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/delay.h>
37 #include <linux/bitops.h>
38 #include <linux/platform_device.h>
39 #include <linux/jiffies.h>
40 #include <linux/debugfs.h>
41 #include <linux/slab.h>
42 #include <sound/core.h>
43 #include <sound/pcm.h>
44 #include <sound/pcm_params.h>
45 #include <sound/soc.h>
46 #include <sound/soc-dapm.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_value_mux
] = 5,
61 [snd_soc_dapm_dac
] = 6,
62 [snd_soc_dapm_mixer
] = 7,
63 [snd_soc_dapm_mixer_named_ctl
] = 7,
64 [snd_soc_dapm_pga
] = 8,
65 [snd_soc_dapm_adc
] = 9,
66 [snd_soc_dapm_hp
] = 10,
67 [snd_soc_dapm_spk
] = 10,
68 [snd_soc_dapm_post
] = 11,
71 static int dapm_down_seq
[] = {
72 [snd_soc_dapm_pre
] = 0,
73 [snd_soc_dapm_adc
] = 1,
74 [snd_soc_dapm_hp
] = 2,
75 [snd_soc_dapm_spk
] = 2,
76 [snd_soc_dapm_pga
] = 4,
77 [snd_soc_dapm_mixer_named_ctl
] = 5,
78 [snd_soc_dapm_mixer
] = 5,
79 [snd_soc_dapm_dac
] = 6,
80 [snd_soc_dapm_mic
] = 7,
81 [snd_soc_dapm_micbias
] = 8,
82 [snd_soc_dapm_mux
] = 9,
83 [snd_soc_dapm_value_mux
] = 9,
84 [snd_soc_dapm_aif_in
] = 10,
85 [snd_soc_dapm_aif_out
] = 10,
86 [snd_soc_dapm_supply
] = 11,
87 [snd_soc_dapm_post
] = 12,
90 static void pop_wait(u32 pop_time
)
93 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time
));
96 static void pop_dbg(struct device
*dev
, u32 pop_time
, const char *fmt
, ...)
104 buf
= kmalloc(PAGE_SIZE
, GFP_KERNEL
);
109 vsnprintf(buf
, PAGE_SIZE
, fmt
, args
);
116 /* create a new dapm widget */
117 static inline struct snd_soc_dapm_widget
*dapm_cnew_widget(
118 const struct snd_soc_dapm_widget
*_widget
)
120 return kmemdup(_widget
, sizeof(*_widget
), GFP_KERNEL
);
124 * snd_soc_dapm_set_bias_level - set the bias level for the system
125 * @card: audio device
126 * @level: level to configure
128 * Configure the bias (power) levels for the SoC audio device.
130 * Returns 0 for success else error.
132 static int snd_soc_dapm_set_bias_level(struct snd_soc_card
*card
,
133 struct snd_soc_dapm_context
*dapm
,
134 enum snd_soc_bias_level level
)
139 case SND_SOC_BIAS_ON
:
140 dev_dbg(dapm
->dev
, "Setting full bias\n");
142 case SND_SOC_BIAS_PREPARE
:
143 dev_dbg(dapm
->dev
, "Setting bias prepare\n");
145 case SND_SOC_BIAS_STANDBY
:
146 dev_dbg(dapm
->dev
, "Setting standby bias\n");
148 case SND_SOC_BIAS_OFF
:
149 dev_dbg(dapm
->dev
, "Setting bias off\n");
152 dev_err(dapm
->dev
, "Setting invalid bias %d\n", level
);
156 trace_snd_soc_bias_level_start(card
, level
);
158 if (card
&& card
->set_bias_level
)
159 ret
= card
->set_bias_level(card
, level
);
161 if (dapm
->codec
&& dapm
->codec
->driver
->set_bias_level
)
162 ret
= dapm
->codec
->driver
->set_bias_level(dapm
->codec
, level
);
164 dapm
->bias_level
= level
;
167 trace_snd_soc_bias_level_done(card
, level
);
172 /* set up initial codec paths */
173 static void dapm_set_path_status(struct snd_soc_dapm_widget
*w
,
174 struct snd_soc_dapm_path
*p
, int i
)
177 case snd_soc_dapm_switch
:
178 case snd_soc_dapm_mixer
:
179 case snd_soc_dapm_mixer_named_ctl
: {
181 struct soc_mixer_control
*mc
= (struct soc_mixer_control
*)
182 w
->kcontrols
[i
].private_value
;
183 unsigned int reg
= mc
->reg
;
184 unsigned int shift
= mc
->shift
;
186 unsigned int mask
= (1 << fls(max
)) - 1;
187 unsigned int invert
= mc
->invert
;
189 val
= snd_soc_read(w
->codec
, reg
);
190 val
= (val
>> shift
) & mask
;
192 if ((invert
&& !val
) || (!invert
&& val
))
198 case snd_soc_dapm_mux
: {
199 struct soc_enum
*e
= (struct soc_enum
*)w
->kcontrols
[i
].private_value
;
200 int val
, item
, bitmask
;
202 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
204 val
= snd_soc_read(w
->codec
, e
->reg
);
205 item
= (val
>> e
->shift_l
) & (bitmask
- 1);
208 for (i
= 0; i
< e
->max
; i
++) {
209 if (!(strcmp(p
->name
, e
->texts
[i
])) && item
== i
)
214 case snd_soc_dapm_value_mux
: {
215 struct soc_enum
*e
= (struct soc_enum
*)
216 w
->kcontrols
[i
].private_value
;
219 val
= snd_soc_read(w
->codec
, e
->reg
);
220 val
= (val
>> e
->shift_l
) & e
->mask
;
221 for (item
= 0; item
< e
->max
; item
++) {
222 if (val
== e
->values
[item
])
227 for (i
= 0; i
< e
->max
; i
++) {
228 if (!(strcmp(p
->name
, e
->texts
[i
])) && item
== i
)
233 /* does not effect routing - always connected */
234 case snd_soc_dapm_pga
:
235 case snd_soc_dapm_output
:
236 case snd_soc_dapm_adc
:
237 case snd_soc_dapm_input
:
238 case snd_soc_dapm_dac
:
239 case snd_soc_dapm_micbias
:
240 case snd_soc_dapm_vmid
:
241 case snd_soc_dapm_supply
:
242 case snd_soc_dapm_aif_in
:
243 case snd_soc_dapm_aif_out
:
246 /* does effect routing - dynamically connected */
247 case snd_soc_dapm_hp
:
248 case snd_soc_dapm_mic
:
249 case snd_soc_dapm_spk
:
250 case snd_soc_dapm_line
:
251 case snd_soc_dapm_pre
:
252 case snd_soc_dapm_post
:
258 /* connect mux widget to its interconnecting audio paths */
259 static int dapm_connect_mux(struct snd_soc_dapm_context
*dapm
,
260 struct snd_soc_dapm_widget
*src
, struct snd_soc_dapm_widget
*dest
,
261 struct snd_soc_dapm_path
*path
, const char *control_name
,
262 const struct snd_kcontrol_new
*kcontrol
)
264 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
267 for (i
= 0; i
< e
->max
; i
++) {
268 if (!(strcmp(control_name
, e
->texts
[i
]))) {
269 list_add(&path
->list
, &dapm
->paths
);
270 list_add(&path
->list_sink
, &dest
->sources
);
271 list_add(&path
->list_source
, &src
->sinks
);
272 path
->name
= (char*)e
->texts
[i
];
273 dapm_set_path_status(dest
, path
, 0);
281 /* connect mixer widget to its interconnecting audio paths */
282 static int dapm_connect_mixer(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
)
288 /* search for mixer kcontrol */
289 for (i
= 0; i
< dest
->num_kcontrols
; i
++) {
290 if (!strcmp(control_name
, dest
->kcontrols
[i
].name
)) {
291 list_add(&path
->list
, &dapm
->paths
);
292 list_add(&path
->list_sink
, &dest
->sources
);
293 list_add(&path
->list_source
, &src
->sinks
);
294 path
->name
= dest
->kcontrols
[i
].name
;
295 dapm_set_path_status(dest
, path
, i
);
302 /* update dapm codec register bits */
303 static int dapm_update_bits(struct snd_soc_dapm_widget
*widget
)
306 unsigned int old
, new;
307 struct snd_soc_codec
*codec
= widget
->codec
;
308 struct snd_soc_dapm_context
*dapm
= widget
->dapm
;
309 struct snd_soc_card
*card
= dapm
->card
;
311 /* check for valid widgets */
312 if (widget
->reg
< 0 || widget
->id
== snd_soc_dapm_input
||
313 widget
->id
== snd_soc_dapm_output
||
314 widget
->id
== snd_soc_dapm_hp
||
315 widget
->id
== snd_soc_dapm_mic
||
316 widget
->id
== snd_soc_dapm_line
||
317 widget
->id
== snd_soc_dapm_spk
)
320 power
= widget
->power
;
322 power
= (power
? 0:1);
324 old
= snd_soc_read(codec
, widget
->reg
);
325 new = (old
& ~(0x1 << widget
->shift
)) | (power
<< widget
->shift
);
329 pop_dbg(dapm
->dev
, card
->pop_time
,
330 "pop test %s : %s in %d ms\n",
331 widget
->name
, widget
->power
? "on" : "off",
333 pop_wait(card
->pop_time
);
334 snd_soc_write(codec
, widget
->reg
, new);
336 dev_dbg(dapm
->dev
, "reg %x old %x new %x change %d\n", widget
->reg
,
341 /* create new dapm mixer control */
342 static int dapm_new_mixer(struct snd_soc_dapm_context
*dapm
,
343 struct snd_soc_dapm_widget
*w
)
347 struct snd_soc_dapm_path
*path
;
348 struct snd_card
*card
= dapm
->codec
->card
->snd_card
;
351 for (i
= 0; i
< w
->num_kcontrols
; i
++) {
354 list_for_each_entry(path
, &w
->sources
, list_sink
) {
356 /* mixer/mux paths name must match control name */
357 if (path
->name
!= (char*)w
->kcontrols
[i
].name
)
360 /* add dapm control with long name.
