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ASoC: dapm: Rename dapm mutex subclass to better match usage
[mirror_ubuntu-bionic-kernel.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/slab.h>
39 #include <sound/core.h>
40 #include <sound/pcm.h>
41 #include <sound/pcm_params.h>
42 #include <sound/soc.h>
43 #include <sound/initval.h>
44
45 #include <trace/events/asoc.h>
46
47 #define DAPM_UPDATE_STAT(widget, val) widget->dapm->card->dapm_stats.val++;
48
49 /* dapm power sequences - make this per codec in the future */
50 static int dapm_up_seq[] = {
51 [snd_soc_dapm_pre] = 0,
52 [snd_soc_dapm_supply] = 1,
53 [snd_soc_dapm_regulator_supply] = 1,
54 [snd_soc_dapm_micbias] = 2,
55 [snd_soc_dapm_dai] = 3,
56 [snd_soc_dapm_aif_in] = 3,
57 [snd_soc_dapm_aif_out] = 3,
58 [snd_soc_dapm_mic] = 4,
59 [snd_soc_dapm_mux] = 5,
60 [snd_soc_dapm_virt_mux] = 5,
61 [snd_soc_dapm_value_mux] = 5,
62 [snd_soc_dapm_dac] = 6,
63 [snd_soc_dapm_mixer] = 7,
64 [snd_soc_dapm_mixer_named_ctl] = 7,
65 [snd_soc_dapm_pga] = 8,
66 [snd_soc_dapm_adc] = 9,
67 [snd_soc_dapm_out_drv] = 10,
68 [snd_soc_dapm_hp] = 10,
69 [snd_soc_dapm_spk] = 10,
70 [snd_soc_dapm_post] = 11,
71 };
72
73 static int dapm_down_seq[] = {
74 [snd_soc_dapm_pre] = 0,
75 [snd_soc_dapm_adc] = 1,
76 [snd_soc_dapm_hp] = 2,
77 [snd_soc_dapm_spk] = 2,
78 [snd_soc_dapm_out_drv] = 2,
79 [snd_soc_dapm_pga] = 4,
80 [snd_soc_dapm_mixer_named_ctl] = 5,
81 [snd_soc_dapm_mixer] = 5,
82 [snd_soc_dapm_dac] = 6,
83 [snd_soc_dapm_mic] = 7,
84 [snd_soc_dapm_micbias] = 8,
85 [snd_soc_dapm_mux] = 9,
86 [snd_soc_dapm_virt_mux] = 9,
87 [snd_soc_dapm_value_mux] = 9,
88 [snd_soc_dapm_aif_in] = 10,
89 [snd_soc_dapm_aif_out] = 10,
90 [snd_soc_dapm_dai] = 10,
91 [snd_soc_dapm_regulator_supply] = 11,
92 [snd_soc_dapm_supply] = 11,
93 [snd_soc_dapm_post] = 12,
94 };
95
96 static void pop_wait(u32 pop_time)
97 {
98 if (pop_time)
99 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
100 }
101
102 static void pop_dbg(struct device *dev, u32 pop_time, const char *fmt, ...)
103 {
104 va_list args;
105 char *buf;
106
107 if (!pop_time)
108 return;
109
110 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
111 if (buf == NULL)
112 return;
113
114 va_start(args, fmt);
115 vsnprintf(buf, PAGE_SIZE, fmt, args);
116 dev_info(dev, "%s", buf);
117 va_end(args);
118
119 kfree(buf);
120 }
121
122 static bool dapm_dirty_widget(struct snd_soc_dapm_widget *w)
123 {
124 return !list_empty(&w->dirty);
125 }
126
127 void dapm_mark_dirty(struct snd_soc_dapm_widget *w, const char *reason)
128 {
129 if (!dapm_dirty_widget(w)) {
130 dev_vdbg(w->dapm->dev, "Marking %s dirty due to %s\n",
131 w->name, reason);
132 list_add_tail(&w->dirty, &w->dapm->card->dapm_dirty);
133 }
134 }
135 EXPORT_SYMBOL_GPL(dapm_mark_dirty);
136
137 /* create a new dapm widget */
138 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
139 const struct snd_soc_dapm_widget *_widget)
140 {
141 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
142 }
143
144 /* get snd_card from DAPM context */
145 static inline struct snd_card *dapm_get_snd_card(
146 struct snd_soc_dapm_context *dapm)
147 {
148 if (dapm->codec)
149 return dapm->codec->card->snd_card;
150 else if (dapm->platform)
151 return dapm->platform->card->snd_card;
152 else
153 BUG();
154
155 /* unreachable */
156 return NULL;
157 }
158
159 /* get soc_card from DAPM context */
160 static inline struct snd_soc_card *dapm_get_soc_card(
161 struct snd_soc_dapm_context *dapm)
162 {
163 if (dapm->codec)
164 return dapm->codec->card;
165 else if (dapm->platform)
166 return dapm->platform->card;
167 else
168 BUG();
169
170 /* unreachable */
171 return NULL;
172 }
173
174 static void dapm_reset(struct snd_soc_card *card)
175 {
176 struct snd_soc_dapm_widget *w;
177
178 memset(&card->dapm_stats, 0, sizeof(card->dapm_stats));
179
180 list_for_each_entry(w, &card->widgets, list) {
181 w->power_checked = false;
182 w->inputs = -1;
183 w->outputs = -1;
184 }
185 }
186
187 static int soc_widget_read(struct snd_soc_dapm_widget *w, int reg)
188 {
189 if (w->codec)
190 return snd_soc_read(w->codec, reg);
191 else if (w->platform)
192 return snd_soc_platform_read(w->platform, reg);
193
194 dev_err(w->dapm->dev, "no valid widget read method\n");
195 return -1;
196 }
197
198 static int soc_widget_write(struct snd_soc_dapm_widget *w, int reg, int val)
199 {
200 if (w->codec)
201 return snd_soc_write(w->codec, reg, val);
202 else if (w->platform)
203 return snd_soc_platform_write(w->platform, reg, val);
204
205 dev_err(w->dapm->dev, "no valid widget write method\n");
206 return -1;
207 }
208
209 static int soc_widget_update_bits(struct snd_soc_dapm_widget *w,
210 unsigned short reg, unsigned int mask, unsigned int value)
211 {
212 bool change;
213 unsigned int old, new;
214 int ret;
215
216 if (w->codec && w->codec->using_regmap) {
217 ret = regmap_update_bits_check(w->codec->control_data,
218 reg, mask, value, &change);
219 if (ret != 0)
220 return ret;
221 } else {
222 ret = soc_widget_read(w, reg);
223 if (ret < 0)
224 return ret;
225
226 old = ret;
227 new = (old & ~mask) | (value & mask);
228 change = old != new;
229 if (change) {
230 ret = soc_widget_write(w, reg, new);
231 if (ret < 0)
232 return ret;
233 }
234 }
235
236 return change;
237 }
238
239 /**
240 * snd_soc_dapm_set_bias_level - set the bias level for the system
241 * @dapm: DAPM context
242 * @level: level to configure
243 *
244 * Configure the bias (power) levels for the SoC audio device.
245 *
246 * Returns 0 for success else error.
247 */
248 static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm,
249 enum snd_soc_bias_level level)
250 {
251 struct snd_soc_card *card = dapm->card;
252 int ret = 0;
253
254 trace_snd_soc_bias_level_start(card, level);
255
256 if (card && card->set_bias_level)
257 ret = card->set_bias_level(card, dapm, level);
258 if (ret != 0)
259 goto out;
260
261 if (dapm->codec) {
262 if (dapm->codec->driver->set_bias_level)
263 ret = dapm->codec->driver->set_bias_level(dapm->codec,
264 level);
265 else
266 dapm->bias_level = level;
267 }
268 if (ret != 0)
269 goto out;
270
271 if (card && card->set_bias_level_post)
272 ret = card->set_bias_level_post(card, dapm, level);
273 out:
274 trace_snd_soc_bias_level_done(card, level);
275
276 return ret;
277 }
278
279 /* set up initial codec paths */
280 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
281 struct snd_soc_dapm_path *p, int i)
282 {
283 switch (w->id) {
284 case snd_soc_dapm_switch:
285 case snd_soc_dapm_mixer:
286 case snd_soc_dapm_mixer_named_ctl: {
287 int val;
288 struct soc_mixer_control *mc = (struct soc_mixer_control *)
289 w->kcontrol_news[i].private_value;
290 unsigned int reg = mc->reg;
291 unsigned int shift = mc->shift;
292 int max = mc->max;
293 unsigned int mask = (1 << fls(max)) - 1;
294 unsigned int invert = mc->invert;
295
296 val = soc_widget_read(w, reg);
297 val = (val >> shift) & mask;
298
299 if ((invert && !val) || (!invert && val))
300 p->connect = 1;
301 else
302 p->connect = 0;
303 }
304 break;
305 case snd_soc_dapm_mux: {
306 struct soc_enum *e = (struct soc_enum *)
307 w->kcontrol_news[i].private_value;
308 int val, item, bitmask;
309
310 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
311 ;
312 val = soc_widget_read(w, e->reg);
313 item = (val >> e->shift_l) & (bitmask - 1);
314
315 p->connect = 0;
316 for (i = 0; i < e->max; i++) {
317 if (!(strcmp(p->name, e->texts[i])) && item == i)
318 p->connect = 1;
319 }
320 }
321 break;
322 case snd_soc_dapm_virt_mux: {
323 struct soc_enum *e = (struct soc_enum *)
324 w->kcontrol_news[i].private_value;
325
326 p->connect = 0;
327 /* since a virtual mux has no backing registers to
328 * decide which path to connect, it will try to match
329 * with the first enumeration. This is to ensure
330 * that the default mux choice (the first) will be
331 * correctly powered up during initialization.
332 */
333 if (!strcmp(p->name, e->texts[0]))
334 p->connect = 1;
335 }
336 break;
337 case snd_soc_dapm_value_mux: {
338 struct soc_enum *e = (struct soc_enum *)
339 w->kcontrol_news[i].private_value;
340 int val, item;
341
342 val = soc_widget_read(w, e->reg);
343 val = (val >> e->shift_l) & e->mask;
344 for (item = 0; item < e->max; item++) {
345 if (val == e->values[item])
346 break;
347 }
348
349 p->connect = 0;
350 for (i = 0; i < e->max; i++) {
351 if (!(strcmp(p->name, e->texts[i])) && item == i)
352 p->connect = 1;
353 }
354 }
355 break;
356 /* does not affect routing - always connected */
357 case snd_soc_dapm_pga:
358 case snd_soc_dapm_out_drv:
359 case snd_soc_dapm_output:
360 case snd_soc_dapm_adc:
361 case snd_soc_dapm_input:
362 case snd_soc_dapm_siggen:
363 case snd_soc_dapm_dac:
364 case snd_soc_dapm_micbias:
365 case snd_soc_dapm_vmid:
366 case snd_soc_dapm_supply:
367 case snd_soc_dapm_regulator_supply:
368 case snd_soc_dapm_aif_in:
369 case snd_soc_dapm_aif_out:
370 case snd_soc_dapm_dai:
371 case snd_soc_dapm_hp:
372 case snd_soc_dapm_mic:
373 case snd_soc_dapm_spk:
374 case snd_soc_dapm_line:
375 p->connect = 1;
376 break;
377 /* does affect routing - dynamically connected */
378 case snd_soc_dapm_pre:
379 case snd_soc_dapm_post:
380 p->connect = 0;
381 break;
382 }
383 }
384
385 /* connect mux widget to its interconnecting audio paths */
386 static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
387 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
388 struct snd_soc_dapm_path *path, const char *control_name,
389 const struct snd_kcontrol_new *kcontrol)
390 {
391 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
392 int i;
393
394 for (i = 0; i < e->max; i++) {
395 if (!(strcmp(control_name, e->texts[i]))) {
396 list_add(&path->list, &dapm->card->paths);
397 list_add(&path->list_sink, &dest->sources);
398 list_add(&path->list_source, &src->sinks);
399 path->name = (char*)e->texts[i];
400 dapm_set_path_status(dest, path, 0);
401 return 0;
402 }
403 }
404
405 return -ENODEV;
406 }
407
408 /* connect mixer widget to its interconnecting audio paths */
409 static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
410 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
411 struct snd_soc_dapm_path *path, const char *control_name)
412 {
413 int i;
414
415 /* search for mixer kcontrol */
416 for (i = 0; i < dest->num_kcontrols; i++) {
417 if (!strcmp(control_name, dest->kcontrol_news[i].name)) {
418 list_add(&path->list, &dapm->card->paths);
419 list_add(&path->list_sink, &dest->sources);
420 list_add(&path->list_source, &src->sinks);
421 path->name = dest->kcontrol_news[i].name;
422 dapm_set_path_status(dest, path, i);
423 return 0;
424 }
425 }
426 return -ENODEV;
427 }
428
429 static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm,
430 struct snd_soc_dapm_widget *kcontrolw,
431 const struct snd_kcontrol_new *kcontrol_new,
432 struct snd_kcontrol **kcontrol)
433 {
434 struct snd_soc_dapm_widget *w;
435 int i;
436
437 *kcontrol = NULL;
438
439 list_for_each_entry(w, &dapm->card->widgets, list) {
440 if (w == kcontrolw || w->dapm != kcontrolw->dapm)
441 continue;
442 for (i = 0; i < w->num_kcontrols; i++) {
443 if (&w->kcontrol_news[i] == kcontrol_new) {
444 if (w->kcontrols)
445 *kcontrol = w->kcontrols[i];
446 return 1;
447 }
448 }
449 }
450
451 return 0;
452 }
453
454 /* create new dapm mixer control */
455 static int dapm_new_mixer(struct snd_soc_dapm_widget *w)
456 {
457 struct snd_soc_dapm_context *dapm = w->dapm;
458 int i, ret = 0;
459 size_t name_len, prefix_len;
460 struct snd_soc_dapm_path *path;
461 struct snd_card *card = dapm->card->snd_card;
462 const char *prefix;
463 struct snd_soc_dapm_widget_list *wlist;
464 size_t wlistsize;
465
466 if (dapm->codec)
467 prefix = dapm->codec->name_prefix;
468 else
469 prefix = NULL;
470
471 if (prefix)
472 prefix_len = strlen(prefix) + 1;
473 else
474 prefix_len = 0;
475
476 /* add kcontrol */
477 for (i = 0; i < w->num_kcontrols; i++) {
478
479 /* match name */
480 list_for_each_entry(path, &w->sources, list_sink) {
481
482 /* mixer/mux paths name must match control name */
483 if (path->name != (char *)w->kcontrol_news[i].name)
484 continue;
485
486 if (w->kcontrols[i]) {
487 path->kcontrol = w->kcontrols[i];
488 continue;
489 }
490
491 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
492 sizeof(struct snd_soc_dapm_widget *),
493 wlist = kzalloc(wlistsize, GFP_KERNEL);
494 if (wlist == NULL) {
495 dev_err(dapm->dev,
496 "asoc: can't allocate widget list for %s\n",
497 w->name);
498 return -ENOMEM;
499 }
500 wlist->num_widgets = 1;
501 wlist->widgets[0] = w;
502
503 /* add dapm control with long name.
