sound/soc/soc-pcm.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 //
   3 // soc-pcm.c  --  ALSA SoC PCM
   4 //
   5 // Copyright 2005 Wolfson Microelectronics PLC.
   6 // Copyright 2005 Openedhand Ltd.
   7 // Copyright (C) 2010 Slimlogic Ltd.
   8 // Copyright (C) 2010 Texas Instruments Inc.
   9 //
  10 // Authors: Liam Girdwood <lrg@ti.com>
  11 //          Mark Brown <broonie@opensource.wolfsonmicro.com>
  12
  13 #include <linux/kernel.h>
  14 #include <linux/init.h>
  15 #include <linux/delay.h>
  16 #include <linux/pinctrl/consumer.h>
  17 #include <linux/pm_runtime.h>
  18 #include <linux/slab.h>
  19 #include <linux/workqueue.h>
  20 #include <linux/export.h>
  21 #include <linux/debugfs.h>
  22 #include <sound/core.h>
  23 #include <sound/pcm.h>
  24 #include <sound/pcm_params.h>
  25 #include <sound/soc.h>
  26 #include <sound/soc-dpcm.h>
  27 #include <sound/initval.h>
  28
  29 #define DPCM_MAX_BE_USERS       8
  30
  31 static int soc_rtd_startup(struct snd_soc_pcm_runtime *rtd,
  32                            struct snd_pcm_substream *substream)
  33 {
  34         if (rtd->dai_link->ops &&
  35             rtd->dai_link->ops->startup)
  36                 return rtd->dai_link->ops->startup(substream);
  37         return 0;
  38 }
  39
  40 static void soc_rtd_shutdown(struct snd_soc_pcm_runtime *rtd,
  41                              struct snd_pcm_substream *substream)
  42 {
  43         if (rtd->dai_link->ops &&
  44             rtd->dai_link->ops->shutdown)
  45                 rtd->dai_link->ops->shutdown(substream);
  46 }
  47
  48 static int soc_rtd_prepare(struct snd_soc_pcm_runtime *rtd,
  49                            struct snd_pcm_substream *substream)
  50 {
  51         if (rtd->dai_link->ops &&
  52             rtd->dai_link->ops->prepare)
  53                 return rtd->dai_link->ops->prepare(substream);
  54         return 0;
  55 }
  56
  57 static int soc_rtd_hw_params(struct snd_soc_pcm_runtime *rtd,
  58                              struct snd_pcm_substream *substream,
  59                              struct snd_pcm_hw_params *params)
  60 {
  61         if (rtd->dai_link->ops &&
  62             rtd->dai_link->ops->hw_params)
  63                 return rtd->dai_link->ops->hw_params(substream, params);
  64         return 0;
  65 }
  66
  67 static void soc_rtd_hw_free(struct snd_soc_pcm_runtime *rtd,
  68                             struct snd_pcm_substream *substream)
  69 {
  70         if (rtd->dai_link->ops &&
  71             rtd->dai_link->ops->hw_free)
  72                 rtd->dai_link->ops->hw_free(substream);
  73 }
  74
  75 static int soc_rtd_trigger(struct snd_soc_pcm_runtime *rtd,
  76                            struct snd_pcm_substream *substream,
  77                            int cmd)
  78 {
  79         if (rtd->dai_link->ops &&
  80             rtd->dai_link->ops->trigger)
  81                 return rtd->dai_link->ops->trigger(substream, cmd);
  82         return 0;
  83 }
  84
  85 /**
  86  * snd_soc_runtime_activate() - Increment active count for PCM runtime components
  87  * @rtd: ASoC PCM runtime that is activated
  88  * @stream: Direction of the PCM stream
  89  *
  90  * Increments the active count for all the DAIs and components attached to a PCM
  91  * runtime. Should typically be called when a stream is opened.
  92  *
  93  * Must be called with the rtd->card->pcm_mutex being held
  94  */
  95 void snd_soc_runtime_activate(struct snd_soc_pcm_runtime *rtd, int stream)
  96 {
  97         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  98         struct snd_soc_dai *codec_dai;
  99         int i;
 100
 101         lockdep_assert_held(&rtd->card->pcm_mutex);
 102
 103         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
 104                 cpu_dai->playback_active++;
 105                 for_each_rtd_codec_dai(rtd, i, codec_dai)
 106                         codec_dai->playback_active++;
 107         } else {
 108                 cpu_dai->capture_active++;
 109                 for_each_rtd_codec_dai(rtd, i, codec_dai)
 110                         codec_dai->capture_active++;
 111         }
 112
 113         cpu_dai->active++;
 114         cpu_dai->component->active++;
 115         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 116                 codec_dai->active++;
 117                 codec_dai->component->active++;
 118         }
 119 }
 120
 121 /**
 122  * snd_soc_runtime_deactivate() - Decrement active count for PCM runtime components
 123  * @rtd: ASoC PCM runtime that is deactivated
 124  * @stream: Direction of the PCM stream
 125  *
 126  * Decrements the active count for all the DAIs and components attached to a PCM
 127  * runtime. Should typically be called when a stream is closed.
 128  *
 129  * Must be called with the rtd->card->pcm_mutex being held
 130  */
 131 void snd_soc_runtime_deactivate(struct snd_soc_pcm_runtime *rtd, int stream)
 132 {
 133         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 134         struct snd_soc_dai *codec_dai;
 135         int i;
 136
 137         lockdep_assert_held(&rtd->card->pcm_mutex);
 138
 139         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
 140                 cpu_dai->playback_active--;
 141                 for_each_rtd_codec_dai(rtd, i, codec_dai)
 142                         codec_dai->playback_active--;
 143         } else {
 144                 cpu_dai->capture_active--;
 145                 for_each_rtd_codec_dai(rtd, i, codec_dai)
 146                         codec_dai->capture_active--;
 147         }
 148
 149         cpu_dai->active--;
 150         cpu_dai->component->active--;
 151         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 152                 codec_dai->component->active--;
 153                 codec_dai->active--;
 154         }
 155 }
 156
 157 /**
 158  * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay
 159  * @rtd: The ASoC PCM runtime that should be checked.
 160  *
 161  * This function checks whether the power down delay should be ignored for a
 162  * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has
 163  * been configured to ignore the delay, or if none of the components benefits
 164  * from having the delay.
 165  */
 166 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd)
 167 {
 168         struct snd_soc_component *component;
 169         bool ignore = true;
 170         int i;
 171
 172         if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time)
 173                 return true;
 174
 175         for_each_rtd_components(rtd, i, component)
 176                 ignore &= !component->driver->use_pmdown_time;
 177
 178         return ignore;
 179 }
 180
 181 /**
 182  * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
 183  * @substream: the pcm substream
 184  * @hw: the hardware parameters
 185  *
 186  * Sets the substream runtime hardware parameters.
