 struct snd_soc_dapm_widget *b,
763 if (sort[a->id] != sort[b->id])
764 return sort[a->id] - sort[b->id];
769 /* Insert a widget in order into a DAPM power sequence. */
770 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
771 struct list_head *list,
774 struct snd_soc_dapm_widget *w;
776 list_for_each_entry(w, list, power_list)
777 if (dapm_seq_compare(new_widget, w, sort) < 0) {
778 list_add_tail(&new_widget->power_list, &w->power_list);
782 list_add_tail(&new_widget->power_list, list);
786 * Scan each dapm widget for complete audio path.
787 * A complete path is a route that has valid endpoints i.e.:-
789 * o DAC to output pin.
790 * o Input Pin to ADC.
791 * o Input pin to Output pin (bypass, sidetone)
792 * o DAC to ADC (loopback).
794 static int dapm_power_widgets(struct snd_soc_codec *codec, int event)
796 struct snd_soc_device *socdev = codec->socdev;
797 struct snd_soc_dapm_widget *w;
802 INIT_LIST_HEAD(&codec->up_list);
803 INIT_LIST_HEAD(&codec->down_list);
805 /* Check which widgets we need to power and store them in
806 * lists indicating if they should be powered up or down.
808 list_for_each_entry(w, &codec->dapm_widgets, list) {
810 case snd_soc_dapm_pre:
811 dapm_seq_insert(w, &codec->down_list, dapm_down_seq);
813 case snd_soc_dapm_post:
814 dapm_seq_insert(w, &codec->up_list, dapm_up_seq);
821 power = w->power_check(w);
825 if (w->power == power)
829 dapm_seq_insert(w, &codec->up_list,
832 dapm_seq_insert(w, &codec->down_list,
840 /* If we're changing to all on or all off then prepare */
841 if ((sys_power && codec->bias_level == SND_SOC_BIAS_STANDBY) ||
842 (!sys_power && codec->bias_level == SND_SOC_BIAS_ON)) {
843 ret = snd_soc_dapm_set_bias_level(socdev,
844 SND_SOC_BIAS_PREPARE);
846 pr_err("Failed to prepare bias: %d\n", ret);
849 /* Power down widgets first; try to avoid amplifying pops. */
850 list_for_each_entry(w, &codec->down_list, power_list) {
851 ret = dapm_power_widget(codec, event, w);
853 pr_err("Failed to power down %s: %d\n",
858 list_for_each_entry(w, &codec->up_list, power_list) {
859 ret = dapm_power_widget(codec, event, w);
861 pr_err("Failed to power up %s: %d\n",
865 /* If we just powered the last thing off drop to standby bias */
866 if (codec->bias_level == SND_SOC_BIAS_PREPARE && !sys_power) {
867 ret = snd_soc_dapm_set_bias_level(socdev,
868 SND_SOC_BIAS_STANDBY);
870 pr_err("Failed to apply standby bias: %d\n", ret);
873 /* If we just powered up then move to active bias */
874 if (codec->bias_level == SND_SOC_BIAS_PREPARE && sys_power) {
875 ret = snd_soc_dapm_set_bias_level(socdev,
878 pr_err("Failed to apply active bias: %d\n", ret);
885 static void dbg_dump_dapm(struct snd_soc_codec* codec, const char *action)
887 struct snd_soc_dapm_widget *w;
888 struct snd_soc_dapm_path *p = NULL;
891 printk("DAPM %s %s\n", codec->name, action);
893 list_for_each_entry(w, &codec->dapm_widgets, list) {
895 /* only display widgets that effect routing */
897 case snd_soc_dapm_pre:
898 case snd_soc_dapm_post:
899 case snd_soc_dapm_vmid:
901 case snd_soc_dapm_mux:
902 case snd_soc_dapm_value_mux:
903 case snd_soc_dapm_output:
904 case snd_soc_dapm_input:
905 case snd_soc_dapm_switch:
906 case snd_soc_dapm_hp:
907 case snd_soc_dapm_mic:
908 case snd_soc_dapm_spk:
909 case snd_soc_dapm_line:
910 case snd_soc_dapm_micbias:
911 case snd_soc_dapm_dac:
912 case snd_soc_dapm_adc:
913 case snd_soc_dapm_pga:
914 case snd_soc_dapm_mixer:
915 case snd_soc_dapm_mixer_named_ctl:
916 case snd_soc_dapm_supply:
918 in = is_connected_input_ep(w);
919 dapm_clear_walk(w->codec);
920 out = is_connected_output_ep(w);
921 dapm_clear_walk(w->codec);
922 printk("%s: %s in %d out %d\n", w->name,
