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 #define DAPM_UPDATE_STAT(widget, val) widget->dapm->card->dapm_stats.val++;
53 /* dapm power sequences - make this per codec in the future */
54 static int dapm_up_seq
[] = {
55 [snd_soc_dapm_pre
] = 0,
56 [snd_soc_dapm_supply
] = 1,
57 [snd_soc_dapm_micbias
] = 2,
58 [snd_soc_dapm_aif_in
] = 3,
59 [snd_soc_dapm_aif_out
] = 3,
60 [snd_soc_dapm_mic
] = 4,
61 [snd_soc_dapm_mux
] = 5,
62 [snd_soc_dapm_virt_mux
] = 5,
63 [snd_soc_dapm_value_mux
] = 5,
64 [snd_soc_dapm_dac
] = 6,
65 [snd_soc_dapm_mixer
] = 7,
66 [snd_soc_dapm_mixer_named_ctl
] = 7,
67 [snd_soc_dapm_pga
] = 8,
68 [snd_soc_dapm_adc
] = 9,
69 [snd_soc_dapm_out_drv
] = 10,
70 [snd_soc_dapm_hp
] = 10,
71 [snd_soc_dapm_spk
] = 10,
72 [snd_soc_dapm_post
] = 11,
75 static int dapm_down_seq
[] = {
76 [snd_soc_dapm_pre
] = 0,
77 [snd_soc_dapm_adc
] = 1,
78 [snd_soc_dapm_hp
] = 2,
79 [snd_soc_dapm_spk
] = 2,
80 [snd_soc_dapm_out_drv
] = 2,
81 [snd_soc_dapm_pga
] = 4,
82 [snd_soc_dapm_mixer_named_ctl
] = 5,
83 [snd_soc_dapm_mixer
] = 5,
84 [snd_soc_dapm_dac
] = 6,
85 [snd_soc_dapm_mic
] = 7,
86 [snd_soc_dapm_micbias
] = 8,
87 [snd_soc_dapm_mux
] = 9,
88 [snd_soc_dapm_virt_mux
] = 9,
89 [snd_soc_dapm_value_mux
] = 9,
90 [snd_soc_dapm_aif_in
] = 10,
91 [snd_soc_dapm_aif_out
] = 10,
92 [snd_soc_dapm_supply
] = 11,
93 [snd_soc_dapm_post
] = 12,
96 static void pop_wait(u32 pop_time
)
99 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time
));
102 static void pop_dbg(struct device
*dev
, u32 pop_time
, const char *fmt
, ...)
110 buf
= kmalloc(PAGE_SIZE
, GFP_KERNEL
);
115 vsnprintf(buf
, PAGE_SIZE
, fmt
, args
);
116 dev_info(dev
, "%s", buf
);
122 /* create a new dapm widget */
123 static inline struct snd_soc_dapm_widget
*dapm_cnew_widget(
124 const struct snd_soc_dapm_widget
*_widget
)
126 return kmemdup(_widget
, sizeof(*_widget
), GFP_KERNEL
);
129 /* get snd_card from DAPM context */
130 static inline struct snd_card
*dapm_get_snd_card(
131 struct snd_soc_dapm_context
*dapm
)
134 return dapm
->codec
->card
->snd_card
;
135 else if (dapm
->platform
)
136 return dapm
->platform
->card
->snd_card
;
144 /* get soc_card from DAPM context */
145 static inline struct snd_soc_card
*dapm_get_soc_card(
146 struct snd_soc_dapm_context
*dapm
)
149 return dapm
->codec
->card
;
150 else if (dapm
->platform
)
151 return dapm
->platform
->card
;
159 static int soc_widget_read(struct snd_soc_dapm_widget
*w
, int reg
)
162 return snd_soc_read(w
->codec
, reg
);
163 else if (w
->platform
)
164 return snd_soc_platform_read(w
->platform
, reg
);
166 dev_err(w
->dapm
->dev
, "no valid widget read method\n");
170 static int soc_widget_write(struct snd_soc_dapm_widget
*w
, int reg
, int val
)
173 return snd_soc_write(w
->codec
, reg
, val
);
174 else if (w
->platform
)
175 return snd_soc_platform_write(w
->platform
, reg
, val
);
177 dev_err(w
->dapm
->dev
, "no valid widget write method\n");
181 static int soc_widget_update_bits(struct snd_soc_dapm_widget
*w
,
182 unsigned short reg
, unsigned int mask
, unsigned int value
)
185 unsigned int old
, new;
188 ret
= soc_widget_read(w
, reg
);
193 new = (old
& ~mask
) | (value
& mask
);
196 ret
= soc_widget_write(w
, reg
, new);
205 * snd_soc_dapm_set_bias_level - set the bias level for the system
206 * @dapm: DAPM context
207 * @level: level to configure
209 * Configure the bias (power) levels for the SoC audio device.
211 * Returns 0 for success else error.
213 static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context
*dapm
,
214 enum snd_soc_bias_level level
)
216 struct snd_soc_card
*card
= dapm
->card
;
219 trace_snd_soc_bias_level_start(card
, level
);
221 if (card
&& card
->set_bias_level
)
222 ret
= card
->set_bias_level(card
, dapm
, level
);
227 if (dapm
->codec
->driver
->set_bias_level
)
228 ret
= dapm
->codec
->driver
->set_bias_level(dapm
->codec
,
231 dapm
->bias_level
= level
;
236 if (card
&& card
->set_bias_level_post
)
237 ret
= card
->set_bias_level_post(card
, dapm
, level
);
239 trace_snd_soc_bias_level_done(card
, level
);
244 /* set up initial codec paths */
245 static void dapm_set_path_status(struct snd_soc_dapm_widget
*w
,
246 struct snd_soc_dapm_path
*p
, int i
)
249 case snd_soc_dapm_switch
:
250 case snd_soc_dapm_mixer
:
251 case snd_soc_dapm_mixer_named_ctl
: {
253 struct soc_mixer_control
*mc
= (struct soc_mixer_control
*)
254 w
->kcontrol_news
[i
].private_value
;
255 unsigned int reg
= mc
->reg
;
256 unsigned int shift
= mc
->shift
;
258 unsigned int mask
= (1 << fls(max
)) - 1;
259 unsigned int invert
= mc
->invert
;
261 val
= soc_widget_read(w
, reg
);
262 val
= (val
>> shift
) & mask
;
264 if ((invert
&& !val
) || (!invert
&& val
))
270 case snd_soc_dapm_mux
: {
271 struct soc_enum
*e
= (struct soc_enum
*)
272 w
->kcontrol_news
[i
].private_value
;
273 int val
, item
, bitmask
;
275 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
277 val
= soc_widget_read(w
, e
->reg
);
278 item
= (val
>> e
->shift_l
) & (bitmask
- 1);
281 for (i
= 0; i
< e
->max
; i
++) {
282 if (!(strcmp(p
->name
, e
->texts
[i
])) && item
== i
)
287 case snd_soc_dapm_virt_mux
: {
288 struct soc_enum
*e
= (struct soc_enum
*)
289 w
->kcontrol_news
[i
].private_value
;
292 /* since a virtual mux has no backing registers to
293 * decide which path to connect, it will try to match
294 * with the first enumeration. This is to ensure
295 * that the default mux choice (the first) will be
296 * correctly powered up during initialization.
298 if (!strcmp(p
->name
, e
->texts
[0]))
302 case snd_soc_dapm_value_mux
: {
303 struct soc_enum
*e
= (struct soc_enum
*)
304 w
->kcontrol_news
[i
].private_value
;
307 val
= soc_widget_read(w
, e
->reg
);
308 val
= (val
>> e
->shift_l
) & e
->mask
;
309 for (item
= 0; item
< e
->max
; item
++) {
310 if (val
== e
->values
[item
])
315 for (i
= 0; i
< e
->max
; i
++) {
316 if (!(strcmp(p
->name
, e
->texts
[i
])) && item
== i
)
321 /* does not effect routing - always connected */
322 case snd_soc_dapm_pga
:
323 case snd_soc_dapm_out_drv
:
324 case snd_soc_dapm_output
:
325 case snd_soc_dapm_adc
:
326 case snd_soc_dapm_input
:
327 case snd_soc_dapm_dac
:
328 case snd_soc_dapm_micbias
:
329 case snd_soc_dapm_vmid
:
330 case snd_soc_dapm_supply
:
331 case snd_soc_dapm_aif_in
:
332 case snd_soc_dapm_aif_out
:
335 /* does effect routing - dynamically connected */
336 case snd_soc_dapm_hp
:
337 case snd_soc_dapm_mic
:
338 case snd_soc_dapm_spk
:
339 case snd_soc_dapm_line
:
340 case snd_soc_dapm_pre
:
341 case snd_soc_dapm_post
:
347 /* connect mux widget to its interconnecting audio paths */
348 static int dapm_connect_mux(struct snd_soc_dapm_context
*dapm
,
349 struct snd_soc_dapm_widget
*src
, struct snd_soc_dapm_widget
*dest
,
350 struct snd_soc_dapm_path
*path
, const char *control_name
,
351 const struct snd_kcontrol_new
*kcontrol
)
353 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
356 for (i
= 0; i
< e
->max
; i
++) {
357 if (!(strcmp(control_name
, e
->texts
[i
]))) {
358 list_add(&path
->list
, &dapm
->card
->paths
);
359 list_add(&path
->list_sink
, &dest
->sources
);
360 list_add(&path
->list_source
, &src
->sinks
);
361 path
->name
= (char*)e
->texts
[i
];
362 dapm_set_path_status(dest
, path
, 0);
370 /* connect mixer widget to its interconnecting audio paths */
371 static int dapm_connect_mixer(struct snd_soc_dapm_context
*dapm
,
372 struct snd_soc_dapm_widget
*src
, struct snd_soc_dapm_widget
*dest
,
373 struct snd_soc_dapm_path
*path
, const char *control_name
)
377 /* search for mixer kcontrol */
378 for (i
= 0; i
< dest
->num_kcontrols
; i
++) {
379 if (!strcmp(control_name
, dest
->kcontrol_news
[i
].name
)) {
380 list_add(&path
->list
, &dapm
->card
->paths
);
381 list_add(&path
->list_sink
, &dest
->sources
);
382 list_add(&path
->list_source
, &src
->sinks
);
383 path
->name
= dest
->kcontrol_news
[i
].name
;
384 dapm_set_path_status(dest
, path
, i
);
391 static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context
*dapm
,
392 struct snd_soc_dapm_widget
*kcontrolw
,
393 const struct snd_kcontrol_new
*kcontrol_new
,
394 struct snd_kcontrol
**kcontrol
)
396 struct snd_soc_dapm_widget
*w
;
401 list_for_each_entry(w
, &dapm
->card
->widgets
, list
) {
402 if (w
== kcontrolw
|| w
->dapm
!= kcontrolw
->dapm
)
404 for (i
= 0; i
< w
->num_kcontrols
; i
++) {
405 if (&w
->kcontrol_news
[i
] == kcontrol_new
) {
407 *kcontrol
= w
->kcontrols
[i
];
416 /* create new dapm mixer control */
417 static int dapm_new_mixer(struct snd_soc_dapm_widget
*w
)
419 struct snd_soc_dapm_context
*dapm
= w
->dapm
;
421 size_t name_len
, prefix_len
;
422 struct snd_soc_dapm_path
*path
;
423 struct snd_card
*card
= dapm
->card
->snd_card
;
425 struct snd_soc_dapm_widget_list
*wlist
;
429 prefix
= dapm
->codec
->name_prefix
;
434 prefix_len
= strlen(prefix
) + 1;
439 for (i
= 0; i
< w
->num_kcontrols
; i
++) {
442 list_for_each_entry(path
, &w
->sources
, list_sink
) {
444 /* mixer/mux paths name must match control name */
445 if (path
->name
!= (char *)w
->kcontrol_news
[i
].name
)
448 if (w
->kcontrols
[i
]) {
449 path
->kcontrol
= w
->kcontrols
[i
];
453 wlistsize
= sizeof(struct snd_soc_dapm_widget_list
) +
454 sizeof(struct snd_soc_dapm_widget
*),
455 wlist
= kzalloc(wlistsize
, GFP_KERNEL
);
458 "asoc: can't allocate widget list for %s\n",
462 wlist
->num_widgets
= 1;
463 wlist
->widgets
[0] = w
;
465 /* add dapm control with long name.