 187  */
 188 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
 189         const struct snd_pcm_hardware *hw)
 190 {
 191         struct snd_pcm_runtime *runtime = substream->runtime;
 192         runtime->hw.info = hw->info;
 193         runtime->hw.formats = hw->formats;
 194         runtime->hw.period_bytes_min = hw->period_bytes_min;
 195         runtime->hw.period_bytes_max = hw->period_bytes_max;
 196         runtime->hw.periods_min = hw->periods_min;
 197         runtime->hw.periods_max = hw->periods_max;
 198         runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
 199         runtime->hw.fifo_size = hw->fifo_size;
 200         return 0;
 201 }
 202 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
 203
 204 /* DPCM stream event, send event to FE and all active BEs. */
 205 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
 206         int event)
 207 {
 208         struct snd_soc_dpcm *dpcm;
 209
 210         for_each_dpcm_be(fe, dir, dpcm) {
 211
 212                 struct snd_soc_pcm_runtime *be = dpcm->be;
 213
 214                 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n",
 215                                 be->dai_link->name, event, dir);
 216
 217                 if ((event == SND_SOC_DAPM_STREAM_STOP) &&
 218                     (be->dpcm[dir].users >= 1))
 219                         continue;
 220
 221                 snd_soc_dapm_stream_event(be, dir, event);
 222         }
 223
 224         snd_soc_dapm_stream_event(fe, dir, event);
 225
 226         return 0;
 227 }
 228
 229 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
 230                                         struct snd_soc_dai *soc_dai)
 231 {
 232         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 233         int ret;
 234
 235         if (soc_dai->rate && (soc_dai->driver->symmetric_rates ||
 236                                 rtd->dai_link->symmetric_rates)) {
 237                 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %dHz rate\n",
 238                                 soc_dai->rate);
 239
 240                 ret = snd_pcm_hw_constraint_single(substream->runtime,
 241                                                 SNDRV_PCM_HW_PARAM_RATE,
 242                                                 soc_dai->rate);
 243                 if (ret < 0) {
 244                         dev_err(soc_dai->dev,
 245                                 "ASoC: Unable to apply rate constraint: %d\n",
 246                                 ret);
 247                         return ret;
 248                 }
 249         }
 250
 251         if (soc_dai->channels && (soc_dai->driver->symmetric_channels ||
 252                                 rtd->dai_link->symmetric_channels)) {
 253                 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d channel(s)\n",
 254                                 soc_dai->channels);
 255
 256                 ret = snd_pcm_hw_constraint_single(substream->runtime,
 257                                                 SNDRV_PCM_HW_PARAM_CHANNELS,
 258                                                 soc_dai->channels);
 259                 if (ret < 0) {
 260                         dev_err(soc_dai->dev,
 261                                 "ASoC: Unable to apply channel symmetry constraint: %d\n",
 262                                 ret);
 263                         return ret;
 264                 }
 265         }
 266
 267         if (soc_dai->sample_bits && (soc_dai->driver->symmetric_samplebits ||
 268                                 rtd->dai_link->symmetric_samplebits)) {
 269                 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d sample bits\n",
 270                                 soc_dai->sample_bits);
 271
 272                 ret = snd_pcm_hw_constraint_single(substream->runtime,
 273                                                 SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
 274                                                 soc_dai->sample_bits);
 275                 if (ret < 0) {
 276                         dev_err(soc_dai->dev,
 277                                 "ASoC: Unable to apply sample bits symmetry constraint: %d\n",
 278                                 ret);
 279                         return ret;
 280                 }
 281         }
 282
 283         return 0;
 284 }
 285
 286 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream,
 287                                 struct snd_pcm_hw_params *params)
 288 {
 289         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 290         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 291         struct snd_soc_dai *codec_dai;
 292         unsigned int rate, channels, sample_bits, symmetry, i;
 293
 294         rate = params_rate(params);
 295         channels = params_channels(params);
 296         sample_bits = snd_pcm_format_physical_width(params_format(params));
 297
 298         /* reject unmatched parameters when applying symmetry */
 299         symmetry = cpu_dai->driver->symmetric_rates ||
 300                 rtd->dai_link->symmetric_rates;
 301
 302         for_each_rtd_codec_dai(rtd, i, codec_dai)
 303                 symmetry |= codec_dai->driver->symmetric_rates;
 304
 305         if (symmetry && cpu_dai->rate && cpu_dai->rate != rate) {
 306                 dev_err(rtd->dev, "ASoC: unmatched rate symmetry: %d - %d\n",
 307                                 cpu_dai->rate, rate);
 308                 return -EINVAL;
 309         }
 310
 311         symmetry = cpu_dai->driver->symmetric_channels ||
 312                 rtd->dai_link->symmetric_channels;
 313
 314         for_each_rtd_codec_dai(rtd, i, codec_dai)
 315                 symmetry |= codec_dai->driver->symmetric_channels;
 316
 317         if (symmetry && cpu_dai->channels && cpu_dai->channels != channels) {
 318                 dev_err(rtd->dev, "ASoC: unmatched channel symmetry: %d - %d\n",
 319                                 cpu_dai->channels, channels);
 320                 return -EINVAL;
 321         }
 322
 323         symmetry = cpu_dai->driver->symmetric_samplebits ||
 324                 rtd->dai_link->symmetric_samplebits;
 325
 326         for_each_rtd_codec_dai(rtd, i, codec_dai)
 327                 symmetry |= codec_dai->driver->symmetric_samplebits;
 328
 329         if (symmetry && cpu_dai->sample_bits && cpu_dai->sample_bits != sample_bits) {
 330                 dev_err(rtd->dev, "ASoC: unmatched sample bits symmetry: %d - %d\n",
 331                                 cpu_dai->sample_bits, sample_bits);
 332                 return -EINVAL;
 333         }
 334
 335         return 0;
 336 }
 337
 338 static bool soc_pcm_has_symmetry(struct snd_pcm_substream *substream)
 339 {
 340         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 341         struct snd_soc_dai_driver *cpu_driver = rtd->cpu_dai->driver;
 342         struct snd_soc_dai_link *link = rtd->dai_link;
 343         struct snd_soc_dai *codec_dai;
 344         unsigned int symmetry, i;
 345
 346         symmetry = cpu_driver->symmetric_rates || link->symmetric_rates ||
 347                 cpu_driver->symmetric_channels || link->symmetric_channels ||
 348                 cpu_driver->symmetric_samplebits || link->symmetric_samplebits;
 349
 350         for_each_rtd_codec_dai(rtd, i, codec_dai)
 351                 symmetry = symmetry ||
 352                         codec_dai->driver->symmetric_rates ||
 353                         codec_dai->driver->symmetric_channels ||
 354                         codec_dai->driver->symmetric_samplebits;
 355
 356         return symmetry;
 357 }
 358
 359 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits)
