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/headphone insertion events.
18 * o Automatic Mic Bias support
19 * o Jack insertion power event initiation - e.g. hp insertion will enable
21 * o Delayed power down of audio subsystem to reduce pops between a quick
26 #include <linux/module.h>
27 #include <linux/moduleparam.h>
28 #include <linux/init.h>
29 #include <linux/async.h>
30 #include <linux/delay.h>
32 #include <linux/bitops.h>
33 #include <linux/platform_device.h>
34 #include <linux/jiffies.h>
35 #include <linux/debugfs.h>
36 #include <linux/pm_runtime.h>
37 #include <linux/regulator/consumer.h>
38 #include <linux/slab.h>
39 #include <sound/core.h>
40 #include <sound/pcm.h>
41 #include <sound/pcm_params.h>
42 #include <sound/soc.h>
43 #include <sound/initval.h>
45 #include <trace/events/asoc.h>
47 #define DAPM_UPDATE_STAT(widget, val) widget->dapm->card->dapm_stats.val++;
49 /* dapm power sequences - make this per codec in the future */
50 static int dapm_up_seq
[] = {
51 [snd_soc_dapm_pre
] = 0,
52 [snd_soc_dapm_supply
] = 1,
53 [snd_soc_dapm_regulator_supply
] = 1,
54 [snd_soc_dapm_micbias
] = 2,
55 [snd_soc_dapm_dai
] = 3,
56 [snd_soc_dapm_aif_in
] = 3,
57 [snd_soc_dapm_aif_out
] = 3,
58 [snd_soc_dapm_mic
] = 4,
59 [snd_soc_dapm_mux
] = 5,
60 [snd_soc_dapm_virt_mux
] = 5,
61 [snd_soc_dapm_value_mux
] = 5,
62 [snd_soc_dapm_dac
] = 6,
63 [snd_soc_dapm_mixer
] = 7,
64 [snd_soc_dapm_mixer_named_ctl
] = 7,
65 [snd_soc_dapm_pga
] = 8,
66 [snd_soc_dapm_adc
] = 9,
67 [snd_soc_dapm_out_drv
] = 10,
68 [snd_soc_dapm_hp
] = 10,
69 [snd_soc_dapm_spk
] = 10,
70 [snd_soc_dapm_post
] = 11,
73 static int dapm_down_seq
[] = {
74 [snd_soc_dapm_pre
] = 0,
75 [snd_soc_dapm_adc
] = 1,
76 [snd_soc_dapm_hp
] = 2,
77 [snd_soc_dapm_spk
] = 2,
78 [snd_soc_dapm_out_drv
] = 2,
79 [snd_soc_dapm_pga
] = 4,
80 [snd_soc_dapm_mixer_named_ctl
] = 5,
81 [snd_soc_dapm_mixer
] = 5,
82 [snd_soc_dapm_dac
] = 6,
83 [snd_soc_dapm_mic
] = 7,
84 [snd_soc_dapm_micbias
] = 8,
85 [snd_soc_dapm_mux
] = 9,
86 [snd_soc_dapm_virt_mux
] = 9,
87 [snd_soc_dapm_value_mux
] = 9,
88 [snd_soc_dapm_aif_in
] = 10,
89 [snd_soc_dapm_aif_out
] = 10,
90 [snd_soc_dapm_dai
] = 10,
91 [snd_soc_dapm_regulator_supply
] = 11,
92 [snd_soc_dapm_supply
] = 11,
93 [snd_soc_dapm_post
] = 12,
96 static void pop_wait(u32 pop_time
)
99 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time
));
102 static void pop_dbg(struct device
*dev
, u32 pop_time
, const char *fmt
, ...)
110 buf
= kmalloc(PAGE_SIZE
, GFP_KERNEL
);
115 vsnprintf(buf
, PAGE_SIZE
, fmt
, args
);
116 dev_info(dev
, "%s", buf
);
122 static bool dapm_dirty_widget(struct snd_soc_dapm_widget
*w
)
124 return !list_empty(&w
->dirty
);
127 void dapm_mark_dirty(struct snd_soc_dapm_widget
*w
, const char *reason
)
129 if (!dapm_dirty_widget(w
)) {
130 dev_vdbg(w
->dapm
->dev
, "Marking %s dirty due to %s\n",
132 list_add_tail(&w
->dirty
, &w
->dapm
->card
->dapm_dirty
);
135 EXPORT_SYMBOL_GPL(dapm_mark_dirty
);
137 /* create a new dapm widget */
138 static inline struct snd_soc_dapm_widget
*dapm_cnew_widget(
139 const struct snd_soc_dapm_widget
*_widget
)
141 return kmemdup(_widget
, sizeof(*_widget
), GFP_KERNEL
);
144 /* get snd_card from DAPM context */
145 static inline struct snd_card
*dapm_get_snd_card(
146 struct snd_soc_dapm_context
*dapm
)
149 return dapm
->codec
->card
->snd_card
;
150 else if (dapm
->platform
)
151 return dapm
->platform
->card
->snd_card
;
159 /* get soc_card from DAPM context */
160 static inline struct snd_soc_card
*dapm_get_soc_card(
161 struct snd_soc_dapm_context
*dapm
)
164 return dapm
->codec
->card
;
165 else if (dapm
->platform
)
166 return dapm
->platform
->card
;
174 static void dapm_reset(struct snd_soc_card
*card
)
176 struct snd_soc_dapm_widget
*w
;
178 memset(&card
->dapm_stats
, 0, sizeof(card
->dapm_stats
));
180 list_for_each_entry(w
, &card
->widgets
, list
) {
181 w
->power_checked
= false;
187 static int soc_widget_read(struct snd_soc_dapm_widget
*w
, int reg
)
190 return snd_soc_read(w
->codec
, reg
);
191 else if (w
->platform
)
192 return snd_soc_platform_read(w
->platform
, reg
);
194 dev_err(w
->dapm
->dev
, "no valid widget read method\n");
198 static int soc_widget_write(struct snd_soc_dapm_widget
*w
, int reg
, int val
)
201 return snd_soc_write(w
->codec
, reg
, val
);
202 else if (w
->platform
)
203 return snd_soc_platform_write(w
->platform
, reg
, val
);
205 dev_err(w
->dapm
->dev
, "no valid widget write method\n");
209 static int soc_widget_update_bits(struct snd_soc_dapm_widget
*w
,
210 unsigned short reg
, unsigned int mask
, unsigned int value
)
213 unsigned int old
, new;
216 if (w
->codec
&& w
->codec
->using_regmap
) {
217 ret
= regmap_update_bits_check(w
->codec
->control_data
,
218 reg
, mask
, value
, &change
);
222 ret
= soc_widget_read(w
, reg
);
227 new = (old
& ~mask
) | (value
& mask
);
230 ret
= soc_widget_write(w
, reg
, new);
240 * snd_soc_dapm_set_bias_level - set the bias level for the system
241 * @dapm: DAPM context
242 * @level: level to configure
244 * Configure the bias (power) levels for the SoC audio device.
246 * Returns 0 for success else error.
248 static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context
*dapm
,
249 enum snd_soc_bias_level level
)
251 struct snd_soc_card
*card
= dapm
->card
;
254 trace_snd_soc_bias_level_start(card
, level
);
256 if (card
&& card
->set_bias_level
)
257 ret
= card
->set_bias_level(card
, dapm
, level
);
262 if (dapm
->codec
->driver
->set_bias_level
)
263 ret
= dapm
->codec
->driver
->set_bias_level(dapm
->codec
,
266 dapm
->bias_level
= level
;
271 if (card
&& card
->set_bias_level_post
)
272 ret
= card
->set_bias_level_post(card
, dapm
, level
);
274 trace_snd_soc_bias_level_done(card
, level
);
279 /* set up initial codec paths */
280 static void dapm_set_path_status(struct snd_soc_dapm_widget
*w
,
281 struct snd_soc_dapm_path
*p
, int i
)
284 case snd_soc_dapm_switch
:
285 case snd_soc_dapm_mixer
:
286 case snd_soc_dapm_mixer_named_ctl
: {
288 struct soc_mixer_control
*mc
= (struct soc_mixer_control
*)
289 w
->kcontrol_news
[i
].private_value
;
290 unsigned int reg
= mc
->reg
;
291 unsigned int shift
= mc
->shift
;
293 unsigned int mask
= (1 << fls(max
)) - 1;
294 unsigned int invert
= mc
->invert
;
296 val
= soc_widget_read(w
, reg
);
297 val
= (val
>> shift
) & mask
;
299 if ((invert
&& !val
) || (!invert
&& val
))
305 case snd_soc_dapm_mux
: {
306 struct soc_enum
*e
= (struct soc_enum
*)
307 w
->kcontrol_news
[i
].private_value
;
308 int val
, item
, bitmask
;
310 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
312 val
= soc_widget_read(w
, e
->reg
);
313 item
= (val
>> e
->shift_l
) & (bitmask
- 1);
316 for (i
= 0; i
< e
->max
; i
++) {
317 if (!(strcmp(p
->name
, e
->texts
[i
])) && item
== i
)
322 case snd_soc_dapm_virt_mux
: {
323 struct soc_enum
*e
= (struct soc_enum
*)
324 w
->kcontrol_news
[i
].private_value
;
327 /* since a virtual mux has no backing registers to
328 * decide which path to connect, it will try to match
329 * with the first enumeration. This is to ensure
330 * that the default mux choice (the first) will be
331 * correctly powered up during initialization.