466 * for dapm_mixer this is the concatenation of the
467 * mixer and kcontrol name.
468 * for dapm_mixer_named_ctl this is simply the
471 name_len
= strlen(w
->kcontrol_news
[i
].name
) + 1;
472 if (w
->id
!= snd_soc_dapm_mixer_named_ctl
)
473 name_len
+= 1 + strlen(w
->name
);
475 path
->long_name
= kmalloc(name_len
, GFP_KERNEL
);
477 if (path
->long_name
== NULL
) {
484 /* The control will get a prefix from
485 * the control creation process but
486 * we're also using the same prefix
487 * for widgets so cut the prefix off
488 * the front of the widget name.
490 snprintf(path
->long_name
, name_len
, "%s %s",
491 w
->name
+ prefix_len
,
492 w
->kcontrol_news
[i
].name
);
494 case snd_soc_dapm_mixer_named_ctl
:
495 snprintf(path
->long_name
, name_len
, "%s",
496 w
->kcontrol_news
[i
].name
);
500 path
->long_name
[name_len
- 1] = '\0';
502 path
->kcontrol
= snd_soc_cnew(&w
->kcontrol_news
[i
],
503 wlist
, path
->long_name
,
505 ret
= snd_ctl_add(card
, path
->kcontrol
);
508 "asoc: failed to add dapm kcontrol %s: %d\n",
509 path
->long_name
, ret
);
511 kfree(path
->long_name
);
512 path
->long_name
= NULL
;
515 w
->kcontrols
[i
] = path
->kcontrol
;
521 /* create new dapm mux control */
522 static int dapm_new_mux(struct snd_soc_dapm_widget
*w
)
524 struct snd_soc_dapm_context
*dapm
= w
->dapm
;
525 struct snd_soc_dapm_path
*path
= NULL
;
526 struct snd_kcontrol
*kcontrol
;
527 struct snd_card
*card
= dapm
->card
->snd_card
;
531 struct snd_soc_dapm_widget_list
*wlist
;
532 int shared
, wlistentries
;
536 if (w
->num_kcontrols
!= 1) {
538 "asoc: mux %s has incorrect number of controls\n",
543 shared
= dapm_is_shared_kcontrol(dapm
, w
, &w
->kcontrol_news
[0],
546 wlist
= kcontrol
->private_data
;
547 wlistentries
= wlist
->num_widgets
+ 1;
552 wlistsize
= sizeof(struct snd_soc_dapm_widget_list
) +
553 wlistentries
* sizeof(struct snd_soc_dapm_widget
*),
554 wlist
= krealloc(wlist
, wlistsize
, GFP_KERNEL
);
557 "asoc: can't allocate widget list for %s\n", w
->name
);
560 wlist
->num_widgets
= wlistentries
;
561 wlist
->widgets
[wlistentries
- 1] = w
;
565 prefix
= dapm
->codec
->name_prefix
;
570 name
= w
->kcontrol_news
[0].name
;
575 prefix_len
= strlen(prefix
) + 1;
581 * The control will get a prefix from the control creation
582 * process but we're also using the same prefix for widgets so
583 * cut the prefix off the front of the widget name.
585 kcontrol
= snd_soc_cnew(&w
->kcontrol_news
[0], wlist
,
586 name
+ prefix_len
, prefix
);
587 ret
= snd_ctl_add(card
, kcontrol
);
589 dev_err(dapm
->dev
, "failed to add kcontrol %s: %d\n",
596 kcontrol
->private_data
= wlist
;
598 w
->kcontrols
[0] = kcontrol
;
600 list_for_each_entry(path
, &w
->sources
, list_sink
)
601 path
->kcontrol
= kcontrol
;
606 /* create new dapm volume control */
607 static int dapm_new_pga(struct snd_soc_dapm_widget
*w
)
609 if (w
->num_kcontrols
)
610 dev_err(w
->dapm
->dev
,
611 "asoc: PGA controls not supported: '%s'\n", w
->name
);
616 /* reset 'walked' bit for each dapm path */
617 static inline void dapm_clear_walk(struct snd_soc_dapm_context
*dapm
)
619 struct snd_soc_dapm_path
*p
;
621 list_for_each_entry(p
, &dapm
->card
->paths
, list
)
625 /* We implement power down on suspend by checking the power state of
626 * the ALSA card - when we are suspending the ALSA state for the card
629 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget
*widget
)
631 int level
= snd_power_get_state(widget
->dapm
->card
->snd_card
);
634 case SNDRV_CTL_POWER_D3hot
:
635 case SNDRV_CTL_POWER_D3cold
:
636 if (widget
->ignore_suspend
)
637 dev_dbg(widget
->dapm
->dev
, "%s ignoring suspend\n",
639 return widget
->ignore_suspend
;
646 * Recursively check for a completed path to an active or physically connected
647 * output widget. Returns number of complete paths.
649 static int is_connected_output_ep(struct snd_soc_dapm_widget
*widget
)
651 struct snd_soc_dapm_path
*path
;
654 DAPM_UPDATE_STAT(widget
, path_checks
);
656 if (widget
->id
== snd_soc_dapm_supply
)
659 switch (widget
->id
) {
660 case snd_soc_dapm_adc
:
661 case snd_soc_dapm_aif_out
:
663 return snd_soc_dapm_suspend_check(widget
);
668 if (widget
->connected
) {
669 /* connected pin ? */
670 if (widget
->id
== snd_soc_dapm_output
&& !widget
->ext
)
671 return snd_soc_dapm_suspend_check(widget
);
673 /* connected jack or spk ? */
674 if (widget
->id
== snd_soc_dapm_hp
|| widget
->id
== snd_soc_dapm_spk
||
675 (widget
->id
== snd_soc_dapm_line
&& !list_empty(&widget
->sources
)))
676 return snd_soc_dapm_suspend_check(widget
);
679 list_for_each_entry(path
, &widget
->sinks
, list_source
) {
680 DAPM_UPDATE_STAT(widget
, neighbour_checks
);
688 if (path
->sink
&& path
->connect
) {
690 con
+= is_connected_output_ep(path
->sink
);
698 * Recursively check for a completed path to an active or physically connected
699 * input widget. Returns number of complete paths.
701 static int is_connected_input_ep(struct snd_soc_dapm_widget
*widget
)
703 struct snd_soc_dapm_path
*path
;
706 DAPM_UPDATE_STAT(widget
, path_checks
);
708 if (widget
->id
== snd_soc_dapm_supply
)
711 /* active stream ? */
712 switch (widget
->id
) {
713 case snd_soc_dapm_dac
:
714 case snd_soc_dapm_aif_in
:
716 return snd_soc_dapm_suspend_check(widget
);
721 if (widget
->connected
) {
722 /* connected pin ? */
723 if (widget
->id
== snd_soc_dapm_input
&& !widget
->ext
)
724 return snd_soc_dapm_suspend_check(widget
);
726 /* connected VMID/Bias for lower pops */
727 if (widget
->id
== snd_soc_dapm_vmid
)
728 return snd_soc_dapm_suspend_check(widget
);
730 /* connected jack ? */
731 if (widget
->id
== snd_soc_dapm_mic
||
732 (widget
->id
== snd_soc_dapm_line
&& !list_empty(&widget
->sinks
)))
733 return snd_soc_dapm_suspend_check(widget
);
736 list_for_each_entry(path
, &widget
->sources
, list_sink
) {
737 DAPM_UPDATE_STAT(widget
, neighbour_checks
);
745 if (path
->source
&& path
->connect
) {
747 con
+= is_connected_input_ep(path
->source
);
755 * Handler for generic register modifier widget.
757 int dapm_reg_event(struct snd_soc_dapm_widget
*w
,
758 struct snd_kcontrol
*kcontrol
, int event
)
762 if (SND_SOC_DAPM_EVENT_ON(event
))
767 soc_widget_update_bits(w
, -(w
->reg
+ 1),
768 w
->mask
<< w
->shift
, val
<< w
->shift
);
772 EXPORT_SYMBOL_GPL(dapm_reg_event
);
774 /* Generic check to see if a widget should be powered.
