sound/soc/soc-pcm.c

   1 /*
   2  * soc-pcm.c  --  ALSA SoC PCM
   3  *
   4  * Copyright 2005 Wolfson Microelectronics PLC.
   5  * Copyright 2005 Openedhand Ltd.
   6  * Copyright (C) 2010 Slimlogic Ltd.
   7  * Copyright (C) 2010 Texas Instruments Inc.
   8  *
   9  * Authors: Liam Girdwood <lrg@ti.com>
  10  *          Mark Brown <broonie@opensource.wolfsonmicro.com>
  11  *
  12  *  This program is free software; you can redistribute  it and/or modify it
  13  *  under  the terms of  the GNU General  Public License as published by the
  14  *  Free Software Foundation;  either version 2 of the  License, or (at your
  15  *  option) any later version.
  16  *
  17  */
  18
  19 #include <linux/kernel.h>
  20 #include <linux/init.h>
  21 #include <linux/delay.h>
  22 #include <linux/pinctrl/consumer.h>
  23 #include <linux/pm_runtime.h>
  24 #include <linux/slab.h>
  25 #include <linux/workqueue.h>
  26 #include <linux/export.h>
  27 #include <linux/debugfs.h>
  28 #include <sound/core.h>
  29 #include <sound/pcm.h>
  30 #include <sound/pcm_params.h>
  31 #include <sound/soc.h>
  32 #include <sound/soc-dpcm.h>
  33 #include <sound/initval.h>
  34
  35 #define DPCM_MAX_BE_USERS       8
  36
  37 /**
  38  * snd_soc_runtime_activate() - Increment active count for PCM runtime components
  39  * @rtd: ASoC PCM runtime that is activated
  40  * @stream: Direction of the PCM stream
  41  *
  42  * Increments the active count for all the DAIs and components attached to a PCM
  43  * runtime. Should typically be called when a stream is opened.
  44  *
  45  * Must be called with the rtd->pcm_mutex being held
  46  */
  47 void snd_soc_runtime_activate(struct snd_soc_pcm_runtime *rtd, int stream)
  48 {
  49         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  50         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  51
  52         lockdep_assert_held(&rtd->pcm_mutex);
  53
  54         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
  55                 cpu_dai->playback_active++;
  56                 codec_dai->playback_active++;
  57         } else {
  58                 cpu_dai->capture_active++;
  59                 codec_dai->capture_active++;
  60         }
  61
  62         cpu_dai->active++;
  63         codec_dai->active++;
  64         cpu_dai->component->active++;
  65         codec_dai->component->active++;
  66 }
  67
  68 /**
  69  * snd_soc_runtime_deactivate() - Decrement active count for PCM runtime components
  70  * @rtd: ASoC PCM runtime that is deactivated
  71  * @stream: Direction of the PCM stream
  72  *
  73  * Decrements the active count for all the DAIs and components attached to a PCM
  74  * runtime. Should typically be called when a stream is closed.
  75  *
  76  * Must be called with the rtd->pcm_mutex being held
  77  */
  78 void snd_soc_runtime_deactivate(struct snd_soc_pcm_runtime *rtd, int stream)
  79 {
  80         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  81         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  82
  83         lockdep_assert_held(&rtd->pcm_mutex);
  84
  85         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
  86                 cpu_dai->playback_active--;
  87                 codec_dai->playback_active--;
  88         } else {
  89                 cpu_dai->capture_active--;
  90                 codec_dai->capture_active--;
  91         }
  92
  93         cpu_dai->active--;
  94         codec_dai->active--;
  95         cpu_dai->component->active--;
  96         codec_dai->component->active--;
  97 }
  98
  99 /**
 100  * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay
 101  * @rtd: The ASoC PCM runtime that should be checked.
 102  *
 103  * This function checks whether the power down delay should be ignored for a
 104  * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has
 105  * been configured to ignore the delay, or if none of the components benefits
 106  * from having the delay.
 107  */
 108 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd)
 109 {
 110         if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time)
 111                 return true;
 112
 113         return rtd->cpu_dai->component->ignore_pmdown_time &&
 114                         rtd->codec_dai->component->ignore_pmdown_time;
 115 }
 116
 117 /**
 118  * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
 119  * @substream: the pcm substream
 120  * @hw: the hardware parameters
 121  *
 122  * Sets the substream runtime hardware parameters.
 123  */
 124 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
 125         const struct snd_pcm_hardware *hw)
 126 {
 127         struct snd_pcm_runtime *runtime = substream->runtime;
 128         runtime->hw.info = hw->info;
 129         runtime->hw.formats = hw->formats;
 130         runtime->hw.period_bytes_min = hw->period_bytes_min;
 131         runtime->hw.period_bytes_max = hw->period_bytes_max;
 132         runtime->hw.periods_min = hw->periods_min;
 133         runtime->hw.periods_max = hw->periods_max;
 134         runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
 135         runtime->hw.fifo_size = hw->fifo_size;
 136         return 0;
 137 }
 138 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
 139
 140 /* DPCM stream event, send event to FE and all active BEs. */
 141 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
 142         int event)
 143 {
 144         struct snd_soc_dpcm *dpcm;
 145
 146         list_for_each_entry(dpcm, &fe->dpcm[dir].be_clients, list_be) {
 147
 148                 struct snd_soc_pcm_runtime *be = dpcm->be;
 149
 150                 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n",
 151                                 be->dai_link->name, event, dir);
 152
 153                 snd_soc_dapm_stream_event(be, dir, event);
 154         }
 155
 156         snd_soc_dapm_stream_event(fe, dir, event);
 157
 158         return 0;
 159 }
 160
 161 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
 162                                         struct snd_soc_dai *soc_dai)
 163 {
 164         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 165         int ret;
 166
 167         if (soc_dai->rate && (soc_dai->driver->symmetric_rates ||
 168                                 rtd->dai_link->symmetric_rates)) {
 169                 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %dHz rate\n",
 170                                 soc_dai->rate);
 171
 172                 ret = snd_pcm_hw_constraint_minmax(substream->runtime,
 173                                                 SNDRV_PCM_HW_PARAM_RATE,
 174                                                 soc_dai->rate, soc_dai->rate);
 175                 if (ret < 0) {
 176                         dev_err(soc_dai->dev,
 177                                 "ASoC: Unable to apply rate constraint: %d\n",
 178                                 ret);
 179                         return ret;
 180                 }
 181         }
 182
 183         if (soc_dai->channels && (soc_dai->driver->symmetric_channels ||
 184                                 rtd->dai_link->symmetric_channels)) {
 185                 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d channel(s)\n",
 186                                 soc_dai->channels);
 187
 188                 ret = snd_pcm_hw_constraint_minmax(substream->runtime,
 189                                                 SNDRV_PCM_HW_PARAM_CHANNELS,
 190                                                 soc_dai->channels,
 191                                                 soc_dai->channels);
 192                 if (ret < 0) {
 193                         dev_err(soc_dai->dev,
 194                                 "ASoC: Unable to apply channel symmetry constraint: %d\n",
 195                                 ret);
 196                         return ret;
 197                 }
 198         }
 199
 200         if (soc_dai->sample_bits && (soc_dai->driver->symmetric_samplebits ||
 201                                 rtd->dai_link->symmetric_samplebits)) {
 202                 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d sample bits\n",
 203                                 soc_dai->sample_bits);
 204
 205                 ret = snd_pcm_hw_constraint_minmax(substream->runtime,
 206                                                 SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
 207                                                 soc_dai->sample_bits,
 208                                                 soc_dai->sample_bits);
 209                 if (ret < 0) {
 210                         dev_err(soc_dai->dev,
 211                                 "ASoC: Unable to apply sample bits symmetry constraint: %d\n",
 212                                 ret);
 213                         return ret;
 214                 }
 215         }
 216
 217         return 0;
 218 }
 219
 220 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream,
 221                                 struct snd_pcm_hw_params *params)
 222 {
 223         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 224         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 225         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 226         unsigned int rate, channels, sample_bits, symmetry;
 227
 228         rate = params_rate(params);
 229         channels = params_channels(params);
 230         sample_bits = snd_pcm_format_physical_width(params_format(params));
 231
 232         /* reject unmatched parameters when applying symmetry */
 233         symmetry = cpu_dai->driver->symmetric_rates ||
 234                 codec_dai->driver->symmetric_rates ||
 235                 rtd->dai_link->symmetric_rates;
 236         if (symmetry && cpu_dai->rate && cpu_dai->rate != rate) {
 237                 dev_err(rtd->dev, "ASoC: unmatched rate symmetry: %d - %d\n",
 238                                 cpu_dai->rate, rate);
 239                 return -EINVAL;
 240         }
 241
 242         symmetry = cpu_dai->driver->symmetric_channels ||
 243                 codec_dai->driver->symmetric_channels ||
 244                 rtd->dai_link->symmetric_channels;
 245         if (symmetry && cpu_dai->channels && cpu_dai->channels != channels) {
 246                 dev_err(rtd->dev, "ASoC: unmatched channel symmetry: %d - %d\n",
 247                                 cpu_dai->channels, channels);
 248                 return -EINVAL;
 249         }
 250
 251         symmetry = cpu_dai->driver->symmetric_samplebits ||
 252                 codec_dai->driver->symmetric_samplebits ||
 253                 rtd->dai_link->symmetric_samplebits;
 254         if (symmetry && cpu_dai->sample_bits && cpu_dai->sample_bits != sample_bits) {
 255                 dev_err(rtd->dev, "ASoC: unmatched sample bits symmetry: %d - %d\n",
 256                                 cpu_dai->sample_bits, sample_bits);
 257                 return -EINVAL;
 258         }
 259
 260         return 0;
 261 }
 262
 263 static bool soc_pcm_has_symmetry(struct snd_pcm_substream *substream)
 264 {
 265         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 266         struct snd_soc_dai_driver *cpu_driver = rtd->cpu_dai->driver;
 267         struct snd_soc_dai_driver *codec_driver = rtd->codec_dai->driver;
 268         struct snd_soc_dai_link *link = rtd->dai_link;
 269
 270         return cpu_driver->symmetric_rates || codec_driver->symmetric_rates ||
 271                 link->symmetric_rates || cpu_driver->symmetric_channels ||
 272                 codec_driver->symmetric_channels || link->symmetric_channels ||
 273                 cpu_driver->symmetric_samplebits ||
 274                 codec_driver->symmetric_samplebits ||
 275                 link->symmetric_samplebits;
 276 }
 277
 278 /*
 279  * List of sample sizes that might go over the bus for parameter
 280  * application.  There ought to be a wildcard sample size for things
 281  * like the DAC/ADC resolution to use but there isn't right now.
