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Merge tag 'drm/panel/for-3.15-rc1' of git://anongit.freedesktop.org/tegra/linux into...
[deliverable/linux.git] / sound / soc / soc-dapm.c
1 /*
2 * soc-dapm.c -- ALSA SoC Dynamic Audio Power Management
3 *
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
6 *
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.
11 *
12 * Features:
13 * o Changes power status of internal codec blocks depending on the
14 * dynamic configuration of codec internal audio paths and active
15 * DACs/ADCs.
16 * o Platform power domain - can support external components i.e. amps and
17 * mic/headphone insertion events.
18 * o Automatic Mic Bias support
19 * o Jack insertion power event initiation - e.g. hp insertion will enable
20 * sinks, dacs, etc
21 * o Delayed power down of audio subsystem to reduce pops between a quick
22 * device reopen.
23 *
24 */
25
26 #include <linux/module.h>
27 #include <linux/moduleparam.h>
28 #include <linux/init.h>
29 #include <linux/async.h>
30 #include <linux/delay.h>
31 #include <linux/pm.h>
32 #include <linux/bitops.h>
33 #include <linux/platform_device.h>
34 #include <linux/jiffies.h>
35 #include <linux/debugfs.h>
36 #include <linux/pm_runtime.h>
37 #include <linux/regulator/consumer.h>
38 #include <linux/clk.h>
39 #include <linux/slab.h>
40 #include <sound/core.h>
41 #include <sound/pcm.h>
42 #include <sound/pcm_params.h>
43 #include <sound/soc.h>
44 #include <sound/initval.h>
45
46 #include <trace/events/asoc.h>
47
48 #define DAPM_UPDATE_STAT(widget, val) widget->dapm->card->dapm_stats.val++;
49
50 static int snd_soc_dapm_add_path(struct snd_soc_dapm_context *dapm,
51 struct snd_soc_dapm_widget *wsource, struct snd_soc_dapm_widget *wsink,
52 const char *control,
53 int (*connected)(struct snd_soc_dapm_widget *source,
54 struct snd_soc_dapm_widget *sink));
55 static struct snd_soc_dapm_widget *
56 snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
57 const struct snd_soc_dapm_widget *widget);
58
59 /* dapm power sequences - make this per codec in the future */
60 static int dapm_up_seq[] = {
61 [snd_soc_dapm_pre] = 0,
62 [snd_soc_dapm_regulator_supply] = 1,
63 [snd_soc_dapm_clock_supply] = 1,
64 [snd_soc_dapm_supply] = 2,
65 [snd_soc_dapm_micbias] = 3,
66 [snd_soc_dapm_dai_link] = 2,
67 [snd_soc_dapm_dai_in] = 4,
68 [snd_soc_dapm_dai_out] = 4,
69 [snd_soc_dapm_aif_in] = 4,
70 [snd_soc_dapm_aif_out] = 4,
71 [snd_soc_dapm_mic] = 5,
72 [snd_soc_dapm_mux] = 6,
73 [snd_soc_dapm_virt_mux] = 6,
74 [snd_soc_dapm_value_mux] = 6,
75 [snd_soc_dapm_dac] = 7,
76 [snd_soc_dapm_switch] = 8,
77 [snd_soc_dapm_mixer] = 8,
78 [snd_soc_dapm_mixer_named_ctl] = 8,
79 [snd_soc_dapm_pga] = 9,
80 [snd_soc_dapm_adc] = 10,
81 [snd_soc_dapm_out_drv] = 11,
82 [snd_soc_dapm_hp] = 11,
83 [snd_soc_dapm_spk] = 11,
84 [snd_soc_dapm_line] = 11,
85 [snd_soc_dapm_kcontrol] = 12,
86 [snd_soc_dapm_post] = 13,
87 };
88
89 static int dapm_down_seq[] = {
90 [snd_soc_dapm_pre] = 0,
91 [snd_soc_dapm_kcontrol] = 1,
92 [snd_soc_dapm_adc] = 2,
93 [snd_soc_dapm_hp] = 3,
94 [snd_soc_dapm_spk] = 3,
95 [snd_soc_dapm_line] = 3,
96 [snd_soc_dapm_out_drv] = 3,
97 [snd_soc_dapm_pga] = 4,
98 [snd_soc_dapm_switch] = 5,
99 [snd_soc_dapm_mixer_named_ctl] = 5,
100 [snd_soc_dapm_mixer] = 5,
101 [snd_soc_dapm_dac] = 6,
102 [snd_soc_dapm_mic] = 7,
103 [snd_soc_dapm_micbias] = 8,
104 [snd_soc_dapm_mux] = 9,
105 [snd_soc_dapm_virt_mux] = 9,
106 [snd_soc_dapm_value_mux] = 9,
107 [snd_soc_dapm_aif_in] = 10,
108 [snd_soc_dapm_aif_out] = 10,
109 [snd_soc_dapm_dai_in] = 10,
110 [snd_soc_dapm_dai_out] = 10,
111 [snd_soc_dapm_dai_link] = 11,
112 [snd_soc_dapm_supply] = 12,
113 [snd_soc_dapm_clock_supply] = 13,
114 [snd_soc_dapm_regulator_supply] = 13,
115 [snd_soc_dapm_post] = 14,
116 };
117
118 static void pop_wait(u32 pop_time)
119 {
120 if (pop_time)
121 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
122 }
123
124 static void pop_dbg(struct device *dev, u32 pop_time, const char *fmt, ...)
125 {
126 va_list args;
127 char *buf;
128
129 if (!pop_time)
130 return;
131
132 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
133 if (buf == NULL)
134 return;
135
136 va_start(args, fmt);
137 vsnprintf(buf, PAGE_SIZE, fmt, args);
138 dev_info(dev, "%s", buf);
139 va_end(args);
140
141 kfree(buf);
142 }
143
144 static bool dapm_dirty_widget(struct snd_soc_dapm_widget *w)
145 {
146 return !list_empty(&w->dirty);
147 }
148
149 void dapm_mark_dirty(struct snd_soc_dapm_widget *w, const char *reason)
150 {
151 if (!dapm_dirty_widget(w)) {
152 dev_vdbg(w->dapm->dev, "Marking %s dirty due to %s\n",
153 w->name, reason);
154 list_add_tail(&w->dirty, &w->dapm->card->dapm_dirty);
155 }
156 }
157 EXPORT_SYMBOL_GPL(dapm_mark_dirty);
158
159 void dapm_mark_io_dirty(struct snd_soc_dapm_context *dapm)
160 {
161 struct snd_soc_card *card = dapm->card;
162 struct snd_soc_dapm_widget *w;
163
164 mutex_lock(&card->dapm_mutex);
165
166 list_for_each_entry(w, &card->widgets, list) {
167 switch (w->id) {
168 case snd_soc_dapm_input:
169 case snd_soc_dapm_output:
170 dapm_mark_dirty(w, "Rechecking inputs and outputs");
171 break;
172 default:
173 break;
174 }
175 }
176
177 mutex_unlock(&card->dapm_mutex);
178 }
179 EXPORT_SYMBOL_GPL(dapm_mark_io_dirty);
180
181 /* create a new dapm widget */
182 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
183 const struct snd_soc_dapm_widget *_widget)
184 {
185 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
186 }
187
188 struct dapm_kcontrol_data {
189 unsigned int value;
190 struct snd_soc_dapm_widget *widget;
191 struct list_head paths;
192 struct snd_soc_dapm_widget_list *wlist;
193 };
194
195 static int dapm_kcontrol_data_alloc(struct snd_soc_dapm_widget *widget,
196 struct snd_kcontrol *kcontrol)
197 {
198 struct dapm_kcontrol_data *data;
199 struct soc_mixer_control *mc;
200
201 data = kzalloc(sizeof(*data), GFP_KERNEL);
202 if (!data) {
203 dev_err(widget->dapm->dev,
204 "ASoC: can't allocate kcontrol data for %s\n",
205 widget->name);
206 return -ENOMEM;
207 }
208
209 INIT_LIST_HEAD(&data->paths);
210
211 switch (widget->id) {
212 case snd_soc_dapm_switch:
213 case snd_soc_dapm_mixer:
214 case snd_soc_dapm_mixer_named_ctl:
215 mc = (struct soc_mixer_control *)kcontrol->private_value;
216
217 if (mc->autodisable) {
218 struct snd_soc_dapm_widget template;
219
220 memset(&template, 0, sizeof(template));
221 template.reg = mc->reg;
222 template.mask = (1 << fls(mc->max)) - 1;
223 template.shift = mc->shift;
224 if (mc->invert)
225 template.off_val = mc->max;
226 else
227 template.off_val = 0;
228 template.on_val = template.off_val;
229 template.id = snd_soc_dapm_kcontrol;
230 template.name = kcontrol->id.name;
231
232 data->value = template.on_val;
233
234 data->widget = snd_soc_dapm_new_control(widget->dapm,
235 &template);
236 if (!data->widget) {
237 kfree(data);
238 return -ENOMEM;
239 }
240 }
241 break;
242 default:
243 break;
244 }
245
246 kcontrol->private_data = data;
247
248 return 0;
249 }
250
251 static void dapm_kcontrol_free(struct snd_kcontrol *kctl)
252 {
253 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kctl);
254 kfree(data->widget);
255 kfree(data->wlist);
256 kfree(data);
257 }
258
259 static struct snd_soc_dapm_widget_list *dapm_kcontrol_get_wlist(
260 const struct snd_kcontrol *kcontrol)
261 {
262 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
263
264 return data->wlist;
265 }
266
267 static int dapm_kcontrol_add_widget(struct snd_kcontrol *kcontrol,
268 struct snd_soc_dapm_widget *widget)
269 {
270 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
271 struct snd_soc_dapm_widget_list *new_wlist;
272 unsigned int n;
273
274 if (data->wlist)
275 n = data->wlist->num_widgets + 1;
276 else
277 n = 1;
278
279 new_wlist = krealloc(data->wlist,
280 sizeof(*new_wlist) + sizeof(widget) * n, GFP_KERNEL);
281 if (!new_wlist)
282 return -ENOMEM;
283
284 new_wlist->widgets[n - 1] = widget;
285 new_wlist->num_widgets = n;
286
287 data->wlist = new_wlist;
288
289 return 0;
290 }
291
292 static void dapm_kcontrol_add_path(const struct snd_kcontrol *kcontrol,
293 struct snd_soc_dapm_path *path)
294 {
295 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
296
297 list_add_tail(&path->list_kcontrol, &data->paths);
298
299 if (data->widget) {
300 snd_soc_dapm_add_path(data->widget->dapm, data->widget,
301 path->source, NULL, NULL);
302 }
303 }
304
305 static bool dapm_kcontrol_is_powered(const struct snd_kcontrol *kcontrol)
306 {
307 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
308
309 if (!data->widget)
310 return true;
311
312 return data->widget->power;
313 }
314
315 static struct list_head *dapm_kcontrol_get_path_list(
316 const struct snd_kcontrol *kcontrol)
317 {
318 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
319
320 return &data->paths;
321 }
322
323 #define dapm_kcontrol_for_each_path(path, kcontrol) \
324 list_for_each_entry(path, dapm_kcontrol_get_path_list(kcontrol), \
325 list_kcontrol)
326
327 static unsigned int dapm_kcontrol_get_value(const struct snd_kcontrol *kcontrol)
328 {
329 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
330
331 return data->value;
332 }
333
334 static bool dapm_kcontrol_set_value(const struct snd_kcontrol *kcontrol,
335 unsigned int value)
336 {
337 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
338
339 if (data->value == value)
340 return false;
341
342 if (data->widget)
343 data->widget->on_val = value;
344
345 data->value = value;
346
347 return true;
348 }
349
350 /**
351 * snd_soc_dapm_kcontrol_codec() - Returns the codec associated to a kcontrol
352 * @kcontrol: The kcontrol
353 */
354 struct snd_soc_codec *snd_soc_dapm_kcontrol_codec(struct snd_kcontrol *kcontrol)
355 {
356 return dapm_kcontrol_get_wlist(kcontrol)->widgets[0]->codec;
357 }
358 EXPORT_SYMBOL_GPL(snd_soc_dapm_kcontrol_codec);
359
360 static void dapm_reset(struct snd_soc_card *card)
361 {
362 struct snd_soc_dapm_widget *w;
363
364 memset(&card->dapm_stats, 0, sizeof(card->dapm_stats));
365
366 list_for_each_entry(w, &card->widgets, list) {
367 w->new_power = w->power;
368 w->power_checked = false;
369 w->inputs = -1;
370 w->outputs = -1;
371 }
372 }
373
374 static int soc_widget_read(struct snd_soc_dapm_widget *w, int reg,
375 unsigned int *value)
376 {
377 if (w->codec) {
378 *value = snd_soc_read(w->codec, reg);
379 return 0;
380 } else if (w->platform) {
381 *value = snd_soc_platform_read(w->platform, reg);
382 return 0;
383 }
384
385 dev_err(w->dapm->dev, "ASoC: no valid widget read method\n");
386 return -1;
387 }
388
389 static int soc_widget_write(struct snd_soc_dapm_widget *w, int reg, int val)
390 {
391 if (w->codec)
392 return snd_soc_write(w->codec, reg, val);
393 else if (w->platform)
394 return snd_soc_platform_write(w->platform, reg, val);
395
396 dev_err(w->dapm->dev, "ASoC: no valid widget write method\n");
397 return -1;
398 }
399
400 static inline void soc_widget_lock(struct snd_soc_dapm_widget *w)
401 {
402 if (w->codec && !w->codec->using_regmap)
403 mutex_lock(&w->codec->mutex);
404 else if (w->platform)
405 mutex_lock(&w->platform->mutex);
406 }
407
408 static inline void soc_widget_unlock(struct snd_soc_dapm_widget *w)
409 {
410 if (w->codec && !w->codec->using_regmap)
411 mutex_unlock(&w->codec->mutex);
412 else if (w->platform)
413 mutex_unlock(&w->platform->mutex);
414 }
415
416 static void soc_dapm_async_complete(struct snd_soc_dapm_context *dapm)
417 {
418 if (dapm->codec && dapm->codec->using_regmap)
419 regmap_async_complete(dapm->codec->control_data);
420 }
421
422 static int soc_widget_update_bits_locked(struct snd_soc_dapm_widget *w,
423 unsigned short reg, unsigned int mask, unsigned int value)
424 {
425 bool change;
426 unsigned int old, new;
427 int ret;
428
429 if (w->codec && w->codec->using_regmap) {
430 ret = regmap_update_bits_check_async(w->codec->control_data,
431 reg, mask, value,
432 &change);
433 if (ret != 0)
434 return ret;
435 } else {
436 soc_widget_lock(w);
437 ret = soc_widget_read(w, reg, &old);
438 if (ret < 0) {
439 soc_widget_unlock(w);
440 return ret;
441 }
442
443 new = (old & ~mask) | (value & mask);
444 change = old != new;
445 if (change) {
446 ret = soc_widget_write(w, reg, new);
447 if (ret < 0) {
448 soc_widget_unlock(w);
449 return ret;
450 }
451 }
452 soc_widget_unlock(w);
453 }
454
455 return change;
456 }
457
458 /**
459 * snd_soc_dapm_set_bias_level - set the bias level for the system
460 * @dapm: DAPM context
461 * @level: level to configure
462 *
463 * Configure the bias (power) levels for the SoC audio device.
464 *
465 * Returns 0 for success else error.
