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[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 static 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
158 void dapm_mark_io_dirty(struct snd_soc_dapm_context *dapm)
159 {
160 struct snd_soc_card *card = dapm->card;
161 struct snd_soc_dapm_widget *w;
162
163 mutex_lock(&card->dapm_mutex);
164
165 list_for_each_entry(w, &card->widgets, list) {
166 switch (w->id) {
167 case snd_soc_dapm_input:
168 case snd_soc_dapm_output:
169 dapm_mark_dirty(w, "Rechecking inputs and outputs");
170 break;
171 default:
172 break;
173 }
174 }
175
176 mutex_unlock(&card->dapm_mutex);
177 }
178 EXPORT_SYMBOL_GPL(dapm_mark_io_dirty);
179
180 /* create a new dapm widget */
181 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
182 const struct snd_soc_dapm_widget *_widget)
183 {
184 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
185 }
186
187 struct dapm_kcontrol_data {
188 unsigned int value;
189 struct snd_soc_dapm_widget *widget;
190 struct list_head paths;
191 struct snd_soc_dapm_widget_list *wlist;
192 };
193
194 static int dapm_kcontrol_data_alloc(struct snd_soc_dapm_widget *widget,
195 struct snd_kcontrol *kcontrol)
196 {
197 struct dapm_kcontrol_data *data;
198 struct soc_mixer_control *mc;
199
200 data = kzalloc(sizeof(*data), GFP_KERNEL);
201 if (!data) {
202 dev_err(widget->dapm->dev,
203 "ASoC: can't allocate kcontrol data for %s\n",
204 widget->name);
205 return -ENOMEM;
206 }
207
208 INIT_LIST_HEAD(&data->paths);
209
210 switch (widget->id) {
211 case snd_soc_dapm_switch:
212 case snd_soc_dapm_mixer:
213 case snd_soc_dapm_mixer_named_ctl:
214 mc = (struct soc_mixer_control *)kcontrol->private_value;
215
216 if (mc->autodisable) {
217 struct snd_soc_dapm_widget template;
218
219 memset(&template, 0, sizeof(template));
220 template.reg = mc->reg;
221 template.mask = (1 << fls(mc->max)) - 1;
222 template.shift = mc->shift;
223 if (mc->invert)
224 template.off_val = mc->max;
225 else
226 template.off_val = 0;
227 template.on_val = template.off_val;
228 template.id = snd_soc_dapm_kcontrol;
229 template.name = kcontrol->id.name;
230
231 data->value = template.on_val;
232
233 data->widget = snd_soc_dapm_new_control(widget->dapm,
234 &template);
235 if (!data->widget) {
236 kfree(data);
237 return -ENOMEM;
238 }
239 }
240 break;
241 default:
242 break;
243 }
244
245 kcontrol->private_data = data;
246
247 return 0;
248 }
249
250 static void dapm_kcontrol_free(struct snd_kcontrol *kctl)
251 {
252 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kctl);
253 kfree(data->widget);
254 kfree(data->wlist);
255 kfree(data);
256 }
257
258 static struct snd_soc_dapm_widget_list *dapm_kcontrol_get_wlist(
259 const struct snd_kcontrol *kcontrol)
260 {
261 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
262
263 return data->wlist;
264 }
265
266 static int dapm_kcontrol_add_widget(struct snd_kcontrol *kcontrol,
267 struct snd_soc_dapm_widget *widget)
268 {
269 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
270 struct snd_soc_dapm_widget_list *new_wlist;
271 unsigned int n;
272
273 if (data->wlist)
274 n = data->wlist->num_widgets + 1;
275 else
276 n = 1;
277
278 new_wlist = krealloc(data->wlist,
279 sizeof(*new_wlist) + sizeof(widget) * n, GFP_KERNEL);
280 if (!new_wlist)
281 return -ENOMEM;
282
283 new_wlist->widgets[n - 1] = widget;
284 new_wlist->num_widgets = n;
285
286 data->wlist = new_wlist;
287
288 return 0;
289 }
290
291 static void dapm_kcontrol_add_path(const struct snd_kcontrol *kcontrol,
292 struct snd_soc_dapm_path *path)
293 {
294 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
295
296 list_add_tail(&path->list_kcontrol, &data->paths);
297
298 if (data->widget) {
299 snd_soc_dapm_add_path(data->widget->dapm, data->widget,
300 path->source, NULL, NULL);
301 }
302 }
303
304 static bool dapm_kcontrol_is_powered(const struct snd_kcontrol *kcontrol)
305 {
306 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
307
308 if (!data->widget)
309 return true;
310
311 return data->widget->power;
312 }
313
314 static struct list_head *dapm_kcontrol_get_path_list(
315 const struct snd_kcontrol *kcontrol)
316 {
317 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
318
319 return &data->paths;
320 }
321
322 #define dapm_kcontrol_for_each_path(path, kcontrol) \
323 list_for_each_entry(path, dapm_kcontrol_get_path_list(kcontrol), \
324 list_kcontrol)
325
326 static unsigned int dapm_kcontrol_get_value(const struct snd_kcontrol *kcontrol)
327 {
328 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
329
330 return data->value;
331 }
332
333 static bool dapm_kcontrol_set_value(const struct snd_kcontrol *kcontrol,
334 unsigned int value)
335 {
336 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
337
338 if (data->value == value)
339 return false;
340
341 if (data->widget)
342 data->widget->on_val = value;
343
344 data->value = value;
345
346 return true;
347 }
348
349 /**
350 * snd_soc_dapm_kcontrol_codec() - Returns the codec associated to a kcontrol
351 * @kcontrol: The kcontrol
352 */
353 struct snd_soc_codec *snd_soc_dapm_kcontrol_codec(struct snd_kcontrol *kcontrol)
354 {
355 return dapm_kcontrol_get_wlist(kcontrol)->widgets[0]->codec;
356 }
357 EXPORT_SYMBOL_GPL(snd_soc_dapm_kcontrol_codec);
358
359 static void dapm_reset(struct snd_soc_card *card)
360 {
361 struct snd_soc_dapm_widget *w;
362
363 memset(&card->dapm_stats, 0, sizeof(card->dapm_stats));
364
365 list_for_each_entry(w, &card->widgets, list) {
366 w->new_power = w->power;
367 w->power_checked = false;
368 w->inputs = -1;
369 w->outputs = -1;
370 }
371 }
372
373 static int soc_widget_read(struct snd_soc_dapm_widget *w, int reg,
374 unsigned int *value)
375 {
376 if (w->codec) {
377 *value = snd_soc_read(w->codec, reg);
378 return 0;
379 } else if (w->platform) {
380 *value = snd_soc_platform_read(w->platform, reg);
381 return 0;
382 }
383
384 dev_err(w->dapm->dev, "ASoC: no valid widget read method\n");
385 return -1;
386 }
387
388 static int soc_widget_write(struct snd_soc_dapm_widget *w, int reg,
389 unsigned 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 unsigned 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 unsigned 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 unsigned 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 card bias changes at first */
1901 dapm_pre_sequence_async(&card->dapm, 0);
1902 /* Run other bias changes in parallel */
1903 list_for_each_entry(d, &card->dapm_list, list) {
1904 if (d != &card->dapm)
1905 async_schedule_domain(dapm_pre_sequence_async, d,
1906 &async_domain);
1907 }
1908 async_synchronize_full_domain(&async_domain);
1909
1910 list_for_each_entry(w, &down_list, power_list) {
1911 dapm_seq_check_event(card, w, SND_SOC_DAPM_WILL_PMD);
1912 }
1913
1914 list_for_each_entry(w, &up_list, power_list) {
1915 dapm_seq_check_event(card, w, SND_SOC_DAPM_WILL_PMU);
1916 }
1917
1918 /* Power down widgets first; try to avoid amplifying pops. */
1919 dapm_seq_run(card, &down_list, event, false);
1920
1921 dapm_widget_update(card);
1922
1923 /* Now power up. */
1924 dapm_seq_run(card, &up_list, event, true);
1925
1926 /* Run all the bias changes in parallel */
1927 list_for_each_entry(d, &card->dapm_list, list) {
1928 if (d != &card->dapm)
1929 async_schedule_domain(dapm_post_sequence_async, d,
1930 &async_domain);
1931 }
1932 async_synchronize_full_domain(&async_domain);
1933 /* Run card bias changes at last */
1934 dapm_post_sequence_async(&card->dapm, 0);
1935
1936 /* do we need to notify any clients that DAPM event is complete */
1937 list_for_each_entry(d, &card->dapm_list, list) {
1938 if (d->stream_event)
1939 d->stream_event(d, event);
1940 }
1941
1942 pop_dbg(card->dev, card->pop_time,
1943 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
1944 pop_wait(card->pop_time);
1945
1946 trace_snd_soc_dapm_done(card);
1947
1948 return 0;
1949 }
1950
1951 #ifdef CONFIG_DEBUG_FS
1952 static ssize_t dapm_widget_power_read_file(struct file *file,
1953 char __user *user_buf,
1954 size_t count, loff_t *ppos)
1955 {
1956 struct snd_soc_dapm_widget *w = file->private_data;
1957 char *buf;
1958 int in, out;
1959 ssize_t ret;
1960 struct snd_soc_dapm_path *p = NULL;
1961
1962 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1963 if (!buf)
1964 return -ENOMEM;
1965
1966 in = is_connected_input_ep(w, NULL);
1967 dapm_clear_walk_input(w->dapm, &w->sources);
1968 out = is_connected_output_ep(w, NULL);
1969 dapm_clear_walk_output(w->dapm, &w->sinks);
1970
1971 ret = snprintf(buf, PAGE_SIZE, "%s: %s%s in %d out %d",
1972 w->name, w->power ? "On" : "Off",
1973 w->force ? " (forced)" : "", in, out);
1974
1975 if (w->reg >= 0)
1976 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1977 " - R%d(0x%x) mask 0x%x",
1978 w->reg, w->reg, w->mask << w->shift);
