2 * soc-dapm.c -- ALSA SoC Dynamic Audio Power Management
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
13 * o Changes power status of internal codec blocks depending on the
14 * dynamic configuration of codec internal audio paths and active
16 * o Platform power domain - can support external components i.e. amps and
17 * mic/meadphone insertion events.
18 * o Automatic Mic Bias support
19 * o Jack insertion power event initiation - e.g. hp insertion will enable
21 * o Delayed powerdown of audio susbsystem to reduce pops between a quick
25 * o DAPM power change sequencing - allow for configurable per
27 * o Support for analogue bias optimisation.
28 * o Support for reduced codec oversampling rates.
29 * o Support for reduced codec bias currents.
32 #include <linux/module.h>
33 #include <linux/moduleparam.h>
34 #include <linux/init.h>
35 #include <linux/delay.h>
37 #include <linux/bitops.h>
38 #include <linux/platform_device.h>
39 #include <linux/jiffies.h>
40 #include <sound/core.h>
41 #include <sound/pcm.h>
42 #include <sound/pcm_params.h>
43 #include <sound/soc-dapm.h>
44 #include <sound/initval.h>
48 #define dump_dapm(codec, action) dbg_dump_dapm(codec, action)
50 #define dump_dapm(codec, action)
53 /* dapm power sequences - make this per codec in the future */
54 static int dapm_up_seq
[] = {
55 snd_soc_dapm_pre
, snd_soc_dapm_micbias
, snd_soc_dapm_mic
,
56 snd_soc_dapm_mux
, snd_soc_dapm_value_mux
, snd_soc_dapm_dac
,
57 snd_soc_dapm_mixer
, snd_soc_dapm_mixer_named_ctl
, snd_soc_dapm_pga
,
58 snd_soc_dapm_adc
, snd_soc_dapm_hp
, snd_soc_dapm_spk
, snd_soc_dapm_post
61 static int dapm_down_seq
[] = {
62 snd_soc_dapm_pre
, snd_soc_dapm_adc
, snd_soc_dapm_hp
, snd_soc_dapm_spk
,
63 snd_soc_dapm_pga
, snd_soc_dapm_mixer_named_ctl
, snd_soc_dapm_mixer
,
64 snd_soc_dapm_dac
, snd_soc_dapm_mic
, snd_soc_dapm_micbias
,
65 snd_soc_dapm_mux
, snd_soc_dapm_value_mux
, snd_soc_dapm_post
68 static int dapm_status
= 1;
69 module_param(dapm_status
, int, 0);
70 MODULE_PARM_DESC(dapm_status
, "enable DPM sysfs entries");
72 static void pop_wait(u32 pop_time
)
75 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time
));
78 static void pop_dbg(u32 pop_time
, const char *fmt
, ...)
92 /* create a new dapm widget */
93 static inline struct snd_soc_dapm_widget
*dapm_cnew_widget(
94 const struct snd_soc_dapm_widget
*_widget
)
96 return kmemdup(_widget
, sizeof(*_widget
), GFP_KERNEL
);
99 /* set up initial codec paths */
100 static void dapm_set_path_status(struct snd_soc_dapm_widget
*w
,
101 struct snd_soc_dapm_path
*p
, int i
)
104 case snd_soc_dapm_switch
:
105 case snd_soc_dapm_mixer
:
106 case snd_soc_dapm_mixer_named_ctl
: {
108 struct soc_mixer_control
*mc
= (struct soc_mixer_control
*)
109 w
->kcontrols
[i
].private_value
;
110 unsigned int reg
= mc
->reg
;
111 unsigned int shift
= mc
->shift
;
113 unsigned int mask
= (1 << fls(max
)) - 1;
114 unsigned int invert
= mc
->invert
;
116 val
= snd_soc_read(w
->codec
, reg
);
117 val
= (val
>> shift
) & mask
;
119 if ((invert
&& !val
) || (!invert
&& val
))
125 case snd_soc_dapm_mux
: {
126 struct soc_enum
*e
= (struct soc_enum
*)w
->kcontrols
[i
].private_value
;
127 int val
, item
, bitmask
;
129 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
131 val
= snd_soc_read(w
->codec
, e
->reg
);
132 item
= (val
>> e
->shift_l
) & (bitmask
- 1);
135 for (i
= 0; i
< e
->max
; i
++) {
136 if (!(strcmp(p
->name
, e
->texts
[i
])) && item
== i
)
141 case snd_soc_dapm_value_mux
: {
142 struct soc_enum
*e
= (struct soc_enum
*)
143 w
->kcontrols
[i
].private_value
;
146 val
= snd_soc_read(w
->codec
, e
->reg
);
147 val
= (val
>> e
->shift_l
) & e
->mask
;
148 for (item
= 0; item
< e
->max
; item
++) {
149 if (val
== e
->values
[item
])
154 for (i
= 0; i
< e
->max
; i
++) {
155 if (!(strcmp(p
->name
, e
->texts
[i
])) && item
== i
)
160 /* does not effect routing - always connected */
161 case snd_soc_dapm_pga
:
162 case snd_soc_dapm_output
:
163 case snd_soc_dapm_adc
:
164 case snd_soc_dapm_input
:
165 case snd_soc_dapm_dac
:
166 case snd_soc_dapm_micbias
:
167 case snd_soc_dapm_vmid
:
170 /* does effect routing - dynamically connected */
171 case snd_soc_dapm_hp
:
172 case snd_soc_dapm_mic
:
173 case snd_soc_dapm_spk
:
174 case snd_soc_dapm_line
:
175 case snd_soc_dapm_pre
:
176 case snd_soc_dapm_post
:
182 /* connect mux widget to it's interconnecting audio paths */
183 static int dapm_connect_mux(struct snd_soc_codec
*codec
,
184 struct snd_soc_dapm_widget
*src
, struct snd_soc_dapm_widget
*dest
,
185 struct snd_soc_dapm_path
*path
, const char *control_name
,
186 const struct snd_kcontrol_new
*kcontrol
)
188 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
191 for (i
= 0; i
< e
->max
; i
++) {
192 if (!(strcmp(control_name
, e
->texts
[i
]))) {
193 list_add(&path
->list
, &codec
->dapm_paths
);
194 list_add(&path
->list_sink
, &dest
->sources
);
195 list_add(&path
->list_source
, &src
->sinks
);
196 path
->name
= (char*)e
->texts
[i
];
197 dapm_set_path_status(dest
, path
, 0);
205 /* connect mixer widget to it's interconnecting audio paths */
206 static int dapm_connect_mixer(struct snd_soc_codec
*codec
,
207 struct snd_soc_dapm_widget
*src
