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_dai_stream_valid() - check if a DAI supports the given stream
  39  *
  40  * Returns true if the DAI supports the indicated stream type.
  41  */
  42 static bool snd_soc_dai_stream_valid(struct snd_soc_dai *dai, int stream)
  43 {
  44         struct snd_soc_pcm_stream *codec_stream;
  45
  46         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
  47                 codec_stream = &dai->driver->playback;
  48         else
  49                 codec_stream = &dai->driver->capture;
  50
  51         /* If the codec specifies any rate at all, it supports the stream. */
  52         return codec_stream->rates;
  53 }
  54
  55 /**
  56  * snd_soc_runtime_activate() - Increment active count for PCM runtime components
  57  * @rtd: ASoC PCM runtime that is activated
  58  * @stream: Direction of the PCM stream
  59  *
  60  * Increments the active count for all the DAIs and components attached to a PCM
  61  * runtime. Should typically be called when a stream is opened.
  62  *
  63  * Must be called with the rtd->pcm_mutex being held
  64  */
  65 void snd_soc_runtime_activate(struct snd_soc_pcm_runtime *rtd, int stream)
  66 {
  67         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  68         int i;
  69
  70         lockdep_assert_held(&rtd->pcm_mutex);
  71
  72         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
  73                 cpu_dai->playback_active++;
  74                 for (i = 0; i < rtd->num_codecs; i++)
  75                         rtd->codec_dais[i]->playback_active++;
  76         } else {
  77                 cpu_dai->capture_active++;
  78                 for (i = 0; i < rtd->num_codecs; i++)
  79                         rtd->codec_dais[i]->capture_active++;
  80         }
  81
  82         cpu_dai->active++;
  83         cpu_dai->component->active++;
  84         for (i = 0; i < rtd->num_codecs; i++) {
  85                 rtd->codec_dais[i]->active++;
  86                 rtd->codec_dais[i]->component->active++;
  87         }
  88 }
  89
  90 /**
  91  * snd_soc_runtime_deactivate() - Decrement active count for PCM runtime components
  92  * @rtd: ASoC PCM runtime that is deactivated
  93  * @stream: Direction of the PCM stream
  94  *
  95  * Decrements the active count for all the DAIs and components attached to a PCM
  96  * runtime. Should typically be called when a stream is closed.
  97  *
  98  * Must be called with the rtd->pcm_mutex being held
  99  */
 100 void snd_soc_runtime_deactivate(struct snd_soc_pcm_runtime *rtd, int stream)
 101 {
 102         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 103         int i;
 104
 105         lockdep_assert_held(&rtd->pcm_mutex);
 106
 107         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
 108                 cpu_dai->playback_active--;
 109                 for (i = 0; i < rtd->num_codecs; i++)
 110                         rtd->codec_dais[i]->playback_active--;
 111         } else {
 112                 cpu_dai->capture_active--;
 113                 for (i = 0; i < rtd->num_codecs; i++)
 114                         rtd->codec_dais[i]->capture_active--;
 115         }
 116
 117         cpu_dai->active--;
 118         cpu_dai->component->active--;
 119         for (i = 0; i < rtd->num_codecs; i++) {
 120                 rtd->codec_dais[i]->component->active--;
 121                 rtd->codec_dais[i]->active--;
 122         }
 123 }
 124
 125 /**
 126  * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay
 127  * @rtd: The ASoC PCM runtime that should be checked.
 128  *
 129  * This function checks whether the power down delay should be ignored for a
 130  * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has
 131  * been configured to ignore the delay, or if none of the components benefits
 132  * from having the delay.
 133  */
 134 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd)
 135 {
 136         struct snd_soc_rtdcom_list *rtdcom;
 137         struct snd_soc_component *component;
 138         int i;
 139         bool ignore = true;
 140
 141         if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time)
 142                 return true;
 143
 144         for_each_rtdcom(rtd, rtdcom) {
 145                 component = rtdcom->component;
 146
 147                 ignore &= !component->driver->pmdown_time;
 148         }
 149
 150         /* this will be removed */
 151         for (i = 0; i < rtd->num_codecs; i++)
 152                 ignore &= rtd->codec_dais[i]->component->ignore_pmdown_time;
 153
 154         return ignore;
 155 }
 156
 157 /**
 158  * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
 159  * @substream: the pcm substream
 160  * @hw: the hardware parameters
 161  *
 162  * Sets the substream runtime hardware parameters.
 163  */
 164 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
 165         const struct snd_pcm_hardware *hw)
 166 {
 167         struct snd_pcm_runtime *runtime = substream->runtime;
 168         runtime->hw.info = hw->info;
 169         runtime->hw.formats = hw->formats;
 170         runtime->hw.period_bytes_min = hw->period_bytes_min;
 171         runtime->hw.period_bytes_max = hw->period_bytes_max;
 172         runtime->hw.periods_min = hw->periods_min;
 173         runtime->hw.periods_max = hw->periods_max;
 174         runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
 175         runtime->hw.fifo_size = hw->fifo_size;
 176         return 0;
 177 }
 178 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
 179
 180 /* DPCM stream event, send event to FE and all active BEs. */
 181 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
 182         int event)
 183 {
 184         struct snd_soc_dpcm *dpcm;
 185
 186         list_for_each_entry(dpcm, &fe->dpcm[dir].be_clients, list_be) {
 187
 188                 struct snd_soc_pcm_runtime *be = dpcm->be;
 189
 190                 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n",
 191                                 be->dai_link->name, event, dir);
 192
 193                 if ((event == SND_SOC_DAPM_STREAM_STOP) &&
 194                     (be->dpcm[dir].users >= 1))
 195                         continue;
 196
 197                 snd_soc_dapm_stream_event(be, dir, event);
 198         }
 199
 200         snd_soc_dapm_stream_event(fe, dir, event);
 201
 202         return 0;
 203 }
 204
 205 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
 206                                         struct snd_soc_dai *soc_dai)
 207 {
 208         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 209         int ret;
 210
 211         if (soc_dai->rate && (soc_dai->driver->symmetric_rates ||
 212                                 rtd->dai_link->symmetric_rates)) {
 213                 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %dHz rate\n",
 214                                 soc_dai->rate);
 215
 216                 ret = snd_pcm_hw_constraint_single(substream->runtime,
 217                                                 SNDRV_PCM_HW_PARAM_RATE,
 218                                                 soc_dai->rate);
 219                 if (ret < 0) {
 220                         dev_err(soc_dai->dev,
 221                                 "ASoC: Unable to apply rate constraint: %d\n",
 222                                 ret);
 223                         return ret;
 224                 }
 225         }
 226
 227         if (soc_dai->channels && (soc_dai->driver->symmetric_channels ||
 228                                 rtd->dai_link->symmetric_channels)) {
 229                 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d channel(s)\n",
 230                                 soc_dai->channels);
 231
 232                 ret = snd_pcm_hw_constraint_single(substream->runtime,
 233                                                 SNDRV_PCM_HW_PARAM_CHANNELS,
 234                                                 soc_dai->channels);
 235                 if (ret < 0) {
 236                         dev_err(soc_dai->dev,
 237                                 "ASoC: Unable to apply channel symmetry constraint: %d\n",
 238                                 ret);
 239                         return ret;
 240                 }
 241         }
 242
 243         if (soc_dai->sample_bits && (soc_dai->driver->symmetric_samplebits ||
 244                                 rtd->dai_link->symmetric_samplebits)) {
 245                 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d sample bits\n",
 246                                 soc_dai->sample_bits);
 247
 248                 ret = snd_pcm_hw_constraint_single(substream->runtime,
 249                                                 SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
 250                                                 soc_dai->sample_bits);
 251                 if (ret < 0) {
 252                         dev_err(soc_dai->dev,
 253                                 "ASoC: Unable to apply sample bits symmetry constraint: %d\n",
 254                                 ret);
 255                         return ret;
 256                 }
 257         }
 258
 259         return 0;
 260 }
 261
 262 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream,
 263                                 struct snd_pcm_hw_params *params)
 264 {
 265         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 266         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 267         unsigned int rate, channels, sample_bits, symmetry, i;
 268
 269         rate = params_rate(params);
 270         channels = params_channels(params);
 271         sample_bits = snd_pcm_format_physical_width(params_format(params));
 272
 273         /* reject unmatched parameters when applying symmetry */
 274         symmetry = cpu_dai->driver->symmetric_rates ||
 275                 rtd->dai_link->symmetric_rates;
 276
 277         for (i = 0; i < rtd->num_codecs; i++)
 278                 symmetry |= rtd->codec_dais[i]->driver->symmetric_rates;
 279
 280         if (symmetry && cpu_dai->rate && cpu_dai->rate != rate) {
 281                 dev_err(rtd->dev, "ASoC: unmatched rate symmetry: %d - %d\n",
 282                                 cpu_dai->rate, rate);
 283                 return -EINVAL;
 284         }
 285
 286         symmetry = cpu_dai->driver->symmetric_channels ||
 287                 rtd->dai_link->symmetric_channels;
 288
 289         for (i = 0; i < rtd->num_codecs; i++)
 290                 symmetry |= rtd->codec_dais[i]->driver->symmetric_channels;
 291
 292         if (symmetry && cpu_dai->channels && cpu_dai->channels != channels) {
 293                 dev_err(rtd->dev, "ASoC: unmatched channel symmetry: %d - %d\n",
 294                                 cpu_dai->channels, channels);
 295                 return -EINVAL;
 296         }
 297
 298         symmetry = cpu_dai->driver->symmetric_samplebits ||
 299                 rtd->dai_link->symmetric_samplebits;
 300
 301         for (i = 0; i < rtd->num_codecs; i++)
 302                 symmetry |= rtd->codec_dais[i]->driver->symmetric_samplebits;
 303
 304         if (symmetry && cpu_dai->sample_bits && cpu_dai->sample_bits != sample_bits) {
 305                 dev_err(rtd->dev, "ASoC: unmatched sample bits symmetry: %d - %d\n",
 306                                 cpu_dai->sample_bits, sample_bits);
 307                 return -EINVAL;
 308         }
 309
 310         return 0;
 311 }
 312
 313 static bool soc_pcm_has_symmetry(struct snd_pcm_substream *substream)
 314 {
 315         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 316         struct snd_soc_dai_driver *cpu_driver = rtd->cpu_dai->driver;
 317         struct snd_soc_dai_link *link = rtd->dai_link;
 318         unsigned int symmetry, i;
 319
 320         symmetry = cpu_driver->symmetric_rates || link->symmetric_rates ||
 321                 cpu_driver->symmetric_channels || link->symmetric_channels ||
 322                 cpu_driver->symmetric_samplebits || link->symmetric_samplebits;
 323
 324         for (i = 0; i < rtd->num_codecs; i++)
 325                 symmetry = symmetry ||
 326                         rtd->codec_dais[i]->driver->symmetric_rates ||
 327                         rtd->codec_dais[i]->driver->symmetric_channels ||
 328                         rtd->codec_dais[i]->driver->symmetric_samplebits;
 329
 330         return symmetry;
 331 }
 332
 333 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits)
 334 {
 335         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 336         int ret;
 337
 338         if (!bits)
 339                 return;
 340
 341         ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits);
 342         if (ret != 0)
 343                 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n",
 344                                  bits, ret);
 345 }
 346
 347 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream)
 348 {
 349         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 350         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 351         struct snd_soc_dai *codec_dai;
 352         int i;
 353         unsigned int bits = 0, cpu_bits;
 354
 355         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 356                 for (i = 0; i < rtd->num_codecs; i++) {
 357                         codec_dai = rtd->codec_dais[i];
 358                         if (codec_dai->driver->playback.sig_bits == 0) {
 359                                 bits = 0;
 360                                 break;
 361                         }
 362                         bits = max(codec_dai->driver->playback.sig_bits, bits);
 363                 }
 364                 cpu_bits = cpu_dai->driver->playback.sig_bits;
 365         } else {
 366                 for (i = 0; i < rtd->num_codecs; i++) {
 367                         codec_dai = rtd->codec_dais[i];
 368                         if (codec_dai->driver->capture.sig_bits == 0) {
 369                                 bits = 0;
 370                                 break;
 371                         }
 372                         bits = max(codec_dai->driver->capture.sig_bits, bits);
 373                 }
 374                 cpu_bits = cpu_dai->driver->capture.sig_bits;
 375         }
 376
 377         soc_pcm_set_msb(substream, bits);
 378         soc_pcm_set_msb(substream, cpu_bits);
 379 }
 380
 381 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream)
 382 {
 383         struct snd_pcm_runtime *runtime = substream->runtime;
 384         struct snd_pcm_hardware *hw = &runtime->hw;
 385         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 386         struct snd_soc_dai_driver *cpu_dai_drv = rtd->cpu_dai->driver;
 387         struct snd_soc_dai_driver *codec_dai_drv;
 388         struct snd_soc_pcm_stream *codec_stream;
 389         struct snd_soc_pcm_stream *cpu_stream;
 390         unsigned int chan_min = 0, chan_max = UINT_MAX;
 391         unsigned int rate_min = 0, rate_max = UINT_MAX;
 392         unsigned int rates = UINT_MAX;
 393         u64 formats = ULLONG_MAX;
 394         int i;
 395
 396         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 397                 cpu_stream = &cpu_dai_drv->playback;
 398         else
 399                 cpu_stream = &cpu_dai_drv->capture;
 400
 401         /* first calculate min/max only for CODECs in the DAI link */
 402         for (i = 0; i < rtd->num_codecs; i++) {
 403
 404                 /*
 405                  * Skip CODECs which don't support the current stream type.
