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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/meadphone 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 powerdown of audio susbsystem to reduce pops between a quick
22 * device reopen.
23 *
24 * Todo:
25 * o DAPM power change sequencing - allow for configurable per
26 * codec sequences.
27 * o Support for analogue bias optimisation.
28 * o Support for reduced codec oversampling rates.
29 * o Support for reduced codec bias currents.
30 */
31
32#include <linux/module.h>
33#include <linux/moduleparam.h>
34#include <linux/init.h>
35#include <linux/async.h>
36#include <linux/delay.h>
37#include <linux/pm.h>
38#include <linux/bitops.h>
39#include <linux/platform_device.h>
40#include <linux/jiffies.h>
41#include <linux/debugfs.h>
42#include <linux/slab.h>
43#include <sound/core.h>
44#include <sound/pcm.h>
45#include <sound/pcm_params.h>
46#include <sound/soc.h>
47#include <sound/initval.h>
48
49#include <trace/events/asoc.h>
50
51/* dapm power sequences - make this per codec in the future */
52static int dapm_up_seq[] = {
53 [snd_soc_dapm_pre] = 0,
54 [snd_soc_dapm_supply] = 1,
55 [snd_soc_dapm_micbias] = 2,
56 [snd_soc_dapm_aif_in] = 3,
57 [snd_soc_dapm_aif_out] = 3,
58 [snd_soc_dapm_mic] = 4,
59 [snd_soc_dapm_mux] = 5,
60 [snd_soc_dapm_virt_mux] = 5,
61 [snd_soc_dapm_value_mux] = 5,
62 [snd_soc_dapm_dac] = 6,
63 [snd_soc_dapm_mixer] = 7,
64 [snd_soc_dapm_mixer_named_ctl] = 7,
65 [snd_soc_dapm_pga] = 8,
66 [snd_soc_dapm_adc] = 9,
67 [snd_soc_dapm_out_drv] = 10,
68 [snd_soc_dapm_hp] = 10,
69 [snd_soc_dapm_spk] = 10,
70 [snd_soc_dapm_post] = 11,
71};
72
73static int dapm_down_seq[] = {
74 [snd_soc_dapm_pre] = 0,
75 [snd_soc_dapm_adc] = 1,
76 [snd_soc_dapm_hp] = 2,
77 [snd_soc_dapm_spk] = 2,
78 [snd_soc_dapm_out_drv] = 2,
79 [snd_soc_dapm_pga] = 4,
80 [snd_soc_dapm_mixer_named_ctl] = 5,
81 [snd_soc_dapm_mixer] = 5,
82 [snd_soc_dapm_dac] = 6,
83 [snd_soc_dapm_mic] = 7,
84 [snd_soc_dapm_micbias] = 8,
85 [snd_soc_dapm_mux] = 9,
86 [snd_soc_dapm_virt_mux] = 9,
87 [snd_soc_dapm_value_mux] = 9,
88 [snd_soc_dapm_aif_in] = 10,
89 [snd_soc_dapm_aif_out] = 10,
90 [snd_soc_dapm_supply] = 11,
91 [snd_soc_dapm_post] = 12,
92};
93
94static void pop_wait(u32 pop_time)
95{
96 if (pop_time)
97 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
98}
99
100static void pop_dbg(struct device *dev, u32 pop_time, const char *fmt, ...)
101{
102 va_list args;
103 char *buf;
104
105 if (!pop_time)
106 return;
107
108 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
109 if (buf == NULL)
110 return;
111
112 va_start(args, fmt);
113 vsnprintf(buf, PAGE_SIZE, fmt, args);
114 dev_info(dev, "%s", buf);
115 va_end(args);
116
117 kfree(buf);
118}
119
120/* create a new dapm widget */
121static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
122 const struct snd_soc_dapm_widget *_widget)
123{
124 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
125}
126
127/* get snd_card from DAPM context */
128static inline struct snd_card *dapm_get_snd_card(
129 struct snd_soc_dapm_context *dapm)
130{
131 if (dapm->codec)
132 return dapm->codec->card->snd_card;
133 else if (dapm->platform)
134 return dapm->platform->card->snd_card;
135 else
136 BUG();
137
138 /* unreachable */
139 return NULL;
140}
141
142/* get soc_card from DAPM context */
143static inline struct snd_soc_card *dapm_get_soc_card(
144 struct snd_soc_dapm_context *dapm)
145{
146 if (dapm->codec)
147 return dapm->codec->card;
148 else if (dapm->platform)
149 return dapm->platform->card;
150 else
151 BUG();
152
153 /* unreachable */
154 return NULL;
155}
156
157static int soc_widget_read(struct snd_soc_dapm_widget *w, int reg)
158{
159 if (w->codec)
160 return snd_soc_read(w->codec, reg);
161 else if (w->platform)
162 return snd_soc_platform_read(w->platform, reg);
163
164 dev_err(w->dapm->dev, "no valid widget read method\n");
165 return -1;
166}
167
168static int soc_widget_write(struct snd_soc_dapm_widget *w, int reg, int val)
169{
170 if (w->codec)
171 return snd_soc_write(w->codec, reg, val);
172 else if (w->platform)
173 return snd_soc_platform_write(w->platform, reg, val);
174
175 dev_err(w->dapm->dev, "no valid widget write method\n");
176 return -1;
177}
178
179static int soc_widget_update_bits(struct snd_soc_dapm_widget *w,
180 unsigned short reg, unsigned int mask, unsigned int value)
181{
182 int change;
183 unsigned int old, new;
184 int ret;
185
186 ret = soc_widget_read(w, reg);
187 if (ret < 0)
188 return ret;
189
190 old = ret;
191 new = (old & ~mask) | (value & mask);
192 change = old != new;
193 if (change) {
194 ret = soc_widget_write(w, reg, new);
195 if (ret < 0)
196 return ret;
197 }
198
199 return change;
200}
201
202/**
203 * snd_soc_dapm_set_bias_level - set the bias level for the system
204 * @dapm: DAPM context
205 * @level: level to configure
206 *
207 * Configure the bias (power) levels for the SoC audio device.
208 *
209 * Returns 0 for success else error.
210 */
211static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm,
212 enum snd_soc_bias_level level)
213{
214 struct snd_soc_card *card = dapm->card;
215 int ret = 0;
216
217 trace_snd_soc_bias_level_start(card, level);
218
219 if (card && card->set_bias_level)
220 ret = card->set_bias_level(card, dapm, level);
221 if (ret != 0)
222 goto out;
223
224 if (dapm->codec) {
225 if (dapm->codec->driver->set_bias_level)
226 ret = dapm->codec->driver->set_bias_level(dapm->codec,
227 level);
228 else
229 dapm->bias_level = level;
230 }
231 if (ret != 0)
232 goto out;
233
234 if (card && card->set_bias_level_post)
235 ret = card->set_bias_level_post(card, dapm, level);
236out:
237 trace_snd_soc_bias_level_done(card, level);
238
239 return ret;
240}
241
242/* set up initial codec paths */
243static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
244 struct snd_soc_dapm_path *p, int i)
245{
246 switch (w->id) {
247 case snd_soc_dapm_switch:
248 case snd_soc_dapm_mixer:
249 case snd_soc_dapm_mixer_named_ctl: {
250 int val;
251 struct soc_mixer_control *mc = (struct soc_mixer_control *)
252 w->kcontrol_news[i].private_value;
253 unsigned int reg = mc->reg;
254 unsigned int shift = mc->shift;
255 int max = mc->max;
256 unsigned int mask = (1 << fls(max)) - 1;
257 unsigned int invert = mc->invert;
258
259 val = soc_widget_read(w, reg);
260 val = (val >> shift) & mask;
261
262 if ((invert && !val) || (!invert && val))
263 p->connect = 1;
264 else
265 p->connect = 0;
266 }
267 break;
268 case snd_soc_dapm_mux: {
269 struct soc_enum *e = (struct soc_enum *)
270 w->kcontrol_news[i].private_value;
271 int val, item, bitmask;
272
273 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
274 ;
275 val = soc_widget_read(w, e->reg);
276 item = (val >> e->shift_l) & (bitmask - 1);
277
278 p->connect = 0;
279 for (i = 0; i < e->max; i++) {
280 if (!(strcmp(p->name, e->texts[i])) && item == i)
281 p->connect = 1;
282 }
283 }
284 break;
285 case snd_soc_dapm_virt_mux: {
286 struct soc_enum *e = (struct soc_enum *)
287 w->kcontrol_news[i].private_value;
288
289 p->connect = 0;
290 /* since a virtual mux has no backing registers to
291 * decide which path to connect, it will try to match
292 * with the first enumeration. This is to ensure
293 * that the default mux choice (the first) will be
294 * correctly powered up during initialization.
295 */
296 if (!strcmp(p->name, e->texts[0]))
297 p->connect = 1;
298 }
299 break;
300 case snd_soc_dapm_value_mux: {
301 struct soc_enum *e = (struct soc_enum *)
302 w->kcontrol_news[i].private_value;
303 int val, item;
304
305 val = soc_widget_read(w, e->reg);
306 val = (val >> e->shift_l) & e->mask;
307 for (item = 0; item < e->max; item++) {
308 if (val == e->values[item])
309 break;
310 }
311
312 p->connect = 0;
313 for (i = 0; i < e->max; i++) {
314 if (!(strcmp(p->name, e->texts[i])) && item == i)
315 p->connect = 1;
316 }
317 }
318 break;
319 /* does not effect routing - always connected */
320 case snd_soc_dapm_pga:
321 case snd_soc_dapm_out_drv:
322 case snd_soc_dapm_output:
323 case snd_soc_dapm_adc:
324 case snd_soc_dapm_input:
325 case snd_soc_dapm_dac:
326 case snd_soc_dapm_micbias:
327 case snd_soc_dapm_vmid:
328 case snd_soc_dapm_supply:
329 case snd_soc_dapm_aif_in:
330 case snd_soc_dapm_aif_out:
331 p->connect = 1;
332 break;
333 /* does effect routing - dynamically connected */
334 case snd_soc_dapm_hp:
335 case snd_soc_dapm_mic:
336 case snd_soc_dapm_spk:
337 case snd_soc_dapm_line:
338 case snd_soc_dapm_pre:
339 case snd_soc_dapm_post:
340 p->connect = 0;
341 break;
342 }
343}
344
345/* connect mux widget to its interconnecting audio paths */
346static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
347 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
348 struct snd_soc_dapm_path *path, const char *control_name,
349 const struct snd_kcontrol_new *kcontrol)
350{
351 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
352 int i;
353
354 for (i = 0; i < e->max; i++) {
355 if (!(strcmp(control_name, e->texts[i]))) {
356 list_add(&path->list, &dapm->card->paths);
357 list_add(&path->list_sink, &dest->sources);
358 list_add(&path->list_source, &src->sinks);
359 path->name = (char*)e->texts[i];
360 dapm_set_path_status(dest, path, 0);
361 return 0;
362 }
363 }
364
365 return -ENODEV;
366}
367
368/* connect mixer widget to its interconnecting audio paths */
369static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
370 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
371 struct snd_soc_dapm_path *path, const char *control_name)
372{
373 int i;
374
375 /* search for mixer kcontrol */
376 for (i = 0; i < dest->num_kcontrols; i++) {
377 if (!strcmp(control_name, dest->kcontrol_news[i].name)) {
378 list_add(&path->list, &dapm->card->paths);
379 list_add(&path->list_sink, &dest->sources);
380 list_add(&path->list_source, &src->sinks);
381 path->name = dest->kcontrol_news[i].name;
382 dapm_set_path_status(dest, path, i);
383 return 0;
384 }
385 }
386 return -ENODEV;
387}
388
389static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm,
390 struct snd_soc_dapm_widget *kcontrolw,
391 const struct snd_kcontrol_new *kcontrol_new,
392 struct snd_kcontrol **kcontrol)
393{
394 struct snd_soc_dapm_widget *w;
395 int i;
396
397 *kcontrol = NULL;
398
399 list_for_each_entry(w, &dapm->card->widgets, list) {
400 if (w == kcontrolw || w->dapm != kcontrolw->dapm)
401 continue;
402 for (i = 0; i < w->num_kcontrols; i++) {
403 if (&w->kcontrol_news[i] == kcontrol_new) {
404 if (w->kcontrols)
405 *kcontrol = w->kcontrols[i];
406 return 1;
407 }
408 }
409 }
410
411 return 0;
412}
413
414/* create new dapm mixer control */
415static int dapm_new_mixer(struct snd_soc_dapm_widget *w)
416{
417 struct snd_soc_dapm_context *dapm = w->dapm;
418 int i, ret = 0;
419 size_t name_len, prefix_len;
420 struct snd_soc_dapm_path *path;
421 struct snd_card *card = dapm->card->snd_card;
422 const char *prefix;
423 struct snd_soc_dapm_widget_list *wlist;
424 size_t wlistsize;
425
426 if (dapm->codec)
427 prefix = dapm->codec->name_prefix;
428 else
429 prefix = NULL;
430
431 if (prefix)
432 prefix_len = strlen(prefix) + 1;
433 else
434 prefix_len = 0;
435
436 /* add kcontrol */
437 for (i = 0; i < w->num_kcontrols; i++) {
438
439 /* match name */
440 list_for_each_entry(path, &w->sources, list_sink) {
441
442 /* mixer/mux paths name must match control name */
443 if (path->name != (char *)w->kcontrol_news[i].name)
444 continue;
445
446 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
447 sizeof(struct snd_soc_dapm_widget *),
448 wlist = kzalloc(wlistsize, GFP_KERNEL);
449 if (wlist == NULL) {
450 dev_err(dapm->dev,
451 "asoc: can't allocate widget list for %s\n",
452 w->name);
453 return -ENOMEM;
454 }
455 wlist->num_widgets = 1;
456 wlist->widgets[0] = w;
457
458 /* add dapm control with long name.
459 * for dapm_mixer this is the concatenation of the
460 * mixer and kcontrol name.
461 * for dapm_mixer_named_ctl this is simply the
462 * kcontrol name.
463 */
464 name_len = strlen(w->kcontrol_news[i].name) + 1;
465 if (w->id != snd_soc_dapm_mixer_named_ctl)
466 name_len += 1 + strlen(w->name);
467
468 path->long_name = kmalloc(name_len, GFP_KERNEL);
469
470 if (path->long_name == NULL) {
471 kfree(wlist);
472 return -ENOMEM;
473 }
474
475 switch (w->id) {
476 default:
477 /* The control will get a prefix from
478 * the control creation process but
479 * we're also using the same prefix
480 * for widgets so cut the prefix off
481 * the front of the widget name.
482 */
483 snprintf(path->long_name, name_len, "%s %s",
484 w->name + prefix_len,
485 w->kcontrol_news[i].name);
486 break;
487 case snd_soc_dapm_mixer_named_ctl:
488 snprintf(path->long_name, name_len, "%s",
489 w->kcontrol_news[i].name);
490 break;
491 }
492
493 path->long_name[name_len - 1] = '\0';
494
495 path->kcontrol = snd_soc_cnew(&w->kcontrol_news[i],
496 wlist, path->long_name,
497 prefix);
498 ret = snd_ctl_add(card, path->kcontrol);
499 if (ret < 0) {
500 dev_err(dapm->dev,
501 "asoc: failed to add dapm kcontrol %s: %d\n",
502 path->long_name, ret);
503 kfree(wlist);
504 kfree(path->long_name);
505 path->long_name = NULL;
506 return ret;
507 }
508 w->kcontrols[i] = path->kcontrol;
509 }
510 }
511 return ret;
512}
513
514/* create new dapm mux control */
515static int dapm_new_mux(struct snd_soc_dapm_widget *w)
516{
517 struct snd_soc_dapm_context *dapm = w->dapm;
518 struct snd_soc_dapm_path *path = NULL;
519 struct snd_kcontrol *kcontrol;
520 struct snd_card *card = dapm->card->snd_card;
521 const char *prefix;
522 size_t prefix_len;
523 int ret;
524 struct snd_soc_dapm_widget_list *wlist;
525 int shared, wlistentries;
526 size_t wlistsize;
527 char *name;
528
529 if (w->num_kcontrols != 1) {
530 dev_err(dapm->dev,
531 "asoc: mux %s has incorrect number of controls\n",
532 w->name);
533 return -EINVAL;
534 }
535
536 shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[0],
537 &kcontrol);
538 if (kcontrol) {
539 wlist = kcontrol->private_data;
540 wlistentries = wlist->num_widgets + 1;
541 } else {
542 wlist = NULL;
543 wlistentries = 1;
544 }
545 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
546 wlistentries * sizeof(struct snd_soc_dapm_widget *),
547 wlist = krealloc(wlist, wlistsize, GFP_KERNEL);
548 if (wlist == NULL) {
549 dev_err(dapm->dev,
550 "asoc: can't allocate widget list for %s\n", w->name);
551 return -ENOMEM;
552 }
553 wlist->num_widgets = wlistentries;
554 wlist->widgets[wlistentries - 1] = w;
555
556 if (!kcontrol) {
557 if (dapm->codec)
558 prefix = dapm->codec->name_prefix;
559 else
560 prefix = NULL;
561
562 if (shared) {
563 name = w->kcontrol_news[0].name;
564 prefix_len = 0;
565 } else {
566 name = w->name;
567 if (prefix)
568 prefix_len = strlen(prefix) + 1;
569 else
570 prefix_len = 0;
571 }
572
573 /*
574 * The control will get a prefix from the control creation
575 * process but we're also using the same prefix for widgets so
576 * cut the prefix off the front of the widget name.
577 */
578 kcontrol = snd_soc_cnew(&w->kcontrol_news[0], wlist,
579 name + prefix_len, prefix);
580 ret = snd_ctl_add(card, kcontrol);
581 if (ret < 0) {
582 dev_err(dapm->dev,
583 "asoc: failed to add kcontrol %s\n", w->name);
584 kfree(wlist);
585 return ret;
586 }
587 }
588
589 kcontrol->private_data = wlist;
590
591 w->kcontrols[0] = kcontrol;
592
593 list_for_each_entry(path, &w->sources, list_sink)
594 path->kcontrol = kcontrol;
595
596 return 0;
597}
598
599/* create new dapm volume control */
600static int dapm_new_pga(struct snd_soc_dapm_widget *w)
601{
602 if (w->num_kcontrols)
603 dev_err(w->dapm->dev,
604 "asoc: PGA controls not supported: '%s'\n", w->name);
605
606 return 0;
607}
608
609/* reset 'walked' bit for each dapm path */
610static inline void dapm_clear_walk(struct snd_soc_dapm_context *dapm)
611{
612 struct snd_soc_dapm_path *p;
613
614 list_for_each_entry(p, &dapm->card->paths, list)
615 p->walked = 0;
616}
617
618/* We implement power down on suspend by checking the power state of
619 * the ALSA card - when we are suspending the ALSA state for the card
620 * is set to D3.
621 */
622static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
623{
624 int level = snd_power_get_state(widget->dapm->card->snd_card);
625
626 switch (level) {
627 case SNDRV_CTL_POWER_D3hot:
628 case SNDRV_CTL_POWER_D3cold:
629 if (widget->ignore_suspend)
630 dev_dbg(widget->dapm->dev, "%s ignoring suspend\n",
631 widget->name);
632 return widget->ignore_suspend;
633 default:
634 return 1;
635 }
636}
637
638/*
639 * Recursively check for a completed path to an active or physically connected
640 * output widget. Returns number of complete paths.
641 */
642static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
643{
644 struct snd_soc_dapm_path *path;
645 int con = 0;
646
647 if (widget->id == snd_soc_dapm_supply)
648 return 0;
649
650 switch (widget->id) {
651 case snd_soc_dapm_adc:
652 case snd_soc_dapm_aif_out:
653 if (widget->active)
654 return snd_soc_dapm_suspend_check(widget);
655 default:
656 break;
657 }
658
659 if (widget->connected) {
660 /* connected pin ? */
661 if (widget->id == snd_soc_dapm_output && !widget->ext)
662 return snd_soc_dapm_suspend_check(widget);
663
664 /* connected jack or spk ? */
665 if (widget->id == snd_soc_dapm_hp || widget->id == snd_soc_dapm_spk ||
666 (widget->id == snd_soc_dapm_line && !list_empty(&widget->sources)))
667 return snd_soc_dapm_suspend_check(widget);
668 }
669
670 list_for_each_entry(path, &widget->sinks, list_source) {
671 if (path->weak)
672 continue;
673
674 if (path->walked)
675 continue;
676
677 if (path->sink && path->connect) {
678 path->walked = 1;
679 con += is_connected_output_ep(path->sink);
680 }
681 }
682
683 return con;
684}
685
686/*
687 * Recursively check for a completed path to an active or physically connected
688 * input widget. Returns number of complete paths.
689 */
690static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
691{
692 struct snd_soc_dapm_path *path;
693 int con = 0;
694
695 if (widget->id == snd_soc_dapm_supply)
696 return 0;
697
698 /* active stream ? */
699 switch (widget->id) {
700 case snd_soc_dapm_dac:
701 case snd_soc_dapm_aif_in:
702 if (widget->active)
703 return snd_soc_dapm_suspend_check(widget);
704 default:
705 break;
706 }
707
708 if (widget->connected) {
709 /* connected pin ? */
710 if (widget->id == snd_soc_dapm_input && !widget->ext)
711 return snd_soc_dapm_suspend_check(widget);
712
713 /* connected VMID/Bias for lower pops */
714 if (widget->id == snd_soc_dapm_vmid)
715 return snd_soc_dapm_suspend_check(widget);
716
717 /* connected jack ? */
718 if (widget->id == snd_soc_dapm_mic ||
719 (widget->id == snd_soc_dapm_line && !list_empty(&widget->sinks)))
720 return snd_soc_dapm_suspend_check(widget);
721 }
722
723 list_for_each_entry(path, &widget->sources, list_sink) {
724 if (path->weak)
725 continue;
726
727 if (path->walked)
728 continue;
729
730 if (path->source && path->connect) {
731 path->walked = 1;
732 con += is_connected_input_ep(path->source);
733 }
734 }
735
736 return con;
737}
738
739/*
740 * Handler for generic register modifier widget.
741 */
742int dapm_reg_event(struct snd_soc_dapm_widget *w,
743 struct snd_kcontrol *kcontrol, int event)
744{
745 unsigned int val;
746
747 if (SND_SOC_DAPM_EVENT_ON(event))
748 val = w->on_val;
749 else
750 val = w->off_val;
751
752 soc_widget_update_bits(w, -(w->reg + 1),
753 w->mask << w->shift, val << w->shift);
754
755 return 0;
756}
757EXPORT_SYMBOL_GPL(dapm_reg_event);
758
759/* Generic check to see if a widget should be powered.
760 */
761static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
762{
763 int in, out;
764
765 in = is_connected_input_ep(w);
766 dapm_clear_walk(w->dapm);
767 out = is_connected_output_ep(w);
768 dapm_clear_walk(w->dapm);
769 return out != 0 && in != 0;
770}
771
772/* Check to see if an ADC has power */
773static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
774{
775 int in;
776
777 if (w->active) {
778 in = is_connected_input_ep(w);
779 dapm_clear_walk(w->dapm);
780 return in != 0;
781 } else {
782 return dapm_generic_check_power(w);
783 }
784}
785
786/* Check to see if a DAC has power */
787static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
788{
789 int out;
790
791 if (w->active) {
792 out = is_connected_output_ep(w);
793 dapm_clear_walk(w->dapm);
794 return out != 0;
795 } else {
796 return dapm_generic_check_power(w);
797 }
798}
799
800/* Check to see if a power supply is needed */
801static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
802{
803 struct snd_soc_dapm_path *path;
804 int power = 0;
805
806 /* Check if one of our outputs is connected */
807 list_for_each_entry(path, &w->sinks, list_source) {
808 if (path->weak)
809 continue;
810
811 if (path->connected &&
812 !path->connected(path->source, path->sink))
813 continue;
814
815 if (!path->sink)
816 continue;
817
818 if (path->sink->force) {
819 power = 1;
820 break;
821 }
822
823 if (path->sink->power_check &&
824 path->sink->power_check(path->sink)) {
825 power = 1;
826 break;
827 }
828 }
829
830 dapm_clear_walk(w->dapm);
831
832 return power;
833}
834
835static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
836 struct snd_soc_dapm_widget *b,
837 bool power_up)
838{
839 int *sort;
840
841 if (power_up)
842 sort = dapm_up_seq;
843 else
844 sort = dapm_down_seq;
845
846 if (sort[a->id] != sort[b->id])
847 return sort[a->id] - sort[b->id];
848 if (a->subseq != b->subseq) {
849 if (power_up)
850 return a->subseq - b->subseq;
851 else
852 return b->subseq - a->subseq;
853 }
854 if (a->reg != b->reg)
855 return a->reg - b->reg;
856 if (a->dapm != b->dapm)
857 return (unsigned long)a->dapm - (unsigned long)b->dapm;
858
859 return 0;
860}
861
862/* Insert a widget in order into a DAPM power sequence. */
863static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
864 struct list_head *list,
865 bool power_up)
866{
867 struct snd_soc_dapm_widget *w;
868
869 list_for_each_entry(w, list, power_list)
870 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
871 list_add_tail(&new_widget->power_list, &w->power_list);
872 return;
873 }
874
875 list_add_tail(&new_widget->power_list, list);
876}
877
878static void dapm_seq_check_event(struct snd_soc_dapm_context *dapm,
879 struct snd_soc_dapm_widget *w, int event)
880{
881 struct snd_soc_card *card = dapm->card;
882 const char *ev_name;
883 int power, ret;
884
885 switch (event) {
886 case SND_SOC_DAPM_PRE_PMU:
887 ev_name = "PRE_PMU";
888 power = 1;
889 break;
890 case SND_SOC_DAPM_POST_PMU:
891 ev_name = "POST_PMU";
892 power = 1;
893 break;
894 case SND_SOC_DAPM_PRE_PMD:
895 ev_name = "PRE_PMD";
896 power = 0;
897 break;
898 case SND_SOC_DAPM_POST_PMD:
899 ev_name = "POST_PMD";
900 power = 0;
901 break;
902 default:
903 BUG();
904 return;
905 }
906
907 if (w->power != power)
908 return;
909
910 if (w->event && (w->event_flags & event)) {
911 pop_dbg(dapm->dev, card->pop_time, "pop test : %s %s\n",
912 w->name, ev_name);
913 trace_snd_soc_dapm_widget_event_start(w, event);
914 ret = w->event(w, NULL, event);
915 trace_snd_soc_dapm_widget_event_done(w, event);
916 if (ret < 0)
917 pr_err("%s: %s event failed: %d\n",
918 ev_name, w->name, ret);
919 }
920}
921
922/* Apply the coalesced changes from a DAPM sequence */
923static void dapm_seq_run_coalesced(struct snd_soc_dapm_context *dapm,
924 struct list_head *pending)
925{
926 struct snd_soc_card *card = dapm->card;
927 struct snd_soc_dapm_widget *w;
928 int reg, power;
929 unsigned int value = 0;
930 unsigned int mask = 0;
931 unsigned int cur_mask;
932
933 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
934 power_list)->reg;
935
936 list_for_each_entry(w, pending, power_list) {
937 cur_mask = 1 << w->shift;
938 BUG_ON(reg != w->reg);
939
940 if (w->invert)
941 power = !w->power;
942 else
943 power = w->power;
944
945 mask |= cur_mask;
946 if (power)
947 value |= cur_mask;
948
949 pop_dbg(dapm->dev, card->pop_time,
950 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
951 w->name, reg, value, mask);
952
953 /* Check for events */
954 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMU);
955 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMD);
956 }
957
958 if (reg >= 0) {
959 /* Any widget will do, they should all be updating the
960 * same register.
961 */
962 w = list_first_entry(pending, struct snd_soc_dapm_widget,
963 power_list);
964
965 pop_dbg(dapm->dev, card->pop_time,
966 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
967 value, mask, reg, card->pop_time);
968 pop_wait(card->pop_time);
969 soc_widget_update_bits(w, reg, mask, value);
970 }
971
972 list_for_each_entry(w, pending, power_list) {
973 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMU);
974 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMD);
975 }
976}
977
978/* Apply a DAPM power sequence.
979 *
980 * We walk over a pre-sorted list of widgets to apply power to. In
981 * order to minimise the number of writes to the device required
982 * multiple widgets will be updated in a single write where possible.
983 * Currently anything that requires more than a single write is not
984 * handled.
985 */
986static void dapm_seq_run(struct snd_soc_dapm_context *dapm,
987 struct list_head *list, int event, bool power_up)
988{
989 struct snd_soc_dapm_widget *w, *n;
990 LIST_HEAD(pending);
991 int cur_sort = -1;
992 int cur_subseq = -1;
993 int cur_reg = SND_SOC_NOPM;
994 struct snd_soc_dapm_context *cur_dapm = NULL;
995 int ret, i;
996 int *sort;
997
998 if (power_up)
999 sort = dapm_up_seq;
1000 else
1001 sort = dapm_down_seq;
1002
1003 list_for_each_entry_safe(w, n, list, power_list) {
1004 ret = 0;
1005
1006 /* Do we need to apply any queued changes? */
1007 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
1008 w->dapm != cur_dapm || w->subseq != cur_subseq) {
1009 if (!list_empty(&pending))
1010 dapm_seq_run_coalesced(cur_dapm, &pending);
1011
1012 if (cur_dapm && cur_dapm->seq_notifier) {
1013 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1014 if (sort[i] == cur_sort)
1015 cur_dapm->seq_notifier(cur_dapm,
1016 i,
1017 cur_subseq);
1018 }
1019
1020 INIT_LIST_HEAD(&pending);
1021 cur_sort = -1;
1022 cur_subseq = INT_MIN;
1023 cur_reg = SND_SOC_NOPM;
1024 cur_dapm = NULL;
1025 }
1026
1027 switch (w->id) {
1028 case snd_soc_dapm_pre:
1029 if (!w->event)
1030 list_for_each_entry_safe_continue(w, n, list,
1031 power_list);
1032
1033 if (event == SND_SOC_DAPM_STREAM_START)
1034 ret = w->event(w,
1035 NULL, SND_SOC_DAPM_PRE_PMU);
1036 else if (event == SND_SOC_DAPM_STREAM_STOP)
1037 ret = w->event(w,
1038 NULL, SND_SOC_DAPM_PRE_PMD);
1039 break;
1040
1041 case snd_soc_dapm_post:
1042 if (!w->event)
1043 list_for_each_entry_safe_continue(w, n, list,
1044 power_list);
1045
1046 if (event == SND_SOC_DAPM_STREAM_START)
1047 ret = w->event(w,
1048 NULL, SND_SOC_DAPM_POST_PMU);
1049 else if (event == SND_SOC_DAPM_STREAM_STOP)
1050 ret = w->event(w,
1051 NULL, SND_SOC_DAPM_POST_PMD);
1052 break;
1053
1054 default:
1055 /* Queue it up for application */
1056 cur_sort = sort[w->id];
1057 cur_subseq = w->subseq;
1058 cur_reg = w->reg;
1059 cur_dapm = w->dapm;
1060 list_move(&w->power_list, &pending);
1061 break;
1062 }
1063
1064 if (ret < 0)
1065 dev_err(w->dapm->dev,
1066 "Failed to apply widget power: %d\n", ret);
1067 }
1068
1069 if (!list_empty(&pending))
1070 dapm_seq_run_coalesced(cur_dapm, &pending);
1071
1072 if (cur_dapm && cur_dapm->seq_notifier) {
1073 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1074 if (sort[i] == cur_sort)
1075 cur_dapm->seq_notifier(cur_dapm,
1076 i, cur_subseq);
1077 }
1078}
1079
1080static void dapm_widget_update(struct snd_soc_dapm_context *dapm)
1081{
1082 struct snd_soc_dapm_update *update = dapm->update;
1083 struct snd_soc_dapm_widget *w;
1084 int ret;
1085
1086 if (!update)
1087 return;
1088
1089 w = update->widget;
1090
1091 if (w->event &&
1092 (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
1093 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
1094 if (ret != 0)
1095 pr_err("%s DAPM pre-event failed: %d\n",
1096 w->name, ret);
1097 }
1098
1099 ret = snd_soc_update_bits(w->codec, update->reg, update->mask,
1100 update->val);
1101 if (ret < 0)
1102 pr_err("%s DAPM update failed: %d\n", w->name, ret);
1103
1104 if (w->event &&
1105 (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1106 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1107 if (ret != 0)
1108 pr_err("%s DAPM post-event failed: %d\n",
1109 w->name, ret);
1110 }
1111}
1112
1113/* Async callback run prior to DAPM sequences - brings to _PREPARE if
1114 * they're changing state.
