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ASoC: compress: Prevent multicodec for compressed stream
[deliverable/linux.git] / sound / soc / soc-dapm.c
CommitLineData
2b97eabc
RP		 1/*
2 * soc-dapm.c -- ALSA SoC Dynamic Audio Power Management
3 *
4 * Copyright 2005 Wolfson Microelectronics PLC.
d331124d 5 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
2b97eabc
RP		 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 *
2b97eabc
RP		 12 * Features:
13 * o Changes power status of internal codec blocks depending on the
14 * dynamic configuration of codec internal audio paths and active
74b8f955 15 * DACs/ADCs.
2b97eabc 16 * o Platform power domain - can support external components i.e. amps and
612a3fec 17 * mic/headphone insertion events.
2b97eabc
RP		 18 * o Automatic Mic Bias support
19 * o Jack insertion power event initiation - e.g. hp insertion will enable
20 * sinks, dacs, etc
612a3fec 21 * o Delayed power down of audio subsystem to reduce pops between a quick
2b97eabc
RP		 22 * device reopen.
23 *
2b97eabc
RP		 24 */
25
26#include <linux/module.h>
27#include <linux/moduleparam.h>
28#include <linux/init.h>
9d0624a7 29#include <linux/async.h>
2b97eabc
RP		 30#include <linux/delay.h>
31#include <linux/pm.h>
32#include <linux/bitops.h>
33#include <linux/platform_device.h>
34#include <linux/jiffies.h>
20496ff3 35#include <linux/debugfs.h>
f1aac484 36#include <linux/pm_runtime.h>
62ea874a 37#include <linux/regulator/consumer.h>
d7e7eb91 38#include <linux/clk.h>
5a0e3ad6 39#include <linux/slab.h>
2b97eabc
RP		 40#include <sound/core.h>
41#include <sound/pcm.h>
42#include <sound/pcm_params.h>
ce6120cc 43#include <sound/soc.h>
2b97eabc
RP		 44#include <sound/initval.h>
45
84e90930
MB		 46#include <trace/events/asoc.h>
47
de02d078
MB		 48#define DAPM_UPDATE_STAT(widget, val) widget->dapm->card->dapm_stats.val++;
49
57295073
LPC		 50static int snd_soc_dapm_add_path(struct snd_soc_dapm_context *dapm,
51 struct snd_soc_dapm_widget *wsource, struct snd_soc_dapm_widget *wsink,
52 const char *control,
53 int (*connected)(struct snd_soc_dapm_widget *source,
54 struct snd_soc_dapm_widget *sink));
55static struct snd_soc_dapm_widget *
56snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
57 const struct snd_soc_dapm_widget *widget);
58
2b97eabc
RP		 59/* dapm power sequences - make this per codec in the future */
60static int dapm_up_seq[] = {
38357ab2 61 [snd_soc_dapm_pre] = 0,
62ea874a 62 [snd_soc_dapm_regulator_supply] = 1,
d7e7eb91 63 [snd_soc_dapm_clock_supply] = 1,
1dd275b6
MB		 64 [snd_soc_dapm_supply] = 2,
65 [snd_soc_dapm_micbias] = 3,
c74184ed 66 [snd_soc_dapm_dai_link] = 2,
1dd275b6
MB		 67 [snd_soc_dapm_dai_in] = 4,
68 [snd_soc_dapm_dai_out] = 4,
69 [snd_soc_dapm_aif_in] = 4,
70 [snd_soc_dapm_aif_out] = 4,
71 [snd_soc_dapm_mic] = 5,
72 [snd_soc_dapm_mux] = 6,
1dd275b6
MB		 73 [snd_soc_dapm_dac] = 7,
74 [snd_soc_dapm_switch] = 8,
75 [snd_soc_dapm_mixer] = 8,
76 [snd_soc_dapm_mixer_named_ctl] = 8,
77 [snd_soc_dapm_pga] = 9,
78 [snd_soc_dapm_adc] = 10,
79 [snd_soc_dapm_out_drv] = 11,
80 [snd_soc_dapm_hp] = 11,
81 [snd_soc_dapm_spk] = 11,
82 [snd_soc_dapm_line] = 11,
83 [snd_soc_dapm_kcontrol] = 12,
84 [snd_soc_dapm_post] = 13,
2b97eabc 85};
ca9c1aae 86
2b97eabc 87static int dapm_down_seq[] = {
38357ab2 88 [snd_soc_dapm_pre] = 0,
57295073
LPC		 89 [snd_soc_dapm_kcontrol] = 1,
90 [snd_soc_dapm_adc] = 2,
91 [snd_soc_dapm_hp] = 3,
92 [snd_soc_dapm_spk] = 3,
93 [snd_soc_dapm_line] = 3,
94 [snd_soc_dapm_out_drv] = 3,
38357ab2 95 [snd_soc_dapm_pga] = 4,
efc77e36 96 [snd_soc_dapm_switch] = 5,
38357ab2 97 [snd_soc_dapm_mixer_named_ctl] = 5,
e3d4dabd
MB		 98 [snd_soc_dapm_mixer] = 5,
99 [snd_soc_dapm_dac] = 6,
100 [snd_soc_dapm_mic] = 7,
101 [snd_soc_dapm_micbias] = 8,
102 [snd_soc_dapm_mux] = 9,
010ff262
MB		 103 [snd_soc_dapm_aif_in] = 10,
104 [snd_soc_dapm_aif_out] = 10,
4616274d
MB		 105 [snd_soc_dapm_dai_in] = 10,
106 [snd_soc_dapm_dai_out] = 10,
c74184ed 107 [snd_soc_dapm_dai_link] = 11,
c74184ed 108 [snd_soc_dapm_supply] = 12,
1dd275b6
MB		 109 [snd_soc_dapm_clock_supply] = 13,
110 [snd_soc_dapm_regulator_supply] = 13,
111 [snd_soc_dapm_post] = 14,
2b97eabc
RP		 112};
113
f9fa2b18
MB		 114static void dapm_assert_locked(struct snd_soc_dapm_context *dapm)
115{
116 if (dapm->card && dapm->card->instantiated)
117 lockdep_assert_held(&dapm->card->dapm_mutex);
118}
119
12ef193d 120static void pop_wait(u32 pop_time)
15e4c72f
MB		 121{
122 if (pop_time)
123 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
124}
125
fd8d3bc0 126static void pop_dbg(struct device *dev, u32 pop_time, const char *fmt, ...)
15e4c72f
MB		 127{
128 va_list args;
fd8d3bc0 129 char *buf;
15e4c72f 130
fd8d3bc0
JN		 131 if (!pop_time)
132 return;
15e4c72f 133
fd8d3bc0
JN		 134 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
135 if (buf == NULL)
136 return;
15e4c72f 137
fd8d3bc0
JN		 138 va_start(args, fmt);
139 vsnprintf(buf, PAGE_SIZE, fmt, args);
9d01df06 140 dev_info(dev, "%s", buf);
15e4c72f 141 va_end(args);
fd8d3bc0
JN		 142
143 kfree(buf);
15e4c72f
MB		 144}
145
db432b41
MB		 146static bool dapm_dirty_widget(struct snd_soc_dapm_widget *w)
147{
148 return !list_empty(&w->dirty);
149}
150
492c0a18 151static void dapm_mark_dirty(struct snd_soc_dapm_widget *w, const char *reason)
db432b41 152{
f9fa2b18
MB		 153 dapm_assert_locked(w->dapm);
154
75c1f891
MB		 155 if (!dapm_dirty_widget(w)) {
156 dev_vdbg(w->dapm->dev, "Marking %s dirty due to %s\n",
157 w->name, reason);
db432b41 158 list_add_tail(&w->dirty, &w->dapm->card->dapm_dirty);
75c1f891 159 }
db432b41
MB		 160}
161
e2d32ff6
MB		 162void dapm_mark_io_dirty(struct snd_soc_dapm_context *dapm)
163{
164 struct snd_soc_card *card = dapm->card;
165 struct snd_soc_dapm_widget *w;
166
167 mutex_lock(&card->dapm_mutex);
168
169 list_for_each_entry(w, &card->widgets, list) {
170 switch (w->id) {
171 case snd_soc_dapm_input:
172 case snd_soc_dapm_output:
173 dapm_mark_dirty(w, "Rechecking inputs and outputs");
174 break;
175 default:
176 break;
177 }
178 }
179
180 mutex_unlock(&card->dapm_mutex);
181}
182EXPORT_SYMBOL_GPL(dapm_mark_io_dirty);
183
2b97eabc 184/* create a new dapm widget */
88cb4290 185static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
2b97eabc
RP		 186 const struct snd_soc_dapm_widget *_widget)
187{
88cb4290 188 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
2b97eabc
RP		 189}
190
e84357f7 191struct dapm_kcontrol_data {
cf7c1de2 192 unsigned int value;
57295073 193 struct snd_soc_dapm_widget *widget;
5106b92f 194 struct list_head paths;
2c75bdf3 195 struct snd_soc_dapm_widget_list *wlist;
e84357f7
LPC		 196};
197
198static int dapm_kcontrol_data_alloc(struct snd_soc_dapm_widget *widget,
199 struct snd_kcontrol *kcontrol)
200{
201 struct dapm_kcontrol_data *data;
57295073 202 struct soc_mixer_control *mc;
e84357f7 203
2c75bdf3 204 data = kzalloc(sizeof(*data), GFP_KERNEL);
e84357f7
LPC		 205 if (!data) {
206 dev_err(widget->dapm->dev,
207 "ASoC: can't allocate kcontrol data for %s\n",
208 widget->name);
209 return -ENOMEM;
210 }
211
5106b92f 212 INIT_LIST_HEAD(&data->paths);
e84357f7 213
57295073
LPC		 214 switch (widget->id) {
215 case snd_soc_dapm_switch:
216 case snd_soc_dapm_mixer:
217 case snd_soc_dapm_mixer_named_ctl:
218 mc = (struct soc_mixer_control *)kcontrol->private_value;
219
220 if (mc->autodisable) {
221 struct snd_soc_dapm_widget template;
222
223 memset(&template, 0, sizeof(template));
224 template.reg = mc->reg;
225 template.mask = (1 << fls(mc->max)) - 1;
226 template.shift = mc->shift;
227 if (mc->invert)
228 template.off_val = mc->max;
229 else
230 template.off_val = 0;
231 template.on_val = template.off_val;
232 template.id = snd_soc_dapm_kcontrol;
233 template.name = kcontrol->id.name;
234
2daabd78
LPC		 235 data->value = template.on_val;
236
57295073
LPC		 237 data->widget = snd_soc_dapm_new_control(widget->dapm,
238 &template);
239 if (!data->widget) {
240 kfree(data);
241 return -ENOMEM;
242 }
243 }
244 break;
245 default:
246 break;
247 }
248
e84357f7
LPC		 249 kcontrol->private_data = data;
250
251 return 0;
252}
253
254static void dapm_kcontrol_free(struct snd_kcontrol *kctl)
255{
256 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kctl);
2c75bdf3 257 kfree(data->wlist);
e84357f7
LPC		 258 kfree(data);
259}
260
261static struct snd_soc_dapm_widget_list *dapm_kcontrol_get_wlist(
262 const struct snd_kcontrol *kcontrol)
263{
264 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
265
2c75bdf3 266 return data->wlist;
e84357f7
LPC		 267}
268
269static int dapm_kcontrol_add_widget(struct snd_kcontrol *kcontrol,
270 struct snd_soc_dapm_widget *widget)
271{
272 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
2c75bdf3
LPC		 273 struct snd_soc_dapm_widget_list *new_wlist;
274 unsigned int n;
e84357f7 275
2c75bdf3
LPC		 276 if (data->wlist)
277 n = data->wlist->num_widgets + 1;
278 else
279 n = 1;
280
281 new_wlist = krealloc(data->wlist,
282 sizeof(*new_wlist) + sizeof(widget) * n, GFP_KERNEL);
283 if (!new_wlist)
e84357f7
LPC		 284 return -ENOMEM;
285
2c75bdf3
LPC		 286 new_wlist->widgets[n - 1] = widget;
287 new_wlist->num_widgets = n;
e84357f7 288
2c75bdf3 289 data->wlist = new_wlist;
e84357f7
LPC		 290
291 return 0;
292}
293
5106b92f
LPC		 294static void dapm_kcontrol_add_path(const struct snd_kcontrol *kcontrol,
295 struct snd_soc_dapm_path *path)
296{
297 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
298
299 list_add_tail(&path->list_kcontrol, &data->paths);
57295073
LPC		 300
301 if (data->widget) {
302 snd_soc_dapm_add_path(data->widget->dapm, data->widget,
303 path->source, NULL, NULL);
304 }
305}
306
307static bool dapm_kcontrol_is_powered(const struct snd_kcontrol *kcontrol)
308{
309 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
310
311 if (!data->widget)
312 return true;
313
314 return data->widget->power;
5106b92f
LPC		 315}
316
317static struct list_head *dapm_kcontrol_get_path_list(
318 const struct snd_kcontrol *kcontrol)
319{
320 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
321
322 return &data->paths;
323}
324
325#define dapm_kcontrol_for_each_path(path, kcontrol) \
326 list_for_each_entry(path, dapm_kcontrol_get_path_list(kcontrol), \
327 list_kcontrol)
328
cf7c1de2
LPC		 329static unsigned int dapm_kcontrol_get_value(const struct snd_kcontrol *kcontrol)
330{
331 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
332
333 return data->value;
334}
335
336static bool dapm_kcontrol_set_value(const struct snd_kcontrol *kcontrol,
337 unsigned int value)
338{
339 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
340
341 if (data->value == value)
342 return false;
343
57295073
LPC		 344 if (data->widget)
345 data->widget->on_val = value;
346
cf7c1de2
LPC		 347 data->value = value;
348
349 return true;
350}
351
ce0fc93a
LPC		 352/**
353 * snd_soc_dapm_kcontrol_dapm() - Returns the dapm context associated to a
354 * kcontrol
355 * @kcontrol: The kcontrol
356 *
357 * Note: This function must only be used on kcontrols that are known to have
358 * been registered for a CODEC. Otherwise the behaviour is undefined.
359 */
360struct snd_soc_dapm_context *snd_soc_dapm_kcontrol_dapm(
361 struct snd_kcontrol *kcontrol)
362{
363 return dapm_kcontrol_get_wlist(kcontrol)->widgets[0]->dapm;
364}
365EXPORT_SYMBOL_GPL(snd_soc_dapm_kcontrol_dapm);
366
eee5d7f9
LPC		 367/**
368 * snd_soc_dapm_kcontrol_codec() - Returns the codec associated to a kcontrol
369 * @kcontrol: The kcontrol
370 */
371struct snd_soc_codec *snd_soc_dapm_kcontrol_codec(struct snd_kcontrol *kcontrol)
372{
ce0fc93a 373 return snd_soc_dapm_to_codec(snd_soc_dapm_kcontrol_dapm(kcontrol));
eee5d7f9
LPC		 374}
375EXPORT_SYMBOL_GPL(snd_soc_dapm_kcontrol_codec);
376
6c120e19
LG		 377static void dapm_reset(struct snd_soc_card *card)
378{
379 struct snd_soc_dapm_widget *w;
380
f9fa2b18
MB		 381 lockdep_assert_held(&card->dapm_mutex);
382
6c120e19
LG		 383 memset(&card->dapm_stats, 0, sizeof(card->dapm_stats));
384
385 list_for_each_entry(w, &card->widgets, list) {
39eb5fd1 386 w->new_power = w->power;
6c120e19
LG		 387 w->power_checked = false;
388 w->inputs = -1;
389 w->outputs = -1;
390 }
391}
392
94f99c87
LPC		 393static const char *soc_dapm_prefix(struct snd_soc_dapm_context *dapm)
394{
395 if (!dapm->component)
396 return NULL;
397 return dapm->component->name_prefix;
398}
399
ce0fc93a 400static int soc_dapm_read(struct snd_soc_dapm_context *dapm, int reg,
f7d3c170 401 unsigned int *value)
0445bdf4 402{
ce0fc93a 403 if (!dapm->component)
e2c330b9 404 return -EIO;
ce0fc93a 405 return snd_soc_component_read(dapm->component, reg, value);
49575fb5
LG		 406}
407
ce0fc93a 408static int soc_dapm_update_bits(struct snd_soc_dapm_context *dapm,
e2c330b9 409 int reg, unsigned int mask, unsigned int value)
49575fb5 410{
ce0fc93a 411 if (!dapm->component)
e2c330b9 412 return -EIO;
ce0fc93a 413 return snd_soc_component_update_bits_async(dapm->component, reg,
e2c330b9 414 mask, value);
49575fb5
LG		 415}
416
ce0fc93a
LPC		 417static int soc_dapm_test_bits(struct snd_soc_dapm_context *dapm,
418 int reg, unsigned int mask, unsigned int value)
419{
420 if (!dapm->component)
421 return -EIO;
422 return snd_soc_component_test_bits(dapm->component, reg, mask, value);
423}
424
eb270e98
MB		 425static void soc_dapm_async_complete(struct snd_soc_dapm_context *dapm)
426{
e2c330b9
LPC		 427 if (dapm->component)
428 snd_soc_component_async_complete(dapm->component);
0445bdf4
LG		 429}
430
452c5eaa
MB		 431/**
432 * snd_soc_dapm_set_bias_level - set the bias level for the system
ed5a4c47 433 * @dapm: DAPM context
452c5eaa
MB		 434 * @level: level to configure
435 *
436 * Configure the bias (power) levels for the SoC audio device.
437 *
438 * Returns 0 for success else error.
439 */
ed5a4c47 440static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm,
ce6120cc 441 enum snd_soc_bias_level level)
452c5eaa 442{
ed5a4c47 443 struct snd_soc_card *card = dapm->card;
452c5eaa
MB		 444 int ret = 0;
445
84e90930
MB		 446 trace_snd_soc_bias_level_start(card, level);
447
f0fba2ad 448 if (card && card->set_bias_level)
d4c6005f 449 ret = card->set_bias_level(card, dapm, level);
171ec6b0
MB		 450 if (ret != 0)
451 goto out;
452
68f831c2
LPC		 453 if (dapm->set_bias_level)
454 ret = dapm->set_bias_level(dapm, level);
455 else if (!card || dapm != &card->dapm)
4123128e
LG		 456 dapm->bias_level = level;
457
171ec6b0
MB		 458 if (ret != 0)
459 goto out;
460
461 if (card && card->set_bias_level_post)
d4c6005f 462 ret = card->set_bias_level_post(card, dapm, level);
171ec6b0 463out:
84e90930
MB		 464 trace_snd_soc_bias_level_done(card, level);
465
452c5eaa
MB		 466 return ret;
467}
468
74b8f955 469/* connect mux widget to its interconnecting audio paths */
ce6120cc 470static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
2b97eabc
RP		 471 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
472 struct snd_soc_dapm_path *path, const char *control_name,
473 const struct snd_kcontrol_new *kcontrol)
2b97eabc 474{
2b97eabc 475 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
234c0b8f 476 unsigned int val, item;
2b97eabc 477 int i;
24ff33ac 478
234c0b8f 479 if (e->reg != SND_SOC_NOPM) {
ce0fc93a 480 soc_dapm_read(dapm, e->reg, &val);
234c0b8f
LPC		 481 val = (val >> e->shift_l) & e->mask;
482 item = snd_soc_enum_val_to_item(e, val);
483 } else {
24ff33ac
DP		 484 /* since a virtual mux has no backing registers to
485 * decide which path to connect, it will try to match
486 * with the first enumeration. This is to ensure
487 * that the default mux choice (the first) will be
488 * correctly powered up during initialization.