, struct snd_soc_dapm_widget
*dest
,
208 struct snd_soc_dapm_path
*path
, const char *control_name
)
212 /* search for mixer kcontrol */
213 for (i
= 0; i
< dest
->num_kcontrols
; i
++) {
214 if (!strcmp(control_name
, dest
->kcontrols
[i
].name
)) {
215 list_add(&path
->list
, &codec
->dapm_paths
);
216 list_add(&path
->list_sink
, &dest
->sources
);
217 list_add(&path
->list_source
, &src
->sinks
);
218 path
->name
= dest
->kcontrols
[i
].name
;
219 dapm_set_path_status(dest
, path
, i
);
226 /* update dapm codec register bits */
227 static int dapm_update_bits(struct snd_soc_dapm_widget
*widget
)
230 unsigned short old
, new;
231 struct snd_soc_codec
*codec
= widget
->codec
;
233 /* check for valid widgets */
234 if (widget
->reg
< 0 || widget
->id
== snd_soc_dapm_input
||
235 widget
->id
== snd_soc_dapm_output
||
236 widget
->id
== snd_soc_dapm_hp
||
237 widget
->id
== snd_soc_dapm_mic
||
238 widget
->id
== snd_soc_dapm_line
||
239 widget
->id
== snd_soc_dapm_spk
)
242 power
= widget
->power
;
244 power
= (power
? 0:1);
246 old
= snd_soc_read(codec
, widget
->reg
);
247 new = (old
& ~(0x1 << widget
->shift
)) | (power
<< widget
->shift
);
251 pop_dbg(codec
->pop_time
, "pop test %s : %s in %d ms\n",
252 widget
->name
, widget
->power
? "on" : "off",
254 snd_soc_write(codec
, widget
->reg
, new);
255 pop_wait(codec
->pop_time
);
257 pr_debug("reg %x old %x new %x change %d\n", widget
->reg
,
262 /* ramps the volume up or down to minimise pops before or after a
263 * DAPM power event */
264 static int dapm_set_pga(struct snd_soc_dapm_widget
*widget
, int power
)
266 const struct snd_kcontrol_new
*k
= widget
->kcontrols
;
268 if (widget
->muted
&& !power
)
270 if (!widget
->muted
&& power
)
273 if (widget
->num_kcontrols
&& k
) {
274 struct soc_mixer_control
*mc
=
275 (struct soc_mixer_control
*)k
->private_value
;
276 unsigned int reg
= mc
->reg
;
277 unsigned int shift
= mc
->shift
;
279 unsigned int mask
= (1 << fls(max
)) - 1;
280 unsigned int invert
= mc
->invert
;
284 /* power up has happended, increase volume to last level */
286 for (i
= max
; i
> widget
->saved_value
; i
--)
287 snd_soc_update_bits(widget
->codec
, reg
, mask
, i
);
289 for (i
= 0; i
< widget
->saved_value
; i
++)
290 snd_soc_update_bits(widget
->codec
, reg
, mask
, i
);
294 /* power down is about to occur, decrease volume to mute */
295 int val
= snd_soc_read(widget
->codec
, reg
);
296 int i
= widget
->saved_value
= (val
>> shift
) & mask
;
298 for (; i
< mask
; i
++)
299 snd_soc_update_bits(widget
->codec
, reg
, mask
, i
);
302 snd_soc_update_bits(widget
->codec
, reg
, mask
, i
);
310 /* create new dapm mixer control */
311 static int dapm_new_mixer(struct snd_soc_codec
*codec
,
312 struct snd_soc_dapm_widget
*w
)
316 struct snd_soc_dapm_path
*path
;
319 for (i
= 0; i
< w
->num_kcontrols
; i
++) {
322 list_for_each_entry(path
, &w
->sources
, list_sink
) {
324 /* mixer/mux paths name must match control name */
325 if (path
->name
!= (char*)w
->kcontrols
[i
].name
)
328 /* add dapm control with long name.
329 * for dapm_mixer this is the concatenation of the
330 * mixer and kcontrol name.
331 * for dapm_mixer_named_ctl this is simply the
334 name_len
= strlen(w
->kcontrols
[i
].name
) + 1;
335 if (w
->id
!= snd_soc_dapm_mixer_named_ctl
)
336 name_len
+= 1 + strlen(w
->name
);
338 path
->long_name
= kmalloc(name_len
, GFP_KERNEL
);
340 if (path
->long_name
== NULL
)
345 snprintf(path
->long_name
, name_len
, "%s %s",
346 w
->name
, w
->kcontrols
[i
].name
);
348 case snd_soc_dapm_mixer_named_ctl
:
349 snprintf(path
->long_name
, name_len
, "%s",
350 w
->kcontrols
[i
].name
);
354 path
->long_name
[name_len
- 1] = '\0';
356 path
->kcontrol
= snd_soc_cnew(&w
->kcontrols
[i
], w
,
358 ret
= snd_ctl_add(codec
->card
, path
->kcontrol
);
360 printk(KERN_ERR
"asoc: failed to add dapm kcontrol %s: %d\n",
363 kfree(path
->long_name
);
364 path
->long_name
= NULL
;
372 /* create new dapm mux control */
373 static int dapm_new_mux(struct snd_soc_codec
*codec
,
374 struct snd_soc_dapm_widget
*w
)
376 struct snd_soc_dapm_path
*path
= NULL
;
377 struct snd_kcontrol
*kcontrol
;
380 if (!w
->num_kcontrols
) {
381 printk(KERN_ERR
"asoc: mux %s has no controls\n", w
->name
);
385 kcontrol
= snd_soc_cnew(&w
->kcontrols
[0], w
, w
->name
);
386 ret
= snd_ctl_add(codec
->card
, kcontrol
);
390 list_for_each_entry(path
, &w
->sources
, list_sink
)
391 path
->kcontrol
= kcontrol
;
396 printk(KERN_ERR
"asoc: failed to add kcontrol %s\n", w
->name
);
400 /* create new dapm volume control */
401 static int dapm_new_pga(struct snd_soc_codec
*codec
,
402 struct snd_soc_dapm_widget
*w
)
404 struct snd_kcontrol
*kcontrol
;
407 if (!w
->num_kcontrols
)
410 kcontrol
= snd_soc_cnew(&w
->kcontrols
[0], w
, w
->name
);
411 ret
= snd_ctl_add(codec
->card
, kcontrol
);
413 printk(KERN_ERR
"asoc: failed to add kcontrol %s\n", w
->name
);
420 /* reset 'walked' bit for each dapm path */
421 static inline void dapm_clear_walk(struct snd_soc_codec
*codec
)
423 struct snd_soc_dapm_path
*p
;
425 list_for_each_entry(p
, &codec
->dapm_paths
, list
)
430 * Recursively check for a completed path to an active or physically connected
431 * output widget. Returns number of complete paths.