1979
1980 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1981
1982 if (w->sname)
1983 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1984 w->sname,
1985 w->active ? "active" : "inactive");
1986
1987 list_for_each_entry(p, &w->sources, list_sink) {
1988 if (p->connected && !p->connected(w, p->source))
1989 continue;
1990
1991 if (p->connect)
1992 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1993 " in \"%s\" \"%s\"\n",
1994 p->name ? p->name : "static",
1995 p->source->name);
1996 }
1997 list_for_each_entry(p, &w->sinks, list_source) {
1998 if (p->connected && !p->connected(w, p->sink))
1999 continue;
2000
2001 if (p->connect)
2002 ret += snprintf(buf + ret, PAGE_SIZE - ret,
2003 " out \"%s\" \"%s\"\n",
2004 p->name ? p->name : "static",
2005 p->sink->name);
2006 }
2007
2008 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
2009
2010 kfree(buf);
2011 return ret;
2012 }
2013
2014 static const struct file_operations dapm_widget_power_fops = {
2015 .open = simple_open,
2016 .read = dapm_widget_power_read_file,
2017 .llseek = default_llseek,
2018 };
2019
2020 static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
2021 size_t count, loff_t *ppos)
2022 {
2023 struct snd_soc_dapm_context *dapm = file->private_data;
2024 char *level;
2025
2026 switch (dapm->bias_level) {
2027 case SND_SOC_BIAS_ON:
2028 level = "On\n";
2029 break;
2030 case SND_SOC_BIAS_PREPARE:
2031 level = "Prepare\n";
2032 break;
2033 case SND_SOC_BIAS_STANDBY:
2034 level = "Standby\n";
2035 break;
2036 case SND_SOC_BIAS_OFF:
2037 level = "Off\n";
2038 break;
2039 default:
2040 WARN(1, "Unknown bias_level %d\n", dapm->bias_level);
2041 level = "Unknown\n";
2042 break;
2043 }
2044
2045 return simple_read_from_buffer(user_buf, count, ppos, level,
2046 strlen(level));
2047 }
2048
2049 static const struct file_operations dapm_bias_fops = {
2050 .open = simple_open,
2051 .read = dapm_bias_read_file,
2052 .llseek = default_llseek,
2053 };
2054
2055 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
2056 struct dentry *parent)
2057 {
2058 struct dentry *d;
2059
2060 dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
2061
2062 if (!dapm->debugfs_dapm) {
2063 dev_warn(dapm->dev,
2064 "ASoC: Failed to create DAPM debugfs directory\n");
2065 return;
2066 }
2067
2068 d = debugfs_create_file("bias_level", 0444,
2069 dapm->debugfs_dapm, dapm,
2070 &dapm_bias_fops);
2071 if (!d)
2072 dev_warn(dapm->dev,
2073 "ASoC: Failed to create bias level debugfs file\n");
2074 }
2075
2076 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
2077 {
2078 struct snd_soc_dapm_context *dapm = w->dapm;
2079 struct dentry *d;
2080
2081 if (!dapm->debugfs_dapm || !w->name)
2082 return;
2083
2084 d = debugfs_create_file(w->name, 0444,
2085 dapm->debugfs_dapm, w,
2086 &dapm_widget_power_fops);
2087 if (!d)
2088 dev_warn(w->dapm->dev,
2089 "ASoC: Failed to create %s debugfs file\n",
2090 w->name);
2091 }
2092
2093 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
2094 {
2095 debugfs_remove_recursive(dapm->debugfs_dapm);
2096 }
2097
2098 #else
2099 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
2100 struct dentry *parent)
2101 {
2102 }
2103
2104 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
2105 {
2106 }
2107
2108 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
2109 {
2110 }
2111
2112 #endif
2113
2114 /* test and update the power status of a mux widget */
2115 static int soc_dapm_mux_update_power(struct snd_soc_card *card,
2116 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e)
2117 {
2118 struct snd_soc_dapm_path *path;
2119 int found = 0;
2120
2121 /* find dapm widget path assoc with kcontrol */
2122 dapm_kcontrol_for_each_path(path, kcontrol) {
2123 if (!path->name || !e->texts[mux])
2124 continue;
2125
2126 found = 1;
2127 /* we now need to match the string in the enum to the path */
2128 if (!(strcmp(path->name, e->texts[mux]))) {
2129 path->connect = 1; /* new connection */
2130 dapm_mark_dirty(path->source, "mux connection");
2131 } else {
2132 if (path->connect)
2133 dapm_mark_dirty(path->source,
2134 "mux disconnection");
2135 path->connect = 0; /* old connection must be powered down */
2136 }
2137 dapm_mark_dirty(path->sink, "mux change");
2138 }
2139
2140 if (found)
2141 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2142
2143 return found;
2144 }
2145
2146 int snd_soc_dapm_mux_update_power(struct snd_soc_dapm_context *dapm,
2147 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e,
2148 struct snd_soc_dapm_update *update)
2149 {
2150 struct snd_soc_card *card = dapm->card;
2151 int ret;
2152
2153 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2154 card->update = update;
2155 ret = soc_dapm_mux_update_power(card, kcontrol, mux, e);
2156 card->update = NULL;
2157 mutex_unlock(&card->dapm_mutex);
2158 if (ret > 0)
2159 soc_dpcm_runtime_update(card);
2160 return ret;
2161 }
2162 EXPORT_SYMBOL_GPL(snd_soc_dapm_mux_update_power);
2163
2164 /* test and update the power status of a mixer or switch widget */
2165 static int soc_dapm_mixer_update_power(struct snd_soc_card *card,
2166 struct snd_kcontrol *kcontrol, int connect)
2167 {
2168 struct snd_soc_dapm_path *path;
2169 int found = 0;
2170
2171 /* find dapm widget path assoc with kcontrol */
2172 dapm_kcontrol_for_each_path(path, kcontrol) {
2173 found = 1;
2174 path->connect = connect;
2175 dapm_mark_dirty(path->source, "mixer connection");
2176 dapm_mark_dirty(path->sink, "mixer update");
2177 }
2178
2179 if (found)
2180 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2181
2182 return found;
2183 }
2184
2185 int snd_soc_dapm_mixer_update_power(struct snd_soc_dapm_context *dapm,
2186 struct snd_kcontrol *kcontrol, int connect,
2187 struct snd_soc_dapm_update *update)
2188 {
2189 struct snd_soc_card *card = dapm->card;
2190 int ret;
2191
2192 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2193 card->update = update;
2194 ret = soc_dapm_mixer_update_power(card, kcontrol, connect);
2195 card->update = NULL;
2196 mutex_unlock(&card->dapm_mutex);
2197 if (ret > 0)
2198 soc_dpcm_runtime_update(card);
2199 return ret;
2200 }
2201 EXPORT_SYMBOL_GPL(snd_soc_dapm_mixer_update_power);
2202
2203 /* show dapm widget status in sys fs */
2204 static ssize_t dapm_widget_show(struct device *dev,
2205 struct device_attribute *attr, char *buf)
2206 {
2207 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
2208 struct snd_soc_codec *codec =rtd->codec;
2209 struct snd_soc_dapm_widget *w;
2210 int count = 0;
2211 char *state = "not set";
2212
2213 list_for_each_entry(w, &codec->card->widgets, list) {
2214 if (w->dapm != &codec->dapm)
2215 continue;
2216
2217 /* only display widgets that burnm power */
2218 switch (w->id) {
2219 case snd_soc_dapm_hp:
2220 case snd_soc_dapm_mic:
2221 case snd_soc_dapm_spk:
2222 case snd_soc_dapm_line:
2223 case snd_soc_dapm_micbias:
2224 case snd_soc_dapm_dac:
2225 case snd_soc_dapm_adc:
2226 case snd_soc_dapm_pga:
2227 case snd_soc_dapm_out_drv:
2228 case snd_soc_dapm_mixer:
2229 case snd_soc_dapm_mixer_named_ctl:
2230 case snd_soc_dapm_supply:
2231 case snd_soc_dapm_regulator_supply:
2232 case snd_soc_dapm_clock_supply:
2233 if (w->name)
2234 count += sprintf(buf + count, "%s: %s\n",
2235 w->name, w->power ? "On":"Off");
2236 break;
2237 default:
2238 break;
2239 }
2240 }
2241
2242 switch (codec->dapm.bias_level) {
2243 case SND_SOC_BIAS_ON:
2244 state = "On";
2245 break;
2246 case SND_SOC_BIAS_PREPARE:
2247 state = "Prepare";
2248 break;
2249 case SND_SOC_BIAS_STANDBY:
2250 state = "Standby";
2251 break;
2252 case SND_SOC_BIAS_OFF:
2253 state = "Off";
2254 break;
2255 }
2256 count += sprintf(buf + count, "PM State: %s\n", state);
2257
2258 return count;
2259 }
2260
2261 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
2262
2263 int snd_soc_dapm_sys_add(struct device *dev)
2264 {
2265 return device_create_file(dev, &dev_attr_dapm_widget);
2266 }
2267
2268 static void snd_soc_dapm_sys_remove(struct device *dev)
2269 {
2270 device_remove_file(dev, &dev_attr_dapm_widget);
2271 }
2272
2273 static void dapm_free_path(struct snd_soc_dapm_path *path)
2274 {
2275 list_del(&path->list_sink);
2276 list_del(&path->list_source);
2277 list_del(&path->list_kcontrol);
2278 list_del(&path->list);
2279 kfree(path);
2280 }
2281
2282 /* free all dapm widgets and resources */
2283 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
2284 {
2285 struct snd_soc_dapm_widget *w, *next_w;
2286 struct snd_soc_dapm_path *p, *next_p;
2287
2288 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
2289 if (w->dapm != dapm)
2290 continue;
2291 list_del(&w->list);
2292 /*
2293 * remove source and sink paths associated to this widget.
2294 * While removing the path, remove reference to it from both
2295 * source and sink widgets so that path is removed only once.
