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
);
128 * snd_soc_dapm_set_bias_level - set the bias level for the system
129 * @dapm: DAPM context
130 * @level: level to configure
132 * Configure the bias (power) levels for the SoC audio device.
134 * Returns 0 for success else error.
136 static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context
*dapm
,
137 enum snd_soc_bias_level level
)
139 struct snd_soc_card
*card
= dapm
->card
;
143 case SND_SOC_BIAS_ON
:
144 dev_dbg(dapm
->dev
, "Setting full bias\n");
146 case SND_SOC_BIAS_PREPARE
:
147 dev_dbg(dapm
->dev
, "Setting bias prepare\n");
149 case SND_SOC_BIAS_STANDBY
:
150 dev_dbg(dapm
->dev
, "Setting standby bias\n");
152 case SND_SOC_BIAS_OFF
:
153 dev_dbg(dapm
->dev
, "Setting bias off\n");
156 dev_err(dapm
->dev
, "Setting invalid bias %d\n", level
);
160 trace_snd_soc_bias_level_start(card
, level
);
162 if (card
&& card
->set_bias_level
)
163 ret
= card
->set_bias_level(card
, level
);
165 if (dapm
->codec
&& dapm
->codec
->driver
->set_bias_level
)
166 ret
= dapm
->codec
->driver
->set_bias_level(dapm
->codec
, level
);
168 dapm
->bias_level
= level
;
171 if (card
&& card
->set_bias_level_post
)
172 ret
= card
->set_bias_level_post(card
, level
);
175 trace_snd_soc_bias_level_done(card
, level
);
180 /* set up initial codec paths */
181 static void dapm_set_path_status(struct snd_soc_dapm_widget
*w
,
182 struct snd_soc_dapm_path
*p
, int i
)
185 case snd_soc_dapm_switch
:
186 case snd_soc_dapm_mixer
:
187 case snd_soc_dapm_mixer_named_ctl
: {
189 struct soc_mixer_control
*mc
= (struct soc_mixer_control
*)
190 w
->kcontrols
[i
].private_value
;
191 unsigned int reg
= mc
->reg
;
192 unsigned int shift
= mc
->shift
;
194 unsigned int mask
= (1 << fls(max
)) - 1;
195 unsigned int invert
= mc
->invert
;
197 val
= snd_soc_read(w
->codec
, reg
);
198 val
= (val
>> shift
) & mask
;
200 if ((invert
&& !val
) || (!invert
&& val
))
206 case snd_soc_dapm_mux
: {
207 struct soc_enum
*e
= (struct soc_enum
*)w
->kcontrols
[i
].private_value
;
208 int val
, item
, bitmask
;
210 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
212 val
= snd_soc_read(w
->codec
, e
->reg
);
213 item
= (val
>> e
->shift_l
) & (bitmask
- 1);
216 for (i
= 0; i
< e
->max
; i
++) {
217 if (!(strcmp(p
->name
, e
->texts
[i
])) && item
== i
)
222 case snd_soc_dapm_virt_mux
: {
223 struct soc_enum
*e
= (struct soc_enum
*)w
->kcontrols
[i
].private_value
;
226 /* since a virtual mux has no backing registers to
227 * decide which path to connect, it will try to match
228 * with the first enumeration. This is to ensure
229 * that the default mux choice (the first) will be
230 * correctly powered up during initialization.
232 if (!strcmp(p
->name
, e
->texts
[0]))
236 case snd_soc_dapm_value_mux
: {
237 struct soc_enum
*e
= (struct soc_enum
*)
238 w
->kcontrols
[i
].private_value
;
241 val
= snd_soc_read(w
->codec
, e
->reg
);
242 val
= (val
>> e
->shift_l
) & e
->mask
;
243 for (item
= 0; item
< e
->max
; item
++) {
244 if (val
== e
->values
[item
])
249 for (i
= 0; i
< e
->max
; i
++) {
250 if (!(strcmp(p
->name
, e
->texts
[i
])) && item
== i
)
255 /* does not effect routing - always connected */
256 case snd_soc_dapm_pga
:
257 case snd_soc_dapm_out_drv
:
258 case snd_soc_dapm_output
:
259 case snd_soc_dapm_adc
:
260 case snd_soc_dapm_input
:
261 case snd_soc_dapm_dac
:
262 case snd_soc_dapm_micbias
:
263 case snd_soc_dapm_vmid
:
264 case snd_soc_dapm_supply
:
265 case snd_soc_dapm_aif_in
:
266 case snd_soc_dapm_aif_out
:
269 /* does effect routing - dynamically connected */
270 case snd_soc_dapm_hp
:
271 case snd_soc_dapm_mic
:
272 case snd_soc_dapm_spk
:
273 case snd_soc_dapm_line
:
274 case snd_soc_dapm_pre
:
275 case snd_soc_dapm_post
:
281 /* connect mux widget to its interconnecting audio paths */
282 static int dapm_connect_mux(struct snd_soc_dapm_context
*dapm
,
283 struct snd_soc_dapm_widget
*src
, struct snd_soc_dapm_widget
*dest
,
284 struct snd_soc_dapm_path
*path
, const char *control_name
,
285 const struct snd_kcontrol_new
*kcontrol
)
287 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
290 for (i
= 0; i
< e
->max
; i
++) {
291 if (!(strcmp(control_name
, e
->texts
[i
]))) {
292 list_add(&path
->list
, &dapm
->card
->paths
);
293 list_add(&path
->list_sink
, &dest
->sources
);
294 list_add(&path
->list_source
, &src
->sinks
);
295 path
->name
= (char*)e
->texts
[i
];
296 dapm_set_path_status(dest
, path
, 0);
304 /* connect mixer widget to its interconnecting audio paths */
305 static int dapm_connect_mixer(struct snd_soc_dapm_context
*dapm
,
306 struct snd_soc_dapm_widget
*src
, struct snd_soc_dapm_widget
*dest
,
307 struct snd_soc_dapm_path
*path
, const char *control_name
)
311 /* search for mixer kcontrol */
312 for (i
= 0; i
< dest
->num_kcontrols
; i
++) {
313 if (!strcmp(control_name
, dest
->kcontrols
[i
].name
)) {
314 list_add(&path
->list
, &dapm
->card
->paths
);
315 list_add(&path
->list_sink
, &dest
->sources
);
316 list_add(&path
->list_source
, &src
->sinks
);
317 path
->name
= dest
->kcontrols
[i
].name
;
318 dapm_set_path_status(dest
, path
, i
);
325 /* update dapm codec register bits */
326 static int dapm_update_bits(struct snd_soc_dapm_widget
*widget
)
329 unsigned int old
, new;
330 struct snd_soc_codec
*codec
= widget
->codec
;
331 struct snd_soc_dapm_context
*dapm
= widget
->dapm
;
332 struct snd_soc_card
*card
= dapm
->card
;
334 /* check for valid widgets */
335 if (widget
->reg
< 0 || widget
->id
== snd_soc_dapm_input
||
336 widget
->id
== snd_soc_dapm_output
||
337 widget
->id
== snd_soc_dapm_hp
||
338 widget
->id
== snd_soc_dapm_mic
||
339 widget
->id
== snd_soc_dapm_line
||
340 widget
->id
== snd_soc_dapm_spk
)
343 power
= widget
->power
;
345 power
= (power
? 0:1);
347 old
= snd_soc_read(codec
, widget
->reg
);
348 new = (old
& ~(0x1 << widget
->shift
)) | (power
<< widget
->shift
);
352 pop_dbg(dapm
->dev
, card
->pop_time
,
353 "pop test %s : %s in %d ms\n",
354 widget
->name
, widget
->power
? "on" : "off",
356 pop_wait(card
->pop_time
);
357 snd_soc_write(codec
, widget
->reg
, new);
359 dev_dbg(dapm
->dev
, "reg %x old %x new %x change %d\n", widget
->reg
,
364 /* create new dapm mixer control */
365 static int dapm_new_mixer(struct snd_soc_dapm_context
*dapm
,
366 struct snd_soc_dapm_widget
*w
)
370 struct snd_soc_dapm_path
*path
;
371 struct snd_card
*card
= dapm
->card
->snd_card
;
374 for (i
= 0; i
< w
->num_kcontrols
; i
++) {
377 list_for_each_entry(path
, &w
->sources
, list_sink
) {
379 /* mixer/mux paths name must match control name */
380 if (path
->name
!= (char*)w
->kcontrols
[i
].name
)
383 /* add dapm control with long name.
384 * for dapm_mixer this is the concatenation of the
385 * mixer and kcontrol name.
