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 each dapm widget for complete audio path.
527 * A complete path is a route that has valid endpoints i.e.:-
529 * o DAC to output pin.
530 * o Input Pin to ADC.
531 * o Input pin to Output pin (bypass, sidetone)
532 * o DAC to ADC (loopback).
534 static int dapm_power_widgets(struct snd_soc_codec
*codec
, int event
)
536 struct snd_soc_dapm_widget
*w
;
537 int in
, out
, i
, c
= 1, *seq
= NULL
, ret
= 0, power_change
, power
;
539 /* do we have a sequenced stream event */
540 if (event
== SND_SOC_DAPM_STREAM_START
) {
541 c
= ARRAY_SIZE(dapm_up_seq
);
543 } else if (event
== SND_SOC_DAPM_STREAM_STOP
) {
544 c
= ARRAY_SIZE(dapm_down_seq
);
548 for(i
= 0; i
< c
; i
++) {
549 list_for_each_entry(w
, &codec
->dapm_widgets
, list
) {
551 /* is widget in stream order */
552 if (seq
&& seq
[i
] && w
->id
!= seq
[i
])
555 /* vmid - no action */
556 if (w
->id
== snd_soc_dapm_vmid
)
560 if (w
->id
== snd_soc_dapm_adc
&& w
->active
) {
561 in
= is_connected_input_ep(w
);
562 dapm_clear_walk(w
->codec
);
563 w
->power
= (in
!= 0) ? 1 : 0;
569 if (w
->id
== snd_soc_dapm_dac
&& w
->active
) {
570 out
= is_connected_output_ep(w
);
571 dapm_clear_walk(w
->codec
);
572 w
->power
= (out
!= 0) ? 1 : 0;
577 /* pre and post event widgets */
578 if (w
->id
== snd_soc_dapm_pre
) {
582 if (event
== SND_SOC_DAPM_STREAM_START
) {
584 NULL
, SND_SOC_DAPM_PRE_PMU
);
587 } else if (event
== SND_SOC_DAPM_STREAM_STOP
) {
589 NULL
, SND_SOC_DAPM_PRE_PMD
);
595 if (w
->id
== snd_soc_dapm_post
) {
599 if (event
== SND_SOC_DAPM_STREAM_START
) {
601 NULL
, SND_SOC_DAPM_POST_PMU
);
604 } else if (event
== SND_SOC_DAPM_STREAM_STOP
) {
606 NULL
, SND_SOC_DAPM_POST_PMD
);
613 /* all other widgets */
614 in
= is_connected_input_ep(w
);
615 dapm_clear_walk(w
->codec
);
616 out
= is_connected_output_ep(w
);
617 dapm_clear_walk(w
->codec
);
618 power
= (out
!= 0 && in
!= 0) ? 1 : 0;
619 power_change
= (w
->power
== power
) ? 0: 1;
625 /* call any power change event handlers */
627 pr_debug("power %s event for %s flags %x\n",
628 w
->power
? "on" : "off",
629 w
->name
, w
->event_flags
);
631 /* power up pre event */
632 if (power
&& w
->event
&&
633 (w
->event_flags
& SND_SOC_DAPM_PRE_PMU
)) {
634 ret
= w
->event(w
, NULL
, SND_SOC_DAPM_PRE_PMU
);
639 /* power down pre event */
640 if (!power
&& w
->event
&&
641 (w
->event_flags
& SND_SOC_DAPM_PRE_PMD
)) {
642 ret
= w
->event(w
, NULL
, SND_SOC_DAPM_PRE_PMD
);
647 /* Lower PGA volume to reduce pops */
648 if (w
->id
== snd_soc_dapm_pga
&& !power
)
649 dapm_set_pga(w
, power
);
653 /* Raise PGA volume to reduce pops */
654 if (w
->id
== snd_soc_dapm_pga
&& power
)
655 dapm_set_pga(w
, power
);
657 /* power up post event */
658 if (power
&& w
->event
&&
659 (w
->event_flags
& SND_SOC_DAPM_POST_PMU
)) {
661 NULL
, SND_SOC_DAPM_POST_PMU
