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/async.h>
36 #include <linux/delay.h>
38 #include <linux/bitops.h>
39 #include <linux/platform_device.h>
40 #include <linux/jiffies.h>
41 #include <linux/debugfs.h>
42 #include <linux/pm_runtime.h>
43 #include <linux/slab.h>
44 #include <sound/core.h>
45 #include <sound/pcm.h>
46 #include <sound/pcm_params.h>
47 #include <sound/soc.h>
48 #include <sound/initval.h>
50 #include <trace/events/asoc.h>
52 #define DAPM_UPDATE_STAT(widget, val) widget->dapm->card->dapm_stats.val++;
54 /* dapm power sequences - make this per codec in the future */
55 static int dapm_up_seq
[] = {
56 [snd_soc_dapm_pre
] = 0,
57 [snd_soc_dapm_supply
] = 1,
58 [snd_soc_dapm_micbias
] = 2,
59 [snd_soc_dapm_aif_in
] = 3,
60 [snd_soc_dapm_aif_out
] = 3,
61 [snd_soc_dapm_mic
] = 4,
62 [snd_soc_dapm_mux
] = 5,
63 [snd_soc_dapm_virt_mux
] = 5,
64 [snd_soc_dapm_value_mux
] = 5,
65 [snd_soc_dapm_dac
] = 6,
66 [snd_soc_dapm_mixer
] = 7,
67 [snd_soc_dapm_mixer_named_ctl
] = 7,
68 [snd_soc_dapm_pga
] = 8,
69 [snd_soc_dapm_adc
] = 9,
70 [snd_soc_dapm_out_drv
] = 10,
71 [snd_soc_dapm_hp
] = 10,
72 [snd_soc_dapm_spk
] = 10,
73 [snd_soc_dapm_post
] = 11,
76 static int dapm_down_seq
[] = {
77 [snd_soc_dapm_pre
] = 0,
78 [snd_soc_dapm_adc
] = 1,
79 [snd_soc_dapm_hp
] = 2,
80 [snd_soc_dapm_spk
] = 2,
81 [snd_soc_dapm_out_drv
] = 2,
82 [snd_soc_dapm_pga
] = 4,
83 [snd_soc_dapm_mixer_named_ctl
] = 5,
84 [snd_soc_dapm_mixer
] = 5,
85 [snd_soc_dapm_dac
] = 6,
86 [snd_soc_dapm_mic
] = 7,
87 [snd_soc_dapm_micbias
] = 8,
88 [snd_soc_dapm_mux
] = 9,
89 [snd_soc_dapm_virt_mux
] = 9,
90 [snd_soc_dapm_value_mux
] = 9,
91 [snd_soc_dapm_aif_in
] = 10,
92 [snd_soc_dapm_aif_out
] = 10,
93 [snd_soc_dapm_supply
] = 11,
94 [snd_soc_dapm_post
] = 12,
97 static void pop_wait(u32 pop_time
)
100 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time
));
103 static void pop_dbg(struct device
*dev
, u32 pop_time
, const char *fmt
, ...)
111 buf
= kmalloc(PAGE_SIZE
, GFP_KERNEL
);
116 vsnprintf(buf
, PAGE_SIZE
, fmt
, args
);
117 dev_info(dev
, "%s", buf
);
123 static bool dapm_dirty_widget(struct snd_soc_dapm_widget
*w
)
125 return !list_empty(&w
->dirty
);
128 void dapm_mark_dirty(struct snd_soc_dapm_widget
*w
, const char *reason
)
130 if (!dapm_dirty_widget(w
)) {
131 dev_vdbg(w
->dapm
->dev
, "Marking %s dirty due to %s\n",
133 list_add_tail(&w
->dirty
, &w
->dapm
->card
->dapm_dirty
);
136 EXPORT_SYMBOL_GPL(dapm_mark_dirty
);
138 /* create a new dapm widget */
139 static inline struct snd_soc_dapm_widget
*dapm_cnew_widget(
140 const struct snd_soc_dapm_widget
*_widget
)
142 return kmemdup(_widget
, sizeof(*_widget
), GFP_KERNEL
);
145 /* get snd_card from DAPM context */
146 static inline struct snd_card
*dapm_get_snd_card(
147 struct snd_soc_dapm_context
*dapm
)
150 return dapm
->codec
->card
->snd_card
;
151 else if (dapm
->platform
)
152 return dapm
->platform
->card
->snd_card
;
160 /* get soc_card from DAPM context */
161 static inline struct snd_soc_card
*dapm_get_soc_card(
162 struct snd_soc_dapm_context
*dapm
)
165 return dapm
->codec
->card
;
166 else if (dapm
->platform
)
167 return dapm
->platform
->card
;
175 static int soc_widget_read(struct snd_soc_dapm_widget
*w
, int reg
)
178 return snd_soc_read(w
->codec
, reg
);
179 else if (w
->platform
)
180 return snd_soc_platform_read(w
->platform
, reg
);
182 dev_err(w
->dapm
->dev
, "no valid widget read method\n");
186 static int soc_widget_write(struct snd_soc_dapm_widget
*w
, int reg
, int val
)
189 return snd_soc_write(w
->codec
, reg
, val
);
190 else if (w
->platform
)
191 return snd_soc_platform_write(w
->platform
, reg
, val
);
193 dev_err(w
->dapm
->dev
, "no valid widget write method\n");
197 static int soc_widget_update_bits(struct snd_soc_dapm_widget
*w
,
198 unsigned short reg
, unsigned int mask
, unsigned int value
)
201 unsigned int old
, new;
204 ret
= soc_widget_read(w
, reg
);
209 new = (old
& ~mask
) | (value
& mask
);
212 ret
= soc_widget_write(w
, reg
, new);
221 * snd_soc_dapm_set_bias_level - set the bias level for the system
222 * @dapm: DAPM context
223 * @level: level to configure
225 * Configure the bias (power) levels for the SoC audio device.
227 * Returns 0 for success else error.
229 static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context
*dapm
,
230 enum snd_soc_bias_level level
)
232 struct snd_soc_card
*card
= dapm
->card
;
235 trace_snd_soc_bias_level_start(card
, level
);
237 if (card
&& card
->set_bias_level
)
238 ret
= card
->set_bias_level(card
, dapm
, level
);
243 if (dapm
->codec
->driver
->set_bias_level
)
244 ret
= dapm
->codec
->driver
->set_bias_level(dapm
->codec
,
247 dapm
->bias_level
= level
;
252 if (card
&& card
->set_bias_level_post
)
253 ret
= card
->set_bias_level_post(card
, dapm
, level
);
255 trace_snd_soc_bias_level_done(card
, level
);
260 /* set up initial codec paths */
261 static void dapm_set_path_status(struct snd_soc_dapm_widget
*w
,
262 struct snd_soc_dapm_path
*p
, int i
)
265 case snd_soc_dapm_switch
:
266 case snd_soc_dapm_mixer
:
267 case snd_soc_dapm_mixer_named_ctl
: {
269 struct soc_mixer_control
*mc
= (struct soc_mixer_control
*)
270 w
->kcontrol_news
[i
].private_value
;
271 unsigned int reg
= mc
->reg
;
272 unsigned int shift
= mc
->shift
;
274 unsigned int mask
= (1 << fls(max
)) - 1;
275 unsigned int invert
= mc
->invert
;
277 val
= soc_widget_read(w
, reg
);
278 val
= (val
>> shift
) & mask
;
280 if ((invert
&& !val
) || (!invert
&& val
))
286 case snd_soc_dapm_mux
: {
287 struct soc_enum
*e
= (struct soc_enum
*)
288 w
->kcontrol_news
[i
].private_value
;
289 int val
, item
, bitmask
;
291 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
293 val
= soc_widget_read(w
, e
->reg
);
294 item
= (val
>> e
->shift_l
) & (bitmask
- 1);
297 for (i
= 0; i
< e
->max
; i
++) {
298 if (!(strcmp(p
->name
, e
->texts
[i
])) && item
== i
)
303 case snd_soc_dapm_virt_mux
: {
304 struct soc_enum
*e
= (struct soc_enum
*)
305 w
->kcontrol_news
[i
].private_value
;
308 /* since a virtual mux has no backing registers to
309 * decide which path to connect, it will try to match
310 * with the first enumeration. This is to ensure
311 * that the default mux choice (the first) will be
312 * correctly powered up during initialization.
314 if (!strcmp(p
->name
, e
->texts
[0]))
318 case snd_soc_dapm_value_mux
: {
319 struct soc_enum
*e
= (struct soc_enum
*)
320 w
->kcontrol_news
[i
].private_value
;
323 val
= soc_widget_read(w
, e
->reg
);
324 val
= (val
>> e
->shift_l
) & e
->mask
;
325 for (item
= 0; item
< e
->max
; item
++) {
326 if (val
== e
->values
[item
])
331 for (i
= 0; i
< e
->max
; i
++) {
332 if (!(strcmp(p
->name
, e
->texts
[i
])) && item
== i
)
337 /* does not affect routing - always connected */
338 case snd_soc_dapm_pga
:
339 case snd_soc_dapm_out_drv
:
340 case snd_soc_dapm_output
:
341 case snd_soc_dapm_adc
:
342 case snd_soc_dapm_input
:
343 case snd_soc_dapm_siggen
:
344 case snd_soc_dapm_dac
:
345 case snd_soc_dapm_micbias
:
346 case snd_soc_dapm_vmid
:
347 case snd_soc_dapm_supply
:
348 case snd_soc_dapm_aif_in
:
349 case snd_soc_dapm_aif_out
:
350 case snd_soc_dapm_hp
:
351 case snd_soc_dapm_mic
:
352 case snd_soc_dapm_spk
:
353 case snd_soc_dapm_line
:
356 /* does affect routing - dynamically connected */
357 case snd_soc_dapm_pre
:
358 case snd_soc_dapm_post
:
364 /* connect mux widget to its interconnecting audio paths */
365 static int dapm_connect_mux(struct snd_soc_dapm_context
*dapm
,
366 struct snd_soc_dapm_widget
*src
, struct snd_soc_dapm_widget
*dest
,
367 struct snd_soc_dapm_path
*path
, const char *control_name
,
368 const struct snd_kcontrol_new
*kcontrol
)
370 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
373 for (i
= 0; i
< e
->max
; i
++) {
374 if (!(strcmp(control_name
, e
->texts
[i
]))) {
375 list_add(&path
->list
, &dapm
->card
->paths
);
376 list_add(&path
->list_sink
, &dest
->sources
);
377 list_add(&path
->list_source
, &src
->sinks
);
378 path
->name
= (char*)e
->texts
[i
];
379 dapm_set_path_status(dest
, path
, 0);
387 /* connect mixer widget to its interconnecting audio paths */
388 static int dapm_connect_mixer(struct snd_soc_dapm_context
*dapm
,
389 struct snd_soc_dapm_widget
*src
, struct snd_soc_dapm_widget
*dest
,
390 struct snd_soc_dapm_path
*path
, const char *control_name
)
394 /* search for mixer kcontrol */
395 for (i
= 0; i
< dest
->num_kcontrols
; i
++) {
396 if (!strcmp(control_name
, dest
->kcontrol_news
[i
].name
)) {
397 list_add(&path
->list
, &dapm
->card
->paths
);
398 list_add(&path
->list_sink
, &dest
->sources
);
399 list_add(&path
->list_source
, &src
->sinks
);
400 path
->name
= dest
->kcontrol_news
[i
].name
;
401 dapm_set_path_status(dest
, path
, i
);
408 static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context
*dapm
,
409 struct snd_soc_dapm_widget
*kcontrolw
,
410 const struct snd_kcontrol_new
*kcontrol_new
,
411 struct snd_kcontrol
**kcontrol
)
413 struct snd_soc_dapm_widget
*w
;
418 list_for_each_entry(w
, &dapm
->card
->widgets
, list
) {
419 if (w
== kcontrolw
|| w
->dapm
!= kcontrolw
->dapm
)
421 for (i
= 0; i
< w
->num_kcontrols
; i
++) {
422 if (&w
->kcontrol_news
[i
] == kcontrol_new
) {
424 *kcontrol
= w
->kcontrols
[i
];
433 /* create new dapm mixer control */
434 static int dapm_new_mixer(struct snd_soc_dapm_widget
*w
)
436 struct snd_soc_dapm_context
*dapm
= w
->dapm
;
438 size_t name_len
, prefix_len
;
439 struct snd_soc_dapm_path
*path
;
440 struct snd_card
*card
= dapm
->card
->snd_card
;
442 struct snd_soc_dapm_widget_list
*wlist
;
446 prefix
= dapm
->codec
->name_prefix
;
451 prefix_len
= strlen(prefix
) + 1;
456 for (i
= 0; i
< w
->num_kcontrols
; i
++) {
459 list_for_each_entry(path
, &w
->sources
, list_sink
) {
461 /* mixer/mux paths name must match control name */
462 if (path
->name
!= (char *)w
->kcontrol_news
[i
].name
)
465 if (w
->kcontrols
[i
]) {
466 path
->kcontrol
= w
->kcontrols
[i
];
470 wlistsize
= sizeof(struct snd_soc_dapm_widget_list
) +
471 sizeof(struct snd_soc_dapm_widget
*),
472 wlist
= kzalloc(wlistsize
, GFP_KERNEL
);
475 "asoc: can't allocate widget list for %s\n",
479 wlist
->num_widgets
= 1;
480 wlist
->widgets
[0] = w
;
482 /* add dapm control with long name.