 406                  * Otherwise, since the rate, channel, and format values will
 407                  * zero in that case, we would have no usable settings left,
 408                  * causing the resulting setup to fail.
 409                  * At least one CODEC should match, otherwise we should have
 410                  * bailed out on a higher level, since there would be no
 411                  * CODEC to support the transfer direction in that case.
 412                  */
 413                 if (!snd_soc_dai_stream_valid(rtd->codec_dais[i],
 414                                               substream->stream))
 415                         continue;
 416
 417                 codec_dai_drv = rtd->codec_dais[i]->driver;
 418                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 419                         codec_stream = &codec_dai_drv->playback;
 420                 else
 421                         codec_stream = &codec_dai_drv->capture;
 422                 chan_min = max(chan_min, codec_stream->channels_min);
 423                 chan_max = min(chan_max, codec_stream->channels_max);
 424                 rate_min = max(rate_min, codec_stream->rate_min);
 425                 rate_max = min_not_zero(rate_max, codec_stream->rate_max);
 426                 formats &= codec_stream->formats;
 427                 rates = snd_pcm_rate_mask_intersect(codec_stream->rates, rates);
 428         }
 429
 430         /*
 431          * chan min/max cannot be enforced if there are multiple CODEC DAIs
 432          * connected to a single CPU DAI, use CPU DAI's directly and let
 433          * channel allocation be fixed up later
 434          */
 435         if (rtd->num_codecs > 1) {
 436                 chan_min = cpu_stream->channels_min;
 437                 chan_max = cpu_stream->channels_max;
 438         }
 439
 440         hw->channels_min = max(chan_min, cpu_stream->channels_min);
 441         hw->channels_max = min(chan_max, cpu_stream->channels_max);
 442         if (hw->formats)
 443                 hw->formats &= formats & cpu_stream->formats;
 444         else
 445                 hw->formats = formats & cpu_stream->formats;
 446         hw->rates = snd_pcm_rate_mask_intersect(rates, cpu_stream->rates);
 447
 448         snd_pcm_limit_hw_rates(runtime);
 449
 450         hw->rate_min = max(hw->rate_min, cpu_stream->rate_min);
 451         hw->rate_min = max(hw->rate_min, rate_min);
 452         hw->rate_max = min_not_zero(hw->rate_max, cpu_stream->rate_max);
 453         hw->rate_max = min_not_zero(hw->rate_max, rate_max);
 454 }
 455
 456 /*
 457  * Called by ALSA when a PCM substream is opened, the runtime->hw record is
 458  * then initialized and any private data can be allocated. This also calls
 459  * startup for the cpu DAI, platform, machine and codec DAI.
 460  */
 461 static int soc_pcm_open(struct snd_pcm_substream *substream)
 462 {
 463         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 464         struct snd_pcm_runtime *runtime = substream->runtime;
 465         struct snd_soc_platform *platform = rtd->platform;
 466         struct snd_soc_component *component;
 467         struct snd_soc_rtdcom_list *rtdcom;
 468         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 469         struct snd_soc_dai *codec_dai;
 470         const char *codec_dai_name = "multicodec";
 471         int i, ret = 0, __ret;
 472
 473         pinctrl_pm_select_default_state(cpu_dai->dev);
 474         for (i = 0; i < rtd->num_codecs; i++)
 475                 pinctrl_pm_select_default_state(rtd->codec_dais[i]->dev);
 476
 477         for_each_rtdcom(rtd, rtdcom) {
 478                 component = rtdcom->component;
 479
 480                 pm_runtime_get_sync(component->dev);
 481         }
 482
 483         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 484
 485         /* startup the audio subsystem */
 486         if (cpu_dai->driver->ops->startup) {
 487                 ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
 488                 if (ret < 0) {
 489                         dev_err(cpu_dai->dev, "ASoC: can't open interface"
 490                                 " %s: %d\n", cpu_dai->name, ret);
 491                         goto out;
 492                 }
 493         }
 494
 495         if (platform && platform->driver->ops && platform->driver->ops->open) {
 496                 ret = platform->driver->ops->open(substream);
 497                 if (ret < 0) {
 498                         dev_err(platform->dev, "ASoC: can't open platform"
 499                                 " %s: %d\n", platform->component.name, ret);
 500                         goto platform_err;
 501                 }
 502         }
 503
 504         ret = 0;
 505         for_each_rtdcom(rtd, rtdcom) {
 506                 component = rtdcom->component;
 507
 508                 /* ignore duplication for now */
 509                 if (platform && (component == &platform->component))
 510                         continue;
 511
 512                 if (!component->driver->ops ||
 513                     !component->driver->ops->open)
 514                         continue;
 515
 516                 __ret = component->driver->ops->open(substream);
 517                 if (__ret < 0) {
 518                         dev_err(component->dev,
 519                                 "ASoC: can't open component %s: %d\n",
 520                                 component->name, ret);
 521                         ret = __ret;
 522                 }
 523         }
 524         if (ret < 0)
 525                 goto component_err;
 526
 527         for (i = 0; i < rtd->num_codecs; i++) {
 528                 codec_dai = rtd->codec_dais[i];
 529                 if (codec_dai->driver->ops->startup) {
 530                         ret = codec_dai->driver->ops->startup(substream,
 531                                                               codec_dai);
 532                         if (ret < 0) {
 533                                 dev_err(codec_dai->dev,
 534                                         "ASoC: can't open codec %s: %d\n",
 535                                         codec_dai->name, ret);
 536                                 goto codec_dai_err;
 537                         }
 538                 }
 539
 540                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 541                         codec_dai->tx_mask = 0;
 542                 else
 543                         codec_dai->rx_mask = 0;
 544         }
 545
 546         if (rtd->dai_link->ops->startup) {
 547                 ret = rtd->dai_link->ops->startup(substream);
 548                 if (ret < 0) {
 549                         pr_err("ASoC: %s startup failed: %d\n",
 550                                rtd->dai_link->name, ret);
 551                         goto machine_err;
 552                 }
 553         }
 554
 555         /* Dynamic PCM DAI links compat checks use dynamic capabilities */
 556         if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
 557                 goto dynamic;
 558
 559         /* Check that the codec and cpu DAIs are compatible */
 560         soc_pcm_init_runtime_hw(substream);
 561
 562         if (rtd->num_codecs == 1)
 563                 codec_dai_name = rtd->codec_dai->name;
 564
 565         if (soc_pcm_has_symmetry(substream))
 566                 runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
 567
 568         ret = -EINVAL;
 569         if (!runtime->hw.rates) {
 570                 printk(KERN_ERR "ASoC: %s <-> %s No matching rates\n",
 571                         codec_dai_name, cpu_dai->name);
 572                 goto config_err;
 573         }
 574         if (!runtime->hw.formats) {
 575                 printk(KERN_ERR "ASoC: %s <-> %s No matching formats\n",
 576                         codec_dai_name, cpu_dai->name);
 577                 goto config_err;
 578         }
 579         if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
 580             runtime->hw.channels_min > runtime->hw.channels_max) {
 581                 printk(KERN_ERR "ASoC: %s <-> %s No matching channels\n",
 582                                 codec_dai_name, cpu_dai->name);
 583                 goto config_err;
 584         }
 585
 586         soc_pcm_apply_msb(substream);
 587
 588         /* Symmetry only applies if we've already got an active stream. */
 589         if (cpu_dai->active) {
 590                 ret = soc_pcm_apply_symmetry(substream, cpu_dai);
 591                 if (ret != 0)
 592                         goto config_err;
 593         }
 594
 595         for (i = 0; i < rtd->num_codecs; i++) {
 596                 if (rtd->codec_dais[i]->active) {
 597                         ret = soc_pcm_apply_symmetry(substream,
 598                                                      rtd->codec_dais[i]);
 599                         if (ret != 0)
 600                                 goto config_err;
 601                 }
 602         }
 603
 604         pr_debug("ASoC: %s <-> %s info:\n",
 605                         codec_dai_name, cpu_dai->name);
 606         pr_debug("ASoC: rate mask 0x%x\n", runtime->hw.rates);
 607         pr_debug("ASoC: min ch %d max ch %d\n", runtime->hw.channels_min,
 608                  runtime->hw.channels_max);
 609         pr_debug("ASoC: min rate %d max rate %d\n", runtime->hw.rate_min,
 610                  runtime->hw.rate_max);
 611
 612 dynamic:
 613
 614         snd_soc_runtime_activate(rtd, substream->stream);
 615
 616         mutex_unlock(&rtd->pcm_mutex);
 617         return 0;
 618
 619 config_err:
 620         if (rtd->dai_link->ops->shutdown)
 621                 rtd->dai_link->ops->shutdown(substream);
 622
 623 machine_err:
 624         i = rtd->num_codecs;
 625
 626 codec_dai_err:
 627         while (--i >= 0) {
 628                 codec_dai = rtd->codec_dais[i];
 629                 if (codec_dai->driver->ops->shutdown)
 630                         codec_dai->driver->ops->shutdown(substream, codec_dai);
 631         }
 632
 633 component_err:
 634         for_each_rtdcom(rtd, rtdcom) {
 635                 component = rtdcom->component;
 636
 637                 /* ignore duplication for now */
 638                 if (platform && (component == &platform->component))
 639                         continue;
 640
 641                 if (!component->driver->ops ||
 642                     !component->driver->ops->close)
 643                         continue;
 644
 645                 component->driver->ops->close(substream);
 646         }
 647
 648         if (platform && platform->driver->ops && platform->driver->ops->close)
 649                 platform->driver->ops->close(substream);
 650
 651 platform_err:
 652         if (cpu_dai->driver->ops->shutdown)
 653                 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
 654 out:
 655         mutex_unlock(&rtd->pcm_mutex);
 656
 657         for_each_rtdcom(rtd, rtdcom) {
 658                 component = rtdcom->component;
 659
 660                 pm_runtime_mark_last_busy(component->dev);
 661                 pm_runtime_put_autosuspend(component->dev);
 662         }
 663
 664         for (i = 0; i < rtd->num_codecs; i++) {
 665                 if (!rtd->codec_dais[i]->active)
 666                         pinctrl_pm_select_sleep_state(rtd->codec_dais[i]->dev);
 667         }
 668         if (!cpu_dai->active)
 669                 pinctrl_pm_select_sleep_state(cpu_dai->dev);
 670
 671         return ret;
 672 }
 673
 674 /*
 675  * Power down the audio subsystem pmdown_time msecs after close is called.
 676  * This is to ensure there are no pops or clicks in between any music tracks
 677  * due to DAPM power cycling.
 678  */
 679 static void close_delayed_work(struct work_struct *work)
 680 {
 681         struct snd_soc_pcm_runtime *rtd =
 682                         container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
 683         struct snd_soc_dai *codec_dai = rtd->codec_dais[0];
 684
 685         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 686
 687         dev_dbg(rtd->dev, "ASoC: pop wq checking: %s status: %s waiting: %s\n",
 688                  codec_dai->driver->playback.stream_name,
 689                  codec_dai->playback_active ? "active" : "inactive",
 690                  rtd->pop_wait ? "yes" : "no");
 691
 692         /* are we waiting on this codec DAI stream */
 693         if (rtd->pop_wait == 1) {
 694                 rtd->pop_wait = 0;
 695                 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
 696                                           SND_SOC_DAPM_STREAM_STOP);
 697         }
 698
 699         mutex_unlock(&rtd->pcm_mutex);
 700 }
 701
 702 /*
 703  * Called by ALSA when a PCM substream is closed. Private data can be
 704  * freed here. The cpu DAI, codec DAI, machine and platform are also
 705  * shutdown.
