sound/soc/soc-dapm.c

   1 /*
   2  * soc-dapm.c  --  ALSA SoC Dynamic Audio Power Management
   3  *
   4  * Copyright 2005 Wolfson Microelectronics PLC.
   5  * Author: Liam Girdwood <lrg@slimlogic.co.uk>
   6  *
   7  *  This program is free software; you can redistribute  it and/or modify it
   8  *  under  the terms of  the GNU General  Public License as published by the
   9  *  Free Software Foundation;  either version 2 of the  License, or (at your
  10  *  option) any later version.
  11  *
  12  *  Features:
  13  *    o Changes power status of internal codec blocks depending on the
  14  *      dynamic configuration of codec internal audio paths and active
  15  *      DACs/ADCs.
  16  *    o Platform power domain - can support external components i.e. amps and
  17  *      mic/headphone insertion events.
  18  *    o Automatic Mic Bias support
  19  *    o Jack insertion power event initiation - e.g. hp insertion will enable
  20  *      sinks, dacs, etc
  21  *    o Delayed power down of audio subsystem to reduce pops between a quick
  22  *      device reopen.
  23  *
  24  */
  25
  26 #include <linux/module.h>
  27 #include <linux/moduleparam.h>
  28 #include <linux/init.h>
  29 #include <linux/async.h>
  30 #include <linux/delay.h>
  31 #include <linux/pm.h>
  32 #include <linux/bitops.h>
  33 #include <linux/platform_device.h>
  34 #include <linux/jiffies.h>
  35 #include <linux/debugfs.h>
  36 #include <linux/pm_runtime.h>
  37 #include <linux/regulator/consumer.h>
  38 #include <linux/clk.h>
  39 #include <linux/slab.h>
  40 #include <sound/core.h>
  41 #include <sound/pcm.h>
  42 #include <sound/pcm_params.h>
  43 #include <sound/soc.h>
  44 #include <sound/initval.h>
  45
  46 #include <trace/events/asoc.h>
  47
  48 #define DAPM_UPDATE_STAT(widget, val) widget->dapm->card->dapm_stats.val++;
  49
  50 static int snd_soc_dapm_add_path(struct snd_soc_dapm_context *dapm,
  51         struct snd_soc_dapm_widget *wsource, struct snd_soc_dapm_widget *wsink,
  52         const char *control,
  53         int (*connected)(struct snd_soc_dapm_widget *source,
  54                          struct snd_soc_dapm_widget *sink));
  55 static struct snd_soc_dapm_widget *
  56 snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
  57                          const struct snd_soc_dapm_widget *widget);
  58
  59 /* dapm power sequences - make this per codec in the future */
  60 static int dapm_up_seq[] = {
  61         [snd_soc_dapm_pre] = 0,
  62         [snd_soc_dapm_regulator_supply] = 1,
  63         [snd_soc_dapm_clock_supply] = 1,
  64         [snd_soc_dapm_supply] = 2,
  65         [snd_soc_dapm_micbias] = 3,
  66         [snd_soc_dapm_dai_link] = 2,
  67         [snd_soc_dapm_dai_in] = 4,
  68         [snd_soc_dapm_dai_out] = 4,
  69         [snd_soc_dapm_aif_in] = 4,
  70         [snd_soc_dapm_aif_out] = 4,
  71         [snd_soc_dapm_mic] = 5,
  72         [snd_soc_dapm_mux] = 6,
  73         [snd_soc_dapm_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,
  85 };
  86
  87 static int dapm_down_seq[] = {
  88         [snd_soc_dapm_pre] = 0,
  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,
  95         [snd_soc_dapm_pga] = 4,
  96         [snd_soc_dapm_switch] = 5,
  97         [snd_soc_dapm_mixer_named_ctl] = 5,
  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,
 103         [snd_soc_dapm_aif_in] = 10,
 104         [snd_soc_dapm_aif_out] = 10,
 105         [snd_soc_dapm_dai_in] = 10,
 106         [snd_soc_dapm_dai_out] = 10,
 107         [snd_soc_dapm_dai_link] = 11,
 108         [snd_soc_dapm_supply] = 12,
 109         [snd_soc_dapm_clock_supply] = 13,
 110         [snd_soc_dapm_regulator_supply] = 13,
 111         [snd_soc_dapm_post] = 14,
 112 };
 113
 114 static 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
 120 static void pop_wait(u32 pop_time)
 121 {
 122         if (pop_time)
 123                 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
 124 }
 125
 126 static void pop_dbg(struct device *dev, u32 pop_time, const char *fmt, ...)
 127 {
 128         va_list args;
 129         char *buf;
 130
 131         if (!pop_time)
 132                 return;
 133
 134         buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
 135         if (buf == NULL)
 136                 return;
 137
 138         va_start(args, fmt);
 139         vsnprintf(buf, PAGE_SIZE, fmt, args);
 140         dev_info(dev, "%s", buf);
 141         va_end(args);
 142
 143         kfree(buf);
 144 }
 145
 146 static bool dapm_dirty_widget(struct snd_soc_dapm_widget *w)
 147 {
 148         return !list_empty(&w->dirty);
 149 }
 150
 151 static void dapm_mark_dirty(struct snd_soc_dapm_widget *w, const char *reason)
 152 {
 153         dapm_assert_locked(w->dapm);
 154
 155         if (!dapm_dirty_widget(w)) {
 156                 dev_vdbg(w->dapm->dev, "Marking %s dirty due to %s\n",
 157                          w->name, reason);
 158                 list_add_tail(&w->dirty, &w->dapm->card->dapm_dirty);
 159         }
 160 }
 161
 162 void 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 }
 182 EXPORT_SYMBOL_GPL(dapm_mark_io_dirty);
 183
 184 /* create a new dapm widget */
 185 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
 186         const struct snd_soc_dapm_widget *_widget)
 187 {
 188         return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
 189 }
 190
 191 struct dapm_kcontrol_data {
 192         unsigned int value;
 193         struct snd_soc_dapm_widget *widget;
 194         struct list_head paths;
 195         struct snd_soc_dapm_widget_list *wlist;
 196 };
 197
 198 static int dapm_kcontrol_data_alloc(struct snd_soc_dapm_widget *widget,
 199         struct snd_kcontrol *kcontrol)
 200 {
 201         struct dapm_kcontrol_data *data;
 202         struct soc_mixer_control *mc;
 203
 204         data = kzalloc(sizeof(*data), GFP_KERNEL);
 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
 212         INIT_LIST_HEAD(&data->paths);
 213
 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
 235                         data->value = template.on_val;
 236
 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
 249         kcontrol->private_data = data;
 250
 251         return 0;
 252 }
 253
 254 static void dapm_kcontrol_free(struct snd_kcontrol *kctl)
 255 {
 256         struct dapm_kcontrol_data *data = snd_kcontrol_chip(kctl);
 257         kfree(data->widget);
 258         kfree(data->wlist);
 259         kfree(data);
 260 }
 261
 262 static struct snd_soc_dapm_widget_list *dapm_kcontrol_get_wlist(
 263         const struct snd_kcontrol *kcontrol)
 264 {
 265         struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
 266
 267         return data->wlist;
 268 }
 269
 270 static int dapm_kcontrol_add_widget(struct snd_kcontrol *kcontrol,
 271         struct snd_soc_dapm_widget *widget)
 272 {
 273         struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
 274         struct snd_soc_dapm_widget_list *new_wlist;
 275         unsigned int n;
 276
 277         if (data->wlist)
 278                 n = data->wlist->num_widgets + 1;
 279         else
 280                 n = 1;
 281
 282         new_wlist = krealloc(data->wlist,
 283                         sizeof(*new_wlist) + sizeof(widget) * n, GFP_KERNEL);
 284         if (!new_wlist)
 285                 return -ENOMEM;
 286
 287         new_wlist->widgets[n - 1] = widget;
 288         new_wlist->num_widgets = n;
 289
 290         data->wlist = new_wlist;
 291
 292         return 0;
 293 }
 294
 295 static void dapm_kcontrol_add_path(const struct snd_kcontrol *kcontrol,
 296         struct snd_soc_dapm_path *path)
 297 {
 298         struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
 299
 300         list_add_tail(&path->list_kcontrol, &data->paths);
 301
 302         if (data->widget) {
 303                 snd_soc_dapm_add_path(data->widget->dapm, data->widget,
 304                     path->source, NULL, NULL);
 305         }
 306 }
 307
 308 static bool dapm_kcontrol_is_powered(const struct snd_kcontrol *kcontrol)
 309 {
 310         struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
 311
 312         if (!data->widget)
 313                 return true;
 314
 315         return data->widget->power;
 316 }
 317
 318 static struct list_head *dapm_kcontrol_get_path_list(
 319         const struct snd_kcontrol *kcontrol)
 320 {
 321         struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
 322
 323         return &data->paths;
 324 }
 325
 326 #define dapm_kcontrol_for_each_path(path, kcontrol) \
 327         list_for_each_entry(path, dapm_kcontrol_get_path_list(kcontrol), \
 328                 list_kcontrol)
 329
 330 static unsigned int dapm_kcontrol_get_value(const struct snd_kcontrol *kcontrol)
 331 {
 332         struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
 333
 334         return data->value;
 335 }
 336
 337 static bool dapm_kcontrol_set_value(const struct snd_kcontrol *kcontrol,
 338         unsigned int value)
 339 {
 340         struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
 341
 342         if (data->value == value)
 343                 return false;
 344
 345         if (data->widget)
 346                 data->widget->on_val = value;
 347
 348         data->value = value;
 349
 350         return true;
 351 }
 352
 353 /**
 354  * snd_soc_dapm_kcontrol_codec() - Returns the codec associated to a kcontrol
 355  * @kcontrol: The kcontrol
 356  */
 357 struct snd_soc_codec *snd_soc_dapm_kcontrol_codec(struct snd_kcontrol *kcontrol)
 358 {
 359         return dapm_kcontrol_get_wlist(kcontrol)->widgets[0]->codec;
 360 }
 361 EXPORT_SYMBOL_GPL(snd_soc_dapm_kcontrol_codec);
 362
 363 static void dapm_reset(struct snd_soc_card *card)
 364 {
 365         struct snd_soc_dapm_widget *w;
 366
 367         lockdep_assert_held(&card->dapm_mutex);
 368
 369         memset(&card->dapm_stats, 0, sizeof(card->dapm_stats));
 370
 371         list_for_each_entry(w, &card->widgets, list) {
 372                 w->new_power = w->power;
 373                 w->power_checked = false;
 374                 w->inputs = -1;
 375                 w->outputs = -1;
 376         }
 377 }
 378
 379 static int soc_widget_read(struct snd_soc_dapm_widget *w, int reg,
 380         unsigned int *value)
 381 {
 382         if (w->codec) {
 383                 *value = snd_soc_read(w->codec, reg);
 384                 return 0;
 385         } else if (w->platform) {
 386                 *value = snd_soc_platform_read(w->platform, reg);
 387                 return 0;
 388         }
 389
 390         dev_err(w->dapm->dev, "ASoC: no valid widget read method\n");
 391         return -1;
 392 }
 393
 394 static int soc_widget_write(struct snd_soc_dapm_widget *w, int reg,
 395         unsigned int val)
 396 {
 397         if (w->codec)
 398                 return snd_soc_write(w->codec, reg, val);
 399         else if (w->platform)
 400                 return snd_soc_platform_write(w->platform, reg, val);
 401
 402         dev_err(w->dapm->dev, "ASoC: no valid widget write method\n");
 403         return -1;
 404 }
 405
 406 static inline void soc_widget_lock(struct snd_soc_dapm_widget *w)
 407 {
 408         if (w->codec && !w->codec->using_regmap)
 409                 mutex_lock(&w->codec->mutex);
 410         else if (w->platform)
 411                 mutex_lock(&w->platform->mutex);
 412 }
 413
 414 static inline void soc_widget_unlock(struct snd_soc_dapm_widget *w)
 415 {
 416         if (w->codec && !w->codec->using_regmap)
 417                 mutex_unlock(&w->codec->mutex);
 418         else if (w->platform)
 419                 mutex_unlock(&w->platform->mutex);
 420 }
 421
 422 static void soc_dapm_async_complete(struct snd_soc_dapm_context *dapm)
 423 {
 424         if (dapm->codec && dapm->codec->using_regmap)
 425                 regmap_async_complete(dapm->codec->control_data);
 426 }
 427
 428 static int soc_widget_update_bits_locked(struct snd_soc_dapm_widget *w,
 429         unsigned short reg, unsigned int mask, unsigned int value)
 430 {
 431         bool change;
 432         unsigned int old, new;
 433         int ret;
 434
 435         if (w->codec && w->codec->using_regmap) {
 436                 ret = regmap_update_bits_check_async(w->codec->control_data,
 437                                                      reg, mask, value,
 438                                                      &change);
 439                 if (ret != 0)
 440                         return ret;
 441         } else {
 442                 soc_widget_lock(w);
 443                 ret = soc_widget_read(w, reg, &old);
 444                 if (ret < 0) {
 445                         soc_widget_unlock(w);
 446                         return ret;
 447                 }
 448
 449                 new = (old & ~mask) | (value & mask);
 450                 change = old != new;
 451                 if (change) {
 452                         ret = soc_widget_write(w, reg, new);
 453                         if (ret < 0) {
 454                                 soc_widget_unlock(w);
 455                                 return ret;
 456                         }
 457                 }
 458                 soc_widget_unlock(w);
 459         }
 460
 461         return change;
 462 }
 463
 464 /**
 465  * snd_soc_dapm_set_bias_level - set the bias level for the system
 466  * @dapm: DAPM context
 467  * @level: level to configure
 468  *
 469  * Configure the bias (power) levels for the SoC audio device.
 470  *
 471  * Returns 0 for success else error.
 472  */
 473 static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm,
 474                                        enum snd_soc_bias_level level)
 475 {
 476         struct snd_soc_card *card = dapm->card;
 477         int ret = 0;
 478
 479         trace_snd_soc_bias_level_start(card, level);
 480
 481         if (card && card->set_bias_level)
 482                 ret = card->set_bias_level(card, dapm, level);
 483         if (ret != 0)
 484                 goto out;
 485
 486         if (dapm->codec) {
 487                 if (dapm->codec->driver->set_bias_level)
 488                         ret = dapm->codec->driver->set_bias_level(dapm->codec,
 489                                                                   level);
 490                 else
 491                         dapm->bias_level = level;
 492         } else if (!card || dapm != &card->dapm) {
 493                 dapm->bias_level = level;
 494         }
 495
 496         if (ret != 0)
 497                 goto out;
 498
 499         if (card && card->set_bias_level_post)
 500                 ret = card->set_bias_level_post(card, dapm, level);
 501 out:
 502         trace_snd_soc_bias_level_done(card, level);
 503
 504         return ret;
 505 }
 506
 507 /* connect mux widget to its interconnecting audio paths */
 508 static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
 509         struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
 510         struct snd_soc_dapm_path *path, const char *control_name,
 511         const struct snd_kcontrol_new *kcontrol)
 512 {
 513         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
 514         unsigned int val, item;
 515         int i;
 516
 517         if (e->reg != SND_SOC_NOPM) {
 518                 soc_widget_read(dest, e->reg, &val);
 519                 val = (val >> e->shift_l) & e->mask;
 520                 item = snd_soc_enum_val_to_item(e, val);
 521         } else {
 522                 /* since a virtual mux has no backing registers to
 523                  * decide which path to connect, it will try to match
 524                  * with the first enumeration.  This is to ensure
 525                  * that the default mux choice (the first) will be
 526                  * correctly powered up during initialization.