483 * for dapm_mixer this is the concatenation of the
484 * mixer and kcontrol name.
485 * for dapm_mixer_named_ctl this is simply the
488 name_len
= strlen(w
->kcontrol_news
[i
].name
) + 1;
489 if (w
->id
!= snd_soc_dapm_mixer_named_ctl
)
490 name_len
+= 1 + strlen(w
->name
);
492 path
->long_name
= kmalloc(name_len
, GFP_KERNEL
);
494 if (path
->long_name
== NULL
) {
501 /* The control will get a prefix from
502 * the control creation process but
503 * we're also using the same prefix
504 * for widgets so cut the prefix off
505 * the front of the widget name.
507 snprintf(path
->long_name
, name_len
, "%s %s",
508 w
->name
+ prefix_len
,
509 w
->kcontrol_news
[i
].name
);
511 case snd_soc_dapm_mixer_named_ctl
:
512 snprintf(path
->long_name
, name_len
, "%s",
513 w
->kcontrol_news
[i
].name
);
517 path
->long_name
[name_len
- 1] = '\0';
519 path
->kcontrol
= snd_soc_cnew(&w
->kcontrol_news
[i
],
520 wlist
, path
->long_name
,
522 ret
= snd_ctl_add(card
, path
->kcontrol
);
525 "asoc: failed to add dapm kcontrol %s: %d\n",
526 path
->long_name
, ret
);
528 kfree(path
->long_name
);
529 path
->long_name
= NULL
;
532 w
->kcontrols
[i
] = path
->kcontrol
;
538 /* create new dapm mux control */
539 static int dapm_new_mux(struct snd_soc_dapm_widget
*w
)
541 struct snd_soc_dapm_context
*dapm
= w
->dapm
;
542 struct snd_soc_dapm_path
*path
= NULL
;
543 struct snd_kcontrol
*kcontrol
;
544 struct snd_card
*card
= dapm
->card
->snd_card
;
548 struct snd_soc_dapm_widget_list
*wlist
;
549 int shared
, wlistentries
;
553 if (w
->num_kcontrols
!= 1) {
555 "asoc: mux %s has incorrect number of controls\n",
560 shared
= dapm_is_shared_kcontrol(dapm
, w
, &w
->kcontrol_news
[0],
563 wlist
= kcontrol
->private_data
;
564 wlistentries
= wlist
->num_widgets
+ 1;
569 wlistsize
= sizeof(struct snd_soc_dapm_widget_list
) +
570 wlistentries
* sizeof(struct snd_soc_dapm_widget
*),
571 wlist
= krealloc(wlist
, wlistsize
, GFP_KERNEL
);
574 "asoc: can't allocate widget list for %s\n", w
->name
);
577 wlist
->num_widgets
= wlistentries
;
578 wlist
->widgets
[wlistentries
- 1] = w
;
582 prefix
= dapm
->codec
->name_prefix
;
587 name
= w
->kcontrol_news
[0].name
;
592 prefix_len
= strlen(prefix
) + 1;
598 * The control will get a prefix from the control creation
599 * process but we're also using the same prefix for widgets so
600 * cut the prefix off the front of the widget name.
602 kcontrol
= snd_soc_cnew(&w
->kcontrol_news
[0], wlist
,
603 name
+ prefix_len
, prefix
);
604 ret
= snd_ctl_add(card
, kcontrol
);
606 dev_err(dapm
->dev
, "failed to add kcontrol %s: %d\n",
613 kcontrol
->private_data
= wlist
;
615 w
->kcontrols
[0] = kcontrol
;
617 list_for_each_entry(path
, &w
->sources
, list_sink
)
618 path
->kcontrol
= kcontrol
;
623 /* create new dapm volume control */
624 static int dapm_new_pga(struct snd_soc_dapm_widget
*w
)
626 if (w
->num_kcontrols
)
627 dev_err(w
->dapm
->dev
,
628 "asoc: PGA controls not supported: '%s'\n", w
->name
);
633 /* reset 'walked' bit for each dapm path */
634 static inline void dapm_clear_walk(struct snd_soc_dapm_context
*dapm
)
636 struct snd_soc_dapm_path
*p
;
638 list_for_each_entry(p
, &dapm
->card
->paths
, list
)
642 /* We implement power down on suspend by checking the power state of
643 * the ALSA card - when we are suspending the ALSA state for the card
646 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget
*widget
)
648 int level
= snd_power_get_state(widget
->dapm
->card
->snd_card
);
651 case SNDRV_CTL_POWER_D3hot
:
652 case SNDRV_CTL_POWER_D3cold
:
653 if (widget
->ignore_suspend
)
654 dev_dbg(widget
->dapm
->dev
, "%s ignoring suspend\n",
656 return widget
->ignore_suspend
;
663 * Recursively check for a completed path to an active or physically connected
664 * output widget. Returns number of complete paths.
666 static int is_connected_output_ep(struct snd_soc_dapm_widget
*widget
)
668 struct snd_soc_dapm_path
*path
;
671 if (widget
->outputs
>= 0)
672 return widget
->outputs
;
674 DAPM_UPDATE_STAT(widget
, path_checks
);
676 if (widget
->id
== snd_soc_dapm_supply
)
679 switch (widget
->id
) {
680 case snd_soc_dapm_adc
:
681 case snd_soc_dapm_aif_out
:
682 if (widget
->active
) {
683 widget
->outputs
= snd_soc_dapm_suspend_check(widget
);
684 return widget
->outputs
;
690 if (widget
->connected
) {
691 /* connected pin ? */
692 if (widget
->id
== snd_soc_dapm_output
&& !widget
->ext
) {
693 widget
->outputs
= snd_soc_dapm_suspend_check(widget
);
694 return widget
->outputs
;
697 /* connected jack or spk ? */
698 if (widget
->id
== snd_soc_dapm_hp
||
699 widget
->id
== snd_soc_dapm_spk
||
700 (widget
->id
== snd_soc_dapm_line
&&
701 !list_empty(&widget
->sources
))) {
702 widget
->outputs
= snd_soc_dapm_suspend_check(widget
);
703 return widget
->outputs
;
707 list_for_each_entry(path
, &widget
->sinks
, list_source
) {
708 DAPM_UPDATE_STAT(widget
, neighbour_checks
);
716 if (path
->sink
&& path
->connect
) {
718 con
+= is_connected_output_ep(path
->sink
);
722 widget
->outputs
= con
;
728 * Recursively check for a completed path to an active or physically connected
729 * input widget. Returns number of complete paths.
731 static int is_connected_input_ep(struct snd_soc_dapm_widget
*widget
)
733 struct snd_soc_dapm_path
*path
;
736 if (widget
->inputs
>= 0)
737 return widget
->inputs
;
739 DAPM_UPDATE_STAT(widget
, path_checks
);
741 if (widget
->id
== snd_soc_dapm_supply
)
744 /* active stream ? */
745 switch (widget
->id
) {
746 case snd_soc_dapm_dac
:
747 case snd_soc_dapm_aif_in
:
748 if (widget
->active
) {
749 widget
->inputs
= snd_soc_dapm_suspend_check(widget
);
750 return widget
->inputs
;
756 if (widget
->connected
) {
757 /* connected pin ? */
758 if (widget
->id
== snd_soc_dapm_input
&& !widget
->ext
) {
759 widget
->inputs
= snd_soc_dapm_suspend_check(widget
);
760 return widget
->inputs
;
763 /* connected VMID/Bias for lower pops */
764 if (widget
->id
== snd_soc_dapm_vmid
) {
765 widget
->inputs
= snd_soc_dapm_suspend_check(widget
);
766 return widget
->inputs
;
769 /* connected jack ? */
770 if (widget
->id
== snd_soc_dapm_mic
||
771 (widget
->id
== snd_soc_dapm_line
&&
772 !list_empty(&widget
->sinks
))) {
773 widget
->inputs
= snd_soc_dapm_suspend_check(widget
);
774 return widget
->inputs
;
777 /* signal generator */
778 if (widget
->id
== snd_soc_dapm_siggen
) {
779 widget
->inputs
= snd_soc_dapm_suspend_check(widget
);
780 return widget
->inputs
;
784 list_for_each_entry(path
, &widget
->sources
, list_sink
) {
785 DAPM_UPDATE_STAT(widget
, neighbour_checks
);
793 if (path
->source
&& path
->connect
) {
795 con
+= is_connected_input_ep(path
->source
);
799 widget
->inputs
= con
;
805 * Handler for generic register modifier widget.