 706  */
 707 static int soc_pcm_close(struct snd_pcm_substream *substream)
 708 {
 709         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 710         struct snd_soc_platform *platform = rtd->platform;
 711         struct snd_soc_component *component;
 712         struct snd_soc_rtdcom_list *rtdcom;
 713         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 714         struct snd_soc_dai *codec_dai;
 715         int i;
 716
 717         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 718
 719         snd_soc_runtime_deactivate(rtd, substream->stream);
 720
 721         /* clear the corresponding DAIs rate when inactive */
 722         if (!cpu_dai->active)
 723                 cpu_dai->rate = 0;
 724
 725         for (i = 0; i < rtd->num_codecs; i++) {
 726                 codec_dai = rtd->codec_dais[i];
 727                 if (!codec_dai->active)
 728                         codec_dai->rate = 0;
 729         }
 730
 731         snd_soc_dai_digital_mute(cpu_dai, 1, substream->stream);
 732
 733         if (cpu_dai->driver->ops->shutdown)
 734                 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
 735
 736         for (i = 0; i < rtd->num_codecs; i++) {
 737                 codec_dai = rtd->codec_dais[i];
 738                 if (codec_dai->driver->ops->shutdown)
 739                         codec_dai->driver->ops->shutdown(substream, codec_dai);
 740         }
 741
 742         if (rtd->dai_link->ops->shutdown)
 743                 rtd->dai_link->ops->shutdown(substream);
 744
 745         if (platform && platform->driver->ops && platform->driver->ops->close)
 746                 platform->driver->ops->close(substream);
 747
 748         for_each_rtdcom(rtd, rtdcom) {
 749                 component = rtdcom->component;
 750
 751                 /* ignore duplication for now */
 752                 if (platform && (component == &platform->component))
 753                         continue;
 754
 755                 if (!component->driver->ops ||
 756                     !component->driver->ops->close)
 757                         continue;
 758
 759                 component->driver->ops->close(substream);
 760         }
 761
 762         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 763                 if (snd_soc_runtime_ignore_pmdown_time(rtd)) {
 764                         /* powered down playback stream now */
 765                         snd_soc_dapm_stream_event(rtd,
 766                                                   SNDRV_PCM_STREAM_PLAYBACK,
 767                                                   SND_SOC_DAPM_STREAM_STOP);
 768                 } else {
 769                         /* start delayed pop wq here for playback streams */
 770                         rtd->pop_wait = 1;
 771                         queue_delayed_work(system_power_efficient_wq,
 772                                            &rtd->delayed_work,
 773                                            msecs_to_jiffies(rtd->pmdown_time));
 774                 }
 775         } else {
 776                 /* capture streams can be powered down now */
 777                 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
 778                                           SND_SOC_DAPM_STREAM_STOP);
 779         }
 780
 781         mutex_unlock(&rtd->pcm_mutex);
 782
 783         for_each_rtdcom(rtd, rtdcom) {
 784                 component = rtdcom->component;
 785
 786                 pm_runtime_mark_last_busy(component->dev);
 787                 pm_runtime_put_autosuspend(component->dev);
 788         }
 789
 790         for (i = 0; i < rtd->num_codecs; i++) {
 791                 if (!rtd->codec_dais[i]->active)
 792                         pinctrl_pm_select_sleep_state(rtd->codec_dais[i]->dev);
 793         }
 794         if (!cpu_dai->active)
 795                 pinctrl_pm_select_sleep_state(cpu_dai->dev);
 796
 797         return 0;
 798 }
 799
 800 /*
 801  * Called by ALSA when the PCM substream is prepared, can set format, sample
 802  * rate, etc.  This function is non atomic and can be called multiple times,
 803  * it can refer to the runtime info.
 804  */
 805 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
 806 {
 807         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 808         struct snd_soc_platform *platform = rtd->platform;
 809         struct snd_soc_component *component;
 810         struct snd_soc_rtdcom_list *rtdcom;
 811         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 812         struct snd_soc_dai *codec_dai;
 813         int i, ret = 0;
 814
 815         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 816
 817         if (rtd->dai_link->ops->prepare) {
 818                 ret = rtd->dai_link->ops->prepare(substream);
 819                 if (ret < 0) {
 820                         dev_err(rtd->card->dev, "ASoC: machine prepare error:"
 821                                 " %d\n", ret);
 822                         goto out;
 823                 }
 824         }
 825
 826         if (platform && platform->driver->ops && platform->driver->ops->prepare) {
 827                 ret = platform->driver->ops->prepare(substream);
 828                 if (ret < 0) {
 829                         dev_err(platform->dev, "ASoC: platform prepare error:"
 830                                 " %d\n", ret);
 831                         goto out;
 832                 }
 833         }
 834
 835         for_each_rtdcom(rtd, rtdcom) {
 836                 component = rtdcom->component;
 837
 838                 /* ignore duplication for now */
 839                 if (platform && (component == &platform->component))
 840                         continue;
 841
 842                 if (!component->driver->ops ||
 843                     !component->driver->ops->prepare)
 844                         continue;
 845
 846                 ret = component->driver->ops->prepare(substream);
 847                 if (ret < 0) {
 848                         dev_err(component->dev,
 849                                 "ASoC: platform prepare error: %d\n", ret);
 850                         goto out;
 851                 }
 852         }
 853
 854         for (i = 0; i < rtd->num_codecs; i++) {
 855                 codec_dai = rtd->codec_dais[i];
 856                 if (codec_dai->driver->ops->prepare) {
 857                         ret = codec_dai->driver->ops->prepare(substream,
 858                                                               codec_dai);
 859                         if (ret < 0) {
 860                                 dev_err(codec_dai->dev,
 861                                         "ASoC: codec DAI prepare error: %d\n",
 862                                         ret);
 863                                 goto out;
 864                         }
 865                 }
 866         }
 867
 868         if (cpu_dai->driver->ops->prepare) {
 869                 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
 870                 if (ret < 0) {
 871                         dev_err(cpu_dai->dev,
 872                                 "ASoC: cpu DAI prepare error: %d\n", ret);
 873                         goto out;
 874                 }
 875         }
 876
 877         /* cancel any delayed stream shutdown that is pending */
 878         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 879             rtd->pop_wait) {
 880                 rtd->pop_wait = 0;
 881                 cancel_delayed_work(&rtd->delayed_work);
 882         }
 883
 884         snd_soc_dapm_stream_event(rtd, substream->stream,
 885                         SND_SOC_DAPM_STREAM_START);
 886
 887         for (i = 0; i < rtd->num_codecs; i++)
 888                 snd_soc_dai_digital_mute(rtd->codec_dais[i], 0,
 889                                          substream->stream);
 890         snd_soc_dai_digital_mute(cpu_dai, 0, substream->stream);
 891
 892 out:
 893         mutex_unlock(&rtd->pcm_mutex);
 894         return ret;
 895 }
 896
 897 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params,
 898                                        unsigned int mask)
 899 {
 900         struct snd_interval *interval;
 901         int channels = hweight_long(mask);
 902
 903         interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
 904         interval->min = channels;
 905         interval->max = channels;
 906 }
 907
 908 int soc_dai_hw_params(struct snd_pcm_substream *substream,
 909                       struct snd_pcm_hw_params *params,
 910                       struct snd_soc_dai *dai)
 911 {
 912         int ret;
 913
 914         if (dai->driver->ops->hw_params) {
 915                 ret = dai->driver->ops->hw_params(substream, params, dai);
 916                 if (ret < 0) {
 917                         dev_err(dai->dev, "ASoC: can't set %s hw params: %d\n",
 918                                 dai->name, ret);
 919                         return ret;
 920                 }
 921         }
 922
 923         return 0;
 924 }
 925
 926 /*
 927  * Called by ALSA when the hardware params are set by application. This
 928  * function can also be called multiple times and can allocate buffers
 929  * (using snd_pcm_lib_* ). It's non-atomic.
 930  */
 931 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
 932                                 struct snd_pcm_hw_params *params)
 933 {
 934         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 935         struct snd_soc_platform *platform = rtd->platform;
 936         struct snd_soc_component *component;
 937         struct snd_soc_rtdcom_list *rtdcom;
 938         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 939         int i, ret = 0, __ret;
 940
 941         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 942         if (rtd->dai_link->ops->hw_params) {
 943                 ret = rtd->dai_link->ops->hw_params(substream, params);
 944                 if (ret < 0) {
 945                         dev_err(rtd->card->dev, "ASoC: machine hw_params"
 946                                 " failed: %d\n", ret);
 947                         goto out;
 948                 }
 949         }
 950
 951         for (i = 0; i < rtd->num_codecs; i++) {
 952                 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
 953                 struct snd_pcm_hw_params codec_params;
 954
 955                 /*
 956                  * Skip CODECs which don't support the current stream type,
 957                  * the idea being that if a CODEC is not used for the currently
 958                  * set up transfer direction, it should not need to be
 959                  * configured, especially since the configuration used might
 960                  * not even be supported by that CODEC. There may be cases
 961                  * however where a CODEC needs to be set up although it is
 962                  * actually not being used for the transfer, e.g. if a
 963                  * capture-only CODEC is acting as an LRCLK and/or BCLK master
 964                  * for the DAI link including a playback-only CODEC.
 965                  * If this becomes necessary, we will have to augment the
 966                  * machine driver setup with information on how to act, so
 967                  * we can do the right thing here.
 968                  */
 969                 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
 970                         continue;
 971
 972                 /* copy params for each codec */
 973                 codec_params = *params;
 974
 975                 /* fixup params based on TDM slot masks */
 976                 if (codec_dai->tx_mask)
 977                         soc_pcm_codec_params_fixup(&codec_params,
 978                                                    codec_dai->tx_mask);
 979                 if (codec_dai->rx_mask)
 980                         soc_pcm_codec_params_fixup(&codec_params,
 981                                                    codec_dai->rx_mask);
 982
 983                 ret = soc_dai_hw_params(substream, &codec_params, codec_dai);
 984                 if(ret < 0)
 985                         goto codec_err;
 986
 987                 codec_dai->rate = params_rate(&codec_params);
 988                 codec_dai->channels = params_channels(&codec_params);
 989                 codec_dai->sample_bits = snd_pcm_format_physical_width(
 990                                                 params_format(&codec_params));
 991         }
 992
 993         ret = soc_dai_hw_params(substream, params, cpu_dai);
 994         if (ret < 0)
 995                 goto interface_err;
 996
 997         if (platform && platform->driver->ops && platform->driver->ops->hw_params) {
 998                 ret = platform->driver->ops->hw_params(substream, params);
 999                 if (ret < 0) {
1000                         dev_err(platform->dev, "ASoC: %s hw params failed: %d\n",
1001                                platform->component.name, ret);
1002                         goto platform_err;
1003                 }
1004         }
1005
1006         ret = 0;
1007         for_each_rtdcom(rtd, rtdcom) {
1008                 component = rtdcom->component;
1009
1010                 /* ignore duplication for now */
1011                 if (platform && (component == &platform->component))
1012                         continue;
1013
1014                 if (!component->driver->ops ||
1015                     !component->driver->ops->hw_params)
1016                         continue;
1017
1018                 __ret = component->driver->ops->hw_params(substream, params);
1019                 if (__ret < 0) {
1020                         dev_err(component->dev,
1021                                 "ASoC: %s hw params failed: %d\n",
1022                                 component->name, ret);
1023                         ret = __ret;
1024                 }
1025         }
1026         if (ret < 0)
1027                 goto component_err;
1028
1029         /* store the parameters for each DAIs */
1030         cpu_dai->rate = params_rate(params);
1031         cpu_dai->channels = params_channels(params);
1032         cpu_dai->sample_bits =
1033                 snd_pcm_format_physical_width(params_format(params));
1034
1035         ret = soc_pcm_params_symmetry(substream, params);
1036         if (ret)
1037                 goto component_err;
1038 out:
1039         mutex_unlock(&rtd->pcm_mutex);
1040         return ret;
1041
1042 component_err:
1043         for_each_rtdcom(rtd, rtdcom) {
1044                 component = rtdcom->component;
1045
1046                 /* ignore duplication */
1047                 if (platform && (component == &platform->component))
1048                         continue;
1049
1050                 if (!component->driver->ops ||
1051                     !component->driver->ops->hw_free)
1052                         continue;
1053
1054                 component->driver->ops->hw_free(substream);
1055         }
1056
1057         if (platform && platform->driver->ops && platform->driver->ops->hw_free)
1058                 platform->driver->ops->hw_free(substream);
1059
1060 platform_err:
1061         if (cpu_dai->driver->ops->hw_free)
1062                 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
1063
1064 interface_err:
1065         i = rtd->num_codecs;
1066
1067 codec_err:
1068         while (--i >= 0) {
1069                 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
1070                 if (codec_dai->driver->ops->hw_free)
1071                         codec_dai->driver->ops->hw_free(substream, codec_dai);
1072                 codec_dai->rate = 0;
1073         }
1074
1075         if (rtd->dai_link->ops->hw_free)
1076                 rtd->dai_link->ops->hw_free(substream);
1077
1078         mutex_unlock(&rtd->pcm_mutex);
1079         return ret;
1080 }
1081
1082 /*
1083  * Frees resources allocated by hw_params, can be called multiple times
1084  */
1085 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
1086 {
1087         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1088         struct snd_soc_platform *platform = rtd->platform;
1089         struct snd_soc_component *component;
1090         struct snd_soc_rtdcom_list *rtdcom;
1091         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1092         struct snd_soc_dai *codec_dai;
1093         bool playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
1094         int i;
1095
1096         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
1097
1098         /* clear the corresponding DAIs parameters when going to be inactive */
1099         if (cpu_dai->active == 1) {
1100                 cpu_dai->rate = 0;
1101                 cpu_dai->channels = 0;
1102                 cpu_dai->sample_bits = 0;
1103         }
1104
1105         for (i = 0; i < rtd->num_codecs; i++) {
1106                 codec_dai = rtd->codec_dais[i];
1107                 if (codec_dai->active == 1) {
1108                         codec_dai->rate = 0;
1109                         codec_dai->channels = 0;
1110                         codec_dai->sample_bits = 0;
1111                 }
1112         }
1113
1114         /* apply codec digital mute */
1115         for (i = 0; i < rtd->num_codecs; i++) {
1116                 if ((playback && rtd->codec_dais[i]->playback_active == 1) ||
1117                     (!playback && rtd->codec_dais[i]->capture_active == 1))
1118                         snd_soc_dai_digital_mute(rtd->codec_dais[i], 1,
1119                                                  substream->stream);
1120         }
1121
1122         /* free any machine hw params */
1123         if (rtd->dai_link->ops->hw_free)
1124                 rtd->dai_link->ops->hw_free(substream);
1125
1126         /* free any DMA resources */
1127         if (platform && platform->driver->ops && platform->driver->ops->hw_free)
1128                 platform->driver->ops->hw_free(substream);
1129
1130         /* free any component resources */
1131         for_each_rtdcom(rtd, rtdcom) {
1132                 component = rtdcom->component;
1133
1134                 /* ignore duplication for now */
1135                 if (platform && (component == &platform->component))
1136                         continue;
1137
1138                 if (!component->driver->ops ||
1139                     !component->driver->ops->hw_free)
1140                         continue;
1141
1142                 component->driver->ops->hw_free(substream);
1143         }
1144
1145         /* now free hw params for the DAIs  */
1146         for (i = 0; i < rtd->num_codecs; i++) {
1147                 codec_dai = rtd->codec_dais[i];
1148                 if (codec_dai->driver->ops->hw_free)
1149                         codec_dai->driver->ops->hw_free(substream, codec_dai);
1150         }
1151
1152         if (cpu_dai->driver->ops->hw_free)
1153                 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
1154
1155         mutex_unlock(&rtd->pcm_mutex);
1156         return 0;
1157 }
1158
1159 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
1160 {
1161         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1162         struct snd_soc_platform *platform = rtd->platform;
1163         struct snd_soc_component *component;
1164         struct snd_soc_rtdcom_list *rtdcom;
1165         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1166         struct snd_soc_dai *codec_dai;
1167         int i, ret;
1168
1169         for (i = 0; i < rtd->num_codecs; i++) {
1170                 codec_dai = rtd->codec_dais[i];
1171                 if (codec_dai->driver->ops->trigger) {
1172                         ret = codec_dai->driver->ops->trigger(substream,
1173                                                               cmd, codec_dai);
1174                         if (ret < 0)
1175                                 return ret;
1176                 }
1177         }
1178
1179         if (platform && platform->driver->ops && platform->driver->ops->trigger) {
1180                 ret = platform->driver->ops->trigger(substream, cmd);
1181                 if (ret < 0)
1182                         return ret;
1183         }
1184
1185         for_each_rtdcom(rtd, rtdcom) {
1186                 component = rtdcom->component;
1187
1188                 /* ignore duplication for now */
1189                 if (platform && (component == &platform->component))
1190                         continue;
1191
1192                 if (!component->driver->ops ||
1193                     !component->driver->ops->trigger)
1194                         continue;
1195
1196                 ret = component->driver->ops->trigger(substream, cmd);
1197                 if (ret < 0)
1198                         return ret;
1199         }
1200
1201         if (cpu_dai->driver->ops->trigger) {
1202                 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
1203                 if (ret < 0)
1204                         return ret;
1205         }
1206
1207         if (rtd->dai_link->ops->trigger) {
1208                 ret = rtd->dai_link->ops->trigger(substream, cmd);
1209                 if (ret < 0)
1210                         return ret;
1211         }
1212
1213         return 0;
1214 }
1215
1216 static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
1217                                    int cmd)
1218 {
1219         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1220         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1221         struct snd_soc_dai *codec_dai;
1222         int i, ret;
1223
1224         for (i = 0; i < rtd->num_codecs; i++) {
1225                 codec_dai = rtd->codec_dais[i];
1226                 if (codec_dai->driver->ops->bespoke_trigger) {
1227                         ret = codec_dai->driver->ops->bespoke_trigger(substream,
1228                                                                 cmd, codec_dai);
1229                         if (ret < 0)
1230                                 return ret;
1231                 }
1232         }
1233
1234         if (cpu_dai->driver->ops->bespoke_trigger) {
1235                 ret = cpu_dai->driver->ops->bespoke_trigger(substream, cmd, cpu_dai);
1236                 if (ret < 0)
1237                         return ret;
1238         }
1239         return 0;
1240 }
1241 /*
1242  * soc level wrapper for pointer callback
1243  * If cpu_dai, codec_dai, platform driver has the delay callback, than
1244  * the runtime->delay will be updated accordingly.
