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/slab.h>
43 #include <sound/core.h>
44 #include <sound/pcm.h>
45 #include <sound/pcm_params.h>
46 #include <sound/soc.h>
47 #include <sound/initval.h>
49 #include <trace/events/asoc.h>
51 /* dapm power sequences - make this per codec in the future */
52 static int dapm_up_seq
[] = {
53 [snd_soc_dapm_pre
] = 0,
54 [snd_soc_dapm_supply
] = 1,
55 [snd_soc_dapm_micbias
] = 2,
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_supply
] = 11,
91 [snd_soc_dapm_post
] = 12,
94 static void pop_wait(u32 pop_time
)
97 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time
));
100 static void pop_dbg(struct device
*dev
, u32 pop_time
, const char *fmt
, ...)
108 buf
= kmalloc(PAGE_SIZE
, GFP_KERNEL
);
113 vsnprintf(buf
, PAGE_SIZE
, fmt
, args
);
114 dev_info(dev
, "%s", buf
);
120 /* create a new dapm widget */
121 static inline struct snd_soc_dapm_widget
*dapm_cnew_widget(
122 const struct snd_soc_dapm_widget
*_widget
)
124 return kmemdup(_widget
, sizeof(*_widget
), GFP_KERNEL
);
127 static int soc_widget_read(struct snd_soc_dapm_widget
*w
, int reg
)
130 return snd_soc_read(w
->codec
, reg
);
134 static int soc_widget_write(struct snd_soc_dapm_widget
*w
, int reg
, int val
)
137 return snd_soc_write(w
->codec
, reg
, val
);
141 static int soc_widget_update_bits(struct snd_soc_dapm_widget
*w
,
142 unsigned short reg
, unsigned int mask
, unsigned int value
)
145 unsigned int old
, new;
148 ret
= soc_widget_read(w
, reg
);
153 new = (old
& ~mask
) | (value
& mask
);
156 ret
= soc_widget_write(w
, reg
, new);
165 * snd_soc_dapm_set_bias_level - set the bias level for the system
166 * @dapm: DAPM context
167 * @level: level to configure
169 * Configure the bias (power) levels for the SoC audio device.
171 * Returns 0 for success else error.
173 static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context
*dapm
,
174 enum snd_soc_bias_level level
)
176 struct snd_soc_card
*card
= dapm
->card
;
179 trace_snd_soc_bias_level_start(card
, level
);
181 if (card
&& card
->set_bias_level
)
182 ret
= card
->set_bias_level(card
, dapm
, level
);
187 if (dapm
->codec
->driver
->set_bias_level
)
188 ret
= dapm
->codec
->driver
->set_bias_level(dapm
->codec
,
191 dapm
->bias_level
= level
;
196 if (card
&& card
->set_bias_level_post
)
197 ret
= card
->set_bias_level_post(card
, dapm
, level
);
199 trace_snd_soc_bias_level_done(card
, level
);
204 /* set up initial codec paths */
205 static void dapm_set_path_status(struct snd_soc_dapm_widget
*w
,
206 struct snd_soc_dapm_path
*p
, int i
)
209 case snd_soc_dapm_switch
:
210 case snd_soc_dapm_mixer
:
211 case snd_soc_dapm_mixer_named_ctl
: {
213 struct soc_mixer_control
*mc
= (struct soc_mixer_control
*)
214 w
->kcontrol_news
[i
].private_value
;
215 unsigned int reg
= mc
->reg
;
216 unsigned int shift
= mc
->shift
;
218 unsigned int mask
= (1 << fls(max
)) - 1;
219 unsigned int invert
= mc
->invert
;
221 val
= soc_widget_read(w
, reg
);
222 val
= (val
>> shift
) & mask
;
224 if ((invert
&& !val
) || (!invert
&& val
))
230 case snd_soc_dapm_mux
: {
231 struct soc_enum
*e
= (struct soc_enum
*)
232 w
->kcontrol_news
[i
].private_value
;
233 int val
, item
, bitmask
;
235 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
237 val
= soc_widget_read(w
, e
->reg
);
238 item
= (val
>> e
->shift_l
) & (bitmask
- 1);
241 for (i
= 0; i
< e
->max
; i
++) {
242 if (!(strcmp(p
->name
, e
->texts
[i
])) && item
== i
)
247 case snd_soc_dapm_virt_mux
: {
248 struct soc_enum
*e
= (struct soc_enum
*)
249 w
->kcontrol_news
[i
].private_value
;
252 /* since a virtual mux has no backing registers to
253 * decide which path to connect, it will try to match
254 * with the first enumeration. This is to ensure
255 * that the default mux choice (the first) will be
256 * correctly powered up during initialization.
258 if (!strcmp(p
->name
, e
->texts
[0]))
262 case snd_soc_dapm_value_mux
: {
263 struct soc_enum
*e
= (struct soc_enum
*)
264 w
->kcontrol_news
[i
].private_value
;
267 val
= soc_widget_read(w
, e
->reg
);
268 val
= (val
>> e
->shift_l
) & e
->mask
;
269 for (item
= 0; item
< e
->max
; item
++) {
270 if (val
== e
->values
[item
])
275 for (i
= 0; i
< e
->max
; i
++) {
276 if (!(strcmp(p
->name
, e
->texts
[i
])) && item
== i
)
281 /* does not effect routing - always connected */
282 case snd_soc_dapm_pga
:
283 case snd_soc_dapm_out_drv
:
284 case snd_soc_dapm_output
:
285 case snd_soc_dapm_adc
:
286 case snd_soc_dapm_input
:
287 case snd_soc_dapm_dac
:
288 case snd_soc_dapm_micbias
:
289 case snd_soc_dapm_vmid
:
290 case snd_soc_dapm_supply
:
291 case snd_soc_dapm_aif_in
:
292 case snd_soc_dapm_aif_out
:
295 /* does effect routing - dynamically connected */
296 case snd_soc_dapm_hp
:
297 case snd_soc_dapm_mic
:
298 case snd_soc_dapm_spk
:
299 case snd_soc_dapm_line
:
300 case snd_soc_dapm_pre
:
301 case snd_soc_dapm_post
:
307 /* connect mux widget to its interconnecting audio paths */
308 static int dapm_connect_mux(struct snd_soc_dapm_context
*dapm
,
309 struct snd_soc_dapm_widget
*src
, struct snd_soc_dapm_widget
*dest
,
310 struct snd_soc_dapm_path
*path
, const char *control_name
,
311 const struct snd_kcontrol_new
*kcontrol
)
313 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
316 for (i
= 0; i
< e
->max
; i
++) {
317 if (!(strcmp(control_name
, e
->texts
[i
]))) {
318 list_add(&path
->list
, &dapm
->card
->paths
);
319 list_add(&path
->list_sink
, &dest
->sources
);
320 list_add(&path
->list_source
, &src
->sinks
);
321 path
->name
= (char*)e
->texts
[i
];
322 dapm_set_path_status(dest
, path
, 0);
330 /* connect mixer widget to its interconnecting audio paths */
331 static int dapm_connect_mixer(struct snd_soc_dapm_context
*dapm
,
332 struct snd_soc_dapm_widget
*src
, struct snd_soc_dapm_widget
*dest
,
333 struct snd_soc_dapm_path
*path
, const char *control_name
)
337 /* search for mixer kcontrol */
338 for (i
= 0; i
< dest
->num_kcontrols
; i
++) {
339 if (!strcmp(control_name
, dest
->kcontrol_news
[i
].name
)) {
340 list_add(&path
->list
, &dapm
->card
->paths
);
341 list_add(&path
->list_sink
, &dest
->sources
);
342 list_add(&path
->list_source
, &src
->sinks
);
343 path
->name
= dest
->kcontrol_news
[i
].name
;
344 dapm_set_path_status(dest
, path
, i
);
351 static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context
*dapm
,
352 struct snd_soc_dapm_widget
*kcontrolw
,
353 const struct snd_kcontrol_new
*kcontrol_new
,
354 struct snd_kcontrol
**kcontrol
)
356 struct snd_soc_dapm_widget
*w
;
361 list_for_each_entry(w
, &dapm
->card
->widgets
, list
) {
362 if (w
== kcontrolw
|| w
->dapm
!= kcontrolw
->dapm
)
364 for (i
= 0; i
< w
->num_kcontrols
; i
++) {
365 if (&w
->kcontrol_news
[i
] == kcontrol_new
) {
367 *kcontrol
= w
->kcontrols
[i
];
376 /* create new dapm mixer control */
377 static int dapm_new_mixer(struct snd_soc_dapm_widget
*w
)
379 struct snd_soc_dapm_context
*dapm
= w
->dapm
;
381 size_t name_len
, prefix_len
;
382 struct snd_soc_dapm_path
*path
;
383 struct snd_card
*card
= dapm
->card
->snd_card
;
385 struct snd_soc_dapm_widget_list
*wlist
;
389 prefix
= dapm
->codec
->name_prefix
;
394 prefix_len
= strlen(prefix
) + 1;
399 for (i
= 0; i
< w
->num_kcontrols
; i
++) {
402 list_for_each_entry(path
, &w
->sources
, list_sink
) {
404 /* mixer/mux paths name must match control name */
405 if (path
->name
!= (char *)w
->kcontrol_news
[i
].name
)
408 wlistsize
= sizeof(struct snd_soc_dapm_widget_list
) +
409 sizeof(struct snd_soc_dapm_widget
*),
410 wlist
= kzalloc(wlistsize
, GFP_KERNEL
);
413 "asoc: can't allocate widget list for %s\n",
417 wlist
->num_widgets
= 1;
418 wlist
->widgets
[0] = w
;
420 /* add dapm control with long name.