 282  */
 283 static int sample_sizes[] = {
 284         24, 32,
 285 };
 286
 287 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream,
 288                               struct snd_soc_dai *dai)
 289 {
 290         int ret, i, bits;
 291
 292         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 293                 bits = dai->driver->playback.sig_bits;
 294         else
 295                 bits = dai->driver->capture.sig_bits;
 296
 297         if (!bits)
 298                 return;
 299
 300         for (i = 0; i < ARRAY_SIZE(sample_sizes); i++) {
 301                 if (bits >= sample_sizes[i])
 302                         continue;
 303
 304                 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0,
 305                                                    sample_sizes[i], bits);
 306                 if (ret != 0)
 307                         dev_warn(dai->dev,
 308                                  "ASoC: Failed to set MSB %d/%d: %d\n",
 309                                  bits, sample_sizes[i], ret);
 310         }
 311 }
 312
 313 static void soc_pcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
 314         struct snd_soc_pcm_stream *codec_stream,
 315         struct snd_soc_pcm_stream *cpu_stream)
 316 {
 317         struct snd_pcm_hardware *hw = &runtime->hw;
 318
 319         hw->channels_min = max(codec_stream->channels_min,
 320                 cpu_stream->channels_min);
 321         hw->channels_max = min(codec_stream->channels_max,
 322                 cpu_stream->channels_max);
 323         if (hw->formats)
 324                 hw->formats &= codec_stream->formats & cpu_stream->formats;
 325         else
 326                 hw->formats = codec_stream->formats & cpu_stream->formats;
 327         hw->rates = snd_pcm_rate_mask_intersect(codec_stream->rates,
 328                 cpu_stream->rates);
 329
 330         hw->rate_min = 0;
 331         hw->rate_max = UINT_MAX;
 332
 333         snd_pcm_limit_hw_rates(runtime);
 334
 335         hw->rate_min = max(hw->rate_min, cpu_stream->rate_min);
 336         hw->rate_min = max(hw->rate_min, codec_stream->rate_min);
 337         hw->rate_max = min_not_zero(hw->rate_max, cpu_stream->rate_max);
 338         hw->rate_max = min_not_zero(hw->rate_max, codec_stream->rate_max);
 339 }
 340
 341 /*
 342  * Called by ALSA when a PCM substream is opened, the runtime->hw record is
 343  * then initialized and any private data can be allocated. This also calls
 344  * startup for the cpu DAI, platform, machine and codec DAI.
 345  */
 346 static int soc_pcm_open(struct snd_pcm_substream *substream)
 347 {
 348         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 349         struct snd_pcm_runtime *runtime = substream->runtime;
 350         struct snd_soc_platform *platform = rtd->platform;
 351         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 352         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 353         struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
 354         struct snd_soc_dai_driver *codec_dai_drv = codec_dai->driver;
 355         int ret = 0;
 356
 357         pinctrl_pm_select_default_state(cpu_dai->dev);
 358         pinctrl_pm_select_default_state(codec_dai->dev);
 359         pm_runtime_get_sync(cpu_dai->dev);
 360         pm_runtime_get_sync(codec_dai->dev);
 361         pm_runtime_get_sync(platform->dev);
 362
 363         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 364
 365         /* startup the audio subsystem */
 366         if (cpu_dai->driver->ops && cpu_dai->driver->ops->startup) {
 367                 ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
 368                 if (ret < 0) {
 369                         dev_err(cpu_dai->dev, "ASoC: can't open interface"
 370                                 " %s: %d\n", cpu_dai->name, ret);
 371                         goto out;
 372                 }
 373         }
 374
 375         if (platform->driver->ops && platform->driver->ops->open) {
 376                 ret = platform->driver->ops->open(substream);
 377                 if (ret < 0) {
 378                         dev_err(platform->dev, "ASoC: can't open platform"
 379                                 " %s: %d\n", platform->name, ret);
 380                         goto platform_err;
 381                 }
 382         }
 383
 384         if (codec_dai->driver->ops && codec_dai->driver->ops->startup) {
 385                 ret = codec_dai->driver->ops->startup(substream, codec_dai);
 386                 if (ret < 0) {
 387                         dev_err(codec_dai->dev, "ASoC: can't open codec"
 388                                 " %s: %d\n", codec_dai->name, ret);
 389                         goto codec_dai_err;
 390                 }
 391         }
 392
 393         if (rtd->dai_link->ops && rtd->dai_link->ops->startup) {
 394                 ret = rtd->dai_link->ops->startup(substream);
 395                 if (ret < 0) {
 396                         pr_err("ASoC: %s startup failed: %d\n",
 397                                rtd->dai_link->name, ret);
 398                         goto machine_err;
 399                 }
 400         }
 401
 402         /* Dynamic PCM DAI links compat checks use dynamic capabilities */
 403         if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
 404                 goto dynamic;
 405
 406         /* Check that the codec and cpu DAIs are compatible */
 407         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 408                 soc_pcm_init_runtime_hw(runtime, &codec_dai_drv->playback,
 409                         &cpu_dai_drv->playback);
 410         } else {
 411                 soc_pcm_init_runtime_hw(runtime, &codec_dai_drv->capture,
 412                         &cpu_dai_drv->capture);
 413         }
 414
 415         if (soc_pcm_has_symmetry(substream))
 416                 runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
 417
 418         ret = -EINVAL;
 419         if (!runtime->hw.rates) {
 420                 printk(KERN_ERR "ASoC: %s <-> %s No matching rates\n",
 421                         codec_dai->name, cpu_dai->name);
 422                 goto config_err;
 423         }
 424         if (!runtime->hw.formats) {
 425                 printk(KERN_ERR "ASoC: %s <-> %s No matching formats\n",
 426                         codec_dai->name, cpu_dai->name);
 427                 goto config_err;
 428         }
 429         if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
 430             runtime->hw.channels_min > runtime->hw.channels_max) {
 431                 printk(KERN_ERR "ASoC: %s <-> %s No matching channels\n",
 432                                 codec_dai->name, cpu_dai->name);
 433                 goto config_err;
 434         }
 435
 436         soc_pcm_apply_msb(substream, codec_dai);
 437         soc_pcm_apply_msb(substream, cpu_dai);
 438
 439         /* Symmetry only applies if we've already got an active stream. */
 440         if (cpu_dai->active) {
 441                 ret = soc_pcm_apply_symmetry(substream, cpu_dai);
 442                 if (ret != 0)
 443                         goto config_err;
 444         }
 445
 446         if (codec_dai->active) {
 447                 ret = soc_pcm_apply_symmetry(substream, codec_dai);
 448                 if (ret != 0)
 449                         goto config_err;
 450         }
 451
 452         pr_debug("ASoC: %s <-> %s info:\n",
 453                         codec_dai->name, cpu_dai->name);
 454         pr_debug("ASoC: rate mask 0x%x\n", runtime->hw.rates);
 455         pr_debug("ASoC: min ch %d max ch %d\n", runtime->hw.channels_min,
 456                  runtime->hw.channels_max);
 457         pr_debug("ASoC: min rate %d max rate %d\n", runtime->hw.rate_min,
 458                  runtime->hw.rate_max);
 459
 460 dynamic:
 461
 462         snd_soc_runtime_activate(rtd, substream->stream);
 463
 464         mutex_unlock(&rtd->pcm_mutex);
 465         return 0;
 466
 467 config_err:
 468         if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
 469                 rtd->dai_link->ops->shutdown(substream);
 470
 471 machine_err:
 472         if (codec_dai->driver->ops->shutdown)
 473                 codec_dai->driver->ops->shutdown(substream, codec_dai);
 474
 475 codec_dai_err:
 476         if (platform->driver->ops && platform->driver->ops->close)
 477                 platform->driver->ops->close(substream);
 478
 479 platform_err:
 480         if (cpu_dai->driver->ops->shutdown)
 481                 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
 482 out:
 483         mutex_unlock(&rtd->pcm_mutex);
 484
 485         pm_runtime_put(platform->dev);
 486         pm_runtime_put(codec_dai->dev);
 487         pm_runtime_put(cpu_dai->dev);
 488         if (!codec_dai->active)
 489                 pinctrl_pm_select_sleep_state(codec_dai->dev);
 490         if (!cpu_dai->active)
 491                 pinctrl_pm_select_sleep_state(cpu_dai->dev);
 492
 493         return ret;
 494 }
 495
 496 /*
 497  * Power down the audio subsystem pmdown_time msecs after close is called.
 498  * This is to ensure there are no pops or clicks in between any music tracks
 499  * due to DAPM power cycling.
 500  */
 501 static void close_delayed_work(struct work_struct *work)
 502 {
 503         struct snd_soc_pcm_runtime *rtd =
 504                         container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
 505         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 506
 507         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 508
 509         dev_dbg(rtd->dev, "ASoC: pop wq checking: %s status: %s waiting: %s\n",
 510                  codec_dai->driver->playback.stream_name,
 511                  codec_dai->playback_active ? "active" : "inactive",
 512                  rtd->pop_wait ? "yes" : "no");
 513
 514         /* are we waiting on this codec DAI stream */
 515         if (rtd->pop_wait == 1) {
 516                 rtd->pop_wait = 0;
 517                 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
 518                                           SND_SOC_DAPM_STREAM_STOP);
 519         }
 520
 521         mutex_unlock(&rtd->pcm_mutex);
 522 }
 523
 524 /*
 525  * Called by ALSA when a PCM substream is closed. Private data can be
 526  * freed here. The cpu DAI, codec DAI, machine and platform are also
 527  * shutdown.