807 int dapm_reg_event(struct snd_soc_dapm_widget
*w
,
808 struct snd_kcontrol
*kcontrol
, int event
)
812 if (SND_SOC_DAPM_EVENT_ON(event
))
817 soc_widget_update_bits(w
, -(w
->reg
+ 1),
818 w
->mask
<< w
->shift
, val
<< w
->shift
);
822 EXPORT_SYMBOL_GPL(dapm_reg_event
);
824 static int dapm_widget_power_check(struct snd_soc_dapm_widget
*w
)
826 if (w
->power_checked
)
832 w
->new_power
= w
->power_check(w
);
834 w
->power_checked
= true;
839 /* Generic check to see if a widget should be powered.
841 static int dapm_generic_check_power(struct snd_soc_dapm_widget
*w
)
845 DAPM_UPDATE_STAT(w
, power_checks
);
847 in
= is_connected_input_ep(w
);
848 dapm_clear_walk(w
->dapm
);
849 out
= is_connected_output_ep(w
);
850 dapm_clear_walk(w
->dapm
);
851 return out
!= 0 && in
!= 0;
854 /* Check to see if an ADC has power */
855 static int dapm_adc_check_power(struct snd_soc_dapm_widget
*w
)
859 DAPM_UPDATE_STAT(w
, power_checks
);
862 in
= is_connected_input_ep(w
);
863 dapm_clear_walk(w
->dapm
);
866 return dapm_generic_check_power(w
);
870 /* Check to see if a DAC has power */
871 static int dapm_dac_check_power(struct snd_soc_dapm_widget
*w
)
875 DAPM_UPDATE_STAT(w
, power_checks
);
878 out
= is_connected_output_ep(w
);
879 dapm_clear_walk(w
->dapm
);
882 return dapm_generic_check_power(w
);
886 /* Check to see if a power supply is needed */
887 static int dapm_supply_check_power(struct snd_soc_dapm_widget
*w
)
889 struct snd_soc_dapm_path
*path
;
891 DAPM_UPDATE_STAT(w
, power_checks
);
893 /* Check if one of our outputs is connected */
894 list_for_each_entry(path
, &w
->sinks
, list_source
) {
895 DAPM_UPDATE_STAT(w
, neighbour_checks
);
900 if (path
->connected
&&
901 !path
->connected(path
->source
, path
->sink
))
907 if (dapm_widget_power_check(path
->sink
))
911 dapm_clear_walk(w
->dapm
);
916 static int dapm_always_on_check_power(struct snd_soc_dapm_widget
*w
)
921 static int dapm_seq_compare(struct snd_soc_dapm_widget
*a
,
922 struct snd_soc_dapm_widget
*b
,
930 sort
= dapm_down_seq
;
932 if (sort
[a
->id
] != sort
[b
->id
])
933 return sort
[a
->id
] - sort
[b
->id
];
934 if (a
->subseq
!= b
->subseq
) {
936 return a
->subseq
- b
->subseq
;
938 return b
->subseq
- a
->subseq
;
940 if (a
->reg
!= b
->reg
)
941 return a
->reg
- b
->reg
;
942 if (a
->dapm
!= b
->dapm
)
943 return (unsigned long)a
->dapm
- (unsigned long)b
->dapm
;
948 /* Insert a widget in order into a DAPM power sequence. */
949 static void dapm_seq_insert(struct snd_soc_dapm_widget
*new_widget
,
950 struct list_head
*list
,
953 struct snd_soc_dapm_widget
*w
;
955 list_for_each_entry(w
, list
, power_list
)
956 if (dapm_seq_compare(new_widget
, w
, power_up
) < 0) {
957 list_add_tail(&new_widget
->power_list
, &w
->power_list
);
961 list_add_tail(&new_widget
->power_list
, list
);
964 static void dapm_seq_check_event(struct snd_soc_dapm_context
*dapm
,
965 struct snd_soc_dapm_widget
*w
, int event
)
967 struct snd_soc_card
*card
= dapm
->card
;
972 case SND_SOC_DAPM_PRE_PMU
:
976 case SND_SOC_DAPM_POST_PMU
:
977 ev_name
= "POST_PMU";
980 case SND_SOC_DAPM_PRE_PMD
:
984 case SND_SOC_DAPM_POST_PMD
:
985 ev_name
= "POST_PMD";
993 if (w
->power
!= power
)
996 if (w
->event
&& (w
->event_flags
& event
)) {
997 pop_dbg(dapm
->dev
, card
->pop_time
, "pop test : %s %s\n",
999 trace_snd_soc_dapm_widget_event_start(w
, event
);
1000 ret
= w
->event(w
, NULL
, event
);
1001 trace_snd_soc_dapm_widget_event_done(w
, event
);
1003 pr_err("%s: %s event failed: %d\n",
1004 ev_name
, w
->name
, ret
);
1008 /* Apply the coalesced changes from a DAPM sequence */
1009 static void dapm_seq_run_coalesced(struct snd_soc_dapm_context
*dapm
,
1010 struct list_head
*pending
)
1012 struct snd_soc_card
*card
= dapm
->card
;
1013 struct snd_soc_dapm_widget
*w
;
1015 unsigned int value
= 0;
1016 unsigned int mask
= 0;
1017 unsigned int cur_mask
;
1019 reg
= list_first_entry(pending
, struct snd_soc_dapm_widget
,
1022 list_for_each_entry(w
, pending
, power_list
) {
1023 cur_mask
= 1 << w
->shift
;
1024 BUG_ON(reg
!= w
->reg
);
1035 pop_dbg(dapm
->dev
, card
->pop_time
,
1036 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
1037 w
->name
, reg
, value
, mask
);
1039 /* Check for events */
1040 dapm_seq_check_event(dapm
, w
, SND_SOC_DAPM_PRE_PMU
);
1041 dapm_seq_check_event(dapm
, w
, SND_SOC_DAPM_PRE_PMD
);
1045 /* Any widget will do, they should all be updating the
1048 w
= list_first_entry(pending
, struct snd_soc_dapm_widget
,
1051 pop_dbg(dapm
->dev
, card
->pop_time
,
1052 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
1053 value
, mask
, reg
, card
->pop_time
);
1054 pop_wait(card
->pop_time
);
1055 soc_widget_update_bits(w
, reg
, mask
, value
);
1058 list_for_each_entry(w
, pending
, power_list
) {
1059 dapm_seq_check_event(dapm
, w
, SND_SOC_DAPM_POST_PMU
);
1060 dapm_seq_check_event(dapm
, w
, SND_SOC_DAPM_POST_PMD
);
1064 /* Apply a DAPM power sequence.
1066 * We walk over a pre-sorted list of widgets to apply power to. In
1067 * order to minimise the number of writes to the device required
1068 * multiple widgets will be updated in a single write where possible.
1069 * Currently anything that requires more than a single write is not
1072 static void dapm_seq_run(struct snd_soc_dapm_context
*dapm
,
1073 struct list_head
*list
, int event
, bool power_up
)
1075 struct snd_soc_dapm_widget
*w
, *n
;
1078 int cur_subseq
= -1;
1079 int cur_reg
= SND_SOC_NOPM
;
1080 struct snd_soc_dapm_context
*cur_dapm
= NULL
;
1087 sort
= dapm_down_seq
;
1089 list_for_each_entry_safe(w
, n
, list
, power_list
) {
1092 /* Do we need to apply any queued changes? */
1093 if (sort
[w
->id
] != cur_sort
|| w
->reg
!= cur_reg
||
1094 w
->dapm
!= cur_dapm
|| w
->subseq
!= cur_subseq
) {
1095 if (!list_empty(&pending
))
1096 dapm_seq_run_coalesced(cur_dapm
, &pending
);
1098 if (cur_dapm
&& cur_dapm
->seq_notifier
) {
1099 for (i
= 0; i
< ARRAY_SIZE(dapm_up_seq
); i
++)
1100 if (sort
[i
] == cur_sort
)
1101 cur_dapm
->seq_notifier(cur_dapm
,
1106 INIT_LIST_HEAD(&pending
);
1108 cur_subseq
= INT_MIN
;
1109 cur_reg
= SND_SOC_NOPM
;
1114 case snd_soc_dapm_pre
:
1116 list_for_each_entry_safe_continue(w
, n
, list
,
1119 if (event
== SND_SOC_DAPM_STREAM_START
)
1121 NULL
, SND_SOC_DAPM_PRE_PMU
);
1122 else if (event
== SND_SOC_DAPM_STREAM_STOP
)
1124 NULL
, SND_SOC_DAPM_PRE_PMD
);
1127 case snd_soc_dapm_post
:
1129 list_for_each_entry_safe_continue(w
, n
, list
,
1132 if (event
== SND_SOC_DAPM_STREAM_START
)
1134 NULL
, SND_SOC_DAPM_POST_PMU
);
1135 else if (event
== SND_SOC_DAPM_STREAM_STOP
)
1137 NULL
, SND_SOC_DAPM_POST_PMD
);
1141 /* Queue it up for application */
1142 cur_sort
= sort
[w
->id
];
1143 cur_subseq
= w
->subseq
;
1146 list_move(&w
->power_list
, &pending
);
1151 dev_err(w
->dapm
->dev
,
1152 "Failed to apply widget power: %d\n", ret
);
1155 if (!list_empty(&pending
))
1156 dapm_seq_run_coalesced(cur_dapm
, &pending
);
1158 if (cur_dapm
&& cur_dapm
->seq_notifier
) {
1159 for (i
= 0; i
< ARRAY_SIZE(dapm_up_seq
); i
++)
1160 if (sort
[i
] == cur_sort
)
1161 cur_dapm
->seq_notifier(cur_dapm
,
1166 static void dapm_widget_update(struct snd_soc_dapm_context
*dapm
)
1168 struct snd_soc_dapm_update
*update
= dapm
->update
;
1169 struct snd_soc_dapm_widget
*w
;
1178 (w
->event_flags
& SND_SOC_DAPM_PRE_REG
)) {
1179 ret
= w
->event(w
, update
->kcontrol
, SND_SOC_DAPM_PRE_REG
);
1181 pr_err("%s DAPM pre-event failed: %d\n",
1185 ret
= snd_soc_update_bits(w
->codec
, update
->reg
, update
->mask
,
1188 pr_err("%s DAPM update failed: %d\n", w
->name
, ret
);
1191 (w
->event_flags
& SND_SOC_DAPM_POST_REG
)) {
1192 ret
= w
->event(w
, update
->kcontrol
, SND_SOC_DAPM_POST_REG
);
1194 pr_err("%s DAPM post-event failed: %d\n",
1199 /* Async callback run prior to DAPM sequences - brings to _PREPARE if
1200 * they're changing state.