504 * for dapm_mixer this is the concatenation of the
505 * mixer and kcontrol name.
506 * for dapm_mixer_named_ctl this is simply the
507 * kcontrol name.
508 */
509 name_len = strlen(w->kcontrol_news[i].name) + 1;
510 if (w->id != snd_soc_dapm_mixer_named_ctl)
511 name_len += 1 + strlen(w->name);
512
513 path->long_name = kmalloc(name_len, GFP_KERNEL);
514
515 if (path->long_name == NULL) {
516 kfree(wlist);
517 return -ENOMEM;
518 }
519
520 switch (w->id) {
521 default:
522 /* The control will get a prefix from
523 * the control creation process but
524 * we're also using the same prefix
525 * for widgets so cut the prefix off
526 * the front of the widget name.
527 */
528 snprintf((char *)path->long_name, name_len,
529 "%s %s", w->name + prefix_len,
530 w->kcontrol_news[i].name);
531 break;
532 case snd_soc_dapm_mixer_named_ctl:
533 snprintf((char *)path->long_name, name_len,
534 "%s", w->kcontrol_news[i].name);
535 break;
536 }
537
538 ((char *)path->long_name)[name_len - 1] = '\0';
539
540 path->kcontrol = snd_soc_cnew(&w->kcontrol_news[i],
541 wlist, path->long_name,
542 prefix);
543 ret = snd_ctl_add(card, path->kcontrol);
544 if (ret < 0) {
545 dev_err(dapm->dev,
546 "asoc: failed to add dapm kcontrol %s: %d\n",
547 path->long_name, ret);
548 kfree(wlist);
549 kfree(path->long_name);
550 path->long_name = NULL;
551 return ret;
552 }
553 w->kcontrols[i] = path->kcontrol;
554 }
555 }
556 return ret;
557 }
558
559 /* create new dapm mux control */
560 static int dapm_new_mux(struct snd_soc_dapm_widget *w)
561 {
562 struct snd_soc_dapm_context *dapm = w->dapm;
563 struct snd_soc_dapm_path *path = NULL;
564 struct snd_kcontrol *kcontrol;
565 struct snd_card *card = dapm->card->snd_card;
566 const char *prefix;
567 size_t prefix_len;
568 int ret;
569 struct snd_soc_dapm_widget_list *wlist;
570 int shared, wlistentries;
571 size_t wlistsize;
572 const char *name;
573
574 if (w->num_kcontrols != 1) {
575 dev_err(dapm->dev,
576 "asoc: mux %s has incorrect number of controls\n",
577 w->name);
578 return -EINVAL;
579 }
580
581 shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[0],
582 &kcontrol);
583 if (kcontrol) {
584 wlist = kcontrol->private_data;
585 wlistentries = wlist->num_widgets + 1;
586 } else {
587 wlist = NULL;
588 wlistentries = 1;
589 }
590 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
591 wlistentries * sizeof(struct snd_soc_dapm_widget *),
592 wlist = krealloc(wlist, wlistsize, GFP_KERNEL);
593 if (wlist == NULL) {
594 dev_err(dapm->dev,
595 "asoc: can't allocate widget list for %s\n", w->name);
596 return -ENOMEM;
597 }
598 wlist->num_widgets = wlistentries;
599 wlist->widgets[wlistentries - 1] = w;
600
601 if (!kcontrol) {
602 if (dapm->codec)
603 prefix = dapm->codec->name_prefix;
604 else
605 prefix = NULL;
606
607 if (shared) {
608 name = w->kcontrol_news[0].name;
609 prefix_len = 0;
610 } else {
611 name = w->name;
612 if (prefix)
613 prefix_len = strlen(prefix) + 1;
614 else
615 prefix_len = 0;
616 }
617
618 /*
619 * The control will get a prefix from the control creation
620 * process but we're also using the same prefix for widgets so
621 * cut the prefix off the front of the widget name.
622 */
623 kcontrol = snd_soc_cnew(&w->kcontrol_news[0], wlist,
624 name + prefix_len, prefix);
625 ret = snd_ctl_add(card, kcontrol);
626 if (ret < 0) {
627 dev_err(dapm->dev, "failed to add kcontrol %s: %d\n",
628 w->name, ret);
629 kfree(wlist);
630 return ret;
631 }
632 }
633
634 kcontrol->private_data = wlist;
635
636 w->kcontrols[0] = kcontrol;
637
638 list_for_each_entry(path, &w->sources, list_sink)
639 path->kcontrol = kcontrol;
640
641 return 0;
642 }
643
644 /* create new dapm volume control */
645 static int dapm_new_pga(struct snd_soc_dapm_widget *w)
646 {
647 if (w->num_kcontrols)
648 dev_err(w->dapm->dev,
649 "asoc: PGA controls not supported: '%s'\n", w->name);
650
651 return 0;
652 }
653
654 /* reset 'walked' bit for each dapm path */
655 static inline void dapm_clear_walk(struct snd_soc_dapm_context *dapm)
656 {
657 struct snd_soc_dapm_path *p;
658
659 list_for_each_entry(p, &dapm->card->paths, list)
660 p->walked = 0;
661 }
662
663 /* We implement power down on suspend by checking the power state of
664 * the ALSA card - when we are suspending the ALSA state for the card
665 * is set to D3.
666 */
667 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
668 {
669 int level = snd_power_get_state(widget->dapm->card->snd_card);
670
671 switch (level) {
672 case SNDRV_CTL_POWER_D3hot:
673 case SNDRV_CTL_POWER_D3cold:
674 if (widget->ignore_suspend)
675 dev_dbg(widget->dapm->dev, "%s ignoring suspend\n",
676 widget->name);
677 return widget->ignore_suspend;
678 default:
679 return 1;
680 }
681 }
682
683 /*
684 * Recursively check for a completed path to an active or physically connected
685 * output widget. Returns number of complete paths.
686 */
687 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
688 {
689 struct snd_soc_dapm_path *path;
690 int con = 0;
691
692 if (widget->outputs >= 0)
693 return widget->outputs;
694
695 DAPM_UPDATE_STAT(widget, path_checks);
696
697 switch (widget->id) {
698 case snd_soc_dapm_supply:
699 case snd_soc_dapm_regulator_supply:
700 return 0;
701 default:
702 break;
703 }
704
705 switch (widget->id) {
706 case snd_soc_dapm_adc:
707 case snd_soc_dapm_aif_out:
708 case snd_soc_dapm_dai:
709 if (widget->active) {
710 widget->outputs = snd_soc_dapm_suspend_check(widget);
711 return widget->outputs;
712 }
713 default:
714 break;
715 }
716
717 if (widget->connected) {
718 /* connected pin ? */
719 if (widget->id == snd_soc_dapm_output && !widget->ext) {
720 widget->outputs = snd_soc_dapm_suspend_check(widget);
721 return widget->outputs;
722 }
723
724 /* connected jack or spk ? */
725 if (widget->id == snd_soc_dapm_hp ||
726 widget->id == snd_soc_dapm_spk ||
727 (widget->id == snd_soc_dapm_line &&
728 !list_empty(&widget->sources))) {
729 widget->outputs = snd_soc_dapm_suspend_check(widget);
730 return widget->outputs;
731 }
732 }
733
734 list_for_each_entry(path, &widget->sinks, list_source) {
735 DAPM_UPDATE_STAT(widget, neighbour_checks);
736
737 if (path->weak)
738 continue;
739
740 if (path->walked)
741 continue;
742
743 if (path->sink && path->connect) {
744 path->walked = 1;
745 con += is_connected_output_ep(path->sink);
746 }
747 }
748
749 widget->outputs = con;
750
751 return con;
752 }
753
754 /*
755 * Recursively check for a completed path to an active or physically connected
756 * input widget. Returns number of complete paths.
757 */
758 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
759 {
760 struct snd_soc_dapm_path *path;
761 int con = 0;
762
763 if (widget->inputs >= 0)
764 return widget->inputs;
765
766 DAPM_UPDATE_STAT(widget, path_checks);
767
768 switch (widget->id) {
769 case snd_soc_dapm_supply:
770 case snd_soc_dapm_regulator_supply:
771 return 0;
772 default:
773 break;
774 }
775
776 /* active stream ? */
777 switch (widget->id) {
778 case snd_soc_dapm_dac:
779 case snd_soc_dapm_aif_in:
780 case snd_soc_dapm_dai:
781 if (widget->active) {
782 widget->inputs = snd_soc_dapm_suspend_check(widget);
783 return widget->inputs;
784 }
785 default:
786 break;
787 }
788
789 if (widget->connected) {
790 /* connected pin ? */
791 if (widget->id == snd_soc_dapm_input && !widget->ext) {
792 widget->inputs = snd_soc_dapm_suspend_check(widget);
793 return widget->inputs;
794 }
795
796 /* connected VMID/Bias for lower pops */
797 if (widget->id == snd_soc_dapm_vmid) {
798 widget->inputs = snd_soc_dapm_suspend_check(widget);
799 return widget->inputs;
800 }
801
802 /* connected jack ? */
803 if (widget->id == snd_soc_dapm_mic ||
804 (widget->id == snd_soc_dapm_line &&
805 !list_empty(&widget->sinks))) {
806 widget->inputs = snd_soc_dapm_suspend_check(widget);
807 return widget->inputs;
808 }
809
810 /* signal generator */
811 if (widget->id == snd_soc_dapm_siggen) {
812 widget->inputs = snd_soc_dapm_suspend_check(widget);
813 return widget->inputs;
814 }
815 }
816
817 list_for_each_entry(path, &widget->sources, list_sink) {
818 DAPM_UPDATE_STAT(widget, neighbour_checks);
819
820 if (path->weak)
821 continue;
822
823 if (path->walked)
824 continue;
825
826 if (path->source && path->connect) {
827 path->walked = 1;
828 con += is_connected_input_ep(path->source);
829 }
830 }
831
832 widget->inputs = con;
833
834 return con;
835 }
836
837 /*
838 * Handler for generic register modifier widget.
839 */
840 int dapm_reg_event(struct snd_soc_dapm_widget *w,
841 struct snd_kcontrol *kcontrol, int event)
842 {
843 unsigned int val;
844
845 if (SND_SOC_DAPM_EVENT_ON(event))
846 val = w->on_val;
847 else
848 val = w->off_val;
849
850 soc_widget_update_bits(w, -(w->reg + 1),
851 w->mask << w->shift, val << w->shift);
852
853 return 0;
854 }
855 EXPORT_SYMBOL_GPL(dapm_reg_event);
856
857 /*
858 * Handler for regulator supply widget.