1115 */
1116static void dapm_pre_sequence_async(void *data, async_cookie_t cookie)
1117{
1118 struct snd_soc_dapm_context *d = data;
1119 int ret;
1120
1121 /* If we're off and we're not supposed to be go into STANDBY */
1122 if (d->bias_level == SND_SOC_BIAS_OFF &&
1123 d->target_bias_level != SND_SOC_BIAS_OFF) {
1124 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1125 if (ret != 0)
1126 dev_err(d->dev,
1127 "Failed to turn on bias: %d\n", ret);
1128 }
1129
1130 /* Prepare for a STADDBY->ON or ON->STANDBY transition */
1131 if (d->bias_level != d->target_bias_level) {
1132 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);
1133 if (ret != 0)
1134 dev_err(d->dev,
1135 "Failed to prepare bias: %d\n", ret);
1136 }
1137}
1138
1139/* Async callback run prior to DAPM sequences - brings to their final
1140 * state.
1141 */
1142static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
1143{
1144 struct snd_soc_dapm_context *d = data;
1145 int ret;
1146
1147 /* If we just powered the last thing off drop to standby bias */
1148 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1149 (d->target_bias_level == SND_SOC_BIAS_STANDBY ||
1150 d->target_bias_level == SND_SOC_BIAS_OFF)) {
1151 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1152 if (ret != 0)
1153 dev_err(d->dev, "Failed to apply standby bias: %d\n",
1154 ret);
1155 }
1156
1157 /* If we're in standby and can support bias off then do that */
1158 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1159 d->target_bias_level == SND_SOC_BIAS_OFF) {
1160 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);
1161 if (ret != 0)
1162 dev_err(d->dev, "Failed to turn off bias: %d\n", ret);
1163 }
1164
1165 /* If we just powered up then move to active bias */
1166 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1167 d->target_bias_level == SND_SOC_BIAS_ON) {
1168 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);
1169 if (ret != 0)
1170 dev_err(d->dev, "Failed to apply active bias: %d\n",
1171 ret);
1172 }
1173}
1174
1175/*
1176 * Scan each dapm widget for complete audio path.
1177 * A complete path is a route that has valid endpoints i.e.:-
1178 *
1179 * o DAC to output pin.
1180 * o Input Pin to ADC.
1181 * o Input pin to Output pin (bypass, sidetone)
1182 * o DAC to ADC (loopback).
1183 */
1184static int dapm_power_widgets(struct snd_soc_dapm_context *dapm, int event)
1185{
1186 struct snd_soc_card *card = dapm->card;
1187 struct snd_soc_dapm_widget *w;
1188 struct snd_soc_dapm_context *d;
1189 LIST_HEAD(up_list);
1190 LIST_HEAD(down_list);
1191 LIST_HEAD(async_domain);
1192 enum snd_soc_bias_level bias;
1193 int power;
1194
1195 trace_snd_soc_dapm_start(card);
1196
1197 list_for_each_entry(d, &card->dapm_list, list) {
1198 if (d->n_widgets || d->codec == NULL) {
1199 if (d->idle_bias_off)
1200 d->target_bias_level = SND_SOC_BIAS_OFF;
1201 else
1202 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1203 }
1204 }
1205
1206 /* Check which widgets we need to power and store them in
1207 * lists indicating if they should be powered up or down.
1208 */
1209 list_for_each_entry(w, &card->widgets, list) {
1210 switch (w->id) {
1211 case snd_soc_dapm_pre:
1212 dapm_seq_insert(w, &down_list, false);
1213 break;
1214 case snd_soc_dapm_post:
1215 dapm_seq_insert(w, &up_list, true);
1216 break;
1217
1218 default:
1219 if (!w->power_check)
1220 continue;
1221
1222 if (!w->force)
1223 power = w->power_check(w);
1224 else
1225 power = 1;
1226
1227 if (power) {
1228 d = w->dapm;
1229
1230 /* Supplies and micbiases only bring
1231 * the context up to STANDBY as unless
1232 * something else is active and
1233 * passing audio they generally don't
1234 * require full power.
1235 */
1236 switch (w->id) {
1237 case snd_soc_dapm_supply:
1238 case snd_soc_dapm_micbias:
1239 if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
1240 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1241 break;
1242 default:
1243 d->target_bias_level = SND_SOC_BIAS_ON;
1244 break;
1245 }
1246 }
1247
1248 if (w->power == power)
1249 continue;
1250
1251 trace_snd_soc_dapm_widget_power(w, power);
1252
1253 if (power)
1254 dapm_seq_insert(w, &up_list, true);
1255 else
1256 dapm_seq_insert(w, &down_list, false);
1257
1258 w->power = power;
1259 break;
1260 }
1261 }
1262
1263 /* If there are no DAPM widgets then try to figure out power from the
1264 * event type.
1265 */
1266 if (!dapm->n_widgets) {
1267 switch (event) {
1268 case SND_SOC_DAPM_STREAM_START:
1269 case SND_SOC_DAPM_STREAM_RESUME:
1270 dapm->target_bias_level = SND_SOC_BIAS_ON;
1271 break;
1272 case SND_SOC_DAPM_STREAM_STOP:
1273 if (dapm->codec->active)
1274 dapm->target_bias_level = SND_SOC_BIAS_ON;
1275 else
1276 dapm->target_bias_level = SND_SOC_BIAS_STANDBY;
1277 break;
1278 case SND_SOC_DAPM_STREAM_SUSPEND:
1279 dapm->target_bias_level = SND_SOC_BIAS_STANDBY;
1280 break;
1281 case SND_SOC_DAPM_STREAM_NOP:
1282 dapm->target_bias_level = dapm->bias_level;
1283 break;
1284 default:
1285 break;
1286 }
1287 }
1288
1289 /* Force all contexts in the card to the same bias state */
1290 bias = SND_SOC_BIAS_OFF;
1291 list_for_each_entry(d, &card->dapm_list, list)
1292 if (d->target_bias_level > bias)
1293 bias = d->target_bias_level;
1294 list_for_each_entry(d, &card->dapm_list, list)
1295 d->target_bias_level = bias;
1296
1297
1298 /* Run all the bias changes in parallel */
1299 list_for_each_entry(d, &dapm->card->dapm_list, list)
1300 async_schedule_domain(dapm_pre_sequence_async, d,
1301 &async_domain);
1302 async_synchronize_full_domain(&async_domain);
1303
1304 /* Power down widgets first; try to avoid amplifying pops. */
1305 dapm_seq_run(dapm, &down_list, event, false);
1306
1307 dapm_widget_update(dapm);
1308
1309 /* Now power up. */
1310 dapm_seq_run(dapm, &up_list, event, true);
1311
1312 /* Run all the bias changes in parallel */
1313 list_for_each_entry(d, &dapm->card->dapm_list, list)
1314 async_schedule_domain(dapm_post_sequence_async, d,
1315 &async_domain);
1316 async_synchronize_full_domain(&async_domain);
1317
1318 pop_dbg(dapm->dev, card->pop_time,
1319 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
1320 pop_wait(card->pop_time);
1321
1322 trace_snd_soc_dapm_done(card);
1323
1324 return 0;
1325}
1326
1327#ifdef CONFIG_DEBUG_FS
1328static int dapm_widget_power_open_file(struct inode *inode, struct file *file)
1329{
1330 file->private_data = inode->i_private;
1331 return 0;
1332}
1333
1334static ssize_t dapm_widget_power_read_file(struct file *file,
1335 char __user *user_buf,
1336 size_t count, loff_t *ppos)
1337{
1338 struct snd_soc_dapm_widget *w = file->private_data;
1339 char *buf;
1340 int in, out;
1341 ssize_t ret;
1342 struct snd_soc_dapm_path *p = NULL;
1343
1344 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1345 if (!buf)
1346 return -ENOMEM;
1347
1348 in = is_connected_input_ep(w);
1349 dapm_clear_walk(w->dapm);
1350 out = is_connected_output_ep(w);
1351 dapm_clear_walk(w->dapm);
1352
1353 ret = snprintf(buf, PAGE_SIZE, "%s: %s in %d out %d",
1354 w->name, w->power ? "On" : "Off", in, out);
1355
1356 if (w->reg >= 0)
1357 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1358 " - R%d(0x%x) bit %d",
1359 w->reg, w->reg, w->shift);
1360
1361 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1362
1363 if (w->sname)
1364 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1365 w->sname,
1366 w->active ? "active" : "inactive");
1367
1368 list_for_each_entry(p, &w->sources, list_sink) {
1369 if (p->connected && !p->connected(w, p->sink))
1370 continue;
1371
1372 if (p->connect)
1373 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1374 " in \"%s\" \"%s\"\n",
1375 p->name ? p->name : "static",
1376 p->source->name);
1377 }
1378 list_for_each_entry(p, &w->sinks, list_source) {
1379 if (p->connected && !p->connected(w, p->sink))
1380 continue;
1381
1382 if (p->connect)
1383 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1384 " out \"%s\" \"%s\"\n",
1385 p->name ? p->name : "static",
1386 p->sink->name);
1387 }
1388
1389 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1390
1391 kfree(buf);
1392 return ret;
1393}
1394
1395static const struct file_operations dapm_widget_power_fops = {
1396 .open = dapm_widget_power_open_file,
1397 .read = dapm_widget_power_read_file,
1398 .llseek = default_llseek,
1399};
1400
1401static int dapm_bias_open_file(struct inode *inode, struct file *file)
1402{
1403 file->private_data = inode->i_private;
1404 return 0;
1405}
1406
1407static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
1408 size_t count, loff_t *ppos)
1409{
1410 struct snd_soc_dapm_context *dapm = file->private_data;
1411 char *level;
1412
1413 switch (dapm->bias_level) {
1414 case SND_SOC_BIAS_ON:
1415 level = "On\n";
1416 break;
1417 case SND_SOC_BIAS_PREPARE:
1418 level = "Prepare\n";
1419 break;
1420 case SND_SOC_BIAS_STANDBY:
1421 level = "Standby\n";
1422 break;
1423 case SND_SOC_BIAS_OFF:
1424 level = "Off\n";
1425 break;
1426 default:
1427 BUG();
1428 level = "Unknown\n";
1429 break;
1430 }
1431
1432 return simple_read_from_buffer(user_buf, count, ppos, level,
1433 strlen(level));
1434}
1435
1436static const struct file_operations dapm_bias_fops = {
1437 .open = dapm_bias_open_file,
1438 .read = dapm_bias_read_file,
1439 .llseek = default_llseek,
1440};
1441
1442void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1443 struct dentry *parent)
1444{
1445 struct dentry *d;
1446
1447 dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
1448
1449 if (!dapm->debugfs_dapm) {
1450 printk(KERN_WARNING
1451 "Failed to create DAPM debugfs directory\n");
1452 return;
1453 }
1454
1455 d = debugfs_create_file("bias_level", 0444,
1456 dapm->debugfs_dapm, dapm,
1457 &dapm_bias_fops);
1458 if (!d)
1459 dev_warn(dapm->dev,
1460 "ASoC: Failed to create bias level debugfs file\n");
1461}
1462
1463static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1464{
1465 struct snd_soc_dapm_context *dapm = w->dapm;
1466 struct dentry *d;
1467
1468 if (!dapm->debugfs_dapm || !w->name)
1469 return;
1470
1471 d = debugfs_create_file(w->name, 0444,
1472 dapm->debugfs_dapm, w,
1473 &dapm_widget_power_fops);
1474 if (!d)
1475 dev_warn(w->dapm->dev,
1476 "ASoC: Failed to create %s debugfs file\n",
1477 w->name);
1478}
1479
1480static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1481{
1482 debugfs_remove_recursive(dapm->debugfs_dapm);
1483}
1484
1485#else
1486void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1487 struct dentry *parent)
1488{
1489}
1490
1491static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1492{
1493}
1494
1495static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1496{
1497}
1498
1499#endif
1500
1501/* test and update the power status of a mux widget */
1502static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1503 struct snd_kcontrol *kcontrol, int change,
1504 int mux, struct soc_enum *e)
1505{
1506 struct snd_soc_dapm_path *path;
1507 int found = 0;
1508
1509 if (widget->id != snd_soc_dapm_mux &&
1510 widget->id != snd_soc_dapm_virt_mux &&
1511 widget->id != snd_soc_dapm_value_mux)
1512 return -ENODEV;
1513
1514 if (!change)
1515 return 0;
1516
1517 /* find dapm widget path assoc with kcontrol */
1518 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1519 if (path->kcontrol != kcontrol)
1520 continue;
1521
1522 if (!path->name || !e->texts[mux])
1523 continue;
1524
1525 found = 1;
1526 /* we now need to match the string in the enum to the path */
1527 if (!(strcmp(path->name, e->texts[mux])))
1528 path->connect = 1; /* new connection */
1529 else
1530 path->connect = 0; /* old connection must be powered down */
1531 }
1532
1533 if (found)
1534 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1535
1536 return 0;
1537}
1538
1539/* test and update the power status of a mixer or switch widget */
1540static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1541 struct snd_kcontrol *kcontrol, int connect)
1542{
1543 struct snd_soc_dapm_path *path;
1544 int found = 0;
1545
1546 if (widget->id != snd_soc_dapm_mixer &&
1547 widget->id != snd_soc_dapm_mixer_named_ctl &&
1548 widget->id != snd_soc_dapm_switch)
1549 return -ENODEV;
1550
1551 /* find dapm widget path assoc with kcontrol */
1552 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1553 if (path->kcontrol != kcontrol)
1554 continue;
1555
1556 /* found, now check type */
1557 found = 1;
1558 path->connect = connect;
1559 break;
1560 }
1561
1562 if (found)
1563 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1564
1565 return 0;
1566}
1567
1568/* show dapm widget status in sys fs */
1569static ssize_t dapm_widget_show(struct device *dev,
1570 struct device_attribute *attr, char *buf)
1571{
1572 struct snd_soc_pcm_runtime *rtd =
1573 container_of(dev, struct snd_soc_pcm_runtime, dev);
1574 struct snd_soc_codec *codec =rtd->codec;
1575 struct snd_soc_dapm_widget *w;
1576 int count = 0;
1577 char *state = "not set";
1578
1579 list_for_each_entry(w, &codec->card->widgets, list) {
1580 if (w->dapm != &codec->dapm)
1581 continue;
1582
1583 /* only display widgets that burnm power */
1584 switch (w->id) {
1585 case snd_soc_dapm_hp:
1586 case snd_soc_dapm_mic:
1587 case snd_soc_dapm_spk:
1588 case snd_soc_dapm_line:
1589 case snd_soc_dapm_micbias:
1590 case snd_soc_dapm_dac:
1591 case snd_soc_dapm_adc:
1592 case snd_soc_dapm_pga:
1593 case snd_soc_dapm_out_drv:
1594 case snd_soc_dapm_mixer:
1595 case snd_soc_dapm_mixer_named_ctl:
1596 case snd_soc_dapm_supply:
1597 if (w->name)
1598 count += sprintf(buf + count, "%s: %s\n",
1599 w->name, w->power ? "On":"Off");
1600 break;
1601 default:
1602 break;
1603 }
1604 }
1605
1606 switch (codec->dapm.bias_level) {
1607 case SND_SOC_BIAS_ON:
1608 state = "On";
1609 break;
1610 case SND_SOC_BIAS_PREPARE:
1611 state = "Prepare";
1612 break;
1613 case SND_SOC_BIAS_STANDBY:
1614 state = "Standby";
1615 break;
1616 case SND_SOC_BIAS_OFF:
1617 state = "Off";
1618 break;
1619 }
1620 count += sprintf(buf + count, "PM State: %s\n", state);
1621
1622 return count;
1623}
1624
1625static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
1626
1627int snd_soc_dapm_sys_add(struct device *dev)
1628{
1629 return device_create_file(dev, &dev_attr_dapm_widget);
1630}
1631
1632static void snd_soc_dapm_sys_remove(struct device *dev)
1633{
1634 device_remove_file(dev, &dev_attr_dapm_widget);
1635}
1636
1637/* free all dapm widgets and resources */
1638static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
1639{
1640 struct snd_soc_dapm_widget *w, *next_w;
1641 struct snd_soc_dapm_path *p, *next_p;
1642
1643 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
1644 if (w->dapm != dapm)
1645 continue;
1646 list_del(&w->list);
1647 /*
1648 * remove source and sink paths associated to this widget.
1649 * While removing the path, remove reference to it from both
1650 * source and sink widgets so that path is removed only once.
1651 */
1652 list_for_each_entry_safe(p, next_p, &w->sources, list_sink) {
1653 list_del(&p->list_sink);
1654 list_del(&p->list_source);
1655 list_del(&p->list);
1656 kfree(p->long_name);
1657 kfree(p);
1658 }
1659 list_for_each_entry_safe(p, next_p, &w->sinks, list_source) {
1660 list_del(&p->list_sink);
1661 list_del(&p->list_source);
1662 list_del(&p->list);
1663 kfree(p->long_name);
1664 kfree(p);
1665 }
1666 kfree(w->kcontrols);
1667 kfree(w->name);
1668 kfree(w);
1669 }
1670}
1671
1672static struct snd_soc_dapm_widget *dapm_find_widget(
1673 struct snd_soc_dapm_context *dapm, const char *pin,
1674 bool search_other_contexts)
1675{
1676 struct snd_soc_dapm_widget *w;
1677 struct snd_soc_dapm_widget *fallback = NULL;
1678
1679 list_for_each_entry(w, &dapm->card->widgets, list) {
1680 if (!strcmp(w->name, pin)) {
1681 if (w->dapm == dapm)
1682 return w;
1683 else
1684 fallback = w;
1685 }
1686 }
1687
1688 if (search_other_contexts)
1689 return fallback;
1690
1691 return NULL;
1692}
1693
1694static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
1695 const char *pin, int status)
1696{
1697 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
1698
1699 if (!w) {
1700 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
1701 return -EINVAL;
1702 }
1703
1704 w->connected = status;
1705 if (status == 0)
1706 w->force = 0;
1707
1708 return 0;
1709}
1710
1711/**
1712 * snd_soc_dapm_sync - scan and power dapm paths
1713 * @dapm: DAPM context
1714 *
1715 * Walks all dapm audio paths and powers widgets according to their
1716 * stream or path usage.
1717 *
1718 * Returns 0 for success.
1719 */
1720int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
1721{
1722 return dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
1723}
1724EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
1725
1726static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
1727 const struct snd_soc_dapm_route *route)
1728{
1729 struct snd_soc_dapm_path *path;
1730 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
1731 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
1732 const char *sink;
1733 const char *control = route->control;
1734 const char *source;
1735 char prefixed_sink[80];
1736 char prefixed_source[80];
1737 int ret = 0;
1738
1739 if (dapm->codec && dapm->codec->name_prefix) {
1740 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
1741 dapm->codec->name_prefix, route->sink);
1742 sink = prefixed_sink;
1743 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
1744 dapm->codec->name_prefix, route->source);
1745 source = prefixed_source;
1746 } else {
1747 sink = route->sink;
1748 source = route->source;
1749 }
1750
1751 /*
1752 * find src and dest widgets over all widgets but favor a widget from
1753 * current DAPM context
1754 */
1755 list_for_each_entry(w, &dapm->card->widgets, list) {
1756 if (!wsink && !(strcmp(w->name, sink))) {
1757 wtsink = w;
1758 if (w->dapm == dapm)
1759 wsink = w;
1760 continue;
1761 }
1762 if (!wsource && !(strcmp(w->name, source))) {
1763 wtsource = w;
1764 if (w->dapm == dapm)
1765 wsource = w;
1766 }
1767 }
1768 /* use widget from another DAPM context if not found from this */
1769 if (!wsink)
1770 wsink = wtsink;
1771 if (!wsource)
1772 wsource = wtsource;
1773
1774 if (wsource == NULL || wsink == NULL)
1775 return -ENODEV;
1776
1777 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
1778 if (!path)
1779 return -ENOMEM;
1780
1781 path->source = wsource;
1782 path->sink = wsink;
1783 path->connected = route->connected;
1784 INIT_LIST_HEAD(&path->list);
1785 INIT_LIST_HEAD(&path->list_source);
1786 INIT_LIST_HEAD(&path->list_sink);
1787
1788 /* check for external widgets */
1789 if (wsink->id == snd_soc_dapm_input) {
1790 if (wsource->id == snd_soc_dapm_micbias ||
1791 wsource->id == snd_soc_dapm_mic ||
1792 wsource->id == snd_soc_dapm_line ||
1793 wsource->id == snd_soc_dapm_output)
1794 wsink->ext = 1;
1795 }
1796 if (wsource->id == snd_soc_dapm_output) {
1797 if (wsink->id == snd_soc_dapm_spk ||
1798 wsink->id == snd_soc_dapm_hp ||
1799 wsink->id == snd_soc_dapm_line ||
1800 wsink->id == snd_soc_dapm_input)
1801 wsource->ext = 1;
1802 }
1803
1804 /* connect static paths */
1805 if (control == NULL) {
1806 list_add(&path->list, &dapm->card->paths);
1807 list_add(&path->list_sink, &wsink->sources);
1808 list_add(&path->list_source, &wsource->sinks);
1809 path->connect = 1;
1810 return 0;
1811 }
1812
1813 /* connect dynamic paths */
1814 switch (wsink->id) {
1815 case snd_soc_dapm_adc:
1816 case snd_soc_dapm_dac:
1817 case snd_soc_dapm_pga:
1818 case snd_soc_dapm_out_drv:
1819 case snd_soc_dapm_input:
1820 case snd_soc_dapm_output:
1821 case snd_soc_dapm_micbias:
1822 case snd_soc_dapm_vmid:
1823 case snd_soc_dapm_pre:
1824 case snd_soc_dapm_post:
1825 case snd_soc_dapm_supply:
1826 case snd_soc_dapm_aif_in:
1827 case snd_soc_dapm_aif_out:
1828 list_add(&path->list, &dapm->card->paths);
1829 list_add(&path->list_sink, &wsink->sources);
1830 list_add(&path->list_source, &wsource->sinks);
1831 path->connect = 1;
1832 return 0;
1833 case snd_soc_dapm_mux:
1834 case snd_soc_dapm_virt_mux:
1835 case snd_soc_dapm_value_mux:
1836 ret = dapm_connect_mux(dapm, wsource, wsink, path, control,
1837 &wsink->kcontrol_news[0]);
1838 if (ret != 0)
1839 goto err;
1840 break;
1841 case snd_soc_dapm_switch:
1842 case snd_soc_dapm_mixer:
1843 case snd_soc_dapm_mixer_named_ctl:
1844 ret = dapm_connect_mixer(dapm, wsource, wsink, path, control);
1845 if (ret != 0)
1846 goto err;
1847 break;
1848 case snd_soc_dapm_hp:
1849 case snd_soc_dapm_mic:
1850 case snd_soc_dapm_line:
1851 case snd_soc_dapm_spk:
1852 list_add(&path->list, &dapm->card->paths);
1853 list_add(&path->list_sink, &wsink->sources);
1854 list_add(&path->list_source, &wsource->sinks);
1855 path->connect = 0;
1856 return 0;
1857 }
1858 return 0;
1859
1860err:
1861 dev_warn(dapm->dev, "asoc: no dapm match for %s --> %s --> %s\n",
1862 source, control, sink);
1863 kfree(path);
1864 return ret;
1865}
1866
1867/**
1868 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1869 * @dapm: DAPM context
1870 * @route: audio routes
1871 * @num: number of routes
1872 *
1873 * Connects 2 dapm widgets together via a named audio path. The sink is
1874 * the widget receiving the audio signal, whilst the source is the sender
1875 * of the audio signal.
1876 *
1877 * Returns 0 for success else error. On error all resources can be freed
1878 * with a call to snd_soc_card_free().
1879 */
1880int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
1881 const struct snd_soc_dapm_route *route, int num)
1882{
1883 int i, ret;
1884
1885 for (i = 0; i < num; i++) {
1886 ret = snd_soc_dapm_add_route(dapm, route);
1887 if (ret < 0) {
1888 dev_err(dapm->dev, "Failed to add route %s->%s\n",
1889 route->source, route->sink);
1890 return ret;
1891 }
1892 route++;
1893 }
1894
1895 return 0;
1896}
1897EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
1898
1899static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm,
1900 const struct snd_soc_dapm_route *route)
1901{
1902 struct snd_soc_dapm_widget *source = dapm_find_widget(dapm,
1903 route->source,
1904 true);
1905 struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm,
1906 route->sink,
1907 true);
1908 struct snd_soc_dapm_path *path;
1909 int count = 0;
1910
1911 if (!source) {
1912 dev_err(dapm->dev, "Unable to find source %s for weak route\n",
1913 route->source);
1914 return -ENODEV;
1915 }
1916
1917 if (!sink) {
1918 dev_err(dapm->dev, "Unable to find sink %s for weak route\n",
1919 route->sink);
1920 return -ENODEV;
1921 }
1922
1923 if (route->control || route->connected)
1924 dev_warn(dapm->dev, "Ignoring control for weak route %s->%s\n",
1925 route->source, route->sink);
1926
1927 list_for_each_entry(path, &source->sinks, list_source) {
1928 if (path->sink == sink) {
1929 path->weak = 1;
1930 count++;
1931 }
1932 }
1933
1934 if (count == 0)
1935 dev_err(dapm->dev, "No path found for weak route %s->%s\n",
1936 route->source, route->sink);
1937 if (count > 1)
1938 dev_warn(dapm->dev, "%d paths found for weak route %s->%s\n",
1939 count, route->source, route->sink);
1940
1941 return 0;
1942}
1943
1944/**
1945 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
1946 * @dapm: DAPM context
1947 * @route: audio routes
1948 * @num: number of routes
1949 *
1950 * Mark existing routes matching those specified in the passed array
1951 * as being weak, meaning that they are ignored for the purpose of
1952 * power decisions. The main intended use case is for sidetone paths
1953 * which couple audio between other independent paths if they are both
1954 * active in order to make the combination work better at the user
1955 * level but which aren't intended to be "used".
1956 *
1957 * Note that CODEC drivers should not use this as sidetone type paths
1958 * can frequently also be used as bypass paths.
1959 */
1960int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm,
1961 const struct snd_soc_dapm_route *route, int num)
1962{
1963 int i, err;
1964 int ret = 0;
1965
1966 for (i = 0; i < num; i++) {
1967 err = snd_soc_dapm_weak_route(dapm, route);
1968 if (err)
1969 ret = err;
1970 route++;
1971 }
1972
1973 return ret;
1974}
1975EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes);
1976
1977/**
1978 * snd_soc_dapm_new_widgets - add new dapm widgets
1979 * @dapm: DAPM context
1980 *
1981 * Checks the codec for any new dapm widgets and creates them if found.
1982 *
1983 * Returns 0 for success.
1984 */
1985int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context *dapm)
1986{
1987 struct snd_soc_dapm_widget *w;
1988 unsigned int val;
1989
1990 list_for_each_entry(w, &dapm->card->widgets, list)
1991 {
1992 if (w->new)
1993 continue;
1994
1995 if (w->num_kcontrols) {
1996 w->kcontrols = kzalloc(w->num_kcontrols *
1997 sizeof(struct snd_kcontrol *),
1998 GFP_KERNEL);
1999 if (!w->kcontrols)
2000 return -ENOMEM;
2001 }
2002
2003 switch(w->id) {
2004 case snd_soc_dapm_switch:
2005 case snd_soc_dapm_mixer:
2006 case snd_soc_dapm_mixer_named_ctl:
2007 w->power_check = dapm_generic_check_power;
2008 dapm_new_mixer(w);
2009 break;
2010 case snd_soc_dapm_mux:
2011 case snd_soc_dapm_virt_mux:
2012 case snd_soc_dapm_value_mux:
2013 w->power_check = dapm_generic_check_power;
2014 dapm_new_mux(w);
2015 break;
2016 case snd_soc_dapm_adc:
2017 case snd_soc_dapm_aif_out:
2018 w->power_check = dapm_adc_check_power;
2019 break;
2020 case snd_soc_dapm_dac:
2021 case snd_soc_dapm_aif_in:
2022 w->power_check = dapm_dac_check_power;
2023 break;
2024 case snd_soc_dapm_pga:
2025 case snd_soc_dapm_out_drv:
2026 w->power_check = dapm_generic_check_power;
2027 dapm_new_pga(w);
2028 break;
2029 case snd_soc_dapm_input:
2030 case snd_soc_dapm_output:
2031 case snd_soc_dapm_micbias:
2032 case snd_soc_dapm_spk:
2033 case snd_soc_dapm_hp:
2034 case snd_soc_dapm_mic:
2035 case snd_soc_dapm_line:
2036 w->power_check = dapm_generic_check_power;
2037 break;
2038 case snd_soc_dapm_supply:
2039 w->power_check = dapm_supply_check_power;
2040 case snd_soc_dapm_vmid:
2041 case snd_soc_dapm_pre:
2042 case snd_soc_dapm_post:
2043 break;
2044 }
2045
2046 /* Read the initial power state from the device */
2047 if (w->reg >= 0) {
2048 val = soc_widget_read(w, w->reg);
2049 val &= 1 << w->shift;
2050 if (w->invert)
2051 val = !val;
2052
2053 if (val)
2054 w->power = 1;
2055 }
2056
2057 w->new = 1;
2058
2059 dapm_debugfs_add_widget(w);
2060 }
2061
2062 dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
2063 return 0;
2064}
2065EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
2066
2067/**
2068 * snd_soc_dapm_get_volsw - dapm mixer get callback
2069 * @kcontrol: mixer control
2070 * @ucontrol: control element information
2071 *
2072 * Callback to get the value of a dapm mixer control.