1202 static void dapm_pre_sequence_async(void *data
, async_cookie_t cookie
)
1204 struct snd_soc_dapm_context
*d
= data
;
1207 /* If we're off and we're not supposed to be go into STANDBY */
1208 if (d
->bias_level
== SND_SOC_BIAS_OFF
&&
1209 d
->target_bias_level
!= SND_SOC_BIAS_OFF
) {
1211 pm_runtime_get_sync(d
->dev
);
1213 ret
= snd_soc_dapm_set_bias_level(d
, SND_SOC_BIAS_STANDBY
);
1216 "Failed to turn on bias: %d\n", ret
);
1219 /* Prepare for a STADDBY->ON or ON->STANDBY transition */
1220 if (d
->bias_level
!= d
->target_bias_level
) {
1221 ret
= snd_soc_dapm_set_bias_level(d
, SND_SOC_BIAS_PREPARE
);
1224 "Failed to prepare bias: %d\n", ret
);
1228 /* Async callback run prior to DAPM sequences - brings to their final
1231 static void dapm_post_sequence_async(void *data
, async_cookie_t cookie
)
1233 struct snd_soc_dapm_context
*d
= data
;
1236 /* If we just powered the last thing off drop to standby bias */
1237 if (d
->bias_level
== SND_SOC_BIAS_PREPARE
&&
1238 (d
->target_bias_level
== SND_SOC_BIAS_STANDBY
||
1239 d
->target_bias_level
== SND_SOC_BIAS_OFF
)) {
1240 ret
= snd_soc_dapm_set_bias_level(d
, SND_SOC_BIAS_STANDBY
);
1242 dev_err(d
->dev
, "Failed to apply standby bias: %d\n",
1246 /* If we're in standby and can support bias off then do that */
1247 if (d
->bias_level
== SND_SOC_BIAS_STANDBY
&&
1248 d
->target_bias_level
== SND_SOC_BIAS_OFF
) {
1249 ret
= snd_soc_dapm_set_bias_level(d
, SND_SOC_BIAS_OFF
);
1251 dev_err(d
->dev
, "Failed to turn off bias: %d\n", ret
);
1254 pm_runtime_put_sync(d
->dev
);
1257 /* If we just powered up then move to active bias */
1258 if (d
->bias_level
== SND_SOC_BIAS_PREPARE
&&
1259 d
->target_bias_level
== SND_SOC_BIAS_ON
) {
1260 ret
= snd_soc_dapm_set_bias_level(d
, SND_SOC_BIAS_ON
);
1262 dev_err(d
->dev
, "Failed to apply active bias: %d\n",
1267 static void dapm_widget_set_peer_power(struct snd_soc_dapm_widget
*peer
,
1268 bool power
, bool connect
)
1270 /* If a connection is being made or broken then that update
1271 * will have marked the peer dirty, otherwise the widgets are
1272 * not connected and this update has no impact. */
1276 /* If the peer is already in the state we're moving to then we
1277 * won't have an impact on it. */
1278 if (power
!= peer
->power
)
1279 dapm_mark_dirty(peer
, "peer state change");
1282 static void dapm_widget_set_power(struct snd_soc_dapm_widget
*w
, bool power
,
1283 struct list_head
*up_list
,
1284 struct list_head
*down_list
)
1286 struct snd_soc_dapm_path
*path
;
1288 if (w
->power
== power
)
1291 trace_snd_soc_dapm_widget_power(w
, power
);
1293 /* If we changed our power state perhaps our neigbours changed
1296 list_for_each_entry(path
, &w
->sources
, list_sink
) {
1298 dapm_widget_set_peer_power(path
->source
, power
,
1303 case snd_soc_dapm_supply
:
1304 /* Supplies can't affect their outputs, only their inputs */
1307 list_for_each_entry(path
, &w
->sinks
, list_source
) {
1309 dapm_widget_set_peer_power(path
->sink
, power
,
1317 dapm_seq_insert(w
, up_list
, true);
1319 dapm_seq_insert(w
, down_list
, false);
1324 static void dapm_power_one_widget(struct snd_soc_dapm_widget
*w
,
1325 struct list_head
*up_list
,
1326 struct list_head
*down_list
)
1331 case snd_soc_dapm_pre
:
1332 dapm_seq_insert(w
, down_list
, false);
1334 case snd_soc_dapm_post
:
1335 dapm_seq_insert(w
, up_list
, true);
1339 power
= dapm_widget_power_check(w
);
1341 dapm_widget_set_power(w
, power
, up_list
, down_list
);
1347 * Scan each dapm widget for complete audio path.
1348 * A complete path is a route that has valid endpoints i.e.:-
1350 * o DAC to output pin.
1351 * o Input Pin to ADC.
1352 * o Input pin to Output pin (bypass, sidetone)
1353 * o DAC to ADC (loopback).
1355 static int dapm_power_widgets(struct snd_soc_dapm_context
*dapm
, int event
)
1357 struct snd_soc_card
*card
= dapm
->card
;
1358 struct snd_soc_dapm_widget
*w
;
1359 struct snd_soc_dapm_context
*d
;
1361 LIST_HEAD(down_list
);
1362 LIST_HEAD(async_domain
);
1363 enum snd_soc_bias_level bias
;
1365 trace_snd_soc_dapm_start(card
);
1367 list_for_each_entry(d
, &card
->dapm_list
, list
) {
1368 if (d
->n_widgets
|| d
->codec
== NULL
) {
1369 if (d
->idle_bias_off
)
1370 d
->target_bias_level
= SND_SOC_BIAS_OFF
;
1372 d
->target_bias_level
= SND_SOC_BIAS_STANDBY
;
1376 memset(&card
->dapm_stats
, 0, sizeof(card
->dapm_stats
));
1378 list_for_each_entry(w
, &card
->widgets
, list
) {
1379 w
->power_checked
= false;
1384 /* Check which widgets we need to power and store them in
1385 * lists indicating if they should be powered up or down. We
1386 * only check widgets that have been flagged as dirty but note
1387 * that new widgets may be added to the dirty list while we
1390 list_for_each_entry(w
, &card
->dapm_dirty
, dirty
) {
1391 dapm_power_one_widget(w
, &up_list
, &down_list
);
1394 list_for_each_entry(w
, &card
->widgets
, list
) {
1395 list_del_init(&w
->dirty
);
1400 /* Supplies and micbiases only bring the
1401 * context up to STANDBY as unless something
1402 * else is active and passing audio they
1403 * generally don't require full power.
1406 case snd_soc_dapm_supply
:
1407 case snd_soc_dapm_micbias
:
1408 if (d
->target_bias_level
< SND_SOC_BIAS_STANDBY
)
1409 d
->target_bias_level
= SND_SOC_BIAS_STANDBY
;
1412 d
->target_bias_level
= SND_SOC_BIAS_ON
;
1419 /* If there are no DAPM widgets then try to figure out power from the
1422 if (!dapm
->n_widgets
) {
1424 case SND_SOC_DAPM_STREAM_START
:
1425 case SND_SOC_DAPM_STREAM_RESUME
:
1426 dapm
->target_bias_level
= SND_SOC_BIAS_ON
;
1428 case SND_SOC_DAPM_STREAM_STOP
:
1429 if (dapm
->codec
&& dapm
->codec
->active
)
1430 dapm
->target_bias_level
= SND_SOC_BIAS_ON
;
1432 dapm
->target_bias_level
= SND_SOC_BIAS_STANDBY
;
1434 case SND_SOC_DAPM_STREAM_SUSPEND
:
1435 dapm
->target_bias_level
= SND_SOC_BIAS_STANDBY
;
1437 case SND_SOC_DAPM_STREAM_NOP
:
1438 dapm
->target_bias_level
= dapm
->bias_level
;
1445 /* Force all contexts in the card to the same bias state if
1446 * they're not ground referenced.
1448 bias
= SND_SOC_BIAS_OFF
;
1449 list_for_each_entry(d
, &card
->dapm_list
, list
)
1450 if (d
->target_bias_level
> bias
)
1451 bias
= d
->target_bias_level
;
1452 list_for_each_entry(d
, &card
->dapm_list
, list
)
1453 if (!d
->idle_bias_off
)
1454 d
->target_bias_level
= bias
;
1456 trace_snd_soc_dapm_walk_done(card
);
1458 /* Run all the bias changes in parallel */
1459 list_for_each_entry(d
, &dapm
->card
->dapm_list
, list
)
1460 async_schedule_domain(dapm_pre_sequence_async
, d
,
1462 async_synchronize_full_domain(&async_domain
);
1464 /* Power down widgets first; try to avoid amplifying pops. */
1465 dapm_seq_run(dapm
, &down_list
, event
, false);
1467 dapm_widget_update(dapm
);
1470 dapm_seq_run(dapm
, &up_list
, event
, true);
1472 /* Run all the bias changes in parallel */
1473 list_for_each_entry(d
, &dapm
->card
->dapm_list
, list
)
1474 async_schedule_domain(dapm_post_sequence_async
, d
,
1476 async_synchronize_full_domain(&async_domain
);
1478 pop_dbg(dapm
->dev
, card
->pop_time
,
1479 "DAPM sequencing finished, waiting %dms\n", card
->pop_time
);
1480 pop_wait(card
->pop_time
);
1482 trace_snd_soc_dapm_done(card
);
1487 #ifdef CONFIG_DEBUG_FS
1488 static int dapm_widget_power_open_file(struct inode
*inode
, struct file
*file
)
1490 file
->private_data
= inode
->i_private
;
1494 static ssize_t
dapm_widget_power_read_file(struct file
*file
,
1495 char __user
*user_buf
,
1496 size_t count
, loff_t
*ppos
)
1498 struct snd_soc_dapm_widget
*w
= file
->private_data
;
1502 struct snd_soc_dapm_path
*p
= NULL
;
1504 buf
= kmalloc(PAGE_SIZE
, GFP_KERNEL
);
1508 in
= is_connected_input_ep(w
);
1509 dapm_clear_walk(w
->dapm
);
1510 out
= is_connected_output_ep(w
);
1511 dapm_clear_walk(w
->dapm
);
1513 ret
= snprintf(buf
, PAGE_SIZE
, "%s: %s in %d out %d",
1514 w
->name
, w
->power
? "On" : "Off", in
, out
);
1517 ret
+= snprintf(buf
+ ret
, PAGE_SIZE
- ret
,
1518 " - R%d(0x%x) bit %d",
1519 w
->reg
, w
->reg
, w
->shift
);
1521 ret
+= snprintf(buf
+ ret
, PAGE_SIZE