489 */
234c0b8f 490 item = 0;
24ff33ac 491 }
2e72f8e3 492
9a8d38db 493 for (i = 0; i < e->items; i++) {
2b97eabc 494 if (!(strcmp(control_name, e->texts[i]))) {
8ddab3f5 495 list_add(&path->list, &dapm->card->paths);
2b97eabc
RP		 496 list_add(&path->list_sink, &dest->sources);
497 list_add(&path->list_source, &src->sinks);
498 path->name = (char*)e->texts[i];
234c0b8f
LPC		 499 if (i == item)
500 path->connect = 1;
501 else
502 path->connect = 0;
2b97eabc
RP		 503 return 0;
504 }
505 }
506
507 return -ENODEV;
508}
509
234c0b8f
LPC		 510/* set up initial codec paths */
511static void dapm_set_mixer_path_status(struct snd_soc_dapm_widget *w,
512 struct snd_soc_dapm_path *p, int i)
513{
514 struct soc_mixer_control *mc = (struct soc_mixer_control *)
515 w->kcontrol_news[i].private_value;
516 unsigned int reg = mc->reg;
517 unsigned int shift = mc->shift;
518 unsigned int max = mc->max;
519 unsigned int mask = (1 << fls(max)) - 1;
520 unsigned int invert = mc->invert;
521 unsigned int val;
522
523 if (reg != SND_SOC_NOPM) {
ce0fc93a 524 soc_dapm_read(w->dapm, reg, &val);
234c0b8f
LPC		 525 val = (val >> shift) & mask;
526 if (invert)
527 val = max - val;
528 p->connect = !!val;
529 } else {
530 p->connect = 0;
531 }
532}
533
74b8f955 534/* connect mixer widget to its interconnecting audio paths */
ce6120cc 535static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
2b97eabc
RP		 536 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
537 struct snd_soc_dapm_path *path, const char *control_name)
538{
539 int i;
540
541 /* search for mixer kcontrol */
542 for (i = 0; i < dest->num_kcontrols; i++) {
82cfecdc 543 if (!strcmp(control_name, dest->kcontrol_news[i].name)) {
8ddab3f5 544 list_add(&path->list, &dapm->card->paths);
2b97eabc
RP		 545 list_add(&path->list_sink, &dest->sources);
546 list_add(&path->list_source, &src->sinks);
82cfecdc 547 path->name = dest->kcontrol_news[i].name;
234c0b8f 548 dapm_set_mixer_path_status(dest, path, i);
2b97eabc
RP		 549 return 0;
550 }
551 }
552 return -ENODEV;
553}
554
af46800b 555static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm,
1007da06 556 struct snd_soc_dapm_widget *kcontrolw,
af46800b
SW		 557 const struct snd_kcontrol_new *kcontrol_new,
558 struct snd_kcontrol **kcontrol)
559{
560 struct snd_soc_dapm_widget *w;
561 int i;
562
563 *kcontrol = NULL;
564
565 list_for_each_entry(w, &dapm->card->widgets, list) {
1007da06
SW		 566 if (w == kcontrolw || w->dapm != kcontrolw->dapm)
567 continue;
af46800b
SW		 568 for (i = 0; i < w->num_kcontrols; i++) {
569 if (&w->kcontrol_news[i] == kcontrol_new) {
570 if (w->kcontrols)
571 *kcontrol = w->kcontrols[i];
572 return 1;
573 }
574 }
575 }
576
577 return 0;
578}
579
85762e71
SW		 580/*
581 * Determine if a kcontrol is shared. If it is, look it up. If it isn't,
582 * create it. Either way, add the widget into the control's widget list
583 */
584static int dapm_create_or_share_mixmux_kcontrol(struct snd_soc_dapm_widget *w,
946d92a1 585 int kci)
2b97eabc 586{
4b80b8c2 587 struct snd_soc_dapm_context *dapm = w->dapm;
12ea2c78 588 struct snd_card *card = dapm->card->snd_card;
efb7ac3f 589 const char *prefix;
85762e71
SW		 590 size_t prefix_len;
591 int shared;
592 struct snd_kcontrol *kcontrol;
85762e71 593 bool wname_in_long_name, kcname_in_long_name;
85762e71
SW		 594 char *long_name;
595 const char *name;
596 int ret;
efb7ac3f 597
94f99c87 598 prefix = soc_dapm_prefix(dapm);
3e5ff4df
MB		 599 if (prefix)
600 prefix_len = strlen(prefix) + 1;
601 else
602 prefix_len = 0;
603
85762e71
SW		 604 shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[kci],
605 &kcontrol);
2b97eabc 606
85762e71
SW		 607 if (!kcontrol) {
608 if (shared) {
609 wname_in_long_name = false;
610 kcname_in_long_name = true;
611 } else {
612 switch (w->id) {
613 case snd_soc_dapm_switch:
614 case snd_soc_dapm_mixer:
615 wname_in_long_name = true;
616 kcname_in_long_name = true;
617 break;
618 case snd_soc_dapm_mixer_named_ctl:
619 wname_in_long_name = false;
620 kcname_in_long_name = true;
621 break;
622 case snd_soc_dapm_mux:
85762e71
SW		 623 wname_in_long_name = true;
624 kcname_in_long_name = false;
625 break;
626 default:
85762e71 627 return -EINVAL;
82cd8764 628 }
85762e71
SW		 629 }
630
631 if (wname_in_long_name && kcname_in_long_name) {
85762e71
SW		 632 /*
633 * The control will get a prefix from the control
634 * creation process but we're also using the same
635 * prefix for widgets so cut the prefix off the
636 * front of the widget name.
ca9c1aae 637 */
2b581074 638 long_name = kasprintf(GFP_KERNEL, "%s %s",
85762e71
SW		 639 w->name + prefix_len,
640 w->kcontrol_news[kci].name);
e84357f7 641 if (long_name == NULL)
2b581074 642 return -ENOMEM;
85762e71
SW		 643
644 name = long_name;
645 } else if (wname_in_long_name) {
646 long_name = NULL;
647 name = w->name + prefix_len;
648 } else {
649 long_name = NULL;
650 name = w->kcontrol_news[kci].name;
651 }
ca9c1aae 652
e84357f7 653 kcontrol = snd_soc_cnew(&w->kcontrol_news[kci], NULL, name,
85762e71 654 prefix);
656ca9d3 655 kfree(long_name);
9356e9d5
LPC		 656 if (!kcontrol)
657 return -ENOMEM;
658 kcontrol->private_free = dapm_kcontrol_free;
e84357f7
LPC		 659
660 ret = dapm_kcontrol_data_alloc(w, kcontrol);
661 if (ret) {
662 snd_ctl_free_one(kcontrol);
663 return ret;
664 }
665
85762e71
SW		 666 ret = snd_ctl_add(card, kcontrol);
667 if (ret < 0) {
668 dev_err(dapm->dev,
669 "ASoC: failed to add widget %s dapm kcontrol %s: %d\n",
670 w->name, name, ret);
85762e71
SW		 671 return ret;
672 }
85762e71 673 }
2b97eabc 674
2c75bdf3
LPC		 675 ret = dapm_kcontrol_add_widget(kcontrol, w);
676 if (ret)
677 return ret;
678
85762e71 679 w->kcontrols[kci] = kcontrol;
ca9c1aae 680
85762e71
SW		 681 return 0;
682}
219b93f5 683
85762e71
SW		 684/* create new dapm mixer control */
685static int dapm_new_mixer(struct snd_soc_dapm_widget *w)
686{
687 int i, ret;
688 struct snd_soc_dapm_path *path;
689
690 /* add kcontrol */
691 for (i = 0; i < w->num_kcontrols; i++) {
692 /* match name */
693 list_for_each_entry(path, &w->sources, list_sink) {
694 /* mixer/mux paths name must match control name */
695 if (path->name != (char *)w->kcontrol_news[i].name)
696 continue;
697
698 if (w->kcontrols[i]) {
5106b92f 699 dapm_kcontrol_add_path(w->kcontrols[i], path);
85762e71 700 continue;
2b97eabc 701 }
85762e71 702
946d92a1 703 ret = dapm_create_or_share_mixmux_kcontrol(w, i);
85762e71
SW		 704 if (ret < 0)
705 return ret;
946d92a1
MB		 706
707 dapm_kcontrol_add_path(w->kcontrols[i], path);
2b97eabc
RP		 708 }
709 }
85762e71
SW		 710
711 return 0;
2b97eabc
RP		 712}
713
714/* create new dapm mux control */
4b80b8c2 715static int dapm_new_mux(struct snd_soc_dapm_widget *w)
2b97eabc 716{
4b80b8c2 717 struct snd_soc_dapm_context *dapm = w->dapm;
85762e71 718 struct snd_soc_dapm_path *path;
af46800b 719 int ret;
2b97eabc 720
af46800b
SW		 721 if (w->num_kcontrols != 1) {
722 dev_err(dapm->dev,
30a6a1a4 723 "ASoC: mux %s has incorrect number of controls\n",
af46800b 724 w->name);
2b97eabc
RP		 725 return -EINVAL;
726 }
727
fe581391 728 if (list_empty(&w->sources)) {
85762e71
SW		 729 dev_err(dapm->dev, "ASoC: mux %s has no paths\n", w->name);
730 return -EINVAL;
af46800b 731 }
ce6120cc 732
946d92a1 733 ret = dapm_create_or_share_mixmux_kcontrol(w, 0);
85762e71
SW		 734 if (ret < 0)
735 return ret;
fad59888 736
2b97eabc 737 list_for_each_entry(path, &w->sources, list_sink)
5106b92f 738 dapm_kcontrol_add_path(w->kcontrols[0], path);
2b97eabc 739
af46800b 740 return 0;
2b97eabc
RP		 741}
742
743/* create new dapm volume control */
4b80b8c2 744static int dapm_new_pga(struct snd_soc_dapm_widget *w)
2b97eabc 745{
a6c65736 746 if (w->num_kcontrols)
f7d41ae8 747 dev_err(w->dapm->dev,
30a6a1a4 748 "ASoC: PGA controls not supported: '%s'\n", w->name);
2b97eabc 749
a6c65736 750 return 0;
2b97eabc
RP		 751}
752
753/* reset 'walked' bit for each dapm path */
1059ecfa
RT		 754static void dapm_clear_walk_output(struct snd_soc_dapm_context *dapm,
755 struct list_head *sink)
2b97eabc
RP		 756{
757 struct snd_soc_dapm_path *p;
758
1059ecfa
RT		 759 list_for_each_entry(p, sink, list_source) {
760 if (p->walked) {
761 p->walked = 0;
762 dapm_clear_walk_output(dapm, &p->sink->sinks);
763 }
764 }
2b97eabc
RP		 765}
766
1059ecfa
RT		 767static void dapm_clear_walk_input(struct snd_soc_dapm_context *dapm,
768 struct list_head *source)
2b97eabc
RP		 769{
770 struct snd_soc_dapm_path *p;
771
1059ecfa
RT		 772 list_for_each_entry(p, source, list_sink) {
773 if (p->walked) {
774 p->walked = 0;
775 dapm_clear_walk_input(dapm, &p->source->sources);
776 }
777 }
2b97eabc
RP		 778}
779
1059ecfa 780
9949788b
MB		 781/* We implement power down on suspend by checking the power state of
782 * the ALSA card - when we are suspending the ALSA state for the card
783 * is set to D3.
784 */
785static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
786{
12ea2c78 787 int level = snd_power_get_state(widget->dapm->card->snd_card);
9949788b 788
f0fba2ad 789 switch (level) {
9949788b
MB		 790 case SNDRV_CTL_POWER_D3hot:
791 case SNDRV_CTL_POWER_D3cold:
1547aba9 792 if (widget->ignore_suspend)
30a6a1a4 793 dev_dbg(widget->dapm->dev, "ASoC: %s ignoring suspend\n",
f7d41ae8 794 widget->name);
1547aba9 795 return widget->ignore_suspend;
9949788b
MB		 796 default:
797 return 1;
798 }
799}
800
ec2e3031
LG		 801/* add widget to list if it's not already in the list */
802static int dapm_list_add_widget(struct snd_soc_dapm_widget_list **list,
803 struct snd_soc_dapm_widget *w)
804{
805 struct snd_soc_dapm_widget_list *wlist;
806 int wlistsize, wlistentries, i;
807
808 if (*list == NULL)
809 return -EINVAL;
810
811 wlist = *list;
812
813 /* is this widget already in the list */
814 for (i = 0; i < wlist->num_widgets; i++) {
815 if (wlist->widgets[i] == w)
816 return 0;
817 }
818
819 /* allocate some new space */
820 wlistentries = wlist->num_widgets + 1;
821 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
822 wlistentries * sizeof(struct snd_soc_dapm_widget *);
823 *list = krealloc(wlist, wlistsize, GFP_KERNEL);
824 if (*list == NULL) {
30a6a1a4 825 dev_err(w->dapm->dev, "ASoC: can't allocate widget list for %s\n",
ec2e3031
LG		 826 w->name);
827 return -ENOMEM;
828 }
829 wlist = *list;
830
831 /* insert the widget */
30a6a1a4 832 dev_dbg(w->dapm->dev, "ASoC: added %s in widget list pos %d\n",
ec2e3031
LG		 833 w->name, wlist->num_widgets);
834
835 wlist->widgets[wlist->num_widgets] = w;
836 wlist->num_widgets++;
837 return 1;
838}
839
2b97eabc
RP		 840/*
841 * Recursively check for a completed path to an active or physically connected
842 * output widget. Returns number of complete paths.
843 */
ec2e3031
LG		 844static int is_connected_output_ep(struct snd_soc_dapm_widget *widget,
845 struct snd_soc_dapm_widget_list **list)
2b97eabc
RP		 846{
847 struct snd_soc_dapm_path *path;
848 int con = 0;
849
024dc078
MB		 850 if (widget->outputs >= 0)
851 return widget->outputs;
852
de02d078
MB		 853 DAPM_UPDATE_STAT(widget, path_checks);
854
62ea874a
MB		 855 switch (widget->id) {
856 case snd_soc_dapm_supply:
857 case snd_soc_dapm_regulator_supply:
d7e7eb91 858 case snd_soc_dapm_clock_supply:
57295073 859 case snd_soc_dapm_kcontrol:
246d0a17 860 return 0;
62ea874a
MB		 861 default:
862 break;
863 }
246d0a17 864
010ff262
MB		 865 switch (widget->id) {
866 case snd_soc_dapm_adc:
867 case snd_soc_dapm_aif_out:
4616274d 868 case snd_soc_dapm_dai_out:
024dc078
MB		 869 if (widget->active) {
870 widget->outputs = snd_soc_dapm_suspend_check(widget);
871 return widget->outputs;
872 }
010ff262
MB		 873 default:
874 break;
875 }
2b97eabc
RP		 876
877 if (widget->connected) {
878 /* connected pin ? */
024dc078
MB		 879 if (widget->id == snd_soc_dapm_output && !widget->ext) {
880 widget->outputs = snd_soc_dapm_suspend_check(widget);
881 return widget->outputs;
882 }
2b97eabc
RP		 883
884 /* connected jack or spk ? */
024dc078
MB		 885 if (widget->id == snd_soc_dapm_hp ||
886 widget->id == snd_soc_dapm_spk ||
887 (widget->id == snd_soc_dapm_line &&
888 !list_empty(&widget->sources))) {
889 widget->outputs = snd_soc_dapm_suspend_check(widget);
890 return widget->outputs;
891 }
2b97eabc
RP		 892 }
893
894 list_for_each_entry(path, &widget->sinks, list_source) {
e56235e0
MB		 895 DAPM_UPDATE_STAT(widget, neighbour_checks);
896
bf3a9e13
MB		 897 if (path->weak)
898 continue;
899
8af294b4
MB		 900 if (path->walking)
901 return 1;
902
2b97eabc
RP		 903 if (path->walked)
904 continue;
905
ec2e3031
LG		 906 trace_snd_soc_dapm_output_path(widget, path);
907
2b97eabc
RP		 908 if (path->sink && path->connect) {
909 path->walked = 1;
8af294b4 910 path->walking = 1;
ec2e3031
LG		 911
912 /* do we need to add this widget to the list ? */
913 if (list) {
914 int err;
915 err = dapm_list_add_widget(list, path->sink);
916 if (err < 0) {
30a6a1a4
LG		 917 dev_err(widget->dapm->dev,
918 "ASoC: could not add widget %s\n",
ec2e3031 919 widget->name);
8af294b4 920 path->walking = 0;
ec2e3031
LG		 921 return con;
922 }
923 }
924
925 con += is_connected_output_ep(path->sink, list);
8af294b4
MB		 926
927 path->walking = 0;
2b97eabc
RP		 928 }
929 }
930
024dc078
MB		 931 widget->outputs = con;
932
2b97eabc
RP		 933 return con;
934}
935
936/*
937 * Recursively check for a completed path to an active or physically connected
938 * input widget. Returns number of complete paths.
939 */
ec2e3031
LG		 940static int is_connected_input_ep(struct snd_soc_dapm_widget *widget,
941 struct snd_soc_dapm_widget_list **list)
2b97eabc
RP		 942{
943 struct snd_soc_dapm_path *path;
944 int con = 0;
945
024dc078
MB		 946 if (widget->inputs >= 0)
947 return widget->inputs;
948
de02d078
MB		 949 DAPM_UPDATE_STAT(widget, path_checks);
950
62ea874a
MB		 951 switch (widget->id) {
952 case snd_soc_dapm_supply:
953 case snd_soc_dapm_regulator_supply:
d7e7eb91 954 case snd_soc_dapm_clock_supply:
57295073 955 case snd_soc_dapm_kcontrol:
246d0a17 956 return 0;
62ea874a
MB		 957 default:
958 break;
959 }
246d0a17 960
2b97eabc 961 /* active stream ? */
010ff262
MB		 962 switch (widget->id) {
963 case snd_soc_dapm_dac:
964 case snd_soc_dapm_aif_in:
4616274d 965 case snd_soc_dapm_dai_in:
024dc078
MB		 966 if (widget->active) {
967 widget->inputs = snd_soc_dapm_suspend_check(widget);
968 return widget->inputs;
969 }
010ff262
MB		 970 default:
971 break;
972 }
2b97eabc
RP		 973
974 if (widget->connected) {
975 /* connected pin ? */
024dc078
MB		 976 if (widget->id == snd_soc_dapm_input && !widget->ext) {
977 widget->inputs = snd_soc_dapm_suspend_check(widget);
978 return widget->inputs;
979 }
2b97eabc
RP		 980
981 /* connected VMID/Bias for lower pops */
024dc078
MB		 982 if (widget->id == snd_soc_dapm_vmid) {
983 widget->inputs = snd_soc_dapm_suspend_check(widget);
984 return widget->inputs;
985 }
2b97eabc
RP		 986
987 /* connected jack ? */
eaeae5d9 988 if (widget->id == snd_soc_dapm_mic ||
024dc078
MB		 989 (widget->id == snd_soc_dapm_line &&
990 !list_empty(&widget->sinks))) {
991 widget->inputs = snd_soc_dapm_suspend_check(widget);
992 return widget->inputs;
993 }
994
1ab97c8c
MB		 995 /* signal generator */
996 if (widget->id == snd_soc_dapm_siggen) {
997 widget->inputs = snd_soc_dapm_suspend_check(widget);
998 return widget->inputs;
999 }
2b97eabc
RP		 1000 }
1001
1002 list_for_each_entry(path, &widget->sources, list_sink) {
e56235e0
MB		 1003 DAPM_UPDATE_STAT(widget, neighbour_checks);
1004
bf3a9e13
MB		 1005 if (path->weak)
1006 continue;
1007
8af294b4
MB		 1008 if (path->walking)
1009 return 1;
1010
2b97eabc
RP		 1011 if (path->walked)
1012 continue;
1013
ec2e3031
LG		 1014 trace_snd_soc_dapm_input_path(widget, path);
1015
2b97eabc
RP		 1016 if (path->source && path->connect) {
1017 path->walked = 1;
8af294b4 1018 path->walking = 1;
ec2e3031
LG		 1019
1020 /* do we need to add this widget to the list ? */
1021 if (list) {
1022 int err;
90c6ce0d 1023 err = dapm_list_add_widget(list, path->source);
ec2e3031 1024 if (err < 0) {
30a6a1a4
LG		 1025 dev_err(widget->dapm->dev,
1026 "ASoC: could not add widget %s\n",
ec2e3031 1027 widget->name);
8af294b4 1028 path->walking = 0;
ec2e3031
LG		 1029 return con;
1030 }
1031 }
1032
1033 con += is_connected_input_ep(path->source, list);
8af294b4
MB		 1034
1035 path->walking = 0;
2b97eabc
RP		 1036 }
1037 }
1038
024dc078
MB		 1039 widget->inputs = con;
1040
2b97eabc
RP		 1041 return con;
1042}
1043
ec2e3031
LG		 1044/**
1045 * snd_soc_dapm_get_connected_widgets - query audio path and it's widgets.