333 if (!strcmp(p
->name
, e
->texts
[0]))
337 case snd_soc_dapm_value_mux
: {
338 struct soc_enum
*e
= (struct soc_enum
*)
339 w
->kcontrol_news
[i
].private_value
;
342 val
= soc_widget_read(w
, e
->reg
);
343 val
= (val
>> e
->shift_l
) & e
->mask
;
344 for (item
= 0; item
< e
->max
; item
++) {
345 if (val
== e
->values
[item
])
350 for (i
= 0; i
< e
->max
; i
++) {
351 if (!(strcmp(p
->name
, e
->texts
[i
])) && item
== i
)
356 /* does not affect routing - always connected */
357 case snd_soc_dapm_pga
:
358 case snd_soc_dapm_out_drv
:
359 case snd_soc_dapm_output
:
360 case snd_soc_dapm_adc
:
361 case snd_soc_dapm_input
:
362 case snd_soc_dapm_siggen
:
363 case snd_soc_dapm_dac
:
364 case snd_soc_dapm_micbias
:
365 case snd_soc_dapm_vmid
:
366 case snd_soc_dapm_supply
:
367 case snd_soc_dapm_regulator_supply
:
368 case snd_soc_dapm_aif_in
:
369 case snd_soc_dapm_aif_out
:
370 case snd_soc_dapm_dai
:
371 case snd_soc_dapm_hp
:
372 case snd_soc_dapm_mic
:
373 case snd_soc_dapm_spk
:
374 case snd_soc_dapm_line
:
377 /* does affect routing - dynamically connected */
378 case snd_soc_dapm_pre
:
379 case snd_soc_dapm_post
:
385 /* connect mux widget to its interconnecting audio paths */
386 static int dapm_connect_mux(struct snd_soc_dapm_context
*dapm
,
387 struct snd_soc_dapm_widget
*src
, struct snd_soc_dapm_widget
*dest
,
388 struct snd_soc_dapm_path
*path
, const char *control_name
,
389 const struct snd_kcontrol_new
*kcontrol
)
391 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
394 for (i
= 0; i
< e
->max
; i
++) {
395 if (!(strcmp(control_name
, e
->texts
[i
]))) {
396 list_add(&path
->list
, &dapm
->card
->paths
);
397 list_add(&path
->list_sink
, &dest
->sources
);
398 list_add(&path
->list_source
, &src
->sinks
);
399 path
->name
= (char*)e
->texts
[i
];
400 dapm_set_path_status(dest
, path
, 0);
408 /* connect mixer widget to its interconnecting audio paths */
409 static int dapm_connect_mixer(struct snd_soc_dapm_context
*dapm
,
410 struct snd_soc_dapm_widget
*src
, struct snd_soc_dapm_widget
*dest
,
411 struct snd_soc_dapm_path
*path
, const char *control_name
)
415 /* search for mixer kcontrol */
416 for (i
= 0; i
< dest
->num_kcontrols
; i
++) {
417 if (!strcmp(control_name
, dest
->kcontrol_news
[i
].name
)) {
418 list_add(&path
->list
, &dapm
->card
->paths
);
419 list_add(&path
->list_sink
, &dest
->sources
);
420 list_add(&path
->list_source
, &src
->sinks
);
421 path
->name
= dest
->kcontrol_news
[i
].name
;
422 dapm_set_path_status(dest
, path
, i
);
429 static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context
*dapm
,
430 struct snd_soc_dapm_widget
*kcontrolw
,
431 const struct snd_kcontrol_new
*kcontrol_new
,
432 struct snd_kcontrol
**kcontrol
)
434 struct snd_soc_dapm_widget
*w
;
439 list_for_each_entry(w
, &dapm
->card
->widgets
, list
) {
440 if (w
== kcontrolw
|| w
->dapm
!= kcontrolw
->dapm
)
442 for (i
= 0; i
< w
->num_kcontrols
; i
++) {
443 if (&w
->kcontrol_news
[i
] == kcontrol_new
) {
445 *kcontrol
= w
->kcontrols
[i
];
454 /* create new dapm mixer control */
455 static int dapm_new_mixer(struct snd_soc_dapm_widget
*w
)
457 struct snd_soc_dapm_context
*dapm
= w
->dapm
;
459 size_t name_len
, prefix_len
;
460 struct snd_soc_dapm_path
*path
;
461 struct snd_card
*card
= dapm
->card
->snd_card
;
463 struct snd_soc_dapm_widget_list
*wlist
;
467 prefix
= dapm
->codec
->name_prefix
;
472 prefix_len
= strlen(prefix
) + 1;
477 for (i
= 0; i
< w
->num_kcontrols
; i
++) {
480 list_for_each_entry(path
, &w
->sources
, list_sink
) {
482 /* mixer/mux paths name must match control name */
483 if (path
->name
!= (char *)w
->kcontrol_news
[i
].name
)
486 if (w
->kcontrols
[i
]) {
487 path
->kcontrol
= w
->kcontrols
[i
];
491 wlistsize
= sizeof(struct snd_soc_dapm_widget_list
) +
492 sizeof(struct snd_soc_dapm_widget
*),
493 wlist
= kzalloc(wlistsize
, GFP_KERNEL
);
496 "asoc: can't allocate widget list for %s\n",
500 wlist
->num_widgets
= 1;
501 wlist
->widgets
[0] = w
;
503 /* add dapm control with long name.
504 * for dapm_mixer this is the concatenation of the
505 * mixer and kcontrol name.
506 * for dapm_mixer_named_ctl this is simply the
509 name_len
= strlen(w
->kcontrol_news
[i
].name
) + 1;
510 if (w
->id
!= snd_soc_dapm_mixer_named_ctl
)
511 name_len
+= 1 + strlen(w
->name
);
513 path
->long_name
= kmalloc(name_len
, GFP_KERNEL
);
515 if (path
->long_name
== NULL
) {
522 /* The control will get a prefix from
523 * the control creation process but
524 * we're also using the same prefix
525 * for widgets so cut the prefix off
526 * the front of the widget name.
528 snprintf((char *)path
->long_name
, name_len
,
529 "%s %s", w
->name
+ prefix_len
,
530 w
->kcontrol_news
[i
].name
);
532 case snd_soc_dapm_mixer_named_ctl
:
533 snprintf((char *)path
->long_name
, name_len
,
534 "%s", w
->kcontrol_news
[i
].name
);
538 ((char *)path
->long_name
)[name_len
- 1] = '\0';
540 path
->kcontrol
= snd_soc_cnew(&w
->kcontrol_news
[i
],
541 wlist
, path
->long_name
,
543 ret
= snd_ctl_add(card
, path
->kcontrol
);
546 "asoc: failed to add dapm kcontrol %s: %d\n",
547 path
->long_name
, ret
);
549 kfree(path
->long_name
);
550 path
->long_name
= NULL
;
553 w
->kcontrols
[i
] = path
->kcontrol
;
559 /* create new dapm mux control */
560 static int dapm_new_mux(struct snd_soc_dapm_widget
*w
)
562 struct snd_soc_dapm_context
*dapm
= w
->dapm
;
563 struct snd_soc_dapm_path
*path
= NULL
;
564 struct snd_kcontrol
*kcontrol
;
565 struct snd_card
*card
= dapm
->card
->snd_card
;
569 struct snd_soc_dapm_widget_list
*wlist
;
570 int shared
, wlistentries
;
574 if (w
->num_kcontrols
!= 1) {
576 "asoc: mux %s has incorrect number of controls\n",
581 shared
= dapm_is_shared_kcontrol(dapm
, w
, &w
->kcontrol_news
[0],
584 wlist
= kcontrol
->private_data
;
585 wlistentries
= wlist
->num_widgets
+ 1;
590 wlistsize
= sizeof(struct snd_soc_dapm_widget_list
) +
591 wlistentries
* sizeof(struct snd_soc_dapm_widget
*),
592 wlist
= krealloc(wlist
, wlistsize
, GFP_KERNEL
);
595 "asoc: can't allocate widget list for %s\n", w
->name
);
598 wlist
->num_widgets
= wlistentries
;
599 wlist
->widgets
[wlistentries
- 1] = w
;
603 prefix
= dapm
->codec
->name_prefix
;
608 name
= w
->kcontrol_news
[0].name
;
613 prefix_len
= strlen(prefix
) + 1;
619 * The control will get a prefix from the control creation
620 * process but we're also using the same prefix for widgets so
621 * cut the prefix off the front of the widget name.
623 kcontrol
= snd_soc_cnew(&w
->kcontrol_news
[0], wlist
,
624 name
+ prefix_len
, prefix
);
625 ret
= snd_ctl_add(card
, kcontrol
);
627 dev_err(dapm
->dev
, "failed to add kcontrol %s: %d\n",
634 kcontrol
->private_data
= wlist
;
636 w
->kcontrols
[0] = kcontrol
;
638 list_for_each_entry(path
, &w
->sources
, list_sink
)
639 path
->kcontrol
= kcontrol
;
644 /* create new dapm volume control */
645 static int dapm_new_pga(struct snd_soc_dapm_widget
*w
)
647 if (w
->num_kcontrols
)
648 dev_err(w
->dapm
->dev
,
649 "asoc: PGA controls not supported: '%s'\n", w
->name
);
654 /* reset 'walked' bit for each dapm path */
655 static inline void dapm_clear_walk(struct snd_soc_dapm_context
*dapm
)
657 struct snd_soc_dapm_path
*p
;
659 list_for_each_entry(p
, &dapm
->card
->paths
, list
)
663 /* We implement power down on suspend by checking the power state of
664 * the ALSA card - when we are suspending the ALSA state for the card
667 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget
*widget
)
669 int level
= snd_power_get_state(widget
->dapm
->card
->snd_card
);
672 case SNDRV_CTL_POWER_D3hot
:
673 case SNDRV_CTL_POWER_D3cold
:
674 if (widget
->ignore_suspend
)
675 dev_dbg(widget
->dapm
->dev
, "%s ignoring suspend\n",
677 return widget
->ignore_suspend
;
684 * Recursively check for a completed path to an active or physically connected
685 * output widget. Returns number of complete paths.
687 static int is_connected_output_ep(struct snd_soc_dapm_widget
*widget
)
689 struct snd_soc_dapm_path
*path
;
692 if (widget
->outputs
>= 0)
693 return widget
->outputs
;
695 DAPM_UPDATE_STAT(widget
, path_checks
);
697 switch (widget
->id
) {
698 case snd_soc_dapm_supply
:
699 case snd_soc_dapm_regulator_supply
:
705 switch (widget
->id
) {
706 case snd_soc_dapm_adc
:
707 case snd_soc_dapm_aif_out
:
708 case snd_soc_dapm_dai
:
709 if (widget
->active
) {
710 widget
->outputs
= snd_soc_dapm_suspend_check(widget
);
711 return widget
->outputs
;
717 if (widget
->connected
) {
718 /* connected pin ? */
719 if (widget
->id
== snd_soc_dapm_output
&& !widget
->ext
) {
720 widget
->outputs
= snd_soc_dapm_suspend_check(widget
);
721 return widget
->outputs
;
724 /* connected jack or spk ? */
725 if (widget
->id
== snd_soc_dapm_hp
||
726 widget
->id
== snd_soc_dapm_spk
||
727 (widget
->id
== snd_soc_dapm_line
&&
728 !list_empty(&widget
->sources
))) {
729 widget
->outputs
= snd_soc_dapm_suspend_check(widget
);
730 return widget
->outputs
;
734 list_for_each_entry(path
, &widget
->sinks
, list_source
) {
735 DAPM_UPDATE_STAT(widget
, neighbour_checks
);
743 if (path
->sink
&& path
->connect
) {
745 con
+= is_connected_output_ep(path
->sink
);
749 widget
->outputs
= con
;
755 * Recursively check for a completed path to an active or physically connected
756 * input widget. Returns number of complete paths.
758 static int is_connected_input_ep(struct snd_soc_dapm_widget
*widget
)
760 struct snd_soc_dapm_path
*path
;
763 if (widget
->inputs
>= 0)
764 return widget
->inputs
;
766 DAPM_UPDATE_STAT(widget
, path_checks
);
768 switch (widget
->id
) {
769 case snd_soc_dapm_supply
:
770 case snd_soc_dapm_regulator_supply
:
776 /* active stream ? */
777 switch (widget
->id
) {
778 case snd_soc_dapm_dac
:
779 case snd_soc_dapm_aif_in
:
780 case snd_soc_dapm_dai
:
781 if (widget
->active
) {
782 widget
->inputs
= snd_soc_dapm_suspend_check(widget
);
783 return widget
->inputs
;
789 if (widget
->connected
) {
790 /* connected pin ? */
791 if (widget
->id
== snd_soc_dapm_input
&& !widget
->ext
) {
792 widget
->inputs
= snd_soc_dapm_suspend_check(widget
);
793 return widget
->inputs
;
796 /* connected VMID/Bias for lower pops */
797 if (widget
->id
== snd_soc_dapm_vmid
) {
798 widget
->inputs
= snd_soc_dapm_suspend_check(widget
);
799 return widget
->inputs
;
802 /* connected jack ? */
803 if (widget
->id
== snd_soc_dapm_mic
||
804 (widget
->id
== snd_soc_dapm_line
&&
805 !list_empty(&widget
->sinks
))) {
806 widget
->inputs
= snd_soc_dapm_suspend_check(widget
);
807 return widget
->inputs
;
810 /* signal generator */
811 if (widget
->id
== snd_soc_dapm_siggen
) {
812 widget
->inputs
= snd_soc_dapm_suspend_check(widget
);
813 return widget
->inputs
;
817 list_for_each_entry(path
, &widget
->sources
, list_sink
) {
818 DAPM_UPDATE_STAT(widget
, neighbour_checks
);
826 if (path
->source
&& path
->connect
) {
828 con
+= is_connected_input_ep(path
->source
);
832 widget
->inputs
= con
;
838 * Handler for generic register modifier widget.
840 int dapm_reg_event(struct snd_soc_dapm_widget
*w
,
841 struct snd_kcontrol
*kcontrol
, int event
)
845 if (SND_SOC_DAPM_EVENT_ON(event
))
850 soc_widget_update_bits(w
, -(w
->reg
+ 1),
851 w
->mask
<< w
->shift
, val
<< w
->shift
);
855 EXPORT_SYMBOL_GPL(dapm_reg_event
);
858 * Handler for regulator supply widget.