361 * for dapm_mixer this is the concatenation of the
362 * mixer and kcontrol name.
363 * for dapm_mixer_named_ctl this is simply the
366 name_len
= strlen(w
->kcontrols
[i
].name
) + 1;
367 if (w
->id
!= snd_soc_dapm_mixer_named_ctl
)
368 name_len
+= 1 + strlen(w
->name
);
370 path
->long_name
= kmalloc(name_len
, GFP_KERNEL
);
372 if (path
->long_name
== NULL
)
377 snprintf(path
->long_name
, name_len
, "%s %s",
378 w
->name
, w
->kcontrols
[i
].name
);
380 case snd_soc_dapm_mixer_named_ctl
:
381 snprintf(path
->long_name
, name_len
, "%s",
382 w
->kcontrols
[i
].name
);
386 path
->long_name
[name_len
- 1] = '\0';
388 path
->kcontrol
= snd_soc_cnew(&w
->kcontrols
[i
], w
,
390 ret
= snd_ctl_add(card
, path
->kcontrol
);
393 "asoc: failed to add dapm kcontrol %s: %d\n",
394 path
->long_name
, ret
);
395 kfree(path
->long_name
);
396 path
->long_name
= NULL
;
404 /* create new dapm mux control */
405 static int dapm_new_mux(struct snd_soc_dapm_context
*dapm
,
406 struct snd_soc_dapm_widget
*w
)
408 struct snd_soc_dapm_path
*path
= NULL
;
409 struct snd_kcontrol
*kcontrol
;
410 struct snd_card
*card
= dapm
->codec
->card
->snd_card
;
413 if (!w
->num_kcontrols
) {
414 dev_err(dapm
->dev
, "asoc: mux %s has no controls\n", w
->name
);
418 kcontrol
= snd_soc_cnew(&w
->kcontrols
[0], w
, w
->name
);
419 ret
= snd_ctl_add(card
, kcontrol
);
424 list_for_each_entry(path
, &w
->sources
, list_sink
)
425 path
->kcontrol
= kcontrol
;
430 dev_err(dapm
->dev
, "asoc: failed to add kcontrol %s\n", w
->name
);
434 /* create new dapm volume control */
435 static int dapm_new_pga(struct snd_soc_dapm_context
*dapm
,
436 struct snd_soc_dapm_widget
*w
)
438 if (w
->num_kcontrols
)
439 dev_err(w
->dapm
->dev
,
440 "asoc: PGA controls not supported: '%s'\n", w
->name
);
445 /* reset 'walked' bit for each dapm path */
446 static inline void dapm_clear_walk(struct snd_soc_dapm_context
*dapm
)
448 struct snd_soc_dapm_path
*p
;
450 list_for_each_entry(p
, &dapm
->paths
, list
)
454 /* We implement power down on suspend by checking the power state of
455 * the ALSA card - when we are suspending the ALSA state for the card
458 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget
*widget
)
460 int level
= snd_power_get_state(widget
->dapm
->codec
->card
->snd_card
);
463 case SNDRV_CTL_POWER_D3hot
:
464 case SNDRV_CTL_POWER_D3cold
:
465 if (widget
->ignore_suspend
)
466 dev_dbg(widget
->dapm
->dev
, "%s ignoring suspend\n",
468 return widget
->ignore_suspend
;
475 * Recursively check for a completed path to an active or physically connected
476 * output widget. Returns number of complete paths.
478 static int is_connected_output_ep(struct snd_soc_dapm_widget
*widget
)
480 struct snd_soc_dapm_path
*path
;
483 if (widget
->id
== snd_soc_dapm_supply
)
486 switch (widget
->id
) {
487 case snd_soc_dapm_adc
:
488 case snd_soc_dapm_aif_out
:
490 return snd_soc_dapm_suspend_check(widget
);
495 if (widget
->connected
) {
496 /* connected pin ? */
497 if (widget
->id
== snd_soc_dapm_output
&& !widget
->ext
)
498 return snd_soc_dapm_suspend_check(widget
);
500 /* connected jack or spk ? */
501 if (widget
->id
== snd_soc_dapm_hp
|| widget
->id
== snd_soc_dapm_spk
||
502 (widget
->id
== snd_soc_dapm_line
&& !list_empty(&widget
->sources
)))
503 return snd_soc_dapm_suspend_check(widget
);
506 list_for_each_entry(path
, &widget
->sinks
, list_source
) {
510 if (path
->sink
&& path
->connect
) {
512 con
+= is_connected_output_ep(path
->sink
);
520 * Recursively check for a completed path to an active or physically connected
521 * input widget. Returns number of complete paths.
523 static int is_connected_input_ep(struct snd_soc_dapm_widget
*widget
)
525 struct snd_soc_dapm_path
*path
;
528 if (widget
->id
== snd_soc_dapm_supply
)
531 /* active stream ? */
532 switch (widget
->id
) {
533 case snd_soc_dapm_dac
:
534 case snd_soc_dapm_aif_in
:
536 return snd_soc_dapm_suspend_check(widget
);
541 if (widget
->connected
) {
542 /* connected pin ? */
543 if (widget
->id
== snd_soc_dapm_input
&& !widget
->ext
)
544 return snd_soc_dapm_suspend_check(widget
);
546 /* connected VMID/Bias for lower pops */
547 if (widget
->id
== snd_soc_dapm_vmid
)
548 return snd_soc_dapm_suspend_check(widget
);
550 /* connected jack ? */
551 if (widget
->id
== snd_soc_dapm_mic
||
552 (widget
->id
== snd_soc_dapm_line
&& !list_empty(&widget
->sinks
)))
553 return snd_soc_dapm_suspend_check(widget
);
556 list_for_each_entry(path
, &widget
->sources
, list_sink
) {
560 if (path
->source
&& path
->connect
) {
562 con
+= is_connected_input_ep(path
->source
);
570 * Handler for generic register modifier widget.