2296 */
2297 list_for_each_entry_safe(p, next_p, &w->sources, list_sink)
2298 dapm_free_path(p);
2299
2300 list_for_each_entry_safe(p, next_p, &w->sinks, list_source)
2301 dapm_free_path(p);
2302
2303 kfree(w->kcontrols);
2304 kfree(w->name);
2305 kfree(w);
2306 }
2307 }
2308
2309 static struct snd_soc_dapm_widget *dapm_find_widget(
2310 struct snd_soc_dapm_context *dapm, const char *pin,
2311 bool search_other_contexts)
2312 {
2313 struct snd_soc_dapm_widget *w;
2314 struct snd_soc_dapm_widget *fallback = NULL;
2315
2316 list_for_each_entry(w, &dapm->card->widgets, list) {
2317 if (!strcmp(w->name, pin)) {
2318 if (w->dapm == dapm)
2319 return w;
2320 else
2321 fallback = w;
2322 }
2323 }
2324
2325 if (search_other_contexts)
2326 return fallback;
2327
2328 return NULL;
2329 }
2330
2331 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
2332 const char *pin, int status)
2333 {
2334 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2335
2336 if (!w) {
2337 dev_err(dapm->dev, "ASoC: DAPM unknown pin %s\n", pin);
2338 return -EINVAL;
2339 }
2340
2341 if (w->connected != status)
2342 dapm_mark_dirty(w, "pin configuration");
2343
2344 w->connected = status;
2345 if (status == 0)
2346 w->force = 0;
2347
2348 return 0;
2349 }
2350
2351 /**
2352 * snd_soc_dapm_sync_unlocked - scan and power dapm paths
2353 * @dapm: DAPM context
2354 *
2355 * Walks all dapm audio paths and powers widgets according to their
2356 * stream or path usage.
2357 *
2358 * Requires external locking.
2359 *
2360 * Returns 0 for success.
2361 */
2362 int snd_soc_dapm_sync_unlocked(struct snd_soc_dapm_context *dapm)
2363 {
2364 /*
2365 * Suppress early reports (eg, jacks syncing their state) to avoid
2366 * silly DAPM runs during card startup.
2367 */
2368 if (!dapm->card || !dapm->card->instantiated)
2369 return 0;
2370
2371 return dapm_power_widgets(dapm->card, SND_SOC_DAPM_STREAM_NOP);
2372 }
2373 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync_unlocked);
2374
2375 /**
2376 * snd_soc_dapm_sync - scan and power dapm paths
2377 * @dapm: DAPM context
2378 *
2379 * Walks all dapm audio paths and powers widgets according to their
2380 * stream or path usage.
2381 *
2382 * Returns 0 for success.
2383 */
2384 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
2385 {
2386 int ret;
2387
2388 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2389 ret = snd_soc_dapm_sync_unlocked(dapm);
2390 mutex_unlock(&dapm->card->dapm_mutex);
2391 return ret;
2392 }
2393 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
2394
2395 static int snd_soc_dapm_add_path(struct snd_soc_dapm_context *dapm,
2396 struct snd_soc_dapm_widget *wsource, struct snd_soc_dapm_widget *wsink,
2397 const char *control,
2398 int (*connected)(struct snd_soc_dapm_widget *source,
2399 struct snd_soc_dapm_widget *sink))
2400 {
2401 struct snd_soc_dapm_path *path;
2402 int ret;
2403
2404 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
2405 if (!path)
2406 return -ENOMEM;
2407
2408 path->source = wsource;
2409 path->sink = wsink;
2410 path->connected = connected;
2411 INIT_LIST_HEAD(&path->list);
2412 INIT_LIST_HEAD(&path->list_kcontrol);
2413 INIT_LIST_HEAD(&path->list_source);
2414 INIT_LIST_HEAD(&path->list_sink);
2415
2416 /* check for external widgets */
2417 if (wsink->id == snd_soc_dapm_input) {
2418 if (wsource->id == snd_soc_dapm_micbias ||
2419 wsource->id == snd_soc_dapm_mic ||
2420 wsource->id == snd_soc_dapm_line ||
2421 wsource->id == snd_soc_dapm_output)
2422 wsink->ext = 1;
2423 }
2424 if (wsource->id == snd_soc_dapm_output) {
2425 if (wsink->id == snd_soc_dapm_spk ||
2426 wsink->id == snd_soc_dapm_hp ||
2427 wsink->id == snd_soc_dapm_line ||
2428 wsink->id == snd_soc_dapm_input)
2429 wsource->ext = 1;
2430 }
2431
2432 dapm_mark_dirty(wsource, "Route added");
2433 dapm_mark_dirty(wsink, "Route added");
2434
2435 /* connect static paths */
2436 if (control == NULL) {
2437 list_add(&path->list, &dapm->card->paths);
2438 list_add(&path->list_sink, &wsink->sources);
2439 list_add(&path->list_source, &wsource->sinks);
2440 path->connect = 1;
2441 return 0;
2442 }
2443
2444 /* connect dynamic paths */
2445 switch (wsink->id) {
2446 case snd_soc_dapm_adc:
2447 case snd_soc_dapm_dac:
2448 case snd_soc_dapm_pga:
2449 case snd_soc_dapm_out_drv:
2450 case snd_soc_dapm_input:
2451 case snd_soc_dapm_output:
2452 case snd_soc_dapm_siggen:
2453 case snd_soc_dapm_micbias:
2454 case snd_soc_dapm_vmid:
2455 case snd_soc_dapm_pre:
2456 case snd_soc_dapm_post:
2457 case snd_soc_dapm_supply:
2458 case snd_soc_dapm_regulator_supply:
2459 case snd_soc_dapm_clock_supply:
2460 case snd_soc_dapm_aif_in:
2461 case snd_soc_dapm_aif_out:
2462 case snd_soc_dapm_dai_in:
2463 case snd_soc_dapm_dai_out:
2464 case snd_soc_dapm_dai_link:
2465 case snd_soc_dapm_kcontrol:
2466 list_add(&path->list, &dapm->card->paths);
2467 list_add(&path->list_sink, &wsink->sources);
2468 list_add(&path->list_source, &wsource->sinks);
2469 path->connect = 1;
2470 return 0;
2471 case snd_soc_dapm_mux:
2472 case snd_soc_dapm_virt_mux:
2473 case snd_soc_dapm_value_mux:
2474 ret = dapm_connect_mux(dapm, wsource, wsink, path, control,
2475 &wsink->kcontrol_news[0]);
2476 if (ret != 0)
2477 goto err;
2478 break;
2479 case snd_soc_dapm_switch:
2480 case snd_soc_dapm_mixer:
2481 case snd_soc_dapm_mixer_named_ctl:
2482 ret = dapm_connect_mixer(dapm, wsource, wsink, path, control);
2483 if (ret != 0)
2484 goto err;
2485 break;
2486 case snd_soc_dapm_hp:
2487 case snd_soc_dapm_mic:
2488 case snd_soc_dapm_line:
2489 case snd_soc_dapm_spk:
2490 list_add(&path->list, &dapm->card->paths);
2491 list_add(&path->list_sink, &wsink->sources);
2492 list_add(&path->list_source, &wsource->sinks);
2493 path->connect = 0;
2494 return 0;
2495 }
2496
2497 return 0;
2498 err:
2499 kfree(path);
2500 return ret;
2501 }
2502
2503 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
2504 const struct snd_soc_dapm_route *route,
2505 unsigned int is_prefixed)
2506 {
2507 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
2508 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
2509 const char *sink;
2510 const char *source;
2511 char prefixed_sink[80];
2512 char prefixed_source[80];
2513 int ret;
2514
2515 if (dapm->codec && dapm->codec->name_prefix && !is_prefixed) {
2516 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
2517 dapm->codec->name_prefix, route->sink);
2518 sink = prefixed_sink;
2519 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
2520 dapm->codec->name_prefix, route->source);
2521 source = prefixed_source;
2522 } else {
2523 sink = route->sink;
2524 source = route->source;
2525 }
2526
2527 /*
2528 * find src and dest widgets over all widgets but favor a widget from
2529 * current DAPM context
2530 */
2531 list_for_each_entry(w, &dapm->card->widgets, list) {
2532 if (!wsink && !(strcmp(w->name, sink))) {
2533 wtsink = w;
2534 if (w->dapm == dapm)
2535 wsink = w;
2536 continue;
2537 }
2538 if (!wsource && !(strcmp(w->name, source))) {
2539 wtsource = w;
2540 if (w->dapm == dapm)
2541 wsource = w;
2542 }
2543 }
2544 /* use widget from another DAPM context if not found from this */
2545 if (!wsink)
2546 wsink = wtsink;
2547 if (!wsource)
2548 wsource = wtsource;
2549
2550 if (wsource == NULL) {
2551 dev_err(dapm->dev, "ASoC: no source widget found for %s\n",
2552 route->source);
2553 return -ENODEV;
2554 }
2555 if (wsink == NULL) {
2556 dev_err(dapm->dev, "ASoC: no sink widget found for %s\n",
2557 route->sink);
2558 return -ENODEV;
2559 }
2560
2561 ret = snd_soc_dapm_add_path(dapm, wsource, wsink, route->control,
2562 route->connected);
2563 if (ret)
2564 goto err;
2565
2566 return 0;
2567 err:
2568 dev_warn(dapm->dev, "ASoC: no dapm match for %s --> %s --> %s\n",
2569 source, route->control, sink);
2570 return ret;
2571 }
2572
2573 static int snd_soc_dapm_del_route(struct snd_soc_dapm_context *dapm,
2574 const struct snd_soc_dapm_route *route)
2575 {
2576 struct snd_soc_dapm_path *path, *p;
2577 const char *sink;
2578 const char *source;
2579 char prefixed_sink[80];
2580 char prefixed_source[80];
2581
2582 if (route->control) {
2583 dev_err(dapm->dev,
2584 "ASoC: Removal of routes with controls not supported\n");
2585 return -EINVAL;
2586 }
2587
2588 if (dapm->codec && dapm->codec->name_prefix) {
2589 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
2590 dapm->codec->name_prefix, route->sink);
2591 sink = prefixed_sink;
2592 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
2593 dapm->codec->name_prefix, route->source);
2594 source = prefixed_source;
2595 } else {
2596 sink = route->sink;
2597 source = route->source;
2598 }
2599
2600 path = NULL;
2601 list_for_each_entry(p, &dapm->card->paths, list) {
2602 if (strcmp(p->source->name, source) != 0)
2603 continue;
2604 if (strcmp(p->sink->name, sink) != 0)
2605 continue;
2606 path = p;
2607 break;
2608 }
2609
2610 if (path) {
2611 dapm_mark_dirty(path->source, "Route removed");
2612 dapm_mark_dirty(path->sink, "Route removed");
2613
2614 dapm_free_path(path);
2615 } else {
2616 dev_warn(dapm->dev, "ASoC: Route %s->%s does not exist\n",
2617 source, sink);
2618 }
2619
2620 return 0;
2621 }
2622
2623 /**
2624 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
2625 * @dapm: DAPM context
2626 * @route: audio routes
2627 * @num: number of routes
2628 *
2629 * Connects 2 dapm widgets together via a named audio path. The sink is
2630 * the widget receiving the audio signal, whilst the source is the sender
2631 * of the audio signal.