860 int dapm_regulator_event(struct snd_soc_dapm_widget
*w
,
861 struct snd_kcontrol
*kcontrol
, int event
)
863 if (SND_SOC_DAPM_EVENT_ON(event
))
864 return regulator_enable(w
->priv
);
866 return regulator_disable_deferred(w
->priv
, w
->shift
);
868 EXPORT_SYMBOL_GPL(dapm_regulator_event
);
870 static int dapm_widget_power_check(struct snd_soc_dapm_widget
*w
)
872 if (w
->power_checked
)
878 w
->new_power
= w
->power_check(w
);
880 w
->power_checked
= true;
885 /* Generic check to see if a widget should be powered.
887 static int dapm_generic_check_power(struct snd_soc_dapm_widget
*w
)
891 DAPM_UPDATE_STAT(w
, power_checks
);
893 in
= is_connected_input_ep(w
);
894 dapm_clear_walk(w
->dapm
);
895 out
= is_connected_output_ep(w
);
896 dapm_clear_walk(w
->dapm
);
897 return out
!= 0 && in
!= 0;
900 static int dapm_dai_check_power(struct snd_soc_dapm_widget
*w
)
902 DAPM_UPDATE_STAT(w
, power_checks
);
907 /* Check to see if an ADC has power */
908 static int dapm_adc_check_power(struct snd_soc_dapm_widget
*w
)
912 DAPM_UPDATE_STAT(w
, power_checks
);
915 in
= is_connected_input_ep(w
);
916 dapm_clear_walk(w
->dapm
);
919 return dapm_generic_check_power(w
);
923 /* Check to see if a DAC has power */
924 static int dapm_dac_check_power(struct snd_soc_dapm_widget
*w
)
928 DAPM_UPDATE_STAT(w
, power_checks
);
931 out
= is_connected_output_ep(w
);
932 dapm_clear_walk(w
->dapm
);
935 return dapm_generic_check_power(w
);
939 /* Check to see if a power supply is needed */
940 static int dapm_supply_check_power(struct snd_soc_dapm_widget
*w
)
942 struct snd_soc_dapm_path
*path
;
944 DAPM_UPDATE_STAT(w
, power_checks
);
946 /* Check if one of our outputs is connected */
947 list_for_each_entry(path
, &w
->sinks
, list_source
) {
948 DAPM_UPDATE_STAT(w
, neighbour_checks
);
953 if (path
->connected
&&
954 !path
->connected(path
->source
, path
->sink
))
960 if (dapm_widget_power_check(path
->sink
))
964 dapm_clear_walk(w
->dapm
);
969 static int dapm_always_on_check_power(struct snd_soc_dapm_widget
*w
)
974 static int dapm_seq_compare(struct snd_soc_dapm_widget
*a
,
975 struct snd_soc_dapm_widget
*b
,
983 sort
= dapm_down_seq
;
985 if (sort
[a
->id
] != sort
[b
->id
])
986 return sort
[a
->id
] - sort
[b
->id
];
987 if (a
->subseq
!= b
->subseq
) {
989 return a
->subseq
- b
->subseq
;
991 return b
->subseq
- a
->subseq
;
993 if (a
->reg
!= b
->reg
)
994 return a
->reg
- b
->reg
;
995 if (a
->dapm
!= b
->dapm
)
996 return (unsigned long)a
->dapm
- (unsigned long)b
->dapm
;
1001 /* Insert a widget in order into a DAPM power sequence. */
1002 static void dapm_seq_insert(struct snd_soc_dapm_widget
*new_widget
,
1003 struct list_head
*list
,
1006 struct snd_soc_dapm_widget
*w
;
1008 list_for_each_entry(w
, list
, power_list
)
1009 if (dapm_seq_compare(new_widget
, w
, power_up
) < 0) {
1010 list_add_tail(&new_widget
->power_list
, &w
->power_list
);
1014 list_add_tail(&new_widget
->power_list
, list
);
1017 static void dapm_seq_check_event(struct snd_soc_dapm_context
*dapm
,
1018 struct snd_soc_dapm_widget
*w
, int event
)
1020 struct snd_soc_card
*card
= dapm
->card
;
1021 const char *ev_name
;
1025 case SND_SOC_DAPM_PRE_PMU
:
1026 ev_name
= "PRE_PMU";
1029 case SND_SOC_DAPM_POST_PMU
:
1030 ev_name
= "POST_PMU";
1033 case SND_SOC_DAPM_PRE_PMD
:
1034 ev_name
= "PRE_PMD";
1037 case SND_SOC_DAPM_POST_PMD
:
1038 ev_name
= "POST_PMD";
1046 if (w
->power
!= power
)
1049 if (w
->event
&& (w
->event_flags
& event
)) {
1050 pop_dbg(dapm
->dev
, card
->pop_time
, "pop test : %s %s\n",
1052 trace_snd_soc_dapm_widget_event_start(w
, event
);
1053 ret
= w
->event(w
, NULL
, event
);
1054 trace_snd_soc_dapm_widget_event_done(w
, event
);
1056 pr_err("%s: %s event failed: %d\n",
1057 ev_name
, w
->name
, ret
);
1061 /* Apply the coalesced changes from a DAPM sequence */
1062 static void dapm_seq_run_coalesced(struct snd_soc_dapm_context
*dapm
,
1063 struct list_head
*pending
)
1065 struct snd_soc_card
*card
= dapm
->card
;
1066 struct snd_soc_dapm_widget
*w
;
1068 unsigned int value
= 0;
1069 unsigned int mask
= 0;
1070 unsigned int cur_mask
;
1072 reg
= list_first_entry(pending
, struct snd_soc_dapm_widget
,
1075 list_for_each_entry(w
, pending
, power_list
) {
1076 cur_mask
= 1 << w
->shift
;
1077 BUG_ON(reg
!= w
->reg
);
1088 pop_dbg(dapm
->dev
, card
->pop_time
,
1089 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
1090 w
->name
, reg
, value
, mask
);
1092 /* Check for events */
1093 dapm_seq_check_event(dapm
, w
, SND_SOC_DAPM_PRE_PMU
);
1094 dapm_seq_check_event(dapm
, w
, SND_SOC_DAPM_PRE_PMD
);
1098 /* Any widget will do, they should all be updating the
1101 w
= list_first_entry(pending
, struct snd_soc_dapm_widget
,
1104 pop_dbg(dapm
->dev
, card
->pop_time
,
1105 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
1106 value
, mask
, reg
, card
->pop_time
);
1107 pop_wait(card
->pop_time
);
1108 soc_widget_update_bits(w
, reg
, mask
, value
);
1111 list_for_each_entry(w
, pending
, power_list
) {
1112 dapm_seq_check_event(dapm
, w
, SND_SOC_DAPM_POST_PMU
);
1113 dapm_seq_check_event(dapm
, w
, SND_SOC_DAPM_POST_PMD
);
1117 /* Apply a DAPM power sequence.
1119 * We walk over a pre-sorted list of widgets to apply power to. In
1120 * order to minimise the number of writes to the device required
1121 * multiple widgets will be updated in a single write where possible.
1122 * Currently anything that requires more than a single write is not
1125 static void dapm_seq_run(struct snd_soc_dapm_context
*dapm
,
1126 struct list_head
*list
, int event
, bool power_up
)
1128 struct snd_soc_dapm_widget
*w
, *n
;
1131 int cur_subseq
= -1;
1132 int cur_reg
= SND_SOC_NOPM
;
1133 struct snd_soc_dapm_context
*cur_dapm
= NULL
;
1140 sort
= dapm_down_seq
;
1142 list_for_each_entry_safe(w
, n
, list
, power_list
) {
1145 /* Do we need to apply any queued changes? */
1146 if (sort
[w
->id
] != cur_sort
|| w
->reg
!= cur_reg
||
1147 w
->dapm
!= cur_dapm
|| w
->subseq
!= cur_subseq
) {
1148 if (!list_empty(&pending
))
1149 dapm_seq_run_coalesced(cur_dapm
, &pending
);
1151 if (cur_dapm
&& cur_dapm
->seq_notifier
) {
1152 for (i
= 0; i
< ARRAY_SIZE(dapm_up_seq
); i
++)
1153 if (sort
[i
] == cur_sort
)
1154 cur_dapm
->seq_notifier(cur_dapm
,
1159 INIT_LIST_HEAD(&pending
);
1161 cur_subseq
= INT_MIN
;
1162 cur_reg
= SND_SOC_NOPM
;
1167 case snd_soc_dapm_pre
:
1169 list_for_each_entry_safe_continue(w
, n
, list
,
1172 if (event
== SND_SOC_DAPM_STREAM_START
)
1174 NULL
, SND_SOC_DAPM_PRE_PMU
);
1175 else if (event
== SND_SOC_DAPM_STREAM_STOP
)
1177 NULL
, SND_SOC_DAPM_PRE_PMD
);
1180 case snd_soc_dapm_post
:
1182 list_for_each_entry_safe_continue(w
, n
, list
,
1185 if (event
== SND_SOC_DAPM_STREAM_START
)
1187 NULL
, SND_SOC_DAPM_POST_PMU
);
1188 else if (event
== SND_SOC_DAPM_STREAM_STOP
)
1190 NULL
, SND_SOC_DAPM_POST_PMD
);
1194 /* Queue it up for application */
1195 cur_sort
= sort
[w
->id
];
1196 cur_subseq
= w
->subseq
;
1199 list_move(&w
->power_list
, &pending
);
1204 dev_err(w
->dapm
->dev
,
1205 "Failed to apply widget power: %d\n", ret
);
1208 if (!list_empty(&pending
))
1209 dapm_seq_run_coalesced(cur_dapm
, &pending
);
1211 if (cur_dapm
&& cur_dapm
->seq_notifier
) {
1212 for (i
= 0; i
< ARRAY_SIZE(dapm_up_seq
); i
++)
1213 if (sort
[i
] == cur_sort
)
1214 cur_dapm
->seq_notifier(cur_dapm
,
1219 static void dapm_widget_update(struct snd_soc_dapm_context
*dapm
)
1221 struct snd_soc_dapm_update
*update
= dapm
->update
;
1222 struct snd_soc_dapm_widget
*w
;
1231 (w
->event_flags
& SND_SOC_DAPM_PRE_REG
)) {
1232 ret
= w
->event(w
, update
->kcontrol
, SND_SOC_DAPM_PRE_REG
);
1234 pr_err("%s DAPM pre-event failed: %d\n",
1238 ret
= snd_soc_update_bits(w
->codec
, update
->reg
, update
->mask
,
1241 pr_err("%s DAPM update failed: %d\n", w
->name
, ret
);
1244 (w
->event_flags
& SND_SOC_DAPM_POST_REG
)) {
1245 ret
= w
->event(w
, update
->kcontrol
, SND_SOC_DAPM_POST_REG
);
1247 pr_err("%s DAPM post-event failed: %d\n",
1252 /* Async callback run prior to DAPM sequences - brings to _PREPARE if
1253 * they're changing state.