);
666 /* power down post event */
667 if (!power
&& w
->event
&&
668 (w
->event_flags
& SND_SOC_DAPM_POST_PMD
)) {
669 ret
= w
->event(w
, NULL
, SND_SOC_DAPM_POST_PMD
);
680 static void dbg_dump_dapm(struct snd_soc_codec
* codec
, const char *action
)
682 struct snd_soc_dapm_widget
*w
;
683 struct snd_soc_dapm_path
*p
= NULL
;
686 printk("DAPM %s %s\n", codec
->name
, action
);
688 list_for_each_entry(w
, &codec
->dapm_widgets
, list
) {
690 /* only display widgets that effect routing */
692 case snd_soc_dapm_pre
:
693 case snd_soc_dapm_post
:
694 case snd_soc_dapm_vmid
:
696 case snd_soc_dapm_mux
:
697 case snd_soc_dapm_value_mux
:
698 case snd_soc_dapm_output
:
699 case snd_soc_dapm_input
:
700 case snd_soc_dapm_switch
:
701 case snd_soc_dapm_hp
:
702 case snd_soc_dapm_mic
:
703 case snd_soc_dapm_spk
:
704 case snd_soc_dapm_line
:
705 case snd_soc_dapm_micbias
:
706 case snd_soc_dapm_dac
:
707 case snd_soc_dapm_adc
:
708 case snd_soc_dapm_pga
:
709 case snd_soc_dapm_mixer
:
710 case snd_soc_dapm_mixer_named_ctl
:
712 in
= is_connected_input_ep(w
);
713 dapm_clear_walk(w
->codec
);
714 out
= is_connected_output_ep(w
);
715 dapm_clear_walk(w
->codec
);
716 printk("%s: %s in %d out %d\n", w
->name
,
717 w
->power
? "On":"Off",in
, out
);
719 list_for_each_entry(p
, &w
->sources
, list_sink
) {
721 printk(" in %s %s\n", p
->name
? p
->name
: "static",
724 list_for_each_entry(p
, &w
->sinks
, list_source
) {
726 printk(" out %s %s\n", p
->name
? p
->name
: "static",
736 /* test and update the power status of a mux widget */
737 static int dapm_mux_update_power(struct snd_soc_dapm_widget
*widget
,
738 struct snd_kcontrol
*kcontrol
, int mask
,
739 int mux
, int val
, struct soc_enum
*e
)
741 struct snd_soc_dapm_path
*path
;
744 if (widget
->id
!= snd_soc_dapm_mux
&&
745 widget
->id
!= snd_soc_dapm_value_mux
)
748 if (!snd_soc_test_bits(widget
->codec
, e
->reg
, mask
, val
))
751 /* find dapm widget path assoc with kcontrol */
752 list_for_each_entry(path
, &widget
->codec
->dapm_paths
, list
) {
753 if (path
->kcontrol
!= kcontrol
)
756 if (!path
->name
|| !e
->texts
[mux
])
760 /* we now need to match the string in the enum to the path */
761 if (!(strcmp(path
->name
, e
->texts
[mux
])))
762 path
->connect
= 1; /* new connection */
764 path
->connect
= 0; /* old connection must be powered down */
768 dapm_power_widgets(widget
->codec
, SND_SOC_DAPM_STREAM_NOP
);
769 dump_dapm(widget
->codec
, "mux power update");
775 /* test and update the power status of a mixer or switch widget */
776 static int dapm_mixer_update_power(struct snd_soc_dapm_widget
*widget
,
777 struct snd_kcontrol
*kcontrol
, int reg
,
778 int val_mask
, int val
, int invert
)
780 struct snd_soc_dapm_path
*path
;
783 if (widget
->id
!= snd_soc_dapm_mixer
&&
784 widget
->id
!= snd_soc_dapm_mixer_named_ctl