923 w->power ? "On":"Off",in, out);
925 list_for_each_entry(p, &w->sources, list_sink) {
927 printk(" in %s %s\n", p->name ? p->name : "static",
930 list_for_each_entry(p, &w->sinks, list_source) {
932 printk(" out %s %s\n", p->name ? p->name : "static",
942 /* test and update the power status of a mux widget */
943 static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
944 struct snd_kcontrol *kcontrol, int mask,
945 int mux, int val, struct soc_enum *e)
947 struct snd_soc_dapm_path *path;
950 if (widget->id != snd_soc_dapm_mux &&
951 widget->id != snd_soc_dapm_value_mux)
954 if (!snd_soc_test_bits(widget->codec, e->reg, mask, val))
957 /* find dapm widget path assoc with kcontrol */
958 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
959 if (path->kcontrol != kcontrol)
962 if (!path->name || !e->texts[mux])
966 /* we now need to match the string in the enum to the path */
967 if (!(strcmp(path->name, e->texts[mux])))
968 path->connect = 1; /* new connection */
970 path->connect = 0; /* old connection must be powered down */
974 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
975 dump_dapm(widget->codec, "mux power update");
981 /* test and update the power status of a mixer or switch widget */
982 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
983 struct snd_kcontrol *kcontrol, int reg,
984 int val_mask, int val, int invert)
986 struct snd_soc_dapm_path *path;
989 if (widget->id != snd_soc_dapm_mixer &&
990 widget->id != snd_soc_dapm_mixer_named_ctl &&
991 widget->id != snd_soc_dapm_switch)
994 if (!snd_soc_test_bits(widget->codec, reg, val_mask, val))
997 /* find dapm widget path assoc with kcontrol */
998 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
999 if (path->kcontrol != kcontrol)
1002 /* found, now check type */
1005 /* new connection */
1006 path->connect = invert ? 0:1;
1008 /* old connection must be powered down */
1009 path->connect = invert ? 1:0;
1014 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
1015 dump_dapm(widget->codec, "mixer power update");
1021 /* show dapm widget status in sys fs */
1022 static ssize_t dapm_widget_show(struct device *dev,
1023 struct device_attribute *attr, char *buf)
1025 struct snd_soc_device *devdata = dev_get_drvdata(dev);
1026 struct snd_soc_codec *codec = devdata->card->codec;
1027 struct snd_soc_dapm_widget *w;
1029 char *state = "not set";
1031 list_for_each_entry(w, &codec->dapm_widgets, list) {
1033 /* only display widgets that burnm power */
1035 case snd_soc_dapm_hp:
1036 case snd_soc_dapm_mic:
1037 case snd_soc_dapm_spk:
1038 case snd_soc_dapm_line:
1039 case snd_soc_dapm_micbias:
1040 case snd_soc_dapm_dac:
1041 case snd_soc_dapm_adc:
1042 case snd_soc_dapm_pga:
1043 case snd_soc_dapm_mixer:
1044 case snd_soc_dapm_mixer_named_ctl:
1045 case snd_soc_dapm_supply:
1047 count += sprintf(buf + count, "%s: %s\n",
1048 w->name, w->power ? "On":"Off");
1055 switch (codec->bias_level) {
1056 case SND_SOC_BIAS_ON:
1059 case SND_SOC_BIAS_PREPARE:
1062 case SND_SOC_BIAS_STANDBY:
1065 case SND_SOC_BIAS_OFF:
1069 count += sprintf(buf + count, "PM State: %s\n", state);
1074 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
1076 int snd_soc_dapm_sys_add(struct device *dev)
1078 return device_create_file(dev, &dev_attr_dapm_widget);
1081 static void snd_soc_dapm_sys_remove(struct device *dev)
1083 device_remove_file(dev, &dev_attr_dapm_widget);
1086 /* free all dapm widgets and resources */
1087 static void dapm_free_widgets(struct snd_soc_codec *codec)
1089 struct snd_soc_dapm_widget *w, *next_w;
1090 struct snd_soc_dapm_path *p, *next_p;
1092 list_for_each_entry_safe(w, next_w, &codec->dapm_widgets, list) {