1046 * @dai: the soc DAI.
1047 * @stream: stream direction.
1048 * @list: list of active widgets for this stream.
1049 *
1050 * Queries DAPM graph as to whether an valid audio stream path exists for
1051 * the initial stream specified by name. This takes into account
1052 * current mixer and mux kcontrol settings. Creates list of valid widgets.
1053 *
1054 * Returns the number of valid paths or negative error.
1055 */
1056int snd_soc_dapm_dai_get_connected_widgets(struct snd_soc_dai *dai, int stream,
1057 struct snd_soc_dapm_widget_list **list)
1058{
1059 struct snd_soc_card *card = dai->card;
1060 int paths;
1061
1062 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
1063 dapm_reset(card);
1064
1059ecfa 1065 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
ec2e3031 1066 paths = is_connected_output_ep(dai->playback_widget, list);
1059ecfa
RT		 1067 dapm_clear_walk_output(&card->dapm,
1068 &dai->playback_widget->sinks);
1069 } else {
d298caae 1070 paths = is_connected_input_ep(dai->capture_widget, list);
1059ecfa
RT		 1071 dapm_clear_walk_input(&card->dapm,
1072 &dai->capture_widget->sources);
1073 }
ec2e3031
LG		 1074
1075 trace_snd_soc_dapm_connected(paths, stream);
ec2e3031
LG		 1076 mutex_unlock(&card->dapm_mutex);
1077
1078 return paths;
1079}
1080
62ea874a
MB		 1081/*
1082 * Handler for regulator supply widget.
1083 */
1084int dapm_regulator_event(struct snd_soc_dapm_widget *w,
1085 struct snd_kcontrol *kcontrol, int event)
1086{
c05b84d1
MB		 1087 int ret;
1088
eb270e98
MB		 1089 soc_dapm_async_complete(w->dapm);
1090
c05b84d1 1091 if (SND_SOC_DAPM_EVENT_ON(event)) {
de9ba98b 1092 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
8784c77a 1093 ret = regulator_allow_bypass(w->regulator, false);
c05b84d1
MB		 1094 if (ret != 0)
1095 dev_warn(w->dapm->dev,
30686c35 1096 "ASoC: Failed to unbypass %s: %d\n",
c05b84d1
MB		 1097 w->name, ret);
1098 }
1099
a3cc056b 1100 return regulator_enable(w->regulator);
c05b84d1 1101 } else {
de9ba98b 1102 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
8784c77a 1103 ret = regulator_allow_bypass(w->regulator, true);
c05b84d1
MB		 1104 if (ret != 0)
1105 dev_warn(w->dapm->dev,
30686c35 1106 "ASoC: Failed to bypass %s: %d\n",
c05b84d1
MB		 1107 w->name, ret);
1108 }
1109
a3cc056b 1110 return regulator_disable_deferred(w->regulator, w->shift);
c05b84d1 1111 }
62ea874a
MB		 1112}
1113EXPORT_SYMBOL_GPL(dapm_regulator_event);
1114
d7e7eb91
OL		 1115/*
1116 * Handler for clock supply widget.
1117 */
1118int dapm_clock_event(struct snd_soc_dapm_widget *w,
1119 struct snd_kcontrol *kcontrol, int event)
1120{
1121 if (!w->clk)
1122 return -EIO;
1123
eb270e98
MB		 1124 soc_dapm_async_complete(w->dapm);
1125
ec02995a 1126#ifdef CONFIG_HAVE_CLK
d7e7eb91 1127 if (SND_SOC_DAPM_EVENT_ON(event)) {
37c1b927 1128 return clk_prepare_enable(w->clk);
d7e7eb91 1129 } else {
37c1b927 1130 clk_disable_unprepare(w->clk);
d7e7eb91
OL		 1131 return 0;
1132 }
ec02995a 1133#endif
98b3cf12 1134 return 0;
d7e7eb91
OL		 1135}
1136EXPORT_SYMBOL_GPL(dapm_clock_event);
1137
d805002b
MB		 1138static int dapm_widget_power_check(struct snd_soc_dapm_widget *w)
1139{
9b8a83b2
MB		 1140 if (w->power_checked)
1141 return w->new_power;
1142
d805002b 1143 if (w->force)
9b8a83b2 1144 w->new_power = 1;
d805002b 1145 else
9b8a83b2
MB		 1146 w->new_power = w->power_check(w);
1147
1148 w->power_checked = true;
1149
1150 return w->new_power;
d805002b
MB		 1151}
1152
cd0f2d47
MB		 1153/* Generic check to see if a widget should be powered.
1154 */
1155static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
1156{
1157 int in, out;
1158
de02d078
MB		 1159 DAPM_UPDATE_STAT(w, power_checks);
1160
ec2e3031 1161 in = is_connected_input_ep(w, NULL);
1059ecfa 1162 dapm_clear_walk_input(w->dapm, &w->sources);
ec2e3031 1163 out = is_connected_output_ep(w, NULL);
1059ecfa 1164 dapm_clear_walk_output(w->dapm, &w->sinks);
cd0f2d47
MB		 1165 return out != 0 && in != 0;
1166}
1167
6ea31b9f
MB		 1168/* Check to see if an ADC has power */
1169static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
1170{
1171 int in;
1172
de02d078
MB		 1173 DAPM_UPDATE_STAT(w, power_checks);
1174
6ea31b9f 1175 if (w->active) {
ec2e3031 1176 in = is_connected_input_ep(w, NULL);
1059ecfa 1177 dapm_clear_walk_input(w->dapm, &w->sources);
6ea31b9f
MB		 1178 return in != 0;
1179 } else {
1180 return dapm_generic_check_power(w);
1181 }
1182}
1183
1184/* Check to see if a DAC has power */
1185static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
1186{
1187 int out;
1188
de02d078
MB		 1189 DAPM_UPDATE_STAT(w, power_checks);
1190
6ea31b9f 1191 if (w->active) {
ec2e3031 1192 out = is_connected_output_ep(w, NULL);
1059ecfa 1193 dapm_clear_walk_output(w->dapm, &w->sinks);
6ea31b9f
MB		 1194 return out != 0;
1195 } else {
1196 return dapm_generic_check_power(w);
1197 }
1198}
1199
246d0a17
MB		 1200/* Check to see if a power supply is needed */
1201static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
1202{
1203 struct snd_soc_dapm_path *path;
246d0a17 1204
de02d078
MB		 1205 DAPM_UPDATE_STAT(w, power_checks);
1206
246d0a17
MB		 1207 /* Check if one of our outputs is connected */
1208 list_for_each_entry(path, &w->sinks, list_source) {
a8fdac83
MB		 1209 DAPM_UPDATE_STAT(w, neighbour_checks);
1210
bf3a9e13
MB		 1211 if (path->weak)
1212 continue;
1213
215edda3
MB		 1214 if (path->connected &&
1215 !path->connected(path->source, path->sink))
1216 continue;
1217
3017358a
MB		 1218 if (!path->sink)
1219 continue;
1220
f68d7e16
MB		 1221 if (dapm_widget_power_check(path->sink))
1222 return 1;
246d0a17
MB		 1223 }
1224
f68d7e16 1225 return 0;
246d0a17
MB		 1226}
1227
35c64bca
MB		 1228static int dapm_always_on_check_power(struct snd_soc_dapm_widget *w)
1229{
1230 return 1;
1231}
1232
38357ab2
MB		 1233static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
1234 struct snd_soc_dapm_widget *b,
828a842f 1235 bool power_up)
42aa3418 1236{
828a842f
MB		 1237 int *sort;
1238
1239 if (power_up)
1240 sort = dapm_up_seq;
1241 else
1242 sort = dapm_down_seq;
1243
38357ab2
MB		 1244 if (sort[a->id] != sort[b->id])
1245 return sort[a->id] - sort[b->id];
20e4859d
MB		 1246 if (a->subseq != b->subseq) {
1247 if (power_up)
1248 return a->subseq - b->subseq;
1249 else
1250 return b->subseq - a->subseq;
1251 }
b22ead2a
MB		 1252 if (a->reg != b->reg)
1253 return a->reg - b->reg;
84dab567
MB		 1254 if (a->dapm != b->dapm)
1255 return (unsigned long)a->dapm - (unsigned long)b->dapm;
42aa3418 1256
38357ab2
MB		 1257 return 0;
1258}
42aa3418 1259
38357ab2
MB		 1260/* Insert a widget in order into a DAPM power sequence. */
1261static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
1262 struct list_head *list,
828a842f 1263 bool power_up)
38357ab2
MB		 1264{
1265 struct snd_soc_dapm_widget *w;
1266
1267 list_for_each_entry(w, list, power_list)
828a842f 1268 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
38357ab2
MB		 1269 list_add_tail(&new_widget->power_list, &w->power_list);
1270 return;
1271 }
1272
1273 list_add_tail(&new_widget->power_list, list);
1274}
1275
95dd5cd6 1276static void dapm_seq_check_event(struct snd_soc_card *card,
68f89ad8
MB		 1277 struct snd_soc_dapm_widget *w, int event)
1278{
68f89ad8
MB		 1279 const char *ev_name;
1280 int power, ret;
1281
1282 switch (event) {
1283 case SND_SOC_DAPM_PRE_PMU:
1284 ev_name = "PRE_PMU";
1285 power = 1;
1286 break;
1287 case SND_SOC_DAPM_POST_PMU:
1288 ev_name = "POST_PMU";
1289 power = 1;
1290 break;
1291 case SND_SOC_DAPM_PRE_PMD:
1292 ev_name = "PRE_PMD";
1293 power = 0;
1294 break;
1295 case SND_SOC_DAPM_POST_PMD:
1296 ev_name = "POST_PMD";
1297 power = 0;
1298 break;
80114129
MB		 1299 case SND_SOC_DAPM_WILL_PMU:
1300 ev_name = "WILL_PMU";
1301 power = 1;
1302 break;
1303 case SND_SOC_DAPM_WILL_PMD:
1304 ev_name = "WILL_PMD";
1305 power = 0;
1306 break;
68f89ad8 1307 default:
a6ed0608 1308 WARN(1, "Unknown event %d\n", event);
68f89ad8
MB		 1309 return;
1310 }
1311
39eb5fd1 1312 if (w->new_power != power)
68f89ad8
MB		 1313 return;
1314
1315 if (w->event && (w->event_flags & event)) {
95dd5cd6 1316 pop_dbg(w->dapm->dev, card->pop_time, "pop test : %s %s\n",
68f89ad8 1317 w->name, ev_name);
eb270e98 1318 soc_dapm_async_complete(w->dapm);
84e90930 1319 trace_snd_soc_dapm_widget_event_start(w, event);
68f89ad8 1320 ret = w->event(w, NULL, event);
84e90930 1321 trace_snd_soc_dapm_widget_event_done(w, event);
68f89ad8 1322 if (ret < 0)
95dd5cd6 1323 dev_err(w->dapm->dev, "ASoC: %s: %s event failed: %d\n",
68f89ad8
MB		 1324 ev_name, w->name, ret);
1325 }
1326}
1327
b22ead2a 1328/* Apply the coalesced changes from a DAPM sequence */
95dd5cd6 1329static void dapm_seq_run_coalesced(struct snd_soc_card *card,
b22ead2a 1330 struct list_head *pending)
163cac06 1331{
ce0fc93a 1332 struct snd_soc_dapm_context *dapm;
68f89ad8 1333 struct snd_soc_dapm_widget *w;
de9ba98b 1334 int reg;
b22ead2a
MB		 1335 unsigned int value = 0;
1336 unsigned int mask = 0;
b22ead2a 1337
ce0fc93a
LPC		 1338 w = list_first_entry(pending, struct snd_soc_dapm_widget, power_list);
1339 reg = w->reg;
1340 dapm = w->dapm;
b22ead2a
MB		 1341
1342 list_for_each_entry(w, pending, power_list) {
ce0fc93a 1343 WARN_ON(reg != w->reg || dapm != w->dapm);
39eb5fd1 1344 w->power = w->new_power;
b22ead2a 1345
de9ba98b
LPC		 1346 mask |= w->mask << w->shift;
1347 if (w->power)
1348 value |= w->on_val << w->shift;
b22ead2a 1349 else
de9ba98b 1350 value |= w->off_val << w->shift;
b22ead2a 1351
ce0fc93a 1352 pop_dbg(dapm->dev, card->pop_time,
b22ead2a
MB		 1353 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
1354 w->name, reg, value, mask);
81628103 1355
68f89ad8 1356 /* Check for events */
95dd5cd6
LPC		 1357 dapm_seq_check_event(card, w, SND_SOC_DAPM_PRE_PMU);
1358 dapm_seq_check_event(card, w, SND_SOC_DAPM_PRE_PMD);
81628103
MB		 1359 }
1360
1361 if (reg >= 0) {
29376bc7
MB		 1362 /* Any widget will do, they should all be updating the
1363 * same register.
1364 */
29376bc7 1365
ce0fc93a 1366 pop_dbg(dapm->dev, card->pop_time,
81628103 1367 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
3a45b867
JN		 1368 value, mask, reg, card->pop_time);
1369 pop_wait(card->pop_time);
ce0fc93a 1370 soc_dapm_update_bits(dapm, reg, mask, value);
b22ead2a
MB		 1371 }
1372
81628103 1373 list_for_each_entry(w, pending, power_list) {
95dd5cd6
LPC		 1374 dapm_seq_check_event(card, w, SND_SOC_DAPM_POST_PMU);
1375 dapm_seq_check_event(card, w, SND_SOC_DAPM_POST_PMD);
81628103 1376 }
b22ead2a 1377}
42aa3418 1378
b22ead2a
MB		 1379/* Apply a DAPM power sequence.
1380 *
1381 * We walk over a pre-sorted list of widgets to apply power to. In
1382 * order to minimise the number of writes to the device required
1383 * multiple widgets will be updated in a single write where possible.
1384 * Currently anything that requires more than a single write is not
1385 * handled.
1386 */
95dd5cd6
LPC		 1387static void dapm_seq_run(struct snd_soc_card *card,
1388 struct list_head *list, int event, bool power_up)
b22ead2a
MB		 1389{
1390 struct snd_soc_dapm_widget *w, *n;
eb270e98 1391 struct snd_soc_dapm_context *d;
b22ead2a
MB		 1392 LIST_HEAD(pending);
1393 int cur_sort = -1;
20e4859d 1394 int cur_subseq = -1;
b22ead2a 1395 int cur_reg = SND_SOC_NOPM;
7be31be8 1396 struct snd_soc_dapm_context *cur_dapm = NULL;
474b62d6 1397 int ret, i;
828a842f
MB		 1398 int *sort;
1399
1400 if (power_up)
1401 sort = dapm_up_seq;
1402 else
1403 sort = dapm_down_seq;
163cac06 1404
b22ead2a
MB		 1405 list_for_each_entry_safe(w, n, list, power_list) {
1406 ret = 0;
1407
1408 /* Do we need to apply any queued changes? */
7be31be8 1409 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
20e4859d 1410 w->dapm != cur_dapm || w->subseq != cur_subseq) {
b22ead2a 1411 if (!list_empty(&pending))
95dd5cd6 1412 dapm_seq_run_coalesced(card, &pending);
b22ead2a 1413
474b62d6
MB		 1414 if (cur_dapm && cur_dapm->seq_notifier) {
1415 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1416 if (sort[i] == cur_sort)
1417 cur_dapm->seq_notifier(cur_dapm,
f85a9e0d
MB		 1418 i,
1419 cur_subseq);
474b62d6
MB		 1420 }
1421
eb270e98
MB		 1422 if (cur_dapm && w->dapm != cur_dapm)
1423 soc_dapm_async_complete(cur_dapm);
1424
b22ead2a
MB		 1425 INIT_LIST_HEAD(&pending);
1426 cur_sort = -1;
b0b3e6f8 1427 cur_subseq = INT_MIN;
b22ead2a 1428 cur_reg = SND_SOC_NOPM;
7be31be8 1429 cur_dapm = NULL;
b22ead2a
MB		 1430 }
1431
163cac06
MB		 1432 switch (w->id) {
1433 case snd_soc_dapm_pre:
1434 if (!w->event)
b22ead2a
MB		 1435 list_for_each_entry_safe_continue(w, n, list,
1436 power_list);
163cac06 1437
b22ead2a 1438 if (event == SND_SOC_DAPM_STREAM_START)
163cac06
MB		 1439 ret = w->event(w,
1440 NULL, SND_SOC_DAPM_PRE_PMU);
b22ead2a 1441 else if (event == SND_SOC_DAPM_STREAM_STOP)
163cac06
MB		 1442 ret = w->event(w,
1443 NULL, SND_SOC_DAPM_PRE_PMD);
163cac06
MB		 1444 break;
1445
1446 case snd_soc_dapm_post:
1447 if (!w->event)
b22ead2a
MB		 1448 list_for_each_entry_safe_continue(w, n, list,
1449 power_list);
163cac06 1450
b22ead2a 1451 if (event == SND_SOC_DAPM_STREAM_START)
163cac06
MB		 1452 ret = w->event(w,
1453 NULL, SND_SOC_DAPM_POST_PMU);
b22ead2a 1454 else if (event == SND_SOC_DAPM_STREAM_STOP)
163cac06
MB		 1455 ret = w->event(w,
1456 NULL, SND_SOC_DAPM_POST_PMD);
163cac06
MB		 1457 break;
1458
b22ead2a 1459 default:
81628103
MB		 1460 /* Queue it up for application */
1461 cur_sort = sort[w->id];
20e4859d 1462 cur_subseq = w->subseq;
81628103 1463 cur_reg = w->reg;
7be31be8 1464 cur_dapm = w->dapm;
81628103
MB		 1465 list_move(&w->power_list, &pending);
1466 break;
163cac06 1467 }
b22ead2a
MB		 1468
1469 if (ret < 0)
f7d41ae8 1470 dev_err(w->dapm->dev,
30a6a1a4 1471 "ASoC: Failed to apply widget power: %d\n", ret);
6ea31b9f 1472 }
b22ead2a
MB		 1473
1474 if (!list_empty(&pending))
95dd5cd6 1475 dapm_seq_run_coalesced(card, &pending);
474b62d6
MB		 1476
1477 if (cur_dapm && cur_dapm->seq_notifier) {
1478 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1479 if (sort[i] == cur_sort)
1480 cur_dapm->seq_notifier(cur_dapm,
f85a9e0d 1481 i, cur_subseq);
474b62d6 1482 }
eb270e98
MB		 1483
1484 list_for_each_entry(d, &card->dapm_list, list) {
1485 soc_dapm_async_complete(d);
1486 }
42aa3418
MB		 1487}
1488
95dd5cd6 1489static void dapm_widget_update(struct snd_soc_card *card)
97404f2e 1490{
95dd5cd6 1491 struct snd_soc_dapm_update *update = card->update;
ce6cfaf1
LPC		 1492 struct snd_soc_dapm_widget_list *wlist;
1493 struct snd_soc_dapm_widget *w = NULL;
1494 unsigned int wi;
97404f2e
MB		 1495 int ret;
1496
57295073 1497 if (!update || !dapm_kcontrol_is_powered(update->kcontrol))
97404f2e
MB		 1498 return;
1499
e84357f7 1500 wlist = dapm_kcontrol_get_wlist(update->kcontrol);
97404f2e 1501
ce6cfaf1
LPC		 1502 for (wi = 0; wi < wlist->num_widgets; wi++) {
1503 w = wlist->widgets[wi];
1504
1505 if (w->event && (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
1506 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
1507 if (ret != 0)
95dd5cd6 1508 dev_err(w->dapm->dev, "ASoC: %s DAPM pre-event failed: %d\n",
ce6cfaf1
LPC		 1509 w->name, ret);
1510 }
97404f2e
MB		 1511 }
1512
ce6cfaf1
LPC		 1513 if (!w)
1514 return;
1515
ce0fc93a
LPC		 1516 ret = soc_dapm_update_bits(w->dapm, update->reg, update->mask,
1517 update->val);
97404f2e 1518 if (ret < 0)
95dd5cd6 1519 dev_err(w->dapm->dev, "ASoC: %s DAPM update failed: %d\n",
30a6a1a4 1520 w->name, ret);
97404f2e 1521
ce6cfaf1
LPC		 1522 for (wi = 0; wi < wlist->num_widgets; wi++) {
1523 w = wlist->widgets[wi];
1524
1525 if (w->event && (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1526 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1527 if (ret != 0)
95dd5cd6 1528 dev_err(w->dapm->dev, "ASoC: %s DAPM post-event failed: %d\n",
ce6cfaf1
LPC		 1529 w->name, ret);
1530 }
97404f2e
MB		 1531 }
1532}
1533
9d0624a7
MB		 1534/* Async callback run prior to DAPM sequences - brings to _PREPARE if
1535 * they're changing state.