1245  */
1246 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1247 {
1248         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1249         struct snd_soc_platform *platform = rtd->platform;
1250         struct snd_soc_component *component;
1251         struct snd_soc_rtdcom_list *rtdcom;
1252         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1253         struct snd_soc_dai *codec_dai;
1254         struct snd_pcm_runtime *runtime = substream->runtime;
1255         snd_pcm_uframes_t offset = 0;
1256         snd_pcm_sframes_t delay = 0;
1257         snd_pcm_sframes_t codec_delay = 0;
1258         int i;
1259
1260         if (platform && platform->driver->ops && platform->driver->ops->pointer)
1261                 offset = platform->driver->ops->pointer(substream);
1262
1263         for_each_rtdcom(rtd, rtdcom) {
1264                 component = rtdcom->component;
1265
1266                 /* ignore duplication for now */
1267                 if (platform && (component == &platform->component))
1268                         continue;
1269
1270                 if (!component->driver->ops ||
1271                     !component->driver->ops->pointer)
1272                         continue;
1273
1274                 /* FIXME: use 1st pointer */
1275                 offset = component->driver->ops->pointer(substream);
1276                 break;
1277         }
1278
1279         if (cpu_dai->driver->ops->delay)
1280                 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
1281
1282         for (i = 0; i < rtd->num_codecs; i++) {
1283                 codec_dai = rtd->codec_dais[i];
1284                 if (codec_dai->driver->ops->delay)
1285                         codec_delay = max(codec_delay,
1286                                         codec_dai->driver->ops->delay(substream,
1287                                                                     codec_dai));
1288         }
1289         delay += codec_delay;
1290
1291         runtime->delay = delay;
1292
1293         return offset;
1294 }
1295
1296 /* connect a FE and BE */
1297 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1298                 struct snd_soc_pcm_runtime *be, int stream)
1299 {
1300         struct snd_soc_dpcm *dpcm;
1301
1302         /* only add new dpcms */
1303         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1304                 if (dpcm->be == be && dpcm->fe == fe)
1305                         return 0;
1306         }
1307
1308         dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1309         if (!dpcm)
1310                 return -ENOMEM;
1311
1312         dpcm->be = be;
1313         dpcm->fe = fe;
1314         be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
1315         dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1316         list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1317         list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1318
1319         dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1320                         stream ? "capture" : "playback",  fe->dai_link->name,
1321                         stream ? "<-" : "->", be->dai_link->name);
1322
1323 #ifdef CONFIG_DEBUG_FS
1324         if (fe->debugfs_dpcm_root)
1325                 dpcm->debugfs_state = debugfs_create_u32(be->dai_link->name, 0644,
1326                                 fe->debugfs_dpcm_root, &dpcm->state);
1327 #endif
1328         return 1;
1329 }
1330
1331 /* reparent a BE onto another FE */
1332 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1333                         struct snd_soc_pcm_runtime *be, int stream)
1334 {
1335         struct snd_soc_dpcm *dpcm;
1336         struct snd_pcm_substream *fe_substream, *be_substream;
1337
1338         /* reparent if BE is connected to other FEs */
1339         if (!be->dpcm[stream].users)
1340                 return;
1341
1342         be_substream = snd_soc_dpcm_get_substream(be, stream);
1343
1344         list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
1345                 if (dpcm->fe == fe)
1346                         continue;
1347
1348                 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1349                         stream ? "capture" : "playback",
1350                         dpcm->fe->dai_link->name,
1351                         stream ? "<-" : "->", dpcm->be->dai_link->name);
1352
1353                 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1354                 be_substream->runtime = fe_substream->runtime;
1355                 break;
1356         }
1357 }
1358
1359 /* disconnect a BE and FE */
1360 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1361 {
1362         struct snd_soc_dpcm *dpcm, *d;
1363
1364         list_for_each_entry_safe(dpcm, d, &fe->dpcm[stream].be_clients, list_be) {
1365                 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1366                                 stream ? "capture" : "playback",
1367                                 dpcm->be->dai_link->name);
1368
1369                 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1370                         continue;
1371
1372                 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1373                         stream ? "capture" : "playback", fe->dai_link->name,
1374                         stream ? "<-" : "->", dpcm->be->dai_link->name);
1375
1376                 /* BEs still alive need new FE */
1377                 dpcm_be_reparent(fe, dpcm->be, stream);
1378
1379 #ifdef CONFIG_DEBUG_FS
1380                 debugfs_remove(dpcm->debugfs_state);
1381 #endif
1382                 list_del(&dpcm->list_be);
1383                 list_del(&dpcm->list_fe);
1384                 kfree(dpcm);
1385         }
1386 }
1387
1388 /* get BE for DAI widget and stream */
1389 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1390                 struct snd_soc_dapm_widget *widget, int stream)
1391 {
1392         struct snd_soc_pcm_runtime *be;
1393         int i;
1394
1395         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1396                 list_for_each_entry(be, &card->rtd_list, list) {
1397
1398                         if (!be->dai_link->no_pcm)
1399                                 continue;
1400
1401                         if (be->cpu_dai->playback_widget == widget)
1402                                 return be;
1403
1404                         for (i = 0; i < be->num_codecs; i++) {
1405                                 struct snd_soc_dai *dai = be->codec_dais[i];
1406                                 if (dai->playback_widget == widget)
1407                                         return be;
1408                         }
1409                 }
1410         } else {
1411
1412                 list_for_each_entry(be, &card->rtd_list, list) {
1413
1414                         if (!be->dai_link->no_pcm)
1415                                 continue;
1416
1417                         if (be->cpu_dai->capture_widget == widget)
1418                                 return be;
1419
1420                         for (i = 0; i < be->num_codecs; i++) {
1421                                 struct snd_soc_dai *dai = be->codec_dais[i];
1422                                 if (dai->capture_widget == widget)
1423                                         return be;
1424                         }
1425                 }
1426         }
1427
1428         dev_err(card->dev, "ASoC: can't get %s BE for %s\n",
1429                 stream ? "capture" : "playback", widget->name);
1430         return NULL;
1431 }
1432
1433 static inline struct snd_soc_dapm_widget *
1434         dai_get_widget(struct snd_soc_dai *dai, int stream)
1435 {
1436         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1437                 return dai->playback_widget;
1438         else
1439                 return dai->capture_widget;
1440 }
1441
1442 static int widget_in_list(struct snd_soc_dapm_widget_list *list,
1443                 struct snd_soc_dapm_widget *widget)
1444 {
1445         int i;
1446
1447         for (i = 0; i < list->num_widgets; i++) {
1448                 if (widget == list->widgets[i])
1449                         return 1;
1450         }
1451
1452         return 0;
1453 }
1454
1455 static bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget,
1456                 enum snd_soc_dapm_direction dir)
1457 {
1458         struct snd_soc_card *card = widget->dapm->card;
1459         struct snd_soc_pcm_runtime *rtd;
1460         int i;
1461
1462         if (dir == SND_SOC_DAPM_DIR_OUT) {
1463                 list_for_each_entry(rtd, &card->rtd_list, list) {
1464                         if (!rtd->dai_link->no_pcm)
1465                                 continue;
1466
1467                         if (rtd->cpu_dai->playback_widget == widget)
1468                                 return true;
1469
1470                         for (i = 0; i < rtd->num_codecs; ++i) {
1471                                 struct snd_soc_dai *dai = rtd->codec_dais[i];
1472                                 if (dai->playback_widget == widget)
1473                                         return true;
1474                         }
1475                 }
1476         } else { /* SND_SOC_DAPM_DIR_IN */
1477                 list_for_each_entry(rtd, &card->rtd_list, list) {
1478                         if (!rtd->dai_link->no_pcm)
1479                                 continue;
1480
1481                         if (rtd->cpu_dai->capture_widget == widget)
1482                                 return true;
1483
1484                         for (i = 0; i < rtd->num_codecs; ++i) {
1485                                 struct snd_soc_dai *dai = rtd->codec_dais[i];
1486                                 if (dai->capture_widget == widget)
1487                                         return true;
1488                         }
1489                 }
1490         }
1491
1492         return false;
1493 }
1494
1495 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1496         int stream, struct snd_soc_dapm_widget_list **list)
1497 {
1498         struct snd_soc_dai *cpu_dai = fe->cpu_dai;
1499         int paths;
1500
1501         /* get number of valid DAI paths and their widgets */
1502         paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
1503                         dpcm_end_walk_at_be);
1504
1505         dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1506                         stream ? "capture" : "playback");
1507
1508         return paths;
1509 }
1510
1511 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1512         struct snd_soc_dapm_widget_list **list_)
1513 {
1514         struct snd_soc_dpcm *dpcm;
1515         struct snd_soc_dapm_widget_list *list = *list_;
1516         struct snd_soc_dapm_widget *widget;
1517         int prune = 0;
1518
1519         /* Destroy any old FE <--> BE connections */
1520         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1521                 unsigned int i;
1522
1523                 /* is there a valid CPU DAI widget for this BE */
1524                 widget = dai_get_widget(dpcm->be->cpu_dai, stream);
1525
1526                 /* prune the BE if it's no longer in our active list */
1527                 if (widget && widget_in_list(list, widget))
1528                         continue;
1529
1530                 /* is there a valid CODEC DAI widget for this BE */
1531                 for (i = 0; i < dpcm->be->num_codecs; i++) {
1532                         struct snd_soc_dai *dai = dpcm->be->codec_dais[i];
1533                         widget = dai_get_widget(dai, stream);
1534
1535                         /* prune the BE if it's no longer in our active list */
1536                         if (widget && widget_in_list(list, widget))
1537                                 continue;
1538                 }
1539
1540                 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1541                         stream ? "capture" : "playback",
1542                         dpcm->be->dai_link->name, fe->dai_link->name);
1543                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1544                 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1545                 prune++;
1546         }
1547
1548         dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1549         return prune;
1550 }
1551
1552 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1553         struct snd_soc_dapm_widget_list **list_)
1554 {
1555         struct snd_soc_card *card = fe->card;
1556         struct snd_soc_dapm_widget_list *list = *list_;
1557         struct snd_soc_pcm_runtime *be;
1558         int i, new = 0, err;
1559
1560         /* Create any new FE <--> BE connections */
1561         for (i = 0; i < list->num_widgets; i++) {
1562
1563                 switch (list->widgets[i]->id) {
1564                 case snd_soc_dapm_dai_in:
1565                         if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1566                                 continue;
1567                         break;
1568                 case snd_soc_dapm_dai_out:
1569                         if (stream != SNDRV_PCM_STREAM_CAPTURE)
1570                                 continue;
1571                         break;
1572                 default:
1573                         continue;
1574                 }
1575
1576                 /* is there a valid BE rtd for this widget */
1577                 be = dpcm_get_be(card, list->widgets[i], stream);
1578                 if (!be) {
1579                         dev_err(fe->dev, "ASoC: no BE found for %s\n",
1580                                         list->widgets[i]->name);
1581                         continue;
1582                 }
1583
1584                 /* make sure BE is a real BE */
1585                 if (!be->dai_link->no_pcm)
1586                         continue;
1587
1588                 /* don't connect if FE is not running */
1589                 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
1590                         continue;
1591
1592                 /* newly connected FE and BE */
1593                 err = dpcm_be_connect(fe, be, stream);
1594                 if (err < 0) {
1595                         dev_err(fe->dev, "ASoC: can't connect %s\n",
1596                                 list->widgets[i]->name);
1597                         break;
1598                 } else if (err == 0) /* already connected */
1599                         continue;
1600
1601                 /* new */
1602                 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1603                 new++;
1604         }
1605
1606         dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1607         return new;
1608 }
1609
1610 /*
1611  * Find the corresponding BE DAIs that source or sink audio to this
1612  * FE substream.
