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_pga
, snd_soc_dapm_adc
, snd_soc_dapm_hp
,
58 snd_soc_dapm_spk
, snd_soc_dapm_post
60 static int dapm_down_seq
[] = {
61 snd_soc_dapm_pre
, snd_soc_dapm_adc
, snd_soc_dapm_hp
, snd_soc_dapm_spk
,
62 snd_soc_dapm_pga
, snd_soc_dapm_mixer
, snd_soc_dapm_dac
, snd_soc_dapm_mic
,
63 snd_soc_dapm_micbias
, snd_soc_dapm_mux
, snd_soc_dapm_value_mux
,
67 static int dapm_status
= 1;
68 module_param(dapm_status
, int, 0);
69 MODULE_PARM_DESC(dapm_status
, "enable DPM sysfs entries");
71 static void pop_wait(u32 pop_time
)
74 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time
));
77 static void pop_dbg(u32 pop_time
, const char *fmt
, ...)
91 /* create a new dapm widget */
92 static inline struct snd_soc_dapm_widget
*dapm_cnew_widget(
93 const struct snd_soc_dapm_widget
*_widget
)
95 return kmemdup(_widget
, sizeof(*_widget
), GFP_KERNEL
);
98 /* set up initial codec paths */
99 static void dapm_set_path_status(struct snd_soc_dapm_widget
*w
,
100 struct snd_soc_dapm_path
*p
, int i
)
103 case snd_soc_dapm_switch
:
104 case snd_soc_dapm_mixer
: {
106 struct soc_mixer_control
*mc
= (struct soc_mixer_control
*)
107 w
->kcontrols
[i
].private_value
;
108 unsigned int reg
= mc
->reg
;
109 unsigned int shift
= mc
->shift
;
111 unsigned int mask
= (1 << fls(max
)) - 1;
112 unsigned int invert
= mc
->invert
;
114 val
= snd_soc_read(w
->codec
, reg
);
115 val
= (val
>> shift
) & mask
;
117 if ((invert
&& !val
) || (!invert
&& val
))
123 case snd_soc_dapm_mux
: {
124 struct soc_enum
*e
= (struct soc_enum
*)w
->kcontrols
[i
].private_value
;
125 int val
, item
, bitmask
;
127 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
129 val
= snd_soc_read(w
->codec
, e
->reg
);
130 item
= (val
>> e
->shift_l
) & (bitmask
- 1);
133 for (i
= 0; i
< e
->max
; i
++) {
134 if (!(strcmp(p
->name
, e
->texts
[i
])) && item
== i
)
139 case snd_soc_dapm_value_mux
: {
140 struct soc_enum
*e
= (struct soc_enum
*)
141 w
->kcontrols
[i
].private_value
;
144 val
= snd_soc_read(w
->codec
, e
->reg
);
145 val
= (val
>> e
->shift_l
) & e
->mask
;
146 for (item
= 0; item
< e
->max
; item
++) {
147 if (val
== e
->values
[item
])
152 for (i
= 0; i
< e
->max
; i
++) {
153 if (!(strcmp(p
->name
, e
->texts
[i
])) && item
== i
)
158 /* does not effect routing - always connected */
159 case snd_soc_dapm_pga
:
160 case snd_soc_dapm_output
:
161 case snd_soc_dapm_adc
:
162 case snd_soc_dapm_input
:
163 case snd_soc_dapm_dac
:
164 case snd_soc_dapm_micbias
:
165 case snd_soc_dapm_vmid
:
168 /* does effect routing - dynamically connected */
169 case snd_soc_dapm_hp
:
170 case snd_soc_dapm_mic
:
171 case snd_soc_dapm_spk
:
172 case snd_soc_dapm_line
:
173 case snd_soc_dapm_pre
:
174 case snd_soc_dapm_post
:
180 /* connect mux widget to it's interconnecting audio paths */
181 static int dapm_connect_mux(struct snd_soc_codec
*codec
,
182 struct snd_soc_dapm_widget
*src
, struct snd_soc_dapm_widget
*dest
,
183 struct snd_soc_dapm_path
*path
, const char *control_name
,
184 const struct snd_kcontrol_new
*kcontrol
)
186 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
189 for (i
= 0; i
< e
->max
; i
++) {
190 if (!(strcmp(control_name
, e
->texts
[i
]))) {
191 list_add(&path
->list
, &codec
->dapm_paths
);
192 list_add(&path
->list_sink
, &dest
->sources
);
193 list_add(&path
->list_source
, &src
->sinks
);
194 path
->name
= (char*)e
->texts
[i
];
195 dapm_set_path_status(dest
, path
, 0);
203 /* connect mixer widget to it's interconnecting audio paths */
204 static int dapm_connect_mixer(struct snd_soc_codec
*codec
,
205 struct snd_soc_dapm_widget
*src
, struct snd_soc_dapm_widget
*dest
,
206 struct snd_soc_dapm_path
*path
, const char *control_name
)
210 /* search for mixer kcontrol */
211 for (i
= 0; i
< dest
->num_kcontrols
; i
++) {
212 if (!strcmp(control_name
, dest
->kcontrols
[i
].name
)) {
213 list_add(&path
->list
, &codec
->dapm_paths
);
214 list_add(&path
->list_sink
, &dest
->sources
);
215 list_add(&path
->list_source
, &src
->sinks
);
216 path
->name
= dest
->kcontrols
[i
].name
;
217 dapm_set_path_status(dest
, path
, i
);
224 /* update dapm codec register bits */
225 static int dapm_update_bits(struct snd_soc_dapm_widget
*widget
)
228 unsigned short old
, new;
229 struct snd_soc_codec
*codec
= widget
->codec
;
231 /* check for valid widgets */
232 if (widget
->reg
< 0 || widget
->id
== snd_soc_dapm_input
||
233 widget
->id
== snd_soc_dapm_output
||
234 widget
->id
== snd_soc_dapm_hp
||
235 widget
->id
== snd_soc_dapm_mic
||
236 widget
->id
== snd_soc_dapm_line
||
237 widget
->id
== snd_soc_dapm_spk
)
240 power
= widget