 527                  */
 528                 item = 0;
 529         }
 530
 531         for (i = 0; i < e->items; i++) {
 532                 if (!(strcmp(control_name, e->texts[i]))) {
 533                         list_add(&path->list, &dapm->card->paths);
 534                         list_add(&path->list_sink, &dest->sources);
 535                         list_add(&path->list_source, &src->sinks);
 536                         path->name = (char*)e->texts[i];
 537                         if (i == item)
 538                                 path->connect = 1;
 539                         else
 540                                 path->connect = 0;
 541                         return 0;
 542                 }
 543         }
 544
 545         return -ENODEV;
 546 }
 547
 548 /* set up initial codec paths */
 549 static void dapm_set_mixer_path_status(struct snd_soc_dapm_widget *w,
 550         struct snd_soc_dapm_path *p, int i)
 551 {
 552         struct soc_mixer_control *mc = (struct soc_mixer_control *)
 553                 w->kcontrol_news[i].private_value;
 554         unsigned int reg = mc->reg;
 555         unsigned int shift = mc->shift;
 556         unsigned int max = mc->max;
 557         unsigned int mask = (1 << fls(max)) - 1;
 558         unsigned int invert = mc->invert;
 559         unsigned int val;
 560
 561         if (reg != SND_SOC_NOPM) {
 562                 soc_widget_read(w, reg, &val);
 563                 val = (val >> shift) & mask;
 564                 if (invert)
 565                         val = max - val;
 566                 p->connect = !!val;
 567         } else {
 568                 p->connect = 0;
 569         }
 570 }
 571
 572 /* connect mixer widget to its interconnecting audio paths */
 573 static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
 574         struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
 575         struct snd_soc_dapm_path *path, const char *control_name)
 576 {
 577         int i;
 578
 579         /* search for mixer kcontrol */
 580         for (i = 0; i < dest->num_kcontrols; i++) {
 581                 if (!strcmp(control_name, dest->kcontrol_news[i].name)) {
 582                         list_add(&path->list, &dapm->card->paths);
 583                         list_add(&path->list_sink, &dest->sources);
 584                         list_add(&path->list_source, &src->sinks);
 585                         path->name = dest->kcontrol_news[i].name;
 586                         dapm_set_mixer_path_status(dest, path, i);
 587                         return 0;
 588                 }
 589         }
 590         return -ENODEV;
 591 }
 592
 593 static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm,
 594         struct snd_soc_dapm_widget *kcontrolw,
 595         const struct snd_kcontrol_new *kcontrol_new,
 596         struct snd_kcontrol **kcontrol)
 597 {
 598         struct snd_soc_dapm_widget *w;
 599         int i;
 600
 601         *kcontrol = NULL;
 602
 603         list_for_each_entry(w, &dapm->card->widgets, list) {
 604                 if (w == kcontrolw || w->dapm != kcontrolw->dapm)
 605                         continue;
 606                 for (i = 0; i < w->num_kcontrols; i++) {
 607                         if (&w->kcontrol_news[i] == kcontrol_new) {
 608                                 if (w->kcontrols)
 609                                         *kcontrol = w->kcontrols[i];
 610                                 return 1;
 611                         }
 612                 }
 613         }
 614
 615         return 0;
 616 }
 617
 618 /*
 619  * Determine if a kcontrol is shared. If it is, look it up. If it isn't,
 620  * create it. Either way, add the widget into the control's widget list
 621  */
 622 static int dapm_create_or_share_mixmux_kcontrol(struct snd_soc_dapm_widget *w,
 623         int kci)
 624 {
 625         struct snd_soc_dapm_context *dapm = w->dapm;
 626         struct snd_card *card = dapm->card->snd_card;
 627         const char *prefix;
 628         size_t prefix_len;
 629         int shared;
 630         struct snd_kcontrol *kcontrol;
 631         bool wname_in_long_name, kcname_in_long_name;
 632         char *long_name;
 633         const char *name;
 634         int ret;
 635
 636         if (dapm->codec)
 637                 prefix = dapm->codec->name_prefix;
 638         else
 639                 prefix = NULL;
 640
 641         if (prefix)
 642                 prefix_len = strlen(prefix) + 1;
 643         else
 644                 prefix_len = 0;
 645
 646         shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[kci],
 647                                          &kcontrol);
 648
 649         if (!kcontrol) {
 650                 if (shared) {
 651                         wname_in_long_name = false;
 652                         kcname_in_long_name = true;
 653                 } else {
 654                         switch (w->id) {
 655                         case snd_soc_dapm_switch:
 656                         case snd_soc_dapm_mixer:
 657                                 wname_in_long_name = true;
 658                                 kcname_in_long_name = true;
 659                                 break;
 660                         case snd_soc_dapm_mixer_named_ctl:
 661                                 wname_in_long_name = false;
 662                                 kcname_in_long_name = true;
 663                                 break;
 664                         case snd_soc_dapm_mux:
 665                                 wname_in_long_name = true;
 666                                 kcname_in_long_name = false;
 667                                 break;
 668                         default:
 669                                 return -EINVAL;
 670                         }
 671                 }
 672
 673                 if (wname_in_long_name && kcname_in_long_name) {
 674                         /*
 675                          * The control will get a prefix from the control
 676                          * creation process but we're also using the same
 677                          * prefix for widgets so cut the prefix off the
 678                          * front of the widget name.
 679                          */
 680                         long_name = kasprintf(GFP_KERNEL, "%s %s",
 681                                  w->name + prefix_len,
 682                                  w->kcontrol_news[kci].name);
 683                         if (long_name == NULL)
 684                                 return -ENOMEM;
 685
 686                         name = long_name;
 687                 } else if (wname_in_long_name) {
 688                         long_name = NULL;
 689                         name = w->name + prefix_len;
 690                 } else {
 691                         long_name = NULL;
 692                         name = w->kcontrol_news[kci].name;
 693                 }
 694
 695                 kcontrol = snd_soc_cnew(&w->kcontrol_news[kci], NULL, name,
 696                                         prefix);
 697                 kfree(long_name);
 698                 if (!kcontrol)
 699                         return -ENOMEM;
 700                 kcontrol->private_free = dapm_kcontrol_free;
 701
 702                 ret = dapm_kcontrol_data_alloc(w, kcontrol);
 703                 if (ret) {
 704                         snd_ctl_free_one(kcontrol);
 705                         return ret;
 706                 }
 707
 708                 ret = snd_ctl_add(card, kcontrol);
 709                 if (ret < 0) {
 710                         dev_err(dapm->dev,
 711                                 "ASoC: failed to add widget %s dapm kcontrol %s: %d\n",
 712                                 w->name, name, ret);
 713                         return ret;
 714                 }
 715         }
 716
 717         ret = dapm_kcontrol_add_widget(kcontrol, w);
 718         if (ret)
 719                 return ret;
 720
 721         w->kcontrols[kci] = kcontrol;
 722
 723         return 0;
 724 }
 725
 726 /* create new dapm mixer control */
 727 static int dapm_new_mixer(struct snd_soc_dapm_widget *w)
 728 {
 729         int i, ret;
 730         struct snd_soc_dapm_path *path;
 731
 732         /* add kcontrol */
 733         for (i = 0; i < w->num_kcontrols; i++) {
 734                 /* match name */
 735                 list_for_each_entry(path, &w->sources, list_sink) {
 736                         /* mixer/mux paths name must match control name */
 737                         if (path->name != (char *)w->kcontrol_news[i].name)
 738                                 continue;
 739
 740                         if (w->kcontrols[i]) {
 741                                 dapm_kcontrol_add_path(w->kcontrols[i], path);
 742                                 continue;
 743                         }
 744
 745                         ret = dapm_create_or_share_mixmux_kcontrol(w, i);
 746                         if (ret < 0)
 747                                 return ret;
 748
 749                         dapm_kcontrol_add_path(w->kcontrols[i], path);
 750                 }
 751         }
 752
 753         return 0;
 754 }
 755
 756 /* create new dapm mux control */
 757 static int dapm_new_mux(struct snd_soc_dapm_widget *w)
 758 {
 759         struct snd_soc_dapm_context *dapm = w->dapm;
 760         struct snd_soc_dapm_path *path;
 761         int ret;
 762
 763         if (w->num_kcontrols != 1) {
 764                 dev_err(dapm->dev,
 765                         "ASoC: mux %s has incorrect number of controls\n",
 766                         w->name);
 767                 return -EINVAL;
 768         }
 769
 770         if (list_empty(&w->sources)) {
 771                 dev_err(dapm->dev, "ASoC: mux %s has no paths\n", w->name);
 772                 return -EINVAL;
 773         }
 774
 775         ret = dapm_create_or_share_mixmux_kcontrol(w, 0);
 776         if (ret < 0)
 777                 return ret;
 778
 779         list_for_each_entry(path, &w->sources, list_sink)
 780                 dapm_kcontrol_add_path(w->kcontrols[0], path);
 781
 782         return 0;
 783 }
 784
 785 /* create new dapm volume control */
 786 static int dapm_new_pga(struct snd_soc_dapm_widget *w)
 787 {
 788         if (w->num_kcontrols)
 789                 dev_err(w->dapm->dev,
 790                         "ASoC: PGA controls not supported: '%s'\n", w->name);
 791
 792         return 0;
 793 }
 794
 795 /* reset 'walked' bit for each dapm path */
 796 static void dapm_clear_walk_output(struct snd_soc_dapm_context *dapm,
 797                                    struct list_head *sink)
 798 {
 799         struct snd_soc_dapm_path *p;
 800
 801         list_for_each_entry(p, sink, list_source) {
 802                 if (p->walked) {
 803                         p->walked = 0;
 804                         dapm_clear_walk_output(dapm, &p->sink->sinks);
 805                 }
 806         }
 807 }
 808
 809 static void dapm_clear_walk_input(struct snd_soc_dapm_context *dapm,
 810                                   struct list_head *source)
 811 {
 812         struct snd_soc_dapm_path *p;
 813
 814         list_for_each_entry(p, source, list_sink) {
 815                 if (p->walked) {
 816                         p->walked = 0;
 817                         dapm_clear_walk_input(dapm, &p->source->sources);
 818                 }
 819         }
 820 }
 821
 822
 823 /* We implement power down on suspend by checking the power state of
 824  * the ALSA card - when we are suspending the ALSA state for the card
 825  * is set to D3.
 826  */
 827 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
 828 {
 829         int level = snd_power_get_state(widget->dapm->card->snd_card);
 830
 831         switch (level) {
 832         case SNDRV_CTL_POWER_D3hot:
 833         case SNDRV_CTL_POWER_D3cold:
 834                 if (widget->ignore_suspend)
 835                         dev_dbg(widget->dapm->dev, "ASoC: %s ignoring suspend\n",
 836                                 widget->name);
 837                 return widget->ignore_suspend;
 838         default:
 839                 return 1;
 840         }
 841 }
 842
 843 /* add widget to list if it's not already in the list */
 844 static int dapm_list_add_widget(struct snd_soc_dapm_widget_list **list,
 845         struct snd_soc_dapm_widget *w)
 846 {
 847         struct snd_soc_dapm_widget_list *wlist;
 848         int wlistsize, wlistentries, i;
 849
 850         if (*list == NULL)
 851                 return -EINVAL;
 852
 853         wlist = *list;
 854
 855         /* is this widget already in the list */
 856         for (i = 0; i < wlist->num_widgets; i++) {
 857                 if (wlist->widgets[i] == w)
 858                         return 0;
 859         }
 860
 861         /* allocate some new space */
 862         wlistentries = wlist->num_widgets + 1;
 863         wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
 864                         wlistentries * sizeof(struct snd_soc_dapm_widget *);
 865         *list = krealloc(wlist, wlistsize, GFP_KERNEL);
 866         if (*list == NULL) {
 867                 dev_err(w->dapm->dev, "ASoC: can't allocate widget list for %s\n",
 868                         w->name);
 869                 return -ENOMEM;
 870         }
 871         wlist = *list;
 872
 873         /* insert the widget */
 874         dev_dbg(w->dapm->dev, "ASoC: added %s in widget list pos %d\n",
 875                         w->name, wlist->num_widgets);
 876
 877         wlist->widgets[wlist->num_widgets] = w;
 878         wlist->num_widgets++;
 879         return 1;
 880 }
 881
 882 /*
 883  * Recursively check for a completed path to an active or physically connected
 884  * output widget. Returns number of complete paths.
 885  */
 886 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget,
 887         struct snd_soc_dapm_widget_list **list)
 888 {
 889         struct snd_soc_dapm_path *path;
 890         int con = 0;
 891
 892         if (widget->outputs >= 0)
 893                 return widget->outputs;
 894
 895         DAPM_UPDATE_STAT(widget, path_checks);
 896
 897         switch (widget->id) {
 898         case snd_soc_dapm_supply:
 899         case snd_soc_dapm_regulator_supply:
 900         case snd_soc_dapm_clock_supply:
 901         case snd_soc_dapm_kcontrol:
 902                 return 0;
 903         default:
 904                 break;
 905         }
 906
 907         switch (widget->id) {
 908         case snd_soc_dapm_adc:
 909         case snd_soc_dapm_aif_out:
 910         case snd_soc_dapm_dai_out:
 911                 if (widget->active) {
 912                         widget->outputs = snd_soc_dapm_suspend_check(widget);
 913                         return widget->outputs;
 914                 }
 915         default:
 916                 break;
 917         }
 918
 919         if (widget->connected) {
 920                 /* connected pin ? */
 921                 if (widget->id == snd_soc_dapm_output && !widget->ext) {
 922                         widget->outputs = snd_soc_dapm_suspend_check(widget);
 923                         return widget->outputs;
 924                 }
 925
 926                 /* connected jack or spk ? */
 927                 if (widget->id == snd_soc_dapm_hp ||
 928                     widget->id == snd_soc_dapm_spk ||
 929                     (widget->id == snd_soc_dapm_line &&
 930                      !list_empty(&widget->sources))) {
 931                         widget->outputs = snd_soc_dapm_suspend_check(widget);
 932                         return widget->outputs;
 933                 }
 934         }
 935
 936         list_for_each_entry(path, &widget->sinks, list_source) {
 937                 DAPM_UPDATE_STAT(widget, neighbour_checks);
 938
 939                 if (path->weak)
 940                         continue;
 941
 942                 if (path->walking)
 943                         return 1;
 944
 945                 if (path->walked)
 946                         continue;
 947
 948                 trace_snd_soc_dapm_output_path(widget, path);
 949
 950                 if (path->sink && path->connect) {
 951                         path->walked = 1;
 952                         path->walking = 1;
 953
 954                         /* do we need to add this widget to the list ? */
 955                         if (list) {
 956                                 int err;
 957                                 err = dapm_list_add_widget(list, path->sink);
 958                                 if (err < 0) {
 959                                         dev_err(widget->dapm->dev,
 960                                                 "ASoC: could not add widget %s\n",
 961                                                 widget->name);
 962                                         path->walking = 0;
 963                                         return con;
 964                                 }
 965                         }
 966
 967                         con += is_connected_output_ep(path->sink, list);
 968
 969                         path->walking = 0;
 970                 }
 971         }
 972
 973         widget->outputs = con;
 974
 975         return con;
 976 }
 977
 978 /*
 979  * Recursively check for a completed path to an active or physically connected
 980  * input widget. Returns number of complete paths.
 981  */
 982 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget,
 983         struct snd_soc_dapm_widget_list **list)
 984 {
 985         struct snd_soc_dapm_path *path;
 986         int con = 0;
 987
 988         if (widget->inputs >= 0)
 989                 return widget->inputs;
 990
 991         DAPM_UPDATE_STAT(widget, path_checks);
 992
 993         switch (widget->id) {
 994         case snd_soc_dapm_supply:
 995         case snd_soc_dapm_regulator_supply:
 996         case snd_soc_dapm_clock_supply:
 997         case snd_soc_dapm_kcontrol:
 998                 return 0;
 999         default:
1000                 break;
1001         }
1002
1003         /* active stream ? */
1004         switch (widget->id) {
1005         case snd_soc_dapm_dac:
1006         case snd_soc_dapm_aif_in:
1007         case snd_soc_dapm_dai_in:
1008                 if (widget->active) {
1009                         widget->inputs = snd_soc_dapm_suspend_check(widget);
1010                         return widget->inputs;
1011                 }
1012         default:
1013                 break;
1014         }
1015
1016         if (widget->connected) {
1017                 /* connected pin ? */
1018                 if (widget->id == snd_soc_dapm_input && !widget->ext) {
1019                         widget->inputs = snd_soc_dapm_suspend_check(widget);
1020                         return widget->inputs;
1021                 }
1022
1023                 /* connected VMID/Bias for lower pops */
1024                 if (widget->id == snd_soc_dapm_vmid) {
1025                         widget->inputs = snd_soc_dapm_suspend_check(widget);
1026                         return widget->inputs;
1027                 }
1028
1029                 /* connected jack ? */
1030                 if (widget->id == snd_soc_dapm_mic ||
1031                     (widget->id == snd_soc_dapm_line &&
1032                      !list_empty(&widget->sinks))) {
1033                         widget->inputs = snd_soc_dapm_suspend_check(widget);
1034                         return widget->inputs;
1035                 }
1036
1037                 /* signal generator */
1038                 if (widget->id == snd_soc_dapm_siggen) {
1039                         widget->inputs = snd_soc_dapm_suspend_check(widget);
1040                         return widget->inputs;
1041                 }
1042         }
1043
1044         list_for_each_entry(path, &widget->sources, list_sink) {
1045                 DAPM_UPDATE_STAT(widget, neighbour_checks);
1046
1047                 if (path->weak)
1048                         continue;
1049
1050                 if (path->walking)
1051                         return 1;
1052
1053                 if (path->walked)
1054                         continue;
1055
1056                 trace_snd_soc_dapm_input_path(widget, path);
1057
1058                 if (path->source && path->connect) {
1059                         path->walked = 1;
1060                         path->walking = 1;
1061
1062                         /* do we need to add this widget to the list ? */
1063                         if (list) {
1064                                 int err;
1065                                 err = dapm_list_add_widget(list, path->source);
1066                                 if (err < 0) {
1067                                         dev_err(widget->dapm->dev,
1068                                                 "ASoC: could not add widget %s\n",
1069                                                 widget->name);
1070                                         path->walking = 0;
1071                                         return con;
1072                                 }
1073                         }
1074
1075                         con += is_connected_input_ep(path->source, list);
1076
1077                         path->walking = 0;
1078                 }
1079         }
1080
1081         widget->inputs = con;
1082
1083         return con;
1084 }
1085
1086 /**
1087  * snd_soc_dapm_get_connected_widgets - query audio path and it's widgets.