466 */
467 static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm,
468 enum snd_soc_bias_level level)
469 {
470 struct snd_soc_card *card = dapm->card;
471 int ret = 0;
472
473 trace_snd_soc_bias_level_start(card, level);
474
475 if (card && card->set_bias_level)
476 ret = card->set_bias_level(card, dapm, level);
477 if (ret != 0)
478 goto out;
479
480 if (dapm->codec) {
481 if (dapm->codec->driver->set_bias_level)
482 ret = dapm->codec->driver->set_bias_level(dapm->codec,
483 level);
484 else
485 dapm->bias_level = level;
486 } else if (!card || dapm != &card->dapm) {
487 dapm->bias_level = level;
488 }
489
490 if (ret != 0)
491 goto out;
492
493 if (card && card->set_bias_level_post)
494 ret = card->set_bias_level_post(card, dapm, level);
495 out:
496 trace_snd_soc_bias_level_done(card, level);
497
498 return ret;
499 }
500
501 /* set up initial codec paths */
502 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
503 struct snd_soc_dapm_path *p, int i)
504 {
505 switch (w->id) {
506 case snd_soc_dapm_switch:
507 case snd_soc_dapm_mixer:
508 case snd_soc_dapm_mixer_named_ctl: {
509 int val;
510 struct soc_mixer_control *mc = (struct soc_mixer_control *)
511 w->kcontrol_news[i].private_value;
512 int reg = mc->reg;
513 unsigned int shift = mc->shift;
514 int max = mc->max;
515 unsigned int mask = (1 << fls(max)) - 1;
516 unsigned int invert = mc->invert;
517
518 if (reg != SND_SOC_NOPM) {
519 soc_widget_read(w, reg, &val);
520 val = (val >> shift) & mask;
521 if (invert)
522 val = max - val;
523 p->connect = !!val;
524 } else {
525 p->connect = 0;
526 }
527
528 }
529 break;
530 case snd_soc_dapm_mux: {
531 struct soc_enum *e = (struct soc_enum *)
532 w->kcontrol_news[i].private_value;
533 int val, item;
534
535 soc_widget_read(w, e->reg, &val);
536 item = (val >> e->shift_l) & e->mask;
537
538 if (item < e->max && !strcmp(p->name, e->texts[item]))
539 p->connect = 1;
540 else
541 p->connect = 0;
542 }
543 break;
544 case snd_soc_dapm_virt_mux: {
545 struct soc_enum *e = (struct soc_enum *)
546 w->kcontrol_news[i].private_value;
547
548 p->connect = 0;
549 /* since a virtual mux has no backing registers to
550 * decide which path to connect, it will try to match
551 * with the first enumeration. This is to ensure
552 * that the default mux choice (the first) will be
553 * correctly powered up during initialization.
554 */
555 if (!strcmp(p->name, e->texts[0]))
556 p->connect = 1;
557 }
558 break;
559 case snd_soc_dapm_value_mux: {
560 struct soc_enum *e = (struct soc_enum *)
561 w->kcontrol_news[i].private_value;
562 int val, item;
563
564 soc_widget_read(w, e->reg, &val);
565 val = (val >> e->shift_l) & e->mask;
566 for (item = 0; item < e->max; item++) {
567 if (val == e->values[item])
568 break;
569 }
570
571 if (item < e->max && !strcmp(p->name, e->texts[item]))
572 p->connect = 1;
573 else
574 p->connect = 0;
575 }
576 break;
577 /* does not affect routing - always connected */
578 case snd_soc_dapm_pga:
579 case snd_soc_dapm_out_drv:
580 case snd_soc_dapm_output:
581 case snd_soc_dapm_adc:
582 case snd_soc_dapm_input:
583 case snd_soc_dapm_siggen:
584 case snd_soc_dapm_dac:
585 case snd_soc_dapm_micbias:
586 case snd_soc_dapm_vmid:
587 case snd_soc_dapm_supply:
588 case snd_soc_dapm_regulator_supply:
589 case snd_soc_dapm_clock_supply:
590 case snd_soc_dapm_aif_in:
591 case snd_soc_dapm_aif_out:
592 case snd_soc_dapm_dai_in:
593 case snd_soc_dapm_dai_out:
594 case snd_soc_dapm_hp:
595 case snd_soc_dapm_mic:
596 case snd_soc_dapm_spk:
597 case snd_soc_dapm_line:
598 case snd_soc_dapm_dai_link:
599 case snd_soc_dapm_kcontrol:
600 p->connect = 1;
601 break;
602 /* does affect routing - dynamically connected */
603 case snd_soc_dapm_pre:
604 case snd_soc_dapm_post:
605 p->connect = 0;
606 break;
607 }
608 }
609
610 /* connect mux widget to its interconnecting audio paths */
611 static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
612 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
613 struct snd_soc_dapm_path *path, const char *control_name,
614 const struct snd_kcontrol_new *kcontrol)
615 {
616 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
617 int i;
618
619 for (i = 0; i < e->max; i++) {
620 if (!(strcmp(control_name, e->texts[i]))) {
621 list_add(&path->list, &dapm->card->paths);
622 list_add(&path->list_sink, &dest->sources);
623 list_add(&path->list_source, &src->sinks);
624 path->name = (char*)e->texts[i];
625 dapm_set_path_status(dest, path, 0);
626 return 0;
627 }
628 }
629
630 return -ENODEV;
631 }
632
633 /* connect mixer widget to its interconnecting audio paths */
634 static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
635 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
636 struct snd_soc_dapm_path *path, const char *control_name)
637 {
638 int i;
639
640 /* search for mixer kcontrol */
641 for (i = 0; i < dest->num_kcontrols; i++) {
642 if (!strcmp(control_name, dest->kcontrol_news[i].name)) {
643 list_add(&path->list, &dapm->card->paths);
644 list_add(&path->list_sink, &dest->sources);
645 list_add(&path->list_source, &src->sinks);
646 path->name = dest->kcontrol_news[i].name;
647 dapm_set_path_status(dest, path, i);
648 return 0;
649 }
650 }
651 return -ENODEV;
652 }
653
654 static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm,
655 struct snd_soc_dapm_widget *kcontrolw,
656 const struct snd_kcontrol_new *kcontrol_new,
657 struct snd_kcontrol **kcontrol)
658 {
659 struct snd_soc_dapm_widget *w;
660 int i;
661
662 *kcontrol = NULL;
663
664 list_for_each_entry(w, &dapm->card->widgets, list) {
665 if (w == kcontrolw || w->dapm != kcontrolw->dapm)
666 continue;
667 for (i = 0; i < w->num_kcontrols; i++) {
668 if (&w->kcontrol_news[i] == kcontrol_new) {
669 if (w->kcontrols)
670 *kcontrol = w->kcontrols[i];
671 return 1;
672 }
673 }
674 }
675
676 return 0;
677 }
678
679 /*
680 * Determine if a kcontrol is shared. If it is, look it up. If it isn't,
681 * create it. Either way, add the widget into the control's widget list
682 */
683 static int dapm_create_or_share_mixmux_kcontrol(struct snd_soc_dapm_widget *w,
684 int kci)
685 {
686 struct snd_soc_dapm_context *dapm = w->dapm;
687 struct snd_card *card = dapm->card->snd_card;
688 const char *prefix;
689 size_t prefix_len;
690 int shared;
691 struct snd_kcontrol *kcontrol;
692 bool wname_in_long_name, kcname_in_long_name;
693 char *long_name;
694 const char *name;
695 int ret;
696
697 if (dapm->codec)
698 prefix = dapm->codec->name_prefix;
699 else
700 prefix = NULL;
701
702 if (prefix)
703 prefix_len = strlen(prefix) + 1;
704 else
705 prefix_len = 0;
706
707 shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[kci],
708 &kcontrol);
709
710 if (!kcontrol) {
711 if (shared) {
712 wname_in_long_name = false;
713 kcname_in_long_name = true;
714 } else {
715 switch (w->id) {
716 case snd_soc_dapm_switch:
717 case snd_soc_dapm_mixer:
718 wname_in_long_name = true;
719 kcname_in_long_name = true;
720 break;
721 case snd_soc_dapm_mixer_named_ctl:
722 wname_in_long_name = false;
723 kcname_in_long_name = true;
724 break;
725 case snd_soc_dapm_mux:
726 case snd_soc_dapm_virt_mux:
727 case snd_soc_dapm_value_mux:
728 wname_in_long_name = true;
729 kcname_in_long_name = false;
730 break;
731 default:
732 return -EINVAL;
733 }
734 }
735
736 if (wname_in_long_name && kcname_in_long_name) {
737 /*
738 * The control will get a prefix from the control
739 * creation process but we're also using the same
740 * prefix for widgets so cut the prefix off the
741 * front of the widget name.
742 */
743 long_name = kasprintf(GFP_KERNEL, "%s %s",
744 w->name + prefix_len,
745 w->kcontrol_news[kci].name);
746 if (long_name == NULL)
747 return -ENOMEM;
748
749 name = long_name;
750 } else if (wname_in_long_name) {
751 long_name = NULL;
752 name = w->name + prefix_len;
753 } else {
754 long_name = NULL;
755 name = w->kcontrol_news[kci].name;
756 }
757
758 kcontrol = snd_soc_cnew(&w->kcontrol_news[kci], NULL, name,
759 prefix);
760 kfree(long_name);
761 if (!kcontrol)
762 return -ENOMEM;
763 kcontrol->private_free = dapm_kcontrol_free;
764
765 ret = dapm_kcontrol_data_alloc(w, kcontrol);
766 if (ret) {
767 snd_ctl_free_one(kcontrol);
768 return ret;
769 }
770
771 ret = snd_ctl_add(card, kcontrol);
772 if (ret < 0) {
773 dev_err(dapm->dev,
774 "ASoC: failed to add widget %s dapm kcontrol %s: %d\n",
775 w->name, name, ret);
776 return ret;
777 }
778 }
779
780 ret = dapm_kcontrol_add_widget(kcontrol, w);
781 if (ret)
782 return ret;
783
784 w->kcontrols[kci] = kcontrol;
785
786 return 0;
787 }
788
789 /* create new dapm mixer control */
790 static int dapm_new_mixer(struct snd_soc_dapm_widget *w)
791 {
792 int i, ret;
793 struct snd_soc_dapm_path *path;
794
795 /* add kcontrol */
796 for (i = 0; i < w->num_kcontrols; i++) {
797 /* match name */
798 list_for_each_entry(path, &w->sources, list_sink) {
799 /* mixer/mux paths name must match control name */
800 if (path->name != (char *)w->kcontrol_news[i].name)
801 continue;
802
803 if (w->kcontrols[i]) {
804 dapm_kcontrol_add_path(w->kcontrols[i], path);
805 continue;
806 }
807
808 ret = dapm_create_or_share_mixmux_kcontrol(w, i);
809 if (ret < 0)
810 return ret;
811
812 dapm_kcontrol_add_path(w->kcontrols[i], path);
813 }
814 }
815
816 return 0;
817 }
818
819 /* create new dapm mux control */
820 static int dapm_new_mux(struct snd_soc_dapm_widget *w)
821 {
822 struct snd_soc_dapm_context *dapm = w->dapm;
823 struct snd_soc_dapm_path *path;
824 int ret;
825
826 if (w->num_kcontrols != 1) {
827 dev_err(dapm->dev,
828 "ASoC: mux %s has incorrect number of controls\n",
829 w->name);
830 return -EINVAL;
831 }
832
833 if (list_empty(&w->sources)) {
834 dev_err(dapm->dev, "ASoC: mux %s has no paths\n", w->name);
835 return -EINVAL;
836 }
837
838 ret = dapm_create_or_share_mixmux_kcontrol(w, 0);
839 if (ret < 0)
840 return ret;
841
842 list_for_each_entry(path, &w->sources, list_sink)
843 dapm_kcontrol_add_path(w->kcontrols[0], path);
844
845 return 0;
846 }
847
848 /* create new dapm volume control */
849 static int dapm_new_pga(struct snd_soc_dapm_widget *w)
850 {
851 if (w->num_kcontrols)
852 dev_err(w->dapm->dev,
853 "ASoC: PGA controls not supported: '%s'\n", w->name);
854
855 return 0;
856 }
857
858 /* reset 'walked' bit for each dapm path */
859 static void dapm_clear_walk_output(struct snd_soc_dapm_context *dapm,
860 struct list_head *sink)
861 {
862 struct snd_soc_dapm_path *p;
863
864 list_for_each_entry(p, sink, list_source) {
865 if (p->walked) {
866 p->walked = 0;
867 dapm_clear_walk_output(dapm, &p->sink->sinks);
868 }
869 }
870 }
871
872 static void dapm_clear_walk_input(struct snd_soc_dapm_context *dapm,
873 struct list_head *source)
874 {
875 struct snd_soc_dapm_path *p;
876
877 list_for_each_entry(p, source, list_sink) {
878 if (p->walked) {
879 p->walked = 0;
880 dapm_clear_walk_input(dapm, &p->source->sources);
881 }
882 }
883 }
884
885
886 /* We implement power down on suspend by checking the power state of
887 * the ALSA card - when we are suspending the ALSA state for the card
888 * is set to D3.
889 */
890 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
891 {
892 int level = snd_power_get_state(widget->dapm->card->snd_card);
893
894 switch (level) {
895 case SNDRV_CTL_POWER_D3hot:
896 case SNDRV_CTL_POWER_D3cold:
897 if (widget->ignore_suspend)
898 dev_dbg(widget->dapm->dev, "ASoC: %s ignoring suspend\n",
899 widget->name);
900 return widget->ignore_suspend;
901 default:
902 return 1;
903 }
904 }
905
906 /* add widget to list if it's not already in the list */
907 static int dapm_list_add_widget(struct snd_soc_dapm_widget_list **list,
908 struct snd_soc_dapm_widget *w)
909 {
910 struct snd_soc_dapm_widget_list *wlist;
911 int wlistsize, wlistentries, i;
912
913 if (*list == NULL)
914 return -EINVAL;
915
916 wlist = *list;
917
918 /* is this widget already in the list */
919 for (i = 0; i < wlist->num_widgets; i++) {
920 if (wlist->widgets[i] == w)
921 return 0;
922 }
923
924 /* allocate some new space */
925 wlistentries = wlist->num_widgets + 1;
926 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
927 wlistentries * sizeof(struct snd_soc_dapm_widget *);
928 *list = krealloc(wlist, wlistsize, GFP_KERNEL);
929 if (*list == NULL) {
930 dev_err(w->dapm->dev, "ASoC: can't allocate widget list for %s\n",
931 w->name);
932 return -ENOMEM;
933 }
934 wlist = *list;
935
936 /* insert the widget */
937 dev_dbg(w->dapm->dev, "ASoC: added %s in widget list pos %d\n",
938 w->name, wlist->num_widgets);
939
940 wlist->widgets[wlist->num_widgets] = w;
941 wlist->num_widgets++;
942 return 1;
943 }
944
945 /*
946 * Recursively check for a completed path to an active or physically connected
947 * output widget. Returns number of complete paths.
948 */
949 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget,
950 struct snd_soc_dapm_widget_list **list)
951 {
952 struct snd_soc_dapm_path *path;
953 int con = 0;
954
955 if (widget->outputs >= 0)
956 return widget->outputs;
957
958 DAPM_UPDATE_STAT(widget, path_checks);
959
960 switch (widget->id) {
961 case snd_soc_dapm_supply:
962 case snd_soc_dapm_regulator_supply:
963 case snd_soc_dapm_clock_supply:
964 case snd_soc_dapm_kcontrol:
965 return 0;
966 default:
967 break;
968 }
969
970 switch (widget->id) {
971 case snd_soc_dapm_adc:
972 case snd_soc_dapm_aif_out:
973 case snd_soc_dapm_dai_out:
974 if (widget->active) {
975 widget->outputs = snd_soc_dapm_suspend_check(widget);
976 return widget->outputs;
977 }
978 default:
979 break;
980 }
981
982 if (widget->connected) {
983 /* connected pin ? */
984 if (widget->id == snd_soc_dapm_output && !widget->ext) {
985 widget->outputs = snd_soc_dapm_suspend_check(widget);
986 return widget->outputs;
987 }
988
989 /* connected jack or spk ? */
990 if (widget->id == snd_soc_dapm_hp ||
991 widget->id == snd_soc_dapm_spk ||
992 (widget->id == snd_soc_dapm_line &&
993 !list_empty(&widget->sources))) {
994 widget->outputs = snd_soc_dapm_suspend_check(widget);
995 return widget->outputs;
996 }
997 }
998
999 list_for_each_entry(path, &widget->sinks, list_source) {
1000 DAPM_UPDATE_STAT(widget, neighbour_checks);
1001
1002 if (path->weak)
1003 continue;
1004
1005 if (path->walking)
1006 return 1;
1007
1008 if (path->walked)
1009 continue;
1010
1011 trace_snd_soc_dapm_output_path(widget, path);
1012
1013 if (path->sink && path->connect) {
1014 path->walked = 1;
1015 path->walking = 1;
1016
1017 /* do we need to add this widget to the list ? */
1018 if (list) {
1019 int err;
1020 err = dapm_list_add_widget(list, path->sink);
1021 if (err < 0) {
1022 dev_err(widget->dapm->dev,
1023 "ASoC: could not add widget %s\n",
1024 widget->name);
1025 path->walking = 0;
1026 return con;
1027 }
1028 }
1029
1030 con += is_connected_output_ep(path->sink, list);
1031
1032 path->walking = 0;
1033 }
1034 }
1035
1036 widget->outputs = con;
1037
1038 return con;
1039 }
1040
1041 /*
1042 * Recursively check for a completed path to an active or physically connected
1043 * input widget. Returns number of complete paths.