776 static int dapm_generic_check_power(struct snd_soc_dapm_widget
*w
)
780 DAPM_UPDATE_STAT(w
, power_checks
);
782 in
= is_connected_input_ep(w
);
783 dapm_clear_walk(w
->dapm
);
784 out
= is_connected_output_ep(w
);
785 dapm_clear_walk(w
->dapm
);
786 return out
!= 0 && in
!= 0;
789 /* Check to see if an ADC has power */
790 static int dapm_adc_check_power(struct snd_soc_dapm_widget
*w
)
794 DAPM_UPDATE_STAT(w
, power_checks
);
797 in
= is_connected_input_ep(w
);
798 dapm_clear_walk(w
->dapm
);
801 return dapm_generic_check_power(w
);
805 /* Check to see if a DAC has power */
806 static int dapm_dac_check_power(struct snd_soc_dapm_widget
*w
)
810 DAPM_UPDATE_STAT(w
, power_checks
);
813 out
= is_connected_output_ep(w
);
814 dapm_clear_walk(w
->dapm
);
817 return dapm_generic_check_power(w
);
821 /* Check to see if a power supply is needed */
822 static int dapm_supply_check_power(struct snd_soc_dapm_widget
*w
)
824 struct snd_soc_dapm_path
*path
;
827 DAPM_UPDATE_STAT(w
, power_checks
);
829 /* Check if one of our outputs is connected */
830 list_for_each_entry(path
, &w
->sinks
, list_source
) {
834 if (path
->connected
&&
835 !path
->connected(path
->source
, path
->sink
))
841 if (path
->sink
->force
) {
846 if (path
->sink
->power_check
&&
847 path
->sink
->power_check(path
->sink
)) {
853 dapm_clear_walk(w
->dapm
);
858 static int dapm_seq_compare(struct snd_soc_dapm_widget
*a
,
859 struct snd_soc_dapm_widget
*b
,
867 sort
= dapm_down_seq
;
869 if (sort
[a
->id
] != sort
[b
->id
])
870 return sort
[a
->id
] - sort
[b
->id
];
871 if (a
->subseq
!= b
->subseq
) {
873 return a
->subseq
- b
->subseq
;
875 return b
->subseq
- a
->subseq
;
877 if (a
->reg
!= b
->reg
)
878 return a
->reg
- b
->reg
;
879 if (a
->dapm
!= b
->dapm
)
880 return (unsigned long)a
->dapm
- (unsigned long)b
->dapm
;
885 /* Insert a widget in order into a DAPM power sequence. */
886 static void dapm_seq_insert(struct snd_soc_dapm_widget
*new_widget
,
887 struct list_head
*list
,
890 struct snd_soc_dapm_widget
*w
;
892 list_for_each_entry(w
, list
, power_list
)
893 if (dapm_seq_compare(new_widget
, w
, power_up
) < 0) {
894 list_add_tail(&new_widget
->power_list
, &w
->power_list
);
898 list_add_tail(&new_widget
->power_list
, list
);
901 static void dapm_seq_check_event(struct snd_soc_dapm_context
*dapm
,
902 struct snd_soc_dapm_widget
*w
, int event
)
904 struct snd_soc_card
*card
= dapm
->card
;
909 case SND_SOC_DAPM_PRE_PMU
:
913 case SND_SOC_DAPM_POST_PMU
:
914 ev_name
= "POST_PMU";
917 case SND_SOC_DAPM_PRE_PMD
:
921 case SND_SOC_DAPM_POST_PMD
:
922 ev_name
= "POST_PMD";
930 if (w
->power
!= power
)
933 if (w
->event
&& (w
->event_flags
& event
)) {
934 pop_dbg(dapm
->dev
, card
->pop_time
, "pop test : %s %s\n",
936 trace_snd_soc_dapm_widget_event_start(w
, event
);
937 ret
= w
->event(w
, NULL
, event
);
938 trace_snd_soc_dapm_widget_event_done(w
, event
);
940 pr_err("%s: %s event failed: %d\n",
941 ev_name
, w
->name
, ret
);
945 /* Apply the coalesced changes from a DAPM sequence */
946 static void dapm_seq_run_coalesced(struct snd_soc_dapm_context
*dapm
,
947 struct list_head
*pending
)
949 struct snd_soc_card
*card
= dapm
->card
;
950 struct snd_soc_dapm_widget
*w
;
952 unsigned int value
= 0;
953 unsigned int mask
= 0;
954 unsigned int cur_mask
;
956 reg
= list_first_entry(pending
, struct snd_soc_dapm_widget
,
959 list_for_each_entry(w
, pending
, power_list
) {
960 cur_mask
= 1 << w
->shift
;
961 BUG_ON(reg
!= w
->reg
);
972 pop_dbg(dapm
->dev
, card
->pop_time
,
973 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
974 w
->name
, reg
, value
, mask
);
976 /* Check for events */
977 dapm_seq_check_event(dapm
, w
, SND_SOC_DAPM_PRE_PMU
);
978 dapm_seq_check_event(dapm
, w
, SND_SOC_DAPM_PRE_PMD
);
982 /* Any widget will do, they should all be updating the
985 w
= list_first_entry(pending
, struct snd_soc_dapm_widget
,
988 pop_dbg(dapm
->dev
, card
->pop_time
,
989 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
990 value
, mask
, reg
, card
->pop_time
);
991 pop_wait(card
->pop_time
);
992 soc_widget_update_bits(w
, reg
, mask
, value
);
995 list_for_each_entry(w
, pending
, power_list
) {
996 dapm_seq_check_event(dapm
, w
, SND_SOC_DAPM_POST_PMU
);
997 dapm_seq_check_event(dapm
, w
, SND_SOC_DAPM_POST_PMD
);
1001 /* Apply a DAPM power sequence.
1003 * We walk over a pre-sorted list of widgets to apply power to. In
1004 * order to minimise the number of writes to the device required
1005 * multiple widgets will be updated in a single write where possible.
1006 * Currently anything that requires more than a single write is not
1009 static void dapm_seq_run(struct snd_soc_dapm_context
*dapm
,
1010 struct list_head
*list
, int event
, bool power_up
)
1012 struct snd_soc_dapm_widget
*w
, *n
;
1015 int cur_subseq
= -1;
1016 int cur_reg
= SND_SOC_NOPM
;
1017 struct snd_soc_dapm_context
*cur_dapm
= NULL
;
1024 sort
= dapm_down_seq
;
1026 list_for_each_entry_safe(w
, n
, list
, power_list
) {
1029 /* Do we need to apply any queued changes? */
1030 if (sort
[w
->id
] != cur_sort
|| w
->reg
!= cur_reg
||
1031 w
->dapm
!= cur_dapm
|| w
->subseq
!= cur_subseq
) {
1032 if (!list_empty(&pending
))
1033 dapm_seq_run_coalesced(cur_dapm
, &pending
);
1035 if (cur_dapm
&& cur_dapm
->seq_notifier
) {
1036 for (i
= 0; i
< ARRAY_SIZE(dapm_up_seq
); i
++)
1037 if (sort
[i
] == cur_sort
)
1038 cur_dapm
->seq_notifier(cur_dapm
,
1043 INIT_LIST_HEAD(&pending
);
1045 cur_subseq
= INT_MIN
;
1046 cur_reg
= SND_SOC_NOPM
;
1051 case snd_soc_dapm_pre
:
1053 list_for_each_entry_safe_continue(w
, n
, list
,
1056 if (event
== SND_SOC_DAPM_STREAM_START
)
1058 NULL
, SND_SOC_DAPM_PRE_PMU
);
1059 else if (event
== SND_SOC_DAPM_STREAM_STOP
)
1061 NULL
, SND_SOC_DAPM_PRE_PMD
);
1064 case snd_soc_dapm_post
:
1066 list_for_each_entry_safe_continue(w
, n
, list
,
1069 if (event
== SND_SOC_DAPM_STREAM_START
)
1071 NULL
, SND_SOC_DAPM_POST_PMU
);
1072 else if (event
== SND_SOC_DAPM_STREAM_STOP
)
1074 NULL
, SND_SOC_DAPM_POST_PMD
);
1078 /* Queue it up for application */
1079 cur_sort
= sort
[w
->id
];
1080 cur_subseq
= w
->subseq
;
1083 list_move(&w
->power_list
, &pending
);
1088 dev_err(w
->dapm
->dev
,
1089 "Failed to apply widget power: %d\n", ret
);
1092 if (!list_empty(&pending
))
1093 dapm_seq_run_coalesced(cur_dapm
, &pending
);
1095 if (cur_dapm
&& cur_dapm
->seq_notifier
) {
1096 for (i
= 0; i
< ARRAY_SIZE(dapm_up_seq
); i
++)
1097 if (sort
[i
] == cur_sort
)
1098 cur_dapm
->seq_notifier(cur_dapm
,
1103 static void dapm_widget_update(struct snd_soc_dapm_context
*dapm
)
1105 struct snd_soc_dapm_update
*update
= dapm
->update
;
1106 struct snd_soc_dapm_widget
*w
;
1115 (w
->event_flags
& SND_SOC_DAPM_PRE_REG
)) {
1116 ret
= w
->event(w
, update
->kcontrol
, SND_SOC_DAPM_PRE_REG
);
1118 pr_err("%s DAPM pre-event failed: %d\n",
1122 ret
= snd_soc_update_bits(w
->codec
, update
->reg
, update
->mask
,
1125 pr_err("%s DAPM update failed: %d\n", w
->name
, ret
);
1128 (w
->event_flags
& SND_SOC_DAPM_POST_REG
)) {
1129 ret
= w
->event(w
, update
->kcontrol
, SND_SOC_DAPM_POST_REG
);
1131 pr_err("%s DAPM post-event failed: %d\n",
1136 /* Async callback run prior to DAPM sequences - brings to _PREPARE if
1137 * they're changing state.