1536 */
1537static void dapm_pre_sequence_async(void *data, async_cookie_t cookie)
1538{
1539 struct snd_soc_dapm_context *d = data;
1540 int ret;
1541
56fba41f
MB		 1542 /* If we're off and we're not supposed to be go into STANDBY */
1543 if (d->bias_level == SND_SOC_BIAS_OFF &&
1544 d->target_bias_level != SND_SOC_BIAS_OFF) {
f1aac484
MB		 1545 if (d->dev)
1546 pm_runtime_get_sync(d->dev);
1547
9d0624a7
MB		 1548 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1549 if (ret != 0)
1550 dev_err(d->dev,
30a6a1a4 1551 "ASoC: Failed to turn on bias: %d\n", ret);
9d0624a7
MB		 1552 }
1553
ce85a4d7
LPC		 1554 /* Prepare for a transition to ON or away from ON */
1555 if ((d->target_bias_level == SND_SOC_BIAS_ON &&
1556 d->bias_level != SND_SOC_BIAS_ON) ||
1557 (d->target_bias_level != SND_SOC_BIAS_ON &&
1558 d->bias_level == SND_SOC_BIAS_ON)) {
9d0624a7
MB		 1559 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);
1560 if (ret != 0)
1561 dev_err(d->dev,
30a6a1a4 1562 "ASoC: Failed to prepare bias: %d\n", ret);
9d0624a7
MB		 1563 }
1564}
1565
1566/* Async callback run prior to DAPM sequences - brings to their final
1567 * state.
1568 */
1569static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
1570{
1571 struct snd_soc_dapm_context *d = data;
1572 int ret;
1573
1574 /* If we just powered the last thing off drop to standby bias */
56fba41f
MB		 1575 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1576 (d->target_bias_level == SND_SOC_BIAS_STANDBY ||
1577 d->target_bias_level == SND_SOC_BIAS_OFF)) {
9d0624a7
MB		 1578 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1579 if (ret != 0)
30a6a1a4 1580 dev_err(d->dev, "ASoC: Failed to apply standby bias: %d\n",
9d0624a7
MB		 1581 ret);
1582 }
97404f2e 1583
9d0624a7 1584 /* If we're in standby and can support bias off then do that */
56fba41f
MB		 1585 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1586 d->target_bias_level == SND_SOC_BIAS_OFF) {
9d0624a7
MB		 1587 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);
1588 if (ret != 0)
30a6a1a4
LG		 1589 dev_err(d->dev, "ASoC: Failed to turn off bias: %d\n",
1590 ret);
f1aac484
MB		 1591
1592 if (d->dev)
fb644e9c 1593 pm_runtime_put(d->dev);
9d0624a7
MB		 1594 }
1595
1596 /* If we just powered up then move to active bias */
56fba41f
MB		 1597 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1598 d->target_bias_level == SND_SOC_BIAS_ON) {
9d0624a7
MB		 1599 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);
1600 if (ret != 0)
30a6a1a4 1601 dev_err(d->dev, "ASoC: Failed to apply active bias: %d\n",
9d0624a7
MB		 1602 ret);
1603 }
1604}
97404f2e 1605
fe4fda5d
MB		 1606static void dapm_widget_set_peer_power(struct snd_soc_dapm_widget *peer,
1607 bool power, bool connect)
1608{
1609 /* If a connection is being made or broken then that update
1610 * will have marked the peer dirty, otherwise the widgets are
1611 * not connected and this update has no impact. */
1612 if (!connect)
1613 return;
1614
1615 /* If the peer is already in the state we're moving to then we
1616 * won't have an impact on it. */
1617 if (power != peer->power)
75c1f891 1618 dapm_mark_dirty(peer, "peer state change");
fe4fda5d
MB		 1619}
1620
05623c43
MB		 1621static void dapm_widget_set_power(struct snd_soc_dapm_widget *w, bool power,
1622 struct list_head *up_list,
1623 struct list_head *down_list)
1624{
db432b41
MB		 1625 struct snd_soc_dapm_path *path;
1626
05623c43
MB		 1627 if (w->power == power)
1628 return;
1629
1630 trace_snd_soc_dapm_widget_power(w, power);
1631
db432b41 1632 /* If we changed our power state perhaps our neigbours changed
fe4fda5d 1633 * also.
db432b41
MB		 1634 */
1635 list_for_each_entry(path, &w->sources, list_sink) {
1636 if (path->source) {
fe4fda5d
MB		 1637 dapm_widget_set_peer_power(path->source, power,
1638 path->connect);
db432b41
MB		 1639 }
1640 }
f3bf3e45
MB		 1641 switch (w->id) {
1642 case snd_soc_dapm_supply:
62ea874a 1643 case snd_soc_dapm_regulator_supply:
d7e7eb91 1644 case snd_soc_dapm_clock_supply:
57295073 1645 case snd_soc_dapm_kcontrol:
f3bf3e45
MB		 1646 /* Supplies can't affect their outputs, only their inputs */
1647 break;
1648 default:
1649 list_for_each_entry(path, &w->sinks, list_source) {
1650 if (path->sink) {
1651 dapm_widget_set_peer_power(path->sink, power,
1652 path->connect);
1653 }
db432b41 1654 }
f3bf3e45 1655 break;
db432b41
MB		 1656 }
1657
05623c43
MB		 1658 if (power)
1659 dapm_seq_insert(w, up_list, true);
1660 else
1661 dapm_seq_insert(w, down_list, false);
05623c43
MB		 1662}
1663
7c81beb0
MB		 1664static void dapm_power_one_widget(struct snd_soc_dapm_widget *w,
1665 struct list_head *up_list,
1666 struct list_head *down_list)
1667{
7c81beb0
MB		 1668 int power;
1669
1670 switch (w->id) {
1671 case snd_soc_dapm_pre:
1672 dapm_seq_insert(w, down_list, false);
1673 break;
1674 case snd_soc_dapm_post:
1675 dapm_seq_insert(w, up_list, true);
1676 break;
1677
1678 default:
d805002b 1679 power = dapm_widget_power_check(w);
7c81beb0 1680
05623c43 1681 dapm_widget_set_power(w, power, up_list, down_list);
7c81beb0
MB		 1682 break;
1683 }
1684}
1685
2b97eabc
RP		 1686/*
1687 * Scan each dapm widget for complete audio path.
1688 * A complete path is a route that has valid endpoints i.e.:-
1689 *
1690 * o DAC to output pin.
1691 * o Input Pin to ADC.
1692 * o Input pin to Output pin (bypass, sidetone)
1693 * o DAC to ADC (loopback).
1694 */
95dd5cd6 1695static int dapm_power_widgets(struct snd_soc_card *card, int event)
2b97eabc
RP		 1696{
1697 struct snd_soc_dapm_widget *w;
7be31be8 1698 struct snd_soc_dapm_context *d;
291f3bbc
MB		 1699 LIST_HEAD(up_list);
1700 LIST_HEAD(down_list);
2955b47d 1701 ASYNC_DOMAIN_EXCLUSIVE(async_domain);
56fba41f 1702 enum snd_soc_bias_level bias;
6d3ddc81 1703
f9fa2b18
MB		 1704 lockdep_assert_held(&card->dapm_mutex);
1705
84e90930
MB		 1706 trace_snd_soc_dapm_start(card);
1707
56fba41f 1708 list_for_each_entry(d, &card->dapm_list, list) {
497098be
MB		 1709 if (d->idle_bias_off)
1710 d->target_bias_level = SND_SOC_BIAS_OFF;
1711 else
1712 d->target_bias_level = SND_SOC_BIAS_STANDBY;
56fba41f 1713 }
7be31be8 1714
6c120e19 1715 dapm_reset(card);
9b8a83b2 1716
6d3ddc81 1717 /* Check which widgets we need to power and store them in
db432b41
MB		 1718 * lists indicating if they should be powered up or down. We
1719 * only check widgets that have been flagged as dirty but note
1720 * that new widgets may be added to the dirty list while we
1721 * iterate.
6d3ddc81 1722 */
db432b41 1723 list_for_each_entry(w, &card->dapm_dirty, dirty) {
7c81beb0 1724 dapm_power_one_widget(w, &up_list, &down_list);
2b97eabc
RP		 1725 }
1726
f9de6d74 1727 list_for_each_entry(w, &card->widgets, list) {
0ff97ebf
MB		 1728 switch (w->id) {
1729 case snd_soc_dapm_pre:
1730 case snd_soc_dapm_post:
1731 /* These widgets always need to be powered */
1732 break;
1733 default:
1734 list_del_init(&w->dirty);
1735 break;
1736 }
db432b41 1737
39eb5fd1 1738 if (w->new_power) {
f9de6d74
MB		 1739 d = w->dapm;
1740
1741 /* Supplies and micbiases only bring the
1742 * context up to STANDBY as unless something
1743 * else is active and passing audio they
afe62367
MB		 1744 * generally don't require full power. Signal
1745 * generators are virtual pins and have no
1746 * power impact themselves.
f9de6d74
MB		 1747 */
1748 switch (w->id) {
afe62367 1749 case snd_soc_dapm_siggen:
da83fea6 1750 case snd_soc_dapm_vmid:
afe62367 1751 break;
f9de6d74 1752 case snd_soc_dapm_supply:
62ea874a 1753 case snd_soc_dapm_regulator_supply:
d7e7eb91 1754 case snd_soc_dapm_clock_supply:
f9de6d74
MB		 1755 case snd_soc_dapm_micbias:
1756 if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
1757 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1758 break;
1759 default:
1760 d->target_bias_level = SND_SOC_BIAS_ON;
1761 break;
1762 }
1763 }
1764
1765 }
1766
85a843c5
MB		 1767 /* Force all contexts in the card to the same bias state if
1768 * they're not ground referenced.
1769 */
56fba41f 1770 bias = SND_SOC_BIAS_OFF;
52ba67bf 1771 list_for_each_entry(d, &card->dapm_list, list)
56fba41f
MB		 1772 if (d->target_bias_level > bias)
1773 bias = d->target_bias_level;
52ba67bf 1774 list_for_each_entry(d, &card->dapm_list, list)
85a843c5
MB		 1775 if (!d->idle_bias_off)
1776 d->target_bias_level = bias;
52ba67bf 1777
de02d078 1778 trace_snd_soc_dapm_walk_done(card);
52ba67bf 1779
17282ba4
XX		 1780 /* Run card bias changes at first */
1781 dapm_pre_sequence_async(&card->dapm, 0);
1782 /* Run other bias changes in parallel */
1783 list_for_each_entry(d, &card->dapm_list, list) {
1784 if (d != &card->dapm)
1785 async_schedule_domain(dapm_pre_sequence_async, d,
1786 &async_domain);
1787 }
9d0624a7 1788 async_synchronize_full_domain(&async_domain);
452c5eaa 1789
cf1f7c6e 1790 list_for_each_entry(w, &down_list, power_list) {
95dd5cd6 1791 dapm_seq_check_event(card, w, SND_SOC_DAPM_WILL_PMD);
80114129
MB		 1792 }
1793
cf1f7c6e 1794 list_for_each_entry(w, &up_list, power_list) {
95dd5cd6 1795 dapm_seq_check_event(card, w, SND_SOC_DAPM_WILL_PMU);
80114129
MB		 1796 }
1797
6d3ddc81 1798 /* Power down widgets first; try to avoid amplifying pops. */
95dd5cd6 1799 dapm_seq_run(card, &down_list, event, false);
2b97eabc 1800
95dd5cd6 1801 dapm_widget_update(card);
97404f2e 1802
6d3ddc81 1803 /* Now power up. */
95dd5cd6 1804 dapm_seq_run(card, &up_list, event, true);
2b97eabc 1805
9d0624a7 1806 /* Run all the bias changes in parallel */
17282ba4
XX		 1807 list_for_each_entry(d, &card->dapm_list, list) {
1808 if (d != &card->dapm)
1809 async_schedule_domain(dapm_post_sequence_async, d,
1810 &async_domain);
1811 }
9d0624a7 1812 async_synchronize_full_domain(&async_domain);
17282ba4
XX		 1813 /* Run card bias changes at last */
1814 dapm_post_sequence_async(&card->dapm, 0);
452c5eaa 1815
8078d87f
LG		 1816 /* do we need to notify any clients that DAPM event is complete */
1817 list_for_each_entry(d, &card->dapm_list, list) {
1818 if (d->stream_event)
1819 d->stream_event(d, event);
1820 }
1821
95dd5cd6 1822 pop_dbg(card->dev, card->pop_time,
fd8d3bc0 1823 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
3a45b867 1824 pop_wait(card->pop_time);
cb507e7e 1825
84e90930
MB		 1826 trace_snd_soc_dapm_done(card);
1827
42aa3418 1828 return 0;
2b97eabc
RP		 1829}
1830
79fb9387 1831#ifdef CONFIG_DEBUG_FS
79fb9387
MB		 1832static ssize_t dapm_widget_power_read_file(struct file *file,
1833 char __user *user_buf,
1834 size_t count, loff_t *ppos)
1835{
1836 struct snd_soc_dapm_widget *w = file->private_data;
1837 char *buf;
1838 int in, out;
1839 ssize_t ret;
1840 struct snd_soc_dapm_path *p = NULL;
1841
1842 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1843 if (!buf)
1844 return -ENOMEM;
1845
ec2e3031 1846 in = is_connected_input_ep(w, NULL);
1059ecfa 1847 dapm_clear_walk_input(w->dapm, &w->sources);
ec2e3031 1848 out = is_connected_output_ep(w, NULL);
1059ecfa 1849 dapm_clear_walk_output(w->dapm, &w->sinks);
79fb9387 1850
f13ebada
MB		 1851 ret = snprintf(buf, PAGE_SIZE, "%s: %s%s in %d out %d",
1852 w->name, w->power ? "On" : "Off",
1853 w->force ? " (forced)" : "", in, out);
79fb9387 1854
d033c36a
MB		 1855 if (w->reg >= 0)
1856 ret += snprintf(buf + ret, PAGE_SIZE - ret,
de9ba98b
LPC		 1857 " - R%d(0x%x) mask 0x%x",
1858 w->reg, w->reg, w->mask << w->shift);
d033c36a
MB		 1859
1860 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1861
3eef08ba
MB		 1862 if (w->sname)
1863 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1864 w->sname,
1865 w->active ? "active" : "inactive");
79fb9387
MB		 1866
1867 list_for_each_entry(p, &w->sources, list_sink) {
ff18620c 1868 if (p->connected && !p->connected(w, p->source))
215edda3
MB		 1869 continue;
1870
79fb9387
MB		 1871 if (p->connect)
1872 ret += snprintf(buf + ret, PAGE_SIZE - ret,
67f5ed6e 1873 " in \"%s\" \"%s\"\n",
79fb9387
MB		 1874 p->name ? p->name : "static",
1875 p->source->name);
1876 }
1877 list_for_each_entry(p, &w->sinks, list_source) {
215edda3
MB		 1878 if (p->connected && !p->connected(w, p->sink))
1879 continue;
1880
79fb9387
MB		 1881 if (p->connect)
1882 ret += snprintf(buf + ret, PAGE_SIZE - ret,
67f5ed6e 1883 " out \"%s\" \"%s\"\n",
79fb9387
MB		 1884 p->name ? p->name : "static",
1885 p->sink->name);
1886 }
1887
1888 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1889
1890 kfree(buf);
1891 return ret;
1892}
1893
1894static const struct file_operations dapm_widget_power_fops = {
234e3405 1895 .open = simple_open,
79fb9387 1896 .read = dapm_widget_power_read_file,
6038f373 1897 .llseek = default_llseek,
79fb9387
MB		 1898};
1899
ef49e4fa
MB		 1900static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
1901 size_t count, loff_t *ppos)
1902{
1903 struct snd_soc_dapm_context *dapm = file->private_data;
1904 char *level;
1905
1906 switch (dapm->bias_level) {
1907 case SND_SOC_BIAS_ON:
1908 level = "On\n";
1909 break;
1910 case SND_SOC_BIAS_PREPARE:
1911 level = "Prepare\n";
1912 break;
1913 case SND_SOC_BIAS_STANDBY:
1914 level = "Standby\n";
1915 break;
1916 case SND_SOC_BIAS_OFF:
1917 level = "Off\n";
1918 break;
1919 default:
a6ed0608 1920 WARN(1, "Unknown bias_level %d\n", dapm->bias_level);
ef49e4fa
MB		 1921 level = "Unknown\n";
1922 break;
1923 }
1924
1925 return simple_read_from_buffer(user_buf, count, ppos, level,
1926 strlen(level));
1927}
1928
1929static const struct file_operations dapm_bias_fops = {
234e3405 1930 .open = simple_open,
ef49e4fa
MB		 1931 .read = dapm_bias_read_file,
1932 .llseek = default_llseek,
1933};
1934
8eecaf62
LPC		 1935void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1936 struct dentry *parent)
79fb9387 1937{
79fb9387
MB		 1938 struct dentry *d;
1939
8eecaf62
LPC		 1940 dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
1941
1942 if (!dapm->debugfs_dapm) {
f1e90af2 1943 dev_warn(dapm->dev,
30a6a1a4 1944 "ASoC: Failed to create DAPM debugfs directory\n");
79fb9387 1945 return;
8eecaf62 1946 }
79fb9387 1947
ef49e4fa
MB		 1948 d = debugfs_create_file("bias_level", 0444,
1949 dapm->debugfs_dapm, dapm,
1950 &dapm_bias_fops);
1951 if (!d)
1952 dev_warn(dapm->dev,
1953 "ASoC: Failed to create bias level debugfs file\n");
d5d1e0be 1954}
ef49e4fa 1955
d5d1e0be
LPC		 1956static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1957{
1958 struct snd_soc_dapm_context *dapm = w->dapm;
1959 struct dentry *d;
79fb9387 1960
d5d1e0be
LPC		 1961 if (!dapm->debugfs_dapm || !w->name)
1962 return;
1963
1964 d = debugfs_create_file(w->name, 0444,
1965 dapm->debugfs_dapm, w,
1966 &dapm_widget_power_fops);
1967 if (!d)
1968 dev_warn(w->dapm->dev,
1969 "ASoC: Failed to create %s debugfs file\n",
1970 w->name);
79fb9387 1971}
d5d1e0be 1972
6c45e126
LPC		 1973static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1974{
1975 debugfs_remove_recursive(dapm->debugfs_dapm);
1976}
1977
79fb9387 1978#else
8eecaf62
LPC		 1979void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1980 struct dentry *parent)
79fb9387
MB		 1981{
1982}
d5d1e0be
LPC		 1983
1984static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1985{
1986}
1987
6c45e126
LPC		 1988static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1989{
1990}
1991
79fb9387
MB		 1992#endif
1993
2b97eabc 1994/* test and update the power status of a mux widget */
95dd5cd6 1995static int soc_dapm_mux_update_power(struct snd_soc_card *card,
40f02cd9 1996 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e)
2b97eabc
RP		 1997{
1998 struct snd_soc_dapm_path *path;
1999 int found = 0;
2000
f9fa2b18
MB		 2001 lockdep_assert_held(&card->dapm_mutex);
2002
2b97eabc 2003 /* find dapm widget path assoc with kcontrol */
5106b92f 2004 dapm_kcontrol_for_each_path(path, kcontrol) {
cb01e2b9 2005 if (!path->name || !e->texts[mux])
2b97eabc
RP		 2006 continue;
2007
2008 found = 1;
2009 /* we now need to match the string in the enum to the path */
db432b41 2010 if (!(strcmp(path->name, e->texts[mux]))) {
2b97eabc 2011 path->connect = 1; /* new connection */
75c1f891 2012 dapm_mark_dirty(path->source, "mux connection");
db432b41
MB		 2013 } else {
2014 if (path->connect)
75c1f891
MB		 2015 dapm_mark_dirty(path->source,
2016 "mux disconnection");
2b97eabc 2017 path->connect = 0; /* old connection must be powered down */
db432b41 2018 }
ce6cfaf1 2019 dapm_mark_dirty(path->sink, "mux change");
2b97eabc
RP		 2020 }
2021
ce6cfaf1 2022 if (found)
95dd5cd6 2023 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2b97eabc 2024