859 */
860 int dapm_regulator_event(struct snd_soc_dapm_widget *w,
861 struct snd_kcontrol *kcontrol, int event)
862 {
863 if (SND_SOC_DAPM_EVENT_ON(event))
864 return regulator_enable(w->priv);
865 else
866 return regulator_disable_deferred(w->priv, w->shift);
867 }
868 EXPORT_SYMBOL_GPL(dapm_regulator_event);
869
870 static int dapm_widget_power_check(struct snd_soc_dapm_widget *w)
871 {
872 if (w->power_checked)
873 return w->new_power;
874
875 if (w->force)
876 w->new_power = 1;
877 else
878 w->new_power = w->power_check(w);
879
880 w->power_checked = true;
881
882 return w->new_power;
883 }
884
885 /* Generic check to see if a widget should be powered.
886 */
887 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
888 {
889 int in, out;
890
891 DAPM_UPDATE_STAT(w, power_checks);
892
893 in = is_connected_input_ep(w);
894 dapm_clear_walk(w->dapm);
895 out = is_connected_output_ep(w);
896 dapm_clear_walk(w->dapm);
897 return out != 0 && in != 0;
898 }
899
900 static int dapm_dai_check_power(struct snd_soc_dapm_widget *w)
901 {
902 DAPM_UPDATE_STAT(w, power_checks);
903
904 return w->active;
905 }
906
907 /* Check to see if an ADC has power */
908 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
909 {
910 int in;
911
912 DAPM_UPDATE_STAT(w, power_checks);
913
914 if (w->active) {
915 in = is_connected_input_ep(w);
916 dapm_clear_walk(w->dapm);
917 return in != 0;
918 } else {
919 return dapm_generic_check_power(w);
920 }
921 }
922
923 /* Check to see if a DAC has power */
924 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
925 {
926 int out;
927
928 DAPM_UPDATE_STAT(w, power_checks);
929
930 if (w->active) {
931 out = is_connected_output_ep(w);
932 dapm_clear_walk(w->dapm);
933 return out != 0;
934 } else {
935 return dapm_generic_check_power(w);
936 }
937 }
938
939 /* Check to see if a power supply is needed */
940 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
941 {
942 struct snd_soc_dapm_path *path;
943
944 DAPM_UPDATE_STAT(w, power_checks);
945
946 /* Check if one of our outputs is connected */
947 list_for_each_entry(path, &w->sinks, list_source) {
948 DAPM_UPDATE_STAT(w, neighbour_checks);
949
950 if (path->weak)
951 continue;
952
953 if (path->connected &&
954 !path->connected(path->source, path->sink))
955 continue;
956
957 if (!path->sink)
958 continue;
959
960 if (dapm_widget_power_check(path->sink))
961 return 1;
962 }
963
964 dapm_clear_walk(w->dapm);
965
966 return 0;
967 }
968
969 static int dapm_always_on_check_power(struct snd_soc_dapm_widget *w)
970 {
971 return 1;
972 }
973
974 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
975 struct snd_soc_dapm_widget *b,
976 bool power_up)
977 {
978 int *sort;
979
980 if (power_up)
981 sort = dapm_up_seq;
982 else
983 sort = dapm_down_seq;
984
985 if (sort[a->id] != sort[b->id])
986 return sort[a->id] - sort[b->id];
987 if (a->subseq != b->subseq) {
988 if (power_up)
989 return a->subseq - b->subseq;
990 else
991 return b->subseq - a->subseq;
992 }
993 if (a->reg != b->reg)
994 return a->reg - b->reg;
995 if (a->dapm != b->dapm)
996 return (unsigned long)a->dapm - (unsigned long)b->dapm;
997
998 return 0;
999 }
1000
1001 /* Insert a widget in order into a DAPM power sequence. */
1002 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
1003 struct list_head *list,
1004 bool power_up)
1005 {
1006 struct snd_soc_dapm_widget *w;
1007
1008 list_for_each_entry(w, list, power_list)
1009 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
1010 list_add_tail(&new_widget->power_list, &w->power_list);
1011 return;
1012 }
1013
1014 list_add_tail(&new_widget->power_list, list);
1015 }
1016
1017 static void dapm_seq_check_event(struct snd_soc_dapm_context *dapm,
1018 struct snd_soc_dapm_widget *w, int event)
1019 {
1020 struct snd_soc_card *card = dapm->card;
1021 const char *ev_name;
1022 int power, ret;
1023
1024 switch (event) {
1025 case SND_SOC_DAPM_PRE_PMU:
1026 ev_name = "PRE_PMU";
1027 power = 1;
1028 break;
1029 case SND_SOC_DAPM_POST_PMU:
1030 ev_name = "POST_PMU";
1031 power = 1;
1032 break;
1033 case SND_SOC_DAPM_PRE_PMD:
1034 ev_name = "PRE_PMD";
1035 power = 0;
1036 break;
1037 case SND_SOC_DAPM_POST_PMD:
1038 ev_name = "POST_PMD";
1039 power = 0;
1040 break;
1041 default:
1042 BUG();
1043 return;
1044 }
1045
1046 if (w->power != power)
1047 return;
1048
1049 if (w->event && (w->event_flags & event)) {
1050 pop_dbg(dapm->dev, card->pop_time, "pop test : %s %s\n",
1051 w->name, ev_name);
1052 trace_snd_soc_dapm_widget_event_start(w, event);
1053 ret = w->event(w, NULL, event);
1054 trace_snd_soc_dapm_widget_event_done(w, event);
1055 if (ret < 0)
1056 pr_err("%s: %s event failed: %d\n",
1057 ev_name, w->name, ret);
1058 }
1059 }
1060
1061 /* Apply the coalesced changes from a DAPM sequence */
1062 static void dapm_seq_run_coalesced(struct snd_soc_dapm_context *dapm,
1063 struct list_head *pending)
1064 {
1065 struct snd_soc_card *card = dapm->card;
1066 struct snd_soc_dapm_widget *w;
1067 int reg, power;
1068 unsigned int value = 0;
1069 unsigned int mask = 0;
1070 unsigned int cur_mask;
1071
1072 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
1073 power_list)->reg;
1074
1075 list_for_each_entry(w, pending, power_list) {
1076 cur_mask = 1 << w->shift;
1077 BUG_ON(reg != w->reg);
1078
1079 if (w->invert)
1080 power = !w->power;
1081 else
1082 power = w->power;
1083
1084 mask |= cur_mask;
1085 if (power)
1086 value |= cur_mask;
1087
1088 pop_dbg(dapm->dev, card->pop_time,
1089 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
1090 w->name, reg, value, mask);
1091
1092 /* Check for events */
1093 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMU);
1094 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMD);
1095 }
1096
1097 if (reg >= 0) {
1098 /* Any widget will do, they should all be updating the
1099 * same register.
1100 */
1101 w = list_first_entry(pending, struct snd_soc_dapm_widget,
1102 power_list);
1103
1104 pop_dbg(dapm->dev, card->pop_time,
1105 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
1106 value, mask, reg, card->pop_time);
1107 pop_wait(card->pop_time);
1108 soc_widget_update_bits(w, reg, mask, value);
1109 }
1110
1111 list_for_each_entry(w, pending, power_list) {
1112 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMU);
1113 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMD);
1114 }
1115 }
1116
1117 /* Apply a DAPM power sequence.
1118 *
1119 * We walk over a pre-sorted list of widgets to apply power to. In
1120 * order to minimise the number of writes to the device required
1121 * multiple widgets will be updated in a single write where possible.
1122 * Currently anything that requires more than a single write is not
1123 * handled.
1124 */
1125 static void dapm_seq_run(struct snd_soc_dapm_context *dapm,
1126 struct list_head *list, int event, bool power_up)
1127 {
1128 struct snd_soc_dapm_widget *w, *n;
1129 LIST_HEAD(pending);
1130 int cur_sort = -1;
1131 int cur_subseq = -1;
1132 int cur_reg = SND_SOC_NOPM;
1133 struct snd_soc_dapm_context *cur_dapm = NULL;
1134 int ret, i;
1135 int *sort;
1136
1137 if (power_up)
1138 sort = dapm_up_seq;
1139 else
1140 sort = dapm_down_seq;
1141
1142 list_for_each_entry_safe(w, n, list, power_list) {
1143 ret = 0;
1144
1145 /* Do we need to apply any queued changes? */
1146 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
1147 w->dapm != cur_dapm || w->subseq != cur_subseq) {
1148 if (!list_empty(&pending))
1149 dapm_seq_run_coalesced(cur_dapm, &pending);
1150
1151 if (cur_dapm && cur_dapm->seq_notifier) {
1152 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1153 if (sort[i] == cur_sort)
1154 cur_dapm->seq_notifier(cur_dapm,
1155 i,
1156 cur_subseq);
1157 }
1158
1159 INIT_LIST_HEAD(&pending);
1160 cur_sort = -1;
1161 cur_subseq = INT_MIN;
1162 cur_reg = SND_SOC_NOPM;
1163 cur_dapm = NULL;
1164 }
1165
1166 switch (w->id) {
1167 case snd_soc_dapm_pre:
1168 if (!w->event)
1169 list_for_each_entry_safe_continue(w, n, list,
1170 power_list);
1171
1172 if (event == SND_SOC_DAPM_STREAM_START)
1173 ret = w->event(w,
1174 NULL, SND_SOC_DAPM_PRE_PMU);
1175 else if (event == SND_SOC_DAPM_STREAM_STOP)
1176 ret = w->event(w,
1177 NULL, SND_SOC_DAPM_PRE_PMD);
1178 break;
1179
1180 case snd_soc_dapm_post:
1181 if (!w->event)
1182 list_for_each_entry_safe_continue(w, n, list,
1183 power_list);
1184
1185 if (event == SND_SOC_DAPM_STREAM_START)
1186 ret = w->event(w,
1187 NULL, SND_SOC_DAPM_POST_PMU);
1188 else if (event == SND_SOC_DAPM_STREAM_STOP)
1189 ret = w->event(w,
1190 NULL, SND_SOC_DAPM_POST_PMD);
1191 break;
1192
1193 default:
1194 /* Queue it up for application */
1195 cur_sort = sort[w->id];
1196 cur_subseq = w->subseq;
1197 cur_reg = w->reg;
1198 cur_dapm = w->dapm;
1199 list_move(&w->power_list, &pending);
1200 break;
1201 }
1202
1203 if (ret < 0)
1204 dev_err(w->dapm->dev,
1205 "Failed to apply widget power: %d\n", ret);
1206 }
1207
1208 if (!list_empty(&pending))
1209 dapm_seq_run_coalesced(cur_dapm, &pending);
1210
1211 if (cur_dapm && cur_dapm->seq_notifier) {
1212 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1213 if (sort[i] == cur_sort)
1214 cur_dapm->seq_notifier(cur_dapm,
1215 i, cur_subseq);
1216 }
1217 }
1218
1219 static void dapm_widget_update(struct snd_soc_dapm_context *dapm)
1220 {
1221 struct snd_soc_dapm_update *update = dapm->update;
1222 struct snd_soc_dapm_widget *w;
1223 int ret;
1224
1225 if (!update)
1226 return;
1227
1228 w = update->widget;
1229
1230 if (w->event &&
1231 (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
1232 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
1233 if (ret != 0)
1234 pr_err("%s DAPM pre-event failed: %d\n",
1235 w->name, ret);
1236 }
1237
1238 ret = snd_soc_update_bits(w->codec, update->reg, update->mask,
1239 update->val);
1240 if (ret < 0)
1241 pr_err("%s DAPM update failed: %d\n", w->name, ret);
1242
1243 if (w->event &&
1244 (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1245 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1246 if (ret != 0)
1247 pr_err("%s DAPM post-event failed: %d\n",
1248 w->name, ret);
1249 }
1250 }
1251
1252 /* Async callback run prior to DAPM sequences - brings to _PREPARE if
1253 * they're changing state.
1254 */
1255 static void dapm_pre_sequence_async(void *data, async_cookie_t cookie)
1256 {
1257 struct snd_soc_dapm_context *d = data;
1258 int ret;
1259
1260 /* If we're off and we're not supposed to be go into STANDBY */
1261 if (d->bias_level == SND_SOC_BIAS_OFF &&
1262 d->target_bias_level != SND_SOC_BIAS_OFF) {
1263 if (d->dev)
1264 pm_runtime_get_sync(d->dev);
1265
1266 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1267 if (ret != 0)
1268 dev_err(d->dev,
1269 "Failed to turn on bias: %d\n", ret);
1270 }
1271
1272 /* Prepare for a STADDBY->ON or ON->STANDBY transition */
1273 if (d->bias_level != d->target_bias_level) {
1274 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);
1275 if (ret != 0)
1276 dev_err(d->dev,
1277 "Failed to prepare bias: %d\n", ret);
1278 }
1279 }
1280
1281 /* Async callback run prior to DAPM sequences - brings to their final
1282 * state.