2073 *
2074 * Returns 0 for success.
2075 */
2076int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
2077 struct snd_ctl_elem_value *ucontrol)
2078{
2079 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2080 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2081 struct soc_mixer_control *mc =
2082 (struct soc_mixer_control *)kcontrol->private_value;
2083 unsigned int reg = mc->reg;
2084 unsigned int shift = mc->shift;
2085 unsigned int rshift = mc->rshift;
2086 int max = mc->max;
2087 unsigned int invert = mc->invert;
2088 unsigned int mask = (1 << fls(max)) - 1;
2089
2090 ucontrol->value.integer.value[0] =
2091 (snd_soc_read(widget->codec, reg) >> shift) & mask;
2092 if (shift != rshift)
2093 ucontrol->value.integer.value[1] =
2094 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
2095 if (invert) {
2096 ucontrol->value.integer.value[0] =
2097 max - ucontrol->value.integer.value[0];
2098 if (shift != rshift)
2099 ucontrol->value.integer.value[1] =
2100 max - ucontrol->value.integer.value[1];
2101 }
2102
2103 return 0;
2104}
2105EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
2106
2107/**
2108 * snd_soc_dapm_put_volsw - dapm mixer set callback
2109 * @kcontrol: mixer control
2110 * @ucontrol: control element information
2111 *
2112 * Callback to set the value of a dapm mixer control.
2113 *
2114 * Returns 0 for success.
2115 */
2116int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
2117 struct snd_ctl_elem_value *ucontrol)
2118{
2119 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2120 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2121 struct snd_soc_codec *codec = widget->codec;
2122 struct soc_mixer_control *mc =
2123 (struct soc_mixer_control *)kcontrol->private_value;
2124 unsigned int reg = mc->reg;
2125 unsigned int shift = mc->shift;
2126 int max = mc->max;
2127 unsigned int mask = (1 << fls(max)) - 1;
2128 unsigned int invert = mc->invert;
2129 unsigned int val;
2130 int connect, change;
2131 struct snd_soc_dapm_update update;
2132 int wi;
2133
2134 val = (ucontrol->value.integer.value[0] & mask);
2135
2136 if (invert)
2137 val = max - val;
2138 mask = mask << shift;
2139 val = val << shift;
2140
2141 if (val)
2142 /* new connection */
2143 connect = invert ? 0 : 1;
2144 else
2145 /* old connection must be powered down */
2146 connect = invert ? 1 : 0;
2147
2148 mutex_lock(&codec->mutex);
2149
2150 change = snd_soc_test_bits(widget->codec, reg, mask, val);
2151 if (change) {
2152 for (wi = 0; wi < wlist->num_widgets; wi++) {
2153 widget = wlist->widgets[wi];
2154
2155 widget->value = val;
2156
2157 update.kcontrol = kcontrol;
2158 update.widget = widget;
2159 update.reg = reg;
2160 update.mask = mask;
2161 update.val = val;
2162 widget->dapm->update = &update;
2163
2164 dapm_mixer_update_power(widget, kcontrol, connect);
2165
2166 widget->dapm->update = NULL;
2167 }
2168 }
2169
2170 mutex_unlock(&codec->mutex);
2171 return 0;
2172}
2173EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
2174
2175/**
2176 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
2177 * @kcontrol: mixer control
2178 * @ucontrol: control element information
2179 *
2180 * Callback to get the value of a dapm enumerated double mixer control.
2181 *
2182 * Returns 0 for success.
2183 */
2184int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
2185 struct snd_ctl_elem_value *ucontrol)
2186{
2187 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2188 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2189 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2190 unsigned int val, bitmask;
2191
2192 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2193 ;
2194 val = snd_soc_read(widget->codec, e->reg);
2195 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
2196 if (e->shift_l != e->shift_r)
2197 ucontrol->value.enumerated.item[1] =
2198 (val >> e->shift_r) & (bitmask - 1);
2199
2200 return 0;
2201}
2202EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
2203
2204/**
2205 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
2206 * @kcontrol: mixer control
2207 * @ucontrol: control element information
2208 *
2209 * Callback to set the value of a dapm enumerated double mixer control.
2210 *
2211 * Returns 0 for success.
2212 */
2213int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
2214 struct snd_ctl_elem_value *ucontrol)
2215{
2216 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2217 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2218 struct snd_soc_codec *codec = widget->codec;
2219 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2220 unsigned int val, mux, change;
2221 unsigned int mask, bitmask;
2222 struct snd_soc_dapm_update update;
2223 int wi;
2224
2225 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2226 ;
2227 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2228 return -EINVAL;
2229 mux = ucontrol->value.enumerated.item[0];
2230 val = mux << e->shift_l;
2231 mask = (bitmask - 1) << e->shift_l;
2232 if (e->shift_l != e->shift_r) {
2233 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2234 return -EINVAL;
2235 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2236 mask |= (bitmask - 1) << e->shift_r;
2237 }
2238
2239 mutex_lock(&codec->mutex);
2240
2241 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2242 if (change) {
2243 for (wi = 0; wi < wlist->num_widgets; wi++) {
2244 widget = wlist->widgets[wi];
2245
2246 widget->value = val;
2247
2248 update.kcontrol = kcontrol;
2249 update.widget = widget;
2250 update.reg = e->reg;
2251 update.mask = mask;
2252 update.val = val;
2253 widget->dapm->update = &update;
2254
2255 dapm_mux_update_power(widget, kcontrol, change, mux, e);
2256
2257 widget->dapm->update = NULL;
2258 }
2259 }
2260
2261 mutex_unlock(&codec->mutex);
2262 return change;
2263}
2264EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
2265
2266/**
2267 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
2268 * @kcontrol: mixer control
2269 * @ucontrol: control element information
2270 *
2271 * Returns 0 for success.
2272 */
2273int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
2274 struct snd_ctl_elem_value *ucontrol)
2275{
2276 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2277 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2278
2279 ucontrol->value.enumerated.item[0] = widget->value;
2280
2281 return 0;
2282}
2283EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt);
2284
2285/**
2286 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
2287 * @kcontrol: mixer control
2288 * @ucontrol: control element information
2289 *
2290 * Returns 0 for success.
2291 */
2292int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
2293 struct snd_ctl_elem_value *ucontrol)
2294{
2295 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2296 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2297 struct snd_soc_codec *codec = widget->codec;
2298 struct soc_enum *e =
2299 (struct soc_enum *)kcontrol->private_value;
2300 int change;
2301 int ret = 0;
2302 int wi;
2303
2304 if (ucontrol->value.enumerated.item[0] >= e->max)
2305 return -EINVAL;
2306
2307 mutex_lock(&codec->mutex);
2308
2309 change = widget->value != ucontrol->value.enumerated.item[0];
2310 if (change) {
2311 for (wi = 0; wi < wlist->num_widgets; wi++) {
2312 widget = wlist->widgets[wi];
2313
2314 widget->value = ucontrol->value.enumerated.item[0];
2315
2316 dapm_mux_update_power(widget, kcontrol, change,
2317 widget->value, e);
2318 }
2319 }
2320
2321 mutex_unlock(&codec->mutex);
2322 return ret;
2323}
2324EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt);
2325
2326/**
2327 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
2328 * callback
2329 * @kcontrol: mixer control
2330 * @ucontrol: control element information
2331 *
2332 * Callback to get the value of a dapm semi enumerated double mixer control.
2333 *
2334 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2335 * used for handling bitfield coded enumeration for example.
2336 *
2337 * Returns 0 for success.
2338 */
2339int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
2340 struct snd_ctl_elem_value *ucontrol)
2341{
2342 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2343 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2344 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2345 unsigned int reg_val, val, mux;
2346
2347 reg_val = snd_soc_read(widget->codec, e->reg);
2348 val = (reg_val >> e->shift_l) & e->mask;
2349 for (mux = 0; mux < e->max; mux++) {
2350 if (val == e->values[mux])
2351 break;
2352 }
2353 ucontrol->value.enumerated.item[0] = mux;
2354 if (e->shift_l != e->shift_r) {
2355 val = (reg_val >> e->shift_r) & e->mask;
2356 for (mux = 0; mux < e->max; mux++) {
2357 if (val == e->values[mux])
2358 break;
2359 }
2360 ucontrol->value.enumerated.item[1] = mux;
2361 }
2362
2363 return 0;
2364}
2365EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
2366
2367/**
2368 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
2369 * callback
2370 * @kcontrol: mixer control
2371 * @ucontrol: control element information
2372 *
2373 * Callback to set the value of a dapm semi enumerated double mixer control.
2374 *
2375 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2376 * used for handling bitfield coded enumeration for example.
2377 *
2378 * Returns 0 for success.
2379 */
2380int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
2381 struct snd_ctl_elem_value *ucontrol)
2382{
2383 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2384 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2385 struct snd_soc_codec *codec = widget->codec;
2386 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2387 unsigned int val, mux, change;
2388 unsigned int mask;
2389 struct snd_soc_dapm_update update;
2390 int wi;
2391
2392 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2393 return -EINVAL;
2394 mux = ucontrol->value.enumerated.item[0];
2395 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2396 mask = e->mask << e->shift_l;
2397 if (e->shift_l != e->shift_r) {
2398 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2399 return -EINVAL;
2400 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2401 mask |= e->mask << e->shift_r;
2402 }
2403
2404 mutex_lock(&codec->mutex);
2405
2406 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2407 if (change) {
2408 for (wi = 0; wi < wlist->num_widgets; wi++) {
2409 widget = wlist->widgets[wi];
2410
2411 widget->value = val;
2412
2413 update.kcontrol = kcontrol;
2414 update.widget = widget;
2415 update.reg = e->reg;
2416 update.mask = mask;
2417 update.val = val;
2418 widget->dapm->update = &update;
2419
2420 dapm_mux_update_power(widget, kcontrol, change, mux, e);
2421
2422 widget->dapm->update = NULL;
2423 }
2424 }
2425
2426 mutex_unlock(&codec->mutex);
2427 return change;
2428}
2429EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
2430
2431/**
2432 * snd_soc_dapm_info_pin_switch - Info for a pin switch
2433 *
2434 * @kcontrol: mixer control
2435 * @uinfo: control element information
2436 *
2437 * Callback to provide information about a pin switch control.
2438 */
2439int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
2440 struct snd_ctl_elem_info *uinfo)
2441{
2442 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2443 uinfo->count = 1;
2444 uinfo->value.integer.min = 0;
2445 uinfo->value.integer.max = 1;
2446
2447 return 0;
2448}
2449EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
2450
2451/**
2452 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
2453 *
2454 * @kcontrol: mixer control
2455 * @ucontrol: Value
2456 */
2457int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
2458 struct snd_ctl_elem_value *ucontrol)
2459{
2460 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2461 const char *pin = (const char *)kcontrol->private_value;
2462
2463 mutex_lock(&codec->mutex);
2464
2465 ucontrol->value.integer.value[0] =
2466 snd_soc_dapm_get_pin_status(&codec->dapm, pin);
2467
2468 mutex_unlock(&codec->mutex);
2469
2470 return 0;
2471}
2472EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
2473
2474/**
2475 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
2476 *
2477 * @kcontrol: mixer control
2478 * @ucontrol: Value
2479 */
2480int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
2481 struct snd_ctl_elem_value *ucontrol)
2482{
2483 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2484 const char *pin = (const char *)kcontrol->private_value;
2485
2486 mutex_lock(&codec->mutex);
2487
2488 if (ucontrol->value.integer.value[0])
2489 snd_soc_dapm_enable_pin(&codec->dapm, pin);
2490 else
2491 snd_soc_dapm_disable_pin(&codec->dapm, pin);
2492
2493 snd_soc_dapm_sync(&codec->dapm);
2494
2495 mutex_unlock(&codec->mutex);
2496
2497 return 0;
2498}
2499EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
2500
2501/**
2502 * snd_soc_dapm_new_control - create new dapm control
2503 * @dapm: DAPM context
2504 * @widget: widget template
2505 *
2506 * Creates a new dapm control based upon the template.
2507 *
2508 * Returns 0 for success else error.
2509 */
2510int snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
2511 const struct snd_soc_dapm_widget *widget)
2512{
2513 struct snd_soc_dapm_widget *w;
2514 size_t name_len;
2515
2516 if ((w = dapm_cnew_widget(widget)) == NULL)
2517 return -ENOMEM;
2518
2519 name_len = strlen(widget->name) + 1;
2520 if (dapm->codec && dapm->codec->name_prefix)
2521 name_len += 1 + strlen(dapm->codec->name_prefix);
2522 w->name = kmalloc(name_len, GFP_KERNEL);
2523 if (w->name == NULL) {
2524 kfree(w);
2525 return -ENOMEM;
2526 }
2527 if (dapm->codec && dapm->codec->name_prefix)
2528 snprintf(w->name, name_len, "%s %s",
2529 dapm->codec->name_prefix, widget->name);
2530 else
2531 snprintf(w->name, name_len, "%s", widget->name);
2532
2533 dapm->n_widgets++;
2534 w->dapm = dapm;
2535 w->codec = dapm->codec;
2536 w->platform = dapm->platform;
2537 INIT_LIST_HEAD(&w->sources);
2538 INIT_LIST_HEAD(&w->sinks);
2539 INIT_LIST_HEAD(&w->list);
2540 list_add(&w->list, &dapm->card->widgets);
2541
2542 /* machine layer set ups unconnected pins and insertions */
2543 w->connected = 1;
2544 return 0;
2545}
2546EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
2547
2548/**
2549 * snd_soc_dapm_new_controls - create new dapm controls
2550 * @dapm: DAPM context
2551 * @widget: widget array
2552 * @num: number of widgets
2553 *
2554 * Creates new DAPM controls based upon the templates.
2555 *
2556 * Returns 0 for success else error.
2557 */
2558int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
2559 const struct snd_soc_dapm_widget *widget,
2560 int num)
2561{
2562 int i, ret;
2563
2564 for (i = 0; i < num; i++) {
2565 ret = snd_soc_dapm_new_control(dapm, widget);
2566 if (ret < 0) {
2567 dev_err(dapm->dev,
2568 "ASoC: Failed to create DAPM control %s: %d\n",
2569 widget->name, ret);
2570 return ret;
2571 }
2572 widget++;
2573 }
2574 return 0;
2575}
2576EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
2577
2578static void soc_dapm_stream_event(struct snd_soc_dapm_context *dapm,
2579 const char *stream, int event)
2580{
2581 struct snd_soc_dapm_widget *w;
2582
2583 list_for_each_entry(w, &dapm->card->widgets, list)
2584 {
2585 if (!w->sname || w->dapm != dapm)
2586 continue;
2587 dev_dbg(w->dapm->dev, "widget %s\n %s stream %s event %d\n",
2588 w->name, w->sname, stream, event);
2589 if (strstr(w->sname, stream)) {
2590 switch(event) {
2591 case SND_SOC_DAPM_STREAM_START:
2592 w->active = 1;
2593 break;
2594 case SND_SOC_DAPM_STREAM_STOP:
2595 w->active = 0;
2596 break;
2597 case SND_SOC_DAPM_STREAM_SUSPEND:
2598 case SND_SOC_DAPM_STREAM_RESUME:
2599 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
2600 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
2601 break;
2602 }
2603 }
2604 }
2605
2606 dapm_power_widgets(dapm, event);
2607}
2608
2609/**
2610 * snd_soc_dapm_stream_event - send a stream event to the dapm core
2611 * @rtd: PCM runtime data
2612 * @stream: stream name
2613 * @event: stream event
2614 *
2615 * Sends a stream event to the dapm core. The core then makes any
2616 * necessary widget power changes.
2617 *
2618 * Returns 0 for success else error.
2619 */
2620int snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd,
2621 const char *stream, int event)
2622{
2623 struct snd_soc_codec *codec = rtd->codec;
2624
2625 if (stream == NULL)
2626 return 0;
2627
2628 mutex_lock(&codec->mutex);
2629 soc_dapm_stream_event(&codec->dapm, stream, event);
2630 mutex_unlock(&codec->mutex);
2631 return 0;
2632}
2633
2634/**
2635 * snd_soc_dapm_enable_pin - enable pin.
2636 * @dapm: DAPM context
2637 * @pin: pin name
2638 *
2639 * Enables input/output pin and its parents or children widgets iff there is
2640 * a valid audio route and active audio stream.
2641 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2642 * do any widget power switching.
2643 */
2644int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
2645{
2646 return snd_soc_dapm_set_pin(dapm, pin, 1);
2647}
2648EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
2649
2650/**
2651 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
2652 * @dapm: DAPM context
2653 * @pin: pin name
2654 *
2655 * Enables input/output pin regardless of any other state. This is
2656 * intended for use with microphone bias supplies used in microphone
2657 * jack detection.
2658 *
2659 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2660 * do any widget power switching.
2661 */
2662int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
2663 const char *pin)
2664{
2665 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2666
2667 if (!w) {
2668 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
2669 return -EINVAL;
2670 }
2671
2672 dev_dbg(w->dapm->dev, "dapm: force enable pin %s\n", pin);
2673 w->connected = 1;
2674 w->force = 1;
2675
2676 return 0;
2677}
2678EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
2679
2680/**
2681 * snd_soc_dapm_disable_pin - disable pin.
2682 * @dapm: DAPM context
2683 * @pin: pin name
2684 *
2685 * Disables input/output pin and its parents or children widgets.
2686 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2687 * do any widget power switching.
2688 */
2689int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
2690 const char *pin)
2691{
2692 return snd_soc_dapm_set_pin(dapm, pin, 0);
2693}
2694EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
2695
2696/**
2697 * snd_soc_dapm_nc_pin - permanently disable pin.
2698 * @dapm: DAPM context
2699 * @pin: pin name
2700 *
2701 * Marks the specified pin as being not connected, disabling it along
2702 * any parent or child widgets. At present this is identical to
2703 * snd_soc_dapm_disable_pin() but in future it will be extended to do
2704 * additional things such as disabling controls which only affect
2705 * paths through the pin.
2706 *
2707 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2708 * do any widget power switching.
2709 */
2710int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
2711{
2712 return snd_soc_dapm_set_pin(dapm, pin, 0);
2713}
2714EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
2715
2716/**
2717 * snd_soc_dapm_get_pin_status - get audio pin status
2718 * @dapm: DAPM context
2719 * @pin: audio signal pin endpoint (or start point)
2720 *
2721 * Get audio pin status - connected or disconnected.
2722 *
2723 * Returns 1 for connected otherwise 0.
2724 */
2725int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
2726 const char *pin)
2727{
2728 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2729
2730 if (w)
2731 return w->connected;
2732
2733 return 0;
2734}
2735EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
2736
2737/**
2738 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
2739 * @dapm: DAPM context
2740 * @pin: audio signal pin endpoint (or start point)
2741 *
2742 * Mark the given endpoint or pin as ignoring suspend. When the
2743 * system is disabled a path between two endpoints flagged as ignoring
2744 * suspend will not be disabled. The path must already be enabled via
2745 * normal means at suspend time, it will not be turned on if it was not
2746 * already enabled.
2747 */
2748int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
2749 const char *pin)
2750{
2751 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
2752
2753 if (!w) {
2754 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
2755 return -EINVAL;
2756 }
2757
2758 w->ignore_suspend = 1;
2759
2760 return 0;
2761}
2762EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
2763
2764/**
2765 * snd_soc_dapm_free - free dapm resources
2766 * @dapm: DAPM context
2767 *
2768 * Free all dapm widgets and resources.
2769 */
2770void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
2771{
2772 snd_soc_dapm_sys_remove(dapm->dev);
2773 dapm_debugfs_cleanup(dapm);
2774 dapm_free_widgets(dapm);
2775 list_del(&dapm->list);
2776}
2777EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
2778
2779static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context *dapm)
2780{
2781 struct snd_soc_dapm_widget *w;
2782 LIST_HEAD(down_list);
2783 int powerdown = 0;
2784
2785 list_for_each_entry(w, &dapm->card->widgets, list) {
2786 if (w->dapm != dapm)
2787 continue;
2788 if (w->power) {
2789 dapm_seq_insert(w, &down_list, false);
2790 w->power = 0;
2791 powerdown = 1;
2792 }
2793 }
2794
2795 /* If there were no widgets to power down we're already in
2796 * standby.
2797 */
2798 if (powerdown) {
2799 snd_soc_dapm_set_bias_level(dapm, SND_SOC_BIAS_PREPARE);
2800 dapm_seq_run(dapm, &down_list, 0, false);
2801 snd_soc_dapm_set_bias_level(dapm, SND_SOC_BIAS_STANDBY);
2802 }
2803}
2804
2805/*
2806 * snd_soc_dapm_shutdown - callback for system shutdown
2807 */
2808void snd_soc_dapm_shutdown(struct snd_soc_card *card)
2809{
2810 struct snd_soc_codec *codec;
2811
2812 list_for_each_entry(codec, &card->codec_dev_list, list) {
2813 soc_dapm_shutdown_codec(&codec->dapm);
2814 snd_soc_dapm_set_bias_level(&codec->dapm, SND_SOC_BIAS_OFF);
2815 }
2816}
2817
2818/* Module information */
2819MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2820MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
2821MODULE_LICENSE("GPL");
1// SPDX-License-Identifier: GPL-2.0+
2//
3// soc-dapm.c -- ALSA SoC Dynamic Audio Power Management
4//
5// Copyright 2005 Wolfson Microelectronics PLC.
6// Author: Liam Girdwood <lrg@slimlogic.co.uk>
7//
8// Features:
9// o Changes power status of internal codec blocks depending on the
10// dynamic configuration of codec internal audio paths and active
11// DACs/ADCs.
12// o Platform power domain - can support external components i.e. amps and
13// mic/headphone insertion events.
14// o Automatic Mic Bias support
15// o Jack insertion power event initiation - e.g. hp insertion will enable
16// sinks, dacs, etc
17// o Delayed power down of audio subsystem to reduce pops between a quick
18// device reopen.
19
20#include <linux/module.h>
21#include <linux/init.h>
22#include <linux/async.h>
23#include <linux/delay.h>
24#include <linux/pm.h>
25#include <linux/bitops.h>
26#include <linux/platform_device.h>
27#include <linux/jiffies.h>
28#include <linux/debugfs.h>
29#include <linux/pm_runtime.h>
30#include <linux/regulator/consumer.h>
31#include <linux/pinctrl/consumer.h>
32#include <linux/clk.h>
33#include <linux/slab.h>
34#include <sound/core.h>
35#include <sound/pcm.h>
36#include <sound/pcm_params.h>
37#include <sound/soc.h>
38#include <sound/initval.h>
39
40#include <trace/events/asoc.h>
41
42#define DAPM_UPDATE_STAT(widget, val) widget->dapm->card->dapm_stats.val++;
43
44#define SND_SOC_DAPM_DIR_REVERSE(x) ((x == SND_SOC_DAPM_DIR_IN) ? \
45 SND_SOC_DAPM_DIR_OUT : SND_SOC_DAPM_DIR_IN)
46
47#define snd_soc_dapm_for_each_direction(dir) \
48 for ((dir) = SND_SOC_DAPM_DIR_IN; (dir) <= SND_SOC_DAPM_DIR_OUT; \
49 (dir)++)
50
51static int snd_soc_dapm_add_path(struct snd_soc_dapm_context *dapm,
52 struct snd_soc_dapm_widget *wsource, struct snd_soc_dapm_widget *wsink,
53 const char *control,
54 int (*connected)(struct snd_soc_dapm_widget *source,
55 struct snd_soc_dapm_widget *sink));
56
57struct snd_soc_dapm_widget *
58snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
59 const struct snd_soc_dapm_widget *widget);
60
61struct snd_soc_dapm_widget *
62snd_soc_dapm_new_control_unlocked(struct snd_soc_dapm_context *dapm,
63 const struct snd_soc_dapm_widget *widget);
64
65static unsigned int soc_dapm_read(struct snd_soc_dapm_context *dapm, int reg);
66
67/* dapm power sequences - make this per codec in the future */
68static int dapm_up_seq[] = {
69 [snd_soc_dapm_pre] = 1,
70 [snd_soc_dapm_regulator_supply] = 2,
71 [snd_soc_dapm_pinctrl] = 2,
72 [snd_soc_dapm_clock_supply] = 2,
73 [snd_soc_dapm_supply] = 3,
74 [snd_soc_dapm_dai_link] = 3,
75 [snd_soc_dapm_micbias] = 4,
76 [snd_soc_dapm_vmid] = 4,
77 [snd_soc_dapm_dai_in] = 5,
78 [snd_soc_dapm_dai_out] = 5,
79 [snd_soc_dapm_aif_in] = 5,
80 [snd_soc_dapm_aif_out] = 5,
81 [snd_soc_dapm_mic] = 6,
82 [snd_soc_dapm_siggen] = 6,
83 [snd_soc_dapm_input] = 6,
84 [snd_soc_dapm_output] = 6,
85 [snd_soc_dapm_mux] = 7,
86 [snd_soc_dapm_demux] = 7,
87 [snd_soc_dapm_dac] = 8,
88 [snd_soc_dapm_switch] = 9,
89 [snd_soc_dapm_mixer] = 9,
90 [snd_soc_dapm_mixer_named_ctl] = 9,
91 [snd_soc_dapm_pga] = 10,
92 [snd_soc_dapm_buffer] = 10,
93 [snd_soc_dapm_scheduler] = 10,
94 [snd_soc_dapm_effect] = 10,
95 [snd_soc_dapm_src] = 10,
96 [snd_soc_dapm_asrc] = 10,
97 [snd_soc_dapm_encoder] = 10,
98 [snd_soc_dapm_decoder] = 10,
99 [snd_soc_dapm_adc] = 11,
100 [snd_soc_dapm_out_drv] = 12,
101 [snd_soc_dapm_hp] = 12,
102 [snd_soc_dapm_line] = 12,
103 [snd_soc_dapm_sink] = 12,
104 [snd_soc_dapm_spk] = 13,
105 [snd_soc_dapm_kcontrol] = 14,
106 [snd_soc_dapm_post] = 15,
107};
108
109static int dapm_down_seq[] = {
110 [snd_soc_dapm_pre] = 1,
111 [snd_soc_dapm_kcontrol] = 2,
112 [snd_soc_dapm_adc] = 3,
113 [snd_soc_dapm_spk] = 4,
114 [snd_soc_dapm_hp] = 5,
115 [snd_soc_dapm_line] = 5,
116 [snd_soc_dapm_out_drv] = 5,
117 [snd_soc_dapm_sink] = 6,
118 [snd_soc_dapm_pga] = 6,
119 [snd_soc_dapm_buffer] = 6,
120 [snd_soc_dapm_scheduler] = 6,
121 [snd_soc_dapm_effect] = 6,
122 [snd_soc_dapm_src] = 6,
123 [snd_soc_dapm_asrc] = 6,
124 [snd_soc_dapm_encoder] = 6,
125 [snd_soc_dapm_decoder] = 6,
126 [snd_soc_dapm_switch] = 7,
127 [snd_soc_dapm_mixer_named_ctl] = 7,
128 [snd_soc_dapm_mixer] = 7,
129 [snd_soc_dapm_dac] = 8,
130 [snd_soc_dapm_mic] = 9,
131 [snd_soc_dapm_siggen] = 9,
132 [snd_soc_dapm_input] = 9,
133 [snd_soc_dapm_output] = 9,
134 [snd_soc_dapm_micbias] = 10,
135 [snd_soc_dapm_vmid] = 10,
136 [snd_soc_dapm_mux] = 11,
137 [snd_soc_dapm_demux] = 11,
138 [snd_soc_dapm_aif_in] = 12,
139 [snd_soc_dapm_aif_out] = 12,
140 [snd_soc_dapm_dai_in] = 12,
141 [snd_soc_dapm_dai_out] = 12,
142 [snd_soc_dapm_dai_link] = 13,
143 [snd_soc_dapm_supply] = 14,
144 [snd_soc_dapm_clock_supply] = 15,
145 [snd_soc_dapm_pinctrl] = 15,
146 [snd_soc_dapm_regulator_supply] = 15,
147 [snd_soc_dapm_post] = 16,
148};
149
150static void dapm_assert_locked(struct snd_soc_dapm_context *dapm)
151{
152 if (snd_soc_card_is_instantiated(dapm->card))
153 snd_soc_dapm_mutex_assert_held(dapm);
154}
155
156static void pop_wait(u32 pop_time)
157{
158 if (pop_time)
159 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
160}
161
162__printf(3, 4)
163static void pop_dbg(struct device *dev, u32 pop_time, const char *fmt, ...)
164{
165 va_list args;
166 char *buf;
167
168 if (!pop_time)
169 return;
170
171 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
172 if (buf == NULL)
173 return;
174
175 va_start(args, fmt);
176 vsnprintf(buf, PAGE_SIZE, fmt, args);
177 dev_info(dev, "%s", buf);
178 va_end(args);
179
180 kfree(buf);
181}
182
183static bool dapm_dirty_widget(struct snd_soc_dapm_widget *w)
184{
185 return !list_empty(&w->dirty);
186}
187
188static void dapm_mark_dirty(struct snd_soc_dapm_widget *w, const char *reason)
189{
190 dapm_assert_locked(w->dapm);
191
192 if (!dapm_dirty_widget(w)) {
193 dev_vdbg(w->dapm->dev, "Marking %s dirty due to %s\n",
194 w->name, reason);
195 list_add_tail(&w->dirty, &w->dapm->card->dapm_dirty);
196 }
197}
198
199/*
200 * Common implementation for dapm_widget_invalidate_input_paths() and
201 * dapm_widget_invalidate_output_paths(). The function is inlined since the
202 * combined size of the two specialized functions is only marginally larger then
203 * the size of the generic function and at the same time the fast path of the
204 * specialized functions is significantly smaller than the generic function.
205 */
206static __always_inline void dapm_widget_invalidate_paths(
207 struct snd_soc_dapm_widget *w, enum snd_soc_dapm_direction dir)
208{
209 enum snd_soc_dapm_direction rdir = SND_SOC_DAPM_DIR_REVERSE(dir);
210 struct snd_soc_dapm_widget *node;
211 struct snd_soc_dapm_path *p;
212 LIST_HEAD(list);
213
214 dapm_assert_locked(w->dapm);
215
216 if (w->endpoints[dir] == -1)
217 return;
218
219 list_add_tail(&w->work_list, &list);
220 w->endpoints[dir] = -1;
221
222 list_for_each_entry(w, &list, work_list) {
223 snd_soc_dapm_widget_for_each_path(w, dir, p) {
224 if (p->is_supply || p->weak || !p->connect)
225 continue;
226 node = p->node[rdir];
227 if (node->endpoints[dir] != -1) {
228 node->endpoints[dir] = -1;
229 list_add_tail(&node->work_list, &list);
230 }
231 }
232 }
233}
234
235/*
236 * dapm_widget_invalidate_input_paths() - Invalidate the cached number of
237 * input paths
238 * @w: The widget for which to invalidate the cached number of input paths
239 *
240 * Resets the cached number of inputs for the specified widget and all widgets
241 * that can be reached via outcoming paths from the widget.