 360 {
 361         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 362         int ret;
 363
 364         if (!bits)
 365                 return;
 366
 367         ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits);
 368         if (ret != 0)
 369                 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n",
 370                                  bits, ret);
 371 }
 372
 373 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream)
 374 {
 375         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 376         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 377         struct snd_soc_dai *codec_dai;
 378         int i;
 379         unsigned int bits = 0, cpu_bits;
 380
 381         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 382                 for_each_rtd_codec_dai(rtd, i, codec_dai) {
 383                         if (codec_dai->driver->playback.sig_bits == 0) {
 384                                 bits = 0;
 385                                 break;
 386                         }
 387                         bits = max(codec_dai->driver->playback.sig_bits, bits);
 388                 }
 389                 cpu_bits = cpu_dai->driver->playback.sig_bits;
 390         } else {
 391                 for_each_rtd_codec_dai(rtd, i, codec_dai) {
 392                         if (codec_dai->driver->capture.sig_bits == 0) {
 393                                 bits = 0;
 394                                 break;
 395                         }
 396                         bits = max(codec_dai->driver->capture.sig_bits, bits);
 397                 }
 398                 cpu_bits = cpu_dai->driver->capture.sig_bits;
 399         }
 400
 401         soc_pcm_set_msb(substream, bits);
 402         soc_pcm_set_msb(substream, cpu_bits);
 403 }
 404
 405 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream)
 406 {
 407         struct snd_pcm_runtime *runtime = substream->runtime;
 408         struct snd_pcm_hardware *hw = &runtime->hw;
 409         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 410         struct snd_soc_dai *codec_dai;
 411         struct snd_soc_dai_driver *cpu_dai_drv = rtd->cpu_dai->driver;
 412         struct snd_soc_dai_driver *codec_dai_drv;
 413         struct snd_soc_pcm_stream *codec_stream;
 414         struct snd_soc_pcm_stream *cpu_stream;
 415         unsigned int chan_min = 0, chan_max = UINT_MAX;
 416         unsigned int rate_min = 0, rate_max = UINT_MAX;
 417         unsigned int rates = UINT_MAX;
 418         u64 formats = ULLONG_MAX;
 419         int i;
 420
 421         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 422                 cpu_stream = &cpu_dai_drv->playback;
 423         else
 424                 cpu_stream = &cpu_dai_drv->capture;
 425
 426         /* first calculate min/max only for CODECs in the DAI link */
 427         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 428
 429                 /*
 430                  * Skip CODECs which don't support the current stream type.
 431                  * Otherwise, since the rate, channel, and format values will
 432                  * zero in that case, we would have no usable settings left,
 433                  * causing the resulting setup to fail.
 434                  * At least one CODEC should match, otherwise we should have
 435                  * bailed out on a higher level, since there would be no
 436                  * CODEC to support the transfer direction in that case.
 437                  */
 438                 if (!snd_soc_dai_stream_valid(codec_dai,
 439                                               substream->stream))
 440                         continue;
 441
 442                 codec_dai_drv = codec_dai->driver;
 443                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 444                         codec_stream = &codec_dai_drv->playback;
 445                 else
 446                         codec_stream = &codec_dai_drv->capture;
 447                 chan_min = max(chan_min, codec_stream->channels_min);
 448                 chan_max = min(chan_max, codec_stream->channels_max);
 449                 rate_min = max(rate_min, codec_stream->rate_min);
 450                 rate_max = min_not_zero(rate_max, codec_stream->rate_max);
 451                 formats &= codec_stream->formats;
 452                 rates = snd_pcm_rate_mask_intersect(codec_stream->rates, rates);
 453         }
 454
 455         /*
 456          * chan min/max cannot be enforced if there are multiple CODEC DAIs
 457          * connected to a single CPU DAI, use CPU DAI's directly and let
 458          * channel allocation be fixed up later
 459          */
 460         if (rtd->num_codecs > 1) {
 461                 chan_min = cpu_stream->channels_min;
 462                 chan_max = cpu_stream->channels_max;
 463         }
 464
 465         hw->channels_min = max(chan_min, cpu_stream->channels_min);
 466         hw->channels_max = min(chan_max, cpu_stream->channels_max);
 467         if (hw->formats)
 468                 hw->formats &= formats & cpu_stream->formats;
 469         else
 470                 hw->formats = formats & cpu_stream->formats;
 471         hw->rates = snd_pcm_rate_mask_intersect(rates, cpu_stream->rates);
 472
 473         snd_pcm_limit_hw_rates(runtime);
 474
 475         hw->rate_min = max(hw->rate_min, cpu_stream->rate_min);
 476         hw->rate_min = max(hw->rate_min, rate_min);
 477         hw->rate_max = min_not_zero(hw->rate_max, cpu_stream->rate_max);
 478         hw->rate_max = min_not_zero(hw->rate_max, rate_max);
 479 }
 480
 481 static int soc_pcm_components_open(struct snd_pcm_substream *substream,
 482                                    struct snd_soc_component **last)
 483 {
 484         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 485         struct snd_soc_component *component;
 486         int i, ret = 0;
 487
 488         for_each_rtd_components(rtd, i, component) {
 489                 *last = component;
 490
 491                 ret = snd_soc_component_module_get_when_open(component);
 492                 if (ret < 0) {
 493                         dev_err(component->dev,
 494                                 "ASoC: can't get module %s\n",
 495                                 component->name);
 496                         return ret;
 497                 }
 498
 499                 ret = snd_soc_component_open(component, substream);
 500                 if (ret < 0) {
 501                         dev_err(component->dev,
 502                                 "ASoC: can't open component %s: %d\n",
 503                                 component->name, ret);
 504                         return ret;
 505                 }
 506         }
 507         *last = NULL;
 508         return 0;
 509 }
 510
 511 static int soc_pcm_components_close(struct snd_pcm_substream *substream,
 512                                     struct snd_soc_component *last)
 513 {
 514         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 515         struct snd_soc_component *component;
 516         int i, ret = 0;
 517
 518         for_each_rtd_components(rtd, i, component) {
 519                 if (component == last)
 520                         break;
 521
 522                 ret |= snd_soc_component_close(component, substream);
 523                 snd_soc_component_module_put_when_close(component);
 524         }
 525
 526         return ret;
 527 }
 528
 529 /*
 530  * Called by ALSA when a PCM substream is opened, the runtime->hw record is
 531  * then initialized and any private data can be allocated. This also calls
 532  * startup for the cpu DAI, component, machine and codec DAI.