2632 *
2633 * Returns 0 for success else error. On error all resources can be freed
2634 * with a call to snd_soc_card_free().
2635 */
2636 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
2637 const struct snd_soc_dapm_route *route, int num)
2638 {
2639 int i, r, ret = 0;
2640
2641 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2642 for (i = 0; i < num; i++) {
2643 r = snd_soc_dapm_add_route(dapm, route, false);
2644 if (r < 0) {
2645 dev_err(dapm->dev, "ASoC: Failed to add route %s -> %s -> %s\n",
2646 route->source,
2647 route->control ? route->control : "direct",
2648 route->sink);
2649 ret = r;
2650 }
2651 route++;
2652 }
2653 mutex_unlock(&dapm->card->dapm_mutex);
2654
2655 return ret;
2656 }
2657 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
2658
2659 /**
2660 * snd_soc_dapm_del_routes - Remove routes between DAPM widgets
2661 * @dapm: DAPM context
2662 * @route: audio routes
2663 * @num: number of routes
2664 *
2665 * Removes routes from the DAPM context.
2666 */
2667 int snd_soc_dapm_del_routes(struct snd_soc_dapm_context *dapm,
2668 const struct snd_soc_dapm_route *route, int num)
2669 {
2670 int i, ret = 0;
2671
2672 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2673 for (i = 0; i < num; i++) {
2674 snd_soc_dapm_del_route(dapm, route);
2675 route++;
2676 }
2677 mutex_unlock(&dapm->card->dapm_mutex);
2678
2679 return ret;
2680 }
2681 EXPORT_SYMBOL_GPL(snd_soc_dapm_del_routes);
2682
2683 static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm,
2684 const struct snd_soc_dapm_route *route)
2685 {
2686 struct snd_soc_dapm_widget *source = dapm_find_widget(dapm,
2687 route->source,
2688 true);
2689 struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm,
2690 route->sink,
2691 true);
2692 struct snd_soc_dapm_path *path;
2693 int count = 0;
2694
2695 if (!source) {
2696 dev_err(dapm->dev, "ASoC: Unable to find source %s for weak route\n",
2697 route->source);
2698 return -ENODEV;
2699 }
2700
2701 if (!sink) {
2702 dev_err(dapm->dev, "ASoC: Unable to find sink %s for weak route\n",
2703 route->sink);
2704 return -ENODEV;
2705 }
2706
2707 if (route->control || route->connected)
2708 dev_warn(dapm->dev, "ASoC: Ignoring control for weak route %s->%s\n",
2709 route->source, route->sink);
2710
2711 list_for_each_entry(path, &source->sinks, list_source) {
2712 if (path->sink == sink) {
2713 path->weak = 1;
2714 count++;
2715 }
2716 }
2717
2718 if (count == 0)
2719 dev_err(dapm->dev, "ASoC: No path found for weak route %s->%s\n",
2720 route->source, route->sink);
2721 if (count > 1)
2722 dev_warn(dapm->dev, "ASoC: %d paths found for weak route %s->%s\n",
2723 count, route->source, route->sink);
2724
2725 return 0;
2726 }
2727
2728 /**
2729 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
2730 * @dapm: DAPM context
2731 * @route: audio routes
2732 * @num: number of routes
2733 *
2734 * Mark existing routes matching those specified in the passed array
2735 * as being weak, meaning that they are ignored for the purpose of
2736 * power decisions. The main intended use case is for sidetone paths
2737 * which couple audio between other independent paths if they are both
2738 * active in order to make the combination work better at the user
2739 * level but which aren't intended to be "used".
2740 *
2741 * Note that CODEC drivers should not use this as sidetone type paths
2742 * can frequently also be used as bypass paths.
2743 */
2744 int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm,
2745 const struct snd_soc_dapm_route *route, int num)
2746 {
2747 int i, err;
2748 int ret = 0;
2749
2750 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2751 for (i = 0; i < num; i++) {
2752 err = snd_soc_dapm_weak_route(dapm, route);
2753 if (err)
2754 ret = err;
2755 route++;
2756 }
2757 mutex_unlock(&dapm->card->dapm_mutex);
2758
2759 return ret;
2760 }
2761 EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes);
2762
2763 /**
2764 * snd_soc_dapm_new_widgets - add new dapm widgets
2765 * @dapm: DAPM context
2766 *
2767 * Checks the codec for any new dapm widgets and creates them if found.
2768 *
2769 * Returns 0 for success.
2770 */
2771 int snd_soc_dapm_new_widgets(struct snd_soc_card *card)
2772 {
2773 struct snd_soc_dapm_widget *w;
2774 unsigned int val;
2775
2776 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2777
2778 list_for_each_entry(w, &card->widgets, list)
2779 {
2780 if (w->new)
2781 continue;
2782
2783 if (w->num_kcontrols) {
2784 w->kcontrols = kzalloc(w->num_kcontrols *
2785 sizeof(struct snd_kcontrol *),
2786 GFP_KERNEL);
2787 if (!w->kcontrols) {
2788 mutex_unlock(&card->dapm_mutex);
2789 return -ENOMEM;
2790 }
2791 }
2792
2793 switch(w->id) {
2794 case snd_soc_dapm_switch:
2795 case snd_soc_dapm_mixer:
2796 case snd_soc_dapm_mixer_named_ctl:
2797 dapm_new_mixer(w);
2798 break;
2799 case snd_soc_dapm_mux:
2800 case snd_soc_dapm_virt_mux:
2801 case snd_soc_dapm_value_mux:
2802 dapm_new_mux(w);
2803 break;
2804 case snd_soc_dapm_pga:
2805 case snd_soc_dapm_out_drv:
2806 dapm_new_pga(w);
2807 break;
2808 default:
2809 break;
2810 }
2811
2812 /* Read the initial power state from the device */
2813 if (w->reg >= 0) {
2814 soc_widget_read(w, w->reg, &val);
2815 val = val >> w->shift;
2816 val &= w->mask;
2817 if (val == w->on_val)
2818 w->power = 1;
2819 }
2820
2821 w->new = 1;
2822
2823 dapm_mark_dirty(w, "new widget");
2824 dapm_debugfs_add_widget(w);
2825 }
2826
2827 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2828 mutex_unlock(&card->dapm_mutex);
2829 return 0;
2830 }
2831 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
2832
2833 /**
2834 * snd_soc_dapm_get_volsw - dapm mixer get callback
2835 * @kcontrol: mixer control
2836 * @ucontrol: control element information
2837 *
2838 * Callback to get the value of a dapm mixer control.
2839 *
2840 * Returns 0 for success.
2841 */
2842 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
2843 struct snd_ctl_elem_value *ucontrol)
2844 {
2845 struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
2846 struct snd_soc_card *card = codec->card;
2847 struct soc_mixer_control *mc =
2848 (struct soc_mixer_control *)kcontrol->private_value;
2849 int reg = mc->reg;
2850 unsigned int shift = mc->shift;
2851 int max = mc->max;
2852 unsigned int mask = (1 << fls(max)) - 1;
2853 unsigned int invert = mc->invert;
2854 unsigned int val;
2855
2856 if (snd_soc_volsw_is_stereo(mc))
2857 dev_warn(codec->dapm.dev,
2858 "ASoC: Control '%s' is stereo, which is not supported\n",
2859 kcontrol->id.name);
2860
2861 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2862 if (dapm_kcontrol_is_powered(kcontrol) && reg != SND_SOC_NOPM)
2863 val = (snd_soc_read(codec, reg) >> shift) & mask;
2864 else
2865 val = dapm_kcontrol_get_value(kcontrol);
2866 mutex_unlock(&card->dapm_mutex);
2867
2868 if (invert)
2869 ucontrol->value.integer.value[0] = max - val;
2870 else
2871 ucontrol->value.integer.value[0] = val;
2872
2873 return 0;
2874 }
2875 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
2876
2877 /**
2878 * snd_soc_dapm_put_volsw - dapm mixer set callback
2879 * @kcontrol: mixer control
2880 * @ucontrol: control element information
2881 *
2882 * Callback to set the value of a dapm mixer control.
2883 *
2884 * Returns 0 for success.
2885 */
2886 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
2887 struct snd_ctl_elem_value *ucontrol)
2888 {
2889 struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
2890 struct snd_soc_card *card = codec->card;
2891 struct soc_mixer_control *mc =
2892 (struct soc_mixer_control *)kcontrol->private_value;
2893 int reg = mc->reg;
2894 unsigned int shift = mc->shift;
2895 int max = mc->max;
2896 unsigned int mask = (1 << fls(max)) - 1;
2897 unsigned int invert = mc->invert;
2898 unsigned int val;
2899 int connect, change;
2900 struct snd_soc_dapm_update update;
2901 int ret = 0;
2902
2903 if (snd_soc_volsw_is_stereo(mc))
2904 dev_warn(codec->dapm.dev,
2905 "ASoC: Control '%s' is stereo, which is not supported\n",
2906 kcontrol->id.name);
2907
2908 val = (ucontrol->value.integer.value[0] & mask);
2909 connect = !!val;
2910
2911 if (invert)
2912 val = max - val;
2913
2914 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2915
2916 change = dapm_kcontrol_set_value(kcontrol, val);
2917
2918 if (reg != SND_SOC_NOPM) {
2919 mask = mask << shift;
2920 val = val << shift;
2921
2922 change = snd_soc_test_bits(codec, reg, mask, val);
2923 }
2924
2925 if (change) {
2926 if (reg != SND_SOC_NOPM) {
2927 update.kcontrol = kcontrol;
2928 update.reg = reg;
2929 update.mask = mask;
2930 update.val = val;
2931
2932 card->update = &update;
2933 }
2934
2935 ret = soc_dapm_mixer_update_power(card, kcontrol, connect);
2936
2937 card->update = NULL;
2938 }
2939
2940 mutex_unlock(&card->dapm_mutex);
2941
2942 if (ret > 0)
2943 soc_dpcm_runtime_update(card);
2944
2945 return change;
2946 }
2947 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
2948
2949 /**
2950 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
2951 * @kcontrol: mixer control
2952 * @ucontrol: control element information
2953 *
2954 * Callback to get the value of a dapm enumerated double mixer control.