386 * for dapm_mixer_named_ctl this is simply the
389 name_len
= strlen(w
->kcontrols
[i
].name
) + 1;
390 if (w
->id
!= snd_soc_dapm_mixer_named_ctl
)
391 name_len
+= 1 + strlen(w
->name
);
393 path
->long_name
= kmalloc(name_len
, GFP_KERNEL
);
395 if (path
->long_name
== NULL
)
400 snprintf(path
->long_name
, name_len
, "%s %s",
401 w
->name
, w
->kcontrols
[i
].name
);
403 case snd_soc_dapm_mixer_named_ctl
:
404 snprintf(path
->long_name
, name_len
, "%s",
405 w
->kcontrols
[i
].name
);
409 path
->long_name
[name_len
- 1] = '\0';
411 path
->kcontrol
= snd_soc_cnew(&w
->kcontrols
[i
], w
,
413 ret
= snd_ctl_add(card
, path
->kcontrol
);
416 "asoc: failed to add dapm kcontrol %s: %d\n",
417 path
->long_name
, ret
);
418 kfree(path
->long_name
);
419 path
->long_name
= NULL
;
427 /* create new dapm mux control */
428 static int dapm_new_mux(struct snd_soc_dapm_context
*dapm
,
429 struct snd_soc_dapm_widget
*w
)
431 struct snd_soc_dapm_path
*path
= NULL
;
432 struct snd_kcontrol
*kcontrol
;
433 struct snd_card
*card
= dapm
->card
->snd_card
;
436 if (!w
->num_kcontrols
) {
437 dev_err(dapm
->dev
, "asoc: mux %s has no controls\n", w
->name
);
441 kcontrol
= snd_soc_cnew(&w
->kcontrols
[0], w
, w
->name
);
442 ret
= snd_ctl_add(card
, kcontrol
);
447 list_for_each_entry(path
, &w
->sources
, list_sink
)
448 path
->kcontrol
= kcontrol
;
453 dev_err(dapm
->dev
, "asoc: failed to add kcontrol %s\n", w
->name
);
457 /* create new dapm volume control */
458 static int dapm_new_pga(struct snd_soc_dapm_context
*dapm
,
459 struct snd_soc_dapm_widget
*w
)
461 if (w
->num_kcontrols
)
462 dev_err(w
->dapm
->dev
,
463 "asoc: PGA controls not supported: '%s'\n", w
->name
);
468 /* reset 'walked' bit for each dapm path */
469 static inline void dapm_clear_walk(struct snd_soc_dapm_context
*dapm
)
471 struct snd_soc_dapm_path
*p
;
473 list_for_each_entry(p
, &dapm
->card
->paths
, list
)
477 /* We implement power down on suspend by checking the power state of
478 * the ALSA card - when we are suspending the ALSA state for the card
481 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget
*widget
)
483 int level
= snd_power_get_state(widget
->dapm
->card
->snd_card
);
486 case SNDRV_CTL_POWER_D3hot
:
487 case SNDRV_CTL_POWER_D3cold
:
488 if (widget
->ignore_suspend
)
489 dev_dbg(widget
->dapm
->dev
, "%s ignoring suspend\n",
491 return widget
->ignore_suspend
;
498 * Recursively check for a completed path to an active or physically connected
499 * output widget. Returns number of complete paths.
501 static int is_connected_output_ep(struct snd_soc_dapm_widget
*widget
)
503 struct snd_soc_dapm_path
*path
;
506 if (widget
->id
== snd_soc_dapm_supply
)
509 switch (widget
->id
) {
510 case snd_soc_dapm_adc
:
511 case snd_soc_dapm_aif_out
:
513 return snd_soc_dapm_suspend_check(widget
);
518 if (widget
->connected
) {
519 /* connected pin ? */
520 if (widget
->id
== snd_soc_dapm_output
&& !widget
->ext
)
521 return snd_soc_dapm_suspend_check(widget
);
523 /* connected jack or spk ? */
524 if (widget
->id
== snd_soc_dapm_hp
|| widget
->id
== snd_soc_dapm_spk
||
525 (widget
->id
== snd_soc_dapm_line
&& !list_empty(&widget
->sources
)))
526 return snd_soc_dapm_suspend_check(widget
);
529 list_for_each_entry(path
, &widget
->sinks
, list_source
) {
533 if (path
->sink
&& path
->connect
) {
535 con
+= is_connected_output_ep(path
->sink
);
543 * Recursively check for a completed path to an active or physically connected
544 * input widget. Returns number of complete paths.
546 static int is_connected_input_ep(struct snd_soc_dapm_widget
*widget
)
548 struct snd_soc_dapm_path
*path
;
551 if (widget
->id
== snd_soc_dapm_supply
)
554 /* active stream ? */
555 switch (widget
->id
) {
556 case snd_soc_dapm_dac
:
557 case snd_soc_dapm_aif_in
:
559 return snd_soc_dapm_suspend_check(widget
);
564 if (widget
->connected
) {
565 /* connected pin ? */
566 if (widget
->id
== snd_soc_dapm_input
&& !widget
->ext
)
567 return snd_soc_dapm_suspend_check(widget
);
569 /* connected VMID/Bias for lower pops */
570 if (widget
->id
== snd_soc_dapm_vmid
)
571 return snd_soc_dapm_suspend_check(widget
);
573 /* connected jack ? */
574 if (widget
->id
== snd_soc_dapm_mic
||
575 (widget
->id
== snd_soc_dapm_line
&& !list_empty(&widget
->sinks
)))
576 return snd_soc_dapm_suspend_check(widget
);
579 list_for_each_entry(path
, &widget
->sources
, list_sink
) {
583 if (path
->source
&& path
->connect
) {
585 con
+= is_connected_input_ep(path
->source
);
593 * Handler for generic register modifier widget.
595 int dapm_reg_event(struct snd_soc_dapm_widget
*w
,
596 struct snd_kcontrol
*kcontrol
, int event
)
600 if (SND_SOC_DAPM_EVENT_ON(event
))
605 snd_soc_update_bits(w
->codec
, -(w
->reg
+ 1),
606 w
->mask
<< w
->shift
, val
<< w
->shift
);
610 EXPORT_SYMBOL_GPL(dapm_reg_event
);
612 /* Standard power change method, used to apply power changes to most
615 static int dapm_generic_apply_power(struct snd_soc_dapm_widget
*w
)
619 /* call any power change event handlers */
621 dev_dbg(w
->dapm
->dev
, "power %s event for %s flags %x\n",
622 w
->power
? "on" : "off",
623 w
->name
, w
->event_flags
);
625 /* power up pre event */
626 if (w
->power
&& w
->event
&&
627 (w
->event_flags
& SND_SOC_DAPM_PRE_PMU
)) {
628 ret
= w
->event(w
, NULL
, SND_SOC_DAPM_PRE_PMU
);
633 /* power down pre event */
634 if (!w
->power
&& w
->event
&&
635 (w
->event_flags
& SND_SOC_DAPM_PRE_PMD
)) {
636 ret
= w
->event(w
, NULL
, SND_SOC_DAPM_PRE_PMD
);
643 /* power up post event */
644 if (w
->power
&& w
->event
&&
645 (w
->event_flags
& SND_SOC_DAPM_POST_PMU
)) {
647 NULL
, SND_SOC_DAPM_POST_PMU
);
652 /* power down post event */
653 if (!w
->power
&& w
->event
&&
654 (w
->event_flags
& SND_SOC_DAPM_POST_PMD
)) {
655 ret
= w
->event(w
, NULL
, SND_SOC_DAPM_POST_PMD
);
663 /* Generic check to see if a widget should be powered.