- ret
, "\n");
1524 ret
+= snprintf(buf
+ ret
, PAGE_SIZE
- ret
, " stream %s %s\n",
1526 w
->active
? "active" : "inactive");
1528 list_for_each_entry(p
, &w
->sources
, list_sink
) {
1529 if (p
->connected
&& !p
->connected(w
, p
->sink
))
1533 ret
+= snprintf(buf
+ ret
, PAGE_SIZE
- ret
,
1534 " in \"%s\" \"%s\"\n",
1535 p
->name
? p
->name
: "static",
1538 list_for_each_entry(p
, &w
->sinks
, list_source
) {
1539 if (p
->connected
&& !p
->connected(w
, p
->sink
))
1543 ret
+= snprintf(buf
+ ret
, PAGE_SIZE
- ret
,
1544 " out \"%s\" \"%s\"\n",
1545 p
->name
? p
->name
: "static",
1549 ret
= simple_read_from_buffer(user_buf
, count
, ppos
, buf
, ret
);
1555 static const struct file_operations dapm_widget_power_fops
= {
1556 .open
= dapm_widget_power_open_file
,
1557 .read
= dapm_widget_power_read_file
,
1558 .llseek
= default_llseek
,
1561 static int dapm_bias_open_file(struct inode
*inode
, struct file
*file
)
1563 file
->private_data
= inode
->i_private
;
1567 static ssize_t
dapm_bias_read_file(struct file
*file
, char __user
*user_buf
,
1568 size_t count
, loff_t
*ppos
)
1570 struct snd_soc_dapm_context
*dapm
= file
->private_data
;
1573 switch (dapm
->bias_level
) {
1574 case SND_SOC_BIAS_ON
:
1577 case SND_SOC_BIAS_PREPARE
:
1578 level
= "Prepare\n";
1580 case SND_SOC_BIAS_STANDBY
:
1581 level
= "Standby\n";
1583 case SND_SOC_BIAS_OFF
:
1588 level
= "Unknown\n";
1592 return simple_read_from_buffer(user_buf
, count
, ppos
, level
,
1596 static const struct file_operations dapm_bias_fops
= {
1597 .open
= dapm_bias_open_file
,
1598 .read
= dapm_bias_read_file
,
1599 .llseek
= default_llseek
,
1602 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context
*dapm
,
1603 struct dentry
*parent
)
1607 dapm
->debugfs_dapm
= debugfs_create_dir("dapm", parent
);
1609 if (!dapm
->debugfs_dapm
) {
1611 "Failed to create DAPM debugfs directory\n");
1615 d
= debugfs_create_file("bias_level", 0444,
1616 dapm
->debugfs_dapm
, dapm
,
1620 "ASoC: Failed to create bias level debugfs file\n");
1623 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget
*w
)
1625 struct snd_soc_dapm_context
*dapm
= w
->dapm
;
1628 if (!dapm
->debugfs_dapm
|| !w
->name
)
1631 d
= debugfs_create_file(w
->name
, 0444,
1632 dapm
->debugfs_dapm
, w
,
1633 &dapm_widget_power_fops
);
1635 dev_warn(w
->dapm
->dev
,
1636 "ASoC: Failed to create %s debugfs file\n",
1640 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context
*dapm
)
1642 debugfs_remove_recursive(dapm
->debugfs_dapm
);
1646 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context
*dapm
,
1647 struct dentry
*parent
)
1651 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget
*w
)
1655 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context
*dapm
)
1661 /* test and update the power status of a mux widget */
1662 static int dapm_mux_update_power(struct snd_soc_dapm_widget
*widget
,
1663 struct snd_kcontrol
*kcontrol
, int change
,
1664 int mux
, struct soc_enum
*e
)
1666 struct snd_soc_dapm_path
*path
;
1669 if (widget
->id
!= snd_soc_dapm_mux
&&
1670 widget
->id
!= snd_soc_dapm_virt_mux
&&
1671 widget
->id
!= snd_soc_dapm_value_mux
)
1677 /* find dapm widget path assoc with kcontrol */
1678 list_for_each_entry(path
, &widget
->dapm
->card
->paths
, list
) {
1679 if (path
->kcontrol
!= kcontrol
)
1682 if (!path
->name
|| !e
->texts
[mux
])
1686 /* we now need to match the string in the enum to the path */
1687 if (!(strcmp(path
->name
, e
->texts
[mux
]))) {
1688 path
->connect
= 1; /* new connection */
1689 dapm_mark_dirty(path
->source
, "mux connection");
1692 dapm_mark_dirty(path
->source
,
1693 "mux disconnection");
1694 path
->connect
= 0; /* old connection must be powered down */
1699 dapm_mark_dirty(widget
, "mux change");
1700 dapm_power_widgets(widget
->dapm
, SND_SOC_DAPM_STREAM_NOP
);
1706 /* test and update the power status of a mixer or switch widget */
1707 static int dapm_mixer_update_power(struct snd_soc_dapm_widget
*widget
,
1708 struct snd_kcontrol
*kcontrol
, int connect
)
1710 struct snd_soc_dapm_path
*path
;
1713 if (widget
->id
!= snd_soc_dapm_mixer
&&
1714 widget
->id
!= snd_soc_dapm_mixer_named_ctl
&&
1715 widget
->id
!= snd_soc_dapm_switch
)
1718 /* find dapm widget path assoc with kcontrol */
1719 list_for_each_entry(path
, &widget
->dapm
->card
->paths
, list
) {
1720 if (path
->kcontrol
!= kcontrol
)
1723 /* found, now check type */
1725 path
->connect
= connect
;
1726 dapm_mark_dirty(path
->source
, "mixer connection");
1730 dapm_mark_dirty(widget
, "mixer update");
1731 dapm_power_widgets(widget
->dapm
, SND_SOC_DAPM_STREAM_NOP
);
1737 /* show dapm widget status in sys fs */
1738 static ssize_t
dapm_widget_show(struct device
*dev
,
1739 struct device_attribute
*attr
, char *buf
)
1741 struct snd_soc_pcm_runtime
*rtd
= dev_get_drvdata(dev
);
1742 struct snd_soc_codec
*codec
=rtd
->codec
;
1743 struct snd_soc_dapm_widget
*w
;
1745 char *state
= "not set";
1747 list_for_each_entry(w
, &codec
->card
->widgets
, list
) {
1748 if (w
->dapm
!= &codec
->dapm
)
1751 /* only display widgets that burnm power */
1753 case snd_soc_dapm_hp
:
1754 case snd_soc_dapm_mic
:
1755 case snd_soc_dapm_spk
:
1756 case snd_soc_dapm_line
:
1757 case snd_soc_dapm_micbias
:
1758 case snd_soc_dapm_dac
:
1759 case snd_soc_dapm_adc
:
1760 case snd_soc_dapm_pga
:
1761 case snd_soc_dapm_out_drv
:
1762 case snd_soc_dapm_mixer
:
1763 case snd_soc_dapm_mixer_named_ctl
:
1764 case snd_soc_dapm_supply
:
1766 count
+= sprintf(buf
+ count
, "%s: %s\n",
1767 w
->name
, w
->power
? "On":"Off");
1774 switch (codec
->dapm
.bias_level
) {
1775 case SND_SOC_BIAS_ON
:
1778 case SND_SOC_BIAS_PREPARE
:
1781 case SND_SOC_BIAS_STANDBY
:
1784 case SND_SOC_BIAS_OFF
:
1788 count
+= sprintf(buf
+ count
, "PM State: %s\n", state
);
1793 static DEVICE_ATTR(dapm_widget
, 0444, dapm_widget_show
, NULL
);
1795 int snd_soc_dapm_sys_add(struct device
*dev
)
1797 return device_create_file(dev
, &dev_attr_dapm_widget
);
1800 static void snd_soc_dapm_sys_remove(struct device
*dev
)
1802 device_remove_file(dev
, &dev_attr_dapm_widget
);
1805 /* free all dapm widgets and resources */
1806 static void dapm_free_widgets(struct snd_soc_dapm_context
*dapm
)
1808 struct snd_soc_dapm_widget
*w
, *next_w
;
1809 struct snd_soc_dapm_path
*p
, *next_p
;
1811 list_for_each_entry_safe(w
, next_w
, &dapm
->card
->widgets
, list
) {
1812 if (w
->dapm
!= dapm
)
1816 * remove source and sink paths associated to this widget.
1817 * While removing the path, remove reference to it from both
1818 * source and sink widgets so that path is removed only once.
1820 list_for_each_entry_safe(p
, next_p
, &w
->sources
, list_sink
) {
1821 list_del(&p
->list_sink
);
1822 list_del(&p
->list_source
);
1824 kfree(p
->long_name
);
1827 list_for_each_entry_safe(p
, next_p
, &w
->sinks
, list_source
) {
1828 list_del(&p
->list_sink
);
1829 list_del(&p
->list_source
);
1831 kfree(p
->long_name
);
1834 kfree(w
->kcontrols
);
1840 static struct snd_soc_dapm_widget
*dapm_find_widget(
1841 struct snd_soc_dapm_context
*dapm
, const char *pin
,
1842 bool search_other_contexts
)
1844 struct snd_soc_dapm_widget
*w
;
1845 struct snd_soc_dapm_widget
*fallback
= NULL
;
1847 list_for_each_entry(w
, &dapm
->card
->widgets
, list
) {
1848 if (!strcmp(w
->name
, pin
)) {
1849 if (w
->dapm
== dapm
)
1856 if (search_other_contexts
)
1862 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context
*dapm
,
1863 const char *pin
, int status
)
1865 struct snd_soc_dapm_widget
*w
= dapm_find_widget(dapm
, pin
, true);
1868 dev_err(dapm
->dev
, "dapm: unknown pin %s\n", pin
);
1872 w
->connected
= status
;
1875 dapm_mark_dirty(w
, "pin configuration");
1881 * snd_soc_dapm_sync - scan and power dapm paths
1882 * @dapm: DAPM context
1884 * Walks all dapm audio paths and powers widgets according to their
1885 * stream or path usage.
1887 * Returns 0 for success.
1889 int snd_soc_dapm_sync(struct snd_soc_dapm_context
*dapm
)
1892 * Suppress early reports (eg, jacks syncing their state) to avoid
1893 * silly DAPM runs during card startup.