572 int dapm_reg_event(struct snd_soc_dapm_widget
*w
,
573 struct snd_kcontrol
*kcontrol
, int event
)
577 if (SND_SOC_DAPM_EVENT_ON(event
))
582 snd_soc_update_bits(w
->codec
, -(w
->reg
+ 1),
583 w
->mask
<< w
->shift
, val
<< w
->shift
);
587 EXPORT_SYMBOL_GPL(dapm_reg_event
);
589 /* Standard power change method, used to apply power changes to most
592 static int dapm_generic_apply_power(struct snd_soc_dapm_widget
*w
)
596 /* call any power change event handlers */
598 dev_dbg(w
->dapm
->dev
, "power %s event for %s flags %x\n",
599 w
->power
? "on" : "off",
600 w
->name
, w
->event_flags
);
602 /* power up pre event */
603 if (w
->power
&& w
->event
&&
604 (w
->event_flags
& SND_SOC_DAPM_PRE_PMU
)) {
605 ret
= w
->event(w
, NULL
, SND_SOC_DAPM_PRE_PMU
);
610 /* power down pre event */
611 if (!w
->power
&& w
->event
&&
612 (w
->event_flags
& SND_SOC_DAPM_PRE_PMD
)) {
613 ret
= w
->event(w
, NULL
, SND_SOC_DAPM_PRE_PMD
);
620 /* power up post event */
621 if (w
->power
&& w
->event
&&
622 (w
->event_flags
& SND_SOC_DAPM_POST_PMU
)) {
624 NULL
, SND_SOC_DAPM_POST_PMU
);
629 /* power down post event */
630 if (!w
->power
&& w
->event
&&
631 (w
->event_flags
& SND_SOC_DAPM_POST_PMD
)) {
632 ret
= w
->event(w
, NULL
, SND_SOC_DAPM_POST_PMD
);
640 /* Generic check to see if a widget should be powered.
642 static int dapm_generic_check_power(struct snd_soc_dapm_widget
*w
)
646 in
= is_connected_input_ep(w
);
647 dapm_clear_walk(w
->dapm
);
648 out
= is_connected_output_ep(w
);
649 dapm_clear_walk(w
->dapm
);
650 return out
!= 0 && in
!= 0;
653 /* Check to see if an ADC has power */
654 static int dapm_adc_check_power(struct snd_soc_dapm_widget
*w
)
659 in
= is_connected_input_ep(w
);
660 dapm_clear_walk(w
->dapm
);
663 return dapm_generic_check_power(w
);
667 /* Check to see if a DAC has power */
668 static int dapm_dac_check_power(struct snd_soc_dapm_widget
*w
)
673 out
= is_connected_output_ep(w
);
674 dapm_clear_walk(w
->dapm
);
677 return dapm_generic_check_power(w
);
681 /* Check to see if a power supply is needed */
682 static int dapm_supply_check_power(struct snd_soc_dapm_widget
*w
)
684 struct snd_soc_dapm_path
*path
;
687 /* Check if one of our outputs is connected */
688 list_for_each_entry(path
, &w
->sinks
, list_source
) {
689 if (path
->connected
&&
690 !path
->connected(path
->source
, path
->sink
))
693 if (path
->sink
&& path
->sink
->power_check
&&
694 path
->sink
->power_check(path
->sink
)) {
700 dapm_clear_walk(w
->dapm
);
705 static int dapm_seq_compare(struct snd_soc_dapm_widget
*a
,
706 struct snd_soc_dapm_widget
*b
,
709 if (sort
[a
->id
] != sort
[b
->id
])
710 return sort
[a
->id
] - sort
[b
->id
];
711 if (a
->reg
!= b
->reg
)
712 return a
->reg
- b
->reg
;
713 if (a
->codec
!= b
->codec
)
714 return (unsigned long)a
->codec
- (unsigned long)b
->codec
;
719 /* Insert a widget in order into a DAPM power sequence. */
720 static void dapm_seq_insert(struct snd_soc_dapm_widget
*new_widget
,
721 struct list_head
*list
,
724 struct snd_soc_dapm_widget
*w
;
726 list_for_each_entry(w
, list
, power_list
)
727 if (dapm_seq_compare(new_widget
, w
, sort
) < 0) {
728 list_add_tail(&new_widget
->power_list
, &w
->power_list
);
732 list_add_tail(&new_widget
->power_list
, list
);
735 static void dapm_seq_check_event(struct snd_soc_dapm_context
*dapm
,
736 struct snd_soc_dapm_widget
*w
, int event
)
738 struct snd_soc_card
*card
= dapm
->card
;
743 case SND_SOC_DAPM_PRE_PMU
:
747 case SND_SOC_DAPM_POST_PMU
:
748 ev_name
= "POST_PMU";
751 case SND_SOC_DAPM_PRE_PMD
:
755 case SND_SOC_DAPM_POST_PMD
:
756 ev_name
= "POST_PMD";
764 if (w
->power
!= power
)
767 if (w
->event
&& (w
->event_flags
& event
)) {
768 pop_dbg(dapm
->dev
, card
->pop_time
, "pop test : %s %s\n",
770 trace_snd_soc_dapm_widget_event_start(w
, event
);
771 ret
= w
->event(w
, NULL
, event
);
772 trace_snd_soc_dapm_widget_event_done(w
, event
);
774 pr_err("%s: %s event failed: %d\n",
775 ev_name
, w
->name
, ret
);
779 /* Apply the coalesced changes from a DAPM sequence */
780 static void dapm_seq_run_coalesced(struct snd_soc_dapm_context
*dapm
,
781 struct list_head
*pending
)
783 struct snd_soc_card
*card
= dapm
->card
;
784 struct snd_soc_dapm_widget
*w
;
786 unsigned int value
= 0;
787 unsigned int mask
= 0;
788 unsigned int cur_mask
;
790 reg
= list_first_entry(pending
, struct snd_soc_dapm_widget
,
793 list_for_each_entry(w
, pending
, power_list
) {
794 cur_mask
= 1 << w
->shift
;
795 BUG_ON(reg
!= w
->reg
);
806 pop_dbg(dapm
->dev
, card
->pop_time
,
807 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
808 w
->name
, reg
, value
, mask
);
810 /* Check for events */
811 dapm_seq_check_event(dapm
, w
, SND_SOC_DAPM_PRE_PMU
);
812 dapm_seq_check_event(dapm
, w
, SND_SOC_DAPM_PRE_PMD
);
816 pop_dbg(dapm
->dev
, card
->pop_time
,
817 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
818 value
, mask
, reg
, card
->pop_time
);
819 pop_wait(card
->pop_time
);
820 snd_soc_update_bits(dapm
->codec
, reg
, mask
, value
);
823 list_for_each_entry(w
, pending
, power_list
) {
824 dapm_seq_check_event(dapm
, w
, SND_SOC_DAPM_POST_PMU
);
825 dapm_seq_check_event(dapm
, w
, SND_SOC_DAPM_POST_PMD
);
829 /* Apply a DAPM power sequence.
831 * We walk over a pre-sorted list of widgets to apply power to. In
832 * order to minimise the number of writes to the device required
833 * multiple widgets will be updated in a single write where possible.
834 * Currently anything that requires more than a single write is not
837 static void dapm_seq_run(struct snd_soc_dapm_context
*dapm
,
838 struct list_head
*list
, int event
, int sort
[])
840 struct snd_soc_dapm_widget
*w
, *n
;
843 int cur_reg
= SND_SOC_NOPM
;
846 list_for_each_entry_safe(w
, n
, list
, power_list
) {
849 /* Do we need to apply any queued changes? */
850 if (sort
[w
->id
] != cur_sort
|| w
->reg
!= cur_reg
) {
851 if (!list_empty(&pending
))
852 dapm_seq_run_coalesced(dapm
, &pending
);
854 INIT_LIST_HEAD(&pending
);
856 cur_reg
= SND_SOC_NOPM
;
860 case snd_soc_dapm_pre
:
862 list_for_each_entry_safe_continue(w
, n
, list
,
865 if (event
== SND_SOC_DAPM_STREAM_START
)
867 NULL
, SND_SOC_DAPM_PRE_PMU
);
868 else if (event
== SND_SOC_DAPM_STREAM_STOP
)
870 NULL
, SND_SOC_DAPM_PRE_PMD
);
873 case snd_soc_dapm_post
:
875 list_for_each_entry_safe_continue(w
, n
, list
,
878 if (event
== SND_SOC_DAPM_STREAM_START
)
880 NULL
, SND_SOC_DAPM_POST_PMU
);
881 else if (event
== SND_SOC_DAPM_STREAM_STOP
)
883 NULL
, SND_SOC_DAPM_POST_PMD
);
886 case snd_soc_dapm_input
:
887 case snd_soc_dapm_output
:
888 case snd_soc_dapm_hp
:
889 case snd_soc_dapm_mic
:
890 case snd_soc_dapm_line
:
891 case snd_soc_dapm_spk
:
892 /* No register support currently */
893 ret
= dapm_generic_apply_power(w
);
897 /* Queue it up for application */
898 cur_sort
= sort
[w
->id
];
900 list_move(&w
->power_list
, &pending
);
905 dev_err(w
->dapm
->dev
,
906 "Failed to apply widget power: %d\n", ret
);
909 if (!list_empty(&pending
))
910 dapm_seq_run_coalesced(dapm
, &pending
);
914 * Scan each dapm widget for complete audio path.