->power
;
242 power
= (power
? 0:1);
244 old
= snd_soc_read(codec
, widget
->reg
);
245 new = (old
& ~(0x1 << widget
->shift
)) | (power
<< widget
->shift
);
249 pop_dbg(codec
->pop_time
, "pop test %s : %s in %d ms\n",
250 widget
->name
, widget
->power
? "on" : "off",
252 snd_soc_write(codec
, widget
->reg
, new);
253 pop_wait(codec
->pop_time
);
255 pr_debug("reg %x old %x new %x change %d\n", widget
->reg
,
260 /* ramps the volume up or down to minimise pops before or after a
261 * DAPM power event */
262 static int dapm_set_pga(struct snd_soc_dapm_widget
*widget
, int power
)
264 const struct snd_kcontrol_new
*k
= widget
->kcontrols
;
266 if (widget
->muted
&& !power
)
268 if (!widget
->muted
&& power
)
271 if (widget
->num_kcontrols
&& k
) {
272 struct soc_mixer_control
*mc
=
273 (struct soc_mixer_control
*)k
->private_value
;
274 unsigned int reg
= mc
->reg
;
275 unsigned int shift
= mc
->shift
;
277 unsigned int mask
= (1 << fls(max
)) - 1;
278 unsigned int invert
= mc
->invert
;
282 /* power up has happended, increase volume to last level */
284 for (i
= max
; i
> widget
->saved_value
; i
--)
285 snd_soc_update_bits(widget
->codec
, reg
, mask
, i
);
287 for (i
= 0; i
< widget
->saved_value
; i
++)
288 snd_soc_update_bits(widget
->codec
, reg
, mask
, i
);
292 /* power down is about to occur, decrease volume to mute */
293 int val
= snd_soc_read(widget
->codec
, reg
);
294 int i
= widget
->saved_value
= (val
>> shift
) & mask
;
296 for (; i
< mask
; i
++)
297 snd_soc_update_bits(widget
->codec
, reg
, mask
, i
);
300 snd_soc_update_bits(widget
->codec
, reg
, mask
, i
);
308 /* create new dapm mixer control */
309 static int dapm_new_mixer(struct snd_soc_codec
*codec
,
310 struct snd_soc_dapm_widget
*w
)
314 struct snd_soc_dapm_path
*path
;
317 for (i
= 0; i
< w
->num_kcontrols
; i
++) {
320 list_for_each_entry(path
, &w
->sources
, list_sink
) {
322 /* mixer/mux paths name must match control name */
323 if (path
->name
!= (char*)w
->kcontrols
[i
].name
)
326 /* add dapm control with long name */
327 name_len
= 2 + strlen(w
->name
)
328 + strlen(w
->kcontrols
[i
].name
);
329 path
->long_name
= kmalloc(name_len
, GFP_KERNEL
);
330 if (path
->long_name
== NULL
)
333 snprintf(path
->long_name
, name_len
, "%s %s",
334 w
->name
, w
->kcontrols
[i
].name
);
335 path
->long_name
[name_len
- 1] = '\0';
337 path
->kcontrol
= snd_soc_cnew(&w
->kcontrols
[i
], w
,
339 ret
= snd_ctl_add(codec
->card
, path
->kcontrol
);
341 printk(KERN_ERR
"asoc: failed to add dapm kcontrol %s\n",
343 kfree(path
->long_name
);
344 path
->long_name
= NULL
;
352 /* create new dapm mux control */
353 static int dapm_new_mux(struct snd_soc_codec
*codec
,
354 struct snd_soc_dapm_widget
*w
)
356 struct snd_soc_dapm_path
*path
= NULL
;
357 struct snd_kcontrol
*kcontrol
;
360 if (!w
->num_kcontrols
) {
361 printk(KERN_ERR
"asoc: mux %s has no controls\n", w
->name
);
365 kcontrol
= snd_soc_cnew(&w
->kcontrols
[0], w
, w
->name
);
366 ret
= snd_ctl_add(codec
->card
, kcontrol
);
370 list_for_each_entry(path
, &w
->sources
, list_sink
)
371 path
->kcontrol
= kcontrol
;
376 printk(KERN_ERR
"asoc: failed to add kcontrol %s\n", w
->name
);
380 /* create new dapm volume control */
381 static int dapm_new_pga(struct snd_soc_codec
*codec
,
382 struct snd_soc_dapm_widget
*w
)
384 struct snd_kcontrol
*kcontrol
;
387 if (!w
->num_kcontrols
)
390 kcontrol
= snd_soc_cnew(&w
->kcontrols
[0], w
, w
->name
);
391 ret
= snd_ctl_add(codec
->card
, kcontrol
);
393 printk(KERN_ERR
"asoc: failed to add kcontrol %s\n", w
->name
);
400 /* reset 'walked' bit for each dapm path */
401 static inline void dapm_clear_walk(struct snd_soc_codec
*codec
)
403 struct snd_soc_dapm_path
*p
;
405 list_for_each_entry(p
, &codec
->dapm_paths
, list
)
410 * Recursively check for a completed path to an active or physically connected
411 * output widget. Returns number of complete paths.
413 static int is_connected_output_ep(struct snd_soc_dapm_widget
*widget
)
415 struct snd_soc_dapm_path
*path
;
418 if (widget
->id
== snd_soc_dapm_adc
&& widget
->active
)
421 if (widget
->connected
) {
422 /* connected pin ? */
423 if (widget
->id
== snd_soc_dapm_output
&& !widget
->ext
)
426 /* connected jack or spk ? */
427 if (widget
->id
== snd_soc_dapm_hp
|| widget
->id
== snd_soc_dapm_spk
||
428 widget
->id
== snd_soc_dapm_line
)
432 list_for_each_entry(path
, &widget
->sinks
, list_source
) {
436 if (path
->sink
&& path
->connect
) {
438 con
+= is_connected_output_ep(path
->sink
);
446 * Recursively check for a completed path to an active or physically connected
447 * input widget. Returns number of complete paths.