618dae11 2025 return found;
2b97eabc 2026}
4edbb345 2027
ce6cfaf1 2028int snd_soc_dapm_mux_update_power(struct snd_soc_dapm_context *dapm,
6b3fc03b
LPC		 2029 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e,
2030 struct snd_soc_dapm_update *update)
4edbb345 2031{
ce6cfaf1 2032 struct snd_soc_card *card = dapm->card;
4edbb345
LG		 2033 int ret;
2034
3cd04343 2035 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
564c6504 2036 card->update = update;
95dd5cd6 2037 ret = soc_dapm_mux_update_power(card, kcontrol, mux, e);
564c6504 2038 card->update = NULL;
4edbb345 2039 mutex_unlock(&card->dapm_mutex);
618dae11 2040 if (ret > 0)
c3f48ae6 2041 soc_dpcm_runtime_update(card);
4edbb345
LG		 2042 return ret;
2043}
40f02cd9 2044EXPORT_SYMBOL_GPL(snd_soc_dapm_mux_update_power);
2b97eabc 2045
1b075e3f 2046/* test and update the power status of a mixer or switch widget */
95dd5cd6 2047static int soc_dapm_mixer_update_power(struct snd_soc_card *card,
283375ce 2048 struct snd_kcontrol *kcontrol, int connect)
2b97eabc
RP		 2049{
2050 struct snd_soc_dapm_path *path;
2051 int found = 0;
2052
f9fa2b18
MB		 2053 lockdep_assert_held(&card->dapm_mutex);
2054
2b97eabc 2055 /* find dapm widget path assoc with kcontrol */
5106b92f 2056 dapm_kcontrol_for_each_path(path, kcontrol) {
2b97eabc 2057 found = 1;
283375ce 2058 path->connect = connect;
75c1f891 2059 dapm_mark_dirty(path->source, "mixer connection");
ce6cfaf1 2060 dapm_mark_dirty(path->sink, "mixer update");
2b97eabc
RP		 2061 }
2062
ce6cfaf1 2063 if (found)
95dd5cd6 2064 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2b97eabc 2065
618dae11 2066 return found;
2b97eabc 2067}
4edbb345 2068
ce6cfaf1 2069int snd_soc_dapm_mixer_update_power(struct snd_soc_dapm_context *dapm,
6b3fc03b
LPC		 2070 struct snd_kcontrol *kcontrol, int connect,
2071 struct snd_soc_dapm_update *update)
4edbb345 2072{
ce6cfaf1 2073 struct snd_soc_card *card = dapm->card;
4edbb345
LG		 2074 int ret;
2075
3cd04343 2076 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
564c6504 2077 card->update = update;
95dd5cd6 2078 ret = soc_dapm_mixer_update_power(card, kcontrol, connect);
564c6504 2079 card->update = NULL;
4edbb345 2080 mutex_unlock(&card->dapm_mutex);
618dae11 2081 if (ret > 0)
c3f48ae6 2082 soc_dpcm_runtime_update(card);
4edbb345
LG		 2083 return ret;
2084}
40f02cd9 2085EXPORT_SYMBOL_GPL(snd_soc_dapm_mixer_update_power);
2b97eabc 2086
44ba2641 2087static ssize_t dapm_widget_show_codec(struct snd_soc_codec *codec, char *buf)
2b97eabc 2088{
2b97eabc
RP		 2089 struct snd_soc_dapm_widget *w;
2090 int count = 0;
2091 char *state = "not set";
2092
97c866de
JN		 2093 list_for_each_entry(w, &codec->card->widgets, list) {
2094 if (w->dapm != &codec->dapm)
2095 continue;
2b97eabc
RP		 2096
2097 /* only display widgets that burnm power */
2098 switch (w->id) {
2099 case snd_soc_dapm_hp:
2100 case snd_soc_dapm_mic:
2101 case snd_soc_dapm_spk:
2102 case snd_soc_dapm_line:
2103 case snd_soc_dapm_micbias:
2104 case snd_soc_dapm_dac:
2105 case snd_soc_dapm_adc:
2106 case snd_soc_dapm_pga:
d88429a6 2107 case snd_soc_dapm_out_drv:
2b97eabc 2108 case snd_soc_dapm_mixer:
ca9c1aae 2109 case snd_soc_dapm_mixer_named_ctl:
246d0a17 2110 case snd_soc_dapm_supply:
62ea874a 2111 case snd_soc_dapm_regulator_supply:
d7e7eb91 2112 case snd_soc_dapm_clock_supply:
2b97eabc
RP		 2113 if (w->name)
2114 count += sprintf(buf + count, "%s: %s\n",
2115 w->name, w->power ? "On":"Off");
2116 break;
2117 default:
2118 break;
2119 }
2120 }
2121
ce6120cc 2122 switch (codec->dapm.bias_level) {
0be9898a
MB		 2123 case SND_SOC_BIAS_ON:
2124 state = "On";
2b97eabc 2125 break;
0be9898a
MB		 2126 case SND_SOC_BIAS_PREPARE:
2127 state = "Prepare";
2b97eabc 2128 break;
0be9898a
MB		 2129 case SND_SOC_BIAS_STANDBY:
2130 state = "Standby";
2b97eabc 2131 break;
0be9898a
MB		 2132 case SND_SOC_BIAS_OFF:
2133 state = "Off";
2b97eabc
RP		 2134 break;
2135 }
2136 count += sprintf(buf + count, "PM State: %s\n", state);
2137
2138 return count;
2139}
2140
44ba2641
BC		 2141/* show dapm widget status in sys fs */
2142static ssize_t dapm_widget_show(struct device *dev,
2143 struct device_attribute *attr, char *buf)
2144{
2145 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
2146 int i, count = 0;
2147
2148 for (i = 0; i < rtd->num_codecs; i++) {
2149 struct snd_soc_codec *codec = rtd->codec_dais[i]->codec;
2150 count += dapm_widget_show_codec(codec, buf + count);
2151 }
2152
2153 return count;
2154}
2155
2b97eabc
RP		 2156static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
2157
2158int snd_soc_dapm_sys_add(struct device *dev)
2159{
12ef193d 2160 return device_create_file(dev, &dev_attr_dapm_widget);
2b97eabc
RP		 2161}
2162
2163static void snd_soc_dapm_sys_remove(struct device *dev)
2164{
aef90843 2165 device_remove_file(dev, &dev_attr_dapm_widget);
2b97eabc
RP		 2166}
2167
8872293f
LPC		 2168static void dapm_free_path(struct snd_soc_dapm_path *path)
2169{
2170 list_del(&path->list_sink);
2171 list_del(&path->list_source);
5106b92f 2172 list_del(&path->list_kcontrol);
8872293f 2173 list_del(&path->list);
8872293f
LPC		 2174 kfree(path);
2175}
2176
2b97eabc 2177/* free all dapm widgets and resources */
ce6120cc 2178static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
2b97eabc
RP		 2179{
2180 struct snd_soc_dapm_widget *w, *next_w;
2181 struct snd_soc_dapm_path *p, *next_p;
2182
97c866de
JN		 2183 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
2184 if (w->dapm != dapm)
2185 continue;
2b97eabc 2186 list_del(&w->list);
8ddab3f5
JN		 2187 /*
2188 * remove source and sink paths associated to this widget.
2189 * While removing the path, remove reference to it from both
2190 * source and sink widgets so that path is removed only once.
2191 */
8872293f
LPC		 2192 list_for_each_entry_safe(p, next_p, &w->sources, list_sink)
2193 dapm_free_path(p);
2194
2195 list_for_each_entry_safe(p, next_p, &w->sinks, list_source)
2196 dapm_free_path(p);
2197
fad59888 2198 kfree(w->kcontrols);
ead9b919 2199 kfree(w->name);
2b97eabc
RP		 2200 kfree(w);
2201 }
2b97eabc
RP		 2202}
2203
91a5fca4
LPC		 2204static struct snd_soc_dapm_widget *dapm_find_widget(
2205 struct snd_soc_dapm_context *dapm, const char *pin,
2206 bool search_other_contexts)
a5302181
LG		 2207{
2208 struct snd_soc_dapm_widget *w;
91a5fca4 2209 struct snd_soc_dapm_widget *fallback = NULL;
a5302181 2210
97c866de 2211 list_for_each_entry(w, &dapm->card->widgets, list) {
a5302181 2212 if (!strcmp(w->name, pin)) {
91a5fca4
LPC		 2213 if (w->dapm == dapm)
2214 return w;
2215 else
2216 fallback = w;
a5302181
LG		 2217 }
2218 }
2219
91a5fca4
LPC		 2220 if (search_other_contexts)
2221 return fallback;
2222
2223 return NULL;
2224}
2225
2226static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
2227 const char *pin, int status)
2228{
2229 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2230
f9fa2b18
MB		 2231 dapm_assert_locked(dapm);
2232
91a5fca4 2233 if (!w) {
30a6a1a4 2234 dev_err(dapm->dev, "ASoC: DAPM unknown pin %s\n", pin);
91a5fca4 2235 return -EINVAL;
0d86733c
MB		 2236 }
2237
1a8b2d9d
MB		 2238 if (w->connected != status)
2239 dapm_mark_dirty(w, "pin configuration");
2240
91a5fca4
LPC		 2241 w->connected = status;
2242 if (status == 0)
2243 w->force = 0;
2244
2245 return 0;
a5302181
LG		 2246}
2247
2b97eabc 2248/**
3eb29dfb 2249 * snd_soc_dapm_sync_unlocked - scan and power dapm paths
ce6120cc 2250 * @dapm: DAPM context
2b97eabc
RP		 2251 *
2252 * Walks all dapm audio paths and powers widgets according to their
2253 * stream or path usage.
2254 *
3eb29dfb
CK		 2255 * Requires external locking.
2256 *
2b97eabc
RP		 2257 * Returns 0 for success.
2258 */
3eb29dfb 2259int snd_soc_dapm_sync_unlocked(struct snd_soc_dapm_context *dapm)
2b97eabc 2260{
4f4c0072
MB		 2261 /*
2262 * Suppress early reports (eg, jacks syncing their state) to avoid
2263 * silly DAPM runs during card startup.
2264 */
2265 if (!dapm->card || !dapm->card->instantiated)
2266 return 0;
2267
3eb29dfb
CK		 2268 return dapm_power_widgets(dapm->card, SND_SOC_DAPM_STREAM_NOP);
2269}
2270EXPORT_SYMBOL_GPL(snd_soc_dapm_sync_unlocked);
2271
2272/**
2273 * snd_soc_dapm_sync - scan and power dapm paths
2274 * @dapm: DAPM context
2275 *
2276 * Walks all dapm audio paths and powers widgets according to their
2277 * stream or path usage.
2278 *
2279 * Returns 0 for success.
2280 */
2281int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
2282{
2283 int ret;
2284
3cd04343 2285 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3eb29dfb 2286 ret = snd_soc_dapm_sync_unlocked(dapm);
a73fb2df
LG		 2287 mutex_unlock(&dapm->card->dapm_mutex);
2288 return ret;
2b97eabc 2289}
a5302181 2290EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
2b97eabc 2291
2553628e
LPC		 2292static int snd_soc_dapm_add_path(struct snd_soc_dapm_context *dapm,
2293 struct snd_soc_dapm_widget *wsource, struct snd_soc_dapm_widget *wsink,
2294 const char *control,
2295 int (*connected)(struct snd_soc_dapm_widget *source,
2296 struct snd_soc_dapm_widget *sink))
2b97eabc
RP		 2297{
2298 struct snd_soc_dapm_path *path;
2553628e 2299 int ret;
2b97eabc
RP		 2300
2301 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
2302 if (!path)
2303 return -ENOMEM;
2304
2305 path->source = wsource;
2306 path->sink = wsink;
2553628e 2307 path->connected = connected;
2b97eabc 2308 INIT_LIST_HEAD(&path->list);
69c2d346 2309 INIT_LIST_HEAD(&path->list_kcontrol);
2b97eabc
RP		 2310 INIT_LIST_HEAD(&path->list_source);
2311 INIT_LIST_HEAD(&path->list_sink);
2312
2313 /* check for external widgets */
2314 if (wsink->id == snd_soc_dapm_input) {
2315 if (wsource->id == snd_soc_dapm_micbias ||
2316 wsource->id == snd_soc_dapm_mic ||
087d53ab
RC		 2317 wsource->id == snd_soc_dapm_line ||
2318 wsource->id == snd_soc_dapm_output)
2b97eabc
RP		 2319 wsink->ext = 1;
2320 }
2321 if (wsource->id == snd_soc_dapm_output) {
2322 if (wsink->id == snd_soc_dapm_spk ||
2323 wsink->id == snd_soc_dapm_hp ||
1e39221e
SF		 2324 wsink->id == snd_soc_dapm_line ||
2325 wsink->id == snd_soc_dapm_input)
2b97eabc
RP		 2326 wsource->ext = 1;
2327 }
2328
34742cb0
LPC		 2329 dapm_mark_dirty(wsource, "Route added");
2330 dapm_mark_dirty(wsink, "Route added");
2331
2b97eabc
RP		 2332 /* connect static paths */
2333 if (control == NULL) {
8ddab3f5 2334 list_add(&path->list, &dapm->card->paths);
2b97eabc
RP		 2335 list_add(&path->list_sink, &wsink->sources);
2336 list_add(&path->list_source, &wsource->sinks);
2337 path->connect = 1;
2338 return 0;
2339 }
2340
2341 /* connect dynamic paths */
dc2bea61 2342 switch (wsink->id) {
2b97eabc
RP		 2343 case snd_soc_dapm_adc:
2344 case snd_soc_dapm_dac:
2345 case snd_soc_dapm_pga:
d88429a6 2346 case snd_soc_dapm_out_drv:
2b97eabc
RP		 2347 case snd_soc_dapm_input:
2348 case snd_soc_dapm_output:
1ab97c8c 2349 case snd_soc_dapm_siggen:
2b97eabc
RP		 2350 case snd_soc_dapm_micbias:
2351 case snd_soc_dapm_vmid:
2352 case snd_soc_dapm_pre:
2353 case snd_soc_dapm_post:
246d0a17 2354 case snd_soc_dapm_supply:
62ea874a 2355 case snd_soc_dapm_regulator_supply:
d7e7eb91 2356 case snd_soc_dapm_clock_supply:
010ff262
MB		 2357 case snd_soc_dapm_aif_in:
2358 case snd_soc_dapm_aif_out:
4616274d
MB		 2359 case snd_soc_dapm_dai_in:
2360 case snd_soc_dapm_dai_out:
c74184ed 2361 case snd_soc_dapm_dai_link:
57295073 2362 case snd_soc_dapm_kcontrol:
8ddab3f5 2363 list_add(&path->list, &dapm->card->paths);
2b97eabc
RP		 2364 list_add(&path->list_sink, &wsink->sources);
2365 list_add(&path->list_source, &wsource->sinks);
2366 path->connect = 1;
2367 return 0;
2368 case snd_soc_dapm_mux:
ce6120cc 2369 ret = dapm_connect_mux(dapm, wsource, wsink, path, control,
82cfecdc 2370 &wsink->kcontrol_news[0]);
2b97eabc
RP		 2371 if (ret != 0)
2372 goto err;
2373 break;
2374 case snd_soc_dapm_switch:
2375 case snd_soc_dapm_mixer:
ca9c1aae 2376 case snd_soc_dapm_mixer_named_ctl:
ce6120cc 2377 ret = dapm_connect_mixer(dapm, wsource, wsink, path, control);
2b97eabc
RP		 2378 if (ret != 0)
2379 goto err;
2380 break;
2381 case snd_soc_dapm_hp:
2382 case snd_soc_dapm_mic:
2383 case snd_soc_dapm_line:
2384 case snd_soc_dapm_spk:
8ddab3f5 2385 list_add(&path->list, &dapm->card->paths);
2b97eabc
RP		 2386 list_add(&path->list_sink, &wsink->sources);
2387 list_add(&path->list_source, &wsource->sinks);
2388 path->connect = 0;
2389 return 0;
2390 }
fabd0384 2391
2b97eabc 2392 return 0;
2553628e
LPC		 2393err:
2394 kfree(path);
2395 return ret;
2396}
2b97eabc 2397
2553628e 2398static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
a4e9154c 2399 const struct snd_soc_dapm_route *route)
2553628e
LPC		 2400{
2401 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
2402 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
2403 const char *sink;
2404 const char *source;
2405 char prefixed_sink[80];
2406 char prefixed_source[80];
94f99c87 2407 const char *prefix;
2553628e
LPC		 2408 int ret;
2409
94f99c87
LPC		 2410 prefix = soc_dapm_prefix(dapm);
2411 if (prefix) {
2553628e 2412 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
94f99c87 2413 prefix, route->sink);
2553628e
LPC		 2414 sink = prefixed_sink;
2415 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
94f99c87 2416 prefix, route->source);
2553628e
LPC		 2417 source = prefixed_source;
2418 } else {
2419 sink = route->sink;
2420 source = route->source;
2421 }
2422
2423 /*
2424 * find src and dest widgets over all widgets but favor a widget from
2425 * current DAPM context
2426 */
2427 list_for_each_entry(w, &dapm->card->widgets, list) {
2428 if (!wsink && !(strcmp(w->name, sink))) {
2429 wtsink = w;
2430 if (w->dapm == dapm)
2431 wsink = w;
2432 continue;
2433 }
2434 if (!wsource && !(strcmp(w->name, source))) {
2435 wtsource = w;
2436 if (w->dapm == dapm)
2437 wsource = w;
2438 }
2439 }
2440 /* use widget from another DAPM context if not found from this */
2441 if (!wsink)
2442 wsink = wtsink;
2443 if (!wsource)
2444 wsource = wtsource;
2445
2446 if (wsource == NULL) {
2447 dev_err(dapm->dev, "ASoC: no source widget found for %s\n",
2448 route->source);
2449 return -ENODEV;
2450 }
2451 if (wsink == NULL) {
2452 dev_err(dapm->dev, "ASoC: no sink widget found for %s\n",
2453 route->sink);
2454 return -ENODEV;
2455 }
2456
2457 ret = snd_soc_dapm_add_path(dapm, wsource, wsink, route->control,
2458 route->connected);
2459 if (ret)
2460 goto err;
2461
2462 return 0;
2b97eabc 2463err:
30a6a1a4 2464 dev_warn(dapm->dev, "ASoC: no dapm match for %s --> %s --> %s\n",
2553628e 2465 source, route->control, sink);
2b97eabc
RP		 2466 return ret;
2467}
105f1c28 2468
efcc3c61
MB		 2469static int snd_soc_dapm_del_route(struct snd_soc_dapm_context *dapm,
2470 const struct snd_soc_dapm_route *route)
2471{
2472 struct snd_soc_dapm_path *path, *p;
2473 const char *sink;
2474 const char *source;
2475 char prefixed_sink[80];
2476 char prefixed_source[80];
94f99c87 2477 const char *prefix;
efcc3c61
MB		 2478
2479 if (route->control) {
2480 dev_err(dapm->dev,
30a6a1a4 2481 "ASoC: Removal of routes with controls not supported\n");
efcc3c61
MB		 2482 return -EINVAL;
2483 }
2484
94f99c87
LPC		 2485 prefix = soc_dapm_prefix(dapm);
2486 if (prefix) {
efcc3c61 2487 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
94f99c87 2488 prefix, route->sink);
efcc3c61
MB		 2489 sink = prefixed_sink;
2490 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
94f99c87 2491 prefix, route->source);
efcc3c61
MB		 2492 source = prefixed_source;
2493 } else {
2494 sink = route->sink;
2495 source = route->source;
2496 }
2497
2498 path = NULL;
2499 list_for_each_entry(p, &dapm->card->paths, list) {
2500 if (strcmp(p->source->name, source) != 0)
2501 continue;
2502 if (strcmp(p->sink->name, sink) != 0)
2503 continue;
2504 path = p;
2505 break;
2506 }
2507
2508 if (path) {
2509 dapm_mark_dirty(path->source, "Route removed");
2510 dapm_mark_dirty(path->sink, "Route removed");
2511
8872293f 2512 dapm_free_path(path);
efcc3c61 2513 } else {
30a6a1a4 2514 dev_warn(dapm->dev, "ASoC: Route %s->%s does not exist\n",
efcc3c61
MB		 2515 source, sink);
2516 }
2517
2518 return 0;
2519}
2520
105f1c28
MB		 2521/**
2522 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
ce6120cc 2523 * @dapm: DAPM context
105f1c28
MB		 2524 * @route: audio routes
2525 * @num: number of routes
2526 *
2527 * Connects 2 dapm widgets together via a named audio path. The sink is
2528 * the widget receiving the audio signal, whilst the source is the sender
2529 * of the audio signal.