433 static int is_connected_output_ep(struct snd_soc_dapm_widget
*widget
)
435 struct snd_soc_dapm_path
*path
;
438 if (widget
->id
== snd_soc_dapm_adc
&& widget
->active
)
441 if (widget
->connected
) {
442 /* connected pin ? */
443 if (widget
->id
== snd_soc_dapm_output
&& !widget
->ext
)
446 /* connected jack or spk ? */
447 if (widget
->id
== snd_soc_dapm_hp
|| widget
->id
== snd_soc_dapm_spk
||
448 widget
->id
== snd_soc_dapm_line
)
452 list_for_each_entry(path
, &widget
->sinks
, list_source
) {
456 if (path
->sink
&& path
->connect
) {
458 con
+= is_connected_output_ep(path
->sink
);
466 * Recursively check for a completed path to an active or physically connected
467 * input widget. Returns number of complete paths.
469 static int is_connected_input_ep(struct snd_soc_dapm_widget
*widget
)
471 struct snd_soc_dapm_path
*path
;
474 /* active stream ? */
475 if (widget
->id
== snd_soc_dapm_dac
&& widget
->active
)
478 if (widget
->connected
) {
479 /* connected pin ? */
480 if (widget
->id
== snd_soc_dapm_input
&& !widget
->ext
)
483 /* connected VMID/Bias for lower pops */
484 if (widget
->id
== snd_soc_dapm_vmid
)
487 /* connected jack ? */
488 if (widget
->id
== snd_soc_dapm_mic
|| widget
->id
== snd_soc_dapm_line
)
492 list_for_each_entry(path
, &widget
->sources
, list_sink
) {
496 if (path
->source
&& path
->connect
) {
498 con
+= is_connected_input_ep(path
->source
);
506 * Handler for generic register modifier widget.
508 int dapm_reg_event(struct snd_soc_dapm_widget
*w
,
509 struct snd_kcontrol
*kcontrol
, int event
)
513 if (SND_SOC_DAPM_EVENT_ON(event
))
518 snd_soc_update_bits(w
->codec
, -(w
->reg
+ 1),
519 w
->mask
<< w
->shift
, val
<< w
->shift
);
523 EXPORT_SYMBOL_GPL(dapm_reg_event
);
526 * Scan a single DAPM widget for a complete audio path and update the
527 * power status appropriately.
529 static int dapm_power_widget(struct snd_soc_codec
*codec
, int event
,
530 struct snd_soc_dapm_widget
*w
)
532 int in
, out
, power_change
, power
, ret
;
534 /* vmid - no action */
535 if (w
->id
== snd_soc_dapm_vmid
)
539 if (w
->id
== snd_soc_dapm_adc
&& w
->active
) {
540 in
= is_connected_input_ep(w
);
541 dapm_clear_walk(w
->codec
);
542 w
->power
= (in
!= 0) ? 1 : 0;
548 if (w
->id
== snd_soc_dapm_dac
&& w
->active
) {
549 out
= is_connected_output_ep(w
);
550 dapm_clear_walk(w
->codec
);
551 w
->power
= (out
!= 0) ? 1 : 0;
556 /* pre and post event widgets */
557 if (w
->id
== snd_soc_dapm_pre
) {
561 if (event
== SND_SOC_DAPM_STREAM_START
) {
563 NULL
, SND_SOC_DAPM_PRE_PMU
);
566 } else if (event
== SND_SOC_DAPM_STREAM_STOP
) {
568 NULL
, SND_SOC_DAPM_PRE_PMD
);
574 if (w
->id
== snd_soc_dapm_post
) {
578 if (event
== SND_SOC_DAPM_STREAM_START
) {
580 NULL
, SND_SOC_DAPM_POST_PMU
);
583 } else if (event
== SND_SOC_DAPM_STREAM_STOP
) {
585 NULL
, SND_SOC_DAPM_POST_PMD
);
592 /* all other widgets */
593 in
= is_connected_input_ep(w
);
594 dapm_clear_walk(w
->codec
);
595 out
= is_connected_output_ep(w
);
596 dapm_clear_walk(w
->codec
);
597 power
= (out
!= 0 && in
!= 0) ? 1 : 0;
598 power_change
= (w
->power
== power
) ? 0 : 1;
604 /* call any power change event handlers */
606 pr_debug("power %s event for %s flags %x\n",
607 w
->power
? "on" : "off",
608 w
->name
, w
->event_flags
);
610 /* power up pre event */
611 if (power
&& w
->event
&&
612 (w
->event_flags
& SND_SOC_DAPM_PRE_PMU
)) {
613 ret
= w
->event(w
, NULL
, SND_SOC_DAPM_PRE_PMU
);
618 /* power down pre event */
619 if (!power
&& w
->event
&&
620 (w
->event_flags
& SND_SOC_DAPM_PRE_PMD
)) {
621 ret
= w
->event(w
, NULL
, SND_SOC_DAPM_PRE_PMD
);
626 /* Lower PGA volume to reduce pops */
627 if (w
->id
== snd_soc_dapm_pga
&& !power
)
628 dapm_set_pga(w
, power
);
632 /* Raise PGA volume to reduce pops */
633 if (w
->id
== snd_soc_dapm_pga
&& power
)
634 dapm_set_pga(w
, power
);
636 /* power up post event */
637 if (power
&& w
->event
&&
638 (w
->event_flags
& SND_SOC_DAPM_POST_PMU
)) {
640 NULL
, SND_SOC_DAPM_POST_PMU
);
645 /* power down post event */
646 if (!power
&& w
->event
&&
647 (w
->event_flags
& SND_SOC_DAPM_POST_PMD
)) {
648 ret
= w
->event(w
, NULL
, SND_SOC_DAPM_POST_PMD
);
657 * Scan each dapm widget for complete audio path.
658 * A complete path is a route that has valid endpoints i.e.:-
660 * o DAC to output pin.
661 * o Input Pin to ADC.
662 * o Input pin to Output pin (bypass, sidetone)
663 * o DAC to ADC (loopback).