665 static int dapm_generic_check_power(struct snd_soc_dapm_widget
*w
)
669 in
= is_connected_input_ep(w
);
670 dapm_clear_walk(w
->dapm
);
671 out
= is_connected_output_ep(w
);
672 dapm_clear_walk(w
->dapm
);
673 return out
!= 0 && in
!= 0;
676 /* Check to see if an ADC has power */
677 static int dapm_adc_check_power(struct snd_soc_dapm_widget
*w
)
682 in
= is_connected_input_ep(w
);
683 dapm_clear_walk(w
->dapm
);
686 return dapm_generic_check_power(w
);
690 /* Check to see if a DAC has power */
691 static int dapm_dac_check_power(struct snd_soc_dapm_widget
*w
)
696 out
= is_connected_output_ep(w
);
697 dapm_clear_walk(w
->dapm
);
700 return dapm_generic_check_power(w
);
704 /* Check to see if a power supply is needed */
705 static int dapm_supply_check_power(struct snd_soc_dapm_widget
*w
)
707 struct snd_soc_dapm_path
*path
;
710 /* Check if one of our outputs is connected */
711 list_for_each_entry(path
, &w
->sinks
, list_source
) {
712 if (path
->connected
&&
713 !path
->connected(path
->source
, path
->sink
))
719 if (path
->sink
->force
) {
724 if (path
->sink
->power_check
&&
725 path
->sink
->power_check(path
->sink
)) {
731 dapm_clear_walk(w
->dapm
);
736 static int dapm_seq_compare(struct snd_soc_dapm_widget
*a
,
737 struct snd_soc_dapm_widget
*b
,
745 sort
= dapm_down_seq
;
747 if (sort
[a
->id
] != sort
[b
->id
])
748 return sort
[a
->id
] - sort
[b
->id
];
749 if (a
->subseq
!= b
->subseq
) {
751 return a
->subseq
- b
->subseq
;
753 return b
->subseq
- a
->subseq
;
755 if (a
->reg
!= b
->reg
)
756 return a
->reg
- b
->reg
;
757 if (a
->dapm
!= b
->dapm
)
758 return (unsigned long)a
->dapm
- (unsigned long)b
->dapm
;
763 /* Insert a widget in order into a DAPM power sequence. */
764 static void dapm_seq_insert(struct snd_soc_dapm_widget
*new_widget
,
765 struct list_head
*list
,
768 struct snd_soc_dapm_widget
*w
;
770 list_for_each_entry(w
, list
, power_list
)
771 if (dapm_seq_compare(new_widget
, w
, power_up
) < 0) {
772 list_add_tail(&new_widget
->power_list
, &w
->power_list
);
776 list_add_tail(&new_widget
->power_list
, list
);
779 static void dapm_seq_check_event(struct snd_soc_dapm_context
*dapm
,
780 struct snd_soc_dapm_widget
*w
, int event
)
782 struct snd_soc_card
*card
= dapm
->card
;
787 case SND_SOC_DAPM_PRE_PMU
:
791 case SND_SOC_DAPM_POST_PMU
:
792 ev_name
= "POST_PMU";
795 case SND_SOC_DAPM_PRE_PMD
:
799 case SND_SOC_DAPM_POST_PMD
:
800 ev_name
= "POST_PMD";
808 if (w
->power
!= power
)
811 if (w
->event
&& (w
->event_flags
& event
)) {
812 pop_dbg(dapm
->dev
, card
->pop_time
, "pop test : %s %s\n",
814 trace_snd_soc_dapm_widget_event_start(w
, event
);
815 ret
= w
->event(w
, NULL
, event
);
816 trace_snd_soc_dapm_widget_event_done(w
, event
);
818 pr_err("%s: %s event failed: %d\n",
819 ev_name
, w
->name
, ret
);
823 /* Apply the coalesced changes from a DAPM sequence */
824 static void dapm_seq_run_coalesced(struct snd_soc_dapm_context
*dapm
,
825 struct list_head
*pending
)
827 struct snd_soc_card
*card
= dapm
->card
;
828 struct snd_soc_dapm_widget
*w
;
830 unsigned int value
= 0;
831 unsigned int mask
= 0;
832 unsigned int cur_mask
;
834 reg
= list_first_entry(pending
, struct snd_soc_dapm_widget
,
837 list_for_each_entry(w
, pending
, power_list
) {
838 cur_mask
= 1 << w
->shift
;
839 BUG_ON(reg
!= w
->reg
);
850 pop_dbg(dapm
->dev
, card
->pop_time
,
851 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
852 w
->name
, reg
, value
, mask
);
854 /* Check for events */
855 dapm_seq_check_event(dapm
, w
, SND_SOC_DAPM_PRE_PMU
);
856 dapm_seq_check_event(dapm
, w
, SND_SOC_DAPM_PRE_PMD
);
860 pop_dbg(dapm
->dev
, card
->pop_time
,
861 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
862 value
, mask
, reg
, card
->pop_time
);
863 pop_wait(card
->pop_time
);
864 snd_soc_update_bits(dapm
->codec
, reg
, mask
, value
);
867 list_for_each_entry(w
, pending
, power_list
) {
868 dapm_seq_check_event(dapm
, w
, SND_SOC_DAPM_POST_PMU
);
869 dapm_seq_check_event(dapm
, w
, SND_SOC_DAPM_POST_PMD
);
873 /* Apply a DAPM power sequence.
875 * We walk over a pre-sorted list of widgets to apply power to. In
876 * order to minimise the number of writes to the device required
877 * multiple widgets will be updated in a single write where possible.
878 * Currently anything that requires more than a single write is not
881 static void dapm_seq_run(struct snd_soc_dapm_context
*dapm
,
882 struct list_head
*list
, int event
, bool power_up
)
884 struct snd_soc_dapm_widget
*w
, *n
;
888 int cur_reg
= SND_SOC_NOPM
;
889 struct snd_soc_dapm_context
*cur_dapm
= NULL
;
896 sort
= dapm_down_seq
;
898 list_for_each_entry_safe(w
, n
, list
, power_list
) {
901 /* Do we need to apply any queued changes? */
902 if (sort
[w
->id
] != cur_sort
|| w
->reg
!= cur_reg
||
903 w
->dapm
!= cur_dapm
|| w
->subseq
!= cur_subseq
) {
904 if (!list_empty(&pending
))
905 dapm_seq_run_coalesced(cur_dapm
, &pending
);
907 if (cur_dapm
&& cur_dapm
->seq_notifier
) {
908 for (i
= 0; i
< ARRAY_SIZE(dapm_up_seq
); i
++)
909 if (sort
[i
] == cur_sort
)
910 cur_dapm
->seq_notifier(cur_dapm
,
915 INIT_LIST_HEAD(&pending
);
918 cur_reg
= SND_SOC_NOPM
;
923 case snd_soc_dapm_pre
:
925 list_for_each_entry_safe_continue(w
, n
, list
,
928 if (event
== SND_SOC_DAPM_STREAM_START
)
930 NULL
, SND_SOC_DAPM_PRE_PMU
);
931 else if (event
== SND_SOC_DAPM_STREAM_STOP
)
933 NULL
, SND_SOC_DAPM_PRE_PMD
);
936 case snd_soc_dapm_post
:
938 list_for_each_entry_safe_continue(w
, n
, list
,
941 if (event
== SND_SOC_DAPM_STREAM_START
)
943 NULL
, SND_SOC_DAPM_POST_PMU
);
944 else if (event
== SND_SOC_DAPM_STREAM_STOP
)
946 NULL
, SND_SOC_DAPM_POST_PMD
);
949 case snd_soc_dapm_input
:
950 case snd_soc_dapm_output
:
951 case snd_soc_dapm_hp
:
952 case snd_soc_dapm_mic
:
953 case snd_soc_dapm_line
:
954 case snd_soc_dapm_spk
:
955 /* No register support currently */
956 ret
= dapm_generic_apply_power(w
);
960 /* Queue it up for application */
961 cur_sort
= sort
[w
->id
];
962 cur_subseq
= w
->subseq
;
965 list_move(&w
->power_list
, &pending
);
970 dev_err(w
->dapm
->dev
,
971 "Failed to apply widget power: %d\n", ret
);
974 if (!list_empty(&pending
))
975 dapm_seq_run_coalesced(dapm
, &pending
);
977 if (cur_dapm
&& cur_dapm
->seq_notifier
) {
978 for (i
= 0; i
< ARRAY_SIZE(dapm_up_seq
); i
++)
979 if (sort
[i
] == cur_sort
)
980 cur_dapm
->seq_notifier(cur_dapm
,
985 static void dapm_widget_update(struct snd_soc_dapm_context
*dapm
)
987 struct snd_soc_dapm_update
*update
= dapm
->update
;
988 struct snd_soc_dapm_widget
*w
;
997 (w
->event_flags
& SND_SOC_DAPM_PRE_REG
)) {
998 ret
= w
->event(w
, update
->kcontrol
, SND_SOC_DAPM_PRE_REG
);
1000 pr_err("%s DAPM pre-event failed: %d\n",
1004 ret
= snd_soc_update_bits(w
->codec
, update
->reg
, update
->mask
,
1007 pr_err("%s DAPM update failed: %d\n", w
->name
, ret
);
1010 (w
->event_flags
& SND_SOC_DAPM_POST_REG
)) {
1011 ret
= w
->event(w
, update
->kcontrol
, SND_SOC_DAPM_POST_REG
);
1013 pr_err("%s DAPM post-event failed: %d\n",
1018 /* Async callback run prior to DAPM sequences - brings to _PREPARE if
1019 * they're changing state.