1088  * @dai: the soc DAI.
1089  * @stream: stream direction.
1090  * @list: list of active widgets for this stream.
1091  *
1092  * Queries DAPM graph as to whether an valid audio stream path exists for
1093  * the initial stream specified by name. This takes into account
1094  * current mixer and mux kcontrol settings. Creates list of valid widgets.
1095  *
1096  * Returns the number of valid paths or negative error.
1097  */
1098 int snd_soc_dapm_dai_get_connected_widgets(struct snd_soc_dai *dai, int stream,
1099         struct snd_soc_dapm_widget_list **list)
1100 {
1101         struct snd_soc_card *card = dai->card;
1102         int paths;
1103
1104         mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
1105         dapm_reset(card);
1106
1107         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1108                 paths = is_connected_output_ep(dai->playback_widget, list);
1109                 dapm_clear_walk_output(&card->dapm,
1110                                        &dai->playback_widget->sinks);
1111         } else {
1112                 paths = is_connected_input_ep(dai->capture_widget, list);
1113                 dapm_clear_walk_input(&card->dapm,
1114                                       &dai->capture_widget->sources);
1115         }
1116
1117         trace_snd_soc_dapm_connected(paths, stream);
1118         mutex_unlock(&card->dapm_mutex);
1119
1120         return paths;
1121 }
1122
1123 /*
1124  * Handler for generic register modifier widget.
1125  */
1126 int dapm_reg_event(struct snd_soc_dapm_widget *w,
1127                    struct snd_kcontrol *kcontrol, int event)
1128 {
1129         unsigned int val;
1130
1131         if (SND_SOC_DAPM_EVENT_ON(event))
1132                 val = w->on_val;
1133         else
1134                 val = w->off_val;
1135
1136         soc_widget_update_bits_locked(w, -(w->reg + 1),
1137                             w->mask << w->shift, val << w->shift);
1138
1139         return 0;
1140 }
1141 EXPORT_SYMBOL_GPL(dapm_reg_event);
1142
1143 /*
1144  * Handler for regulator supply widget.
1145  */
1146 int dapm_regulator_event(struct snd_soc_dapm_widget *w,
1147                    struct snd_kcontrol *kcontrol, int event)
1148 {
1149         int ret;
1150
1151         soc_dapm_async_complete(w->dapm);
1152
1153         if (SND_SOC_DAPM_EVENT_ON(event)) {
1154                 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
1155                         ret = regulator_allow_bypass(w->regulator, false);
1156                         if (ret != 0)
1157                                 dev_warn(w->dapm->dev,
1158                                          "ASoC: Failed to unbypass %s: %d\n",
1159                                          w->name, ret);
1160                 }
1161
1162                 return regulator_enable(w->regulator);
1163         } else {
1164                 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
1165                         ret = regulator_allow_bypass(w->regulator, true);
1166                         if (ret != 0)
1167                                 dev_warn(w->dapm->dev,
1168                                          "ASoC: Failed to bypass %s: %d\n",
1169                                          w->name, ret);
1170                 }
1171
1172                 return regulator_disable_deferred(w->regulator, w->shift);
1173         }
1174 }
1175 EXPORT_SYMBOL_GPL(dapm_regulator_event);
1176
1177 /*
1178  * Handler for clock supply widget.
1179  */
1180 int dapm_clock_event(struct snd_soc_dapm_widget *w,
1181                    struct snd_kcontrol *kcontrol, int event)
1182 {
1183         if (!w->clk)
1184                 return -EIO;
1185
1186         soc_dapm_async_complete(w->dapm);
1187
1188 #ifdef CONFIG_HAVE_CLK
1189         if (SND_SOC_DAPM_EVENT_ON(event)) {
1190                 return clk_prepare_enable(w->clk);
1191         } else {
1192                 clk_disable_unprepare(w->clk);
1193                 return 0;
1194         }
1195 #endif
1196         return 0;
1197 }
1198 EXPORT_SYMBOL_GPL(dapm_clock_event);
1199
1200 static int dapm_widget_power_check(struct snd_soc_dapm_widget *w)
1201 {
1202         if (w->power_checked)
1203                 return w->new_power;
1204
1205         if (w->force)
1206                 w->new_power = 1;
1207         else
1208                 w->new_power = w->power_check(w);
1209
1210         w->power_checked = true;
1211
1212         return w->new_power;
1213 }
1214
1215 /* Generic check to see if a widget should be powered.
1216  */
1217 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
1218 {
1219         int in, out;
1220
1221         DAPM_UPDATE_STAT(w, power_checks);
1222
1223         in = is_connected_input_ep(w, NULL);
1224         dapm_clear_walk_input(w->dapm, &w->sources);
1225         out = is_connected_output_ep(w, NULL);
1226         dapm_clear_walk_output(w->dapm, &w->sinks);
1227         return out != 0 && in != 0;
1228 }
1229
1230 /* Check to see if an ADC has power */
1231 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
1232 {
1233         int in;
1234
1235         DAPM_UPDATE_STAT(w, power_checks);
1236
1237         if (w->active) {
1238                 in = is_connected_input_ep(w, NULL);
1239                 dapm_clear_walk_input(w->dapm, &w->sources);
1240                 return in != 0;
1241         } else {
1242                 return dapm_generic_check_power(w);
1243         }
1244 }
1245
1246 /* Check to see if a DAC has power */
1247 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
1248 {
1249         int out;
1250
1251         DAPM_UPDATE_STAT(w, power_checks);
1252
1253         if (w->active) {
1254                 out = is_connected_output_ep(w, NULL);
1255                 dapm_clear_walk_output(w->dapm, &w->sinks);
1256                 return out != 0;
1257         } else {
1258                 return dapm_generic_check_power(w);
1259         }
1260 }
1261
1262 /* Check to see if a power supply is needed */
1263 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
1264 {
1265         struct snd_soc_dapm_path *path;
1266
1267         DAPM_UPDATE_STAT(w, power_checks);
1268
1269         /* Check if one of our outputs is connected */
1270         list_for_each_entry(path, &w->sinks, list_source) {
1271                 DAPM_UPDATE_STAT(w, neighbour_checks);
1272
1273                 if (path->weak)
1274                         continue;
1275
1276                 if (path->connected &&
1277                     !path->connected(path->source, path->sink))
1278                         continue;
1279
1280                 if (!path->sink)
1281                         continue;
1282
1283                 if (dapm_widget_power_check(path->sink))
1284                         return 1;
1285         }
1286
1287         return 0;
1288 }
1289
1290 static int dapm_always_on_check_power(struct snd_soc_dapm_widget *w)
1291 {
1292         return 1;
1293 }
1294
1295 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
1296                             struct snd_soc_dapm_widget *b,
1297                             bool power_up)
1298 {
1299         int *sort;
1300
1301         if (power_up)
1302                 sort = dapm_up_seq;
1303         else
1304                 sort = dapm_down_seq;
1305
1306         if (sort[a->id] != sort[b->id])
1307                 return sort[a->id] - sort[b->id];
1308         if (a->subseq != b->subseq) {
1309                 if (power_up)
1310                         return a->subseq - b->subseq;
1311                 else
1312                         return b->subseq - a->subseq;
1313         }
1314         if (a->reg != b->reg)
1315                 return a->reg - b->reg;
1316         if (a->dapm != b->dapm)
1317                 return (unsigned long)a->dapm - (unsigned long)b->dapm;
1318
1319         return 0;
1320 }
1321
1322 /* Insert a widget in order into a DAPM power sequence. */
1323 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
1324                             struct list_head *list,
1325                             bool power_up)
1326 {
1327         struct snd_soc_dapm_widget *w;
1328
1329         list_for_each_entry(w, list, power_list)
1330                 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
1331                         list_add_tail(&new_widget->power_list, &w->power_list);
1332                         return;
1333                 }
1334
1335         list_add_tail(&new_widget->power_list, list);
1336 }
1337
1338 static void dapm_seq_check_event(struct snd_soc_card *card,
1339                                  struct snd_soc_dapm_widget *w, int event)
1340 {
1341         const char *ev_name;
1342         int power, ret;
1343
1344         switch (event) {
1345         case SND_SOC_DAPM_PRE_PMU:
1346                 ev_name = "PRE_PMU";
1347                 power = 1;
1348                 break;
1349         case SND_SOC_DAPM_POST_PMU:
1350                 ev_name = "POST_PMU";
1351                 power = 1;
1352                 break;
1353         case SND_SOC_DAPM_PRE_PMD:
1354                 ev_name = "PRE_PMD";
1355                 power = 0;
1356                 break;
1357         case SND_SOC_DAPM_POST_PMD:
1358                 ev_name = "POST_PMD";
1359                 power = 0;
1360                 break;
1361         case SND_SOC_DAPM_WILL_PMU:
1362                 ev_name = "WILL_PMU";
1363                 power = 1;
1364                 break;
1365         case SND_SOC_DAPM_WILL_PMD:
1366                 ev_name = "WILL_PMD";
1367                 power = 0;
1368                 break;
1369         default:
1370                 WARN(1, "Unknown event %d\n", event);
1371                 return;
1372         }
1373
1374         if (w->new_power != power)
1375                 return;
1376
1377         if (w->event && (w->event_flags & event)) {
1378                 pop_dbg(w->dapm->dev, card->pop_time, "pop test : %s %s\n",
1379                         w->name, ev_name);
1380                 soc_dapm_async_complete(w->dapm);
1381                 trace_snd_soc_dapm_widget_event_start(w, event);
1382                 ret = w->event(w, NULL, event);
1383                 trace_snd_soc_dapm_widget_event_done(w, event);
1384                 if (ret < 0)
1385                         dev_err(w->dapm->dev, "ASoC: %s: %s event failed: %d\n",
1386                                ev_name, w->name, ret);
1387         }
1388 }
1389
1390 /* Apply the coalesced changes from a DAPM sequence */
1391 static void dapm_seq_run_coalesced(struct snd_soc_card *card,
1392                                    struct list_head *pending)
1393 {
1394         struct snd_soc_dapm_widget *w;
1395         int reg;
1396         unsigned int value = 0;
1397         unsigned int mask = 0;
1398
1399         reg = list_first_entry(pending, struct snd_soc_dapm_widget,
1400                                power_list)->reg;
1401
1402         list_for_each_entry(w, pending, power_list) {
1403                 WARN_ON(reg != w->reg);
1404                 w->power = w->new_power;
1405
1406                 mask |= w->mask << w->shift;
1407                 if (w->power)
1408                         value |= w->on_val << w->shift;
1409                 else
1410                         value |= w->off_val << w->shift;
1411
1412                 pop_dbg(w->dapm->dev, card->pop_time,
1413                         "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
1414                         w->name, reg, value, mask);
1415
1416                 /* Check for events */
1417                 dapm_seq_check_event(card, w, SND_SOC_DAPM_PRE_PMU);
1418                 dapm_seq_check_event(card, w, SND_SOC_DAPM_PRE_PMD);
1419         }
1420
1421         if (reg >= 0) {
1422                 /* Any widget will do, they should all be updating the
1423                  * same register.
1424                  */
1425                 w = list_first_entry(pending, struct snd_soc_dapm_widget,
1426                                      power_list);
1427
1428                 pop_dbg(w->dapm->dev, card->pop_time,
1429                         "pop test : Applying 0x%x/0x%x to %x in %dms\n",
1430                         value, mask, reg, card->pop_time);
1431                 pop_wait(card->pop_time);
1432                 soc_widget_update_bits_locked(w, reg, mask, value);
1433         }
1434
1435         list_for_each_entry(w, pending, power_list) {
1436                 dapm_seq_check_event(card, w, SND_SOC_DAPM_POST_PMU);
1437                 dapm_seq_check_event(card, w, SND_SOC_DAPM_POST_PMD);
1438         }
1439 }
1440
1441 /* Apply a DAPM power sequence.
1442  *
1443  * We walk over a pre-sorted list of widgets to apply power to.  In
1444  * order to minimise the number of writes to the device required
1445  * multiple widgets will be updated in a single write where possible.
1446  * Currently anything that requires more than a single write is not
1447  * handled.
1448  */
1449 static void dapm_seq_run(struct snd_soc_card *card,
1450         struct list_head *list, int event, bool power_up)
1451 {
1452         struct snd_soc_dapm_widget *w, *n;
1453         struct snd_soc_dapm_context *d;
1454         LIST_HEAD(pending);
1455         int cur_sort = -1;
1456         int cur_subseq = -1;
1457         int cur_reg = SND_SOC_NOPM;
1458         struct snd_soc_dapm_context *cur_dapm = NULL;
1459         int ret, i;
1460         int *sort;
1461
1462         if (power_up)
1463                 sort = dapm_up_seq;
1464         else
1465                 sort = dapm_down_seq;
1466
1467         list_for_each_entry_safe(w, n, list, power_list) {
1468                 ret = 0;
1469
1470                 /* Do we need to apply any queued changes? */
1471                 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
1472                     w->dapm != cur_dapm || w->subseq != cur_subseq) {
1473                         if (!list_empty(&pending))
1474                                 dapm_seq_run_coalesced(card, &pending);
1475
1476                         if (cur_dapm && cur_dapm->seq_notifier) {
1477                                 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1478                                         if (sort[i] == cur_sort)
1479                                                 cur_dapm->seq_notifier(cur_dapm,
1480                                                                        i,
1481                                                                        cur_subseq);
1482                         }
1483
1484                         if (cur_dapm && w->dapm != cur_dapm)
1485                                 soc_dapm_async_complete(cur_dapm);
1486
1487                         INIT_LIST_HEAD(&pending);
1488                         cur_sort = -1;
1489                         cur_subseq = INT_MIN;
1490                         cur_reg = SND_SOC_NOPM;
1491                         cur_dapm = NULL;
1492                 }
1493
1494                 switch (w->id) {
1495                 case snd_soc_dapm_pre:
1496                         if (!w->event)
1497                                 list_for_each_entry_safe_continue(w, n, list,
1498                                                                   power_list);
1499
1500                         if (event == SND_SOC_DAPM_STREAM_START)
1501                                 ret = w->event(w,
1502                                                NULL, SND_SOC_DAPM_PRE_PMU);
1503                         else if (event == SND_SOC_DAPM_STREAM_STOP)
1504                                 ret = w->event(w,
1505                                                NULL, SND_SOC_DAPM_PRE_PMD);
1506                         break;
1507
1508                 case snd_soc_dapm_post:
1509                         if (!w->event)
1510                                 list_for_each_entry_safe_continue(w, n, list,
1511                                                                   power_list);
1512
1513                         if (event == SND_SOC_DAPM_STREAM_START)
1514                                 ret = w->event(w,
1515                                                NULL, SND_SOC_DAPM_POST_PMU);
1516                         else if (event == SND_SOC_DAPM_STREAM_STOP)
1517                                 ret = w->event(w,
1518                                                NULL, SND_SOC_DAPM_POST_PMD);
1519                         break;
1520
1521                 default:
1522                         /* Queue it up for application */
1523                         cur_sort = sort[w->id];
1524                         cur_subseq = w->subseq;
1525                         cur_reg = w->reg;
1526                         cur_dapm = w->dapm;
1527                         list_move(&w->power_list, &pending);
1528                         break;
1529                 }
1530
1531                 if (ret < 0)
1532                         dev_err(w->dapm->dev,
1533                                 "ASoC: Failed to apply widget power: %d\n", ret);
1534         }
1535
1536         if (!list_empty(&pending))
1537                 dapm_seq_run_coalesced(card, &pending);
1538
1539         if (cur_dapm && cur_dapm->seq_notifier) {
1540                 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1541                         if (sort[i] == cur_sort)
1542                                 cur_dapm->seq_notifier(cur_dapm,
1543                                                        i, cur_subseq);
1544         }
1545
1546         list_for_each_entry(d, &card->dapm_list, list) {
1547                 soc_dapm_async_complete(d);
1548         }
1549 }
1550
1551 static void dapm_widget_update(struct snd_soc_card *card)
1552 {
1553         struct snd_soc_dapm_update *update = card->update;
1554         struct snd_soc_dapm_widget_list *wlist;
1555         struct snd_soc_dapm_widget *w = NULL;
1556         unsigned int wi;
1557         int ret;
1558
1559         if (!update || !dapm_kcontrol_is_powered(update->kcontrol))
1560                 return;
1561
1562         wlist = dapm_kcontrol_get_wlist(update->kcontrol);
1563
1564         for (wi = 0; wi < wlist->num_widgets; wi++) {
1565                 w = wlist->widgets[wi];
1566
1567                 if (w->event && (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
1568                         ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
1569                         if (ret != 0)
1570                                 dev_err(w->dapm->dev, "ASoC: %s DAPM pre-event failed: %d\n",
1571                                            w->name, ret);
1572                 }
1573         }
1574
1575         if (!w)
1576                 return;
1577
1578         ret = soc_widget_update_bits_locked(w, update->reg, update->mask,
1579                                   update->val);
1580         if (ret < 0)
1581                 dev_err(w->dapm->dev, "ASoC: %s DAPM update failed: %d\n",
1582                         w->name, ret);
1583
1584         for (wi = 0; wi < wlist->num_widgets; wi++) {
1585                 w = wlist->widgets[wi];
1586
1587                 if (w->event && (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1588                         ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1589                         if (ret != 0)
1590                                 dev_err(w->dapm->dev, "ASoC: %s DAPM post-event failed: %d\n",
1591                                            w->name, ret);
1592                 }
1593         }
1594 }
1595
1596 /* Async callback run prior to DAPM sequences - brings to _PREPARE if
1597  * they're changing state.