1139 static void dapm_pre_sequence_async(void *data
, async_cookie_t cookie
)
1141 struct snd_soc_dapm_context
*d
= data
;
1144 /* If we're off and we're not supposed to be go into STANDBY */
1145 if (d
->bias_level
== SND_SOC_BIAS_OFF
&&
1146 d
->target_bias_level
!= SND_SOC_BIAS_OFF
) {
1147 ret
= snd_soc_dapm_set_bias_level(d
, SND_SOC_BIAS_STANDBY
);
1150 "Failed to turn on bias: %d\n", ret
);
1153 /* Prepare for a STADDBY->ON or ON->STANDBY transition */
1154 if (d
->bias_level
!= d
->target_bias_level
) {
1155 ret
= snd_soc_dapm_set_bias_level(d
, SND_SOC_BIAS_PREPARE
);
1158 "Failed to prepare bias: %d\n", ret
);
1162 /* Async callback run prior to DAPM sequences - brings to their final
1165 static void dapm_post_sequence_async(void *data
, async_cookie_t cookie
)
1167 struct snd_soc_dapm_context
*d
= data
;
1170 /* If we just powered the last thing off drop to standby bias */
1171 if (d
->bias_level
== SND_SOC_BIAS_PREPARE
&&
1172 (d
->target_bias_level
== SND_SOC_BIAS_STANDBY
||
1173 d
->target_bias_level
== SND_SOC_BIAS_OFF
)) {
1174 ret
= snd_soc_dapm_set_bias_level(d
, SND_SOC_BIAS_STANDBY
);
1176 dev_err(d
->dev
, "Failed to apply standby bias: %d\n",
1180 /* If we're in standby and can support bias off then do that */
1181 if (d
->bias_level
== SND_SOC_BIAS_STANDBY
&&
1182 d
->target_bias_level
== SND_SOC_BIAS_OFF
) {
1183 ret
= snd_soc_dapm_set_bias_level(d
, SND_SOC_BIAS_OFF
);
1185 dev_err(d
->dev
, "Failed to turn off bias: %d\n", ret
);
1188 /* If we just powered up then move to active bias */
1189 if (d
->bias_level
== SND_SOC_BIAS_PREPARE
&&
1190 d
->target_bias_level
== SND_SOC_BIAS_ON
) {
1191 ret
= snd_soc_dapm_set_bias_level(d
, SND_SOC_BIAS_ON
);
1193 dev_err(d
->dev
, "Failed to apply active bias: %d\n",
1198 static void dapm_power_one_widget(struct snd_soc_dapm_widget
*w
,
1199 struct list_head
*up_list
,
1200 struct list_head
*down_list
)
1202 struct snd_soc_dapm_context
*d
;
1206 case snd_soc_dapm_pre
:
1207 dapm_seq_insert(w
, down_list
, false);
1209 case snd_soc_dapm_post
:
1210 dapm_seq_insert(w
, up_list
, true);
1214 if (!w
->power_check
)
1218 power
= w
->power_check(w
);
1225 /* Supplies and micbiases only bring the
1226 * context up to STANDBY as unless something
1227 * else is active and passing audio they
1228 * generally don't require full power.
1231 case snd_soc_dapm_supply
:
1232 case snd_soc_dapm_micbias
:
1233 if (d
->target_bias_level
< SND_SOC_BIAS_STANDBY
)
1234 d
->target_bias_level
= SND_SOC_BIAS_STANDBY
;
1237 d
->target_bias_level
= SND_SOC_BIAS_ON
;
1242 if (w
->power
== power
)
1245 trace_snd_soc_dapm_widget_power(w
, power
);
1248 dapm_seq_insert(w
, up_list
, true);
1250 dapm_seq_insert(w
, down_list
, false);
1258 * Scan each dapm widget for complete audio path.
1259 * A complete path is a route that has valid endpoints i.e.:-
1261 * o DAC to output pin.
1262 * o Input Pin to ADC.
1263 * o Input pin to Output pin (bypass, sidetone)
1264 * o DAC to ADC (loopback).
1266 static int dapm_power_widgets(struct snd_soc_dapm_context
*dapm
, int event
)
1268 struct snd_soc_card
*card
= dapm
->card
;
1269 struct snd_soc_dapm_widget
*w
;
1270 struct snd_soc_dapm_context
*d
;
1272 LIST_HEAD(down_list
);
1273 LIST_HEAD(async_domain
);
1274 enum snd_soc_bias_level bias
;
1276 trace_snd_soc_dapm_start(card
);
1278 list_for_each_entry(d
, &card
->dapm_list
, list
) {
1279 if (d
->n_widgets
|| d
->codec
== NULL
) {
1280 if (d
->idle_bias_off
)
1281 d
->target_bias_level
= SND_SOC_BIAS_OFF
;
1283 d
->target_bias_level
= SND_SOC_BIAS_STANDBY
;
1287 memset(&card
->dapm_stats
, 0, sizeof(card
->dapm_stats
));
1289 /* Check which widgets we need to power and store them in
1290 * lists indicating if they should be powered up or down.
1292 list_for_each_entry(w
, &card
->widgets
, list
) {
1293 dapm_power_one_widget(w
, &up_list
, &down_list
);
1296 /* If there are no DAPM widgets then try to figure out power from the
1299 if (!dapm
->n_widgets
) {
1301 case SND_SOC_DAPM_STREAM_START
:
1302 case SND_SOC_DAPM_STREAM_RESUME
:
1303 dapm
->target_bias_level
= SND_SOC_BIAS_ON
;
1305 case SND_SOC_DAPM_STREAM_STOP
:
1306 if (dapm
->codec
->active
)
1307 dapm
->target_bias_level
= SND_SOC_BIAS_ON
;
1309 dapm
->target_bias_level
= SND_SOC_BIAS_STANDBY
;
1311 case SND_SOC_DAPM_STREAM_SUSPEND
:
1312 dapm
->target_bias_level
= SND_SOC_BIAS_STANDBY
;
1314 case SND_SOC_DAPM_STREAM_NOP
:
1315 dapm
->target_bias_level
= dapm
->bias_level
;
1322 /* Force all contexts in the card to the same bias state if
1323 * they're not ground referenced.
1325 bias
= SND_SOC_BIAS_OFF
;
1326 list_for_each_entry(d
, &card
->dapm_list
, list
)
1327 if (d
->target_bias_level
> bias
)
1328 bias
= d
->target_bias_level
;
1329 list_for_each_entry(d
, &card
->dapm_list
, list
)
1330 if (!d
->idle_bias_off
)
1331 d
->target_bias_level
= bias
;
1333 trace_snd_soc_dapm_walk_done(card
);
1335 /* Run all the bias changes in parallel */
1336 list_for_each_entry(d
, &dapm
->card
->dapm_list
, list
)
1337 async_schedule_domain(dapm_pre_sequence_async
, d
,
1339 async_synchronize_full_domain(&async_domain
);
1341 /* Power down widgets first; try to avoid amplifying pops. */
1342 dapm_seq_run(dapm
, &down_list
, event
, false);
1344 dapm_widget_update(dapm
);
1347 dapm_seq_run(dapm
, &up_list
, event
, true);
1349 /* Run all the bias changes in parallel */
1350 list_for_each_entry(d
, &dapm
->card
->dapm_list
, list
)
1351 async_schedule_domain(dapm_post_sequence_async
, d
,
1353 async_synchronize_full_domain(&async_domain
);
1355 pop_dbg(dapm
->dev
, card
->pop_time
,
1356 "DAPM sequencing finished, waiting %dms\n", card
->pop_time
);
1357 pop_wait(card
->pop_time
);
1359 trace_snd_soc_dapm_done(card
);
1364 #ifdef CONFIG_DEBUG_FS
1365 static int dapm_widget_power_open_file(struct inode
*inode
, struct file
*file
)
1367 file
->private_data
= inode
->i_private
;
1371 static ssize_t
dapm_widget_power_read_file(struct file
*file
,
1372 char __user
*user_buf
,
1373 size_t count
, loff_t
*ppos
)
1375 struct snd_soc_dapm_widget
*w
= file
->private_data
;
1379 struct snd_soc_dapm_path
*p
= NULL
;
1381 buf
= kmalloc(PAGE_SIZE
, GFP_KERNEL
);
1385 in
= is_connected_input_ep(w
);
1386 dapm_clear_walk(w
->dapm
);
1387 out
= is_connected_output_ep(w
);
1388 dapm_clear_walk(w
->dapm
);
1390 ret
= snprintf(buf
, PAGE_SIZE
, "%s: %s in %d out %d",
1391 w
->name
, w
->power
? "On" : "Off", in
, out
);
1394 ret
+= snprintf(buf
+ ret
, PAGE_SIZE
- ret
,
1395 " - R%d(0x%x) bit %d",
1396 w
->reg
, w
->reg
, w
->shift
);
1398 ret
+= snprintf(buf
+ ret
, PAGE_SIZE
- ret
, "\n");
1401 ret
+= snprintf(buf
+ ret
, PAGE_SIZE
- ret
, " stream %s %s\n",
1403 w
->active
? "active" : "inactive");
1405 list_for_each_entry(p
, &w
->sources
, list_sink
) {
1406 if (p
->connected
&& !p
->connected(w
, p
->sink
))
1410 ret
+= snprintf(buf
+ ret
, PAGE_SIZE
- ret
,
1411 " in \"%s\" \"%s\"\n",
1412 p
->name
? p
->name
: "static",
1415 list_for_each_entry(p
, &w
->sinks
, list_source
) {
1416 if (p
->connected
&& !p
->connected(w
, p
->sink
))
1420 ret
+= snprintf(buf
+ ret
, PAGE_SIZE