242 *
243 * This function must be called if the number of output paths for a widget might
244 * have changed. E.g. if the source state of a widget changes or a path is added
245 * or activated with the widget as the sink.
246 */
247static void dapm_widget_invalidate_input_paths(struct snd_soc_dapm_widget *w)
248{
249 dapm_widget_invalidate_paths(w, SND_SOC_DAPM_DIR_IN);
250}
251
252/*
253 * dapm_widget_invalidate_output_paths() - Invalidate the cached number of
254 * output paths
255 * @w: The widget for which to invalidate the cached number of output paths
256 *
257 * Resets the cached number of outputs for the specified widget and all widgets
258 * that can be reached via incoming paths from the widget.
259 *
260 * This function must be called if the number of output paths for a widget might
261 * have changed. E.g. if the sink state of a widget changes or a path is added
262 * or activated with the widget as the source.
263 */
264static void dapm_widget_invalidate_output_paths(struct snd_soc_dapm_widget *w)
265{
266 dapm_widget_invalidate_paths(w, SND_SOC_DAPM_DIR_OUT);
267}
268
269/*
270 * dapm_path_invalidate() - Invalidates the cached number of inputs and outputs
271 * for the widgets connected to a path
272 * @p: The path to invalidate
273 *
274 * Resets the cached number of inputs for the sink of the path and the cached
275 * number of outputs for the source of the path.
276 *
277 * This function must be called when a path is added, removed or the connected
278 * state changes.
279 */
280static void dapm_path_invalidate(struct snd_soc_dapm_path *p)
281{
282 /*
283 * Weak paths or supply paths do not influence the number of input or
284 * output paths of their neighbors.
285 */
286 if (p->weak || p->is_supply)
287 return;
288
289 /*
290 * The number of connected endpoints is the sum of the number of
291 * connected endpoints of all neighbors. If a node with 0 connected
292 * endpoints is either connected or disconnected that sum won't change,
293 * so there is no need to re-check the path.
294 */
295 if (p->source->endpoints[SND_SOC_DAPM_DIR_IN] != 0)
296 dapm_widget_invalidate_input_paths(p->sink);
297 if (p->sink->endpoints[SND_SOC_DAPM_DIR_OUT] != 0)
298 dapm_widget_invalidate_output_paths(p->source);
299}
300
301void dapm_mark_endpoints_dirty(struct snd_soc_card *card)
302{
303 struct snd_soc_dapm_widget *w;
304
305 snd_soc_dapm_mutex_lock_root(card);
306
307 for_each_card_widgets(card, w) {
308 if (w->is_ep) {
309 dapm_mark_dirty(w, "Rechecking endpoints");
310 if (w->is_ep & SND_SOC_DAPM_EP_SINK)
311 dapm_widget_invalidate_output_paths(w);
312 if (w->is_ep & SND_SOC_DAPM_EP_SOURCE)
313 dapm_widget_invalidate_input_paths(w);
314 }
315 }
316
317 snd_soc_dapm_mutex_unlock(card);
318}
319EXPORT_SYMBOL_GPL(dapm_mark_endpoints_dirty);
320
321/* create a new dapm widget */
322static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
323 const struct snd_soc_dapm_widget *_widget,
324 const char *prefix)
325{
326 struct snd_soc_dapm_widget *w;
327
328 w = kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
329 if (!w)
330 return NULL;
331
332 if (prefix)
333 w->name = kasprintf(GFP_KERNEL, "%s %s", prefix, _widget->name);
334 else
335 w->name = kstrdup_const(_widget->name, GFP_KERNEL);
336 if (!w->name) {
337 kfree(w);
338 return NULL;
339 }
340
341 if (_widget->sname) {
342 w->sname = kstrdup_const(_widget->sname, GFP_KERNEL);
343 if (!w->sname) {
344 kfree_const(w->name);
345 kfree(w);
346 return NULL;
347 }
348 }
349 return w;
350}
351
352struct dapm_kcontrol_data {
353 unsigned int value;
354 struct snd_soc_dapm_widget *widget;
355 struct list_head paths;
356 struct snd_soc_dapm_widget_list *wlist;
357};
358
359static int dapm_kcontrol_data_alloc(struct snd_soc_dapm_widget *widget,
360 struct snd_kcontrol *kcontrol, const char *ctrl_name)
361{
362 struct dapm_kcontrol_data *data;
363 struct soc_mixer_control *mc;
364 struct soc_enum *e;
365 const char *name;
366 int ret;
367
368 data = kzalloc(sizeof(*data), GFP_KERNEL);
369 if (!data)
370 return -ENOMEM;
371
372 INIT_LIST_HEAD(&data->paths);
373
374 switch (widget->id) {
375 case snd_soc_dapm_switch:
376 case snd_soc_dapm_mixer:
377 case snd_soc_dapm_mixer_named_ctl:
378 mc = (struct soc_mixer_control *)kcontrol->private_value;
379
380 if (mc->autodisable) {
381 struct snd_soc_dapm_widget template;
382
383 if (snd_soc_volsw_is_stereo(mc))
384 dev_warn(widget->dapm->dev,
385 "ASoC: Unsupported stereo autodisable control '%s'\n",
386 ctrl_name);
387
388 name = kasprintf(GFP_KERNEL, "%s %s", ctrl_name,
389 "Autodisable");
390 if (!name) {
391 ret = -ENOMEM;
392 goto err_data;
393 }
394
395 memset(&template, 0, sizeof(template));
396 template.reg = mc->reg;
397 template.mask = (1 << fls(mc->max)) - 1;
398 template.shift = mc->shift;
399 if (mc->invert)
400 template.off_val = mc->max;
401 else
402 template.off_val = 0;
403 template.on_val = template.off_val;
404 template.id = snd_soc_dapm_kcontrol;
405 template.name = name;
406
407 data->value = template.on_val;
408
409 data->widget =
410 snd_soc_dapm_new_control_unlocked(widget->dapm,
411 &template);
412 kfree(name);
413 if (IS_ERR(data->widget)) {
414 ret = PTR_ERR(data->widget);
415 goto err_data;
416 }
417 }
418 break;
419 case snd_soc_dapm_demux:
420 case snd_soc_dapm_mux:
421 e = (struct soc_enum *)kcontrol->private_value;
422
423 if (e->autodisable) {
424 struct snd_soc_dapm_widget template;
425
426 name = kasprintf(GFP_KERNEL, "%s %s", ctrl_name,
427 "Autodisable");
428 if (!name) {
429 ret = -ENOMEM;
430 goto err_data;
431 }
432
433 memset(&template, 0, sizeof(template));
434 template.reg = e->reg;
435 template.mask = e->mask;
436 template.shift = e->shift_l;
437 template.off_val = snd_soc_enum_item_to_val(e, 0);
438 template.on_val = template.off_val;
439 template.id = snd_soc_dapm_kcontrol;
440 template.name = name;
441
442 data->value = template.on_val;
443
444 data->widget = snd_soc_dapm_new_control_unlocked(
445 widget->dapm, &template);
446 kfree(name);
447 if (IS_ERR(data->widget)) {
448 ret = PTR_ERR(data->widget);
449 goto err_data;
450 }
451
452 snd_soc_dapm_add_path(widget->dapm, data->widget,
453 widget, NULL, NULL);
454 } else if (e->reg != SND_SOC_NOPM) {
455 data->value = soc_dapm_read(widget->dapm, e->reg) &
456 (e->mask << e->shift_l);
457 }
458 break;
459 default:
460 break;
461 }
462
463 kcontrol->private_data = data;
464
465 return 0;
466
467err_data:
468 kfree(data);
469 return ret;
470}
471
472static void dapm_kcontrol_free(struct snd_kcontrol *kctl)
473{
474 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kctl);
475
476 list_del(&data->paths);
477 kfree(data->wlist);
478 kfree(data);
479}
480
481static struct snd_soc_dapm_widget_list *dapm_kcontrol_get_wlist(
482 const struct snd_kcontrol *kcontrol)
483{
484 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
485
486 return data->wlist;
487}
488
489static int dapm_kcontrol_add_widget(struct snd_kcontrol *kcontrol,
490 struct snd_soc_dapm_widget *widget)
491{
492 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
493 struct snd_soc_dapm_widget_list *new_wlist;
494 unsigned int n;
495
496 if (data->wlist)
497 n = data->wlist->num_widgets + 1;
498 else
499 n = 1;
500
501 new_wlist = krealloc(data->wlist,
502 struct_size(new_wlist, widgets, n),
503 GFP_KERNEL);
504 if (!new_wlist)
505 return -ENOMEM;
506
507 new_wlist->num_widgets = n;
508 new_wlist->widgets[n - 1] = widget;
509
510 data->wlist = new_wlist;
511
512 return 0;
513}
514
515static void dapm_kcontrol_add_path(const struct snd_kcontrol *kcontrol,
516 struct snd_soc_dapm_path *path)
517{
518 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
519
520 list_add_tail(&path->list_kcontrol, &data->paths);
521}
522
523static bool dapm_kcontrol_is_powered(const struct snd_kcontrol *kcontrol)
524{
525 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
526
527 if (!data->widget)
528 return true;
529
530 return data->widget->power;
531}
532
533static struct list_head *dapm_kcontrol_get_path_list(
534 const struct snd_kcontrol *kcontrol)
535{
536 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
537
538 return &data->paths;
539}
540
541#define dapm_kcontrol_for_each_path(path, kcontrol) \
542 list_for_each_entry(path, dapm_kcontrol_get_path_list(kcontrol), \
543 list_kcontrol)
544
545unsigned int dapm_kcontrol_get_value(const struct snd_kcontrol *kcontrol)
546{
547 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
548
549 return data->value;
550}
551EXPORT_SYMBOL_GPL(dapm_kcontrol_get_value);
552
553static bool dapm_kcontrol_set_value(const struct snd_kcontrol *kcontrol,
554 unsigned int value)
555{
556 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
557
558 if (data->value == value)
559 return false;
560
561 if (data->widget) {
562 switch (dapm_kcontrol_get_wlist(kcontrol)->widgets[0]->id) {
563 case snd_soc_dapm_switch:
564 case snd_soc_dapm_mixer:
565 case snd_soc_dapm_mixer_named_ctl:
566 data->widget->on_val = value & data->widget->mask;
567 break;
568 case snd_soc_dapm_demux:
569 case snd_soc_dapm_mux:
570 data->widget->on_val = value >> data->widget->shift;
571 break;
572 default:
573 data->widget->on_val = value;
574 break;
575 }
576 }
577
578 data->value = value;
579
580 return true;
581}
582
583/**
584 * snd_soc_dapm_kcontrol_widget() - Returns the widget associated to a
585 * kcontrol
586 * @kcontrol: The kcontrol
587 */
588struct snd_soc_dapm_widget *snd_soc_dapm_kcontrol_widget(
589 struct snd_kcontrol *kcontrol)
590{
591 return dapm_kcontrol_get_wlist(kcontrol)->widgets[0];
592}
593EXPORT_SYMBOL_GPL(snd_soc_dapm_kcontrol_widget);
594
595/**
596 * snd_soc_dapm_kcontrol_dapm() - Returns the dapm context associated to a
597 * kcontrol
598 * @kcontrol: The kcontrol
599 *
600 * Note: This function must only be used on kcontrols that are known to have
601 * been registered for a CODEC. Otherwise the behaviour is undefined.
602 */
603struct snd_soc_dapm_context *snd_soc_dapm_kcontrol_dapm(
604 struct snd_kcontrol *kcontrol)
605{
606 return dapm_kcontrol_get_wlist(kcontrol)->widgets[0]->dapm;
607}
608EXPORT_SYMBOL_GPL(snd_soc_dapm_kcontrol_dapm);
609
610static void dapm_reset(struct snd_soc_card *card)
611{
612 struct snd_soc_dapm_widget *w;
613
614 snd_soc_dapm_mutex_assert_held(card);
615
616 memset(&card->dapm_stats, 0, sizeof(card->dapm_stats));
617
618 for_each_card_widgets(card, w) {
619 w->new_power = w->power;
620 w->power_checked = false;
621 }
622}
623
624static const char *soc_dapm_prefix(struct snd_soc_dapm_context *dapm)
625{
626 if (!dapm->component)
627 return NULL;
628 return dapm->component->name_prefix;
629}
630
631static unsigned int soc_dapm_read(struct snd_soc_dapm_context *dapm, int reg)
632{
633 if (!dapm->component)
634 return -EIO;
635 return snd_soc_component_read(dapm->component, reg);
636}
637
638static int soc_dapm_update_bits(struct snd_soc_dapm_context *dapm,
639 int reg, unsigned int mask, unsigned int value)
640{
641 if (!dapm->component)
642 return -EIO;
643 return snd_soc_component_update_bits(dapm->component, reg,
644 mask, value);
645}
646
647static int soc_dapm_test_bits(struct snd_soc_dapm_context *dapm,
648 int reg, unsigned int mask, unsigned int value)
649{
650 if (!dapm->component)
651 return -EIO;
652 return snd_soc_component_test_bits(dapm->component, reg, mask, value);
653}
654
655static void soc_dapm_async_complete(struct snd_soc_dapm_context *dapm)
656{
657 if (dapm->component)
658 snd_soc_component_async_complete(dapm->component);
659}
660
661static struct snd_soc_dapm_widget *
662dapm_wcache_lookup(struct snd_soc_dapm_widget *w, const char *name)
663{
664 if (w) {
665 struct list_head *wlist = &w->dapm->card->widgets;
666 const int depth = 2;
667 int i = 0;
668
669 list_for_each_entry_from(w, wlist, list) {
670 if (!strcmp(name, w->name))
671 return w;
672
673 if (++i == depth)
674 break;
675 }
676 }
677
678 return NULL;
679}
680
681/**
682 * snd_soc_dapm_force_bias_level() - Sets the DAPM bias level
683 * @dapm: The DAPM context for which to set the level
684 * @level: The level to set
685 *
686 * Forces the DAPM bias level to a specific state. It will call the bias level
687 * callback of DAPM context with the specified level. This will even happen if
688 * the context is already at the same level. Furthermore it will not go through
689 * the normal bias level sequencing, meaning any intermediate states between the
690 * current and the target state will not be entered.
691 *
692 * Note that the change in bias level is only temporary and the next time
693 * snd_soc_dapm_sync() is called the state will be set to the level as
694 * determined by the DAPM core. The function is mainly intended to be used to
695 * used during probe or resume from suspend to power up the device so
696 * initialization can be done, before the DAPM core takes over.
697 */
698int snd_soc_dapm_force_bias_level(struct snd_soc_dapm_context *dapm,
699 enum snd_soc_bias_level level)
700{
701 int ret = 0;
702
703 if (dapm->component)
704 ret = snd_soc_component_set_bias_level(dapm->component, level);
705
706 if (ret == 0)
707 dapm->bias_level = level;
708
709 return ret;
710}
711EXPORT_SYMBOL_GPL(snd_soc_dapm_force_bias_level);
712
713/**
714 * snd_soc_dapm_set_bias_level - set the bias level for the system
715 * @dapm: DAPM context
716 * @level: level to configure
717 *
718 * Configure the bias (power) levels for the SoC audio device.
719 *
720 * Returns 0 for success else error.
721 */
722static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm,
723 enum snd_soc_bias_level level)
724{
725 struct snd_soc_card *card = dapm->card;
726 int ret = 0;
727
728 trace_snd_soc_bias_level_start(card, level);
729
730 ret = snd_soc_card_set_bias_level(card, dapm, level);
731 if (ret != 0)
732 goto out;
733
734 if (!card || dapm != &card->dapm)
735 ret = snd_soc_dapm_force_bias_level(dapm, level);
736
737 if (ret != 0)
738 goto out;
739
740 ret = snd_soc_card_set_bias_level_post(card, dapm, level);
741out:
742 trace_snd_soc_bias_level_done(card, level);
743
744 return ret;
745}
746
747/* connect mux widget to its interconnecting audio paths */
748static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
749 struct snd_soc_dapm_path *path, const char *control_name,
750 struct snd_soc_dapm_widget *w)
751{
752 const struct snd_kcontrol_new *kcontrol = &w->kcontrol_news[0];
753 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
754 unsigned int item;
755 int i;
756
757 if (e->reg != SND_SOC_NOPM) {
758 unsigned int val;
759 val = soc_dapm_read(dapm, e->reg);
760 val = (val >> e->shift_l) & e->mask;
761 item = snd_soc_enum_val_to_item(e, val);
762 } else {
763 /* since a virtual mux has no backing registers to
764 * decide which path to connect, it will try to match
765 * with the first enumeration. This is to ensure
766 * that the default mux choice (the first) will be
767 * correctly powered up during initialization.
768 */
769 item = 0;
770 }
771
772 i = match_string(e->texts, e->items, control_name);
773 if (i < 0)
774 return -ENODEV;
775
776 path->name = e->texts[i];
777 path->connect = (i == item);
778 return 0;
779
780}
781
782/* set up initial codec paths */
783static void dapm_set_mixer_path_status(struct snd_soc_dapm_path *p, int i,
784 int nth_path)
785{
786 struct soc_mixer_control *mc = (struct soc_mixer_control *)
787 p->sink->kcontrol_news[i].private_value;
788 unsigned int reg = mc->reg;
789 unsigned int invert = mc->invert;
790
791 if (reg != SND_SOC_NOPM) {
792 unsigned int shift = mc->shift;
793 unsigned int max = mc->max;
794 unsigned int mask = (1 << fls(max)) - 1;
795 unsigned int val = soc_dapm_read(p->sink->dapm, reg);
796
797 /*
798 * The nth_path argument allows this function to know
799 * which path of a kcontrol it is setting the initial
800 * status for. Ideally this would support any number
801 * of paths and channels. But since kcontrols only come
802 * in mono and stereo variants, we are limited to 2
803 * channels.
804 *
805 * The following code assumes for stereo controls the
806 * first path is the left channel, and all remaining
807 * paths are the right channel.
808 */
809 if (snd_soc_volsw_is_stereo(mc) && nth_path > 0) {
810 if (reg != mc->rreg)
811 val = soc_dapm_read(p->sink->dapm, mc->rreg);
812 val = (val >> mc->rshift) & mask;
813 } else {
814 val = (val >> shift) & mask;
815 }
816 if (invert)
817 val = max - val;
818 p->connect = !!val;
819 } else {
820 /* since a virtual mixer has no backing registers to
821 * decide which path to connect, it will try to match
822 * with initial state. This is to ensure
823 * that the default mixer choice will be
824 * correctly powered up during initialization.
825 */
826 p->connect = invert;
827 }
828}
829
830/* connect mixer widget to its interconnecting audio paths */
831static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
832 struct snd_soc_dapm_path *path, const char *control_name)
833{
834 int i, nth_path = 0;
835
836 /* search for mixer kcontrol */
837 for (i = 0; i < path->sink->num_kcontrols; i++) {
838 if (!strcmp(control_name, path->sink->kcontrol_news[i].name)) {
839 path->name = path->sink->kcontrol_news[i].name;
840 dapm_set_mixer_path_status(path, i, nth_path++);
841 return 0;
842 }
843 }
844 return -ENODEV;
845}
846
847static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm,
848 struct snd_soc_dapm_widget *kcontrolw,
849 const struct snd_kcontrol_new *kcontrol_new,
850 struct snd_kcontrol **kcontrol)
851{
852 struct snd_soc_dapm_widget *w;
853 int i;
854
855 *kcontrol = NULL;
856
857 for_each_card_widgets(dapm->card, w) {
858 if (w == kcontrolw || w->dapm != kcontrolw->dapm)
859 continue;
860 for (i = 0; i < w->num_kcontrols; i++) {
861 if (&w->kcontrol_news[i] == kcontrol_new) {
862 if (w->kcontrols)
863 *kcontrol = w->kcontrols[i];
864 return 1;
865 }
866 }
867 }
868
869 return 0;
870}
871
872/*
873 * Determine if a kcontrol is shared. If it is, look it up. If it isn't,
874 * create it. Either way, add the widget into the control's widget list
875 */
876static int dapm_create_or_share_kcontrol(struct snd_soc_dapm_widget *w,
877 int kci)
878{
879 struct snd_soc_dapm_context *dapm = w->dapm;
880 struct snd_card *card = dapm->card->snd_card;
881 const char *prefix;
882 size_t prefix_len;
883 int shared;
884 struct snd_kcontrol *kcontrol;
885 bool wname_in_long_name, kcname_in_long_name;
886 char *long_name = NULL;
887 const char *name;
888 int ret = 0;
889
890 prefix = soc_dapm_prefix(dapm);
891 if (prefix)
892 prefix_len = strlen(prefix) + 1;
893 else
894 prefix_len = 0;
895
896 shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[kci],
897 &kcontrol);
898
899 if (!kcontrol) {
900 if (shared) {
901 wname_in_long_name = false;
902 kcname_in_long_name = true;
903 } else {
904 switch (w->id) {
905 case snd_soc_dapm_switch:
906 case snd_soc_dapm_mixer:
907 case snd_soc_dapm_pga:
908 case snd_soc_dapm_effect:
909 case snd_soc_dapm_out_drv:
910 wname_in_long_name = true;
911 kcname_in_long_name = true;
912 break;
913 case snd_soc_dapm_mixer_named_ctl:
914 wname_in_long_name = false;
915 kcname_in_long_name = true;
916 break;
917 case snd_soc_dapm_demux:
918 case snd_soc_dapm_mux:
919 wname_in_long_name = true;
920 kcname_in_long_name = false;
921 break;
922 default:
923 return -EINVAL;
924 }
925 }
926 if (w->no_wname_in_kcontrol_name)
927 wname_in_long_name = false;
928
929 if (wname_in_long_name && kcname_in_long_name) {
930 /*
931 * The control will get a prefix from the control
932 * creation process but we're also using the same
933 * prefix for widgets so cut the prefix off the
934 * front of the widget name.
935 */
936 long_name = kasprintf(GFP_KERNEL, "%s %s",
937 w->name + prefix_len,
938 w->kcontrol_news[kci].name);
939 if (long_name == NULL)
940 return -ENOMEM;
941
942 name = long_name;
943 } else if (wname_in_long_name) {
944 long_name = NULL;
945 name = w->name + prefix_len;
946 } else {
947 long_name = NULL;
948 name = w->kcontrol_news[kci].name;
949 }
950
951 kcontrol = snd_soc_cnew(&w->kcontrol_news[kci], NULL, name,
952 prefix);
953 if (!kcontrol) {
954 ret = -ENOMEM;
955 goto exit_free;
956 }
957
958 kcontrol->private_free = dapm_kcontrol_free;
959
960 ret = dapm_kcontrol_data_alloc(w, kcontrol, name);
961 if (ret) {
962 snd_ctl_free_one(kcontrol);
963 goto exit_free;
964 }
965
966 ret = snd_ctl_add(card, kcontrol);
967 if (ret < 0) {
968 dev_err(dapm->dev,
969 "ASoC: failed to add widget %s dapm kcontrol %s: %d\n",
970 w->name, name, ret);
971 goto exit_free;
972 }
973 }
974
975 ret = dapm_kcontrol_add_widget(kcontrol, w);
976 if (ret == 0)
977 w->kcontrols[kci] = kcontrol;
978
979exit_free:
980 kfree(long_name);
981
982 return ret;
983}
984
985/* create new dapm mixer control */
986static int dapm_new_mixer(struct snd_soc_dapm_widget *w)
987{
988 int i, ret;
989 struct snd_soc_dapm_path *path;
990 struct dapm_kcontrol_data *data;
991
992 /* add kcontrol */
993 for (i = 0; i < w->num_kcontrols; i++) {
994 /* match name */
995 snd_soc_dapm_widget_for_each_source_path(w, path) {
996 /* mixer/mux paths name must match control name */
997 if (path->name != (char *)w->kcontrol_news[i].name)
998 continue;
999
1000 if (!w->kcontrols[i]) {
1001 ret = dapm_create_or_share_kcontrol(w, i);
1002 if (ret < 0)
1003 return ret;
1004 }
1005
1006 dapm_kcontrol_add_path(w->kcontrols[i], path);
1007
1008 data = snd_kcontrol_chip(w->kcontrols[i]);
1009 if (data->widget)
1010 snd_soc_dapm_add_path(data->widget->dapm,
1011 data->widget,
1012 path->source,
1013 NULL, NULL);
1014 }
1015 }
1016
1017 return 0;
1018}
1019
1020/* create new dapm mux control */
1021static int dapm_new_mux(struct snd_soc_dapm_widget *w)
1022{
1023 struct snd_soc_dapm_context *dapm = w->dapm;
1024 enum snd_soc_dapm_direction dir;
1025 struct snd_soc_dapm_path *path;
1026 const char *type;
1027 int ret;
1028
1029 switch (w->id) {
1030 case snd_soc_dapm_mux:
1031 dir = SND_SOC_DAPM_DIR_OUT;
1032 type = "mux";
1033 break;
1034 case snd_soc_dapm_demux:
1035 dir = SND_SOC_DAPM_DIR_IN;
1036 type = "demux";
1037 break;
1038 default:
1039 return -EINVAL;
1040 }
1041
1042 if (w->num_kcontrols != 1) {
1043 dev_err(dapm->dev,
1044 "ASoC: %s %s has incorrect number of controls\n", type,
1045 w->name);
1046 return -EINVAL;
1047 }
1048
1049 if (list_empty(&w->edges[dir])) {
1050 dev_err(dapm->dev, "ASoC: %s %s has no paths\n", type, w->name);
1051 return -EINVAL;
1052 }
1053
1054 ret = dapm_create_or_share_kcontrol(w, 0);
1055 if (ret < 0)
1056 return ret;
1057
1058 snd_soc_dapm_widget_for_each_path(w, dir, path) {
1059 if (path->name)
1060 dapm_kcontrol_add_path(w->kcontrols[0], path);
1061 }
1062
1063 return 0;
1064}
1065
1066/* create new dapm volume control */
1067static int dapm_new_pga(struct snd_soc_dapm_widget *w)
1068{
1069 int i;
1070
1071 for (i = 0; i < w->num_kcontrols; i++) {
1072 int ret = dapm_create_or_share_kcontrol(w, i);
1073 if (ret < 0)
1074 return ret;
1075 }
1076
1077 return 0;
1078}
1079
1080/* create new dapm dai link control */
1081static int dapm_new_dai_link(struct snd_soc_dapm_widget *w)
1082{
1083 int i;
1084 struct snd_soc_pcm_runtime *rtd = w->priv;
1085
1086 /* create control for links with > 1 config */
1087 if (rtd->dai_link->num_c2c_params <= 1)
1088 return 0;
1089
1090 /* add kcontrol */
1091 for (i = 0; i < w->num_kcontrols; i++) {
1092 struct snd_soc_dapm_context *dapm = w->dapm;
1093 struct snd_card *card = dapm->card->snd_card;
1094 struct snd_kcontrol *kcontrol = snd_soc_cnew(&w->kcontrol_news[i],
1095 w, w->name, NULL);
1096 int ret = snd_ctl_add(card, kcontrol);
1097
1098 if (ret < 0) {
1099 dev_err(dapm->dev,
1100 "ASoC: failed to add widget %s dapm kcontrol %s: %d\n",
1101 w->name, w->kcontrol_news[i].name, ret);
1102 return ret;
1103 }
1104 kcontrol->private_data = w;
1105 w->kcontrols[i] = kcontrol;
1106 }
1107
1108 return 0;
1109}
1110
1111/* We implement power down on suspend by checking the power state of
1112 * the ALSA card - when we are suspending the ALSA state for the card
1113 * is set to D3.
1114 */
1115static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
1116{
1117 int level = snd_power_get_state(widget->dapm->card->snd_card);
1118
1119 switch (level) {
1120 case SNDRV_CTL_POWER_D3hot:
1121 case SNDRV_CTL_POWER_D3cold:
1122 if (widget->ignore_suspend)
1123 dev_dbg(widget->dapm->dev, "ASoC: %s ignoring suspend\n",
1124 widget->name);
1125 return widget->ignore_suspend;
1126 default:
1127 return 1;
1128 }
1129}
1130
1131static void dapm_widget_list_free(struct snd_soc_dapm_widget_list **list)
1132{
1133 kfree(*list);
1134}
1135
1136static int dapm_widget_list_create(struct snd_soc_dapm_widget_list **list,
1137 struct list_head *widgets)
1138{
1139 struct snd_soc_dapm_widget *w;
1140 struct list_head *it;
1141 unsigned int size = 0;
1142 unsigned int i = 0;
1143
1144 list_for_each(it, widgets)
1145 size++;
1146
1147 *list = kzalloc(struct_size(*list, widgets, size), GFP_KERNEL);
1148 if (*list == NULL)
1149 return -ENOMEM;
1150
1151 list_for_each_entry(w, widgets, work_list)
1152 (*list)->widgets[i++] = w;
1153
1154 (*list)->num_widgets = i;
1155
1156 return 0;
1157}
1158
1159/*
1160 * Recursively reset the cached number of inputs or outputs for the specified
1161 * widget and all widgets that can be reached via incoming or outcoming paths
1162 * from the widget.
1163 */
1164static void invalidate_paths_ep(struct snd_soc_dapm_widget *widget,
1165 enum snd_soc_dapm_direction dir)
1166{
1167 enum snd_soc_dapm_direction rdir = SND_SOC_DAPM_DIR_REVERSE(dir);
1168 struct snd_soc_dapm_path *path;
1169
1170 widget->endpoints[dir] = -1;
1171
1172 snd_soc_dapm_widget_for_each_path(widget, rdir, path) {
1173 if (path->weak || path->is_supply)
1174 continue;
1175
1176 if (path->walking)
1177 return;
1178
1179 if (path->connect) {
1180 path->walking = 1;
1181 invalidate_paths_ep(path->node[dir], dir);
1182 path->walking = 0;
1183 }
1184 }
1185}
1186
1187/*
1188 * Common implementation for is_connected_output_ep() and
1189 * is_connected_input_ep(). The function is inlined since the combined size of
1190 * the two specialized functions is only marginally larger then the size of the
1191 * generic function and at the same time the fast path of the specialized
1192 * functions is significantly smaller than the generic function.