2955 *
2956 * Returns 0 for success.
2957 */
2958 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
2959 struct snd_ctl_elem_value *ucontrol)
2960 {
2961 struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
2962 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2963 unsigned int val;
2964
2965 val = snd_soc_read(codec, e->reg);
2966 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & e->mask;
2967 if (e->shift_l != e->shift_r)
2968 ucontrol->value.enumerated.item[1] =
2969 (val >> e->shift_r) & e->mask;
2970
2971 return 0;
2972 }
2973 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
2974
2975 /**
2976 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
2977 * @kcontrol: mixer control
2978 * @ucontrol: control element information
2979 *
2980 * Callback to set the value of a dapm enumerated double mixer control.
2981 *
2982 * Returns 0 for success.
2983 */
2984 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
2985 struct snd_ctl_elem_value *ucontrol)
2986 {
2987 struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
2988 struct snd_soc_card *card = codec->card;
2989 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2990 unsigned int val, mux, change;
2991 unsigned int mask;
2992 struct snd_soc_dapm_update update;
2993 int ret = 0;
2994
2995 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2996 return -EINVAL;
2997 mux = ucontrol->value.enumerated.item[0];
2998 val = mux << e->shift_l;
2999 mask = e->mask << e->shift_l;
3000 if (e->shift_l != e->shift_r) {
3001 if (ucontrol->value.enumerated.item[1] > e->max - 1)
3002 return -EINVAL;
3003 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
3004 mask |= e->mask << e->shift_r;
3005 }
3006
3007 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3008
3009 change = snd_soc_test_bits(codec, e->reg, mask, val);
3010 if (change) {
3011 update.kcontrol = kcontrol;
3012 update.reg = e->reg;
3013 update.mask = mask;
3014 update.val = val;
3015 card->update = &update;
3016
3017 ret = soc_dapm_mux_update_power(card, kcontrol, mux, e);
3018
3019 card->update = NULL;
3020 }
3021
3022 mutex_unlock(&card->dapm_mutex);
3023
3024 if (ret > 0)
3025 soc_dpcm_runtime_update(card);
3026
3027 return change;
3028 }
3029 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
3030
3031 /**
3032 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
3033 * @kcontrol: mixer control
3034 * @ucontrol: control element information
3035 *
3036 * Returns 0 for success.
3037 */
3038 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
3039 struct snd_ctl_elem_value *ucontrol)
3040 {
3041 ucontrol->value.enumerated.item[0] = dapm_kcontrol_get_value(kcontrol);
3042 return 0;
3043 }
3044 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt);
3045
3046 /**
3047 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
3048 * @kcontrol: mixer control
3049 * @ucontrol: control element information
3050 *
3051 * Returns 0 for success.
3052 */
3053 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
3054 struct snd_ctl_elem_value *ucontrol)
3055 {
3056 struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
3057 struct snd_soc_card *card = codec->card;
3058 unsigned int value;
3059 struct soc_enum *e =
3060 (struct soc_enum *)kcontrol->private_value;
3061 int change;
3062 int ret = 0;
3063
3064 if (ucontrol->value.enumerated.item[0] >= e->max)
3065 return -EINVAL;
3066
3067 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3068
3069 value = ucontrol->value.enumerated.item[0];
3070 change = dapm_kcontrol_set_value(kcontrol, value);
3071 if (change)
3072 ret = soc_dapm_mux_update_power(card, kcontrol, value, e);
3073
3074 mutex_unlock(&card->dapm_mutex);
3075
3076 if (ret > 0)
3077 soc_dpcm_runtime_update(card);
3078
3079 return change;
3080 }
3081 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt);
3082
3083 /**
3084 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
3085 * callback
3086 * @kcontrol: mixer control
3087 * @ucontrol: control element information
3088 *
3089 * Callback to get the value of a dapm semi enumerated double mixer control.
3090 *
3091 * Semi enumerated mixer: the enumerated items are referred as values. Can be
3092 * used for handling bitfield coded enumeration for example.
3093 *
3094 * Returns 0 for success.
3095 */
3096 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
3097 struct snd_ctl_elem_value *ucontrol)
3098 {
3099 struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
3100 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
3101 unsigned int reg_val, val, mux;
3102
3103 reg_val = snd_soc_read(codec, e->reg);
3104 val = (reg_val >> e->shift_l) & e->mask;
3105 for (mux = 0; mux < e->max; mux++) {
3106 if (val == e->values[mux])
3107 break;
3108 }
3109 ucontrol->value.enumerated.item[0] = mux;
3110 if (e->shift_l != e->shift_r) {
3111 val = (reg_val >> e->shift_r) & e->mask;
3112 for (mux = 0; mux < e->max; mux++) {
3113 if (val == e->values[mux])
3114 break;
3115 }
3116 ucontrol->value.enumerated.item[1] = mux;
3117 }
3118
3119 return 0;
3120 }
3121 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
3122
3123 /**
3124 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
3125 * callback
3126 * @kcontrol: mixer control
3127 * @ucontrol: control element information
3128 *
3129 * Callback to set the value of a dapm semi enumerated double mixer control.
3130 *
3131 * Semi enumerated mixer: the enumerated items are referred as values. Can be
3132 * used for handling bitfield coded enumeration for example.
3133 *
3134 * Returns 0 for success.
3135 */
3136 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
3137 struct snd_ctl_elem_value *ucontrol)
3138 {
3139 struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
3140 struct snd_soc_card *card = codec->card;
3141 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
3142 unsigned int val, mux, change;
3143 unsigned int mask;
3144 struct snd_soc_dapm_update update;
3145 int ret = 0;
3146
3147 if (ucontrol->value.enumerated.item[0] > e->max - 1)
3148 return -EINVAL;
3149 mux = ucontrol->value.enumerated.item[0];
3150 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
3151 mask = e->mask << e->shift_l;
3152 if (e->shift_l != e->shift_r) {
3153 if (ucontrol->value.enumerated.item[1] > e->max - 1)
3154 return -EINVAL;
3155 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
3156 mask |= e->mask << e->shift_r;
3157 }
3158
3159 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3160
3161 change = snd_soc_test_bits(codec, e->reg, mask, val);
3162 if (change) {
3163 update.kcontrol = kcontrol;
3164 update.reg = e->reg;
3165 update.mask = mask;
3166 update.val = val;
3167 card->update = &update;
3168
3169 ret = soc_dapm_mux_update_power(card, kcontrol, mux, e);
3170
3171 card->update = NULL;
3172 }
3173
3174 mutex_unlock(&card->dapm_mutex);
3175
3176 if (ret > 0)
3177 soc_dpcm_runtime_update(card);
3178
3179 return change;
3180 }
3181 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
3182
3183 /**
3184 * snd_soc_dapm_info_pin_switch - Info for a pin switch
3185 *
3186 * @kcontrol: mixer control
3187 * @uinfo: control element information
3188 *
3189 * Callback to provide information about a pin switch control.