 528  */
 529 static int soc_pcm_close(struct snd_pcm_substream *substream)
 530 {
 531         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 532         struct snd_soc_platform *platform = rtd->platform;
 533         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 534         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 535
 536         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 537
 538         snd_soc_runtime_deactivate(rtd, substream->stream);
 539
 540         /* clear the corresponding DAIs rate when inactive */
 541         if (!cpu_dai->active)
 542                 cpu_dai->rate = 0;
 543
 544         if (!codec_dai->active)
 545                 codec_dai->rate = 0;
 546
 547         if (cpu_dai->driver->ops->shutdown)
 548                 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
 549
 550         if (codec_dai->driver->ops->shutdown)
 551                 codec_dai->driver->ops->shutdown(substream, codec_dai);
 552
 553         if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
 554                 rtd->dai_link->ops->shutdown(substream);
 555
 556         if (platform->driver->ops && platform->driver->ops->close)
 557                 platform->driver->ops->close(substream);
 558         cpu_dai->runtime = NULL;
 559
 560         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 561                 if (snd_soc_runtime_ignore_pmdown_time(rtd)) {
 562                         /* powered down playback stream now */
 563                         snd_soc_dapm_stream_event(rtd,
 564                                                   SNDRV_PCM_STREAM_PLAYBACK,
 565                                                   SND_SOC_DAPM_STREAM_STOP);
 566                 } else {
 567                         /* start delayed pop wq here for playback streams */
 568                         rtd->pop_wait = 1;
 569                         queue_delayed_work(system_power_efficient_wq,
 570                                            &rtd->delayed_work,
 571                                            msecs_to_jiffies(rtd->pmdown_time));
 572                 }
 573         } else {
 574                 /* capture streams can be powered down now */
 575                 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
 576                                           SND_SOC_DAPM_STREAM_STOP);
 577         }
 578
 579         mutex_unlock(&rtd->pcm_mutex);
 580
 581         pm_runtime_put(platform->dev);
 582         pm_runtime_put(codec_dai->dev);
 583         pm_runtime_put(cpu_dai->dev);
 584         if (!codec_dai->active)
 585                 pinctrl_pm_select_sleep_state(codec_dai->dev);
 586         if (!cpu_dai->active)
 587                 pinctrl_pm_select_sleep_state(cpu_dai->dev);
 588
 589         return 0;
 590 }
 591
 592 /*
 593  * Called by ALSA when the PCM substream is prepared, can set format, sample
 594  * rate, etc.  This function is non atomic and can be called multiple times,
 595  * it can refer to the runtime info.
 596  */
 597 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
 598 {
 599         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 600         struct snd_soc_platform *platform = rtd->platform;
 601         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 602         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 603         int ret = 0;
 604
 605         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 606
 607         if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
 608                 ret = rtd->dai_link->ops->prepare(substream);
 609                 if (ret < 0) {
 610                         dev_err(rtd->card->dev, "ASoC: machine prepare error:"
 611                                 " %d\n", ret);
 612                         goto out;
 613                 }
 614         }
 615
 616         if (platform->driver->ops && platform->driver->ops->prepare) {
 617                 ret = platform->driver->ops->prepare(substream);
 618                 if (ret < 0) {
 619                         dev_err(platform->dev, "ASoC: platform prepare error:"
 620                                 " %d\n", ret);
 621                         goto out;
 622                 }
 623         }
 624
 625         if (codec_dai->driver->ops && codec_dai->driver->ops->prepare) {
 626                 ret = codec_dai->driver->ops->prepare(substream, codec_dai);
 627                 if (ret < 0) {
 628                         dev_err(codec_dai->dev, "ASoC: DAI prepare error: %d\n",
 629                                 ret);
 630                         goto out;
 631                 }
 632         }
 633
 634         if (cpu_dai->driver->ops && cpu_dai->driver->ops->prepare) {
 635                 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
 636                 if (ret < 0) {
 637                         dev_err(cpu_dai->dev, "ASoC: DAI prepare error: %d\n",
 638                                 ret);
 639                         goto out;
 640                 }
 641         }
 642
 643         /* cancel any delayed stream shutdown that is pending */
 644         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 645             rtd->pop_wait) {
 646                 rtd->pop_wait = 0;
 647                 cancel_delayed_work(&rtd->delayed_work);
 648         }
 649
 650         snd_soc_dapm_stream_event(rtd, substream->stream,
 651                         SND_SOC_DAPM_STREAM_START);
 652
 653         snd_soc_dai_digital_mute(codec_dai, 0, substream->stream);
 654
 655 out:
 656         mutex_unlock(&rtd->pcm_mutex);
 657         return ret;
 658 }
 659
 660 /*
 661  * Called by ALSA when the hardware params are set by application. This
 662  * function can also be called multiple times and can allocate buffers
 663  * (using snd_pcm_lib_* ). It's non-atomic.
 664  */
 665 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
 666                                 struct snd_pcm_hw_params *params)
 667 {
 668         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 669         struct snd_soc_platform *platform = rtd->platform;
 670         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 671         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 672         int ret = 0;
 673
 674         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 675
 676         ret = soc_pcm_params_symmetry(substream, params);
 677         if (ret)
 678                 goto out;
 679
 680         if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
 681                 ret = rtd->dai_link->ops->hw_params(substream, params);
 682                 if (ret < 0) {
 683                         dev_err(rtd->card->dev, "ASoC: machine hw_params"
 684                                 " failed: %d\n", ret);
 685                         goto out;
 686                 }
 687         }
 688
 689         if (codec_dai->driver->ops && codec_dai->driver->ops->hw_params) {
 690                 ret = codec_dai->driver->ops->hw_params(substream, params, codec_dai);
 691                 if (ret < 0) {
 692                         dev_err(codec_dai->dev, "ASoC: can't set %s hw params:"
 693                                 " %d\n", codec_dai->name, ret);
 694                         goto codec_err;
 695                 }
 696         }
 697
 698         if (cpu_dai->driver->ops && cpu_dai->driver->ops->hw_params) {
 699                 ret = cpu_dai->driver->ops->hw_params(substream, params, cpu_dai);
 700                 if (ret < 0) {
 701                         dev_err(cpu_dai->dev, "ASoC: %s hw params failed: %d\n",
 702                                 cpu_dai->name, ret);
 703                         goto interface_err;
 704                 }
 705         }
 706
 707         if (platform->driver->ops && platform->driver->ops->hw_params) {
 708                 ret = platform->driver->ops->hw_params(substream, params);
 709                 if (ret < 0) {
 710                         dev_err(platform->dev, "ASoC: %s hw params failed: %d\n",
 711                                platform->name, ret);
 712                         goto platform_err;
 713                 }
 714         }
 715
 716         /* store the parameters for each DAIs */
 717         cpu_dai->rate = params_rate(params);
 718         cpu_dai->channels = params_channels(params);
 719         cpu_dai->sample_bits =
 720                 snd_pcm_format_physical_width(params_format(params));
 721
 722         codec_dai->rate = params_rate(params);
 723         codec_dai->channels = params_channels(params);
 724         codec_dai->sample_bits =
 725                 snd_pcm_format_physical_width(params_format(params));
 726
 727 out:
 728         mutex_unlock(&rtd->pcm_mutex);
 729         return ret;
 730
 731 platform_err:
 732         if (cpu_dai->driver->ops && cpu_dai->driver->ops->hw_free)
 733                 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
 734
 735 interface_err:
 736         if (codec_dai->driver->ops && codec_dai->driver->ops->hw_free)
 737                 codec_dai->driver->ops->hw_free(substream, codec_dai);
 738
 739 codec_err:
 740         if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
 741                 rtd->dai_link->ops->hw_free(substream);
 742
 743         mutex_unlock(&rtd->pcm_mutex);
 744         return ret;
 745 }
 746
 747 /*
 748  * Frees resources allocated by hw_params, can be called multiple times
 749  */
 750 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
 751 {
 752         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 753         struct snd_soc_platform *platform = rtd->platform;
 754         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 755         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 756         bool playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
 757
 758         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 759
 760         /* clear the corresponding DAIs parameters when going to be inactive */
 761         if (cpu_dai->active == 1) {
 762                 cpu_dai->rate = 0;
 763                 cpu_dai->channels = 0;
 764                 cpu_dai->sample_bits = 0;
 765         }
 766
 767         if (codec_dai->active == 1) {
 768                 codec_dai->rate = 0;
 769                 codec_dai->channels = 0;
 770                 codec_dai->sample_bits = 0;
 771         }
 772
 773         /* apply codec digital mute */
 774         if ((playback && codec_dai->playback_active == 1) ||
 775             (!playback && codec_dai->capture_active == 1))
 776                 snd_soc_dai_digital_mute(codec_dai, 1, substream->stream);
 777
 778         /* free any machine hw params */
 779         if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
 780                 rtd->dai_link->ops->hw_free(substream);
 781
 782         /* free any DMA resources */
 783         if (platform->driver->ops && platform->driver->ops->hw_free)
 784                 platform->driver->ops->hw_free(substream);
 785
 786         /* now free hw params for the DAIs  */
 787         if (codec_dai->driver->ops && codec_dai->driver->ops->hw_free)
 788                 codec_dai->driver->ops->hw_free(substream, codec_dai);
 789
 790         if (cpu_dai->driver->ops && cpu_dai->driver->ops->hw_free)
 791                 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
 792
 793         mutex_unlock(&rtd->pcm_mutex);
 794         return 0;
 795 }
 796
 797 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 798 {
 799         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 800         struct snd_soc_platform *platform = rtd->platform;
 801         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 802         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 803         int ret;
 804
 805         if (codec_dai->driver->ops && codec_dai->driver->ops->trigger) {
 806                 ret = codec_dai->driver->ops->trigger(substream, cmd, codec_dai);
 807                 if (ret < 0)
 808                         return ret;
 809         }
 810
 811         if (platform->driver->ops && platform->driver->ops->trigger) {
 812                 ret = platform->driver->ops->trigger(substream, cmd);
 813                 if (ret < 0)
 814                         return ret;
 815         }
 816
 817         if (cpu_dai->driver->ops && cpu_dai->driver->ops->trigger) {
 818                 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
 819                 if (ret < 0)
 820                         return ret;
 821         }
 822         return 0;
 823 }
 824
 825 static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
 826                                    int cmd)
 827 {
 828         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 829         struct snd_soc_platform *platform = rtd->platform;
 830         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 831         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 832         int ret;
 833
 834         if (codec_dai->driver->ops &&
 835             codec_dai->driver->ops->bespoke_trigger) {
 836                 ret = codec_dai->driver->ops->bespoke_trigger(substream, cmd, codec_dai);
 837                 if (ret < 0)
 838                         return ret;
 839         }
 840
 841         if (platform->driver->bespoke_trigger) {
 842                 ret = platform->driver->bespoke_trigger(substream, cmd);
 843                 if (ret < 0)
 844                         return ret;
 845         }
 846
 847         if (cpu_dai->driver->ops && cpu_dai->driver->ops->bespoke_trigger) {
 848                 ret = cpu_dai->driver->ops->bespoke_trigger(substream, cmd, cpu_dai);
 849                 if (ret < 0)
 850                         return ret;
 851         }
 852         return 0;
 853 }
 854 /*
 855  * soc level wrapper for pointer callback
 856  * If cpu_dai, codec_dai, platform driver has the delay callback, than
 857  * the runtime->delay will be updated accordingly.