1193 */
1194static __always_inline int is_connected_ep(struct snd_soc_dapm_widget *widget,
1195 struct list_head *list, enum snd_soc_dapm_direction dir,
1196 int (*fn)(struct snd_soc_dapm_widget *, struct list_head *,
1197 bool (*custom_stop_condition)(struct snd_soc_dapm_widget *,
1198 enum snd_soc_dapm_direction)),
1199 bool (*custom_stop_condition)(struct snd_soc_dapm_widget *,
1200 enum snd_soc_dapm_direction))
1201{
1202 enum snd_soc_dapm_direction rdir = SND_SOC_DAPM_DIR_REVERSE(dir);
1203 struct snd_soc_dapm_path *path;
1204 int con = 0;
1205
1206 if (widget->endpoints[dir] >= 0)
1207 return widget->endpoints[dir];
1208
1209 DAPM_UPDATE_STAT(widget, path_checks);
1210
1211 /* do we need to add this widget to the list ? */
1212 if (list)
1213 list_add_tail(&widget->work_list, list);
1214
1215 if (custom_stop_condition && custom_stop_condition(widget, dir)) {
1216 list = NULL;
1217 custom_stop_condition = NULL;
1218 }
1219
1220 if ((widget->is_ep & SND_SOC_DAPM_DIR_TO_EP(dir)) && widget->connected) {
1221 widget->endpoints[dir] = snd_soc_dapm_suspend_check(widget);
1222 return widget->endpoints[dir];
1223 }
1224
1225 snd_soc_dapm_widget_for_each_path(widget, rdir, path) {
1226 DAPM_UPDATE_STAT(widget, neighbour_checks);
1227
1228 if (path->weak || path->is_supply)
1229 continue;
1230
1231 if (path->walking)
1232 return 1;
1233
1234 trace_snd_soc_dapm_path(widget, dir, path);
1235
1236 if (path->connect) {
1237 path->walking = 1;
1238 con += fn(path->node[dir], list, custom_stop_condition);
1239 path->walking = 0;
1240 }
1241 }
1242
1243 widget->endpoints[dir] = con;
1244
1245 return con;
1246}
1247
1248/*
1249 * Recursively check for a completed path to an active or physically connected
1250 * output widget. Returns number of complete paths.
1251 *
1252 * Optionally, can be supplied with a function acting as a stopping condition.
1253 * This function takes the dapm widget currently being examined and the walk
1254 * direction as an arguments, it should return true if widgets from that point
1255 * in the graph onwards should not be added to the widget list.
1256 */
1257static int is_connected_output_ep(struct snd_soc_dapm_widget *widget,
1258 struct list_head *list,
1259 bool (*custom_stop_condition)(struct snd_soc_dapm_widget *i,
1260 enum snd_soc_dapm_direction))
1261{
1262 return is_connected_ep(widget, list, SND_SOC_DAPM_DIR_OUT,
1263 is_connected_output_ep, custom_stop_condition);
1264}
1265
1266/*
1267 * Recursively check for a completed path to an active or physically connected
1268 * input widget. Returns number of complete paths.
1269 *
1270 * Optionally, can be supplied with a function acting as a stopping condition.
1271 * This function takes the dapm widget currently being examined and the walk
1272 * direction as an arguments, it should return true if the walk should be
1273 * stopped and false otherwise.
1274 */
1275static int is_connected_input_ep(struct snd_soc_dapm_widget *widget,
1276 struct list_head *list,
1277 bool (*custom_stop_condition)(struct snd_soc_dapm_widget *i,
1278 enum snd_soc_dapm_direction))
1279{
1280 return is_connected_ep(widget, list, SND_SOC_DAPM_DIR_IN,
1281 is_connected_input_ep, custom_stop_condition);
1282}
1283
1284/**
1285 * snd_soc_dapm_dai_get_connected_widgets - query audio path and it's widgets.
1286 * @dai: the soc DAI.
1287 * @stream: stream direction.
1288 * @list: list of active widgets for this stream.
1289 * @custom_stop_condition: (optional) a function meant to stop the widget graph
1290 * walk based on custom logic.
1291 *
1292 * Queries DAPM graph as to whether a valid audio stream path exists for
1293 * the initial stream specified by name. This takes into account
1294 * current mixer and mux kcontrol settings. Creates list of valid widgets.
1295 *
1296 * Optionally, can be supplied with a function acting as a stopping condition.
1297 * This function takes the dapm widget currently being examined and the walk
1298 * direction as an arguments, it should return true if the walk should be
1299 * stopped and false otherwise.
1300 *
1301 * Returns the number of valid paths or negative error.
1302 */
1303int snd_soc_dapm_dai_get_connected_widgets(struct snd_soc_dai *dai, int stream,
1304 struct snd_soc_dapm_widget_list **list,
1305 bool (*custom_stop_condition)(struct snd_soc_dapm_widget *,
1306 enum snd_soc_dapm_direction))
1307{
1308 struct snd_soc_card *card = dai->component->card;
1309 struct snd_soc_dapm_widget *w = snd_soc_dai_get_widget(dai, stream);
1310 LIST_HEAD(widgets);
1311 int paths;
1312 int ret;
1313
1314 snd_soc_dapm_mutex_lock(card);
1315
1316 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1317 invalidate_paths_ep(w, SND_SOC_DAPM_DIR_OUT);
1318 paths = is_connected_output_ep(w, &widgets,
1319 custom_stop_condition);
1320 } else {
1321 invalidate_paths_ep(w, SND_SOC_DAPM_DIR_IN);
1322 paths = is_connected_input_ep(w, &widgets,
1323 custom_stop_condition);
1324 }
1325
1326 /* Drop starting point */
1327 list_del(widgets.next);
1328
1329 ret = dapm_widget_list_create(list, &widgets);
1330 if (ret)
1331 paths = ret;
1332
1333 trace_snd_soc_dapm_connected(paths, stream);
1334 snd_soc_dapm_mutex_unlock(card);
1335
1336 return paths;
1337}
1338EXPORT_SYMBOL_GPL(snd_soc_dapm_dai_get_connected_widgets);
1339
1340void snd_soc_dapm_dai_free_widgets(struct snd_soc_dapm_widget_list **list)
1341{
1342 dapm_widget_list_free(list);
1343}
1344EXPORT_SYMBOL_GPL(snd_soc_dapm_dai_free_widgets);
1345
1346/*
1347 * Handler for regulator supply widget.
1348 */
1349int dapm_regulator_event(struct snd_soc_dapm_widget *w,
1350 struct snd_kcontrol *kcontrol, int event)
1351{
1352 int ret;
1353
1354 soc_dapm_async_complete(w->dapm);
1355
1356 if (SND_SOC_DAPM_EVENT_ON(event)) {
1357 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
1358 ret = regulator_allow_bypass(w->regulator, false);
1359 if (ret != 0)
1360 dev_warn(w->dapm->dev,
1361 "ASoC: Failed to unbypass %s: %d\n",
1362 w->name, ret);
1363 }
1364
1365 return regulator_enable(w->regulator);
1366 } else {
1367 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
1368 ret = regulator_allow_bypass(w->regulator, true);
1369 if (ret != 0)
1370 dev_warn(w->dapm->dev,
1371 "ASoC: Failed to bypass %s: %d\n",
1372 w->name, ret);
1373 }
1374
1375 return regulator_disable_deferred(w->regulator, w->shift);
1376 }
1377}
1378EXPORT_SYMBOL_GPL(dapm_regulator_event);
1379
1380/*
1381 * Handler for pinctrl widget.
1382 */
1383int dapm_pinctrl_event(struct snd_soc_dapm_widget *w,
1384 struct snd_kcontrol *kcontrol, int event)
1385{
1386 struct snd_soc_dapm_pinctrl_priv *priv = w->priv;
1387 struct pinctrl *p = w->pinctrl;
1388 struct pinctrl_state *s;
1389
1390 if (!p || !priv)
1391 return -EIO;
1392
1393 if (SND_SOC_DAPM_EVENT_ON(event))
1394 s = pinctrl_lookup_state(p, priv->active_state);
1395 else
1396 s = pinctrl_lookup_state(p, priv->sleep_state);
1397
1398 if (IS_ERR(s))
1399 return PTR_ERR(s);
1400
1401 return pinctrl_select_state(p, s);
1402}
1403EXPORT_SYMBOL_GPL(dapm_pinctrl_event);
1404
1405/*
1406 * Handler for clock supply widget.
1407 */
1408int dapm_clock_event(struct snd_soc_dapm_widget *w,
1409 struct snd_kcontrol *kcontrol, int event)
1410{
1411 if (!w->clk)
1412 return -EIO;
1413
1414 soc_dapm_async_complete(w->dapm);
1415
1416 if (SND_SOC_DAPM_EVENT_ON(event)) {
1417 return clk_prepare_enable(w->clk);
1418 } else {
1419 clk_disable_unprepare(w->clk);
1420 return 0;
1421 }
1422
1423 return 0;
1424}
1425EXPORT_SYMBOL_GPL(dapm_clock_event);
1426
1427static int dapm_widget_power_check(struct snd_soc_dapm_widget *w)
1428{
1429 if (w->power_checked)
1430 return w->new_power;
1431
1432 if (w->force)
1433 w->new_power = 1;
1434 else
1435 w->new_power = w->power_check(w);
1436
1437 w->power_checked = true;
1438
1439 return w->new_power;
1440}
1441
1442/* Generic check to see if a widget should be powered. */
1443static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
1444{
1445 int in, out;
1446
1447 DAPM_UPDATE_STAT(w, power_checks);
1448
1449 in = is_connected_input_ep(w, NULL, NULL);
1450 out = is_connected_output_ep(w, NULL, NULL);
1451 return out != 0 && in != 0;
1452}
1453
1454/* Check to see if a power supply is needed */
1455static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
1456{
1457 struct snd_soc_dapm_path *path;
1458
1459 DAPM_UPDATE_STAT(w, power_checks);
1460
1461 /* Check if one of our outputs is connected */
1462 snd_soc_dapm_widget_for_each_sink_path(w, path) {
1463 DAPM_UPDATE_STAT(w, neighbour_checks);
1464
1465 if (path->weak)
1466 continue;
1467
1468 if (path->connected &&
1469 !path->connected(path->source, path->sink))
1470 continue;
1471
1472 if (dapm_widget_power_check(path->sink))
1473 return 1;
1474 }
1475
1476 return 0;
1477}
1478
1479static int dapm_always_on_check_power(struct snd_soc_dapm_widget *w)
1480{
1481 return w->connected;
1482}
1483
1484static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
1485 struct snd_soc_dapm_widget *b,
1486 bool power_up)
1487{
1488 int *sort;
1489
1490 BUILD_BUG_ON(ARRAY_SIZE(dapm_up_seq) != SND_SOC_DAPM_TYPE_COUNT);
1491 BUILD_BUG_ON(ARRAY_SIZE(dapm_down_seq) != SND_SOC_DAPM_TYPE_COUNT);
1492
1493 if (power_up)
1494 sort = dapm_up_seq;
1495 else
1496 sort = dapm_down_seq;
1497
1498 WARN_ONCE(sort[a->id] == 0, "offset a->id %d not initialized\n", a->id);
1499 WARN_ONCE(sort[b->id] == 0, "offset b->id %d not initialized\n", b->id);
1500
1501 if (sort[a->id] != sort[b->id])
1502 return sort[a->id] - sort[b->id];
1503 if (a->subseq != b->subseq) {
1504 if (power_up)
1505 return a->subseq - b->subseq;
1506 else
1507 return b->subseq - a->subseq;
1508 }
1509 if (a->reg != b->reg)
1510 return a->reg - b->reg;
1511 if (a->dapm != b->dapm)
1512 return (unsigned long)a->dapm - (unsigned long)b->dapm;
1513
1514 return 0;
1515}
1516
1517/* Insert a widget in order into a DAPM power sequence. */
1518static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
1519 struct list_head *list,
1520 bool power_up)
1521{
1522 struct snd_soc_dapm_widget *w;
1523
1524 list_for_each_entry(w, list, power_list)
1525 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
1526 list_add_tail(&new_widget->power_list, &w->power_list);
1527 return;
1528 }
1529
1530 list_add_tail(&new_widget->power_list, list);
1531}
1532
1533static void dapm_seq_check_event(struct snd_soc_card *card,
1534 struct snd_soc_dapm_widget *w, int event)
1535{
1536 const char *ev_name;
1537 int power;
1538
1539 switch (event) {
1540 case SND_SOC_DAPM_PRE_PMU:
1541 ev_name = "PRE_PMU";
1542 power = 1;
1543 break;
1544 case SND_SOC_DAPM_POST_PMU:
1545 ev_name = "POST_PMU";
1546 power = 1;
1547 break;
1548 case SND_SOC_DAPM_PRE_PMD:
1549 ev_name = "PRE_PMD";
1550 power = 0;
1551 break;
1552 case SND_SOC_DAPM_POST_PMD:
1553 ev_name = "POST_PMD";
1554 power = 0;
1555 break;
1556 case SND_SOC_DAPM_WILL_PMU:
1557 ev_name = "WILL_PMU";
1558 power = 1;
1559 break;
1560 case SND_SOC_DAPM_WILL_PMD:
1561 ev_name = "WILL_PMD";
1562 power = 0;
1563 break;
1564 default:
1565 WARN(1, "Unknown event %d\n", event);
1566 return;
1567 }
1568
1569 if (w->new_power != power)
1570 return;
1571
1572 if (w->event && (w->event_flags & event)) {
1573 int ret;
1574
1575 pop_dbg(w->dapm->dev, card->pop_time, "pop test : %s %s\n",
1576 w->name, ev_name);
1577 soc_dapm_async_complete(w->dapm);
1578 trace_snd_soc_dapm_widget_event_start(w, event);
1579 ret = w->event(w, NULL, event);
1580 trace_snd_soc_dapm_widget_event_done(w, event);
1581 if (ret < 0)
1582 dev_err(w->dapm->dev, "ASoC: %s: %s event failed: %d\n",
1583 ev_name, w->name, ret);
1584 }
1585}
1586
1587/* Apply the coalesced changes from a DAPM sequence */
1588static void dapm_seq_run_coalesced(struct snd_soc_card *card,
1589 struct list_head *pending)
1590{
1591 struct snd_soc_dapm_context *dapm;
1592 struct snd_soc_dapm_widget *w;
1593 int reg;
1594 unsigned int value = 0;
1595 unsigned int mask = 0;
1596
1597 w = list_first_entry(pending, struct snd_soc_dapm_widget, power_list);
1598 reg = w->reg;
1599 dapm = w->dapm;
1600
1601 list_for_each_entry(w, pending, power_list) {
1602 WARN_ON(reg != w->reg || dapm != w->dapm);
1603 w->power = w->new_power;
1604
1605 mask |= w->mask << w->shift;
1606 if (w->power)
1607 value |= w->on_val << w->shift;
1608 else
1609 value |= w->off_val << w->shift;
1610
1611 pop_dbg(dapm->dev, card->pop_time,
1612 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
1613 w->name, reg, value, mask);
1614
1615 /* Check for events */
1616 dapm_seq_check_event(card, w, SND_SOC_DAPM_PRE_PMU);
1617 dapm_seq_check_event(card, w, SND_SOC_DAPM_PRE_PMD);
1618 }
1619
1620 if (reg >= 0) {
1621 /* Any widget will do, they should all be updating the
1622 * same register.
1623 */
1624
1625 pop_dbg(dapm->dev, card->pop_time,
1626 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
1627 value, mask, reg, card->pop_time);
1628 pop_wait(card->pop_time);
1629 soc_dapm_update_bits(dapm, reg, mask, value);
1630 }
1631
1632 list_for_each_entry(w, pending, power_list) {
1633 dapm_seq_check_event(card, w, SND_SOC_DAPM_POST_PMU);
1634 dapm_seq_check_event(card, w, SND_SOC_DAPM_POST_PMD);
1635 }
1636}
1637
1638/* Apply a DAPM power sequence.
1639 *
1640 * We walk over a pre-sorted list of widgets to apply power to. In
1641 * order to minimise the number of writes to the device required
1642 * multiple widgets will be updated in a single write where possible.
1643 * Currently anything that requires more than a single write is not
1644 * handled.
1645 */
1646static void dapm_seq_run(struct snd_soc_card *card,
1647 struct list_head *list, int event, bool power_up)
1648{
1649 struct snd_soc_dapm_widget *w, *n;
1650 struct snd_soc_dapm_context *d;
1651 LIST_HEAD(pending);
1652 int cur_sort = -1;
1653 int cur_subseq = -1;
1654 int cur_reg = SND_SOC_NOPM;
1655 struct snd_soc_dapm_context *cur_dapm = NULL;
1656 int i;
1657 int *sort;
1658
1659 if (power_up)
1660 sort = dapm_up_seq;
1661 else
1662 sort = dapm_down_seq;
1663
1664 list_for_each_entry_safe(w, n, list, power_list) {
1665 int ret = 0;
1666
1667 /* Do we need to apply any queued changes? */
1668 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
1669 w->dapm != cur_dapm || w->subseq != cur_subseq) {
1670 if (!list_empty(&pending))
1671 dapm_seq_run_coalesced(card, &pending);
1672
1673 if (cur_dapm && cur_dapm->component) {
1674 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1675 if (sort[i] == cur_sort)
1676 snd_soc_component_seq_notifier(
1677 cur_dapm->component,
1678 i, cur_subseq);
1679 }
1680
1681 if (cur_dapm && w->dapm != cur_dapm)
1682 soc_dapm_async_complete(cur_dapm);
1683
1684 INIT_LIST_HEAD(&pending);
1685 cur_sort = -1;
1686 cur_subseq = INT_MIN;
1687 cur_reg = SND_SOC_NOPM;
1688 cur_dapm = NULL;
1689 }
1690
1691 switch (w->id) {
1692 case snd_soc_dapm_pre:
1693 if (!w->event)
1694 continue;
1695
1696 if (event == SND_SOC_DAPM_STREAM_START)
1697 ret = w->event(w,
1698 NULL, SND_SOC_DAPM_PRE_PMU);
1699 else if (event == SND_SOC_DAPM_STREAM_STOP)
1700 ret = w->event(w,
1701 NULL, SND_SOC_DAPM_PRE_PMD);
1702 break;
1703
1704 case snd_soc_dapm_post:
1705 if (!w->event)
1706 continue;
1707
1708 if (event == SND_SOC_DAPM_STREAM_START)
1709 ret = w->event(w,
1710 NULL, SND_SOC_DAPM_POST_PMU);
1711 else if (event == SND_SOC_DAPM_STREAM_STOP)
1712 ret = w->event(w,
1713 NULL, SND_SOC_DAPM_POST_PMD);
1714 break;
1715
1716 default:
1717 /* Queue it up for application */
1718 cur_sort = sort[w->id];
1719 cur_subseq = w->subseq;
1720 cur_reg = w->reg;
1721 cur_dapm = w->dapm;
1722 list_move(&w->power_list, &pending);
1723 break;
1724 }
1725
1726 if (ret < 0)
1727 dev_err(w->dapm->dev,
1728 "ASoC: Failed to apply widget power: %d\n", ret);
1729 }
1730
1731 if (!list_empty(&pending))
1732 dapm_seq_run_coalesced(card, &pending);
1733
1734 if (cur_dapm && cur_dapm->component) {
1735 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1736 if (sort[i] == cur_sort)
1737 snd_soc_component_seq_notifier(
1738 cur_dapm->component,
1739 i, cur_subseq);
1740 }
1741
1742 for_each_card_dapms(card, d)
1743 soc_dapm_async_complete(d);
1744}
1745
1746static void dapm_widget_update(struct snd_soc_card *card)
1747{
1748 struct snd_soc_dapm_update *update = card->update;
1749 struct snd_soc_dapm_widget_list *wlist;
1750 struct snd_soc_dapm_widget *w = NULL;
1751 unsigned int wi;
1752 int ret;
1753
1754 if (!update || !dapm_kcontrol_is_powered(update->kcontrol))
1755 return;
1756
1757 wlist = dapm_kcontrol_get_wlist(update->kcontrol);
1758
1759 for_each_dapm_widgets(wlist, wi, w) {
1760 if (w->event && (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
1761 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
1762 if (ret != 0)
1763 dev_err(w->dapm->dev, "ASoC: %s DAPM pre-event failed: %d\n",
1764 w->name, ret);
1765 }
1766 }
1767
1768 if (!w)
1769 return;
1770
1771 ret = soc_dapm_update_bits(w->dapm, update->reg, update->mask,
1772 update->val);
1773 if (ret < 0)
1774 dev_err(w->dapm->dev, "ASoC: %s DAPM update failed: %d\n",
1775 w->name, ret);
1776
1777 if (update->has_second_set) {
1778 ret = soc_dapm_update_bits(w->dapm, update->reg2,
1779 update->mask2, update->val2);
1780 if (ret < 0)
1781 dev_err(w->dapm->dev,
1782 "ASoC: %s DAPM update failed: %d\n",
1783 w->name, ret);
1784 }
1785
1786 for_each_dapm_widgets(wlist, wi, w) {
1787 if (w->event && (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1788 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1789 if (ret != 0)
1790 dev_err(w->dapm->dev, "ASoC: %s DAPM post-event failed: %d\n",
1791 w->name, ret);
1792 }
1793 }
1794}
1795
1796/* Async callback run prior to DAPM sequences - brings to _PREPARE if
1797 * they're changing state.
1798 */
1799static void dapm_pre_sequence_async(void *data, async_cookie_t cookie)
1800{
1801 struct snd_soc_dapm_context *d = data;
1802 int ret;
1803
1804 /* If we're off and we're not supposed to go into STANDBY */
1805 if (d->bias_level == SND_SOC_BIAS_OFF &&
1806 d->target_bias_level != SND_SOC_BIAS_OFF) {
1807 if (d->dev && cookie)
1808 pm_runtime_get_sync(d->dev);
1809
1810 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1811 if (ret != 0)
1812 dev_err(d->dev,
1813 "ASoC: Failed to turn on bias: %d\n", ret);
1814 }
1815
1816 /* Prepare for a transition to ON or away from ON */
1817 if ((d->target_bias_level == SND_SOC_BIAS_ON &&
1818 d->bias_level != SND_SOC_BIAS_ON) ||
1819 (d->target_bias_level != SND_SOC_BIAS_ON &&
1820 d->bias_level == SND_SOC_BIAS_ON)) {
1821 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);
1822 if (ret != 0)
1823 dev_err(d->dev,
1824 "ASoC: Failed to prepare bias: %d\n", ret);
1825 }
1826}
1827
1828/* Async callback run prior to DAPM sequences - brings to their final
1829 * state.
1830 */
1831static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
1832{
1833 struct snd_soc_dapm_context *d = data;
1834 int ret;
1835
1836 /* If we just powered the last thing off drop to standby bias */
1837 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1838 (d->target_bias_level == SND_SOC_BIAS_STANDBY ||
1839 d->target_bias_level == SND_SOC_BIAS_OFF)) {
1840 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1841 if (ret != 0)
1842 dev_err(d->dev, "ASoC: Failed to apply standby bias: %d\n",
1843 ret);
1844 }
1845
1846 /* If we're in standby and can support bias off then do that */
1847 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1848 d->target_bias_level == SND_SOC_BIAS_OFF) {
1849 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);
1850 if (ret != 0)
1851 dev_err(d->dev, "ASoC: Failed to turn off bias: %d\n",
1852 ret);
1853
1854 if (d->dev && cookie)
1855 pm_runtime_put(d->dev);
1856 }
1857
1858 /* If we just powered up then move to active bias */
1859 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1860 d->target_bias_level == SND_SOC_BIAS_ON) {
1861 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);
1862 if (ret != 0)
1863 dev_err(d->dev, "ASoC: Failed to apply active bias: %d\n",
1864 ret);
1865 }
1866}
1867
1868static void dapm_widget_set_peer_power(struct snd_soc_dapm_widget *peer,
1869 bool power, bool connect)
1870{
1871 /* If a connection is being made or broken then that update
1872 * will have marked the peer dirty, otherwise the widgets are
1873 * not connected and this update has no impact. */
1874 if (!connect)
1875 return;
1876
1877 /* If the peer is already in the state we're moving to then we
1878 * won't have an impact on it. */
1879 if (power != peer->power)
1880 dapm_mark_dirty(peer, "peer state change");
1881}
1882
1883static void dapm_power_one_widget(struct snd_soc_dapm_widget *w,
1884 struct list_head *up_list,
1885 struct list_head *down_list)
1886{
1887 struct snd_soc_dapm_path *path;
1888 int power;
1889
1890 switch (w->id) {
1891 case snd_soc_dapm_pre:
1892 power = 0;
1893 goto end;
1894 case snd_soc_dapm_post:
1895 power = 1;
1896 goto end;
1897 default:
1898 break;
1899 }
1900
1901 power = dapm_widget_power_check(w);
1902
1903 if (w->power == power)
1904 return;
1905
1906 trace_snd_soc_dapm_widget_power(w, power);
1907
1908 /*
1909 * If we changed our power state perhaps our neigbours
1910 * changed also.
1911 */
1912 snd_soc_dapm_widget_for_each_source_path(w, path)
1913 dapm_widget_set_peer_power(path->source, power, path->connect);
1914
1915 /*
1916 * Supplies can't affect their outputs, only their inputs
1917 */
1918 if (!w->is_supply)
1919 snd_soc_dapm_widget_for_each_sink_path(w, path)
1920 dapm_widget_set_peer_power(path->sink, power, path->connect);
1921
1922end:
1923 if (power)
1924 dapm_seq_insert(w, up_list, true);
1925 else
1926 dapm_seq_insert(w, down_list, false);
1927}
1928
1929static bool dapm_idle_bias_off(struct snd_soc_dapm_context *dapm)
1930{
1931 if (dapm->idle_bias_off)
1932 return true;
1933
1934 switch (snd_power_get_state(dapm->card->snd_card)) {
1935 case SNDRV_CTL_POWER_D3hot:
1936 case SNDRV_CTL_POWER_D3cold:
1937 return dapm->suspend_bias_off;
1938 default:
1939 break;
1940 }
1941
1942 return false;
1943}
1944
1945/*
1946 * Scan each dapm widget for complete audio path.
1947 * A complete path is a route that has valid endpoints i.e.:-
1948 *
1949 * o DAC to output pin.
1950 * o Input pin to ADC.
1951 * o Input pin to Output pin (bypass, sidetone)
1952 * o DAC to ADC (loopback).
1953 */
1954static int dapm_power_widgets(struct snd_soc_card *card, int event)
1955{
1956 struct snd_soc_dapm_widget *w;
1957 struct snd_soc_dapm_context *d;
1958 LIST_HEAD(up_list);
1959 LIST_HEAD(down_list);
1960 ASYNC_DOMAIN_EXCLUSIVE(async_domain);
1961 enum snd_soc_bias_level bias;
1962 int ret;
1963
1964 snd_soc_dapm_mutex_assert_held(card);
1965
1966 trace_snd_soc_dapm_start(card);
1967
1968 for_each_card_dapms(card, d) {
1969 if (dapm_idle_bias_off(d))
1970 d->target_bias_level = SND_SOC_BIAS_OFF;
1971 else
1972 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1973 }
1974
1975 dapm_reset(card);
1976
1977 /* Check which widgets we need to power and store them in
1978 * lists indicating if they should be powered up or down. We
1979 * only check widgets that have been flagged as dirty but note
1980 * that new widgets may be added to the dirty list while we
1981 * iterate.
1982 */
1983 list_for_each_entry(w, &card->dapm_dirty, dirty) {
1984 dapm_power_one_widget(w, &up_list, &down_list);
1985 }
1986
1987 for_each_card_widgets(card, w) {
1988 switch (w->id) {
1989 case snd_soc_dapm_pre:
1990 case snd_soc_dapm_post:
1991 /* These widgets always need to be powered */
1992 break;
1993 default:
1994 list_del_init(&w->dirty);
1995 break;
1996 }
1997
1998 if (w->new_power) {
1999 d = w->dapm;
2000
2001 /* Supplies and micbiases only bring the
2002 * context up to STANDBY as unless something
2003 * else is active and passing audio they
2004 * generally don't require full power. Signal
2005 * generators are virtual pins and have no
2006 * power impact themselves.
2007 */
2008 switch (w->id) {
2009 case snd_soc_dapm_siggen:
2010 case snd_soc_dapm_vmid:
2011 break;
2012 case snd_soc_dapm_supply:
2013 case snd_soc_dapm_regulator_supply:
2014 case snd_soc_dapm_pinctrl:
2015 case snd_soc_dapm_clock_supply:
2016 case snd_soc_dapm_micbias:
2017 if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
2018 d->target_bias_level = SND_SOC_BIAS_STANDBY;
2019 break;
2020 default:
2021 d->target_bias_level = SND_SOC_BIAS_ON;
2022 break;
2023 }
2024 }
2025
2026 }
2027
2028 /* Force all contexts in the card to the same bias state if
2029 * they're not ground referenced.