3190 */
3191 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
3192 struct snd_ctl_elem_info *uinfo)
3193 {
3194 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
3195 uinfo->count = 1;
3196 uinfo->value.integer.min = 0;
3197 uinfo->value.integer.max = 1;
3198
3199 return 0;
3200 }
3201 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
3202
3203 /**
3204 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
3205 *
3206 * @kcontrol: mixer control
3207 * @ucontrol: Value
3208 */
3209 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
3210 struct snd_ctl_elem_value *ucontrol)
3211 {
3212 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
3213 const char *pin = (const char *)kcontrol->private_value;
3214
3215 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3216
3217 ucontrol->value.integer.value[0] =
3218 snd_soc_dapm_get_pin_status(&card->dapm, pin);
3219
3220 mutex_unlock(&card->dapm_mutex);
3221
3222 return 0;
3223 }
3224 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
3225
3226 /**
3227 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
3228 *
3229 * @kcontrol: mixer control
3230 * @ucontrol: Value
3231 */
3232 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
3233 struct snd_ctl_elem_value *ucontrol)
3234 {
3235 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
3236 const char *pin = (const char *)kcontrol->private_value;
3237
3238 if (ucontrol->value.integer.value[0])
3239 snd_soc_dapm_enable_pin(&card->dapm, pin);
3240 else
3241 snd_soc_dapm_disable_pin(&card->dapm, pin);
3242
3243 snd_soc_dapm_sync(&card->dapm);
3244 return 0;
3245 }
3246 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
3247
3248 static struct snd_soc_dapm_widget *
3249 snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
3250 const struct snd_soc_dapm_widget *widget)
3251 {
3252 struct snd_soc_dapm_widget *w;
3253 int ret;
3254
3255 if ((w = dapm_cnew_widget(widget)) == NULL)
3256 return NULL;
3257
3258 switch (w->id) {
3259 case snd_soc_dapm_regulator_supply:
3260 w->regulator = devm_regulator_get(dapm->dev, w->name);
3261 if (IS_ERR(w->regulator)) {
3262 ret = PTR_ERR(w->regulator);
3263 dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n",
3264 w->name, ret);
3265 return NULL;
3266 }
3267
3268 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
3269 ret = regulator_allow_bypass(w->regulator, true);
3270 if (ret != 0)
3271 dev_warn(w->dapm->dev,
3272 "ASoC: Failed to bypass %s: %d\n",
3273 w->name, ret);
3274 }
3275 break;
3276 case snd_soc_dapm_clock_supply:
3277 #ifdef CONFIG_CLKDEV_LOOKUP
3278 w->clk = devm_clk_get(dapm->dev, w->name);
3279 if (IS_ERR(w->clk)) {
3280 ret = PTR_ERR(w->clk);
3281 dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n",
3282 w->name, ret);
3283 return NULL;
3284 }
3285 #else
3286 return NULL;
3287 #endif
3288 break;
3289 default:
3290 break;
3291 }
3292
3293 if (dapm->codec && dapm->codec->name_prefix)
3294 w->name = kasprintf(GFP_KERNEL, "%s %s",
3295 dapm->codec->name_prefix, widget->name);
3296 else
3297 w->name = kasprintf(GFP_KERNEL, "%s", widget->name);
3298
3299 if (w->name == NULL) {
3300 kfree(w);
3301 return NULL;
3302 }
3303
3304 switch (w->id) {
3305 case snd_soc_dapm_switch:
3306 case snd_soc_dapm_mixer:
3307 case snd_soc_dapm_mixer_named_ctl:
3308 w->power_check = dapm_generic_check_power;
3309 break;
3310 case snd_soc_dapm_mux:
3311 case snd_soc_dapm_virt_mux:
3312 case snd_soc_dapm_value_mux:
3313 w->power_check = dapm_generic_check_power;
3314 break;
3315 case snd_soc_dapm_dai_out:
3316 w->power_check = dapm_adc_check_power;
3317 break;
3318 case snd_soc_dapm_dai_in:
3319 w->power_check = dapm_dac_check_power;
3320 break;
3321 case snd_soc_dapm_adc:
3322 case snd_soc_dapm_aif_out:
3323 case snd_soc_dapm_dac:
3324 case snd_soc_dapm_aif_in:
3325 case snd_soc_dapm_pga:
3326 case snd_soc_dapm_out_drv:
3327 case snd_soc_dapm_input:
3328 case snd_soc_dapm_output:
3329 case snd_soc_dapm_micbias:
3330 case snd_soc_dapm_spk:
3331 case snd_soc_dapm_hp:
3332 case snd_soc_dapm_mic:
3333 case snd_soc_dapm_line:
3334 case snd_soc_dapm_dai_link:
3335 w->power_check = dapm_generic_check_power;
3336 break;
3337 case snd_soc_dapm_supply:
3338 case snd_soc_dapm_regulator_supply:
3339 case snd_soc_dapm_clock_supply:
3340 case snd_soc_dapm_kcontrol:
3341 w->power_check = dapm_supply_check_power;
3342 break;
3343 default:
3344 w->power_check = dapm_always_on_check_power;
3345 break;
3346 }
3347
3348 w->dapm = dapm;
3349 w->codec = dapm->codec;
3350 w->platform = dapm->platform;
3351 INIT_LIST_HEAD(&w->sources);
3352 INIT_LIST_HEAD(&w->sinks);
3353 INIT_LIST_HEAD(&w->list);
3354 INIT_LIST_HEAD(&w->dirty);
3355 list_add(&w->list, &dapm->card->widgets);
3356
3357 /* machine layer set ups unconnected pins and insertions */
3358 w->connected = 1;
3359 return w;
3360 }
3361
3362 /**
3363 * snd_soc_dapm_new_controls - create new dapm controls
3364 * @dapm: DAPM context
3365 * @widget: widget array
3366 * @num: number of widgets
3367 *
3368 * Creates new DAPM controls based upon the templates.
3369 *
3370 * Returns 0 for success else error.
3371 */
3372 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
3373 const struct snd_soc_dapm_widget *widget,
3374 int num)
3375 {
3376 struct snd_soc_dapm_widget *w;
3377 int i;
3378 int ret = 0;
3379
3380 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
3381 for (i = 0; i < num; i++) {
3382 w = snd_soc_dapm_new_control(dapm, widget);
3383 if (!w) {
3384 dev_err(dapm->dev,
3385 "ASoC: Failed to create DAPM control %s\n",
3386 widget->name);
3387 ret = -ENOMEM;
3388 break;
3389 }
3390 widget++;
3391 }
3392 mutex_unlock(&dapm->card->dapm_mutex);
3393 return ret;
3394 }
3395 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
3396
3397 static int snd_soc_dai_link_event(struct snd_soc_dapm_widget *w,
3398 struct snd_kcontrol *kcontrol, int event)
3399 {
3400 struct snd_soc_dapm_path *source_p, *sink_p;
3401 struct snd_soc_dai *source, *sink;
3402 const struct snd_soc_pcm_stream *config = w->params;
3403 struct snd_pcm_substream substream;
3404 struct snd_pcm_hw_params *params = NULL;
3405 u64 fmt;
3406 int ret;
3407
3408 if (WARN_ON(!config) ||
3409 WARN_ON(list_empty(&w->sources) || list_empty(&w->sinks)))
3410 return -EINVAL;
3411
3412 /* We only support a single source and sink, pick the first */
3413 source_p = list_first_entry(&w->sources, struct snd_soc_dapm_path,
3414 list_sink);
3415 sink_p = list_first_entry(&w->sinks, struct snd_soc_dapm_path,
3416 list_source);
3417
3418 if (WARN_ON(!source_p || !sink_p) ||
3419 WARN_ON(!sink_p->source || !source_p->sink) ||
3420 WARN_ON(!source_p->source || !sink_p->sink))
3421 return -EINVAL;
3422
3423 source = source_p->source->priv;
3424 sink = sink_p->sink->priv;
3425
3426 /* Be a little careful as we don't want to overflow the mask array */
3427 if (config->formats) {
3428 fmt = ffs(config->formats) - 1;
3429 } else {
3430 dev_warn(w->dapm->dev, "ASoC: Invalid format %llx specified\n",
3431 config->formats);
3432 fmt = 0;
3433 }
3434
3435 /* Currently very limited parameter selection */
3436 params = kzalloc(sizeof(*params), GFP_KERNEL);
3437 if (!params) {
3438 ret = -ENOMEM;
3439 goto out;
3440 }
3441 snd_mask_set(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), fmt);
3442
3443 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->min =
3444 config->rate_min;
3445 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->max =
3446 config->rate_max;
3447
3448 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->min
3449 = config->channels_min;
3450 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->max
3451 = config->channels_max;
3452
3453 memset(&substream, 0, sizeof(substream));
3454
3455 switch (event) {
3456 case SND_SOC_DAPM_PRE_PMU:
3457 if (source->driver->ops && source->driver->ops->hw_params) {
3458 substream.stream = SNDRV_PCM_STREAM_CAPTURE;
3459 ret = source->driver->ops->hw_params(&substream,
3460 params, source);
3461 if (ret != 0) {
3462 dev_err(source->dev,
3463 "ASoC: hw_params() failed: %d\n", ret);
3464 goto out;
3465 }
3466 }
3467
3468 if (sink->driver->ops && sink->driver->ops->hw_params) {
3469 substream.stream = SNDRV_PCM_STREAM_PLAYBACK;
3470 ret = sink->driver->ops->hw_params(&substream, params,
3471 sink);
3472 if (ret != 0) {
3473 dev_err(sink->dev,
3474 "ASoC: hw_params() failed: %d\n", ret);
3475 goto out;
3476 }
3477 }
3478 break;
3479
3480 case SND_SOC_DAPM_POST_PMU:
3481 ret = snd_soc_dai_digital_mute(sink, 0,
3482 SNDRV_PCM_STREAM_PLAYBACK);
3483 if (ret != 0 && ret != -ENOTSUPP)
3484 dev_warn(sink->dev, "ASoC: Failed to unmute: %d\n", ret);
3485 ret = 0;
3486 break;
3487
3488 case SND_SOC_DAPM_PRE_PMD:
3489 ret = snd_soc_dai_digital_mute(sink, 1,
3490 SNDRV_PCM_STREAM_PLAYBACK);
3491 if (ret != 0 && ret != -ENOTSUPP)
3492 dev_warn(sink->dev, "ASoC: Failed to mute: %d\n", ret);
3493 ret = 0;
3494 break;
3495
3496 default:
3497 WARN(1, "Unknown event %d\n", event);
3498 return -EINVAL;
3499 }
3500
3501 out:
3502 kfree(params);
3503 return ret;
3504 }
3505
3506 int snd_soc_dapm_new_pcm(struct snd_soc_card *card,
3507 const struct snd_soc_pcm_stream *params,
3508 struct snd_soc_dapm_widget *source,
3509 struct snd_soc_dapm_widget *sink)
3510 {
3511 struct snd_soc_dapm_route routes[2];
3512 struct snd_soc_dapm_widget template;
3513 struct snd_soc_dapm_widget *w;
3514 size_t len;
3515 char *link_name;
3516
3517 len = strlen(source->name) + strlen(sink->name) + 2;
3518 link_name = devm_kzalloc(card->dev, len, GFP_KERNEL);
3519 if (!link_name)
3520 return -ENOMEM;
3521 snprintf(link_name, len, "%s-%s", source->name, sink->name);
3522
3523 memset(&template, 0, sizeof(template));
3524 template.reg = SND_SOC_NOPM;
3525 template.id = snd_soc_dapm_dai_link;
3526 template.name = link_name;
3527 template.event = snd_soc_dai_link_event;