1021 static void dapm_pre_sequence_async(void *data
, async_cookie_t cookie
)
1023 struct snd_soc_dapm_context
*d
= data
;
1026 if (d
->dev_power
&& d
->bias_level
== SND_SOC_BIAS_OFF
) {
1027 ret
= snd_soc_dapm_set_bias_level(d
, SND_SOC_BIAS_STANDBY
);
1030 "Failed to turn on bias: %d\n", ret
);
1033 /* If we're changing to all on or all off then prepare */
1034 if ((d
->dev_power
&& d
->bias_level
== SND_SOC_BIAS_STANDBY
) ||
1035 (!d
->dev_power
&& d
->bias_level
== SND_SOC_BIAS_ON
)) {
1036 ret
= snd_soc_dapm_set_bias_level(d
, SND_SOC_BIAS_PREPARE
);
1039 "Failed to prepare bias: %d\n", ret
);
1043 /* Async callback run prior to DAPM sequences - brings to their final
1046 static void dapm_post_sequence_async(void *data
, async_cookie_t cookie
)
1048 struct snd_soc_dapm_context
*d
= data
;
1051 /* If we just powered the last thing off drop to standby bias */
1052 if (d
->bias_level
== SND_SOC_BIAS_PREPARE
&& !d
->dev_power
) {
1053 ret
= snd_soc_dapm_set_bias_level(d
, SND_SOC_BIAS_STANDBY
);
1055 dev_err(d
->dev
, "Failed to apply standby bias: %d\n",
1059 /* If we're in standby and can support bias off then do that */
1060 if (d
->bias_level
== SND_SOC_BIAS_STANDBY
&& d
->idle_bias_off
) {
1061 ret
= snd_soc_dapm_set_bias_level(d
, SND_SOC_BIAS_OFF
);
1063 dev_err(d
->dev
, "Failed to turn off bias: %d\n", ret
);
1066 /* If we just powered up then move to active bias */
1067 if (d
->bias_level
== SND_SOC_BIAS_PREPARE
&& d
->dev_power
) {
1068 ret
= snd_soc_dapm_set_bias_level(d
, SND_SOC_BIAS_ON
);
1070 dev_err(d
->dev
, "Failed to apply active bias: %d\n",
1076 * Scan each dapm widget for complete audio path.
1077 * A complete path is a route that has valid endpoints i.e.:-
1079 * o DAC to output pin.
1080 * o Input Pin to ADC.
1081 * o Input pin to Output pin (bypass, sidetone)
1082 * o DAC to ADC (loopback).
1084 static int dapm_power_widgets(struct snd_soc_dapm_context
*dapm
, int event
)
1086 struct snd_soc_card
*card
= dapm
->card
;
1087 struct snd_soc_dapm_widget
*w
;
1088 struct snd_soc_dapm_context
*d
;
1090 LIST_HEAD(down_list
);
1091 LIST_HEAD(async_domain
);
1094 trace_snd_soc_dapm_start(card
);
1096 list_for_each_entry(d
, &card
->dapm_list
, list
)
1100 /* Check which widgets we need to power and store them in
1101 * lists indicating if they should be powered up or down.
1103 list_for_each_entry(w
, &card
->widgets
, list
) {
1105 case snd_soc_dapm_pre
:
1106 dapm_seq_insert(w
, &down_list
, false);
1108 case snd_soc_dapm_post
:
1109 dapm_seq_insert(w
, &up_list
, true);
1113 if (!w
->power_check
)
1117 power
= w
->power_check(w
);
1121 w
->dapm
->dev_power
= 1;
1123 if (w
->power
== power
)
1126 trace_snd_soc_dapm_widget_power(w
, power
);
1129 dapm_seq_insert(w
, &up_list
, true);
1131 dapm_seq_insert(w
, &down_list
, false);
1138 /* If there are no DAPM widgets then try to figure out power from the
1141 if (!dapm
->n_widgets
) {
1143 case SND_SOC_DAPM_STREAM_START
:
1144 case SND_SOC_DAPM_STREAM_RESUME
:
1145 dapm
->dev_power
= 1;
1147 case SND_SOC_DAPM_STREAM_STOP
:
1148 dapm
->dev_power
= !!dapm
->codec
->active
;
1150 case SND_SOC_DAPM_STREAM_SUSPEND
:
1151 dapm
->dev_power
= 0;
1153 case SND_SOC_DAPM_STREAM_NOP
:
1154 switch (dapm
->bias_level
) {
1155 case SND_SOC_BIAS_STANDBY
:
1156 case SND_SOC_BIAS_OFF
:
1157 dapm
->dev_power
= 0;
1160 dapm
->dev_power
= 1;
1169 /* Run all the bias changes in parallel */
1170 list_for_each_entry(d
, &dapm
->card
->dapm_list
, list
)
1171 async_schedule_domain(dapm_pre_sequence_async
, d
,
1173 async_synchronize_full_domain(&async_domain
);
1175 /* Power down widgets first; try to avoid amplifying pops. */
1176 dapm_seq_run(dapm
, &down_list
, event
, false);
1178 dapm_widget_update(dapm
);
1181 dapm_seq_run(dapm
, &up_list
, event
, true);
1183 /* Run all the bias changes in parallel */
1184 list_for_each_entry(d
, &dapm
->card
->dapm_list
, list
)
1185 async_schedule_domain(dapm_post_sequence_async
, d
,
1187 async_synchronize_full_domain(&async_domain
);
1189 pop_dbg(dapm
->dev
, card
->pop_time
,
1190 "DAPM sequencing finished, waiting %dms\n", card
->pop_time
);
1191 pop_wait(card
->pop_time
);
1193 trace_snd_soc_dapm_done(card
);
1198 #ifdef CONFIG_DEBUG_FS
1199 static int dapm_widget_power_open_file(struct inode
*inode
, struct file
*file
)
1201 file
->private_data
= inode
->i_private
;
1205 static ssize_t
dapm_widget_power_read_file(struct file
*file
,
1206 char __user
*user_buf
,
1207 size_t count
, loff_t
*ppos
)
1209 struct snd_soc_dapm_widget
*w
= file
->private_data
;
1213 struct snd_soc_dapm_path
*p
= NULL
;
1215 buf
= kmalloc(PAGE_SIZE
, GFP_KERNEL
);
1219 in
= is_connected_input_ep(w
);
1220 dapm_clear_walk(w
->dapm
);
1221 out
= is_connected_output_ep(w
);
1222 dapm_clear_walk(w
->dapm
);
1224 ret
= snprintf(buf
, PAGE_SIZE
, "%s: %s in %d out %d",
1225 w
->name
, w
->power
? "On" : "Off", in
, out
);
1228 ret
+= snprintf(buf
+ ret
, PAGE_SIZE
- ret
,
1229 " - R%d(0x%x) bit %d",
1230 w
->reg
, w
->reg
, w
->shift
);
1232 ret
+= snprintf(buf
+ ret
, PAGE_SIZE
- ret
, "\n");
1235 ret
+= snprintf(buf
+ ret
, PAGE_SIZE
- ret
, " stream %s %s\n",
1237 w
->active
? "active" : "inactive");
1239 list_for_each_entry(p
, &w
->sources
, list_sink
) {
1240 if (p
->connected
&& !p
->connected(w
, p
->sink
))
1244 ret
+= snprintf(buf
+ ret
, PAGE_SIZE
- ret
,
1245 " in \"%s\" \"%s\"\n",
1246 p
->name
? p
->name
: "static",
1249 list_for_each_entry(p
, &w
->sinks
, list_source
) {
1250 if (p
->connected
&& !p
->connected(w