 858  */
 859 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
 860 {
 861         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 862         struct snd_soc_platform *platform = rtd->platform;
 863         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 864         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 865         struct snd_pcm_runtime *runtime = substream->runtime;
 866         snd_pcm_uframes_t offset = 0;
 867         snd_pcm_sframes_t delay = 0;
 868
 869         if (platform->driver->ops && platform->driver->ops->pointer)
 870                 offset = platform->driver->ops->pointer(substream);
 871
 872         if (cpu_dai->driver->ops && cpu_dai->driver->ops->delay)
 873                 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
 874
 875         if (codec_dai->driver->ops && codec_dai->driver->ops->delay)
 876                 delay += codec_dai->driver->ops->delay(substream, codec_dai);
 877
 878         if (platform->driver->delay)
 879                 delay += platform->driver->delay(substream, codec_dai);
 880
 881         runtime->delay = delay;
 882
 883         return offset;
 884 }
 885
 886 /* connect a FE and BE */
 887 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
 888                 struct snd_soc_pcm_runtime *be, int stream)
 889 {
 890         struct snd_soc_dpcm *dpcm;
 891
 892         /* only add new dpcms */
 893         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
 894                 if (dpcm->be == be && dpcm->fe == fe)
 895                         return 0;
 896         }
 897
 898         dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
 899         if (!dpcm)
 900                 return -ENOMEM;
 901
 902         dpcm->be = be;
 903         dpcm->fe = fe;
 904         be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
 905         dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
 906         list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
 907         list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
 908
 909         dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
 910                         stream ? "capture" : "playback",  fe->dai_link->name,
 911                         stream ? "<-" : "->", be->dai_link->name);
 912
 913 #ifdef CONFIG_DEBUG_FS
 914         dpcm->debugfs_state = debugfs_create_u32(be->dai_link->name, 0644,
 915                         fe->debugfs_dpcm_root, &dpcm->state);
 916 #endif
 917         return 1;
 918 }
 919
 920 /* reparent a BE onto another FE */
 921 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
 922                         struct snd_soc_pcm_runtime *be, int stream)
 923 {
 924         struct snd_soc_dpcm *dpcm;
 925         struct snd_pcm_substream *fe_substream, *be_substream;
 926
 927         /* reparent if BE is connected to other FEs */
 928         if (!be->dpcm[stream].users)
 929                 return;
 930
 931         be_substream = snd_soc_dpcm_get_substream(be, stream);
 932
 933         list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
 934                 if (dpcm->fe == fe)
 935                         continue;
 936
 937                 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
 938                         stream ? "capture" : "playback",
 939                         dpcm->fe->dai_link->name,
 940                         stream ? "<-" : "->", dpcm->be->dai_link->name);
 941
 942                 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
 943                 be_substream->runtime = fe_substream->runtime;
 944                 break;
 945         }
 946 }
 947
 948 /* disconnect a BE and FE */
 949 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
 950 {
 951         struct snd_soc_dpcm *dpcm, *d;
 952
 953         list_for_each_entry_safe(dpcm, d, &fe->dpcm[stream].be_clients, list_be) {
 954                 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
 955                                 stream ? "capture" : "playback",
 956                                 dpcm->be->dai_link->name);
 957
 958                 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
 959                         continue;
 960
 961                 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
 962                         stream ? "capture" : "playback", fe->dai_link->name,
 963                         stream ? "<-" : "->", dpcm->be->dai_link->name);
 964
 965                 /* BEs still alive need new FE */
 966                 dpcm_be_reparent(fe, dpcm->be, stream);
 967
 968 #ifdef CONFIG_DEBUG_FS
 969                 debugfs_remove(dpcm->debugfs_state);
 970 #endif
 971                 list_del(&dpcm->list_be);
 972                 list_del(&dpcm->list_fe);
 973                 kfree(dpcm);
 974         }
 975 }
 976
 977 /* get BE for DAI widget and stream */
 978 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
 979                 struct snd_soc_dapm_widget *widget, int stream)
 980 {
 981         struct snd_soc_pcm_runtime *be;
 982         int i;
 983
 984         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
 985                 for (i = 0; i < card->num_links; i++) {
 986                         be = &card->rtd[i];
 987
 988                         if (!be->dai_link->no_pcm)
 989                                 continue;
 990
 991                         if (be->cpu_dai->playback_widget == widget ||
 992                                 be->codec_dai->playback_widget == widget)
 993                                 return be;
 994                 }
 995         } else {
 996
 997                 for (i = 0; i < card->num_links; i++) {
 998                         be = &card->rtd[i];
 999
1000                         if (!be->dai_link->no_pcm)
1001                                 continue;
1002
1003                         if (be->cpu_dai->capture_widget == widget ||
1004                                 be->codec_dai->capture_widget == widget)
1005                                 return be;
1006                 }
1007         }
1008
1009         dev_err(card->dev, "ASoC: can't get %s BE for %s\n",
1010                 stream ? "capture" : "playback", widget->name);
1011         return NULL;
1012 }
1013
1014 static inline struct snd_soc_dapm_widget *
1015         rtd_get_cpu_widget(struct snd_soc_pcm_runtime *rtd, int stream)
1016 {
1017         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1018                 return rtd->cpu_dai->playback_widget;
1019         else
1020                 return rtd->cpu_dai->capture_widget;
1021 }
1022
1023 static inline struct snd_soc_dapm_widget *
1024         rtd_get_codec_widget(struct snd_soc_pcm_runtime *rtd, int stream)
1025 {
1026         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1027                 return rtd->codec_dai->playback_widget;
1028         else
1029                 return rtd->codec_dai->capture_widget;
1030 }
1031
1032 static int widget_in_list(struct snd_soc_dapm_widget_list *list,
1033                 struct snd_soc_dapm_widget *widget)
1034 {
1035         int i;
1036
1037         for (i = 0; i < list->num_widgets; i++) {
1038                 if (widget == list->widgets[i])
1039                         return 1;
1040         }
1041
1042         return 0;
1043 }
1044
1045 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1046         int stream, struct snd_soc_dapm_widget_list **list_)
1047 {
1048         struct snd_soc_dai *cpu_dai = fe->cpu_dai;
1049         struct snd_soc_dapm_widget_list *list;
1050         int paths;
1051
1052         list = kzalloc(sizeof(struct snd_soc_dapm_widget_list) +
1053                         sizeof(struct snd_soc_dapm_widget *), GFP_KERNEL);
1054         if (list == NULL)
1055                 return -ENOMEM;
1056
1057         /* get number of valid DAI paths and their widgets */
1058         paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, &list);
1059
1060         dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1061                         stream ? "capture" : "playback");
1062
1063         *list_ = list;
1064         return paths;
1065 }
1066
1067 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1068         struct snd_soc_dapm_widget_list **list_)
1069 {
1070         struct snd_soc_dpcm *dpcm;
1071         struct snd_soc_dapm_widget_list *list = *list_;
1072         struct snd_soc_dapm_widget *widget;
1073         int prune = 0;
1074
1075         /* Destroy any old FE <--> BE connections */
1076         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1077
1078                 /* is there a valid CPU DAI widget for this BE */
1079                 widget = rtd_get_cpu_widget(dpcm->be, stream);
1080
1081                 /* prune the BE if it's no longer in our active list */
1082                 if (widget && widget_in_list(list, widget))
1083                         continue;
1084
1085                 /* is there a valid CODEC DAI widget for this BE */
1086                 widget = rtd_get_codec_widget(dpcm->be, stream);
1087
1088                 /* prune the BE if it's no longer in our active list */
1089                 if (widget && widget_in_list(list, widget))
1090                         continue;
1091
1092                 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1093                         stream ? "capture" : "playback",
1094                         dpcm->be->dai_link->name, fe->dai_link->name);
1095                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1096                 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1097                 prune++;
1098         }
1099
1100         dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1101         return prune;
1102 }
1103
1104 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1105         struct snd_soc_dapm_widget_list **list_)
1106 {
1107         struct snd_soc_card *card = fe->card;
1108         struct snd_soc_dapm_widget_list *list = *list_;
1109         struct snd_soc_pcm_runtime *be;
1110         int i, new = 0, err;
1111
1112         /* Create any new FE <--> BE connections */
1113         for (i = 0; i < list->num_widgets; i++) {
1114
1115                 switch (list->widgets[i]->id) {
1116                 case snd_soc_dapm_dai_in:
1117                 case snd_soc_dapm_dai_out:
1118                         break;
1119                 default:
1120                         continue;
1121                 }
1122
1123                 /* is there a valid BE rtd for this widget */
1124                 be = dpcm_get_be(card, list->widgets[i], stream);
1125                 if (!be) {
1126                         dev_err(fe->dev, "ASoC: no BE found for %s\n",
1127                                         list->widgets[i]->name);
1128                         continue;
1129                 }
1130
1131                 /* make sure BE is a real BE */
1132                 if (!be->dai_link->no_pcm)
1133                         continue;
1134
1135                 /* don't connect if FE is not running */
1136                 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
1137                         continue;
1138
1139                 /* newly connected FE and BE */
1140                 err = dpcm_be_connect(fe, be, stream);
1141                 if (err < 0) {
1142                         dev_err(fe->dev, "ASoC: can't connect %s\n",
1143                                 list->widgets[i]->name);
1144                         break;
1145                 } else if (err == 0) /* already connected */
1146                         continue;
1147
1148                 /* new */
1149                 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1150                 new++;
1151         }
1152
1153         dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1154         return new;
1155 }
1156
1157 /*
1158  * Find the corresponding BE DAIs that source or sink audio to this
1159  * FE substream.