&&
785 widget
->id
!= snd_soc_dapm_switch
)
788 if (!snd_soc_test_bits(widget
->codec
, reg
, val_mask
, val
))
791 /* find dapm widget path assoc with kcontrol */
792 list_for_each_entry(path
, &widget
->codec
->dapm_paths
, list
) {
793 if (path
->kcontrol
!= kcontrol
)
796 /* found, now check type */
800 path
->connect
= invert
? 0:1;
802 /* old connection must be powered down */
803 path
->connect
= invert
? 1:0;
808 dapm_power_widgets(widget
->codec
, SND_SOC_DAPM_STREAM_NOP
);
809 dump_dapm(widget
->codec
, "mixer power update");
815 /* show dapm widget status in sys fs */
816 static ssize_t
dapm_widget_show(struct device
*dev
,
817 struct device_attribute
*attr
, char *buf
)
819 struct snd_soc_device
*devdata
= dev_get_drvdata(dev
);
820 struct snd_soc_codec
*codec
= devdata
->card
->codec
;
821 struct snd_soc_dapm_widget
*w
;
823 char *state
= "not set";
825 list_for_each_entry(w
, &codec
->dapm_widgets
, list
) {
827 /* only display widgets that burnm power */
829 case snd_soc_dapm_hp
:
830 case snd_soc_dapm_mic
:
831 case snd_soc_dapm_spk
:
832 case snd_soc_dapm_line
:
833 case snd_soc_dapm_micbias
:
834 case snd_soc_dapm_dac
:
835 case snd_soc_dapm_adc
:
836 case snd_soc_dapm_pga
:
837 case snd_soc_dapm_mixer
:
838 case snd_soc_dapm_mixer_named_ctl
:
840 count
+= sprintf(buf
+ count
, "%s: %s\n",
841 w
->name
, w
->power
? "On":"Off");
848 switch (codec
->bias_level
) {
849 case SND_SOC_BIAS_ON
:
852 case SND_SOC_BIAS_PREPARE
:
855 case SND_SOC_BIAS_STANDBY
:
858 case SND_SOC_BIAS_OFF
:
862 count
+= sprintf(buf
+ count
, "PM State: %s\n", state
);
867 static DEVICE_ATTR(dapm_widget
, 0444, dapm_widget_show
, NULL
);
869 int snd_soc_dapm_sys_add(struct device
*dev
)
873 return device_create_file(dev
, &dev_attr_dapm_widget
);
876 static void snd_soc_dapm_sys_remove(struct device
*dev
)
879 device_remove_file(dev
, &dev_attr_dapm_widget
);
883 /* free all dapm widgets and resources */
884 static void dapm_free_widgets(struct snd_soc_codec
*codec
)
886 struct snd_soc_dapm_widget
*w
, *next_w
;
887 struct snd_soc_dapm_path
*p
, *next_p
;
889 list_for_each_entry_safe(w
, next_w
, &codec
->dapm_widgets
, list
) {
894 list_for_each_entry_safe(p
, next_p
, &codec
->dapm_paths
, list
) {
901 static int snd_soc_dapm_set_pin(struct snd_soc_codec
*codec
,
902 const char *pin
, int status
)
904 struct snd_soc_dapm_widget
*w
;
906 list_for_each_entry(w
, &codec
->dapm_widgets
, list
) {
907 if (!strcmp(w
->name
, pin
)) {
908 pr_debug("dapm: %s: pin %s\n", codec
->name
, pin
);
909 w
->connected
= status
;
914 pr_err("dapm: %s: configuring unknown pin %s\n", codec
->name
, pin
);
919 * snd_soc_dapm_sync - scan and power dapm paths
920 * @codec: audio codec
922 * Walks all dapm audio paths and powers widgets according to their
923 * stream or path usage.
925 * Returns 0 for success.