1283 */
1284 static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
1285 {
1286 struct snd_soc_dapm_context *d = data;
1287 int ret;
1288
1289 /* If we just powered the last thing off drop to standby bias */
1290 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1291 (d->target_bias_level == SND_SOC_BIAS_STANDBY ||
1292 d->target_bias_level == SND_SOC_BIAS_OFF)) {
1293 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1294 if (ret != 0)
1295 dev_err(d->dev, "Failed to apply standby bias: %d\n",
1296 ret);
1297 }
1298
1299 /* If we're in standby and can support bias off then do that */
1300 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1301 d->target_bias_level == SND_SOC_BIAS_OFF) {
1302 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);
1303 if (ret != 0)
1304 dev_err(d->dev, "Failed to turn off bias: %d\n", ret);
1305
1306 if (d->dev)
1307 pm_runtime_put(d->dev);
1308 }
1309
1310 /* If we just powered up then move to active bias */
1311 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1312 d->target_bias_level == SND_SOC_BIAS_ON) {
1313 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);
1314 if (ret != 0)
1315 dev_err(d->dev, "Failed to apply active bias: %d\n",
1316 ret);
1317 }
1318 }
1319
1320 static void dapm_widget_set_peer_power(struct snd_soc_dapm_widget *peer,
1321 bool power, bool connect)
1322 {
1323 /* If a connection is being made or broken then that update
1324 * will have marked the peer dirty, otherwise the widgets are
1325 * not connected and this update has no impact. */
1326 if (!connect)
1327 return;
1328
1329 /* If the peer is already in the state we're moving to then we
1330 * won't have an impact on it. */
1331 if (power != peer->power)
1332 dapm_mark_dirty(peer, "peer state change");
1333 }
1334
1335 static void dapm_widget_set_power(struct snd_soc_dapm_widget *w, bool power,
1336 struct list_head *up_list,
1337 struct list_head *down_list)
1338 {
1339 struct snd_soc_dapm_path *path;
1340
1341 if (w->power == power)
1342 return;
1343
1344 trace_snd_soc_dapm_widget_power(w, power);
1345
1346 /* If we changed our power state perhaps our neigbours changed
1347 * also.
1348 */
1349 list_for_each_entry(path, &w->sources, list_sink) {
1350 if (path->source) {
1351 dapm_widget_set_peer_power(path->source, power,
1352 path->connect);
1353 }
1354 }
1355 switch (w->id) {
1356 case snd_soc_dapm_supply:
1357 case snd_soc_dapm_regulator_supply:
1358 /* Supplies can't affect their outputs, only their inputs */
1359 break;
1360 default:
1361 list_for_each_entry(path, &w->sinks, list_source) {
1362 if (path->sink) {
1363 dapm_widget_set_peer_power(path->sink, power,
1364 path->connect);
1365 }
1366 }
1367 break;
1368 }
1369
1370 if (power)
1371 dapm_seq_insert(w, up_list, true);
1372 else
1373 dapm_seq_insert(w, down_list, false);
1374
1375 w->power = power;
1376 }
1377
1378 static void dapm_power_one_widget(struct snd_soc_dapm_widget *w,
1379 struct list_head *up_list,
1380 struct list_head *down_list)
1381 {
1382 int power;
1383
1384 switch (w->id) {
1385 case snd_soc_dapm_pre:
1386 dapm_seq_insert(w, down_list, false);
1387 break;
1388 case snd_soc_dapm_post:
1389 dapm_seq_insert(w, up_list, true);
1390 break;
1391
1392 default:
1393 power = dapm_widget_power_check(w);
1394
1395 dapm_widget_set_power(w, power, up_list, down_list);
1396 break;
1397 }
1398 }
1399
1400 /*
1401 * Scan each dapm widget for complete audio path.
1402 * A complete path is a route that has valid endpoints i.e.:-
1403 *
1404 * o DAC to output pin.
1405 * o Input Pin to ADC.
1406 * o Input pin to Output pin (bypass, sidetone)
1407 * o DAC to ADC (loopback).
1408 */
1409 static int dapm_power_widgets(struct snd_soc_dapm_context *dapm, int event)
1410 {
1411 struct snd_soc_card *card = dapm->card;
1412 struct snd_soc_dapm_widget *w;
1413 struct snd_soc_dapm_context *d;
1414 LIST_HEAD(up_list);
1415 LIST_HEAD(down_list);
1416 LIST_HEAD(async_domain);
1417 enum snd_soc_bias_level bias;
1418
1419 trace_snd_soc_dapm_start(card);
1420
1421 list_for_each_entry(d, &card->dapm_list, list) {
1422 if (d->n_widgets || d->codec == NULL) {
1423 if (d->idle_bias_off)
1424 d->target_bias_level = SND_SOC_BIAS_OFF;
1425 else
1426 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1427 }
1428 }
1429
1430 dapm_reset(card);
1431
1432 /* Check which widgets we need to power and store them in
1433 * lists indicating if they should be powered up or down. We
1434 * only check widgets that have been flagged as dirty but note
1435 * that new widgets may be added to the dirty list while we
1436 * iterate.
1437 */
1438 list_for_each_entry(w, &card->dapm_dirty, dirty) {
1439 dapm_power_one_widget(w, &up_list, &down_list);
1440 }
1441
1442 list_for_each_entry(w, &card->widgets, list) {
1443 list_del_init(&w->dirty);
1444
1445 if (w->power) {
1446 d = w->dapm;
1447
1448 /* Supplies and micbiases only bring the
1449 * context up to STANDBY as unless something
1450 * else is active and passing audio they
1451 * generally don't require full power. Signal
1452 * generators are virtual pins and have no
1453 * power impact themselves.
1454 */
1455 switch (w->id) {
1456 case snd_soc_dapm_siggen:
1457 break;
1458 case snd_soc_dapm_supply:
1459 case snd_soc_dapm_regulator_supply:
1460 case snd_soc_dapm_micbias:
1461 if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
1462 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1463 break;
1464 default:
1465 d->target_bias_level = SND_SOC_BIAS_ON;
1466 break;
1467 }
1468 }
1469
1470 }
1471
1472 /* If there are no DAPM widgets then try to figure out power from the
1473 * event type.
1474 */
1475 if (!dapm->n_widgets) {
1476 switch (event) {
1477 case SND_SOC_DAPM_STREAM_START:
1478 case SND_SOC_DAPM_STREAM_RESUME:
1479 dapm->target_bias_level = SND_SOC_BIAS_ON;
1480 break;
1481 case SND_SOC_DAPM_STREAM_STOP:
1482 if (dapm->codec && dapm->codec->active)
1483 dapm->target_bias_level = SND_SOC_BIAS_ON;
1484 else
1485 dapm->target_bias_level = SND_SOC_BIAS_STANDBY;
1486 break;
1487 case SND_SOC_DAPM_STREAM_SUSPEND:
1488 dapm->target_bias_level = SND_SOC_BIAS_STANDBY;
1489 break;
1490 case SND_SOC_DAPM_STREAM_NOP:
1491 dapm->target_bias_level = dapm->bias_level;
1492 break;
1493 default:
1494 break;
1495 }
1496 }
1497
1498 /* Force all contexts in the card to the same bias state if
1499 * they're not ground referenced.
1500 */
1501 bias = SND_SOC_BIAS_OFF;
1502 list_for_each_entry(d, &card->dapm_list, list)
1503 if (d->target_bias_level > bias)
1504 bias = d->target_bias_level;
1505 list_for_each_entry(d, &card->dapm_list, list)
1506 if (!d->idle_bias_off)
1507 d->target_bias_level = bias;
1508
1509 trace_snd_soc_dapm_walk_done(card);
1510
1511 /* Run all the bias changes in parallel */
1512 list_for_each_entry(d, &dapm->card->dapm_list, list)
1513 async_schedule_domain(dapm_pre_sequence_async, d,
1514 &async_domain);
1515 async_synchronize_full_domain(&async_domain);
1516
1517 /* Power down widgets first; try to avoid amplifying pops. */
1518 dapm_seq_run(dapm, &down_list, event, false);
1519
1520 dapm_widget_update(dapm);
1521
1522 /* Now power up. */
1523 dapm_seq_run(dapm, &up_list, event, true);
1524
1525 /* Run all the bias changes in parallel */
1526 list_for_each_entry(d, &dapm->card->dapm_list, list)
1527 async_schedule_domain(dapm_post_sequence_async, d,
1528 &async_domain);
1529 async_synchronize_full_domain(&async_domain);
1530
1531 /* do we need to notify any clients that DAPM event is complete */
1532 list_for_each_entry(d, &card->dapm_list, list) {
1533 if (d->stream_event)
1534 d->stream_event(d, event);
1535 }
1536
1537 pop_dbg(dapm->dev, card->pop_time,
1538 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
1539 pop_wait(card->pop_time);
1540
1541 trace_snd_soc_dapm_done(card);
1542
1543 return 0;
1544 }
1545
1546 #ifdef CONFIG_DEBUG_FS
1547 static int dapm_widget_power_open_file(struct inode *inode, struct file *file)
1548 {
1549 file->private_data = inode->i_private;
1550 return 0;
1551 }
1552
1553 static ssize_t dapm_widget_power_read_file(struct file *file,
1554 char __user *user_buf,
1555 size_t count, loff_t *ppos)
1556 {
1557 struct snd_soc_dapm_widget *w = file->private_data;
1558 char *buf;
1559 int in, out;
1560 ssize_t ret;
1561 struct snd_soc_dapm_path *p = NULL;
1562
1563 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1564 if (!buf)
1565 return -ENOMEM;
1566
1567 in = is_connected_input_ep(w);
1568 dapm_clear_walk(w->dapm);
1569 out = is_connected_output_ep(w);
1570 dapm_clear_walk(w->dapm);
1571
1572 ret = snprintf(buf, PAGE_SIZE, "%s: %s%s in %d out %d",
1573 w->name, w->power ? "On" : "Off",
1574 w->force ? " (forced)" : "", in, out);
1575
1576 if (w->reg >= 0)
1577 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1578 " - R%d(0x%x) bit %d",
1579 w->reg, w->reg, w->shift);
1580
1581 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1582
1583 if (w->sname)
1584 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1585 w->sname,
1586 w->active ? "active" : "inactive");
1587
1588 list_for_each_entry(p, &w->sources, list_sink) {
1589 if (p->connected && !p->connected(w, p->sink))
1590 continue;
1591
1592 if (p->connect)
1593 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1594 " in \"%s\" \"%s\"\n",
1595 p->name ? p->name : "static",
1596 p->source->name);
1597 }
1598 list_for_each_entry(p, &w->sinks, list_source) {
1599 if (p->connected && !p->connected(w, p->sink))
1600 continue;
1601
1602 if (p->connect)
1603 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1604 " out \"%s\" \"%s\"\n",
1605 p->name ? p->name : "static",
1606 p->sink->name);
1607 }
1608
1609 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1610
1611 kfree(buf);
1612 return ret;
1613 }
1614
1615 static const struct file_operations dapm_widget_power_fops = {
1616 .open = dapm_widget_power_open_file,
1617 .read = dapm_widget_power_read_file,
1618 .llseek = default_llseek,
1619 };
1620
1621 static int dapm_bias_open_file(struct inode *inode, struct file *file)
1622 {
1623 file->private_data = inode->i_private;
1624 return 0;
1625 }
1626
1627 static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
1628 size_t count, loff_t *ppos)
1629 {
1630 struct snd_soc_dapm_context *dapm = file->private_data;
1631 char *level;
1632
1633 switch (dapm->bias_level) {
1634 case SND_SOC_BIAS_ON:
1635 level = "On\n";
1636 break;
1637 case SND_SOC_BIAS_PREPARE:
1638 level = "Prepare\n";
1639 break;
1640 case SND_SOC_BIAS_STANDBY:
1641 level = "Standby\n";
1642 break;
1643 case SND_SOC_BIAS_OFF:
1644 level = "Off\n";
1645 break;
1646 default:
1647 BUG();
1648 level = "Unknown\n";
1649 break;
1650 }
1651
1652 return simple_read_from_buffer(user_buf, count, ppos, level,
1653 strlen(level));
1654 }
1655
1656 static const struct file_operations dapm_bias_fops = {
1657 .open = dapm_bias_open_file,
1658 .read = dapm_bias_read_file,
1659 .llseek = default_llseek,
1660 };
1661
1662 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1663 struct dentry *parent)
1664 {
1665 struct dentry *d;
1666
1667 dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
1668
1669 if (!dapm->debugfs_dapm) {
1670 dev_warn(dapm->dev,
1671 "Failed to create DAPM debugfs directory\n");
1672 return;
1673 }
1674
1675 d = debugfs_create_file("bias_level", 0444,
1676 dapm->debugfs_dapm, dapm,
1677 &dapm_bias_fops);
1678 if (!d)
1679 dev_warn(dapm->dev,
1680 "ASoC: Failed to create bias level debugfs file\n");
1681 }
1682
1683 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1684 {
1685 struct snd_soc_dapm_context *dapm = w->dapm;
1686 struct dentry *d;
1687
1688 if (!dapm->debugfs_dapm || !w->name)
1689 return;
1690
1691 d = debugfs_create_file(w->name, 0444,
1692 dapm->debugfs_dapm, w,
1693 &dapm_widget_power_fops);
1694 if (!d)
1695 dev_warn(w->dapm->dev,
1696 "ASoC: Failed to create %s debugfs file\n",
1697 w->name);
1698 }
1699
1700 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1701 {
1702 debugfs_remove_recursive(dapm->debugfs_dapm);
1703 }
1704
1705 #else
1706 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1707 struct dentry *parent)
1708 {
1709 }
1710
1711 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1712 {
1713 }
1714
1715 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1716 {
1717 }
1718