1160  */
1161 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1162         int stream, struct snd_soc_dapm_widget_list **list, int new)
1163 {
1164         if (new)
1165                 return dpcm_add_paths(fe, stream, list);
1166         else
1167                 return dpcm_prune_paths(fe, stream, list);
1168 }
1169
1170 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1171 {
1172         struct snd_soc_dpcm *dpcm;
1173
1174         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
1175                 dpcm->be->dpcm[stream].runtime_update =
1176                                                 SND_SOC_DPCM_UPDATE_NO;
1177 }
1178
1179 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
1180         int stream)
1181 {
1182         struct snd_soc_dpcm *dpcm;
1183
1184         /* disable any enabled and non active backends */
1185         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1186
1187                 struct snd_soc_pcm_runtime *be = dpcm->be;
1188                 struct snd_pcm_substream *be_substream =
1189                         snd_soc_dpcm_get_substream(be, stream);
1190
1191                 if (be->dpcm[stream].users == 0)
1192                         dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1193                                 stream ? "capture" : "playback",
1194                                 be->dpcm[stream].state);
1195
1196                 if (--be->dpcm[stream].users != 0)
1197                         continue;
1198
1199                 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1200                         continue;
1201
1202                 soc_pcm_close(be_substream);
1203                 be_substream->runtime = NULL;
1204                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1205         }
1206 }
1207
1208 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1209 {
1210         struct snd_soc_dpcm *dpcm;
1211         int err, count = 0;
1212
1213         /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1214         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1215
1216                 struct snd_soc_pcm_runtime *be = dpcm->be;
1217                 struct snd_pcm_substream *be_substream =
1218                         snd_soc_dpcm_get_substream(be, stream);
1219
1220                 if (!be_substream) {
1221                         dev_err(be->dev, "ASoC: no backend %s stream\n",
1222                                 stream ? "capture" : "playback");
1223                         continue;
1224                 }
1225
1226                 /* is this op for this BE ? */
1227                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1228                         continue;
1229
1230                 /* first time the dpcm is open ? */
1231                 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
1232                         dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1233                                 stream ? "capture" : "playback",
1234                                 be->dpcm[stream].state);
1235
1236                 if (be->dpcm[stream].users++ != 0)
1237                         continue;
1238
1239                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1240                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1241                         continue;
1242
1243                 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1244                         stream ? "capture" : "playback", be->dai_link->name);
1245
1246                 be_substream->runtime = be->dpcm[stream].runtime;
1247                 err = soc_pcm_open(be_substream);
1248                 if (err < 0) {
1249                         dev_err(be->dev, "ASoC: BE open failed %d\n", err);
1250                         be->dpcm[stream].users--;
1251                         if (be->dpcm[stream].users < 0)
1252                                 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1253                                         stream ? "capture" : "playback",
1254                                         be->dpcm[stream].state);
1255
1256                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1257                         goto unwind;
1258                 }
1259
1260                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1261                 count++;
1262         }
1263
1264         return count;
1265
1266 unwind:
1267         /* disable any enabled and non active backends */
1268         list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1269                 struct snd_soc_pcm_runtime *be = dpcm->be;
1270                 struct snd_pcm_substream *be_substream =
1271                         snd_soc_dpcm_get_substream(be, stream);
1272
1273                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1274                         continue;
1275
1276                 if (be->dpcm[stream].users == 0)
1277                         dev_err(be->dev, "ASoC: no users %s at close %d\n",
1278                                 stream ? "capture" : "playback",
1279                                 be->dpcm[stream].state);
1280
1281                 if (--be->dpcm[stream].users != 0)
1282                         continue;
1283
1284                 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1285                         continue;
1286
1287                 soc_pcm_close(be_substream);
1288                 be_substream->runtime = NULL;
1289                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1290         }
1291
1292         return err;
1293 }
1294
1295 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
1296         struct snd_soc_pcm_stream *stream)
1297 {
1298         runtime->hw.rate_min = stream->rate_min;
1299         runtime->hw.rate_max = stream->rate_max;
1300         runtime->hw.channels_min = stream->channels_min;
1301         runtime->hw.channels_max = stream->channels_max;
1302         if (runtime->hw.formats)
1303                 runtime->hw.formats &= stream->formats;
1304         else
1305                 runtime->hw.formats = stream->formats;
1306         runtime->hw.rates = stream->rates;
1307 }
1308
1309 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
1310 {
1311         struct snd_pcm_runtime *runtime = substream->runtime;
1312         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1313         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1314         struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
1315
1316         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1317                 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback);
1318         else
1319                 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture);
1320 }
1321
1322 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1323 {
1324         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1325         struct snd_pcm_runtime *runtime = fe_substream->runtime;
1326         int stream = fe_substream->stream, ret = 0;
1327
1328         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1329
1330         ret = dpcm_be_dai_startup(fe, fe_substream->stream);
1331         if (ret < 0) {
1332                 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
1333                 goto be_err;
1334         }
1335
1336         dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1337
1338         /* start the DAI frontend */
1339         ret = soc_pcm_open(fe_substream);
1340         if (ret < 0) {
1341                 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
1342                 goto unwind;
1343         }
1344
1345         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1346
1347         dpcm_set_fe_runtime(fe_substream);
1348         snd_pcm_limit_hw_rates(runtime);
1349
1350         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1351         return 0;
1352
1353 unwind:
1354         dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
1355 be_err:
1356         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1357         return ret;
1358 }
1359
1360 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1361 {
1362         struct snd_soc_dpcm *dpcm;
1363
1364         /* only shutdown BEs that are either sinks or sources to this FE DAI */
1365         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1366
1367                 struct snd_soc_pcm_runtime *be = dpcm->be;
1368                 struct snd_pcm_substream *be_substream =
1369                         snd_soc_dpcm_get_substream(be, stream);
1370
1371                 /* is this op for this BE ? */
1372                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1373                         continue;
1374
1375                 if (be->dpcm[stream].users == 0)
1376                         dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1377                                 stream ? "capture" : "playback",
1378                                 be->dpcm[stream].state);
1379
1380                 if (--be->dpcm[stream].users != 0)
1381                         continue;
1382
1383                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1384                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN))
1385                         continue;
1386
1387                 dev_dbg(be->dev, "ASoC: close BE %s\n",
1388                         dpcm->fe->dai_link->name);
1389
1390                 soc_pcm_close(be_substream);
1391                 be_substream->runtime = NULL;
1392
1393                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1394         }
1395         return 0;
1396 }
1397
1398 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
1399 {
1400         struct snd_soc_pcm_runtime *fe = substream->private_data;
1401         int stream = substream->stream;
1402
1403         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1404
1405         /* shutdown the BEs */
1406         dpcm_be_dai_shutdown(fe, substream->stream);
1407
1408         dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
1409
1410         /* now shutdown the frontend */
1411         soc_pcm_close(substream);
1412
1413         /* run the stream event for each BE */
1414         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
1415
1416         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1417         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1418         return 0;
1419 }
1420
1421 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
1422 {
1423         struct snd_soc_dpcm *dpcm;
1424
1425         /* only hw_params backends that are either sinks or sources
1426          * to this frontend DAI */
1427         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1428
1429                 struct snd_soc_pcm_runtime *be = dpcm->be;
1430                 struct snd_pcm_substream *be_substream =
1431                         snd_soc_dpcm_get_substream(be, stream);
1432
1433                 /* is this op for this BE ? */
1434                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1435                         continue;
1436
1437                 /* only free hw when no longer used - check all FEs */
1438                 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1439                                 continue;
1440
1441                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1442                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1443                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1444                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
1445                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1446                         continue;
1447
1448                 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
1449                         dpcm->fe->dai_link->name);
1450
1451                 soc_pcm_hw_free(be_substream);
1452
1453                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1454         }
1455
1456         return 0;
1457 }
1458
1459 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
1460 {
1461         struct snd_soc_pcm_runtime *fe = substream->private_data;
1462         int err, stream = substream->stream;
1463
1464         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1465         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1466
1467         dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
1468
1469         /* call hw_free on the frontend */
1470         err = soc_pcm_hw_free(substream);
1471         if (err < 0)
1472                 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
1473                         fe->dai_link->name);
1474
1475         /* only hw_params backends that are either sinks or sources
1476          * to this frontend DAI */
1477         err = dpcm_be_dai_hw_free(fe, stream);
1478
1479         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1480         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1481
1482         mutex_unlock(&fe->card->mutex);
1483         return 0;
1484 }
1485
1486 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
1487 {
1488         struct snd_soc_dpcm *dpcm;
1489         int ret;
1490
1491         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1492
1493                 struct snd_soc_pcm_runtime *be = dpcm->be;
1494                 struct snd_pcm_substream *be_substream =
1495                         snd_soc_dpcm_get_substream(be, stream);
1496
1497                 /* is this op for this BE ? */
1498                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1499                         continue;
1500
1501                 /* only allow hw_params() if no connected FEs are running */
1502                 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
1503                         continue;
1504
1505                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
1506                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1507                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
1508                         continue;
1509
1510                 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
1511                         dpcm->fe->dai_link->name);
1512
1513                 /* copy params for each dpcm */
1514                 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
1515                                 sizeof(struct snd_pcm_hw_params));
1516
1517                 /* perform any hw_params fixups */
1518                 if (be->dai_link->be_hw_params_fixup) {
1519                         ret = be->dai_link->be_hw_params_fixup(be,
1520                                         &dpcm->hw_params);
1521                         if (ret < 0) {
1522                                 dev_err(be->dev,
1523                                         "ASoC: hw_params BE fixup failed %d\n",
1524                                         ret);
1525                                 goto unwind;
1526                         }
1527                 }
1528
1529                 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
1530                 if (ret < 0) {
1531                         dev_err(dpcm->be->dev,
1532                                 "ASoC: hw_params BE failed %d\n", ret);
1533                         goto unwind;
1534                 }
1535
1536                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
1537         }
1538         return 0;
1539
1540 unwind:
1541         /* disable any enabled and non active backends */
1542         list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1543                 struct snd_soc_pcm_runtime *be = dpcm->be;
1544                 struct snd_pcm_substream *be_substream =
1545                         snd_soc_dpcm_get_substream(be, stream);
1546
1547                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1548                         continue;
1549
1550                 /* only allow hw_free() if no connected FEs are running */
1551                 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1552                         continue;
1553
1554                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
1555                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1556                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1557                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1558                         continue;
1559
1560                 soc_pcm_hw_free(be_substream);
1561         }
1562
1563         return ret;
1564 }
1565
1566 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
1567                                  struct snd_pcm_hw_params *params)
1568 {
1569         struct snd_soc_pcm_runtime *fe = substream->private_data;
1570         int ret, stream = substream->stream;
1571
1572         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1573         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1574
1575         memcpy(&fe->dpcm[substream->stream].hw_params, params,
1576                         sizeof(struct snd_pcm_hw_params));
1577         ret = dpcm_be_dai_hw_params(fe, substream->stream);
1578         if (ret < 0) {
1579                 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
1580                 goto out;
1581         }
1582
1583         dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
1584                         fe->dai_link->name, params_rate(params),