1613  */
1614 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1615         int stream, struct snd_soc_dapm_widget_list **list, int new)
1616 {
1617         if (new)
1618                 return dpcm_add_paths(fe, stream, list);
1619         else
1620                 return dpcm_prune_paths(fe, stream, list);
1621 }
1622
1623 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1624 {
1625         struct snd_soc_dpcm *dpcm;
1626
1627         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
1628                 dpcm->be->dpcm[stream].runtime_update =
1629                                                 SND_SOC_DPCM_UPDATE_NO;
1630 }
1631
1632 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
1633         int stream)
1634 {
1635         struct snd_soc_dpcm *dpcm;
1636
1637         /* disable any enabled and non active backends */
1638         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1639
1640                 struct snd_soc_pcm_runtime *be = dpcm->be;
1641                 struct snd_pcm_substream *be_substream =
1642                         snd_soc_dpcm_get_substream(be, stream);
1643
1644                 if (be->dpcm[stream].users == 0)
1645                         dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1646                                 stream ? "capture" : "playback",
1647                                 be->dpcm[stream].state);
1648
1649                 if (--be->dpcm[stream].users != 0)
1650                         continue;
1651
1652                 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1653                         continue;
1654
1655                 soc_pcm_close(be_substream);
1656                 be_substream->runtime = NULL;
1657                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1658         }
1659 }
1660
1661 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1662 {
1663         struct snd_soc_dpcm *dpcm;
1664         int err, count = 0;
1665
1666         /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1667         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1668
1669                 struct snd_soc_pcm_runtime *be = dpcm->be;
1670                 struct snd_pcm_substream *be_substream =
1671                         snd_soc_dpcm_get_substream(be, stream);
1672
1673                 if (!be_substream) {
1674                         dev_err(be->dev, "ASoC: no backend %s stream\n",
1675                                 stream ? "capture" : "playback");
1676                         continue;
1677                 }
1678
1679                 /* is this op for this BE ? */
1680                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1681                         continue;
1682
1683                 /* first time the dpcm is open ? */
1684                 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
1685                         dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1686                                 stream ? "capture" : "playback",
1687                                 be->dpcm[stream].state);
1688
1689                 if (be->dpcm[stream].users++ != 0)
1690                         continue;
1691
1692                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1693                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1694                         continue;
1695
1696                 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1697                         stream ? "capture" : "playback", be->dai_link->name);
1698
1699                 be_substream->runtime = be->dpcm[stream].runtime;
1700                 err = soc_pcm_open(be_substream);
1701                 if (err < 0) {
1702                         dev_err(be->dev, "ASoC: BE open failed %d\n", err);
1703                         be->dpcm[stream].users--;
1704                         if (be->dpcm[stream].users < 0)
1705                                 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1706                                         stream ? "capture" : "playback",
1707                                         be->dpcm[stream].state);
1708
1709                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1710                         goto unwind;
1711                 }
1712
1713                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1714                 count++;
1715         }
1716
1717         return count;
1718
1719 unwind:
1720         /* disable any enabled and non active backends */
1721         list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1722                 struct snd_soc_pcm_runtime *be = dpcm->be;
1723                 struct snd_pcm_substream *be_substream =
1724                         snd_soc_dpcm_get_substream(be, stream);
1725
1726                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1727                         continue;
1728
1729                 if (be->dpcm[stream].users == 0)
1730                         dev_err(be->dev, "ASoC: no users %s at close %d\n",
1731                                 stream ? "capture" : "playback",
1732                                 be->dpcm[stream].state);
1733
1734                 if (--be->dpcm[stream].users != 0)
1735                         continue;
1736
1737                 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1738                         continue;
1739
1740                 soc_pcm_close(be_substream);
1741                 be_substream->runtime = NULL;
1742                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1743         }
1744
1745         return err;
1746 }
1747
1748 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
1749                                  struct snd_soc_pcm_stream *stream,
1750                                  u64 formats)
1751 {
1752         runtime->hw.rate_min = stream->rate_min;
1753         runtime->hw.rate_max = stream->rate_max;
1754         runtime->hw.channels_min = stream->channels_min;
1755         runtime->hw.channels_max = stream->channels_max;
1756         if (runtime->hw.formats)
1757                 runtime->hw.formats &= formats & stream->formats;
1758         else
1759                 runtime->hw.formats = formats & stream->formats;
1760         runtime->hw.rates = stream->rates;
1761 }
1762
1763 static u64 dpcm_runtime_base_format(struct snd_pcm_substream *substream)
1764 {
1765         struct snd_soc_pcm_runtime *fe = substream->private_data;
1766         struct snd_soc_dpcm *dpcm;
1767         u64 formats = ULLONG_MAX;
1768         int stream = substream->stream;
1769
1770         if (!fe->dai_link->dpcm_merged_format)
1771                 return formats;
1772
1773         /*
1774          * It returns merged BE codec format
1775          * if FE want to use it (= dpcm_merged_format)
1776          */
1777
1778         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1779                 struct snd_soc_pcm_runtime *be = dpcm->be;
1780                 struct snd_soc_dai_driver *codec_dai_drv;
1781                 struct snd_soc_pcm_stream *codec_stream;
1782                 int i;
1783
1784                 for (i = 0; i < be->num_codecs; i++) {
1785                         codec_dai_drv = be->codec_dais[i]->driver;
1786                         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1787                                 codec_stream = &codec_dai_drv->playback;
1788                         else
1789                                 codec_stream = &codec_dai_drv->capture;
1790
1791                         formats &= codec_stream->formats;
1792                 }
1793         }
1794
1795         return formats;
1796 }
1797
1798 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
1799 {
1800         struct snd_pcm_runtime *runtime = substream->runtime;
1801         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1802         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1803         struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
1804         u64 format = dpcm_runtime_base_format(substream);
1805
1806         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1807                 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback, format);
1808         else
1809                 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture, format);
1810 }
1811
1812 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
1813
1814 /* Set FE's runtime_update state; the state is protected via PCM stream lock
1815  * for avoiding the race with trigger callback.
1816  * If the state is unset and a trigger is pending while the previous operation,
1817  * process the pending trigger action here.
1818  */
1819 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
1820                                      int stream, enum snd_soc_dpcm_update state)
1821 {
1822         struct snd_pcm_substream *substream =
1823                 snd_soc_dpcm_get_substream(fe, stream);
1824
1825         snd_pcm_stream_lock_irq(substream);
1826         if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
1827                 dpcm_fe_dai_do_trigger(substream,
1828                                        fe->dpcm[stream].trigger_pending - 1);
1829                 fe->dpcm[stream].trigger_pending = 0;
1830         }
1831         fe->dpcm[stream].runtime_update = state;
1832         snd_pcm_stream_unlock_irq(substream);
1833 }
1834
1835 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
1836                                int stream)
1837 {
1838         struct snd_soc_dpcm *dpcm;
1839         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1840         struct snd_soc_dai *fe_cpu_dai = fe->cpu_dai;
1841         int err;
1842
1843         /* apply symmetry for FE */
1844         if (soc_pcm_has_symmetry(fe_substream))
1845                 fe_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1846
1847         /* Symmetry only applies if we've got an active stream. */
1848         if (fe_cpu_dai->active) {
1849                 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
1850                 if (err < 0)
1851                         return err;
1852         }
1853
1854         /* apply symmetry for BE */
1855         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1856                 struct snd_soc_pcm_runtime *be = dpcm->be;
1857                 struct snd_pcm_substream *be_substream =
1858                         snd_soc_dpcm_get_substream(be, stream);
1859                 struct snd_soc_pcm_runtime *rtd = be_substream->private_data;
1860                 int i;
1861
1862                 if (rtd->dai_link->be_hw_params_fixup)
1863                         continue;
1864
1865                 if (soc_pcm_has_symmetry(be_substream))
1866                         be_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1867
1868                 /* Symmetry only applies if we've got an active stream. */
1869                 if (rtd->cpu_dai->active) {
1870                         err = soc_pcm_apply_symmetry(be_substream, rtd->cpu_dai);
1871                         if (err < 0)
1872                                 return err;
1873                 }
1874
1875                 for (i = 0; i < rtd->num_codecs; i++) {
1876                         if (rtd->codec_dais[i]->active) {
1877                                 err = soc_pcm_apply_symmetry(be_substream,
1878                                                              rtd->codec_dais[i]);
1879                                 if (err < 0)
1880                                         return err;
1881                         }
1882                 }
1883         }
1884
1885         return 0;
1886 }
1887
1888 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1889 {
1890         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1891         struct snd_pcm_runtime *runtime = fe_substream->runtime;
1892         int stream = fe_substream->stream, ret = 0;
1893
1894         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1895
1896         ret = dpcm_be_dai_startup(fe, fe_substream->stream);
1897         if (ret < 0) {
1898                 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
1899                 goto be_err;
1900         }
1901
1902         dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1903
1904         /* start the DAI frontend */
1905         ret = soc_pcm_open(fe_substream);
1906         if (ret < 0) {
1907                 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
1908                 goto unwind;
1909         }
1910
1911         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1912
1913         dpcm_set_fe_runtime(fe_substream);
1914         snd_pcm_limit_hw_rates(runtime);
1915
1916         ret = dpcm_apply_symmetry(fe_substream, stream);
1917         if (ret < 0) {
1918                 dev_err(fe->dev, "ASoC: failed to apply dpcm symmetry %d\n",
1919                         ret);
1920                 goto unwind;
1921         }
1922
1923         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1924         return 0;
1925
1926 unwind:
1927         dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
1928 be_err:
1929         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1930         return ret;
1931 }
1932
1933 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1934 {
1935         struct snd_soc_dpcm *dpcm;
1936
1937         /* only shutdown BEs that are either sinks or sources to this FE DAI */
1938         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1939
1940                 struct snd_soc_pcm_runtime *be = dpcm->be;
1941                 struct snd_pcm_substream *be_substream =
1942                         snd_soc_dpcm_get_substream(be, stream);
1943
1944                 /* is this op for this BE ? */
1945                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1946                         continue;
1947
1948                 if (be->dpcm[stream].users == 0)
1949                         dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1950                                 stream ? "capture" : "playback",
1951                                 be->dpcm[stream].state);
1952
1953                 if (--be->dpcm[stream].users != 0)
1954                         continue;
1955
1956                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1957                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN))
1958                         continue;
1959
1960                 dev_dbg(be->dev, "ASoC: close BE %s\n",
1961                         be->dai_link->name);
1962
1963                 soc_pcm_close(be_substream);
1964                 be_substream->runtime = NULL;
1965
1966                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1967         }
1968         return 0;
1969 }
1970
1971 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
1972 {
1973         struct snd_soc_pcm_runtime *fe = substream->private_data;
1974         int stream = substream->stream;
1975
1976         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1977
1978         /* shutdown the BEs */
1979         dpcm_be_dai_shutdown(fe, substream->stream);
1980
1981         dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
1982
1983         /* now shutdown the frontend */
1984         soc_pcm_close(substream);
1985
1986         /* run the stream event for each BE */
1987         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
1988
1989         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1990         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1991         return 0;
1992 }
1993
1994 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
1995 {
1996         struct snd_soc_dpcm *dpcm;
1997
1998         /* only hw_params backends that are either sinks or sources
1999          * to this frontend DAI */
2000         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2001
2002                 struct snd_soc_pcm_runtime *be = dpcm->be;
2003                 struct snd_pcm_substream *be_substream =
2004                         snd_soc_dpcm_get_substream(be, stream);
2005
2006                 /* is this op for this BE ? */
2007                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2008                         continue;
2009
2010                 /* only free hw when no longer used - check all FEs */
2011                 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2012                                 continue;
2013
2014                 /* do not free hw if this BE is used by other FE */
2015                 if (be->dpcm[stream].users > 1)
2016                         continue;
2017
2018                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2019                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2020                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2021                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
2022                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2023                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2024                         continue;
2025
2026                 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
2027                         be->dai_link->name);
2028
2029                 soc_pcm_hw_free(be_substream);
2030
2031                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2032         }
2033
2034         return 0;
2035 }
2036
2037 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
2038 {
2039         struct snd_soc_pcm_runtime *fe = substream->private_data;
2040         int err, stream = substream->stream;
2041
2042         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2043         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2044
2045         dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
2046
2047         /* call hw_free on the frontend */
2048         err = soc_pcm_hw_free(substream);
2049         if (err < 0)
2050                 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
2051                         fe->dai_link->name);
2052
2053         /* only hw_params backends that are either sinks or sources
2054          * to this frontend DAI */
2055         err = dpcm_be_dai_hw_free(fe, stream);
2056
2057         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2058         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2059
2060         mutex_unlock(&fe->card->mutex);
2061         return 0;
2062 }
2063
2064 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
2065 {
2066         struct snd_soc_dpcm *dpcm;
2067         int ret;
2068
2069         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2070
2071                 struct snd_soc_pcm_runtime *be = dpcm->be;
2072                 struct snd_pcm_substream *be_substream =
2073                         snd_soc_dpcm_get_substream(be, stream);
2074
2075                 /* is this op for this BE ? */
2076                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2077                         continue;
2078
2079                 /* copy params for each dpcm */
2080                 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
2081                                 sizeof(struct snd_pcm_hw_params));
2082
2083                 /* perform any hw_params fixups */
2084                 if (be->dai_link->be_hw_params_fixup) {
2085                         ret = be->dai_link->be_hw_params_fixup(be,
2086                                         &dpcm->hw_params);
2087                         if (ret < 0) {
2088                                 dev_err(be->dev,
2089                                         "ASoC: hw_params BE fixup failed %d\n",
2090                                         ret);
2091                                 goto unwind;
2092                         }
2093                 }
2094
2095                 /* only allow hw_params() if no connected FEs are running */
2096                 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
2097                         continue;
2098
2099                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2100                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2101                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
2102                         continue;
2103
2104                 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
2105                         be->dai_link->name);
2106
2107                 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
2108                 if (ret < 0) {
2109                         dev_err(dpcm->be->dev,
2110                                 "ASoC: hw_params BE failed %d\n", ret);
2111                         goto unwind;
2112                 }
2113
2114                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2115         }
2116         return 0;
2117
2118 unwind:
2119         /* disable any enabled and non active backends */