1719 #endif
1720
1721 /* test and update the power status of a mux widget */
1722 static int soc_dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1723 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e)
1724 {
1725 struct snd_soc_dapm_path *path;
1726 int found = 0;
1727
1728 if (widget->id != snd_soc_dapm_mux &&
1729 widget->id != snd_soc_dapm_virt_mux &&
1730 widget->id != snd_soc_dapm_value_mux)
1731 return -ENODEV;
1732
1733 /* find dapm widget path assoc with kcontrol */
1734 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1735 if (path->kcontrol != kcontrol)
1736 continue;
1737
1738 if (!path->name || !e->texts[mux])
1739 continue;
1740
1741 found = 1;
1742 /* we now need to match the string in the enum to the path */
1743 if (!(strcmp(path->name, e->texts[mux]))) {
1744 path->connect = 1; /* new connection */
1745 dapm_mark_dirty(path->source, "mux connection");
1746 } else {
1747 if (path->connect)
1748 dapm_mark_dirty(path->source,
1749 "mux disconnection");
1750 path->connect = 0; /* old connection must be powered down */
1751 }
1752 }
1753
1754 if (found) {
1755 dapm_mark_dirty(widget, "mux change");
1756 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1757 }
1758
1759 return 0;
1760 }
1761
1762 int snd_soc_dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1763 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e)
1764 {
1765 struct snd_soc_card *card = widget->dapm->card;
1766 int ret;
1767
1768 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
1769 ret = soc_dapm_mux_update_power(widget, kcontrol, mux, e);
1770 mutex_unlock(&card->dapm_mutex);
1771 return ret;
1772 }
1773 EXPORT_SYMBOL_GPL(snd_soc_dapm_mux_update_power);
1774
1775 /* test and update the power status of a mixer or switch widget */
1776 static int soc_dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1777 struct snd_kcontrol *kcontrol, int connect)
1778 {
1779 struct snd_soc_dapm_path *path;
1780 int found = 0;
1781
1782 if (widget->id != snd_soc_dapm_mixer &&
1783 widget->id != snd_soc_dapm_mixer_named_ctl &&
1784 widget->id != snd_soc_dapm_switch)
1785 return -ENODEV;
1786
1787 /* find dapm widget path assoc with kcontrol */
1788 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1789 if (path->kcontrol != kcontrol)
1790 continue;
1791
1792 /* found, now check type */
1793 found = 1;
1794 path->connect = connect;
1795 dapm_mark_dirty(path->source, "mixer connection");
1796 }
1797
1798 if (found) {
1799 dapm_mark_dirty(widget, "mixer update");
1800 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1801 }
1802
1803 return 0;
1804 }
1805
1806 int snd_soc_dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1807 struct snd_kcontrol *kcontrol, int connect)
1808 {
1809 struct snd_soc_card *card = widget->dapm->card;
1810 int ret;
1811
1812 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
1813 ret = soc_dapm_mixer_update_power(widget, kcontrol, connect);
1814 mutex_unlock(&card->dapm_mutex);
1815 return ret;
1816 }
1817 EXPORT_SYMBOL_GPL(snd_soc_dapm_mixer_update_power);
1818
1819 /* show dapm widget status in sys fs */
1820 static ssize_t dapm_widget_show(struct device *dev,
1821 struct device_attribute *attr, char *buf)
1822 {
1823 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
1824 struct snd_soc_codec *codec =rtd->codec;
1825 struct snd_soc_dapm_widget *w;
1826 int count = 0;
1827 char *state = "not set";
1828
1829 list_for_each_entry(w, &codec->card->widgets, list) {
1830 if (w->dapm != &codec->dapm)
1831 continue;
1832
1833 /* only display widgets that burnm power */
1834 switch (w->id) {
1835 case snd_soc_dapm_hp:
1836 case snd_soc_dapm_mic:
1837 case snd_soc_dapm_spk:
1838 case snd_soc_dapm_line:
1839 case snd_soc_dapm_micbias:
1840 case snd_soc_dapm_dac:
1841 case snd_soc_dapm_adc:
1842 case snd_soc_dapm_pga:
1843 case snd_soc_dapm_out_drv:
1844 case snd_soc_dapm_mixer:
1845 case snd_soc_dapm_mixer_named_ctl:
1846 case snd_soc_dapm_supply:
1847 case snd_soc_dapm_regulator_supply:
1848 if (w->name)
1849 count += sprintf(buf + count, "%s: %s\n",
1850 w->name, w->power ? "On":"Off");
1851 break;
1852 default:
1853 break;
1854 }
1855 }
1856
1857 switch (codec->dapm.bias_level) {
1858 case SND_SOC_BIAS_ON:
1859 state = "On";
1860 break;
1861 case SND_SOC_BIAS_PREPARE:
1862 state = "Prepare";
1863 break;
1864 case SND_SOC_BIAS_STANDBY:
1865 state = "Standby";
1866 break;
1867 case SND_SOC_BIAS_OFF:
1868 state = "Off";
1869 break;
1870 }
1871 count += sprintf(buf + count, "PM State: %s\n", state);
1872
1873 return count;
1874 }
1875
1876 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
1877
1878 int snd_soc_dapm_sys_add(struct device *dev)
1879 {
1880 return device_create_file(dev, &dev_attr_dapm_widget);
1881 }
1882
1883 static void snd_soc_dapm_sys_remove(struct device *dev)
1884 {
1885 device_remove_file(dev, &dev_attr_dapm_widget);
1886 }
1887
1888 /* free all dapm widgets and resources */
1889 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
1890 {
1891 struct snd_soc_dapm_widget *w, *next_w;
1892 struct snd_soc_dapm_path *p, *next_p;
1893
1894 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
1895 if (w->dapm != dapm)
1896 continue;
1897 list_del(&w->list);
1898 /*
1899 * remove source and sink paths associated to this widget.
1900 * While removing the path, remove reference to it from both
1901 * source and sink widgets so that path is removed only once.
1902 */
1903 list_for_each_entry_safe(p, next_p, &w->sources, list_sink) {
1904 list_del(&p->list_sink);
1905 list_del(&p->list_source);
1906 list_del(&p->list);
1907 kfree(p->long_name);
1908 kfree(p);
1909 }
1910 list_for_each_entry_safe(p, next_p, &w->sinks, list_source) {
1911 list_del(&p->list_sink);
1912 list_del(&p->list_source);
1913 list_del(&p->list);
1914 kfree(p->long_name);
1915 kfree(p);
1916 }
1917 kfree(w->kcontrols);
1918 kfree(w->name);
1919 kfree(w);
1920 }
1921 }
1922
1923 static struct snd_soc_dapm_widget *dapm_find_widget(
1924 struct snd_soc_dapm_context *dapm, const char *pin,
1925 bool search_other_contexts)
1926 {
1927 struct snd_soc_dapm_widget *w;
1928 struct snd_soc_dapm_widget *fallback = NULL;
1929
1930 list_for_each_entry(w, &dapm->card->widgets, list) {
1931 if (!strcmp(w->name, pin)) {
1932 if (w->dapm == dapm)
1933 return w;
1934 else
1935 fallback = w;
1936 }
1937 }
1938
1939 if (search_other_contexts)
1940 return fallback;
1941
1942 return NULL;
1943 }
1944
1945 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
1946 const char *pin, int status)
1947 {
1948 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
1949
1950 if (!w) {
1951 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
1952 return -EINVAL;
1953 }
1954
1955 if (w->connected != status)
1956 dapm_mark_dirty(w, "pin configuration");
1957
1958 w->connected = status;
1959 if (status == 0)
1960 w->force = 0;
1961
1962 return 0;
1963 }
1964
1965 /**
1966 * snd_soc_dapm_sync - scan and power dapm paths
1967 * @dapm: DAPM context
1968 *
1969 * Walks all dapm audio paths and powers widgets according to their
1970 * stream or path usage.
1971 *
1972 * Returns 0 for success.
1973 */
1974 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
1975 {
1976 int ret;
1977
1978 /*
1979 * Suppress early reports (eg, jacks syncing their state) to avoid
1980 * silly DAPM runs during card startup.
1981 */
1982 if (!dapm->card || !dapm->card->instantiated)
1983 return 0;
1984
1985 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
1986 ret = dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
1987 mutex_unlock(&dapm->card->dapm_mutex);
1988 return ret;
1989 }
1990 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
1991
1992 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
1993 const struct snd_soc_dapm_route *route)
1994 {
1995 struct snd_soc_dapm_path *path;
1996 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
1997 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
1998 const char *sink;
1999 const char *control = route->control;
2000 const char *source;
2001 char prefixed_sink[80];
2002 char prefixed_source[80];
2003 int ret = 0;
2004
2005 if (dapm->codec && dapm->codec->name_prefix) {
2006 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
2007 dapm->codec->name_prefix, route->sink);
2008 sink = prefixed_sink;
2009 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
2010 dapm->codec->name_prefix, route->source);
2011 source = prefixed_source;
2012 } else {
2013 sink = route->sink;
2014 source = route->source;
2015 }
2016
2017 /*
2018 * find src and dest widgets over all widgets but favor a widget from
2019 * current DAPM context
2020 */
2021 list_for_each_entry(w, &dapm->card->widgets, list) {
2022 if (!wsink && !(strcmp(w->name, sink))) {
2023 wtsink = w;
2024 if (w->dapm == dapm)
2025 wsink = w;
2026 continue;
2027 }
2028 if (!wsource && !(strcmp(w->name, source))) {
2029 wtsource = w;
2030 if (w->dapm == dapm)
2031 wsource = w;
2032 }
2033 }
2034 /* use widget from another DAPM context if not found from this */
2035 if (!wsink)
2036 wsink = wtsink;
2037 if (!wsource)
2038 wsource = wtsource;
2039
2040 if (wsource == NULL || wsink == NULL)
2041 return -ENODEV;
2042
2043 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
2044 if (!path)
2045 return -ENOMEM;
2046
2047 path->source = wsource;
2048 path->sink = wsink;
2049 path->connected = route->connected;
2050 INIT_LIST_HEAD(&path->list);
2051 INIT_LIST_HEAD(&path->list_source);
2052 INIT_LIST_HEAD(&path->list_sink);
2053
2054 /* check for external widgets */
2055 if (wsink->id == snd_soc_dapm_input) {
2056 if (wsource->id == snd_soc_dapm_micbias ||
2057 wsource->id == snd_soc_dapm_mic ||
2058 wsource->id == snd_soc_dapm_line ||
2059 wsource->id == snd_soc_dapm_output)
2060 wsink->ext = 1;
2061 }
2062 if (wsource->id == snd_soc_dapm_output) {
2063 if (wsink->id == snd_soc_dapm_spk ||
2064 wsink->id == snd_soc_dapm_hp ||
2065 wsink->id == snd_soc_dapm_line ||
2066 wsink->id == snd_soc_dapm_input)
2067 wsource->ext = 1;
2068 }
2069
2070 /* connect static paths */
2071 if (control == NULL) {
2072 list_add(&path->list, &dapm->card->paths);
2073 list_add(&path->list_sink, &wsink->sources);
2074 list_add(&path->list_source, &wsource->sinks);
2075 path->connect = 1;
2076 return 0;
2077 }
2078
2079 /* connect dynamic paths */
2080 switch (wsink->id) {
2081 case snd_soc_dapm_adc:
2082 case snd_soc_dapm_dac:
2083 case snd_soc_dapm_pga:
2084 case snd_soc_dapm_out_drv:
2085 case snd_soc_dapm_input:
2086 case snd_soc_dapm_output:
2087 case snd_soc_dapm_siggen:
2088 case snd_soc_dapm_micbias:
2089 case snd_soc_dapm_vmid:
2090 case snd_soc_dapm_pre:
2091 case snd_soc_dapm_post:
2092 case snd_soc_dapm_supply:
2093 case snd_soc_dapm_regulator_supply:
2094 case snd_soc_dapm_aif_in:
2095 case snd_soc_dapm_aif_out:
2096 case snd_soc_dapm_dai:
2097 list_add(&path->list, &dapm->card->paths);
2098 list_add(&path->list_sink, &wsink->sources);
2099 list_add(&path->list_source, &wsource->sinks);
2100 path->connect = 1;
2101 return 0;
2102 case snd_soc_dapm_mux:
2103 case snd_soc_dapm_virt_mux:
2104 case snd_soc_dapm_value_mux:
2105 ret = dapm_connect_mux(dapm, wsource, wsink, path, control,
2106 &wsink->kcontrol_news[0]);
2107 if (ret != 0)
2108 goto err;
2109 break;
2110 case snd_soc_dapm_switch:
2111 case snd_soc_dapm_mixer:
2112 case snd_soc_dapm_mixer_named_ctl:
2113 ret = dapm_connect_mixer(dapm, wsource, wsink, path, control);
2114 if (ret != 0)
2115 goto err;
2116 break;
2117 case snd_soc_dapm_hp:
2118 case snd_soc_dapm_mic:
2119 case snd_soc_dapm_line:
2120 case snd_soc_dapm_spk:
2121 list_add(&path->list, &dapm->card->paths);
2122 list_add(&path->list_sink, &wsink->sources);
2123 list_add(&path->list_source, &wsource->sinks);
2124 path->connect = 0;
2125 return 0;
2126 }
2127 return 0;
2128
2129 err:
2130 dev_warn(dapm->dev, "asoc: no dapm match for %s --> %s --> %s\n",
2131 source, control, sink);
2132 kfree(path);
2133 return ret;
2134 }
2135
2136 /**
2137 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
2138 * @dapm: DAPM context
2139 * @route: audio routes
2140 * @num: number of routes
2141 *
2142 * Connects 2 dapm widgets together via a named audio path. The sink is
2143 * the widget receiving the audio signal, whilst the source is the sender
2144 * of the audio signal.