1585                         params_channels(params), params_format(params));
1586
1587         /* call hw_params on the frontend */
1588         ret = soc_pcm_hw_params(substream, params);
1589         if (ret < 0) {
1590                 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
1591                 dpcm_be_dai_hw_free(fe, stream);
1592          } else
1593                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
1594
1595 out:
1596         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1597         mutex_unlock(&fe->card->mutex);
1598         return ret;
1599 }
1600
1601 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
1602                 struct snd_pcm_substream *substream, int cmd)
1603 {
1604         int ret;
1605
1606         dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n",
1607                         dpcm->fe->dai_link->name, cmd);
1608
1609         ret = soc_pcm_trigger(substream, cmd);
1610         if (ret < 0)
1611                 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret);
1612
1613         return ret;
1614 }
1615
1616 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
1617                                int cmd)
1618 {
1619         struct snd_soc_dpcm *dpcm;
1620         int ret = 0;
1621
1622         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1623
1624                 struct snd_soc_pcm_runtime *be = dpcm->be;
1625                 struct snd_pcm_substream *be_substream =
1626                         snd_soc_dpcm_get_substream(be, stream);
1627
1628                 /* is this op for this BE ? */
1629                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1630                         continue;
1631
1632                 switch (cmd) {
1633                 case SNDRV_PCM_TRIGGER_START:
1634                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1635                             (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1636                                 continue;
1637
1638                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1639                         if (ret)
1640                                 return ret;
1641
1642                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1643                         break;
1644                 case SNDRV_PCM_TRIGGER_RESUME:
1645                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
1646                                 continue;
1647
1648                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1649                         if (ret)
1650                                 return ret;
1651
1652                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1653                         break;
1654                 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1655                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
1656                                 continue;
1657
1658                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1659                         if (ret)
1660                                 return ret;
1661
1662                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1663                         break;
1664                 case SNDRV_PCM_TRIGGER_STOP:
1665                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
1666                                 continue;
1667
1668                         if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1669                                 continue;
1670
1671                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1672                         if (ret)
1673                                 return ret;
1674
1675                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
1676                         break;
1677                 case SNDRV_PCM_TRIGGER_SUSPEND:
1678                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
1679                                 continue;
1680
1681                         if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1682                                 continue;
1683
1684                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1685                         if (ret)
1686                                 return ret;
1687
1688                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
1689                         break;
1690                 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1691                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
1692                                 continue;
1693
1694                         if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1695                                 continue;
1696
1697                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1698                         if (ret)
1699                                 return ret;
1700
1701                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
1702                         break;
1703                 }
1704         }
1705
1706         return ret;
1707 }
1708 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
1709
1710 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
1711 {
1712         struct snd_soc_pcm_runtime *fe = substream->private_data;
1713         int stream = substream->stream, ret;
1714         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
1715
1716         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1717
1718         switch (trigger) {
1719         case SND_SOC_DPCM_TRIGGER_PRE:
1720                 /* call trigger on the frontend before the backend. */
1721
1722                 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
1723                                 fe->dai_link->name, cmd);
1724
1725                 ret = soc_pcm_trigger(substream, cmd);
1726                 if (ret < 0) {
1727                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
1728                         goto out;
1729                 }
1730
1731                 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
1732                 break;
1733         case SND_SOC_DPCM_TRIGGER_POST:
1734                 /* call trigger on the frontend after the backend. */
1735
1736                 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
1737                 if (ret < 0) {
1738                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
1739                         goto out;
1740                 }
1741
1742                 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
1743                                 fe->dai_link->name, cmd);
1744
1745                 ret = soc_pcm_trigger(substream, cmd);
1746                 break;
1747         case SND_SOC_DPCM_TRIGGER_BESPOKE:
1748                 /* bespoke trigger() - handles both FE and BEs */
1749
1750                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
1751                                 fe->dai_link->name, cmd);
1752
1753                 ret = soc_pcm_bespoke_trigger(substream, cmd);
1754                 if (ret < 0) {
1755                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
1756                         goto out;
1757                 }
1758                 break;
1759         default:
1760                 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
1761                                 fe->dai_link->name);
1762                 ret = -EINVAL;
1763                 goto out;
1764         }
1765
1766         switch (cmd) {
1767         case SNDRV_PCM_TRIGGER_START:
1768         case SNDRV_PCM_TRIGGER_RESUME:
1769         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1770                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1771                 break;
1772         case SNDRV_PCM_TRIGGER_STOP:
1773         case SNDRV_PCM_TRIGGER_SUSPEND:
1774         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1775                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
1776                 break;
1777         }
1778
1779 out:
1780         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1781         return ret;
1782 }
1783
1784 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
1785 {
1786         struct snd_soc_dpcm *dpcm;
1787         int ret = 0;
1788
1789         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1790
1791                 struct snd_soc_pcm_runtime *be = dpcm->be;
1792                 struct snd_pcm_substream *be_substream =
1793                         snd_soc_dpcm_get_substream(be, stream);
1794
1795                 /* is this op for this BE ? */
1796                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1797                         continue;
1798
1799                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1800                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1801                         continue;
1802
1803                 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
1804                         dpcm->fe->dai_link->name);
1805
1806                 ret = soc_pcm_prepare(be_substream);
1807                 if (ret < 0) {
1808                         dev_err(be->dev, "ASoC: backend prepare failed %d\n",
1809                                 ret);
1810                         break;
1811                 }
1812
1813                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
1814         }
1815         return ret;
1816 }
1817
1818 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
1819 {
1820         struct snd_soc_pcm_runtime *fe = substream->private_data;
1821         int stream = substream->stream, ret = 0;
1822
1823         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1824
1825         dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
1826
1827         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1828
1829         /* there is no point preparing this FE if there are no BEs */
1830         if (list_empty(&fe->dpcm[stream].be_clients)) {
1831                 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
1832                                 fe->dai_link->name);
1833                 ret = -EINVAL;
1834                 goto out;
1835         }
1836
1837         ret = dpcm_be_dai_prepare(fe, substream->stream);
1838         if (ret < 0)
1839                 goto out;
1840
1841         /* call prepare on the frontend */
1842         ret = soc_pcm_prepare(substream);
1843         if (ret < 0) {
1844                 dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
1845                         fe->dai_link->name);
1846                 goto out;
1847         }
1848
1849         /* run the stream event for each BE */
1850         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
1851         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
1852
1853 out:
1854         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1855         mutex_unlock(&fe->card->mutex);
1856
1857         return ret;
1858 }
1859
1860 static int soc_pcm_ioctl(struct snd_pcm_substream *substream,
1861                      unsigned int cmd, void *arg)
1862 {
1863         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1864         struct snd_soc_platform *platform = rtd->platform;
1865
1866         if (platform->driver->ops && platform->driver->ops->ioctl)
1867                 return platform->driver->ops->ioctl(substream, cmd, arg);
1868         return snd_pcm_lib_ioctl(substream, cmd, arg);
1869 }
1870
1871 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1872 {
1873         struct snd_pcm_substream *substream =
1874                 snd_soc_dpcm_get_substream(fe, stream);
1875         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
1876         int err;
1877
1878         dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
1879                         stream ? "capture" : "playback", fe->dai_link->name);
1880
1881         if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
1882                 /* call bespoke trigger - FE takes care of all BE triggers */
1883                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
1884                                 fe->dai_link->name);
1885
1886                 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
1887                 if (err < 0)
1888                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
1889         } else {
1890                 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
1891                         fe->dai_link->name);
1892
1893                 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
1894                 if (err < 0)
1895                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
1896         }
1897
1898         err = dpcm_be_dai_hw_free(fe, stream);
1899         if (err < 0)
1900                 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
1901
1902         err = dpcm_be_dai_shutdown(fe, stream);
1903         if (err < 0)
1904                 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
1905
1906         /* run the stream event for each BE */
1907         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
1908
1909         return 0;
1910 }
1911
1912 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
1913 {
1914         struct snd_pcm_substream *substream =
1915                 snd_soc_dpcm_get_substream(fe, stream);
1916         struct snd_soc_dpcm *dpcm;
1917         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
1918         int ret;
1919
1920         dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
1921                         stream ? "capture" : "playback", fe->dai_link->name);
1922
1923         /* Only start the BE if the FE is ready */
1924         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
1925                 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
1926                 return -EINVAL;
1927
1928         /* startup must always be called for new BEs */
1929         ret = dpcm_be_dai_startup(fe, stream);
1930         if (ret < 0)
1931                 goto disconnect;
1932
1933         /* keep going if FE state is > open */
1934         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
1935                 return 0;
1936
1937         ret = dpcm_be_dai_hw_params(fe, stream);
1938         if (ret < 0)
1939                 goto close;
1940
1941         /* keep going if FE state is > hw_params */
1942         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
1943                 return 0;
1944
1945
1946         ret = dpcm_be_dai_prepare(fe, stream);
1947         if (ret < 0)
1948                 goto hw_free;
1949
1950         /* run the stream event for each BE */
1951         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
1952
1953         /* keep going if FE state is > prepare */
1954         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
1955                 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
1956                 return 0;
1957
1958         if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
1959                 /* call trigger on the frontend - FE takes care of all BE triggers */
1960                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
1961                                 fe->dai_link->name);
1962
1963                 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
1964                 if (ret < 0) {
1965                         dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
1966                         goto hw_free;
1967                 }
1968         } else {
1969                 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
1970                         fe->dai_link->name);
1971
1972                 ret = dpcm_be_dai_trigger(fe, stream,
1973                                         SNDRV_PCM_TRIGGER_START);
1974                 if (ret < 0) {
1975                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
1976                         goto hw_free;
1977                 }
1978         }
1979
1980         return 0;
1981
1982 hw_free:
1983         dpcm_be_dai_hw_free(fe, stream);
1984 close:
1985         dpcm_be_dai_shutdown(fe, stream);
1986 disconnect:
1987         /* disconnect any non started BEs */
1988         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1989                 struct snd_soc_pcm_runtime *be = dpcm->be;
1990                 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
1991                                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1992         }
1993
1994         return ret;
1995 }
1996
1997 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
1998 {
1999         int ret;
2000
2001         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
2002         ret = dpcm_run_update_startup(fe, stream);
2003         if (ret < 0)
2004                 dev_err(fe->dev, "ASoC: failed to startup some BEs\n");
2005         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2006
2007         return ret;
2008 }
2009
2010 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
2011 {
2012         int ret;
2013
2014         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
2015         ret = dpcm_run_update_shutdown(fe, stream);
2016         if (ret < 0)
2017                 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
2018         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2019
2020         return ret;
2021 }
2022
2023 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2024  * any DAI links.