665 static int dapm_power_widgets(struct snd_soc_codec
*codec
, int event
)
667 struct snd_soc_dapm_widget
*w
;
668 int i
, c
= 1, *seq
= NULL
, ret
= 0;
670 /* do we have a sequenced stream event */
671 if (event
== SND_SOC_DAPM_STREAM_START
) {
672 c
= ARRAY_SIZE(dapm_up_seq
);
674 } else if (event
== SND_SOC_DAPM_STREAM_STOP
) {
675 c
= ARRAY_SIZE(dapm_down_seq
);
679 for (i
= 0; i
< c
; i
++) {
680 list_for_each_entry(w
, &codec
->dapm_widgets
, list
) {
682 /* is widget in stream order */
683 if (seq
&& seq
[i
] && w
->id
!= seq
[i
])
686 ret
= dapm_power_widget(codec
, event
, w
);
696 static void dbg_dump_dapm(struct snd_soc_codec
* codec
, const char *action
)
698 struct snd_soc_dapm_widget
*w
;
699 struct snd_soc_dapm_path
*p
= NULL
;
702 printk("DAPM %s %s\n", codec
->name
, action
);
704 list_for_each_entry(w
, &codec
->dapm_widgets
, list
) {
706 /* only display widgets that effect routing */
708 case snd_soc_dapm_pre
:
709 case snd_soc_dapm_post
:
710 case snd_soc_dapm_vmid
:
712 case snd_soc_dapm_mux
:
713 case snd_soc_dapm_value_mux
:
714 case snd_soc_dapm_output
:
715 case snd_soc_dapm_input
:
716 case snd_soc_dapm_switch
:
717 case snd_soc_dapm_hp
:
718 case snd_soc_dapm_mic
:
719 case snd_soc_dapm_spk
:
720 case snd_soc_dapm_line
:
721 case snd_soc_dapm_micbias
:
722 case snd_soc_dapm_dac
:
723 case snd_soc_dapm_adc
:
724 case snd_soc_dapm_pga
:
725 case snd_soc_dapm_mixer
:
726 case snd_soc_dapm_mixer_named_ctl
:
728 in
= is_connected_input_ep(w
);
729 dapm_clear_walk(w
->codec
);
730 out
= is_connected_output_ep(w
);
731 dapm_clear_walk(w
->codec
);
732 printk("%s: %s in %d out %d\n", w
->name
,
733 w
->power
? "On":"Off",in
, out
);
735 list_for_each_entry(p
, &w
->sources
, list_sink
) {
737 printk(" in %s %s\n", p
->name
? p
->name
: "static",
740 list_for_each_entry(p
, &w
->sinks
, list_source
) {
742 printk(" out %s %s\n", p
->name
? p
->name
: "static",
752 /* test and update the power status of a mux widget */
753 static int dapm_mux_update_power(struct snd_soc_dapm_widget
*widget
,
754 struct snd_kcontrol
*kcontrol
, int mask
,
755 int mux
, int val
, struct soc_enum
*e
)
757 struct snd_soc_dapm_path
*path
;
760 if (widget
->id
!= snd_soc_dapm_mux
&&
761 widget
->id
!= snd_soc_dapm_value_mux
)
764 if (!snd_soc_test_bits(widget
->codec
, e
->reg
, mask
, val
))
767 /* find dapm widget path assoc with kcontrol */
768 list_for_each_entry(path
, &widget
->codec
->dapm_paths
, list
) {
769 if (path
->kcontrol
!= kcontrol
)
772 if (!path
->name
|| !e
->texts
[mux
])
776 /* we now need to match the string in the enum to the path */
777 if (!(strcmp(path
->name
, e
->texts
[mux
])))
778 path
->connect
= 1; /* new connection */
780 path
->connect
= 0; /* old connection must be powered down */
784 dapm_power_widgets(widget
->codec
, SND_SOC_DAPM_STREAM_NOP
);
785 dump_dapm(widget
->codec
, "mux power update");
791 /* test and update the power status of a mixer or switch widget */
792 static int dapm_mixer_update_power(struct snd_soc_dapm_widget
*widget
,
793 struct snd_kcontrol
*kcontrol
, int reg
,
794 int val_mask
, int val
, int invert
)
796 struct snd_soc_dapm_path
*path
;
799 if (widget
->id
!= snd_soc_dapm_mixer
&&
800 widget
->id
!= snd_soc_dapm_mixer_named_ctl
&&
801 widget
->id
!= snd_soc_dapm_switch
)
804 if (!snd_soc_test_bits(widget
->codec
, reg
, val_mask
, val
))
807 /* find dapm widget path assoc with kcontrol */
808 list_for_each_entry(path
, &widget
->codec
->dapm_paths
, list
) {
809 if (path
->kcontrol
!= kcontrol
)
812 /* found, now check type */
816 path
->connect
= invert
? 0:1;
818 /* old connection must be powered down */
819 path
->connect
= invert
? 1:0;
824 dapm_power_widgets(widget
->codec
, SND_SOC_DAPM_STREAM_NOP
);
825 dump_dapm(widget
->codec
, "mixer power update");
831 /* show dapm widget status in sys fs */
832 static ssize_t
dapm_widget_show(struct device
*dev
,
833 struct device_attribute
*attr
, char *buf
)
835 struct snd_soc_device
*devdata
= dev_get_drvdata(dev
);
836 struct snd_soc_codec
*codec
= devdata
->card
->codec
;
837 struct snd_soc_dapm_widget
*w
;
839 char *state
= "not set";
841 list_for_each_entry(w
, &codec
->dapm_widgets
, list
) {
843 /* only display widgets that burnm power */
845 case snd_soc_dapm_hp
:
846 case snd_soc_dapm_mic
:
847 case snd_soc_dapm_spk
:
848 case snd_soc_dapm_line
:
849 case snd_soc_dapm_micbias
:
850 case snd_soc_dapm_dac
:
851 case snd_soc_dapm_adc
:
852 case snd_soc_dapm_pga
:
853 case snd_soc_dapm_mixer
:
854 case snd_soc_dapm_mixer_named_ctl
:
856 count
+= sprintf(buf
+ count
, "%s: %s\n",
857 w
->name
, w
->power
? "On":"Off");
864 switch (codec
->bias_level
) {
865 case SND_SOC_BIAS_ON
:
868 case SND_SOC_BIAS_PREPARE
:
871 case SND_SOC_BIAS_STANDBY
:
874 case SND_SOC_BIAS_OFF
:
878 count
+= sprintf(buf
+ count
, "PM State: %s\n", state
);
883 static DEVICE_ATTR(dapm_widget
, 0444, dapm_widget_show
, NULL
);
885 int snd_soc_dapm_sys_add(struct device
*dev
)
889 return device_create_file(dev
, &dev_attr_dapm_widget
);
892 static void snd_soc_dapm_sys_remove(struct device
*dev
)
895 device_remove_file(dev
, &dev_attr_dapm_widget
);
899 /* free all dapm widgets and resources */
900 static void dapm_free_widgets(struct snd_soc_codec
*codec
)
902 struct snd_soc_dapm_widget
*w
, *next_w
;
903 struct snd_soc_dapm_path
*p
, *next_p
;
905 list_for_each_entry_safe(w
, next_w
, &codec
->dapm_widgets
, list
) {
910 list_for_each_entry_safe(p
, next_p
, &codec
->dapm_paths
, list
) {
917 static int snd_soc_dapm_set_pin(struct snd_soc_codec
*codec
,
918 const char *pin
, int status
)
920 struct snd_soc_dapm_widget
*w
;
922 list_for_each_entry(w
, &codec
->dapm_widgets
, list
) {
923 if (!strcmp(w
->name
, pin
)) {
924 pr_debug("dapm: %s: pin %s\n", codec
->name
, pin
);
925 w
->connected
= status
;
930 pr_err("dapm: %s: configuring unknown pin %s\n", codec
->name
, pin
);
935 * snd_soc_dapm_sync - scan and power dapm paths
936 * @codec: audio codec
938 * Walks all dapm audio paths and powers widgets according to their
939 * stream or path usage.