 533  */
 534 static int soc_pcm_open(struct snd_pcm_substream *substream)
 535 {
 536         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 537         struct snd_pcm_runtime *runtime = substream->runtime;
 538         struct snd_soc_component *component;
 539         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 540         struct snd_soc_dai *codec_dai;
 541         const char *codec_dai_name = "multicodec";
 542         int i, ret = 0;
 543
 544         for_each_rtd_components(rtd, i, component)
 545                 pinctrl_pm_select_default_state(component->dev);
 546
 547         for_each_rtd_components(rtd, i, component)
 548                 pm_runtime_get_sync(component->dev);
 549
 550         mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
 551
 552         /* startup the audio subsystem */
 553         ret = snd_soc_dai_startup(cpu_dai, substream);
 554         if (ret < 0) {
 555                 dev_err(cpu_dai->dev, "ASoC: can't open interface %s: %d\n",
 556                         cpu_dai->name, ret);
 557                 goto out;
 558         }
 559
 560         ret = soc_pcm_components_open(substream, &component);
 561         if (ret < 0)
 562                 goto component_err;
 563
 564         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 565                 ret = snd_soc_dai_startup(codec_dai, substream);
 566                 if (ret < 0) {
 567                         dev_err(codec_dai->dev,
 568                                 "ASoC: can't open codec %s: %d\n",
 569                                 codec_dai->name, ret);
 570                         goto codec_dai_err;
 571                 }
 572
 573                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 574                         codec_dai->tx_mask = 0;
 575                 else
 576                         codec_dai->rx_mask = 0;
 577         }
 578
 579         ret = soc_rtd_startup(rtd, substream);
 580         if (ret < 0) {
 581                 pr_err("ASoC: %s startup failed: %d\n",
 582                        rtd->dai_link->name, ret);
 583                 goto machine_err;
 584         }
 585
 586         /* Dynamic PCM DAI links compat checks use dynamic capabilities */
 587         if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
 588                 goto dynamic;
 589
 590         /* Check that the codec and cpu DAIs are compatible */
 591         soc_pcm_init_runtime_hw(substream);
 592
 593         if (rtd->num_codecs == 1)
 594                 codec_dai_name = rtd->codec_dai->name;
 595
 596         if (soc_pcm_has_symmetry(substream))
 597                 runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
 598
 599         ret = -EINVAL;
 600         if (!runtime->hw.rates) {
 601                 printk(KERN_ERR "ASoC: %s <-> %s No matching rates\n",
 602                         codec_dai_name, cpu_dai->name);
 603                 goto config_err;
 604         }
 605         if (!runtime->hw.formats) {
 606                 printk(KERN_ERR "ASoC: %s <-> %s No matching formats\n",
 607                         codec_dai_name, cpu_dai->name);
 608                 goto config_err;
 609         }
 610         if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
 611             runtime->hw.channels_min > runtime->hw.channels_max) {
 612                 printk(KERN_ERR "ASoC: %s <-> %s No matching channels\n",
 613                                 codec_dai_name, cpu_dai->name);
 614                 goto config_err;
 615         }
 616
 617         soc_pcm_apply_msb(substream);
 618
 619         /* Symmetry only applies if we've already got an active stream. */
 620         if (cpu_dai->active) {
 621                 ret = soc_pcm_apply_symmetry(substream, cpu_dai);
 622                 if (ret != 0)
 623                         goto config_err;
 624         }
 625
 626         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 627                 if (codec_dai->active) {
 628                         ret = soc_pcm_apply_symmetry(substream, codec_dai);
 629                         if (ret != 0)
 630                                 goto config_err;
 631                 }
 632         }
 633
 634         pr_debug("ASoC: %s <-> %s info:\n",
 635                         codec_dai_name, cpu_dai->name);
 636         pr_debug("ASoC: rate mask 0x%x\n", runtime->hw.rates);
 637         pr_debug("ASoC: min ch %d max ch %d\n", runtime->hw.channels_min,
 638                  runtime->hw.channels_max);
 639         pr_debug("ASoC: min rate %d max rate %d\n", runtime->hw.rate_min,
 640                  runtime->hw.rate_max);
 641
 642 dynamic:
 643
 644         snd_soc_runtime_activate(rtd, substream->stream);
 645
 646         mutex_unlock(&rtd->card->pcm_mutex);
 647         return 0;
 648
 649 config_err:
 650         soc_rtd_shutdown(rtd, substream);
 651
 652 machine_err:
 653         i = rtd->num_codecs;
 654
 655 codec_dai_err:
 656         for_each_rtd_codec_dai_rollback(rtd, i, codec_dai)
 657                 snd_soc_dai_shutdown(codec_dai, substream);
 658
 659 component_err:
 660         soc_pcm_components_close(substream, component);
 661
 662         snd_soc_dai_shutdown(cpu_dai, substream);
 663 out:
 664         mutex_unlock(&rtd->card->pcm_mutex);
 665
 666         for_each_rtd_components(rtd, i, component) {
 667                 pm_runtime_mark_last_busy(component->dev);
 668                 pm_runtime_put_autosuspend(component->dev);
 669         }
 670
 671         for_each_rtd_components(rtd, i, component)
 672                 if (!component->active)
 673                         pinctrl_pm_select_sleep_state(component->dev);
 674
 675         return ret;
 676 }
 677
 678 static void codec2codec_close_delayed_work(struct snd_soc_pcm_runtime *rtd)
 679 {
 680         /*
 681          * Currently nothing to do for c2c links
 682          * Since c2c links are internal nodes in the DAPM graph and
 683          * don't interface with the outside world or application layer
 684          * we don't have to do any special handling on close.
 685          */
 686 }
 687
 688 /*
 689  * Called by ALSA when a PCM substream is closed. Private data can be
 690  * freed here. The cpu DAI, codec DAI, machine and components are also
 691  * shutdown.