1097 list_for_each_entry_safe(p, next_p, &codec->dapm_paths, list) {
1099 kfree(p->long_name);
1104 static int snd_soc_dapm_set_pin(struct snd_soc_codec *codec,
1105 const char *pin, int status)
1107 struct snd_soc_dapm_widget *w;
1109 list_for_each_entry(w, &codec->dapm_widgets, list) {
1110 if (!strcmp(w->name, pin)) {
1111 pr_debug("dapm: %s: pin %s\n", codec->name, pin);
1112 w->connected = status;
1117 pr_err("dapm: %s: configuring unknown pin %s\n", codec->name, pin);
1122 * snd_soc_dapm_sync - scan and power dapm paths
1123 * @codec: audio codec
1125 * Walks all dapm audio paths and powers widgets according to their
1126 * stream or path usage.
1128 * Returns 0 for success.
1130 int snd_soc_dapm_sync(struct snd_soc_codec *codec)
1132 int ret = dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
1133 dump_dapm(codec, "sync");
1136 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
1138 static int snd_soc_dapm_add_route(struct snd_soc_codec *codec,
1139 const char *sink, const char *control, const char *source)
1141 struct snd_soc_dapm_path *path;
1142 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
1145 /* find src and dest widgets */
1146 list_for_each_entry(w, &codec->dapm_widgets, list) {
1148 if (!wsink && !(strcmp(w->name, sink))) {
1152 if (!wsource && !(strcmp(w->name, source))) {
1157 if (wsource == NULL || wsink == NULL)
1160 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
1164 path->source = wsource;
1166 INIT_LIST_HEAD(&path->list);
1167 INIT_LIST_HEAD(&path->list_source);
1168 INIT_LIST_HEAD(&path->list_sink);
1170 /* check for external widgets */
1171 if (wsink->id == snd_soc_dapm_input) {
1172 if (wsource->id == snd_soc_dapm_micbias ||
1173 wsource->id == snd_soc_dapm_mic ||
1174 wsink->id == snd_soc_dapm_line ||
1175 wsink->id == snd_soc_dapm_output)
1178 if (wsource->id == snd_soc_dapm_output) {
1179 if (wsink->id == snd_soc_dapm_spk ||
1180 wsink->id == snd_soc_dapm_hp ||
1181 wsink->id == snd_soc_dapm_line ||
1182 wsink->id == snd_soc_dapm_input)
1186 /* connect static paths */
1187 if (control == NULL) {
1188 list_add(&path->list, &codec->dapm_paths);
1189 list_add(&path->list_sink, &wsink->sources);
1190 list_add(&path->list_source, &wsource->sinks);
1195 /* connect dynamic paths */
1197 case snd_soc_dapm_adc:
1198 case snd_soc_dapm_dac:
1199 case snd_soc_dapm_pga:
1200 case snd_soc_dapm_input:
1201 case snd_soc_dapm_output:
1202 case snd_soc_dapm_micbias:
1203 case snd_soc_dapm_vmid:
1204 case snd_soc_dapm_pre:
1205 case snd_soc_dapm_post:
1206 case snd_soc_dapm_supply:
1207 list_add(&path->list, &codec->dapm_paths);
1208 list_add(&path->list_sink, &wsink->sources);
1209 list_add(&path->list_source, &wsource->sinks);
1212 case snd_soc_dapm_mux:
1213 case snd_soc_dapm_value_mux:
1214 ret = dapm_connect_mux(codec, wsource, wsink, path, control,
1215 &wsink->kcontrols[0]);
1219 case snd_soc_dapm_switch:
1220 case snd_soc_dapm_mixer:
1221 case snd_soc_dapm_mixer_named_ctl:
1222 ret = dapm_connect_mixer(codec, wsource, wsink, path, control);
1226 case snd_soc_dapm_hp:
1227 case snd_soc_dapm_mic:
1228 case snd_soc_dapm_line:
1229 case snd_soc_dapm_spk:
1230 list_add(&path->list, &codec->dapm_paths);
1231 list_add(&path->list_sink, &wsink->sources);
1232 list_add(&path->list_source, &wsource->sinks);
1239 printk(KERN_WARNING "asoc: no dapm match for %s --> %s --> %s\n", source,
1246 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1248 * @route: audio routes
1249 * @num: number of routes
1251 * Connects 2 dapm widgets together via a named audio path. The sink is
1252 * the widget receiving the audio signal, whilst the source is the sender
1253 * of the audio signal.