941 * Returns 0 for success.
943 int snd_soc_dapm_sync(struct snd_soc_codec
*codec
)
945 int ret
= dapm_power_widgets(codec
, SND_SOC_DAPM_STREAM_NOP
);
946 dump_dapm(codec
, "sync");
949 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync
);
951 static int snd_soc_dapm_add_route(struct snd_soc_codec
*codec
,
952 const char *sink
, const char *control
, const char *source
)
954 struct snd_soc_dapm_path
*path
;
955 struct snd_soc_dapm_widget
*wsource
= NULL
, *wsink
= NULL
, *w
;
958 /* find src and dest widgets */
959 list_for_each_entry(w
, &codec
->dapm_widgets
, list
) {
961 if (!wsink
&& !(strcmp(w
->name
, sink
))) {
965 if (!wsource
&& !(strcmp(w
->name
, source
))) {
970 if (wsource
== NULL
|| wsink
== NULL
)
973 path
= kzalloc(sizeof(struct snd_soc_dapm_path
), GFP_KERNEL
);
977 path
->source
= wsource
;
979 INIT_LIST_HEAD(&path
->list
);
980 INIT_LIST_HEAD(&path
->list_source
);
981 INIT_LIST_HEAD(&path
->list_sink
);
983 /* check for external widgets */
984 if (wsink
->id
== snd_soc_dapm_input
) {
985 if (wsource
->id
== snd_soc_dapm_micbias
||
986 wsource
->id
== snd_soc_dapm_mic
||
987 wsink
->id
== snd_soc_dapm_line
||
988 wsink
->id
== snd_soc_dapm_output
)
991 if (wsource
->id
== snd_soc_dapm_output
) {
992 if (wsink
->id
== snd_soc_dapm_spk
||
993 wsink
->id
== snd_soc_dapm_hp
||
994 wsink
->id
== snd_soc_dapm_line
||
995 wsink
->id
== snd_soc_dapm_input
)
999 /* connect static paths */
1000 if (control
== NULL
) {
1001 list_add(&path
->list
, &codec
->dapm_paths
);
1002 list_add(&path
->list_sink
, &wsink
->sources
);
1003 list_add(&path
->list_source
, &wsource
->sinks
);
1008 /* connect dynamic paths */
1010 case snd_soc_dapm_adc
:
1011 case snd_soc_dapm_dac
:
1012 case snd_soc_dapm_pga
:
1013 case snd_soc_dapm_input
:
1014 case snd_soc_dapm_output
:
1015 case snd_soc_dapm_micbias
:
1016 case snd_soc_dapm_vmid
:
1017 case snd_soc_dapm_pre
:
1018 case snd_soc_dapm_post
:
1019 list_add(&path
->list
, &codec
->dapm_paths
);
1020 list_add(&path
->list_sink
, &wsink
->sources
);
1021 list_add(&path
->list_source
, &wsource
->sinks
);
1024 case snd_soc_dapm_mux
:
1025 case snd_soc_dapm_value_mux
:
1026 ret
= dapm_connect_mux(codec
, wsource
, wsink
, path
, control
,
1027 &wsink
->kcontrols
[0]);
1031 case snd_soc_dapm_switch
:
1032 case snd_soc_dapm_mixer
:
1033 case snd_soc_dapm_mixer_named_ctl
:
1034 ret
= dapm_connect_mixer(codec
, wsource
, wsink
, path
, control
);
1038 case snd_soc_dapm_hp
:
1039 case snd_soc_dapm_mic
:
1040 case snd_soc_dapm_line
:
1041 case snd_soc_dapm_spk
:
1042 list_add(&path
->list
, &codec
->dapm_paths
);
1043 list_add(&path
->list_sink
, &wsink
->sources
);
1044 list_add(&path
->list_source
, &wsource
->sinks
);
1051 printk(KERN_WARNING
"asoc: no dapm match for %s --> %s --> %s\n", source
,
1058 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1060 * @route: audio routes
1061 * @num: number of routes
1063 * Connects 2 dapm widgets together via a named audio path. The sink is
1064 * the widget receiving the audio signal, whilst the source is the sender
1065 * of the audio signal.
1067 * Returns 0 for success else error. On error all resources can be freed
1068 * with a call to snd_soc_card_free().
1070 int snd_soc_dapm_add_routes(struct snd_soc_codec
*codec
,
1071 const struct snd_soc_dapm_route
*route
, int num
)
1075 for (i
= 0; i
< num
; i
++) {
1076 ret
= snd_soc_dapm_add_route(codec
, route
->sink
,
1077 route
->control
, route
->source
);
1079 printk(KERN_ERR
"Failed to add route %s->%s\n",
1089 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes
);
1092 * snd_soc_dapm_new_widgets - add new dapm widgets
1093 * @codec: audio codec
1095 * Checks the codec for any new dapm widgets and creates them if found.