1895 if (!dapm
->card
|| !dapm
->card
->instantiated
)
1898 return dapm_power_widgets(dapm
, SND_SOC_DAPM_STREAM_NOP
);
1900 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync
);
1902 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context
*dapm
,
1903 const struct snd_soc_dapm_route
*route
)
1905 struct snd_soc_dapm_path
*path
;
1906 struct snd_soc_dapm_widget
*wsource
= NULL
, *wsink
= NULL
, *w
;
1907 struct snd_soc_dapm_widget
*wtsource
= NULL
, *wtsink
= NULL
;
1909 const char *control
= route
->control
;
1911 char prefixed_sink
[80];
1912 char prefixed_source
[80];
1915 if (dapm
->codec
&& dapm
->codec
->name_prefix
) {
1916 snprintf(prefixed_sink
, sizeof(prefixed_sink
), "%s %s",
1917 dapm
->codec
->name_prefix
, route
->sink
);
1918 sink
= prefixed_sink
;
1919 snprintf(prefixed_source
, sizeof(prefixed_source
), "%s %s",
1920 dapm
->codec
->name_prefix
, route
->source
);
1921 source
= prefixed_source
;
1924 source
= route
->source
;
1928 * find src and dest widgets over all widgets but favor a widget from
1929 * current DAPM context
1931 list_for_each_entry(w
, &dapm
->card
->widgets
, list
) {
1932 if (!wsink
&& !(strcmp(w
->name
, sink
))) {
1934 if (w
->dapm
== dapm
)
1938 if (!wsource
&& !(strcmp(w
->name
, source
))) {
1940 if (w
->dapm
== dapm
)
1944 /* use widget from another DAPM context if not found from this */
1950 if (wsource
== NULL
|| wsink
== NULL
)
1953 path
= kzalloc(sizeof(struct snd_soc_dapm_path
), GFP_KERNEL
);
1957 path
->source
= wsource
;
1959 path
->connected
= route
->connected
;
1960 INIT_LIST_HEAD(&path
->list
);
1961 INIT_LIST_HEAD(&path
->list_source
);
1962 INIT_LIST_HEAD(&path
->list_sink
);
1964 /* check for external widgets */
1965 if (wsink
->id
== snd_soc_dapm_input
) {
1966 if (wsource
->id
== snd_soc_dapm_micbias
||
1967 wsource
->id
== snd_soc_dapm_mic
||
1968 wsource
->id
== snd_soc_dapm_line
||
1969 wsource
->id
== snd_soc_dapm_output
)
1972 if (wsource
->id
== snd_soc_dapm_output
) {
1973 if (wsink
->id
== snd_soc_dapm_spk
||
1974 wsink
->id
== snd_soc_dapm_hp
||
1975 wsink
->id
== snd_soc_dapm_line
||
1976 wsink
->id
== snd_soc_dapm_input
)
1980 /* connect static paths */
1981 if (control
== NULL
) {
1982 list_add(&path
->list
, &dapm
->card
->paths
);
1983 list_add(&path
->list_sink
, &wsink
->sources
);
1984 list_add(&path
->list_source
, &wsource
->sinks
);
1989 /* connect dynamic paths */
1990 switch (wsink
->id
) {
1991 case snd_soc_dapm_adc
:
1992 case snd_soc_dapm_dac
:
1993 case snd_soc_dapm_pga
:
1994 case snd_soc_dapm_out_drv
:
1995 case snd_soc_dapm_input
:
1996 case snd_soc_dapm_output
:
1997 case snd_soc_dapm_siggen
:
1998 case snd_soc_dapm_micbias
:
1999 case snd_soc_dapm_vmid
:
2000 case snd_soc_dapm_pre
:
2001 case snd_soc_dapm_post
:
2002 case snd_soc_dapm_supply
:
2003 case snd_soc_dapm_aif_in
:
2004 case snd_soc_dapm_aif_out
:
2005 list_add(&path
->list
, &dapm
->card
->paths
);
2006 list_add(&path
->list_sink
, &wsink
->sources
);
2007 list_add(&path
->list_source
, &wsource
->sinks
);
2010 case snd_soc_dapm_mux
:
2011 case snd_soc_dapm_virt_mux
:
2012 case snd_soc_dapm_value_mux
:
2013 ret
= dapm_connect_mux(dapm
, wsource
, wsink
, path
, control
,
2014 &wsink
->kcontrol_news
[0]);
2018 case snd_soc_dapm_switch
:
2019 case snd_soc_dapm_mixer
:
2020 case snd_soc_dapm_mixer_named_ctl
:
2021 ret
= dapm_connect_mixer(dapm
, wsource
, wsink
, path
, control
);
2025 case snd_soc_dapm_hp
:
2026 case snd_soc_dapm_mic
:
2027 case snd_soc_dapm_line
:
2028 case snd_soc_dapm_spk
:
2029 list_add(&path
->list
, &dapm
->card
->paths
);
2030 list_add(&path
->list_sink
, &wsink
->sources
);
2031 list_add(&path
->list_source
, &wsource
->sinks
);
2038 dev_warn(dapm
->dev
, "asoc: no dapm match for %s --> %s --> %s\n",
2039 source
, control
, sink
);
2045 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
2046 * @dapm: DAPM context
2047 * @route: audio routes
2048 * @num: number of routes
2050 * Connects 2 dapm widgets together via a named audio path. The sink is
2051 * the widget receiving the audio signal, whilst the source is the sender
2052 * of the audio signal.
2054 * Returns 0 for success else error. On error all resources can be freed
2055 * with a call to snd_soc_card_free().
2057 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context
*dapm
,
2058 const struct snd_soc_dapm_route
*route
, int num
)
2062 for (i
= 0; i
< num
; i
++) {
2063 ret
= snd_soc_dapm_add_route(dapm
, route
);
2065 dev_err(dapm
->dev
, "Failed to add route %s->%s\n",
2066 route
->source
, route
->sink
);
2074 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes
);
2076 static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context
*dapm
,
2077 const struct snd_soc_dapm_route
*route
)
2079 struct snd_soc_dapm_widget
*source
= dapm_find_widget(dapm
,
2082 struct snd_soc_dapm_widget
*sink
= dapm_find_widget(dapm
,
2085 struct snd_soc_dapm_path
*path
;
2089 dev_err(dapm
->dev
, "Unable to find source %s for weak route\n",
2095 dev_err(dapm
->dev
, "Unable to find sink %s for weak route\n",
2100 if (route
->control
|| route
->connected
)
2101 dev_warn(dapm
->dev
, "Ignoring control for weak route %s->%s\n",
2102 route
->source
, route
->sink
);
2104 list_for_each_entry(path
, &source
->sinks
, list_source
) {
2105 if (path
->sink
== sink
) {
2112 dev_err(dapm
->dev
, "No path found for weak route %s->%s\n",
2113 route
->source
, route
->sink
);
2115 dev_warn(dapm
->dev
, "%d paths found for weak route %s->%s\n",
2116 count
, route
->source
, route
->sink
);
2122 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
2123 * @dapm: DAPM context
2124 * @route: audio routes
2125 * @num: number of routes
2127 * Mark existing routes matching those specified in the passed array
2128 * as being weak, meaning that they are ignored for the purpose of
2129 * power decisions. The main intended use case is for sidetone paths
2130 * which couple audio between other independent paths if they are both
2131 * active in order to make the combination work better at the user
2132 * level but which aren't intended to be "used".
2134 * Note that CODEC drivers should not use this as sidetone type paths
2135 * can frequently also be used as bypass paths.
2137 int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context
*dapm
,
2138 const struct snd_soc_dapm_route
*route
, int num
)
2143 for (i
= 0; i
< num
; i
++) {
2144 err
= snd_soc_dapm_weak_route(dapm
, route
);
2152 EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes
);
2155 * snd_soc_dapm_new_widgets - add new dapm widgets
2156 * @dapm: DAPM context
2158 * Checks the codec for any new dapm widgets and creates them if found.
2160 * Returns 0 for success.
2162 int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context
*dapm
)
2164 struct snd_soc_dapm_widget
*w
;
2167 list_for_each_entry(w
, &dapm
->card
->widgets
, list
)
2172 if (w
->num_kcontrols
) {
2173 w
->kcontrols
= kzalloc(w
->num_kcontrols
*
2174 sizeof(struct snd_kcontrol
*),
2181 case snd_soc_dapm_switch
:
2182 case snd_soc_dapm_mixer
:
2183 case snd_soc_dapm_mixer_named_ctl
:
2186 case snd_soc_dapm_mux
:
2187 case snd_soc_dapm_virt_mux
:
2188 case snd_soc_dapm_value_mux
:
2191 case snd_soc_dapm_pga
:
2192 case snd_soc_dapm_out_drv
:
2199 /* Read the initial power state from the device */
2201 val
= soc_widget_read(w
, w
->reg
);
2202 val
&= 1 << w
->shift
;
2212 dapm_mark_dirty(w
, "new widget");
2213 dapm_debugfs_add_widget(w
);
2216 dapm_power_widgets(dapm
, SND_SOC_DAPM_STREAM_NOP
);
2219 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets
);
2222 * snd_soc_dapm_get_volsw - dapm mixer get callback
2223 * @kcontrol: mixer control
2224 * @ucontrol: control element information
2226 * Callback to get the value of a dapm mixer control.
2228 * Returns 0 for success.
2230 int snd_soc_dapm_get_volsw(struct snd_kcontrol
*kcontrol
,
2231 struct snd_ctl_elem_value
*ucontrol
)
2233 struct snd_soc_dapm_widget_list
*wlist
= snd_kcontrol_chip(kcontrol
);
2234 struct snd_soc_dapm_widget
*widget
= wlist
->widgets
[0];
2235 struct soc_mixer_control
*mc
=
2236 (struct soc_mixer_control
*)kcontrol
->private_value
;
2237 unsigned int reg
= mc
->reg
;
2238 unsigned int shift
= mc
->shift
;
2239 unsigned int rshift
= mc
->rshift
;
2241 unsigned int invert
= mc
->invert
;
2242 unsigned int mask
= (1 << fls(max
)) - 1;
2244 ucontrol
->value
.integer
.value
[0] =
2245 (snd_soc_read(widget
->codec
, reg
) >> shift
) & mask
;
2246 if (shift
!= rshift
)
2247 ucontrol
->value
.integer
.value
[1] =
2248 (snd_soc_read(widget
->codec
, reg
) >> rshift
) & mask
;
2250 ucontrol
->value
.integer
.value
[0] =
2251 max
- ucontrol
->value
.integer
.value
[0];
2252 if (shift
!= rshift
)
2253 ucontrol
->value
.integer
.value
[1] =
2254 max
- ucontrol
->value
.integer
.value
[1];
2259 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw
);
2262 * snd_soc_dapm_put_volsw - dapm mixer set callback
2263 * @kcontrol: mixer control
2264 * @ucontrol: control element information
2266 * Callback to set the value of a dapm mixer control.
2268 * Returns 0 for success.
2270 int snd_soc_dapm_put_volsw(struct snd_kcontrol
*kcontrol
,
2271 struct snd_ctl_elem_value
*ucontrol
)
2273 struct snd_soc_dapm_widget_list
*wlist
= snd_kcontrol_chip(kcontrol
);
2274 struct snd_soc_dapm_widget
*widget
= wlist
->widgets
[0];
2275 struct snd_soc_codec
*codec
= widget
->codec
;
2276 struct soc_mixer_control
*mc
=
2277 (struct soc_mixer_control
*)kcontrol
->private_value
;
2278 unsigned int reg
= mc
->reg
;
2279 unsigned int shift
= mc
->shift
;
2281 unsigned int mask
= (1 << fls(max
)) - 1;
2282 unsigned int invert
= mc
->invert
;
2284 int connect
, change
;
2285 struct snd_soc_dapm_update update
;
2288 val
= (ucontrol
->value
.integer
.value
[0] & mask
);
2292 mask
= mask
<< shift
;
2296 /* new connection */
2297 connect
= invert
? 0 : 1;
2299 /* old connection must be powered down */
2300 connect
= invert
? 1 : 0;
2302 mutex_lock(&codec
->mutex
);
2304 change
= snd_soc_test_bits(widget
->codec
, reg
, mask
, val
);
2306 for (wi
= 0; wi
< wlist
->num_widgets
; wi
++) {
2307 widget
= wlist
->widgets
[wi
];
2309 widget
->value
= val
;
2311 update
.kcontrol
= kcontrol
;
2312 update
.widget
= widget
;
2316 widget
->dapm
->update
= &update
;
2318 dapm_mixer_update_power(widget
, kcontrol
, connect
);
2320 widget
->dapm
->update
= NULL
;
2324 mutex_unlock(&codec
->mutex
);
2327 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw
);
2330 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
2331 * @kcontrol: mixer control
2332 * @ucontrol: control element information
2334 * Callback to get the value of a dapm enumerated double mixer control.
2336 * Returns 0 for success.