1598  */
1599 static void dapm_pre_sequence_async(void *data, async_cookie_t cookie)
1600 {
1601         struct snd_soc_dapm_context *d = data;
1602         int ret;
1603
1604         /* If we're off and we're not supposed to be go into STANDBY */
1605         if (d->bias_level == SND_SOC_BIAS_OFF &&
1606             d->target_bias_level != SND_SOC_BIAS_OFF) {
1607                 if (d->dev)
1608                         pm_runtime_get_sync(d->dev);
1609
1610                 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1611                 if (ret != 0)
1612                         dev_err(d->dev,
1613                                 "ASoC: Failed to turn on bias: %d\n", ret);
1614         }
1615
1616         /* Prepare for a STADDBY->ON or ON->STANDBY transition */
1617         if (d->bias_level != d->target_bias_level) {
1618                 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);
1619                 if (ret != 0)
1620                         dev_err(d->dev,
1621                                 "ASoC: Failed to prepare bias: %d\n", ret);
1622         }
1623 }
1624
1625 /* Async callback run prior to DAPM sequences - brings to their final
1626  * state.
1627  */
1628 static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
1629 {
1630         struct snd_soc_dapm_context *d = data;
1631         int ret;
1632
1633         /* If we just powered the last thing off drop to standby bias */
1634         if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1635             (d->target_bias_level == SND_SOC_BIAS_STANDBY ||
1636              d->target_bias_level == SND_SOC_BIAS_OFF)) {
1637                 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1638                 if (ret != 0)
1639                         dev_err(d->dev, "ASoC: Failed to apply standby bias: %d\n",
1640                                 ret);
1641         }
1642
1643         /* If we're in standby and can support bias off then do that */
1644         if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1645             d->target_bias_level == SND_SOC_BIAS_OFF) {
1646                 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);
1647                 if (ret != 0)
1648                         dev_err(d->dev, "ASoC: Failed to turn off bias: %d\n",
1649                                 ret);
1650
1651                 if (d->dev)
1652                         pm_runtime_put(d->dev);
1653         }
1654
1655         /* If we just powered up then move to active bias */
1656         if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1657             d->target_bias_level == SND_SOC_BIAS_ON) {
1658                 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);
1659                 if (ret != 0)
1660                         dev_err(d->dev, "ASoC: Failed to apply active bias: %d\n",
1661                                 ret);
1662         }
1663 }
1664
1665 static void dapm_widget_set_peer_power(struct snd_soc_dapm_widget *peer,
1666                                        bool power, bool connect)
1667 {
1668         /* If a connection is being made or broken then that update
1669          * will have marked the peer dirty, otherwise the widgets are
1670          * not connected and this update has no impact. */
1671         if (!connect)
1672                 return;
1673
1674         /* If the peer is already in the state we're moving to then we
1675          * won't have an impact on it. */
1676         if (power != peer->power)
1677                 dapm_mark_dirty(peer, "peer state change");
1678 }
1679
1680 static void dapm_widget_set_power(struct snd_soc_dapm_widget *w, bool power,
1681                                   struct list_head *up_list,
1682                                   struct list_head *down_list)
1683 {
1684         struct snd_soc_dapm_path *path;
1685
1686         if (w->power == power)
1687                 return;
1688
1689         trace_snd_soc_dapm_widget_power(w, power);
1690
1691         /* If we changed our power state perhaps our neigbours changed
1692          * also.
1693          */
1694         list_for_each_entry(path, &w->sources, list_sink) {
1695                 if (path->source) {
1696                         dapm_widget_set_peer_power(path->source, power,
1697                                                    path->connect);
1698                 }
1699         }
1700         switch (w->id) {
1701         case snd_soc_dapm_supply:
1702         case snd_soc_dapm_regulator_supply:
1703         case snd_soc_dapm_clock_supply:
1704         case snd_soc_dapm_kcontrol:
1705                 /* Supplies can't affect their outputs, only their inputs */
1706                 break;
1707         default:
1708                 list_for_each_entry(path, &w->sinks, list_source) {
1709                         if (path->sink) {
1710                                 dapm_widget_set_peer_power(path->sink, power,
1711                                                            path->connect);
1712                         }
1713                 }
1714                 break;
1715         }
1716
1717         if (power)
1718                 dapm_seq_insert(w, up_list, true);
1719         else
1720                 dapm_seq_insert(w, down_list, false);
1721 }
1722
1723 static void dapm_power_one_widget(struct snd_soc_dapm_widget *w,
1724                                   struct list_head *up_list,
1725                                   struct list_head *down_list)
1726 {
1727         int power;
1728
1729         switch (w->id) {
1730         case snd_soc_dapm_pre:
1731                 dapm_seq_insert(w, down_list, false);
1732                 break;
1733         case snd_soc_dapm_post:
1734                 dapm_seq_insert(w, up_list, true);
1735                 break;
1736
1737         default:
1738                 power = dapm_widget_power_check(w);
1739
1740                 dapm_widget_set_power(w, power, up_list, down_list);
1741                 break;
1742         }
1743 }
1744
1745 /*
1746  * Scan each dapm widget for complete audio path.
1747  * A complete path is a route that has valid endpoints i.e.:-
1748  *
1749  *  o DAC to output pin.
1750  *  o Input Pin to ADC.
1751  *  o Input pin to Output pin (bypass, sidetone)
1752  *  o DAC to ADC (loopback).
1753  */
1754 static int dapm_power_widgets(struct snd_soc_card *card, int event)
1755 {
1756         struct snd_soc_dapm_widget *w;
1757         struct snd_soc_dapm_context *d;
1758         LIST_HEAD(up_list);
1759         LIST_HEAD(down_list);
1760         ASYNC_DOMAIN_EXCLUSIVE(async_domain);
1761         enum snd_soc_bias_level bias;
1762
1763         lockdep_assert_held(&card->dapm_mutex);
1764
1765         trace_snd_soc_dapm_start(card);
1766
1767         list_for_each_entry(d, &card->dapm_list, list) {
1768                 if (d->idle_bias_off)
1769                         d->target_bias_level = SND_SOC_BIAS_OFF;
1770                 else
1771                         d->target_bias_level = SND_SOC_BIAS_STANDBY;
1772         }
1773
1774         dapm_reset(card);
1775
1776         /* Check which widgets we need to power and store them in
1777          * lists indicating if they should be powered up or down.  We
1778          * only check widgets that have been flagged as dirty but note
1779          * that new widgets may be added to the dirty list while we
1780          * iterate.
1781          */
1782         list_for_each_entry(w, &card->dapm_dirty, dirty) {
1783                 dapm_power_one_widget(w, &up_list, &down_list);
1784         }
1785
1786         list_for_each_entry(w, &card->widgets, list) {
1787                 switch (w->id) {
1788                 case snd_soc_dapm_pre:
1789                 case snd_soc_dapm_post:
1790                         /* These widgets always need to be powered */
1791                         break;
1792                 default:
1793                         list_del_init(&w->dirty);
1794                         break;
1795                 }
1796
1797                 if (w->new_power) {
1798                         d = w->dapm;
1799
1800                         /* Supplies and micbiases only bring the
1801                          * context up to STANDBY as unless something
1802                          * else is active and passing audio they
1803                          * generally don't require full power.  Signal
1804                          * generators are virtual pins and have no
1805                          * power impact themselves.
1806                          */
1807                         switch (w->id) {
1808                         case snd_soc_dapm_siggen:
1809                         case snd_soc_dapm_vmid:
1810                                 break;
1811                         case snd_soc_dapm_supply:
1812                         case snd_soc_dapm_regulator_supply:
1813                         case snd_soc_dapm_clock_supply:
1814                         case snd_soc_dapm_micbias:
1815                                 if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
1816                                         d->target_bias_level = SND_SOC_BIAS_STANDBY;
1817                                 break;
1818                         default:
1819                                 d->target_bias_level = SND_SOC_BIAS_ON;
1820                                 break;
1821                         }
1822                 }
1823
1824         }
1825
1826         /* Force all contexts in the card to the same bias state if
1827          * they're not ground referenced.
1828          */
1829         bias = SND_SOC_BIAS_OFF;
1830         list_for_each_entry(d, &card->dapm_list, list)
1831                 if (d->target_bias_level > bias)
1832                         bias = d->target_bias_level;
1833         list_for_each_entry(d, &card->dapm_list, list)
1834                 if (!d->idle_bias_off)
1835                         d->target_bias_level = bias;
1836
1837         trace_snd_soc_dapm_walk_done(card);
1838
1839         /* Run card bias changes at first */
1840         dapm_pre_sequence_async(&card->dapm, 0);
1841         /* Run other bias changes in parallel */
1842         list_for_each_entry(d, &card->dapm_list, list) {
1843                 if (d != &card->dapm)
1844                         async_schedule_domain(dapm_pre_sequence_async, d,
1845                                                 &async_domain);
1846         }
1847         async_synchronize_full_domain(&async_domain);
1848
1849         list_for_each_entry(w, &down_list, power_list) {
1850                 dapm_seq_check_event(card, w, SND_SOC_DAPM_WILL_PMD);
1851         }
1852
1853         list_for_each_entry(w, &up_list, power_list) {
1854                 dapm_seq_check_event(card, w, SND_SOC_DAPM_WILL_PMU);
1855         }
1856
1857         /* Power down widgets first; try to avoid amplifying pops. */
1858         dapm_seq_run(card, &down_list, event, false);
1859
1860         dapm_widget_update(card);
1861
1862         /* Now power up. */
1863         dapm_seq_run(card, &up_list, event, true);
1864
1865         /* Run all the bias changes in parallel */
1866         list_for_each_entry(d, &card->dapm_list, list) {
1867                 if (d != &card->dapm)
1868                         async_schedule_domain(dapm_post_sequence_async, d,
1869                                                 &async_domain);
1870         }
1871         async_synchronize_full_domain(&async_domain);
1872         /* Run card bias changes at last */
1873         dapm_post_sequence_async(&card->dapm, 0);
1874
1875         /* do we need to notify any clients that DAPM event is complete */
1876         list_for_each_entry(d, &card->dapm_list, list) {
1877                 if (d->stream_event)
1878                         d->stream_event(d, event);
1879         }
1880
1881         pop_dbg(card->dev, card->pop_time,
1882                 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
1883         pop_wait(card->pop_time);
1884
1885         trace_snd_soc_dapm_done(card);
1886
1887         return 0;
1888 }
1889
1890 #ifdef CONFIG_DEBUG_FS
1891 static ssize_t dapm_widget_power_read_file(struct file *file,
1892                                            char __user *user_buf,
1893                                            size_t count, loff_t *ppos)
1894 {
1895         struct snd_soc_dapm_widget *w = file->private_data;
1896         char *buf;
1897         int in, out;
1898         ssize_t ret;
1899         struct snd_soc_dapm_path *p = NULL;
1900
1901         buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1902         if (!buf)
1903                 return -ENOMEM;
1904
1905         in = is_connected_input_ep(w, NULL);
1906         dapm_clear_walk_input(w->dapm, &w->sources);
1907         out = is_connected_output_ep(w, NULL);
1908         dapm_clear_walk_output(w->dapm, &w->sinks);
1909
1910         ret = snprintf(buf, PAGE_SIZE, "%s: %s%s  in %d out %d",
1911                        w->name, w->power ? "On" : "Off",
1912                        w->force ? " (forced)" : "", in, out);
1913
1914         if (w->reg >= 0)
1915                 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1916                                 " - R%d(0x%x) mask 0x%x",
1917                                 w->reg, w->reg, w->mask << w->shift);
1918
1919         ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1920
1921         if (w->sname)
1922                 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1923                                 w->sname,
1924                                 w->active ? "active" : "inactive");
1925
1926         list_for_each_entry(p, &w->sources, list_sink) {
1927                 if (p->connected && !p->connected(w, p->source))
1928                         continue;
1929
1930                 if (p->connect)
1931                         ret += snprintf(buf + ret, PAGE_SIZE - ret,
1932                                         " in  \"%s\" \"%s\"\n",
1933                                         p->name ? p->name : "static",
1934                                         p->source->name);
1935         }
1936         list_for_each_entry(p, &w->sinks, list_source) {
1937                 if (p->connected && !p->connected(w, p->sink))
1938                         continue;
1939
1940                 if (p->connect)
1941                         ret += snprintf(buf + ret, PAGE_SIZE - ret,
1942                                         " out \"%s\" \"%s\"\n",
1943                                         p->name ? p->name : "static",
1944                                         p->sink->name);
1945         }
1946
1947         ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1948
1949         kfree(buf);
1950         return ret;
1951 }
1952
1953 static const struct file_operations dapm_widget_power_fops = {
1954         .open = simple_open,
1955         .read = dapm_widget_power_read_file,
1956         .llseek = default_llseek,
1957 };
1958
1959 static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
1960                                    size_t count, loff_t *ppos)
1961 {
1962         struct snd_soc_dapm_context *dapm = file->private_data;
1963         char *level;
1964
1965         switch (dapm->bias_level) {
1966         case SND_SOC_BIAS_ON:
1967                 level = "On\n";
1968                 break;
1969         case SND_SOC_BIAS_PREPARE:
1970                 level = "Prepare\n";
1971                 break;
1972         case SND_SOC_BIAS_STANDBY:
1973                 level = "Standby\n";
1974                 break;
1975         case SND_SOC_BIAS_OFF:
1976                 level = "Off\n";
1977                 break;
1978         default:
1979                 WARN(1, "Unknown bias_level %d\n", dapm->bias_level);
1980                 level = "Unknown\n";
1981                 break;
1982         }
1983
1984         return simple_read_from_buffer(user_buf, count, ppos, level,
1985                                        strlen(level));
1986 }
1987
1988 static const struct file_operations dapm_bias_fops = {
1989         .open = simple_open,
1990         .read = dapm_bias_read_file,
1991         .llseek = default_llseek,
1992 };
1993
1994 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1995         struct dentry *parent)
1996 {
1997         struct dentry *d;
1998
1999         dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
2000
2001         if (!dapm->debugfs_dapm) {
2002                 dev_warn(dapm->dev,
2003                        "ASoC: Failed to create DAPM debugfs directory\n");
2004                 return;
2005         }
2006
2007         d = debugfs_create_file("bias_level", 0444,
2008                                 dapm->debugfs_dapm, dapm,
2009                                 &dapm_bias_fops);
2010         if (!d)
2011                 dev_warn(dapm->dev,
2012                          "ASoC: Failed to create bias level debugfs file\n");
2013 }
2014
2015 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
2016 {
2017         struct snd_soc_dapm_context *dapm = w->dapm;
2018         struct dentry *d;
2019
2020         if (!dapm->debugfs_dapm || !w->name)
2021                 return;
2022
2023         d = debugfs_create_file(w->name, 0444,
2024                                 dapm->debugfs_dapm, w,
2025                                 &dapm_widget_power_fops);
2026         if (!d)
2027                 dev_warn(w->dapm->dev,
2028                         "ASoC: Failed to create %s debugfs file\n",
2029                         w->name);
2030 }
2031
2032 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
2033 {
2034         debugfs_remove_recursive(dapm->debugfs_dapm);
2035 }
2036
2037 #else
2038 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
2039         struct dentry *parent)
2040 {
2041 }
2042
2043 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
2044 {
2045 }
2046
2047 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
2048 {
2049 }
2050
2051 #endif
2052
2053 /* test and update the power status of a mux widget */
2054 static int soc_dapm_mux_update_power(struct snd_soc_card *card,
2055                                  struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e)
2056 {
2057         struct snd_soc_dapm_path *path;
2058         int found = 0;
2059
2060         lockdep_assert_held(&card->dapm_mutex);
2061
2062         /* find dapm widget path assoc with kcontrol */
2063         dapm_kcontrol_for_each_path(path, kcontrol) {
2064                 if (!path->name || !e->texts[mux])
2065                         continue;
2066
2067                 found = 1;
2068                 /* we now need to match the string in the enum to the path */
2069                 if (!(strcmp(path->name, e->texts[mux]))) {
2070                         path->connect = 1; /* new connection */
2071                         dapm_mark_dirty(path->source, "mux connection");
2072                 } else {
2073                         if (path->connect)