2030 */
2031 bias = SND_SOC_BIAS_OFF;
2032 for_each_card_dapms(card, d)
2033 if (d->target_bias_level > bias)
2034 bias = d->target_bias_level;
2035 for_each_card_dapms(card, d)
2036 if (!dapm_idle_bias_off(d))
2037 d->target_bias_level = bias;
2038
2039 trace_snd_soc_dapm_walk_done(card);
2040
2041 /* Run card bias changes at first */
2042 dapm_pre_sequence_async(&card->dapm, 0);
2043 /* Run other bias changes in parallel */
2044 for_each_card_dapms(card, d) {
2045 if (d != &card->dapm && d->bias_level != d->target_bias_level)
2046 async_schedule_domain(dapm_pre_sequence_async, d,
2047 &async_domain);
2048 }
2049 async_synchronize_full_domain(&async_domain);
2050
2051 list_for_each_entry(w, &down_list, power_list) {
2052 dapm_seq_check_event(card, w, SND_SOC_DAPM_WILL_PMD);
2053 }
2054
2055 list_for_each_entry(w, &up_list, power_list) {
2056 dapm_seq_check_event(card, w, SND_SOC_DAPM_WILL_PMU);
2057 }
2058
2059 /* Power down widgets first; try to avoid amplifying pops. */
2060 dapm_seq_run(card, &down_list, event, false);
2061
2062 dapm_widget_update(card);
2063
2064 /* Now power up. */
2065 dapm_seq_run(card, &up_list, event, true);
2066
2067 /* Run all the bias changes in parallel */
2068 for_each_card_dapms(card, d) {
2069 if (d != &card->dapm && d->bias_level != d->target_bias_level)
2070 async_schedule_domain(dapm_post_sequence_async, d,
2071 &async_domain);
2072 }
2073 async_synchronize_full_domain(&async_domain);
2074 /* Run card bias changes at last */
2075 dapm_post_sequence_async(&card->dapm, 0);
2076
2077 /* do we need to notify any clients that DAPM event is complete */
2078 for_each_card_dapms(card, d) {
2079 if (!d->component)
2080 continue;
2081
2082 ret = snd_soc_component_stream_event(d->component, event);
2083 if (ret < 0)
2084 return ret;
2085 }
2086
2087 pop_dbg(card->dev, card->pop_time,
2088 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
2089 pop_wait(card->pop_time);
2090
2091 trace_snd_soc_dapm_done(card);
2092
2093 return 0;
2094}
2095
2096#ifdef CONFIG_DEBUG_FS
2097static ssize_t dapm_widget_power_read_file(struct file *file,
2098 char __user *user_buf,
2099 size_t count, loff_t *ppos)
2100{
2101 struct snd_soc_dapm_widget *w = file->private_data;
2102 enum snd_soc_dapm_direction dir, rdir;
2103 char *buf;
2104 int in, out;
2105 ssize_t ret;
2106 struct snd_soc_dapm_path *p = NULL;
2107
2108 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
2109 if (!buf)
2110 return -ENOMEM;
2111
2112 snd_soc_dapm_mutex_lock_root(w->dapm);
2113
2114 /* Supply widgets are not handled by is_connected_{input,output}_ep() */
2115 if (w->is_supply) {
2116 in = 0;
2117 out = 0;
2118 } else {
2119 in = is_connected_input_ep(w, NULL, NULL);
2120 out = is_connected_output_ep(w, NULL, NULL);
2121 }
2122
2123 ret = scnprintf(buf, PAGE_SIZE, "%s: %s%s in %d out %d",
2124 w->name, w->power ? "On" : "Off",
2125 w->force ? " (forced)" : "", in, out);
2126
2127 if (w->reg >= 0)
2128 ret += scnprintf(buf + ret, PAGE_SIZE - ret,
2129 " - R%d(0x%x) mask 0x%x",
2130 w->reg, w->reg, w->mask << w->shift);
2131
2132 ret += scnprintf(buf + ret, PAGE_SIZE - ret, "\n");
2133
2134 if (w->sname)
2135 ret += scnprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
2136 w->sname,
2137 w->active ? "active" : "inactive");
2138
2139 snd_soc_dapm_for_each_direction(dir) {
2140 rdir = SND_SOC_DAPM_DIR_REVERSE(dir);
2141 snd_soc_dapm_widget_for_each_path(w, dir, p) {
2142 if (p->connected && !p->connected(p->source, p->sink))
2143 continue;
2144
2145 if (!p->connect)
2146 continue;
2147
2148 ret += scnprintf(buf + ret, PAGE_SIZE - ret,
2149 " %s \"%s\" \"%s\"\n",
2150 (rdir == SND_SOC_DAPM_DIR_IN) ? "in" : "out",
2151 p->name ? p->name : "static",
2152 p->node[rdir]->name);
2153 }
2154 }
2155
2156 snd_soc_dapm_mutex_unlock(w->dapm);
2157
2158 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
2159
2160 kfree(buf);
2161 return ret;
2162}
2163
2164static const struct file_operations dapm_widget_power_fops = {
2165 .open = simple_open,
2166 .read = dapm_widget_power_read_file,
2167 .llseek = default_llseek,
2168};
2169
2170static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
2171 size_t count, loff_t *ppos)
2172{
2173 struct snd_soc_dapm_context *dapm = file->private_data;
2174 char *level;
2175
2176 switch (dapm->bias_level) {
2177 case SND_SOC_BIAS_ON:
2178 level = "On\n";
2179 break;
2180 case SND_SOC_BIAS_PREPARE:
2181 level = "Prepare\n";
2182 break;
2183 case SND_SOC_BIAS_STANDBY:
2184 level = "Standby\n";
2185 break;
2186 case SND_SOC_BIAS_OFF:
2187 level = "Off\n";
2188 break;
2189 default:
2190 WARN(1, "Unknown bias_level %d\n", dapm->bias_level);
2191 level = "Unknown\n";
2192 break;
2193 }
2194
2195 return simple_read_from_buffer(user_buf, count, ppos, level,
2196 strlen(level));
2197}
2198
2199static const struct file_operations dapm_bias_fops = {
2200 .open = simple_open,
2201 .read = dapm_bias_read_file,
2202 .llseek = default_llseek,
2203};
2204
2205void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
2206 struct dentry *parent)
2207{
2208 if (!parent || IS_ERR(parent))
2209 return;
2210
2211 dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
2212
2213 debugfs_create_file("bias_level", 0444, dapm->debugfs_dapm, dapm,
2214 &dapm_bias_fops);
2215}
2216
2217static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
2218{
2219 struct snd_soc_dapm_context *dapm = w->dapm;
2220
2221 if (!dapm->debugfs_dapm || !w->name)
2222 return;
2223
2224 debugfs_create_file(w->name, 0444, dapm->debugfs_dapm, w,
2225 &dapm_widget_power_fops);
2226}
2227
2228static void dapm_debugfs_free_widget(struct snd_soc_dapm_widget *w)
2229{
2230 struct snd_soc_dapm_context *dapm = w->dapm;
2231
2232 if (!dapm->debugfs_dapm || !w->name)
2233 return;
2234
2235 debugfs_lookup_and_remove(w->name, dapm->debugfs_dapm);
2236}
2237
2238static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
2239{
2240 debugfs_remove_recursive(dapm->debugfs_dapm);
2241 dapm->debugfs_dapm = NULL;
2242}
2243
2244#else
2245void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
2246 struct dentry *parent)
2247{
2248}
2249
2250static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
2251{
2252}
2253
2254static inline void dapm_debugfs_free_widget(struct snd_soc_dapm_widget *w)
2255{
2256}
2257
2258static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
2259{
2260}
2261
2262#endif
2263
2264/*
2265 * soc_dapm_connect_path() - Connects or disconnects a path
2266 * @path: The path to update
2267 * @connect: The new connect state of the path. True if the path is connected,
2268 * false if it is disconnected.
2269 * @reason: The reason why the path changed (for debugging only)
2270 */
2271static void soc_dapm_connect_path(struct snd_soc_dapm_path *path,
2272 bool connect, const char *reason)
2273{
2274 if (path->connect == connect)
2275 return;
2276
2277 path->connect = connect;
2278 dapm_mark_dirty(path->source, reason);
2279 dapm_mark_dirty(path->sink, reason);
2280 dapm_path_invalidate(path);
2281}
2282
2283/* test and update the power status of a mux widget */
2284static int soc_dapm_mux_update_power(struct snd_soc_card *card,
2285 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e)
2286{
2287 struct snd_soc_dapm_path *path;
2288 int found = 0;
2289 bool connect;
2290
2291 snd_soc_dapm_mutex_assert_held(card);
2292
2293 /* find dapm widget path assoc with kcontrol */
2294 dapm_kcontrol_for_each_path(path, kcontrol) {
2295 found = 1;
2296 /* we now need to match the string in the enum to the path */
2297 if (e && !(strcmp(path->name, e->texts[mux])))
2298 connect = true;
2299 else
2300 connect = false;
2301
2302 soc_dapm_connect_path(path, connect, "mux update");
2303 }
2304
2305 if (found)
2306 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2307
2308 return found;
2309}
2310
2311int snd_soc_dapm_mux_update_power(struct snd_soc_dapm_context *dapm,
2312 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e,
2313 struct snd_soc_dapm_update *update)
2314{
2315 struct snd_soc_card *card = dapm->card;
2316 int ret;
2317
2318 snd_soc_dapm_mutex_lock(card);
2319 card->update = update;
2320 ret = soc_dapm_mux_update_power(card, kcontrol, mux, e);
2321 card->update = NULL;
2322 snd_soc_dapm_mutex_unlock(card);
2323 if (ret > 0)
2324 snd_soc_dpcm_runtime_update(card);
2325 return ret;
2326}
2327EXPORT_SYMBOL_GPL(snd_soc_dapm_mux_update_power);
2328
2329/* test and update the power status of a mixer or switch widget */
2330static int soc_dapm_mixer_update_power(struct snd_soc_card *card,
2331 struct snd_kcontrol *kcontrol,
2332 int connect, int rconnect)
2333{
2334 struct snd_soc_dapm_path *path;
2335 int found = 0;
2336
2337 snd_soc_dapm_mutex_assert_held(card);
2338
2339 /* find dapm widget path assoc with kcontrol */
2340 dapm_kcontrol_for_each_path(path, kcontrol) {
2341 /*
2342 * Ideally this function should support any number of
2343 * paths and channels. But since kcontrols only come
2344 * in mono and stereo variants, we are limited to 2
2345 * channels.
2346 *
2347 * The following code assumes for stereo controls the
2348 * first path (when 'found == 0') is the left channel,
2349 * and all remaining paths (when 'found == 1') are the
2350 * right channel.
2351 *
2352 * A stereo control is signified by a valid 'rconnect'
2353 * value, either 0 for unconnected, or >= 0 for connected.
2354 * This is chosen instead of using snd_soc_volsw_is_stereo,
2355 * so that the behavior of snd_soc_dapm_mixer_update_power
2356 * doesn't change even when the kcontrol passed in is
2357 * stereo.
2358 *
2359 * It passes 'connect' as the path connect status for
2360 * the left channel, and 'rconnect' for the right
2361 * channel.
2362 */
2363 if (found && rconnect >= 0)
2364 soc_dapm_connect_path(path, rconnect, "mixer update");
2365 else
2366 soc_dapm_connect_path(path, connect, "mixer update");
2367 found = 1;
2368 }
2369
2370 if (found)
2371 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2372
2373 return found;
2374}
2375
2376int snd_soc_dapm_mixer_update_power(struct snd_soc_dapm_context *dapm,
2377 struct snd_kcontrol *kcontrol, int connect,
2378 struct snd_soc_dapm_update *update)
2379{
2380 struct snd_soc_card *card = dapm->card;
2381 int ret;
2382
2383 snd_soc_dapm_mutex_lock(card);
2384 card->update = update;
2385 ret = soc_dapm_mixer_update_power(card, kcontrol, connect, -1);
2386 card->update = NULL;
2387 snd_soc_dapm_mutex_unlock(card);
2388 if (ret > 0)
2389 snd_soc_dpcm_runtime_update(card);
2390 return ret;
2391}
2392EXPORT_SYMBOL_GPL(snd_soc_dapm_mixer_update_power);
2393
2394static ssize_t dapm_widget_show_component(struct snd_soc_component *cmpnt,
2395 char *buf, int count)
2396{
2397 struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(cmpnt);
2398 struct snd_soc_dapm_widget *w;
2399 char *state = "not set";
2400
2401 /* card won't be set for the dummy component, as a spot fix
2402 * we're checking for that case specifically here but in future
2403 * we will ensure that the dummy component looks like others.
2404 */
2405 if (!cmpnt->card)
2406 return 0;
2407
2408 for_each_card_widgets(cmpnt->card, w) {
2409 if (w->dapm != dapm)
2410 continue;
2411
2412 /* only display widgets that burn power */
2413 switch (w->id) {
2414 case snd_soc_dapm_hp:
2415 case snd_soc_dapm_mic:
2416 case snd_soc_dapm_spk:
2417 case snd_soc_dapm_line:
2418 case snd_soc_dapm_micbias:
2419 case snd_soc_dapm_dac:
2420 case snd_soc_dapm_adc:
2421 case snd_soc_dapm_pga:
2422 case snd_soc_dapm_effect:
2423 case snd_soc_dapm_out_drv:
2424 case snd_soc_dapm_mixer:
2425 case snd_soc_dapm_mixer_named_ctl:
2426 case snd_soc_dapm_supply:
2427 case snd_soc_dapm_regulator_supply:
2428 case snd_soc_dapm_pinctrl:
2429 case snd_soc_dapm_clock_supply:
2430 if (w->name)
2431 count += sysfs_emit_at(buf, count, "%s: %s\n",
2432 w->name, w->power ? "On":"Off");
2433 break;
2434 default:
2435 break;
2436 }
2437 }
2438
2439 switch (snd_soc_dapm_get_bias_level(dapm)) {
2440 case SND_SOC_BIAS_ON:
2441 state = "On";
2442 break;
2443 case SND_SOC_BIAS_PREPARE:
2444 state = "Prepare";
2445 break;
2446 case SND_SOC_BIAS_STANDBY:
2447 state = "Standby";
2448 break;
2449 case SND_SOC_BIAS_OFF:
2450 state = "Off";
2451 break;
2452 }
2453 count += sysfs_emit_at(buf, count, "PM State: %s\n", state);
2454
2455 return count;
2456}
2457
2458/* show dapm widget status in sys fs */
2459static ssize_t dapm_widget_show(struct device *dev,
2460 struct device_attribute *attr, char *buf)
2461{
2462 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
2463 struct snd_soc_dai *codec_dai;
2464 int i, count = 0;
2465
2466 snd_soc_dapm_mutex_lock_root(rtd->card);
2467
2468 for_each_rtd_codec_dais(rtd, i, codec_dai) {
2469 struct snd_soc_component *cmpnt = codec_dai->component;
2470
2471 count = dapm_widget_show_component(cmpnt, buf, count);
2472 }
2473
2474 snd_soc_dapm_mutex_unlock(rtd->card);
2475
2476 return count;
2477}
2478
2479static DEVICE_ATTR_RO(dapm_widget);
2480
2481struct attribute *soc_dapm_dev_attrs[] = {
2482 &dev_attr_dapm_widget.attr,
2483 NULL
2484};
2485
2486static void dapm_free_path(struct snd_soc_dapm_path *path)
2487{
2488 list_del(&path->list_node[SND_SOC_DAPM_DIR_IN]);
2489 list_del(&path->list_node[SND_SOC_DAPM_DIR_OUT]);
2490 list_del(&path->list_kcontrol);
2491 list_del(&path->list);
2492 kfree(path);
2493}
2494
2495/**
2496 * snd_soc_dapm_free_widget - Free specified widget
2497 * @w: widget to free
2498 *
2499 * Removes widget from all paths and frees memory occupied by it.
2500 */
2501void snd_soc_dapm_free_widget(struct snd_soc_dapm_widget *w)
2502{
2503 struct snd_soc_dapm_path *p, *next_p;
2504 enum snd_soc_dapm_direction dir;
2505
2506 if (!w)
2507 return;
2508
2509 list_del(&w->list);
2510 list_del(&w->dirty);
2511 /*
2512 * remove source and sink paths associated to this widget.
2513 * While removing the path, remove reference to it from both
2514 * source and sink widgets so that path is removed only once.
2515 */
2516 snd_soc_dapm_for_each_direction(dir) {
2517 snd_soc_dapm_widget_for_each_path_safe(w, dir, p, next_p)
2518 dapm_free_path(p);
2519 }
2520
2521 dapm_debugfs_free_widget(w);
2522
2523 kfree(w->kcontrols);
2524 kfree_const(w->name);
2525 kfree_const(w->sname);
2526 kfree(w);
2527}
2528EXPORT_SYMBOL_GPL(snd_soc_dapm_free_widget);
2529
2530/* free all dapm widgets and resources */
2531static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
2532{
2533 struct snd_soc_dapm_widget *w, *next_w;
2534
2535 for_each_card_widgets_safe(dapm->card, w, next_w) {
2536 if (w->dapm != dapm)
2537 continue;
2538 snd_soc_dapm_free_widget(w);
2539 }
2540
2541 dapm->wcache_sink = NULL;
2542 dapm->wcache_source = NULL;
2543}
2544
2545static struct snd_soc_dapm_widget *dapm_find_widget(
2546 struct snd_soc_dapm_context *dapm, const char *pin,
2547 bool search_other_contexts)
2548{
2549 struct snd_soc_dapm_widget *w;
2550 struct snd_soc_dapm_widget *fallback = NULL;
2551 char prefixed_pin[80];
2552 const char *pin_name;
2553 const char *prefix = soc_dapm_prefix(dapm);
2554
2555 if (prefix) {
2556 snprintf(prefixed_pin, sizeof(prefixed_pin), "%s %s",
2557 prefix, pin);
2558 pin_name = prefixed_pin;
2559 } else {
2560 pin_name = pin;
2561 }
2562
2563 for_each_card_widgets(dapm->card, w) {
2564 if (!strcmp(w->name, pin_name)) {
2565 if (w->dapm == dapm)
2566 return w;
2567 else
2568 fallback = w;
2569 }
2570 }
2571
2572 if (search_other_contexts)
2573 return fallback;
2574
2575 return NULL;
2576}
2577
2578/*
2579 * set the DAPM pin status:
2580 * returns 1 when the value has been updated, 0 when unchanged, or a negative
2581 * error code; called from kcontrol put callback
2582 */
2583static int __snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
2584 const char *pin, int status)
2585{
2586 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2587 int ret = 0;
2588
2589 dapm_assert_locked(dapm);
2590
2591 if (!w) {
2592 dev_err(dapm->dev, "ASoC: DAPM unknown pin %s\n", pin);
2593 return -EINVAL;
2594 }
2595
2596 if (w->connected != status) {
2597 dapm_mark_dirty(w, "pin configuration");
2598 dapm_widget_invalidate_input_paths(w);
2599 dapm_widget_invalidate_output_paths(w);
2600 ret = 1;
2601 }
2602
2603 w->connected = status;
2604 if (status == 0)
2605 w->force = 0;
2606
2607 return ret;
2608}
2609
2610/*
2611 * similar as __snd_soc_dapm_set_pin(), but returns 0 when successful;
2612 * called from several API functions below
2613 */
2614static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
2615 const char *pin, int status)
2616{
2617 int ret = __snd_soc_dapm_set_pin(dapm, pin, status);
2618
2619 return ret < 0 ? ret : 0;
2620}
2621
2622/**
2623 * snd_soc_dapm_sync_unlocked - scan and power dapm paths
2624 * @dapm: DAPM context
2625 *
2626 * Walks all dapm audio paths and powers widgets according to their
2627 * stream or path usage.
2628 *
2629 * Requires external locking.
2630 *
2631 * Returns 0 for success.
2632 */
2633int snd_soc_dapm_sync_unlocked(struct snd_soc_dapm_context *dapm)
2634{
2635 /*
2636 * Suppress early reports (eg, jacks syncing their state) to avoid
2637 * silly DAPM runs during card startup.
2638 */
2639 if (!snd_soc_card_is_instantiated(dapm->card))
2640 return 0;
2641
2642 return dapm_power_widgets(dapm->card, SND_SOC_DAPM_STREAM_NOP);
2643}
2644EXPORT_SYMBOL_GPL(snd_soc_dapm_sync_unlocked);
2645
2646/**
2647 * snd_soc_dapm_sync - scan and power dapm paths
2648 * @dapm: DAPM context
2649 *
2650 * Walks all dapm audio paths and powers widgets according to their
2651 * stream or path usage.
2652 *
2653 * Returns 0 for success.
2654 */
2655int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
2656{
2657 int ret;
2658
2659 snd_soc_dapm_mutex_lock(dapm);
2660 ret = snd_soc_dapm_sync_unlocked(dapm);
2661 snd_soc_dapm_mutex_unlock(dapm);
2662 return ret;
2663}
2664EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
2665
2666static int dapm_update_dai_chan(struct snd_soc_dapm_path *p,
2667 struct snd_soc_dapm_widget *w,
2668 int channels)
2669{
2670 switch (w->id) {
2671 case snd_soc_dapm_aif_out:
2672 case snd_soc_dapm_aif_in:
2673 break;
2674 default:
2675 return 0;
2676 }
2677
2678 dev_dbg(w->dapm->dev, "%s DAI route %s -> %s\n",
2679 w->channel < channels ? "Connecting" : "Disconnecting",
2680 p->source->name, p->sink->name);
2681
2682 if (w->channel < channels)
2683 soc_dapm_connect_path(p, true, "dai update");
2684 else
2685 soc_dapm_connect_path(p, false, "dai update");
2686
2687 return 0;
2688}
2689
2690static int dapm_update_dai_unlocked(struct snd_pcm_substream *substream,
2691 struct snd_pcm_hw_params *params,
2692 struct snd_soc_dai *dai)
2693{
2694 int dir = substream->stream;
2695 int channels = params_channels(params);
2696 struct snd_soc_dapm_path *p;
2697 struct snd_soc_dapm_widget *w;
2698 int ret;
2699
2700 w = snd_soc_dai_get_widget(dai, dir);
2701
2702 if (!w)
2703 return 0;
2704
2705 dev_dbg(dai->dev, "Update DAI routes for %s %s\n", dai->name,
2706 dir == SNDRV_PCM_STREAM_PLAYBACK ? "playback" : "capture");
2707
2708 snd_soc_dapm_widget_for_each_sink_path(w, p) {
2709 ret = dapm_update_dai_chan(p, p->sink, channels);
2710 if (ret < 0)
2711 return ret;
2712 }
2713
2714 snd_soc_dapm_widget_for_each_source_path(w, p) {
2715 ret = dapm_update_dai_chan(p, p->source, channels);
2716 if (ret < 0)
2717 return ret;
2718 }
2719
2720 return 0;
2721}
2722
2723int snd_soc_dapm_update_dai(struct snd_pcm_substream *substream,
2724 struct snd_pcm_hw_params *params,
2725 struct snd_soc_dai *dai)
2726{
2727 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
2728 int ret;
2729
2730 snd_soc_dapm_mutex_lock(rtd->card);
2731 ret = dapm_update_dai_unlocked(substream, params, dai);
2732 snd_soc_dapm_mutex_unlock(rtd->card);
2733
2734 return ret;
2735}
2736EXPORT_SYMBOL_GPL(snd_soc_dapm_update_dai);
2737
2738int snd_soc_dapm_widget_name_cmp(struct snd_soc_dapm_widget *widget, const char *s)
2739{
2740 struct snd_soc_component *component = snd_soc_dapm_to_component(widget->dapm);
2741 const char *wname = widget->name;
2742
2743 if (component->name_prefix)
2744 wname += strlen(component->name_prefix) + 1; /* plus space */
2745
2746 return strcmp(wname, s);
2747}
2748EXPORT_SYMBOL_GPL(snd_soc_dapm_widget_name_cmp);
2749
2750/*
2751 * dapm_update_widget_flags() - Re-compute widget sink and source flags
2752 * @w: The widget for which to update the flags
2753 *
2754 * Some widgets have a dynamic category which depends on which neighbors they
2755 * are connected to. This function update the category for these widgets.
2756 *
2757 * This function must be called whenever a path is added or removed to a widget.
2758 */
2759static void dapm_update_widget_flags(struct snd_soc_dapm_widget *w)
2760{
2761 enum snd_soc_dapm_direction dir;
2762 struct snd_soc_dapm_path *p;
2763 unsigned int ep;
2764
2765 switch (w->id) {
2766 case snd_soc_dapm_input:
2767 /* On a fully routed card an input is never a source */
2768 if (w->dapm->card->fully_routed)
2769 return;
2770 ep = SND_SOC_DAPM_EP_SOURCE;
2771 snd_soc_dapm_widget_for_each_source_path(w, p) {
2772 if (p->source->id == snd_soc_dapm_micbias ||
2773 p->source->id == snd_soc_dapm_mic ||
2774 p->source->id == snd_soc_dapm_line ||
2775 p->source->id == snd_soc_dapm_output) {
2776 ep = 0;
2777 break;
2778 }
2779 }
2780 break;
2781 case snd_soc_dapm_output:
2782 /* On a fully routed card a output is never a sink */
2783 if (w->dapm->card->fully_routed)
2784 return;
2785 ep = SND_SOC_DAPM_EP_SINK;
2786 snd_soc_dapm_widget_for_each_sink_path(w, p) {
2787 if (p->sink->id == snd_soc_dapm_spk ||
2788 p->sink->id == snd_soc_dapm_hp ||
2789 p->sink->id == snd_soc_dapm_line ||
2790 p->sink->id == snd_soc_dapm_input) {
2791 ep = 0;
2792 break;
2793 }
2794 }
2795 break;
2796 case snd_soc_dapm_line:
2797 ep = 0;
2798 snd_soc_dapm_for_each_direction(dir) {
2799 if (!list_empty(&w->edges[dir]))
2800 ep |= SND_SOC_DAPM_DIR_TO_EP(dir);
2801 }
2802 break;
2803 default:
2804 return;
2805 }
2806
2807 w->is_ep = ep;
2808}
2809
2810static int snd_soc_dapm_check_dynamic_path(struct snd_soc_dapm_context *dapm,
2811 struct snd_soc_dapm_widget *source, struct snd_soc_dapm_widget *sink,
2812 const char *control)
2813{
2814 bool dynamic_source = false;
2815 bool dynamic_sink = false;
2816
2817 if (!control)
2818 return 0;
2819
2820 switch (source->id) {
2821 case snd_soc_dapm_demux:
2822 dynamic_source = true;
2823 break;
2824 default:
2825 break;
2826 }
2827
2828 switch (sink->id) {
2829 case snd_soc_dapm_mux:
2830 case snd_soc_dapm_switch:
2831 case snd_soc_dapm_mixer:
2832 case snd_soc_dapm_mixer_named_ctl:
2833 dynamic_sink = true;
2834 break;
2835 default:
2836 break;
2837 }
2838
2839 if (dynamic_source && dynamic_sink) {
2840 dev_err(dapm->dev,
2841 "Direct connection between demux and mixer/mux not supported for path %s -> [%s] -> %s\n",
2842 source->name, control, sink->name);
2843 return -EINVAL;
2844 } else if (!dynamic_source && !dynamic_sink) {
2845 dev_err(dapm->dev,
2846 "Control not supported for path %s -> [%s] -> %s\n",
2847 source->name, control, sink->name);
2848 return -EINVAL;
2849 }
2850
2851 return 0;
2852}
2853
2854static int snd_soc_dapm_add_path(struct snd_soc_dapm_context *dapm,
2855 struct snd_soc_dapm_widget *wsource, struct snd_soc_dapm_widget *wsink,
2856 const char *control,
2857 int (*connected)(struct snd_soc_dapm_widget *source,
2858 struct snd_soc_dapm_widget *sink))
2859{
2860 enum snd_soc_dapm_direction dir;
2861 struct snd_soc_dapm_path *path;
2862 int ret;
2863
2864 if (wsink->is_supply && !wsource->is_supply) {
2865 dev_err(dapm->dev,
2866 "Connecting non-supply widget to supply widget is not supported (%s -> %s)\n",
2867 wsource->name, wsink->name);
2868 return -EINVAL;
2869 }
2870
2871 if (connected && !wsource->is_supply) {
2872 dev_err(dapm->dev,
2873 "connected() callback only supported for supply widgets (%s -> %s)\n",
2874 wsource->name, wsink->name);
2875 return -EINVAL;
2876 }
2877
2878 if (wsource->is_supply && control) {
2879 dev_err(dapm->dev,
2880 "Conditional paths are not supported for supply widgets (%s -> [%s] -> %s)\n",
2881 wsource->name, control, wsink->name);
2882 return -EINVAL;
2883 }
2884
2885 ret = snd_soc_dapm_check_dynamic_path(dapm, wsource, wsink, control);
2886 if (ret)
2887 return ret;
2888
2889 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
2890 if (!path)
2891 return -ENOMEM;
2892
2893 path->node[SND_SOC_DAPM_DIR_IN] = wsource;
2894 path->node[SND_SOC_DAPM_DIR_OUT] = wsink;
2895
2896 path->connected = connected;
2897 INIT_LIST_HEAD(&path->list);
2898 INIT_LIST_HEAD(&path->list_kcontrol);
2899
2900 if (wsource->is_supply || wsink->is_supply)
2901 path->is_supply = 1;
2902
2903 /* connect static paths */
2904 if (control == NULL) {
2905 path->connect = 1;
2906 } else {
2907 switch (wsource->id) {
2908 case snd_soc_dapm_demux:
2909 ret = dapm_connect_mux(dapm, path, control, wsource);
2910 if (ret)
2911 goto err;
2912 break;
2913 default:
2914 break;
2915 }
2916
2917 switch (wsink->id) {
2918 case snd_soc_dapm_mux:
2919 ret = dapm_connect_mux(dapm, path, control, wsink);
2920 if (ret != 0)
2921 goto err;
2922 break;
2923 case snd_soc_dapm_switch:
2924 case snd_soc_dapm_mixer:
2925 case snd_soc_dapm_mixer_named_ctl:
2926 ret = dapm_connect_mixer(dapm, path, control);
2927 if (ret != 0)
2928 goto err;
2929 break;
2930 default:
2931 break;
2932 }
2933 }
2934
2935 list_add(&path->list, &dapm->card->paths);
2936
2937 snd_soc_dapm_for_each_direction(dir)
2938 list_add(&path->list_node[dir], &path->node[dir]->edges[dir]);
2939
2940 snd_soc_dapm_for_each_direction(dir) {
2941 dapm_update_widget_flags(path->node[dir]);
2942 dapm_mark_dirty(path->node[dir], "Route added");
2943 }
2944
2945 if (snd_soc_card_is_instantiated(dapm->card) && path->connect)
2946 dapm_path_invalidate(path);
2947
2948 return 0;
2949err:
2950 kfree(path);
2951 return ret;
2952}
2953
2954static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
2955 const struct snd_soc_dapm_route *route)
2956{
2957 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
2958 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
2959 const char *sink;
2960 const char *source;
2961 char prefixed_sink[80];
2962 char prefixed_source[80];
2963 const char *prefix;
2964 unsigned int sink_ref = 0;
2965 unsigned int source_ref = 0;
2966 int ret;
2967
2968 prefix = soc_dapm_prefix(dapm);
2969 if (prefix) {
2970 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
2971 prefix, route->sink);
2972 sink = prefixed_sink;
2973 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
2974 prefix, route->source);
2975 source = prefixed_source;
2976 } else {
2977 sink = route->sink;
2978 source = route->source;
2979 }
2980
2981 wsource = dapm_wcache_lookup(dapm->wcache_source, source);
2982 wsink = dapm_wcache_lookup(dapm->wcache_sink, sink);
2983
2984 if (wsink && wsource)
2985 goto skip_search;
2986
2987 /*
2988 * find src and dest widgets over all widgets but favor a widget from
2989 * current DAPM context
2990 */
2991 for_each_card_widgets(dapm->card, w) {
2992 if (!wsink && !(strcmp(w->name, sink))) {
2993 wtsink = w;
2994 if (w->dapm == dapm) {
2995 wsink = w;
2996 if (wsource)
2997 break;
2998 }
2999 sink_ref++;
3000 if (sink_ref > 1)
3001 dev_warn(dapm->dev,
3002 "ASoC: sink widget %s overwritten\n",
3003 w->name);
3004 continue;
3005 }
3006 if (!wsource && !(strcmp(w->name, source))) {
3007 wtsource = w;
3008 if (w->dapm == dapm) {
3009 wsource = w;
3010 if (wsink)
3011 break;
3012 }
3013 source_ref++;
3014 if (source_ref > 1)
3015 dev_warn(dapm->dev,
3016 "ASoC: source widget %s overwritten\n",
3017 w->name);
3018 }
3019 }
3020 /* use widget from another DAPM context if not found from this */
3021 if (!wsink)
3022 wsink = wtsink;
3023 if (!wsource)
3024 wsource = wtsource;
3025
3026 ret = -ENODEV;
3027 if (!wsource)
3028 goto err;
3029 if (!wsink)
3030 goto err;
3031
3032skip_search:
3033 /* update cache */
3034 dapm->wcache_sink = wsink;
3035 dapm->wcache_source = wsource;
3036
3037 ret = snd_soc_dapm_add_path(dapm, wsource, wsink, route->control,
3038 route->connected);
3039err:
3040 if (ret)
3041 dev_err(dapm->dev, "ASoC: Failed to add route %s%s -%s%s%s> %s%s\n",
3042 source, !wsource ? "(*)" : "",
3043 !route->control ? "" : "> [",
3044 !route->control ? "" : route->control,
3045 !route->control ? "" : "] -",
3046 sink, !wsink ? "(*)" : "");
3047 return ret;
3048}
3049
3050static int snd_soc_dapm_del_route(struct snd_soc_dapm_context *dapm,
3051 const struct snd_soc_dapm_route *route)
3052{
3053 struct snd_soc_dapm_path *path, *p;
3054 const char *sink;
3055 const char *source;
3056 char prefixed_sink[80];
3057 char prefixed_source[80];
3058 const char *prefix;
3059
3060 if (route->control) {
3061 dev_err(dapm->dev,
3062 "ASoC: Removal of routes with controls not supported\n");
3063 return -EINVAL;
3064 }
3065
3066 prefix = soc_dapm_prefix(dapm);
3067 if (prefix) {
3068 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
3069 prefix, route->sink);
3070 sink = prefixed_sink;
3071 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
3072 prefix, route->source);
3073 source = prefixed_source;
3074 } else {
3075 sink = route->sink;
3076 source = route->source;
3077 }
3078
3079 path = NULL;
3080 list_for_each_entry(p, &dapm->card->paths, list) {
3081 if (strcmp(p->source->name, source) != 0)
3082 continue;
3083 if (strcmp(p->sink->name, sink) != 0)
3084 continue;
3085 path = p;
3086 break;
3087 }
3088
3089 if (path) {
3090 struct snd_soc_dapm_widget *wsource = path->source;
3091 struct snd_soc_dapm_widget *wsink = path->sink;
3092
3093 dapm_mark_dirty(wsource, "Route removed");
3094 dapm_mark_dirty(wsink, "Route removed");
3095 if (path->connect)
3096 dapm_path_invalidate(path);
3097
3098 dapm_free_path(path);
3099
3100 /* Update any path related flags */
3101 dapm_update_widget_flags(wsource);
3102 dapm_update_widget_flags(wsink);
3103 } else {
3104 dev_warn(dapm->dev, "ASoC: Route %s->%s does not exist\n",
3105 source, sink);
3106 }
3107
3108 return 0;
3109}
3110
3111/**
3112 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
3113 * @dapm: DAPM context
3114 * @route: audio routes
3115 * @num: number of routes
3116 *
3117 * Connects 2 dapm widgets together via a named audio path. The sink is
3118 * the widget receiving the audio signal, whilst the source is the sender
3119 * of the audio signal.