1255 static void dapm_pre_sequence_async(void *data
, async_cookie_t cookie
)
1257 struct snd_soc_dapm_context
*d
= data
;
1260 /* If we're off and we're not supposed to be go into STANDBY */
1261 if (d
->bias_level
== SND_SOC_BIAS_OFF
&&
1262 d
->target_bias_level
!= SND_SOC_BIAS_OFF
) {
1264 pm_runtime_get_sync(d
->dev
);
1266 ret
= snd_soc_dapm_set_bias_level(d
, SND_SOC_BIAS_STANDBY
);
1269 "Failed to turn on bias: %d\n", ret
);
1272 /* Prepare for a STADDBY->ON or ON->STANDBY transition */
1273 if (d
->bias_level
!= d
->target_bias_level
) {
1274 ret
= snd_soc_dapm_set_bias_level(d
, SND_SOC_BIAS_PREPARE
);
1277 "Failed to prepare bias: %d\n", ret
);
1281 /* Async callback run prior to DAPM sequences - brings to their final
1284 static void dapm_post_sequence_async(void *data
, async_cookie_t cookie
)
1286 struct snd_soc_dapm_context
*d
= data
;
1289 /* If we just powered the last thing off drop to standby bias */
1290 if (d
->bias_level
== SND_SOC_BIAS_PREPARE
&&
1291 (d
->target_bias_level
== SND_SOC_BIAS_STANDBY
||
1292 d
->target_bias_level
== SND_SOC_BIAS_OFF
)) {
1293 ret
= snd_soc_dapm_set_bias_level(d
, SND_SOC_BIAS_STANDBY
);
1295 dev_err(d
->dev
, "Failed to apply standby bias: %d\n",
1299 /* If we're in standby and can support bias off then do that */
1300 if (d
->bias_level
== SND_SOC_BIAS_STANDBY
&&
1301 d
->target_bias_level
== SND_SOC_BIAS_OFF
) {
1302 ret
= snd_soc_dapm_set_bias_level(d
, SND_SOC_BIAS_OFF
);
1304 dev_err(d
->dev
, "Failed to turn off bias: %d\n", ret
);
1307 pm_runtime_put(d
->dev
);
1310 /* If we just powered up then move to active bias */
1311 if (d
->bias_level
== SND_SOC_BIAS_PREPARE
&&
1312 d
->target_bias_level
== SND_SOC_BIAS_ON
) {
1313 ret
= snd_soc_dapm_set_bias_level(d
, SND_SOC_BIAS_ON
);
1315 dev_err(d
->dev
, "Failed to apply active bias: %d\n",
1320 static void dapm_widget_set_peer_power(struct snd_soc_dapm_widget
*peer
,
1321 bool power
, bool connect
)
1323 /* If a connection is being made or broken then that update
1324 * will have marked the peer dirty, otherwise the widgets are
1325 * not connected and this update has no impact. */
1329 /* If the peer is already in the state we're moving to then we
1330 * won't have an impact on it. */
1331 if (power
!= peer
->power
)
1332 dapm_mark_dirty(peer
, "peer state change");
1335 static void dapm_widget_set_power(struct snd_soc_dapm_widget
*w
, bool power
,
1336 struct list_head
*up_list
,
1337 struct list_head
*down_list
)
1339 struct snd_soc_dapm_path
*path
;
1341 if (w
->power
== power
)
1344 trace_snd_soc_dapm_widget_power(w
, power
);
1346 /* If we changed our power state perhaps our neigbours changed
1349 list_for_each_entry(path
, &w
->sources
, list_sink
) {
1351 dapm_widget_set_peer_power(path
->source
, power
,
1356 case snd_soc_dapm_supply
:
1357 case snd_soc_dapm_regulator_supply
:
1358 /* Supplies can't affect their outputs, only their inputs */
1361 list_for_each_entry(path
, &w
->sinks
, list_source
) {
1363 dapm_widget_set_peer_power(path
->sink
, power
,
1371 dapm_seq_insert(w
, up_list
, true);
1373 dapm_seq_insert(w
, down_list
, false);
1378 static void dapm_power_one_widget(struct snd_soc_dapm_widget
*w
,
1379 struct list_head
*up_list
,
1380 struct list_head
*down_list
)
1385 case snd_soc_dapm_pre
:
1386 dapm_seq_insert(w
, down_list
, false);
1388 case snd_soc_dapm_post
:
1389 dapm_seq_insert(w
, up_list
, true);
1393 power
= dapm_widget_power_check(w
);
1395 dapm_widget_set_power(w
, power
, up_list
, down_list
);
1401 * Scan each dapm widget for complete audio path.
1402 * A complete path is a route that has valid endpoints i.e.:-
1404 * o DAC to output pin.
1405 * o Input Pin to ADC.
1406 * o Input pin to Output pin (bypass, sidetone)
1407 * o DAC to ADC (loopback).
1409 static int dapm_power_widgets(struct snd_soc_dapm_context
*dapm
, int event
)
1411 struct snd_soc_card
*card
= dapm
->card
;
1412 struct snd_soc_dapm_widget
*w
;
1413 struct snd_soc_dapm_context
*d
;
1415 LIST_HEAD(down_list
);
1416 LIST_HEAD(async_domain
);
1417 enum snd_soc_bias_level bias
;
1419 trace_snd_soc_dapm_start(card
);
1421 list_for_each_entry(d
, &card
->dapm_list
, list
) {
1422 if (d
->n_widgets
|| d
->codec
== NULL
) {
1423 if (d
->idle_bias_off
)
1424 d
->target_bias_level
= SND_SOC_BIAS_OFF
;
1426 d
->target_bias_level
= SND_SOC_BIAS_STANDBY
;
1432 /* Check which widgets we need to power and store them in
1433 * lists indicating if they should be powered up or down. We
1434 * only check widgets that have been flagged as dirty but note
1435 * that new widgets may be added to the dirty list while we
1438 list_for_each_entry(w
, &card
->dapm_dirty
, dirty
) {
1439 dapm_power_one_widget(w
, &up_list
, &down_list
);
1442 list_for_each_entry(w
, &card
->widgets
, list
) {
1443 list_del_init(&w
->dirty
);
1448 /* Supplies and micbiases only bring the
1449 * context up to STANDBY as unless something
1450 * else is active and passing audio they
1451 * generally don't require full power. Signal
1452 * generators are virtual pins and have no
1453 * power impact themselves.
1456 case snd_soc_dapm_siggen
:
1458 case snd_soc_dapm_supply
:
1459 case snd_soc_dapm_regulator_supply
:
1460 case snd_soc_dapm_micbias
:
1461 if (d
->target_bias_level
< SND_SOC_BIAS_STANDBY
)
1462 d
->target_bias_level
= SND_SOC_BIAS_STANDBY
;
1465 d
->target_bias_level
= SND_SOC_BIAS_ON
;
1472 /* If there are no DAPM widgets then try to figure out power from the
1475 if (!dapm
->n_widgets
) {
1477 case SND_SOC_DAPM_STREAM_START
:
1478 case SND_SOC_DAPM_STREAM_RESUME
:
1479 dapm
->target_bias_level
= SND_SOC_BIAS_ON
;
1481 case SND_SOC_DAPM_STREAM_STOP
:
1482 if (dapm
->codec
&& dapm
->codec
->active
)
1483 dapm
->target_bias_level
= SND_SOC_BIAS_ON
;
1485 dapm
->target_bias_level
= SND_SOC_BIAS_STANDBY
;
1487 case SND_SOC_DAPM_STREAM_SUSPEND
:
1488 dapm
->target_bias_level
= SND_SOC_BIAS_STANDBY
;
1490 case SND_SOC_DAPM_STREAM_NOP
:
1491 dapm
->target_bias_level
= dapm
->bias_level
;
1498 /* Force all contexts in the card to the same bias state if
1499 * they're not ground referenced.
1501 bias
= SND_SOC_BIAS_OFF
;
1502 list_for_each_entry(d
, &card
->dapm_list
, list
)
1503 if (d
->target_bias_level
> bias
)
1504 bias
= d
->target_bias_level
;
1505 list_for_each_entry(d
, &card
->dapm_list
, list
)
1506 if (!d
->idle_bias_off
)
1507 d
->target_bias_level
= bias
;
1509 trace_snd_soc_dapm_walk_done(card
);
1511 /* Run all the bias changes in parallel */
1512 list_for_each_entry(d
, &dapm
->card
->dapm_list
, list
)
1513 async_schedule_domain(dapm_pre_sequence_async
, d
,
1515 async_synchronize_full_domain(&async_domain
);
1517 /* Power down widgets first; try to avoid amplifying pops. */
1518 dapm_seq_run(dapm
, &down_list
, event
, false);
1520 dapm_widget_update(dapm
);
1523 dapm_seq_run(dapm
, &up_list
, event
, true);
1525 /* Run all the bias changes in parallel */
1526 list_for_each_entry(d
, &dapm
->card
->dapm_list
, list
)
1527 async_schedule_domain(dapm_post_sequence_async
, d
,
1529 async_synchronize_full_domain(&async_domain
);
1531 /* do we need to notify any clients that DAPM event is complete */
1532 list_for_each_entry(d
, &card
->dapm_list
, list
) {
1533 if (d
->stream_event
)
1534 d
->stream_event(d
, event
);
1537 pop_dbg(dapm
->dev
, card
->pop_time
,
1538 "DAPM sequencing finished, waiting %dms\n", card
->pop_time
);
1539 pop_wait(card
->pop_time
);
1541 trace_snd_soc_dapm_done(card
);
1546 #ifdef CONFIG_DEBUG_FS
1547 static int dapm_widget_power_open_file(struct inode
*inode
, struct file
*file
)
1549 file
->private_data
= inode
->i_private
;
1553 static ssize_t
dapm_widget_power_read_file(struct file
*file
,
1554 char __user
*user_buf
,
1555 size_t count
, loff_t
*ppos
)
1557 struct snd_soc_dapm_widget
*w
= file
->private_data
;
1561 struct snd_soc_dapm_path
*p
= NULL
;
1563 buf
= kmalloc(PAGE_SIZE
, GFP_KERNEL
);
1567 in
= is_connected_input_ep(w
);
1568 dapm_clear_walk(w
->dapm
);
1569 out
= is_connected_output_ep(w
);
1570 dapm_clear_walk(w
->dapm
);
1572 ret
= snprintf(buf
, PAGE_SIZE
, "%s: %s%s in %d out %d",
1573 w
->name
, w
->power
? "On" : "Off",
1574 w
->force
? " (forced)" : "", in
, out
);
1577 ret
+= snprintf(buf
+ ret
, PAGE_SIZE
- ret
,
1578 " - R%d(0x%x) bit %d",
1579 w
->reg
, w
->reg
, w
->shift
);
1581 ret
+= snprintf(buf
+ ret
, PAGE_SIZE
- ret
, "\n");
1584 ret
+= snprintf(buf
+ ret
, PAGE_SIZE
- ret
, " stream %s %s\n",
1586 w
->active
? "active" : "inactive");
1588 list_for_each_entry(p
, &w
->sources
, list_sink
) {
1589 if (p
->connected
&& !p
->connected(w
, p
->sink
))
1593 ret
+= snprintf(buf
+ ret
, PAGE_SIZE
- ret
,
1594 " in \"%s\" \"%s\"\n",
1595 p
->name
? p
->name
: "static",
1598 list_for_each_entry(p
, &w
->sinks
, list_source
) {
1599 if (p
->connected
&& !p
->connected(w
, p
->sink
))
1603 ret
+= snprintf(buf
+ ret
, PAGE_SIZE
- ret
,
1604 " out \"%s\" \"%s\"\n",
1605 p
->name
? p
->name
: "static",
1609 ret
= simple_read_from_buffer(user_buf
, count
, ppos
, buf
, ret
);
1615 static const struct file_operations dapm_widget_power_fops
= {
1616 .open
= dapm_widget_power_open_file
,
1617 .read
= dapm_widget_power_read_file
,
1618 .llseek
= default_llseek
,
1621 static int dapm_bias_open_file(struct inode
*inode
, struct file
*file
)
1623 file
->private_data
= inode
->i_private
;
1627 static ssize_t
dapm_bias_read_file(struct file
*file
, char __user
*user_buf
,
1628 size_t count
, loff_t
*ppos
)
1630 struct snd_soc_dapm_context
*dapm
= file
->private_data
;
1633 switch (dapm
->bias_level
) {
1634 case SND_SOC_BIAS_ON
:
1637 case SND_SOC_BIAS_PREPARE
:
1638 level
= "Prepare\n";
1640 case SND_SOC_BIAS_STANDBY
:
1641 level
= "Standby\n";
1643 case SND_SOC_BIAS_OFF
:
1648 level
= "Unknown\n";
1652 return simple_read_from_buffer(user_buf
, count
, ppos
, level
,
1656 static const struct file_operations dapm_bias_fops
= {
1657 .open
= dapm_bias_open_file
,
1658 .read
= dapm_bias_read_file
,
1659 .llseek
= default_llseek
,
1662 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context
*dapm
,
1663 struct dentry
*parent
)
1667 dapm
->debugfs_dapm
= debugfs_create_dir("dapm", parent
);
1669 if (!dapm
->debugfs_dapm
) {
1671 "Failed to create DAPM debugfs directory\n");
1675 d
= debugfs_create_file("bias_level", 0444,
1676 dapm
->debugfs_dapm
, dapm
,
1680 "ASoC: Failed to create bias level debugfs file\n");