449 static int is_connected_input_ep(struct snd_soc_dapm_widget
*widget
)
451 struct snd_soc_dapm_path
*path
;
454 /* active stream ? */
455 if (widget
->id
== snd_soc_dapm_dac
&& widget
->active
)
458 if (widget
->connected
) {
459 /* connected pin ? */
460 if (widget
->id
== snd_soc_dapm_input
&& !widget
->ext
)
463 /* connected VMID/Bias for lower pops */
464 if (widget
->id
== snd_soc_dapm_vmid
)
467 /* connected jack ? */
468 if (widget
->id
== snd_soc_dapm_mic
|| widget
->id
== snd_soc_dapm_line
)
472 list_for_each_entry(path
, &widget
->sources
, list_sink
) {
476 if (path
->source
&& path
->connect
) {
478 con
+= is_connected_input_ep(path
->source
);
486 * Handler for generic register modifier widget.
488 int dapm_reg_event(struct snd_soc_dapm_widget
*w
,
489 struct snd_kcontrol
*kcontrol
, int event
)
493 if (SND_SOC_DAPM_EVENT_ON(event
))
498 snd_soc_update_bits(w
->codec
, -(w
->reg
+ 1),
499 w
->mask
<< w
->shift
, val
<< w
->shift
);
503 EXPORT_SYMBOL_GPL(dapm_reg_event
);
506 * Scan each dapm widget for complete audio path.
507 * A complete path is a route that has valid endpoints i.e.:-
509 * o DAC to output pin.
510 * o Input Pin to ADC.
511 * o Input pin to Output pin (bypass, sidetone)
512 * o DAC to ADC (loopback).
514 static int dapm_power_widgets(struct snd_soc_codec
*codec
, int event
)
516 struct snd_soc_dapm_widget
*w
;
517 int in
, out
, i
, c
= 1, *seq
= NULL
, ret
= 0, power_change
, power
;
519 /* do we have a sequenced stream event */
520 if (event
== SND_SOC_DAPM_STREAM_START
) {
521 c
= ARRAY_SIZE(dapm_up_seq
);
523 } else if (event
== SND_SOC_DAPM_STREAM_STOP
) {
524 c
= ARRAY_SIZE(dapm_down_seq
);
528 for(i
= 0; i
< c
; i
++) {
529 list_for_each_entry(w
, &codec
->dapm_widgets
, list
) {
531 /* is widget in stream order */
532 if (seq
&& seq
[i
] && w
->id
!= seq
[i
])
535 /* vmid - no action */
536 if (w
->id
== snd_soc_dapm_vmid
)
540 if (w
->id
== snd_soc_dapm_adc
&& w
->active
) {
541 in
= is_connected_input_ep(w
);
542 dapm_clear_walk(w
->codec
);
543 w
->power
= (in
!= 0) ? 1 : 0;
549 if (w
->id
== snd_soc_dapm_dac
&& w
->active
) {
550 out
= is_connected_output_ep(w
);
551 dapm_clear_walk(w
->codec
);
552 w
->power
= (out
!= 0) ? 1 : 0;
557 /* pre and post event widgets */
558 if (w
->id
== snd_soc_dapm_pre
) {
562 if (event
== SND_SOC_DAPM_STREAM_START
) {
564 NULL
, SND_SOC_DAPM_PRE_PMU
);
567 } else if (event
== SND_SOC_DAPM_STREAM_STOP
) {
569 NULL
, SND_SOC_DAPM_PRE_PMD
);
575 if (w
->id
== snd_soc_dapm_post
) {
579 if (event
== SND_SOC_DAPM_STREAM_START
) {
581 NULL
, SND_SOC_DAPM_POST_PMU
);
584 } else if (event
== SND_SOC_DAPM_STREAM_STOP
) {
586 NULL
, SND_SOC_DAPM_POST_PMD
);
593 /* all other widgets */
594 in
= is_connected_input_ep(w
);
595 dapm_clear_walk(w
->codec
);
596 out
= is_connected_output_ep(w
);
597 dapm_clear_walk(w
->codec
);
598 power
= (out
!= 0 && in
!= 0) ? 1 : 0;
599 power_change
= (w
->power
== power
) ? 0: 1;
605 /* call any power change event handlers */
607 pr_debug("power %s event for %s flags %x\n",
608 w
->power
? "on" : "off",
609 w
->name
, w
->event_flags
);
611 /* power up pre event */
612 if (power
&& w
->event
&&
613 (w
->event_flags
& SND_SOC_DAPM_PRE_PMU
)) {
614 ret
= w
->event(w
, NULL
, SND_SOC_DAPM_PRE_PMU
);
619 /* power down pre event */
620 if (!power
&& w
->event
&&
621 (w
->event_flags
& SND_SOC_DAPM_PRE_PMD
)) {
622 ret
= w
->event(w
, NULL
, SND_SOC_DAPM_PRE_PMD
);
627 /* Lower PGA volume to reduce pops */
628 if (w
->id
== snd_soc_dapm_pga
&& !power
)
629 dapm_set_pga(w
, power
);
633 /* Raise PGA volume to reduce pops */
634 if (w
->id
== snd_soc_dapm_pga
&& power
)
635 dapm_set_pga(w
, power
);
637 /* power up post event */
638 if (power
&& w
->event
&&
639 (w
->event_flags
& SND_SOC_DAPM_POST_PMU
)) {
641 NULL
, SND_SOC_DAPM_POST_PMU
);
646 /* power down post event */
647 if (!power
&& w
->event
&&
648 (w
->event_flags
& SND_SOC_DAPM_POST_PMD
)) {
649 ret
= w
->event(w
, NULL
, SND_SOC_DAPM_POST_PMD
);
660 static void dbg_dump_dapm(struct snd_soc_codec
* codec
, const char *action
)
662 struct snd_soc_dapm_widget
*w
;
663 struct snd_soc_dapm_path
*p
= NULL
;
666 printk("DAPM %s %s\n", codec
->name
, action
);
668 list_for_each_entry(w
, &codec
->dapm_widgets
, list
) {
670 /* only display widgets that effect routing */
672 case snd_soc_dapm_pre
:
673 case snd_soc_dapm_post
:
674 case snd_soc_dapm_vmid
:
676 case snd_soc_dapm_mux
:
677 case snd_soc_dapm_value_mux
:
678 case snd_soc_dapm_output
:
679 case snd_soc_dapm_input
:
680 case snd_soc_dapm_switch
:
681 case snd_soc_dapm_hp
:
682 case snd_soc_dapm_mic
:
683 case snd_soc_dapm_spk