2338 int snd_soc_dapm_get_enum_double(struct snd_kcontrol
*kcontrol
,
2339 struct snd_ctl_elem_value
*ucontrol
)
2341 struct snd_soc_dapm_widget_list
*wlist
= snd_kcontrol_chip(kcontrol
);
2342 struct snd_soc_dapm_widget
*widget
= wlist
->widgets
[0];
2343 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
2344 unsigned int val
, bitmask
;
2346 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
2348 val
= snd_soc_read(widget
->codec
, e
->reg
);
2349 ucontrol
->value
.enumerated
.item
[0] = (val
>> e
->shift_l
) & (bitmask
- 1);
2350 if (e
->shift_l
!= e
->shift_r
)
2351 ucontrol
->value
.enumerated
.item
[1] =
2352 (val
>> e
->shift_r
) & (bitmask
- 1);
2356 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double
);
2359 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
2360 * @kcontrol: mixer control
2361 * @ucontrol: control element information
2363 * Callback to set the value of a dapm enumerated double mixer control.
2365 * Returns 0 for success.
2367 int snd_soc_dapm_put_enum_double(struct snd_kcontrol
*kcontrol
,
2368 struct snd_ctl_elem_value
*ucontrol
)
2370 struct snd_soc_dapm_widget_list
*wlist
= snd_kcontrol_chip(kcontrol
);
2371 struct snd_soc_dapm_widget
*widget
= wlist
->widgets
[0];
2372 struct snd_soc_codec
*codec
= widget
->codec
;
2373 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
2374 unsigned int val
, mux
, change
;
2375 unsigned int mask
, bitmask
;
2376 struct snd_soc_dapm_update update
;
2379 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
2381 if (ucontrol
->value
.enumerated
.item
[0] > e
->max
- 1)
2383 mux
= ucontrol
->value
.enumerated
.item
[0];
2384 val
= mux
<< e
->shift_l
;
2385 mask
= (bitmask
- 1) << e
->shift_l
;
2386 if (e
->shift_l
!= e
->shift_r
) {
2387 if (ucontrol
->value
.enumerated
.item
[1] > e
->max
- 1)
2389 val
|= ucontrol
->value
.enumerated
.item
[1] << e
->shift_r
;
2390 mask
|= (bitmask
- 1) << e
->shift_r
;
2393 mutex_lock(&codec
->mutex
);
2395 change
= snd_soc_test_bits(widget
->codec
, e
->reg
, mask
, val
);
2397 for (wi
= 0; wi
< wlist
->num_widgets
; wi
++) {
2398 widget
= wlist
->widgets
[wi
];
2400 widget
->value
= val
;
2402 update
.kcontrol
= kcontrol
;
2403 update
.widget
= widget
;
2404 update
.reg
= e
->reg
;
2407 widget
->dapm
->update
= &update
;
2409 dapm_mux_update_power(widget
, kcontrol
, change
, mux
, e
);
2411 widget
->dapm
->update
= NULL
;
2415 mutex_unlock(&codec
->mutex
);
2418 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double
);
2421 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
2422 * @kcontrol: mixer control
2423 * @ucontrol: control element information
2425 * Returns 0 for success.
2427 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol
*kcontrol
,
2428 struct snd_ctl_elem_value
*ucontrol
)
2430 struct snd_soc_dapm_widget_list
*wlist
= snd_kcontrol_chip(kcontrol
);
2431 struct snd_soc_dapm_widget
*widget
= wlist
->widgets
[0];
2433 ucontrol
->value
.enumerated
.item
[0] = widget
->value
;
2437 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt
);
2440 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
2441 * @kcontrol: mixer control
2442 * @ucontrol: control element information
2444 * Returns 0 for success.
2446 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol
*kcontrol
,
2447 struct snd_ctl_elem_value
*ucontrol
)
2449 struct snd_soc_dapm_widget_list
*wlist
= snd_kcontrol_chip(kcontrol
);
2450 struct snd_soc_dapm_widget
*widget
= wlist
->widgets
[0];
2451 struct snd_soc_codec
*codec
= widget
->codec
;
2452 struct soc_enum
*e
=
2453 (struct soc_enum
*)kcontrol
->private_value
;
2458 if (ucontrol
->value
.enumerated
.item
[0] >= e
->max
)
2461 mutex_lock(&codec
->mutex
);
2463 change
= widget
->value
!= ucontrol
->value
.enumerated
.item
[0];
2465 for (wi
= 0; wi
< wlist
->num_widgets
; wi
++) {
2466 widget
= wlist
->widgets
[wi
];
2468 widget
->value
= ucontrol
->value
.enumerated
.item
[0];
2470 dapm_mux_update_power(widget
, kcontrol
, change
,
2475 mutex_unlock(&codec
->mutex
);
2478 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt
);
2481 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
2483 * @kcontrol: mixer control
2484 * @ucontrol: control element information
2486 * Callback to get the value of a dapm semi enumerated double mixer control.
2488 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2489 * used for handling bitfield coded enumeration for example.
2491 * Returns 0 for success.
2493 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol
*kcontrol
,
2494 struct snd_ctl_elem_value
*ucontrol
)
2496 struct snd_soc_dapm_widget_list
*wlist
= snd_kcontrol_chip(kcontrol
);
2497 struct snd_soc_dapm_widget
*widget
= wlist
->widgets
[0];
2498 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
2499 unsigned int reg_val
, val
, mux
;
2501 reg_val
= snd_soc_read(widget
->codec
, e
->reg
);
2502 val
= (reg_val
>> e
->shift_l
) & e
->mask
;
2503 for (mux
= 0; mux
< e
->max
; mux
++) {
2504 if (val
== e
->values
[mux
])
2507 ucontrol
->value
.enumerated
.item
[0] = mux
;
2508 if (e
->shift_l
!= e
->shift_r
) {
2509 val
= (reg_val
>> e
->shift_r
) & e
->mask
;
2510 for (mux
= 0; mux
< e
->max
; mux
++) {
2511 if (val
== e
->values
[mux
])
2514 ucontrol
->value
.enumerated
.item
[1] = mux
;
2519 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double
);
2522 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
2524 * @kcontrol: mixer control
2525 * @ucontrol: control element information
2527 * Callback to set the value of a dapm semi enumerated double mixer control.
2529 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2530 * used for handling bitfield coded enumeration for example.
2532 * Returns 0 for success.
2534 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol
*kcontrol
,
2535 struct snd_ctl_elem_value
*ucontrol
)
2537 struct snd_soc_dapm_widget_list
*wlist
= snd_kcontrol_chip(kcontrol
);
2538 struct snd_soc_dapm_widget
*widget
= wlist
->widgets
[0];
2539 struct snd_soc_codec
*codec
= widget
->codec
;
2540 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
2541 unsigned int val
, mux
, change
;
2543 struct snd_soc_dapm_update update
;
2546 if (ucontrol
->value
.enumerated
.item
[0] > e
->max
- 1)
2548 mux
= ucontrol
->value
.enumerated
.item
[0];
2549 val
= e
->values
[ucontrol
->value
.enumerated
.item
[0]] << e
->shift_l
;
2550 mask
= e
->mask
<< e
->shift_l
;
2551 if (e
->shift_l
!= e
->shift_r
) {
2552 if (ucontrol
->value
.enumerated
.item
[1] > e
->max
- 1)
2554 val
|= e
->values
[ucontrol
->value
.enumerated
.item
[1]] << e
->shift_r
;
2555 mask
|= e
->mask
<< e
->shift_r
;
2558 mutex_lock(&codec
->mutex
);
2560 change
= snd_soc_test_bits(widget
->codec
, e
->reg
, mask
, val
);
2562 for (wi
= 0; wi
< wlist
->num_widgets
; wi
++) {
2563 widget
= wlist
->widgets
[wi
];
2565 widget
->value
= val
;
2567 update
.kcontrol
= kcontrol
;
2568 update
.widget
= widget
;
2569 update
.reg
= e
->reg
;
2572 widget
->dapm
->update
= &update
;
2574 dapm_mux_update_power(widget
, kcontrol
, change
, mux
, e
);
2576 widget
->dapm
->update
= NULL
;
2580 mutex_unlock(&codec
->mutex
);
2583 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double
);
2586 * snd_soc_dapm_info_pin_switch - Info for a pin switch
2588 * @kcontrol: mixer control
2589 * @uinfo: control element information
2591 * Callback to provide information about a pin switch control.
2593 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol
*kcontrol
,
2594 struct snd_ctl_elem_info
*uinfo
)
2596 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_BOOLEAN
;
2598 uinfo
->value
.integer
.min
= 0;
2599 uinfo
->value
.integer
.max
= 1;
2603 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch
);
2606 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
2608 * @kcontrol: mixer control
2611 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol
*kcontrol
,
2612 struct snd_ctl_elem_value
*ucontrol
)
2614 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
2615 const char *pin
= (const char *)kcontrol
->private_value
;
2617 mutex_lock(&codec
->mutex
);
2619 ucontrol
->value
.integer
.value
[0] =
2620 snd_soc_dapm_get_pin_status(&codec
->dapm
, pin
);
2622 mutex_unlock(&codec
->mutex
);
2626 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch
);
2629 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
2631 * @kcontrol: mixer control
2634 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol
*kcontrol
,
2635 struct snd_ctl_elem_value
*ucontrol
)
2637 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
2638 const char *pin
= (const char *)kcontrol
->private_value
;
2640 mutex_lock(&codec
->mutex
);
2642 if (ucontrol
->value
.integer
.value
[0])
2643 snd_soc_dapm_enable_pin(&codec
->dapm
, pin
);
2645 snd_soc_dapm_disable_pin(&codec
->dapm
, pin
);
2647 snd_soc_dapm_sync(&codec
->dapm
);
2649 mutex_unlock(&codec
->mutex
);
2653 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch
);
2656 * snd_soc_dapm_new_control - create new dapm control
2657 * @dapm: DAPM context
2658 * @widget: widget template
2660 * Creates a new dapm control based upon the template.
2662 * Returns 0 for success else error.
2664 int snd_soc_dapm_new_control(struct snd_soc_dapm_context
*dapm
,
2665 const struct snd_soc_dapm_widget
*widget
)
2667 struct snd_soc_dapm_widget
*w
;
2670 if ((w
= dapm_cnew_widget(widget
)) == NULL
)
2673 name_len
= strlen(widget
->name
) + 1;
2674 if (dapm
->codec
&& dapm
->codec
->name_prefix
)
2675 name_len
+= 1 + strlen(dapm
->codec
->name_prefix
);
2676 w
->name
= kmalloc(name_len
, GFP_KERNEL
);
2677 if (w
->name
== NULL
) {
2681 if (dapm
->codec
&& dapm
->codec
->name_prefix
)
2682 snprintf(w
->name
, name_len
, "%s %s",
2683 dapm
->codec
->name_prefix
, widget
->name
);
2685 snprintf(w
->name
, name_len
, "%s", widget
->name
);
2688 case snd_soc_dapm_switch
:
2689 case snd_soc_dapm_mixer
:
2690 case snd_soc_dapm_mixer_named_ctl
:
2691 w
->power_check
= dapm_generic_check_power
;
2693 case snd_soc_dapm_mux
:
2694 case snd_soc_dapm_virt_mux
:
2695 case snd_soc_dapm_value_mux
:
2696 w
->power_check
= dapm_generic_check_power
;
2698 case snd_soc_dapm_adc
:
2699 case snd_soc_dapm_aif_out
:
2700 w
->power_check
= dapm_adc_check_power
;
2702 case snd_soc_dapm_dac
:
2703 case snd_soc_dapm_aif_in
:
2704 w
->power_check
= dapm_dac_check_power
;
2706 case snd_soc_dapm_pga
:
2707 case snd_soc_dapm_out_drv
:
2708 case snd_soc_dapm_input
:
2709 case snd_soc_dapm_output
:
2710 case snd_soc_dapm_micbias
:
2711 case snd_soc_dapm_spk
:
2712 case snd_soc_dapm_hp
:
2713 case snd_soc_dapm_mic
:
2714 case snd_soc_dapm_line
:
2715 w
->power_check
= dapm_generic_check_power
;
2717 case snd_soc_dapm_supply
:
2718 w
->power_check
= dapm_supply_check_power
;
2721 w
->power_check
= dapm_always_on_check_power
;
2727 w
->codec
= dapm
->codec
;
2728 w
->platform
= dapm
->platform
;
2729 INIT_LIST_HEAD(&w
->sources
);
2730 INIT_LIST_HEAD(&w
->sinks
);
2731 INIT_LIST_HEAD(&w
->list
);
2732 INIT_LIST_HEAD(&w
->dirty
);
2733 list_add(&w
->list
, &dapm
->card
->widgets
);
2735 /* machine layer set ups unconnected pins and insertions */
2739 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control
);
2742 * snd_soc_dapm_new_controls - create new dapm controls
2743 * @dapm: DAPM context
2744 * @widget: widget array
2745 * @num: number of widgets
2747 * Creates new DAPM controls based upon the templates.