1044 */
1045 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget,
1046 struct snd_soc_dapm_widget_list **list)
1047 {
1048 struct snd_soc_dapm_path *path;
1049 int con = 0;
1050
1051 if (widget->inputs >= 0)
1052 return widget->inputs;
1053
1054 DAPM_UPDATE_STAT(widget, path_checks);
1055
1056 switch (widget->id) {
1057 case snd_soc_dapm_supply:
1058 case snd_soc_dapm_regulator_supply:
1059 case snd_soc_dapm_clock_supply:
1060 case snd_soc_dapm_kcontrol:
1061 return 0;
1062 default:
1063 break;
1064 }
1065
1066 /* active stream ? */
1067 switch (widget->id) {
1068 case snd_soc_dapm_dac:
1069 case snd_soc_dapm_aif_in:
1070 case snd_soc_dapm_dai_in:
1071 if (widget->active) {
1072 widget->inputs = snd_soc_dapm_suspend_check(widget);
1073 return widget->inputs;
1074 }
1075 default:
1076 break;
1077 }
1078
1079 if (widget->connected) {
1080 /* connected pin ? */
1081 if (widget->id == snd_soc_dapm_input && !widget->ext) {
1082 widget->inputs = snd_soc_dapm_suspend_check(widget);
1083 return widget->inputs;
1084 }
1085
1086 /* connected VMID/Bias for lower pops */
1087 if (widget->id == snd_soc_dapm_vmid) {
1088 widget->inputs = snd_soc_dapm_suspend_check(widget);
1089 return widget->inputs;
1090 }
1091
1092 /* connected jack ? */
1093 if (widget->id == snd_soc_dapm_mic ||
1094 (widget->id == snd_soc_dapm_line &&
1095 !list_empty(&widget->sinks))) {
1096 widget->inputs = snd_soc_dapm_suspend_check(widget);
1097 return widget->inputs;
1098 }
1099
1100 /* signal generator */
1101 if (widget->id == snd_soc_dapm_siggen) {
1102 widget->inputs = snd_soc_dapm_suspend_check(widget);
1103 return widget->inputs;
1104 }
1105 }
1106
1107 list_for_each_entry(path, &widget->sources, list_sink) {
1108 DAPM_UPDATE_STAT(widget, neighbour_checks);
1109
1110 if (path->weak)
1111 continue;
1112
1113 if (path->walking)
1114 return 1;
1115
1116 if (path->walked)
1117 continue;
1118
1119 trace_snd_soc_dapm_input_path(widget, path);
1120
1121 if (path->source && path->connect) {
1122 path->walked = 1;
1123 path->walking = 1;
1124
1125 /* do we need to add this widget to the list ? */
1126 if (list) {
1127 int err;
1128 err = dapm_list_add_widget(list, path->source);
1129 if (err < 0) {
1130 dev_err(widget->dapm->dev,
1131 "ASoC: could not add widget %s\n",
1132 widget->name);
1133 path->walking = 0;
1134 return con;
1135 }
1136 }
1137
1138 con += is_connected_input_ep(path->source, list);
1139
1140 path->walking = 0;
1141 }
1142 }
1143
1144 widget->inputs = con;
1145
1146 return con;
1147 }
1148
1149 /**
1150 * snd_soc_dapm_get_connected_widgets - query audio path and it's widgets.
1151 * @dai: the soc DAI.
1152 * @stream: stream direction.
1153 * @list: list of active widgets for this stream.
1154 *
1155 * Queries DAPM graph as to whether an valid audio stream path exists for
1156 * the initial stream specified by name. This takes into account
1157 * current mixer and mux kcontrol settings. Creates list of valid widgets.
1158 *
1159 * Returns the number of valid paths or negative error.
1160 */
1161 int snd_soc_dapm_dai_get_connected_widgets(struct snd_soc_dai *dai, int stream,
1162 struct snd_soc_dapm_widget_list **list)
1163 {
1164 struct snd_soc_card *card = dai->card;
1165 int paths;
1166
1167 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
1168 dapm_reset(card);
1169
1170 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1171 paths = is_connected_output_ep(dai->playback_widget, list);
1172 dapm_clear_walk_output(&card->dapm,
1173 &dai->playback_widget->sinks);
1174 } else {
1175 paths = is_connected_input_ep(dai->capture_widget, list);
1176 dapm_clear_walk_input(&card->dapm,
1177 &dai->capture_widget->sources);
1178 }
1179
1180 trace_snd_soc_dapm_connected(paths, stream);
1181 mutex_unlock(&card->dapm_mutex);
1182
1183 return paths;
1184 }
1185
1186 /*
1187 * Handler for generic register modifier widget.
1188 */
1189 int dapm_reg_event(struct snd_soc_dapm_widget *w,
1190 struct snd_kcontrol *kcontrol, int event)
1191 {
1192 unsigned int val;
1193
1194 if (SND_SOC_DAPM_EVENT_ON(event))
1195 val = w->on_val;
1196 else
1197 val = w->off_val;
1198
1199 soc_widget_update_bits_locked(w, -(w->reg + 1),
1200 w->mask << w->shift, val << w->shift);
1201
1202 return 0;
1203 }
1204 EXPORT_SYMBOL_GPL(dapm_reg_event);
1205
1206 /*
1207 * Handler for regulator supply widget.
1208 */
1209 int dapm_regulator_event(struct snd_soc_dapm_widget *w,
1210 struct snd_kcontrol *kcontrol, int event)
1211 {
1212 int ret;
1213
1214 soc_dapm_async_complete(w->dapm);
1215
1216 if (SND_SOC_DAPM_EVENT_ON(event)) {
1217 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
1218 ret = regulator_allow_bypass(w->regulator, false);
1219 if (ret != 0)
1220 dev_warn(w->dapm->dev,
1221 "ASoC: Failed to unbypass %s: %d\n",
1222 w->name, ret);
1223 }
1224
1225 return regulator_enable(w->regulator);
1226 } else {
1227 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
1228 ret = regulator_allow_bypass(w->regulator, true);
1229 if (ret != 0)
1230 dev_warn(w->dapm->dev,
1231 "ASoC: Failed to bypass %s: %d\n",
1232 w->name, ret);
1233 }
1234
1235 return regulator_disable_deferred(w->regulator, w->shift);
1236 }
1237 }
1238 EXPORT_SYMBOL_GPL(dapm_regulator_event);
1239
1240 /*
1241 * Handler for clock supply widget.
1242 */
1243 int dapm_clock_event(struct snd_soc_dapm_widget *w,
1244 struct snd_kcontrol *kcontrol, int event)
1245 {
1246 if (!w->clk)
1247 return -EIO;
1248
1249 soc_dapm_async_complete(w->dapm);
1250
1251 #ifdef CONFIG_HAVE_CLK
1252 if (SND_SOC_DAPM_EVENT_ON(event)) {
1253 return clk_prepare_enable(w->clk);
1254 } else {
1255 clk_disable_unprepare(w->clk);
1256 return 0;
1257 }
1258 #endif
1259 return 0;
1260 }
1261 EXPORT_SYMBOL_GPL(dapm_clock_event);
1262
1263 static int dapm_widget_power_check(struct snd_soc_dapm_widget *w)
1264 {
1265 if (w->power_checked)
1266 return w->new_power;
1267
1268 if (w->force)
1269 w->new_power = 1;
1270 else
1271 w->new_power = w->power_check(w);
1272
1273 w->power_checked = true;
1274
1275 return w->new_power;
1276 }
1277
1278 /* Generic check to see if a widget should be powered.
1279 */
1280 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
1281 {
1282 int in, out;
1283
1284 DAPM_UPDATE_STAT(w, power_checks);
1285
1286 in = is_connected_input_ep(w, NULL);
1287 dapm_clear_walk_input(w->dapm, &w->sources);
1288 out = is_connected_output_ep(w, NULL);
1289 dapm_clear_walk_output(w->dapm, &w->sinks);
1290 return out != 0 && in != 0;
1291 }
1292
1293 /* Check to see if an ADC has power */
1294 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
1295 {
1296 int in;
1297
1298 DAPM_UPDATE_STAT(w, power_checks);
1299
1300 if (w->active) {
1301 in = is_connected_input_ep(w, NULL);
1302 dapm_clear_walk_input(w->dapm, &w->sources);
1303 return in != 0;
1304 } else {
1305 return dapm_generic_check_power(w);
1306 }
1307 }
1308
1309 /* Check to see if a DAC has power */
1310 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
1311 {
1312 int out;
1313
1314 DAPM_UPDATE_STAT(w, power_checks);
1315
1316 if (w->active) {
1317 out = is_connected_output_ep(w, NULL);
1318 dapm_clear_walk_output(w->dapm, &w->sinks);
1319 return out != 0;
1320 } else {
1321 return dapm_generic_check_power(w);
1322 }
1323 }
1324
1325 /* Check to see if a power supply is needed */
1326 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
1327 {
1328 struct snd_soc_dapm_path *path;
1329
1330 DAPM_UPDATE_STAT(w, power_checks);
1331
1332 /* Check if one of our outputs is connected */
1333 list_for_each_entry(path, &w->sinks, list_source) {
1334 DAPM_UPDATE_STAT(w, neighbour_checks);
1335
1336 if (path->weak)
1337 continue;
1338
1339 if (path->connected &&
1340 !path->connected(path->source, path->sink))
1341 continue;
1342
1343 if (!path->sink)
1344 continue;
1345
1346 if (dapm_widget_power_check(path->sink))
1347 return 1;
1348 }
1349
1350 return 0;
1351 }
1352
1353 static int dapm_always_on_check_power(struct snd_soc_dapm_widget *w)
1354 {
1355 return 1;
1356 }
1357
1358 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
1359 struct snd_soc_dapm_widget *b,
1360 bool power_up)
1361 {
1362 int *sort;
1363
1364 if (power_up)
1365 sort = dapm_up_seq;
1366 else
1367 sort = dapm_down_seq;
1368
1369 if (sort[a->id] != sort[b->id])
1370 return sort[a->id] - sort[b->id];
1371 if (a->subseq != b->subseq) {
1372 if (power_up)
1373 return a->subseq - b->subseq;
1374 else
1375 return b->subseq - a->subseq;
1376 }
1377 if (a->reg != b->reg)
1378 return a->reg - b->reg;
1379 if (a->dapm != b->dapm)
1380 return (unsigned long)a->dapm - (unsigned long)b->dapm;
1381
1382 return 0;
1383 }
1384
1385 /* Insert a widget in order into a DAPM power sequence. */
1386 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
1387 struct list_head *list,
1388 bool power_up)
1389 {
1390 struct snd_soc_dapm_widget *w;
1391
1392 list_for_each_entry(w, list, power_list)
1393 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
1394 list_add_tail(&new_widget->power_list, &w->power_list);
1395 return;
1396 }
1397
1398 list_add_tail(&new_widget->power_list, list);
1399 }
1400
1401 static void dapm_seq_check_event(struct snd_soc_card *card,
1402 struct snd_soc_dapm_widget *w, int event)
1403 {
1404 const char *ev_name;
1405 int power, ret;
1406
1407 switch (event) {
1408 case SND_SOC_DAPM_PRE_PMU:
1409 ev_name = "PRE_PMU";
1410 power = 1;
1411 break;
1412 case SND_SOC_DAPM_POST_PMU:
1413 ev_name = "POST_PMU";
1414 power = 1;
1415 break;
1416 case SND_SOC_DAPM_PRE_PMD:
1417 ev_name = "PRE_PMD";
1418 power = 0;
1419 break;
1420 case SND_SOC_DAPM_POST_PMD:
1421 ev_name = "POST_PMD";
1422 power = 0;
1423 break;
1424 case SND_SOC_DAPM_WILL_PMU:
1425 ev_name = "WILL_PMU";
1426 power = 1;
1427 break;
1428 case SND_SOC_DAPM_WILL_PMD:
1429 ev_name = "WILL_PMD";
1430 power = 0;
1431 break;
1432 default:
1433 WARN(1, "Unknown event %d\n", event);
1434 return;
1435 }
1436
1437 if (w->new_power != power)
1438 return;
1439
1440 if (w->event && (w->event_flags & event)) {
1441 pop_dbg(w->dapm->dev, card->pop_time, "pop test : %s %s\n",
1442 w->name, ev_name);
1443 soc_dapm_async_complete(w->dapm);
1444 trace_snd_soc_dapm_widget_event_start(w, event);
1445 ret = w->event(w, NULL, event);
1446 trace_snd_soc_dapm_widget_event_done(w, event);
1447 if (ret < 0)
1448 dev_err(w->dapm->dev, "ASoC: %s: %s event failed: %d\n",
1449 ev_name, w->name, ret);
1450 }
1451 }
1452
1453 /* Apply the coalesced changes from a DAPM sequence */
1454 static void dapm_seq_run_coalesced(struct snd_soc_card *card,
1455 struct list_head *pending)
1456 {
1457 struct snd_soc_dapm_widget *w;
1458 int reg;
1459 unsigned int value = 0;
1460 unsigned int mask = 0;
1461
1462 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
1463 power_list)->reg;
1464
1465 list_for_each_entry(w, pending, power_list) {
1466 WARN_ON(reg != w->reg);
1467 w->power = w->new_power;
1468
1469 mask |= w->mask << w->shift;
1470 if (w->power)
1471 value |= w->on_val << w->shift;
1472 else
1473 value |= w->off_val << w->shift;
1474
1475 pop_dbg(w->dapm->dev, card->pop_time,
1476 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
1477 w->name, reg, value, mask);
1478
1479 /* Check for events */
1480 dapm_seq_check_event(card, w, SND_SOC_DAPM_PRE_PMU);
1481 dapm_seq_check_event(card, w, SND_SOC_DAPM_PRE_PMD);
1482 }
1483
1484 if (reg >= 0) {
1485 /* Any widget will do, they should all be updating the
1486 * same register.
1487 */
1488 w = list_first_entry(pending, struct snd_soc_dapm_widget,
1489 power_list);
1490
1491 pop_dbg(w->dapm->dev, card->pop_time,
1492 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
1493 value, mask, reg, card->pop_time);
1494 pop_wait(card->pop_time);
1495 soc_widget_update_bits_locked(w, reg, mask, value);
1496 }
1497
1498 list_for_each_entry(w, pending, power_list) {
1499 dapm_seq_check_event(card, w, SND_SOC_DAPM_POST_PMU);
1500 dapm_seq_check_event(card, w, SND_SOC_DAPM_POST_PMD);
1501 }
1502 }
1503
1504 /* Apply a DAPM power sequence.
1505 *
1506 * We walk over a pre-sorted list of widgets to apply power to. In
1507 * order to minimise the number of writes to the device required
1508 * multiple widgets will be updated in a single write where possible.
1509 * Currently anything that requires more than a single write is not
1510 * handled.