:
684 case snd_soc_dapm_line
:
685 case snd_soc_dapm_micbias
:
686 case snd_soc_dapm_dac
:
687 case snd_soc_dapm_adc
:
688 case snd_soc_dapm_pga
:
689 case snd_soc_dapm_mixer
:
691 in
= is_connected_input_ep(w
);
692 dapm_clear_walk(w
->codec
);
693 out
= is_connected_output_ep(w
);
694 dapm_clear_walk(w
->codec
);
695 printk("%s: %s in %d out %d\n", w
->name
,
696 w
->power
? "On":"Off",in
, out
);
698 list_for_each_entry(p
, &w
->sources
, list_sink
) {
700 printk(" in %s %s\n", p
->name
? p
->name
: "static",
703 list_for_each_entry(p
, &w
->sinks
, list_source
) {
705 printk(" out %s %s\n", p
->name
? p
->name
: "static",
715 /* test and update the power status of a mux widget */
716 static int dapm_mux_update_power(struct snd_soc_dapm_widget
*widget
,
717 struct snd_kcontrol
*kcontrol
, int mask
,
718 int mux
, int val
, struct soc_enum
*e
)
720 struct snd_soc_dapm_path
*path
;
723 if (widget
->id
!= snd_soc_dapm_mux
)
726 if (!snd_soc_test_bits(widget
->codec
, e
->reg
, mask
, val
))
729 /* find dapm widget path assoc with kcontrol */
730 list_for_each_entry(path
, &widget
->codec
->dapm_paths
, list
) {
731 if (path
->kcontrol
!= kcontrol
)
734 if (!path
->name
|| !e
->texts
[mux
])
738 /* we now need to match the string in the enum to the path */
739 if (!(strcmp(path
->name
, e
->texts
[mux
])))
740 path
->connect
= 1; /* new connection */
742 path
->connect
= 0; /* old connection must be powered down */
746 dapm_power_widgets(widget
->codec
, SND_SOC_DAPM_STREAM_NOP
);
747 dump_dapm(widget
->codec
, "mux power update");
753 /* test and update the power status of a mixer or switch widget */
754 static int dapm_mixer_update_power(struct snd_soc_dapm_widget
*widget
,
755 struct snd_kcontrol
*kcontrol
, int reg
,
756 int val_mask
, int val
, int invert
)
758 struct snd_soc_dapm_path
*path
;
761 if (widget
->id
!= snd_soc_dapm_mixer
&&
762 widget
->id
!= snd_soc_dapm_switch
)
765 if (!snd_soc_test_bits(widget
->codec
, reg
, val_mask
, val
))
768 /* find dapm widget path assoc with kcontrol */
769 list_for_each_entry(path
, &widget
->codec
->dapm_paths
, list
) {
770 if (path
->kcontrol
!= kcontrol
)
773 /* found, now check type */
777 path
->connect
= invert
? 0:1;
779 /* old connection must be powered down */
780 path
->connect
= invert
? 1:0;
785 dapm_power_widgets(widget
->codec
, SND_SOC_DAPM_STREAM_NOP
);
786 dump_dapm(widget
->codec
, "mixer power update");
792 /* show dapm widget status in sys fs */
793 static ssize_t
dapm_widget_show(struct device
*dev
,
794 struct device_attribute
*attr
, char *buf
)
796 struct snd_soc_device
*devdata
= dev_get_drvdata(dev
);
797 struct snd_soc_codec
*codec
= devdata
->codec
;
798 struct snd_soc_dapm_widget
*w
;
800 char *state
= "not set";
802 list_for_each_entry(w
, &codec
->dapm_widgets
, list
) {
804 /* only display widgets that burnm power */
806 case snd_soc_dapm_hp
:
807 case snd_soc_dapm_mic
:
808 case snd_soc_dapm_spk
:
809 case snd_soc_dapm_line
:
810 case snd_soc_dapm_micbias
:
811 case snd_soc_dapm_dac
:
812 case snd_soc_dapm_adc
:
813 case snd_soc_dapm_pga
:
814 case snd_soc_dapm_mixer
:
816 count
+= sprintf(buf
+ count
, "%s: %s\n",
817 w
->name
, w
->power
? "On":"Off");
824 switch (codec
->bias_level
) {
825 case SND_SOC_BIAS_ON
:
828 case SND_SOC_BIAS_PREPARE
:
831 case SND_SOC_BIAS_STANDBY
:
834 case SND_SOC_BIAS_OFF
:
838 count
+= sprintf(buf
+ count
, "PM State: %s\n", state
);
843 static DEVICE_ATTR(dapm_widget
, 0444, dapm_widget_show
, NULL
);
845 int snd_soc_dapm_sys_add(struct device
*dev
)
849 return device_create_file(dev
, &dev_attr_dapm_widget
);
852 static void snd_soc_dapm_sys_remove(struct device
*dev
)
855 device_remove_file(dev
, &dev_attr_dapm_widget
);
859 /* free all dapm widgets and resources */
860 static void dapm_free_widgets(struct snd_soc_codec
*codec
)
862 struct snd_soc_dapm_widget
*w
, *next_w
;
863 struct snd_soc_dapm_path
*p
, *next_p
;
865 list_for_each_entry_safe(w
, next_w
, &codec
->dapm_widgets
, list
) {
870 list_for_each_entry_safe(p
, next_p
, &codec
->dapm_paths
, list
) {
877 static int snd_soc_dapm_set_pin(struct snd_soc_codec
*codec
,
878 char *pin
, int status
)
880 struct snd_soc_dapm_widget
*w
;
882 list_for_each_entry(w
, &codec
->dapm_widgets
, list
) {
883 if (!strcmp(w
->name
, pin
)) {
884 pr_debug("dapm: %s: pin %s\n", codec
->name
, pin
);
885 w
->connected
= status
;
890 pr_err("dapm: %s: configuring unknown pin %s\n", codec
->name
, pin
);
895 * snd_soc_dapm_sync - scan and power dapm paths
896 * @codec: audio codec
898 * Walks all dapm audio paths and powers widgets according to their
899 * stream or path usage.