1683 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget
*w
)
1685 struct snd_soc_dapm_context
*dapm
= w
->dapm
;
1688 if (!dapm
->debugfs_dapm
|| !w
->name
)
1691 d
= debugfs_create_file(w
->name
, 0444,
1692 dapm
->debugfs_dapm
, w
,
1693 &dapm_widget_power_fops
);
1695 dev_warn(w
->dapm
->dev
,
1696 "ASoC: Failed to create %s debugfs file\n",
1700 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context
*dapm
)
1702 debugfs_remove_recursive(dapm
->debugfs_dapm
);
1706 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context
*dapm
,
1707 struct dentry
*parent
)
1711 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget
*w
)
1715 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context
*dapm
)
1721 /* test and update the power status of a mux widget */
1722 int snd_soc_dapm_mux_update_power(struct snd_soc_dapm_widget
*widget
,
1723 struct snd_kcontrol
*kcontrol
, int mux
, struct soc_enum
*e
)
1725 struct snd_soc_dapm_path
*path
;
1728 if (widget
->id
!= snd_soc_dapm_mux
&&
1729 widget
->id
!= snd_soc_dapm_virt_mux
&&
1730 widget
->id
!= snd_soc_dapm_value_mux
)
1733 /* find dapm widget path assoc with kcontrol */
1734 list_for_each_entry(path
, &widget
->dapm
->card
->paths
, list
) {
1735 if (path
->kcontrol
!= kcontrol
)
1738 if (!path
->name
|| !e
->texts
[mux
])
1742 /* we now need to match the string in the enum to the path */
1743 if (!(strcmp(path
->name
, e
->texts
[mux
]))) {
1744 path
->connect
= 1; /* new connection */
1745 dapm_mark_dirty(path
->source
, "mux connection");
1748 dapm_mark_dirty(path
->source
,
1749 "mux disconnection");
1750 path
->connect
= 0; /* old connection must be powered down */
1755 dapm_mark_dirty(widget
, "mux change");
1756 dapm_power_widgets(widget
->dapm
, SND_SOC_DAPM_STREAM_NOP
);
1761 EXPORT_SYMBOL_GPL(snd_soc_dapm_mux_update_power
);
1763 /* test and update the power status of a mixer or switch widget */
1764 int snd_soc_dapm_mixer_update_power(struct snd_soc_dapm_widget
*widget
,
1765 struct snd_kcontrol
*kcontrol
, int connect
)
1767 struct snd_soc_dapm_path
*path
;
1770 if (widget
->id
!= snd_soc_dapm_mixer
&&
1771 widget
->id
!= snd_soc_dapm_mixer_named_ctl
&&
1772 widget
->id
!= snd_soc_dapm_switch
)
1775 /* find dapm widget path assoc with kcontrol */
1776 list_for_each_entry(path
, &widget
->dapm
->card
->paths
, list
) {
1777 if (path
->kcontrol
!= kcontrol
)
1780 /* found, now check type */
1782 path
->connect
= connect
;
1783 dapm_mark_dirty(path
->source
, "mixer connection");
1787 dapm_mark_dirty(widget
, "mixer update");
1788 dapm_power_widgets(widget
->dapm
, SND_SOC_DAPM_STREAM_NOP
);
1793 EXPORT_SYMBOL_GPL(snd_soc_dapm_mixer_update_power
);
1795 /* show dapm widget status in sys fs */
1796 static ssize_t
dapm_widget_show(struct device
*dev
,
1797 struct device_attribute
*attr
, char *buf
)
1799 struct snd_soc_pcm_runtime
*rtd
= dev_get_drvdata(dev
);
1800 struct snd_soc_codec
*codec
=rtd
->codec
;
1801 struct snd_soc_dapm_widget
*w
;
1803 char *state
= "not set";
1805 list_for_each_entry(w
, &codec
->card
->widgets
, list
) {
1806 if (w
->dapm
!= &codec
->dapm
)
1809 /* only display widgets that burnm power */
1811 case snd_soc_dapm_hp
:
1812 case snd_soc_dapm_mic
:
1813 case snd_soc_dapm_spk
:
1814 case snd_soc_dapm_line
:
1815 case snd_soc_dapm_micbias
:
1816 case snd_soc_dapm_dac
:
1817 case snd_soc_dapm_adc
:
1818 case snd_soc_dapm_pga
:
1819 case snd_soc_dapm_out_drv
:
1820 case snd_soc_dapm_mixer
:
1821 case snd_soc_dapm_mixer_named_ctl
:
1822 case snd_soc_dapm_supply
:
1823 case snd_soc_dapm_regulator_supply
:
1825 count
+= sprintf(buf
+ count
, "%s: %s\n",
1826 w
->name
, w
->power
? "On":"Off");
1833 switch (codec
->dapm
.bias_level
) {
1834 case SND_SOC_BIAS_ON
:
1837 case SND_SOC_BIAS_PREPARE
:
1840 case SND_SOC_BIAS_STANDBY
:
1843 case SND_SOC_BIAS_OFF
:
1847 count
+= sprintf(buf
+ count
, "PM State: %s\n", state
);
1852 static DEVICE_ATTR(dapm_widget
, 0444, dapm_widget_show
, NULL
);
1854 int snd_soc_dapm_sys_add(struct device
*dev
)
1856 return device_create_file(dev
, &dev_attr_dapm_widget
);
1859 static void snd_soc_dapm_sys_remove(struct device
*dev
)
1861 device_remove_file(dev
, &dev_attr_dapm_widget
);
1864 /* free all dapm widgets and resources */
1865 static void dapm_free_widgets(struct snd_soc_dapm_context
*dapm
)
1867 struct snd_soc_dapm_widget
*w
, *next_w
;
1868 struct snd_soc_dapm_path
*p
, *next_p
;
1870 list_for_each_entry_safe(w
, next_w
, &dapm
->card
->widgets
, list
) {
1871 if (w
->dapm
!= dapm
)
1875 * remove source and sink paths associated to this widget.
1876 * While removing the path, remove reference to it from both
1877 * source and sink widgets so that path is removed only once.
1879 list_for_each_entry_safe(p
, next_p
, &w
->sources
, list_sink
) {
1880 list_del(&p
->list_sink
);
1881 list_del(&p
->list_source
);
1883 kfree(p
->long_name
);
1886 list_for_each_entry_safe(p
, next_p
, &w
->sinks
, list_source
) {
1887 list_del(&p
->list_sink
);
1888 list_del(&p
->list_source
);
1890 kfree(p
->long_name
);
1893 kfree(w
->kcontrols
);
1899 static struct snd_soc_dapm_widget
*dapm_find_widget(
1900 struct snd_soc_dapm_context
*dapm
, const char *pin
,
1901 bool search_other_contexts
)
1903 struct snd_soc_dapm_widget
*w
;
1904 struct snd_soc_dapm_widget
*fallback
= NULL
;
1906 list_for_each_entry(w
, &dapm
->card
->widgets
, list
) {
1907 if (!strcmp(w
->name
, pin
)) {
1908 if (w
->dapm
== dapm
)
1915 if (search_other_contexts
)
1921 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context
*dapm
,
1922 const char *pin
, int status
)
1924 struct snd_soc_dapm_widget
*w
= dapm_find_widget(dapm
, pin
, true);
1927 dev_err(dapm
->dev
, "dapm: unknown pin %s\n", pin
);
1931 if (w
->connected
!= status
)
1932 dapm_mark_dirty(w
, "pin configuration");
1934 w
->connected
= status
;
1942 * snd_soc_dapm_sync - scan and power dapm paths
1943 * @dapm: DAPM context
1945 * Walks all dapm audio paths and powers widgets according to their
1946 * stream or path usage.
1948 * Returns 0 for success.
1950 int snd_soc_dapm_sync(struct snd_soc_dapm_context
*dapm
)
1953 * Suppress early reports (eg, jacks syncing their state) to avoid
1954 * silly DAPM runs during card startup.
1956 if (!dapm
->card
|| !dapm
->card
->instantiated
)
1959 return dapm_power_widgets(dapm
, SND_SOC_DAPM_STREAM_NOP
);
1961 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync
);
1963 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context
*dapm
,
1964 const struct snd_soc_dapm_route
*route
)
1966 struct snd_soc_dapm_path
*path
;
1967 struct snd_soc_dapm_widget
*wsource
= NULL
, *wsink
= NULL
, *w
;
1968 struct snd_soc_dapm_widget
*wtsource
= NULL
, *wtsink
= NULL
;
1970 const char *control
= route
->control
;
1972 char prefixed_sink
[80];
1973 char prefixed_source
[80];
1976 if (dapm
->codec
&& dapm
->codec
->name_prefix
) {
1977 snprintf(prefixed_sink
, sizeof(prefixed_sink
), "%s %s",
1978 dapm
->codec
->name_prefix
, route
->sink
);
1979 sink
= prefixed_sink
;
1980 snprintf(prefixed_source
, sizeof(prefixed_source
), "%s %s",
1981 dapm
->codec
->name_prefix
, route
->source
);
1982 source
= prefixed_source
;
1985 source
= route
->source
;
1989 * find src and dest widgets over all widgets but favor a widget from
1990 * current DAPM context
1992 list_for_each_entry(w
, &dapm
->card
->widgets
, list
) {
1993 if (!wsink
&& !(strcmp(w
->name
, sink
))) {
1995 if (w
->dapm
== dapm
)
1999 if (!wsource
&& !(strcmp(w
->name
, source
))) {
2001 if (w
->dapm
== dapm
)
2005 /* use widget from another DAPM context if not found from this */
2011 if (wsource
== NULL
|| wsink
== NULL
)
2014 path
= kzalloc(sizeof(struct snd_soc_dapm_path
), GFP_KERNEL
);
2018 path
->source
= wsource
;
2020 path
->connected
= route
->connected
;
2021 INIT_LIST_HEAD(&path
->list
);
2022 INIT_LIST_HEAD(&path
->list_source
);
2023 INIT_LIST_HEAD(&path
->list_sink
);
2025 /* check for external widgets */
2026 if (wsink
->id
== snd_soc_dapm_input
) {
2027 if (wsource
->id
== snd_soc_dapm_micbias
||
2028 wsource
->id
== snd_soc_dapm_mic
||
2029 wsource
->id
== snd_soc_dapm_line
||
2030 wsource
->id
== snd_soc_dapm_output
)
2033 if (wsource
->id
== snd_soc_dapm_output
) {
2034 if (wsink
->id
== snd_soc_dapm_spk
||
2035 wsink
->id
== snd_soc_dapm_hp
||
2036 wsink
->id
== snd_soc_dapm_line
||
2037 wsink
->id
== snd_soc_dapm_input
)
2041 /* connect static paths */
2042 if (control
== NULL
) {
2043 list_add(&path
->list
, &dapm
->card
->paths
);
2044 list_add(&path
->list_sink
, &wsink
->sources
);
2045 list_add(&path
->list_source
, &wsource
->sinks
);
2050 /* connect dynamic paths */
2051 switch (wsink
->id
) {
2052 case snd_soc_dapm_adc
:
2053 case snd_soc_dapm_dac
:
2054 case snd_soc_dapm_pga
:
2055 case snd_soc_dapm_out_drv
:
2056 case snd_soc_dapm_input
:
2057 case snd_soc_dapm_output
:
2058 case snd_soc_dapm_siggen
:
2059 case snd_soc_dapm_micbias
:
2060 case snd_soc_dapm_vmid
:
2061 case snd_soc_dapm_pre
:
2062 case snd_soc_dapm_post
:
2063 case snd_soc_dapm_supply
:
2064 case snd_soc_dapm_regulator_supply
:
2065 case snd_soc_dapm_aif_in
:
2066 case snd_soc_dapm_aif_out
:
2067 case snd_soc_dapm_dai
:
2068 list_add(&path
->list
, &dapm
->card
->paths
);
2069 list_add(&path
->list_sink
, &wsink
->sources
);
2070 list_add(&path
->list_source
, &wsource
->sinks
);
2073 case snd_soc_dapm_mux
:
2074 case snd_soc_dapm_virt_mux
:
2075 case snd_soc_dapm_value_mux
:
2076 ret
= dapm_connect_mux(dapm
, wsource
, wsink
, path
, control
,
2077 &wsink
->kcontrol_news
[0]);
2081 case snd_soc_dapm_switch
:
2082 case snd_soc_dapm_mixer
:
2083 case snd_soc_dapm_mixer_named_ctl
:
2084 ret
= dapm_connect_mixer(dapm
, wsource
, wsink
, path
, control
);
2088 case snd_soc_dapm_hp
:
2089 case snd_soc_dapm_mic
:
2090 case snd_soc_dapm_line
:
2091 case snd_soc_dapm_spk
:
2092 list_add(&path
->list
, &dapm
->card
->paths
);
2093 list_add(&path
->list_sink
, &wsink
->sources
);
2094 list_add(&path
->list_source
, &wsource
->sinks
);
2101 dev_warn(dapm
->dev
, "asoc: no dapm match for %s --> %s --> %s\n",
2102 source
, control
, sink
);
2108 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
2109 * @dapm: DAPM context
2110 * @route: audio routes
2111 * @num: number of routes
2113 * Connects 2 dapm widgets together via a named audio path. The sink is
2114 * the widget receiving the audio signal, whilst the source is the sender
2115 * of the audio signal.