2025  */
2026 int soc_dpcm_runtime_update(struct snd_soc_card *card)
2027 {
2028         int i, old, new, paths;
2029
2030         mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2031         for (i = 0; i < card->num_rtd; i++) {
2032                 struct snd_soc_dapm_widget_list *list;
2033                 struct snd_soc_pcm_runtime *fe = &card->rtd[i];
2034
2035                 /* make sure link is FE */
2036                 if (!fe->dai_link->dynamic)
2037                         continue;
2038
2039                 /* only check active links */
2040                 if (!fe->cpu_dai->active)
2041                         continue;
2042
2043                 /* DAPM sync will call this to update DSP paths */
2044                 dev_dbg(fe->dev, "ASoC: DPCM runtime update for FE %s\n",
2045                         fe->dai_link->name);
2046
2047                 /* skip if FE doesn't have playback capability */
2048                 if (!fe->cpu_dai->driver->playback.channels_min)
2049                         goto capture;
2050
2051                 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
2052                 if (paths < 0) {
2053                         dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2054                                         fe->dai_link->name,  "playback");
2055                         mutex_unlock(&card->mutex);
2056                         return paths;
2057                 }
2058
2059                 /* update any new playback paths */
2060                 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 1);
2061                 if (new) {
2062                         dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2063                         dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2064                         dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2065                 }
2066
2067                 /* update any old playback paths */
2068                 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 0);
2069                 if (old) {
2070                         dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2071                         dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2072                         dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2073                 }
2074
2075 capture:
2076                 /* skip if FE doesn't have capture capability */
2077                 if (!fe->cpu_dai->driver->capture.channels_min)
2078                         continue;
2079
2080                 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
2081                 if (paths < 0) {
2082                         dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2083                                         fe->dai_link->name,  "capture");
2084                         mutex_unlock(&card->mutex);
2085                         return paths;
2086                 }
2087
2088                 /* update any new capture paths */
2089                 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 1);
2090                 if (new) {
2091                         dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2092                         dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2093                         dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2094                 }
2095
2096                 /* update any old capture paths */
2097                 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 0);
2098                 if (old) {
2099                         dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2100                         dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2101                         dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2102                 }
2103
2104                 dpcm_path_put(&list);
2105         }
2106
2107         mutex_unlock(&card->mutex);
2108         return 0;
2109 }
2110 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
2111 {
2112         struct snd_soc_dpcm *dpcm;
2113         struct list_head *clients =
2114                 &fe->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients;
2115
2116         list_for_each_entry(dpcm, clients, list_be) {
2117
2118                 struct snd_soc_pcm_runtime *be = dpcm->be;
2119                 struct snd_soc_dai *dai = be->codec_dai;
2120                 struct snd_soc_dai_driver *drv = dai->driver;
2121
2122                 if (be->dai_link->ignore_suspend)
2123                         continue;
2124
2125                 dev_dbg(be->dev, "ASoC: BE digital mute %s\n", be->dai_link->name);
2126
2127                 if (drv->ops && drv->ops->digital_mute && dai->playback_active)
2128                         drv->ops->digital_mute(dai, mute);
2129         }
2130
2131         return 0;
2132 }
2133
2134 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2135 {
2136         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2137         struct snd_soc_dpcm *dpcm;
2138         struct snd_soc_dapm_widget_list *list;
2139         int ret;
2140         int stream = fe_substream->stream;
2141
2142         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2143         fe->dpcm[stream].runtime = fe_substream->runtime;
2144
2145         if (dpcm_path_get(fe, stream, &list) <= 0) {
2146                 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
2147                         fe->dai_link->name, stream ? "capture" : "playback");
2148         }
2149
2150         /* calculate valid and active FE <-> BE dpcms */
2151         dpcm_process_paths(fe, stream, &list, 1);
2152
2153         ret = dpcm_fe_dai_startup(fe_substream);
2154         if (ret < 0) {
2155                 /* clean up all links */
2156                 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
2157                         dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2158
2159                 dpcm_be_disconnect(fe, stream);
2160                 fe->dpcm[stream].runtime = NULL;
2161         }
2162
2163         dpcm_clear_pending_state(fe, stream);
2164         dpcm_path_put(&list);
2165         mutex_unlock(&fe->card->mutex);
2166         return ret;
2167 }
2168
2169 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2170 {
2171         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2172         struct snd_soc_dpcm *dpcm;
2173         int stream = fe_substream->stream, ret;
2174
2175         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2176         ret = dpcm_fe_dai_shutdown(fe_substream);
2177
2178         /* mark FE's links ready to prune */
2179         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
2180                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2181
2182         dpcm_be_disconnect(fe, stream);
2183
2184         fe->dpcm[stream].runtime = NULL;
2185         mutex_unlock(&fe->card->mutex);
2186         return ret;
2187 }
2188
2189 /* create a new pcm */
2190 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2191 {
2192         struct snd_soc_platform *platform = rtd->platform;
2193         struct snd_soc_dai *codec_dai = rtd->codec_dai;
2194         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2195         struct snd_pcm *pcm;
2196         char new_name[64];
2197         int ret = 0, playback = 0, capture = 0;
2198
2199         if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
2200                 playback = rtd->dai_link->dpcm_playback;
2201                 capture = rtd->dai_link->dpcm_capture;
2202         } else {
2203                 if (codec_dai->driver->playback.channels_min &&
2204                     cpu_dai->driver->playback.channels_min)
2205                         playback = 1;
2206                 if (codec_dai->driver->capture.channels_min &&
2207                     cpu_dai->driver->capture.channels_min)
2208                         capture = 1;
2209         }
2210
2211         if (rtd->dai_link->playback_only) {
2212                 playback = 1;
2213                 capture = 0;
2214         }
2215
2216         if (rtd->dai_link->capture_only) {
2217                 playback = 0;
2218                 capture = 1;
2219         }
2220
2221         /* create the PCM */
2222         if (rtd->dai_link->no_pcm) {
2223                 snprintf(new_name, sizeof(new_name), "(%s)",
2224                         rtd->dai_link->stream_name);
2225
2226                 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2227                                 playback, capture, &pcm);
2228         } else {
2229                 if (rtd->dai_link->dynamic)
2230                         snprintf(new_name, sizeof(new_name), "%s (*)",
2231                                 rtd->dai_link->stream_name);
2232                 else
2233                         snprintf(new_name, sizeof(new_name), "%s %s-%d",
2234                                 rtd->dai_link->stream_name, codec_dai->name, num);
2235
2236                 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2237                         capture, &pcm);
2238         }
2239         if (ret < 0) {
2240                 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
2241                         rtd->dai_link->name);
2242                 return ret;
2243         }
2244         dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
2245
2246         /* DAPM dai link stream work */
2247         INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
2248
2249         rtd->pcm = pcm;
2250         pcm->private_data = rtd;
2251
2252         if (rtd->dai_link->no_pcm) {
2253                 if (playback)
2254                         pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2255                 if (capture)
2256                         pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2257                 goto out;
2258         }
2259
2260         /* ASoC PCM operations */
2261         if (rtd->dai_link->dynamic) {
2262                 rtd->ops.open           = dpcm_fe_dai_open;
2263                 rtd->ops.hw_params      = dpcm_fe_dai_hw_params;
2264                 rtd->ops.prepare        = dpcm_fe_dai_prepare;
2265                 rtd->ops.trigger        = dpcm_fe_dai_trigger;
2266                 rtd->ops.hw_free        = dpcm_fe_dai_hw_free;
2267                 rtd->ops.close          = dpcm_fe_dai_close;
2268                 rtd->ops.pointer        = soc_pcm_pointer;
2269                 rtd->ops.ioctl          = soc_pcm_ioctl;
2270         } else {
2271                 rtd->ops.open           = soc_pcm_open;
2272                 rtd->ops.hw_params      = soc_pcm_hw_params;
2273                 rtd->ops.prepare        = soc_pcm_prepare;
2274                 rtd->ops.trigger        = soc_pcm_trigger;
2275                 rtd->ops.hw_free        = soc_pcm_hw_free;
2276                 rtd->ops.close          = soc_pcm_close;
2277                 rtd->ops.pointer        = soc_pcm_pointer;
2278                 rtd->ops.ioctl          = soc_pcm_ioctl;
2279         }
2280