927 int snd_soc_dapm_sync(struct snd_soc_codec
*codec
)
929 int ret
= dapm_power_widgets(codec
, SND_SOC_DAPM_STREAM_NOP
);
930 dump_dapm(codec
, "sync");
933 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync
);
935 static int snd_soc_dapm_add_route(struct snd_soc_codec
*codec
,
936 const char *sink
, const char *control
, const char *source
)
938 struct snd_soc_dapm_path
*path
;
939 struct snd_soc_dapm_widget
*wsource
= NULL
, *wsink
= NULL
, *w
;
942 /* find src and dest widgets */
943 list_for_each_entry(w
, &codec
->dapm_widgets
, list
) {
945 if (!wsink
&& !(strcmp(w
->name
, sink
))) {
949 if (!wsource
&& !(strcmp(w
->name
, source
))) {
954 if (wsource
== NULL
|| wsink
== NULL
)
957 path
= kzalloc(sizeof(struct snd_soc_dapm_path
), GFP_KERNEL
);
961 path
->source
= wsource
;
963 INIT_LIST_HEAD(&path
->list
);
964 INIT_LIST_HEAD(&path
->list_source
);
965 INIT_LIST_HEAD(&path
->list_sink
);
967 /* check for external widgets */
968 if (wsink
->id
== snd_soc_dapm_input
) {
969 if (wsource
->id
== snd_soc_dapm_micbias
||
970 wsource
->id
== snd_soc_dapm_mic
||
971 wsink
->id
== snd_soc_dapm_line
||
972 wsink
->id
== snd_soc_dapm_output
)
975 if (wsource
->id
== snd_soc_dapm_output
) {
976 if (wsink
->id
== snd_soc_dapm_spk
||
977 wsink
->id
== snd_soc_dapm_hp
||
978 wsink
->id
== snd_soc_dapm_line
||
979 wsink
->id
== snd_soc_dapm_input
)
983 /* connect static paths */
984 if (control
== NULL
) {
985 list_add(&path
->list
, &codec
->dapm_paths
);
986 list_add(&path
->list_sink
, &wsink
->sources
);
987 list_add(&path
->list_source
, &wsource
->sinks
);
992 /* connect dynamic paths */
994 case snd_soc_dapm_adc
:
995 case snd_soc_dapm_dac
:
996 case snd_soc_dapm_pga
:
997 case snd_soc_dapm_input
:
998 case snd_soc_dapm_output
:
999 case snd_soc_dapm_micbias
:
1000 case snd_soc_dapm_vmid
:
1001 case snd_soc_dapm_pre
:
1002 case snd_soc_dapm_post
:
1003 list_add(&path
->list
, &codec
->dapm_paths
);
1004 list_add(&path
->list_sink
, &wsink
->sources
);
1005 list_add(&path
->list_source
, &wsource
->sinks
);
1008 case snd_soc_dapm_mux
:
1009 case snd_soc_dapm_value_mux
:
1010 ret
= dapm_connect_mux(codec
, wsource
, wsink
, path
, control
,
1011 &wsink
->kcontrols
[0]);
1015 case snd_soc_dapm_switch
:
1016 case snd_soc_dapm_mixer
:
1017 case snd_soc_dapm_mixer_named_ctl
:
1018 ret
= dapm_connect_mixer(codec
, wsource
, wsink
, path
, control
);
1022 case snd_soc_dapm_hp
:
1023 case snd_soc_dapm_mic
:
1024 case snd_soc_dapm_line
:
1025 case snd_soc_dapm_spk
:
1026 list_add(&path
->list
, &codec
->dapm_paths
);
1027 list_add(&path
->list_sink
, &wsink
->sources
);
1028 list_add(&path
->list_source
, &wsource
->sinks
);
1035 printk(KERN_WARNING
"asoc: no dapm match for %s --> %s --> %s\n", source
,
1042 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1044 * @route: audio routes
1045 * @num: number of routes
1047 * Connects 2 dapm widgets together via a named audio path. The sink is
1048 * the widget receiving the audio signal, whilst the source is the sender
1049 * of the audio signal.
1051 * Returns 0 for success else error. On error all resources can be freed
1052 * with a call to snd_soc_card_free().
1054 int snd_soc_dapm_add_routes(struct snd_soc_codec
*codec
,
1055 const struct snd_soc_dapm_route
*route
, int num
)
1059 for (i
= 0; i
< num
; i
++) {
1060 ret
= snd_soc_dapm_add_route(codec
, route
->sink
,
1061 route
->control
, route
->source
);
1063 printk(KERN_ERR
"Failed to add route %s->%s\n",
1073 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes
);
1076 * snd_soc_dapm_new_widgets - add new dapm widgets
1077 * @codec: audio codec
1079 * Checks the codec for any new dapm widgets and creates them if found.
1081 * Returns 0 for success.