1255 * Returns 0 for success else error. On error all resources can be freed
1256 * with a call to snd_soc_card_free().
1258 int snd_soc_dapm_add_routes(struct snd_soc_codec *codec,
1259 const struct snd_soc_dapm_route *route, int num)
1263 for (i = 0; i < num; i++) {
1264 ret = snd_soc_dapm_add_route(codec, route->sink,
1265 route->control, route->source);
1267 printk(KERN_ERR "Failed to add route %s->%s\n",
1277 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
1280 * snd_soc_dapm_new_widgets - add new dapm widgets
1281 * @codec: audio codec
1283 * Checks the codec for any new dapm widgets and creates them if found.
1285 * Returns 0 for success.
1287 int snd_soc_dapm_new_widgets(struct snd_soc_codec *codec)
1289 struct snd_soc_dapm_widget *w;
1291 list_for_each_entry(w, &codec->dapm_widgets, list)
1297 case snd_soc_dapm_switch:
1298 case snd_soc_dapm_mixer:
1299 case snd_soc_dapm_mixer_named_ctl:
1300 w->power_check = dapm_generic_check_power;
1301 dapm_new_mixer(codec, w);
1303 case snd_soc_dapm_mux:
1304 case snd_soc_dapm_value_mux:
1305 w->power_check = dapm_generic_check_power;
1306 dapm_new_mux(codec, w);
1308 case snd_soc_dapm_adc:
1309 w->power_check = dapm_adc_check_power;
1311 case snd_soc_dapm_dac:
1312 w->power_check = dapm_dac_check_power;
1314 case snd_soc_dapm_pga:
1315 w->power_check = dapm_generic_check_power;
1316 dapm_new_pga(codec, w);
1318 case snd_soc_dapm_input:
1319 case snd_soc_dapm_output:
1320 case snd_soc_dapm_micbias:
1321 case snd_soc_dapm_spk:
1322 case snd_soc_dapm_hp:
1323 case snd_soc_dapm_mic:
1324 case snd_soc_dapm_line:
1325 w->power_check = dapm_generic_check_power;
1327 case snd_soc_dapm_supply:
1328 w->power_check = dapm_supply_check_power;
1329 case snd_soc_dapm_vmid:
1330 case snd_soc_dapm_pre:
1331 case snd_soc_dapm_post:
1337 dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
1340 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
1343 * snd_soc_dapm_get_volsw - dapm mixer get callback
1344 * @kcontrol: mixer control
1345 * @ucontrol: control element information
1347 * Callback to get the value of a dapm mixer control.
1349 * Returns 0 for success.
1351 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
1352 struct snd_ctl_elem_value *ucontrol)
1354 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1355 struct soc_mixer_control *mc =
1356 (struct soc_mixer_control *)kcontrol->private_value;
1357 unsigned int reg = mc->reg;
1358 unsigned int shift = mc->shift;
1359 unsigned int rshift = mc->rshift;
1361 unsigned int invert = mc->invert;
1362 unsigned int mask = (1 << fls(max)) - 1;
1364 /* return the saved value if we are powered down */
1365 if (widget->id == snd_soc_dapm_pga && !widget->power) {
1366 ucontrol->value.integer.value[0] = widget->saved_value;
1370 ucontrol->value.integer.value[0] =
1371 (snd_soc_read(widget->codec, reg) >> shift) & mask;
1372 if (shift != rshift)
1373 ucontrol->value.integer.value[1] =
1374 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
1376 ucontrol->value.integer.value[0] =
1377 max - ucontrol->value.integer.value[0];
1378 if (shift != rshift)
1379 ucontrol->value.integer.value[1] =
1380 max - ucontrol->value.integer.value[1];
1385 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
1388 * snd_soc_dapm_put_volsw - dapm mixer set callback
1389 * @kcontrol: mixer control
1390 * @ucontrol: control element information
1392 * Callback to set the value of a dapm mixer control.