2749 * Returns 0 for success else error.
2751 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context
*dapm
,
2752 const struct snd_soc_dapm_widget
*widget
,
2757 for (i
= 0; i
< num
; i
++) {
2758 ret
= snd_soc_dapm_new_control(dapm
, widget
);
2761 "ASoC: Failed to create DAPM control %s: %d\n",
2769 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls
);
2771 static void soc_dapm_stream_event(struct snd_soc_dapm_context
*dapm
,
2772 const char *stream
, int event
)
2774 struct snd_soc_dapm_widget
*w
;
2776 list_for_each_entry(w
, &dapm
->card
->widgets
, list
)
2778 if (!w
->sname
|| w
->dapm
!= dapm
)
2780 dev_vdbg(w
->dapm
->dev
, "widget %s\n %s stream %s event %d\n",
2781 w
->name
, w
->sname
, stream
, event
);
2782 if (strstr(w
->sname
, stream
)) {
2783 dapm_mark_dirty(w
, "stream event");
2785 case SND_SOC_DAPM_STREAM_START
:
2788 case SND_SOC_DAPM_STREAM_STOP
:
2791 case SND_SOC_DAPM_STREAM_SUSPEND
:
2792 case SND_SOC_DAPM_STREAM_RESUME
:
2793 case SND_SOC_DAPM_STREAM_PAUSE_PUSH
:
2794 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE
:
2800 dapm_power_widgets(dapm
, event
);
2802 /* do we need to notify any clients that DAPM stream is complete */
2803 if (dapm
->stream_event
)
2804 dapm
->stream_event(dapm
, event
);
2808 * snd_soc_dapm_stream_event - send a stream event to the dapm core
2809 * @rtd: PCM runtime data
2810 * @stream: stream name
2811 * @event: stream event
2813 * Sends a stream event to the dapm core. The core then makes any
2814 * necessary widget power changes.
2816 * Returns 0 for success else error.
2818 int snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime
*rtd
,
2819 const char *stream
, int event
)
2821 struct snd_soc_codec
*codec
= rtd
->codec
;
2826 mutex_lock(&codec
->mutex
);
2827 soc_dapm_stream_event(&codec
->dapm
, stream
, event
);
2828 mutex_unlock(&codec
->mutex
);
2833 * snd_soc_dapm_enable_pin - enable pin.
2834 * @dapm: DAPM context
2837 * Enables input/output pin and its parents or children widgets iff there is
2838 * a valid audio route and active audio stream.
2839 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2840 * do any widget power switching.
2842 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context
*dapm
, const char *pin
)
2844 return snd_soc_dapm_set_pin(dapm
, pin
, 1);
2846 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin
);
2849 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
2850 * @dapm: DAPM context
2853 * Enables input/output pin regardless of any other state. This is
2854 * intended for use with microphone bias supplies used in microphone
2857 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2858 * do any widget power switching.
2860 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context
*dapm
,
2863 struct snd_soc_dapm_widget
*w
= dapm_find_widget(dapm
, pin
, true);
2866 dev_err(dapm
->dev
, "dapm: unknown pin %s\n", pin
);
2870 dev_dbg(w
->dapm
->dev
, "dapm: force enable pin %s\n", pin
);
2873 dapm_mark_dirty(w
, "force enable");
2877 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin
);
2880 * snd_soc_dapm_disable_pin - disable pin.
2881 * @dapm: DAPM context
2884 * Disables input/output pin and its parents or children widgets.
2885 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2886 * do any widget power switching.
2888 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context
*dapm
,
2891 return snd_soc_dapm_set_pin(dapm
, pin
, 0);
2893 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin
);
2896 * snd_soc_dapm_nc_pin - permanently disable pin.
2897 * @dapm: DAPM context
2900 * Marks the specified pin as being not connected, disabling it along
2901 * any parent or child widgets. At present this is identical to
2902 * snd_soc_dapm_disable_pin() but in future it will be extended to do
2903 * additional things such as disabling controls which only affect
2904 * paths through the pin.
2906 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2907 * do any widget power switching.
2909 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context
*dapm
, const char *pin
)
2911 return snd_soc_dapm_set_pin(dapm
, pin
, 0);
2913 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin
);
2916 * snd_soc_dapm_get_pin_status - get audio pin status
2917 * @dapm: DAPM context
2918 * @pin: audio signal pin endpoint (or start point)
2920 * Get audio pin status - connected or disconnected.
2922 * Returns 1 for connected otherwise 0.
2924 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context
*dapm
,
2927 struct snd_soc_dapm_widget
*w
= dapm_find_widget(dapm
, pin
, true);
2930 return w
->connected
;
2934 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status
);
2937 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
2938 * @dapm: DAPM context
2939 * @pin: audio signal pin endpoint (or start point)
2941 * Mark the given endpoint or pin as ignoring suspend. When the
2942 * system is disabled a path between two endpoints flagged as ignoring
2943 * suspend will not be disabled. The path must already be enabled via
2944 * normal means at suspend time, it will not be turned on if it was not
2947 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context
*dapm
,
2950 struct snd_soc_dapm_widget
*w
= dapm_find_widget(dapm
, pin
, false);
2953 dev_err(dapm
->dev
, "dapm: unknown pin %s\n", pin
);
2957 w
->ignore_suspend
= 1;
2961 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend
);
2963 static bool snd_soc_dapm_widget_in_card_paths(struct snd_soc_card
*card
,
2964 struct snd_soc_dapm_widget
*w
)
2966 struct snd_soc_dapm_path
*p
;
2968 list_for_each_entry(p
, &card
->paths
, list
) {
2969 if ((p
->source
== w
) || (p
->sink
== w
)) {
2971 "... Path %s(id:%d dapm:%p) - %s(id:%d dapm:%p)\n",
2972 p
->source
->name
, p
->source
->id
, p
->source
->dapm
,
2973 p
->sink
->name
, p
->sink
->id
, p
->sink
->dapm
);
2975 /* Connected to something other than the codec */
2976 if (p
->source
->dapm
!= p
->sink
->dapm
)
2979 * Loopback connection from codec external pin to
2980 * codec external pin
2982 if (p
->sink
->id
== snd_soc_dapm_input
) {
2983 switch (p
->source
->id
) {
2984 case snd_soc_dapm_output
:
2985 case snd_soc_dapm_micbias
:
2998 * snd_soc_dapm_auto_nc_codec_pins - call snd_soc_dapm_nc_pin for unused pins
2999 * @codec: The codec whose pins should be processed
3001 * Automatically call snd_soc_dapm_nc_pin() for any external pins in the codec
3002 * which are unused. Pins are used if they are connected externally to the
3003 * codec, whether that be to some other device, or a loop-back connection to
3006 void snd_soc_dapm_auto_nc_codec_pins(struct snd_soc_codec
*codec
)
3008 struct snd_soc_card
*card
= codec
->card
;
3009 struct snd_soc_dapm_context
*dapm
= &codec
->dapm
;
3010 struct snd_soc_dapm_widget
*w
;
3012 dev_dbg(codec
->dev
, "Auto NC: DAPMs: card:%p codec:%p\n",
3013 &card
->dapm
, &codec
->dapm
);
3015 list_for_each_entry(w
, &card
->widgets
, list
) {
3016 if (w
->dapm
!= dapm
)
3019 case snd_soc_dapm_input
:
3020 case snd_soc_dapm_output
:
3021 case snd_soc_dapm_micbias
:
3022 dev_dbg(codec
->dev
, "Auto NC: Checking widget %s\n",
3024 if (!snd_soc_dapm_widget_in_card_paths(card
, w
)) {
3026 "... Not in map; disabling\n");
3027 snd_soc_dapm_nc_pin(dapm
, w
->name
);
3037 * snd_soc_dapm_free - free dapm resources
3038 * @dapm: DAPM context
3040 * Free all dapm widgets and resources.
3042 void snd_soc_dapm_free(struct snd_soc_dapm_context
*dapm
)
3044 snd_soc_dapm_sys_remove(dapm
->dev
);
3045 dapm_debugfs_cleanup(dapm
);
3046 dapm_free_widgets(dapm
);
3047 list_del(&dapm
->list
);
3049 EXPORT_SYMBOL_GPL(snd_soc_dapm_free
);
3051 static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context
*dapm
)
3053 struct snd_soc_dapm_widget
*w
;
3054 LIST_HEAD(down_list
);
3057 list_for_each_entry(w
, &dapm
->card
->widgets
, list
) {
3058 if (w
->dapm
!= dapm
)
3061 dapm_seq_insert(w
, &down_list
, false);
3067 /* If there were no widgets to power down we're already in
3071 if (dapm
->bias_level
== SND_SOC_BIAS_ON
)
3072 snd_soc_dapm_set_bias_level(dapm
,
3073 SND_SOC_BIAS_PREPARE
);
3074 dapm_seq_run(dapm
, &down_list
, 0, false);
3075 if (dapm
->bias_level
== SND_SOC_BIAS_PREPARE
)
3076 snd_soc_dapm_set_bias_level(dapm
,
3077 SND_SOC_BIAS_STANDBY
);
3082 * snd_soc_dapm_shutdown - callback for system shutdown
3084 void snd_soc_dapm_shutdown(struct snd_soc_card
*card
)
3086 struct snd_soc_codec
*codec
;
3088 list_for_each_entry(codec
, &card
->codec_dev_list
, list
) {
3089 soc_dapm_shutdown_codec(&codec
->dapm
);
3090 if (codec
->dapm
.bias_level
== SND_SOC_BIAS_STANDBY
)
3091 snd_soc_dapm_set_bias_level(&codec
->dapm
,
3096 /* Module information */
3097 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3098 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
3099 MODULE_LICENSE("GPL");