2530 *
2531 * Returns 0 for success else error. On error all resources can be freed
2532 * with a call to snd_soc_card_free().
2533 */
ce6120cc 2534int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
105f1c28
MB		 2535 const struct snd_soc_dapm_route *route, int num)
2536{
62d4a4b9 2537 int i, r, ret = 0;
105f1c28 2538
a73fb2df 2539 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
105f1c28 2540 for (i = 0; i < num; i++) {
a4e9154c 2541 r = snd_soc_dapm_add_route(dapm, route);
62d4a4b9 2542 if (r < 0) {
30a6a1a4
LG		 2543 dev_err(dapm->dev, "ASoC: Failed to add route %s -> %s -> %s\n",
2544 route->source,
2545 route->control ? route->control : "direct",
2546 route->sink);
62d4a4b9 2547 ret = r;
105f1c28
MB		 2548 }
2549 route++;
2550 }
a73fb2df 2551 mutex_unlock(&dapm->card->dapm_mutex);
105f1c28 2552
60884c27 2553 return ret;
105f1c28
MB		 2554}
2555EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
2556
efcc3c61
MB		 2557/**
2558 * snd_soc_dapm_del_routes - Remove routes between DAPM widgets
2559 * @dapm: DAPM context
2560 * @route: audio routes
2561 * @num: number of routes
2562 *
2563 * Removes routes from the DAPM context.
2564 */
2565int snd_soc_dapm_del_routes(struct snd_soc_dapm_context *dapm,
2566 const struct snd_soc_dapm_route *route, int num)
2567{
2568 int i, ret = 0;
2569
2570 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2571 for (i = 0; i < num; i++) {
2572 snd_soc_dapm_del_route(dapm, route);
2573 route++;
2574 }
2575 mutex_unlock(&dapm->card->dapm_mutex);
2576
2577 return ret;
2578}
2579EXPORT_SYMBOL_GPL(snd_soc_dapm_del_routes);
2580
bf3a9e13
MB		 2581static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm,
2582 const struct snd_soc_dapm_route *route)
2583{
2584 struct snd_soc_dapm_widget *source = dapm_find_widget(dapm,
2585 route->source,
2586 true);
2587 struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm,
2588 route->sink,
2589 true);
2590 struct snd_soc_dapm_path *path;
2591 int count = 0;
2592
2593 if (!source) {
30a6a1a4 2594 dev_err(dapm->dev, "ASoC: Unable to find source %s for weak route\n",
bf3a9e13
MB		 2595 route->source);
2596 return -ENODEV;
2597 }
2598
2599 if (!sink) {
30a6a1a4 2600 dev_err(dapm->dev, "ASoC: Unable to find sink %s for weak route\n",
bf3a9e13
MB		 2601 route->sink);
2602 return -ENODEV;
2603 }
2604
2605 if (route->control || route->connected)
30a6a1a4 2606 dev_warn(dapm->dev, "ASoC: Ignoring control for weak route %s->%s\n",
bf3a9e13
MB		 2607 route->source, route->sink);
2608
2609 list_for_each_entry(path, &source->sinks, list_source) {
2610 if (path->sink == sink) {
2611 path->weak = 1;
2612 count++;
2613 }
2614 }
2615
2616 if (count == 0)
30a6a1a4 2617 dev_err(dapm->dev, "ASoC: No path found for weak route %s->%s\n",
bf3a9e13
MB		 2618 route->source, route->sink);
2619 if (count > 1)
30a6a1a4 2620 dev_warn(dapm->dev, "ASoC: %d paths found for weak route %s->%s\n",
bf3a9e13
MB		 2621 count, route->source, route->sink);
2622
2623 return 0;
2624}
2625
2626/**
2627 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
2628 * @dapm: DAPM context
2629 * @route: audio routes
2630 * @num: number of routes
2631 *
2632 * Mark existing routes matching those specified in the passed array
2633 * as being weak, meaning that they are ignored for the purpose of
2634 * power decisions. The main intended use case is for sidetone paths
2635 * which couple audio between other independent paths if they are both
2636 * active in order to make the combination work better at the user
2637 * level but which aren't intended to be "used".
2638 *
2639 * Note that CODEC drivers should not use this as sidetone type paths
2640 * can frequently also be used as bypass paths.
2641 */
2642int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm,
2643 const struct snd_soc_dapm_route *route, int num)
2644{
2645 int i, err;
2646 int ret = 0;
2647
a73fb2df 2648 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
bf3a9e13
MB		 2649 for (i = 0; i < num; i++) {
2650 err = snd_soc_dapm_weak_route(dapm, route);
2651 if (err)
2652 ret = err;
2653 route++;
2654 }
a73fb2df 2655 mutex_unlock(&dapm->card->dapm_mutex);
bf3a9e13
MB		 2656
2657 return ret;
2658}
2659EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes);
2660
2b97eabc
RP		 2661/**
2662 * snd_soc_dapm_new_widgets - add new dapm widgets
ce6120cc 2663 * @dapm: DAPM context
2b97eabc
RP		 2664 *
2665 * Checks the codec for any new dapm widgets and creates them if found.
2666 *
2667 * Returns 0 for success.
2668 */
824ef826 2669int snd_soc_dapm_new_widgets(struct snd_soc_card *card)
2b97eabc
RP		 2670{
2671 struct snd_soc_dapm_widget *w;
b66a70d5 2672 unsigned int val;
2b97eabc 2673
95dd5cd6 2674 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
a73fb2df 2675
95dd5cd6 2676 list_for_each_entry(w, &card->widgets, list)
2b97eabc
RP		 2677 {
2678 if (w->new)
2679 continue;
2680
fad59888
SW		 2681 if (w->num_kcontrols) {
2682 w->kcontrols = kzalloc(w->num_kcontrols *
2683 sizeof(struct snd_kcontrol *),
2684 GFP_KERNEL);
a73fb2df 2685 if (!w->kcontrols) {
95dd5cd6 2686 mutex_unlock(&card->dapm_mutex);
fad59888 2687 return -ENOMEM;
a73fb2df 2688 }
fad59888
SW		 2689 }
2690
2b97eabc
RP		 2691 switch(w->id) {
2692 case snd_soc_dapm_switch:
2693 case snd_soc_dapm_mixer:
ca9c1aae 2694 case snd_soc_dapm_mixer_named_ctl:
4b80b8c2 2695 dapm_new_mixer(w);
2b97eabc
RP		 2696 break;
2697 case snd_soc_dapm_mux:
4b80b8c2 2698 dapm_new_mux(w);
2b97eabc 2699 break;
2b97eabc 2700 case snd_soc_dapm_pga:
d88429a6 2701 case snd_soc_dapm_out_drv:
4b80b8c2 2702 dapm_new_pga(w);
2b97eabc 2703 break;
7ca3a18b 2704 default:
2b97eabc
RP		 2705 break;
2706 }
b66a70d5
MB		 2707
2708 /* Read the initial power state from the device */
2709 if (w->reg >= 0) {
ce0fc93a 2710 soc_dapm_read(w->dapm, w->reg, &val);
f7d3c170 2711 val = val >> w->shift;
de9ba98b
LPC		 2712 val &= w->mask;
2713 if (val == w->on_val)
b66a70d5
MB		 2714 w->power = 1;
2715 }
2716
2b97eabc 2717 w->new = 1;
d5d1e0be 2718
7508b12a 2719 dapm_mark_dirty(w, "new widget");
d5d1e0be 2720 dapm_debugfs_add_widget(w);
2b97eabc
RP		 2721 }
2722
95dd5cd6
LPC		 2723 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2724 mutex_unlock(&card->dapm_mutex);
2b97eabc
RP		 2725 return 0;
2726}
2727EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
2728
2729/**
2730 * snd_soc_dapm_get_volsw - dapm mixer get callback
2731 * @kcontrol: mixer control
ac11a2b3 2732 * @ucontrol: control element information
2b97eabc
RP		 2733 *
2734 * Callback to get the value of a dapm mixer control.
2735 *
2736 * Returns 0 for success.
2737 */
2738int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
2739 struct snd_ctl_elem_value *ucontrol)
2740{
ce0fc93a
LPC		 2741 struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
2742 struct snd_soc_card *card = dapm->card;
4eaa9819
JS		 2743 struct soc_mixer_control *mc =
2744 (struct soc_mixer_control *)kcontrol->private_value;
249ce138 2745 int reg = mc->reg;
815ecf8d 2746 unsigned int shift = mc->shift;
4eaa9819 2747 int max = mc->max;
815ecf8d 2748 unsigned int mask = (1 << fls(max)) - 1;
da602ab8 2749 unsigned int invert = mc->invert;
57295073 2750 unsigned int val;
ce0fc93a 2751 int ret = 0;
da602ab8
BT		 2752
2753 if (snd_soc_volsw_is_stereo(mc))
ce0fc93a 2754 dev_warn(dapm->dev,
30a6a1a4 2755 "ASoC: Control '%s' is stereo, which is not supported\n",
da602ab8 2756 kcontrol->id.name);
2b97eabc 2757
57295073 2758 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
ce0fc93a
LPC		 2759 if (dapm_kcontrol_is_powered(kcontrol) && reg != SND_SOC_NOPM) {
2760 ret = soc_dapm_read(dapm, reg, &val);
2761 val = (val >> shift) & mask;
2762 } else {
57295073 2763 val = dapm_kcontrol_get_value(kcontrol);
ce0fc93a 2764 }
57295073
LPC		 2765 mutex_unlock(&card->dapm_mutex);
2766
da602ab8 2767 if (invert)
57295073
LPC		 2768 ucontrol->value.integer.value[0] = max - val;
2769 else
2770 ucontrol->value.integer.value[0] = val;
2b97eabc 2771
ce0fc93a 2772 return ret;
2b97eabc
RP		 2773}
2774EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
2775
2776/**
2777 * snd_soc_dapm_put_volsw - dapm mixer set callback
2778 * @kcontrol: mixer control
ac11a2b3 2779 * @ucontrol: control element information
2b97eabc
RP		 2780 *
2781 * Callback to set the value of a dapm mixer control.
2782 *
2783 * Returns 0 for success.
2784 */
2785int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
2786 struct snd_ctl_elem_value *ucontrol)
2787{
ce0fc93a
LPC		 2788 struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
2789 struct snd_soc_card *card = dapm->card;
4eaa9819
JS		 2790 struct soc_mixer_control *mc =
2791 (struct soc_mixer_control *)kcontrol->private_value;
249ce138 2792 int reg = mc->reg;
815ecf8d 2793 unsigned int shift = mc->shift;
4eaa9819 2794 int max = mc->max;
815ecf8d
JS		 2795 unsigned int mask = (1 << fls(max)) - 1;
2796 unsigned int invert = mc->invert;
e9cf7049 2797 unsigned int val;
18626c7e 2798 int connect, change, reg_change = 0;
97404f2e 2799 struct snd_soc_dapm_update update;
52765976 2800 int ret = 0;
2b97eabc 2801
da602ab8 2802 if (snd_soc_volsw_is_stereo(mc))
ce0fc93a 2803 dev_warn(dapm->dev,
30a6a1a4 2804 "ASoC: Control '%s' is stereo, which is not supported\n",
da602ab8
BT		 2805 kcontrol->id.name);
2806
2b97eabc 2807 val = (ucontrol->value.integer.value[0] & mask);
8a720718 2808 connect = !!val;
2b97eabc
RP		 2809
2810 if (invert)
a7a4ac86 2811 val = max - val;
2b97eabc 2812
3cd04343 2813 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2b97eabc 2814
249ce138 2815 change = dapm_kcontrol_set_value(kcontrol, val);
97404f2e 2816
18626c7e
JN		 2817 if (reg != SND_SOC_NOPM) {
2818 mask = mask << shift;
2819 val = val << shift;
2820
ce0fc93a 2821 reg_change = soc_dapm_test_bits(dapm, reg, mask, val);
18626c7e
JN		 2822 }
2823
2824 if (change || reg_change) {
2825 if (reg_change) {
2826 update.kcontrol = kcontrol;
2827 update.reg = reg;
2828 update.mask = mask;
2829 update.val = val;
2830 card->update = &update;
249ce138 2831 }
18626c7e 2832 change |= reg_change;
97404f2e 2833
52765976 2834 ret = soc_dapm_mixer_update_power(card, kcontrol, connect);
fafd2176 2835
564c6504 2836 card->update = NULL;
283375ce
MB		 2837 }
2838
a73fb2df 2839 mutex_unlock(&card->dapm_mutex);
52765976
NC		 2840
2841 if (ret > 0)
2842 soc_dpcm_runtime_update(card);
2843
56a67834 2844 return change;
2b97eabc
RP		 2845}
2846EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
2847
2848/**
2849 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
2850 * @kcontrol: mixer control
ac11a2b3 2851 * @ucontrol: control element information
2b97eabc
RP		 2852 *
2853 * Callback to get the value of a dapm enumerated double mixer control.
2854 *
2855 * Returns 0 for success.
2856 */
2857int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
2858 struct snd_ctl_elem_value *ucontrol)
2859{
ce0fc93a 2860 struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
2b97eabc 2861 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
3727b496 2862 unsigned int reg_val, val;
ce0fc93a 2863 int ret = 0;
52765976 2864
236aaa68 2865 if (e->reg != SND_SOC_NOPM)
ce0fc93a 2866 ret = soc_dapm_read(dapm, e->reg, &reg_val);
236aaa68
LPC		 2867 else
2868 reg_val = dapm_kcontrol_get_value(kcontrol);
2e72f8e3 2869
2e72f8e3 2870 val = (reg_val >> e->shift_l) & e->mask;
3727b496 2871 ucontrol->value.enumerated.item[0] = snd_soc_enum_val_to_item(e, val);
2e72f8e3
PU		 2872 if (e->shift_l != e->shift_r) {
2873 val = (reg_val >> e->shift_r) & e->mask;
3727b496
LPC		 2874 val = snd_soc_enum_val_to_item(e, val);
2875 ucontrol->value.enumerated.item[1] = val;
2e72f8e3
PU		 2876 }
2877
ce0fc93a 2878 return ret;
2e72f8e3 2879}
2b97eabc 2880EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
2e72f8e3
PU		 2881
2882/**
2b97eabc 2883 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
2e72f8e3
PU		 2884 * @kcontrol: mixer control
2885 * @ucontrol: control element information
2886 *
2b97eabc 2887 * Callback to set the value of a dapm enumerated double mixer control.
2e72f8e3
PU		 2888 *
2889 * Returns 0 for success.
2890 */
2b97eabc 2891int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
2e72f8e3
PU		 2892 struct snd_ctl_elem_value *ucontrol)
2893{
ce0fc93a
LPC		 2894 struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
2895 struct snd_soc_card *card = dapm->card;
74155556 2896 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
3727b496
LPC		 2897 unsigned int *item = ucontrol->value.enumerated.item;
2898 unsigned int val, change;
46f5822f 2899 unsigned int mask;
97404f2e 2900 struct snd_soc_dapm_update update;
52765976 2901 int ret = 0;
2e72f8e3 2902
3727b496 2903 if (item[0] >= e->items)
2e72f8e3 2904 return -EINVAL;
3727b496
LPC		 2905
2906 val = snd_soc_enum_item_to_val(e, item[0]) << e->shift_l;
2e72f8e3
PU		 2907 mask = e->mask << e->shift_l;
2908 if (e->shift_l != e->shift_r) {
3727b496 2909 if (item[1] > e->items)
2e72f8e3 2910 return -EINVAL;
3727b496 2911 val |= snd_soc_enum_item_to_val(e, item[1]) << e->shift_l;
2e72f8e3
PU		 2912 mask |= e->mask << e->shift_r;
2913 }
2914
3cd04343 2915 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
fafd2176 2916
236aaa68 2917 if (e->reg != SND_SOC_NOPM)
ce0fc93a 2918 change = soc_dapm_test_bits(dapm, e->reg, mask, val);
236aaa68
LPC		 2919 else
2920 change = dapm_kcontrol_set_value(kcontrol, val);
2921
fafd2176 2922 if (change) {
236aaa68
LPC		 2923 if (e->reg != SND_SOC_NOPM) {
2924 update.kcontrol = kcontrol;
2925 update.reg = e->reg;
2926 update.mask = mask;
2927 update.val = val;
2928 card->update = &update;
2929 }
1642e3d4 2930
3727b496 2931 ret = soc_dapm_mux_update_power(card, kcontrol, item[0], e);
fafd2176 2932
564c6504 2933 card->update = NULL;
fafd2176 2934 }
2e72f8e3 2935
a73fb2df 2936 mutex_unlock(&card->dapm_mutex);
52765976
NC		 2937
2938 if (ret > 0)
2939 soc_dpcm_runtime_update(card);
2940
97404f2e 2941 return change;
2e72f8e3 2942}
2b97eabc 2943EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
2e72f8e3 2944
8b37dbd2
MB		 2945/**
2946 * snd_soc_dapm_info_pin_switch - Info for a pin switch
2947 *
2948 * @kcontrol: mixer control
2949 * @uinfo: control element information
2950 *
2951 * Callback to provide information about a pin switch control.