2281         if (platform->driver->ops) {
2282                 rtd->ops.ack            = platform->driver->ops->ack;
2283                 rtd->ops.copy           = platform->driver->ops->copy;
2284                 rtd->ops.silence        = platform->driver->ops->silence;
2285                 rtd->ops.page           = platform->driver->ops->page;
2286                 rtd->ops.mmap           = platform->driver->ops->mmap;
2287         }
2288
2289         if (playback)
2290                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
2291
2292         if (capture)
2293                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
2294
2295         if (platform->driver->pcm_new) {
2296                 ret = platform->driver->pcm_new(rtd);
2297                 if (ret < 0) {
2298                         dev_err(platform->dev,
2299                                 "ASoC: pcm constructor failed: %d\n",
2300                                 ret);
2301                         return ret;
2302                 }
2303         }
2304
2305         pcm->private_free = platform->driver->pcm_free;
2306 out:
2307         dev_info(rtd->card->dev, "%s <-> %s mapping ok\n", codec_dai->name,
2308                 cpu_dai->name);
2309         return ret;
2310 }
2311
2312 /* is the current PCM operation for this FE ? */
2313 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
2314 {
2315         if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
2316                 return 1;
2317         return 0;
2318 }
2319 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
2320
2321 /* is the current PCM operation for this BE ? */
2322 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
2323                 struct snd_soc_pcm_runtime *be, int stream)
2324 {
2325         if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
2326            ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
2327                   be->dpcm[stream].runtime_update))
2328                 return 1;
2329         return 0;
2330 }
2331 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
2332
2333 /* get the substream for this BE */
2334 struct snd_pcm_substream *
2335         snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
2336 {
2337         return be->pcm->streams[stream].substream;
2338 }
2339 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
2340
2341 /* get the BE runtime state */
2342 enum snd_soc_dpcm_state
2343         snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream)
2344 {
2345         return be->dpcm[stream].state;
2346 }
2347 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state);
2348
2349 /* set the BE runtime state */
2350 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be,
2351                 int stream, enum snd_soc_dpcm_state state)
2352 {
2353         be->dpcm[stream].state = state;
2354 }
2355 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state);
2356
2357 /*
2358  * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
2359  * are not running, paused or suspended for the specified stream direction.
2360  */
2361 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
2362                 struct snd_soc_pcm_runtime *be, int stream)
2363 {
2364         struct snd_soc_dpcm *dpcm;
2365         int state;
2366
2367         list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
2368
2369                 if (dpcm->fe == fe)
2370                         continue;
2371
2372                 state = dpcm->fe->dpcm[stream].state;
2373                 if (state == SND_SOC_DPCM_STATE_START ||
2374                         state == SND_SOC_DPCM_STATE_PAUSED ||
2375                         state == SND_SOC_DPCM_STATE_SUSPEND)
2376                         return 0;
2377         }
2378
2379         /* it's safe to free/stop this BE DAI */
2380         return 1;
2381 }
2382 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
2383
2384 /*
2385  * We can only change hw params a BE DAI if any of it's FE are not prepared,
2386  * running, paused or suspended for the specified stream direction.
2387  */
2388 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
2389                 struct snd_soc_pcm_runtime *be, int stream)
2390 {
2391         struct snd_soc_dpcm *dpcm;
2392         int state;
2393
2394         list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
2395
2396                 if (dpcm->fe == fe)
2397                         continue;
2398
2399                 state = dpcm->fe->dpcm[stream].state;
2400                 if (state == SND_SOC_DPCM_STATE_START ||
2401                         state == SND_SOC_DPCM_STATE_PAUSED ||
2402                         state == SND_SOC_DPCM_STATE_SUSPEND ||
2403                         state == SND_SOC_DPCM_STATE_PREPARE)
2404                         return 0;
2405         }
2406
2407         /* it's safe to change hw_params */
2408         return 1;
2409 }
2410 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
2411
2412 int snd_soc_platform_trigger(struct snd_pcm_substream *substream,
2413                 int cmd, struct snd_soc_platform *platform)
2414 {
2415         if (platform->driver->ops && platform->driver->ops->trigger)
2416                 return platform->driver->ops->trigger(substream, cmd);
2417         return 0;
2418 }
2419 EXPORT_SYMBOL_GPL(snd_soc_platform_trigger);
2420
2421 #ifdef CONFIG_DEBUG_FS
2422 static char *dpcm_state_string(enum snd_soc_dpcm_state state)
2423 {
2424         switch (state) {
2425         case SND_SOC_DPCM_STATE_NEW:
2426                 return "new";
2427         case SND_SOC_DPCM_STATE_OPEN:
2428                 return "open";
2429         case SND_SOC_DPCM_STATE_HW_PARAMS:
2430                 return "hw_params";
2431         case SND_SOC_DPCM_STATE_PREPARE:
2432                 return "prepare";
2433         case SND_SOC_DPCM_STATE_START:
2434                 return "start";
2435         case SND_SOC_DPCM_STATE_STOP:
2436                 return "stop";
2437         case SND_SOC_DPCM_STATE_SUSPEND:
2438                 return "suspend";
2439         case SND_SOC_DPCM_STATE_PAUSED:
2440                 return "paused";
2441         case SND_SOC_DPCM_STATE_HW_FREE:
2442                 return "hw_free";
2443         case SND_SOC_DPCM_STATE_CLOSE:
2444                 return "close";
2445         }
2446
2447         return "unknown";
2448 }
2449
2450 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
2451                                 int stream, char *buf, size_t size)
2452 {
2453         struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
2454         struct snd_soc_dpcm *dpcm;
2455         ssize_t offset = 0;
2456
2457         /* FE state */
2458         offset += snprintf(buf + offset, size - offset,
2459                         "[%s - %s]\n", fe->dai_link->name,
2460                         stream ? "Capture" : "Playback");
2461
2462         offset += snprintf(buf + offset, size - offset, "State: %s\n",
2463                         dpcm_state_string(fe->dpcm[stream].state));
2464
2465         if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
2466             (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
2467                 offset += snprintf(buf + offset, size - offset,
2468                                 "Hardware Params: "
2469                                 "Format = %s, Channels = %d, Rate = %d\n",
2470                                 snd_pcm_format_name(params_format(params)),
2471                                 params_channels(params),
2472                                 params_rate(params));
2473
2474         /* BEs state */
2475         offset += snprintf(buf + offset, size - offset, "Backends:\n");
2476
2477         if (list_empty(&fe->dpcm[stream].be_clients)) {
2478                 offset += snprintf(buf + offset, size - offset,
2479                                 " No active DSP links\n");
2480                 goto out;
2481         }
2482
2483         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2484                 struct snd_soc_pcm_runtime *be = dpcm->be;
2485                 params = &dpcm->hw_params;
2486
2487                 offset += snprintf(buf + offset, size - offset,
2488                                 "- %s\n", be->dai_link->name);
2489
2490                 offset += snprintf(buf + offset, size - offset,
2491                                 "   State: %s\n",
2492                                 dpcm_state_string(be->dpcm[stream].state));
2493
2494                 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
2495                     (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
2496                         offset += snprintf(buf + offset, size - offset,
2497                                 "   Hardware Params: "
2498                                 "Format = %s, Channels = %d, Rate = %d\n",
2499                                 snd_pcm_format_name(params_format(params)),
2500                                 params_channels(params),
2501                                 params_rate(params));
2502         }
2503
2504 out:
2505         return offset;
2506 }
2507
2508 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
2509                                 size_t count, loff_t *ppos)
2510 {
2511         struct snd_soc_pcm_runtime *fe = file->private_data;
2512         ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
2513         char *buf;
2514
2515         buf = kmalloc(out_count, GFP_KERNEL);
2516         if (!buf)
2517                 return -ENOMEM;
2518
2519         if (fe->cpu_dai->driver->playback.channels_min)
2520                 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
2521                                         buf + offset, out_count - offset);
2522
2523         if (fe->cpu_dai->driver->capture.channels_min)
2524                 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE,
2525                                         buf + offset, out_count - offset);
2526
2527         ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
2528
2529         kfree(buf);
2530         return ret;
2531 }
2532
2533 static const struct file_operations dpcm_state_fops = {
2534         .open = simple_open,
2535         .read = dpcm_state_read_file,
2536         .llseek = default_llseek,
2537 };
2538
2539 int soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
2540 {
2541         if (!rtd->dai_link)
2542                 return 0;
2543
2544         rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
2545                         rtd->card->debugfs_card_root);
2546         if (!rtd->debugfs_dpcm_root) {
2547                 dev_dbg(rtd->dev,
2548                          "ASoC: Failed to create dpcm debugfs directory %s\n",
2549                          rtd->dai_link->name);
2550                 return -EINVAL;
2551         }
2552
2553         rtd->debugfs_dpcm_state = debugfs_create_file("state", 0444,
2554                                                 rtd->debugfs_dpcm_root,
2555                                                 rtd, &dpcm_state_fops);
2556
2557         return 0;
2558 }
2559 #endif