421 * for dapm_mixer this is the concatenation of the
422 * mixer and kcontrol name.
423 * for dapm_mixer_named_ctl this is simply the
426 name_len
= strlen(w
->kcontrol_news
[i
].name
) + 1;
427 if (w
->id
!= snd_soc_dapm_mixer_named_ctl
)
428 name_len
+= 1 + strlen(w
->name
);
430 path
->long_name
= kmalloc(name_len
, GFP_KERNEL
);
432 if (path
->long_name
== NULL
) {
439 /* The control will get a prefix from
440 * the control creation process but
441 * we're also using the same prefix
442 * for widgets so cut the prefix off
443 * the front of the widget name.
445 snprintf(path
->long_name
, name_len
, "%s %s",
446 w
->name
+ prefix_len
,
447 w
->kcontrol_news
[i
].name
);
449 case snd_soc_dapm_mixer_named_ctl
:
450 snprintf(path
->long_name
, name_len
, "%s",
451 w
->kcontrol_news
[i
].name
);
455 path
->long_name
[name_len
- 1] = '\0';
457 path
->kcontrol
= snd_soc_cnew(&w
->kcontrol_news
[i
],
458 wlist
, path
->long_name
,
460 ret
= snd_ctl_add(card
, path
->kcontrol
);
463 "asoc: failed to add dapm kcontrol %s: %d\n",
464 path
->long_name
, ret
);
466 kfree(path
->long_name
);
467 path
->long_name
= NULL
;
470 w
->kcontrols
[i
] = path
->kcontrol
;
476 /* create new dapm mux control */
477 static int dapm_new_mux(struct snd_soc_dapm_widget
*w
)
479 struct snd_soc_dapm_context
*dapm
= w
->dapm
;
480 struct snd_soc_dapm_path
*path
= NULL
;
481 struct snd_kcontrol
*kcontrol
;
482 struct snd_card
*card
= dapm
->card
->snd_card
;
486 struct snd_soc_dapm_widget_list
*wlist
;
487 int shared
, wlistentries
;
491 if (w
->num_kcontrols
!= 1) {
493 "asoc: mux %s has incorrect number of controls\n",
498 shared
= dapm_is_shared_kcontrol(dapm
, w
, &w
->kcontrol_news
[0],
501 wlist
= kcontrol
->private_data
;
502 wlistentries
= wlist
->num_widgets
+ 1;
507 wlistsize
= sizeof(struct snd_soc_dapm_widget_list
) +
508 wlistentries
* sizeof(struct snd_soc_dapm_widget
*),
509 wlist
= krealloc(wlist
, wlistsize
, GFP_KERNEL
);
512 "asoc: can't allocate widget list for %s\n", w
->name
);
515 wlist
->num_widgets
= wlistentries
;
516 wlist
->widgets
[wlistentries
- 1] = w
;
520 prefix
= dapm
->codec
->name_prefix
;
525 name
= w
->kcontrol_news
[0].name
;
530 prefix_len
= strlen(prefix
) + 1;
536 * The control will get a prefix from the control creation
537 * process but we're also using the same prefix for widgets so
538 * cut the prefix off the front of the widget name.
540 kcontrol
= snd_soc_cnew(&w
->kcontrol_news
[0], wlist
,
541 name
+ prefix_len
, prefix
);
542 ret
= snd_ctl_add(card
, kcontrol
);
545 "asoc: failed to add kcontrol %s\n", w
->name
);
551 kcontrol
->private_data
= wlist
;
553 w
->kcontrols
[0] = kcontrol
;
555 list_for_each_entry(path
, &w
->sources
, list_sink
)
556 path
->kcontrol
= kcontrol
;
561 /* create new dapm volume control */
562 static int dapm_new_pga(struct snd_soc_dapm_widget
*w
)
564 if (w
->num_kcontrols
)
565 dev_err(w
->dapm
->dev
,
566 "asoc: PGA controls not supported: '%s'\n", w
->name
);
571 /* reset 'walked' bit for each dapm path */
572 static inline void dapm_clear_walk(struct snd_soc_dapm_context
*dapm
)
574 struct snd_soc_dapm_path
*p
;
576 list_for_each_entry(p
, &dapm
->card
->paths
, list
)
580 /* We implement power down on suspend by checking the power state of
581 * the ALSA card - when we are suspending the ALSA state for the card
584 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget
*widget
)
586 int level
= snd_power_get_state(widget
->dapm
->card
->snd_card
);
589 case SNDRV_CTL_POWER_D3hot
:
590 case SNDRV_CTL_POWER_D3cold
:
591 if (widget
->ignore_suspend
)
592 dev_dbg(widget
->dapm
->dev
, "%s ignoring suspend\n",
594 return widget
->ignore_suspend
;
601 * Recursively check for a completed path to an active or physically connected
602 * output widget. Returns number of complete paths.
604 static int is_connected_output_ep(struct snd_soc_dapm_widget
*widget
)
606 struct snd_soc_dapm_path
*path
;
609 if (widget
->id
== snd_soc_dapm_supply
)
612 switch (widget
->id
) {
613 case snd_soc_dapm_adc
:
614 case snd_soc_dapm_aif_out
:
616 return snd_soc_dapm_suspend_check(widget
);
621 if (widget
->connected
) {
622 /* connected pin ? */
623 if (widget
->id
== snd_soc_dapm_output
&& !widget
->ext
)
624 return snd_soc_dapm_suspend_check(widget
);
626 /* connected jack or spk ? */
627 if (widget
->id
== snd_soc_dapm_hp
|| widget
->id
== snd_soc_dapm_spk
||
628 (widget
->id
== snd_soc_dapm_line
&& !list_empty(&widget
->sources
)))
629 return snd_soc_dapm_suspend_check(widget
);
632 list_for_each_entry(path
, &widget
->sinks
, list_source
) {
639 if (path
->sink
&& path
->connect
) {
641 con
+= is_connected_output_ep(path
->sink
);
649 * Recursively check for a completed path to an active or physically connected
650 * input widget. Returns number of complete paths.
652 static int is_connected_input_ep(struct snd_soc_dapm_widget
*widget
)
654 struct snd_soc_dapm_path
*path
;
657 if (widget
->id
== snd_soc_dapm_supply
)
660 /* active stream ? */
661 switch (widget
->id
) {
662 case snd_soc_dapm_dac
:
663 case snd_soc_dapm_aif_in
:
665 return snd_soc_dapm_suspend_check(widget
);
670 if (widget
->connected
) {
671 /* connected pin ? */
672 if (widget
->id
== snd_soc_dapm_input
&& !widget
->ext
)
673 return snd_soc_dapm_suspend_check(widget
);
675 /* connected VMID/Bias for lower pops */
676 if (widget
->id
== snd_soc_dapm_vmid
)
677 return snd_soc_dapm_suspend_check(widget
);
679 /* connected jack ? */
680 if (widget
->id
== snd_soc_dapm_mic
||
681 (widget
->id
== snd_soc_dapm_line
&& !list_empty(&widget
->sinks
)))
682 return snd_soc_dapm_suspend_check(widget
);
685 list_for_each_entry(path
, &widget
->sources
, list_sink
) {
692 if (path
->source
&& path
->connect
) {
694 con
+= is_connected_input_ep(path
->source
);
702 * Handler for generic register modifier widget.
704 int dapm_reg_event(struct snd_soc_dapm_widget
*w
,
705 struct snd_kcontrol
*kcontrol
, int event
)
709 if (SND_SOC_DAPM_EVENT_ON(event
))
714 soc_widget_update_bits(w
, -(w
->reg
+ 1),
715 w
->mask
<< w
->shift
, val
<< w
->shift
);
719 EXPORT_SYMBOL_GPL(dapm_reg_event
);
721 /* Generic check to see if a widget should be powered.