915 * A complete path is a route that has valid endpoints i.e.:-
917 * o DAC to output pin.
918 * o Input Pin to ADC.
919 * o Input pin to Output pin (bypass, sidetone)
920 * o DAC to ADC (loopback).
922 static int dapm_power_widgets(struct snd_soc_dapm_context
*dapm
, int event
)
924 struct snd_soc_card
*card
= dapm
->codec
->card
;
925 struct snd_soc_dapm_widget
*w
;
927 LIST_HEAD(down_list
);
932 trace_snd_soc_dapm_start(card
);
934 /* Check which widgets we need to power and store them in
935 * lists indicating if they should be powered up or down.
937 list_for_each_entry(w
, &dapm
->widgets
, list
) {
939 case snd_soc_dapm_pre
:
940 dapm_seq_insert(w
, &down_list
, dapm_down_seq
);
942 case snd_soc_dapm_post
:
943 dapm_seq_insert(w
, &up_list
, dapm_up_seq
);
951 power
= w
->power_check(w
);
957 if (w
->power
== power
)
960 trace_snd_soc_dapm_widget_power(w
, power
);
963 dapm_seq_insert(w
, &up_list
, dapm_up_seq
);
965 dapm_seq_insert(w
, &down_list
, dapm_down_seq
);
972 /* If there are no DAPM widgets then try to figure out power from the
975 if (list_empty(&dapm
->widgets
)) {
977 case SND_SOC_DAPM_STREAM_START
:
978 case SND_SOC_DAPM_STREAM_RESUME
:
981 case SND_SOC_DAPM_STREAM_SUSPEND
:
984 case SND_SOC_DAPM_STREAM_NOP
:
985 switch (dapm
->bias_level
) {
986 case SND_SOC_BIAS_STANDBY
:
987 case SND_SOC_BIAS_OFF
:
1000 if (sys_power
&& dapm
->bias_level
== SND_SOC_BIAS_OFF
) {
1001 ret
= snd_soc_dapm_set_bias_level(card
, dapm
,
1002 SND_SOC_BIAS_STANDBY
);
1005 "Failed to turn on bias: %d\n", ret
);
1008 /* If we're changing to all on or all off then prepare */
1009 if ((sys_power
&& dapm
->bias_level
== SND_SOC_BIAS_STANDBY
) ||
1010 (!sys_power
&& dapm
->bias_level
== SND_SOC_BIAS_ON
)) {
1011 ret
= snd_soc_dapm_set_bias_level(card
, dapm
, SND_SOC_BIAS_PREPARE
);
1014 "Failed to prepare bias: %d\n", ret
);
1017 /* Power down widgets first; try to avoid amplifying pops. */
1018 dapm_seq_run(dapm
, &down_list
, event
, dapm_down_seq
);
1021 dapm_seq_run(dapm
, &up_list
, event
, dapm_up_seq
);
1023 /* If we just powered the last thing off drop to standby bias */
1024 if (dapm
->bias_level
== SND_SOC_BIAS_PREPARE
&& !sys_power
) {
1025 ret
= snd_soc_dapm_set_bias_level(card
, dapm
, SND_SOC_BIAS_STANDBY
);
1028 "Failed to apply standby bias: %d\n", ret
);
1031 /* If we're in standby and can support bias off then do that */
1032 if (dapm
->bias_level
== SND_SOC_BIAS_STANDBY
&&
1033 dapm
->idle_bias_off
) {
1034 ret
= snd_soc_dapm_set_bias_level(card
, dapm
, SND_SOC_BIAS_OFF
);
1037 "Failed to turn off bias: %d\n", ret
);
1040 /* If we just powered up then move to active bias */
1041 if (dapm
->bias_level
== SND_SOC_BIAS_PREPARE
&& sys_power
) {
1042 ret
= snd_soc_dapm_set_bias_level(card
, dapm
, SND_SOC_BIAS_ON
);
1045 "Failed to apply active bias: %d\n", ret
);
1048 pop_dbg(dapm
->dev
, card
->pop_time
,
1049 "DAPM sequencing finished, waiting %dms\n", card
->pop_time
);
1050 pop_wait(card
->pop_time
);
1052 trace_snd_soc_dapm_done(card
);
1057 #ifdef CONFIG_DEBUG_FS
1058 static int dapm_widget_power_open_file(struct inode
*inode
, struct file
*file
)
1060 file
->private_data
= inode
->i_private
;
1064 static ssize_t
dapm_widget_power_read_file(struct file
*file
,
1065 char __user
*user_buf
,
1066 size_t count
, loff_t
*ppos
)
1068 struct snd_soc_dapm_widget
*w
= file
->private_data
;
1072 struct snd_soc_dapm_path
*p
= NULL
;
1074 buf
= kmalloc(PAGE_SIZE
, GFP_KERNEL
);
1078 in
= is_connected_input_ep(w
);
1079 dapm_clear_walk(w
->dapm
);
1080 out
= is_connected_output_ep(w
);
1081 dapm_clear_walk(w
->dapm
);
1083 ret
= snprintf(buf
, PAGE_SIZE
, "%s: %s in %d out %d",
1084 w
->name
, w
->power
? "On" : "Off", in
, out
);
1087 ret
+= snprintf(buf
+ ret
, PAGE_SIZE
- ret
,
1088 " - R%d(0x%x) bit %d",
1089 w
->reg
, w
->reg
, w
->shift
);
1091 ret
+= snprintf(buf
+ ret
, PAGE_SIZE
- ret
, "\n");
1094 ret
+= snprintf(buf
+ ret
, PAGE_SIZE
- ret
, " stream %s %s\n",
1096 w
->active
? "active" : "inactive");
1098 list_for_each_entry(p
, &w
->sources
, list_sink
) {
1099 if (p
->connected
&& !p
->connected(w
, p
->sink
))
1103 ret
+= snprintf(buf
+ ret
, PAGE_SIZE
- ret
,
1105 p
->name
? p
->name
: "static",
1108 list_for_each_entry(p
, &w
->sinks
, list_source
) {
1109 if (p
->connected
&& !p
->connected(w
, p
->sink
))
1113 ret
+= snprintf(buf
+ ret
, PAGE_SIZE
- ret
,
1115 p
->name
? p
->name
: "static",
1119 ret
= simple_read_from_buffer(user_buf
, count
, ppos
, buf
, ret
);
1125 static const struct file_operations dapm_widget_power_fops
= {
1126 .open
= dapm_widget_power_open_file
,
1127 .read
= dapm_widget_power_read_file
,
1128 .llseek
= default_llseek
,
1131 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context
*dapm
)
1133 struct snd_soc_dapm_widget
*w
;
1136 if (!dapm
->debugfs_dapm
)
1139 list_for_each_entry(w
, &dapm
->widgets
, list
) {
1143 d
= debugfs_create_file(w
->name
, 0444,
1144 dapm
->debugfs_dapm
, w
,
1145 &dapm_widget_power_fops
);
1147 dev_warn(w
->dapm
->dev
,
1148 "ASoC: Failed to create %s debugfs file\n",
1153 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context
*dapm
)
1158 /* test and update the power status of a mux widget */
1159 static int dapm_mux_update_power(struct snd_soc_dapm_widget
*widget
,
1160 struct snd_kcontrol
*kcontrol
, int change
,
1161 int mux
, struct soc_enum
*e
)
1163 struct snd_soc_dapm_path
*path
;
1166 if (widget
->id
!= snd_soc_dapm_mux
&&
1167 widget
->id
!= snd_soc_dapm_value_mux
)
1173 /* find dapm widget path assoc with kcontrol */
1174 list_for_each_entry(path
, &widget
->dapm
->paths
, list
) {
1175 if (path
->kcontrol
!= kcontrol
)
1178 if (!path
->name
|| !e
->texts
[mux
])
1182 /* we now need to match the string in the enum to the path */
1183 if (!(strcmp(path
->name
, e
->texts
[mux
])))
1184 path
->connect
= 1; /* new connection */
1186 path
->connect
= 0; /* old connection must be powered down */
1190 dapm_power_widgets(widget
->dapm
, SND_SOC_DAPM_STREAM_NOP
);
1195 /* test and update the power status of a mixer or switch widget */
1196 static int dapm_mixer_update_power(struct snd_soc_dapm_widget
*widget
,
1197 struct snd_kcontrol
*kcontrol
, int connect
)
1199 struct snd_soc_dapm_path
*path
;