1097 * Returns 0 for success.
1099 int snd_soc_dapm_new_widgets(struct snd_soc_codec
*codec
)
1101 struct snd_soc_dapm_widget
*w
;
1103 list_for_each_entry(w
, &codec
->dapm_widgets
, list
)
1109 case snd_soc_dapm_switch
:
1110 case snd_soc_dapm_mixer
:
1111 case snd_soc_dapm_mixer_named_ctl
:
1112 dapm_new_mixer(codec
, w
);
1114 case snd_soc_dapm_mux
:
1115 case snd_soc_dapm_value_mux
:
1116 dapm_new_mux(codec
, w
);
1118 case snd_soc_dapm_adc
:
1119 case snd_soc_dapm_dac
:
1120 case snd_soc_dapm_pga
:
1121 dapm_new_pga(codec
, w
);
1123 case snd_soc_dapm_input
:
1124 case snd_soc_dapm_output
:
1125 case snd_soc_dapm_micbias
:
1126 case snd_soc_dapm_spk
:
1127 case snd_soc_dapm_hp
:
1128 case snd_soc_dapm_mic
:
1129 case snd_soc_dapm_line
:
1130 case snd_soc_dapm_vmid
:
1131 case snd_soc_dapm_pre
:
1132 case snd_soc_dapm_post
:
1138 dapm_power_widgets(codec
, SND_SOC_DAPM_STREAM_NOP
);
1141 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets
);
1144 * snd_soc_dapm_get_volsw - dapm mixer get callback
1145 * @kcontrol: mixer control
1146 * @ucontrol: control element information
1148 * Callback to get the value of a dapm mixer control.
1150 * Returns 0 for success.
1152 int snd_soc_dapm_get_volsw(struct snd_kcontrol
*kcontrol
,
1153 struct snd_ctl_elem_value
*ucontrol
)
1155 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1156 struct soc_mixer_control
*mc
=
1157 (struct soc_mixer_control
*)kcontrol
->private_value
;
1158 unsigned int reg
= mc
->reg
;
1159 unsigned int shift
= mc
->shift
;
1160 unsigned int rshift
= mc
->rshift
;
1162 unsigned int invert
= mc
->invert
;
1163 unsigned int mask
= (1 << fls(max
)) - 1;
1165 /* return the saved value if we are powered down */
1166 if (widget
->id
== snd_soc_dapm_pga
&& !widget
->power
) {
1167 ucontrol
->value
.integer
.value
[0] = widget
->saved_value
;
1171 ucontrol
->value
.integer
.value
[0] =
1172 (snd_soc_read(widget
->codec
, reg
) >> shift
) & mask
;
1173 if (shift
!= rshift
)
1174 ucontrol
->value
.integer
.value
[1] =
1175 (snd_soc_read(widget
->codec
, reg
) >> rshift
) & mask
;
1177 ucontrol
->value
.integer
.value
[0] =
1178 max
- ucontrol
->value
.integer
.value
[0];
1179 if (shift
!= rshift
)
1180 ucontrol
->value
.integer
.value
[1] =
1181 max
- ucontrol
->value
.integer
.value
[1];
1186 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw
);
1189 * snd_soc_dapm_put_volsw - dapm mixer set callback
1190 * @kcontrol: mixer control
1191 * @ucontrol: control element information
1193 * Callback to set the value of a dapm mixer control.
1195 * Returns 0 for success.
1197 int snd_soc_dapm_put_volsw(struct snd_kcontrol
*kcontrol
,
1198 struct snd_ctl_elem_value
*ucontrol
)
1200 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1201 struct soc_mixer_control
*mc
=
1202 (struct soc_mixer_control
*)kcontrol
->private_value
;
1203 unsigned int reg
= mc
->reg
;
1204 unsigned int shift
= mc
->shift
;
1205 unsigned int rshift
= mc
->rshift
;
1207 unsigned int mask
= (1 << fls(max
)) - 1;
1208 unsigned int invert
= mc
->invert
;
1209 unsigned short val
, val2
, val_mask
;
1212 val
= (ucontrol
->value
.integer
.value
[0] & mask
);
1216 val_mask
= mask
<< shift
;
1218 if (shift
!= rshift
) {
1219 val2
= (ucontrol
->value
.integer
.value
[1] & mask
);
1222 val_mask
|= mask
<< rshift
;
1223 val
|= val2
<< rshift
;
1226 mutex_lock(&widget
->codec
->mutex
);
1227 widget
->value
= val
;
1229 /* save volume value if the widget is powered down */
1230 if (widget
->id
== snd_soc_dapm_pga
&& !widget
->power
) {
1231 widget
->saved_value
= val
;
1232 mutex_unlock(&widget
->codec
->mutex
);
1236 dapm_mixer_update_power(widget
, kcontrol
, reg
, val_mask
, val
, invert
);
1237 if (widget
->event
) {
1238 if (widget
->event_flags
& SND_SOC_DAPM_PRE_REG
) {
1239 ret
= widget
->event(widget
, kcontrol
,
1240 SND_SOC_DAPM_PRE_REG
);
1246 ret
= snd_soc_update_bits(widget
->codec
, reg
, val_mask
, val
);
1247 if (widget
->event_flags
& SND_SOC_DAPM_POST_REG
)
1248 ret
= widget
->event(widget
, kcontrol
,
1249 SND_SOC_DAPM_POST_REG
);
1251 ret
= snd_soc_update_bits(widget
->codec
, reg
, val_mask
, val
);
1254 mutex_unlock(&widget
->codec
->mutex
);
1257 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw
);
1260 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
1261 * @kcontrol: mixer control
1262 * @ucontrol: control element information
1264 * Callback to get the value of a dapm enumerated double mixer control.
1266 * Returns 0 for success.
1268 int snd_soc_dapm_get_enum_double(struct snd_kcontrol
*kcontrol
,
1269 struct snd_ctl_elem_value
*ucontrol
)
1271 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1272 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1273 unsigned short val
, bitmask
;
1275 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
1277 val
= snd_soc_read(widget
->codec
, e
->reg
);
1278 ucontrol
->value
.enumerated
.item
[0] = (val
>> e
->shift_l
) & (bitmask
- 1);
1279 if (e
->shift_l
!= e
->shift_r
)
1280 ucontrol
->value
.enumerated
.item
[1] =
1281 (val
>> e
->shift_r
) & (bitmask
- 1);
1285 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double
);
1288 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
1289 * @kcontrol: mixer control
1290 * @ucontrol: control element information
1292 * Callback to set the value of a dapm enumerated double mixer control.