2952 */
2953int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
2954 struct snd_ctl_elem_info *uinfo)
2955{
2956 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2957 uinfo->count = 1;
2958 uinfo->value.integer.min = 0;
2959 uinfo->value.integer.max = 1;
2960
2961 return 0;
2962}
2963EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
2964
2965/**
2966 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
2967 *
2968 * @kcontrol: mixer control
2969 * @ucontrol: Value
2970 */
2971int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
2972 struct snd_ctl_elem_value *ucontrol)
2973{
48a8c394 2974 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
8b37dbd2
MB		 2975 const char *pin = (const char *)kcontrol->private_value;
2976
3cd04343 2977 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
8b37dbd2
MB		 2978
2979 ucontrol->value.integer.value[0] =
48a8c394 2980 snd_soc_dapm_get_pin_status(&card->dapm, pin);
8b37dbd2 2981
a73fb2df 2982 mutex_unlock(&card->dapm_mutex);
8b37dbd2
MB		 2983
2984 return 0;
2985}
2986EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
2987
2988/**
2989 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
2990 *
2991 * @kcontrol: mixer control
2992 * @ucontrol: Value
2993 */
2994int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
2995 struct snd_ctl_elem_value *ucontrol)
2996{
48a8c394 2997 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
8b37dbd2
MB		 2998 const char *pin = (const char *)kcontrol->private_value;
2999
8b37dbd2 3000 if (ucontrol->value.integer.value[0])
48a8c394 3001 snd_soc_dapm_enable_pin(&card->dapm, pin);
8b37dbd2 3002 else
48a8c394 3003 snd_soc_dapm_disable_pin(&card->dapm, pin);
8b37dbd2 3004
a73fb2df 3005 snd_soc_dapm_sync(&card->dapm);
8b37dbd2
MB		 3006 return 0;
3007}
3008EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
3009
5ba06fc9
MB		 3010static struct snd_soc_dapm_widget *
3011snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
3012 const struct snd_soc_dapm_widget *widget)
2b97eabc
RP		 3013{
3014 struct snd_soc_dapm_widget *w;
94f99c87 3015 const char *prefix;
62ea874a 3016 int ret;
2b97eabc
RP		 3017
3018 if ((w = dapm_cnew_widget(widget)) == NULL)
5ba06fc9 3019 return NULL;
2b97eabc 3020
62ea874a
MB		 3021 switch (w->id) {
3022 case snd_soc_dapm_regulator_supply:
a3cc056b
LG		 3023 w->regulator = devm_regulator_get(dapm->dev, w->name);
3024 if (IS_ERR(w->regulator)) {
3025 ret = PTR_ERR(w->regulator);
30a6a1a4 3026 dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n",
62ea874a 3027 w->name, ret);
5ba06fc9 3028 return NULL;
62ea874a 3029 }
8784c77a 3030
de9ba98b 3031 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
8784c77a
MB		 3032 ret = regulator_allow_bypass(w->regulator, true);
3033 if (ret != 0)
3034 dev_warn(w->dapm->dev,
30686c35 3035 "ASoC: Failed to bypass %s: %d\n",
8784c77a
MB		 3036 w->name, ret);
3037 }
62ea874a 3038 break;
d7e7eb91 3039 case snd_soc_dapm_clock_supply:
165961ef 3040#ifdef CONFIG_CLKDEV_LOOKUP
695594f1 3041 w->clk = devm_clk_get(dapm->dev, w->name);
d7e7eb91
OL		 3042 if (IS_ERR(w->clk)) {
3043 ret = PTR_ERR(w->clk);
30a6a1a4 3044 dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n",
d7e7eb91
OL		 3045 w->name, ret);
3046 return NULL;
3047 }
ec02995a
MB		 3048#else
3049 return NULL;
3050#endif
d7e7eb91 3051 break;
62ea874a
MB		 3052 default:
3053 break;
3054 }
2b97eabc 3055
94f99c87
LPC		 3056 prefix = soc_dapm_prefix(dapm);
3057 if (prefix)
3058 w->name = kasprintf(GFP_KERNEL, "%s %s", prefix, widget->name);
2b581074
LPC		 3059 else
3060 w->name = kasprintf(GFP_KERNEL, "%s", widget->name);
3061
ead9b919
JN		 3062 if (w->name == NULL) {
3063 kfree(w);
5ba06fc9 3064 return NULL;
ead9b919 3065 }
ead9b919 3066
7ca3a18b
MB		 3067 switch (w->id) {
3068 case snd_soc_dapm_switch:
3069 case snd_soc_dapm_mixer:
3070 case snd_soc_dapm_mixer_named_ctl:
3071 w->power_check = dapm_generic_check_power;
3072 break;
3073 case snd_soc_dapm_mux:
7ca3a18b
MB		 3074 w->power_check = dapm_generic_check_power;
3075 break;
4616274d 3076 case snd_soc_dapm_dai_out:
7ca3a18b
MB		 3077 w->power_check = dapm_adc_check_power;
3078 break;
4616274d 3079 case snd_soc_dapm_dai_in:
7ca3a18b
MB		 3080 w->power_check = dapm_dac_check_power;
3081 break;
63c69a6e
MB		 3082 case snd_soc_dapm_adc:
3083 case snd_soc_dapm_aif_out:
3084 case snd_soc_dapm_dac:
3085 case snd_soc_dapm_aif_in:
7ca3a18b
MB		 3086 case snd_soc_dapm_pga:
3087 case snd_soc_dapm_out_drv:
3088 case snd_soc_dapm_input:
3089 case snd_soc_dapm_output:
3090 case snd_soc_dapm_micbias:
3091 case snd_soc_dapm_spk:
3092 case snd_soc_dapm_hp:
3093 case snd_soc_dapm_mic:
3094 case snd_soc_dapm_line:
c74184ed 3095 case snd_soc_dapm_dai_link:
7ca3a18b
MB		 3096 w->power_check = dapm_generic_check_power;
3097 break;
3098 case snd_soc_dapm_supply:
62ea874a 3099 case snd_soc_dapm_regulator_supply:
d7e7eb91 3100 case snd_soc_dapm_clock_supply:
57295073 3101 case snd_soc_dapm_kcontrol:
7ca3a18b
MB		 3102 w->power_check = dapm_supply_check_power;
3103 break;
3104 default:
3105 w->power_check = dapm_always_on_check_power;
3106 break;
3107 }
3108
ce6120cc
LG		 3109 w->dapm = dapm;
3110 w->codec = dapm->codec;
2b97eabc
RP		 3111 INIT_LIST_HEAD(&w->sources);
3112 INIT_LIST_HEAD(&w->sinks);
3113 INIT_LIST_HEAD(&w->list);
db432b41 3114 INIT_LIST_HEAD(&w->dirty);
97c866de 3115 list_add(&w->list, &dapm->card->widgets);
2b97eabc
RP		 3116
3117 /* machine layer set ups unconnected pins and insertions */
3118 w->connected = 1;
5ba06fc9 3119 return w;
2b97eabc 3120}
2b97eabc 3121
4ba1327a
MB		 3122/**
3123 * snd_soc_dapm_new_controls - create new dapm controls
ce6120cc 3124 * @dapm: DAPM context
4ba1327a
MB		 3125 * @widget: widget array
3126 * @num: number of widgets
3127 *
3128 * Creates new DAPM controls based upon the templates.
3129 *
3130 * Returns 0 for success else error.
3131 */
ce6120cc 3132int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
4ba1327a
MB		 3133 const struct snd_soc_dapm_widget *widget,
3134 int num)
3135{
5ba06fc9
MB		 3136 struct snd_soc_dapm_widget *w;
3137 int i;
60884c27 3138 int ret = 0;
4ba1327a 3139
a73fb2df 3140 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
4ba1327a 3141 for (i = 0; i < num; i++) {
5ba06fc9
MB		 3142 w = snd_soc_dapm_new_control(dapm, widget);
3143 if (!w) {
f7d41ae8 3144 dev_err(dapm->dev,
5ba06fc9
MB		 3145 "ASoC: Failed to create DAPM control %s\n",
3146 widget->name);
60884c27
DC		 3147 ret = -ENOMEM;
3148 break;
b8b33cb5 3149 }
4ba1327a
MB		 3150 widget++;
3151 }
a73fb2df 3152 mutex_unlock(&dapm->card->dapm_mutex);
60884c27 3153 return ret;
4ba1327a
MB		 3154}
3155EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
3156
c74184ed
MB		 3157static int snd_soc_dai_link_event(struct snd_soc_dapm_widget *w,
3158 struct snd_kcontrol *kcontrol, int event)
3159{
3160 struct snd_soc_dapm_path *source_p, *sink_p;
3161 struct snd_soc_dai *source, *sink;
3162 const struct snd_soc_pcm_stream *config = w->params;
3163 struct snd_pcm_substream substream;
9747cec2 3164 struct snd_pcm_hw_params *params = NULL;
c74184ed
MB		 3165 u64 fmt;
3166 int ret;
3167
bf4edea8
TI		 3168 if (WARN_ON(!config) ||
3169 WARN_ON(list_empty(&w->sources) || list_empty(&w->sinks)))
3170 return -EINVAL;
c74184ed
MB		 3171
3172 /* We only support a single source and sink, pick the first */
3173 source_p = list_first_entry(&w->sources, struct snd_soc_dapm_path,
3174 list_sink);
3175 sink_p = list_first_entry(&w->sinks, struct snd_soc_dapm_path,
3176 list_source);
3177
bf4edea8
TI		 3178 if (WARN_ON(!source_p || !sink_p) ||
3179 WARN_ON(!sink_p->source || !source_p->sink) ||
3180 WARN_ON(!source_p->source || !sink_p->sink))
3181 return -EINVAL;
c74184ed
MB		 3182
3183 source = source_p->source->priv;
3184 sink = sink_p->sink->priv;
3185
3186 /* Be a little careful as we don't want to overflow the mask array */
3187 if (config->formats) {
3188 fmt = ffs(config->formats) - 1;
3189 } else {
30a6a1a4 3190 dev_warn(w->dapm->dev, "ASoC: Invalid format %llx specified\n",
c74184ed
MB		 3191 config->formats);
3192 fmt = 0;
3193 }
3194
3195 /* Currently very limited parameter selection */
9747cec2
MB		 3196 params = kzalloc(sizeof(*params), GFP_KERNEL);
3197 if (!params) {
3198 ret = -ENOMEM;
3199 goto out;
3200 }
3201 snd_mask_set(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), fmt);
c74184ed 3202
9747cec2 3203 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->min =
c74184ed 3204 config->rate_min;
9747cec2 3205 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->max =
c74184ed
MB		 3206 config->rate_max;
3207
9747cec2 3208 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->min
c74184ed 3209 = config->channels_min;
9747cec2 3210 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->max
c74184ed
MB		 3211 = config->channels_max;
3212
3213 memset(&substream, 0, sizeof(substream));
3214
3215 switch (event) {
3216 case SND_SOC_DAPM_PRE_PMU:
3217 if (source->driver->ops && source->driver->ops->hw_params) {
3218 substream.stream = SNDRV_PCM_STREAM_CAPTURE;
3219 ret = source->driver->ops->hw_params(&substream,
9747cec2 3220 params, source);
c74184ed
MB		 3221 if (ret != 0) {
3222 dev_err(source->dev,
30a6a1a4 3223 "ASoC: hw_params() failed: %d\n", ret);
9747cec2 3224 goto out;
c74184ed
MB		 3225 }
3226 }
3227
3228 if (sink->driver->ops && sink->driver->ops->hw_params) {
3229 substream.stream = SNDRV_PCM_STREAM_PLAYBACK;
9747cec2 3230 ret = sink->driver->ops->hw_params(&substream, params,
c74184ed
MB		 3231 sink);
3232 if (ret != 0) {
3233 dev_err(sink->dev,
30a6a1a4 3234 "ASoC: hw_params() failed: %d\n", ret);
9747cec2 3235 goto out;
c74184ed
MB		 3236 }
3237 }
3238 break;
3239
3240 case SND_SOC_DAPM_POST_PMU:
da18396f
MB		 3241 ret = snd_soc_dai_digital_mute(sink, 0,
3242 SNDRV_PCM_STREAM_PLAYBACK);
c74184ed 3243 if (ret != 0 && ret != -ENOTSUPP)
30a6a1a4 3244 dev_warn(sink->dev, "ASoC: Failed to unmute: %d\n", ret);
9747cec2 3245 ret = 0;
c74184ed
MB		 3246 break;
3247
3248 case SND_SOC_DAPM_PRE_PMD:
da18396f
MB		 3249 ret = snd_soc_dai_digital_mute(sink, 1,
3250 SNDRV_PCM_STREAM_PLAYBACK);
c74184ed 3251 if (ret != 0 && ret != -ENOTSUPP)
30a6a1a4 3252 dev_warn(sink->dev, "ASoC: Failed to mute: %d\n", ret);
9747cec2 3253 ret = 0;
c74184ed
MB		 3254 break;
3255
3256 default:
a6ed0608 3257 WARN(1, "Unknown event %d\n", event);
c74184ed
MB		 3258 return -EINVAL;
3259 }
3260
9747cec2
MB		 3261out:
3262 kfree(params);
3263 return ret;
c74184ed
MB		 3264}
3265
3266int snd_soc_dapm_new_pcm(struct snd_soc_card *card,
3267 const struct snd_soc_pcm_stream *params,
3268 struct snd_soc_dapm_widget *source,
3269 struct snd_soc_dapm_widget *sink)
3270{
c74184ed
MB		 3271 struct snd_soc_dapm_widget template;
3272 struct snd_soc_dapm_widget *w;
3273 size_t len;
3274 char *link_name;
fe83897f 3275 int ret;
c74184ed
MB		 3276
3277 len = strlen(source->name) + strlen(sink->name) + 2;
3278 link_name = devm_kzalloc(card->dev, len, GFP_KERNEL);
3279 if (!link_name)
3280 return -ENOMEM;
3281 snprintf(link_name, len, "%s-%s", source->name, sink->name);
3282
3283 memset(&template, 0, sizeof(template));
3284 template.reg = SND_SOC_NOPM;
3285 template.id = snd_soc_dapm_dai_link;
3286 template.name = link_name;
3287 template.event = snd_soc_dai_link_event;
3288 template.event_flags = SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
3289 SND_SOC_DAPM_PRE_PMD;
3290
30a6a1a4 3291 dev_dbg(card->dev, "ASoC: adding %s widget\n", link_name);
c74184ed
MB		 3292
3293 w = snd_soc_dapm_new_control(&card->dapm, &template);
3294 if (!w) {
30a6a1a4 3295 dev_err(card->dev, "ASoC: Failed to create %s widget\n",
c74184ed
MB		 3296 link_name);
3297 return -ENOMEM;
3298 }
3299
3300 w->params = params;
3301
fe83897f
LPC		 3302 ret = snd_soc_dapm_add_path(&card->dapm, source, w, NULL, NULL);
3303 if (ret)
3304 return ret;
3305 return snd_soc_dapm_add_path(&card->dapm, w, sink, NULL, NULL);
c74184ed
MB		 3306}
3307
888df395
MB		 3308int snd_soc_dapm_new_dai_widgets(struct snd_soc_dapm_context *dapm,
3309 struct snd_soc_dai *dai)
2b97eabc 3310{
888df395 3311 struct snd_soc_dapm_widget template;
2b97eabc
RP		 3312 struct snd_soc_dapm_widget *w;
3313
888df395
MB		 3314 WARN_ON(dapm->dev != dai->dev);
3315
3316 memset(&template, 0, sizeof(template));
3317 template.reg = SND_SOC_NOPM;
3318
3319 if (dai->driver->playback.stream_name) {
4616274d 3320 template.id = snd_soc_dapm_dai_in;
888df395
MB		 3321 template.name = dai->driver->playback.stream_name;
3322 template.sname = dai->driver->playback.stream_name;
3323
30a6a1a4 3324 dev_dbg(dai->dev, "ASoC: adding %s widget\n",
888df395
MB		 3325 template.name);
3326
3327 w = snd_soc_dapm_new_control(dapm, &template);
3328 if (!w) {
30a6a1a4 3329 dev_err(dapm->dev, "ASoC: Failed to create %s widget\n",
888df395 3330 dai->driver->playback.stream_name);
298402a3 3331 return -ENOMEM;
888df395
MB		 3332 }
3333
3334 w->priv = dai;
3335 dai->playback_widget = w;
3336 }
3337
3338 if (dai->driver->capture.stream_name) {
4616274d 3339 template.id = snd_soc_dapm_dai_out;
888df395
MB		 3340 template.name = dai->driver->capture.stream_name;
3341 template.sname = dai->driver->capture.stream_name;
3342
30a6a1a4 3343 dev_dbg(dai->dev, "ASoC: adding %s widget\n",
888df395
MB		 3344 template.name);
3345
3346 w = snd_soc_dapm_new_control(dapm, &template);
3347 if (!w) {
30a6a1a4 3348 dev_err(dapm->dev, "ASoC: Failed to create %s widget\n",
888df395 3349 dai->driver->capture.stream_name);
298402a3 3350 return -ENOMEM;
888df395
MB		 3351 }
3352
3353 w->priv = dai;
3354 dai->capture_widget = w;
3355 }
3356
3357 return 0;
3358}
3359
3360int snd_soc_dapm_link_dai_widgets(struct snd_soc_card *card)
3361{
3362 struct snd_soc_dapm_widget *dai_w, *w;
0f9bd7b1 3363 struct snd_soc_dapm_widget *src, *sink;
888df395 3364 struct snd_soc_dai *dai;
888df395
MB		 3365
3366 /* For each DAI widget... */
3367 list_for_each_entry(dai_w, &card->widgets, list) {
4616274d
MB		 3368 switch (dai_w->id) {
3369 case snd_soc_dapm_dai_in:
3370 case snd_soc_dapm_dai_out:
3371 break;
3372 default:
2b97eabc 3373 continue;
4616274d 3374 }
888df395
MB		 3375
3376 dai = dai_w->priv;
3377
3378 /* ...find all widgets with the same stream and link them */
3379 list_for_each_entry(w, &card->widgets, list) {
3380 if (w->dapm != dai_w->dapm)
3381 continue;
3382
4616274d
MB		 3383 switch (w->id) {
3384 case snd_soc_dapm_dai_in:
3385 case snd_soc_dapm_dai_out:
888df395 3386 continue;
4616274d
MB		 3387 default:
3388 break;
3389 }
888df395 3390
19c2c5f5 3391 if (!w->sname || !strstr(w->sname, dai_w->name))
888df395
MB		 3392 continue;
3393
0f9bd7b1
LPC		 3394 if (dai_w->id == snd_soc_dapm_dai_in) {
3395 src = dai_w;
3396 sink = w;
3397 } else {
3398 src = w;
3399 sink = dai_w;
2b97eabc 3400 }
0f9bd7b1
LPC		 3401 dev_dbg(dai->dev, "%s -> %s\n", src->name, sink->name);
3402 snd_soc_dapm_add_path(w->dapm, src, sink, NULL, NULL);
2b97eabc
RP		 3403 }
3404 }
2b97eabc 3405
888df395
MB		 3406 return 0;
3407}
64a648c2 3408
44ba2641
BC		 3409static void dapm_connect_dai_link_widgets(struct snd_soc_card *card,
3410 struct snd_soc_pcm_runtime *rtd)
b893ea5f 3411{
44ba2641 3412 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
9887c20b 3413 struct snd_soc_dapm_widget *sink, *source;
44ba2641 3414 struct snd_soc_dapm_route r;
b893ea5f
LG		 3415 int i;
3416
44ba2641 3417 memset(&r, 0, sizeof(r));
b893ea5f 3418
44ba2641
BC		 3419 for (i = 0; i < rtd->num_codecs; i++) {
3420 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
b893ea5f
LG		 3421
3422 /* there is no point in connecting BE DAI links with dummies */
3423 if (snd_soc_dai_is_dummy(codec_dai) ||
3424 snd_soc_dai_is_dummy(cpu_dai))
3425 continue;
3426
3427 /* connect BE DAI playback if widgets are valid */
3428 if (codec_dai->playback_widget && cpu_dai->playback_widget) {
9887c20b
LPC		 3429 source = cpu_dai->playback_widget;
3430 sink = codec_dai->playback_widget;
b893ea5f 3431 dev_dbg(rtd->dev, "connected DAI link %s:%s -> %s:%s\n",
f4333203
LPC		 3432 cpu_dai->component->name, source->name,
3433 codec_dai->component->name, sink->name);
b893ea5f 3434
9887c20b
LPC		 3435 snd_soc_dapm_add_path(&card->dapm, source, sink,
3436 NULL, NULL);
b893ea5f
LG		 3437 }
3438
3439 /* connect BE DAI capture if widgets are valid */
3440 if (codec_dai->capture_widget && cpu_dai->capture_widget) {
9887c20b
LPC		 3441 source = codec_dai->capture_widget;
3442 sink = cpu_dai->capture_widget;
b893ea5f 3443 dev_dbg(rtd->dev, "connected DAI link %s:%s -> %s:%s\n",
f4333203
LPC		 3444 codec_dai->component->name, source->name,
3445 cpu_dai->component->name, sink->name);
b893ea5f 3446
9887c20b
LPC		 3447 snd_soc_dapm_add_path(&card->dapm, source, sink,
3448 NULL, NULL);
b893ea5f 3449 }
b893ea5f
LG		 3450 }
3451}
3452
c471fdd1 3453static void soc_dapm_dai_stream_event(struct snd_soc_dai *dai, int stream,
d9b0951b 3454 int event)
2b97eabc 3455{
c471fdd1 3456 struct snd_soc_dapm_widget *w;
7bd3a6f3 3457
c471fdd1
LPC		 3458 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
3459 w = dai->playback_widget;
3460 else
3461 w = dai->capture_widget;
fe360685 3462
c471fdd1
LPC		 3463 if (w) {
3464 dapm_mark_dirty(w, "stream event");
d9b0951b
LG		 3465
3466 switch (event) {
3467 case SND_SOC_DAPM_STREAM_START:
c471fdd1 3468 w->active = 1;
d9b0951b
LG		 3469 break;
3470 case SND_SOC_DAPM_STREAM_STOP:
c471fdd1 3471 w->active = 0;
d9b0951b
LG		 3472 break;
3473 case SND_SOC_DAPM_STREAM_SUSPEND:
3474 case SND_SOC_DAPM_STREAM_RESUME:
3475 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
3476 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
3477 break;
3478 }
3479 }
c471fdd1 3480}
d9b0951b 3481
44ba2641
BC		 3482void snd_soc_dapm_connect_dai_link_widgets(struct snd_soc_card *card)
3483{
3484 struct snd_soc_pcm_runtime *rtd = card->rtd;
3485 int i;
3486
3487 /* for each BE DAI link... */
3488 for (i = 0; i < card->num_rtd; i++) {
3489 rtd = &card->rtd[i];
3490
3491 /*
3492 * dynamic FE links have no fixed DAI mapping.