1083 int snd_soc_dapm_new_widgets(struct snd_soc_codec
*codec
)
1085 struct snd_soc_dapm_widget
*w
;
1087 list_for_each_entry(w
, &codec
->dapm_widgets
, list
)
1093 case snd_soc_dapm_switch
:
1094 case snd_soc_dapm_mixer
:
1095 case snd_soc_dapm_mixer_named_ctl
:
1096 dapm_new_mixer(codec
, w
);
1098 case snd_soc_dapm_mux
:
1099 case snd_soc_dapm_value_mux
:
1100 dapm_new_mux(codec
, w
);
1102 case snd_soc_dapm_adc
:
1103 case snd_soc_dapm_dac
:
1104 case snd_soc_dapm_pga
:
1105 dapm_new_pga(codec
, w
);
1107 case snd_soc_dapm_input
:
1108 case snd_soc_dapm_output
:
1109 case snd_soc_dapm_micbias
:
1110 case snd_soc_dapm_spk
:
1111 case snd_soc_dapm_hp
:
1112 case snd_soc_dapm_mic
:
1113 case snd_soc_dapm_line
:
1114 case snd_soc_dapm_vmid
:
1115 case snd_soc_dapm_pre
:
1116 case snd_soc_dapm_post
:
1122 dapm_power_widgets(codec
, SND_SOC_DAPM_STREAM_NOP
);
1125 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets
);
1128 * snd_soc_dapm_get_volsw - dapm mixer get callback
1129 * @kcontrol: mixer control
1130 * @ucontrol: control element information
1132 * Callback to get the value of a dapm mixer control.
1134 * Returns 0 for success.
1136 int snd_soc_dapm_get_volsw(struct snd_kcontrol
*kcontrol
,
1137 struct snd_ctl_elem_value
*ucontrol
)
1139 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1140 struct soc_mixer_control
*mc
=
1141 (struct soc_mixer_control
*)kcontrol
->private_value
;
1142 unsigned int reg
= mc
->reg
;
1143 unsigned int shift
= mc
->shift
;
1144 unsigned int rshift
= mc
->rshift
;
1146 unsigned int invert
= mc
->invert
;
1147 unsigned int mask
= (1 << fls(max
)) - 1;
1149 /* return the saved value if we are powered down */
1150 if (widget
->id
== snd_soc_dapm_pga
&& !widget
->power
) {
1151 ucontrol
->value
.integer
.value
[0] = widget
->saved_value
;
1155 ucontrol
->value
.integer
.value
[0] =
1156 (snd_soc_read(widget
->codec
, reg
) >> shift
) & mask
;
1157 if (shift
!= rshift
)
1158 ucontrol
->value
.integer
.value
[1] =
1159 (snd_soc_read(widget
->codec
, reg
) >> rshift
) & mask
;
1161 ucontrol
->value
.integer
.value
[0] =
1162 max
- ucontrol
->value
.integer
.value
[0];
1163 if (shift
!= rshift
)
1164 ucontrol
->value
.integer
.value
[1] =
1165 max
- ucontrol
->value
.integer
.value
[1];
1170 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw
);
1173 * snd_soc_dapm_put_volsw - dapm mixer set callback
1174 * @kcontrol: mixer control
1175 * @ucontrol: control element information
1177 * Callback to set the value of a dapm mixer control.
1179 * Returns 0 for success.
1181 int snd_soc_dapm_put_volsw(struct snd_kcontrol
*kcontrol
,
1182 struct snd_ctl_elem_value
*ucontrol
)
1184 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1185 struct soc_mixer_control
*mc
=
1186 (struct soc_mixer_control
*)kcontrol
->private_value
;
1187 unsigned int reg
= mc
->reg
;
1188 unsigned int shift
= mc
->shift
;
1189 unsigned int rshift
= mc
->rshift
;
1191 unsigned int mask
= (1 << fls(max
)) - 1;
1192 unsigned int invert
= mc
->invert
;
1193 unsigned short val
, val2
, val_mask
;
1196 val
= (ucontrol
->value
.integer
.value
[0] & mask
);
1200 val_mask
= mask
<< shift
;
1202 if (shift
!= rshift
) {
1203 val2
= (ucontrol
->value
.integer
.value
[1] & mask
);
1206 val_mask
|= mask
<< rshift
;
1207 val
|= val2
<< rshift
;
1210 mutex_lock(&widget
->codec
->mutex
);
1211 widget
->value
= val
;
1213 /* save volume value if the widget is powered down */
1214 if (widget
->id
== snd_soc_dapm_pga
&& !widget
->power
) {
1215 widget
->saved_value
= val
;
1216 mutex_unlock(&widget
->codec
->mutex
);
1220 dapm_mixer_update_power(widget
, kcontrol
, reg
, val_mask
, val
, invert
);
1221 if (widget
->event
) {
1222 if (widget
->event_flags
& SND_SOC_DAPM_PRE_REG
) {
1223 ret
= widget
->event(widget
, kcontrol
,
1224 SND_SOC_DAPM_PRE_REG
);
1230 ret
= snd_soc_update_bits(widget
->codec
, reg
, val_mask
, val
);
1231 if (widget
->event_flags
& SND_SOC_DAPM_POST_REG
)
1232 ret
= widget
->event(widget
, kcontrol
,
1233 SND_SOC_DAPM_POST_REG
);
1235 ret
= snd_soc_update_bits(widget
->codec
, reg
, val_mask
, val
);
1238 mutex_unlock(&widget
->codec
->mutex
);
1241 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw
);
1244 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
1245 * @kcontrol: mixer control
1246 * @ucontrol: control element information
1248 * Callback to get the value of a dapm enumerated double mixer control.