2117 * Returns 0 for success else error. On error all resources can be freed
2118 * with a call to snd_soc_card_free().
2120 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context
*dapm
,
2121 const struct snd_soc_dapm_route
*route
, int num
)
2125 for (i
= 0; i
< num
; i
++) {
2126 ret
= snd_soc_dapm_add_route(dapm
, route
);
2128 dev_err(dapm
->dev
, "Failed to add route %s->%s\n",
2129 route
->source
, route
->sink
);
2137 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes
);
2139 static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context
*dapm
,
2140 const struct snd_soc_dapm_route
*route
)
2142 struct snd_soc_dapm_widget
*source
= dapm_find_widget(dapm
,
2145 struct snd_soc_dapm_widget
*sink
= dapm_find_widget(dapm
,
2148 struct snd_soc_dapm_path
*path
;
2152 dev_err(dapm
->dev
, "Unable to find source %s for weak route\n",
2158 dev_err(dapm
->dev
, "Unable to find sink %s for weak route\n",
2163 if (route
->control
|| route
->connected
)
2164 dev_warn(dapm
->dev
, "Ignoring control for weak route %s->%s\n",
2165 route
->source
, route
->sink
);
2167 list_for_each_entry(path
, &source
->sinks
, list_source
) {
2168 if (path
->sink
== sink
) {
2175 dev_err(dapm
->dev
, "No path found for weak route %s->%s\n",
2176 route
->source
, route
->sink
);
2178 dev_warn(dapm
->dev
, "%d paths found for weak route %s->%s\n",
2179 count
, route
->source
, route
->sink
);
2185 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
2186 * @dapm: DAPM context
2187 * @route: audio routes
2188 * @num: number of routes
2190 * Mark existing routes matching those specified in the passed array
2191 * as being weak, meaning that they are ignored for the purpose of
2192 * power decisions. The main intended use case is for sidetone paths
2193 * which couple audio between other independent paths if they are both
2194 * active in order to make the combination work better at the user
2195 * level but which aren't intended to be "used".
2197 * Note that CODEC drivers should not use this as sidetone type paths
2198 * can frequently also be used as bypass paths.
2200 int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context
*dapm
,
2201 const struct snd_soc_dapm_route
*route
, int num
)
2206 for (i
= 0; i
< num
; i
++) {
2207 err
= snd_soc_dapm_weak_route(dapm
, route
);
2215 EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes
);
2218 * snd_soc_dapm_new_widgets - add new dapm widgets
2219 * @dapm: DAPM context
2221 * Checks the codec for any new dapm widgets and creates them if found.
2223 * Returns 0 for success.
2225 int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context
*dapm
)
2227 struct snd_soc_dapm_widget
*w
;
2230 list_for_each_entry(w
, &dapm
->card
->widgets
, list
)
2235 if (w
->num_kcontrols
) {
2236 w
->kcontrols
= kzalloc(w
->num_kcontrols
*
2237 sizeof(struct snd_kcontrol
*),
2244 case snd_soc_dapm_switch
:
2245 case snd_soc_dapm_mixer
:
2246 case snd_soc_dapm_mixer_named_ctl
:
2249 case snd_soc_dapm_mux
:
2250 case snd_soc_dapm_virt_mux
:
2251 case snd_soc_dapm_value_mux
:
2254 case snd_soc_dapm_pga
:
2255 case snd_soc_dapm_out_drv
:
2262 /* Read the initial power state from the device */
2264 val
= soc_widget_read(w
, w
->reg
);
2265 val
&= 1 << w
->shift
;
2275 dapm_mark_dirty(w
, "new widget");
2276 dapm_debugfs_add_widget(w
);
2279 dapm_power_widgets(dapm
, SND_SOC_DAPM_STREAM_NOP
);
2282 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets
);
2285 * snd_soc_dapm_get_volsw - dapm mixer get callback
2286 * @kcontrol: mixer control
2287 * @ucontrol: control element information
2289 * Callback to get the value of a dapm mixer control.
2291 * Returns 0 for success.
2293 int snd_soc_dapm_get_volsw(struct snd_kcontrol
*kcontrol
,
2294 struct snd_ctl_elem_value
*ucontrol
)
2296 struct snd_soc_dapm_widget_list
*wlist
= snd_kcontrol_chip(kcontrol
);
2297 struct snd_soc_dapm_widget
*widget
= wlist
->widgets
[0];
2298 struct soc_mixer_control
*mc
=
2299 (struct soc_mixer_control
*)kcontrol
->private_value
;
2300 unsigned int reg
= mc
->reg
;
2301 unsigned int shift
= mc
->shift
;
2302 unsigned int rshift
= mc
->rshift
;
2304 unsigned int invert
= mc
->invert
;
2305 unsigned int mask
= (1 << fls(max
)) - 1;
2307 ucontrol
->value
.integer
.value
[0] =
2308 (snd_soc_read(widget
->codec
, reg
) >> shift
) & mask
;
2309 if (shift
!= rshift
)
2310 ucontrol
->value
.integer
.value
[1] =
2311 (snd_soc_read(widget
->codec
, reg
) >> rshift
) & mask
;
2313 ucontrol
->value
.integer
.value
[0] =
2314 max
- ucontrol
->value
.integer
.value
[0];
2315 if (shift
!= rshift
)
2316 ucontrol
->value
.integer
.value
[1] =
2317 max
- ucontrol
->value
.integer
.value
[1];
2322 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw
);
2325 * snd_soc_dapm_put_volsw - dapm mixer set callback
2326 * @kcontrol: mixer control
2327 * @ucontrol: control element information
2329 * Callback to set the value of a dapm mixer control.
2331 * Returns 0 for success.
2333 int snd_soc_dapm_put_volsw(struct snd_kcontrol
*kcontrol
,
2334 struct snd_ctl_elem_value
*ucontrol
)
2336 struct snd_soc_dapm_widget_list
*wlist
= snd_kcontrol_chip(kcontrol
);
2337 struct snd_soc_dapm_widget
*widget
= wlist
->widgets
[0];
2338 struct snd_soc_codec
*codec
= widget
->codec
;
2339 struct soc_mixer_control
*mc
=
2340 (struct soc_mixer_control
*)kcontrol
->private_value
;
2341 unsigned int reg
= mc
->reg
;
2342 unsigned int shift
= mc
->shift
;
2344 unsigned int mask
= (1 << fls(max
)) - 1;
2345 unsigned int invert
= mc
->invert
;
2347 int connect
, change
;
2348 struct snd_soc_dapm_update update
;
2351 val
= (ucontrol
->value
.integer
.value
[0] & mask
);
2355 mask
= mask
<< shift
;
2359 /* new connection */
2360 connect
= invert
? 0 : 1;
2362 /* old connection must be powered down */
2363 connect
= invert
? 1 : 0;
2365 mutex_lock(&codec
->mutex
);
2367 change
= snd_soc_test_bits(widget
->codec
, reg
, mask
, val
);
2369 for (wi
= 0; wi
< wlist
->num_widgets
; wi
++) {
2370 widget
= wlist
->widgets
[wi
];
2372 widget
->value
= val
;
2374 update
.kcontrol
= kcontrol
;
2375 update
.widget
= widget
;
2379 widget
->dapm
->update
= &update
;
2381 snd_soc_dapm_mixer_update_power(widget
, kcontrol
, connect
);
2383 widget
->dapm
->update
= NULL
;
2387 mutex_unlock(&codec
->mutex
);
2390 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw
);
2393 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
2394 * @kcontrol: mixer control
2395 * @ucontrol: control element information
2397 * Callback to get the value of a dapm enumerated double mixer control.
2399 * Returns 0 for success.
2401 int snd_soc_dapm_get_enum_double(struct snd_kcontrol
*kcontrol
,
2402 struct snd_ctl_elem_value
*ucontrol
)
2404 struct snd_soc_dapm_widget_list
*wlist
= snd_kcontrol_chip(kcontrol
);
2405 struct snd_soc_dapm_widget
*widget
= wlist
->widgets
[0];
2406 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
2407 unsigned int val
, bitmask
;
2409 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
2411 val
= snd_soc_read(widget
->codec
, e
->reg
);
2412 ucontrol
->value
.enumerated
.item
[0] = (val
>> e
->shift_l
) & (bitmask
- 1);
2413 if (e
->shift_l
!= e
->shift_r
)
2414 ucontrol
->value
.enumerated
.item
[1] =
2415 (val
>> e
->shift_r
) & (bitmask
- 1);
2419 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double
);
2422 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
2423 * @kcontrol: mixer control
2424 * @ucontrol: control element information
2426 * Callback to set the value of a dapm enumerated double mixer control.
2428 * Returns 0 for success.
2430 int snd_soc_dapm_put_enum_double(struct snd_kcontrol
*kcontrol
,
2431 struct snd_ctl_elem_value
*ucontrol
)
2433 struct snd_soc_dapm_widget_list
*wlist
= snd_kcontrol_chip(kcontrol
);
2434 struct snd_soc_dapm_widget
*widget
= wlist
->widgets
[0];
2435 struct snd_soc_codec
*codec
= widget
->codec
;
2436 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
2437 unsigned int val
, mux
, change
;
2438 unsigned int mask
, bitmask
;
2439 struct snd_soc_dapm_update update
;
2442 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
2444 if (ucontrol
->value
.enumerated
.item
[0] > e
->max
- 1)
2446 mux
= ucontrol
->value
.enumerated
.item
[0];
2447 val
= mux
<< e
->shift_l
;
2448 mask
= (bitmask
- 1) << e
->shift_l
;
2449 if (e
->shift_l
!= e
->shift_r
) {
2450 if (ucontrol
->value
.enumerated
.item
[1] > e
->max
- 1)
2452 val
|= ucontrol
->value
.enumerated
.item
[1] << e
->shift_r
;
2453 mask
|= (bitmask
- 1) << e
->shift_r
;
2456 mutex_lock(&codec
->mutex
);
2458 change
= snd_soc_test_bits(widget
->codec
, e
->reg
, mask
, val
);
2460 for (wi
= 0; wi
< wlist
->num_widgets
; wi
++) {
2461 widget
= wlist
->widgets
[wi
];
2463 widget
->value
= val
;
2465 update
.kcontrol
= kcontrol
;
2466 update
.widget
= widget
;
2467 update
.reg
= e
->reg
;
2470 widget
->dapm
->update
= &update
;
2472 snd_soc_dapm_mux_update_power(widget
, kcontrol
, mux
, e
);
2474 widget
->dapm
->update
= NULL
;
2478 mutex_unlock(&codec
->mutex
);
2481 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double
);
2484 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
2485 * @kcontrol: mixer control
2486 * @ucontrol: control element information
2488 * Returns 0 for success.