1511 */
1512 static void dapm_seq_run(struct snd_soc_card *card,
1513 struct list_head *list, int event, bool power_up)
1514 {
1515 struct snd_soc_dapm_widget *w, *n;
1516 struct snd_soc_dapm_context *d;
1517 LIST_HEAD(pending);
1518 int cur_sort = -1;
1519 int cur_subseq = -1;
1520 int cur_reg = SND_SOC_NOPM;
1521 struct snd_soc_dapm_context *cur_dapm = NULL;
1522 int ret, i;
1523 int *sort;
1524
1525 if (power_up)
1526 sort = dapm_up_seq;
1527 else
1528 sort = dapm_down_seq;
1529
1530 list_for_each_entry_safe(w, n, list, power_list) {
1531 ret = 0;
1532
1533 /* Do we need to apply any queued changes? */
1534 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
1535 w->dapm != cur_dapm || w->subseq != cur_subseq) {
1536 if (!list_empty(&pending))
1537 dapm_seq_run_coalesced(card, &pending);
1538
1539 if (cur_dapm && cur_dapm->seq_notifier) {
1540 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1541 if (sort[i] == cur_sort)
1542 cur_dapm->seq_notifier(cur_dapm,
1543 i,
1544 cur_subseq);
1545 }
1546
1547 if (cur_dapm && w->dapm != cur_dapm)
1548 soc_dapm_async_complete(cur_dapm);
1549
1550 INIT_LIST_HEAD(&pending);
1551 cur_sort = -1;
1552 cur_subseq = INT_MIN;
1553 cur_reg = SND_SOC_NOPM;
1554 cur_dapm = NULL;
1555 }
1556
1557 switch (w->id) {
1558 case snd_soc_dapm_pre:
1559 if (!w->event)
1560 list_for_each_entry_safe_continue(w, n, list,
1561 power_list);
1562
1563 if (event == SND_SOC_DAPM_STREAM_START)
1564 ret = w->event(w,
1565 NULL, SND_SOC_DAPM_PRE_PMU);
1566 else if (event == SND_SOC_DAPM_STREAM_STOP)
1567 ret = w->event(w,
1568 NULL, SND_SOC_DAPM_PRE_PMD);
1569 break;
1570
1571 case snd_soc_dapm_post:
1572 if (!w->event)
1573 list_for_each_entry_safe_continue(w, n, list,
1574 power_list);
1575
1576 if (event == SND_SOC_DAPM_STREAM_START)
1577 ret = w->event(w,
1578 NULL, SND_SOC_DAPM_POST_PMU);
1579 else if (event == SND_SOC_DAPM_STREAM_STOP)
1580 ret = w->event(w,
1581 NULL, SND_SOC_DAPM_POST_PMD);
1582 break;
1583
1584 default:
1585 /* Queue it up for application */
1586 cur_sort = sort[w->id];
1587 cur_subseq = w->subseq;
1588 cur_reg = w->reg;
1589 cur_dapm = w->dapm;
1590 list_move(&w->power_list, &pending);
1591 break;
1592 }
1593
1594 if (ret < 0)
1595 dev_err(w->dapm->dev,
1596 "ASoC: Failed to apply widget power: %d\n", ret);
1597 }
1598
1599 if (!list_empty(&pending))
1600 dapm_seq_run_coalesced(card, &pending);
1601
1602 if (cur_dapm && cur_dapm->seq_notifier) {
1603 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1604 if (sort[i] == cur_sort)
1605 cur_dapm->seq_notifier(cur_dapm,
1606 i, cur_subseq);
1607 }
1608
1609 list_for_each_entry(d, &card->dapm_list, list) {
1610 soc_dapm_async_complete(d);
1611 }
1612 }
1613
1614 static void dapm_widget_update(struct snd_soc_card *card)
1615 {
1616 struct snd_soc_dapm_update *update = card->update;
1617 struct snd_soc_dapm_widget_list *wlist;
1618 struct snd_soc_dapm_widget *w = NULL;
1619 unsigned int wi;
1620 int ret;
1621
1622 if (!update || !dapm_kcontrol_is_powered(update->kcontrol))
1623 return;
1624
1625 wlist = dapm_kcontrol_get_wlist(update->kcontrol);
1626
1627 for (wi = 0; wi < wlist->num_widgets; wi++) {
1628 w = wlist->widgets[wi];
1629
1630 if (w->event && (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
1631 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
1632 if (ret != 0)
1633 dev_err(w->dapm->dev, "ASoC: %s DAPM pre-event failed: %d\n",
1634 w->name, ret);
1635 }
1636 }
1637
1638 if (!w)
1639 return;
1640
1641 ret = soc_widget_update_bits_locked(w, update->reg, update->mask,
1642 update->val);
1643 if (ret < 0)
1644 dev_err(w->dapm->dev, "ASoC: %s DAPM update failed: %d\n",
1645 w->name, ret);
1646
1647 for (wi = 0; wi < wlist->num_widgets; wi++) {
1648 w = wlist->widgets[wi];
1649
1650 if (w->event && (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1651 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1652 if (ret != 0)
1653 dev_err(w->dapm->dev, "ASoC: %s DAPM post-event failed: %d\n",
1654 w->name, ret);
1655 }
1656 }
1657 }
1658
1659 /* Async callback run prior to DAPM sequences - brings to _PREPARE if
1660 * they're changing state.
1661 */
1662 static void dapm_pre_sequence_async(void *data, async_cookie_t cookie)
1663 {
1664 struct snd_soc_dapm_context *d = data;
1665 int ret;
1666
1667 /* If we're off and we're not supposed to be go into STANDBY */
1668 if (d->bias_level == SND_SOC_BIAS_OFF &&
1669 d->target_bias_level != SND_SOC_BIAS_OFF) {
1670 if (d->dev)
1671 pm_runtime_get_sync(d->dev);
1672
1673 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1674 if (ret != 0)
1675 dev_err(d->dev,
1676 "ASoC: Failed to turn on bias: %d\n", ret);
1677 }
1678
1679 /* Prepare for a STADDBY->ON or ON->STANDBY transition */
1680 if (d->bias_level != d->target_bias_level) {
1681 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);
1682 if (ret != 0)
1683 dev_err(d->dev,
1684 "ASoC: Failed to prepare bias: %d\n", ret);
1685 }
1686 }
1687
1688 /* Async callback run prior to DAPM sequences - brings to their final
1689 * state.
1690 */
1691 static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
1692 {
1693 struct snd_soc_dapm_context *d = data;
1694 int ret;
1695
1696 /* If we just powered the last thing off drop to standby bias */
1697 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1698 (d->target_bias_level == SND_SOC_BIAS_STANDBY ||
1699 d->target_bias_level == SND_SOC_BIAS_OFF)) {
1700 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1701 if (ret != 0)
1702 dev_err(d->dev, "ASoC: Failed to apply standby bias: %d\n",
1703 ret);
1704 }
1705
1706 /* If we're in standby and can support bias off then do that */
1707 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1708 d->target_bias_level == SND_SOC_BIAS_OFF) {
1709 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);
1710 if (ret != 0)
1711 dev_err(d->dev, "ASoC: Failed to turn off bias: %d\n",
1712 ret);
1713
1714 if (d->dev)
1715 pm_runtime_put(d->dev);
1716 }
1717
1718 /* If we just powered up then move to active bias */
1719 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1720 d->target_bias_level == SND_SOC_BIAS_ON) {
1721 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);
1722 if (ret != 0)
1723 dev_err(d->dev, "ASoC: Failed to apply active bias: %d\n",
1724 ret);
1725 }
1726 }
1727
1728 static void dapm_widget_set_peer_power(struct snd_soc_dapm_widget *peer,
1729 bool power, bool connect)
1730 {
1731 /* If a connection is being made or broken then that update
1732 * will have marked the peer dirty, otherwise the widgets are
1733 * not connected and this update has no impact. */
1734 if (!connect)
1735 return;
1736
1737 /* If the peer is already in the state we're moving to then we
1738 * won't have an impact on it. */
1739 if (power != peer->power)
1740 dapm_mark_dirty(peer, "peer state change");
1741 }
1742
1743 static void dapm_widget_set_power(struct snd_soc_dapm_widget *w, bool power,
1744 struct list_head *up_list,
1745 struct list_head *down_list)
1746 {
1747 struct snd_soc_dapm_path *path;
1748
1749 if (w->power == power)
1750 return;
1751
1752 trace_snd_soc_dapm_widget_power(w, power);
1753
1754 /* If we changed our power state perhaps our neigbours changed
1755 * also.
1756 */
1757 list_for_each_entry(path, &w->sources, list_sink) {
1758 if (path->source) {
1759 dapm_widget_set_peer_power(path->source, power,
1760 path->connect);
1761 }
1762 }
1763 switch (w->id) {
1764 case snd_soc_dapm_supply:
1765 case snd_soc_dapm_regulator_supply:
1766 case snd_soc_dapm_clock_supply:
1767 case snd_soc_dapm_kcontrol:
1768 /* Supplies can't affect their outputs, only their inputs */
1769 break;
1770 default:
1771 list_for_each_entry(path, &w->sinks, list_source) {
1772 if (path->sink) {
1773 dapm_widget_set_peer_power(path->sink, power,
1774 path->connect);
1775 }
1776 }
1777 break;
1778 }
1779
1780 if (power)
1781 dapm_seq_insert(w, up_list, true);
1782 else
1783 dapm_seq_insert(w, down_list, false);
1784 }
1785
1786 static void dapm_power_one_widget(struct snd_soc_dapm_widget *w,
1787 struct list_head *up_list,
1788 struct list_head *down_list)
1789 {
1790 int power;
1791
1792 switch (w->id) {
1793 case snd_soc_dapm_pre:
1794 dapm_seq_insert(w, down_list, false);
1795 break;
1796 case snd_soc_dapm_post:
1797 dapm_seq_insert(w, up_list, true);
1798 break;
1799
1800 default:
1801 power = dapm_widget_power_check(w);
1802
1803 dapm_widget_set_power(w, power, up_list, down_list);
1804 break;
1805 }
1806 }
1807
1808 /*
1809 * Scan each dapm widget for complete audio path.
1810 * A complete path is a route that has valid endpoints i.e.:-
1811 *
1812 * o DAC to output pin.
1813 * o Input Pin to ADC.
1814 * o Input pin to Output pin (bypass, sidetone)
1815 * o DAC to ADC (loopback).
1816 */
1817 static int dapm_power_widgets(struct snd_soc_card *card, int event)
1818 {
1819 struct snd_soc_dapm_widget *w;
1820 struct snd_soc_dapm_context *d;
1821 LIST_HEAD(up_list);
1822 LIST_HEAD(down_list);
1823 ASYNC_DOMAIN_EXCLUSIVE(async_domain);
1824 enum snd_soc_bias_level bias;
1825
1826 trace_snd_soc_dapm_start(card);
1827
1828 list_for_each_entry(d, &card->dapm_list, list) {
1829 if (d->idle_bias_off)
1830 d->target_bias_level = SND_SOC_BIAS_OFF;
1831 else
1832 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1833 }
1834
1835 dapm_reset(card);
1836
1837 /* Check which widgets we need to power and store them in
1838 * lists indicating if they should be powered up or down. We
1839 * only check widgets that have been flagged as dirty but note
1840 * that new widgets may be added to the dirty list while we
1841 * iterate.
1842 */
1843 list_for_each_entry(w, &card->dapm_dirty, dirty) {
1844 dapm_power_one_widget(w, &up_list, &down_list);
1845 }
1846
1847 list_for_each_entry(w, &card->widgets, list) {
1848 switch (w->id) {
1849 case snd_soc_dapm_pre:
1850 case snd_soc_dapm_post:
1851 /* These widgets always need to be powered */
1852 break;
1853 default:
1854 list_del_init(&w->dirty);
1855 break;
1856 }
1857
1858 if (w->new_power) {
1859 d = w->dapm;
1860
1861 /* Supplies and micbiases only bring the
1862 * context up to STANDBY as unless something
1863 * else is active and passing audio they
1864 * generally don't require full power. Signal
1865 * generators are virtual pins and have no
1866 * power impact themselves.
1867 */
1868 switch (w->id) {
1869 case snd_soc_dapm_siggen:
1870 case snd_soc_dapm_vmid:
1871 break;
1872 case snd_soc_dapm_supply:
1873 case snd_soc_dapm_regulator_supply:
1874 case snd_soc_dapm_clock_supply:
1875 case snd_soc_dapm_micbias:
1876 if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
1877 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1878 break;
1879 default:
1880 d->target_bias_level = SND_SOC_BIAS_ON;
1881 break;
1882 }
1883 }
1884
1885 }
1886
1887 /* Force all contexts in the card to the same bias state if
1888 * they're not ground referenced.
1889 */
1890 bias = SND_SOC_BIAS_OFF;
1891 list_for_each_entry(d, &card->dapm_list, list)
1892 if (d->target_bias_level > bias)
1893 bias = d->target_bias_level;
1894 list_for_each_entry(d, &card->dapm_list, list)
1895 if (!d->idle_bias_off)
1896 d->target_bias_level = bias;
1897
1898 trace_snd_soc_dapm_walk_done(card);
1899
1900 /* Run all the bias changes in parallel */
1901 list_for_each_entry(d, &card->dapm_list, list)
1902 async_schedule_domain(dapm_pre_sequence_async, d,
1903 &async_domain);
1904 async_synchronize_full_domain(&async_domain);
1905
1906 list_for_each_entry(w, &down_list, power_list) {
1907 dapm_seq_check_event(card, w, SND_SOC_DAPM_WILL_PMD);
1908 }
1909
1910 list_for_each_entry(w, &up_list, power_list) {
1911 dapm_seq_check_event(card, w, SND_SOC_DAPM_WILL_PMU);
1912 }
1913
1914 /* Power down widgets first; try to avoid amplifying pops. */
1915 dapm_seq_run(card, &down_list, event, false);
1916
1917 dapm_widget_update(card);
1918
1919 /* Now power up. */
1920 dapm_seq_run(card, &up_list, event, true);
1921
1922 /* Run all the bias changes in parallel */
1923 list_for_each_entry(d, &card->dapm_list, list)
1924 async_schedule_domain(dapm_post_sequence_async, d,
1925 &async_domain);
1926 async_synchronize_full_domain(&async_domain);
1927
1928 /* do we need to notify any clients that DAPM event is complete */
1929 list_for_each_entry(d, &card->dapm_list, list) {
1930 if (d->stream_event)
1931 d->stream_event(d, event);
1932 }
1933
1934 pop_dbg(card->dev, card->pop_time,
1935 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
1936 pop_wait(card->pop_time);
1937
1938 trace_snd_soc_dapm_done(card);
1939
1940 return 0;
1941 }
1942
1943 #ifdef CONFIG_DEBUG_FS
1944 static ssize_t dapm_widget_power_read_file(struct file *file,
1945 char __user *user_buf,
1946 size_t count, loff_t *ppos)
1947 {
1948 struct snd_soc_dapm_widget *w = file->private_data;
1949 char *buf;
1950 int in, out;
1951 ssize_t ret;
1952 struct snd_soc_dapm_path *p = NULL;
1953
1954 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1955 if (!buf)
1956 return -ENOMEM;
1957
1958 in = is_connected_input_ep(w, NULL);
1959 dapm_clear_walk_input(w->dapm, &w->sources);
1960 out = is_connected_output_ep(w, NULL);
1961 dapm_clear_walk_output(w->dapm, &w->sinks);
1962
1963 ret = snprintf(buf, PAGE_SIZE, "%s: %s%s in %d out %d",
1964 w->name, w->power ? "On" : "Off",
1965 w->force ? " (forced)" : "", in, out);
1966
1967 if (w->reg >= 0)
1968 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1969 " - R%d(0x%x) mask 0x%x",
1970 w->reg, w->reg, w->mask << w->shift);
1971
1972 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1973
1974 if (w->sname)
1975 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1976 w->sname,
1977 w->active ? "active" : "inactive");
1978
1979 list_for_each_entry(p, &w->sources, list_sink) {
1980 if (p->connected && !p->connected(w, p->source))
1981 continue;
1982
1983 if (p->connect)
1984 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1985 " in \"%s\" \"%s\"\n",
1986 p->name ? p->name : "static",
1987 p->source->name);
1988 }
1989 list_for_each_entry(p, &w->sinks, list_source) {
1990 if (p->connected && !p->connected(w, p->sink))
1991 continue;
1992
1993 if (p->connect)
1994 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1995 " out \"%s\" \"%s\"\n",
1996 p->name ? p->name : "static",
1997 p->sink->name);
1998 }
1999
2000 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
2001
2002 kfree(buf);
2003 return ret;
2004 }
2005
2006 static const struct file_operations dapm_widget_power_fops = {
2007 .open = simple_open,
2008 .read = dapm_widget_power_read_file,
2009 .llseek = default_llseek,
2010 };
2011
2012 static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
2013 size_t count, loff_t *ppos)
2014 {
2015 struct snd_soc_dapm_context *dapm = file->private_data;
2016 char *level;
2017
2018 switch (dapm->bias_level) {
2019 case SND_SOC_BIAS_ON:
2020 level = "On\n";
2021 break;
2022 case SND_SOC_BIAS_PREPARE:
2023 level = "Prepare\n";
2024 break;
2025 case SND_SOC_BIAS_STANDBY:
2026 level = "Standby\n";
2027 break;
2028 case SND_SOC_BIAS_OFF:
2029 level = "Off\n";
2030 break;
2031 default:
2032 WARN(1, "Unknown bias_level %d\n", dapm->bias_level);
2033 level = "Unknown\n";
2034 break;
2035 }
2036
2037 return simple_read_from_buffer(user_buf, count, ppos, level,
2038 strlen(level));
2039 }
2040
2041 static const struct file_operations dapm_bias_fops = {
2042 .open = simple_open,
2043 .read = dapm_bias_read_file,
2044 .llseek = default_llseek,
2045 };
2046
2047 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
2048 struct dentry *parent)
2049 {
2050 struct dentry *d;
2051
2052 dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
2053