723 static int dapm_generic_check_power(struct snd_soc_dapm_widget
*w
)
727 in
= is_connected_input_ep(w
);
728 dapm_clear_walk(w
->dapm
);
729 out
= is_connected_output_ep(w
);
730 dapm_clear_walk(w
->dapm
);
731 return out
!= 0 && in
!= 0;
734 /* Check to see if an ADC has power */
735 static int dapm_adc_check_power(struct snd_soc_dapm_widget
*w
)
740 in
= is_connected_input_ep(w
);
741 dapm_clear_walk(w
->dapm
);
744 return dapm_generic_check_power(w
);
748 /* Check to see if a DAC has power */
749 static int dapm_dac_check_power(struct snd_soc_dapm_widget
*w
)
754 out
= is_connected_output_ep(w
);
755 dapm_clear_walk(w
->dapm
);
758 return dapm_generic_check_power(w
);
762 /* Check to see if a power supply is needed */
763 static int dapm_supply_check_power(struct snd_soc_dapm_widget
*w
)
765 struct snd_soc_dapm_path
*path
;
768 /* Check if one of our outputs is connected */
769 list_for_each_entry(path
, &w
->sinks
, list_source
) {
773 if (path
->connected
&&
774 !path
->connected(path
->source
, path
->sink
))
780 if (path
->sink
->force
) {
785 if (path
->sink
->power_check
&&
786 path
->sink
->power_check(path
->sink
)) {
792 dapm_clear_walk(w
->dapm
);
797 static int dapm_seq_compare(struct snd_soc_dapm_widget
*a
,
798 struct snd_soc_dapm_widget
*b
,
806 sort
= dapm_down_seq
;
808 if (sort
[a
->id
] != sort
[b
->id
])
809 return sort
[a
->id
] - sort
[b
->id
];
810 if (a
->subseq
!= b
->subseq
) {
812 return a
->subseq
- b
->subseq
;
814 return b
->subseq
- a
->subseq
;
816 if (a
->reg
!= b
->reg
)
817 return a
->reg
- b
->reg
;
818 if (a
->dapm
!= b
->dapm
)
819 return (unsigned long)a
->dapm
- (unsigned long)b
->dapm
;
824 /* Insert a widget in order into a DAPM power sequence. */
825 static void dapm_seq_insert(struct snd_soc_dapm_widget
*new_widget
,
826 struct list_head
*list
,
829 struct snd_soc_dapm_widget
*w
;
831 list_for_each_entry(w
, list
, power_list
)
832 if (dapm_seq_compare(new_widget
, w
, power_up
) < 0) {
833 list_add_tail(&new_widget
->power_list
, &w
->power_list
);
837 list_add_tail(&new_widget
->power_list
, list
);
840 static void dapm_seq_check_event(struct snd_soc_dapm_context
*dapm
,
841 struct snd_soc_dapm_widget
*w
, int event
)
843 struct snd_soc_card
*card
= dapm
->card
;
848 case SND_SOC_DAPM_PRE_PMU
:
852 case SND_SOC_DAPM_POST_PMU
:
853 ev_name
= "POST_PMU";
856 case SND_SOC_DAPM_PRE_PMD
:
860 case SND_SOC_DAPM_POST_PMD
:
861 ev_name
= "POST_PMD";
869 if (w
->power
!= power
)
872 if (w
->event
&& (w
->event_flags
& event
)) {
873 pop_dbg(dapm
->dev
, card
->pop_time
, "pop test : %s %s\n",
875 trace_snd_soc_dapm_widget_event_start(w
, event
);
876 ret
= w
->event(w
, NULL
, event
);
877 trace_snd_soc_dapm_widget_event_done(w
, event
);
879 pr_err("%s: %s event failed: %d\n",
880 ev_name
, w
->name
, ret
);
884 /* Apply the coalesced changes from a DAPM sequence */
885 static void dapm_seq_run_coalesced(struct snd_soc_dapm_context
*dapm
,
886 struct list_head
*pending
)
888 struct snd_soc_card
*card
= dapm
->card
;
889 struct snd_soc_dapm_widget
*w
;
891 unsigned int value
= 0;
892 unsigned int mask
= 0;
893 unsigned int cur_mask
;
895 reg
= list_first_entry(pending
, struct snd_soc_dapm_widget
,
898 list_for_each_entry(w
, pending
, power_list
) {
899 cur_mask
= 1 << w
->shift
;
900 BUG_ON(reg
!= w
->reg
);
911 pop_dbg(dapm
->dev
, card
->pop_time
,
912 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
913 w
->name
, reg
, value
, mask
);
915 /* Check for events */
916 dapm_seq_check_event(dapm
, w
, SND_SOC_DAPM_PRE_PMU
);
917 dapm_seq_check_event(dapm
, w
, SND_SOC_DAPM_PRE_PMD
);
921 pop_dbg(dapm
->dev
, card
->pop_time
,
922 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
923 value
, mask
, reg
, card
->pop_time
);
924 pop_wait(card
->pop_time
);
925 soc_widget_update_bits(w
, reg
, mask
, value
);
928 list_for_each_entry(w
, pending
, power_list
) {
929 dapm_seq_check_event(dapm
, w
, SND_SOC_DAPM_POST_PMU
);
930 dapm_seq_check_event(dapm
, w
, SND_SOC_DAPM_POST_PMD
);
934 /* Apply a DAPM power sequence.
936 * We walk over a pre-sorted list of widgets to apply power to. In
937 * order to minimise the number of writes to the device required
938 * multiple widgets will be updated in a single write where possible.
939 * Currently anything that requires more than a single write is not
942 static void dapm_seq_run(struct snd_soc_dapm_context
*dapm
,
943 struct list_head
*list
, int event
, bool power_up
)
945 struct snd_soc_dapm_widget
*w
, *n
;
949 int cur_reg
= SND_SOC_NOPM
;
950 struct snd_soc_dapm_context
*cur_dapm
= NULL
;
957 sort
= dapm_down_seq
;
959 list_for_each_entry_safe(w
, n
, list
, power_list
) {
962 /* Do we need to apply any queued changes? */
963 if (sort
[w
->id
] != cur_sort
|| w
->reg
!= cur_reg
||
964 w
->dapm
!= cur_dapm
|| w
->subseq
!= cur_subseq
) {
965 if (!list_empty(&pending
))
966 dapm_seq_run_coalesced(cur_dapm
, &pending
);
968 if (cur_dapm
&& cur_dapm
->seq_notifier
) {
969 for (i
= 0; i
< ARRAY_SIZE(dapm_up_seq
); i
++)
970 if (sort
[i
] == cur_sort
)
971 cur_dapm
->seq_notifier(cur_dapm
,
976 INIT_LIST_HEAD(&pending
);
979 cur_reg
= SND_SOC_NOPM
;
984 case snd_soc_dapm_pre
:
986 list_for_each_entry_safe_continue(w
, n
, list
,
989 if (event
== SND_SOC_DAPM_STREAM_START
)
991 NULL
, SND_SOC_DAPM_PRE_PMU
);
992 else if (event
== SND_SOC_DAPM_STREAM_STOP
)
994 NULL
, SND_SOC_DAPM_PRE_PMD
);
997 case snd_soc_dapm_post
:
999 list_for_each_entry_safe_continue(w
, n
, list
,
1002 if (event
== SND_SOC_DAPM_STREAM_START
)
1004 NULL
, SND_SOC_DAPM_POST_PMU
);
1005 else if (event
== SND_SOC_DAPM_STREAM_STOP
)
1007 NULL
, SND_SOC_DAPM_POST_PMD
);
1011 /* Queue it up for application */
1012 cur_sort
= sort
[w
->id
];
1013 cur_subseq
= w
->subseq
;
1016 list_move(&w
->power_list
, &pending
);
1021 dev_err(w
->dapm
->dev
,
1022 "Failed to apply widget power: %d\n", ret
);
1025 if (!list_empty(&pending
))
1026 dapm_seq_run_coalesced(cur_dapm
, &pending
);
1028 if (cur_dapm
&& cur_dapm
->seq_notifier
) {
1029 for (i
= 0; i
< ARRAY_SIZE(dapm_up_seq
); i
++)
1030 if (sort
[i
] == cur_sort
)
1031 cur_dapm
->seq_notifier(cur_dapm
,
1036 static void dapm_widget_update(struct snd_soc_dapm_context
*dapm
)
1038 struct snd_soc_dapm_update
*update
= dapm
->update
;
1039 struct snd_soc_dapm_widget
*w
;
1048 (w
->event_flags
& SND_SOC_DAPM_PRE_REG
)) {
1049 ret
= w
->event(w
, update
->kcontrol
, SND_SOC_DAPM_PRE_REG
);
1051 pr_err("%s DAPM pre-event failed: %d\n",
1055 ret
= snd_soc_update_bits(w
->codec
, update
->reg
, update
->mask
,
1058 pr_err("%s DAPM update failed: %d\n", w
->name
, ret
);
1061 (w
->event_flags
& SND_SOC_DAPM_POST_REG
)) {
1062 ret
= w
->event(w
, update
->kcontrol
, SND_SOC_DAPM_POST_REG
);
1064 pr_err("%s DAPM post-event failed: %d\n",
1069 /* Async callback run prior to DAPM sequences - brings to _PREPARE if
1070 * they're changing state.
1072 static void dapm_pre_sequence_async(void *data
, async_cookie_t cookie
)
1074 struct snd_soc_dapm_context
*d
= data
;
1077 /* If we're off and we're not supposed to be go into STANDBY */
1078 if (d
->bias_level
== SND_SOC_BIAS_OFF
&&
1079 d
->target_bias_level
!= SND_SOC_BIAS_OFF
) {
1080 ret
= snd_soc_dapm_set_bias_level(d
, SND_SOC_BIAS_STANDBY
);
1083 "Failed to turn on bias: %d\n", ret
);
1086 /* Prepare for a STADDBY->ON or ON->STANDBY transition */
1087 if (d
->bias_level
!= d
->target_bias_level
) {
1088 ret
= snd_soc_dapm_set_bias_level(d
, SND_SOC_BIAS_PREPARE
);
1091 "Failed to prepare bias: %d\n", ret
);
1095 /* Async callback run prior to DAPM sequences - brings to their final
1098 static void dapm_post_sequence_async(void *data
, async_cookie_t cookie
)
1100 struct snd_soc_dapm_context
*d
= data
;
1103 /* If we just powered the last thing off drop to standby bias */
1104 if (d
->bias_level
== SND_SOC_BIAS_PREPARE
&&
1105 (d
->target_bias_level
== SND_SOC_BIAS_STANDBY
||
1106 d
->target_bias_level
== SND_SOC_BIAS_OFF
)) {
1107 ret
= snd_soc_dapm_set_bias_level(d
, SND_SOC_BIAS_STANDBY
);
1109 dev_err(d
->dev
, "Failed to apply standby bias: %d\n",
1113 /* If we're in standby and can support bias off then do that */
1114 if (d
->bias_level
== SND_SOC_BIAS_STANDBY
&&
1115 d
->target_bias_level
== SND_SOC_BIAS_OFF
) {
1116 ret
= snd_soc_dapm_set_bias_level(d
, SND_SOC_BIAS_OFF
);
1118 dev_err(d
->dev
, "Failed to turn off bias: %d\n", ret
);
1121 /* If we just powered up then move to active bias */
1122 if (d
->bias_level
== SND_SOC_BIAS_PREPARE
&&
1123 d
->target_bias_level
== SND_SOC_BIAS_ON
) {
1124 ret
= snd_soc_dapm_set_bias_level(d
, SND_SOC_BIAS_ON
);
1126 dev_err(d
->dev
, "Failed to apply active bias: %d\n",
1132 * Scan each dapm widget for complete audio path.