1250 * Returns 0 for success.
1252 int snd_soc_dapm_get_enum_double(struct snd_kcontrol
*kcontrol
,
1253 struct snd_ctl_elem_value
*ucontrol
)
1255 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1256 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1257 unsigned short val
, bitmask
;
1259 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
1261 val
= snd_soc_read(widget
->codec
, e
->reg
);
1262 ucontrol
->value
.enumerated
.item
[0] = (val
>> e
->shift_l
) & (bitmask
- 1);
1263 if (e
->shift_l
!= e
->shift_r
)
1264 ucontrol
->value
.enumerated
.item
[1] =
1265 (val
>> e
->shift_r
) & (bitmask
- 1);
1269 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double
);
1272 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
1273 * @kcontrol: mixer control
1274 * @ucontrol: control element information
1276 * Callback to set the value of a dapm enumerated double mixer control.
1278 * Returns 0 for success.
1280 int snd_soc_dapm_put_enum_double(struct snd_kcontrol
*kcontrol
,
1281 struct snd_ctl_elem_value
*ucontrol
)
1283 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1284 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1285 unsigned short val
, mux
;
1286 unsigned short mask
, bitmask
;
1289 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
1291 if (ucontrol
->value
.enumerated
.item
[0] > e
->max
- 1)
1293 mux
= ucontrol
->value
.enumerated
.item
[0];
1294 val
= mux
<< e
->shift_l
;
1295 mask
= (bitmask
- 1) << e
->shift_l
;
1296 if (e
->shift_l
!= e
->shift_r
) {
1297 if (ucontrol
->value
.enumerated
.item
[1] > e
->max
- 1)
1299 val
|= ucontrol
->value
.enumerated
.item
[1] << e
->shift_r
;
1300 mask
|= (bitmask
- 1) << e
->shift_r
;
1303 mutex_lock(&widget
->codec
->mutex
);
1304 widget
->value
= val
;
1305 dapm_mux_update_power(widget
, kcontrol
, mask
, mux
, val
, e
);
1306 if (widget
->event
) {
1307 if (widget
->event_flags
& SND_SOC_DAPM_PRE_REG
) {
1308 ret
= widget
->event(widget
,
1309 kcontrol
, SND_SOC_DAPM_PRE_REG
);
1313 ret
= snd_soc_update_bits(widget
->codec
, e
->reg
, mask
, val
);
1314 if (widget
->event_flags
& SND_SOC_DAPM_POST_REG
)
1315 ret
= widget
->event(widget
,
1316 kcontrol
, SND_SOC_DAPM_POST_REG
);
1318 ret
= snd_soc_update_bits(widget
->codec
, e
->reg
, mask
, val
);
1321 mutex_unlock(&widget
->codec
->mutex
);
1324 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double
);
1327 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
1329 * @kcontrol: mixer control
1330 * @ucontrol: control element information
1332 * Callback to get the value of a dapm semi enumerated double mixer control.
1334 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1335 * used for handling bitfield coded enumeration for example.
1337 * Returns 0 for success.
1339 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol
*kcontrol
,
1340 struct snd_ctl_elem_value
*ucontrol
)
1342 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1343 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1344 unsigned short reg_val
, val
, mux
;
1346 reg_val
= snd_soc_read(widget
->codec
, e
->reg
);
1347 val
= (reg_val
>> e
->shift_l
) & e
->mask
;
1348 for (mux
= 0; mux
< e
->max
; mux
++) {
1349 if (val
== e
->values
[mux
])
1352 ucontrol
->value
.enumerated
.item
[0] = mux
;
1353 if (e
->shift_l
!= e
->shift_r
) {
1354 val
= (reg_val
>> e
->shift_r
) & e
->mask
;
1355 for (mux
= 0; mux
< e
->max
; mux
++) {
1356 if (val
== e
->values
[mux
])
1359 ucontrol
->value
.enumerated
.item
[1] = mux
;
1364 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double
);
1367 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
1369 * @kcontrol: mixer control
1370 * @ucontrol: control element information
1372 * Callback to set the value of a dapm semi enumerated double mixer control.