1394 * Returns 0 for success.
1396 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
1397 struct snd_ctl_elem_value *ucontrol)
1399 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1400 struct soc_mixer_control *mc =
1401 (struct soc_mixer_control *)kcontrol->private_value;
1402 unsigned int reg = mc->reg;
1403 unsigned int shift = mc->shift;
1404 unsigned int rshift = mc->rshift;
1406 unsigned int mask = (1 << fls(max)) - 1;
1407 unsigned int invert = mc->invert;
1408 unsigned short val, val2, val_mask;
1411 val = (ucontrol->value.integer.value[0] & mask);
1415 val_mask = mask << shift;
1417 if (shift != rshift) {
1418 val2 = (ucontrol->value.integer.value[1] & mask);
1421 val_mask |= mask << rshift;
1422 val |= val2 << rshift;
1425 mutex_lock(&widget->codec->mutex);
1426 widget->value = val;
1428 /* save volume value if the widget is powered down */
1429 if (widget->id == snd_soc_dapm_pga && !widget->power) {
1430 widget->saved_value = val;
1431 mutex_unlock(&widget->codec->mutex);
1435 dapm_mixer_update_power(widget, kcontrol, reg, val_mask, val, invert);
1436 if (widget->event) {
1437 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1438 ret = widget->event(widget, kcontrol,
1439 SND_SOC_DAPM_PRE_REG);
1445 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1446 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1447 ret = widget->event(widget, kcontrol,
1448 SND_SOC_DAPM_POST_REG);
1450 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1453 mutex_unlock(&widget->codec->mutex);
1456 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
1459 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
1460 * @kcontrol: mixer control
1461 * @ucontrol: control element information
1463 * Callback to get the value of a dapm enumerated double mixer control.
1465 * Returns 0 for success.
1467 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
1468 struct snd_ctl_elem_value *ucontrol)
1470 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1471 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1472 unsigned short val, bitmask;
1474 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1476 val = snd_soc_read(widget->codec, e->reg);
1477 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
1478 if (e->shift_l != e->shift_r)
1479 ucontrol->value.enumerated.item[1] =
1480 (val >> e->shift_r) & (bitmask - 1);
1484 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
1487 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
1488 * @kcontrol: mixer control
1489 * @ucontrol: control element information
1491 * Callback to set the value of a dapm enumerated double mixer control.
1493 * Returns 0 for success.
1495 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
1496 struct snd_ctl_elem_value *ucontrol)
1498 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1499 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1500 unsigned short val, mux;
1501 unsigned short mask, bitmask;
1504 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1506 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1508 mux = ucontrol->value.enumerated.item[0];
1509 val = mux << e->shift_l;
1510 mask = (bitmask - 1) << e->shift_l;
1511 if (e->shift_l != e->shift_r) {
1512 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1514 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
1515 mask |= (bitmask - 1) << e->shift_r;
1518 mutex_lock(&widget->codec->mutex);
1519 widget->value = val;
1520 dapm_mux_update_power(widget, kcontrol, mask, mux, val, e);
1521 if (widget->event) {
1522 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1523 ret = widget->event(widget,
1524 kcontrol, SND_SOC_DAPM_PRE_REG);
1528 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1529 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1530 ret = widget->event(widget,
1531 kcontrol, SND_SOC_DAPM_POST_REG);
1533 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1536 mutex_unlock(&widget->codec->mutex);
1539 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
1542 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
1544 * @kcontrol: mixer control
1545 * @ucontrol: control element information
1547 * Callback to get the value of a dapm semi enumerated double mixer control.
1549 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1550 * used for handling bitfield coded enumeration for example.
1552 * Returns 0 for success.