901 * Returns 0 for success.
903 int snd_soc_dapm_sync(struct snd_soc_codec
*codec
)
905 int ret
= dapm_power_widgets(codec
, SND_SOC_DAPM_STREAM_NOP
);
906 dump_dapm(codec
, "sync");
909 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync
);
911 static int snd_soc_dapm_add_route(struct snd_soc_codec
*codec
,
912 const char *sink
, const char *control
, const char *source
)
914 struct snd_soc_dapm_path
*path
;
915 struct snd_soc_dapm_widget
*wsource
= NULL
, *wsink
= NULL
, *w
;
918 /* find src and dest widgets */
919 list_for_each_entry(w
, &codec
->dapm_widgets
, list
) {
921 if (!wsink
&& !(strcmp(w
->name
, sink
))) {
925 if (!wsource
&& !(strcmp(w
->name
, source
))) {
930 if (wsource
== NULL
|| wsink
== NULL
)
933 path
= kzalloc(sizeof(struct snd_soc_dapm_path
), GFP_KERNEL
);
937 path
->source
= wsource
;
939 INIT_LIST_HEAD(&path
->list
);
940 INIT_LIST_HEAD(&path
->list_source
);
941 INIT_LIST_HEAD(&path
->list_sink
);
943 /* check for external widgets */
944 if (wsink
->id
== snd_soc_dapm_input
) {
945 if (wsource
->id
== snd_soc_dapm_micbias
||
946 wsource
->id
== snd_soc_dapm_mic
||
947 wsink
->id
== snd_soc_dapm_line
||
948 wsink
->id
== snd_soc_dapm_output
)
951 if (wsource
->id
== snd_soc_dapm_output
) {
952 if (wsink
->id
== snd_soc_dapm_spk
||
953 wsink
->id
== snd_soc_dapm_hp
||
954 wsink
->id
== snd_soc_dapm_line
||
955 wsink
->id
== snd_soc_dapm_input
)
959 /* connect static paths */
960 if (control
== NULL
) {
961 list_add(&path
->list
, &codec
->dapm_paths
);
962 list_add(&path
->list_sink
, &wsink
->sources
);
963 list_add(&path
->list_source
, &wsource
->sinks
);
968 /* connect dynamic paths */
970 case snd_soc_dapm_adc
:
971 case snd_soc_dapm_dac
:
972 case snd_soc_dapm_pga
:
973 case snd_soc_dapm_input
:
974 case snd_soc_dapm_output
:
975 case snd_soc_dapm_micbias
:
976 case snd_soc_dapm_vmid
:
977 case snd_soc_dapm_pre
:
978 case snd_soc_dapm_post
:
979 list_add(&path
->list
, &codec
->dapm_paths
);
980 list_add(&path
->list_sink
, &wsink
->sources
);
981 list_add(&path
->list_source
, &wsource
->sinks
);
984 case snd_soc_dapm_mux
:
985 case snd_soc_dapm_value_mux
:
986 ret
= dapm_connect_mux(codec
, wsource
, wsink
, path
, control
,
987 &wsink
->kcontrols
[0]);
991 case snd_soc_dapm_switch
:
992 case snd_soc_dapm_mixer
:
993 ret
= dapm_connect_mixer(codec
, wsource
, wsink
, path
, control
);
997 case snd_soc_dapm_hp
:
998 case snd_soc_dapm_mic
:
999 case snd_soc_dapm_line
:
1000 case snd_soc_dapm_spk
:
1001 list_add(&path
->list
, &codec
->dapm_paths
);
1002 list_add(&path
->list_sink
, &wsink
->sources
);
1003 list_add(&path
->list_source
, &wsource
->sinks
);
1010 printk(KERN_WARNING
"asoc: no dapm match for %s --> %s --> %s\n", source
,
1017 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1019 * @route: audio routes
1020 * @num: number of routes
1022 * Connects 2 dapm widgets together via a named audio path. The sink is
1023 * the widget receiving the audio signal, whilst the source is the sender
1024 * of the audio signal.
1026 * Returns 0 for success else error. On error all resources can be freed
1027 * with a call to snd_soc_card_free().
1029 int snd_soc_dapm_add_routes(struct snd_soc_codec
*codec
,
1030 const struct snd_soc_dapm_route
*route
, int num
)
1034 for (i
= 0; i
< num
; i
++) {
1035 ret
= snd_soc_dapm_add_route(codec
, route
->sink
,
1036 route
->control
, route
->source
);
1038 printk(KERN_ERR
"Failed to add route %s->%s\n",
1048 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes
);
1051 * snd_soc_dapm_new_widgets - add new dapm widgets
1052 * @codec: audio codec
1054 * Checks the codec for any new dapm widgets and creates them if found.
1056 * Returns 0 for success.