3528 template.event_flags = SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
3529 SND_SOC_DAPM_PRE_PMD;
3530
3531 dev_dbg(card->dev, "ASoC: adding %s widget\n", link_name);
3532
3533 w = snd_soc_dapm_new_control(&card->dapm, &template);
3534 if (!w) {
3535 dev_err(card->dev, "ASoC: Failed to create %s widget\n",
3536 link_name);
3537 return -ENOMEM;
3538 }
3539
3540 w->params = params;
3541
3542 memset(&routes, 0, sizeof(routes));
3543
3544 routes[0].source = source->name;
3545 routes[0].sink = link_name;
3546 routes[1].source = link_name;
3547 routes[1].sink = sink->name;
3548
3549 return snd_soc_dapm_add_routes(&card->dapm, routes,
3550 ARRAY_SIZE(routes));
3551 }
3552
3553 int snd_soc_dapm_new_dai_widgets(struct snd_soc_dapm_context *dapm,
3554 struct snd_soc_dai *dai)
3555 {
3556 struct snd_soc_dapm_widget template;
3557 struct snd_soc_dapm_widget *w;
3558
3559 WARN_ON(dapm->dev != dai->dev);
3560
3561 memset(&template, 0, sizeof(template));
3562 template.reg = SND_SOC_NOPM;
3563
3564 if (dai->driver->playback.stream_name) {
3565 template.id = snd_soc_dapm_dai_in;
3566 template.name = dai->driver->playback.stream_name;
3567 template.sname = dai->driver->playback.stream_name;
3568
3569 dev_dbg(dai->dev, "ASoC: adding %s widget\n",
3570 template.name);
3571
3572 w = snd_soc_dapm_new_control(dapm, &template);
3573 if (!w) {
3574 dev_err(dapm->dev, "ASoC: Failed to create %s widget\n",
3575 dai->driver->playback.stream_name);
3576 return -ENOMEM;
3577 }
3578
3579 w->priv = dai;
3580 dai->playback_widget = w;
3581 }
3582
3583 if (dai->driver->capture.stream_name) {
3584 template.id = snd_soc_dapm_dai_out;
3585 template.name = dai->driver->capture.stream_name;
3586 template.sname = dai->driver->capture.stream_name;
3587
3588 dev_dbg(dai->dev, "ASoC: adding %s widget\n",
3589 template.name);
3590
3591 w = snd_soc_dapm_new_control(dapm, &template);
3592 if (!w) {
3593 dev_err(dapm->dev, "ASoC: Failed to create %s widget\n",
3594 dai->driver->capture.stream_name);
3595 return -ENOMEM;
3596 }
3597
3598 w->priv = dai;
3599 dai->capture_widget = w;
3600 }
3601
3602 return 0;
3603 }
3604
3605 int snd_soc_dapm_link_dai_widgets(struct snd_soc_card *card)
3606 {
3607 struct snd_soc_dapm_widget *dai_w, *w;
3608 struct snd_soc_dai *dai;
3609
3610 /* For each DAI widget... */
3611 list_for_each_entry(dai_w, &card->widgets, list) {
3612 switch (dai_w->id) {
3613 case snd_soc_dapm_dai_in:
3614 case snd_soc_dapm_dai_out:
3615 break;
3616 default:
3617 continue;
3618 }
3619
3620 dai = dai_w->priv;
3621
3622 /* ...find all widgets with the same stream and link them */
3623 list_for_each_entry(w, &card->widgets, list) {
3624 if (w->dapm != dai_w->dapm)
3625 continue;
3626
3627 switch (w->id) {
3628 case snd_soc_dapm_dai_in:
3629 case snd_soc_dapm_dai_out:
3630 continue;
3631 default:
3632 break;
3633 }
3634
3635 if (!w->sname || !strstr(w->sname, dai_w->name))
3636 continue;
3637
3638 if (dai->driver->playback.stream_name &&
3639 strstr(w->sname,
3640 dai->driver->playback.stream_name)) {
3641 dev_dbg(dai->dev, "%s -> %s\n",
3642 dai->playback_widget->name, w->name);
3643
3644 snd_soc_dapm_add_path(w->dapm,
3645 dai->playback_widget, w, NULL, NULL);
3646 }
3647
3648 if (dai->driver->capture.stream_name &&
3649 strstr(w->sname,
3650 dai->driver->capture.stream_name)) {
3651 dev_dbg(dai->dev, "%s -> %s\n",
3652 w->name, dai->capture_widget->name);
3653
3654 snd_soc_dapm_add_path(w->dapm, w,
3655 dai->capture_widget, NULL, NULL);
3656 }
3657 }
3658 }
3659
3660 return 0;
3661 }
3662
3663 void snd_soc_dapm_connect_dai_link_widgets(struct snd_soc_card *card)
3664 {
3665 struct snd_soc_pcm_runtime *rtd = card->rtd;
3666 struct snd_soc_dai *cpu_dai, *codec_dai;
3667 struct snd_soc_dapm_route r;
3668 int i;
3669
3670 memset(&r, 0, sizeof(r));
3671
3672 /* for each BE DAI link... */
3673 for (i = 0; i < card->num_rtd; i++) {
3674 rtd = &card->rtd[i];
3675 cpu_dai = rtd->cpu_dai;
3676 codec_dai = rtd->codec_dai;
3677
3678 /* dynamic FE links have no fixed DAI mapping */
3679 if (rtd->dai_link->dynamic)
3680 continue;
3681
3682 /* there is no point in connecting BE DAI links with dummies */
3683 if (snd_soc_dai_is_dummy(codec_dai) ||
3684 snd_soc_dai_is_dummy(cpu_dai))
3685 continue;
3686
3687 /* connect BE DAI playback if widgets are valid */
3688 if (codec_dai->playback_widget && cpu_dai->playback_widget) {
3689 r.source = cpu_dai->playback_widget->name;
3690 r.sink = codec_dai->playback_widget->name;
3691 dev_dbg(rtd->dev, "connected DAI link %s:%s -> %s:%s\n",
3692 cpu_dai->codec->name, r.source,
3693 codec_dai->platform->name, r.sink);
3694
3695 snd_soc_dapm_add_route(&card->dapm, &r, true);
3696 }
3697
3698 /* connect BE DAI capture if widgets are valid */
3699 if (codec_dai->capture_widget && cpu_dai->capture_widget) {
3700 r.source = codec_dai->capture_widget->name;
3701 r.sink = cpu_dai->capture_widget->name;
3702 dev_dbg(rtd->dev, "connected DAI link %s:%s -> %s:%s\n",
3703 codec_dai->codec->name, r.source,
3704 cpu_dai->platform->name, r.sink);
3705
3706 snd_soc_dapm_add_route(&card->dapm, &r, true);
3707 }
3708
3709 }
3710 }
3711
3712 static void soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
3713 int event)
3714 {
3715
3716 struct snd_soc_dapm_widget *w_cpu, *w_codec;
3717 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
3718 struct snd_soc_dai *codec_dai = rtd->codec_dai;
3719
3720 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
3721 w_cpu = cpu_dai->playback_widget;
3722 w_codec = codec_dai->playback_widget;
3723 } else {
3724 w_cpu = cpu_dai->capture_widget;
3725 w_codec = codec_dai->capture_widget;
3726 }
3727
3728 if (w_cpu) {
3729
3730 dapm_mark_dirty(w_cpu, "stream event");
3731
3732 switch (event) {
3733 case SND_SOC_DAPM_STREAM_START:
3734 w_cpu->active = 1;
3735 break;
3736 case SND_SOC_DAPM_STREAM_STOP:
3737 w_cpu->active = 0;
3738 break;
3739 case SND_SOC_DAPM_STREAM_SUSPEND:
3740 case SND_SOC_DAPM_STREAM_RESUME:
3741 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
3742 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
3743 break;
3744 }
3745 }
3746
3747 if (w_codec) {
3748
3749 dapm_mark_dirty(w_codec, "stream event");
3750
3751 switch (event) {
3752 case SND_SOC_DAPM_STREAM_START:
3753 w_codec->active = 1;
3754 break;
3755 case SND_SOC_DAPM_STREAM_STOP:
3756 w_codec->active = 0;
3757 break;
3758 case SND_SOC_DAPM_STREAM_SUSPEND:
3759 case SND_SOC_DAPM_STREAM_RESUME:
3760 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
3761 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
3762 break;
3763 }
3764 }
3765
3766 dapm_power_widgets(rtd->card, event);
3767 }
3768
3769 /**
3770 * snd_soc_dapm_stream_event - send a stream event to the dapm core
3771 * @rtd: PCM runtime data
3772 * @stream: stream name
3773 * @event: stream event
3774 *
3775 * Sends a stream event to the dapm core. The core then makes any
3776 * necessary widget power changes.
3777 *
3778 * Returns 0 for success else error.
3779 */
3780 void snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
3781 int event)
3782 {
3783 struct snd_soc_card *card = rtd->card;
3784
3785 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3786 soc_dapm_stream_event(rtd, stream, event);
3787 mutex_unlock(&card->dapm_mutex);
3788 }
3789
3790 /**
3791 * snd_soc_dapm_enable_pin_unlocked - enable pin.
3792 * @dapm: DAPM context
3793 * @pin: pin name
3794 *
3795 * Enables input/output pin and its parents or children widgets iff there is
3796 * a valid audio route and active audio stream.
3797 *
3798 * Requires external locking.
3799 *
3800 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3801 * do any widget power switching.
3802 */
3803 int snd_soc_dapm_enable_pin_unlocked(struct snd_soc_dapm_context *dapm,
3804 const char *pin)
3805 {
3806 return snd_soc_dapm_set_pin(dapm, pin, 1);
3807 }
3808 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin_unlocked);
3809
3810 /**
3811 * snd_soc_dapm_enable_pin - enable pin.
3812 * @dapm: DAPM context
3813 * @pin: pin name
3814 *
3815 * Enables input/output pin and its parents or children widgets iff there is
3816 * a valid audio route and active audio stream.
3817 *
3818 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3819 * do any widget power switching.
3820 */
3821 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
3822 {
3823 int ret;
3824
3825 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3826
3827 ret = snd_soc_dapm_set_pin(dapm, pin, 1);
3828
3829 mutex_unlock(&dapm->card->dapm_mutex);
3830
3831 return ret;
3832 }
3833 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
3834
3835 /**
3836 * snd_soc_dapm_force_enable_pin_unlocked - force a pin to be enabled
3837 * @dapm: DAPM context
3838 * @pin: pin name
3839 *
3840 * Enables input/output pin regardless of any other state. This is
3841 * intended for use with microphone bias supplies used in microphone
3842 * jack detection.
3843 *
3844 * Requires external locking.
3845 *
3846 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3847 * do any widget power switching.
3848 */
3849 int snd_soc_dapm_force_enable_pin_unlocked(struct snd_soc_dapm_context *dapm,
3850 const char *pin)
3851 {
3852 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
3853
3854 if (!w) {
3855 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
3856 return -EINVAL;
3857 }
3858
3859 dev_dbg(w->dapm->dev, "ASoC: force enable pin %s\n", pin);
3860 w->connected = 1;
3861 w->force = 1;
3862 dapm_mark_dirty(w, "force enable");
3863
3864 return 0;
3865 }
3866 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin_unlocked);
3867
3868 /**
3869 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
3870 * @dapm: DAPM context
3871 * @pin: pin name
3872 *
3873 * Enables input/output pin regardless of any other state. This is
3874 * intended for use with microphone bias supplies used in microphone
3875 * jack detection.