1554 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
1555 struct snd_ctl_elem_value *ucontrol)
1557 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1558 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1559 unsigned short reg_val, val, mux;
1561 reg_val = snd_soc_read(widget->codec, e->reg);
1562 val = (reg_val >> e->shift_l) & e->mask;
1563 for (mux = 0; mux < e->max; mux++) {
1564 if (val == e->values[mux])
1567 ucontrol->value.enumerated.item[0] = mux;
1568 if (e->shift_l != e->shift_r) {
1569 val = (reg_val >> e->shift_r) & e->mask;
1570 for (mux = 0; mux < e->max; mux++) {
1571 if (val == e->values[mux])
1574 ucontrol->value.enumerated.item[1] = mux;
1579 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
1582 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
1584 * @kcontrol: mixer control
1585 * @ucontrol: control element information
1587 * Callback to set the value of a dapm semi enumerated double mixer control.
1589 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1590 * used for handling bitfield coded enumeration for example.
1592 * Returns 0 for success.
1594 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
1595 struct snd_ctl_elem_value *ucontrol)
1597 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1598 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1599 unsigned short val, mux;
1600 unsigned short mask;
1603 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1605 mux = ucontrol->value.enumerated.item[0];
1606 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
1607 mask = e->mask << e->shift_l;
1608 if (e->shift_l != e->shift_r) {
1609 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1611 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
1612 mask |= e->mask << e->shift_r;
1615 mutex_lock(&widget->codec->mutex);
1616 widget->value = val;
1617 dapm_mux_update_power(widget, kcontrol, mask, mux, val, e);
1618 if (widget->event) {
1619 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1620 ret = widget->event(widget,
1621 kcontrol, SND_SOC_DAPM_PRE_REG);
1625 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1626 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1627 ret = widget->event(widget,
1628 kcontrol, SND_SOC_DAPM_POST_REG);
1630 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1633 mutex_unlock(&widget->codec->mutex);
1636 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
1639 * snd_soc_dapm_info_pin_switch - Info for a pin switch
1641 * @kcontrol: mixer control
1642 * @uinfo: control element information
1644 * Callback to provide information about a pin switch control.
1646 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
1647 struct snd_ctl_elem_info *uinfo)
1649 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1651 uinfo->value.integer.min = 0;
1652 uinfo->value.integer.max = 1;
1656 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
1659 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
1661 * @kcontrol: mixer control
1664 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
1665 struct snd_ctl_elem_value *ucontrol)
1667 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1668 const char *pin = (const char *)kcontrol->private_value;
1670 mutex_lock(&codec->mutex);
1672 ucontrol->value.integer.value[0] =
1673 snd_soc_dapm_get_pin_status(codec, pin);
1675 mutex_unlock(&codec->mutex);
1679 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
1682 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
1684 * @kcontrol: mixer control
1687 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
1688 struct snd_ctl_elem_value *ucontrol)
1690 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1691 const char *pin = (const char *)kcontrol->private_value;
1693 mutex_lock(&codec->mutex);
1695 if (ucontrol->value.integer.value[0])
1696 snd_soc_dapm_enable_pin(codec, pin);
1698 snd_soc_dapm_disable_pin(codec, pin);
1700 snd_soc_dapm_sync(codec);
1702 mutex_unlock(&codec->mutex);
1706 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
1709 * snd_soc_dapm_new_control - create new dapm control
1710 * @codec: audio codec
1711 * @widget: widget template
1713 * Creates a new dapm control based upon the template.
1715 * Returns 0 for success else error.
1717 int snd_soc_dapm_new_control(struct snd_soc_codec *codec,
1718 const struct snd_soc_dapm_widget *widget)
1720 struct snd_soc_dapm_widget *w;
1722 if ((w = dapm_cnew_widget(widget)) == NULL)
1726 INIT_LIST_HEAD(&w->sources);
1727 INIT_LIST_HEAD(&w->sinks);
1728 INIT_LIST_HEAD(&w->list);
1729 list_add(&w->list, &codec->dapm_widgets);
1731 /* machine layer set ups unconnected pins and insertions */
1735 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
1738 * snd_soc_dapm_new_controls - create new dapm controls
1739 * @codec: audio codec
1740 * @widget: widget array
1741 * @num: number of widgets
1743 * Creates new DAPM controls based upon the templates.