2145 *
2146 * Returns 0 for success else error. On error all resources can be freed
2147 * with a call to snd_soc_card_free().
2148 */
2149 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
2150 const struct snd_soc_dapm_route *route, int num)
2151 {
2152 int i, ret;
2153
2154 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2155 for (i = 0; i < num; i++) {
2156 ret = snd_soc_dapm_add_route(dapm, route);
2157 if (ret < 0) {
2158 dev_err(dapm->dev, "Failed to add route %s->%s\n",
2159 route->source, route->sink);
2160 return ret;
2161 }
2162 route++;
2163 }
2164 mutex_unlock(&dapm->card->dapm_mutex);
2165
2166 return 0;
2167 }
2168 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
2169
2170 static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm,
2171 const struct snd_soc_dapm_route *route)
2172 {
2173 struct snd_soc_dapm_widget *source = dapm_find_widget(dapm,
2174 route->source,
2175 true);
2176 struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm,
2177 route->sink,
2178 true);
2179 struct snd_soc_dapm_path *path;
2180 int count = 0;
2181
2182 if (!source) {
2183 dev_err(dapm->dev, "Unable to find source %s for weak route\n",
2184 route->source);
2185 return -ENODEV;
2186 }
2187
2188 if (!sink) {
2189 dev_err(dapm->dev, "Unable to find sink %s for weak route\n",
2190 route->sink);
2191 return -ENODEV;
2192 }
2193
2194 if (route->control || route->connected)
2195 dev_warn(dapm->dev, "Ignoring control for weak route %s->%s\n",
2196 route->source, route->sink);
2197
2198 list_for_each_entry(path, &source->sinks, list_source) {
2199 if (path->sink == sink) {
2200 path->weak = 1;
2201 count++;
2202 }
2203 }
2204
2205 if (count == 0)
2206 dev_err(dapm->dev, "No path found for weak route %s->%s\n",
2207 route->source, route->sink);
2208 if (count > 1)
2209 dev_warn(dapm->dev, "%d paths found for weak route %s->%s\n",
2210 count, route->source, route->sink);
2211
2212 return 0;
2213 }
2214
2215 /**
2216 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
2217 * @dapm: DAPM context
2218 * @route: audio routes
2219 * @num: number of routes
2220 *
2221 * Mark existing routes matching those specified in the passed array
2222 * as being weak, meaning that they are ignored for the purpose of
2223 * power decisions. The main intended use case is for sidetone paths
2224 * which couple audio between other independent paths if they are both
2225 * active in order to make the combination work better at the user
2226 * level but which aren't intended to be "used".
2227 *
2228 * Note that CODEC drivers should not use this as sidetone type paths
2229 * can frequently also be used as bypass paths.
2230 */
2231 int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm,
2232 const struct snd_soc_dapm_route *route, int num)
2233 {
2234 int i, err;
2235 int ret = 0;
2236
2237 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2238 for (i = 0; i < num; i++) {
2239 err = snd_soc_dapm_weak_route(dapm, route);
2240 if (err)
2241 ret = err;
2242 route++;
2243 }
2244 mutex_unlock(&dapm->card->dapm_mutex);
2245
2246 return ret;
2247 }
2248 EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes);
2249
2250 /**
2251 * snd_soc_dapm_new_widgets - add new dapm widgets
2252 * @dapm: DAPM context
2253 *
2254 * Checks the codec for any new dapm widgets and creates them if found.
2255 *
2256 * Returns 0 for success.
2257 */
2258 int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context *dapm)
2259 {
2260 struct snd_soc_dapm_widget *w;
2261 unsigned int val;
2262
2263 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2264
2265 list_for_each_entry(w, &dapm->card->widgets, list)
2266 {
2267 if (w->new)
2268 continue;
2269
2270 if (w->num_kcontrols) {
2271 w->kcontrols = kzalloc(w->num_kcontrols *
2272 sizeof(struct snd_kcontrol *),
2273 GFP_KERNEL);
2274 if (!w->kcontrols) {
2275 mutex_unlock(&dapm->card->dapm_mutex);
2276 return -ENOMEM;
2277 }
2278 }
2279
2280 switch(w->id) {
2281 case snd_soc_dapm_switch:
2282 case snd_soc_dapm_mixer:
2283 case snd_soc_dapm_mixer_named_ctl:
2284 dapm_new_mixer(w);
2285 break;
2286 case snd_soc_dapm_mux:
2287 case snd_soc_dapm_virt_mux:
2288 case snd_soc_dapm_value_mux:
2289 dapm_new_mux(w);
2290 break;
2291 case snd_soc_dapm_pga:
2292 case snd_soc_dapm_out_drv:
2293 dapm_new_pga(w);
2294 break;
2295 default:
2296 break;
2297 }
2298
2299 /* Read the initial power state from the device */
2300 if (w->reg >= 0) {
2301 val = soc_widget_read(w, w->reg);
2302 val &= 1 << w->shift;
2303 if (w->invert)
2304 val = !val;
2305
2306 if (val)
2307 w->power = 1;
2308 }
2309
2310 w->new = 1;
2311
2312 dapm_mark_dirty(w, "new widget");
2313 dapm_debugfs_add_widget(w);
2314 }
2315
2316 dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
2317 mutex_unlock(&dapm->card->dapm_mutex);
2318 return 0;
2319 }
2320 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
2321
2322 /**
2323 * snd_soc_dapm_get_volsw - dapm mixer get callback
2324 * @kcontrol: mixer control
2325 * @ucontrol: control element information
2326 *
2327 * Callback to get the value of a dapm mixer control.
2328 *
2329 * Returns 0 for success.
2330 */
2331 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
2332 struct snd_ctl_elem_value *ucontrol)
2333 {
2334 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2335 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2336 struct soc_mixer_control *mc =
2337 (struct soc_mixer_control *)kcontrol->private_value;
2338 unsigned int reg = mc->reg;
2339 unsigned int shift = mc->shift;
2340 unsigned int rshift = mc->rshift;
2341 int max = mc->max;
2342 unsigned int invert = mc->invert;
2343 unsigned int mask = (1 << fls(max)) - 1;
2344
2345 ucontrol->value.integer.value[0] =
2346 (snd_soc_read(widget->codec, reg) >> shift) & mask;
2347 if (shift != rshift)
2348 ucontrol->value.integer.value[1] =
2349 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
2350 if (invert) {
2351 ucontrol->value.integer.value[0] =
2352 max - ucontrol->value.integer.value[0];
2353 if (shift != rshift)
2354 ucontrol->value.integer.value[1] =
2355 max - ucontrol->value.integer.value[1];
2356 }
2357
2358 return 0;
2359 }
2360 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
2361
2362 /**
2363 * snd_soc_dapm_put_volsw - dapm mixer set callback
2364 * @kcontrol: mixer control
2365 * @ucontrol: control element information
2366 *
2367 * Callback to set the value of a dapm mixer control.
2368 *
2369 * Returns 0 for success.
2370 */
2371 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
2372 struct snd_ctl_elem_value *ucontrol)
2373 {
2374 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2375 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2376 struct snd_soc_codec *codec = widget->codec;
2377 struct snd_soc_card *card = codec->card;
2378 struct soc_mixer_control *mc =
2379 (struct soc_mixer_control *)kcontrol->private_value;
2380 unsigned int reg = mc->reg;
2381 unsigned int shift = mc->shift;
2382 int max = mc->max;
2383 unsigned int mask = (1 << fls(max)) - 1;
2384 unsigned int invert = mc->invert;
2385 unsigned int val;
2386 int connect, change;
2387 struct snd_soc_dapm_update update;
2388 int wi;
2389
2390 val = (ucontrol->value.integer.value[0] & mask);
2391
2392 if (invert)
2393 val = max - val;
2394 mask = mask << shift;
2395 val = val << shift;
2396
2397 if (val)
2398 /* new connection */
2399 connect = invert ? 0 : 1;
2400 else
2401 /* old connection must be powered down */
2402 connect = invert ? 1 : 0;
2403
2404 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2405
2406 change = snd_soc_test_bits(widget->codec, reg, mask, val);
2407 if (change) {
2408 for (wi = 0; wi < wlist->num_widgets; wi++) {
2409 widget = wlist->widgets[wi];
2410
2411 widget->value = val;
2412
2413 update.kcontrol = kcontrol;
2414 update.widget = widget;
2415 update.reg = reg;
2416 update.mask = mask;
2417 update.val = val;
2418 widget->dapm->update = &update;
2419
2420 soc_dapm_mixer_update_power(widget, kcontrol, connect);
2421
2422 widget->dapm->update = NULL;
2423 }
2424 }
2425
2426 mutex_unlock(&card->dapm_mutex);
2427 return 0;
2428 }
2429 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
2430
2431 /**
2432 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
2433 * @kcontrol: mixer control
2434 * @ucontrol: control element information
2435 *
2436 * Callback to get the value of a dapm enumerated double mixer control.
2437 *
2438 * Returns 0 for success.
2439 */
2440 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
2441 struct snd_ctl_elem_value *ucontrol)
2442 {
2443 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2444 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2445 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2446 unsigned int val, bitmask;
2447
2448 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2449 ;
2450 val = snd_soc_read(widget->codec, e->reg);
2451 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
2452 if (e->shift_l != e->shift_r)
2453 ucontrol->value.enumerated.item[1] =
2454 (val >> e->shift_r) & (bitmask - 1);
2455
2456 return 0;
2457 }
2458 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
2459
2460 /**
2461 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
2462 * @kcontrol: mixer control
2463 * @ucontrol: control element information
2464 *
2465 * Callback to set the value of a dapm enumerated double mixer control.
2466 *
2467 * Returns 0 for success.
2468 */
2469 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
2470 struct snd_ctl_elem_value *ucontrol)
2471 {
2472 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2473 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2474 struct snd_soc_codec *codec = widget->codec;
2475 struct snd_soc_card *card = codec->card;
2476 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2477 unsigned int val, mux, change;
2478 unsigned int mask, bitmask;
2479 struct snd_soc_dapm_update update;
2480 int wi;
2481
2482 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2483 ;
2484 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2485 return -EINVAL;
2486 mux = ucontrol->value.enumerated.item[0];
2487 val = mux << e->shift_l;
2488 mask = (bitmask - 1) << e->shift_l;
2489 if (e->shift_l != e->shift_r) {
2490 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2491 return -EINVAL;
2492 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2493 mask |= (bitmask - 1) << e->shift_r;
2494 }
2495
2496 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2497
2498 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2499 if (change) {
2500 for (wi = 0; wi < wlist->num_widgets; wi++) {
2501 widget = wlist->widgets[wi];
2502
2503 widget->value = val;
2504
2505 update.kcontrol = kcontrol;
2506 update.widget = widget;
2507 update.reg = e->reg;
2508 update.mask = mask;
2509 update.val = val;
2510 widget->dapm->update = &update;
2511
2512 soc_dapm_mux_update_power(widget, kcontrol, mux, e);
2513
2514 widget->dapm->update = NULL;
2515 }
2516 }
2517
2518 mutex_unlock(&card->dapm_mutex);
2519 return change;
2520 }
2521 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
2522
2523 /**
2524 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
2525 * @kcontrol: mixer control
2526 * @ucontrol: control element information
2527 *
2528 * Returns 0 for success.