3876 *
3877 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3878 * do any widget power switching.
3879 */
3880 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
3881 const char *pin)
3882 {
3883 int ret;
3884
3885 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3886
3887 ret = snd_soc_dapm_force_enable_pin_unlocked(dapm, pin);
3888
3889 mutex_unlock(&dapm->card->dapm_mutex);
3890
3891 return ret;
3892 }
3893 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
3894
3895 /**
3896 * snd_soc_dapm_disable_pin_unlocked - disable pin.
3897 * @dapm: DAPM context
3898 * @pin: pin name
3899 *
3900 * Disables input/output pin and its parents or children widgets.
3901 *
3902 * Requires external locking.
3903 *
3904 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3905 * do any widget power switching.
3906 */
3907 int snd_soc_dapm_disable_pin_unlocked(struct snd_soc_dapm_context *dapm,
3908 const char *pin)
3909 {
3910 return snd_soc_dapm_set_pin(dapm, pin, 0);
3911 }
3912 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin_unlocked);
3913
3914 /**
3915 * snd_soc_dapm_disable_pin - disable pin.
3916 * @dapm: DAPM context
3917 * @pin: pin name
3918 *
3919 * Disables input/output pin and its parents or children widgets.
3920 *
3921 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3922 * do any widget power switching.
3923 */
3924 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
3925 const char *pin)
3926 {
3927 int ret;
3928
3929 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3930
3931 ret = snd_soc_dapm_set_pin(dapm, pin, 0);
3932
3933 mutex_unlock(&dapm->card->dapm_mutex);
3934
3935 return ret;
3936 }
3937 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
3938
3939 /**
3940 * snd_soc_dapm_nc_pin_unlocked - permanently disable pin.
3941 * @dapm: DAPM context
3942 * @pin: pin name
3943 *
3944 * Marks the specified pin as being not connected, disabling it along
3945 * any parent or child widgets. At present this is identical to
3946 * snd_soc_dapm_disable_pin() but in future it will be extended to do
3947 * additional things such as disabling controls which only affect
3948 * paths through the pin.
3949 *
3950 * Requires external locking.
3951 *
3952 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3953 * do any widget power switching.
3954 */
3955 int snd_soc_dapm_nc_pin_unlocked(struct snd_soc_dapm_context *dapm,
3956 const char *pin)
3957 {
3958 return snd_soc_dapm_set_pin(dapm, pin, 0);
3959 }
3960 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin_unlocked);
3961
3962 /**
3963 * snd_soc_dapm_nc_pin - permanently disable pin.
3964 * @dapm: DAPM context
3965 * @pin: pin name
3966 *
3967 * Marks the specified pin as being not connected, disabling it along
3968 * any parent or child widgets. At present this is identical to
3969 * snd_soc_dapm_disable_pin() but in future it will be extended to do
3970 * additional things such as disabling controls which only affect
3971 * paths through the pin.
3972 *
3973 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3974 * do any widget power switching.
3975 */
3976 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
3977 {
3978 int ret;
3979
3980 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3981
3982 ret = snd_soc_dapm_set_pin(dapm, pin, 0);
3983
3984 mutex_unlock(&dapm->card->dapm_mutex);
3985
3986 return ret;
3987 }
3988 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
3989
3990 /**
3991 * snd_soc_dapm_get_pin_status - get audio pin status
3992 * @dapm: DAPM context
3993 * @pin: audio signal pin endpoint (or start point)
3994 *
3995 * Get audio pin status - connected or disconnected.
3996 *
3997 * Returns 1 for connected otherwise 0.
3998 */
3999 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
4000 const char *pin)
4001 {
4002 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
4003
4004 if (w)
4005 return w->connected;
4006
4007 return 0;
4008 }
4009 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
4010
4011 /**
4012 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
4013 * @dapm: DAPM context
4014 * @pin: audio signal pin endpoint (or start point)
4015 *
4016 * Mark the given endpoint or pin as ignoring suspend. When the
4017 * system is disabled a path between two endpoints flagged as ignoring
4018 * suspend will not be disabled. The path must already be enabled via
4019 * normal means at suspend time, it will not be turned on if it was not
4020 * already enabled.
4021 */
4022 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
4023 const char *pin)
4024 {
4025 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
4026
4027 if (!w) {
4028 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
4029 return -EINVAL;
4030 }
4031
4032 w->ignore_suspend = 1;
4033
4034 return 0;
4035 }
4036 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
4037
4038 static bool snd_soc_dapm_widget_in_card_paths(struct snd_soc_card *card,
4039 struct snd_soc_dapm_widget *w)
4040 {
4041 struct snd_soc_dapm_path *p;
4042
4043 list_for_each_entry(p, &card->paths, list) {
4044 if ((p->source == w) || (p->sink == w)) {
4045 dev_dbg(card->dev,
4046 "... Path %s(id:%d dapm:%p) - %s(id:%d dapm:%p)\n",
4047 p->source->name, p->source->id, p->source->dapm,
4048 p->sink->name, p->sink->id, p->sink->dapm);
4049
4050 /* Connected to something other than the codec */
4051 if (p->source->dapm != p->sink->dapm)
4052 return true;
4053 /*
4054 * Loopback connection from codec external pin to
4055 * codec external pin
4056 */
4057 if (p->sink->id == snd_soc_dapm_input) {
4058 switch (p->source->id) {
4059 case snd_soc_dapm_output:
4060 case snd_soc_dapm_micbias:
4061 return true;
4062 default:
4063 break;
4064 }
4065 }
4066 }
4067 }
4068
4069 return false;
4070 }
4071
4072 /**
4073 * snd_soc_dapm_auto_nc_codec_pins - call snd_soc_dapm_nc_pin for unused pins
4074 * @codec: The codec whose pins should be processed
4075 *
4076 * Automatically call snd_soc_dapm_nc_pin() for any external pins in the codec
4077 * which are unused. Pins are used if they are connected externally to the
4078 * codec, whether that be to some other device, or a loop-back connection to
4079 * the codec itself.
4080 */
4081 void snd_soc_dapm_auto_nc_codec_pins(struct snd_soc_codec *codec)
4082 {
4083 struct snd_soc_card *card = codec->card;
4084 struct snd_soc_dapm_context *dapm = &codec->dapm;
4085 struct snd_soc_dapm_widget *w;
4086
4087 dev_dbg(codec->dev, "ASoC: Auto NC: DAPMs: card:%p codec:%p\n",
4088 &card->dapm, &codec->dapm);
4089
4090 list_for_each_entry(w, &card->widgets, list) {
4091 if (w->dapm != dapm)
4092 continue;
4093 switch (w->id) {
4094 case snd_soc_dapm_input:
4095 case snd_soc_dapm_output:
4096 case snd_soc_dapm_micbias:
4097 dev_dbg(codec->dev, "ASoC: Auto NC: Checking widget %s\n",
4098 w->name);
4099 if (!snd_soc_dapm_widget_in_card_paths(card, w)) {
4100 dev_dbg(codec->dev,
4101 "... Not in map; disabling\n");
4102 snd_soc_dapm_nc_pin(dapm, w->name);
4103 }
4104 break;
4105 default:
4106 break;
4107 }
4108 }
4109 }
4110
4111 /**
4112 * snd_soc_dapm_free - free dapm resources
4113 * @dapm: DAPM context
4114 *
4115 * Free all dapm widgets and resources.
4116 */
4117 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
4118 {
4119 snd_soc_dapm_sys_remove(dapm->dev);
4120 dapm_debugfs_cleanup(dapm);
4121 dapm_free_widgets(dapm);
4122 list_del(&dapm->list);
4123 }
4124 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
4125
4126 static void soc_dapm_shutdown_dapm(struct snd_soc_dapm_context *dapm)
4127 {
4128 struct snd_soc_card *card = dapm->card;
4129 struct snd_soc_dapm_widget *w;
4130 LIST_HEAD(down_list);
4131 int powerdown = 0;
4132
4133 mutex_lock(&card->dapm_mutex);
4134
4135 list_for_each_entry(w, &dapm->card->widgets, list) {
4136 if (w->dapm != dapm)
4137 continue;
4138 if (w->power) {
4139 dapm_seq_insert(w, &down_list, false);
4140 w->power = 0;
4141 powerdown = 1;
4142 }
4143 }
4144
4145 /* If there were no widgets to power down we're already in
4146 * standby.
4147 */
4148 if (powerdown) {
4149 if (dapm->bias_level == SND_SOC_BIAS_ON)
4150 snd_soc_dapm_set_bias_level(dapm,
4151 SND_SOC_BIAS_PREPARE);
4152 dapm_seq_run(card, &down_list, 0, false);
4153 if (dapm->bias_level == SND_SOC_BIAS_PREPARE)
4154 snd_soc_dapm_set_bias_level(dapm,
4155 SND_SOC_BIAS_STANDBY);
4156 }
4157
4158 mutex_unlock(&card->dapm_mutex);
4159 }
4160
4161 /*
4162 * snd_soc_dapm_shutdown - callback for system shutdown
4163 */
4164 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
4165 {
4166 struct snd_soc_dapm_context *dapm;
4167
4168 list_for_each_entry(dapm, &card->dapm_list, list) {
4169 if (dapm != &card->dapm) {
4170 soc_dapm_shutdown_dapm(dapm);
4171 if (dapm->bias_level == SND_SOC_BIAS_STANDBY)
4172 snd_soc_dapm_set_bias_level(dapm,
4173 SND_SOC_BIAS_OFF);
4174 }
4175 }
4176
4177 soc_dapm_shutdown_dapm(&card->dapm);
4178 if (card->dapm.bias_level == SND_SOC_BIAS_STANDBY)
4179 snd_soc_dapm_set_bias_level(&card->dapm,
4180 SND_SOC_BIAS_OFF);
4181 }
4182
4183 /* Module information */
4184 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
4185 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
4186 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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