2054 if (!dapm->debugfs_dapm) {
2055 dev_warn(dapm->dev,
2056 "ASoC: Failed to create DAPM debugfs directory\n");
2057 return;
2058 }
2059
2060 d = debugfs_create_file("bias_level", 0444,
2061 dapm->debugfs_dapm, dapm,
2062 &dapm_bias_fops);
2063 if (!d)
2064 dev_warn(dapm->dev,
2065 "ASoC: Failed to create bias level debugfs file\n");
2066 }
2067
2068 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
2069 {
2070 struct snd_soc_dapm_context *dapm = w->dapm;
2071 struct dentry *d;
2072
2073 if (!dapm->debugfs_dapm || !w->name)
2074 return;
2075
2076 d = debugfs_create_file(w->name, 0444,
2077 dapm->debugfs_dapm, w,
2078 &dapm_widget_power_fops);
2079 if (!d)
2080 dev_warn(w->dapm->dev,
2081 "ASoC: Failed to create %s debugfs file\n",
2082 w->name);
2083 }
2084
2085 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
2086 {
2087 debugfs_remove_recursive(dapm->debugfs_dapm);
2088 }
2089
2090 #else
2091 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
2092 struct dentry *parent)
2093 {
2094 }
2095
2096 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
2097 {
2098 }
2099
2100 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
2101 {
2102 }
2103
2104 #endif
2105
2106 /* test and update the power status of a mux widget */
2107 static int soc_dapm_mux_update_power(struct snd_soc_card *card,
2108 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e)
2109 {
2110 struct snd_soc_dapm_path *path;
2111 int found = 0;
2112
2113 /* find dapm widget path assoc with kcontrol */
2114 dapm_kcontrol_for_each_path(path, kcontrol) {
2115 if (!path->name || !e->texts[mux])
2116 continue;
2117
2118 found = 1;
2119 /* we now need to match the string in the enum to the path */
2120 if (!(strcmp(path->name, e->texts[mux]))) {
2121 path->connect = 1; /* new connection */
2122 dapm_mark_dirty(path->source, "mux connection");
2123 } else {
2124 if (path->connect)
2125 dapm_mark_dirty(path->source,
2126 "mux disconnection");
2127 path->connect = 0; /* old connection must be powered down */
2128 }
2129 dapm_mark_dirty(path->sink, "mux change");
2130 }
2131
2132 if (found)
2133 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2134
2135 return found;
2136 }
2137
2138 int snd_soc_dapm_mux_update_power(struct snd_soc_dapm_context *dapm,
2139 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e,
2140 struct snd_soc_dapm_update *update)
2141 {
2142 struct snd_soc_card *card = dapm->card;
2143 int ret;
2144
2145 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2146 card->update = update;
2147 ret = soc_dapm_mux_update_power(card, kcontrol, mux, e);
2148 card->update = NULL;
2149 mutex_unlock(&card->dapm_mutex);
2150 if (ret > 0)
2151 soc_dpcm_runtime_update(card);
2152 return ret;
2153 }
2154 EXPORT_SYMBOL_GPL(snd_soc_dapm_mux_update_power);
2155
2156 /* test and update the power status of a mixer or switch widget */
2157 static int soc_dapm_mixer_update_power(struct snd_soc_card *card,
2158 struct snd_kcontrol *kcontrol, int connect)
2159 {
2160 struct snd_soc_dapm_path *path;
2161 int found = 0;
2162
2163 /* find dapm widget path assoc with kcontrol */
2164 dapm_kcontrol_for_each_path(path, kcontrol) {
2165 found = 1;
2166 path->connect = connect;
2167 dapm_mark_dirty(path->source, "mixer connection");
2168 dapm_mark_dirty(path->sink, "mixer update");
2169 }
2170
2171 if (found)
2172 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2173
2174 return found;
2175 }
2176
2177 int snd_soc_dapm_mixer_update_power(struct snd_soc_dapm_context *dapm,
2178 struct snd_kcontrol *kcontrol, int connect,
2179 struct snd_soc_dapm_update *update)
2180 {
2181 struct snd_soc_card *card = dapm->card;
2182 int ret;
2183
2184 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2185 card->update = update;
2186 ret = soc_dapm_mixer_update_power(card, kcontrol, connect);
2187 card->update = NULL;
2188 mutex_unlock(&card->dapm_mutex);
2189 if (ret > 0)
2190 soc_dpcm_runtime_update(card);
2191 return ret;
2192 }
2193 EXPORT_SYMBOL_GPL(snd_soc_dapm_mixer_update_power);
2194
2195 /* show dapm widget status in sys fs */
2196 static ssize_t dapm_widget_show(struct device *dev,
2197 struct device_attribute *attr, char *buf)
2198 {
2199 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
2200 struct snd_soc_codec *codec =rtd->codec;
2201 struct snd_soc_dapm_widget *w;
2202 int count = 0;
2203 char *state = "not set";
2204
2205 list_for_each_entry(w, &codec->card->widgets, list) {
2206 if (w->dapm != &codec->dapm)
2207 continue;
2208
2209 /* only display widgets that burnm power */
2210 switch (w->id) {
2211 case snd_soc_dapm_hp:
2212 case snd_soc_dapm_mic:
2213 case snd_soc_dapm_spk:
2214 case snd_soc_dapm_line:
2215 case snd_soc_dapm_micbias:
2216 case snd_soc_dapm_dac:
2217 case snd_soc_dapm_adc:
2218 case snd_soc_dapm_pga:
2219 case snd_soc_dapm_out_drv:
2220 case snd_soc_dapm_mixer:
2221 case snd_soc_dapm_mixer_named_ctl:
2222 case snd_soc_dapm_supply:
2223 case snd_soc_dapm_regulator_supply:
2224 case snd_soc_dapm_clock_supply:
2225 if (w->name)
2226 count += sprintf(buf + count, "%s: %s\n",
2227 w->name, w->power ? "On":"Off");
2228 break;
2229 default:
2230 break;
2231 }
2232 }
2233
2234 switch (codec->dapm.bias_level) {
2235 case SND_SOC_BIAS_ON:
2236 state = "On";
2237 break;
2238 case SND_SOC_BIAS_PREPARE:
2239 state = "Prepare";
2240 break;
2241 case SND_SOC_BIAS_STANDBY:
2242 state = "Standby";
2243 break;
2244 case SND_SOC_BIAS_OFF:
2245 state = "Off";
2246 break;
2247 }
2248 count += sprintf(buf + count, "PM State: %s\n", state);
2249
2250 return count;
2251 }
2252
2253 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
2254
2255 int snd_soc_dapm_sys_add(struct device *dev)
2256 {
2257 return device_create_file(dev, &dev_attr_dapm_widget);
2258 }
2259
2260 static void snd_soc_dapm_sys_remove(struct device *dev)
2261 {
2262 device_remove_file(dev, &dev_attr_dapm_widget);
2263 }
2264
2265 static void dapm_free_path(struct snd_soc_dapm_path *path)
2266 {
2267 list_del(&path->list_sink);
2268 list_del(&path->list_source);
2269 list_del(&path->list_kcontrol);
2270 list_del(&path->list);
2271 kfree(path);
2272 }
2273
2274 /* free all dapm widgets and resources */
2275 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
2276 {
2277 struct snd_soc_dapm_widget *w, *next_w;
2278 struct snd_soc_dapm_path *p, *next_p;
2279
2280 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
2281 if (w->dapm != dapm)
2282 continue;
2283 list_del(&w->list);
2284 /*
2285 * remove source and sink paths associated to this widget.
2286 * While removing the path, remove reference to it from both
2287 * source and sink widgets so that path is removed only once.
2288 */
2289 list_for_each_entry_safe(p, next_p, &w->sources, list_sink)
2290 dapm_free_path(p);
2291
2292 list_for_each_entry_safe(p, next_p, &w->sinks, list_source)
2293 dapm_free_path(p);
2294
2295 kfree(w->kcontrols);
2296 kfree(w->name);
2297 kfree(w);
2298 }
2299 }
2300
2301 static struct snd_soc_dapm_widget *dapm_find_widget(
2302 struct snd_soc_dapm_context *dapm, const char *pin,
2303 bool search_other_contexts)
2304 {
2305 struct snd_soc_dapm_widget *w;
2306 struct snd_soc_dapm_widget *fallback = NULL;
2307
2308 list_for_each_entry(w, &dapm->card->widgets, list) {
2309 if (!strcmp(w->name, pin)) {
2310 if (w->dapm == dapm)
2311 return w;
2312 else
2313 fallback = w;
2314 }
2315 }
2316
2317 if (search_other_contexts)
2318 return fallback;
2319
2320 return NULL;
2321 }
2322
2323 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
2324 const char *pin, int status)
2325 {
2326 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2327
2328 if (!w) {
2329 dev_err(dapm->dev, "ASoC: DAPM unknown pin %s\n", pin);
2330 return -EINVAL;
2331 }
2332
2333 if (w->connected != status)
2334 dapm_mark_dirty(w, "pin configuration");
2335
2336 w->connected = status;
2337 if (status == 0)
2338 w->force = 0;
2339
2340 return 0;
2341 }
2342
2343 /**
2344 * snd_soc_dapm_sync - scan and power dapm paths
2345 * @dapm: DAPM context
2346 *
2347 * Walks all dapm audio paths and powers widgets according to their
2348 * stream or path usage.
2349 *
2350 * Returns 0 for success.
2351 */
2352 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
2353 {
2354 int ret;
2355
2356 /*
2357 * Suppress early reports (eg, jacks syncing their state) to avoid
2358 * silly DAPM runs during card startup.
2359 */
2360 if (!dapm->card || !dapm->card->instantiated)
2361 return 0;
2362
2363 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2364 ret = dapm_power_widgets(dapm->card, SND_SOC_DAPM_STREAM_NOP);
2365 mutex_unlock(&dapm->card->dapm_mutex);
2366 return ret;
2367 }
2368 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
2369
2370 static int snd_soc_dapm_add_path(struct snd_soc_dapm_context *dapm,
2371 struct snd_soc_dapm_widget *wsource, struct snd_soc_dapm_widget *wsink,
2372 const char *control,
2373 int (*connected)(struct snd_soc_dapm_widget *source,
2374 struct snd_soc_dapm_widget *sink))
2375 {
2376 struct snd_soc_dapm_path *path;
2377 int ret;
2378
2379 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
2380 if (!path)
2381 return -ENOMEM;
2382
2383 path->source = wsource;
2384 path->sink = wsink;
2385 path->connected = connected;
2386 INIT_LIST_HEAD(&path->list);
2387 INIT_LIST_HEAD(&path->list_kcontrol);
2388 INIT_LIST_HEAD(&path->list_source);
2389 INIT_LIST_HEAD(&path->list_sink);
2390
2391 /* check for external widgets */
2392 if (wsink->id == snd_soc_dapm_input) {
2393 if (wsource->id == snd_soc_dapm_micbias ||
2394 wsource->id == snd_soc_dapm_mic ||
2395 wsource->id == snd_soc_dapm_line ||
2396 wsource->id == snd_soc_dapm_output)
2397 wsink->ext = 1;
2398 }
2399 if (wsource->id == snd_soc_dapm_output) {
2400 if (wsink->id == snd_soc_dapm_spk ||
2401 wsink->id == snd_soc_dapm_hp ||
2402 wsink->id == snd_soc_dapm_line ||
2403 wsink->id == snd_soc_dapm_input)
2404 wsource->ext = 1;
2405 }
2406
2407 dapm_mark_dirty(wsource, "Route added");
2408 dapm_mark_dirty(wsink, "Route added");
2409
2410 /* connect static paths */
2411 if (control == NULL) {
2412 list_add(&path->list, &dapm->card->paths);
2413 list_add(&path->list_sink, &wsink->sources);
2414 list_add(&path->list_source, &wsource->sinks);
2415 path->connect = 1;
2416 return 0;
2417 }
2418
2419 /* connect dynamic paths */
2420 switch (wsink->id) {
2421 case snd_soc_dapm_adc:
2422 case snd_soc_dapm_dac:
2423 case snd_soc_dapm_pga:
2424 case snd_soc_dapm_out_drv:
2425 case snd_soc_dapm_input:
2426 case snd_soc_dapm_output:
2427 case snd_soc_dapm_siggen:
2428 case snd_soc_dapm_micbias:
2429 case snd_soc_dapm_vmid:
2430 case snd_soc_dapm_pre:
2431 case snd_soc_dapm_post:
2432 case snd_soc_dapm_supply:
2433 case snd_soc_dapm_regulator_supply:
2434 case snd_soc_dapm_clock_supply:
2435 case snd_soc_dapm_aif_in:
2436 case snd_soc_dapm_aif_out:
2437 case snd_soc_dapm_dai_in:
2438 case snd_soc_dapm_dai_out:
2439 case snd_soc_dapm_dai_link:
2440 case snd_soc_dapm_kcontrol:
2441 list_add(&path->list, &dapm->card->paths);
2442 list_add(&path->list_sink, &wsink->sources);
2443 list_add(&path->list_source, &wsource->sinks);
2444 path->connect = 1;
2445 return 0;
2446 case snd_soc_dapm_mux:
2447 case snd_soc_dapm_virt_mux:
2448 case snd_soc_dapm_value_mux:
2449 ret = dapm_connect_mux(dapm, wsource, wsink, path, control,
2450 &wsink->kcontrol_news[0]);
2451 if (ret != 0)
2452 goto err;
2453 break;
2454 case snd_soc_dapm_switch:
2455 case snd_soc_dapm_mixer:
2456 case snd_soc_dapm_mixer_named_ctl:
2457 ret = dapm_connect_mixer(dapm, wsource, wsink, path, control);
2458 if (ret != 0)
2459 goto err;
2460 break;
2461 case snd_soc_dapm_hp:
2462 case snd_soc_dapm_mic:
2463 case snd_soc_dapm_line:
2464 case snd_soc_dapm_spk:
2465 list_add(&path->list, &dapm->card->paths);
2466 list_add(&path->list_sink, &wsink->sources);
2467 list_add(&path->list_source, &wsource->sinks);
2468 path->connect = 0;
2469 return 0;
2470 }
2471
2472 return 0;
2473 err:
2474 kfree(path);
2475 return ret;
2476 }
2477
2478 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
2479 const struct snd_soc_dapm_route *route,
2480 unsigned int is_prefixed)
2481 {
2482 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
2483 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
2484 const char *sink;
2485 const char *source;
2486 char prefixed_sink[80];
2487 char prefixed_source[80];
2488 int ret;
2489
2490 if (dapm->codec && dapm->codec->name_prefix && !is_prefixed) {
2491 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
2492 dapm->codec->name_prefix, route->sink);
2493 sink = prefixed_sink;
2494 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
2495 dapm->codec->name_prefix, route->source);
2496 source = prefixed_source;
2497 } else {
2498 sink = route->sink;
2499 source = route->source;
2500 }
2501
2502 /*
2503 * find src and dest widgets over all widgets but favor a widget from
2504 * current DAPM context
2505 */
2506 list_for_each_entry(w, &dapm->card->widgets, list) {
2507 if (!wsink && !(strcmp(w->name, sink))) {
2508 wtsink = w;
2509 if (w->dapm == dapm)
2510 wsink = w;
2511 continue;
2512 }
2513 if (!wsource && !(strcmp(w->name, source))) {
2514 wtsource = w;
2515 if (w->dapm == dapm)
2516 wsource = w;
2517 }
2518 }
2519 /* use widget from another DAPM context if not found from this */
2520 if (!wsink)
2521 wsink = wtsink;
2522 if (!wsource)
2523 wsource = wtsource;
2524
2525 if (wsource == NULL) {
2526 dev_err(dapm->dev, "ASoC: no source widget found for %s\n",
2527 route->source);
2528 return -ENODEV;
2529 }
2530 if (wsink == NULL) {
2531 dev_err(dapm->dev, "ASoC: no sink widget found for %s\n",
2532 route->sink);
2533 return -ENODEV;
2534 }
2535
2536 ret = snd_soc_dapm_add_path(dapm, wsource, wsink, route->control,
2537 route->connected);
2538 if (ret)
2539 goto err;
2540
2541 return 0;
2542 err:
2543 dev_warn(dapm->dev, "ASoC: no dapm match for %s --> %s --> %s\n",
2544 source, route->control, sink);
2545 return ret;
2546 }
2547
2548 static int snd_soc_dapm_del_route(struct snd_soc_dapm_context *dapm,
2549 const struct snd_soc_dapm_route *route)
2550 {
2551 struct snd_soc_dapm_path *path, *p;
2552 const char *sink;
2553 const char *source;
2554 char prefixed_sink[80];
2555 char prefixed_source[80];
2556
2557 if (route->control) {
2558 dev_err(dapm->dev,
2559 "ASoC: Removal of routes with controls not supported\n");
2560 return -EINVAL;
2561 }
2562
2563 if (dapm->codec && dapm->codec->name_prefix) {
2564 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
2565 dapm->codec->name_prefix, route->sink);
2566 sink = prefixed_sink;
2567 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
2568 dapm->codec->name_prefix, route->source);
2569 source = prefixed_source;
2570 } else {
2571 sink = route->sink;
2572 source = route->source;
2573 }
2574
2575 path = NULL;
2576 list_for_each_entry(p, &dapm->card->paths, list) {
2577 if (strcmp(p->source->name, source) != 0)
2578 continue;
2579 if (strcmp(p->sink->name, sink) != 0)
2580 continue;
2581 path = p;
2582 break;
2583 }
2584
2585 if (path) {
2586 dapm_mark_dirty(path->source, "Route removed");
2587 dapm_mark_dirty(path->sink, "Route removed");
2588
2589 dapm_free_path(path);
2590 } else {
2591 dev_warn(dapm->dev, "ASoC: Route %s->%s does not exist\n",
2592 source, sink);
2593 }
2594
2595 return 0;
2596 }
2597
2598 /**
2599 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
2600 * @dapm: DAPM context
2601 * @route: audio routes
2602 * @num: number of routes
2603 *
2604 * Connects 2 dapm widgets together via a named audio path. The sink is
2605 * the widget receiving the audio signal, whilst the source is the sender
2606 * of the audio signal.