 692  */
 693 static int soc_pcm_close(struct snd_pcm_substream *substream)
 694 {
 695         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 696         struct snd_soc_component *component;
 697         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 698         struct snd_soc_dai *codec_dai;
 699         int i;
 700
 701         mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
 702
 703         snd_soc_runtime_deactivate(rtd, substream->stream);
 704
 705         /* clear the corresponding DAIs rate when inactive */
 706         if (!cpu_dai->active)
 707                 cpu_dai->rate = 0;
 708
 709         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 710                 if (!codec_dai->active)
 711                         codec_dai->rate = 0;
 712         }
 713
 714         snd_soc_dai_digital_mute(cpu_dai, 1, substream->stream);
 715
 716         snd_soc_dai_shutdown(cpu_dai, substream);
 717
 718         for_each_rtd_codec_dai(rtd, i, codec_dai)
 719                 snd_soc_dai_shutdown(codec_dai, substream);
 720
 721         soc_rtd_shutdown(rtd, substream);
 722
 723         soc_pcm_components_close(substream, NULL);
 724
 725         snd_soc_dapm_stream_stop(rtd, substream->stream);
 726
 727         mutex_unlock(&rtd->card->pcm_mutex);
 728
 729         for_each_rtd_components(rtd, i, component) {
 730                 pm_runtime_mark_last_busy(component->dev);
 731                 pm_runtime_put_autosuspend(component->dev);
 732         }
 733
 734         for_each_rtd_components(rtd, i, component)
 735                 if (!component->active)
 736                         pinctrl_pm_select_sleep_state(component->dev);
 737
 738         return 0;
 739 }
 740
 741 /*
 742  * Called by ALSA when the PCM substream is prepared, can set format, sample
 743  * rate, etc.  This function is non atomic and can be called multiple times,
 744  * it can refer to the runtime info.
 745  */
 746 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
 747 {
 748         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 749         struct snd_soc_component *component;
 750         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 751         struct snd_soc_dai *codec_dai;
 752         int i, ret = 0;
 753
 754         mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
 755
 756         ret = soc_rtd_prepare(rtd, substream);
 757         if (ret < 0) {
 758                 dev_err(rtd->card->dev,
 759                         "ASoC: machine prepare error: %d\n", ret);
 760                 goto out;
 761         }
 762
 763         for_each_rtd_components(rtd, i, component) {
 764                 ret = snd_soc_component_prepare(component, substream);
 765                 if (ret < 0) {
 766                         dev_err(component->dev,
 767                                 "ASoC: platform prepare error: %d\n", ret);
 768                         goto out;
 769                 }
 770         }
 771
 772         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 773                 ret = snd_soc_dai_prepare(codec_dai, substream);
 774                 if (ret < 0) {
 775                         dev_err(codec_dai->dev,
 776                                 "ASoC: codec DAI prepare error: %d\n",
 777                                 ret);
 778                         goto out;
 779                 }
 780         }
 781
 782         ret = snd_soc_dai_prepare(cpu_dai, substream);
 783         if (ret < 0) {
 784                 dev_err(cpu_dai->dev,
 785                         "ASoC: cpu DAI prepare error: %d\n", ret);
 786                 goto out;
 787         }
 788
 789         /* cancel any delayed stream shutdown that is pending */
 790         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 791             rtd->pop_wait) {
 792                 rtd->pop_wait = 0;
 793                 cancel_delayed_work(&rtd->delayed_work);
 794         }
 795
 796         snd_soc_dapm_stream_event(rtd, substream->stream,
 797                         SND_SOC_DAPM_STREAM_START);
 798
 799         for_each_rtd_codec_dai(rtd, i, codec_dai)
 800                 snd_soc_dai_digital_mute(codec_dai, 0,
 801                                          substream->stream);
 802         snd_soc_dai_digital_mute(cpu_dai, 0, substream->stream);
 803
 804 out:
 805         mutex_unlock(&rtd->card->pcm_mutex);
 806         return ret;
 807 }
 808
 809 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params,
 810                                        unsigned int mask)
 811 {
 812         struct snd_interval *interval;
 813         int channels = hweight_long(mask);
 814
 815         interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
 816         interval->min = channels;
 817         interval->max = channels;
 818 }
 819
 820 static int soc_pcm_components_hw_free(struct snd_pcm_substream *substream,
 821                                       struct snd_soc_component *last)
 822 {
 823         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 824         struct snd_soc_component *component;
 825         int i, ret = 0;
 826
 827         for_each_rtd_components(rtd, i, component) {
 828                 if (component == last)
 829                         break;
 830
 831                 ret |= snd_soc_component_hw_free(component, substream);
 832         }
 833
 834         return ret;
 835 }
 836
 837 /*
 838  * Called by ALSA when the hardware params are set by application. This
 839  * function can also be called multiple times and can allocate buffers
 840  * (using snd_pcm_lib_* ). It's non-atomic.
 841  */
 842 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
 843                                 struct snd_pcm_hw_params *params)
 844 {
 845         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 846         struct snd_soc_component *component;
 847         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 848         struct snd_soc_dai *codec_dai;
 849         int i, ret = 0;
 850
 851         mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
 852
 853         ret = soc_pcm_params_symmetry(substream, params);
 854         if (ret)
 855                 goto out;
 856
 857         ret = soc_rtd_hw_params(rtd, substream, params);
 858         if (ret < 0) {
 859                 dev_err(rtd->card->dev,
 860                         "ASoC: machine hw_params failed: %d\n", ret);
 861                 goto out;
 862         }
 863
 864         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 865                 struct snd_pcm_hw_params codec_params;
 866
 867                 /*
 868                  * Skip CODECs which don't support the current stream type,
 869                  * the idea being that if a CODEC is not used for the currently
 870                  * set up transfer direction, it should not need to be
 871                  * configured, especially since the configuration used might
 872                  * not even be supported by that CODEC. There may be cases
 873                  * however where a CODEC needs to be set up although it is
 874                  * actually not being used for the transfer, e.g. if a
 875                  * capture-only CODEC is acting as an LRCLK and/or BCLK master
 876                  * for the DAI link including a playback-only CODEC.
 877                  * If this becomes necessary, we will have to augment the
 878                  * machine driver setup with information on how to act, so
 879                  * we can do the right thing here.