3120 *
3121 * Returns 0 for success else error. On error all resources can be freed
3122 * with a call to snd_soc_card_free().
3123 */
3124int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
3125 const struct snd_soc_dapm_route *route, int num)
3126{
3127 int i, ret = 0;
3128
3129 snd_soc_dapm_mutex_lock(dapm);
3130 for (i = 0; i < num; i++) {
3131 int r = snd_soc_dapm_add_route(dapm, route);
3132 if (r < 0)
3133 ret = r;
3134 route++;
3135 }
3136 snd_soc_dapm_mutex_unlock(dapm);
3137
3138 return ret;
3139}
3140EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
3141
3142/**
3143 * snd_soc_dapm_del_routes - Remove routes between DAPM widgets
3144 * @dapm: DAPM context
3145 * @route: audio routes
3146 * @num: number of routes
3147 *
3148 * Removes routes from the DAPM context.
3149 */
3150int snd_soc_dapm_del_routes(struct snd_soc_dapm_context *dapm,
3151 const struct snd_soc_dapm_route *route, int num)
3152{
3153 int i;
3154
3155 snd_soc_dapm_mutex_lock(dapm);
3156 for (i = 0; i < num; i++) {
3157 snd_soc_dapm_del_route(dapm, route);
3158 route++;
3159 }
3160 snd_soc_dapm_mutex_unlock(dapm);
3161
3162 return 0;
3163}
3164EXPORT_SYMBOL_GPL(snd_soc_dapm_del_routes);
3165
3166static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm,
3167 const struct snd_soc_dapm_route *route)
3168{
3169 struct snd_soc_dapm_widget *source = dapm_find_widget(dapm,
3170 route->source,
3171 true);
3172 struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm,
3173 route->sink,
3174 true);
3175 struct snd_soc_dapm_path *path;
3176 int count = 0;
3177
3178 if (!source) {
3179 dev_err(dapm->dev, "ASoC: Unable to find source %s for weak route\n",
3180 route->source);
3181 return -ENODEV;
3182 }
3183
3184 if (!sink) {
3185 dev_err(dapm->dev, "ASoC: Unable to find sink %s for weak route\n",
3186 route->sink);
3187 return -ENODEV;
3188 }
3189
3190 if (route->control || route->connected)
3191 dev_warn(dapm->dev, "ASoC: Ignoring control for weak route %s->%s\n",
3192 route->source, route->sink);
3193
3194 snd_soc_dapm_widget_for_each_sink_path(source, path) {
3195 if (path->sink == sink) {
3196 path->weak = 1;
3197 count++;
3198 }
3199 }
3200
3201 if (count == 0)
3202 dev_err(dapm->dev, "ASoC: No path found for weak route %s->%s\n",
3203 route->source, route->sink);
3204 if (count > 1)
3205 dev_warn(dapm->dev, "ASoC: %d paths found for weak route %s->%s\n",
3206 count, route->source, route->sink);
3207
3208 return 0;
3209}
3210
3211/**
3212 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
3213 * @dapm: DAPM context
3214 * @route: audio routes
3215 * @num: number of routes
3216 *
3217 * Mark existing routes matching those specified in the passed array
3218 * as being weak, meaning that they are ignored for the purpose of
3219 * power decisions. The main intended use case is for sidetone paths
3220 * which couple audio between other independent paths if they are both
3221 * active in order to make the combination work better at the user
3222 * level but which aren't intended to be "used".
3223 *
3224 * Note that CODEC drivers should not use this as sidetone type paths
3225 * can frequently also be used as bypass paths.
3226 */
3227int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm,
3228 const struct snd_soc_dapm_route *route, int num)
3229{
3230 int i;
3231 int ret = 0;
3232
3233 snd_soc_dapm_mutex_lock_root(dapm);
3234 for (i = 0; i < num; i++) {
3235 int err = snd_soc_dapm_weak_route(dapm, route);
3236 if (err)
3237 ret = err;
3238 route++;
3239 }
3240 snd_soc_dapm_mutex_unlock(dapm);
3241
3242 return ret;
3243}
3244EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes);
3245
3246/**
3247 * snd_soc_dapm_new_widgets - add new dapm widgets
3248 * @card: card to be checked for new dapm widgets
3249 *
3250 * Checks the codec for any new dapm widgets and creates them if found.
3251 *
3252 * Returns 0 for success.
3253 */
3254int snd_soc_dapm_new_widgets(struct snd_soc_card *card)
3255{
3256 struct snd_soc_dapm_widget *w;
3257 unsigned int val;
3258
3259 snd_soc_dapm_mutex_lock_root(card);
3260
3261 for_each_card_widgets(card, w)
3262 {
3263 if (w->new)
3264 continue;
3265
3266 if (w->num_kcontrols) {
3267 w->kcontrols = kcalloc(w->num_kcontrols,
3268 sizeof(struct snd_kcontrol *),
3269 GFP_KERNEL);
3270 if (!w->kcontrols) {
3271 snd_soc_dapm_mutex_unlock(card);
3272 return -ENOMEM;
3273 }
3274 }
3275
3276 switch(w->id) {
3277 case snd_soc_dapm_switch:
3278 case snd_soc_dapm_mixer:
3279 case snd_soc_dapm_mixer_named_ctl:
3280 dapm_new_mixer(w);
3281 break;
3282 case snd_soc_dapm_mux:
3283 case snd_soc_dapm_demux:
3284 dapm_new_mux(w);
3285 break;
3286 case snd_soc_dapm_pga:
3287 case snd_soc_dapm_effect:
3288 case snd_soc_dapm_out_drv:
3289 dapm_new_pga(w);
3290 break;
3291 case snd_soc_dapm_dai_link:
3292 dapm_new_dai_link(w);
3293 break;
3294 default:
3295 break;
3296 }
3297
3298 /* Read the initial power state from the device */
3299 if (w->reg >= 0) {
3300 val = soc_dapm_read(w->dapm, w->reg);
3301 val = val >> w->shift;
3302 val &= w->mask;
3303 if (val == w->on_val)
3304 w->power = 1;
3305 }
3306
3307 w->new = 1;
3308
3309 dapm_mark_dirty(w, "new widget");
3310 dapm_debugfs_add_widget(w);
3311 }
3312
3313 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
3314 snd_soc_dapm_mutex_unlock(card);
3315 return 0;
3316}
3317EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
3318
3319/**
3320 * snd_soc_dapm_get_volsw - dapm mixer get callback
3321 * @kcontrol: mixer control
3322 * @ucontrol: control element information
3323 *
3324 * Callback to get the value of a dapm mixer control.
3325 *
3326 * Returns 0 for success.
3327 */
3328int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
3329 struct snd_ctl_elem_value *ucontrol)
3330{
3331 struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
3332 struct soc_mixer_control *mc =
3333 (struct soc_mixer_control *)kcontrol->private_value;
3334 int reg = mc->reg;
3335 unsigned int shift = mc->shift;
3336 int max = mc->max;
3337 unsigned int width = fls(max);
3338 unsigned int mask = (1 << fls(max)) - 1;
3339 unsigned int invert = mc->invert;
3340 unsigned int reg_val, val, rval = 0;
3341
3342 snd_soc_dapm_mutex_lock(dapm);
3343 if (dapm_kcontrol_is_powered(kcontrol) && reg != SND_SOC_NOPM) {
3344 reg_val = soc_dapm_read(dapm, reg);
3345 val = (reg_val >> shift) & mask;
3346
3347 if (reg != mc->rreg)
3348 reg_val = soc_dapm_read(dapm, mc->rreg);
3349
3350 if (snd_soc_volsw_is_stereo(mc))
3351 rval = (reg_val >> mc->rshift) & mask;
3352 } else {
3353 reg_val = dapm_kcontrol_get_value(kcontrol);
3354 val = reg_val & mask;
3355
3356 if (snd_soc_volsw_is_stereo(mc))
3357 rval = (reg_val >> width) & mask;
3358 }
3359 snd_soc_dapm_mutex_unlock(dapm);
3360
3361 if (invert)
3362 ucontrol->value.integer.value[0] = max - val;
3363 else
3364 ucontrol->value.integer.value[0] = val;
3365
3366 if (snd_soc_volsw_is_stereo(mc)) {
3367 if (invert)
3368 ucontrol->value.integer.value[1] = max - rval;
3369 else
3370 ucontrol->value.integer.value[1] = rval;
3371 }
3372
3373 return 0;
3374}
3375EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
3376
3377/**
3378 * snd_soc_dapm_put_volsw - dapm mixer set callback
3379 * @kcontrol: mixer control
3380 * @ucontrol: control element information
3381 *
3382 * Callback to set the value of a dapm mixer control.
3383 *
3384 * Returns 0 for success.
3385 */
3386int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
3387 struct snd_ctl_elem_value *ucontrol)
3388{
3389 struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
3390 struct snd_soc_card *card = dapm->card;
3391 struct soc_mixer_control *mc =
3392 (struct soc_mixer_control *)kcontrol->private_value;
3393 int reg = mc->reg;
3394 unsigned int shift = mc->shift;
3395 int max = mc->max;
3396 unsigned int width = fls(max);
3397 unsigned int mask = (1 << width) - 1;
3398 unsigned int invert = mc->invert;
3399 unsigned int val, rval = 0;
3400 int connect, rconnect = -1, change, reg_change = 0;
3401 struct snd_soc_dapm_update update = {};
3402 int ret = 0;
3403
3404 val = (ucontrol->value.integer.value[0] & mask);
3405 connect = !!val;
3406
3407 if (invert)
3408 val = max - val;
3409
3410 if (snd_soc_volsw_is_stereo(mc)) {
3411 rval = (ucontrol->value.integer.value[1] & mask);
3412 rconnect = !!rval;
3413 if (invert)
3414 rval = max - rval;
3415 }
3416
3417 snd_soc_dapm_mutex_lock(card);
3418
3419 /* This assumes field width < (bits in unsigned int / 2) */
3420 if (width > sizeof(unsigned int) * 8 / 2)
3421 dev_warn(dapm->dev,
3422 "ASoC: control %s field width limit exceeded\n",
3423 kcontrol->id.name);
3424 change = dapm_kcontrol_set_value(kcontrol, val | (rval << width));
3425
3426 if (reg != SND_SOC_NOPM) {
3427 val = val << shift;
3428 rval = rval << mc->rshift;
3429
3430 reg_change = soc_dapm_test_bits(dapm, reg, mask << shift, val);
3431
3432 if (snd_soc_volsw_is_stereo(mc))
3433 reg_change |= soc_dapm_test_bits(dapm, mc->rreg,
3434 mask << mc->rshift,
3435 rval);
3436 }
3437
3438 if (change || reg_change) {
3439 if (reg_change) {
3440 if (snd_soc_volsw_is_stereo(mc)) {
3441 update.has_second_set = true;
3442 update.reg2 = mc->rreg;
3443 update.mask2 = mask << mc->rshift;
3444 update.val2 = rval;
3445 }
3446 update.kcontrol = kcontrol;
3447 update.reg = reg;
3448 update.mask = mask << shift;
3449 update.val = val;
3450 card->update = &update;
3451 }
3452
3453 ret = soc_dapm_mixer_update_power(card, kcontrol, connect,
3454 rconnect);
3455
3456 card->update = NULL;
3457 }
3458
3459 snd_soc_dapm_mutex_unlock(card);
3460
3461 if (ret > 0)
3462 snd_soc_dpcm_runtime_update(card);
3463
3464 return change;
3465}
3466EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
3467
3468/**
3469 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
3470 * @kcontrol: mixer control
3471 * @ucontrol: control element information
3472 *
3473 * Callback to get the value of a dapm enumerated double mixer control.
3474 *
3475 * Returns 0 for success.
3476 */
3477int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
3478 struct snd_ctl_elem_value *ucontrol)
3479{
3480 struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
3481 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
3482 unsigned int reg_val, val;
3483
3484 snd_soc_dapm_mutex_lock(dapm);
3485 if (e->reg != SND_SOC_NOPM && dapm_kcontrol_is_powered(kcontrol)) {
3486 reg_val = soc_dapm_read(dapm, e->reg);
3487 } else {
3488 reg_val = dapm_kcontrol_get_value(kcontrol);
3489 }
3490 snd_soc_dapm_mutex_unlock(dapm);
3491
3492 val = (reg_val >> e->shift_l) & e->mask;
3493 ucontrol->value.enumerated.item[0] = snd_soc_enum_val_to_item(e, val);
3494 if (e->shift_l != e->shift_r) {
3495 val = (reg_val >> e->shift_r) & e->mask;
3496 val = snd_soc_enum_val_to_item(e, val);
3497 ucontrol->value.enumerated.item[1] = val;
3498 }
3499
3500 return 0;
3501}
3502EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
3503
3504/**
3505 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
3506 * @kcontrol: mixer control
3507 * @ucontrol: control element information
3508 *
3509 * Callback to set the value of a dapm enumerated double mixer control.
3510 *
3511 * Returns 0 for success.
3512 */
3513int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
3514 struct snd_ctl_elem_value *ucontrol)
3515{
3516 struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
3517 struct snd_soc_card *card = dapm->card;
3518 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
3519 unsigned int *item = ucontrol->value.enumerated.item;
3520 unsigned int val, change, reg_change = 0;
3521 unsigned int mask;
3522 struct snd_soc_dapm_update update = {};
3523 int ret = 0;
3524
3525 if (item[0] >= e->items)
3526 return -EINVAL;
3527
3528 val = snd_soc_enum_item_to_val(e, item[0]) << e->shift_l;
3529 mask = e->mask << e->shift_l;
3530 if (e->shift_l != e->shift_r) {
3531 if (item[1] > e->items)
3532 return -EINVAL;
3533 val |= snd_soc_enum_item_to_val(e, item[1]) << e->shift_r;
3534 mask |= e->mask << e->shift_r;
3535 }
3536
3537 snd_soc_dapm_mutex_lock(card);
3538
3539 change = dapm_kcontrol_set_value(kcontrol, val);
3540
3541 if (e->reg != SND_SOC_NOPM)
3542 reg_change = soc_dapm_test_bits(dapm, e->reg, mask, val);
3543
3544 if (change || reg_change) {
3545 if (reg_change) {
3546 update.kcontrol = kcontrol;
3547 update.reg = e->reg;
3548 update.mask = mask;
3549 update.val = val;
3550 card->update = &update;
3551 }
3552
3553 ret = soc_dapm_mux_update_power(card, kcontrol, item[0], e);
3554
3555 card->update = NULL;
3556 }
3557
3558 snd_soc_dapm_mutex_unlock(card);
3559
3560 if (ret > 0)
3561 snd_soc_dpcm_runtime_update(card);
3562
3563 return change;
3564}
3565EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
3566
3567/**
3568 * snd_soc_dapm_info_pin_switch - Info for a pin switch
3569 *
3570 * @kcontrol: mixer control
3571 * @uinfo: control element information
3572 *
3573 * Callback to provide information about a pin switch control.
3574 */
3575int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
3576 struct snd_ctl_elem_info *uinfo)
3577{
3578 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
3579 uinfo->count = 1;
3580 uinfo->value.integer.min = 0;
3581 uinfo->value.integer.max = 1;
3582
3583 return 0;
3584}
3585EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
3586
3587/**
3588 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
3589 *
3590 * @kcontrol: mixer control
3591 * @ucontrol: Value
3592 */
3593int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
3594 struct snd_ctl_elem_value *ucontrol)
3595{
3596 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
3597 const char *pin = (const char *)kcontrol->private_value;
3598
3599 snd_soc_dapm_mutex_lock(card);
3600
3601 ucontrol->value.integer.value[0] =
3602 snd_soc_dapm_get_pin_status(&card->dapm, pin);
3603
3604 snd_soc_dapm_mutex_unlock(card);
3605
3606 return 0;
3607}
3608EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
3609
3610/**
3611 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
3612 *
3613 * @kcontrol: mixer control
3614 * @ucontrol: Value
3615 */
3616int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
3617 struct snd_ctl_elem_value *ucontrol)
3618{
3619 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
3620 const char *pin = (const char *)kcontrol->private_value;
3621 int ret;
3622
3623 snd_soc_dapm_mutex_lock(card);
3624 ret = __snd_soc_dapm_set_pin(&card->dapm, pin,
3625 !!ucontrol->value.integer.value[0]);
3626 snd_soc_dapm_mutex_unlock(card);
3627
3628 snd_soc_dapm_sync(&card->dapm);
3629 return ret;
3630}
3631EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
3632
3633struct snd_soc_dapm_widget *
3634snd_soc_dapm_new_control_unlocked(struct snd_soc_dapm_context *dapm,
3635 const struct snd_soc_dapm_widget *widget)
3636{
3637 enum snd_soc_dapm_direction dir;
3638 struct snd_soc_dapm_widget *w;
3639 int ret = -ENOMEM;
3640
3641 w = dapm_cnew_widget(widget, soc_dapm_prefix(dapm));
3642 if (!w)
3643 goto cnew_failed;
3644
3645 switch (w->id) {
3646 case snd_soc_dapm_regulator_supply:
3647 w->regulator = devm_regulator_get(dapm->dev, widget->name);
3648 if (IS_ERR(w->regulator)) {
3649 ret = PTR_ERR(w->regulator);
3650 goto request_failed;
3651 }
3652
3653 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
3654 ret = regulator_allow_bypass(w->regulator, true);
3655 if (ret != 0)
3656 dev_warn(dapm->dev,
3657 "ASoC: Failed to bypass %s: %d\n",
3658 w->name, ret);
3659 }
3660 break;
3661 case snd_soc_dapm_pinctrl:
3662 w->pinctrl = devm_pinctrl_get(dapm->dev);
3663 if (IS_ERR(w->pinctrl)) {
3664 ret = PTR_ERR(w->pinctrl);
3665 goto request_failed;
3666 }
3667
3668 /* set to sleep_state when initializing */
3669 dapm_pinctrl_event(w, NULL, SND_SOC_DAPM_POST_PMD);
3670 break;
3671 case snd_soc_dapm_clock_supply:
3672 w->clk = devm_clk_get(dapm->dev, widget->name);
3673 if (IS_ERR(w->clk)) {
3674 ret = PTR_ERR(w->clk);
3675 goto request_failed;
3676 }
3677 break;
3678 default:
3679 break;
3680 }
3681
3682 switch (w->id) {
3683 case snd_soc_dapm_mic:
3684 w->is_ep = SND_SOC_DAPM_EP_SOURCE;
3685 w->power_check = dapm_generic_check_power;
3686 break;
3687 case snd_soc_dapm_input:
3688 if (!dapm->card->fully_routed)
3689 w->is_ep = SND_SOC_DAPM_EP_SOURCE;
3690 w->power_check = dapm_generic_check_power;
3691 break;
3692 case snd_soc_dapm_spk:
3693 case snd_soc_dapm_hp:
3694 w->is_ep = SND_SOC_DAPM_EP_SINK;
3695 w->power_check = dapm_generic_check_power;
3696 break;
3697 case snd_soc_dapm_output:
3698 if (!dapm->card->fully_routed)
3699 w->is_ep = SND_SOC_DAPM_EP_SINK;
3700 w->power_check = dapm_generic_check_power;
3701 break;
3702 case snd_soc_dapm_vmid:
3703 case snd_soc_dapm_siggen:
3704 w->is_ep = SND_SOC_DAPM_EP_SOURCE;
3705 w->power_check = dapm_always_on_check_power;
3706 break;
3707 case snd_soc_dapm_sink:
3708 w->is_ep = SND_SOC_DAPM_EP_SINK;
3709 w->power_check = dapm_always_on_check_power;
3710 break;
3711
3712 case snd_soc_dapm_mux:
3713 case snd_soc_dapm_demux:
3714 case snd_soc_dapm_switch:
3715 case snd_soc_dapm_mixer:
3716 case snd_soc_dapm_mixer_named_ctl:
3717 case snd_soc_dapm_adc:
3718 case snd_soc_dapm_aif_out:
3719 case snd_soc_dapm_dac:
3720 case snd_soc_dapm_aif_in:
3721 case snd_soc_dapm_pga:
3722 case snd_soc_dapm_buffer:
3723 case snd_soc_dapm_scheduler:
3724 case snd_soc_dapm_effect:
3725 case snd_soc_dapm_src:
3726 case snd_soc_dapm_asrc:
3727 case snd_soc_dapm_encoder:
3728 case snd_soc_dapm_decoder:
3729 case snd_soc_dapm_out_drv:
3730 case snd_soc_dapm_micbias:
3731 case snd_soc_dapm_line:
3732 case snd_soc_dapm_dai_link:
3733 case snd_soc_dapm_dai_out:
3734 case snd_soc_dapm_dai_in:
3735 w->power_check = dapm_generic_check_power;
3736 break;
3737 case snd_soc_dapm_supply:
3738 case snd_soc_dapm_regulator_supply:
3739 case snd_soc_dapm_pinctrl:
3740 case snd_soc_dapm_clock_supply:
3741 case snd_soc_dapm_kcontrol:
3742 w->is_supply = 1;
3743 w->power_check = dapm_supply_check_power;
3744 break;
3745 default:
3746 w->power_check = dapm_always_on_check_power;
3747 break;
3748 }
3749
3750 w->dapm = dapm;
3751 INIT_LIST_HEAD(&w->list);
3752 INIT_LIST_HEAD(&w->dirty);
3753 /* see for_each_card_widgets */
3754 list_add_tail(&w->list, &dapm->card->widgets);
3755
3756 snd_soc_dapm_for_each_direction(dir) {
3757 INIT_LIST_HEAD(&w->edges[dir]);
3758 w->endpoints[dir] = -1;
3759 }
3760
3761 /* machine layer sets up unconnected pins and insertions */
3762 w->connected = 1;
3763 return w;
3764
3765request_failed:
3766 dev_err_probe(dapm->dev, ret, "ASoC: Failed to request %s\n",
3767 w->name);
3768 kfree_const(w->name);
3769 kfree_const(w->sname);
3770 kfree(w);
3771cnew_failed:
3772 return ERR_PTR(ret);
3773}
3774
3775/**
3776 * snd_soc_dapm_new_control - create new dapm control
3777 * @dapm: DAPM context
3778 * @widget: widget template
3779 *
3780 * Creates new DAPM control based upon a template.
3781 *
3782 * Returns a widget pointer on success or an error pointer on failure
3783 */
3784struct snd_soc_dapm_widget *
3785snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
3786 const struct snd_soc_dapm_widget *widget)
3787{
3788 struct snd_soc_dapm_widget *w;
3789
3790 snd_soc_dapm_mutex_lock(dapm);
3791 w = snd_soc_dapm_new_control_unlocked(dapm, widget);
3792 snd_soc_dapm_mutex_unlock(dapm);
3793
3794 return w;
3795}
3796EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
3797
3798/**
3799 * snd_soc_dapm_new_controls - create new dapm controls
3800 * @dapm: DAPM context
3801 * @widget: widget array
3802 * @num: number of widgets
3803 *
3804 * Creates new DAPM controls based upon the templates.
3805 *
3806 * Returns 0 for success else error.
3807 */
3808int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
3809 const struct snd_soc_dapm_widget *widget,
3810 int num)
3811{
3812 int i;
3813 int ret = 0;
3814
3815 snd_soc_dapm_mutex_lock_root(dapm);
3816 for (i = 0; i < num; i++) {
3817 struct snd_soc_dapm_widget *w = snd_soc_dapm_new_control_unlocked(dapm, widget);
3818 if (IS_ERR(w)) {
3819 ret = PTR_ERR(w);
3820 break;
3821 }
3822 widget++;
3823 }
3824 snd_soc_dapm_mutex_unlock(dapm);
3825 return ret;
3826}
3827EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
3828
3829static int
3830snd_soc_dai_link_event_pre_pmu(struct snd_soc_dapm_widget *w,
3831 struct snd_pcm_substream *substream)
3832{
3833 struct snd_soc_dapm_path *path;
3834 struct snd_soc_dai *source, *sink;
3835 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
3836 struct snd_pcm_hw_params *params = NULL;
3837 const struct snd_soc_pcm_stream *config = NULL;
3838 struct snd_pcm_runtime *runtime = NULL;
3839 unsigned int fmt;
3840 int ret = 0;
3841
3842 /*
3843 * NOTE
3844 *
3845 * snd_pcm_hw_params is quite large (608 bytes on arm64) and is
3846 * starting to get a bit excessive for allocation on the stack,
3847 * especially when you're building with some of the KASAN type
3848 * stuff that increases stack usage.
3849 * So, we use kzalloc()/kfree() for params in this function.