2607 *
2608 * Returns 0 for success else error. On error all resources can be freed
2609 * with a call to snd_soc_card_free().
2610 */
2611 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
2612 const struct snd_soc_dapm_route *route, int num)
2613 {
2614 int i, r, ret = 0;
2615
2616 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2617 for (i = 0; i < num; i++) {
2618 r = snd_soc_dapm_add_route(dapm, route, false);
2619 if (r < 0) {
2620 dev_err(dapm->dev, "ASoC: Failed to add route %s -> %s -> %s\n",
2621 route->source,
2622 route->control ? route->control : "direct",
2623 route->sink);
2624 ret = r;
2625 }
2626 route++;
2627 }
2628 mutex_unlock(&dapm->card->dapm_mutex);
2629
2630 return ret;
2631 }
2632 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
2633
2634 /**
2635 * snd_soc_dapm_del_routes - Remove routes between DAPM widgets
2636 * @dapm: DAPM context
2637 * @route: audio routes
2638 * @num: number of routes
2639 *
2640 * Removes routes from the DAPM context.
2641 */
2642 int snd_soc_dapm_del_routes(struct snd_soc_dapm_context *dapm,
2643 const struct snd_soc_dapm_route *route, int num)
2644 {
2645 int i, ret = 0;
2646
2647 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2648 for (i = 0; i < num; i++) {
2649 snd_soc_dapm_del_route(dapm, route);
2650 route++;
2651 }
2652 mutex_unlock(&dapm->card->dapm_mutex);
2653
2654 return ret;
2655 }
2656 EXPORT_SYMBOL_GPL(snd_soc_dapm_del_routes);
2657
2658 static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm,
2659 const struct snd_soc_dapm_route *route)
2660 {
2661 struct snd_soc_dapm_widget *source = dapm_find_widget(dapm,
2662 route->source,
2663 true);
2664 struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm,
2665 route->sink,
2666 true);
2667 struct snd_soc_dapm_path *path;
2668 int count = 0;
2669
2670 if (!source) {
2671 dev_err(dapm->dev, "ASoC: Unable to find source %s for weak route\n",
2672 route->source);
2673 return -ENODEV;
2674 }
2675
2676 if (!sink) {
2677 dev_err(dapm->dev, "ASoC: Unable to find sink %s for weak route\n",
2678 route->sink);
2679 return -ENODEV;
2680 }
2681
2682 if (route->control || route->connected)
2683 dev_warn(dapm->dev, "ASoC: Ignoring control for weak route %s->%s\n",
2684 route->source, route->sink);
2685
2686 list_for_each_entry(path, &source->sinks, list_source) {
2687 if (path->sink == sink) {
2688 path->weak = 1;
2689 count++;
2690 }
2691 }
2692
2693 if (count == 0)
2694 dev_err(dapm->dev, "ASoC: No path found for weak route %s->%s\n",
2695 route->source, route->sink);
2696 if (count > 1)
2697 dev_warn(dapm->dev, "ASoC: %d paths found for weak route %s->%s\n",
2698 count, route->source, route->sink);
2699
2700 return 0;
2701 }
2702
2703 /**
2704 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
2705 * @dapm: DAPM context
2706 * @route: audio routes
2707 * @num: number of routes
2708 *
2709 * Mark existing routes matching those specified in the passed array
2710 * as being weak, meaning that they are ignored for the purpose of
2711 * power decisions. The main intended use case is for sidetone paths
2712 * which couple audio between other independent paths if they are both
2713 * active in order to make the combination work better at the user
2714 * level but which aren't intended to be "used".
2715 *
2716 * Note that CODEC drivers should not use this as sidetone type paths
2717 * can frequently also be used as bypass paths.
2718 */
2719 int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm,
2720 const struct snd_soc_dapm_route *route, int num)
2721 {
2722 int i, err;
2723 int ret = 0;
2724
2725 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2726 for (i = 0; i < num; i++) {
2727 err = snd_soc_dapm_weak_route(dapm, route);
2728 if (err)
2729 ret = err;
2730 route++;
2731 }
2732 mutex_unlock(&dapm->card->dapm_mutex);
2733
2734 return ret;
2735 }
2736 EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes);
2737
2738 /**
2739 * snd_soc_dapm_new_widgets - add new dapm widgets
2740 * @dapm: DAPM context
2741 *
2742 * Checks the codec for any new dapm widgets and creates them if found.
2743 *
2744 * Returns 0 for success.
2745 */
2746 int snd_soc_dapm_new_widgets(struct snd_soc_card *card)
2747 {
2748 struct snd_soc_dapm_widget *w;
2749 unsigned int val;
2750
2751 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2752
2753 list_for_each_entry(w, &card->widgets, list)
2754 {
2755 if (w->new)
2756 continue;
2757
2758 if (w->num_kcontrols) {
2759 w->kcontrols = kzalloc(w->num_kcontrols *
2760 sizeof(struct snd_kcontrol *),
2761 GFP_KERNEL);
2762 if (!w->kcontrols) {
2763 mutex_unlock(&card->dapm_mutex);
2764 return -ENOMEM;
2765 }
2766 }
2767
2768 switch(w->id) {
2769 case snd_soc_dapm_switch:
2770 case snd_soc_dapm_mixer:
2771 case snd_soc_dapm_mixer_named_ctl:
2772 dapm_new_mixer(w);
2773 break;
2774 case snd_soc_dapm_mux:
2775 case snd_soc_dapm_virt_mux:
2776 case snd_soc_dapm_value_mux:
2777 dapm_new_mux(w);
2778 break;
2779 case snd_soc_dapm_pga:
2780 case snd_soc_dapm_out_drv:
2781 dapm_new_pga(w);
2782 break;
2783 default:
2784 break;
2785 }
2786
2787 /* Read the initial power state from the device */
2788 if (w->reg >= 0) {
2789 soc_widget_read(w, w->reg, &val);
2790 val = val >> w->shift;
2791 val &= w->mask;
2792 if (val == w->on_val)
2793 w->power = 1;
2794 }
2795
2796 w->new = 1;
2797
2798 dapm_mark_dirty(w, "new widget");
2799 dapm_debugfs_add_widget(w);
2800 }
2801
2802 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2803 mutex_unlock(&card->dapm_mutex);
2804 return 0;
2805 }
2806 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
2807
2808 /**
2809 * snd_soc_dapm_get_volsw - dapm mixer get callback
2810 * @kcontrol: mixer control
2811 * @ucontrol: control element information
2812 *
2813 * Callback to get the value of a dapm mixer control.
2814 *
2815 * Returns 0 for success.
2816 */
2817 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
2818 struct snd_ctl_elem_value *ucontrol)
2819 {
2820 struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
2821 struct snd_soc_card *card = codec->card;
2822 struct soc_mixer_control *mc =
2823 (struct soc_mixer_control *)kcontrol->private_value;
2824 int reg = mc->reg;
2825 unsigned int shift = mc->shift;
2826 int max = mc->max;
2827 unsigned int mask = (1 << fls(max)) - 1;
2828 unsigned int invert = mc->invert;
2829 unsigned int val;
2830
2831 if (snd_soc_volsw_is_stereo(mc))
2832 dev_warn(codec->dapm.dev,
2833 "ASoC: Control '%s' is stereo, which is not supported\n",
2834 kcontrol->id.name);
2835
2836 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2837 if (dapm_kcontrol_is_powered(kcontrol) && reg != SND_SOC_NOPM)
2838 val = (snd_soc_read(codec, reg) >> shift) & mask;
2839 else
2840 val = dapm_kcontrol_get_value(kcontrol);
2841 mutex_unlock(&card->dapm_mutex);
2842
2843 if (invert)
2844 ucontrol->value.integer.value[0] = max - val;
2845 else
2846 ucontrol->value.integer.value[0] = val;
2847
2848 return 0;
2849 }
2850 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
2851
2852 /**
2853 * snd_soc_dapm_put_volsw - dapm mixer set callback
2854 * @kcontrol: mixer control
2855 * @ucontrol: control element information
2856 *
2857 * Callback to set the value of a dapm mixer control.
2858 *
2859 * Returns 0 for success.
2860 */
2861 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
2862 struct snd_ctl_elem_value *ucontrol)
2863 {
2864 struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
2865 struct snd_soc_card *card = codec->card;
2866 struct soc_mixer_control *mc =
2867 (struct soc_mixer_control *)kcontrol->private_value;
2868 int reg = mc->reg;
2869 unsigned int shift = mc->shift;
2870 int max = mc->max;
2871 unsigned int mask = (1 << fls(max)) - 1;
2872 unsigned int invert = mc->invert;
2873 unsigned int val;
2874 int connect, change;
2875 struct snd_soc_dapm_update update;
2876 int ret = 0;
2877
2878 if (snd_soc_volsw_is_stereo(mc))
2879 dev_warn(codec->dapm.dev,
2880 "ASoC: Control '%s' is stereo, which is not supported\n",
2881 kcontrol->id.name);
2882
2883 val = (ucontrol->value.integer.value[0] & mask);
2884 connect = !!val;
2885
2886 if (invert)
2887 val = max - val;
2888
2889 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2890
2891 change = dapm_kcontrol_set_value(kcontrol, val);
2892
2893 if (reg != SND_SOC_NOPM) {
2894 mask = mask << shift;
2895 val = val << shift;
2896
2897 change = snd_soc_test_bits(codec, reg, mask, val);
2898 }
2899
2900 if (change) {
2901 if (reg != SND_SOC_NOPM) {
2902 update.kcontrol = kcontrol;
2903 update.reg = reg;
2904 update.mask = mask;
2905 update.val = val;
2906
2907 card->update = &update;
2908 }
2909
2910 ret = soc_dapm_mixer_update_power(card, kcontrol, connect);
2911
2912 card->update = NULL;
2913 }
2914
2915 mutex_unlock(&card->dapm_mutex);
2916
2917 if (ret > 0)
2918 soc_dpcm_runtime_update(card);
2919
2920 return change;
2921 }
2922 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
2923
2924 /**
2925 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
2926 * @kcontrol: mixer control
2927 * @ucontrol: control element information
2928 *
2929 * Callback to get the value of a dapm enumerated double mixer control.
2930 *
2931 * Returns 0 for success.
2932 */
2933 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
2934 struct snd_ctl_elem_value *ucontrol)
2935 {
2936 struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
2937 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2938 unsigned int val;
2939
2940 val = snd_soc_read(codec, e->reg);
2941 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & e->mask;
2942 if (e->shift_l != e->shift_r)
2943 ucontrol->value.enumerated.item[1] =
2944 (val >> e->shift_r) & e->mask;
2945
2946 return 0;
2947 }
2948 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
2949
2950 /**
2951 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
2952 * @kcontrol: mixer control
2953 * @ucontrol: control element information
2954 *
2955 * Callback to set the value of a dapm enumerated double mixer control.
2956 *
2957 * Returns 0 for success.
2958 */
2959 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
2960 struct snd_ctl_elem_value *ucontrol)
2961 {
2962 struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
2963 struct snd_soc_card *card = codec->card;
2964 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2965 unsigned int val, mux, change;
2966 unsigned int mask;
2967 struct snd_soc_dapm_update update;
2968 int ret = 0;
2969
2970 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2971 return -EINVAL;
2972 mux = ucontrol->value.enumerated.item[0];
2973 val = mux << e->shift_l;
2974 mask = e->mask << e->shift_l;
2975 if (e->shift_l != e->shift_r) {
2976 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2977 return -EINVAL;
2978 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2979 mask |= e->mask << e->shift_r;
2980 }
2981
2982 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2983
2984 change = snd_soc_test_bits(codec, e->reg, mask, val);
2985 if (change) {
2986 update.kcontrol = kcontrol;
2987 update.reg = e->reg;
2988 update.mask = mask;
2989 update.val = val;
2990 card->update = &update;
2991
2992 ret = soc_dapm_mux_update_power(card, kcontrol, mux, e);
2993
2994 card->update = NULL;
2995 }
2996
2997 mutex_unlock(&card->dapm_mutex);
2998
2999 if (ret > 0)
3000 soc_dpcm_runtime_update(card);
3001
3002 return change;
3003 }
3004 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
3005
3006 /**
3007 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
3008 * @kcontrol: mixer control
3009 * @ucontrol: control element information
3010 *
3011 * Returns 0 for success.
3012 */
3013 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
3014 struct snd_ctl_elem_value *ucontrol)
3015 {
3016 ucontrol->value.enumerated.item[0] = dapm_kcontrol_get_value(kcontrol);
3017 return 0;
3018 }
3019 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt);
3020
3021 /**
3022 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
3023 * @kcontrol: mixer control
3024 * @ucontrol: control element information
3025 *
3026 * Returns 0 for success.
3027 */
3028 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
3029 struct snd_ctl_elem_value *ucontrol)
3030 {
3031 struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
3032 struct snd_soc_card *card = codec->card;
3033 unsigned int value;
3034 struct soc_enum *e =
3035 (struct soc_enum *)kcontrol->private_value;
3036 int change;
3037 int ret = 0;
3038
3039 if (ucontrol->value.enumerated.item[0] >= e->max)
3040 return -EINVAL;
3041
3042 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3043
3044 value = ucontrol->value.enumerated.item[0];
3045 change = dapm_kcontrol_set_value(kcontrol, value);
3046 if (change)
3047 ret = soc_dapm_mux_update_power(card, kcontrol, value, e);
3048
3049 mutex_unlock(&card->dapm_mutex);
3050
3051 if (ret > 0)
3052 soc_dpcm_runtime_update(card);
3053
3054 return change;
3055 }
3056 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt);
3057
3058 /**
3059 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
3060 * callback
3061 * @kcontrol: mixer control
3062 * @ucontrol: control element information
3063 *
3064 * Callback to get the value of a dapm semi enumerated double mixer control.
3065 *
3066 * Semi enumerated mixer: the enumerated items are referred as values. Can be
3067 * used for handling bitfield coded enumeration for example.
3068 *
3069 * Returns 0 for success.
3070 */
3071 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
3072 struct snd_ctl_elem_value *ucontrol)
3073 {
3074 struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
3075 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
3076 unsigned int reg_val, val, mux;
3077
3078 reg_val = snd_soc_read(codec, e->reg);
3079 val = (reg_val >> e->shift_l) & e->mask;
3080 for (mux = 0; mux < e->max; mux++) {
3081 if (val == e->values[mux])
3082 break;
3083 }
3084 ucontrol->value.enumerated.item[0] = mux;
3085 if (e->shift_l != e->shift_r) {
3086 val = (reg_val >> e->shift_r) & e->mask;
3087 for (mux = 0; mux < e->max; mux++) {
3088 if (val == e->values[mux])
3089 break;
3090 }
3091 ucontrol->value.enumerated.item[1] = mux;
3092 }
3093
3094 return 0;
3095 }
3096 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
3097
3098 /**
3099 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
3100 * callback
3101 * @kcontrol: mixer control
3102 * @ucontrol: control element information
3103 *
3104 * Callback to set the value of a dapm semi enumerated double mixer control.
3105 *
3106 * Semi enumerated mixer: the enumerated items are referred as values. Can be
3107 * used for handling bitfield coded enumeration for example.
3108 *
3109 * Returns 0 for success.