- ret
,
1421 " out \"%s\" \"%s\"\n",
1422 p
->name
? p
->name
: "static",
1426 ret
= simple_read_from_buffer(user_buf
, count
, ppos
, buf
, ret
);
1432 static const struct file_operations dapm_widget_power_fops
= {
1433 .open
= dapm_widget_power_open_file
,
1434 .read
= dapm_widget_power_read_file
,
1435 .llseek
= default_llseek
,
1438 static int dapm_bias_open_file(struct inode
*inode
, struct file
*file
)
1440 file
->private_data
= inode
->i_private
;
1444 static ssize_t
dapm_bias_read_file(struct file
*file
, char __user
*user_buf
,
1445 size_t count
, loff_t
*ppos
)
1447 struct snd_soc_dapm_context
*dapm
= file
->private_data
;
1450 switch (dapm
->bias_level
) {
1451 case SND_SOC_BIAS_ON
:
1454 case SND_SOC_BIAS_PREPARE
:
1455 level
= "Prepare\n";
1457 case SND_SOC_BIAS_STANDBY
:
1458 level
= "Standby\n";
1460 case SND_SOC_BIAS_OFF
:
1465 level
= "Unknown\n";
1469 return simple_read_from_buffer(user_buf
, count
, ppos
, level
,
1473 static const struct file_operations dapm_bias_fops
= {
1474 .open
= dapm_bias_open_file
,
1475 .read
= dapm_bias_read_file
,
1476 .llseek
= default_llseek
,
1479 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context
*dapm
,
1480 struct dentry
*parent
)
1484 dapm
->debugfs_dapm
= debugfs_create_dir("dapm", parent
);
1486 if (!dapm
->debugfs_dapm
) {
1488 "Failed to create DAPM debugfs directory\n");
1492 d
= debugfs_create_file("bias_level", 0444,
1493 dapm
->debugfs_dapm
, dapm
,
1497 "ASoC: Failed to create bias level debugfs file\n");
1500 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget
*w
)
1502 struct snd_soc_dapm_context
*dapm
= w
->dapm
;
1505 if (!dapm
->debugfs_dapm
|| !w
->name
)
1508 d
= debugfs_create_file(w
->name
, 0444,
1509 dapm
->debugfs_dapm
, w
,
1510 &dapm_widget_power_fops
);
1512 dev_warn(w
->dapm
->dev
,
1513 "ASoC: Failed to create %s debugfs file\n",
1517 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context
*dapm
)
1519 debugfs_remove_recursive(dapm
->debugfs_dapm
);
1523 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context
*dapm
,
1524 struct dentry
*parent
)
1528 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget
*w
)
1532 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context
*dapm
)
1538 /* test and update the power status of a mux widget */
1539 static int dapm_mux_update_power(struct snd_soc_dapm_widget
*widget
,
1540 struct snd_kcontrol
*kcontrol
, int change
,
1541 int mux
, struct soc_enum
*e
)
1543 struct snd_soc_dapm_path
*path
;
1546 if (widget
->id
!= snd_soc_dapm_mux
&&
1547 widget
->id
!= snd_soc_dapm_virt_mux
&&
1548 widget
->id
!= snd_soc_dapm_value_mux
)
1554 /* find dapm widget path assoc with kcontrol */
1555 list_for_each_entry(path
, &widget
->dapm
->card
->paths
, list
) {
1556 if (path
->kcontrol
!= kcontrol
)
1559 if (!path
->name
|| !e
->texts
[mux
])
1563 /* we now need to match the string in the enum to the path */
1564 if (!(strcmp(path
->name
, e
->texts
[mux
])))
1565 path
->connect
= 1; /* new connection */
1567 path
->connect
= 0; /* old connection must be powered down */
1571 dapm_power_widgets(widget
->dapm
, SND_SOC_DAPM_STREAM_NOP
);
1576 /* test and update the power status of a mixer or switch widget */
1577 static int dapm_mixer_update_power(struct snd_soc_dapm_widget
*widget
,
1578 struct snd_kcontrol
*kcontrol
, int connect
)
1580 struct snd_soc_dapm_path
*path
;
1583 if (widget
->id
!= snd_soc_dapm_mixer
&&
1584 widget
->id
!= snd_soc_dapm_mixer_named_ctl
&&
1585 widget
->id
!= snd_soc_dapm_switch
)
1588 /* find dapm widget path assoc with kcontrol */
1589 list_for_each_entry(path
, &widget
->dapm
->card
->paths
, list
) {
1590 if (path
->kcontrol
!= kcontrol
)
1593 /* found, now check type */
1595 path
->connect
= connect
;
1599 dapm_power_widgets(widget
->dapm
, SND_SOC_DAPM_STREAM_NOP
);
1604 /* show dapm widget status in sys fs */
1605 static ssize_t
dapm_widget_show(struct device
*dev
,
1606 struct device_attribute
*attr
, char *buf
)
1608 struct snd_soc_pcm_runtime
*rtd
=
1609 container_of(dev
, struct snd_soc_pcm_runtime
, dev
);
1610 struct snd_soc_codec
*codec
=rtd
->codec
;
1611 struct snd_soc_dapm_widget
*w
;
1613 char *state
= "not set";
1615 list_for_each_entry(w
, &codec
->card
->widgets
, list
) {
1616 if (w
->dapm
!= &codec
->dapm
)
1619 /* only display widgets that burnm power */
1621 case snd_soc_dapm_hp
:
1622 case snd_soc_dapm_mic
:
1623 case snd_soc_dapm_spk
:
1624 case snd_soc_dapm_line
:
1625 case snd_soc_dapm_micbias
:
1626 case snd_soc_dapm_dac
:
1627 case snd_soc_dapm_adc
:
1628 case snd_soc_dapm_pga
:
1629 case snd_soc_dapm_out_drv
:
1630 case snd_soc_dapm_mixer
:
1631 case snd_soc_dapm_mixer_named_ctl
:
1632 case snd_soc_dapm_supply
:
1634 count
+= sprintf(buf
+ count
, "%s: %s\n",
1635 w
->name
, w
->power
? "On":"Off");
1642 switch (codec
->dapm
.bias_level
) {
1643 case SND_SOC_BIAS_ON
:
1646 case SND_SOC_BIAS_PREPARE
:
1649 case SND_SOC_BIAS_STANDBY
:
1652 case SND_SOC_BIAS_OFF
:
1656 count
+= sprintf(buf
+ count
, "PM State: %s\n", state
);
1661 static DEVICE_ATTR(dapm_widget
, 0444, dapm_widget_show
, NULL
);
1663 int snd_soc_dapm_sys_add(struct device
*dev
)
1665 return device_create_file(dev
, &dev_attr_dapm_widget
);
1668 static void snd_soc_dapm_sys_remove(struct device
*dev
)
1670 device_remove_file(dev
, &dev_attr_dapm_widget
);
1673 /* free all dapm widgets and resources */
1674 static void dapm_free_widgets(struct snd_soc_dapm_context
*dapm
)
1676 struct snd_soc_dapm_widget
*w
, *next_w
;
1677 struct snd_soc_dapm_path
*p
, *next_p
;
1679 list_for_each_entry_safe(w
, next_w
, &dapm
->card
->widgets
, list
) {
1680 if (w
->dapm
!= dapm
)
1684 * remove source and sink paths associated to this widget.
1685 * While removing the path, remove reference to it from both
1686 * source and sink widgets so that path is removed only once.
1688 list_for_each_entry_safe(p
, next_p
, &w
->sources
, list_sink
) {
1689 list_del(&p
->list_sink
);
1690 list_del(&p
->list_source
);
1692 kfree(p
->long_name
);
1695 list_for_each_entry_safe(p
, next_p
, &w
->sinks
, list_source
) {
1696 list_del(&p
->list_sink
);
1697 list_del(&p
->list_source
);
1699 kfree(p
->long_name
);
1702 kfree(w
->kcontrols
);
1708 static struct snd_soc_dapm_widget
*dapm_find_widget(
1709 struct snd_soc_dapm_context
*dapm
, const char *pin
,
1710 bool search_other_contexts
)
1712 struct snd_soc_dapm_widget
*w
;
1713 struct snd_soc_dapm_widget
*fallback
= NULL
;
1715 list_for_each_entry(w
, &dapm
->card
->widgets
, list
) {
1716 if (!strcmp(w
->name
, pin
)) {
1717 if (w
->dapm
== dapm
)
1724 if (search_other_contexts
)
1730 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context
*dapm
,
1731 const char *pin
, int status
)
1733 struct snd_soc_dapm_widget
*w
= dapm_find_widget(dapm
, pin
, true);
1736 dev_err(dapm
->dev
, "dapm: unknown pin %s\n", pin
);
1740 w
->connected
= status
;
1748 * snd_soc_dapm_sync - scan and power dapm paths
1749 * @dapm: DAPM context
1751 * Walks all dapm audio paths and powers widgets according to their
1752 * stream or path usage.
1754 * Returns 0 for success.