2490 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol
*kcontrol
,
2491 struct snd_ctl_elem_value
*ucontrol
)
2493 struct snd_soc_dapm_widget_list
*wlist
= snd_kcontrol_chip(kcontrol
);
2494 struct snd_soc_dapm_widget
*widget
= wlist
->widgets
[0];
2496 ucontrol
->value
.enumerated
.item
[0] = widget
->value
;
2500 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt
);
2503 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
2504 * @kcontrol: mixer control
2505 * @ucontrol: control element information
2507 * Returns 0 for success.
2509 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol
*kcontrol
,
2510 struct snd_ctl_elem_value
*ucontrol
)
2512 struct snd_soc_dapm_widget_list
*wlist
= snd_kcontrol_chip(kcontrol
);
2513 struct snd_soc_dapm_widget
*widget
= wlist
->widgets
[0];
2514 struct snd_soc_codec
*codec
= widget
->codec
;
2515 struct soc_enum
*e
=
2516 (struct soc_enum
*)kcontrol
->private_value
;
2521 if (ucontrol
->value
.enumerated
.item
[0] >= e
->max
)
2524 mutex_lock(&codec
->mutex
);
2526 change
= widget
->value
!= ucontrol
->value
.enumerated
.item
[0];
2528 for (wi
= 0; wi
< wlist
->num_widgets
; wi
++) {
2529 widget
= wlist
->widgets
[wi
];
2531 widget
->value
= ucontrol
->value
.enumerated
.item
[0];
2533 snd_soc_dapm_mux_update_power(widget
, kcontrol
, widget
->value
, e
);
2537 mutex_unlock(&codec
->mutex
);
2540 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt
);
2543 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
2545 * @kcontrol: mixer control
2546 * @ucontrol: control element information
2548 * Callback to get the value of a dapm semi enumerated double mixer control.
2550 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2551 * used for handling bitfield coded enumeration for example.
2553 * Returns 0 for success.
2555 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol
*kcontrol
,
2556 struct snd_ctl_elem_value
*ucontrol
)
2558 struct snd_soc_dapm_widget_list
*wlist
= snd_kcontrol_chip(kcontrol
);
2559 struct snd_soc_dapm_widget
*widget
= wlist
->widgets
[0];
2560 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
2561 unsigned int reg_val
, val
, mux
;
2563 reg_val
= snd_soc_read(widget
->codec
, e
->reg
);
2564 val
= (reg_val
>> e
->shift_l
) & e
->mask
;
2565 for (mux
= 0; mux
< e
->max
; mux
++) {
2566 if (val
== e
->values
[mux
])
2569 ucontrol
->value
.enumerated
.item
[0] = mux
;
2570 if (e
->shift_l
!= e
->shift_r
) {
2571 val
= (reg_val
>> e
->shift_r
) & e
->mask
;
2572 for (mux
= 0; mux
< e
->max
; mux
++) {
2573 if (val
== e
->values
[mux
])
2576 ucontrol
->value
.enumerated
.item
[1] = mux
;
2581 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double
);
2584 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
2586 * @kcontrol: mixer control
2587 * @ucontrol: control element information
2589 * Callback to set the value of a dapm semi enumerated double mixer control.
2591 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2592 * used for handling bitfield coded enumeration for example.
2594 * Returns 0 for success.
2596 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol
*kcontrol
,
2597 struct snd_ctl_elem_value
*ucontrol
)
2599 struct snd_soc_dapm_widget_list
*wlist
= snd_kcontrol_chip(kcontrol
);
2600 struct snd_soc_dapm_widget
*widget
= wlist
->widgets
[0];
2601 struct snd_soc_codec
*codec
= widget
->codec
;
2602 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
2603 unsigned int val
, mux
, change
;
2605 struct snd_soc_dapm_update update
;
2608 if (ucontrol
->value
.enumerated
.item
[0] > e
->max
- 1)
2610 mux
= ucontrol
->value
.enumerated
.item
[0];
2611 val
= e
->values
[ucontrol
->value
.enumerated
.item
[0]] << e
->shift_l
;
2612 mask
= e
->mask
<< e
->shift_l
;
2613 if (e
->shift_l
!= e
->shift_r
) {
2614 if (ucontrol
->value
.enumerated
.item
[1] > e
->max
- 1)
2616 val
|= e
->values
[ucontrol
->value
.enumerated
.item
[1]] << e
->shift_r
;
2617 mask
|= e
->mask
<< e
->shift_r
;
2620 mutex_lock(&codec
->mutex
);
2622 change
= snd_soc_test_bits(widget
->codec
, e
->reg
, mask
, val
);
2624 for (wi
= 0; wi
< wlist
->num_widgets
; wi
++) {
2625 widget
= wlist
->widgets
[wi
];
2627 widget
->value
= val
;
2629 update
.kcontrol
= kcontrol
;
2630 update
.widget
= widget
;
2631 update
.reg
= e
->reg
;
2634 widget
->dapm
->update
= &update
;
2636 snd_soc_dapm_mux_update_power(widget
, kcontrol
, mux
, e
);
2638 widget
->dapm
->update
= NULL
;
2642 mutex_unlock(&codec
->mutex
);
2645 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double
);
2648 * snd_soc_dapm_info_pin_switch - Info for a pin switch
2650 * @kcontrol: mixer control
2651 * @uinfo: control element information
2653 * Callback to provide information about a pin switch control.
2655 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol
*kcontrol
,
2656 struct snd_ctl_elem_info
*uinfo
)
2658 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_BOOLEAN
;
2660 uinfo
->value
.integer
.min
= 0;
2661 uinfo
->value
.integer
.max
= 1;
2665 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch
);
2668 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
2670 * @kcontrol: mixer control
2673 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol
*kcontrol
,
2674 struct snd_ctl_elem_value
*ucontrol
)
2676 struct snd_soc_card
*card
= snd_kcontrol_chip(kcontrol
);
2677 const char *pin
= (const char *)kcontrol
->private_value
;
2679 mutex_lock(&card
->mutex
);
2681 ucontrol
->value
.integer
.value
[0] =
2682 snd_soc_dapm_get_pin_status(&card
->dapm
, pin
);
2684 mutex_unlock(&card
->mutex
);
2688 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch
);
2691 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
2693 * @kcontrol: mixer control
2696 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol
*kcontrol
,
2697 struct snd_ctl_elem_value
*ucontrol
)
2699 struct snd_soc_card
*card
= snd_kcontrol_chip(kcontrol
);
2700 const char *pin
= (const char *)kcontrol
->private_value
;
2702 mutex_lock(&card
->mutex
);
2704 if (ucontrol
->value
.integer
.value
[0])
2705 snd_soc_dapm_enable_pin(&card
->dapm
, pin
);
2707 snd_soc_dapm_disable_pin(&card
->dapm
, pin
);
2709 snd_soc_dapm_sync(&card
->dapm
);
2711 mutex_unlock(&card
->mutex
);
2715 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch
);
2717 static struct snd_soc_dapm_widget
*
2718 snd_soc_dapm_new_control(struct snd_soc_dapm_context
*dapm
,
2719 const struct snd_soc_dapm_widget
*widget
)
2721 struct snd_soc_dapm_widget
*w
;
2725 if ((w
= dapm_cnew_widget(widget
)) == NULL
)
2729 case snd_soc_dapm_regulator_supply
:
2730 w
->priv
= devm_regulator_get(dapm
->dev
, w
->name
);
2731 if (IS_ERR(w
->priv
)) {
2732 ret
= PTR_ERR(w
->priv
);
2733 dev_err(dapm
->dev
, "Failed to request %s: %d\n",
2742 name_len
= strlen(widget
->name
) + 1;
2743 if (dapm
->codec
&& dapm
->codec
->name_prefix
)
2744 name_len
+= 1 + strlen(dapm
->codec
->name_prefix
);
2745 w
->name
= kmalloc(name_len
, GFP_KERNEL
);
2746 if (w
->name
== NULL
) {
2750 if (dapm
->codec
&& dapm
->codec
->name_prefix
)
2751 snprintf((char *)w
->name
, name_len
, "%s %s",
2752 dapm
->codec
->name_prefix
, widget
->name
);
2754 snprintf((char *)w
->name
, name_len
, "%s", widget
->name
);
2757 case snd_soc_dapm_switch
:
2758 case snd_soc_dapm_mixer
:
2759 case snd_soc_dapm_mixer_named_ctl
:
2760 w
->power_check
= dapm_generic_check_power
;
2762 case snd_soc_dapm_mux
:
2763 case snd_soc_dapm_virt_mux
:
2764 case snd_soc_dapm_value_mux
:
2765 w
->power_check
= dapm_generic_check_power
;
2767 case snd_soc_dapm_adc
:
2768 case snd_soc_dapm_aif_out
:
2769 w
->power_check
= dapm_adc_check_power
;
2771 case snd_soc_dapm_dac
:
2772 case snd_soc_dapm_aif_in
:
2773 w
->power_check
= dapm_dac_check_power
;
2775 case snd_soc_dapm_pga
:
2776 case snd_soc_dapm_out_drv
:
2777 case snd_soc_dapm_input
:
2778 case snd_soc_dapm_output
:
2779 case snd_soc_dapm_micbias
:
2780 case snd_soc_dapm_spk
:
2781 case snd_soc_dapm_hp
:
2782 case snd_soc_dapm_mic
:
2783 case snd_soc_dapm_line
:
2784 w
->power_check
= dapm_generic_check_power
;
2786 case snd_soc_dapm_supply
:
2787 case snd_soc_dapm_regulator_supply
:
2788 w
->power_check
= dapm_supply_check_power
;
2790 case snd_soc_dapm_dai
:
2791 w
->power_check
= dapm_dai_check_power
;
2794 w
->power_check
= dapm_always_on_check_power
;
2800 w
->codec
= dapm
->codec
;
2801 w
->platform
= dapm
->platform
;
2802 INIT_LIST_HEAD(&w
->sources
);
2803 INIT_LIST_HEAD(&w
->sinks
);
2804 INIT_LIST_HEAD(&w
->list
);
2805 INIT_LIST_HEAD(&w
->dirty
);
2806 list_add(&w
->list
, &dapm
->card
->widgets
);
2808 /* machine layer set ups unconnected pins and insertions */
2814 * snd_soc_dapm_new_controls - create new dapm controls
2815 * @dapm: DAPM context
2816 * @widget: widget array
2817 * @num: number of widgets
2819 * Creates new DAPM controls based upon the templates.
2821 * Returns 0 for success else error.