1058 int snd_soc_dapm_new_widgets(struct snd_soc_codec
*codec
)
1060 struct snd_soc_dapm_widget
*w
;
1062 list_for_each_entry(w
, &codec
->dapm_widgets
, list
)
1068 case snd_soc_dapm_switch
:
1069 case snd_soc_dapm_mixer
:
1070 dapm_new_mixer(codec
, w
);
1072 case snd_soc_dapm_mux
:
1073 case snd_soc_dapm_value_mux
:
1074 dapm_new_mux(codec
, w
);
1076 case snd_soc_dapm_adc
:
1077 case snd_soc_dapm_dac
:
1078 case snd_soc_dapm_pga
:
1079 dapm_new_pga(codec
, w
);
1081 case snd_soc_dapm_input
:
1082 case snd_soc_dapm_output
:
1083 case snd_soc_dapm_micbias
:
1084 case snd_soc_dapm_spk
:
1085 case snd_soc_dapm_hp
:
1086 case snd_soc_dapm_mic
:
1087 case snd_soc_dapm_line
:
1088 case snd_soc_dapm_vmid
:
1089 case snd_soc_dapm_pre
:
1090 case snd_soc_dapm_post
:
1096 dapm_power_widgets(codec
, SND_SOC_DAPM_STREAM_NOP
);
1099 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets
);
1102 * snd_soc_dapm_get_volsw - dapm mixer get callback
1103 * @kcontrol: mixer control
1104 * @ucontrol: control element information
1106 * Callback to get the value of a dapm mixer control.
1108 * Returns 0 for success.
1110 int snd_soc_dapm_get_volsw(struct snd_kcontrol
*kcontrol
,
1111 struct snd_ctl_elem_value
*ucontrol
)
1113 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1114 struct soc_mixer_control
*mc
=
1115 (struct soc_mixer_control
*)kcontrol
->private_value
;
1116 unsigned int reg
= mc
->reg
;
1117 unsigned int shift
= mc
->shift
;
1118 unsigned int rshift
= mc
->rshift
;
1120 unsigned int invert
= mc
->invert
;
1121 unsigned int mask
= (1 << fls(max
)) - 1;
1123 /* return the saved value if we are powered down */
1124 if (widget
->id
== snd_soc_dapm_pga
&& !widget
->power
) {
1125 ucontrol
->value
.integer
.value
[0] = widget
->saved_value
;
1129 ucontrol
->value
.integer
.value
[0] =
1130 (snd_soc_read(widget
->codec
, reg
) >> shift
) & mask
;
1131 if (shift
!= rshift
)
1132 ucontrol
->value
.integer
.value
[1] =
1133 (snd_soc_read(widget
->codec
, reg
) >> rshift
) & mask
;
1135 ucontrol
->value
.integer
.value
[0] =
1136 max
- ucontrol
->value
.integer
.value
[0];
1137 if (shift
!= rshift
)
1138 ucontrol
->value
.integer
.value
[1] =
1139 max
- ucontrol
->value
.integer
.value
[1];
1144 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw
);
1147 * snd_soc_dapm_put_volsw - dapm mixer set callback
1148 * @kcontrol: mixer control
1149 * @ucontrol: control element information
1151 * Callback to set the value of a dapm mixer control.
1153 * Returns 0 for success.
1155 int snd_soc_dapm_put_volsw(struct snd_kcontrol
*kcontrol
,
1156 struct snd_ctl_elem_value
*ucontrol
)
1158 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1159 struct soc_mixer_control
*mc
=
1160 (struct soc_mixer_control
*)kcontrol
->private_value
;
1161 unsigned int reg
= mc
->reg
;
1162 unsigned int shift
= mc
->shift
;
1163 unsigned int rshift
= mc
->rshift
;
1165 unsigned int mask
= (1 << fls(max
)) - 1;
1166 unsigned int invert
= mc
->invert
;
1167 unsigned short val
, val2
, val_mask
;
1170 val
= (ucontrol
->value
.integer
.value
[0] & mask
);
1174 val_mask
= mask
<< shift
;
1176 if (shift
!= rshift
) {
1177 val2
= (ucontrol
->value
.integer
.value
[1] & mask
);
1180 val_mask
|= mask
<< rshift
;
1181 val
|= val2
<< rshift
;
1184 mutex_lock(&widget
->codec
->mutex
);
1185 widget
->value
= val
;
1187 /* save volume value if the widget is powered down */
1188 if (widget
->id
== snd_soc_dapm_pga
&& !widget
->power
) {
1189 widget
->saved_value
= val
;
1190 mutex_unlock(&widget
->codec
->mutex
);
1194 dapm_mixer_update_power(widget
, kcontrol
, reg
, val_mask
, val
, invert
);
1195 if (widget
->event
) {
1196 if (widget
->event_flags
& SND_SOC_DAPM_PRE_REG
) {
1197 ret
= widget
->event(widget
, kcontrol
,
1198 SND_SOC_DAPM_PRE_REG
);
1204 ret
= snd_soc_update_bits(widget
->codec
, reg
, val_mask
, val
);
1205 if (widget
->event_flags
& SND_SOC_DAPM_POST_REG
)
1206 ret
= widget
->event(widget
, kcontrol
,
1207 SND_SOC_DAPM_POST_REG
);
1209 ret
= snd_soc_update_bits(widget
->codec
, reg
, val_mask
, val
);
1212 mutex_unlock(&widget
->codec
->mutex
);
1215 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw
);
1218 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
1219 * @kcontrol: mixer control
1220 * @ucontrol: control element information
1222 * Callback to get the value of a dapm enumerated double mixer control.
1224 * Returns 0 for success.