3850 */
3851 params = kzalloc(sizeof(*params), GFP_KERNEL);
3852 if (!params)
3853 return -ENOMEM;
3854
3855 runtime = kzalloc(sizeof(*runtime), GFP_KERNEL);
3856 if (!runtime) {
3857 ret = -ENOMEM;
3858 goto out;
3859 }
3860
3861 substream->runtime = runtime;
3862
3863 substream->stream = SNDRV_PCM_STREAM_CAPTURE;
3864 snd_soc_dapm_widget_for_each_source_path(w, path) {
3865 source = path->source->priv;
3866
3867 ret = snd_soc_dai_startup(source, substream);
3868 if (ret < 0)
3869 goto out;
3870
3871 snd_soc_dai_activate(source, substream->stream);
3872 }
3873
3874 substream->stream = SNDRV_PCM_STREAM_PLAYBACK;
3875 snd_soc_dapm_widget_for_each_sink_path(w, path) {
3876 sink = path->sink->priv;
3877
3878 ret = snd_soc_dai_startup(sink, substream);
3879 if (ret < 0)
3880 goto out;
3881
3882 snd_soc_dai_activate(sink, substream->stream);
3883 }
3884
3885 substream->hw_opened = 1;
3886
3887 /*
3888 * Note: getting the config after .startup() gives a chance to
3889 * either party on the link to alter the configuration if
3890 * necessary
3891 */
3892 config = rtd->dai_link->c2c_params + rtd->c2c_params_select;
3893 if (!config) {
3894 dev_err(w->dapm->dev, "ASoC: link config missing\n");
3895 ret = -EINVAL;
3896 goto out;
3897 }
3898
3899 /* Be a little careful as we don't want to overflow the mask array */
3900 if (!config->formats) {
3901 dev_warn(w->dapm->dev, "ASoC: Invalid format was specified\n");
3902
3903 ret = -EINVAL;
3904 goto out;
3905 }
3906
3907 fmt = ffs(config->formats) - 1;
3908
3909 snd_mask_set(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), fmt);
3910 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->min =
3911 config->rate_min;
3912 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->max =
3913 config->rate_max;
3914 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->min
3915 = config->channels_min;
3916 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->max
3917 = config->channels_max;
3918
3919 substream->stream = SNDRV_PCM_STREAM_CAPTURE;
3920 snd_soc_dapm_widget_for_each_source_path(w, path) {
3921 source = path->source->priv;
3922
3923 ret = snd_soc_dai_hw_params(source, substream, params);
3924 if (ret < 0)
3925 goto out;
3926
3927 dapm_update_dai_unlocked(substream, params, source);
3928 }
3929
3930 substream->stream = SNDRV_PCM_STREAM_PLAYBACK;
3931 snd_soc_dapm_widget_for_each_sink_path(w, path) {
3932 sink = path->sink->priv;
3933
3934 ret = snd_soc_dai_hw_params(sink, substream, params);
3935 if (ret < 0)
3936 goto out;
3937
3938 dapm_update_dai_unlocked(substream, params, sink);
3939 }
3940
3941 runtime->format = params_format(params);
3942 runtime->subformat = params_subformat(params);
3943 runtime->channels = params_channels(params);
3944 runtime->rate = params_rate(params);
3945
3946out:
3947 /* see above NOTE */
3948 kfree(params);
3949
3950 return ret;
3951}
3952
3953static int snd_soc_dai_link_event(struct snd_soc_dapm_widget *w,
3954 struct snd_kcontrol *kcontrol, int event)
3955{
3956 struct snd_soc_dapm_path *path;
3957 struct snd_soc_dai *source, *sink;
3958 struct snd_pcm_substream *substream = w->priv;
3959 int ret = 0, saved_stream = substream->stream;
3960
3961 if (WARN_ON(list_empty(&w->edges[SND_SOC_DAPM_DIR_OUT]) ||
3962 list_empty(&w->edges[SND_SOC_DAPM_DIR_IN])))
3963 return -EINVAL;
3964
3965 switch (event) {
3966 case SND_SOC_DAPM_PRE_PMU:
3967 ret = snd_soc_dai_link_event_pre_pmu(w, substream);
3968 if (ret < 0)
3969 goto out;
3970
3971 break;
3972
3973 case SND_SOC_DAPM_POST_PMU:
3974 snd_soc_dapm_widget_for_each_sink_path(w, path) {
3975 sink = path->sink->priv;
3976
3977 snd_soc_dai_digital_mute(sink, 0, SNDRV_PCM_STREAM_PLAYBACK);
3978 ret = 0;
3979 }
3980 break;
3981
3982 case SND_SOC_DAPM_PRE_PMD:
3983 snd_soc_dapm_widget_for_each_sink_path(w, path) {
3984 sink = path->sink->priv;
3985
3986 snd_soc_dai_digital_mute(sink, 1, SNDRV_PCM_STREAM_PLAYBACK);
3987 ret = 0;
3988 }
3989
3990 substream->stream = SNDRV_PCM_STREAM_CAPTURE;
3991 snd_soc_dapm_widget_for_each_source_path(w, path) {
3992 source = path->source->priv;
3993 snd_soc_dai_hw_free(source, substream, 0);
3994 }
3995
3996 substream->stream = SNDRV_PCM_STREAM_PLAYBACK;
3997 snd_soc_dapm_widget_for_each_sink_path(w, path) {
3998 sink = path->sink->priv;
3999 snd_soc_dai_hw_free(sink, substream, 0);
4000 }
4001
4002 substream->stream = SNDRV_PCM_STREAM_CAPTURE;
4003 snd_soc_dapm_widget_for_each_source_path(w, path) {
4004 source = path->source->priv;
4005 snd_soc_dai_deactivate(source, substream->stream);
4006 snd_soc_dai_shutdown(source, substream, 0);
4007 }
4008
4009 substream->stream = SNDRV_PCM_STREAM_PLAYBACK;
4010 snd_soc_dapm_widget_for_each_sink_path(w, path) {
4011 sink = path->sink->priv;
4012 snd_soc_dai_deactivate(sink, substream->stream);
4013 snd_soc_dai_shutdown(sink, substream, 0);
4014 }
4015 break;
4016
4017 case SND_SOC_DAPM_POST_PMD:
4018 kfree(substream->runtime);
4019 break;
4020
4021 default:
4022 WARN(1, "Unknown event %d\n", event);
4023 ret = -EINVAL;
4024 }
4025
4026out:
4027 /* Restore the substream direction */
4028 substream->stream = saved_stream;
4029 return ret;
4030}
4031
4032static int snd_soc_dapm_dai_link_get(struct snd_kcontrol *kcontrol,
4033 struct snd_ctl_elem_value *ucontrol)
4034{
4035 struct snd_soc_dapm_widget *w = snd_kcontrol_chip(kcontrol);
4036 struct snd_soc_pcm_runtime *rtd = w->priv;
4037
4038 ucontrol->value.enumerated.item[0] = rtd->c2c_params_select;
4039
4040 return 0;
4041}
4042
4043static int snd_soc_dapm_dai_link_put(struct snd_kcontrol *kcontrol,
4044 struct snd_ctl_elem_value *ucontrol)
4045{
4046 struct snd_soc_dapm_widget *w = snd_kcontrol_chip(kcontrol);
4047 struct snd_soc_pcm_runtime *rtd = w->priv;
4048
4049 /* Can't change the config when widget is already powered */
4050 if (w->power)
4051 return -EBUSY;
4052
4053 if (ucontrol->value.enumerated.item[0] == rtd->c2c_params_select)
4054 return 0;
4055
4056 if (ucontrol->value.enumerated.item[0] >= rtd->dai_link->num_c2c_params)
4057 return -EINVAL;
4058
4059 rtd->c2c_params_select = ucontrol->value.enumerated.item[0];
4060
4061 return 1;
4062}
4063
4064static void
4065snd_soc_dapm_free_kcontrol(struct snd_soc_card *card,
4066 unsigned long *private_value,
4067 int num_c2c_params,
4068 const char **w_param_text)
4069{
4070 int count;
4071
4072 devm_kfree(card->dev, (void *)*private_value);
4073
4074 if (!w_param_text)
4075 return;
4076
4077 for (count = 0 ; count < num_c2c_params; count++)
4078 devm_kfree(card->dev, (void *)w_param_text[count]);
4079 devm_kfree(card->dev, w_param_text);
4080}
4081
4082static struct snd_kcontrol_new *
4083snd_soc_dapm_alloc_kcontrol(struct snd_soc_card *card,
4084 char *link_name,
4085 const struct snd_soc_pcm_stream *c2c_params,
4086 int num_c2c_params, const char **w_param_text,
4087 unsigned long *private_value)
4088{
4089 struct soc_enum w_param_enum[] = {
4090 SOC_ENUM_SINGLE(0, 0, 0, NULL),
4091 };
4092 struct snd_kcontrol_new kcontrol_dai_link[] = {
4093 SOC_ENUM_EXT(NULL, w_param_enum[0],
4094 snd_soc_dapm_dai_link_get,
4095 snd_soc_dapm_dai_link_put),
4096 };
4097 struct snd_kcontrol_new *kcontrol_news;
4098 const struct snd_soc_pcm_stream *config = c2c_params;
4099 int count;
4100
4101 for (count = 0 ; count < num_c2c_params; count++) {
4102 if (!config->stream_name) {
4103 dev_warn(card->dapm.dev,
4104 "ASoC: anonymous config %d for dai link %s\n",
4105 count, link_name);
4106 w_param_text[count] =
4107 devm_kasprintf(card->dev, GFP_KERNEL,
4108 "Anonymous Configuration %d",
4109 count);
4110 } else {
4111 w_param_text[count] = devm_kmemdup(card->dev,
4112 config->stream_name,
4113 strlen(config->stream_name) + 1,
4114 GFP_KERNEL);
4115 }
4116 if (!w_param_text[count])
4117 goto outfree_w_param;
4118 config++;
4119 }
4120
4121 w_param_enum[0].items = num_c2c_params;
4122 w_param_enum[0].texts = w_param_text;
4123
4124 *private_value =
4125 (unsigned long) devm_kmemdup(card->dev,
4126 (void *)(kcontrol_dai_link[0].private_value),
4127 sizeof(struct soc_enum), GFP_KERNEL);
4128 if (!*private_value) {
4129 dev_err(card->dev, "ASoC: Failed to create control for %s widget\n",
4130 link_name);
4131 goto outfree_w_param;
4132 }
4133 kcontrol_dai_link[0].private_value = *private_value;
4134 /* duplicate kcontrol_dai_link on heap so that memory persists */
4135 kcontrol_news = devm_kmemdup(card->dev, &kcontrol_dai_link[0],
4136 sizeof(struct snd_kcontrol_new),
4137 GFP_KERNEL);
4138 if (!kcontrol_news) {
4139 dev_err(card->dev, "ASoC: Failed to create control for %s widget\n",
4140 link_name);
4141 goto outfree_w_param;
4142 }
4143 return kcontrol_news;
4144
4145outfree_w_param:
4146 snd_soc_dapm_free_kcontrol(card, private_value, num_c2c_params, w_param_text);
4147 return NULL;
4148}
4149
4150static struct snd_soc_dapm_widget *
4151snd_soc_dapm_new_dai(struct snd_soc_card *card,
4152 struct snd_pcm_substream *substream,
4153 char *id)
4154{
4155 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
4156 struct snd_soc_dapm_widget template;
4157 struct snd_soc_dapm_widget *w;
4158 const struct snd_kcontrol_new *kcontrol_news;
4159 int num_kcontrols;
4160 const char **w_param_text;
4161 unsigned long private_value = 0;
4162 char *link_name;
4163 int ret = -ENOMEM;
4164
4165 link_name = devm_kasprintf(card->dev, GFP_KERNEL, "%s-%s",
4166 rtd->dai_link->name, id);
4167 if (!link_name)
4168 goto name_fail;
4169
4170 /* allocate memory for control, only in case of multiple configs */
4171 w_param_text = NULL;
4172 kcontrol_news = NULL;
4173 num_kcontrols = 0;
4174 if (rtd->dai_link->num_c2c_params > 1) {
4175 w_param_text = devm_kcalloc(card->dev,
4176 rtd->dai_link->num_c2c_params,
4177 sizeof(char *), GFP_KERNEL);
4178 if (!w_param_text)
4179 goto param_fail;
4180
4181 num_kcontrols = 1;
4182 kcontrol_news = snd_soc_dapm_alloc_kcontrol(card, link_name,
4183 rtd->dai_link->c2c_params,
4184 rtd->dai_link->num_c2c_params,
4185 w_param_text, &private_value);
4186 if (!kcontrol_news)
4187 goto param_fail;
4188 }
4189
4190 memset(&template, 0, sizeof(template));
4191 template.reg = SND_SOC_NOPM;
4192 template.id = snd_soc_dapm_dai_link;
4193 template.name = link_name;
4194 template.event = snd_soc_dai_link_event;
4195 template.event_flags = SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
4196 SND_SOC_DAPM_PRE_PMD | SND_SOC_DAPM_POST_PMD;
4197 template.kcontrol_news = kcontrol_news;
4198 template.num_kcontrols = num_kcontrols;
4199
4200 dev_dbg(card->dev, "ASoC: adding %s widget\n", link_name);
4201
4202 w = snd_soc_dapm_new_control_unlocked(&card->dapm, &template);
4203 if (IS_ERR(w)) {
4204 ret = PTR_ERR(w);
4205 goto outfree_kcontrol_news;
4206 }
4207
4208 w->priv = substream;
4209
4210 return w;
4211
4212outfree_kcontrol_news:
4213 devm_kfree(card->dev, (void *)template.kcontrol_news);
4214 snd_soc_dapm_free_kcontrol(card, &private_value,
4215 rtd->dai_link->num_c2c_params, w_param_text);
4216param_fail:
4217 devm_kfree(card->dev, link_name);
4218name_fail:
4219 dev_err(rtd->dev, "ASoC: Failed to create %s-%s widget: %d\n",
4220 rtd->dai_link->name, id, ret);
4221 return ERR_PTR(ret);
4222}
4223
4224/**
4225 * snd_soc_dapm_new_dai_widgets - Create new DAPM widgets
4226 * @dapm: DAPM context
4227 * @dai: parent DAI
4228 *
4229 * Returns 0 on success, error code otherwise.
4230 */
4231int snd_soc_dapm_new_dai_widgets(struct snd_soc_dapm_context *dapm,
4232 struct snd_soc_dai *dai)
4233{
4234 struct snd_soc_dapm_widget template;
4235 struct snd_soc_dapm_widget *w;
4236
4237 WARN_ON(dapm->dev != dai->dev);
4238
4239 memset(&template, 0, sizeof(template));
4240 template.reg = SND_SOC_NOPM;
4241
4242 if (dai->driver->playback.stream_name) {
4243 template.id = snd_soc_dapm_dai_in;
4244 template.name = dai->driver->playback.stream_name;
4245 template.sname = dai->driver->playback.stream_name;
4246
4247 dev_dbg(dai->dev, "ASoC: adding %s widget\n",
4248 template.name);
4249
4250 w = snd_soc_dapm_new_control_unlocked(dapm, &template);
4251 if (IS_ERR(w))
4252 return PTR_ERR(w);
4253
4254 w->priv = dai;
4255 snd_soc_dai_set_widget_playback(dai, w);
4256 }
4257
4258 if (dai->driver->capture.stream_name) {
4259 template.id = snd_soc_dapm_dai_out;
4260 template.name = dai->driver->capture.stream_name;
4261 template.sname = dai->driver->capture.stream_name;
4262
4263 dev_dbg(dai->dev, "ASoC: adding %s widget\n",
4264 template.name);
4265
4266 w = snd_soc_dapm_new_control_unlocked(dapm, &template);
4267 if (IS_ERR(w))
4268 return PTR_ERR(w);
4269
4270 w->priv = dai;
4271 snd_soc_dai_set_widget_capture(dai, w);
4272 }
4273
4274 return 0;
4275}
4276EXPORT_SYMBOL_GPL(snd_soc_dapm_new_dai_widgets);
4277
4278int snd_soc_dapm_link_dai_widgets(struct snd_soc_card *card)
4279{
4280 struct snd_soc_dapm_widget *dai_w, *w;
4281 struct snd_soc_dapm_widget *src, *sink;
4282 struct snd_soc_dai *dai;
4283
4284 /* For each DAI widget... */
4285 for_each_card_widgets(card, dai_w) {
4286 switch (dai_w->id) {
4287 case snd_soc_dapm_dai_in:
4288 case snd_soc_dapm_dai_out:
4289 break;
4290 default:
4291 continue;
4292 }
4293
4294 /* let users know there is no DAI to link */
4295 if (!dai_w->priv) {
4296 dev_dbg(card->dev, "dai widget %s has no DAI\n",
4297 dai_w->name);
4298 continue;
4299 }
4300
4301 dai = dai_w->priv;
4302
4303 /* ...find all widgets with the same stream and link them */
4304 for_each_card_widgets(card, w) {
4305 if (w->dapm != dai_w->dapm)
4306 continue;
4307
4308 switch (w->id) {
4309 case snd_soc_dapm_dai_in:
4310 case snd_soc_dapm_dai_out:
4311 continue;
4312 default:
4313 break;
4314 }
4315
4316 if (!w->sname || !strstr(w->sname, dai_w->sname))
4317 continue;
4318
4319 if (dai_w->id == snd_soc_dapm_dai_in) {
4320 src = dai_w;
4321 sink = w;
4322 } else {
4323 src = w;
4324 sink = dai_w;
4325 }
4326 dev_dbg(dai->dev, "%s -> %s\n", src->name, sink->name);
4327 snd_soc_dapm_add_path(w->dapm, src, sink, NULL, NULL);
4328 }
4329 }
4330
4331 return 0;
4332}
4333
4334static void dapm_connect_dai_routes(struct snd_soc_dapm_context *dapm,
4335 struct snd_soc_dai *src_dai,
4336 struct snd_soc_dapm_widget *src,
4337 struct snd_soc_dapm_widget *dai,
4338 struct snd_soc_dai *sink_dai,
4339 struct snd_soc_dapm_widget *sink)
4340{
4341 dev_dbg(dapm->dev, "connected DAI link %s:%s -> %s:%s\n",
4342 src_dai->component->name, src->name,
4343 sink_dai->component->name, sink->name);
4344
4345 if (dai) {
4346 snd_soc_dapm_add_path(dapm, src, dai, NULL, NULL);
4347 src = dai;
4348 }
4349
4350 snd_soc_dapm_add_path(dapm, src, sink, NULL, NULL);
4351}
4352
4353static void dapm_connect_dai_pair(struct snd_soc_card *card,
4354 struct snd_soc_pcm_runtime *rtd,
4355 struct snd_soc_dai *codec_dai,
4356 struct snd_soc_dai *cpu_dai)
4357{
4358 struct snd_soc_dai_link *dai_link = rtd->dai_link;
4359 struct snd_soc_dapm_widget *codec, *cpu;
4360 struct snd_soc_dai *src_dai[] = { cpu_dai, codec_dai };
4361 struct snd_soc_dai *sink_dai[] = { codec_dai, cpu_dai };
4362 struct snd_soc_dapm_widget **src[] = { &cpu, &codec };
4363 struct snd_soc_dapm_widget **sink[] = { &codec, &cpu };
4364 char *widget_name[] = { "playback", "capture" };
4365 int stream;
4366
4367 for_each_pcm_streams(stream) {
4368 int stream_cpu, stream_codec;
4369
4370 stream_cpu = snd_soc_get_stream_cpu(dai_link, stream);
4371 stream_codec = stream;
4372
4373 /* connect BE DAI playback if widgets are valid */
4374 cpu = snd_soc_dai_get_widget(cpu_dai, stream_cpu);
4375 codec = snd_soc_dai_get_widget(codec_dai, stream_codec);
4376
4377 if (!cpu || !codec)
4378 continue;
4379
4380 /* special handling for [Codec2Codec] */
4381 if (dai_link->c2c_params && !rtd->c2c_widget[stream]) {
4382 struct snd_pcm_substream *substream = rtd->pcm->streams[stream].substream;
4383 struct snd_soc_dapm_widget *dai = snd_soc_dapm_new_dai(card, substream,
4384 widget_name[stream]);
4385
4386 if (IS_ERR(dai))
4387 continue;
4388
4389 rtd->c2c_widget[stream] = dai;
4390 }
4391
4392 dapm_connect_dai_routes(&card->dapm, src_dai[stream], *src[stream],
4393 rtd->c2c_widget[stream],
4394 sink_dai[stream], *sink[stream]);
4395 }
4396}
4397
4398static void soc_dapm_dai_stream_event(struct snd_soc_dai *dai, int stream,
4399 int event)
4400{
4401 struct snd_soc_dapm_widget *w;
4402
4403 w = snd_soc_dai_get_widget(dai, stream);
4404
4405 if (w) {
4406 unsigned int ep;
4407
4408 dapm_mark_dirty(w, "stream event");
4409
4410 if (w->id == snd_soc_dapm_dai_in) {
4411 ep = SND_SOC_DAPM_EP_SOURCE;
4412 dapm_widget_invalidate_input_paths(w);
4413 } else {
4414 ep = SND_SOC_DAPM_EP_SINK;
4415 dapm_widget_invalidate_output_paths(w);
4416 }
4417
4418 switch (event) {
4419 case SND_SOC_DAPM_STREAM_START:
4420 w->active = 1;
4421 w->is_ep = ep;
4422 break;
4423 case SND_SOC_DAPM_STREAM_STOP:
4424 w->active = 0;
4425 w->is_ep = 0;
4426 break;
4427 case SND_SOC_DAPM_STREAM_SUSPEND:
4428 case SND_SOC_DAPM_STREAM_RESUME:
4429 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
4430 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
4431 break;
4432 }
4433 }
4434}
4435
4436void snd_soc_dapm_connect_dai_link_widgets(struct snd_soc_card *card)
4437{
4438 struct snd_soc_pcm_runtime *rtd;
4439 struct snd_soc_dai *cpu_dai;
4440 struct snd_soc_dai *codec_dai;
4441
4442 /* for each BE DAI link... */
4443 for_each_card_rtds(card, rtd) {
4444 struct snd_soc_dai_link_ch_map *ch_maps;
4445 int i;
4446
4447 /*
4448 * dynamic FE links have no fixed DAI mapping.
4449 * CODEC<->CODEC links have no direct connection.
4450 */
4451 if (rtd->dai_link->dynamic)
4452 continue;
4453
4454 /*
4455 * see
4456 * soc.h :: [dai_link->ch_maps Image sample]
4457 */
4458 for_each_rtd_ch_maps(rtd, i, ch_maps) {
4459 cpu_dai = snd_soc_rtd_to_cpu(rtd, ch_maps->cpu);
4460 codec_dai = snd_soc_rtd_to_codec(rtd, ch_maps->codec);
4461
4462 dapm_connect_dai_pair(card, rtd, codec_dai, cpu_dai);
4463 }
4464 }
4465}
4466
4467static void soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
4468 int event)
4469{
4470 struct snd_soc_dai *dai;
4471 int i;
4472
4473 for_each_rtd_dais(rtd, i, dai)
4474 soc_dapm_dai_stream_event(dai, stream, event);
4475
4476 dapm_power_widgets(rtd->card, event);
4477}
4478
4479/**
4480 * snd_soc_dapm_stream_event - send a stream event to the dapm core
4481 * @rtd: PCM runtime data
4482 * @stream: stream name
4483 * @event: stream event
4484 *
4485 * Sends a stream event to the dapm core. The core then makes any
4486 * necessary widget power changes.
4487 *
4488 * Returns 0 for success else error.
4489 */
4490void snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
4491 int event)
4492{
4493 struct snd_soc_card *card = rtd->card;
4494
4495 snd_soc_dapm_mutex_lock(card);
4496 soc_dapm_stream_event(rtd, stream, event);
4497 snd_soc_dapm_mutex_unlock(card);
4498}
4499
4500void snd_soc_dapm_stream_stop(struct snd_soc_pcm_runtime *rtd, int stream)
4501{
4502 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
4503 if (snd_soc_runtime_ignore_pmdown_time(rtd)) {
4504 /* powered down playback stream now */
4505 snd_soc_dapm_stream_event(rtd,
4506 SNDRV_PCM_STREAM_PLAYBACK,
4507 SND_SOC_DAPM_STREAM_STOP);
4508 } else {
4509 /* start delayed pop wq here for playback streams */
4510 rtd->pop_wait = 1;
4511 queue_delayed_work(system_power_efficient_wq,
4512 &rtd->delayed_work,
4513 msecs_to_jiffies(rtd->pmdown_time));
4514 }
4515 } else {
4516 /* capture streams can be powered down now */
4517 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
4518 SND_SOC_DAPM_STREAM_STOP);
4519 }
4520}
4521EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_stop);
4522
4523/**
4524 * snd_soc_dapm_enable_pin_unlocked - enable pin.
4525 * @dapm: DAPM context
4526 * @pin: pin name
4527 *
4528 * Enables input/output pin and its parents or children widgets iff there is
4529 * a valid audio route and active audio stream.
4530 *
4531 * Requires external locking.
4532 *
4533 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4534 * do any widget power switching.
4535 */
4536int snd_soc_dapm_enable_pin_unlocked(struct snd_soc_dapm_context *dapm,
4537 const char *pin)
4538{
4539 return snd_soc_dapm_set_pin(dapm, pin, 1);
4540}
4541EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin_unlocked);
4542
4543/**
4544 * snd_soc_dapm_enable_pin - enable pin.
4545 * @dapm: DAPM context
4546 * @pin: pin name
4547 *
4548 * Enables input/output pin and its parents or children widgets iff there is
4549 * a valid audio route and active audio stream.
4550 *
4551 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4552 * do any widget power switching.
4553 */
4554int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
4555{
4556 int ret;
4557
4558 snd_soc_dapm_mutex_lock(dapm);
4559
4560 ret = snd_soc_dapm_set_pin(dapm, pin, 1);
4561
4562 snd_soc_dapm_mutex_unlock(dapm);
4563
4564 return ret;
4565}
4566EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
4567
4568/**
4569 * snd_soc_dapm_force_enable_pin_unlocked - force a pin to be enabled
4570 * @dapm: DAPM context
4571 * @pin: pin name
4572 *
4573 * Enables input/output pin regardless of any other state. This is
4574 * intended for use with microphone bias supplies used in microphone
4575 * jack detection.
4576 *
4577 * Requires external locking.
4578 *
4579 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4580 * do any widget power switching.
4581 */
4582int snd_soc_dapm_force_enable_pin_unlocked(struct snd_soc_dapm_context *dapm,
4583 const char *pin)
4584{
4585 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
4586
4587 if (!w) {
4588 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
4589 return -EINVAL;
4590 }
4591
4592 dev_dbg(w->dapm->dev, "ASoC: force enable pin %s\n", pin);
4593 if (!w->connected) {
4594 /*
4595 * w->force does not affect the number of input or output paths,
4596 * so we only have to recheck if w->connected is changed
4597 */
4598 dapm_widget_invalidate_input_paths(w);
4599 dapm_widget_invalidate_output_paths(w);
4600 w->connected = 1;
4601 }
4602 w->force = 1;
4603 dapm_mark_dirty(w, "force enable");
4604
4605 return 0;
4606}
4607EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin_unlocked);
4608
4609/**
4610 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
4611 * @dapm: DAPM context
4612 * @pin: pin name
4613 *
4614 * Enables input/output pin regardless of any other state. This is
4615 * intended for use with microphone bias supplies used in microphone
4616 * jack detection.
4617 *
4618 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4619 * do any widget power switching.
4620 */
4621int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
4622 const char *pin)
4623{
4624 int ret;
4625
4626 snd_soc_dapm_mutex_lock(dapm);
4627
4628 ret = snd_soc_dapm_force_enable_pin_unlocked(dapm, pin);
4629
4630 snd_soc_dapm_mutex_unlock(dapm);
4631
4632 return ret;
4633}
4634EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
4635
4636/**
4637 * snd_soc_dapm_disable_pin_unlocked - disable pin.
4638 * @dapm: DAPM context
4639 * @pin: pin name
4640 *
4641 * Disables input/output pin and its parents or children widgets.
4642 *
4643 * Requires external locking.
4644 *
4645 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4646 * do any widget power switching.
4647 */
4648int snd_soc_dapm_disable_pin_unlocked(struct snd_soc_dapm_context *dapm,
4649 const char *pin)
4650{
4651 return snd_soc_dapm_set_pin(dapm, pin, 0);
4652}
4653EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin_unlocked);
4654
4655/**
4656 * snd_soc_dapm_disable_pin - disable pin.
4657 * @dapm: DAPM context
4658 * @pin: pin name
4659 *
4660 * Disables input/output pin and its parents or children widgets.
4661 *
4662 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4663 * do any widget power switching.
4664 */
4665int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
4666 const char *pin)
4667{
4668 int ret;
4669
4670 snd_soc_dapm_mutex_lock(dapm);
4671
4672 ret = snd_soc_dapm_set_pin(dapm, pin, 0);
4673
4674 snd_soc_dapm_mutex_unlock(dapm);
4675
4676 return ret;
4677}
4678EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
4679
4680/**
4681 * snd_soc_dapm_nc_pin_unlocked - permanently disable pin.
4682 * @dapm: DAPM context
4683 * @pin: pin name
4684 *
4685 * Marks the specified pin as being not connected, disabling it along
4686 * any parent or child widgets. At present this is identical to
4687 * snd_soc_dapm_disable_pin() but in future it will be extended to do
4688 * additional things such as disabling controls which only affect
4689 * paths through the pin.
4690 *
4691 * Requires external locking.
4692 *
4693 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4694 * do any widget power switching.
4695 */
4696int snd_soc_dapm_nc_pin_unlocked(struct snd_soc_dapm_context *dapm,
4697 const char *pin)
4698{
4699 return snd_soc_dapm_set_pin(dapm, pin, 0);
4700}
4701EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin_unlocked);
4702
4703/**
4704 * snd_soc_dapm_nc_pin - permanently disable pin.
4705 * @dapm: DAPM context
4706 * @pin: pin name
4707 *
4708 * Marks the specified pin as being not connected, disabling it along
4709 * any parent or child widgets. At present this is identical to
4710 * snd_soc_dapm_disable_pin() but in future it will be extended to do
4711 * additional things such as disabling controls which only affect
4712 * paths through the pin.
4713 *
4714 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
4715 * do any widget power switching.
4716 */
4717int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
4718{
4719 int ret;
4720
4721 snd_soc_dapm_mutex_lock(dapm);
4722
4723 ret = snd_soc_dapm_set_pin(dapm, pin, 0);
4724
4725 snd_soc_dapm_mutex_unlock(dapm);
4726
4727 return ret;
4728}
4729EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
4730
4731/**
4732 * snd_soc_dapm_get_pin_status - get audio pin status
4733 * @dapm: DAPM context
4734 * @pin: audio signal pin endpoint (or start point)
4735 *
4736 * Get audio pin status - connected or disconnected.
4737 *
4738 * Returns 1 for connected otherwise 0.
4739 */
4740int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
4741 const char *pin)
4742{
4743 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
4744
4745 if (w)
4746 return w->connected;
4747
4748 return 0;
4749}
4750EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
4751
4752/**
4753 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
4754 * @dapm: DAPM context
4755 * @pin: audio signal pin endpoint (or start point)
4756 *
4757 * Mark the given endpoint or pin as ignoring suspend. When the
4758 * system is disabled a path between two endpoints flagged as ignoring
4759 * suspend will not be disabled. The path must already be enabled via
4760 * normal means at suspend time, it will not be turned on if it was not
4761 * already enabled.
4762 */
4763int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
4764 const char *pin)
4765{
4766 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
4767
4768 if (!w) {
4769 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
4770 return -EINVAL;
4771 }
4772
4773 w->ignore_suspend = 1;
4774
4775 return 0;
4776}
4777EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
4778
4779/**
4780 * snd_soc_dapm_free - free dapm resources
4781 * @dapm: DAPM context
4782 *
4783 * Free all dapm widgets and resources.
4784 */
4785void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
4786{
4787 dapm_debugfs_cleanup(dapm);
4788 dapm_free_widgets(dapm);
4789 list_del(&dapm->list);
4790}
4791EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
4792
4793void snd_soc_dapm_init(struct snd_soc_dapm_context *dapm,
4794 struct snd_soc_card *card,
4795 struct snd_soc_component *component)
4796{
4797 dapm->card = card;
4798 dapm->component = component;
4799 dapm->bias_level = SND_SOC_BIAS_OFF;
4800
4801 if (component) {
4802 dapm->dev = component->dev;
4803 dapm->idle_bias_off = !component->driver->idle_bias_on;
4804 dapm->suspend_bias_off = component->driver->suspend_bias_off;
4805 } else {
4806 dapm->dev = card->dev;
4807 }
4808
4809 INIT_LIST_HEAD(&dapm->list);
4810 /* see for_each_card_dapms */
4811 list_add(&dapm->list, &card->dapm_list);
4812}
4813EXPORT_SYMBOL_GPL(snd_soc_dapm_init);
4814
4815static void soc_dapm_shutdown_dapm(struct snd_soc_dapm_context *dapm)
4816{
4817 struct snd_soc_card *card = dapm->card;
4818 struct snd_soc_dapm_widget *w;
4819 LIST_HEAD(down_list);
4820 int powerdown = 0;
4821
4822 snd_soc_dapm_mutex_lock_root(card);
4823
4824 for_each_card_widgets(dapm->card, w) {
4825 if (w->dapm != dapm)
4826 continue;
4827 if (w->power) {
4828 dapm_seq_insert(w, &down_list, false);
4829 w->new_power = 0;
4830 powerdown = 1;
4831 }
4832 }
4833
4834 /* If there were no widgets to power down we're already in
4835 * standby.
4836 */
4837 if (powerdown) {
4838 if (dapm->bias_level == SND_SOC_BIAS_ON)
4839 snd_soc_dapm_set_bias_level(dapm,
4840 SND_SOC_BIAS_PREPARE);
4841 dapm_seq_run(card, &down_list, 0, false);
4842 if (dapm->bias_level == SND_SOC_BIAS_PREPARE)
4843 snd_soc_dapm_set_bias_level(dapm,
4844 SND_SOC_BIAS_STANDBY);
4845 }
4846
4847 snd_soc_dapm_mutex_unlock(card);
4848}
4849
4850/*
4851 * snd_soc_dapm_shutdown - callback for system shutdown
4852 */
4853void snd_soc_dapm_shutdown(struct snd_soc_card *card)
4854{
4855 struct snd_soc_dapm_context *dapm;
4856
4857 for_each_card_dapms(card, dapm) {
4858 if (dapm != &card->dapm) {
4859 soc_dapm_shutdown_dapm(dapm);
4860 if (dapm->bias_level == SND_SOC_BIAS_STANDBY)
4861 snd_soc_dapm_set_bias_level(dapm,
4862 SND_SOC_BIAS_OFF);
4863 }
4864 }
4865
4866 soc_dapm_shutdown_dapm(&card->dapm);
4867 if (card->dapm.bias_level == SND_SOC_BIAS_STANDBY)
4868 snd_soc_dapm_set_bias_level(&card->dapm,
4869 SND_SOC_BIAS_OFF);
4870}
4871
4872/* Module information */
4873MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
4874MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
4875MODULE_LICENSE("GPL");