1133 * A complete path is a route that has valid endpoints i.e.:-
1135 * o DAC to output pin.
1136 * o Input Pin to ADC.
1137 * o Input pin to Output pin (bypass, sidetone)
1138 * o DAC to ADC (loopback).
1140 static int dapm_power_widgets(struct snd_soc_dapm_context
*dapm
, int event
)
1142 struct snd_soc_card
*card
= dapm
->card
;
1143 struct snd_soc_dapm_widget
*w
;
1144 struct snd_soc_dapm_context
*d
;
1146 LIST_HEAD(down_list
);
1147 LIST_HEAD(async_domain
);
1148 enum snd_soc_bias_level bias
;
1151 trace_snd_soc_dapm_start(card
);
1153 list_for_each_entry(d
, &card
->dapm_list
, list
) {
1154 if (d
->n_widgets
|| d
->codec
== NULL
) {
1155 if (d
->idle_bias_off
)
1156 d
->target_bias_level
= SND_SOC_BIAS_OFF
;
1158 d
->target_bias_level
= SND_SOC_BIAS_STANDBY
;
1162 /* Check which widgets we need to power and store them in
1163 * lists indicating if they should be powered up or down.
1165 list_for_each_entry(w
, &card
->widgets
, list
) {
1167 case snd_soc_dapm_pre
:
1168 dapm_seq_insert(w
, &down_list
, false);
1170 case snd_soc_dapm_post
:
1171 dapm_seq_insert(w
, &up_list
, true);
1175 if (!w
->power_check
)
1179 power
= w
->power_check(w
);
1186 /* Supplies and micbiases only bring
1187 * the context up to STANDBY as unless
1188 * something else is active and
1189 * passing audio they generally don't
1190 * require full power.
1193 case snd_soc_dapm_supply
:
1194 case snd_soc_dapm_micbias
:
1195 if (d
->target_bias_level
< SND_SOC_BIAS_STANDBY
)
1196 d
->target_bias_level
= SND_SOC_BIAS_STANDBY
;
1199 d
->target_bias_level
= SND_SOC_BIAS_ON
;
1204 if (w
->power
== power
)
1207 trace_snd_soc_dapm_widget_power(w
, power
);
1210 dapm_seq_insert(w
, &up_list
, true);
1212 dapm_seq_insert(w
, &down_list
, false);
1219 /* If there are no DAPM widgets then try to figure out power from the
1222 if (!dapm
->n_widgets
) {
1224 case SND_SOC_DAPM_STREAM_START
:
1225 case SND_SOC_DAPM_STREAM_RESUME
:
1226 dapm
->target_bias_level
= SND_SOC_BIAS_ON
;
1228 case SND_SOC_DAPM_STREAM_STOP
:
1229 if (dapm
->codec
->active
)
1230 dapm
->target_bias_level
= SND_SOC_BIAS_ON
;
1232 dapm
->target_bias_level
= SND_SOC_BIAS_STANDBY
;
1234 case SND_SOC_DAPM_STREAM_SUSPEND
:
1235 dapm
->target_bias_level
= SND_SOC_BIAS_STANDBY
;
1237 case SND_SOC_DAPM_STREAM_NOP
:
1238 dapm
->target_bias_level
= dapm
->bias_level
;
1245 /* Force all contexts in the card to the same bias state */
1246 bias
= SND_SOC_BIAS_OFF
;
1247 list_for_each_entry(d
, &card
->dapm_list
, list
)
1248 if (d
->target_bias_level
> bias
)
1249 bias
= d
->target_bias_level
;
1250 list_for_each_entry(d
, &card
->dapm_list
, list
)
1251 d
->target_bias_level
= bias
;
1254 /* Run all the bias changes in parallel */
1255 list_for_each_entry(d
, &dapm
->card
->dapm_list
, list
)
1256 async_schedule_domain(dapm_pre_sequence_async
, d
,
1258 async_synchronize_full_domain(&async_domain
);
1260 /* Power down widgets first; try to avoid amplifying pops. */
1261 dapm_seq_run(dapm
, &down_list
, event
, false);
1263 dapm_widget_update(dapm
);
1266 dapm_seq_run(dapm
, &up_list
, event
, true);
1268 /* Run all the bias changes in parallel */
1269 list_for_each_entry(d
, &dapm
->card
->dapm_list
, list
)
1270 async_schedule_domain(dapm_post_sequence_async
, d
,
1272 async_synchronize_full_domain(&async_domain
);
1274 pop_dbg(dapm
->dev
, card
->pop_time
,
1275 "DAPM sequencing finished, waiting %dms\n", card
->pop_time
);
1276 pop_wait(card
->pop_time
);
1278 trace_snd_soc_dapm_done(card
);
1283 #ifdef CONFIG_DEBUG_FS
1284 static int dapm_widget_power_open_file(struct inode
*inode
, struct file
*file
)
1286 file
->private_data
= inode
->i_private
;
1290 static ssize_t
dapm_widget_power_read_file(struct file
*file
,
1291 char __user
*user_buf
,
1292 size_t count
, loff_t
*ppos
)
1294 struct snd_soc_dapm_widget
*w
= file
->private_data
;
1298 struct snd_soc_dapm_path
*p
= NULL
;
1300 buf
= kmalloc(PAGE_SIZE
, GFP_KERNEL
);
1304 in
= is_connected_input_ep(w
);
1305 dapm_clear_walk(w
->dapm
);
1306 out
= is_connected_output_ep(w
);
1307 dapm_clear_walk(w
->dapm
);
1309 ret
= snprintf(buf
, PAGE_SIZE
, "%s: %s in %d out %d",
1310 w
->name
, w
->power
? "On" : "Off", in
, out
);
1313 ret
+= snprintf(buf
+ ret
, PAGE_SIZE
- ret
,
1314 " - R%d(0x%x) bit %d",
1315 w
->reg
, w
->reg
, w
->shift
);
1317 ret
+= snprintf(buf
+ ret
, PAGE_SIZE
- ret
, "\n");
1320 ret
+= snprintf(buf
+ ret
, PAGE_SIZE
- ret
, " stream %s %s\n",
1322 w
->active
? "active" : "inactive");
1324 list_for_each_entry(p
, &w
->sources
, list_sink
) {
1325 if (p
->connected
&& !p
->connected(w
, p
->sink
))
1329 ret
+= snprintf(buf
+ ret
, PAGE_SIZE
- ret
,
1330 " in \"%s\" \"%s\"\n",
1331 p
->name
? p
->name
: "static",
1334 list_for_each_entry(p
, &w
->sinks
, list_source
) {
1335 if (p
->connected
&& !p
->connected(w
, p
->sink
))
1339 ret
+= snprintf(buf
+ ret
, PAGE_SIZE
- ret
,
1340 " out \"%s\" \"%s\"\n",
1341 p
->name
? p
->name
: "static",
1345 ret
= simple_read_from_buffer(user_buf
, count
, ppos
, buf
, ret
);
1351 static const struct file_operations dapm_widget_power_fops
= {
1352 .open
= dapm_widget_power_open_file
,
1353 .read
= dapm_widget_power_read_file
,
1354 .llseek
= default_llseek
,
1357 static int dapm_bias_open_file(struct inode
*inode
, struct file
*file
)
1359 file
->private_data
= inode
->i_private
;
1363 static ssize_t
dapm_bias_read_file(struct file
*file
, char __user
*user_buf
,
1364 size_t count
, loff_t
*ppos
)
1366 struct snd_soc_dapm_context
*dapm
= file
->private_data
;
1369 switch (dapm
->bias_level
) {
1370 case SND_SOC_BIAS_ON
:
1373 case SND_SOC_BIAS_PREPARE
:
1374 level
= "Prepare\n";
1376 case SND_SOC_BIAS_STANDBY
:
1377 level
= "Standby\n";
1379 case SND_SOC_BIAS_OFF
:
1384 level
= "Unknown\n";
1388 return simple_read_from_buffer(user_buf
, count
, ppos
, level
,
1392 static const struct file_operations dapm_bias_fops
= {
1393 .open
= dapm_bias_open_file
,
1394 .read
= dapm_bias_read_file
,
1395 .llseek
= default_llseek
,
1398 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context
*dapm
,
1399 struct dentry
*parent
)
1403 dapm
->debugfs_dapm
= debugfs_create_dir("dapm", parent
);
1405 if (!dapm
->debugfs_dapm
) {
1407 "Failed to create DAPM debugfs directory\n");
1411 d
= debugfs_create_file("bias_level", 0444,
1412 dapm
->debugfs_dapm
, dapm
,
1416 "ASoC: Failed to create bias level debugfs file\n");
1419 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget
*w
)
1421 struct snd_soc_dapm_context
*dapm
= w
->dapm
;
1424 if (!dapm
->debugfs_dapm
|| !w
->name
)
1427 d
= debugfs_create_file(w
->name
, 0444,
1428 dapm
->debugfs_dapm
, w
,
1429 &dapm_widget_power_fops
);
1431 dev_warn(w
->dapm
->dev
,
1432 "ASoC: Failed to create %s debugfs file\n",
1436 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context
*dapm
)
1438 debugfs_remove_recursive(dapm
->debugfs_dapm
);
1442 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context
*dapm
,
1443 struct dentry
*parent
)
1447 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget
*w
)
1451 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context
*dapm
)
1457 /* test and update the power status of a mux widget */
1458 static int dapm_mux_update_power(struct snd_soc_dapm_widget
*widget
,
1459 struct snd_kcontrol
*kcontrol
, int change
,
1460 int mux
, struct soc_enum
*e
)
1462 struct snd_soc_dapm_path
*path
;
1465 if (widget
->id
!= snd_soc_dapm_mux
&&
1466 widget
->id
!= snd_soc_dapm_virt_mux
&&
1467 widget
->id
!= snd_soc_dapm_value_mux
)
1473 /* find dapm widget path assoc with kcontrol */
1474 list_for_each_entry(path
, &widget
->dapm
->card
->paths
, list
) {
1475 if (path
->kcontrol
!= kcontrol
)
1478 if (!path
->name
|| !e
->texts
[mux
])
1482 /* we now need to match the string in the enum to the path */
1483 if (!(strcmp(path
->name
, e
->texts
[mux
])))
1484 path
->connect
= 1; /* new connection */
1486 path
->connect
= 0; /* old connection must be powered down */
1490 dapm_power_widgets(widget
->dapm
, SND_SOC_DAPM_STREAM_NOP
);