1226 int snd_soc_dapm_get_enum_double(struct snd_kcontrol
*kcontrol
,
1227 struct snd_ctl_elem_value
*ucontrol
)
1229 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1230 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1231 unsigned short val
, bitmask
;
1233 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
1235 val
= snd_soc_read(widget
->codec
, e
->reg
);
1236 ucontrol
->value
.enumerated
.item
[0] = (val
>> e
->shift_l
) & (bitmask
- 1);
1237 if (e
->shift_l
!= e
->shift_r
)
1238 ucontrol
->value
.enumerated
.item
[1] =
1239 (val
>> e
->shift_r
) & (bitmask
- 1);
1243 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double
);
1246 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
1247 * @kcontrol: mixer control
1248 * @ucontrol: control element information
1250 * Callback to set the value of a dapm enumerated double mixer control.
1252 * Returns 0 for success.
1254 int snd_soc_dapm_put_enum_double(struct snd_kcontrol
*kcontrol
,
1255 struct snd_ctl_elem_value
*ucontrol
)
1257 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1258 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1259 unsigned short val
, mux
;
1260 unsigned short mask
, bitmask
;
1263 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
1265 if (ucontrol
->value
.enumerated
.item
[0] > e
->max
- 1)
1267 mux
= ucontrol
->value
.enumerated
.item
[0];
1268 val
= mux
<< e
->shift_l
;
1269 mask
= (bitmask
- 1) << e
->shift_l
;
1270 if (e
->shift_l
!= e
->shift_r
) {
1271 if (ucontrol
->value
.enumerated
.item
[1] > e
->max
- 1)
1273 val
|= ucontrol
->value
.enumerated
.item
[1] << e
->shift_r
;
1274 mask
|= (bitmask
- 1) << e
->shift_r
;
1277 mutex_lock(&widget
->codec
->mutex
);
1278 widget
->value
= val
;
1279 dapm_mux_update_power(widget
, kcontrol
, mask
, mux
, val
, e
);
1280 if (widget
->event
) {
1281 if (widget
->event_flags
& SND_SOC_DAPM_PRE_REG
) {
1282 ret
= widget
->event(widget
,
1283 kcontrol
, SND_SOC_DAPM_PRE_REG
);
1287 ret
= snd_soc_update_bits(widget
->codec
, e
->reg
, mask
, val
);
1288 if (widget
->event_flags
& SND_SOC_DAPM_POST_REG
)
1289 ret
= widget
->event(widget
,
1290 kcontrol
, SND_SOC_DAPM_POST_REG
);
1292 ret
= snd_soc_update_bits(widget
->codec
, e
->reg
, mask
, val
);
1295 mutex_unlock(&widget
->codec
->mutex
);
1298 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double
);
1301 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
1303 * @kcontrol: mixer control
1304 * @ucontrol: control element information
1306 * Callback to get the value of a dapm semi enumerated double mixer control.
1308 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1309 * used for handling bitfield coded enumeration for example.
1311 * Returns 0 for success.
1313 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol
*kcontrol
,
1314 struct snd_ctl_elem_value
*ucontrol
)
1316 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1317 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1318 unsigned short reg_val
, val
, mux
;
1320 reg_val
= snd_soc_read(widget
->codec
, e
->reg
);
1321 val
= (reg_val
>> e
->shift_l
) & e
->mask
;
1322 for (mux
= 0; mux
< e
->max
; mux
++) {
1323 if (val
== e
->values
[mux
])
1326 ucontrol
->value
.enumerated
.item
[0] = mux
;
1327 if (e
->shift_l
!= e
->shift_r
) {
1328 val
= (reg_val
>> e
->shift_r
) & e
->mask
;
1329 for (mux
= 0; mux
< e
->max
; mux
++) {
1330 if (val
== e
->values
[mux
])
1333 ucontrol
->value
.enumerated
.item
[1] = mux
;
1338 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double
);
1341 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
1343 * @kcontrol: mixer control
1344 * @ucontrol: control element information
1346 * Callback to set the value of a dapm semi enumerated double mixer control.
1348 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1349 * used for handling bitfield coded enumeration for example.
1351 * Returns 0 for success.
1353 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol
*kcontrol
,
1354 struct snd_ctl_elem_value
*ucontrol
)
1356 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1357 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1358 unsigned short val
, mux
;
1359 unsigned short mask
;
1362 if (ucontrol
->value
.enumerated
.item
[0] > e
->max
- 1)
1364 mux
= ucontrol
->value
.enumerated
.item
[0];
1365 val
= e
->values
[ucontrol
->value
.enumerated
.item
[0]] << e
->shift_l
;
1366 mask
= e
->mask
<< e
->shift_l
;
1367 if (e
->shift_l
!= e
->shift_r
) {
1368 if (ucontrol
->value
.enumerated
.item
[1] > e
->max
- 1)
1370 val
|= e
->values
[ucontrol
->value
.enumerated
.item
[1]] << e
->shift_r
;
1371 mask
|= e
->mask
<< e
->shift_r
;
1374 mutex_lock(&widget
->codec
->mutex
);
1375 widget
->value
= val
;
1376 dapm_mux_update_power(widget
, kcontrol
, mask
, mux
, val
, e
);
1377 if (widget
->event
) {
1378 if (widget
->event_flags
& SND_SOC_DAPM_PRE_REG
) {
1379 ret
= widget
->event(widget
,
1380 kcontrol
, SND_SOC_DAPM_PRE_REG
);
1384 ret
= snd_soc_update_bits(widget
->codec
, e
->reg
, mask
, val
);
1385 if (widget
->event_flags
& SND_SOC_DAPM_POST_REG
)
1386 ret
= widget
->event(widget
,
1387 kcontrol
, SND_SOC_DAPM_POST_REG
);
1389 ret
= snd_soc_update_bits(widget
->codec
, e
->reg
, mask
, val
);
1392 mutex_unlock(&widget
->codec
->mutex
);
1395 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double
);
1398 * snd_soc_dapm_new_control - create new dapm control
1399 * @codec: audio codec
1400 * @widget: widget template
1402 * Creates a new dapm control based upon the template.
1404 * Returns 0 for success else error.