2074                                 dapm_mark_dirty(path->source,
2075                                                 "mux disconnection");
2076                         path->connect = 0; /* old connection must be powered down */
2077                 }
2078                 dapm_mark_dirty(path->sink, "mux change");
2079         }
2080
2081         if (found)
2082                 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2083
2084         return found;
2085 }
2086
2087 int snd_soc_dapm_mux_update_power(struct snd_soc_dapm_context *dapm,
2088         struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e,
2089         struct snd_soc_dapm_update *update)
2090 {
2091         struct snd_soc_card *card = dapm->card;
2092         int ret;
2093
2094         mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2095         card->update = update;
2096         ret = soc_dapm_mux_update_power(card, kcontrol, mux, e);
2097         card->update = NULL;
2098         mutex_unlock(&card->dapm_mutex);
2099         if (ret > 0)
2100                 soc_dpcm_runtime_update(card);
2101         return ret;
2102 }
2103 EXPORT_SYMBOL_GPL(snd_soc_dapm_mux_update_power);
2104
2105 /* test and update the power status of a mixer or switch widget */
2106 static int soc_dapm_mixer_update_power(struct snd_soc_card *card,
2107                                    struct snd_kcontrol *kcontrol, int connect)
2108 {
2109         struct snd_soc_dapm_path *path;
2110         int found = 0;
2111
2112         lockdep_assert_held(&card->dapm_mutex);
2113
2114         /* find dapm widget path assoc with kcontrol */
2115         dapm_kcontrol_for_each_path(path, kcontrol) {
2116                 found = 1;
2117                 path->connect = connect;
2118                 dapm_mark_dirty(path->source, "mixer connection");
2119                 dapm_mark_dirty(path->sink, "mixer update");
2120         }
2121
2122         if (found)
2123                 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2124
2125         return found;
2126 }
2127
2128 int snd_soc_dapm_mixer_update_power(struct snd_soc_dapm_context *dapm,
2129         struct snd_kcontrol *kcontrol, int connect,
2130         struct snd_soc_dapm_update *update)
2131 {
2132         struct snd_soc_card *card = dapm->card;
2133         int ret;
2134
2135         mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2136         card->update = update;
2137         ret = soc_dapm_mixer_update_power(card, kcontrol, connect);
2138         card->update = NULL;
2139         mutex_unlock(&card->dapm_mutex);
2140         if (ret > 0)
2141                 soc_dpcm_runtime_update(card);
2142         return ret;
2143 }
2144 EXPORT_SYMBOL_GPL(snd_soc_dapm_mixer_update_power);
2145
2146 /* show dapm widget status in sys fs */
2147 static ssize_t dapm_widget_show(struct device *dev,
2148         struct device_attribute *attr, char *buf)
2149 {
2150         struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
2151         struct snd_soc_codec *codec =rtd->codec;
2152         struct snd_soc_dapm_widget *w;
2153         int count = 0;
2154         char *state = "not set";
2155
2156         list_for_each_entry(w, &codec->card->widgets, list) {
2157                 if (w->dapm != &codec->dapm)
2158                         continue;
2159
2160                 /* only display widgets that burnm power */
2161                 switch (w->id) {
2162                 case snd_soc_dapm_hp:
2163                 case snd_soc_dapm_mic:
2164                 case snd_soc_dapm_spk:
2165                 case snd_soc_dapm_line:
2166                 case snd_soc_dapm_micbias:
2167                 case snd_soc_dapm_dac:
2168                 case snd_soc_dapm_adc:
2169                 case snd_soc_dapm_pga:
2170                 case snd_soc_dapm_out_drv:
2171                 case snd_soc_dapm_mixer:
2172                 case snd_soc_dapm_mixer_named_ctl:
2173                 case snd_soc_dapm_supply:
2174                 case snd_soc_dapm_regulator_supply:
2175                 case snd_soc_dapm_clock_supply:
2176                         if (w->name)
2177                                 count += sprintf(buf + count, "%s: %s\n",
2178                                         w->name, w->power ? "On":"Off");
2179                 break;
2180                 default:
2181                 break;
2182                 }
2183         }
2184
2185         switch (codec->dapm.bias_level) {
2186         case SND_SOC_BIAS_ON:
2187                 state = "On";
2188                 break;
2189         case SND_SOC_BIAS_PREPARE:
2190                 state = "Prepare";
2191                 break;
2192         case SND_SOC_BIAS_STANDBY:
2193                 state = "Standby";
2194                 break;
2195         case SND_SOC_BIAS_OFF:
2196                 state = "Off";
2197                 break;
2198         }
2199         count += sprintf(buf + count, "PM State: %s\n", state);
2200
2201         return count;
2202 }
2203
2204 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
2205
2206 int snd_soc_dapm_sys_add(struct device *dev)
2207 {
2208         return device_create_file(dev, &dev_attr_dapm_widget);
2209 }
2210
2211 static void snd_soc_dapm_sys_remove(struct device *dev)
2212 {
2213         device_remove_file(dev, &dev_attr_dapm_widget);
2214 }
2215
2216 static void dapm_free_path(struct snd_soc_dapm_path *path)
2217 {
2218         list_del(&path->list_sink);
2219         list_del(&path->list_source);
2220         list_del(&path->list_kcontrol);
2221         list_del(&path->list);
2222         kfree(path);
2223 }
2224
2225 /* free all dapm widgets and resources */
2226 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
2227 {
2228         struct snd_soc_dapm_widget *w, *next_w;
2229         struct snd_soc_dapm_path *p, *next_p;
2230
2231         list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
2232                 if (w->dapm != dapm)
2233                         continue;
2234                 list_del(&w->list);
2235                 /*
2236                  * remove source and sink paths associated to this widget.
2237                  * While removing the path, remove reference to it from both
2238                  * source and sink widgets so that path is removed only once.
2239                  */
2240                 list_for_each_entry_safe(p, next_p, &w->sources, list_sink)
2241                         dapm_free_path(p);
2242
2243                 list_for_each_entry_safe(p, next_p, &w->sinks, list_source)
2244                         dapm_free_path(p);
2245
2246                 kfree(w->kcontrols);
2247                 kfree(w->name);
2248                 kfree(w);
2249         }
2250 }
2251
2252 static struct snd_soc_dapm_widget *dapm_find_widget(
2253                         struct snd_soc_dapm_context *dapm, const char *pin,
2254                         bool search_other_contexts)
2255 {
2256         struct snd_soc_dapm_widget *w;
2257         struct snd_soc_dapm_widget *fallback = NULL;
2258
2259         list_for_each_entry(w, &dapm->card->widgets, list) {
2260                 if (!strcmp(w->name, pin)) {
2261                         if (w->dapm == dapm)
2262                                 return w;
2263                         else
2264                                 fallback = w;
2265                 }
2266         }
2267
2268         if (search_other_contexts)
2269                 return fallback;
2270
2271         return NULL;
2272 }
2273
2274 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
2275                                 const char *pin, int status)
2276 {
2277         struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2278
2279         dapm_assert_locked(dapm);
2280
2281         if (!w) {
2282                 dev_err(dapm->dev, "ASoC: DAPM unknown pin %s\n", pin);
2283                 return -EINVAL;
2284         }
2285
2286         if (w->connected != status)
2287                 dapm_mark_dirty(w, "pin configuration");
2288
2289         w->connected = status;
2290         if (status == 0)
2291                 w->force = 0;
2292
2293         return 0;
2294 }
2295
2296 /**
2297  * snd_soc_dapm_sync_unlocked - scan and power dapm paths
2298  * @dapm: DAPM context
2299  *
2300  * Walks all dapm audio paths and powers widgets according to their
2301  * stream or path usage.
2302  *
2303  * Requires external locking.
2304  *
2305  * Returns 0 for success.
2306  */
2307 int snd_soc_dapm_sync_unlocked(struct snd_soc_dapm_context *dapm)
2308 {
2309         /*
2310          * Suppress early reports (eg, jacks syncing their state) to avoid
2311          * silly DAPM runs during card startup.
2312          */
2313         if (!dapm->card || !dapm->card->instantiated)
2314                 return 0;
2315
2316         return dapm_power_widgets(dapm->card, SND_SOC_DAPM_STREAM_NOP);
2317 }
2318 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync_unlocked);
2319
2320 /**
2321  * snd_soc_dapm_sync - scan and power dapm paths
2322  * @dapm: DAPM context
2323  *
2324  * Walks all dapm audio paths and powers widgets according to their
2325  * stream or path usage.
2326  *
2327  * Returns 0 for success.
2328  */
2329 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
2330 {
2331         int ret;
2332
2333         mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2334         ret = snd_soc_dapm_sync_unlocked(dapm);
2335         mutex_unlock(&dapm->card->dapm_mutex);
2336         return ret;
2337 }
2338 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
2339
2340 static int snd_soc_dapm_add_path(struct snd_soc_dapm_context *dapm,
2341         struct snd_soc_dapm_widget *wsource, struct snd_soc_dapm_widget *wsink,
2342         const char *control,
2343         int (*connected)(struct snd_soc_dapm_widget *source,
2344                          struct snd_soc_dapm_widget *sink))
2345 {
2346         struct snd_soc_dapm_path *path;
2347         int ret;
2348
2349         path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
2350         if (!path)
2351                 return -ENOMEM;
2352
2353         path->source = wsource;
2354         path->sink = wsink;
2355         path->connected = connected;
2356         INIT_LIST_HEAD(&path->list);
2357         INIT_LIST_HEAD(&path->list_kcontrol);
2358         INIT_LIST_HEAD(&path->list_source);
2359         INIT_LIST_HEAD(&path->list_sink);
2360
2361         /* check for external widgets */
2362         if (wsink->id == snd_soc_dapm_input) {
2363                 if (wsource->id == snd_soc_dapm_micbias ||
2364                         wsource->id == snd_soc_dapm_mic ||
2365                         wsource->id == snd_soc_dapm_line ||
2366                         wsource->id == snd_soc_dapm_output)
2367                         wsink->ext = 1;
2368         }
2369         if (wsource->id == snd_soc_dapm_output) {
2370                 if (wsink->id == snd_soc_dapm_spk ||
2371                         wsink->id == snd_soc_dapm_hp ||
2372                         wsink->id == snd_soc_dapm_line ||
2373                         wsink->id == snd_soc_dapm_input)
2374                         wsource->ext = 1;
2375         }
2376
2377         dapm_mark_dirty(wsource, "Route added");
2378         dapm_mark_dirty(wsink, "Route added");
2379
2380         /* connect static paths */
2381         if (control == NULL) {
2382                 list_add(&path->list, &dapm->card->paths);
2383                 list_add(&path->list_sink, &wsink->sources);
2384                 list_add(&path->list_source, &wsource->sinks);
2385                 path->connect = 1;
2386                 return 0;
2387         }
2388
2389         /* connect dynamic paths */
2390         switch (wsink->id) {
2391         case snd_soc_dapm_adc:
2392         case snd_soc_dapm_dac:
2393         case snd_soc_dapm_pga:
2394         case snd_soc_dapm_out_drv:
2395         case snd_soc_dapm_input:
2396         case snd_soc_dapm_output:
2397         case snd_soc_dapm_siggen:
2398         case snd_soc_dapm_micbias:
2399         case snd_soc_dapm_vmid:
2400         case snd_soc_dapm_pre:
2401         case snd_soc_dapm_post:
2402         case snd_soc_dapm_supply:
2403         case snd_soc_dapm_regulator_supply:
2404         case snd_soc_dapm_clock_supply:
2405         case snd_soc_dapm_aif_in:
2406         case snd_soc_dapm_aif_out:
2407         case snd_soc_dapm_dai_in:
2408         case snd_soc_dapm_dai_out:
2409         case snd_soc_dapm_dai_link:
2410         case snd_soc_dapm_kcontrol:
2411                 list_add(&path->list, &dapm->card->paths);
2412                 list_add(&path->list_sink, &wsink->sources);
2413                 list_add(&path->list_source, &wsource->sinks);
2414                 path->connect = 1;
2415                 return 0;
2416         case snd_soc_dapm_mux:
2417                 ret = dapm_connect_mux(dapm, wsource, wsink, path, control,
2418                         &wsink->kcontrol_news[0]);
2419                 if (ret != 0)
2420                         goto err;
2421                 break;
2422         case snd_soc_dapm_switch:
2423         case snd_soc_dapm_mixer:
2424         case snd_soc_dapm_mixer_named_ctl:
2425                 ret = dapm_connect_mixer(dapm, wsource, wsink, path, control);
2426                 if (ret != 0)
2427                         goto err;
2428                 break;
2429         case snd_soc_dapm_hp:
2430         case snd_soc_dapm_mic:
2431         case snd_soc_dapm_line:
2432         case snd_soc_dapm_spk:
2433                 list_add(&path->list, &dapm->card->paths);
2434                 list_add(&path->list_sink, &wsink->sources);
2435                 list_add(&path->list_source, &wsource->sinks);
2436                 path->connect = 0;
2437                 return 0;
2438         }
2439
2440         return 0;
2441 err:
2442         kfree(path);
2443         return ret;
2444 }
2445
2446 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
2447                                   const struct snd_soc_dapm_route *route,
2448                                   unsigned int is_prefixed)
2449 {
2450         struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
2451         struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
2452         const char *sink;
2453         const char *source;
2454         char prefixed_sink[80];
2455         char prefixed_source[80];
2456         int ret;
2457
2458         if (dapm->codec && dapm->codec->name_prefix && !is_prefixed) {
2459                 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
2460                          dapm->codec->name_prefix, route->sink);
2461                 sink = prefixed_sink;
2462                 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
2463                          dapm->codec->name_prefix, route->source);
2464                 source = prefixed_source;
2465         } else {
2466                 sink = route->sink;
2467                 source = route->source;
2468         }
2469
2470         /*
2471          * find src and dest widgets over all widgets but favor a widget from
2472          * current DAPM context
2473          */
2474         list_for_each_entry(w, &dapm->card->widgets, list) {
2475                 if (!wsink && !(strcmp(w->name, sink))) {
2476                         wtsink = w;
2477                         if (w->dapm == dapm)
2478                                 wsink = w;
2479                         continue;
2480                 }
2481                 if (!wsource && !(strcmp(w->name, source))) {
2482                         wtsource = w;
2483                         if (w->dapm == dapm)
2484                                 wsource = w;
2485                 }
2486         }
2487         /* use widget from another DAPM context if not found from this */
2488         if (!wsink)
2489                 wsink = wtsink;
2490         if (!wsource)
2491                 wsource = wtsource;
2492
2493         if (wsource == NULL) {
2494                 dev_err(dapm->dev, "ASoC: no source widget found for %s\n",
2495                         route->source);
2496                 return -ENODEV;
2497         }
2498         if (wsink == NULL) {
2499                 dev_err(dapm->dev, "ASoC: no sink widget found for %s\n",
2500                         route->sink);
2501                 return -ENODEV;
2502         }
2503
2504         ret = snd_soc_dapm_add_path(dapm, wsource, wsink, route->control,
2505                 route->connected);
2506         if (ret)
2507                 goto err;
2508
2509         return 0;
2510 err:
2511         dev_warn(dapm->dev, "ASoC: no dapm match for %s --> %s --> %s\n",
2512                  source, route->control, sink);
2513         return ret;
2514 }
2515
2516 static int snd_soc_dapm_del_route(struct snd_soc_dapm_context *dapm,
2517                                   const struct snd_soc_dapm_route *route)
2518 {
2519         struct snd_soc_dapm_path *path, *p;
2520         const char *sink;
2521         const char *source;
2522         char prefixed_sink[80];
2523         char prefixed_source[80];
2524
2525         if (route->control) {
2526                 dev_err(dapm->dev,
2527                         "ASoC: Removal of routes with controls not supported\n");
2528                 return -EINVAL;
2529         }
2530
2531         if (dapm->codec && dapm->codec->name_prefix) {
2532                 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
2533                          dapm->codec->name_prefix, route->sink);
2534                 sink = prefixed_sink;
2535                 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
2536                          dapm->codec->name_prefix, route->source);
2537                 source = prefixed_source;
2538         } else {
2539                 sink = route->sink;
2540                 source = route->source;
2541         }
2542
2543         path = NULL;
2544         list_for_each_entry(p, &dapm->card->paths, list) {
2545                 if (strcmp(p->source->name, source) != 0)
2546                         continue;
2547                 if (strcmp(p->sink->name, sink) != 0)
2548                         continue;
2549                 path = p;
2550                 break;
2551         }
2552
2553         if (path) {
2554                 dapm_mark_dirty(path->source, "Route removed");
2555                 dapm_mark_dirty(path->sink, "Route removed");
2556
2557                 dapm_free_path(path);
2558         } else {
2559                 dev_warn(dapm->dev, "ASoC: Route %s->%s does not exist\n",
2560                          source, sink);
2561         }
2562
2563         return 0;
2564 }
2565
2566 /**
2567  * snd_soc_dapm_add_routes - Add routes between DAPM widgets
2568  * @dapm: DAPM context
2569  * @route: audio routes
2570  * @num: number of routes
2571  *
2572  * Connects 2 dapm widgets together via a named audio path. The sink is
2573  * the widget receiving the audio signal, whilst the source is the sender
2574  * of the audio signal.