1202 if (widget
->id
!= snd_soc_dapm_mixer
&&
1203 widget
->id
!= snd_soc_dapm_mixer_named_ctl
&&
1204 widget
->id
!= snd_soc_dapm_switch
)
1207 /* find dapm widget path assoc with kcontrol */
1208 list_for_each_entry(path
, &widget
->dapm
->paths
, list
) {
1209 if (path
->kcontrol
!= kcontrol
)
1212 /* found, now check type */
1214 path
->connect
= connect
;
1219 dapm_power_widgets(widget
->dapm
, SND_SOC_DAPM_STREAM_NOP
);
1224 /* show dapm widget status in sys fs */
1225 static ssize_t
dapm_widget_show(struct device
*dev
,
1226 struct device_attribute
*attr
, char *buf
)
1228 struct snd_soc_pcm_runtime
*rtd
=
1229 container_of(dev
, struct snd_soc_pcm_runtime
, dev
);
1230 struct snd_soc_codec
*codec
=rtd
->codec
;
1231 struct snd_soc_dapm_widget
*w
;
1233 char *state
= "not set";
1235 list_for_each_entry(w
, &codec
->dapm
.widgets
, list
) {
1237 /* only display widgets that burnm power */
1239 case snd_soc_dapm_hp
:
1240 case snd_soc_dapm_mic
:
1241 case snd_soc_dapm_spk
:
1242 case snd_soc_dapm_line
:
1243 case snd_soc_dapm_micbias
:
1244 case snd_soc_dapm_dac
:
1245 case snd_soc_dapm_adc
:
1246 case snd_soc_dapm_pga
:
1247 case snd_soc_dapm_mixer
:
1248 case snd_soc_dapm_mixer_named_ctl
:
1249 case snd_soc_dapm_supply
:
1251 count
+= sprintf(buf
+ count
, "%s: %s\n",
1252 w
->name
, w
->power
? "On":"Off");
1259 switch (codec
->dapm
.bias_level
) {
1260 case SND_SOC_BIAS_ON
:
1263 case SND_SOC_BIAS_PREPARE
:
1266 case SND_SOC_BIAS_STANDBY
:
1269 case SND_SOC_BIAS_OFF
:
1273 count
+= sprintf(buf
+ count
, "PM State: %s\n", state
);
1278 static DEVICE_ATTR(dapm_widget
, 0444, dapm_widget_show
, NULL
);
1280 int snd_soc_dapm_sys_add(struct device
*dev
)
1282 return device_create_file(dev
, &dev_attr_dapm_widget
);
1285 static void snd_soc_dapm_sys_remove(struct device
*dev
)
1287 device_remove_file(dev
, &dev_attr_dapm_widget
);
1290 /* free all dapm widgets and resources */
1291 static void dapm_free_widgets(struct snd_soc_dapm_context
*dapm
)
1293 struct snd_soc_dapm_widget
*w
, *next_w
;
1294 struct snd_soc_dapm_path
*p
, *next_p
;
1296 list_for_each_entry_safe(w
, next_w
, &dapm
->widgets
, list
) {
1301 list_for_each_entry_safe(p
, next_p
, &dapm
->paths
, list
) {
1303 kfree(p
->long_name
);
1308 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context
*dapm
,
1309 const char *pin
, int status
)
1311 struct snd_soc_dapm_widget
*w
;
1313 list_for_each_entry(w
, &dapm
->widgets
, list
) {
1314 if (!strcmp(w
->name
, pin
)) {
1315 dev_dbg(w
->dapm
->dev
, "dapm: pin %s = %d\n",
1317 w
->connected
= status
;
1318 /* Allow disabling of forced pins */
1325 dev_err(dapm
->dev
, "dapm: unknown pin %s\n", pin
);
1330 * snd_soc_dapm_sync - scan and power dapm paths
1331 * @dapm: DAPM context
1333 * Walks all dapm audio paths and powers widgets according to their
1334 * stream or path usage.
1336 * Returns 0 for success.
1338 int snd_soc_dapm_sync(struct snd_soc_dapm_context
*dapm
)
1340 return dapm_power_widgets(dapm
, SND_SOC_DAPM_STREAM_NOP
);
1342 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync
);
1344 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context
*dapm
,
1345 const struct snd_soc_dapm_route
*route
)
1347 struct snd_soc_dapm_path
*path
;
1348 struct snd_soc_dapm_widget
*wsource
= NULL
, *wsink
= NULL
, *w
;
1349 const char *sink
= route
->sink
;
1350 const char *control
= route
->control
;
1351 const char *source
= route
->source
;
1354 /* find src and dest widgets */
1355 list_for_each_entry(w
, &dapm
->widgets
, list
) {
1357 if (!wsink
&& !(strcmp(w
->name
, sink
))) {
1361 if (!wsource
&& !(strcmp(w
->name
, source
))) {
1366 if (wsource
== NULL
|| wsink
== NULL
)
1369 path
= kzalloc(sizeof(struct snd_soc_dapm_path
), GFP_KERNEL
);
1373 path
->source
= wsource
;
1375 path
->connected
= route
->connected
;
1376 INIT_LIST_HEAD(&path
->list
);
1377 INIT_LIST_HEAD(&path
->list_source
);
1378 INIT_LIST_HEAD(&path
->list_sink
);
1380 /* check for external widgets */
1381 if (wsink
->id
== snd_soc_dapm_input
) {
1382 if (wsource
->id
== snd_soc_dapm_micbias
||
1383 wsource
->id
== snd_soc_dapm_mic
||
1384 wsource
->id
== snd_soc_dapm_line
||
1385 wsource
->id
== snd_soc_dapm_output
)
1388 if (wsource
->id
== snd_soc_dapm_output
) {
1389 if (wsink
->id
== snd_soc_dapm_spk
||
1390 wsink
->id
== snd_soc_dapm_hp
||
1391 wsink
->id
== snd_soc_dapm_line
||
1392 wsink
->id
== snd_soc_dapm_input
)
1396 /* connect static paths */
1397 if (control
== NULL
) {
1398 list_add(&path
->list
, &dapm
->paths
);
1399 list_add(&path
->list_sink
, &wsink
->sources
);
1400 list_add(&path
->list_source
, &wsource
->sinks
);
1405 /* connect dynamic paths */
1407 case snd_soc_dapm_adc
:
1408 case snd_soc_dapm_dac
:
1409 case snd_soc_dapm_pga
:
1410 case snd_soc_dapm_input
:
1411 case snd_soc_dapm_output
:
1412 case snd_soc_dapm_micbias
:
1413 case snd_soc_dapm_vmid
:
1414 case snd_soc_dapm_pre
:
1415 case snd_soc_dapm_post
:
1416 case snd_soc_dapm_supply
:
1417 case snd_soc_dapm_aif_in
:
1418 case snd_soc_dapm_aif_out
:
1419 list_add(&path
->list
, &dapm
->paths
);
1420 list_add(&path
->list_sink
, &wsink
->sources
);
1421 list_add(&path
->list_source
, &wsource
->sinks
);
1424 case snd_soc_dapm_mux
:
1425 case snd_soc_dapm_value_mux
:
1426 ret
= dapm_connect_mux(dapm
, wsource
, wsink
, path
, control
,
1427 &wsink
->kcontrols
[0]);
1431 case snd_soc_dapm_switch
:
1432 case snd_soc_dapm_mixer
:
1433 case snd_soc_dapm_mixer_named_ctl
:
1434 ret
= dapm_connect_mixer(dapm
, wsource
, wsink
, path
, control
);
1438 case snd_soc_dapm_hp
:
1439 case snd_soc_dapm_mic
:
1440 case snd_soc_dapm_line
:
1441 case snd_soc_dapm_spk
:
1442 list_add(&path
->list
, &dapm
->paths
);
1443 list_add(&path
->list_sink
, &wsink
->sources
);
1444 list_add(&path
->list_source
, &wsource
->sinks
);
1451 dev_warn(dapm
->dev
, "asoc: no dapm match for %s --> %s --> %s\n",
1452 source
, control
, sink
);
1458 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1459 * @dapm: DAPM context
1460 * @route: audio routes
1461 * @num: number of routes
1463 * Connects 2 dapm widgets together via a named audio path. The sink is
1464 * the widget receiving the audio signal, whilst the source is the sender
1465 * of the audio signal.