, p
->sink
))
1254 ret
+= snprintf(buf
+ ret
, PAGE_SIZE
- ret
,
1255 " out \"%s\" \"%s\"\n",
1256 p
->name
? p
->name
: "static",
1260 ret
= simple_read_from_buffer(user_buf
, count
, ppos
, buf
, ret
);
1266 static const struct file_operations dapm_widget_power_fops
= {
1267 .open
= dapm_widget_power_open_file
,
1268 .read
= dapm_widget_power_read_file
,
1269 .llseek
= default_llseek
,
1272 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context
*dapm
)
1274 struct snd_soc_dapm_widget
*w
;
1277 if (!dapm
->debugfs_dapm
)
1280 list_for_each_entry(w
, &dapm
->card
->widgets
, list
) {
1281 if (!w
->name
|| w
->dapm
!= dapm
)
1284 d
= debugfs_create_file(w
->name
, 0444,
1285 dapm
->debugfs_dapm
, w
,
1286 &dapm_widget_power_fops
);
1288 dev_warn(w
->dapm
->dev
,
1289 "ASoC: Failed to create %s debugfs file\n",
1294 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context
*dapm
)
1299 /* test and update the power status of a mux widget */
1300 static int dapm_mux_update_power(struct snd_soc_dapm_widget
*widget
,
1301 struct snd_kcontrol
*kcontrol
, int change
,
1302 int mux
, struct soc_enum
*e
)
1304 struct snd_soc_dapm_path
*path
;
1307 if (widget
->id
!= snd_soc_dapm_mux
&&
1308 widget
->id
!= snd_soc_dapm_virt_mux
&&
1309 widget
->id
!= snd_soc_dapm_value_mux
)
1315 /* find dapm widget path assoc with kcontrol */
1316 list_for_each_entry(path
, &widget
->dapm
->card
->paths
, list
) {
1317 if (path
->kcontrol
!= kcontrol
)
1320 if (!path
->name
|| !e
->texts
[mux
])
1324 /* we now need to match the string in the enum to the path */
1325 if (!(strcmp(path
->name
, e
->texts
[mux
])))
1326 path
->connect
= 1; /* new connection */
1328 path
->connect
= 0; /* old connection must be powered down */
1332 dapm_power_widgets(widget
->dapm
, SND_SOC_DAPM_STREAM_NOP
);
1337 /* test and update the power status of a mixer or switch widget */
1338 static int dapm_mixer_update_power(struct snd_soc_dapm_widget
*widget
,
1339 struct snd_kcontrol
*kcontrol
, int connect
)
1341 struct snd_soc_dapm_path
*path
;
1344 if (widget
->id
!= snd_soc_dapm_mixer
&&
1345 widget
->id
!= snd_soc_dapm_mixer_named_ctl
&&
1346 widget
->id
!= snd_soc_dapm_switch
)
1349 /* find dapm widget path assoc with kcontrol */
1350 list_for_each_entry(path
, &widget
->dapm
->card
->paths
, list
) {
1351 if (path
->kcontrol
!= kcontrol
)
1354 /* found, now check type */
1356 path
->connect
= connect
;
1361 dapm_power_widgets(widget
->dapm
, SND_SOC_DAPM_STREAM_NOP
);
1366 /* show dapm widget status in sys fs */
1367 static ssize_t
dapm_widget_show(struct device
*dev
,
1368 struct device_attribute
*attr
, char *buf
)
1370 struct snd_soc_pcm_runtime
*rtd
=
1371 container_of(dev
, struct snd_soc_pcm_runtime
, dev
);
1372 struct snd_soc_codec
*codec
=rtd
->codec
;
1373 struct snd_soc_dapm_widget
*w
;
1375 char *state
= "not set";
1377 list_for_each_entry(w
, &codec
->card
->widgets
, list
) {
1378 if (w
->dapm
!= &codec
->dapm
)
1381 /* only display widgets that burnm power */
1383 case snd_soc_dapm_hp
:
1384 case snd_soc_dapm_mic
:
1385 case snd_soc_dapm_spk
:
1386 case snd_soc_dapm_line
:
1387 case snd_soc_dapm_micbias
:
1388 case snd_soc_dapm_dac
:
1389 case snd_soc_dapm_adc
:
1390 case snd_soc_dapm_pga
:
1391 case snd_soc_dapm_out_drv
:
1392 case snd_soc_dapm_mixer
:
1393 case snd_soc_dapm_mixer_named_ctl
:
1394 case snd_soc_dapm_supply
:
1396 count
+= sprintf(buf
+ count
, "%s: %s\n",
1397 w
->name
, w
->power
? "On":"Off");
1404 switch (codec
->dapm
.bias_level
) {
1405 case SND_SOC_BIAS_ON
:
1408 case SND_SOC_BIAS_PREPARE
:
1411 case SND_SOC_BIAS_STANDBY
:
1414 case SND_SOC_BIAS_OFF
:
1418 count
+= sprintf(buf
+ count
, "PM State: %s\n", state
);
1423 static DEVICE_ATTR(dapm_widget
, 0444, dapm_widget_show
, NULL
);
1425 int snd_soc_dapm_sys_add(struct device
*dev
)
1427 return device_create_file(dev
, &dev_attr_dapm_widget
);
1430 static void snd_soc_dapm_sys_remove(struct device
*dev
)
1432 device_remove_file(dev
, &dev_attr_dapm_widget
);
1435 /* free all dapm widgets and resources */
1436 static void dapm_free_widgets(struct snd_soc_dapm_context
*dapm
)
1438 struct snd_soc_dapm_widget
*w
, *next_w
;
1439 struct snd_soc_dapm_path
*p
, *next_p
;
1441 list_for_each_entry_safe(w
, next_w
, &dapm
->card
->widgets
, list
) {
1442 if (w
->dapm
!= dapm
)
1446 * remove source and sink paths associated to this widget.
1447 * While removing the path, remove reference to it from both
1448 * source and sink widgets so that path is removed only once.
1450 list_for_each_entry_safe(p
, next_p
, &w
->sources
, list_sink
) {
1451 list_del(&p
->list_sink
);
1452 list_del(&p
->list_source
);
1454 kfree(p
->long_name
);
1457 list_for_each_entry_safe(p
, next_p
, &w
->sinks
, list_source
) {
1458 list_del(&p
->list_sink
);
1459 list_del(&p
->list_source
);
1461 kfree(p
->long_name
);
1469 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context
*dapm
,
1470 const char *pin
, int status
)
1472 struct snd_soc_dapm_widget
*w
;
1474 list_for_each_entry(w
, &dapm
->card
->widgets
, list
) {
1475 if (w
->dapm
!= dapm
)
1477 if (!strcmp(w
->name
, pin
)) {
1478 dev_dbg(w
->dapm
->dev
, "dapm: pin %s = %d\n",
1480 w
->connected
= status
;
1481 /* Allow disabling of forced pins */
1488 dev_err(dapm
->dev
, "dapm: unknown pin %s\n", pin
);
1493 * snd_soc_dapm_sync - scan and power dapm paths
1494 * @dapm: DAPM context
1496 * Walks all dapm audio paths and powers widgets according to their
1497 * stream or path usage.
1499 * Returns 0 for success.