 880                  */
 881                 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
 882                         continue;
 883
 884                 /* copy params for each codec */
 885                 codec_params = *params;
 886
 887                 /* fixup params based on TDM slot masks */
 888                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 889                     codec_dai->tx_mask)
 890                         soc_pcm_codec_params_fixup(&codec_params,
 891                                                    codec_dai->tx_mask);
 892
 893                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE &&
 894                     codec_dai->rx_mask)
 895                         soc_pcm_codec_params_fixup(&codec_params,
 896                                                    codec_dai->rx_mask);
 897
 898                 ret = snd_soc_dai_hw_params(codec_dai, substream,
 899                                             &codec_params);
 900                 if(ret < 0)
 901                         goto codec_err;
 902
 903                 codec_dai->rate = params_rate(&codec_params);
 904                 codec_dai->channels = params_channels(&codec_params);
 905                 codec_dai->sample_bits = snd_pcm_format_physical_width(
 906                                                 params_format(&codec_params));
 907
 908                 snd_soc_dapm_update_dai(substream, &codec_params, codec_dai);
 909         }
 910
 911         ret = snd_soc_dai_hw_params(cpu_dai, substream, params);
 912         if (ret < 0)
 913                 goto interface_err;
 914
 915         /* store the parameters for each DAIs */
 916         cpu_dai->rate = params_rate(params);
 917         cpu_dai->channels = params_channels(params);
 918         cpu_dai->sample_bits =
 919                 snd_pcm_format_physical_width(params_format(params));
 920
 921         snd_soc_dapm_update_dai(substream, params, cpu_dai);
 922
 923         for_each_rtd_components(rtd, i, component) {
 924                 ret = snd_soc_component_hw_params(component, substream, params);
 925                 if (ret < 0) {
 926                         dev_err(component->dev,
 927                                 "ASoC: %s hw params failed: %d\n",
 928                                 component->name, ret);
 929                         goto component_err;
 930                 }
 931         }
 932         component = NULL;
 933
 934 out:
 935         mutex_unlock(&rtd->card->pcm_mutex);
 936         return ret;
 937
 938 component_err:
 939         soc_pcm_components_hw_free(substream, component);
 940
 941         snd_soc_dai_hw_free(cpu_dai, substream);
 942         cpu_dai->rate = 0;
 943
 944 interface_err:
 945         i = rtd->num_codecs;
 946
 947 codec_err:
 948         for_each_rtd_codec_dai_rollback(rtd, i, codec_dai) {
 949                 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
 950                         continue;
 951
 952                 snd_soc_dai_hw_free(codec_dai, substream);
 953                 codec_dai->rate = 0;
 954         }
 955
 956         soc_rtd_hw_free(rtd, substream);
 957
 958         mutex_unlock(&rtd->card->pcm_mutex);
 959         return ret;
 960 }
 961
 962 /*
 963  * Frees resources allocated by hw_params, can be called multiple times
 964  */
 965 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
 966 {
 967         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 968         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 969         struct snd_soc_dai *codec_dai;
 970         bool playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
 971         int i;
 972
 973         mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
 974
 975         /* clear the corresponding DAIs parameters when going to be inactive */
 976         if (cpu_dai->active == 1) {
 977                 cpu_dai->rate = 0;
 978                 cpu_dai->channels = 0;
 979                 cpu_dai->sample_bits = 0;
 980         }
 981
 982         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 983                 if (codec_dai->active == 1) {
 984                         codec_dai->rate = 0;
 985                         codec_dai->channels = 0;
 986                         codec_dai->sample_bits = 0;
 987                 }
 988         }
 989
 990         /* apply codec digital mute */
 991         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 992                 if ((playback && codec_dai->playback_active == 1) ||
 993                     (!playback && codec_dai->capture_active == 1))
 994                         snd_soc_dai_digital_mute(codec_dai, 1,
 995                                                  substream->stream);
 996         }
 997
 998         /* free any machine hw params */
 999         soc_rtd_hw_free(rtd, substream);
1000
1001         /* free any component resources */
1002         soc_pcm_components_hw_free(substream, NULL);
1003
1004         /* now free hw params for the DAIs  */
1005         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1006                 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
1007                         continue;
1008
1009                 snd_soc_dai_hw_free(codec_dai, substream);
1010         }
1011
1012         snd_soc_dai_hw_free(cpu_dai, substream);
1013
1014         mutex_unlock(&rtd->card->pcm_mutex);
1015         return 0;
1016 }
1017
1018 static int soc_pcm_trigger_start(struct snd_pcm_substream *substream, int cmd)
1019 {
1020         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1021         struct snd_soc_component *component;
1022         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1023         struct snd_soc_dai *codec_dai;
1024         int i, ret;
1025
1026         ret = soc_rtd_trigger(rtd, substream, cmd);
1027         if (ret < 0)
1028                 return ret;
1029
1030         for_each_rtd_components(rtd, i, component) {
1031                 ret = snd_soc_component_trigger(component, substream, cmd);
1032                 if (ret < 0)
1033                         return ret;
1034         }
1035
1036         ret = snd_soc_dai_trigger(cpu_dai, substream, cmd);
1037         if (ret < 0)
1038                 return ret;
1039
1040         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1041                 ret = snd_soc_dai_trigger(codec_dai, substream, cmd);
1042                 if (ret < 0)
1043                         return ret;
1044         }
1045
1046         return 0;
1047 }
1048
1049 static int soc_pcm_trigger_stop(struct snd_pcm_substream *substream, int cmd)
1050 {
1051         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1052         struct snd_soc_component *component;
1053         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1054         struct snd_soc_dai *codec_dai;
1055         int i, ret;
1056
1057         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1058                 ret = snd_soc_dai_trigger(codec_dai, substream, cmd);
1059                 if (ret < 0)
1060                         return ret;
1061         }
1062
1063         ret = snd_soc_dai_trigger(cpu_dai, substream, cmd);
1064         if (ret < 0)
1065                 return ret;
1066
1067         for_each_rtd_components(rtd, i, component) {
1068                 ret = snd_soc_component_trigger(component, substream, cmd);
1069                 if (ret < 0)
1070                         return ret;
1071         }
1072
1073         ret = soc_rtd_trigger(rtd, substream, cmd);
1074         if (ret < 0)
1075                 return ret;
1076
1077         return 0;
1078 }
1079
1080 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
1081 {
1082         int ret;
1083
1084         switch (cmd) {
1085         case SNDRV_PCM_TRIGGER_START:
1086         case SNDRV_PCM_TRIGGER_RESUME:
1087         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1088                 ret = soc_pcm_trigger_start(substream, cmd);
1089                 break;
1090         case SNDRV_PCM_TRIGGER_STOP:
1091         case SNDRV_PCM_TRIGGER_SUSPEND:
1092         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1093                 ret = soc_pcm_trigger_stop(substream, cmd);
1094                 break;
1095         default:
1096                 return -EINVAL;
1097         }
1098
1099         return ret;
1100 }
1101
1102 static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
1103                                    int cmd)
1104 {
1105         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1106         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1107         struct snd_soc_dai *codec_dai;
1108         int i, ret;
1109
1110         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1111                 ret = snd_soc_dai_bespoke_trigger(codec_dai, substream, cmd);
1112                 if (ret < 0)
1113                         return ret;
1114         }
1115
1116         ret = snd_soc_dai_bespoke_trigger(cpu_dai, substream, cmd);
1117         if (ret < 0)
1118                 return ret;
1119
1120         return 0;
1121 }
1122 /*
1123  * soc level wrapper for pointer callback
1124  * If cpu_dai, codec_dai, component driver has the delay callback, then
1125  * the runtime->delay will be updated accordingly.