1745 * Returns 0 for success else error.
1747 int snd_soc_dapm_new_controls(struct snd_soc_codec *codec,
1748 const struct snd_soc_dapm_widget *widget,
1753 for (i = 0; i < num; i++) {
1754 ret = snd_soc_dapm_new_control(codec, widget);
1757 "ASoC: Failed to create DAPM control %s: %d\n",
1765 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
1769 * snd_soc_dapm_stream_event - send a stream event to the dapm core
1770 * @codec: audio codec
1771 * @stream: stream name
1772 * @event: stream event
1774 * Sends a stream event to the dapm core. The core then makes any
1775 * necessary widget power changes.
1777 * Returns 0 for success else error.
1779 int snd_soc_dapm_stream_event(struct snd_soc_codec *codec,
1780 char *stream, int event)
1782 struct snd_soc_dapm_widget *w;
1787 mutex_lock(&codec->mutex);
1788 list_for_each_entry(w, &codec->dapm_widgets, list)
1792 pr_debug("widget %s\n %s stream %s event %d\n",
1793 w->name, w->sname, stream, event);
1794 if (strstr(w->sname, stream)) {
1796 case SND_SOC_DAPM_STREAM_START:
1799 case SND_SOC_DAPM_STREAM_STOP:
1802 case SND_SOC_DAPM_STREAM_SUSPEND:
1807 case SND_SOC_DAPM_STREAM_RESUME:
1813 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
1815 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
1820 mutex_unlock(&codec->mutex);
1822 dapm_power_widgets(codec, event);
1823 dump_dapm(codec, __func__);
1826 EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event);
1829 * snd_soc_dapm_enable_pin - enable pin.
1833 * Enables input/output pin and its parents or children widgets iff there is
1834 * a valid audio route and active audio stream.
1835 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1836 * do any widget power switching.
1838 int snd_soc_dapm_enable_pin(struct snd_soc_codec *codec, const char *pin)
1840 return snd_soc_dapm_set_pin(codec, pin, 1);
1842 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
1845 * snd_soc_dapm_disable_pin - disable pin.
1849 * Disables input/output pin and its parents or children widgets.
1850 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1851 * do any widget power switching.
1853 int snd_soc_dapm_disable_pin(struct snd_soc_codec *codec, const char *pin)
1855 return snd_soc_dapm_set_pin(codec, pin, 0);
1857 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
1860 * snd_soc_dapm_nc_pin - permanently disable pin.
1864 * Marks the specified pin as being not connected, disabling it along
1865 * any parent or child widgets. At present this is identical to
1866 * snd_soc_dapm_disable_pin() but in future it will be extended to do
1867 * additional things such as disabling controls which only affect
1868 * paths through the pin.
1870 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1871 * do any widget power switching.
1873 int snd_soc_dapm_nc_pin(struct snd_soc_codec *codec, const char *pin)
1875 return snd_soc_dapm_set_pin(codec, pin, 0);
1877 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
1880 * snd_soc_dapm_get_pin_status - get audio pin status
1881 * @codec: audio codec
1882 * @pin: audio signal pin endpoint (or start point)
1884 * Get audio pin status - connected or disconnected.
1886 * Returns 1 for connected otherwise 0.
1888 int snd_soc_dapm_get_pin_status(struct snd_soc_codec *codec, const char *pin)
1890 struct snd_soc_dapm_widget *w;
1892 list_for_each_entry(w, &codec->dapm_widgets, list) {
1893 if (!strcmp(w->name, pin))
1894 return w->connected;
1899 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
1902 * snd_soc_dapm_free - free dapm resources
1903 * @socdev: SoC device
1905 * Free all dapm widgets and resources.
1907 void snd_soc_dapm_free(struct snd_soc_device *socdev)
1909 struct snd_soc_codec *codec = socdev->card->codec;
1911 snd_soc_dapm_sys_remove(socdev->dev);
1912 dapm_free_widgets(codec);
1914 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
1916 /* Module information */
1917 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
1918 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
1919 MODULE_LICENSE("GPL");