1495 /* test and update the power status of a mixer or switch widget */
1496 static int dapm_mixer_update_power(struct snd_soc_dapm_widget
*widget
,
1497 struct snd_kcontrol
*kcontrol
, int connect
)
1499 struct snd_soc_dapm_path
*path
;
1502 if (widget
->id
!= snd_soc_dapm_mixer
&&
1503 widget
->id
!= snd_soc_dapm_mixer_named_ctl
&&
1504 widget
->id
!= snd_soc_dapm_switch
)
1507 /* find dapm widget path assoc with kcontrol */
1508 list_for_each_entry(path
, &widget
->dapm
->card
->paths
, list
) {
1509 if (path
->kcontrol
!= kcontrol
)
1512 /* found, now check type */
1514 path
->connect
= connect
;
1519 dapm_power_widgets(widget
->dapm
, SND_SOC_DAPM_STREAM_NOP
);
1524 /* show dapm widget status in sys fs */
1525 static ssize_t
dapm_widget_show(struct device
*dev
,
1526 struct device_attribute
*attr
, char *buf
)
1528 struct snd_soc_pcm_runtime
*rtd
=
1529 container_of(dev
, struct snd_soc_pcm_runtime
, dev
);
1530 struct snd_soc_codec
*codec
=rtd
->codec
;
1531 struct snd_soc_dapm_widget
*w
;
1533 char *state
= "not set";
1535 list_for_each_entry(w
, &codec
->card
->widgets
, list
) {
1536 if (w
->dapm
!= &codec
->dapm
)
1539 /* only display widgets that burnm power */
1541 case snd_soc_dapm_hp
:
1542 case snd_soc_dapm_mic
:
1543 case snd_soc_dapm_spk
:
1544 case snd_soc_dapm_line
:
1545 case snd_soc_dapm_micbias
:
1546 case snd_soc_dapm_dac
:
1547 case snd_soc_dapm_adc
:
1548 case snd_soc_dapm_pga
:
1549 case snd_soc_dapm_out_drv
:
1550 case snd_soc_dapm_mixer
:
1551 case snd_soc_dapm_mixer_named_ctl
:
1552 case snd_soc_dapm_supply
:
1554 count
+= sprintf(buf
+ count
, "%s: %s\n",
1555 w
->name
, w
->power
? "On":"Off");
1562 switch (codec
->dapm
.bias_level
) {
1563 case SND_SOC_BIAS_ON
:
1566 case SND_SOC_BIAS_PREPARE
:
1569 case SND_SOC_BIAS_STANDBY
:
1572 case SND_SOC_BIAS_OFF
:
1576 count
+= sprintf(buf
+ count
, "PM State: %s\n", state
);
1581 static DEVICE_ATTR(dapm_widget
, 0444, dapm_widget_show
, NULL
);
1583 int snd_soc_dapm_sys_add(struct device
*dev
)
1585 return device_create_file(dev
, &dev_attr_dapm_widget
);
1588 static void snd_soc_dapm_sys_remove(struct device
*dev
)
1590 device_remove_file(dev
, &dev_attr_dapm_widget
);
1593 /* free all dapm widgets and resources */
1594 static void dapm_free_widgets(struct snd_soc_dapm_context
*dapm
)
1596 struct snd_soc_dapm_widget
*w
, *next_w
;
1597 struct snd_soc_dapm_path
*p
, *next_p
;
1599 list_for_each_entry_safe(w
, next_w
, &dapm
->card
->widgets
, list
) {
1600 if (w
->dapm
!= dapm
)
1604 * remove source and sink paths associated to this widget.
1605 * While removing the path, remove reference to it from both
1606 * source and sink widgets so that path is removed only once.
1608 list_for_each_entry_safe(p
, next_p
, &w
->sources
, list_sink
) {
1609 list_del(&p
->list_sink
);
1610 list_del(&p
->list_source
);
1612 kfree(p
->long_name
);
1615 list_for_each_entry_safe(p
, next_p
, &w
->sinks
, list_source
) {
1616 list_del(&p
->list_sink
);
1617 list_del(&p
->list_source
);
1619 kfree(p
->long_name
);
1622 kfree(w
->kcontrols
);
1628 static struct snd_soc_dapm_widget
*dapm_find_widget(
1629 struct snd_soc_dapm_context
*dapm
, const char *pin
,
1630 bool search_other_contexts
)
1632 struct snd_soc_dapm_widget
*w
;
1633 struct snd_soc_dapm_widget
*fallback
= NULL
;
1635 list_for_each_entry(w
, &dapm
->card
->widgets
, list
) {
1636 if (!strcmp(w
->name
, pin
)) {
1637 if (w
->dapm
== dapm
)
1644 if (search_other_contexts
)
1650 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context
*dapm
,
1651 const char *pin
, int status
)
1653 struct snd_soc_dapm_widget
*w
= dapm_find_widget(dapm
, pin
, true);
1656 dev_err(dapm
->dev
, "dapm: unknown pin %s\n", pin
);
1660 w
->connected
= status
;
1668 * snd_soc_dapm_sync - scan and power dapm paths
1669 * @dapm: DAPM context
1671 * Walks all dapm audio paths and powers widgets according to their
1672 * stream or path usage.
1674 * Returns 0 for success.
1676 int snd_soc_dapm_sync(struct snd_soc_dapm_context
*dapm
)
1678 return dapm_power_widgets(dapm
, SND_SOC_DAPM_STREAM_NOP
);
1680 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync
);
1682 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context
*dapm
,
1683 const struct snd_soc_dapm_route
*route
)
1685 struct snd_soc_dapm_path
*path
;
1686 struct snd_soc_dapm_widget
*wsource
= NULL
, *wsink
= NULL
, *w
;
1687 struct snd_soc_dapm_widget
*wtsource
= NULL
, *wtsink
= NULL
;
1689 const char *control
= route
->control
;
1691 char prefixed_sink
[80];
1692 char prefixed_source
[80];
1695 if (dapm
->codec
&& dapm
->codec
->name_prefix
) {
1696 snprintf(prefixed_sink
, sizeof(prefixed_sink
), "%s %s",
1697 dapm
->codec
->name_prefix
, route
->sink
);
1698 sink
= prefixed_sink
;
1699 snprintf(prefixed_source
, sizeof(prefixed_source
), "%s %s",
1700 dapm
->codec
->name_prefix
, route
->source
);
1701 source
= prefixed_source
;
1704 source
= route
->source
;
1708 * find src and dest widgets over all widgets but favor a widget from
1709 * current DAPM context
1711 list_for_each_entry(w
, &dapm
->card
->widgets
, list
) {
1712 if (!wsink
&& !(strcmp(w
->name
, sink
))) {
1714 if (w
->dapm
== dapm
)
1718 if (!wsource
&& !(strcmp(w
->name
, source
))) {
1720 if (w
->dapm
== dapm
)
1724 /* use widget from another DAPM context if not found from this */
1730 if (wsource
== NULL
|| wsink
== NULL
)
1733 path
= kzalloc(sizeof(struct snd_soc_dapm_path
), GFP_KERNEL
);
1737 path
->source
= wsource
;
1739 path
->connected
= route
->connected
;
1740 INIT_LIST_HEAD(&path
->list
);
1741 INIT_LIST_HEAD(&path
->list_source
);
1742 INIT_LIST_HEAD(&path
->list_sink
);
1744 /* check for external widgets */
1745 if (wsink
->id
== snd_soc_dapm_input
) {
1746 if (wsource
->id
== snd_soc_dapm_micbias
||
1747 wsource
->id
== snd_soc_dapm_mic
||
1748 wsource
->id
== snd_soc_dapm_line
||
1749 wsource
->id
== snd_soc_dapm_output
)
1752 if (wsource
->id
== snd_soc_dapm_output
) {
1753 if (wsink
->id
== snd_soc_dapm_spk
||
1754 wsink
->id
== snd_soc_dapm_hp
||
1755 wsink
->id
== snd_soc_dapm_line
||
1756 wsink
->id
== snd_soc_dapm_input
)
1760 /* connect static paths */
1761 if (control
== NULL
) {
1762 list_add(&path
->list
, &dapm
->card
->paths
);
1763 list_add(&path
->list_sink
, &wsink
->sources
);
1764 list_add(&path
->list_source
, &wsource
->sinks
);
1769 /* connect dynamic paths */
1770 switch (wsink
->id
) {
1771 case snd_soc_dapm_adc
:
1772 case snd_soc_dapm_dac
:
1773 case snd_soc_dapm_pga
:
1774 case snd_soc_dapm_out_drv
:
1775 case snd_soc_dapm_input
:
1776 case snd_soc_dapm_output
:
1777 case snd_soc_dapm_micbias
:
1778 case snd_soc_dapm_vmid
:
1779 case snd_soc_dapm_pre
:
1780 case snd_soc_dapm_post
:
1781 case snd_soc_dapm_supply
:
1782 case snd_soc_dapm_aif_in
:
1783 case snd_soc_dapm_aif_out
:
1784 list_add(&path
->list
, &dapm
->card
->paths
);
1785 list_add(&path
->list_sink
, &wsink
->sources
);
1786 list_add(&path
->list_source
, &wsource
->sinks
);
1789 case snd_soc_dapm_mux
:
1790 case snd_soc_dapm_virt_mux
:
1791 case snd_soc_dapm_value_mux
:
1792 ret
= dapm_connect_mux(dapm
, wsource
, wsink
, path
, control
,
1793 &wsink
->kcontrol_news
[0]);
1797 case snd_soc_dapm_switch
:
1798 case snd_soc_dapm_mixer
:
1799 case snd_soc_dapm_mixer_named_ctl
:
1800 ret
= dapm_connect_mixer(dapm
, wsource
, wsink
, path
, control
);
1804 case snd_soc_dapm_hp
:
1805 case snd_soc_dapm_mic
:
1806 case snd_soc_dapm_line
:
1807 case snd_soc_dapm_spk
:
1808 list_add(&path
->list
, &dapm
->card
->paths
);
1809 list_add(&path
->list_sink
, &wsink
->sources
);
1810 list_add(&path
->list_source
, &wsource
->sinks
);
1817 dev_warn(dapm
->dev
, "asoc: no dapm match for %s --> %s --> %s\n",
1818 source
, control
, sink
);
1824 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1825 * @dapm: DAPM context
1826 * @route: audio routes
1827 * @num: number of routes
1829 * Connects 2 dapm widgets together via a named audio path. The sink is
1830 * the widget receiving the audio signal, whilst the source is the sender
1831 * of the audio signal.