2529 */
2530 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
2531 struct snd_ctl_elem_value *ucontrol)
2532 {
2533 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2534 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2535
2536 ucontrol->value.enumerated.item[0] = widget->value;
2537
2538 return 0;
2539 }
2540 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt);
2541
2542 /**
2543 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
2544 * @kcontrol: mixer control
2545 * @ucontrol: control element information
2546 *
2547 * Returns 0 for success.
2548 */
2549 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
2550 struct snd_ctl_elem_value *ucontrol)
2551 {
2552 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2553 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2554 struct snd_soc_codec *codec = widget->codec;
2555 struct snd_soc_card *card = codec->card;
2556 struct soc_enum *e =
2557 (struct soc_enum *)kcontrol->private_value;
2558 int change;
2559 int ret = 0;
2560 int wi;
2561
2562 if (ucontrol->value.enumerated.item[0] >= e->max)
2563 return -EINVAL;
2564
2565 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2566
2567 change = widget->value != ucontrol->value.enumerated.item[0];
2568 if (change) {
2569 for (wi = 0; wi < wlist->num_widgets; wi++) {
2570 widget = wlist->widgets[wi];
2571
2572 widget->value = ucontrol->value.enumerated.item[0];
2573
2574 soc_dapm_mux_update_power(widget, kcontrol, widget->value, e);
2575 }
2576 }
2577
2578 mutex_unlock(&card->dapm_mutex);
2579 return ret;
2580 }
2581 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt);
2582
2583 /**
2584 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
2585 * callback
2586 * @kcontrol: mixer control
2587 * @ucontrol: control element information
2588 *
2589 * Callback to get the value of a dapm semi enumerated double mixer control.
2590 *
2591 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2592 * used for handling bitfield coded enumeration for example.
2593 *
2594 * Returns 0 for success.
2595 */
2596 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
2597 struct snd_ctl_elem_value *ucontrol)
2598 {
2599 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2600 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2601 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2602 unsigned int reg_val, val, mux;
2603
2604 reg_val = snd_soc_read(widget->codec, e->reg);
2605 val = (reg_val >> e->shift_l) & e->mask;
2606 for (mux = 0; mux < e->max; mux++) {
2607 if (val == e->values[mux])
2608 break;
2609 }
2610 ucontrol->value.enumerated.item[0] = mux;
2611 if (e->shift_l != e->shift_r) {
2612 val = (reg_val >> e->shift_r) & e->mask;
2613 for (mux = 0; mux < e->max; mux++) {
2614 if (val == e->values[mux])
2615 break;
2616 }
2617 ucontrol->value.enumerated.item[1] = mux;
2618 }
2619
2620 return 0;
2621 }
2622 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
2623
2624 /**
2625 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
2626 * callback
2627 * @kcontrol: mixer control
2628 * @ucontrol: control element information
2629 *
2630 * Callback to set the value of a dapm semi enumerated double mixer control.
2631 *
2632 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2633 * used for handling bitfield coded enumeration for example.
2634 *
2635 * Returns 0 for success.
2636 */
2637 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
2638 struct snd_ctl_elem_value *ucontrol)
2639 {
2640 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2641 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2642 struct snd_soc_codec *codec = widget->codec;
2643 struct snd_soc_card *card = codec->card;
2644 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2645 unsigned int val, mux, change;
2646 unsigned int mask;
2647 struct snd_soc_dapm_update update;
2648 int wi;
2649
2650 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2651 return -EINVAL;
2652 mux = ucontrol->value.enumerated.item[0];
2653 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2654 mask = e->mask << e->shift_l;
2655 if (e->shift_l != e->shift_r) {
2656 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2657 return -EINVAL;
2658 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2659 mask |= e->mask << e->shift_r;
2660 }
2661
2662 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2663
2664 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2665 if (change) {
2666 for (wi = 0; wi < wlist->num_widgets; wi++) {
2667 widget = wlist->widgets[wi];
2668
2669 widget->value = val;
2670
2671 update.kcontrol = kcontrol;
2672 update.widget = widget;
2673 update.reg = e->reg;
2674 update.mask = mask;
2675 update.val = val;
2676 widget->dapm->update = &update;
2677
2678 soc_dapm_mux_update_power(widget, kcontrol, mux, e);
2679
2680 widget->dapm->update = NULL;
2681 }
2682 }
2683
2684 mutex_unlock(&card->dapm_mutex);
2685 return change;
2686 }
2687 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
2688
2689 /**
2690 * snd_soc_dapm_info_pin_switch - Info for a pin switch
2691 *
2692 * @kcontrol: mixer control
2693 * @uinfo: control element information
2694 *
2695 * Callback to provide information about a pin switch control.
2696 */
2697 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
2698 struct snd_ctl_elem_info *uinfo)
2699 {
2700 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2701 uinfo->count = 1;
2702 uinfo->value.integer.min = 0;
2703 uinfo->value.integer.max = 1;
2704
2705 return 0;
2706 }
2707 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
2708
2709 /**
2710 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
2711 *
2712 * @kcontrol: mixer control
2713 * @ucontrol: Value
2714 */
2715 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
2716 struct snd_ctl_elem_value *ucontrol)
2717 {
2718 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
2719 const char *pin = (const char *)kcontrol->private_value;
2720
2721 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2722
2723 ucontrol->value.integer.value[0] =
2724 snd_soc_dapm_get_pin_status(&card->dapm, pin);
2725
2726 mutex_unlock(&card->dapm_mutex);
2727
2728 return 0;
2729 }
2730 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
2731
2732 /**
2733 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
2734 *
2735 * @kcontrol: mixer control
2736 * @ucontrol: Value
2737 */
2738 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
2739 struct snd_ctl_elem_value *ucontrol)
2740 {
2741 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
2742 const char *pin = (const char *)kcontrol->private_value;
2743
2744 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2745
2746 if (ucontrol->value.integer.value[0])
2747 snd_soc_dapm_enable_pin(&card->dapm, pin);
2748 else
2749 snd_soc_dapm_disable_pin(&card->dapm, pin);
2750
2751 mutex_unlock(&card->dapm_mutex);
2752
2753 snd_soc_dapm_sync(&card->dapm);
2754 return 0;
2755 }
2756 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
2757
2758 static struct snd_soc_dapm_widget *
2759 snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
2760 const struct snd_soc_dapm_widget *widget)
2761 {
2762 struct snd_soc_dapm_widget *w;
2763 size_t name_len;
2764 int ret;
2765
2766 if ((w = dapm_cnew_widget(widget)) == NULL)
2767 return NULL;
2768
2769 switch (w->id) {
2770 case snd_soc_dapm_regulator_supply:
2771 w->priv = devm_regulator_get(dapm->dev, w->name);
2772 if (IS_ERR(w->priv)) {
2773 ret = PTR_ERR(w->priv);
2774 dev_err(dapm->dev, "Failed to request %s: %d\n",
2775 w->name, ret);
2776 return NULL;
2777 }
2778 break;
2779 default:
2780 break;
2781 }
2782
2783 name_len = strlen(widget->name) + 1;
2784 if (dapm->codec && dapm->codec->name_prefix)
2785 name_len += 1 + strlen(dapm->codec->name_prefix);
2786 w->name = kmalloc(name_len, GFP_KERNEL);
2787 if (w->name == NULL) {
2788 kfree(w);
2789 return NULL;
2790 }
2791 if (dapm->codec && dapm->codec->name_prefix)
2792 snprintf((char *)w->name, name_len, "%s %s",
2793 dapm->codec->name_prefix, widget->name);
2794 else
2795 snprintf((char *)w->name, name_len, "%s", widget->name);
2796
2797 switch (w->id) {
2798 case snd_soc_dapm_switch:
2799 case snd_soc_dapm_mixer:
2800 case snd_soc_dapm_mixer_named_ctl:
2801 w->power_check = dapm_generic_check_power;
2802 break;
2803 case snd_soc_dapm_mux:
2804 case snd_soc_dapm_virt_mux:
2805 case snd_soc_dapm_value_mux:
2806 w->power_check = dapm_generic_check_power;
2807 break;
2808 case snd_soc_dapm_adc:
2809 case snd_soc_dapm_aif_out:
2810 w->power_check = dapm_adc_check_power;
2811 break;
2812 case snd_soc_dapm_dac:
2813 case snd_soc_dapm_aif_in:
2814 w->power_check = dapm_dac_check_power;
2815 break;
2816 case snd_soc_dapm_pga:
2817 case snd_soc_dapm_out_drv:
2818 case snd_soc_dapm_input:
2819 case snd_soc_dapm_output:
2820 case snd_soc_dapm_micbias:
2821 case snd_soc_dapm_spk:
2822 case snd_soc_dapm_hp:
2823 case snd_soc_dapm_mic:
2824 case snd_soc_dapm_line:
2825 w->power_check = dapm_generic_check_power;
2826 break;
2827 case snd_soc_dapm_supply:
2828 case snd_soc_dapm_regulator_supply:
2829 w->power_check = dapm_supply_check_power;
2830 break;
2831 case snd_soc_dapm_dai:
2832 w->power_check = dapm_dai_check_power;
2833 break;
2834 default:
2835 w->power_check = dapm_always_on_check_power;
2836 break;
2837 }
2838
2839 dapm->n_widgets++;
2840 w->dapm = dapm;
2841 w->codec = dapm->codec;
2842 w->platform = dapm->platform;
2843 INIT_LIST_HEAD(&w->sources);
2844 INIT_LIST_HEAD(&w->sinks);
2845 INIT_LIST_HEAD(&w->list);
2846 INIT_LIST_HEAD(&w->dirty);
2847 list_add(&w->list, &dapm->card->widgets);
2848
2849 /* machine layer set ups unconnected pins and insertions */
2850 w->connected = 1;
2851 return w;
2852 }
2853
2854 /**
2855 * snd_soc_dapm_new_controls - create new dapm controls
2856 * @dapm: DAPM context
2857 * @widget: widget array
2858 * @num: number of widgets
2859 *
2860 * Creates new DAPM controls based upon the templates.
2861 *
2862 * Returns 0 for success else error.