1294 * Returns 0 for success.
1296 int snd_soc_dapm_put_enum_double(struct snd_kcontrol
*kcontrol
,
1297 struct snd_ctl_elem_value
*ucontrol
)
1299 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1300 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1301 unsigned short val
, mux
;
1302 unsigned short mask
, bitmask
;
1305 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
1307 if (ucontrol
->value
.enumerated
.item
[0] > e
->max
- 1)
1309 mux
= ucontrol
->value
.enumerated
.item
[0];
1310 val
= mux
<< e
->shift_l
;
1311 mask
= (bitmask
- 1) << e
->shift_l
;
1312 if (e
->shift_l
!= e
->shift_r
) {
1313 if (ucontrol
->value
.enumerated
.item
[1] > e
->max
- 1)
1315 val
|= ucontrol
->value
.enumerated
.item
[1] << e
->shift_r
;
1316 mask
|= (bitmask
- 1) << e
->shift_r
;
1319 mutex_lock(&widget
->codec
->mutex
);
1320 widget
->value
= val
;
1321 dapm_mux_update_power(widget
, kcontrol
, mask
, mux
, val
, e
);
1322 if (widget
->event
) {
1323 if (widget
->event_flags
& SND_SOC_DAPM_PRE_REG
) {
1324 ret
= widget
->event(widget
,
1325 kcontrol
, SND_SOC_DAPM_PRE_REG
);
1329 ret
= snd_soc_update_bits(widget
->codec
, e
->reg
, mask
, val
);
1330 if (widget
->event_flags
& SND_SOC_DAPM_POST_REG
)
1331 ret
= widget
->event(widget
,
1332 kcontrol
, SND_SOC_DAPM_POST_REG
);
1334 ret
= snd_soc_update_bits(widget
->codec
, e
->reg
, mask
, val
);
1337 mutex_unlock(&widget
->codec
->mutex
);
1340 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double
);
1343 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
1345 * @kcontrol: mixer control
1346 * @ucontrol: control element information
1348 * Callback to get the value of a dapm semi enumerated double mixer control.
1350 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1351 * used for handling bitfield coded enumeration for example.
1353 * Returns 0 for success.
1355 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol
*kcontrol
,
1356 struct snd_ctl_elem_value
*ucontrol
)
1358 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1359 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1360 unsigned short reg_val
, val
, mux
;
1362 reg_val
= snd_soc_read(widget
->codec
, e
->reg
);
1363 val
= (reg_val
>> e
->shift_l
) & e
->mask
;
1364 for (mux
= 0; mux
< e
->max
; mux
++) {
1365 if (val
== e
->values
[mux
])
1368 ucontrol
->value
.enumerated
.item
[0] = mux
;
1369 if (e
->shift_l
!= e
->shift_r
) {
1370 val
= (reg_val
>> e
->shift_r
) & e
->mask
;
1371 for (mux
= 0; mux
< e
->max
; mux
++) {
1372 if (val
== e
->values
[mux
])
1375 ucontrol
->value
.enumerated
.item
[1] = mux
;
1380 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double
);
1383 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
1385 * @kcontrol: mixer control
1386 * @ucontrol: control element information
1388 * Callback to set the value of a dapm semi enumerated double mixer control.
1390 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1391 * used for handling bitfield coded enumeration for example.
1393 * Returns 0 for success.
1395 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol
*kcontrol
,
1396 struct snd_ctl_elem_value
*ucontrol
)
1398 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1399 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1400 unsigned short val
, mux
;
1401 unsigned short mask
;
1404 if (ucontrol
->value
.enumerated
.item
[0] > e
->max
- 1)
1406 mux
= ucontrol
->value
.enumerated
.item
[0];
1407 val
= e
->values
[ucontrol
->value
.enumerated
.item
[0]] << e
->shift_l
;
1408 mask
= e
->mask
<< e
->shift_l
;
1409 if (e
->shift_l
!= e
->shift_r
) {
1410 if (ucontrol
->value
.enumerated
.item
[1] > e
->max
- 1)
1412 val
|= e
->values
[ucontrol
->value
.enumerated
.item
[1]] << e
->shift_r
;
1413 mask
|= e
->mask
<< e
->shift_r
;
1416 mutex_lock(&widget
->codec
->mutex
);
1417 widget
->value
= val
;
1418 dapm_mux_update_power(widget
, kcontrol
, mask
, mux
, val
, e
);
1419 if (widget
->event
) {
1420 if (widget
->event_flags
& SND_SOC_DAPM_PRE_REG
) {
1421 ret
= widget
->event(widget
,
1422 kcontrol
, SND_SOC_DAPM_PRE_REG
);
1426 ret
= snd_soc_update_bits(widget
->codec
, e
->reg
, mask
, val
);
1427 if (widget
->event_flags
& SND_SOC_DAPM_POST_REG
)
1428 ret
= widget
->event(widget
,
1429 kcontrol
, SND_SOC_DAPM_POST_REG
);
1431 ret
= snd_soc_update_bits(widget
->codec
, e
->reg
, mask
, val
);
1434 mutex_unlock(&widget
->codec
->mutex
);
1437 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double
);
1440 * snd_soc_dapm_info_pin_switch - Info for a pin switch
1442 * @kcontrol: mixer control
1443 * @uinfo: control element information
1445 * Callback to provide information about a pin switch control.
1447 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol
*kcontrol
,
1448 struct snd_ctl_elem_info
*uinfo
)
1450 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_BOOLEAN
;
1452 uinfo
->value
.integer
.min
= 0;
1453 uinfo
->value
.integer
.max
= 1;
1457 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch
);
1460 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
1462 * @kcontrol: mixer control
1465 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol
*kcontrol
,
1466 struct snd_ctl_elem_value
*ucontrol
)
1468 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1469 const char *pin
= (const char *)kcontrol
->private_value
;
1471 mutex_lock(&codec
->mutex
);
1473 ucontrol
->value
.integer
.value
[0] =
1474 snd_soc_dapm_get_pin_status(codec
, pin
);
1476 mutex_unlock(&codec
->mutex
);
1480 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch
);
1483 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
1485 * @kcontrol: mixer control
1488 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol
*kcontrol
,
1489 struct snd_ctl_elem_value
*ucontrol
)
1491 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1492 const char *pin
= (const char *)kcontrol
->private_value
;
1494 mutex_lock(&codec
->mutex
);
1496 if (ucontrol
->value
.integer
.value
[0])
1497 snd_soc_dapm_enable_pin(codec
, pin
);
1499 snd_soc_dapm_disable_pin(codec
, pin
);
1501 snd_soc_dapm_sync(codec
);
1503 mutex_unlock(&codec
->mutex
);
1507 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch
);
1510 * snd_soc_dapm_new_control - create new dapm control
1511 * @codec: audio codec
1512 * @widget: widget template
1514 * Creates a new dapm control based upon the template.