1756 int snd_soc_dapm_sync(struct snd_soc_dapm_context
*dapm
)
1758 return dapm_power_widgets(dapm
, SND_SOC_DAPM_STREAM_NOP
);
1760 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync
);
1762 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context
*dapm
,
1763 const struct snd_soc_dapm_route
*route
)
1765 struct snd_soc_dapm_path
*path
;
1766 struct snd_soc_dapm_widget
*wsource
= NULL
, *wsink
= NULL
, *w
;
1767 struct snd_soc_dapm_widget
*wtsource
= NULL
, *wtsink
= NULL
;
1769 const char *control
= route
->control
;
1771 char prefixed_sink
[80];
1772 char prefixed_source
[80];
1775 if (dapm
->codec
&& dapm
->codec
->name_prefix
) {
1776 snprintf(prefixed_sink
, sizeof(prefixed_sink
), "%s %s",
1777 dapm
->codec
->name_prefix
, route
->sink
);
1778 sink
= prefixed_sink
;
1779 snprintf(prefixed_source
, sizeof(prefixed_source
), "%s %s",
1780 dapm
->codec
->name_prefix
, route
->source
);
1781 source
= prefixed_source
;
1784 source
= route
->source
;
1788 * find src and dest widgets over all widgets but favor a widget from
1789 * current DAPM context
1791 list_for_each_entry(w
, &dapm
->card
->widgets
, list
) {
1792 if (!wsink
&& !(strcmp(w
->name
, sink
))) {
1794 if (w
->dapm
== dapm
)
1798 if (!wsource
&& !(strcmp(w
->name
, source
))) {
1800 if (w
->dapm
== dapm
)
1804 /* use widget from another DAPM context if not found from this */
1810 if (wsource
== NULL
|| wsink
== NULL
)
1813 path
= kzalloc(sizeof(struct snd_soc_dapm_path
), GFP_KERNEL
);
1817 path
->source
= wsource
;
1819 path
->connected
= route
->connected
;
1820 INIT_LIST_HEAD(&path
->list
);
1821 INIT_LIST_HEAD(&path
->list_source
);
1822 INIT_LIST_HEAD(&path
->list_sink
);
1824 /* check for external widgets */
1825 if (wsink
->id
== snd_soc_dapm_input
) {
1826 if (wsource
->id
== snd_soc_dapm_micbias
||
1827 wsource
->id
== snd_soc_dapm_mic
||
1828 wsource
->id
== snd_soc_dapm_line
||
1829 wsource
->id
== snd_soc_dapm_output
)
1832 if (wsource
->id
== snd_soc_dapm_output
) {
1833 if (wsink
->id
== snd_soc_dapm_spk
||
1834 wsink
->id
== snd_soc_dapm_hp
||
1835 wsink
->id
== snd_soc_dapm_line
||
1836 wsink
->id
== snd_soc_dapm_input
)
1840 /* connect static paths */
1841 if (control
== NULL
) {
1842 list_add(&path
->list
, &dapm
->card
->paths
);
1843 list_add(&path
->list_sink
, &wsink
->sources
);
1844 list_add(&path
->list_source
, &wsource
->sinks
);
1849 /* connect dynamic paths */
1850 switch (wsink
->id
) {
1851 case snd_soc_dapm_adc
:
1852 case snd_soc_dapm_dac
:
1853 case snd_soc_dapm_pga
:
1854 case snd_soc_dapm_out_drv
:
1855 case snd_soc_dapm_input
:
1856 case snd_soc_dapm_output
:
1857 case snd_soc_dapm_micbias
:
1858 case snd_soc_dapm_vmid
:
1859 case snd_soc_dapm_pre
:
1860 case snd_soc_dapm_post
:
1861 case snd_soc_dapm_supply
:
1862 case snd_soc_dapm_aif_in
:
1863 case snd_soc_dapm_aif_out
:
1864 list_add(&path
->list
, &dapm
->card
->paths
);
1865 list_add(&path
->list_sink
, &wsink
->sources
);
1866 list_add(&path
->list_source
, &wsource
->sinks
);
1869 case snd_soc_dapm_mux
:
1870 case snd_soc_dapm_virt_mux
:
1871 case snd_soc_dapm_value_mux
:
1872 ret
= dapm_connect_mux(dapm
, wsource
, wsink
, path
, control
,
1873 &wsink
->kcontrol_news
[0]);
1877 case snd_soc_dapm_switch
:
1878 case snd_soc_dapm_mixer
:
1879 case snd_soc_dapm_mixer_named_ctl
:
1880 ret
= dapm_connect_mixer(dapm
, wsource
, wsink
, path
, control
);
1884 case snd_soc_dapm_hp
:
1885 case snd_soc_dapm_mic
:
1886 case snd_soc_dapm_line
:
1887 case snd_soc_dapm_spk
:
1888 list_add(&path
->list
, &dapm
->card
->paths
);
1889 list_add(&path
->list_sink
, &wsink
->sources
);
1890 list_add(&path
->list_source
, &wsource
->sinks
);
1897 dev_warn(dapm
->dev
, "asoc: no dapm match for %s --> %s --> %s\n",
1898 source
, control
, sink
);
1904 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1905 * @dapm: DAPM context
1906 * @route: audio routes
1907 * @num: number of routes
1909 * Connects 2 dapm widgets together via a named audio path. The sink is
1910 * the widget receiving the audio signal, whilst the source is the sender
1911 * of the audio signal.
1913 * Returns 0 for success else error. On error all resources can be freed
1914 * with a call to snd_soc_card_free().
1916 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context
*dapm
,
1917 const struct snd_soc_dapm_route
*route
, int num
)
1921 for (i
= 0; i
< num
; i
++) {
1922 ret
= snd_soc_dapm_add_route(dapm
, route
);
1924 dev_err(dapm
->dev
, "Failed to add route %s->%s\n",
1925 route
->source
, route
->sink
);
1933 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes
);
1935 static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context
*dapm
,
1936 const struct snd_soc_dapm_route
*route
)
1938 struct snd_soc_dapm_widget
*source
= dapm_find_widget(dapm
,
1941 struct snd_soc_dapm_widget
*sink
= dapm_find_widget(dapm
,
1944 struct snd_soc_dapm_path
*path
;
1948 dev_err(dapm
->dev
, "Unable to find source %s for weak route\n",
1954 dev_err(dapm
->dev
, "Unable to find sink %s for weak route\n",
1959 if (route
->control
|| route
->connected
)
1960 dev_warn(dapm
->dev
, "Ignoring control for weak route %s->%s\n",
1961 route
->source
, route
->sink
);
1963 list_for_each_entry(path
, &source
->sinks
, list_source
) {
1964 if (path
->sink
== sink
) {
1971 dev_err(dapm
->dev
, "No path found for weak route %s->%s\n",
1972 route
->source
, route
->sink
);
1974 dev_warn(dapm
->dev
, "%d paths found for weak route %s->%s\n",
1975 count
, route
->source
, route
->sink
);
1981 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
1982 * @dapm: DAPM context
1983 * @route: audio routes
1984 * @num: number of routes
1986 * Mark existing routes matching those specified in the passed array
1987 * as being weak, meaning that they are ignored for the purpose of
1988 * power decisions. The main intended use case is for sidetone paths
1989 * which couple audio between other independent paths if they are both
1990 * active in order to make the combination work better at the user
1991 * level but which aren't intended to be "used".
1993 * Note that CODEC drivers should not use this as sidetone type paths
1994 * can frequently also be used as bypass paths.
1996 int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context
*dapm
,
1997 const struct snd_soc_dapm_route
*route
, int num
)
2002 for (i
= 0; i
< num
; i
++) {
2003 err
= snd_soc_dapm_weak_route(dapm
, route
);
2011 EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes
);
2014 * snd_soc_dapm_new_widgets - add new dapm widgets
2015 * @dapm: DAPM context
2017 * Checks the codec for any new dapm widgets and creates them if found.
2019 * Returns 0 for success.
2021 int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context
*dapm
)
2023 struct snd_soc_dapm_widget
*w
;
2026 list_for_each_entry(w
, &dapm
->card
->widgets
, list
)
2031 if (w
->num_kcontrols
) {
2032 w
->kcontrols
= kzalloc(w
->num_kcontrols
*
2033 sizeof(struct snd_kcontrol
*),
2040 case snd_soc_dapm_switch
:
2041 case snd_soc_dapm_mixer
:
2042 case snd_soc_dapm_mixer_named_ctl
:
2043 w
->power_check
= dapm_generic_check_power
;
2046 case snd_soc_dapm_mux
:
2047 case snd_soc_dapm_virt_mux
:
2048 case snd_soc_dapm_value_mux
:
2049 w
->power_check
= dapm_generic_check_power
;
2052 case snd_soc_dapm_adc
:
2053 case snd_soc_dapm_aif_out
:
2054 w
->power_check
= dapm_adc_check_power
;
2056 case snd_soc_dapm_dac
:
2057 case snd_soc_dapm_aif_in
:
2058 w
->power_check
= dapm_dac_check_power
;
2060 case snd_soc_dapm_pga
:
2061 case snd_soc_dapm_out_drv
:
2062 w
->power_check
= dapm_generic_check_power
;
2065 case snd_soc_dapm_input
:
2066 case snd_soc_dapm_output
:
2067 case snd_soc_dapm_micbias
:
2068 case snd_soc_dapm_spk
:
2069 case snd_soc_dapm_hp
:
2070 case snd_soc_dapm_mic
:
2071 case snd_soc_dapm_line
:
2072 w
->power_check
= dapm_generic_check_power
;
2074 case snd_soc_dapm_supply
:
2075 w
->power_check
= dapm_supply_check_power
;
2076 case snd_soc_dapm_vmid
:
2077 case snd_soc_dapm_pre
:
2078 case snd_soc_dapm_post
:
2082 /* Read the initial power state from the device */
2084 val
= soc_widget_read(w
, w
->reg
);
2085 val
&= 1 << w
->shift
;
2095 dapm_debugfs_add_widget(w
);
2098 dapm_power_widgets(dapm
, SND_SOC_DAPM_STREAM_NOP
);
2101 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets
);
2104 * snd_soc_dapm_get_volsw - dapm mixer get callback
2105 * @kcontrol: mixer control
2106 * @ucontrol: control element information
2108 * Callback to get the value of a dapm mixer control.
2110 * Returns 0 for success.
2112 int snd_soc_dapm_get_volsw(struct snd_kcontrol
*kcontrol
,
2113 struct snd_ctl_elem_value
*ucontrol
)
2115 struct snd_soc_dapm_widget_list
*wlist
= snd_kcontrol_chip(kcontrol
);
2116 struct snd_soc_dapm_widget
*widget
= wlist
->widgets
[0];
2117 struct soc_mixer_control
*mc
=
2118 (struct soc_mixer_control
*)kcontrol
->private_value
;
2119 unsigned int reg
= mc
->reg
;
2120 unsigned int shift
= mc
->shift
;
2121 unsigned int rshift
= mc
->rshift
;
2123 unsigned int invert
= mc
->invert
;
2124 unsigned int mask
= (1 << fls(max
)) - 1;
2126 ucontrol
->value
.integer
.value
[0] =
2127 (snd_soc_read(widget
->codec
, reg
) >> shift
) & mask
;
2128 if (shift
!= rshift
)
2129 ucontrol
->value
.integer
.value
[1] =
2130 (snd_soc_read(widget
->codec
, reg
) >> rshift
) & mask
;
2132 ucontrol
->value
.integer
.value
[0] =
2133 max
- ucontrol
->value
.integer
.value
[0];
2134 if (shift
!= rshift
)
2135 ucontrol
->value
.integer
.value
[1] =
2136 max
- ucontrol
->value
.integer
.value
[1];
2141 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw
);
2144 * snd_soc_dapm_put_volsw - dapm mixer set callback
2145 * @kcontrol: mixer control
2146 * @ucontrol: control element information
2148 * Callback to set the value of a dapm mixer control.
2150 * Returns 0 for success.