1126  */
1127 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1128 {
1129         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1130         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1131         struct snd_soc_dai *codec_dai;
1132         struct snd_pcm_runtime *runtime = substream->runtime;
1133         snd_pcm_uframes_t offset = 0;
1134         snd_pcm_sframes_t delay = 0;
1135         snd_pcm_sframes_t codec_delay = 0;
1136         int i;
1137
1138         /* clearing the previous total delay */
1139         runtime->delay = 0;
1140
1141         offset = snd_soc_pcm_component_pointer(substream);
1142
1143         /* base delay if assigned in pointer callback */
1144         delay = runtime->delay;
1145
1146         delay += snd_soc_dai_delay(cpu_dai, substream);
1147
1148         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1149                 codec_delay = max(codec_delay,
1150                                   snd_soc_dai_delay(codec_dai, substream));
1151         }
1152         delay += codec_delay;
1153
1154         runtime->delay = delay;
1155
1156         return offset;
1157 }
1158
1159 /* connect a FE and BE */
1160 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1161                 struct snd_soc_pcm_runtime *be, int stream)
1162 {
1163         struct snd_soc_dpcm *dpcm;
1164         unsigned long flags;
1165 #ifdef CONFIG_DEBUG_FS
1166         char *name;
1167 #endif
1168
1169         /* only add new dpcms */
1170         for_each_dpcm_be(fe, stream, dpcm) {
1171                 if (dpcm->be == be && dpcm->fe == fe)
1172                         return 0;
1173         }
1174
1175         dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1176         if (!dpcm)
1177                 return -ENOMEM;
1178
1179         dpcm->be = be;
1180         dpcm->fe = fe;
1181         be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
1182         dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1183         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1184         list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1185         list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1186         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1187
1188         dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1189                         stream ? "capture" : "playback",  fe->dai_link->name,
1190                         stream ? "<-" : "->", be->dai_link->name);
1191
1192 #ifdef CONFIG_DEBUG_FS
1193         name = kasprintf(GFP_KERNEL, "%s:%s", be->dai_link->name,
1194                          stream ? "capture" : "playback");
1195         if (name) {
1196                 dpcm->debugfs_state = debugfs_create_dir(name,
1197                                                          fe->debugfs_dpcm_root);
1198                 debugfs_create_u32("state", 0644, dpcm->debugfs_state,
1199                                    &dpcm->state);
1200                 kfree(name);
1201         }
1202 #endif
1203         return 1;
1204 }
1205
1206 /* reparent a BE onto another FE */
1207 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1208                         struct snd_soc_pcm_runtime *be, int stream)
1209 {
1210         struct snd_soc_dpcm *dpcm;
1211         struct snd_pcm_substream *fe_substream, *be_substream;
1212
1213         /* reparent if BE is connected to other FEs */
1214         if (!be->dpcm[stream].users)
1215                 return;
1216
1217         be_substream = snd_soc_dpcm_get_substream(be, stream);
1218
1219         for_each_dpcm_fe(be, stream, dpcm) {
1220                 if (dpcm->fe == fe)
1221                         continue;
1222
1223                 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1224                         stream ? "capture" : "playback",
1225                         dpcm->fe->dai_link->name,
1226                         stream ? "<-" : "->", dpcm->be->dai_link->name);
1227
1228                 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1229                 be_substream->runtime = fe_substream->runtime;
1230                 break;
1231         }
1232 }
1233
1234 /* disconnect a BE and FE */
1235 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1236 {
1237         struct snd_soc_dpcm *dpcm, *d;
1238         unsigned long flags;
1239
1240         for_each_dpcm_be_safe(fe, stream, dpcm, d) {
1241                 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1242                                 stream ? "capture" : "playback",
1243                                 dpcm->be->dai_link->name);
1244
1245                 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1246                         continue;
1247
1248                 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1249                         stream ? "capture" : "playback", fe->dai_link->name,
1250                         stream ? "<-" : "->", dpcm->be->dai_link->name);
1251
1252                 /* BEs still alive need new FE */
1253                 dpcm_be_reparent(fe, dpcm->be, stream);
1254
1255 #ifdef CONFIG_DEBUG_FS
1256                 debugfs_remove_recursive(dpcm->debugfs_state);
1257 #endif
1258                 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1259                 list_del(&dpcm->list_be);
1260                 list_del(&dpcm->list_fe);
1261                 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1262                 kfree(dpcm);
1263         }
1264 }
1265
1266 /* get BE for DAI widget and stream */
1267 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1268                 struct snd_soc_dapm_widget *widget, int stream)
1269 {
1270         struct snd_soc_pcm_runtime *be;
1271         struct snd_soc_dai *dai;
1272         int i;
1273
1274         dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name);
1275
1276         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1277                 for_each_card_rtds(card, be) {
1278
1279                         if (!be->dai_link->no_pcm)
1280                                 continue;
1281
1282                         dev_dbg(card->dev, "ASoC: try BE : %s\n",
1283                                 be->cpu_dai->playback_widget ?
1284                                 be->cpu_dai->playback_widget->name : "(not set)");
1285
1286                         if (be->cpu_dai->playback_widget == widget)
1287                                 return be;
1288
1289                         for_each_rtd_codec_dai(be, i, dai) {
1290                                 if (dai->playback_widget == widget)
1291                                         return be;
1292                         }
1293                 }
1294         } else {
1295
1296                 for_each_card_rtds(card, be) {
1297
1298                         if (!be->dai_link->no_pcm)
1299                                 continue;
1300
1301                         dev_dbg(card->dev, "ASoC: try BE %s\n",
1302                                 be->cpu_dai->capture_widget ?