1501 int snd_soc_dapm_sync(struct snd_soc_dapm_context
*dapm
)
1503 return dapm_power_widgets(dapm
, SND_SOC_DAPM_STREAM_NOP
);
1505 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync
);
1507 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context
*dapm
,
1508 const struct snd_soc_dapm_route
*route
)
1510 struct snd_soc_dapm_path
*path
;
1511 struct snd_soc_dapm_widget
*wsource
= NULL
, *wsink
= NULL
, *w
;
1512 struct snd_soc_dapm_widget
*wtsource
= NULL
, *wtsink
= NULL
;
1514 const char *control
= route
->control
;
1516 char prefixed_sink
[80];
1517 char prefixed_source
[80];
1520 if (dapm
->codec
->name_prefix
) {
1521 snprintf(prefixed_sink
, sizeof(prefixed_sink
), "%s %s",
1522 dapm
->codec
->name_prefix
, route
->sink
);
1523 sink
= prefixed_sink
;
1524 snprintf(prefixed_source
, sizeof(prefixed_source
), "%s %s",
1525 dapm
->codec
->name_prefix
, route
->source
);
1526 source
= prefixed_source
;
1529 source
= route
->source
;
1533 * find src and dest widgets over all widgets but favor a widget from
1534 * current DAPM context
1536 list_for_each_entry(w
, &dapm
->card
->widgets
, list
) {
1537 if (!wsink
&& !(strcmp(w
->name
, sink
))) {
1539 if (w
->dapm
== dapm
)
1543 if (!wsource
&& !(strcmp(w
->name
, source
))) {
1545 if (w
->dapm
== dapm
)
1549 /* use widget from another DAPM context if not found from this */
1555 if (wsource
== NULL
|| wsink
== NULL
)
1558 path
= kzalloc(sizeof(struct snd_soc_dapm_path
), GFP_KERNEL
);
1562 path
->source
= wsource
;
1564 path
->connected
= route
->connected
;
1565 INIT_LIST_HEAD(&path
->list
);
1566 INIT_LIST_HEAD(&path
->list_source
);
1567 INIT_LIST_HEAD(&path
->list_sink
);
1569 /* check for external widgets */
1570 if (wsink
->id
== snd_soc_dapm_input
) {
1571 if (wsource
->id
== snd_soc_dapm_micbias
||
1572 wsource
->id
== snd_soc_dapm_mic
||
1573 wsource
->id
== snd_soc_dapm_line
||
1574 wsource
->id
== snd_soc_dapm_output
)
1577 if (wsource
->id
== snd_soc_dapm_output
) {
1578 if (wsink
->id
== snd_soc_dapm_spk
||
1579 wsink
->id
== snd_soc_dapm_hp
||
1580 wsink
->id
== snd_soc_dapm_line
||
1581 wsink
->id
== snd_soc_dapm_input
)
1585 /* connect static paths */
1586 if (control
== NULL
) {
1587 list_add(&path
->list
, &dapm
->card
->paths
);
1588 list_add(&path
->list_sink
, &wsink
->sources
);
1589 list_add(&path
->list_source
, &wsource
->sinks
);
1594 /* connect dynamic paths */
1596 case snd_soc_dapm_adc
:
1597 case snd_soc_dapm_dac
:
1598 case snd_soc_dapm_pga
:
1599 case snd_soc_dapm_out_drv
:
1600 case snd_soc_dapm_input
:
1601 case snd_soc_dapm_output
:
1602 case snd_soc_dapm_micbias
:
1603 case snd_soc_dapm_vmid
:
1604 case snd_soc_dapm_pre
:
1605 case snd_soc_dapm_post
:
1606 case snd_soc_dapm_supply
:
1607 case snd_soc_dapm_aif_in
:
1608 case snd_soc_dapm_aif_out
:
1609 list_add(&path
->list
, &dapm
->card
->paths
);
1610 list_add(&path
->list_sink
, &wsink
->sources
);
1611 list_add(&path
->list_source
, &wsource
->sinks
);
1614 case snd_soc_dapm_mux
:
1615 case snd_soc_dapm_virt_mux
:
1616 case snd_soc_dapm_value_mux
:
1617 ret
= dapm_connect_mux(dapm
, wsource
, wsink
, path
, control
,
1618 &wsink
->kcontrols
[0]);
1622 case snd_soc_dapm_switch
:
1623 case snd_soc_dapm_mixer
:
1624 case snd_soc_dapm_mixer_named_ctl
:
1625 ret
= dapm_connect_mixer(dapm
, wsource
, wsink
, path
, control
);
1629 case snd_soc_dapm_hp
:
1630 case snd_soc_dapm_mic
:
1631 case snd_soc_dapm_line
:
1632 case snd_soc_dapm_spk
:
1633 list_add(&path
->list
, &dapm
->card
->paths
);
1634 list_add(&path
->list_sink
, &wsink
->sources
);
1635 list_add(&path
->list_source
, &wsource
->sinks
);
1642 dev_warn(dapm
->dev
, "asoc: no dapm match for %s --> %s --> %s\n",
1643 source
, control
, sink
);
1649 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1650 * @dapm: DAPM context
1651 * @route: audio routes
1652 * @num: number of routes
1654 * Connects 2 dapm widgets together via a named audio path. The sink is
1655 * the widget receiving the audio signal, whilst the source is the sender
1656 * of the audio signal.
1658 * Returns 0 for success else error. On error all resources can be freed
1659 * with a call to snd_soc_card_free().
1661 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context
*dapm
,
1662 const struct snd_soc_dapm_route
*route
, int num
)
1666 for (i
= 0; i
< num
; i
++) {
1667 ret
= snd_soc_dapm_add_route(dapm
, route
);
1669 dev_err(dapm
->dev
, "Failed to add route %s->%s\n",
1670 route
->source
, route
->sink
);
1678 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes
);
1681 * snd_soc_dapm_new_widgets - add new dapm widgets
1682 * @dapm: DAPM context
1684 * Checks the codec for any new dapm widgets and creates them if found.
1686 * Returns 0 for success.
1688 int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context
*dapm
)
1690 struct snd_soc_dapm_widget
*w
;
1693 list_for_each_entry(w
, &dapm
->card
->widgets
, list
)
1699 case snd_soc_dapm_switch
:
1700 case snd_soc_dapm_mixer
:
1701 case snd_soc_dapm_mixer_named_ctl
:
1702 w
->power_check
= dapm_generic_check_power
;
1703 dapm_new_mixer(dapm
, w
);
1705 case snd_soc_dapm_mux
:
1706 case snd_soc_dapm_virt_mux
:
1707 case snd_soc_dapm_value_mux
:
1708 w
->power_check
= dapm_generic_check_power
;
1709 dapm_new_mux(dapm
, w
);
1711 case snd_soc_dapm_adc
:
1712 case snd_soc_dapm_aif_out
:
1713 w
->power_check
= dapm_adc_check_power
;
1715 case snd_soc_dapm_dac
:
1716 case snd_soc_dapm_aif_in
:
1717 w
->power_check
= dapm_dac_check_power
;
1719 case snd_soc_dapm_pga
:
1720 case snd_soc_dapm_out_drv
:
1721 w
->power_check
= dapm_generic_check_power
;
1722 dapm_new_pga(dapm
, w
);
1724 case snd_soc_dapm_input
:
1725 case snd_soc_dapm_output
:
1726 case snd_soc_dapm_micbias
:
1727 case snd_soc_dapm_spk
:
1728 case snd_soc_dapm_hp
:
1729 case snd_soc_dapm_mic
:
1730 case snd_soc_dapm_line
:
1731 w
->power_check
= dapm_generic_check_power
;
1733 case snd_soc_dapm_supply
:
1734 w
->power_check
= dapm_supply_check_power
;
1735 case snd_soc_dapm_vmid
:
1736 case snd_soc_dapm_pre
:
1737 case snd_soc_dapm_post
:
1741 /* Read the initial power state from the device */
1743 val
= snd_soc_read(w
->codec
, w
->reg
);
1744 val
&= 1 << w
->shift
;
1755 dapm_power_widgets(dapm
, SND_SOC_DAPM_STREAM_NOP
);
1758 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets
);
1761 * snd_soc_dapm_get_volsw - dapm mixer get callback
1762 * @kcontrol: mixer control
1763 * @ucontrol: control element information
1765 * Callback to get the value of a dapm mixer control.
1767 * Returns 0 for success.
1769 int snd_soc_dapm_get_volsw(struct snd_kcontrol
*kcontrol
,
1770 struct snd_ctl_elem_value
*ucontrol
)
1772 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1773 struct soc_mixer_control
*mc
=
1774 (struct soc_mixer_control
*)kcontrol
->private_value
;
1775 unsigned int reg
= mc
->reg
;
1776 unsigned int shift
= mc
->shift
;
1777 unsigned int rshift
= mc
->rshift
;
1779 unsigned int invert
= mc
->invert
;
1780 unsigned int mask
= (1 << fls(max
)) - 1;
1782 ucontrol
->value
.integer
.value
[0] =
1783 (snd_soc_read(widget
->codec
, reg
) >> shift
) & mask
;
1784 if (shift
!= rshift
)
1785 ucontrol
->value
.integer
.value
[1] =
1786 (snd_soc_read(widget
->codec
, reg
) >> rshift
) & mask
;
1788 ucontrol
->value
.integer
.value
[0] =
1789 max
- ucontrol
->value
.integer
.value
[0];
1790 if (shift
!= rshift
)
1791 ucontrol
->value
.integer
.value
[1] =
1792 max
- ucontrol
->value
.integer
.value
[1];
1797 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw
);
1800 * snd_soc_dapm_put_volsw - dapm mixer set callback
1801 * @kcontrol: mixer control
1802 * @ucontrol: control element information
1804 * Callback to set the value of a dapm mixer control.
1806 * Returns 0 for success.
1808 int snd_soc_dapm_put_volsw(struct snd_kcontrol
*kcontrol
,
1809 struct snd_ctl_elem_value
*ucontrol
)
1811 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1812 struct soc_mixer_control
*mc
=
1813 (struct soc_mixer_control
*)kcontrol
->private_value
;
1814 unsigned int reg
= mc
->reg
;
1815 unsigned int shift
= mc
->shift
;
1817 unsigned int mask
= (1 << fls(max
)) - 1;
1818 unsigned int invert
= mc
->invert
;
1820 int connect
, change
;
1821 struct snd_soc_dapm_update update
;
1823 val
= (ucontrol
->value
.integer
.value
[0] & mask
);
1827 mask
= mask
<< shift
;
1830 mutex_lock(&widget
->codec
->mutex
);
1831 widget
->value
= val
;
1833 change
= snd_soc_test_bits(widget
->codec
, reg
, mask
, val
);
1836 /* new connection */
1837 connect
= invert
? 0:1;
1839 /* old connection must be powered down */
1840 connect
= invert
? 1:0;
1842 update
.kcontrol
= kcontrol
;
1843 update
.widget
= widget
;
1847 widget
->dapm
->update
= &update
;
1849 dapm_mixer_update_power(widget
, kcontrol
, connect
);
1851 widget
->dapm
->update
= NULL
;
1854 mutex_unlock(&widget
->codec
->mutex
);
1857 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw
);
1860 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
1861 * @kcontrol: mixer control
1862 * @ucontrol: control element information
1864 * Callback to get the value of a dapm enumerated double mixer control.