2152 int snd_soc_dapm_put_volsw(struct snd_kcontrol
*kcontrol
,
2153 struct snd_ctl_elem_value
*ucontrol
)
2155 struct snd_soc_dapm_widget_list
*wlist
= snd_kcontrol_chip(kcontrol
);
2156 struct snd_soc_dapm_widget
*widget
= wlist
->widgets
[0];
2157 struct snd_soc_codec
*codec
= widget
->codec
;
2158 struct soc_mixer_control
*mc
=
2159 (struct soc_mixer_control
*)kcontrol
->private_value
;
2160 unsigned int reg
= mc
->reg
;
2161 unsigned int shift
= mc
->shift
;
2163 unsigned int mask
= (1 << fls(max
)) - 1;
2164 unsigned int invert
= mc
->invert
;
2166 int connect
, change
;
2167 struct snd_soc_dapm_update update
;
2170 val
= (ucontrol
->value
.integer
.value
[0] & mask
);
2174 mask
= mask
<< shift
;
2178 /* new connection */
2179 connect
= invert
? 0 : 1;
2181 /* old connection must be powered down */
2182 connect
= invert
? 1 : 0;
2184 mutex_lock(&codec
->mutex
);
2186 change
= snd_soc_test_bits(widget
->codec
, reg
, mask
, val
);
2188 for (wi
= 0; wi
< wlist
->num_widgets
; wi
++) {
2189 widget
= wlist
->widgets
[wi
];
2191 widget
->value
= val
;
2193 update
.kcontrol
= kcontrol
;
2194 update
.widget
= widget
;
2198 widget
->dapm
->update
= &update
;
2200 dapm_mixer_update_power(widget
, kcontrol
, connect
);
2202 widget
->dapm
->update
= NULL
;
2206 mutex_unlock(&codec
->mutex
);
2209 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw
);
2212 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
2213 * @kcontrol: mixer control
2214 * @ucontrol: control element information
2216 * Callback to get the value of a dapm enumerated double mixer control.
2218 * Returns 0 for success.
2220 int snd_soc_dapm_get_enum_double(struct snd_kcontrol
*kcontrol
,
2221 struct snd_ctl_elem_value
*ucontrol
)
2223 struct snd_soc_dapm_widget_list
*wlist
= snd_kcontrol_chip(kcontrol
);
2224 struct snd_soc_dapm_widget
*widget
= wlist
->widgets
[0];
2225 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
2226 unsigned int val
, bitmask
;
2228 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
2230 val
= snd_soc_read(widget
->codec
, e
->reg
);
2231 ucontrol
->value
.enumerated
.item
[0] = (val
>> e
->shift_l
) & (bitmask
- 1);
2232 if (e
->shift_l
!= e
->shift_r
)
2233 ucontrol
->value
.enumerated
.item
[1] =
2234 (val
>> e
->shift_r
) & (bitmask
- 1);
2238 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double
);
2241 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
2242 * @kcontrol: mixer control
2243 * @ucontrol: control element information
2245 * Callback to set the value of a dapm enumerated double mixer control.
2247 * Returns 0 for success.
2249 int snd_soc_dapm_put_enum_double(struct snd_kcontrol
*kcontrol
,
2250 struct snd_ctl_elem_value
*ucontrol
)
2252 struct snd_soc_dapm_widget_list
*wlist
= snd_kcontrol_chip(kcontrol
);
2253 struct snd_soc_dapm_widget
*widget
= wlist
->widgets
[0];
2254 struct snd_soc_codec
*codec
= widget
->codec
;
2255 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
2256 unsigned int val
, mux
, change
;
2257 unsigned int mask
, bitmask
;
2258 struct snd_soc_dapm_update update
;
2261 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
2263 if (ucontrol
->value
.enumerated
.item
[0] > e
->max
- 1)
2265 mux
= ucontrol
->value
.enumerated
.item
[0];
2266 val
= mux
<< e
->shift_l
;
2267 mask
= (bitmask
- 1) << e
->shift_l
;
2268 if (e
->shift_l
!= e
->shift_r
) {
2269 if (ucontrol
->value
.enumerated
.item
[1] > e
->max
- 1)
2271 val
|= ucontrol
->value
.enumerated
.item
[1] << e
->shift_r
;
2272 mask
|= (bitmask
- 1) << e
->shift_r
;
2275 mutex_lock(&codec
->mutex
);
2277 change
= snd_soc_test_bits(widget
->codec
, e
->reg
, mask
, val
);
2279 for (wi
= 0; wi
< wlist
->num_widgets
; wi
++) {
2280 widget
= wlist
->widgets
[wi
];
2282 widget
->value
= val
;
2284 update
.kcontrol
= kcontrol
;
2285 update
.widget
= widget
;
2286 update
.reg
= e
->reg
;
2289 widget
->dapm
->update
= &update
;
2291 dapm_mux_update_power(widget
, kcontrol
, change
, mux
, e
);
2293 widget
->dapm
->update
= NULL
;
2297 mutex_unlock(&codec
->mutex
);
2300 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double
);
2303 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
2304 * @kcontrol: mixer control
2305 * @ucontrol: control element information
2307 * Returns 0 for success.
2309 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol
*kcontrol
,
2310 struct snd_ctl_elem_value
*ucontrol
)
2312 struct snd_soc_dapm_widget_list
*wlist
= snd_kcontrol_chip(kcontrol
);
2313 struct snd_soc_dapm_widget
*widget
= wlist
->widgets
[0];
2315 ucontrol
->value
.enumerated
.item
[0] = widget
->value
;
2319 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt
);
2322 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
2323 * @kcontrol: mixer control
2324 * @ucontrol: control element information
2326 * Returns 0 for success.
2328 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol
*kcontrol
,
2329 struct snd_ctl_elem_value
*ucontrol
)
2331 struct snd_soc_dapm_widget_list
*wlist
= snd_kcontrol_chip(kcontrol
);
2332 struct snd_soc_dapm_widget
*widget
= wlist
->widgets
[0];
2333 struct snd_soc_codec
*codec
= widget
->codec
;
2334 struct soc_enum
*e
=
2335 (struct soc_enum
*)kcontrol
->private_value
;
2340 if (ucontrol
->value
.enumerated
.item
[0] >= e
->max
)
2343 mutex_lock(&codec
->mutex
);
2345 change
= widget
->value
!= ucontrol
->value
.enumerated
.item
[0];
2347 for (wi
= 0; wi
< wlist
->num_widgets
; wi
++) {
2348 widget
= wlist
->widgets
[wi
];
2350 widget
->value
= ucontrol
->value
.enumerated
.item
[0];
2352 dapm_mux_update_power(widget
, kcontrol
, change
,
2357 mutex_unlock(&codec
->mutex
);
2360 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt
);
2363 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
2365 * @kcontrol: mixer control
2366 * @ucontrol: control element information
2368 * Callback to get the value of a dapm semi enumerated double mixer control.
2370 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2371 * used for handling bitfield coded enumeration for example.
2373 * Returns 0 for success.
2375 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol
*kcontrol
,
2376 struct snd_ctl_elem_value
*ucontrol
)
2378 struct snd_soc_dapm_widget_list
*wlist
= snd_kcontrol_chip(kcontrol
);
2379 struct snd_soc_dapm_widget
*widget
= wlist
->widgets
[0];
2380 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
2381 unsigned int reg_val
, val
, mux
;
2383 reg_val
= snd_soc_read(widget
->codec
, e
->reg
);
2384 val
= (reg_val
>> e
->shift_l
) & e
->mask
;
2385 for (mux
= 0; mux
< e
->max
; mux
++) {
2386 if (val
== e
->values
[mux
])
2389 ucontrol
->value
.enumerated
.item
[0] = mux
;
2390 if (e
->shift_l
!= e
->shift_r
) {
2391 val
= (reg_val
>> e
->shift_r
) & e
->mask
;
2392 for (mux
= 0; mux
< e
->max
; mux
++) {
2393 if (val
== e
->values
[mux
])
2396 ucontrol
->value
.enumerated
.item
[1] = mux
;
2401 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double
);
2404 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
2406 * @kcontrol: mixer control
2407 * @ucontrol: control element information
2409 * Callback to set the value of a dapm semi enumerated double mixer control.
2411 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2412 * used for handling bitfield coded enumeration for example.
2414 * Returns 0 for success.
2416 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol
*kcontrol
,
2417 struct snd_ctl_elem_value
*ucontrol
)
2419 struct snd_soc_dapm_widget_list
*wlist
= snd_kcontrol_chip(kcontrol
);
2420 struct snd_soc_dapm_widget
*widget
= wlist
->widgets
[0];
2421 struct snd_soc_codec
*codec
= widget
->codec
;
2422 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
2423 unsigned int val
, mux
, change
;
2425 struct snd_soc_dapm_update update
;
2428 if (ucontrol
->value
.enumerated
.item
[0] > e
->max
- 1)
2430 mux
= ucontrol
->value
.enumerated
.item
[0];
2431 val
= e
->values
[ucontrol
->value
.enumerated
.item
[0]] << e
->shift_l
;
2432 mask
= e
->mask
<< e
->shift_l
;
2433 if (e
->shift_l
!= e
->shift_r
) {
2434 if (ucontrol
->value
.enumerated
.item
[1] > e
->max
- 1)
2436 val
|= e
->values
[ucontrol
->value
.enumerated
.item
[1]] << e
->shift_r
;
2437 mask
|= e
->mask
<< e
->shift_r
;
2440 mutex_lock(&codec
->mutex
);
2442 change
= snd_soc_test_bits(widget
->codec
, e
->reg
, mask
, val
);
2444 for (wi
= 0; wi
< wlist
->num_widgets
; wi
++) {
2445 widget
= wlist
->widgets
[wi
];
2447 widget
->value
= val
;
2449 update
.kcontrol
= kcontrol
;
2450 update
.widget
= widget
;
2451 update
.reg
= e
->reg
;
2454 widget
->dapm
->update
= &update
;
2456 dapm_mux_update_power(widget
, kcontrol
, change
, mux
, e
);
2458 widget
->dapm
->update
= NULL
;
2462 mutex_unlock(&codec
->mutex
);
2465 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double
);
2468 * snd_soc_dapm_info_pin_switch - Info for a pin switch
2470 * @kcontrol: mixer control
2471 * @uinfo: control element information
2473 * Callback to provide information about a pin switch control.