1467 * Returns 0 for success else error. On error all resources can be freed
1468 * with a call to snd_soc_card_free().
1470 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context
*dapm
,
1471 const struct snd_soc_dapm_route
*route
, int num
)
1475 for (i
= 0; i
< num
; i
++) {
1476 ret
= snd_soc_dapm_add_route(dapm
, route
);
1478 dev_err(dapm
->dev
, "Failed to add route %s->%s\n",
1479 route
->source
, route
->sink
);
1487 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes
);
1490 * snd_soc_dapm_new_widgets - add new dapm widgets
1491 * @dapm: DAPM context
1493 * Checks the codec for any new dapm widgets and creates them if found.
1495 * Returns 0 for success.
1497 int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context
*dapm
)
1499 struct snd_soc_dapm_widget
*w
;
1501 list_for_each_entry(w
, &dapm
->widgets
, list
)
1507 case snd_soc_dapm_switch
:
1508 case snd_soc_dapm_mixer
:
1509 case snd_soc_dapm_mixer_named_ctl
:
1510 w
->power_check
= dapm_generic_check_power
;
1511 dapm_new_mixer(dapm
, w
);
1513 case snd_soc_dapm_mux
:
1514 case snd_soc_dapm_value_mux
:
1515 w
->power_check
= dapm_generic_check_power
;
1516 dapm_new_mux(dapm
, w
);
1518 case snd_soc_dapm_adc
:
1519 case snd_soc_dapm_aif_out
:
1520 w
->power_check
= dapm_adc_check_power
;
1522 case snd_soc_dapm_dac
:
1523 case snd_soc_dapm_aif_in
:
1524 w
->power_check
= dapm_dac_check_power
;
1526 case snd_soc_dapm_pga
:
1527 w
->power_check
= dapm_generic_check_power
;
1528 dapm_new_pga(dapm
, w
);
1530 case snd_soc_dapm_input
:
1531 case snd_soc_dapm_output
:
1532 case snd_soc_dapm_micbias
:
1533 case snd_soc_dapm_spk
:
1534 case snd_soc_dapm_hp
:
1535 case snd_soc_dapm_mic
:
1536 case snd_soc_dapm_line
:
1537 w
->power_check
= dapm_generic_check_power
;
1539 case snd_soc_dapm_supply
:
1540 w
->power_check
= dapm_supply_check_power
;
1541 case snd_soc_dapm_vmid
:
1542 case snd_soc_dapm_pre
:
1543 case snd_soc_dapm_post
:
1549 dapm_power_widgets(dapm
, SND_SOC_DAPM_STREAM_NOP
);
1552 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets
);
1555 * snd_soc_dapm_get_volsw - dapm mixer get callback
1556 * @kcontrol: mixer control
1557 * @ucontrol: control element information
1559 * Callback to get the value of a dapm mixer control.
1561 * Returns 0 for success.
1563 int snd_soc_dapm_get_volsw(struct snd_kcontrol
*kcontrol
,
1564 struct snd_ctl_elem_value
*ucontrol
)
1566 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1567 struct soc_mixer_control
*mc
=
1568 (struct soc_mixer_control
*)kcontrol
->private_value
;
1569 unsigned int reg
= mc
->reg
;
1570 unsigned int shift
= mc
->shift
;
1571 unsigned int rshift
= mc
->rshift
;
1573 unsigned int invert
= mc
->invert
;
1574 unsigned int mask
= (1 << fls(max
)) - 1;
1576 ucontrol
->value
.integer
.value
[0] =
1577 (snd_soc_read(widget
->codec
, reg
) >> shift
) & mask
;
1578 if (shift
!= rshift
)
1579 ucontrol
->value
.integer
.value
[1] =
1580 (snd_soc_read(widget
->codec
, reg
) >> rshift
) & mask
;
1582 ucontrol
->value
.integer
.value
[0] =
1583 max
- ucontrol
->value
.integer
.value
[0];
1584 if (shift
!= rshift
)
1585 ucontrol
->value
.integer
.value
[1] =
1586 max
- ucontrol
->value
.integer
.value
[1];
1591 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw
);
1594 * snd_soc_dapm_put_volsw - dapm mixer set callback
1595 * @kcontrol: mixer control
1596 * @ucontrol: control element information
1598 * Callback to set the value of a dapm mixer control.
1600 * Returns 0 for success.
1602 int snd_soc_dapm_put_volsw(struct snd_kcontrol
*kcontrol
,
1603 struct snd_ctl_elem_value
*ucontrol
)
1605 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1606 struct soc_mixer_control
*mc
=
1607 (struct soc_mixer_control
*)kcontrol
->private_value
;
1608 unsigned int reg
= mc
->reg
;
1609 unsigned int shift
= mc
->shift
;
1610 unsigned int rshift
= mc
->rshift
;
1612 unsigned int mask
= (1 << fls(max
)) - 1;
1613 unsigned int invert
= mc
->invert
;
1614 unsigned int val
, val2
, val_mask
;
1618 val
= (ucontrol
->value
.integer
.value
[0] & mask
);
1622 val_mask
= mask
<< shift
;
1624 if (shift
!= rshift
) {
1625 val2
= (ucontrol
->value
.integer
.value
[1] & mask
);
1628 val_mask
|= mask
<< rshift
;
1629 val
|= val2
<< rshift
;
1632 mutex_lock(&widget
->codec
->mutex
);
1633 widget
->value
= val
;
1635 if (snd_soc_test_bits(widget
->codec
, reg
, val_mask
, val
)) {
1637 /* new connection */
1638 connect
= invert
? 0:1;
1640 /* old connection must be powered down */
1641 connect
= invert
? 1:0;
1643 dapm_mixer_update_power(widget
, kcontrol
, connect
);
1646 if (widget
->event
) {
1647 if (widget
->event_flags
& SND_SOC_DAPM_PRE_REG
) {
1648 ret
= widget
->event(widget
, kcontrol
,
1649 SND_SOC_DAPM_PRE_REG
);
1655 ret
= snd_soc_update_bits(widget
->codec
, reg
, val_mask
, val
);
1656 if (widget
->event_flags
& SND_SOC_DAPM_POST_REG
)
1657 ret
= widget
->event(widget
, kcontrol
,
1658 SND_SOC_DAPM_POST_REG
);
1660 ret
= snd_soc_update_bits(widget
->codec
, reg
, val_mask
, val
);
1663 mutex_unlock(&widget
->codec
->mutex
);
1666 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw
);
1669 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
1670 * @kcontrol: mixer control
1671 * @ucontrol: control element information
1673 * Callback to get the value of a dapm enumerated double mixer control.
1675 * Returns 0 for success.