1406 int snd_soc_dapm_new_control(struct snd_soc_codec
*codec
,
1407 const struct snd_soc_dapm_widget
*widget
)
1409 struct snd_soc_dapm_widget
*w
;
1411 if ((w
= dapm_cnew_widget(widget
)) == NULL
)
1415 INIT_LIST_HEAD(&w
->sources
);
1416 INIT_LIST_HEAD(&w
->sinks
);
1417 INIT_LIST_HEAD(&w
->list
);
1418 list_add(&w
->list
, &codec
->dapm_widgets
);
1420 /* machine layer set ups unconnected pins and insertions */
1424 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control
);
1427 * snd_soc_dapm_new_controls - create new dapm controls
1428 * @codec: audio codec
1429 * @widget: widget array
1430 * @num: number of widgets
1432 * Creates new DAPM controls based upon the templates.
1434 * Returns 0 for success else error.
1436 int snd_soc_dapm_new_controls(struct snd_soc_codec
*codec
,
1437 const struct snd_soc_dapm_widget
*widget
,
1442 for (i
= 0; i
< num
; i
++) {
1443 ret
= snd_soc_dapm_new_control(codec
, widget
);
1446 "ASoC: Failed to create DAPM control %s: %d\n",
1454 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls
);
1458 * snd_soc_dapm_stream_event - send a stream event to the dapm core
1459 * @codec: audio codec
1460 * @stream: stream name
1461 * @event: stream event
1463 * Sends a stream event to the dapm core. The core then makes any
1464 * necessary widget power changes.
1466 * Returns 0 for success else error.
1468 int snd_soc_dapm_stream_event(struct snd_soc_codec
*codec
,
1469 char *stream
, int event
)
1471 struct snd_soc_dapm_widget
*w
;
1476 mutex_lock(&codec
->mutex
);
1477 list_for_each_entry(w
, &codec
->dapm_widgets
, list
)
1481 pr_debug("widget %s\n %s stream %s event %d\n",
1482 w
->name
, w
->sname
, stream
, event
);
1483 if (strstr(w
->sname
, stream
)) {
1485 case SND_SOC_DAPM_STREAM_START
:
1488 case SND_SOC_DAPM_STREAM_STOP
:
1491 case SND_SOC_DAPM_STREAM_SUSPEND
:
1496 case SND_SOC_DAPM_STREAM_RESUME
:
1502 case SND_SOC_DAPM_STREAM_PAUSE_PUSH
:
1504 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE
:
1509 mutex_unlock(&codec
->mutex
);
1511 dapm_power_widgets(codec
, event
);
1512 dump_dapm(codec
, __func__
);
1515 EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event
);
1518 * snd_soc_dapm_set_bias_level - set the bias level for the system
1519 * @socdev: audio device
1520 * @level: level to configure
1522 * Configure the bias (power) levels for the SoC audio device.
1524 * Returns 0 for success else error.
1526 int snd_soc_dapm_set_bias_level(struct snd_soc_device
*socdev
,
1527 enum snd_soc_bias_level level
)
1529 struct snd_soc_codec
*codec
= socdev
->codec
;
1530 struct snd_soc_card
*card
= socdev
->card
;
1533 if (card
->set_bias_level
)
1534 ret
= card
->set_bias_level(card
, level
);
1535 if (ret
== 0 && codec
->set_bias_level
)
1536 ret
= codec
->set_bias_level(codec
, level
);
1542 * snd_soc_dapm_enable_pin - enable pin.
1546 * Enables input/output pin and it's parents or children widgets iff there is
1547 * a valid audio route and active audio stream.
1548 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1549 * do any widget power switching.
1551 int snd_soc_dapm_enable_pin(struct snd_soc_codec
*codec
, char *pin
)
1553 return snd_soc_dapm_set_pin(codec
, pin
, 1);
1555 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin
);
1558 * snd_soc_dapm_disable_pin - disable pin.
1562 * Disables input/output pin and it's parents or children widgets.
1563 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1564 * do any widget power switching.
1566 int snd_soc_dapm_disable_pin(struct snd_soc_codec
*codec
, char *pin
)
1568 return snd_soc_dapm_set_pin(codec
, pin
, 0);
1570 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin
);
1573 * snd_soc_dapm_nc_pin - permanently disable pin.
1577 * Marks the specified pin as being not connected, disabling it along
1578 * any parent or child widgets. At present this is identical to
1579 * snd_soc_dapm_disable_pin() but in future it will be extended to do
1580 * additional things such as disabling controls which only affect
1581 * paths through the pin.
1583 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1584 * do any widget power switching.
1586 int snd_soc_dapm_nc_pin(struct snd_soc_codec
*codec
, char *pin
)
1588 return snd_soc_dapm_set_pin(codec
, pin
, 0);
1590 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin
);
1593 * snd_soc_dapm_get_pin_status - get audio pin status
1594 * @codec: audio codec
1595 * @pin: audio signal pin endpoint (or start point)
1597 * Get audio pin status - connected or disconnected.
1599 * Returns 1 for connected otherwise 0.
1601 int snd_soc_dapm_get_pin_status(struct snd_soc_codec
*codec
, char *pin
)
1603 struct snd_soc_dapm_widget
*w
;
1605 list_for_each_entry(w
, &codec
->dapm_widgets
, list
) {
1606 if (!strcmp(w
->name
, pin
))
1607 return w
->connected
;
1612 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status
);
1615 * snd_soc_dapm_free - free dapm resources
1616 * @socdev: SoC device
1618 * Free all dapm widgets and resources.
1620 void snd_soc_dapm_free(struct snd_soc_device
*socdev
)
1622 struct snd_soc_codec
*codec
= socdev
->codec
;
1624 snd_soc_dapm_sys_remove(socdev
->dev
);
1625 dapm_free_widgets(codec
);
1627 EXPORT_SYMBOL_GPL(snd_soc_dapm_free
);
1629 /* Module information */
1630 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
1631 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
1632 MODULE_LICENSE("GPL");