2475 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol
*kcontrol
,
2476 struct snd_ctl_elem_info
*uinfo
)
2478 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_BOOLEAN
;
2480 uinfo
->value
.integer
.min
= 0;
2481 uinfo
->value
.integer
.max
= 1;
2485 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch
);
2488 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
2490 * @kcontrol: mixer control
2493 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol
*kcontrol
,
2494 struct snd_ctl_elem_value
*ucontrol
)
2496 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
2497 const char *pin
= (const char *)kcontrol
->private_value
;
2499 mutex_lock(&codec
->mutex
);
2501 ucontrol
->value
.integer
.value
[0] =
2502 snd_soc_dapm_get_pin_status(&codec
->dapm
, pin
);
2504 mutex_unlock(&codec
->mutex
);
2508 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch
);
2511 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
2513 * @kcontrol: mixer control
2516 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol
*kcontrol
,
2517 struct snd_ctl_elem_value
*ucontrol
)
2519 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
2520 const char *pin
= (const char *)kcontrol
->private_value
;
2522 mutex_lock(&codec
->mutex
);
2524 if (ucontrol
->value
.integer
.value
[0])
2525 snd_soc_dapm_enable_pin(&codec
->dapm
, pin
);
2527 snd_soc_dapm_disable_pin(&codec
->dapm
, pin
);
2529 snd_soc_dapm_sync(&codec
->dapm
);
2531 mutex_unlock(&codec
->mutex
);
2535 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch
);
2538 * snd_soc_dapm_new_control - create new dapm control
2539 * @dapm: DAPM context
2540 * @widget: widget template
2542 * Creates a new dapm control based upon the template.
2544 * Returns 0 for success else error.
2546 int snd_soc_dapm_new_control(struct snd_soc_dapm_context
*dapm
,
2547 const struct snd_soc_dapm_widget
*widget
)
2549 struct snd_soc_dapm_widget
*w
;
2552 if ((w
= dapm_cnew_widget(widget
)) == NULL
)
2555 name_len
= strlen(widget
->name
) + 1;
2556 if (dapm
->codec
&& dapm
->codec
->name_prefix
)
2557 name_len
+= 1 + strlen(dapm
->codec
->name_prefix
);
2558 w
->name
= kmalloc(name_len
, GFP_KERNEL
);
2559 if (w
->name
== NULL
) {
2563 if (dapm
->codec
&& dapm
->codec
->name_prefix
)
2564 snprintf(w
->name
, name_len
, "%s %s",
2565 dapm
->codec
->name_prefix
, widget
->name
);
2567 snprintf(w
->name
, name_len
, "%s", widget
->name
);
2571 w
->codec
= dapm
->codec
;
2572 w
->platform
= dapm
->platform
;
2573 INIT_LIST_HEAD(&w
->sources
);
2574 INIT_LIST_HEAD(&w
->sinks
);
2575 INIT_LIST_HEAD(&w
->list
);
2576 list_add(&w
->list
, &dapm
->card
->widgets
);
2578 /* machine layer set ups unconnected pins and insertions */
2582 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control
);
2585 * snd_soc_dapm_new_controls - create new dapm controls
2586 * @dapm: DAPM context
2587 * @widget: widget array
2588 * @num: number of widgets
2590 * Creates new DAPM controls based upon the templates.
2592 * Returns 0 for success else error.
2594 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context
*dapm
,
2595 const struct snd_soc_dapm_widget
*widget
,
2600 for (i
= 0; i
< num
; i
++) {
2601 ret
= snd_soc_dapm_new_control(dapm
, widget
);
2604 "ASoC: Failed to create DAPM control %s: %d\n",
2612 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls
);
2614 static void soc_dapm_stream_event(struct snd_soc_dapm_context
*dapm
,
2615 const char *stream
, int event
)
2617 struct snd_soc_dapm_widget
*w
;
2619 list_for_each_entry(w
, &dapm
->card
->widgets
, list
)
2621 if (!w
->sname
|| w
->dapm
!= dapm
)
2623 dev_vdbg(w
->dapm
->dev
, "widget %s\n %s stream %s event %d\n",
2624 w
->name
, w
->sname
, stream
, event
);
2625 if (strstr(w
->sname
, stream
)) {
2627 case SND_SOC_DAPM_STREAM_START
:
2630 case SND_SOC_DAPM_STREAM_STOP
:
2633 case SND_SOC_DAPM_STREAM_SUSPEND
:
2634 case SND_SOC_DAPM_STREAM_RESUME
:
2635 case SND_SOC_DAPM_STREAM_PAUSE_PUSH
:
2636 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE
:
2642 dapm_power_widgets(dapm
, event
);
2644 /* do we need to notify any clients that DAPM stream is complete */
2645 if (dapm
->stream_event
)
2646 dapm
->stream_event(dapm
, event
);
2650 * snd_soc_dapm_stream_event - send a stream event to the dapm core
2651 * @rtd: PCM runtime data
2652 * @stream: stream name
2653 * @event: stream event
2655 * Sends a stream event to the dapm core. The core then makes any
2656 * necessary widget power changes.
2658 * Returns 0 for success else error.
2660 int snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime
*rtd
,
2661 const char *stream
, int event
)
2663 struct snd_soc_codec
*codec
= rtd
->codec
;
2668 mutex_lock(&codec
->mutex
);
2669 soc_dapm_stream_event(&codec
->dapm
, stream
, event
);
2670 mutex_unlock(&codec
->mutex
);
2675 * snd_soc_dapm_enable_pin - enable pin.
2676 * @dapm: DAPM context
2679 * Enables input/output pin and its parents or children widgets iff there is
2680 * a valid audio route and active audio stream.
2681 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2682 * do any widget power switching.
2684 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context
*dapm
, const char *pin
)
2686 return snd_soc_dapm_set_pin(dapm
, pin
, 1);
2688 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin
);
2691 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
2692 * @dapm: DAPM context
2695 * Enables input/output pin regardless of any other state. This is
2696 * intended for use with microphone bias supplies used in microphone
2699 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2700 * do any widget power switching.
2702 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context
*dapm
,
2705 struct snd_soc_dapm_widget
*w
= dapm_find_widget(dapm
, pin
, true);
2708 dev_err(dapm
->dev
, "dapm: unknown pin %s\n", pin
);
2712 dev_dbg(w
->dapm
->dev
, "dapm: force enable pin %s\n", pin
);
2718 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin
);
2721 * snd_soc_dapm_disable_pin - disable pin.
2722 * @dapm: DAPM context
2725 * Disables input/output pin and its parents or children widgets.
2726 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2727 * do any widget power switching.
2729 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context
*dapm
,
2732 return snd_soc_dapm_set_pin(dapm
, pin
, 0);
2734 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin
);
2737 * snd_soc_dapm_nc_pin - permanently disable pin.
2738 * @dapm: DAPM context
2741 * Marks the specified pin as being not connected, disabling it along
2742 * any parent or child widgets. At present this is identical to
2743 * snd_soc_dapm_disable_pin() but in future it will be extended to do
2744 * additional things such as disabling controls which only affect
2745 * paths through the pin.
2747 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2748 * do any widget power switching.
2750 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context
*dapm
, const char *pin
)
2752 return snd_soc_dapm_set_pin(dapm
, pin
, 0);
2754 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin
);
2757 * snd_soc_dapm_get_pin_status - get audio pin status
2758 * @dapm: DAPM context
2759 * @pin: audio signal pin endpoint (or start point)
2761 * Get audio pin status - connected or disconnected.
2763 * Returns 1 for connected otherwise 0.
2765 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context
*dapm
,
2768 struct snd_soc_dapm_widget
*w
= dapm_find_widget(dapm
, pin
, true);
2771 return w
->connected
;
2775 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status
);
2778 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
2779 * @dapm: DAPM context
2780 * @pin: audio signal pin endpoint (or start point)
2782 * Mark the given endpoint or pin as ignoring suspend. When the
2783 * system is disabled a path between two endpoints flagged as ignoring
2784 * suspend will not be disabled. The path must already be enabled via
2785 * normal means at suspend time, it will not be turned on if it was not
2788 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context
*dapm
,
2791 struct snd_soc_dapm_widget
*w
= dapm_find_widget(dapm
, pin
, false);
2794 dev_err(dapm
->dev
, "dapm: unknown pin %s\n", pin
);
2798 w
->ignore_suspend
= 1;
2802 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend
);
2805 * snd_soc_dapm_free - free dapm resources
2806 * @dapm: DAPM context
2808 * Free all dapm widgets and resources.
2810 void snd_soc_dapm_free(struct snd_soc_dapm_context
*dapm
)
2812 snd_soc_dapm_sys_remove(dapm
->dev
);
2813 dapm_debugfs_cleanup(dapm
);
2814 dapm_free_widgets(dapm
);
2815 list_del(&dapm
->list
);
2817 EXPORT_SYMBOL_GPL(snd_soc_dapm_free
);
2819 static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context
*dapm
)
2821 struct snd_soc_dapm_widget
*w
;
2822 LIST_HEAD(down_list
);
2825 list_for_each_entry(w
, &dapm
->card
->widgets
, list
) {
2826 if (w
->dapm
!= dapm
)
2829 dapm_seq_insert(w
, &down_list
, false);
2835 /* If there were no widgets to power down we're already in
2839 snd_soc_dapm_set_bias_level(dapm
, SND_SOC_BIAS_PREPARE
);
2840 dapm_seq_run(dapm
, &down_list
, 0, false);
2841 snd_soc_dapm_set_bias_level(dapm
, SND_SOC_BIAS_STANDBY
);
2846 * snd_soc_dapm_shutdown - callback for system shutdown
2848 void snd_soc_dapm_shutdown(struct snd_soc_card
*card
)
2850 struct snd_soc_codec
*codec
;
2852 list_for_each_entry(codec
, &card
->codec_dev_list
, list
) {
2853 soc_dapm_shutdown_codec(&codec
->dapm
);
2854 snd_soc_dapm_set_bias_level(&codec
->dapm
, SND_SOC_BIAS_OFF
);
2858 /* Module information */
2859 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2860 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
2861 MODULE_LICENSE("GPL");