1677 int snd_soc_dapm_get_enum_double(struct snd_kcontrol
*kcontrol
,
1678 struct snd_ctl_elem_value
*ucontrol
)
1680 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1681 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1682 unsigned int val
, bitmask
;
1684 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
1686 val
= snd_soc_read(widget
->codec
, e
->reg
);
1687 ucontrol
->value
.enumerated
.item
[0] = (val
>> e
->shift_l
) & (bitmask
- 1);
1688 if (e
->shift_l
!= e
->shift_r
)
1689 ucontrol
->value
.enumerated
.item
[1] =
1690 (val
>> e
->shift_r
) & (bitmask
- 1);
1694 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double
);
1697 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
1698 * @kcontrol: mixer control
1699 * @ucontrol: control element information
1701 * Callback to set the value of a dapm enumerated double mixer control.
1703 * Returns 0 for success.
1705 int snd_soc_dapm_put_enum_double(struct snd_kcontrol
*kcontrol
,
1706 struct snd_ctl_elem_value
*ucontrol
)
1708 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1709 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1710 unsigned int val
, mux
, change
;
1711 unsigned int mask
, bitmask
;
1714 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
1716 if (ucontrol
->value
.enumerated
.item
[0] > e
->max
- 1)
1718 mux
= ucontrol
->value
.enumerated
.item
[0];
1719 val
= mux
<< e
->shift_l
;
1720 mask
= (bitmask
- 1) << e
->shift_l
;
1721 if (e
->shift_l
!= e
->shift_r
) {
1722 if (ucontrol
->value
.enumerated
.item
[1] > e
->max
- 1)
1724 val
|= ucontrol
->value
.enumerated
.item
[1] << e
->shift_r
;
1725 mask
|= (bitmask
- 1) << e
->shift_r
;
1728 mutex_lock(&widget
->codec
->mutex
);
1729 widget
->value
= val
;
1730 change
= snd_soc_test_bits(widget
->codec
, e
->reg
, mask
, val
);
1731 dapm_mux_update_power(widget
, kcontrol
, change
, mux
, e
);
1733 if (widget
->event_flags
& SND_SOC_DAPM_PRE_REG
) {
1734 ret
= widget
->event(widget
,
1735 kcontrol
, SND_SOC_DAPM_PRE_REG
);
1740 ret
= snd_soc_update_bits(widget
->codec
, e
->reg
, mask
, val
);
1742 if (widget
->event_flags
& SND_SOC_DAPM_POST_REG
)
1743 ret
= widget
->event(widget
,
1744 kcontrol
, SND_SOC_DAPM_POST_REG
);
1747 mutex_unlock(&widget
->codec
->mutex
);
1750 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double
);
1753 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
1754 * @kcontrol: mixer control
1755 * @ucontrol: control element information
1757 * Returns 0 for success.
1759 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol
*kcontrol
,
1760 struct snd_ctl_elem_value
*ucontrol
)
1762 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1764 ucontrol
->value
.enumerated
.item
[0] = widget
->value
;
1768 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt
);
1771 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
1772 * @kcontrol: mixer control
1773 * @ucontrol: control element information
1775 * Returns 0 for success.
1777 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol
*kcontrol
,
1778 struct snd_ctl_elem_value
*ucontrol
)
1780 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1781 struct soc_enum
*e
=
1782 (struct soc_enum
*)kcontrol
->private_value
;
1786 if (ucontrol
->value
.enumerated
.item
[0] >= e
->max
)
1789 mutex_lock(&widget
->codec
->mutex
);
1791 change
= widget
->value
!= ucontrol
->value
.enumerated
.item
[0];
1792 widget
->value
= ucontrol
->value
.enumerated
.item
[0];
1793 dapm_mux_update_power(widget
, kcontrol
, change
, widget
->value
, e
);
1795 mutex_unlock(&widget
->codec
->mutex
);
1798 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt
);
1801 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
1803 * @kcontrol: mixer control
1804 * @ucontrol: control element information
1806 * Callback to get the value of a dapm semi enumerated double mixer control.
1808 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1809 * used for handling bitfield coded enumeration for example.
1811 * Returns 0 for success.
1813 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol
*kcontrol
,
1814 struct snd_ctl_elem_value
*ucontrol
)
1816 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1817 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1818 unsigned int reg_val
, val
, mux
;
1820 reg_val
= snd_soc_read(widget
->codec
, e
->reg
);
1821 val
= (reg_val
>> e
->shift_l
) & e
->mask
;
1822 for (mux
= 0; mux
< e
->max
; mux
++) {
1823 if (val
== e
->values
[mux
])
1826 ucontrol
->value
.enumerated
.item
[0] = mux
;
1827 if (e
->shift_l
!= e
->shift_r
) {
1828 val
= (reg_val
>> e
->shift_r
) & e
->mask
;
1829 for (mux
= 0; mux
< e
->max
; mux
++) {
1830 if (val
== e
->values
[mux
])
1833 ucontrol
->value
.enumerated
.item
[1] = mux
;
1838 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double
);
1841 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
1843 * @kcontrol: mixer control
1844 * @ucontrol: control element information
1846 * Callback to set the value of a dapm semi enumerated double mixer control.
1848 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1849 * used for handling bitfield coded enumeration for example.
1851 * Returns 0 for success.
1853 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol
*kcontrol
,
1854 struct snd_ctl_elem_value
*ucontrol
)
1856 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1857 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1858 unsigned int val
, mux
, change
;
1862 if (ucontrol
->value
.enumerated
.item
[0] > e
->max
- 1)
1864 mux
= ucontrol
->value
.enumerated
.item
[0];
1865 val
= e
->values
[ucontrol
->value
.enumerated
.item
[0]] << e
->shift_l
;
1866 mask
= e
->mask
<< e
->shift_l
;
1867 if (e
->shift_l
!= e
->shift_r
) {
1868 if (ucontrol
->value
.enumerated
.item
[1] > e
->max
- 1)
1870 val
|= e
->values
[ucontrol
->value
.enumerated
.item
[1]] << e
->shift_r
;
1871 mask
|= e
->mask
<< e
->shift_r
;
1874 mutex_lock(&widget
->codec
->mutex
);
1875 widget
->value
= val
;
1876 change
= snd_soc_test_bits(widget
->codec
, e
->reg
, mask
, val
);
1877 dapm_mux_update_power(widget
, kcontrol
, change
, mux
, e
);
1879 if (widget
->event_flags
& SND_SOC_DAPM_PRE_REG
) {
1880 ret
= widget
->event(widget
,
1881 kcontrol
, SND_SOC_DAPM_PRE_REG
);
1886 ret
= snd_soc_update_bits(widget
->codec
, e
->reg
, mask
, val
);
1888 if (widget
->event_flags
& SND_SOC_DAPM_POST_REG
)
1889 ret
= widget
->event(widget
,
1890 kcontrol
, SND_SOC_DAPM_POST_REG
);
1893 mutex_unlock(&widget
->codec
->mutex
);
1896 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double
);
1899 * snd_soc_dapm_info_pin_switch - Info for a pin switch
1901 * @kcontrol: mixer control
1902 * @uinfo: control element information
1904 * Callback to provide information about a pin switch control.
1906 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol
*kcontrol
,
1907 struct snd_ctl_elem_info
*uinfo
)
1909 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_BOOLEAN
;
1911 uinfo
->value
.integer
.min
= 0;
1912 uinfo
->value
.integer
.max
= 1;
1916 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch
);
1919 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
1921 * @kcontrol: mixer control
1924 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol
*kcontrol
,
1925 struct snd_ctl_elem_value
*ucontrol
)
1927 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1928 const char *pin
= (const char *)kcontrol
->private_value
;
1930 mutex_lock(&codec
->mutex
);
1932 ucontrol
->value
.integer
.value
[0] =
1933 snd_soc_dapm_get_pin_status(&codec
->dapm
, pin
);
1935 mutex_unlock(&codec
->mutex
);
1939 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch
);
1942 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
1944 * @kcontrol: mixer control
1947 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol
*kcontrol
,
1948 struct snd_ctl_elem_value
*ucontrol
)
1950 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1951 const char *pin
= (const char *)kcontrol
->private_value
;
1953 mutex_lock(&codec
->mutex
);
1955 if (ucontrol
->value
.integer
.value
[0])
1956 snd_soc_dapm_enable_pin(&codec
->dapm
, pin
);
1958 snd_soc_dapm_disable_pin(&codec
->dapm
, pin
);
1960 snd_soc_dapm_sync(&codec
->dapm
);
1962 mutex_unlock(&codec
->mutex
);
1966 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch
);
1969 * snd_soc_dapm_new_control - create new dapm control
1970 * @dapm: DAPM context
1971 * @widget: widget template
1973 * Creates a new dapm control based upon the template.