2120         list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2121                 struct snd_soc_pcm_runtime *be = dpcm->be;
2122                 struct snd_pcm_substream *be_substream =
2123                         snd_soc_dpcm_get_substream(be, stream);
2124
2125                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2126                         continue;
2127
2128                 /* only allow hw_free() if no connected FEs are running */
2129                 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2130                         continue;
2131
2132                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2133                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2134                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2135                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2136                         continue;
2137
2138                 soc_pcm_hw_free(be_substream);
2139         }
2140
2141         return ret;
2142 }
2143
2144 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
2145                                  struct snd_pcm_hw_params *params)
2146 {
2147         struct snd_soc_pcm_runtime *fe = substream->private_data;
2148         int ret, stream = substream->stream;
2149
2150         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2151         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2152
2153         memcpy(&fe->dpcm[substream->stream].hw_params, params,
2154                         sizeof(struct snd_pcm_hw_params));
2155         ret = dpcm_be_dai_hw_params(fe, substream->stream);
2156         if (ret < 0) {
2157                 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
2158                 goto out;
2159         }
2160
2161         dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
2162                         fe->dai_link->name, params_rate(params),
2163                         params_channels(params), params_format(params));
2164
2165         /* call hw_params on the frontend */
2166         ret = soc_pcm_hw_params(substream, params);
2167         if (ret < 0) {
2168                 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
2169                 dpcm_be_dai_hw_free(fe, stream);
2170          } else
2171                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2172
2173 out:
2174         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2175         mutex_unlock(&fe->card->mutex);
2176         return ret;
2177 }
2178
2179 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
2180                 struct snd_pcm_substream *substream, int cmd)
2181 {
2182         int ret;
2183
2184         dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n",
2185                         dpcm->be->dai_link->name, cmd);
2186
2187         ret = soc_pcm_trigger(substream, cmd);
2188         if (ret < 0)
2189                 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret);
2190
2191         return ret;
2192 }
2193
2194 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
2195                                int cmd)
2196 {
2197         struct snd_soc_dpcm *dpcm;
2198         int ret = 0;
2199
2200         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2201
2202                 struct snd_soc_pcm_runtime *be = dpcm->be;
2203                 struct snd_pcm_substream *be_substream =
2204                         snd_soc_dpcm_get_substream(be, stream);
2205
2206                 /* is this op for this BE ? */
2207                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2208                         continue;
2209
2210                 switch (cmd) {
2211                 case SNDRV_PCM_TRIGGER_START:
2212                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2213                             (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2214                                 continue;
2215
2216                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2217                         if (ret)
2218                                 return ret;
2219
2220                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2221                         break;
2222                 case SNDRV_PCM_TRIGGER_RESUME:
2223                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2224                                 continue;
2225
2226                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2227                         if (ret)
2228                                 return ret;
2229
2230                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2231                         break;
2232                 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2233                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2234                                 continue;
2235
2236                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2237                         if (ret)
2238                                 return ret;
2239
2240                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2241                         break;
2242                 case SNDRV_PCM_TRIGGER_STOP:
2243                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2244                                 continue;
2245
2246                         if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2247                                 continue;
2248
2249                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2250                         if (ret)
2251                                 return ret;
2252
2253                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2254                         break;
2255                 case SNDRV_PCM_TRIGGER_SUSPEND:
2256                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2257                                 continue;
2258
2259                         if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2260                                 continue;
2261
2262                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2263                         if (ret)
2264                                 return ret;
2265
2266                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
2267                         break;
2268                 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2269                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2270                                 continue;
2271
2272                         if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2273                                 continue;
2274
2275                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2276                         if (ret)
2277                                 return ret;
2278
2279                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2280                         break;
2281                 }
2282         }
2283
2284         return ret;
2285 }
2286 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2287
2288 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
2289 {
2290         struct snd_soc_pcm_runtime *fe = substream->private_data;
2291         int stream = substream->stream, ret;
2292         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2293
2294         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2295
2296         switch (trigger) {
2297         case SND_SOC_DPCM_TRIGGER_PRE:
2298                 /* call trigger on the frontend before the backend. */
2299
2300                 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2301                                 fe->dai_link->name, cmd);
2302
2303                 ret = soc_pcm_trigger(substream, cmd);
2304                 if (ret < 0) {
2305                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2306                         goto out;
2307                 }
2308
2309                 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2310                 break;
2311         case SND_SOC_DPCM_TRIGGER_POST:
2312                 /* call trigger on the frontend after the backend. */
2313
2314                 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2315                 if (ret < 0) {
2316                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2317                         goto out;
2318                 }
2319
2320                 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2321                                 fe->dai_link->name, cmd);
2322
2323                 ret = soc_pcm_trigger(substream, cmd);
2324                 break;
2325         case SND_SOC_DPCM_TRIGGER_BESPOKE:
2326                 /* bespoke trigger() - handles both FE and BEs */
2327
2328                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
2329                                 fe->dai_link->name, cmd);
2330
2331                 ret = soc_pcm_bespoke_trigger(substream, cmd);
2332                 if (ret < 0) {
2333                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2334                         goto out;
2335                 }
2336                 break;
2337         default:
2338                 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
2339                                 fe->dai_link->name);
2340                 ret = -EINVAL;
2341                 goto out;
2342         }
2343
2344         switch (cmd) {
2345         case SNDRV_PCM_TRIGGER_START:
2346         case SNDRV_PCM_TRIGGER_RESUME:
2347         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2348                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2349                 break;
2350         case SNDRV_PCM_TRIGGER_STOP:
2351         case SNDRV_PCM_TRIGGER_SUSPEND:
2352                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2353                 break;
2354         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2355                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2356                 break;
2357         }
2358
2359 out:
2360         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2361         return ret;
2362 }
2363
2364 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2365 {
2366         struct snd_soc_pcm_runtime *fe = substream->private_data;
2367         int stream = substream->stream;
2368
2369         /* if FE's runtime_update is already set, we're in race;
2370          * process this trigger later at exit
2371          */
2372         if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2373                 fe->dpcm[stream].trigger_pending = cmd + 1;
2374                 return 0; /* delayed, assuming it's successful */
2375         }
2376
2377         /* we're alone, let's trigger */
2378         return dpcm_fe_dai_do_trigger(substream, cmd);
2379 }
2380
2381 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2382 {
2383         struct snd_soc_dpcm *dpcm;
2384         int ret = 0;
2385
2386         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2387
2388                 struct snd_soc_pcm_runtime *be = dpcm->be;
2389                 struct snd_pcm_substream *be_substream =
2390                         snd_soc_dpcm_get_substream(be, stream);
2391
2392                 /* is this op for this BE ? */
2393                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2394                         continue;
2395
2396                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2397                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2398                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2399                         continue;
2400
2401                 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2402                         be->dai_link->name);
2403
2404                 ret = soc_pcm_prepare(be_substream);
2405                 if (ret < 0) {
2406                         dev_err(be->dev, "ASoC: backend prepare failed %d\n",
2407                                 ret);
2408                         break;
2409                 }
2410
2411                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2412         }
2413         return ret;
2414 }
2415
2416 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2417 {
2418         struct snd_soc_pcm_runtime *fe = substream->private_data;
2419         int stream = substream->stream, ret = 0;
2420
2421         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2422
2423         dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2424
2425         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2426
2427         /* there is no point preparing this FE if there are no BEs */
2428         if (list_empty(&fe->dpcm[stream].be_clients)) {
2429                 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2430                                 fe->dai_link->name);
2431                 ret = -EINVAL;
2432                 goto out;
2433         }
2434
2435         ret = dpcm_be_dai_prepare(fe, substream->stream);
2436         if (ret < 0)
2437                 goto out;
2438
2439         /* call prepare on the frontend */
2440         ret = soc_pcm_prepare(substream);
2441         if (ret < 0) {
2442                 dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
2443                         fe->dai_link->name);
2444                 goto out;
2445         }
2446
2447         /* run the stream event for each BE */
2448         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
2449         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2450
2451 out:
2452         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2453         mutex_unlock(&fe->card->mutex);
2454
2455         return ret;
2456 }
2457
2458 static int soc_pcm_ioctl(struct snd_pcm_substream *substream,
2459                      unsigned int cmd, void *arg)
2460 {
2461         struct snd_soc_pcm_runtime *rtd = substream->private_data;
2462         struct snd_soc_platform *platform = rtd->platform;
2463         struct snd_soc_component *component;
2464         struct snd_soc_rtdcom_list *rtdcom;
2465
2466         if (platform && platform->driver->ops && platform->driver->ops->ioctl)
2467                 return platform->driver->ops->ioctl(substream, cmd, arg);
2468
2469         for_each_rtdcom(rtd, rtdcom) {
2470                 component = rtdcom->component;
2471
2472                 /* ignore duplication for now */
2473                 if (platform && (component == &platform->component))
2474                         continue;
2475
2476                 if (!component->driver->ops ||
2477                     !component->driver->ops->ioctl)
2478                         continue;
2479
2480                 /* FIXME: use 1st ioctl */
2481                 return component->driver->ops->ioctl(substream, cmd, arg);
2482         }
2483
2484         return snd_pcm_lib_ioctl(substream, cmd, arg);
2485 }
2486
2487 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2488 {
2489         struct snd_pcm_substream *substream =
2490                 snd_soc_dpcm_get_substream(fe, stream);
2491         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2492         int err;
2493
2494         dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2495                         stream ? "capture" : "playback", fe->dai_link->name);
2496
2497         if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2498                 /* call bespoke trigger - FE takes care of all BE triggers */
2499                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2500                                 fe->dai_link->name);
2501
2502                 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2503                 if (err < 0)
2504                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2505         } else {
2506                 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2507                         fe->dai_link->name);
2508
2509                 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2510                 if (err < 0)
2511                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2512         }
2513
2514         err = dpcm_be_dai_hw_free(fe, stream);
2515         if (err < 0)
2516                 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
2517
2518         err = dpcm_be_dai_shutdown(fe, stream);
2519         if (err < 0)
2520                 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
2521
2522         /* run the stream event for each BE */
2523         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2524
2525         return 0;
2526 }
2527
2528 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2529 {
2530         struct snd_pcm_substream *substream =
2531                 snd_soc_dpcm_get_substream(fe, stream);
2532         struct snd_soc_dpcm *dpcm;
2533         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2534         int ret;
2535
2536         dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2537                         stream ? "capture" : "playback", fe->dai_link->name);
2538
2539         /* Only start the BE if the FE is ready */
2540         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2541                 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
2542                 return -EINVAL;
2543
2544         /* startup must always be called for new BEs */
2545         ret = dpcm_be_dai_startup(fe, stream);
2546         if (ret < 0)
2547                 goto disconnect;
2548
2549         /* keep going if FE state is > open */
2550         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2551                 return 0;
2552
2553         ret = dpcm_be_dai_hw_params(fe, stream);
2554         if (ret < 0)
2555                 goto close;
2556
2557         /* keep going if FE state is > hw_params */
2558         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2559                 return 0;
2560
2561
2562         ret = dpcm_be_dai_prepare(fe, stream);
2563         if (ret < 0)
2564                 goto hw_free;
2565
2566         /* run the stream event for each BE */
2567         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2568
2569         /* keep going if FE state is > prepare */
2570         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2571                 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2572                 return 0;
2573
2574         if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2575                 /* call trigger on the frontend - FE takes care of all BE triggers */
2576                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
2577                                 fe->dai_link->name);
2578
2579                 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2580                 if (ret < 0) {
2581                         dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
2582                         goto hw_free;
2583                 }
2584         } else {
2585                 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2586                         fe->dai_link->name);
2587
2588                 ret = dpcm_be_dai_trigger(fe, stream,
2589                                         SNDRV_PCM_TRIGGER_START);
2590                 if (ret < 0) {
2591                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2592                         goto hw_free;
2593                 }
2594         }
2595
2596         return 0;
2597
2598 hw_free:
2599         dpcm_be_dai_hw_free(fe, stream);
2600 close:
2601         dpcm_be_dai_shutdown(fe, stream);
2602 disconnect:
2603         /* disconnect any non started BEs */
2604         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2605                 struct snd_soc_pcm_runtime *be = dpcm->be;
2606                 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2607                                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2608         }
2609
2610         return ret;
2611 }
2612
2613 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
2614 {
2615         int ret;
2616
2617         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2618         ret = dpcm_run_update_startup(fe, stream);
2619         if (ret < 0)
2620                 dev_err(fe->dev, "ASoC: failed to startup some BEs\n");
2621         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2622
2623         return ret;
2624 }
2625
2626 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
2627 {
2628         int ret;
2629
2630         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2631         ret = dpcm_run_update_shutdown(fe, stream);
2632         if (ret < 0)
2633                 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
2634         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2635
2636         return ret;
2637 }
2638
2639 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2640  * any DAI links.
