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