1866 * Returns 0 for success.
1868 int snd_soc_dapm_get_enum_double(struct snd_kcontrol
*kcontrol
,
1869 struct snd_ctl_elem_value
*ucontrol
)
1871 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1872 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1873 unsigned int val
, bitmask
;
1875 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
1877 val
= snd_soc_read(widget
->codec
, e
->reg
);
1878 ucontrol
->value
.enumerated
.item
[0] = (val
>> e
->shift_l
) & (bitmask
- 1);
1879 if (e
->shift_l
!= e
->shift_r
)
1880 ucontrol
->value
.enumerated
.item
[1] =
1881 (val
>> e
->shift_r
) & (bitmask
- 1);
1885 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double
);
1888 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
1889 * @kcontrol: mixer control
1890 * @ucontrol: control element information
1892 * Callback to set the value of a dapm enumerated double mixer control.
1894 * Returns 0 for success.
1896 int snd_soc_dapm_put_enum_double(struct snd_kcontrol
*kcontrol
,
1897 struct snd_ctl_elem_value
*ucontrol
)
1899 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1900 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1901 unsigned int val
, mux
, change
;
1902 unsigned int mask
, bitmask
;
1903 struct snd_soc_dapm_update update
;
1905 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
1907 if (ucontrol
->value
.enumerated
.item
[0] > e
->max
- 1)
1909 mux
= ucontrol
->value
.enumerated
.item
[0];
1910 val
= mux
<< e
->shift_l
;
1911 mask
= (bitmask
- 1) << e
->shift_l
;
1912 if (e
->shift_l
!= e
->shift_r
) {
1913 if (ucontrol
->value
.enumerated
.item
[1] > e
->max
- 1)
1915 val
|= ucontrol
->value
.enumerated
.item
[1] << e
->shift_r
;
1916 mask
|= (bitmask
- 1) << e
->shift_r
;
1919 mutex_lock(&widget
->codec
->mutex
);
1920 widget
->value
= val
;
1921 change
= snd_soc_test_bits(widget
->codec
, e
->reg
, mask
, val
);
1923 update
.kcontrol
= kcontrol
;
1924 update
.widget
= widget
;
1925 update
.reg
= e
->reg
;
1928 widget
->dapm
->update
= &update
;
1930 dapm_mux_update_power(widget
, kcontrol
, change
, mux
, e
);
1932 widget
->dapm
->update
= NULL
;
1934 mutex_unlock(&widget
->codec
->mutex
);
1937 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double
);
1940 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
1941 * @kcontrol: mixer control
1942 * @ucontrol: control element information
1944 * Returns 0 for success.
1946 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol
*kcontrol
,
1947 struct snd_ctl_elem_value
*ucontrol
)
1949 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1951 ucontrol
->value
.enumerated
.item
[0] = widget
->value
;
1955 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt
);
1958 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
1959 * @kcontrol: mixer control
1960 * @ucontrol: control element information
1962 * Returns 0 for success.
1964 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol
*kcontrol
,
1965 struct snd_ctl_elem_value
*ucontrol
)
1967 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1968 struct soc_enum
*e
=
1969 (struct soc_enum
*)kcontrol
->private_value
;
1973 if (ucontrol
->value
.enumerated
.item
[0] >= e
->max
)
1976 mutex_lock(&widget
->codec
->mutex
);
1978 change
= widget
->value
!= ucontrol
->value
.enumerated
.item
[0];
1979 widget
->value
= ucontrol
->value
.enumerated
.item
[0];
1980 dapm_mux_update_power(widget
, kcontrol
, change
, widget
->value
, e
);
1982 mutex_unlock(&widget
->codec
->mutex
);
1985 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt
);
1988 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
1990 * @kcontrol: mixer control
1991 * @ucontrol: control element information
1993 * Callback to get the value of a dapm semi enumerated double mixer control.
1995 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1996 * used for handling bitfield coded enumeration for example.
1998 * Returns 0 for success.
2000 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol
*kcontrol
,
2001 struct snd_ctl_elem_value
*ucontrol
)
2003 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
2004 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
2005 unsigned int reg_val
, val
, mux
;
2007 reg_val
= snd_soc_read(widget
->codec
, e
->reg
);
2008 val
= (reg_val
>> e
->shift_l
) & e
->mask
;
2009 for (mux
= 0; mux
< e
->max
; mux
++) {
2010 if (val
== e
->values
[mux
])
2013 ucontrol
->value
.enumerated
.item
[0] = mux
;
2014 if (e
->shift_l
!= e
->shift_r
) {
2015 val
= (reg_val
>> e
->shift_r
) & e
->mask
;
2016 for (mux
= 0; mux
< e
->max
; mux
++) {
2017 if (val
== e
->values
[mux
])
2020 ucontrol
->value
.enumerated
.item
[1] = mux
;
2025 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double
);
2028 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
2030 * @kcontrol: mixer control
2031 * @ucontrol: control element information
2033 * Callback to set the value of a dapm semi enumerated double mixer control.
2035 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2036 * used for handling bitfield coded enumeration for example.
2038 * Returns 0 for success.
2040 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol
*kcontrol
,
2041 struct snd_ctl_elem_value
*ucontrol
)
2043 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
2044 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
2045 unsigned int val
, mux
, change
;
2047 struct snd_soc_dapm_update update
;
2049 if (ucontrol
->value
.enumerated
.item
[0] > e
->max
- 1)
2051 mux
= ucontrol
->value
.enumerated
.item
[0];
2052 val
= e
->values
[ucontrol
->value
.enumerated
.item
[0]] << e
->shift_l
;
2053 mask
= e
->mask
<< e
->shift_l
;
2054 if (e
->shift_l
!= e
->shift_r
) {
2055 if (ucontrol
->value
.enumerated
.item
[1] > e
->max
- 1)
2057 val
|= e
->values
[ucontrol
->value
.enumerated
.item
[1]] << e
->shift_r
;
2058 mask
|= e
->mask
<< e
->shift_r
;
2061 mutex_lock(&widget
->codec
->mutex
);
2062 widget
->value
= val
;
2063 change
= snd_soc_test_bits(widget
->codec
, e
->reg
, mask
, val
);
2065 update
.kcontrol
= kcontrol
;
2066 update
.widget
= widget
;
2067 update
.reg
= e
->reg
;
2070 widget
->dapm
->update
= &update
;
2072 dapm_mux_update_power(widget
, kcontrol
, change
, mux
, e
);
2074 widget
->dapm
->update
= NULL
;
2076 mutex_unlock(&widget
->codec
->mutex
);
2079 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double
);
2082 * snd_soc_dapm_info_pin_switch - Info for a pin switch
2084 * @kcontrol: mixer control
2085 * @uinfo: control element information
2087 * Callback to provide information about a pin switch control.
2089 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol
*kcontrol
,
2090 struct snd_ctl_elem_info
*uinfo
)
2092 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_BOOLEAN
;
2094 uinfo
->value
.integer
.min
= 0;
2095 uinfo
->value
.integer
.max
= 1;
2099 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch
);
2102 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
2104 * @kcontrol: mixer control
2107 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol
*kcontrol
,
2108 struct snd_ctl_elem_value
*ucontrol
)
2110 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
2111 const char *pin
= (const char *)kcontrol
->private_value
;
2113 mutex_lock(&codec
->mutex
);
2115 ucontrol
->value
.integer
.value
[0] =
2116 snd_soc_dapm_get_pin_status(&codec
->dapm
, pin
);
2118 mutex_unlock(&codec
->mutex
);
2122 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch
);
2125 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
2127 * @kcontrol: mixer control
2130 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol
*kcontrol
,
2131 struct snd_ctl_elem_value
*ucontrol
)
2133 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
2134 const char *pin
= (const char *)kcontrol
->private_value
;
2136 mutex_lock(&codec
->mutex
);
2138 if (ucontrol
->value
.integer
.value
[0])
2139 snd_soc_dapm_enable_pin(&codec
->dapm
, pin
);
2141 snd_soc_dapm_disable_pin(&codec
->dapm
, pin
);
2143 snd_soc_dapm_sync(&codec
->dapm
);
2145 mutex_unlock(&codec
->mutex
);
2149 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch
);
2152 * snd_soc_dapm_new_control - create new dapm control
2153 * @dapm: DAPM context
2154 * @widget: widget template
2156 * Creates a new dapm control based upon the template.