2575  *
2576  * Returns 0 for success else error. On error all resources can be freed
2577  * with a call to snd_soc_card_free().
2578  */
2579 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
2580                             const struct snd_soc_dapm_route *route, int num)
2581 {
2582         int i, r, ret = 0;
2583
2584         mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2585         for (i = 0; i < num; i++) {
2586                 r = snd_soc_dapm_add_route(dapm, route, false);
2587                 if (r < 0) {
2588                         dev_err(dapm->dev, "ASoC: Failed to add route %s -> %s -> %s\n",
2589                                 route->source,
2590                                 route->control ? route->control : "direct",
2591                                 route->sink);
2592                         ret = r;
2593                 }
2594                 route++;
2595         }
2596         mutex_unlock(&dapm->card->dapm_mutex);
2597
2598         return ret;
2599 }
2600 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
2601
2602 /**
2603  * snd_soc_dapm_del_routes - Remove routes between DAPM widgets
2604  * @dapm: DAPM context
2605  * @route: audio routes
2606  * @num: number of routes
2607  *
2608  * Removes routes from the DAPM context.
2609  */
2610 int snd_soc_dapm_del_routes(struct snd_soc_dapm_context *dapm,
2611                             const struct snd_soc_dapm_route *route, int num)
2612 {
2613         int i, ret = 0;
2614
2615         mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2616         for (i = 0; i < num; i++) {
2617                 snd_soc_dapm_del_route(dapm, route);
2618                 route++;
2619         }
2620         mutex_unlock(&dapm->card->dapm_mutex);
2621
2622         return ret;
2623 }
2624 EXPORT_SYMBOL_GPL(snd_soc_dapm_del_routes);
2625
2626 static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm,
2627                                    const struct snd_soc_dapm_route *route)
2628 {
2629         struct snd_soc_dapm_widget *source = dapm_find_widget(dapm,
2630                                                               route->source,
2631                                                               true);
2632         struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm,
2633                                                             route->sink,
2634                                                             true);
2635         struct snd_soc_dapm_path *path;
2636         int count = 0;
2637
2638         if (!source) {
2639                 dev_err(dapm->dev, "ASoC: Unable to find source %s for weak route\n",
2640                         route->source);
2641                 return -ENODEV;
2642         }
2643
2644         if (!sink) {
2645                 dev_err(dapm->dev, "ASoC: Unable to find sink %s for weak route\n",
2646                         route->sink);
2647                 return -ENODEV;
2648         }
2649
2650         if (route->control || route->connected)
2651                 dev_warn(dapm->dev, "ASoC: Ignoring control for weak route %s->%s\n",
2652                          route->source, route->sink);
2653
2654         list_for_each_entry(path, &source->sinks, list_source) {
2655                 if (path->sink == sink) {
2656                         path->weak = 1;
2657                         count++;
2658                 }
2659         }
2660
2661         if (count == 0)
2662                 dev_err(dapm->dev, "ASoC: No path found for weak route %s->%s\n",
2663                         route->source, route->sink);
2664         if (count > 1)
2665                 dev_warn(dapm->dev, "ASoC: %d paths found for weak route %s->%s\n",
2666                          count, route->source, route->sink);
2667
2668         return 0;
2669 }
2670
2671 /**
2672  * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
2673  * @dapm: DAPM context
2674  * @route: audio routes
2675  * @num: number of routes
2676  *
2677  * Mark existing routes matching those specified in the passed array
2678  * as being weak, meaning that they are ignored for the purpose of
2679  * power decisions.  The main intended use case is for sidetone paths
2680  * which couple audio between other independent paths if they are both
2681  * active in order to make the combination work better at the user
2682  * level but which aren't intended to be "used".
2683  *
2684  * Note that CODEC drivers should not use this as sidetone type paths
2685  * can frequently also be used as bypass paths.
2686  */
2687 int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm,
2688                              const struct snd_soc_dapm_route *route, int num)
2689 {
2690         int i, err;
2691         int ret = 0;
2692
2693         mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2694         for (i = 0; i < num; i++) {
2695                 err = snd_soc_dapm_weak_route(dapm, route);
2696                 if (err)
2697                         ret = err;
2698                 route++;
2699         }
2700         mutex_unlock(&dapm->card->dapm_mutex);
2701
2702         return ret;
2703 }
2704 EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes);
2705
2706 /**
2707  * snd_soc_dapm_new_widgets - add new dapm widgets
2708  * @dapm: DAPM context
2709  *
2710  * Checks the codec for any new dapm widgets and creates them if found.
2711  *
2712  * Returns 0 for success.
2713  */
2714 int snd_soc_dapm_new_widgets(struct snd_soc_card *card)
2715 {
2716         struct snd_soc_dapm_widget *w;
2717         unsigned int val;
2718
2719         mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2720
2721         list_for_each_entry(w, &card->widgets, list)
2722         {
2723                 if (w->new)
2724                         continue;
2725
2726                 if (w->num_kcontrols) {
2727                         w->kcontrols = kzalloc(w->num_kcontrols *
2728                                                 sizeof(struct snd_kcontrol *),
2729                                                 GFP_KERNEL);
2730                         if (!w->kcontrols) {
2731                                 mutex_unlock(&card->dapm_mutex);
2732                                 return -ENOMEM;
2733                         }
2734                 }
2735
2736                 switch(w->id) {
2737                 case snd_soc_dapm_switch:
2738                 case snd_soc_dapm_mixer:
2739                 case snd_soc_dapm_mixer_named_ctl:
2740                         dapm_new_mixer(w);
2741                         break;
2742                 case snd_soc_dapm_mux:
2743                         dapm_new_mux(w);
2744                         break;
2745                 case snd_soc_dapm_pga:
2746                 case snd_soc_dapm_out_drv:
2747                         dapm_new_pga(w);
2748                         break;
2749                 default:
2750                         break;
2751                 }
2752
2753                 /* Read the initial power state from the device */
2754                 if (w->reg >= 0) {
2755                         soc_widget_read(w, w->reg, &val);
2756                         val = val >> w->shift;
2757                         val &= w->mask;
2758                         if (val == w->on_val)
2759                                 w->power = 1;
2760                 }
2761
2762                 w->new = 1;
2763
2764                 dapm_mark_dirty(w, "new widget");
2765                 dapm_debugfs_add_widget(w);
2766         }
2767
2768         dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2769         mutex_unlock(&card->dapm_mutex);
2770         return 0;
2771 }
2772 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
2773
2774 /**
2775  * snd_soc_dapm_get_volsw - dapm mixer get callback
2776  * @kcontrol: mixer control
2777  * @ucontrol: control element information
2778  *
2779  * Callback to get the value of a dapm mixer control.
2780  *
2781  * Returns 0 for success.
2782  */
2783 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
2784         struct snd_ctl_elem_value *ucontrol)
2785 {
2786         struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
2787         struct snd_soc_card *card = codec->card;
2788         struct soc_mixer_control *mc =
2789                 (struct soc_mixer_control *)kcontrol->private_value;
2790         int reg = mc->reg;
2791         unsigned int shift = mc->shift;
2792         int max = mc->max;
2793         unsigned int mask = (1 << fls(max)) - 1;
2794         unsigned int invert = mc->invert;
2795         unsigned int val;
2796
2797         if (snd_soc_volsw_is_stereo(mc))
2798                 dev_warn(codec->dapm.dev,
2799                          "ASoC: Control '%s' is stereo, which is not supported\n",
2800                          kcontrol->id.name);
2801
2802         mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2803         if (dapm_kcontrol_is_powered(kcontrol) && reg != SND_SOC_NOPM)
2804                 val = (snd_soc_read(codec, reg) >> shift) & mask;
2805         else
2806                 val = dapm_kcontrol_get_value(kcontrol);
2807         mutex_unlock(&card->dapm_mutex);
2808
2809         if (invert)
2810                 ucontrol->value.integer.value[0] = max - val;
2811         else
2812                 ucontrol->value.integer.value[0] = val;
2813
2814         return 0;
2815 }
2816 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
2817
2818 /**
2819  * snd_soc_dapm_put_volsw - dapm mixer set callback
2820  * @kcontrol: mixer control
2821  * @ucontrol: control element information
2822  *
2823  * Callback to set the value of a dapm mixer control.
2824  *
2825  * Returns 0 for success.
2826  */
2827 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
2828         struct snd_ctl_elem_value *ucontrol)
2829 {
2830         struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
2831         struct snd_soc_card *card = codec->card;
2832         struct soc_mixer_control *mc =
2833                 (struct soc_mixer_control *)kcontrol->private_value;
2834         int reg = mc->reg;
2835         unsigned int shift = mc->shift;
2836         int max = mc->max;
2837         unsigned int mask = (1 << fls(max)) - 1;
2838         unsigned int invert = mc->invert;
2839         unsigned int val;
2840         int connect, change;
2841         struct snd_soc_dapm_update update;
2842         int ret = 0;
2843
2844         if (snd_soc_volsw_is_stereo(mc))
2845                 dev_warn(codec->dapm.dev,
2846                          "ASoC: Control '%s' is stereo, which is not supported\n",
2847                          kcontrol->id.name);
2848
2849         val = (ucontrol->value.integer.value[0] & mask);
2850         connect = !!val;
2851
2852         if (invert)
2853                 val = max - val;
2854
2855         mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2856
2857         change = dapm_kcontrol_set_value(kcontrol, val);
2858
2859         if (reg != SND_SOC_NOPM) {
2860                 mask = mask << shift;
2861                 val = val << shift;
2862
2863                 change = snd_soc_test_bits(codec, reg, mask, val);
2864         }
2865
2866         if (change) {
2867                 if (reg != SND_SOC_NOPM) {
2868                         update.kcontrol = kcontrol;
2869                         update.reg = reg;
2870                         update.mask = mask;
2871                         update.val = val;
2872
2873                         card->update = &update;
2874                 }
2875
2876                 ret = soc_dapm_mixer_update_power(card, kcontrol, connect);
2877
2878                 card->update = NULL;
2879         }
2880
2881         mutex_unlock(&card->dapm_mutex);
2882
2883         if (ret > 0)
2884                 soc_dpcm_runtime_update(card);
2885
2886         return change;
2887 }
2888 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
2889
2890 /**
2891  * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
2892  * @kcontrol: mixer control
2893  * @ucontrol: control element information
2894  *
2895  * Callback to get the value of a dapm enumerated double mixer control.
2896  *
2897  * Returns 0 for success.
2898  */
2899 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
2900         struct snd_ctl_elem_value *ucontrol)
2901 {
2902         struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
2903         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2904         unsigned int reg_val, val;
2905
2906         if (e->reg != SND_SOC_NOPM)
2907                 reg_val = snd_soc_read(codec, e->reg);
2908         else
2909                 reg_val = dapm_kcontrol_get_value(kcontrol);
2910
2911         val = (reg_val >> e->shift_l) & e->mask;
2912         ucontrol->value.enumerated.item[0] = snd_soc_enum_val_to_item(e, val);
2913         if (e->shift_l != e->shift_r) {
2914                 val = (reg_val >> e->shift_r) & e->mask;
2915                 val = snd_soc_enum_val_to_item(e, val);
2916                 ucontrol->value.enumerated.item[1] = val;
2917         }
2918
2919         return 0;
2920 }
2921 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
2922
2923 /**
2924  * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
2925  * @kcontrol: mixer control
2926  * @ucontrol: control element information
2927  *
2928  * Callback to set the value of a dapm enumerated double mixer control.
2929  *
2930  * Returns 0 for success.
2931  */
2932 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
2933         struct snd_ctl_elem_value *ucontrol)
2934 {
2935         struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
2936         struct snd_soc_card *card = codec->card;
2937         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2938         unsigned int *item = ucontrol->value.enumerated.item;
2939         unsigned int val, change;
2940         unsigned int mask;
2941         struct snd_soc_dapm_update update;
2942         int ret = 0;
2943
2944         if (item[0] >= e->items)
2945                 return -EINVAL;
2946
2947         val = snd_soc_enum_item_to_val(e, item[0]) << e->shift_l;
2948         mask = e->mask << e->shift_l;
2949         if (e->shift_l != e->shift_r) {
2950                 if (item[1] > e->items)
2951                         return -EINVAL;
2952                 val |= snd_soc_enum_item_to_val(e, item[1]) << e->shift_l;
2953                 mask |= e->mask << e->shift_r;
2954         }
2955
2956         mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2957
2958         if (e->reg != SND_SOC_NOPM)
2959                 change = snd_soc_test_bits(codec, e->reg, mask, val);
2960         else
2961                 change = dapm_kcontrol_set_value(kcontrol, val);
2962
2963         if (change) {
2964                 if (e->reg != SND_SOC_NOPM) {
2965                         update.kcontrol = kcontrol;
2966                         update.reg = e->reg;
2967                         update.mask = mask;
2968                         update.val = val;
2969                         card->update = &update;
2970                 }
2971
2972                 ret = soc_dapm_mux_update_power(card, kcontrol, item[0], e);
2973
2974                 card->update = NULL;
2975         }
2976
2977         mutex_unlock(&card->dapm_mutex);
2978
2979         if (ret > 0)
2980                 soc_dpcm_runtime_update(card);
2981
2982         return change;
2983 }
2984 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
2985
2986 /**
2987  * snd_soc_dapm_info_pin_switch - Info for a pin switch
2988  *
2989  * @kcontrol: mixer control
2990  * @uinfo: control element information
2991  *
2992  * Callback to provide information about a pin switch control.