1374 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1375 * used for handling bitfield coded enumeration for example.
1377 * Returns 0 for success.
1379 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol
*kcontrol
,
1380 struct snd_ctl_elem_value
*ucontrol
)
1382 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1383 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1384 unsigned short val
, mux
;
1385 unsigned short mask
;
1388 if (ucontrol
->value
.enumerated
.item
[0] > e
->max
- 1)
1390 mux
= ucontrol
->value
.enumerated
.item
[0];
1391 val
= e
->values
[ucontrol
->value
.enumerated
.item
[0]] << e
->shift_l
;
1392 mask
= e
->mask
<< e
->shift_l
;
1393 if (e
->shift_l
!= e
->shift_r
) {
1394 if (ucontrol
->value
.enumerated
.item
[1] > e
->max
- 1)
1396 val
|= e
->values
[ucontrol
->value
.enumerated
.item
[1]] << e
->shift_r
;
1397 mask
|= e
->mask
<< e
->shift_r
;
1400 mutex_lock(&widget
->codec
->mutex
);
1401 widget
->value
= val
;
1402 dapm_mux_update_power(widget
, kcontrol
, mask
, mux
, val
, e
);
1403 if (widget
->event
) {
1404 if (widget
->event_flags
& SND_SOC_DAPM_PRE_REG
) {
1405 ret
= widget
->event(widget
,
1406 kcontrol
, SND_SOC_DAPM_PRE_REG
);
1410 ret
= snd_soc_update_bits(widget
->codec
, e
->reg
, mask
, val
);
1411 if (widget
->event_flags
& SND_SOC_DAPM_POST_REG
)
1412 ret
= widget
->event(widget
,
1413 kcontrol
, SND_SOC_DAPM_POST_REG
);
1415 ret
= snd_soc_update_bits(widget
->codec
, e
->reg
, mask
, val
);
1418 mutex_unlock(&widget
->codec
->mutex
);
1421 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double
);
1424 * snd_soc_dapm_new_control - create new dapm control
1425 * @codec: audio codec
1426 * @widget: widget template
1428 * Creates a new dapm control based upon the template.
1430 * Returns 0 for success else error.
1432 int snd_soc_dapm_new_control(struct snd_soc_codec
*codec
,
1433 const struct snd_soc_dapm_widget
*widget
)
1435 struct snd_soc_dapm_widget
*w
;
1437 if ((w
= dapm_cnew_widget(widget
)) == NULL
)
1441 INIT_LIST_HEAD(&w
->sources
);
1442 INIT_LIST_HEAD(&w
->sinks
);
1443 INIT_LIST_HEAD(&w
->list
);
1444 list_add(&w
->list
, &codec
->dapm_widgets
);
1446 /* machine layer set ups unconnected pins and insertions */
1450 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control
);
1453 * snd_soc_dapm_new_controls - create new dapm controls
1454 * @codec: audio codec
1455 * @widget: widget array
1456 * @num: number of widgets
1458 * Creates new DAPM controls based upon the templates.
1460 * Returns 0 for success else error.
1462 int snd_soc_dapm_new_controls(struct snd_soc_codec
*codec
,
1463 const struct snd_soc_dapm_widget
*widget
,
1468 for (i
= 0; i
< num
; i
++) {
1469 ret
= snd_soc_dapm_new_control(codec
, widget
);
1472 "ASoC: Failed to create DAPM control %s: %d\n",
1480 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls
);
1484 * snd_soc_dapm_stream_event - send a stream event to the dapm core
1485 * @codec: audio codec
1486 * @stream: stream name
1487 * @event: stream event
1489 * Sends a stream event to the dapm core. The core then makes any
1490 * necessary widget power changes.
1492 * Returns 0 for success else error.