3110 */
3111 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
3112 struct snd_ctl_elem_value *ucontrol)
3113 {
3114 struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
3115 struct snd_soc_card *card = codec->card;
3116 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
3117 unsigned int val, mux, change;
3118 unsigned int mask;
3119 struct snd_soc_dapm_update update;
3120 int ret = 0;
3121
3122 if (ucontrol->value.enumerated.item[0] > e->max - 1)
3123 return -EINVAL;
3124 mux = ucontrol->value.enumerated.item[0];
3125 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
3126 mask = e->mask << e->shift_l;
3127 if (e->shift_l != e->shift_r) {
3128 if (ucontrol->value.enumerated.item[1] > e->max - 1)
3129 return -EINVAL;
3130 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
3131 mask |= e->mask << e->shift_r;
3132 }
3133
3134 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3135
3136 change = snd_soc_test_bits(codec, e->reg, mask, val);
3137 if (change) {
3138 update.kcontrol = kcontrol;
3139 update.reg = e->reg;
3140 update.mask = mask;
3141 update.val = val;
3142 card->update = &update;
3143
3144 ret = soc_dapm_mux_update_power(card, kcontrol, mux, e);
3145
3146 card->update = NULL;
3147 }
3148
3149 mutex_unlock(&card->dapm_mutex);
3150
3151 if (ret > 0)
3152 soc_dpcm_runtime_update(card);
3153
3154 return change;
3155 }
3156 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
3157
3158 /**
3159 * snd_soc_dapm_info_pin_switch - Info for a pin switch
3160 *
3161 * @kcontrol: mixer control
3162 * @uinfo: control element information
3163 *
3164 * Callback to provide information about a pin switch control.
3165 */
3166 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
3167 struct snd_ctl_elem_info *uinfo)
3168 {
3169 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
3170 uinfo->count = 1;
3171 uinfo->value.integer.min = 0;
3172 uinfo->value.integer.max = 1;
3173
3174 return 0;
3175 }
3176 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
3177
3178 /**
3179 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
3180 *
3181 * @kcontrol: mixer control
3182 * @ucontrol: Value
3183 */
3184 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
3185 struct snd_ctl_elem_value *ucontrol)
3186 {
3187 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
3188 const char *pin = (const char *)kcontrol->private_value;
3189
3190 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3191
3192 ucontrol->value.integer.value[0] =
3193 snd_soc_dapm_get_pin_status(&card->dapm, pin);
3194
3195 mutex_unlock(&card->dapm_mutex);
3196
3197 return 0;
3198 }
3199 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
3200
3201 /**
3202 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
3203 *
3204 * @kcontrol: mixer control
3205 * @ucontrol: Value
3206 */
3207 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
3208 struct snd_ctl_elem_value *ucontrol)
3209 {
3210 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
3211 const char *pin = (const char *)kcontrol->private_value;
3212
3213 if (ucontrol->value.integer.value[0])
3214 snd_soc_dapm_enable_pin(&card->dapm, pin);
3215 else
3216 snd_soc_dapm_disable_pin(&card->dapm, pin);
3217
3218 snd_soc_dapm_sync(&card->dapm);
3219 return 0;
3220 }
3221 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
3222
3223 static struct snd_soc_dapm_widget *
3224 snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
3225 const struct snd_soc_dapm_widget *widget)
3226 {
3227 struct snd_soc_dapm_widget *w;
3228 int ret;
3229
3230 if ((w = dapm_cnew_widget(widget)) == NULL)
3231 return NULL;
3232
3233 switch (w->id) {
3234 case snd_soc_dapm_regulator_supply:
3235 w->regulator = devm_regulator_get(dapm->dev, w->name);
3236 if (IS_ERR(w->regulator)) {
3237 ret = PTR_ERR(w->regulator);
3238 dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n",
3239 w->name, ret);
3240 return NULL;
3241 }
3242
3243 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
3244 ret = regulator_allow_bypass(w->regulator, true);
3245 if (ret != 0)
3246 dev_warn(w->dapm->dev,
3247 "ASoC: Failed to bypass %s: %d\n",
3248 w->name, ret);
3249 }
3250 break;
3251 case snd_soc_dapm_clock_supply:
3252 #ifdef CONFIG_CLKDEV_LOOKUP
3253 w->clk = devm_clk_get(dapm->dev, w->name);
3254 if (IS_ERR(w->clk)) {
3255 ret = PTR_ERR(w->clk);
3256 dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n",
3257 w->name, ret);
3258 return NULL;
3259 }
3260 #else
3261 return NULL;
3262 #endif
3263 break;
3264 default:
3265 break;
3266 }
3267
3268 if (dapm->codec && dapm->codec->name_prefix)
3269 w->name = kasprintf(GFP_KERNEL, "%s %s",
3270 dapm->codec->name_prefix, widget->name);
3271 else
3272 w->name = kasprintf(GFP_KERNEL, "%s", widget->name);
3273
3274 if (w->name == NULL) {
3275 kfree(w);
3276 return NULL;
3277 }
3278
3279 switch (w->id) {
3280 case snd_soc_dapm_switch:
3281 case snd_soc_dapm_mixer:
3282 case snd_soc_dapm_mixer_named_ctl:
3283 w->power_check = dapm_generic_check_power;
3284 break;
3285 case snd_soc_dapm_mux:
3286 case snd_soc_dapm_virt_mux:
3287 case snd_soc_dapm_value_mux:
3288 w->power_check = dapm_generic_check_power;
3289 break;
3290 case snd_soc_dapm_dai_out:
3291 w->power_check = dapm_adc_check_power;
3292 break;
3293 case snd_soc_dapm_dai_in:
3294 w->power_check = dapm_dac_check_power;
3295 break;
3296 case snd_soc_dapm_adc:
3297 case snd_soc_dapm_aif_out:
3298 case snd_soc_dapm_dac:
3299 case snd_soc_dapm_aif_in:
3300 case snd_soc_dapm_pga:
3301 case snd_soc_dapm_out_drv:
3302 case snd_soc_dapm_input:
3303 case snd_soc_dapm_output:
3304 case snd_soc_dapm_micbias:
3305 case snd_soc_dapm_spk:
3306 case snd_soc_dapm_hp:
3307 case snd_soc_dapm_mic:
3308 case snd_soc_dapm_line:
3309 case snd_soc_dapm_dai_link:
3310 w->power_check = dapm_generic_check_power;
3311 break;
3312 case snd_soc_dapm_supply:
3313 case snd_soc_dapm_regulator_supply:
3314 case snd_soc_dapm_clock_supply:
3315 case snd_soc_dapm_kcontrol:
3316 w->power_check = dapm_supply_check_power;
3317 break;
3318 default:
3319 w->power_check = dapm_always_on_check_power;
3320 break;
3321 }
3322
3323 w->dapm = dapm;
3324 w->codec = dapm->codec;
3325 w->platform = dapm->platform;
3326 INIT_LIST_HEAD(&w->sources);
3327 INIT_LIST_HEAD(&w->sinks);
3328 INIT_LIST_HEAD(&w->list);
3329 INIT_LIST_HEAD(&w->dirty);
3330 list_add(&w->list, &dapm->card->widgets);
3331
3332 /* machine layer set ups unconnected pins and insertions */
3333 w->connected = 1;
3334 return w;
3335 }
3336
3337 /**
3338 * snd_soc_dapm_new_controls - create new dapm controls
3339 * @dapm: DAPM context
3340 * @widget: widget array
3341 * @num: number of widgets
3342 *
3343 * Creates new DAPM controls based upon the templates.
3344 *
3345 * Returns 0 for success else error.
3346 */
3347 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
3348 const struct snd_soc_dapm_widget *widget,
3349 int num)
3350 {
3351 struct snd_soc_dapm_widget *w;
3352 int i;
3353 int ret = 0;
3354
3355 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
3356 for (i = 0; i < num; i++) {
3357 w = snd_soc_dapm_new_control(dapm, widget);
3358 if (!w) {
3359 dev_err(dapm->dev,
3360 "ASoC: Failed to create DAPM control %s\n",
3361 widget->name);
3362 ret = -ENOMEM;
3363 break;
3364 }
3365 widget++;
3366 }
3367 mutex_unlock(&dapm->card->dapm_mutex);
3368 return ret;
3369 }
3370 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
3371
3372 static int snd_soc_dai_link_event(struct snd_soc_dapm_widget *w,
3373 struct snd_kcontrol *kcontrol, int event)
3374 {
3375 struct snd_soc_dapm_path *source_p, *sink_p;
3376 struct snd_soc_dai *source, *sink;
3377 const struct snd_soc_pcm_stream *config = w->params;
3378 struct snd_pcm_substream substream;
3379 struct snd_pcm_hw_params *params = NULL;
3380 u64 fmt;
3381 int ret;
3382
3383 if (WARN_ON(!config) ||
3384 WARN_ON(list_empty(&w->sources) || list_empty(&w->sinks)))
3385 return -EINVAL;
3386
3387 /* We only support a single source and sink, pick the first */
3388 source_p = list_first_entry(&w->sources, struct snd_soc_dapm_path,
3389 list_sink);
3390 sink_p = list_first_entry(&w->sinks, struct snd_soc_dapm_path,
3391 list_source);
3392
3393 if (WARN_ON(!source_p || !sink_p) ||
3394 WARN_ON(!sink_p->source || !source_p->sink) ||
3395 WARN_ON(!source_p->source || !sink_p->sink))
3396 return -EINVAL;
3397
3398 source = source_p->source->priv;
3399 sink = sink_p->sink->priv;
3400
3401 /* Be a little careful as we don't want to overflow the mask array */
3402 if (config->formats) {
3403 fmt = ffs(config->formats) - 1;
3404 } else {
3405 dev_warn(w->dapm->dev, "ASoC: Invalid format %llx specified\n",
3406 config->formats);
3407 fmt = 0;
3408 }
3409
3410 /* Currently very limited parameter selection */
3411 params = kzalloc(sizeof(*params), GFP_KERNEL);
3412 if (!params) {
3413 ret = -ENOMEM;
3414 goto out;
3415 }
3416 snd_mask_set(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), fmt);
3417
3418 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->min =
3419 config->rate_min;
3420 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->max =
3421 config->rate_max;
3422
3423 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->min
3424 = config->channels_min;
3425 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->max
3426 = config->channels_max;
3427
3428 memset(&substream, 0, sizeof(substream));
3429
3430 switch (event) {
3431 case SND_SOC_DAPM_PRE_PMU:
3432 if (source->driver->ops && source->driver->ops->hw_params) {
3433 substream.stream = SNDRV_PCM_STREAM_CAPTURE;
3434 ret = source->driver->ops->hw_params(&substream,
3435 params, source);
3436 if (ret != 0) {
3437 dev_err(source->dev,
3438 "ASoC: hw_params() failed: %d\n", ret);
3439 goto out;
3440 }
3441 }
3442
3443 if (sink->driver->ops && sink->driver->ops->hw_params) {
3444 substream.stream = SNDRV_PCM_STREAM_PLAYBACK;
3445 ret = sink->driver->ops->hw_params(&substream, params,
3446 sink);
3447 if (ret != 0) {
3448 dev_err(sink->dev,
3449 "ASoC: hw_params() failed: %d\n", ret);
3450 goto out;
3451 }
3452 }
3453 break;
3454
3455 case SND_SOC_DAPM_POST_PMU:
3456 ret = snd_soc_dai_digital_mute(sink, 0,
3457 SNDRV_PCM_STREAM_PLAYBACK);
3458 if (ret != 0 && ret != -ENOTSUPP)
3459 dev_warn(sink->dev, "ASoC: Failed to unmute: %d\n", ret);
3460 ret = 0;
3461 break;
3462
3463 case SND_SOC_DAPM_PRE_PMD:
3464 ret = snd_soc_dai_digital_mute(sink, 1,
3465 SNDRV_PCM_STREAM_PLAYBACK);
3466 if (ret != 0 && ret != -ENOTSUPP)
3467 dev_warn(sink->dev, "ASoC: Failed to mute: %d\n", ret);
3468 ret = 0;
3469 break;
3470
3471 default:
3472 WARN(1, "Unknown event %d\n", event);
3473 return -EINVAL;
3474 }
3475
3476 out:
3477 kfree(params);
3478 return ret;
3479 }
3480
3481 int snd_soc_dapm_new_pcm(struct snd_soc_card *card,
3482 const struct snd_soc_pcm_stream *params,
3483 struct snd_soc_dapm_widget *source,
3484 struct snd_soc_dapm_widget *sink)
3485 {
3486 struct snd_soc_dapm_route routes[2];
3487 struct snd_soc_dapm_widget template;
3488 struct snd_soc_dapm_widget *w;
3489 size_t len;
3490 char *link_name;
3491
3492 len = strlen(source->name) + strlen(sink->name) + 2;
3493 link_name = devm_kzalloc(card->dev, len, GFP_KERNEL);
3494 if (!link_name)
3495 return -ENOMEM;
3496 snprintf(link_name, len, "%s-%s", source->name, sink->name);
3497
3498 memset(&template, 0, sizeof(template));
3499 template.reg = SND_SOC_NOPM;
3500 template.id = snd_soc_dapm_dai_link;
3501 template.name = link_name;
3502 template.event = snd_soc_dai_link_event;
3503 template.event_flags = SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
3504 SND_SOC_DAPM_PRE_PMD;
3505
3506 dev_dbg(card->dev, "ASoC: adding %s widget\n", link_name);
3507
3508 w = snd_soc_dapm_new_control(&card->dapm, &template);
3509 if (!w) {
3510 dev_err(card->dev, "ASoC: Failed to create %s widget\n",
3511 link_name);
3512 return -ENOMEM;
3513 }
3514
3515 w->params = params;
3516
3517 memset(&routes, 0, sizeof(routes));
3518
3519 routes[0].source = source->name;
3520 routes[0].sink = link_name;
3521 routes[1].source = link_name;
3522 routes[1].sink = sink->name;
3523
3524 return snd_soc_dapm_add_routes(&card->dapm, routes,
3525 ARRAY_SIZE(routes));
3526 }
3527
3528 int snd_soc_dapm_new_dai_widgets(struct snd_soc_dapm_context *dapm,
3529 struct snd_soc_dai *dai)
3530 {
3531 struct snd_soc_dapm_widget template;
3532 struct snd_soc_dapm_widget *w;
3533
3534 WARN_ON(dapm->dev != dai->dev);
3535
3536 memset(&template, 0, sizeof(template));
3537 template.reg = SND_SOC_NOPM;
3538
3539 if (dai->driver->playback.stream_name) {
3540 template.id = snd_soc_dapm_dai_in;
3541 template.name = dai->driver->playback.stream_name;
3542 template.sname = dai->driver->playback.stream_name;
3543
3544 dev_dbg(dai->dev, "ASoC: adding %s widget\n",
3545 template.name);
3546
3547 w = snd_soc_dapm_new_control(dapm, &template);
3548 if (!w) {
3549 dev_err(dapm->dev, "ASoC: Failed to create %s widget\n",
3550 dai->driver->playback.stream_name);
3551 return -ENOMEM;
3552 }
3553
3554 w->priv = dai;
3555 dai->playback_widget = w;
3556 }
3557
3558 if (dai->driver->capture.stream_name) {
3559 template.id = snd_soc_dapm_dai_out;
3560 template.name = dai->driver->capture.stream_name;
3561 template.sname = dai->driver->capture.stream_name;
3562
3563 dev_dbg(dai->dev, "ASoC: adding %s widget\n",
3564 template.name);
3565
3566 w = snd_soc_dapm_new_control(dapm, &template);
3567 if (!w) {
3568 dev_err(dapm->dev, "ASoC: Failed to create %s widget\n",
3569 dai->driver->capture.stream_name);
3570 return -ENOMEM;
3571 }
3572
3573 w->priv = dai;
3574 dai->capture_widget = w;
3575 }
3576
3577 return 0;
3578 }
3579
3580 int snd_soc_dapm_link_dai_widgets(struct snd_soc_card *card)
3581 {
3582 struct snd_soc_dapm_widget *dai_w, *w;
3583 struct snd_soc_dai *dai;
3584
3585 /* For each DAI widget... */
3586 list_for_each_entry(dai_w, &card->widgets, list) {
3587 switch (dai_w->id) {
3588 case snd_soc_dapm_dai_in:
3589 case snd_soc_dapm_dai_out:
3590 break;
3591 default:
3592 continue;
3593 }
3594
3595 dai = dai_w->priv;
3596
3597 /* ...find all widgets with the same stream and link them */
3598 list_for_each_entry(w, &card->widgets, list) {
3599 if (w->dapm != dai_w->dapm)
3600 continue;
3601
3602 switch (w->id) {
3603 case snd_soc_dapm_dai_in:
3604 case snd_soc_dapm_dai_out:
3605 continue;
3606 default:
3607 break;
3608 }
3609
3610 if (!w->sname || !strstr(w->sname, dai_w->name))
3611 continue;
3612
3613 if (dai->driver->playback.stream_name &&
3614 strstr(w->sname,
3615 dai->driver->playback.stream_name)) {
3616 dev_dbg(dai->dev, "%s -> %s\n",
3617 dai->playback_widget->name, w->name);
3618
3619 snd_soc_dapm_add_path(w->dapm,
3620 dai->playback_widget, w, NULL, NULL);
3621 }
3622
3623 if (dai->driver->capture.stream_name &&
3624 strstr(w->sname,
3625 dai->driver->capture.stream_name)) {
3626 dev_dbg(dai->dev, "%s -> %s\n",
3627 w->name, dai->capture_widget->name);
3628
3629 snd_soc_dapm_add_path(w->dapm, w,
3630 dai->capture_widget, NULL, NULL);
3631 }
3632 }
3633 }
3634
3635 return 0;
3636 }
3637
3638 void snd_soc_dapm_connect_dai_link_widgets(struct snd_soc_card *card)
3639 {
3640 struct snd_soc_pcm_runtime *rtd = card->rtd;
3641 struct snd_soc_dai *cpu_dai, *codec_dai;
3642 struct snd_soc_dapm_route r;
3643 int i;
3644
3645 memset(&r, 0, sizeof(r));
3646
3647 /* for each BE DAI link... */
3648 for (i = 0; i < card->num_rtd; i++) {
3649 rtd = &card->rtd[i];
3650 cpu_dai = rtd->cpu_dai;
3651 codec_dai = rtd->codec_dai;
3652
3653 /* dynamic FE links have no fixed DAI mapping */
3654 if (rtd->dai_link->dynamic)
3655 continue;
3656
3657 /* there is no point in connecting BE DAI links with dummies */
3658 if (snd_soc_dai_is_dummy(codec_dai) ||
3659 snd_soc_dai_is_dummy(cpu_dai))
3660 continue;
3661
3662 /* connect BE DAI playback if widgets are valid */
3663 if (codec_dai->playback_widget && cpu_dai->playback_widget) {
3664 r.source = cpu_dai->playback_widget->name;
3665 r.sink = codec_dai->playback_widget->name;
3666 dev_dbg(rtd->dev, "connected DAI link %s:%s -> %s:%s\n",
3667 cpu_dai->codec->name, r.source,
3668 codec_dai->platform->name, r.sink);
3669
3670 snd_soc_dapm_add_route(&card->dapm, &r, true);
3671 }
3672
3673 /* connect BE DAI capture if widgets are valid */
3674 if (codec_dai->capture_widget && cpu_dai->capture_widget) {
3675 r.source = codec_dai->capture_widget->name;
3676 r.sink = cpu_dai->capture_widget->name;
3677 dev_dbg(rtd->dev, "connected DAI link %s:%s -> %s:%s\n",
3678 codec_dai->codec->name, r.source,
3679 cpu_dai->platform->name, r.sink);
3680
3681 snd_soc_dapm_add_route(&card->dapm, &r, true);
3682 }
3683
3684 }
3685 }
3686
3687 static void soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
3688 int event)
3689 {
3690
3691 struct snd_soc_dapm_widget *w_cpu, *w_codec;
3692 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
3693 struct snd_soc_dai *codec_dai = rtd->codec_dai;
3694
3695 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
3696 w_cpu = cpu_dai->playback_widget;
3697 w_codec = codec_dai->playback_widget;
3698 } else {
3699 w_cpu = cpu_dai->capture_widget;
3700 w_codec = codec_dai->capture_widget;
3701 }
3702
3703 if (w_cpu) {
3704
3705 dapm_mark_dirty(w_cpu, "stream event");
3706
3707 switch (event) {
3708 case SND_SOC_DAPM_STREAM_START:
3709 w_cpu->active = 1;
3710 break;
3711 case SND_SOC_DAPM_STREAM_STOP:
3712 w_cpu->active = 0;
3713 break;
3714 case SND_SOC_DAPM_STREAM_SUSPEND:
3715 case SND_SOC_DAPM_STREAM_RESUME:
3716 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
3717 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
3718 break;
3719 }
3720 }
3721
3722 if (w_codec) {
3723
3724 dapm_mark_dirty(w_codec, "stream event");
3725
3726 switch (event) {
3727 case SND_SOC_DAPM_STREAM_START:
3728 w_codec->active = 1;
3729 break;
3730 case SND_SOC_DAPM_STREAM_STOP:
3731 w_codec->active = 0;
3732 break;
3733 case SND_SOC_DAPM_STREAM_SUSPEND:
3734 case SND_SOC_DAPM_STREAM_RESUME:
3735 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
3736 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
3737 break;
3738 }
3739 }
3740
3741 dapm_power_widgets(rtd->card, event);
3742 }
3743
3744 /**
3745 * snd_soc_dapm_stream_event - send a stream event to the dapm core
3746 * @rtd: PCM runtime data
3747 * @stream: stream name
3748 * @event: stream event
3749 *
3750 * Sends a stream event to the dapm core. The core then makes any
3751 * necessary widget power changes.