3493 * CODEC<->CODEC links have no direct connection.
3494 */
3495 if (rtd->dai_link->dynamic || rtd->dai_link->params)
3496 continue;
3497
3498 dapm_connect_dai_link_widgets(card, rtd);
3499 }
3500}
3501
c471fdd1
LPC		 3502static void soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
3503 int event)
3504{
44ba2641
BC		 3505 int i;
3506
c471fdd1 3507 soc_dapm_dai_stream_event(rtd->cpu_dai, stream, event);
44ba2641
BC		 3508 for (i = 0; i < rtd->num_codecs; i++)
3509 soc_dapm_dai_stream_event(rtd->codec_dais[i], stream, event);
2b97eabc 3510
95dd5cd6 3511 dapm_power_widgets(rtd->card, event);
ce6120cc
LG		 3512}
3513
3514/**
3515 * snd_soc_dapm_stream_event - send a stream event to the dapm core
3516 * @rtd: PCM runtime data
3517 * @stream: stream name
3518 * @event: stream event
3519 *
3520 * Sends a stream event to the dapm core. The core then makes any
3521 * necessary widget power changes.
3522 *
3523 * Returns 0 for success else error.
3524 */
d9b0951b
LG		 3525void snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
3526 int event)
ce6120cc 3527{
a73fb2df 3528 struct snd_soc_card *card = rtd->card;
ce6120cc 3529
3cd04343 3530 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
d9b0951b 3531 soc_dapm_stream_event(rtd, stream, event);
a73fb2df 3532 mutex_unlock(&card->dapm_mutex);
2b97eabc 3533}
2b97eabc 3534
11391100
CK		 3535/**
3536 * snd_soc_dapm_enable_pin_unlocked - enable pin.
3537 * @dapm: DAPM context
3538 * @pin: pin name
3539 *
3540 * Enables input/output pin and its parents or children widgets iff there is
3541 * a valid audio route and active audio stream.
3542 *
3543 * Requires external locking.
3544 *
3545 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3546 * do any widget power switching.
3547 */
3548int snd_soc_dapm_enable_pin_unlocked(struct snd_soc_dapm_context *dapm,
3549 const char *pin)
3550{
3551 return snd_soc_dapm_set_pin(dapm, pin, 1);
3552}
3553EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin_unlocked);
3554
2b97eabc 3555/**
a5302181 3556 * snd_soc_dapm_enable_pin - enable pin.
ce6120cc 3557 * @dapm: DAPM context
a5302181 3558 * @pin: pin name
2b97eabc 3559 *
74b8f955 3560 * Enables input/output pin and its parents or children widgets iff there is
a5302181 3561 * a valid audio route and active audio stream.
11391100 3562 *
a5302181
LG		 3563 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3564 * do any widget power switching.
2b97eabc 3565 */
ce6120cc 3566int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
2b97eabc 3567{
11391100
CK		 3568 int ret;
3569
3570 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3571
3572 ret = snd_soc_dapm_set_pin(dapm, pin, 1);
3573
3574 mutex_unlock(&dapm->card->dapm_mutex);
3575
3576 return ret;
a5302181
LG		 3577}
3578EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
2b97eabc 3579
da34183e 3580/**
11391100 3581 * snd_soc_dapm_force_enable_pin_unlocked - force a pin to be enabled
ce6120cc 3582 * @dapm: DAPM context
da34183e
MB		 3583 * @pin: pin name
3584 *
3585 * Enables input/output pin regardless of any other state. This is
3586 * intended for use with microphone bias supplies used in microphone
3587 * jack detection.
3588 *
11391100
CK		 3589 * Requires external locking.
3590 *
da34183e
MB		 3591 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3592 * do any widget power switching.
3593 */
11391100
CK		 3594int snd_soc_dapm_force_enable_pin_unlocked(struct snd_soc_dapm_context *dapm,
3595 const char *pin)
da34183e 3596{
91a5fca4 3597 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
da34183e 3598
91a5fca4 3599 if (!w) {
30a6a1a4 3600 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
91a5fca4 3601 return -EINVAL;
0d86733c
MB		 3602 }
3603
30a6a1a4 3604 dev_dbg(w->dapm->dev, "ASoC: force enable pin %s\n", pin);
91a5fca4
LPC		 3605 w->connected = 1;
3606 w->force = 1;
75c1f891 3607 dapm_mark_dirty(w, "force enable");
da34183e 3608
91a5fca4 3609 return 0;
da34183e 3610}
11391100
CK		 3611EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin_unlocked);
3612
3613/**
3614 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
3615 * @dapm: DAPM context
3616 * @pin: pin name
3617 *
3618 * Enables input/output pin regardless of any other state. This is
3619 * intended for use with microphone bias supplies used in microphone
3620 * jack detection.
3621 *
3622 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3623 * do any widget power switching.
3624 */
3625int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
3626 const char *pin)
3627{
3628 int ret;
3629
3630 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3631
3632 ret = snd_soc_dapm_force_enable_pin_unlocked(dapm, pin);
3633
3634 mutex_unlock(&dapm->card->dapm_mutex);
3635
3636 return ret;
3637}
da34183e
MB		 3638EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
3639
11391100
CK		 3640/**
3641 * snd_soc_dapm_disable_pin_unlocked - disable pin.
3642 * @dapm: DAPM context
3643 * @pin: pin name
3644 *
3645 * Disables input/output pin and its parents or children widgets.
3646 *
3647 * Requires external locking.
3648 *
3649 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3650 * do any widget power switching.
3651 */
3652int snd_soc_dapm_disable_pin_unlocked(struct snd_soc_dapm_context *dapm,
3653 const char *pin)
3654{
3655 return snd_soc_dapm_set_pin(dapm, pin, 0);
3656}
3657EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin_unlocked);
3658
a5302181
LG		 3659/**
3660 * snd_soc_dapm_disable_pin - disable pin.
ce6120cc 3661 * @dapm: DAPM context
a5302181
LG		 3662 * @pin: pin name
3663 *
74b8f955 3664 * Disables input/output pin and its parents or children widgets.
11391100 3665 *
a5302181
LG		 3666 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3667 * do any widget power switching.
3668 */
ce6120cc
LG		 3669int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
3670 const char *pin)
a5302181 3671{
11391100
CK		 3672 int ret;
3673
3674 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3675
3676 ret = snd_soc_dapm_set_pin(dapm, pin, 0);
3677
3678 mutex_unlock(&dapm->card->dapm_mutex);
3679
3680 return ret;
2b97eabc 3681}
a5302181 3682EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
2b97eabc 3683
11391100
CK		 3684/**
3685 * snd_soc_dapm_nc_pin_unlocked - permanently disable pin.
3686 * @dapm: DAPM context
3687 * @pin: pin name
3688 *
3689 * Marks the specified pin as being not connected, disabling it along
3690 * any parent or child widgets. At present this is identical to
3691 * snd_soc_dapm_disable_pin() but in future it will be extended to do
3692 * additional things such as disabling controls which only affect
3693 * paths through the pin.
3694 *
3695 * Requires external locking.
3696 *
3697 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3698 * do any widget power switching.
3699 */
3700int snd_soc_dapm_nc_pin_unlocked(struct snd_soc_dapm_context *dapm,
3701 const char *pin)
3702{
3703 return snd_soc_dapm_set_pin(dapm, pin, 0);
3704}
3705EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin_unlocked);
3706
5817b52a
MB		 3707/**
3708 * snd_soc_dapm_nc_pin - permanently disable pin.
ce6120cc 3709 * @dapm: DAPM context
5817b52a
MB		 3710 * @pin: pin name
3711 *
3712 * Marks the specified pin as being not connected, disabling it along
3713 * any parent or child widgets. At present this is identical to
3714 * snd_soc_dapm_disable_pin() but in future it will be extended to do
3715 * additional things such as disabling controls which only affect
3716 * paths through the pin.
3717 *
3718 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3719 * do any widget power switching.
3720 */
ce6120cc 3721int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
5817b52a 3722{
11391100
CK		 3723 int ret;
3724
3725 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3726
3727 ret = snd_soc_dapm_set_pin(dapm, pin, 0);
3728
3729 mutex_unlock(&dapm->card->dapm_mutex);
3730
3731 return ret;
5817b52a
MB		 3732}
3733EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
3734
eeec12bf 3735/**
a5302181 3736 * snd_soc_dapm_get_pin_status - get audio pin status
ce6120cc 3737 * @dapm: DAPM context
a5302181 3738 * @pin: audio signal pin endpoint (or start point)
eeec12bf 3739 *
a5302181 3740 * Get audio pin status - connected or disconnected.
eeec12bf 3741 *
a5302181 3742 * Returns 1 for connected otherwise 0.
eeec12bf 3743 */
ce6120cc
LG		 3744int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
3745 const char *pin)
eeec12bf 3746{
91a5fca4 3747 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
eeec12bf 3748
91a5fca4
LPC		 3749 if (w)
3750 return w->connected;
a68b38ad 3751
eeec12bf
GG		 3752 return 0;
3753}
a5302181 3754EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
eeec12bf 3755
1547aba9
MB		 3756/**
3757 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
ce6120cc 3758 * @dapm: DAPM context
1547aba9
MB		 3759 * @pin: audio signal pin endpoint (or start point)
3760 *
3761 * Mark the given endpoint or pin as ignoring suspend. When the
3762 * system is disabled a path between two endpoints flagged as ignoring
3763 * suspend will not be disabled. The path must already be enabled via
3764 * normal means at suspend time, it will not be turned on if it was not
3765 * already enabled.
3766 */
ce6120cc
LG		 3767int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
3768 const char *pin)
1547aba9 3769{
91a5fca4 3770 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
1547aba9 3771
91a5fca4 3772 if (!w) {
30a6a1a4 3773 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
91a5fca4 3774 return -EINVAL;
1547aba9
MB		 3775 }
3776
91a5fca4
LPC		 3777 w->ignore_suspend = 1;
3778
3779 return 0;
1547aba9
MB		 3780}
3781EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
3782
1633281b
SW		 3783static bool snd_soc_dapm_widget_in_card_paths(struct snd_soc_card *card,
3784 struct snd_soc_dapm_widget *w)
3785{
3786 struct snd_soc_dapm_path *p;
3787
3788 list_for_each_entry(p, &card->paths, list) {
3789 if ((p->source == w) || (p->sink == w)) {
3790 dev_dbg(card->dev,
3791 "... Path %s(id:%d dapm:%p) - %s(id:%d dapm:%p)\n",
3792 p->source->name, p->source->id, p->source->dapm,
3793 p->sink->name, p->sink->id, p->sink->dapm);
3794
3795 /* Connected to something other than the codec */
3796 if (p->source->dapm != p->sink->dapm)
3797 return true;
3798 /*
3799 * Loopback connection from codec external pin to
3800 * codec external pin
3801 */
3802 if (p->sink->id == snd_soc_dapm_input) {
3803 switch (p->source->id) {
3804 case snd_soc_dapm_output:
3805 case snd_soc_dapm_micbias:
3806 return true;
3807 default:
3808 break;
3809 }
3810 }
3811 }
3812 }
3813
3814 return false;
3815}
3816
3817/**
7df37884
LPC		 3818 * snd_soc_dapm_auto_nc_pins - call snd_soc_dapm_nc_pin for unused pins
3819 * @card: The card whose pins should be processed
1633281b 3820 *
7df37884
LPC		 3821 * Automatically call snd_soc_dapm_nc_pin() for any external pins in the card
3822 * which are unused. Pins are used if they are connected externally to a
3823 * component, whether that be to some other device, or a loop-back connection to
3824 * the component itself.
1633281b 3825 */
7df37884 3826void snd_soc_dapm_auto_nc_pins(struct snd_soc_card *card)
1633281b 3827{
1633281b
SW		 3828 struct snd_soc_dapm_widget *w;
3829
7df37884 3830 dev_dbg(card->dev, "ASoC: Auto NC: DAPMs: card:%p\n", &card->dapm);
1633281b
SW		 3831
3832 list_for_each_entry(w, &card->widgets, list) {
1633281b
SW		 3833 switch (w->id) {
3834 case snd_soc_dapm_input:
3835 case snd_soc_dapm_output:
3836 case snd_soc_dapm_micbias:
7df37884 3837 dev_dbg(card->dev, "ASoC: Auto NC: Checking widget %s\n",
1633281b
SW		 3838 w->name);
3839 if (!snd_soc_dapm_widget_in_card_paths(card, w)) {
7df37884 3840 dev_dbg(card->dev,
1633281b 3841 "... Not in map; disabling\n");
7df37884 3842 snd_soc_dapm_nc_pin(w->dapm, w->name);
1633281b
SW		 3843 }
3844 break;
3845 default:
3846 break;
3847 }
3848 }
3849}
3850
2b97eabc
RP		 3851/**
3852 * snd_soc_dapm_free - free dapm resources
728a5222 3853 * @dapm: DAPM context
2b97eabc
RP		 3854 *
3855 * Free all dapm widgets and resources.
3856 */
ce6120cc 3857void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
2b97eabc 3858{
ce6120cc 3859 snd_soc_dapm_sys_remove(dapm->dev);
6c45e126 3860 dapm_debugfs_cleanup(dapm);
ce6120cc 3861 dapm_free_widgets(dapm);
7be31be8 3862 list_del(&dapm->list);
2b97eabc
RP		 3863}
3864EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
3865
57996358 3866static void soc_dapm_shutdown_dapm(struct snd_soc_dapm_context *dapm)
51737470 3867{
01005a72 3868 struct snd_soc_card *card = dapm->card;
51737470
MB		 3869 struct snd_soc_dapm_widget *w;
3870 LIST_HEAD(down_list);
3871 int powerdown = 0;
3872
01005a72
LG		 3873 mutex_lock(&card->dapm_mutex);
3874
97c866de
JN		 3875 list_for_each_entry(w, &dapm->card->widgets, list) {
3876 if (w->dapm != dapm)
3877 continue;
51737470 3878 if (w->power) {
828a842f 3879 dapm_seq_insert(w, &down_list, false);
c2caa4da 3880 w->power = 0;
51737470
MB		 3881 powerdown = 1;
3882 }
3883 }
3884
3885 /* If there were no widgets to power down we're already in
3886 * standby.
3887 */
3888 if (powerdown) {
7679e42e
MB		 3889 if (dapm->bias_level == SND_SOC_BIAS_ON)
3890 snd_soc_dapm_set_bias_level(dapm,
3891 SND_SOC_BIAS_PREPARE);
95dd5cd6 3892 dapm_seq_run(card, &down_list, 0, false);
7679e42e
MB		 3893 if (dapm->bias_level == SND_SOC_BIAS_PREPARE)
3894 snd_soc_dapm_set_bias_level(dapm,
3895 SND_SOC_BIAS_STANDBY);
51737470 3896 }
01005a72
LG		 3897
3898 mutex_unlock(&card->dapm_mutex);
f0fba2ad
LG		 3899}
3900
3901/*
3902 * snd_soc_dapm_shutdown - callback for system shutdown
3903 */
3904void snd_soc_dapm_shutdown(struct snd_soc_card *card)
3905{
57996358 3906 struct snd_soc_dapm_context *dapm;
f0fba2ad 3907
57996358 3908 list_for_each_entry(dapm, &card->dapm_list, list) {
17282ba4
XX		 3909 if (dapm != &card->dapm) {
3910 soc_dapm_shutdown_dapm(dapm);
3911 if (dapm->bias_level == SND_SOC_BIAS_STANDBY)
3912 snd_soc_dapm_set_bias_level(dapm,
3913 SND_SOC_BIAS_OFF);
3914 }
ce6120cc 3915 }
17282ba4
XX		 3916
3917 soc_dapm_shutdown_dapm(&card->dapm);
3918 if (card->dapm.bias_level == SND_SOC_BIAS_STANDBY)
3919 snd_soc_dapm_set_bias_level(&card->dapm,
3920 SND_SOC_BIAS_OFF);
51737470
MB		 3921}
3922
2b97eabc 3923/* Module information */
d331124d 3924MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2b97eabc
RP		 3925MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
3926MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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