1516 * Returns 0 for success else error.
1518 int snd_soc_dapm_new_control(struct snd_soc_codec
*codec
,
1519 const struct snd_soc_dapm_widget
*widget
)
1521 struct snd_soc_dapm_widget
*w
;
1523 if ((w
= dapm_cnew_widget(widget
)) == NULL
)
1527 INIT_LIST_HEAD(&w
->sources
);
1528 INIT_LIST_HEAD(&w
->sinks
);
1529 INIT_LIST_HEAD(&w
->list
);
1530 list_add(&w
->list
, &codec
->dapm_widgets
);
1532 /* machine layer set ups unconnected pins and insertions */
1536 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control
);
1539 * snd_soc_dapm_new_controls - create new dapm controls
1540 * @codec: audio codec
1541 * @widget: widget array
1542 * @num: number of widgets
1544 * Creates new DAPM controls based upon the templates.
1546 * Returns 0 for success else error.
1548 int snd_soc_dapm_new_controls(struct snd_soc_codec
*codec
,
1549 const struct snd_soc_dapm_widget
*widget
,
1554 for (i
= 0; i
< num
; i
++) {
1555 ret
= snd_soc_dapm_new_control(codec
, widget
);
1558 "ASoC: Failed to create DAPM control %s: %d\n",
1566 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls
);
1570 * snd_soc_dapm_stream_event - send a stream event to the dapm core
1571 * @codec: audio codec
1572 * @stream: stream name
1573 * @event: stream event
1575 * Sends a stream event to the dapm core. The core then makes any
1576 * necessary widget power changes.
1578 * Returns 0 for success else error.
1580 int snd_soc_dapm_stream_event(struct snd_soc_codec
*codec
,
1581 char *stream
, int event
)
1583 struct snd_soc_dapm_widget
*w
;
1588 mutex_lock(&codec
->mutex
);
1589 list_for_each_entry(w
, &codec
->dapm_widgets
, list
)
1593 pr_debug("widget %s\n %s stream %s event %d\n",
1594 w
->name
, w
->sname
, stream
, event
);
1595 if (strstr(w
->sname
, stream
)) {
1597 case SND_SOC_DAPM_STREAM_START
:
1600 case SND_SOC_DAPM_STREAM_STOP
:
1603 case SND_SOC_DAPM_STREAM_SUSPEND
:
1608 case SND_SOC_DAPM_STREAM_RESUME
:
1614 case SND_SOC_DAPM_STREAM_PAUSE_PUSH
:
1616 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE
:
1621 mutex_unlock(&codec
->mutex
);
1623 dapm_power_widgets(codec
, event
);
1624 dump_dapm(codec
, __func__
);
1627 EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event
);
1630 * snd_soc_dapm_set_bias_level - set the bias level for the system
1631 * @socdev: audio device
1632 * @level: level to configure
1634 * Configure the bias (power) levels for the SoC audio device.
1636 * Returns 0 for success else error.
1638 int snd_soc_dapm_set_bias_level(struct snd_soc_device
*socdev
,
1639 enum snd_soc_bias_level level
)
1641 struct snd_soc_card
*card
= socdev
->card
;
1642 struct snd_soc_codec
*codec
= socdev
->card
->codec
;
1645 if (card
->set_bias_level
)
1646 ret
= card
->set_bias_level(card
, level
);
1647 if (ret
== 0 && codec
->set_bias_level
)
1648 ret
= codec
->set_bias_level(codec
, level
);
1654 * snd_soc_dapm_enable_pin - enable pin.
1658 * Enables input/output pin and it's parents or children widgets iff there is
1659 * a valid audio route and active audio stream.
1660 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1661 * do any widget power switching.
1663 int snd_soc_dapm_enable_pin(struct snd_soc_codec
*codec
, const char *pin
)
1665 return snd_soc_dapm_set_pin(codec
, pin
, 1);
1667 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin
);
1670 * snd_soc_dapm_disable_pin - disable pin.
1674 * Disables input/output pin and it's parents or children widgets.
1675 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1676 * do any widget power switching.
1678 int snd_soc_dapm_disable_pin(struct snd_soc_codec
*codec
, const char *pin
)
1680 return snd_soc_dapm_set_pin(codec
, pin
, 0);
1682 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin
);
1685 * snd_soc_dapm_nc_pin - permanently disable pin.
1689 * Marks the specified pin as being not connected, disabling it along
1690 * any parent or child widgets. At present this is identical to
1691 * snd_soc_dapm_disable_pin() but in future it will be extended to do
1692 * additional things such as disabling controls which only affect
1693 * paths through the pin.
1695 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1696 * do any widget power switching.
1698 int snd_soc_dapm_nc_pin(struct snd_soc_codec
*codec
, const char *pin
)
1700 return snd_soc_dapm_set_pin(codec
, pin
, 0);
1702 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin
);
1705 * snd_soc_dapm_get_pin_status - get audio pin status
1706 * @codec: audio codec
1707 * @pin: audio signal pin endpoint (or start point)
1709 * Get audio pin status - connected or disconnected.
1711 * Returns 1 for connected otherwise 0.
1713 int snd_soc_dapm_get_pin_status(struct snd_soc_codec
*codec
, const char *pin
)
1715 struct snd_soc_dapm_widget
*w
;
1717 list_for_each_entry(w
, &codec
->dapm_widgets
, list
) {
1718 if (!strcmp(w
->name
, pin
))
1719 return w
->connected
;
1724 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status
);
1727 * snd_soc_dapm_free - free dapm resources
1728 * @socdev: SoC device
1730 * Free all dapm widgets and resources.
1732 void snd_soc_dapm_free(struct snd_soc_device
*socdev
)
1734 struct snd_soc_codec
*codec
= socdev
->card
->codec
;
1736 snd_soc_dapm_sys_remove(socdev
->dev
);
1737 dapm_free_widgets(codec
);
1739 EXPORT_SYMBOL_GPL(snd_soc_dapm_free
);
1741 /* Module information */
1742 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
1743 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
1744 MODULE_LICENSE("GPL");