1833 * Returns 0 for success else error. On error all resources can be freed
1834 * with a call to snd_soc_card_free().
1836 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context
*dapm
,
1837 const struct snd_soc_dapm_route
*route
, int num
)
1841 for (i
= 0; i
< num
; i
++) {
1842 ret
= snd_soc_dapm_add_route(dapm
, route
);
1844 dev_err(dapm
->dev
, "Failed to add route %s->%s\n",
1845 route
->source
, route
->sink
);
1853 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes
);
1855 static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context
*dapm
,
1856 const struct snd_soc_dapm_route
*route
)
1858 struct snd_soc_dapm_widget
*source
= dapm_find_widget(dapm
,
1861 struct snd_soc_dapm_widget
*sink
= dapm_find_widget(dapm
,
1864 struct snd_soc_dapm_path
*path
;
1868 dev_err(dapm
->dev
, "Unable to find source %s for weak route\n",
1874 dev_err(dapm
->dev
, "Unable to find sink %s for weak route\n",
1879 if (route
->control
|| route
->connected
)
1880 dev_warn(dapm
->dev
, "Ignoring control for weak route %s->%s\n",
1881 route
->source
, route
->sink
);
1883 list_for_each_entry(path
, &source
->sinks
, list_source
) {
1884 if (path
->sink
== sink
) {
1891 dev_err(dapm
->dev
, "No path found for weak route %s->%s\n",
1892 route
->source
, route
->sink
);
1894 dev_warn(dapm
->dev
, "%d paths found for weak route %s->%s\n",
1895 count
, route
->source
, route
->sink
);
1901 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
1902 * @dapm: DAPM context
1903 * @route: audio routes
1904 * @num: number of routes
1906 * Mark existing routes matching those specified in the passed array
1907 * as being weak, meaning that they are ignored for the purpose of
1908 * power decisions. The main intended use case is for sidetone paths
1909 * which couple audio between other independent paths if they are both
1910 * active in order to make the combination work better at the user
1911 * level but which aren't intended to be "used".
1913 * Note that CODEC drivers should not use this as sidetone type paths
1914 * can frequently also be used as bypass paths.
1916 int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context
*dapm
,
1917 const struct snd_soc_dapm_route
*route
, int num
)
1922 for (i
= 0; i
< num
; i
++) {
1923 err
= snd_soc_dapm_weak_route(dapm
, route
);
1931 EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes
);
1934 * snd_soc_dapm_new_widgets - add new dapm widgets
1935 * @dapm: DAPM context
1937 * Checks the codec for any new dapm widgets and creates them if found.
1939 * Returns 0 for success.
1941 int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context
*dapm
)
1943 struct snd_soc_dapm_widget
*w
;
1946 list_for_each_entry(w
, &dapm
->card
->widgets
, list
)
1951 if (w
->num_kcontrols
) {
1952 w
->kcontrols
= kzalloc(w
->num_kcontrols
*
1953 sizeof(struct snd_kcontrol
*),
1960 case snd_soc_dapm_switch
:
1961 case snd_soc_dapm_mixer
:
1962 case snd_soc_dapm_mixer_named_ctl
:
1963 w
->power_check
= dapm_generic_check_power
;
1966 case snd_soc_dapm_mux
:
1967 case snd_soc_dapm_virt_mux
:
1968 case snd_soc_dapm_value_mux
:
1969 w
->power_check
= dapm_generic_check_power
;
1972 case snd_soc_dapm_adc
:
1973 case snd_soc_dapm_aif_out
:
1974 w
->power_check
= dapm_adc_check_power
;
1976 case snd_soc_dapm_dac
:
1977 case snd_soc_dapm_aif_in
:
1978 w
->power_check
= dapm_dac_check_power
;
1980 case snd_soc_dapm_pga
:
1981 case snd_soc_dapm_out_drv
:
1982 w
->power_check
= dapm_generic_check_power
;
1985 case snd_soc_dapm_input
:
1986 case snd_soc_dapm_output
:
1987 case snd_soc_dapm_micbias
:
1988 case snd_soc_dapm_spk
:
1989 case snd_soc_dapm_hp
:
1990 case snd_soc_dapm_mic
:
1991 case snd_soc_dapm_line
:
1992 w
->power_check
= dapm_generic_check_power
;
1994 case snd_soc_dapm_supply
:
1995 w
->power_check
= dapm_supply_check_power
;
1996 case snd_soc_dapm_vmid
:
1997 case snd_soc_dapm_pre
:
1998 case snd_soc_dapm_post
:
2002 /* Read the initial power state from the device */
2004 val
= soc_widget_read(w
, w
->reg
);
2005 val
&= 1 << w
->shift
;
2015 dapm_debugfs_add_widget(w
);
2018 dapm_power_widgets(dapm
, SND_SOC_DAPM_STREAM_NOP
);
2021 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets
);
2024 * snd_soc_dapm_get_volsw - dapm mixer get callback
2025 * @kcontrol: mixer control
2026 * @ucontrol: control element information
2028 * Callback to get the value of a dapm mixer control.
2030 * Returns 0 for success.
2032 int snd_soc_dapm_get_volsw(struct snd_kcontrol
*kcontrol
,
2033 struct snd_ctl_elem_value
*ucontrol
)
2035 struct snd_soc_dapm_widget_list
*wlist
= snd_kcontrol_chip(kcontrol
);
2036 struct snd_soc_dapm_widget
*widget
= wlist
->widgets
[0];
2037 struct soc_mixer_control
*mc
=
2038 (struct soc_mixer_control
*)kcontrol
->private_value
;
2039 unsigned int reg
= mc
->reg
;
2040 unsigned int shift
= mc
->shift
;
2041 unsigned int rshift
= mc
->rshift
;
2043 unsigned int invert
= mc
->invert
;
2044 unsigned int mask
= (1 << fls(max
)) - 1;
2046 ucontrol
->value
.integer
.value
[0] =
2047 (snd_soc_read(widget
->codec
, reg
) >> shift
) & mask
;
2048 if (shift
!= rshift
)
2049 ucontrol
->value
.integer
.value
[1] =
2050 (snd_soc_read(widget
->codec
, reg
) >> rshift
) & mask
;
2052 ucontrol
->value
.integer
.value
[0] =
2053 max
- ucontrol
->value
.integer
.value
[0];
2054 if (shift
!= rshift
)
2055 ucontrol
->value
.integer
.value
[1] =
2056 max
- ucontrol
->value
.integer
.value
[1];
2061 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw
);
2064 * snd_soc_dapm_put_volsw - dapm mixer set callback
2065 * @kcontrol: mixer control
2066 * @ucontrol: control element information
2068 * Callback to set the value of a dapm mixer control.
2070 * Returns 0 for success.
2072 int snd_soc_dapm_put_volsw(struct snd_kcontrol
*kcontrol
,
2073 struct snd_ctl_elem_value
*ucontrol
)
2075 struct snd_soc_dapm_widget_list
*wlist
= snd_kcontrol_chip(kcontrol
);
2076 struct snd_soc_dapm_widget
*widget
= wlist
->widgets
[0];
2077 struct snd_soc_codec
*codec
= widget
->codec
;
2078 struct soc_mixer_control
*mc
=
2079 (struct soc_mixer_control
*)kcontrol
->private_value
;
2080 unsigned int reg
= mc
->reg
;
2081 unsigned int shift
= mc
->shift
;
2083 unsigned int mask
= (1 << fls(max
)) - 1;
2084 unsigned int invert
= mc
->invert
;
2086 int connect
, change
;
2087 struct snd_soc_dapm_update update
;
2090 val
= (ucontrol
->value
.integer
.value
[0] & mask
);
2094 mask
= mask
<< shift
;
2098 /* new connection */
2099 connect
= invert
? 0 : 1;
2101 /* old connection must be powered down */
2102 connect
= invert
? 1 : 0;
2104 mutex_lock(&codec
->mutex
);
2106 change
= snd_soc_test_bits(widget
->codec
, reg
, mask
, val
);
2108 for (wi
= 0; wi
< wlist
->num_widgets
; wi
++) {
2109 widget
= wlist
->widgets
[wi
];
2111 widget
->value
= val
;
2113 update
.kcontrol
= kcontrol
;
2114 update
.widget
= widget
;
2118 widget
->dapm
->update
= &update
;
2120 dapm_mixer_update_power(widget
, kcontrol
, connect
);
2122 widget
->dapm
->update
= NULL
;
2126 mutex_unlock(&codec
->mutex
);
2129 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw
);
2132 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
2133 * @kcontrol: mixer control
2134 * @ucontrol: control element information
2136 * Callback to get the value of a dapm enumerated double mixer control.