2993  */
2994 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
2995                                  struct snd_ctl_elem_info *uinfo)
2996 {
2997         uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2998         uinfo->count = 1;
2999         uinfo->value.integer.min = 0;
3000         uinfo->value.integer.max = 1;
3001
3002         return 0;
3003 }
3004 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
3005
3006 /**
3007  * snd_soc_dapm_get_pin_switch - Get information for a pin switch
3008  *
3009  * @kcontrol: mixer control
3010  * @ucontrol: Value
3011  */
3012 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
3013                                 struct snd_ctl_elem_value *ucontrol)
3014 {
3015         struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
3016         const char *pin = (const char *)kcontrol->private_value;
3017
3018         mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3019
3020         ucontrol->value.integer.value[0] =
3021                 snd_soc_dapm_get_pin_status(&card->dapm, pin);
3022
3023         mutex_unlock(&card->dapm_mutex);
3024
3025         return 0;
3026 }
3027 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
3028
3029 /**
3030  * snd_soc_dapm_put_pin_switch - Set information for a pin switch
3031  *
3032  * @kcontrol: mixer control
3033  * @ucontrol: Value
3034  */
3035 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
3036                                 struct snd_ctl_elem_value *ucontrol)
3037 {
3038         struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
3039         const char *pin = (const char *)kcontrol->private_value;
3040
3041         if (ucontrol->value.integer.value[0])
3042                 snd_soc_dapm_enable_pin(&card->dapm, pin);
3043         else
3044                 snd_soc_dapm_disable_pin(&card->dapm, pin);
3045
3046         snd_soc_dapm_sync(&card->dapm);
3047         return 0;
3048 }
3049 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
3050
3051 static struct snd_soc_dapm_widget *
3052 snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
3053                          const struct snd_soc_dapm_widget *widget)
3054 {
3055         struct snd_soc_dapm_widget *w;
3056         int ret;
3057
3058         if ((w = dapm_cnew_widget(widget)) == NULL)
3059                 return NULL;
3060
3061         switch (w->id) {
3062         case snd_soc_dapm_regulator_supply:
3063                 w->regulator = devm_regulator_get(dapm->dev, w->name);
3064                 if (IS_ERR(w->regulator)) {
3065                         ret = PTR_ERR(w->regulator);
3066                         dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n",
3067                                 w->name, ret);
3068                         return NULL;
3069                 }
3070
3071                 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
3072                         ret = regulator_allow_bypass(w->regulator, true);
3073                         if (ret != 0)
3074                                 dev_warn(w->dapm->dev,
3075                                          "ASoC: Failed to bypass %s: %d\n",
3076                                          w->name, ret);
3077                 }
3078                 break;
3079         case snd_soc_dapm_clock_supply:
3080 #ifdef CONFIG_CLKDEV_LOOKUP
3081                 w->clk = devm_clk_get(dapm->dev, w->name);
3082                 if (IS_ERR(w->clk)) {
3083                         ret = PTR_ERR(w->clk);
3084                         dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n",
3085                                 w->name, ret);
3086                         return NULL;
3087                 }
3088 #else
3089                 return NULL;
3090 #endif
3091                 break;
3092         default:
3093                 break;
3094         }
3095
3096         if (dapm->codec && dapm->codec->name_prefix)
3097                 w->name = kasprintf(GFP_KERNEL, "%s %s",
3098                         dapm->codec->name_prefix, widget->name);
3099         else
3100                 w->name = kasprintf(GFP_KERNEL, "%s", widget->name);
3101
3102         if (w->name == NULL) {
3103                 kfree(w);
3104                 return NULL;
3105         }
3106
3107         switch (w->id) {
3108         case snd_soc_dapm_switch:
3109         case snd_soc_dapm_mixer:
3110         case snd_soc_dapm_mixer_named_ctl:
3111                 w->power_check = dapm_generic_check_power;
3112                 break;
3113         case snd_soc_dapm_mux:
3114                 w->power_check = dapm_generic_check_power;
3115                 break;
3116         case snd_soc_dapm_dai_out:
3117                 w->power_check = dapm_adc_check_power;
3118                 break;
3119         case snd_soc_dapm_dai_in:
3120                 w->power_check = dapm_dac_check_power;
3121                 break;
3122         case snd_soc_dapm_adc:
3123         case snd_soc_dapm_aif_out:
3124         case snd_soc_dapm_dac:
3125         case snd_soc_dapm_aif_in:
3126         case snd_soc_dapm_pga:
3127         case snd_soc_dapm_out_drv:
3128         case snd_soc_dapm_input:
3129         case snd_soc_dapm_output:
3130         case snd_soc_dapm_micbias:
3131         case snd_soc_dapm_spk:
3132         case snd_soc_dapm_hp:
3133         case snd_soc_dapm_mic:
3134         case snd_soc_dapm_line:
3135         case snd_soc_dapm_dai_link:
3136                 w->power_check = dapm_generic_check_power;
3137                 break;
3138         case snd_soc_dapm_supply:
3139         case snd_soc_dapm_regulator_supply:
3140         case snd_soc_dapm_clock_supply:
3141         case snd_soc_dapm_kcontrol:
3142                 w->power_check = dapm_supply_check_power;
3143                 break;
3144         default:
3145                 w->power_check = dapm_always_on_check_power;
3146                 break;
3147         }
3148
3149         w->dapm = dapm;
3150         w->codec = dapm->codec;
3151         w->platform = dapm->platform;
3152         INIT_LIST_HEAD(&w->sources);
3153         INIT_LIST_HEAD(&w->sinks);
3154         INIT_LIST_HEAD(&w->list);
3155         INIT_LIST_HEAD(&w->dirty);
3156         list_add(&w->list, &dapm->card->widgets);
3157
3158         /* machine layer set ups unconnected pins and insertions */
3159         w->connected = 1;
3160         return w;
3161 }
3162
3163 /**
3164  * snd_soc_dapm_new_controls - create new dapm controls
3165  * @dapm: DAPM context
3166  * @widget: widget array
3167  * @num: number of widgets
3168  *
3169  * Creates new DAPM controls based upon the templates.
3170  *
3171  * Returns 0 for success else error.
3172  */
3173 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
3174         const struct snd_soc_dapm_widget *widget,
3175         int num)
3176 {
3177         struct snd_soc_dapm_widget *w;
3178         int i;
3179         int ret = 0;
3180
3181         mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
3182         for (i = 0; i < num; i++) {
3183                 w = snd_soc_dapm_new_control(dapm, widget);
3184                 if (!w) {
3185                         dev_err(dapm->dev,
3186                                 "ASoC: Failed to create DAPM control %s\n",
3187                                 widget->name);
3188                         ret = -ENOMEM;
3189                         break;
3190                 }
3191                 widget++;
3192         }
3193         mutex_unlock(&dapm->card->dapm_mutex);
3194         return ret;
3195 }
3196 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
3197
3198 static int snd_soc_dai_link_event(struct snd_soc_dapm_widget *w,
3199                                   struct snd_kcontrol *kcontrol, int event)
3200 {
3201         struct snd_soc_dapm_path *source_p, *sink_p;
3202         struct snd_soc_dai *source, *sink;
3203         const struct snd_soc_pcm_stream *config = w->params;
3204         struct snd_pcm_substream substream;
3205         struct snd_pcm_hw_params *params = NULL;
3206         u64 fmt;
3207         int ret;
3208
3209         if (WARN_ON(!config) ||
3210             WARN_ON(list_empty(&w->sources) || list_empty(&w->sinks)))
3211                 return -EINVAL;
3212
3213         /* We only support a single source and sink, pick the first */
3214         source_p = list_first_entry(&w->sources, struct snd_soc_dapm_path,
3215                                     list_sink);
3216         sink_p = list_first_entry(&w->sinks, struct snd_soc_dapm_path,
3217                                   list_source);
3218
3219         if (WARN_ON(!source_p || !sink_p) ||
3220             WARN_ON(!sink_p->source || !source_p->sink) ||
3221             WARN_ON(!source_p->source || !sink_p->sink))
3222                 return -EINVAL;
3223
3224         source = source_p->source->priv;
3225         sink = sink_p->sink->priv;
3226
3227         /* Be a little careful as we don't want to overflow the mask array */
3228         if (config->formats) {
3229                 fmt = ffs(config->formats) - 1;
3230         } else {
3231                 dev_warn(w->dapm->dev, "ASoC: Invalid format %llx specified\n",
3232                          config->formats);
3233                 fmt = 0;
3234         }
3235
3236         /* Currently very limited parameter selection */
3237         params = kzalloc(sizeof(*params), GFP_KERNEL);
3238         if (!params) {
3239                 ret = -ENOMEM;
3240                 goto out;
3241         }
3242         snd_mask_set(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), fmt);
3243
3244         hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->min =
3245                 config->rate_min;
3246         hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->max =
3247                 config->rate_max;
3248
3249         hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->min
3250                 = config->channels_min;
3251         hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->max
3252                 = config->channels_max;
3253
3254         memset(&substream, 0, sizeof(substream));
3255
3256         switch (event) {
3257         case SND_SOC_DAPM_PRE_PMU:
3258                 if (source->driver->ops && source->driver->ops->hw_params) {
3259                         substream.stream = SNDRV_PCM_STREAM_CAPTURE;
3260                         ret = source->driver->ops->hw_params(&substream,
3261                                                              params, source);
3262                         if (ret != 0) {
3263                                 dev_err(source->dev,
3264                                         "ASoC: hw_params() failed: %d\n", ret);
3265                                 goto out;
3266                         }
3267                 }
3268
3269                 if (sink->driver->ops && sink->driver->ops->hw_params) {
3270                         substream.stream = SNDRV_PCM_STREAM_PLAYBACK;
3271                         ret = sink->driver->ops->hw_params(&substream, params,
3272                                                            sink);
3273                         if (ret != 0) {
3274                                 dev_err(sink->dev,
3275                                         "ASoC: hw_params() failed: %d\n", ret);
3276                                 goto out;
3277                         }
3278                 }
3279                 break;
3280
3281         case SND_SOC_DAPM_POST_PMU:
3282                 ret = snd_soc_dai_digital_mute(sink, 0,
3283                                                SNDRV_PCM_STREAM_PLAYBACK);
3284                 if (ret != 0 && ret != -ENOTSUPP)
3285                         dev_warn(sink->dev, "ASoC: Failed to unmute: %d\n", ret);
3286                 ret = 0;
3287                 break;
3288
3289         case SND_SOC_DAPM_PRE_PMD:
3290                 ret = snd_soc_dai_digital_mute(sink, 1,
3291                                                SNDRV_PCM_STREAM_PLAYBACK);
3292                 if (ret != 0 && ret != -ENOTSUPP)
3293                         dev_warn(sink->dev, "ASoC: Failed to mute: %d\n", ret);
3294                 ret = 0;
3295                 break;
3296
3297         default:
3298                 WARN(1, "Unknown event %d\n", event);
3299                 return -EINVAL;
3300         }
3301
3302 out:
3303         kfree(params);
3304         return ret;
3305 }
3306
3307 int snd_soc_dapm_new_pcm(struct snd_soc_card *card,
3308                          const struct snd_soc_pcm_stream *params,
3309                          struct snd_soc_dapm_widget *source,
3310                          struct snd_soc_dapm_widget *sink)
3311 {
3312         struct snd_soc_dapm_route routes[2];
3313         struct snd_soc_dapm_widget template;
3314         struct snd_soc_dapm_widget *w;
3315         size_t len;
3316         char *link_name;
3317
3318         len = strlen(source->name) + strlen(sink->name) + 2;
3319         link_name = devm_kzalloc(card->dev, len, GFP_KERNEL);
3320         if (!link_name)
3321                 return -ENOMEM;
3322         snprintf(link_name, len, "%s-%s", source->name, sink->name);
3323
3324         memset(&template, 0, sizeof(template));
3325         template.reg = SND_SOC_NOPM;
3326         template.id = snd_soc_dapm_dai_link;
3327         template.name = link_name;
3328         template.event = snd_soc_dai_link_event;
3329         template.event_flags = SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
3330                 SND_SOC_DAPM_PRE_PMD;
3331
3332         dev_dbg(card->dev, "ASoC: adding %s widget\n", link_name);
3333
3334         w = snd_soc_dapm_new_control(&card->dapm, &template);
3335         if (!w) {
3336                 dev_err(card->dev, "ASoC: Failed to create %s widget\n",
3337                         link_name);
3338                 return -ENOMEM;
3339         }
3340
3341         w->params = params;
3342
3343         memset(&routes, 0, sizeof(routes));
3344
3345         routes[0].source = source->name;
3346         routes[0].sink = link_name;
3347         routes[1].source = link_name;
3348         routes[1].sink = sink->name;
3349
3350         return snd_soc_dapm_add_routes(&card->dapm, routes,
3351                                        ARRAY_SIZE(routes));
3352 }
3353
3354 int snd_soc_dapm_new_dai_widgets(struct snd_soc_dapm_context *dapm,
3355                                  struct snd_soc_dai *dai)
3356 {
3357         struct snd_soc_dapm_widget template;
3358         struct snd_soc_dapm_widget *w;
3359
3360         WARN_ON(dapm->dev != dai->dev);
3361
3362         memset(&template, 0, sizeof(template));
3363         template.reg = SND_SOC_NOPM;
3364
3365         if (dai->driver->playback.stream_name) {
3366                 template.id = snd_soc_dapm_dai_in;
3367                 template.name = dai->driver->playback.stream_name;
3368                 template.sname = dai->driver->playback.stream_name;
3369
3370                 dev_dbg(dai->dev, "ASoC: adding %s widget\n",
3371                         template.name);
3372
3373                 w = snd_soc_dapm_new_control(dapm, &template);
3374                 if (!w) {
3375                         dev_err(dapm->dev, "ASoC: Failed to create %s widget\n",
3376                                 dai->driver->playback.stream_name);
3377                         return -ENOMEM;
3378                 }
3379
3380                 w->priv = dai;
3381                 dai->playback_widget = w;
3382         }
3383
3384         if (dai->driver->capture.stream_name) {
3385                 template.id = snd_soc_dapm_dai_out;
3386                 template.name = dai->driver->capture.stream_name;
3387                 template.sname = dai->driver->capture.stream_name;
3388
3389                 dev_dbg(dai->dev, "ASoC: adding %s widget\n",
3390                         template.name);
3391
3392                 w = snd_soc_dapm_new_control(dapm, &template);
3393                 if (!w) {
3394                         dev_err(dapm->dev, "ASoC: Failed to create %s widget\n",
3395                                 dai->driver->capture.stream_name);
3396                         return -ENOMEM;
3397                 }
3398
3399                 w->priv = dai;
3400                 dai->capture_widget = w;
3401         }
3402
3403         return 0;
3404 }
3405
3406 int snd_soc_dapm_link_dai_widgets(struct snd_soc_card *card)
3407 {
3408         struct snd_soc_dapm_widget *dai_w, *w;
3409         struct snd_soc_dai *dai;
3410
3411         /* For each DAI widget... */
3412         list_for_each_entry(dai_w, &card->widgets, list) {
3413                 switch (dai_w->id) {
3414                 case snd_soc_dapm_dai_in:
3415                 case snd_soc_dapm_dai_out:
3416                         break;
3417                 default:
3418                         continue;
3419                 }
3420
3421                 dai = dai_w->priv;
3422
3423                 /* ...find all widgets with the same stream and link them */
3424                 list_for_each_entry(w, &card->widgets, list) {
3425                         if (w->dapm != dai_w->dapm)
3426                                 continue;
3427
3428                         switch (w->id) {
3429                         case snd_soc_dapm_dai_in:
3430                         case snd_soc_dapm_dai_out:
3431                                 continue;
3432                         default:
3433                                 break;
3434                         }
3435
3436                         if (!w->sname || !strstr(w->sname, dai_w->name))
3437                                 continue;
3438
3439                         if (dai->driver->playback.stream_name &&
3440                             strstr(w->sname,
3441                                    dai->driver->playback.stream_name)) {
3442                                 dev_dbg(dai->dev, "%s -> %s\n",
3443                                          dai->playback_widget->name, w->name);
3444
3445                                 snd_soc_dapm_add_path(w->dapm,
3446                                         dai->playback_widget, w, NULL, NULL);
3447                         }
3448
3449                         if (dai->driver->capture.stream_name &&
3450                             strstr(w->sname,
3451                                    dai->driver->capture.stream_name)) {
3452                                 dev_dbg(dai->dev, "%s -> %s\n",
3453                                         w->name, dai->capture_widget->name);
3454
3455                                 snd_soc_dapm_add_path(w->dapm, w,
3456                                         dai->capture_widget, NULL, NULL);
3457                         }
3458                 }
3459         }
3460
3461         return 0;
3462 }
3463
3464 void snd_soc_dapm_connect_dai_link_widgets(struct snd_soc_card *card)
3465 {
3466         struct snd_soc_pcm_runtime *rtd = card->rtd;
3467         struct snd_soc_dai *cpu_dai, *codec_dai;
3468         struct snd_soc_dapm_route r;
3469         int i;
3470
3471         memset(&r, 0, sizeof(r));
3472
3473         /* for each BE DAI link... */
3474         for (i = 0; i < card->num_rtd; i++) {
3475                 rtd = &card->rtd[i];
3476                 cpu_dai = rtd->cpu_dai;
3477                 codec_dai = rtd->codec_dai;
3478
3479                 /* dynamic FE links have no fixed DAI mapping */
3480                 if (rtd->dai_link->dynamic)
3481                         continue;
3482
3483                 /* there is no point in connecting BE DAI links with dummies */
3484                 if (snd_soc_dai_is_dummy(codec_dai) ||
3485                         snd_soc_dai_is_dummy(cpu_dai))
3486                         continue;
3487
3488                 /* connect BE DAI playback if widgets are valid */
3489                 if (codec_dai->playback_widget && cpu_dai->playback_widget) {
3490                         r.source = cpu_dai->playback_widget->name;
3491                         r.sink = codec_dai->playback_widget->name;
3492                         dev_dbg(rtd->dev, "connected DAI link %s:%s -> %s:%s\n",
3493                                 cpu_dai->codec->name, r.source,
3494                                 codec_dai->platform->name, r.sink);
3495
3496                         snd_soc_dapm_add_route(&card->dapm, &r, true);
3497                 }
3498
3499                 /* connect BE DAI capture if widgets are valid */
3500                 if (codec_dai->capture_widget && cpu_dai->capture_widget) {
3501                         r.source = codec_dai->capture_widget->name;
3502                         r.sink = cpu_dai->capture_widget->name;
3503                         dev_dbg(rtd->dev, "connected DAI link %s:%s -> %s:%s\n",
3504                                 codec_dai->codec->name, r.source,
3505                                 cpu_dai->platform->name, r.sink);
3506
3507                         snd_soc_dapm_add_route(&card->dapm, &r, true);
3508                 }
3509
3510         }
3511 }
3512
3513 static void soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
3514         int event)
3515 {
3516
3517         struct snd_soc_dapm_widget *w_cpu, *w_codec;
3518         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
3519         struct snd_soc_dai *codec_dai = rtd->codec_dai;
3520
3521         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
3522                 w_cpu = cpu_dai->playback_widget;
3523                 w_codec = codec_dai->playback_widget;
3524         } else {
3525                 w_cpu = cpu_dai->capture_widget;
3526                 w_codec = codec_dai->capture_widget;
3527         }
3528
3529         if (w_cpu) {
3530
3531                 dapm_mark_dirty(w_cpu, "stream event");
3532
3533                 switch (event) {
3534                 case SND_SOC_DAPM_STREAM_START:
3535                         w_cpu->active = 1;
3536                         break;
3537                 case SND_SOC_DAPM_STREAM_STOP:
3538                         w_cpu->active = 0;
3539                         break;
3540                 case SND_SOC_DAPM_STREAM_SUSPEND:
3541                 case SND_SOC_DAPM_STREAM_RESUME:
3542                 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
3543                 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
3544                         break;
3545                 }
3546         }
3547
3548         if (w_codec) {
3549
3550                 dapm_mark_dirty(w_codec, "stream event");
3551
3552                 switch (event) {
3553                 case SND_SOC_DAPM_STREAM_START:
3554                         w_codec->active = 1;
3555                         break;
3556                 case SND_SOC_DAPM_STREAM_STOP:
3557                         w_codec->active = 0;
3558                         break;
3559                 case SND_SOC_DAPM_STREAM_SUSPEND:
3560                 case SND_SOC_DAPM_STREAM_RESUME:
3561                 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
3562                 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
3563                         break;
3564                 }
3565         }
3566
3567         dapm_power_widgets(rtd->card, event);
3568 }
3569
3570 /**
3571  * snd_soc_dapm_stream_event - send a stream event to the dapm core
3572  * @rtd: PCM runtime data
3573  * @stream: stream name
3574  * @event: stream event
3575  *
3576  * Sends a stream event to the dapm core. The core then makes any
3577  * necessary widget power changes.