2641  */
2642 int soc_dpcm_runtime_update(struct snd_soc_card *card)
2643 {
2644         struct snd_soc_pcm_runtime *fe;
2645         int old, new, paths;
2646
2647         mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2648         list_for_each_entry(fe, &card->rtd_list, list) {
2649                 struct snd_soc_dapm_widget_list *list;
2650
2651                 /* make sure link is FE */
2652                 if (!fe->dai_link->dynamic)
2653                         continue;
2654
2655                 /* only check active links */
2656                 if (!fe->cpu_dai->active)
2657                         continue;
2658
2659                 /* DAPM sync will call this to update DSP paths */
2660                 dev_dbg(fe->dev, "ASoC: DPCM runtime update for FE %s\n",
2661                         fe->dai_link->name);
2662
2663                 /* skip if FE doesn't have playback capability */
2664                 if (!fe->cpu_dai->driver->playback.channels_min
2665                     || !fe->codec_dai->driver->playback.channels_min)
2666                         goto capture;
2667
2668                 /* skip if FE isn't currently playing */
2669                 if (!fe->cpu_dai->playback_active
2670                     || !fe->codec_dai->playback_active)
2671                         goto capture;
2672
2673                 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
2674                 if (paths < 0) {
2675                         dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2676                                         fe->dai_link->name,  "playback");
2677                         mutex_unlock(&card->mutex);
2678                         return paths;
2679                 }
2680
2681                 /* update any new playback paths */
2682                 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 1);
2683                 if (new) {
2684                         dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2685                         dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2686                         dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2687                 }
2688
2689                 /* update any old playback paths */
2690                 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 0);
2691                 if (old) {
2692                         dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2693                         dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2694                         dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2695                 }
2696
2697                 dpcm_path_put(&list);
2698 capture:
2699                 /* skip if FE doesn't have capture capability */
2700                 if (!fe->cpu_dai->driver->capture.channels_min
2701                     || !fe->codec_dai->driver->capture.channels_min)
2702                         continue;
2703
2704                 /* skip if FE isn't currently capturing */
2705                 if (!fe->cpu_dai->capture_active
2706                     || !fe->codec_dai->capture_active)
2707                         continue;
2708
2709                 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
2710                 if (paths < 0) {
2711                         dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2712                                         fe->dai_link->name,  "capture");
2713                         mutex_unlock(&card->mutex);
2714                         return paths;
2715                 }
2716
2717                 /* update any new capture paths */
2718                 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 1);
2719                 if (new) {
2720                         dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2721                         dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2722                         dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2723                 }
2724
2725                 /* update any old capture paths */
2726                 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 0);
2727                 if (old) {
2728                         dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2729                         dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2730                         dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2731                 }
2732
2733                 dpcm_path_put(&list);
2734         }
2735
2736         mutex_unlock(&card->mutex);
2737         return 0;
2738 }
2739 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
2740 {
2741         struct snd_soc_dpcm *dpcm;
2742         struct list_head *clients =
2743                 &fe->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients;
2744
2745         list_for_each_entry(dpcm, clients, list_be) {
2746
2747                 struct snd_soc_pcm_runtime *be = dpcm->be;
2748                 int i;
2749
2750                 if (be->dai_link->ignore_suspend)
2751                         continue;
2752
2753                 for (i = 0; i < be->num_codecs; i++) {
2754                         struct snd_soc_dai *dai = be->codec_dais[i];
2755                         struct snd_soc_dai_driver *drv = dai->driver;
2756
2757                         dev_dbg(be->dev, "ASoC: BE digital mute %s\n",
2758                                          be->dai_link->name);
2759
2760                         if (drv->ops && drv->ops->digital_mute &&
2761                                                         dai->playback_active)
2762                                 drv->ops->digital_mute(dai, mute);
2763                 }
2764         }
2765
2766         return 0;
2767 }
2768
2769 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2770 {
2771         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2772         struct snd_soc_dpcm *dpcm;
2773         struct snd_soc_dapm_widget_list *list;
2774         int ret;
2775         int stream = fe_substream->stream;
2776
2777         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2778         fe->dpcm[stream].runtime = fe_substream->runtime;
2779
2780         ret = dpcm_path_get(fe, stream, &list);
2781         if (ret < 0) {
2782                 mutex_unlock(&fe->card->mutex);
2783                 return ret;
2784         } else if (ret == 0) {
2785                 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
2786                         fe->dai_link->name, stream ? "capture" : "playback");
2787         }
2788
2789         /* calculate valid and active FE <-> BE dpcms */
2790         dpcm_process_paths(fe, stream, &list, 1);
2791
2792         ret = dpcm_fe_dai_startup(fe_substream);
2793         if (ret < 0) {
2794                 /* clean up all links */
2795                 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
2796                         dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2797
2798                 dpcm_be_disconnect(fe, stream);
2799                 fe->dpcm[stream].runtime = NULL;
2800         }
2801
2802         dpcm_clear_pending_state(fe, stream);
2803         dpcm_path_put(&list);
2804         mutex_unlock(&fe->card->mutex);
2805         return ret;
2806 }
2807
2808 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2809 {
2810         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2811         struct snd_soc_dpcm *dpcm;
2812         int stream = fe_substream->stream, ret;
2813
2814         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2815         ret = dpcm_fe_dai_shutdown(fe_substream);
2816
2817         /* mark FE's links ready to prune */
2818         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
2819                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2820
2821         dpcm_be_disconnect(fe, stream);
2822
2823         fe->dpcm[stream].runtime = NULL;
2824         mutex_unlock(&fe->card->mutex);
2825         return ret;
2826 }
2827
2828 static void soc_pcm_private_free(struct snd_pcm *pcm)
2829 {
2830         struct snd_soc_pcm_runtime *rtd = pcm->private_data;
2831         struct snd_soc_rtdcom_list *rtdcom;
2832         struct snd_soc_component *component;
2833
2834         for_each_rtdcom(rtd, rtdcom) {
2835                 /* need to sync the delayed work before releasing resources */
2836
2837                 flush_delayed_work(&rtd->delayed_work);
2838                 component = rtdcom->component;
2839
2840                 if (component->pcm_free)
2841                         component->pcm_free(component, pcm);
2842         }
2843 }
2844
2845 static int soc_rtdcom_ack(struct snd_pcm_substream *substream)
2846 {
2847         struct snd_soc_pcm_runtime *rtd = substream->private_data;
2848         struct snd_soc_rtdcom_list *rtdcom;
2849         struct snd_soc_component *component;
2850
2851         for_each_rtdcom(rtd, rtdcom) {
2852                 component = rtdcom->component;
2853
2854                 if (!component->driver->ops ||
2855                     !component->driver->ops->ack)
2856                         continue;
2857
2858                 /* FIXME. it returns 1st ask now */
2859                 return component->driver->ops->ack(substream);
2860         }
2861
2862         return -EINVAL;
2863 }
2864
2865 static int soc_rtdcom_copy_user(struct snd_pcm_substream *substream, int channel,
2866                                 unsigned long pos, void __user *buf,
2867                                 unsigned long bytes)
2868 {
2869         struct snd_soc_pcm_runtime *rtd = substream->private_data;
2870         struct snd_soc_rtdcom_list *rtdcom;
2871         struct snd_soc_component *component;
2872
2873         for_each_rtdcom(rtd, rtdcom) {
2874                 component = rtdcom->component;
2875
2876                 if (!component->driver->ops ||
2877                     !component->driver->ops->copy_user)
2878                         continue;
2879
2880                 /* FIXME. it returns 1st copy now */
2881                 return component->driver->ops->copy_user(substream, channel,
2882                                                          pos, buf, bytes);
2883         }
2884
2885         return -EINVAL;
2886 }
2887
2888 static int soc_rtdcom_copy_kernel(struct snd_pcm_substream *substream, int channel,
2889                                   unsigned long pos, void *buf, unsigned long bytes)
2890 {
2891         struct snd_soc_pcm_runtime *rtd = substream->private_data;
2892         struct snd_soc_rtdcom_list *rtdcom;
2893         struct snd_soc_component *component;
2894
2895         for_each_rtdcom(rtd, rtdcom) {
2896                 component = rtdcom->component;
2897
2898                 if (!component->driver->ops ||
2899                     !component->driver->ops->copy_kernel)
2900                         continue;
2901
2902                 /* FIXME. it returns 1st copy now */
2903                 return component->driver->ops->copy_kernel(substream, channel,
2904                                                            pos, buf, bytes);
2905         }
2906
2907         return -EINVAL;
2908 }
2909
2910 static int soc_rtdcom_fill_silence(struct snd_pcm_substream *substream, int channel,
2911                                    unsigned long pos, unsigned long bytes)
2912 {
2913         struct snd_soc_pcm_runtime *rtd = substream->private_data;
2914         struct snd_soc_rtdcom_list *rtdcom;
2915         struct snd_soc_component *component;
2916
2917         for_each_rtdcom(rtd, rtdcom) {
2918                 component = rtdcom->component;
2919
2920                 if (!component->driver->ops ||
2921                     !component->driver->ops->fill_silence)
2922                         continue;
2923
2924                 /* FIXME. it returns 1st silence now */
2925                 return component->driver->ops->fill_silence(substream, channel,
2926                                                             pos, bytes);
2927         }
2928
2929         return -EINVAL;
2930 }
2931
2932 static struct page *soc_rtdcom_page(struct snd_pcm_substream *substream,
2933                                     unsigned long offset)
2934 {
2935         struct snd_soc_pcm_runtime *rtd = substream->private_data;
2936         struct snd_soc_rtdcom_list *rtdcom;
2937         struct snd_soc_component *component;
2938         struct page *page;
2939
2940         for_each_rtdcom(rtd, rtdcom) {
2941                 component = rtdcom->component;
2942
2943                 if (!component->driver->ops ||
2944                     !component->driver->ops->page)
2945                         continue;
2946
2947                 /* FIXME. it returns 1st page now */
2948                 page = component->driver->ops->page(substream, offset);
2949                 if (page)
2950                         return page;
2951         }
2952
2953         return NULL;
2954 }
2955
2956 static int soc_rtdcom_mmap(struct snd_pcm_substream *substream,
2957                            struct vm_area_struct *vma)
2958 {
2959         struct snd_soc_pcm_runtime *rtd = substream->private_data;
2960         struct snd_soc_rtdcom_list *rtdcom;
2961         struct snd_soc_component *component;
2962
2963         for_each_rtdcom(rtd, rtdcom) {
2964                 component = rtdcom->component;
2965
2966                 if (!component->driver->ops ||
2967                     !component->driver->ops->mmap)
2968                         continue;
2969
2970                 /* FIXME. it returns 1st mmap now */
2971                 return component->driver->ops->mmap(substream, vma);
2972         }
2973
2974         return -EINVAL;
2975 }
2976
2977 /* create a new pcm */
2978 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2979 {
2980         struct snd_soc_platform *platform = rtd->platform;
2981         struct snd_soc_dai *codec_dai;
2982         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2983         struct snd_soc_component *component;
2984         struct snd_soc_rtdcom_list *rtdcom;
2985         struct snd_pcm *pcm;
2986         char new_name[64];
2987         int ret = 0, playback = 0, capture = 0;
2988         int i;
2989
2990         if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
2991                 playback = rtd->dai_link->dpcm_playback;
2992                 capture = rtd->dai_link->dpcm_capture;
2993         } else {
2994                 for (i = 0; i < rtd->num_codecs; i++) {
2995                         codec_dai = rtd->codec_dais[i];
2996                         if (codec_dai->driver->playback.channels_min)
2997                                 playback = 1;
2998                         if (codec_dai->driver->capture.channels_min)
2999                                 capture = 1;
3000                 }
3001
3002                 capture = capture && cpu_dai->driver->capture.channels_min;
3003                 playback = playback && cpu_dai->driver->playback.channels_min;
3004         }
3005
3006         if (rtd->dai_link->playback_only) {
3007                 playback = 1;
3008                 capture = 0;
3009         }
3010
3011         if (rtd->dai_link->capture_only) {
3012                 playback = 0;
3013                 capture = 1;
3014         }
3015
3016         /* create the PCM */
3017         if (rtd->dai_link->no_pcm) {
3018                 snprintf(new_name, sizeof(new_name), "(%s)",
3019                         rtd->dai_link->stream_name);
3020
3021                 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
3022                                 playback, capture, &pcm);
3023         } else {
3024                 if (rtd->dai_link->dynamic)
3025                         snprintf(new_name, sizeof(new_name), "%s (*)",
3026                                 rtd->dai_link->stream_name);
3027                 else
3028                         snprintf(new_name, sizeof(new_name), "%s %s-%d",
3029                                 rtd->dai_link->stream_name,
3030                                 (rtd->num_codecs > 1) ?