2138 * Returns 0 for success.
2140 int snd_soc_dapm_get_enum_double(struct snd_kcontrol
*kcontrol
,
2141 struct snd_ctl_elem_value
*ucontrol
)
2143 struct snd_soc_dapm_widget_list
*wlist
= snd_kcontrol_chip(kcontrol
);
2144 struct snd_soc_dapm_widget
*widget
= wlist
->widgets
[0];
2145 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
2146 unsigned int val
, bitmask
;
2148 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
2150 val
= snd_soc_read(widget
->codec
, e
->reg
);
2151 ucontrol
->value
.enumerated
.item
[0] = (val
>> e
->shift_l
) & (bitmask
- 1);
2152 if (e
->shift_l
!= e
->shift_r
)
2153 ucontrol
->value
.enumerated
.item
[1] =
2154 (val
>> e
->shift_r
) & (bitmask
- 1);
2158 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double
);
2161 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
2162 * @kcontrol: mixer control
2163 * @ucontrol: control element information
2165 * Callback to set the value of a dapm enumerated double mixer control.
2167 * Returns 0 for success.
2169 int snd_soc_dapm_put_enum_double(struct snd_kcontrol
*kcontrol
,
2170 struct snd_ctl_elem_value
*ucontrol
)
2172 struct snd_soc_dapm_widget_list
*wlist
= snd_kcontrol_chip(kcontrol
);
2173 struct snd_soc_dapm_widget
*widget
= wlist
->widgets
[0];
2174 struct snd_soc_codec
*codec
= widget
->codec
;
2175 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
2176 unsigned int val
, mux
, change
;
2177 unsigned int mask
, bitmask
;
2178 struct snd_soc_dapm_update update
;
2181 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
2183 if (ucontrol
->value
.enumerated
.item
[0] > e
->max
- 1)
2185 mux
= ucontrol
->value
.enumerated
.item
[0];
2186 val
= mux
<< e
->shift_l
;
2187 mask
= (bitmask
- 1) << e
->shift_l
;
2188 if (e
->shift_l
!= e
->shift_r
) {
2189 if (ucontrol
->value
.enumerated
.item
[1] > e
->max
- 1)
2191 val
|= ucontrol
->value
.enumerated
.item
[1] << e
->shift_r
;
2192 mask
|= (bitmask
- 1) << e
->shift_r
;
2195 mutex_lock(&codec
->mutex
);
2197 change
= snd_soc_test_bits(widget
->codec
, e
->reg
, mask
, val
);
2199 for (wi
= 0; wi
< wlist
->num_widgets
; wi
++) {
2200 widget
= wlist
->widgets
[wi
];
2202 widget
->value
= val
;
2204 update
.kcontrol
= kcontrol
;
2205 update
.widget
= widget
;
2206 update
.reg
= e
->reg
;
2209 widget
->dapm
->update
= &update
;
2211 dapm_mux_update_power(widget
, kcontrol
, change
, mux
, e
);
2213 widget
->dapm
->update
= NULL
;
2217 mutex_unlock(&codec
->mutex
);
2220 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double
);
2223 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
2224 * @kcontrol: mixer control
2225 * @ucontrol: control element information
2227 * Returns 0 for success.
2229 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol
*kcontrol
,
2230 struct snd_ctl_elem_value
*ucontrol
)
2232 struct snd_soc_dapm_widget_list
*wlist
= snd_kcontrol_chip(kcontrol
);
2233 struct snd_soc_dapm_widget
*widget
= wlist
->widgets
[0];
2235 ucontrol
->value
.enumerated
.item
[0] = widget
->value
;
2239 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt
);
2242 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
2243 * @kcontrol: mixer control
2244 * @ucontrol: control element information
2246 * Returns 0 for success.
2248 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol
*kcontrol
,
2249 struct snd_ctl_elem_value
*ucontrol
)
2251 struct snd_soc_dapm_widget_list
*wlist
= snd_kcontrol_chip(kcontrol
);
2252 struct snd_soc_dapm_widget
*widget
= wlist
->widgets
[0];
2253 struct snd_soc_codec
*codec
= widget
->codec
;
2254 struct soc_enum
*e
=
2255 (struct soc_enum
*)kcontrol
->private_value
;
2260 if (ucontrol
->value
.enumerated
.item
[0] >= e
->max
)
2263 mutex_lock(&codec
->mutex
);
2265 change
= widget
->value
!= ucontrol
->value
.enumerated
.item
[0];
2267 for (wi
= 0; wi
< wlist
->num_widgets
; wi
++) {
2268 widget
= wlist
->widgets
[wi
];
2270 widget
->value
= ucontrol
->value
.enumerated
.item
[0];
2272 dapm_mux_update_power(widget
, kcontrol
, change
,
2277 mutex_unlock(&codec
->mutex
);
2280 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt
);
2283 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
2285 * @kcontrol: mixer control
2286 * @ucontrol: control element information
2288 * Callback to get the value of a dapm semi enumerated double mixer control.
2290 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2291 * used for handling bitfield coded enumeration for example.
2293 * Returns 0 for success.
2295 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol
*kcontrol
,
2296 struct snd_ctl_elem_value
*ucontrol
)
2298 struct snd_soc_dapm_widget_list
*wlist
= snd_kcontrol_chip(kcontrol
);
2299 struct snd_soc_dapm_widget
*widget
= wlist
->widgets
[0];
2300 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
2301 unsigned int reg_val
, val
, mux
;
2303 reg_val
= snd_soc_read(widget
->codec
, e
->reg
);
2304 val
= (reg_val
>> e
->shift_l
) & e
->mask
;
2305 for (mux
= 0; mux
< e
->max
; mux
++) {
2306 if (val
== e
->values
[mux
])
2309 ucontrol
->value
.enumerated
.item
[0] = mux
;
2310 if (e
->shift_l
!= e
->shift_r
) {
2311 val
= (reg_val
>> e
->shift_r
) & e
->mask
;
2312 for (mux
= 0; mux
< e
->max
; mux
++) {
2313 if (val
== e
->values
[mux
])
2316 ucontrol
->value
.enumerated
.item
[1] = mux
;
2321 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double
);
2324 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
2326 * @kcontrol: mixer control
2327 * @ucontrol: control element information
2329 * Callback to set the value of a dapm semi enumerated double mixer control.
2331 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2332 * used for handling bitfield coded enumeration for example.
2334 * Returns 0 for success.
2336 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol
*kcontrol
,
2337 struct snd_ctl_elem_value
*ucontrol
)
2339 struct snd_soc_dapm_widget_list
*wlist
= snd_kcontrol_chip(kcontrol
);
2340 struct snd_soc_dapm_widget
*widget
= wlist
->widgets
[0];
2341 struct snd_soc_codec
*codec
= widget
->codec
;
2342 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
2343 unsigned int val
, mux
, change
;
2345 struct snd_soc_dapm_update update
;
2348 if (ucontrol
->value
.enumerated
.item
[0] > e
->max
- 1)
2350 mux
= ucontrol
->value
.enumerated
.item
[0];
2351 val
= e
->values
[ucontrol
->value
.enumerated
.item
[0]] << e
->shift_l
;
2352 mask
= e
->mask
<< e
->shift_l
;
2353 if (e
->shift_l
!= e
->shift_r
) {
2354 if (ucontrol
->value
.enumerated
.item
[1] > e
->max
- 1)
2356 val
|= e
->values
[ucontrol
->value
.enumerated
.item
[1]] << e
->shift_r
;
2357 mask
|= e
->mask
<< e
->shift_r
;
2360 mutex_lock(&codec
->mutex
);
2362 change
= snd_soc_test_bits(widget
->codec
, e
->reg
, mask
, val
);
2364 for (wi
= 0; wi
< wlist
->num_widgets
; wi
++) {
2365 widget
= wlist
->widgets
[wi
];
2367 widget
->value
= val
;
2369 update
.kcontrol
= kcontrol
;
2370 update
.widget
= widget
;
2371 update
.reg
= e
->reg
;
2374 widget
->dapm
->update
= &update
;
2376 dapm_mux_update_power(widget
, kcontrol
, change
, mux
, e
);
2378 widget
->dapm
->update
= NULL
;
2382 mutex_unlock(&codec
->mutex
);
2385 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double
);
2388 * snd_soc_dapm_info_pin_switch - Info for a pin switch
2390 * @kcontrol: mixer control
2391 * @uinfo: control element information
2393 * Callback to provide information about a pin switch control.