3752 *
3753 * Returns 0 for success else error.
3754 */
3755 void snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
3756 int event)
3757 {
3758 struct snd_soc_card *card = rtd->card;
3759
3760 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3761 soc_dapm_stream_event(rtd, stream, event);
3762 mutex_unlock(&card->dapm_mutex);
3763 }
3764
3765 /**
3766 * snd_soc_dapm_enable_pin_unlocked - enable pin.
3767 * @dapm: DAPM context
3768 * @pin: pin name
3769 *
3770 * Enables input/output pin and its parents or children widgets iff there is
3771 * a valid audio route and active audio stream.
3772 *
3773 * Requires external locking.
3774 *
3775 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3776 * do any widget power switching.
3777 */
3778 int snd_soc_dapm_enable_pin_unlocked(struct snd_soc_dapm_context *dapm,
3779 const char *pin)
3780 {
3781 return snd_soc_dapm_set_pin(dapm, pin, 1);
3782 }
3783 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin_unlocked);
3784
3785 /**
3786 * snd_soc_dapm_enable_pin - enable pin.
3787 * @dapm: DAPM context
3788 * @pin: pin name
3789 *
3790 * Enables input/output pin and its parents or children widgets iff there is
3791 * a valid audio route and active audio stream.
3792 *
3793 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3794 * do any widget power switching.
3795 */
3796 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
3797 {
3798 int ret;
3799
3800 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3801
3802 ret = snd_soc_dapm_set_pin(dapm, pin, 1);
3803
3804 mutex_unlock(&dapm->card->dapm_mutex);
3805
3806 return ret;
3807 }
3808 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
3809
3810 /**
3811 * snd_soc_dapm_force_enable_pin_unlocked - force a pin to be enabled
3812 * @dapm: DAPM context
3813 * @pin: pin name
3814 *
3815 * Enables input/output pin regardless of any other state. This is
3816 * intended for use with microphone bias supplies used in microphone
3817 * jack detection.
3818 *
3819 * Requires external locking.
3820 *
3821 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3822 * do any widget power switching.
3823 */
3824 int snd_soc_dapm_force_enable_pin_unlocked(struct snd_soc_dapm_context *dapm,
3825 const char *pin)
3826 {
3827 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
3828
3829 if (!w) {
3830 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
3831 return -EINVAL;
3832 }
3833
3834 dev_dbg(w->dapm->dev, "ASoC: force enable pin %s\n", pin);
3835 w->connected = 1;
3836 w->force = 1;
3837 dapm_mark_dirty(w, "force enable");
3838
3839 return 0;
3840 }
3841 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin_unlocked);
3842
3843 /**
3844 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
3845 * @dapm: DAPM context
3846 * @pin: pin name
3847 *
3848 * Enables input/output pin regardless of any other state. This is
3849 * intended for use with microphone bias supplies used in microphone
3850 * jack detection.
3851 *
3852 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3853 * do any widget power switching.
3854 */
3855 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
3856 const char *pin)
3857 {
3858 int ret;
3859
3860 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3861
3862 ret = snd_soc_dapm_force_enable_pin_unlocked(dapm, pin);
3863
3864 mutex_unlock(&dapm->card->dapm_mutex);
3865
3866 return ret;
3867 }
3868 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
3869
3870 /**
3871 * snd_soc_dapm_disable_pin_unlocked - disable pin.
3872 * @dapm: DAPM context
3873 * @pin: pin name
3874 *
3875 * Disables input/output pin and its parents or children widgets.
3876 *
3877 * Requires external locking.
3878 *
3879 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3880 * do any widget power switching.
3881 */
3882 int snd_soc_dapm_disable_pin_unlocked(struct snd_soc_dapm_context *dapm,
3883 const char *pin)
3884 {
3885 return snd_soc_dapm_set_pin(dapm, pin, 0);
3886 }
3887 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin_unlocked);
3888
3889 /**
3890 * snd_soc_dapm_disable_pin - disable pin.
3891 * @dapm: DAPM context
3892 * @pin: pin name
3893 *
3894 * Disables input/output pin and its parents or children widgets.
3895 *
3896 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3897 * do any widget power switching.
3898 */
3899 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
3900 const char *pin)
3901 {
3902 int ret;
3903
3904 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3905
3906 ret = snd_soc_dapm_set_pin(dapm, pin, 0);
3907
3908 mutex_unlock(&dapm->card->dapm_mutex);
3909
3910 return ret;
3911 }
3912 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
3913
3914 /**
3915 * snd_soc_dapm_nc_pin_unlocked - permanently disable pin.
3916 * @dapm: DAPM context
3917 * @pin: pin name
3918 *
3919 * Marks the specified pin as being not connected, disabling it along
3920 * any parent or child widgets. At present this is identical to
3921 * snd_soc_dapm_disable_pin() but in future it will be extended to do
3922 * additional things such as disabling controls which only affect
3923 * paths through the pin.
3924 *
3925 * Requires external locking.
3926 *
3927 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3928 * do any widget power switching.
3929 */
3930 int snd_soc_dapm_nc_pin_unlocked(struct snd_soc_dapm_context *dapm,
3931 const char *pin)
3932 {
3933 return snd_soc_dapm_set_pin(dapm, pin, 0);
3934 }
3935 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin_unlocked);
3936
3937 /**
3938 * snd_soc_dapm_nc_pin - permanently disable pin.
3939 * @dapm: DAPM context
3940 * @pin: pin name
3941 *
3942 * Marks the specified pin as being not connected, disabling it along
3943 * any parent or child widgets. At present this is identical to
3944 * snd_soc_dapm_disable_pin() but in future it will be extended to do
3945 * additional things such as disabling controls which only affect
3946 * paths through the pin.
3947 *
3948 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3949 * do any widget power switching.
3950 */
3951 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
3952 {
3953 int ret;
3954
3955 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3956
3957 ret = snd_soc_dapm_set_pin(dapm, pin, 0);
3958
3959 mutex_unlock(&dapm->card->dapm_mutex);
3960
3961 return ret;
3962 }
3963 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
3964
3965 /**
3966 * snd_soc_dapm_get_pin_status - get audio pin status
3967 * @dapm: DAPM context
3968 * @pin: audio signal pin endpoint (or start point)
3969 *
3970 * Get audio pin status - connected or disconnected.
3971 *
3972 * Returns 1 for connected otherwise 0.
3973 */
3974 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
3975 const char *pin)
3976 {
3977 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
3978
3979 if (w)
3980 return w->connected;
3981
3982 return 0;
3983 }
3984 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
3985
3986 /**
3987 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
3988 * @dapm: DAPM context
3989 * @pin: audio signal pin endpoint (or start point)
3990 *
3991 * Mark the given endpoint or pin as ignoring suspend. When the
3992 * system is disabled a path between two endpoints flagged as ignoring
3993 * suspend will not be disabled. The path must already be enabled via
3994 * normal means at suspend time, it will not be turned on if it was not
3995 * already enabled.
3996 */
3997 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
3998 const char *pin)
3999 {
4000 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
4001
4002 if (!w) {
4003 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
4004 return -EINVAL;
4005 }
4006
4007 w->ignore_suspend = 1;
4008
4009 return 0;
4010 }
4011 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
4012
4013 static bool snd_soc_dapm_widget_in_card_paths(struct snd_soc_card *card,
4014 struct snd_soc_dapm_widget *w)
4015 {
4016 struct snd_soc_dapm_path *p;
4017
4018 list_for_each_entry(p, &card->paths, list) {
4019 if ((p->source == w) || (p->sink == w)) {
4020 dev_dbg(card->dev,
4021 "... Path %s(id:%d dapm:%p) - %s(id:%d dapm:%p)\n",
4022 p->source->name, p->source->id, p->source->dapm,
4023 p->sink->name, p->sink->id, p->sink->dapm);
4024
4025 /* Connected to something other than the codec */
4026 if (p->source->dapm != p->sink->dapm)
4027 return true;
4028 /*
4029 * Loopback connection from codec external pin to
4030 * codec external pin
4031 */
4032 if (p->sink->id == snd_soc_dapm_input) {
4033 switch (p->source->id) {
4034 case snd_soc_dapm_output:
4035 case snd_soc_dapm_micbias:
4036 return true;
4037 default:
4038 break;
4039 }
4040 }
4041 }
4042 }
4043
4044 return false;
4045 }
4046
4047 /**
4048 * snd_soc_dapm_auto_nc_codec_pins - call snd_soc_dapm_nc_pin for unused pins
4049 * @codec: The codec whose pins should be processed
4050 *
4051 * Automatically call snd_soc_dapm_nc_pin() for any external pins in the codec
4052 * which are unused. Pins are used if they are connected externally to the
4053 * codec, whether that be to some other device, or a loop-back connection to
4054 * the codec itself.
4055 */
4056 void snd_soc_dapm_auto_nc_codec_pins(struct snd_soc_codec *codec)
4057 {
4058 struct snd_soc_card *card = codec->card;
4059 struct snd_soc_dapm_context *dapm = &codec->dapm;
4060 struct snd_soc_dapm_widget *w;
4061
4062 dev_dbg(codec->dev, "ASoC: Auto NC: DAPMs: card:%p codec:%p\n",
4063 &card->dapm, &codec->dapm);
4064
4065 list_for_each_entry(w, &card->widgets, list) {
4066 if (w->dapm != dapm)
4067 continue;
4068 switch (w->id) {
4069 case snd_soc_dapm_input:
4070 case snd_soc_dapm_output:
4071 case snd_soc_dapm_micbias:
4072 dev_dbg(codec->dev, "ASoC: Auto NC: Checking widget %s\n",
4073 w->name);
4074 if (!snd_soc_dapm_widget_in_card_paths(card, w)) {
4075 dev_dbg(codec->dev,
4076 "... Not in map; disabling\n");
4077 snd_soc_dapm_nc_pin(dapm, w->name);
4078 }
4079 break;
4080 default:
4081 break;
4082 }
4083 }
4084 }
4085
4086 /**
4087 * snd_soc_dapm_free - free dapm resources
4088 * @dapm: DAPM context
4089 *
4090 * Free all dapm widgets and resources.
4091 */
4092 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
4093 {
4094 snd_soc_dapm_sys_remove(dapm->dev);
4095 dapm_debugfs_cleanup(dapm);
4096 dapm_free_widgets(dapm);
4097 list_del(&dapm->list);
4098 }
4099 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
4100
4101 static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context *dapm)
4102 {
4103 struct snd_soc_card *card = dapm->card;
4104 struct snd_soc_dapm_widget *w;
4105 LIST_HEAD(down_list);
4106 int powerdown = 0;
4107
4108 mutex_lock(&card->dapm_mutex);
4109
4110 list_for_each_entry(w, &dapm->card->widgets, list) {
4111 if (w->dapm != dapm)
4112 continue;
4113 if (w->power) {
4114 dapm_seq_insert(w, &down_list, false);
4115 w->power = 0;
4116 powerdown = 1;
4117 }
4118 }
4119
4120 /* If there were no widgets to power down we're already in
4121 * standby.
4122 */
4123 if (powerdown) {
4124 if (dapm->bias_level == SND_SOC_BIAS_ON)
4125 snd_soc_dapm_set_bias_level(dapm,
4126 SND_SOC_BIAS_PREPARE);
4127 dapm_seq_run(card, &down_list, 0, false);
4128 if (dapm->bias_level == SND_SOC_BIAS_PREPARE)
4129 snd_soc_dapm_set_bias_level(dapm,
4130 SND_SOC_BIAS_STANDBY);
4131 }
4132
4133 mutex_unlock(&card->dapm_mutex);
4134 }
4135
4136 /*
4137 * snd_soc_dapm_shutdown - callback for system shutdown
4138 */
4139 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
4140 {
4141 struct snd_soc_codec *codec;
4142
4143 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
4144 soc_dapm_shutdown_codec(&codec->dapm);
4145 if (codec->dapm.bias_level == SND_SOC_BIAS_STANDBY)
4146 snd_soc_dapm_set_bias_level(&codec->dapm,
4147 SND_SOC_BIAS_OFF);
4148 }
4149 }
4150
4151 /* Module information */
4152 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
4153 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
4154 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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