2823 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context
*dapm
,
2824 const struct snd_soc_dapm_widget
*widget
,
2827 struct snd_soc_dapm_widget
*w
;
2830 for (i
= 0; i
< num
; i
++) {
2831 w
= snd_soc_dapm_new_control(dapm
, widget
);
2834 "ASoC: Failed to create DAPM control %s\n",
2842 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls
);
2844 int snd_soc_dapm_new_dai_widgets(struct snd_soc_dapm_context
*dapm
,
2845 struct snd_soc_dai
*dai
)
2847 struct snd_soc_dapm_widget
template;
2848 struct snd_soc_dapm_widget
*w
;
2850 WARN_ON(dapm
->dev
!= dai
->dev
);
2852 memset(&template, 0, sizeof(template));
2853 template.reg
= SND_SOC_NOPM
;
2855 if (dai
->driver
->playback
.stream_name
) {
2856 template.id
= snd_soc_dapm_dai
;
2857 template.name
= dai
->driver
->playback
.stream_name
;
2858 template.sname
= dai
->driver
->playback
.stream_name
;
2860 dev_dbg(dai
->dev
, "adding %s widget\n",
2863 w
= snd_soc_dapm_new_control(dapm
, &template);
2865 dev_err(dapm
->dev
, "Failed to create %s widget\n",
2866 dai
->driver
->playback
.stream_name
);
2870 dai
->playback_widget
= w
;
2873 if (dai
->driver
->capture
.stream_name
) {
2874 template.id
= snd_soc_dapm_dai
;
2875 template.name
= dai
->driver
->capture
.stream_name
;
2876 template.sname
= dai
->driver
->capture
.stream_name
;
2878 dev_dbg(dai
->dev
, "adding %s widget\n",
2881 w
= snd_soc_dapm_new_control(dapm
, &template);
2883 dev_err(dapm
->dev
, "Failed to create %s widget\n",
2884 dai
->driver
->capture
.stream_name
);
2888 dai
->capture_widget
= w
;
2894 int snd_soc_dapm_link_dai_widgets(struct snd_soc_card
*card
)
2896 struct snd_soc_dapm_widget
*dai_w
, *w
;
2897 struct snd_soc_dai
*dai
;
2898 struct snd_soc_dapm_route r
;
2900 memset(&r
, 0, sizeof(r
));
2902 /* For each DAI widget... */
2903 list_for_each_entry(dai_w
, &card
->widgets
, list
) {
2904 if (dai_w
->id
!= snd_soc_dapm_dai
)
2909 /* ...find all widgets with the same stream and link them */
2910 list_for_each_entry(w
, &card
->widgets
, list
) {
2911 if (w
->dapm
!= dai_w
->dapm
)
2914 if (w
->id
== snd_soc_dapm_dai
)
2920 if (dai
->driver
->playback
.stream_name
&&
2922 dai
->driver
->playback
.stream_name
)) {
2923 r
.source
= dai
->playback_widget
->name
;
2925 dev_dbg(dai
->dev
, "%s -> %s\n",
2928 snd_soc_dapm_add_route(w
->dapm
, &r
);
2931 if (dai
->driver
->capture
.stream_name
&&
2933 dai
->driver
->capture
.stream_name
)) {
2935 r
.sink
= dai
->capture_widget
->name
;
2936 dev_dbg(dai
->dev
, "%s -> %s\n",
2939 snd_soc_dapm_add_route(w
->dapm
, &r
);
2947 static void soc_dapm_stream_event(struct snd_soc_dapm_context
*dapm
,
2948 int stream
, struct snd_soc_dai
*dai
,
2951 struct snd_soc_dapm_widget
*w
;
2953 if (stream
== SNDRV_PCM_STREAM_PLAYBACK
)
2954 w
= dai
->playback_widget
;
2956 w
= dai
->capture_widget
;
2961 dapm_mark_dirty(w
, "stream event");
2964 case SND_SOC_DAPM_STREAM_START
:
2967 case SND_SOC_DAPM_STREAM_STOP
:
2970 case SND_SOC_DAPM_STREAM_SUSPEND
:
2971 case SND_SOC_DAPM_STREAM_RESUME
:
2972 case SND_SOC_DAPM_STREAM_PAUSE_PUSH
:
2973 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE
:
2977 dapm_power_widgets(dapm
, event
);
2981 * snd_soc_dapm_stream_event - send a stream event to the dapm core
2982 * @rtd: PCM runtime data
2983 * @stream: stream name
2984 * @event: stream event
2986 * Sends a stream event to the dapm core. The core then makes any
2987 * necessary widget power changes.
2989 * Returns 0 for success else error.
2991 int snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime
*rtd
, int stream
,
2992 struct snd_soc_dai
*dai
, int event
)
2994 struct snd_soc_codec
*codec
= rtd
->codec
;
2996 mutex_lock(&codec
->mutex
);
2997 soc_dapm_stream_event(&codec
->dapm
, stream
, dai
, event
);
2998 mutex_unlock(&codec
->mutex
);
3003 * snd_soc_dapm_enable_pin - enable pin.
3004 * @dapm: DAPM context
3007 * Enables input/output pin and its parents or children widgets iff there is
3008 * a valid audio route and active audio stream.
3009 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3010 * do any widget power switching.
3012 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context
*dapm
, const char *pin
)
3014 return snd_soc_dapm_set_pin(dapm
, pin
, 1);
3016 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin
);
3019 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
3020 * @dapm: DAPM context
3023 * Enables input/output pin regardless of any other state. This is
3024 * intended for use with microphone bias supplies used in microphone
3027 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3028 * do any widget power switching.
3030 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context
*dapm
,
3033 struct snd_soc_dapm_widget
*w
= dapm_find_widget(dapm
, pin
, true);
3036 dev_err(dapm
->dev
, "dapm: unknown pin %s\n", pin
);
3040 dev_dbg(w
->dapm
->dev
, "dapm: force enable pin %s\n", pin
);
3043 dapm_mark_dirty(w
, "force enable");
3047 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin
);
3050 * snd_soc_dapm_disable_pin - disable pin.
3051 * @dapm: DAPM context
3054 * Disables input/output pin and its parents or children widgets.
3055 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3056 * do any widget power switching.
3058 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context
*dapm
,
3061 return snd_soc_dapm_set_pin(dapm
, pin
, 0);
3063 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin
);
3066 * snd_soc_dapm_nc_pin - permanently disable pin.
3067 * @dapm: DAPM context
3070 * Marks the specified pin as being not connected, disabling it along
3071 * any parent or child widgets. At present this is identical to
3072 * snd_soc_dapm_disable_pin() but in future it will be extended to do
3073 * additional things such as disabling controls which only affect
3074 * paths through the pin.
3076 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3077 * do any widget power switching.
3079 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context
*dapm
, const char *pin
)
3081 return snd_soc_dapm_set_pin(dapm
, pin
, 0);
3083 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin
);
3086 * snd_soc_dapm_get_pin_status - get audio pin status
3087 * @dapm: DAPM context
3088 * @pin: audio signal pin endpoint (or start point)
3090 * Get audio pin status - connected or disconnected.
3092 * Returns 1 for connected otherwise 0.
3094 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context
*dapm
,
3097 struct snd_soc_dapm_widget
*w
= dapm_find_widget(dapm
, pin
, true);
3100 return w
->connected
;
3104 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status
);
3107 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
3108 * @dapm: DAPM context
3109 * @pin: audio signal pin endpoint (or start point)
3111 * Mark the given endpoint or pin as ignoring suspend. When the
3112 * system is disabled a path between two endpoints flagged as ignoring
3113 * suspend will not be disabled. The path must already be enabled via
3114 * normal means at suspend time, it will not be turned on if it was not
3117 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context
*dapm
,
3120 struct snd_soc_dapm_widget
*w
= dapm_find_widget(dapm
, pin
, false);
3123 dev_err(dapm
->dev
, "dapm: unknown pin %s\n", pin
);
3127 w
->ignore_suspend
= 1;
3131 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend
);
3133 static bool snd_soc_dapm_widget_in_card_paths(struct snd_soc_card
*card
,
3134 struct snd_soc_dapm_widget
*w
)
3136 struct snd_soc_dapm_path
*p
;
3138 list_for_each_entry(p
, &card
->paths
, list
) {
3139 if ((p
->source
== w
) || (p
->sink
== w
)) {
3141 "... Path %s(id:%d dapm:%p) - %s(id:%d dapm:%p)\n",
3142 p
->source
->name
, p
->source
->id
, p
->source
->dapm
,
3143 p
->sink
->name
, p
->sink
->id
, p
->sink
->dapm
);
3145 /* Connected to something other than the codec */
3146 if (p
->source
->dapm
!= p
->sink
->dapm
)
3149 * Loopback connection from codec external pin to
3150 * codec external pin
3152 if (p
->sink
->id
== snd_soc_dapm_input
) {
3153 switch (p
->source
->id
) {
3154 case snd_soc_dapm_output
:
3155 case snd_soc_dapm_micbias
:
3168 * snd_soc_dapm_auto_nc_codec_pins - call snd_soc_dapm_nc_pin for unused pins
3169 * @codec: The codec whose pins should be processed
3171 * Automatically call snd_soc_dapm_nc_pin() for any external pins in the codec
3172 * which are unused. Pins are used if they are connected externally to the
3173 * codec, whether that be to some other device, or a loop-back connection to
3176 void snd_soc_dapm_auto_nc_codec_pins(struct snd_soc_codec
*codec
)
3178 struct snd_soc_card
*card
= codec
->card
;
3179 struct snd_soc_dapm_context
*dapm
= &codec
->dapm
;
3180 struct snd_soc_dapm_widget
*w
;
3182 dev_dbg(codec
->dev
, "Auto NC: DAPMs: card:%p codec:%p\n",
3183 &card
->dapm
, &codec
->dapm
);
3185 list_for_each_entry(w
, &card
->widgets
, list
) {
3186 if (w
->dapm
!= dapm
)
3189 case snd_soc_dapm_input
:
3190 case snd_soc_dapm_output
:
3191 case snd_soc_dapm_micbias
:
3192 dev_dbg(codec
->dev
, "Auto NC: Checking widget %s\n",
3194 if (!snd_soc_dapm_widget_in_card_paths(card
, w
)) {
3196 "... Not in map; disabling\n");
3197 snd_soc_dapm_nc_pin(dapm
, w
->name
);
3207 * snd_soc_dapm_free - free dapm resources
3208 * @dapm: DAPM context
3210 * Free all dapm widgets and resources.
3212 void snd_soc_dapm_free(struct snd_soc_dapm_context
*dapm
)
3214 snd_soc_dapm_sys_remove(dapm
->dev
);
3215 dapm_debugfs_cleanup(dapm
);
3216 dapm_free_widgets(dapm
);
3217 list_del(&dapm
->list
);
3219 EXPORT_SYMBOL_GPL(snd_soc_dapm_free
);
3221 static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context
*dapm
)
3223 struct snd_soc_dapm_widget
*w
;
3224 LIST_HEAD(down_list
);
3227 list_for_each_entry(w
, &dapm
->card
->widgets
, list
) {
3228 if (w
->dapm
!= dapm
)
3231 dapm_seq_insert(w
, &down_list
, false);
3237 /* If there were no widgets to power down we're already in
3241 if (dapm
->bias_level
== SND_SOC_BIAS_ON
)
3242 snd_soc_dapm_set_bias_level(dapm
,
3243 SND_SOC_BIAS_PREPARE
);
3244 dapm_seq_run(dapm
, &down_list
, 0, false);
3245 if (dapm
->bias_level
== SND_SOC_BIAS_PREPARE
)
3246 snd_soc_dapm_set_bias_level(dapm
,
3247 SND_SOC_BIAS_STANDBY
);
3252 * snd_soc_dapm_shutdown - callback for system shutdown
3254 void snd_soc_dapm_shutdown(struct snd_soc_card
*card
)
3256 struct snd_soc_codec
*codec
;
3258 list_for_each_entry(codec
, &card
->codec_dev_list
, list
) {
3259 soc_dapm_shutdown_codec(&codec
->dapm
);
3260 if (codec
->dapm
.bias_level
== SND_SOC_BIAS_STANDBY
)
3261 snd_soc_dapm_set_bias_level(&codec
->dapm
,
3266 /* Module information */
3267 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3268 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
3269 MODULE_LICENSE("GPL");