1494 int snd_soc_dapm_stream_event(struct snd_soc_codec
*codec
,
1495 char *stream
, int event
)
1497 struct snd_soc_dapm_widget
*w
;
1502 mutex_lock(&codec
->mutex
);
1503 list_for_each_entry(w
, &codec
->dapm_widgets
, list
)
1507 pr_debug("widget %s\n %s stream %s event %d\n",
1508 w
->name
, w
->sname
, stream
, event
);
1509 if (strstr(w
->sname
, stream
)) {
1511 case SND_SOC_DAPM_STREAM_START
:
1514 case SND_SOC_DAPM_STREAM_STOP
:
1517 case SND_SOC_DAPM_STREAM_SUSPEND
:
1522 case SND_SOC_DAPM_STREAM_RESUME
:
1528 case SND_SOC_DAPM_STREAM_PAUSE_PUSH
:
1530 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE
:
1535 mutex_unlock(&codec
->mutex
);
1537 dapm_power_widgets(codec
, event
);
1538 dump_dapm(codec
, __func__
);
1541 EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event
);
1544 * snd_soc_dapm_set_bias_level - set the bias level for the system
1545 * @socdev: audio device
1546 * @level: level to configure
1548 * Configure the bias (power) levels for the SoC audio device.
1550 * Returns 0 for success else error.
1552 int snd_soc_dapm_set_bias_level(struct snd_soc_device
*socdev
,
1553 enum snd_soc_bias_level level
)
1555 struct snd_soc_card
*card
= socdev
->card
;
1556 struct snd_soc_codec
*codec
= socdev
->card
->codec
;
1559 if (card
->set_bias_level
)
1560 ret
= card
->set_bias_level(card
, level
);
1561 if (ret
== 0 && codec
->set_bias_level
)
1562 ret
= codec
->set_bias_level(codec
, level
);
1568 * snd_soc_dapm_enable_pin - enable pin.
1572 * Enables input/output pin and it's parents or children widgets iff there is
1573 * a valid audio route and active audio stream.
1574 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1575 * do any widget power switching.
1577 int snd_soc_dapm_enable_pin(struct snd_soc_codec
*codec
, const char *pin
)
1579 return snd_soc_dapm_set_pin(codec
, pin
, 1);
1581 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin
);
1584 * snd_soc_dapm_disable_pin - disable pin.
1588 * Disables input/output pin and it's parents or children widgets.
1589 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1590 * do any widget power switching.
1592 int snd_soc_dapm_disable_pin(struct snd_soc_codec
*codec
, const char *pin
)
1594 return snd_soc_dapm_set_pin(codec
, pin
, 0);
1596 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin
);
1599 * snd_soc_dapm_nc_pin - permanently disable pin.
1603 * Marks the specified pin as being not connected, disabling it along
1604 * any parent or child widgets. At present this is identical to
1605 * snd_soc_dapm_disable_pin() but in future it will be extended to do
1606 * additional things such as disabling controls which only affect
1607 * paths through the pin.
1609 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1610 * do any widget power switching.
1612 int snd_soc_dapm_nc_pin(struct snd_soc_codec
*codec
, const char *pin
)
1614 return snd_soc_dapm_set_pin(codec
, pin
, 0);
1616 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin
);
1619 * snd_soc_dapm_get_pin_status - get audio pin status
1620 * @codec: audio codec
1621 * @pin: audio signal pin endpoint (or start point)
1623 * Get audio pin status - connected or disconnected.
1625 * Returns 1 for connected otherwise 0.
1627 int snd_soc_dapm_get_pin_status(struct snd_soc_codec
*codec
, const char *pin
)
1629 struct snd_soc_dapm_widget
*w
;
1631 list_for_each_entry(w
, &codec
->dapm_widgets
, list
) {
1632 if (!strcmp(w
->name
, pin
))
1633 return w
->connected
;
1638 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status
);
1641 * snd_soc_dapm_free - free dapm resources
1642 * @socdev: SoC device
1644 * Free all dapm widgets and resources.
1646 void snd_soc_dapm_free(struct snd_soc_device
*socdev
)
1648 struct snd_soc_codec
*codec
= socdev
->card
->codec
;
1650 snd_soc_dapm_sys_remove(socdev
->dev
);
1651 dapm_free_widgets(codec
);
1653 EXPORT_SYMBOL_GPL(snd_soc_dapm_free
);
1655 /* Module information */
1656 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
1657 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
1658 MODULE_LICENSE("GPL");