2395 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol
*kcontrol
,
2396 struct snd_ctl_elem_info
*uinfo
)
2398 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_BOOLEAN
;
2400 uinfo
->value
.integer
.min
= 0;
2401 uinfo
->value
.integer
.max
= 1;
2405 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch
);
2408 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
2410 * @kcontrol: mixer control
2413 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol
*kcontrol
,
2414 struct snd_ctl_elem_value
*ucontrol
)
2416 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
2417 const char *pin
= (const char *)kcontrol
->private_value
;
2419 mutex_lock(&codec
->mutex
);
2421 ucontrol
->value
.integer
.value
[0] =
2422 snd_soc_dapm_get_pin_status(&codec
->dapm
, pin
);
2424 mutex_unlock(&codec
->mutex
);
2428 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch
);
2431 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
2433 * @kcontrol: mixer control
2436 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol
*kcontrol
,
2437 struct snd_ctl_elem_value
*ucontrol
)
2439 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
2440 const char *pin
= (const char *)kcontrol
->private_value
;
2442 mutex_lock(&codec
->mutex
);
2444 if (ucontrol
->value
.integer
.value
[0])
2445 snd_soc_dapm_enable_pin(&codec
->dapm
, pin
);
2447 snd_soc_dapm_disable_pin(&codec
->dapm
, pin
);
2449 snd_soc_dapm_sync(&codec
->dapm
);
2451 mutex_unlock(&codec
->mutex
);
2455 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch
);
2458 * snd_soc_dapm_new_control - create new dapm control
2459 * @dapm: DAPM context
2460 * @widget: widget template
2462 * Creates a new dapm control based upon the template.
2464 * Returns 0 for success else error.
2466 int snd_soc_dapm_new_control(struct snd_soc_dapm_context
*dapm
,
2467 const struct snd_soc_dapm_widget
*widget
)
2469 struct snd_soc_dapm_widget
*w
;
2472 if ((w
= dapm_cnew_widget(widget
)) == NULL
)
2475 name_len
= strlen(widget
->name
) + 1;
2476 if (dapm
->codec
&& dapm
->codec
->name_prefix
)
2477 name_len
+= 1 + strlen(dapm
->codec
->name_prefix
);
2478 w
->name
= kmalloc(name_len
, GFP_KERNEL
);
2479 if (w
->name
== NULL
) {
2483 if (dapm
->codec
&& dapm
->codec
->name_prefix
)
2484 snprintf(w
->name
, name_len
, "%s %s",
2485 dapm
->codec
->name_prefix
, widget
->name
);
2487 snprintf(w
->name
, name_len
, "%s", widget
->name
);
2491 w
->codec
= dapm
->codec
;
2492 INIT_LIST_HEAD(&w
->sources
);
2493 INIT_LIST_HEAD(&w
->sinks
);
2494 INIT_LIST_HEAD(&w
->list
);
2495 list_add(&w
->list
, &dapm
->card
->widgets
);
2497 /* machine layer set ups unconnected pins and insertions */
2501 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control
);
2504 * snd_soc_dapm_new_controls - create new dapm controls
2505 * @dapm: DAPM context
2506 * @widget: widget array
2507 * @num: number of widgets
2509 * Creates new DAPM controls based upon the templates.
2511 * Returns 0 for success else error.
2513 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context
*dapm
,
2514 const struct snd_soc_dapm_widget
*widget
,
2519 for (i
= 0; i
< num
; i
++) {
2520 ret
= snd_soc_dapm_new_control(dapm
, widget
);
2523 "ASoC: Failed to create DAPM control %s: %d\n",
2531 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls
);
2533 static void soc_dapm_stream_event(struct snd_soc_dapm_context
*dapm
,
2534 const char *stream
, int event
)
2536 struct snd_soc_dapm_widget
*w
;
2538 list_for_each_entry(w
, &dapm
->card
->widgets
, list
)
2540 if (!w
->sname
|| w
->dapm
!= dapm
)
2542 dev_dbg(w
->dapm
->dev
, "widget %s\n %s stream %s event %d\n",
2543 w
->name
, w
->sname
, stream
, event
);
2544 if (strstr(w
->sname
, stream
)) {
2546 case SND_SOC_DAPM_STREAM_START
:
2549 case SND_SOC_DAPM_STREAM_STOP
:
2552 case SND_SOC_DAPM_STREAM_SUSPEND
:
2553 case SND_SOC_DAPM_STREAM_RESUME
:
2554 case SND_SOC_DAPM_STREAM_PAUSE_PUSH
:
2555 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE
:
2561 dapm_power_widgets(dapm
, event
);
2565 * snd_soc_dapm_stream_event - send a stream event to the dapm core
2566 * @rtd: PCM runtime data
2567 * @stream: stream name
2568 * @event: stream event
2570 * Sends a stream event to the dapm core. The core then makes any
2571 * necessary widget power changes.
2573 * Returns 0 for success else error.
2575 int snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime
*rtd
,
2576 const char *stream
, int event
)
2578 struct snd_soc_codec
*codec
= rtd
->codec
;
2583 mutex_lock(&codec
->mutex
);
2584 soc_dapm_stream_event(&codec
->dapm
, stream
, event
);
2585 mutex_unlock(&codec
->mutex
);
2590 * snd_soc_dapm_enable_pin - enable pin.
2591 * @dapm: DAPM context
2594 * Enables input/output pin and its parents or children widgets iff there is
2595 * a valid audio route and active audio stream.
2596 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2597 * do any widget power switching.
2599 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context
*dapm
, const char *pin
)
2601 return snd_soc_dapm_set_pin(dapm
, pin
, 1);
2603 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin
);
2606 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
2607 * @dapm: DAPM context
2610 * Enables input/output pin regardless of any other state. This is
2611 * intended for use with microphone bias supplies used in microphone
2614 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2615 * do any widget power switching.
2617 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context
*dapm
,
2620 struct snd_soc_dapm_widget
*w
= dapm_find_widget(dapm
, pin
, true);
2623 dev_err(dapm
->dev
, "dapm: unknown pin %s\n", pin
);
2627 dev_dbg(w
->dapm
->dev
, "dapm: force enable pin %s\n", pin
);
2633 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin
);
2636 * snd_soc_dapm_disable_pin - disable pin.
2637 * @dapm: DAPM context
2640 * Disables input/output pin and its parents or children widgets.
2641 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2642 * do any widget power switching.
2644 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context
*dapm
,
2647 return snd_soc_dapm_set_pin(dapm
, pin
, 0);
2649 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin
);
2652 * snd_soc_dapm_nc_pin - permanently disable pin.
2653 * @dapm: DAPM context
2656 * Marks the specified pin as being not connected, disabling it along
2657 * any parent or child widgets. At present this is identical to
2658 * snd_soc_dapm_disable_pin() but in future it will be extended to do
2659 * additional things such as disabling controls which only affect
2660 * paths through the pin.
2662 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2663 * do any widget power switching.
2665 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context
*dapm
, const char *pin
)
2667 return snd_soc_dapm_set_pin(dapm
, pin
, 0);
2669 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin
);
2672 * snd_soc_dapm_get_pin_status - get audio pin status
2673 * @dapm: DAPM context
2674 * @pin: audio signal pin endpoint (or start point)
2676 * Get audio pin status - connected or disconnected.
2678 * Returns 1 for connected otherwise 0.
2680 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context
*dapm
,
2683 struct snd_soc_dapm_widget
*w
= dapm_find_widget(dapm
, pin
, true);
2686 return w
->connected
;
2690 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status
);
2693 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
2694 * @dapm: DAPM context
2695 * @pin: audio signal pin endpoint (or start point)
2697 * Mark the given endpoint or pin as ignoring suspend. When the
2698 * system is disabled a path between two endpoints flagged as ignoring
2699 * suspend will not be disabled. The path must already be enabled via
2700 * normal means at suspend time, it will not be turned on if it was not
2703 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context
*dapm
,
2706 struct snd_soc_dapm_widget
*w
= dapm_find_widget(dapm
, pin
, false);
2709 dev_err(dapm
->dev
, "dapm: unknown pin %s\n", pin
);
2713 w
->ignore_suspend
= 1;
2717 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend
);
2720 * snd_soc_dapm_free - free dapm resources
2723 * Free all dapm widgets and resources.
2725 void snd_soc_dapm_free(struct snd_soc_dapm_context
*dapm
)
2727 snd_soc_dapm_sys_remove(dapm
->dev
);
2728 dapm_debugfs_cleanup(dapm
);
2729 dapm_free_widgets(dapm
);
2730 list_del(&dapm
->list
);
2732 EXPORT_SYMBOL_GPL(snd_soc_dapm_free
);
2734 static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context
*dapm
)
2736 struct snd_soc_dapm_widget
*w
;
2737 LIST_HEAD(down_list
);
2740 list_for_each_entry(w
, &dapm
->card
->widgets
, list
) {
2741 if (w
->dapm
!= dapm
)
2744 dapm_seq_insert(w
, &down_list
, false);
2750 /* If there were no widgets to power down we're already in
2754 snd_soc_dapm_set_bias_level(dapm
, SND_SOC_BIAS_PREPARE
);
2755 dapm_seq_run(dapm
, &down_list
, 0, false);
2756 snd_soc_dapm_set_bias_level(dapm
, SND_SOC_BIAS_STANDBY
);
2761 * snd_soc_dapm_shutdown - callback for system shutdown
2763 void snd_soc_dapm_shutdown(struct snd_soc_card
*card
)
2765 struct snd_soc_codec
*codec
;
2767 list_for_each_entry(codec
, &card
->codec_dev_list
, list
) {
2768 soc_dapm_shutdown_codec(&codec
->dapm
);
2769 snd_soc_dapm_set_bias_level(&codec
->dapm
, SND_SOC_BIAS_OFF
);
2773 /* Module information */
2774 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2775 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
2776 MODULE_LICENSE("GPL");