2863 */
2864 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
2865 const struct snd_soc_dapm_widget *widget,
2866 int num)
2867 {
2868 struct snd_soc_dapm_widget *w;
2869 int i;
2870
2871 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2872 for (i = 0; i < num; i++) {
2873 w = snd_soc_dapm_new_control(dapm, widget);
2874 if (!w) {
2875 dev_err(dapm->dev,
2876 "ASoC: Failed to create DAPM control %s\n",
2877 widget->name);
2878 return -ENOMEM;
2879 }
2880 widget++;
2881 }
2882 mutex_unlock(&dapm->card->dapm_mutex);
2883 return 0;
2884 }
2885 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
2886
2887 int snd_soc_dapm_new_dai_widgets(struct snd_soc_dapm_context *dapm,
2888 struct snd_soc_dai *dai)
2889 {
2890 struct snd_soc_dapm_widget template;
2891 struct snd_soc_dapm_widget *w;
2892
2893 WARN_ON(dapm->dev != dai->dev);
2894
2895 memset(&template, 0, sizeof(template));
2896 template.reg = SND_SOC_NOPM;
2897
2898 if (dai->driver->playback.stream_name) {
2899 template.id = snd_soc_dapm_dai;
2900 template.name = dai->driver->playback.stream_name;
2901 template.sname = dai->driver->playback.stream_name;
2902
2903 dev_dbg(dai->dev, "adding %s widget\n",
2904 template.name);
2905
2906 w = snd_soc_dapm_new_control(dapm, &template);
2907 if (!w) {
2908 dev_err(dapm->dev, "Failed to create %s widget\n",
2909 dai->driver->playback.stream_name);
2910 }
2911
2912 w->priv = dai;
2913 dai->playback_widget = w;
2914 }
2915
2916 if (dai->driver->capture.stream_name) {
2917 template.id = snd_soc_dapm_dai;
2918 template.name = dai->driver->capture.stream_name;
2919 template.sname = dai->driver->capture.stream_name;
2920
2921 dev_dbg(dai->dev, "adding %s widget\n",
2922 template.name);
2923
2924 w = snd_soc_dapm_new_control(dapm, &template);
2925 if (!w) {
2926 dev_err(dapm->dev, "Failed to create %s widget\n",
2927 dai->driver->capture.stream_name);
2928 }
2929
2930 w->priv = dai;
2931 dai->capture_widget = w;
2932 }
2933
2934 return 0;
2935 }
2936
2937 int snd_soc_dapm_link_dai_widgets(struct snd_soc_card *card)
2938 {
2939 struct snd_soc_dapm_widget *dai_w, *w;
2940 struct snd_soc_dai *dai;
2941 struct snd_soc_dapm_route r;
2942
2943 memset(&r, 0, sizeof(r));
2944
2945 /* For each DAI widget... */
2946 list_for_each_entry(dai_w, &card->widgets, list) {
2947 if (dai_w->id != snd_soc_dapm_dai)
2948 continue;
2949
2950 dai = dai_w->priv;
2951
2952 /* ...find all widgets with the same stream and link them */
2953 list_for_each_entry(w, &card->widgets, list) {
2954 if (w->dapm != dai_w->dapm)
2955 continue;
2956
2957 if (w->id == snd_soc_dapm_dai)
2958 continue;
2959
2960 if (!w->sname)
2961 continue;
2962
2963 if (dai->driver->playback.stream_name &&
2964 strstr(w->sname,
2965 dai->driver->playback.stream_name)) {
2966 r.source = dai->playback_widget->name;
2967 r.sink = w->name;
2968 dev_dbg(dai->dev, "%s -> %s\n",
2969 r.source, r.sink);
2970
2971 snd_soc_dapm_add_route(w->dapm, &r);
2972 }
2973
2974 if (dai->driver->capture.stream_name &&
2975 strstr(w->sname,
2976 dai->driver->capture.stream_name)) {
2977 r.source = w->name;
2978 r.sink = dai->capture_widget->name;
2979 dev_dbg(dai->dev, "%s -> %s\n",
2980 r.source, r.sink);
2981
2982 snd_soc_dapm_add_route(w->dapm, &r);
2983 }
2984 }
2985 }
2986
2987 return 0;
2988 }
2989
2990 static void soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
2991 int event)
2992 {
2993
2994 struct snd_soc_dapm_widget *w_cpu, *w_codec;
2995 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2996 struct snd_soc_dai *codec_dai = rtd->codec_dai;
2997
2998 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
2999 w_cpu = cpu_dai->playback_widget;
3000 w_codec = codec_dai->playback_widget;
3001 } else {
3002 w_cpu = cpu_dai->capture_widget;
3003 w_codec = codec_dai->capture_widget;
3004 }
3005
3006 if (w_cpu) {
3007
3008 dapm_mark_dirty(w_cpu, "stream event");
3009
3010 switch (event) {
3011 case SND_SOC_DAPM_STREAM_START:
3012 w_cpu->active = 1;
3013 break;
3014 case SND_SOC_DAPM_STREAM_STOP:
3015 w_cpu->active = 0;
3016 break;
3017 case SND_SOC_DAPM_STREAM_SUSPEND:
3018 case SND_SOC_DAPM_STREAM_RESUME:
3019 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
3020 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
3021 break;
3022 }
3023 }
3024
3025 if (w_codec) {
3026
3027 dapm_mark_dirty(w_codec, "stream event");
3028
3029 switch (event) {
3030 case SND_SOC_DAPM_STREAM_START:
3031 w_codec->active = 1;
3032 break;
3033 case SND_SOC_DAPM_STREAM_STOP:
3034 w_codec->active = 0;
3035 break;
3036 case SND_SOC_DAPM_STREAM_SUSPEND:
3037 case SND_SOC_DAPM_STREAM_RESUME:
3038 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
3039 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
3040 break;
3041 }
3042 }
3043
3044 dapm_power_widgets(&rtd->card->dapm, event);
3045 }
3046
3047 /**
3048 * snd_soc_dapm_stream_event - send a stream event to the dapm core
3049 * @rtd: PCM runtime data
3050 * @stream: stream name
3051 * @event: stream event
3052 *
3053 * Sends a stream event to the dapm core. The core then makes any
3054 * necessary widget power changes.
3055 *
3056 * Returns 0 for success else error.
3057 */
3058 void snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
3059 int event)
3060 {
3061 struct snd_soc_card *card = rtd->card;
3062
3063 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3064 soc_dapm_stream_event(rtd, stream, event);
3065 mutex_unlock(&card->dapm_mutex);
3066 }
3067
3068 /**
3069 * snd_soc_dapm_enable_pin - enable pin.
3070 * @dapm: DAPM context
3071 * @pin: pin name
3072 *
3073 * Enables input/output pin and its parents or children widgets iff there is
3074 * a valid audio route and active audio stream.
3075 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3076 * do any widget power switching.
3077 */
3078 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
3079 {
3080 return snd_soc_dapm_set_pin(dapm, pin, 1);
3081 }
3082 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
3083
3084 /**
3085 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
3086 * @dapm: DAPM context
3087 * @pin: pin name
3088 *
3089 * Enables input/output pin regardless of any other state. This is
3090 * intended for use with microphone bias supplies used in microphone
3091 * jack detection.
3092 *
3093 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3094 * do any widget power switching.
3095 */
3096 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
3097 const char *pin)
3098 {
3099 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
3100
3101 if (!w) {
3102 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
3103 return -EINVAL;
3104 }
3105
3106 dev_dbg(w->dapm->dev, "dapm: force enable pin %s\n", pin);
3107 w->connected = 1;
3108 w->force = 1;
3109 dapm_mark_dirty(w, "force enable");
3110
3111 return 0;
3112 }
3113 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
3114
3115 /**
3116 * snd_soc_dapm_disable_pin - disable pin.
3117 * @dapm: DAPM context
3118 * @pin: pin name
3119 *
3120 * Disables input/output pin and its parents or children widgets.
3121 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3122 * do any widget power switching.
3123 */
3124 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
3125 const char *pin)
3126 {
3127 return snd_soc_dapm_set_pin(dapm, pin, 0);
3128 }
3129 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
3130
3131 /**
3132 * snd_soc_dapm_nc_pin - permanently disable pin.
3133 * @dapm: DAPM context
3134 * @pin: pin name
3135 *
3136 * Marks the specified pin as being not connected, disabling it along
3137 * any parent or child widgets. At present this is identical to
3138 * snd_soc_dapm_disable_pin() but in future it will be extended to do
3139 * additional things such as disabling controls which only affect
3140 * paths through the pin.
3141 *
3142 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3143 * do any widget power switching.
3144 */
3145 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
3146 {
3147 return snd_soc_dapm_set_pin(dapm, pin, 0);
3148 }
3149 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
3150
3151 /**
3152 * snd_soc_dapm_get_pin_status - get audio pin status
3153 * @dapm: DAPM context
3154 * @pin: audio signal pin endpoint (or start point)
3155 *
3156 * Get audio pin status - connected or disconnected.
3157 *
3158 * Returns 1 for connected otherwise 0.
3159 */
3160 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
3161 const char *pin)
3162 {
3163 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
3164
3165 if (w)
3166 return w->connected;
3167
3168 return 0;
3169 }
3170 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
3171
3172 /**
3173 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
3174 * @dapm: DAPM context
3175 * @pin: audio signal pin endpoint (or start point)
3176 *
3177 * Mark the given endpoint or pin as ignoring suspend. When the
3178 * system is disabled a path between two endpoints flagged as ignoring
3179 * suspend will not be disabled. The path must already be enabled via
3180 * normal means at suspend time, it will not be turned on if it was not
3181 * already enabled.
3182 */
3183 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
3184 const char *pin)
3185 {
3186 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
3187
3188 if (!w) {
3189 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
3190 return -EINVAL;
3191 }
3192
3193 w->ignore_suspend = 1;
3194
3195 return 0;
3196 }
3197 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
3198
3199 static bool snd_soc_dapm_widget_in_card_paths(struct snd_soc_card *card,
3200 struct snd_soc_dapm_widget *w)
3201 {
3202 struct snd_soc_dapm_path *p;
3203
3204 list_for_each_entry(p, &card->paths, list) {
3205 if ((p->source == w) || (p->sink == w)) {
3206 dev_dbg(card->dev,
3207 "... Path %s(id:%d dapm:%p) - %s(id:%d dapm:%p)\n",
3208 p->source->name, p->source->id, p->source->dapm,
3209 p->sink->name, p->sink->id, p->sink->dapm);
3210
3211 /* Connected to something other than the codec */
3212 if (p->source->dapm != p->sink->dapm)
3213 return true;
3214 /*
3215 * Loopback connection from codec external pin to
3216 * codec external pin
3217 */
3218 if (p->sink->id == snd_soc_dapm_input) {
3219 switch (p->source->id) {
3220 case snd_soc_dapm_output:
3221 case snd_soc_dapm_micbias:
3222 return true;
3223 default:
3224 break;
3225 }
3226 }
3227 }
3228 }
3229
3230 return false;
3231 }
3232
3233 /**
3234 * snd_soc_dapm_auto_nc_codec_pins - call snd_soc_dapm_nc_pin for unused pins
3235 * @codec: The codec whose pins should be processed
3236 *
3237 * Automatically call snd_soc_dapm_nc_pin() for any external pins in the codec
3238 * which are unused. Pins are used if they are connected externally to the
3239 * codec, whether that be to some other device, or a loop-back connection to
3240 * the codec itself.
3241 */
3242 void snd_soc_dapm_auto_nc_codec_pins(struct snd_soc_codec *codec)
3243 {
3244 struct snd_soc_card *card = codec->card;
3245 struct snd_soc_dapm_context *dapm = &codec->dapm;
3246 struct snd_soc_dapm_widget *w;
3247
3248 dev_dbg(codec->dev, "Auto NC: DAPMs: card:%p codec:%p\n",
3249 &card->dapm, &codec->dapm);
3250
3251 list_for_each_entry(w, &card->widgets, list) {
3252 if (w->dapm != dapm)
3253 continue;
3254 switch (w->id) {
3255 case snd_soc_dapm_input:
3256 case snd_soc_dapm_output:
3257 case snd_soc_dapm_micbias:
3258 dev_dbg(codec->dev, "Auto NC: Checking widget %s\n",
3259 w->name);
3260 if (!snd_soc_dapm_widget_in_card_paths(card, w)) {
3261 dev_dbg(codec->dev,
3262 "... Not in map; disabling\n");
3263 snd_soc_dapm_nc_pin(dapm, w->name);
3264 }
3265 break;
3266 default:
3267 break;
3268 }
3269 }
3270 }
3271
3272 /**
3273 * snd_soc_dapm_free - free dapm resources
3274 * @dapm: DAPM context
3275 *
3276 * Free all dapm widgets and resources.
3277 */
3278 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
3279 {
3280 snd_soc_dapm_sys_remove(dapm->dev);
3281 dapm_debugfs_cleanup(dapm);
3282 dapm_free_widgets(dapm);
3283 list_del(&dapm->list);
3284 }
3285 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
3286
3287 static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context *dapm)
3288 {
3289 struct snd_soc_dapm_widget *w;
3290 LIST_HEAD(down_list);
3291 int powerdown = 0;
3292
3293 list_for_each_entry(w, &dapm->card->widgets, list) {
3294 if (w->dapm != dapm)
3295 continue;
3296 if (w->power) {
3297 dapm_seq_insert(w, &down_list, false);
3298 w->power = 0;
3299 powerdown = 1;
3300 }
3301 }
3302
3303 /* If there were no widgets to power down we're already in
3304 * standby.
3305 */
3306 if (powerdown) {
3307 if (dapm->bias_level == SND_SOC_BIAS_ON)
3308 snd_soc_dapm_set_bias_level(dapm,
3309 SND_SOC_BIAS_PREPARE);
3310 dapm_seq_run(dapm, &down_list, 0, false);
3311 if (dapm->bias_level == SND_SOC_BIAS_PREPARE)
3312 snd_soc_dapm_set_bias_level(dapm,
3313 SND_SOC_BIAS_STANDBY);
3314 }
3315 }
3316
3317 /*
3318 * snd_soc_dapm_shutdown - callback for system shutdown
3319 */
3320 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
3321 {
3322 struct snd_soc_codec *codec;
3323
3324 list_for_each_entry(codec, &card->codec_dev_list, list) {
3325 soc_dapm_shutdown_codec(&codec->dapm);
3326 if (codec->dapm.bias_level == SND_SOC_BIAS_STANDBY)
3327 snd_soc_dapm_set_bias_level(&codec->dapm,
3328 SND_SOC_BIAS_OFF);
3329 }
3330 }
3331
3332 /* Module information */
3333 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3334 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
3335 MODULE_LICENSE("GPL");
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