1975 * Returns 0 for success else error.
1977 int snd_soc_dapm_new_control(struct snd_soc_dapm_context
*dapm
,
1978 const struct snd_soc_dapm_widget
*widget
)
1980 struct snd_soc_dapm_widget
*w
;
1982 if ((w
= dapm_cnew_widget(widget
)) == NULL
)
1986 w
->codec
= dapm
->codec
;
1987 INIT_LIST_HEAD(&w
->sources
);
1988 INIT_LIST_HEAD(&w
->sinks
);
1989 INIT_LIST_HEAD(&w
->list
);
1990 list_add(&w
->list
, &dapm
->widgets
);
1992 /* machine layer set ups unconnected pins and insertions */
1996 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control
);
1999 * snd_soc_dapm_new_controls - create new dapm controls
2000 * @dapm: DAPM context
2001 * @widget: widget array
2002 * @num: number of widgets
2004 * Creates new DAPM controls based upon the templates.
2006 * Returns 0 for success else error.
2008 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context
*dapm
,
2009 const struct snd_soc_dapm_widget
*widget
,
2014 for (i
= 0; i
< num
; i
++) {
2015 ret
= snd_soc_dapm_new_control(dapm
, widget
);
2018 "ASoC: Failed to create DAPM control %s: %d\n",
2026 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls
);
2028 static void soc_dapm_stream_event(struct snd_soc_dapm_context
*dapm
,
2029 const char *stream
, int event
)
2031 struct snd_soc_dapm_widget
*w
;
2033 list_for_each_entry(w
, &dapm
->widgets
, list
)
2037 dev_dbg(w
->dapm
->dev
, "widget %s\n %s stream %s event %d\n",
2038 w
->name
, w
->sname
, stream
, event
);
2039 if (strstr(w
->sname
, stream
)) {
2041 case SND_SOC_DAPM_STREAM_START
:
2044 case SND_SOC_DAPM_STREAM_STOP
:
2047 case SND_SOC_DAPM_STREAM_SUSPEND
:
2048 case SND_SOC_DAPM_STREAM_RESUME
:
2049 case SND_SOC_DAPM_STREAM_PAUSE_PUSH
:
2050 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE
:
2056 dapm_power_widgets(dapm
, event
);
2060 * snd_soc_dapm_stream_event - send a stream event to the dapm core
2061 * @rtd: PCM runtime data
2062 * @stream: stream name
2063 * @event: stream event
2065 * Sends a stream event to the dapm core. The core then makes any
2066 * necessary widget power changes.
2068 * Returns 0 for success else error.
2070 int snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime
*rtd
,
2071 const char *stream
, int event
)
2073 struct snd_soc_codec
*codec
= rtd
->codec
;
2078 mutex_lock(&codec
->mutex
);
2079 soc_dapm_stream_event(&codec
->dapm
, stream
, event
);
2080 mutex_unlock(&codec
->mutex
);
2083 EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event
);
2086 * snd_soc_dapm_enable_pin - enable pin.
2087 * @dapm: DAPM context
2090 * Enables input/output pin and its parents or children widgets iff there is
2091 * a valid audio route and active audio stream.
2092 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2093 * do any widget power switching.
2095 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context
*dapm
, const char *pin
)
2097 return snd_soc_dapm_set_pin(dapm
, pin
, 1);
2099 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin
);
2102 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
2103 * @dapm: DAPM context
2106 * Enables input/output pin regardless of any other state. This is
2107 * intended for use with microphone bias supplies used in microphone
2110 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2111 * do any widget power switching.
2113 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context
*dapm
,
2116 struct snd_soc_dapm_widget
*w
;
2118 list_for_each_entry(w
, &dapm
->widgets
, list
) {
2119 if (!strcmp(w
->name
, pin
)) {
2120 dev_dbg(w
->dapm
->dev
,
2121 "dapm: force enable pin %s\n", pin
);
2128 dev_err(dapm
->dev
, "dapm: unknown pin %s\n", pin
);
2131 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin
);
2134 * snd_soc_dapm_disable_pin - disable pin.
2135 * @dapm: DAPM context
2138 * Disables input/output pin and its parents or children widgets.
2139 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2140 * do any widget power switching.
2142 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context
*dapm
,
2145 return snd_soc_dapm_set_pin(dapm
, pin
, 0);
2147 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin
);
2150 * snd_soc_dapm_nc_pin - permanently disable pin.
2151 * @dapm: DAPM context
2154 * Marks the specified pin as being not connected, disabling it along
2155 * any parent or child widgets. At present this is identical to
2156 * snd_soc_dapm_disable_pin() but in future it will be extended to do
2157 * additional things such as disabling controls which only affect
2158 * paths through the pin.
2160 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2161 * do any widget power switching.
2163 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context
*dapm
, const char *pin
)
2165 return snd_soc_dapm_set_pin(dapm
, pin
, 0);
2167 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin
);
2170 * snd_soc_dapm_get_pin_status - get audio pin status
2171 * @dapm: DAPM context
2172 * @pin: audio signal pin endpoint (or start point)
2174 * Get audio pin status - connected or disconnected.
2176 * Returns 1 for connected otherwise 0.
2178 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context
*dapm
,
2181 struct snd_soc_dapm_widget
*w
;
2183 list_for_each_entry(w
, &dapm
->widgets
, list
) {
2184 if (!strcmp(w
->name
, pin
))
2185 return w
->connected
;
2190 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status
);
2193 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
2194 * @dapm: DAPM context
2195 * @pin: audio signal pin endpoint (or start point)
2197 * Mark the given endpoint or pin as ignoring suspend. When the
2198 * system is disabled a path between two endpoints flagged as ignoring
2199 * suspend will not be disabled. The path must already be enabled via
2200 * normal means at suspend time, it will not be turned on if it was not
2203 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context
*dapm
,
2206 struct snd_soc_dapm_widget
*w
;
2208 list_for_each_entry(w
, &dapm
->widgets
, list
) {
2209 if (!strcmp(w
->name
, pin
)) {
2210 w
->ignore_suspend
= 1;
2215 dev_err(dapm
->dev
, "dapm: unknown pin %s\n", pin
);
2218 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend
);
2221 * snd_soc_dapm_free - free dapm resources
2224 * Free all dapm widgets and resources.
2226 void snd_soc_dapm_free(struct snd_soc_dapm_context
*dapm
)
2228 snd_soc_dapm_sys_remove(dapm
->dev
);
2229 dapm_free_widgets(dapm
);
2231 EXPORT_SYMBOL_GPL(snd_soc_dapm_free
);
2233 static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context
*dapm
)
2235 struct snd_soc_dapm_widget
*w
;
2236 LIST_HEAD(down_list
);
2239 list_for_each_entry(w
, &dapm
->widgets
, list
) {
2241 dapm_seq_insert(w
, &down_list
, dapm_down_seq
);
2247 /* If there were no widgets to power down we're already in
2251 snd_soc_dapm_set_bias_level(NULL
, dapm
, SND_SOC_BIAS_PREPARE
);
2252 dapm_seq_run(dapm
, &down_list
, 0, dapm_down_seq
);
2253 snd_soc_dapm_set_bias_level(NULL
, dapm
, SND_SOC_BIAS_STANDBY
);
2258 * snd_soc_dapm_shutdown - callback for system shutdown
2260 void snd_soc_dapm_shutdown(struct snd_soc_card
*card
)
2262 struct snd_soc_codec
*codec
;
2264 list_for_each_entry(codec
, &card
->codec_dev_list
, list
) {
2265 soc_dapm_shutdown_codec(&codec
->dapm
);
2266 snd_soc_dapm_set_bias_level(card
, &codec
->dapm
, SND_SOC_BIAS_OFF
);
2270 /* Module information */
2271 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2272 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
2273 MODULE_LICENSE("GPL");