3031                                 "multicodec" : rtd->codec_dai->name, num);
3032
3033                 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
3034                         capture, &pcm);
3035         }
3036         if (ret < 0) {
3037                 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
3038                         rtd->dai_link->name);
3039                 return ret;
3040         }
3041         dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
3042
3043         /* DAPM dai link stream work */
3044         INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
3045
3046         pcm->nonatomic = rtd->dai_link->nonatomic;
3047         rtd->pcm = pcm;
3048         pcm->private_data = rtd;
3049
3050         if (rtd->dai_link->no_pcm) {
3051                 if (playback)
3052                         pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
3053                 if (capture)
3054                         pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
3055                 goto out;
3056         }
3057
3058         /* ASoC PCM operations */
3059         if (rtd->dai_link->dynamic) {
3060                 rtd->ops.open           = dpcm_fe_dai_open;
3061                 rtd->ops.hw_params      = dpcm_fe_dai_hw_params;
3062                 rtd->ops.prepare        = dpcm_fe_dai_prepare;
3063                 rtd->ops.trigger        = dpcm_fe_dai_trigger;
3064                 rtd->ops.hw_free        = dpcm_fe_dai_hw_free;
3065                 rtd->ops.close          = dpcm_fe_dai_close;
3066                 rtd->ops.pointer        = soc_pcm_pointer;
3067                 rtd->ops.ioctl          = soc_pcm_ioctl;
3068         } else {
3069                 rtd->ops.open           = soc_pcm_open;
3070                 rtd->ops.hw_params      = soc_pcm_hw_params;
3071                 rtd->ops.prepare        = soc_pcm_prepare;
3072                 rtd->ops.trigger        = soc_pcm_trigger;
3073                 rtd->ops.hw_free        = soc_pcm_hw_free;
3074                 rtd->ops.close          = soc_pcm_close;
3075                 rtd->ops.pointer        = soc_pcm_pointer;
3076                 rtd->ops.ioctl          = soc_pcm_ioctl;
3077         }
3078
3079         for_each_rtdcom(rtd, rtdcom) {
3080                 const struct snd_pcm_ops *ops = rtdcom->component->driver->ops;
3081
3082                 if (!ops)
3083                         continue;
3084
3085                 if (ops->ack)
3086                         rtd->ops.ack            = soc_rtdcom_ack;
3087                 if (ops->copy_user)
3088                         rtd->ops.copy_user      = soc_rtdcom_copy_user;
3089                 if (ops->copy_kernel)
3090                         rtd->ops.copy_kernel    = soc_rtdcom_copy_kernel;
3091                 if (ops->fill_silence)
3092                         rtd->ops.fill_silence   = soc_rtdcom_fill_silence;
3093                 if (ops->page)
3094                         rtd->ops.page           = soc_rtdcom_page;
3095                 if (ops->mmap)
3096                         rtd->ops.mmap           = soc_rtdcom_mmap;
3097         }
3098
3099         /* overwrite */
3100         if (platform && platform->driver->ops) {
3101                 rtd->ops.ack            = platform->driver->ops->ack;
3102                 rtd->ops.copy_user      = platform->driver->ops->copy_user;
3103                 rtd->ops.copy_kernel    = platform->driver->ops->copy_kernel;
3104                 rtd->ops.fill_silence   = platform->driver->ops->fill_silence;
3105                 rtd->ops.page           = platform->driver->ops->page;
3106                 rtd->ops.mmap           = platform->driver->ops->mmap;
3107         }
3108
3109         if (playback)
3110                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
3111
3112         if (capture)
3113                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
3114
3115         for_each_rtdcom(rtd, rtdcom) {
3116                 component = rtdcom->component;
3117
3118                 if (!component->pcm_new)
3119                         continue;
3120
3121                 ret = component->pcm_new(component, rtd);
3122                 if (ret < 0) {
3123                         dev_err(component->dev,
3124                                 "ASoC: pcm constructor failed: %d\n",
3125                                 ret);
3126                         return ret;
3127                 }
3128         }
3129
3130         pcm->private_free = soc_pcm_private_free;
3131 out:
3132         dev_info(rtd->card->dev, "%s <-> %s mapping ok\n",
3133                  (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name,
3134                  cpu_dai->name);
3135         return ret;
3136 }
3137
3138 /* is the current PCM operation for this FE ? */
3139 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
3140 {
3141         if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
3142                 return 1;
3143         return 0;
3144 }
3145 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
3146
3147 /* is the current PCM operation for this BE ? */
3148 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
3149                 struct snd_soc_pcm_runtime *be, int stream)
3150 {
3151         if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
3152            ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
3153                   be->dpcm[stream].runtime_update))
3154                 return 1;
3155         return 0;
3156 }
3157 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
3158
3159 /* get the substream for this BE */
3160 struct snd_pcm_substream *
3161         snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
3162 {
3163         return be->pcm->streams[stream].substream;
3164 }
3165 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
3166
3167 /* get the BE runtime state */
3168 enum snd_soc_dpcm_state
3169         snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream)
3170 {
3171         return be->dpcm[stream].state;
3172 }
3173 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state);
3174
3175 /* set the BE runtime state */
3176 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be,
3177                 int stream, enum snd_soc_dpcm_state state)
3178 {
3179         be->dpcm[stream].state = state;
3180 }
3181 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state);
3182
3183 /*
3184  * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
3185  * are not running, paused or suspended for the specified stream direction.
3186  */
3187 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
3188                 struct snd_soc_pcm_runtime *be, int stream)
3189 {
3190         struct snd_soc_dpcm *dpcm;
3191         int state;
3192
3193         list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
3194
3195                 if (dpcm->fe == fe)
3196                         continue;
3197
3198                 state = dpcm->fe->dpcm[stream].state;
3199                 if (state == SND_SOC_DPCM_STATE_START ||
3200                         state == SND_SOC_DPCM_STATE_PAUSED ||
3201                         state == SND_SOC_DPCM_STATE_SUSPEND)
3202                         return 0;
3203         }
3204
3205         /* it's safe to free/stop this BE DAI */
3206         return 1;
3207 }
3208 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
3209
3210 /*
3211  * We can only change hw params a BE DAI if any of it's FE are not prepared,
3212  * running, paused or suspended for the specified stream direction.
3213  */
3214 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
3215                 struct snd_soc_pcm_runtime *be, int stream)
3216 {
3217         struct snd_soc_dpcm *dpcm;
3218         int state;
3219
3220         list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
3221
3222                 if (dpcm->fe == fe)
3223                         continue;
3224
3225                 state = dpcm->fe->dpcm[stream].state;
3226                 if (state == SND_SOC_DPCM_STATE_START ||
3227                         state == SND_SOC_DPCM_STATE_PAUSED ||
3228                         state == SND_SOC_DPCM_STATE_SUSPEND ||
3229                         state == SND_SOC_DPCM_STATE_PREPARE)
3230                         return 0;
3231         }
3232
3233         /* it's safe to change hw_params */
3234         return 1;
3235 }
3236 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
3237
3238 #ifdef CONFIG_DEBUG_FS
3239 static const char *dpcm_state_string(enum snd_soc_dpcm_state state)
3240 {
3241         switch (state) {
3242         case SND_SOC_DPCM_STATE_NEW:
3243                 return "new";
3244         case SND_SOC_DPCM_STATE_OPEN:
3245                 return "open";
3246         case SND_SOC_DPCM_STATE_HW_PARAMS:
3247                 return "hw_params";
3248         case SND_SOC_DPCM_STATE_PREPARE:
3249                 return "prepare";
3250         case SND_SOC_DPCM_STATE_START:
3251                 return "start";
3252         case SND_SOC_DPCM_STATE_STOP:
3253                 return "stop";
3254         case SND_SOC_DPCM_STATE_SUSPEND:
3255                 return "suspend";
3256         case SND_SOC_DPCM_STATE_PAUSED:
3257                 return "paused";
3258         case SND_SOC_DPCM_STATE_HW_FREE:
3259                 return "hw_free";
3260         case SND_SOC_DPCM_STATE_CLOSE:
3261                 return "close";
3262         }
3263
3264         return "unknown";
3265 }
3266
3267 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
3268                                 int stream, char *buf, size_t size)
3269 {
3270         struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
3271         struct snd_soc_dpcm *dpcm;
3272         ssize_t offset = 0;
3273
3274         /* FE state */
3275         offset += snprintf(buf + offset, size - offset,
3276                         "[%s - %s]\n", fe->dai_link->name,
3277                         stream ? "Capture" : "Playback");
3278
3279         offset += snprintf(buf + offset, size - offset, "State: %s\n",
3280                         dpcm_state_string(fe->dpcm[stream].state));
3281
3282         if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3283             (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3284                 offset += snprintf(buf + offset, size - offset,
3285                                 "Hardware Params: "
3286                                 "Format = %s, Channels = %d, Rate = %d\n",
3287                                 snd_pcm_format_name(params_format(params)),
3288                                 params_channels(params),
3289                                 params_rate(params));
3290
3291         /* BEs state */
3292         offset += snprintf(buf + offset, size - offset, "Backends:\n");
3293
3294         if (list_empty(&fe->dpcm[stream].be_clients)) {
3295                 offset += snprintf(buf + offset, size - offset,
3296                                 " No active DSP links\n");
3297                 goto out;
3298         }
3299
3300         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
3301                 struct snd_soc_pcm_runtime *be = dpcm->be;
3302                 params = &dpcm->hw_params;
3303
3304                 offset += snprintf(buf + offset, size - offset,
3305                                 "- %s\n", be->dai_link->name);
3306
3307                 offset += snprintf(buf + offset, size - offset,
3308                                 "   State: %s\n",
3309                                 dpcm_state_string(be->dpcm[stream].state));
3310
3311                 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3312                     (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3313                         offset += snprintf(buf + offset, size - offset,
3314                                 "   Hardware Params: "
3315                                 "Format = %s, Channels = %d, Rate = %d\n",
3316                                 snd_pcm_format_name(params_format(params)),
3317                                 params_channels(params),
3318                                 params_rate(params));
3319         }
3320
3321 out:
3322         return offset;
3323 }
3324
3325 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
3326                                 size_t count, loff_t *ppos)
3327 {
3328         struct snd_soc_pcm_runtime *fe = file->private_data;
3329         ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
3330         char *buf;
3331
3332         buf = kmalloc(out_count, GFP_KERNEL);
3333         if (!buf)
3334                 return -ENOMEM;
3335
3336         if (fe->cpu_dai->driver->playback.channels_min)
3337                 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
3338                                         buf + offset, out_count - offset);
3339
3340         if (fe->cpu_dai->driver->capture.channels_min)
3341                 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE,
3342                                         buf + offset, out_count - offset);
3343
3344         ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
3345
3346         kfree(buf);
3347         return ret;
3348 }
3349
3350 static const struct file_operations dpcm_state_fops = {
3351         .open = simple_open,
3352         .read = dpcm_state_read_file,
3353         .llseek = default_llseek,
3354 };
3355
3356 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
3357 {
3358         if (!rtd->dai_link)
3359                 return;
3360
3361         if (!rtd->card->debugfs_card_root)
3362                 return;
3363
3364         rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
3365                         rtd->card->debugfs_card_root);
3366         if (!rtd->debugfs_dpcm_root) {
3367                 dev_dbg(rtd->dev,
3368                          "ASoC: Failed to create dpcm debugfs directory %s\n",
3369                          rtd->dai_link->name);
3370                 return;
3371         }
3372
3373         debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root,
3374                             rtd, &dpcm_state_fops);
3375 }
3376 #endif