3578  *
3579  * Returns 0 for success else error.
3580  */
3581 void snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
3582                               int event)
3583 {
3584         struct snd_soc_card *card = rtd->card;
3585
3586         mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3587         soc_dapm_stream_event(rtd, stream, event);
3588         mutex_unlock(&card->dapm_mutex);
3589 }
3590
3591 /**
3592  * snd_soc_dapm_enable_pin_unlocked - enable pin.
3593  * @dapm: DAPM context
3594  * @pin: pin name
3595  *
3596  * Enables input/output pin and its parents or children widgets iff there is
3597  * a valid audio route and active audio stream.
3598  *
3599  * Requires external locking.
3600  *
3601  * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3602  * do any widget power switching.
3603  */
3604 int snd_soc_dapm_enable_pin_unlocked(struct snd_soc_dapm_context *dapm,
3605                                    const char *pin)
3606 {
3607         return snd_soc_dapm_set_pin(dapm, pin, 1);
3608 }
3609 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin_unlocked);
3610
3611 /**
3612  * snd_soc_dapm_enable_pin - enable pin.
3613  * @dapm: DAPM context
3614  * @pin: pin name
3615  *
3616  * Enables input/output pin and its parents or children widgets iff there is
3617  * a valid audio route and active audio stream.
3618  *
3619  * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3620  * do any widget power switching.
3621  */
3622 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
3623 {
3624         int ret;
3625
3626         mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3627
3628         ret = snd_soc_dapm_set_pin(dapm, pin, 1);
3629
3630         mutex_unlock(&dapm->card->dapm_mutex);
3631
3632         return ret;
3633 }
3634 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
3635
3636 /**
3637  * snd_soc_dapm_force_enable_pin_unlocked - force a pin to be enabled
3638  * @dapm: DAPM context
3639  * @pin: pin name
3640  *
3641  * Enables input/output pin regardless of any other state.  This is
3642  * intended for use with microphone bias supplies used in microphone
3643  * jack detection.
3644  *
3645  * Requires external locking.
3646  *
3647  * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3648  * do any widget power switching.
3649  */
3650 int snd_soc_dapm_force_enable_pin_unlocked(struct snd_soc_dapm_context *dapm,
3651                                          const char *pin)
3652 {
3653         struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
3654
3655         if (!w) {
3656                 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
3657                 return -EINVAL;
3658         }
3659
3660         dev_dbg(w->dapm->dev, "ASoC: force enable pin %s\n", pin);
3661         w->connected = 1;
3662         w->force = 1;
3663         dapm_mark_dirty(w, "force enable");
3664
3665         return 0;
3666 }
3667 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin_unlocked);
3668
3669 /**
3670  * snd_soc_dapm_force_enable_pin - force a pin to be enabled
3671  * @dapm: DAPM context
3672  * @pin: pin name
3673  *
3674  * Enables input/output pin regardless of any other state.  This is
3675  * intended for use with microphone bias supplies used in microphone
3676  * jack detection.
3677  *
3678  * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3679  * do any widget power switching.
3680  */
3681 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
3682                                   const char *pin)
3683 {
3684         int ret;
3685
3686         mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3687
3688         ret = snd_soc_dapm_force_enable_pin_unlocked(dapm, pin);
3689
3690         mutex_unlock(&dapm->card->dapm_mutex);
3691
3692         return ret;
3693 }
3694 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
3695
3696 /**
3697  * snd_soc_dapm_disable_pin_unlocked - disable pin.
3698  * @dapm: DAPM context
3699  * @pin: pin name
3700  *
3701  * Disables input/output pin and its parents or children widgets.
3702  *
3703  * Requires external locking.
3704  *
3705  * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3706  * do any widget power switching.
3707  */
3708 int snd_soc_dapm_disable_pin_unlocked(struct snd_soc_dapm_context *dapm,
3709                                     const char *pin)
3710 {
3711         return snd_soc_dapm_set_pin(dapm, pin, 0);
3712 }
3713 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin_unlocked);
3714
3715 /**
3716  * snd_soc_dapm_disable_pin - disable pin.
3717  * @dapm: DAPM context
3718  * @pin: pin name
3719  *
3720  * Disables input/output pin and its parents or children widgets.
3721  *
3722  * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3723  * do any widget power switching.
3724  */
3725 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
3726                              const char *pin)
3727 {
3728         int ret;
3729
3730         mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3731
3732         ret = snd_soc_dapm_set_pin(dapm, pin, 0);
3733
3734         mutex_unlock(&dapm->card->dapm_mutex);
3735
3736         return ret;
3737 }
3738 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
3739
3740 /**
3741  * snd_soc_dapm_nc_pin_unlocked - permanently disable pin.
3742  * @dapm: DAPM context
3743  * @pin: pin name
3744  *
3745  * Marks the specified pin as being not connected, disabling it along
3746  * any parent or child widgets.  At present this is identical to
3747  * snd_soc_dapm_disable_pin() but in future it will be extended to do
3748  * additional things such as disabling controls which only affect
3749  * paths through the pin.
3750  *
3751  * Requires external locking.
3752  *
3753  * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3754  * do any widget power switching.
3755  */
3756 int snd_soc_dapm_nc_pin_unlocked(struct snd_soc_dapm_context *dapm,
3757                                const char *pin)
3758 {
3759         return snd_soc_dapm_set_pin(dapm, pin, 0);
3760 }
3761 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin_unlocked);
3762
3763 /**
3764  * snd_soc_dapm_nc_pin - permanently disable pin.
3765  * @dapm: DAPM context
3766  * @pin: pin name
3767  *
3768  * Marks the specified pin as being not connected, disabling it along
3769  * any parent or child widgets.  At present this is identical to
3770  * snd_soc_dapm_disable_pin() but in future it will be extended to do
3771  * additional things such as disabling controls which only affect
3772  * paths through the pin.
3773  *
3774  * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3775  * do any widget power switching.
3776  */
3777 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
3778 {
3779         int ret;
3780
3781         mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3782
3783         ret = snd_soc_dapm_set_pin(dapm, pin, 0);
3784
3785         mutex_unlock(&dapm->card->dapm_mutex);
3786
3787         return ret;
3788 }
3789 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
3790
3791 /**
3792  * snd_soc_dapm_get_pin_status - get audio pin status
3793  * @dapm: DAPM context
3794  * @pin: audio signal pin endpoint (or start point)
3795  *
3796  * Get audio pin status - connected or disconnected.
3797  *
3798  * Returns 1 for connected otherwise 0.
3799  */
3800 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
3801                                 const char *pin)
3802 {
3803         struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
3804
3805         if (w)
3806                 return w->connected;
3807
3808         return 0;
3809 }
3810 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
3811
3812 /**
3813  * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
3814  * @dapm: DAPM context
3815  * @pin: audio signal pin endpoint (or start point)
3816  *
3817  * Mark the given endpoint or pin as ignoring suspend.  When the
3818  * system is disabled a path between two endpoints flagged as ignoring
3819  * suspend will not be disabled.  The path must already be enabled via
3820  * normal means at suspend time, it will not be turned on if it was not
3821  * already enabled.
3822  */
3823 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
3824                                 const char *pin)
3825 {
3826         struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
3827
3828         if (!w) {
3829                 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
3830                 return -EINVAL;
3831         }
3832
3833         w->ignore_suspend = 1;
3834
3835         return 0;
3836 }
3837 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
3838
3839 static bool snd_soc_dapm_widget_in_card_paths(struct snd_soc_card *card,
3840                                               struct snd_soc_dapm_widget *w)
3841 {
3842         struct snd_soc_dapm_path *p;
3843
3844         list_for_each_entry(p, &card->paths, list) {
3845                 if ((p->source == w) || (p->sink == w)) {
3846                         dev_dbg(card->dev,
3847                             "... Path %s(id:%d dapm:%p) - %s(id:%d dapm:%p)\n",
3848                             p->source->name, p->source->id, p->source->dapm,
3849                             p->sink->name, p->sink->id, p->sink->dapm);
3850
3851                         /* Connected to something other than the codec */
3852                         if (p->source->dapm != p->sink->dapm)
3853                                 return true;
3854                         /*
3855                          * Loopback connection from codec external pin to
3856                          * codec external pin
3857                          */
3858                         if (p->sink->id == snd_soc_dapm_input) {
3859                                 switch (p->source->id) {
3860                                 case snd_soc_dapm_output:
3861                                 case snd_soc_dapm_micbias:
3862                                         return true;
3863                                 default:
3864                                         break;
3865                                 }
3866                         }
3867                 }
3868         }
3869
3870         return false;
3871 }
3872
3873 /**
3874  * snd_soc_dapm_auto_nc_codec_pins - call snd_soc_dapm_nc_pin for unused pins
3875  * @codec: The codec whose pins should be processed
3876  *
3877  * Automatically call snd_soc_dapm_nc_pin() for any external pins in the codec
3878  * which are unused. Pins are used if they are connected externally to the
3879  * codec, whether that be to some other device, or a loop-back connection to
3880  * the codec itself.
3881  */
3882 void snd_soc_dapm_auto_nc_codec_pins(struct snd_soc_codec *codec)
3883 {
3884         struct snd_soc_card *card = codec->card;
3885         struct snd_soc_dapm_context *dapm = &codec->dapm;
3886         struct snd_soc_dapm_widget *w;
3887
3888         dev_dbg(codec->dev, "ASoC: Auto NC: DAPMs: card:%p codec:%p\n",
3889                 &card->dapm, &codec->dapm);
3890
3891         list_for_each_entry(w, &card->widgets, list) {
3892                 if (w->dapm != dapm)
3893                         continue;
3894                 switch (w->id) {
3895                 case snd_soc_dapm_input:
3896                 case snd_soc_dapm_output:
3897                 case snd_soc_dapm_micbias:
3898                         dev_dbg(codec->dev, "ASoC: Auto NC: Checking widget %s\n",
3899                                 w->name);
3900                         if (!snd_soc_dapm_widget_in_card_paths(card, w)) {
3901                                 dev_dbg(codec->dev,
3902                                         "... Not in map; disabling\n");
3903                                 snd_soc_dapm_nc_pin(dapm, w->name);
3904                         }
3905                         break;
3906                 default:
3907                         break;
3908                 }
3909         }
3910 }
3911
3912 /**
3913  * snd_soc_dapm_free - free dapm resources
3914  * @dapm: DAPM context
3915  *
3916  * Free all dapm widgets and resources.
3917  */
3918 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
3919 {
3920         snd_soc_dapm_sys_remove(dapm->dev);
3921         dapm_debugfs_cleanup(dapm);
3922         dapm_free_widgets(dapm);
3923         list_del(&dapm->list);
3924 }
3925 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
3926
3927 static void soc_dapm_shutdown_dapm(struct snd_soc_dapm_context *dapm)
3928 {
3929         struct snd_soc_card *card = dapm->card;
3930         struct snd_soc_dapm_widget *w;
3931         LIST_HEAD(down_list);
3932         int powerdown = 0;
3933
3934         mutex_lock(&card->dapm_mutex);
3935
3936         list_for_each_entry(w, &dapm->card->widgets, list) {
3937                 if (w->dapm != dapm)
3938                         continue;
3939                 if (w->power) {
3940                         dapm_seq_insert(w, &down_list, false);
3941                         w->power = 0;
3942                         powerdown = 1;
3943                 }
3944         }
3945
3946         /* If there were no widgets to power down we're already in
3947          * standby.
3948          */
3949         if (powerdown) {
3950                 if (dapm->bias_level == SND_SOC_BIAS_ON)
3951                         snd_soc_dapm_set_bias_level(dapm,
3952                                                     SND_SOC_BIAS_PREPARE);
3953                 dapm_seq_run(card, &down_list, 0, false);
3954                 if (dapm->bias_level == SND_SOC_BIAS_PREPARE)
3955                         snd_soc_dapm_set_bias_level(dapm,
3956                                                     SND_SOC_BIAS_STANDBY);
3957         }
3958
3959         mutex_unlock(&card->dapm_mutex);
3960 }
3961
3962 /*
3963  * snd_soc_dapm_shutdown - callback for system shutdown
3964  */
3965 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
3966 {
3967         struct snd_soc_dapm_context *dapm;
3968
3969         list_for_each_entry(dapm, &card->dapm_list, list) {
3970                 if (dapm != &card->dapm) {
3971                         soc_dapm_shutdown_dapm(dapm);
3972                         if (dapm->bias_level == SND_SOC_BIAS_STANDBY)
3973                                 snd_soc_dapm_set_bias_level(dapm,
3974                                                             SND_SOC_BIAS_OFF);
3975                 }
3976         }
3977
3978         soc_dapm_shutdown_dapm(&card->dapm);
3979         if (card->dapm.bias_level == SND_SOC_BIAS_STANDBY)
3980                 snd_soc_dapm_set_bias_level(&card->dapm,
3981                                             SND_SOC_BIAS_OFF);
3982 }
3983
3984 /* Module information */
3985 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3986 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
3987 MODULE_LICENSE("GPL");