2158 * Returns 0 for success else error.
2160 int snd_soc_dapm_new_control(struct snd_soc_dapm_context
*dapm
,
2161 const struct snd_soc_dapm_widget
*widget
)
2163 struct snd_soc_dapm_widget
*w
;
2166 if ((w
= dapm_cnew_widget(widget
)) == NULL
)
2169 name_len
= strlen(widget
->name
) + 1;
2170 if (dapm
->codec
->name_prefix
)
2171 name_len
+= 1 + strlen(dapm
->codec
->name_prefix
);
2172 w
->name
= kmalloc(name_len
, GFP_KERNEL
);
2173 if (w
->name
== NULL
) {
2177 if (dapm
->codec
->name_prefix
)
2178 snprintf(w
->name
, name_len
, "%s %s",
2179 dapm
->codec
->name_prefix
, widget
->name
);
2181 snprintf(w
->name
, name_len
, "%s", widget
->name
);
2185 w
->codec
= dapm
->codec
;
2186 INIT_LIST_HEAD(&w
->sources
);
2187 INIT_LIST_HEAD(&w
->sinks
);
2188 INIT_LIST_HEAD(&w
->list
);
2189 list_add(&w
->list
, &dapm
->card
->widgets
);
2191 /* machine layer set ups unconnected pins and insertions */
2195 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control
);
2198 * snd_soc_dapm_new_controls - create new dapm controls
2199 * @dapm: DAPM context
2200 * @widget: widget array
2201 * @num: number of widgets
2203 * Creates new DAPM controls based upon the templates.
2205 * Returns 0 for success else error.
2207 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context
*dapm
,
2208 const struct snd_soc_dapm_widget
*widget
,
2213 for (i
= 0; i
< num
; i
++) {
2214 ret
= snd_soc_dapm_new_control(dapm
, widget
);
2217 "ASoC: Failed to create DAPM control %s: %d\n",
2225 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls
);
2227 static void soc_dapm_stream_event(struct snd_soc_dapm_context
*dapm
,
2228 const char *stream
, int event
)
2230 struct snd_soc_dapm_widget
*w
;
2232 list_for_each_entry(w
, &dapm
->card
->widgets
, list
)
2234 if (!w
->sname
|| w
->dapm
!= dapm
)
2236 dev_dbg(w
->dapm
->dev
, "widget %s\n %s stream %s event %d\n",
2237 w
->name
, w
->sname
, stream
, event
);
2238 if (strstr(w
->sname
, stream
)) {
2240 case SND_SOC_DAPM_STREAM_START
:
2243 case SND_SOC_DAPM_STREAM_STOP
:
2246 case SND_SOC_DAPM_STREAM_SUSPEND
:
2247 case SND_SOC_DAPM_STREAM_RESUME
:
2248 case SND_SOC_DAPM_STREAM_PAUSE_PUSH
:
2249 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE
:
2255 dapm_power_widgets(dapm
, event
);
2259 * snd_soc_dapm_stream_event - send a stream event to the dapm core
2260 * @rtd: PCM runtime data
2261 * @stream: stream name
2262 * @event: stream event
2264 * Sends a stream event to the dapm core. The core then makes any
2265 * necessary widget power changes.
2267 * Returns 0 for success else error.
2269 int snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime
*rtd
,
2270 const char *stream
, int event
)
2272 struct snd_soc_codec
*codec
= rtd
->codec
;
2277 mutex_lock(&codec
->mutex
);
2278 soc_dapm_stream_event(&codec
->dapm
, stream
, event
);
2279 mutex_unlock(&codec
->mutex
);
2284 * snd_soc_dapm_enable_pin - enable pin.
2285 * @dapm: DAPM context
2288 * Enables input/output pin and its parents or children widgets iff there is
2289 * a valid audio route and active audio stream.
2290 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2291 * do any widget power switching.
2293 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context
*dapm
, const char *pin
)
2295 return snd_soc_dapm_set_pin(dapm
, pin
, 1);
2297 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin
);
2300 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
2301 * @dapm: DAPM context
2304 * Enables input/output pin regardless of any other state. This is
2305 * intended for use with microphone bias supplies used in microphone
2308 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2309 * do any widget power switching.
2311 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context
*dapm
,
2314 struct snd_soc_dapm_widget
*w
;
2316 list_for_each_entry(w
, &dapm
->card
->widgets
, list
) {
2317 if (w
->dapm
!= dapm
)
2319 if (!strcmp(w
->name
, pin
)) {
2320 dev_dbg(w
->dapm
->dev
,
2321 "dapm: force enable pin %s\n", pin
);
2328 dev_err(dapm
->dev
, "dapm: unknown pin %s\n", pin
);
2331 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin
);
2334 * snd_soc_dapm_disable_pin - disable pin.
2335 * @dapm: DAPM context
2338 * Disables input/output pin and its parents or children widgets.
2339 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2340 * do any widget power switching.
2342 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context
*dapm
,
2345 return snd_soc_dapm_set_pin(dapm
, pin
, 0);
2347 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin
);
2350 * snd_soc_dapm_nc_pin - permanently disable pin.
2351 * @dapm: DAPM context
2354 * Marks the specified pin as being not connected, disabling it along
2355 * any parent or child widgets. At present this is identical to
2356 * snd_soc_dapm_disable_pin() but in future it will be extended to do
2357 * additional things such as disabling controls which only affect
2358 * paths through the pin.
2360 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2361 * do any widget power switching.
2363 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context
*dapm
, const char *pin
)
2365 return snd_soc_dapm_set_pin(dapm
, pin
, 0);
2367 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin
);
2370 * snd_soc_dapm_get_pin_status - get audio pin status
2371 * @dapm: DAPM context
2372 * @pin: audio signal pin endpoint (or start point)
2374 * Get audio pin status - connected or disconnected.
2376 * Returns 1 for connected otherwise 0.
2378 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context
*dapm
,
2381 struct snd_soc_dapm_widget
*w
;
2383 list_for_each_entry(w
, &dapm
->card
->widgets
, list
) {
2384 if (w
->dapm
!= dapm
)
2386 if (!strcmp(w
->name
, pin
))
2387 return w
->connected
;
2392 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status
);
2395 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
2396 * @dapm: DAPM context
2397 * @pin: audio signal pin endpoint (or start point)
2399 * Mark the given endpoint or pin as ignoring suspend. When the
2400 * system is disabled a path between two endpoints flagged as ignoring
2401 * suspend will not be disabled. The path must already be enabled via
2402 * normal means at suspend time, it will not be turned on if it was not
2405 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context
*dapm
,
2408 struct snd_soc_dapm_widget
*w
;
2410 list_for_each_entry(w
, &dapm
->card
->widgets
, list
) {
2411 if (w
->dapm
!= dapm
)
2413 if (!strcmp(w
->name
, pin
)) {
2414 w
->ignore_suspend
= 1;
2419 dev_err(dapm
->dev
, "dapm: unknown pin %s\n", pin
);
2422 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend
);
2425 * snd_soc_dapm_free - free dapm resources
2428 * Free all dapm widgets and resources.
2430 void snd_soc_dapm_free(struct snd_soc_dapm_context
*dapm
)
2432 snd_soc_dapm_sys_remove(dapm
->dev
);
2433 dapm_free_widgets(dapm
);
2434 list_del(&dapm
->list
);
2436 EXPORT_SYMBOL_GPL(snd_soc_dapm_free
);
2438 static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context
*dapm
)
2440 struct snd_soc_dapm_widget
*w
;
2441 LIST_HEAD(down_list
);
2444 list_for_each_entry(w
, &dapm
->card
->widgets
, list
) {
2445 if (w
->dapm
!= dapm
)
2448 dapm_seq_insert(w
, &down_list
, false);
2454 /* If there were no widgets to power down we're already in
2458 snd_soc_dapm_set_bias_level(dapm
, SND_SOC_BIAS_PREPARE
);
2459 dapm_seq_run(dapm
, &down_list
, 0, false);
2460 snd_soc_dapm_set_bias_level(dapm
, SND_SOC_BIAS_STANDBY
);
2465 * snd_soc_dapm_shutdown - callback for system shutdown
2467 void snd_soc_dapm_shutdown(struct snd_soc_card
*card
)
2469 struct snd_soc_codec
*codec
;
2471 list_for_each_entry(codec
, &card
->codec_dev_list
, list
) {
2472 soc_dapm_shutdown_codec(&codec
->dapm
);
2473 snd_soc_dapm_set_bias_level(&codec
->dapm
, SND_SOC_BIAS_OFF
);
2477 /* Module information */
2478 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2479 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
2480 MODULE_LICENSE("GPL");