1303                                 be->cpu_dai->capture_widget->name : "(not set)");
1304
1305                         if (be->cpu_dai->capture_widget == widget)
1306                                 return be;
1307
1308                         for_each_rtd_codec_dai(be, i, dai) {
1309                                 if (dai->capture_widget == widget)
1310                                         return be;
1311                         }
1312                 }
1313         }
1314
1315         /* dai link name and stream name set correctly ? */
1316         dev_err(card->dev, "ASoC: can't get %s BE for %s\n",
1317                 stream ? "capture" : "playback", widget->name);
1318         return NULL;
1319 }
1320
1321 static inline struct snd_soc_dapm_widget *
1322         dai_get_widget(struct snd_soc_dai *dai, int stream)
1323 {
1324         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1325                 return dai->playback_widget;
1326         else
1327                 return dai->capture_widget;
1328 }
1329
1330 static int widget_in_list(struct snd_soc_dapm_widget_list *list,
1331                 struct snd_soc_dapm_widget *widget)
1332 {
1333         int i;
1334
1335         for (i = 0; i < list->num_widgets; i++) {
1336                 if (widget == list->widgets[i])
1337                         return 1;
1338         }
1339
1340         return 0;
1341 }
1342
1343 static bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget,
1344                 enum snd_soc_dapm_direction dir)
1345 {
1346         struct snd_soc_card *card = widget->dapm->card;
1347         struct snd_soc_pcm_runtime *rtd;
1348         struct snd_soc_dai *dai;
1349         int i;
1350
1351         if (dir == SND_SOC_DAPM_DIR_OUT) {
1352                 for_each_card_rtds(card, rtd) {
1353                         if (!rtd->dai_link->no_pcm)
1354                                 continue;
1355
1356                         if (rtd->cpu_dai->playback_widget == widget)
1357                                 return true;
1358
1359                         for_each_rtd_codec_dai(rtd, i, dai) {
1360                                 if (dai->playback_widget == widget)
1361                                         return true;
1362                         }
1363                 }
1364         } else { /* SND_SOC_DAPM_DIR_IN */
1365                 for_each_card_rtds(card, rtd) {
1366                         if (!rtd->dai_link->no_pcm)
1367                                 continue;
1368
1369                         if (rtd->cpu_dai->capture_widget == widget)
1370                                 return true;
1371
1372                         for_each_rtd_codec_dai(rtd, i, dai) {
1373                                 if (dai->capture_widget == widget)
1374                                         return true;
1375                         }
1376                 }
1377         }
1378
1379         return false;
1380 }
1381
1382 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1383         int stream, struct snd_soc_dapm_widget_list **list)
1384 {
1385         struct snd_soc_dai *cpu_dai = fe->cpu_dai;
1386         int paths;
1387
1388         /* get number of valid DAI paths and their widgets */
1389         paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
1390                         dpcm_end_walk_at_be);
1391
1392         dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1393                         stream ? "capture" : "playback");
1394
1395         return paths;
1396 }
1397
1398 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1399         struct snd_soc_dapm_widget_list **list_)
1400 {
1401         struct snd_soc_dpcm *dpcm;
1402         struct snd_soc_dapm_widget_list *list = *list_;
1403         struct snd_soc_dapm_widget *widget;
1404         struct snd_soc_dai *dai;
1405         int prune = 0;
1406         int do_prune;
1407
1408         /* Destroy any old FE <--> BE connections */
1409         for_each_dpcm_be(fe, stream, dpcm) {
1410                 unsigned int i;
1411
1412                 /* is there a valid CPU DAI widget for this BE */
1413                 widget = dai_get_widget(dpcm->be->cpu_dai, stream);
1414
1415                 /* prune the BE if it's no longer in our active list */
1416                 if (widget && widget_in_list(list, widget))
1417                         continue;
1418
1419                 /* is there a valid CODEC DAI widget for this BE */
1420                 do_prune = 1;
1421                 for_each_rtd_codec_dai(dpcm->be, i, dai) {
1422                         widget = dai_get_widget(dai, stream);
1423
1424                         /* prune the BE if it's no longer in our active list */
1425                         if (widget && widget_in_list(list, widget))
1426                                 do_prune = 0;
1427                 }
1428                 if (!do_prune)
1429                         continue;
1430
1431                 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1432                         stream ? "capture" : "playback",
1433                         dpcm->be->dai_link->name, fe->dai_link->name);
1434                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1435                 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1436                 prune++;
1437         }
1438
1439         dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1440         return prune;
1441 }
1442
1443 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1444         struct snd_soc_dapm_widget_list **list_)
1445 {
1446         struct snd_soc_card *card = fe->card;
1447         struct snd_soc_dapm_widget_list *list = *list_;
1448         struct snd_soc_pcm_runtime *be;
1449         int i, new = 0, err;
1450
1451         /* Create any new FE <--> BE connections */
1452         for (i = 0; i < list->num_widgets; i++) {
1453
1454                 switch (list->widgets[i]->id) {
1455                 case snd_soc_dapm_dai_in:
1456                         if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1457                                 continue;
1458                         break;
1459                 case snd_soc_dapm_dai_out:
1460                         if (stream != SNDRV_PCM_STREAM_CAPTURE)
1461                                 continue;
1462                         break;
1463                 default:
1464                         continue;
1465                 }
1466
1467                 /* is there a valid BE rtd for this widget */
1468                 be = dpcm_get_be(card, list->widgets[i], stream);
1469                 if (!be) {
1470                         dev_err(fe->dev, "ASoC: no BE found for %s\n",
1471                                         list->widgets[i]->name);
1472                         continue;
1473                 }
1474
1475                 /* make sure BE is a real BE */
1476                 if (!be->dai_link->no_pcm)
1477                         continue;
1478
1479                 /* don't connect if FE is not running */
1480                 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
1481                         continue;
1482
1483                 /* newly connected FE and BE */
1484                 err = dpcm_be_connect(fe, be, stream);
1485                 if (err < 0) {
1486                         dev_err(fe->dev, "ASoC: can't connect %s\n",
1487                                 list->widgets[i]->name);
1488                         break;
1489                 } else if (err == 0) /* already connected */
1490                         continue;
1491
1492                 /* new */
1493                 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1494                 new++;
1495         }
1496
1497         dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1498         return new;
1499 }
1500
1501 /*
1502  * Find the corresponding BE DAIs that source or sink audio to this
1503  * FE substream.
1504  */
1505 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1506         int stream, struct snd_soc_dapm_widget_list **list, int new)
1507 {
1508         if (new)
1509                 return dpcm_add_paths(fe, stream, list);
1510         else
1511                 return dpcm_prune_paths(fe, stream, list);
1512 }
1513
1514 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1515 {
1516         struct snd_soc_dpcm *dpcm;
1517         unsigned long flags;
1518
1519         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1520         for_each_dpcm_be(fe, stream, dpcm)
1521                 dpcm->be->dpcm[stream].runtime_update =
1522                                                 SND_SOC_DPCM_UPDATE_NO;
1523         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1524 }
1525
1526 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
1527         int stream)
1528 {
1529         struct snd_soc_dpcm *dpcm;
1530
1531         /* disable any enabled and non active backends */
1532         for_each_dpcm_be(fe, stream, dpcm) {
1533
1534                 struct snd_soc_pcm_runtime *be = dpcm->be;
1535                 struct snd_pcm_substream *be_substream =
1536                         snd_soc_dpcm_get_substream(be, stream);
1537
1538                 if (be->dpcm[stream].users == 0)
1539                         dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1540                                 stream ? "capture" : "playback",
1541                                 be->dpcm[stream].state);
1542
1543                 if (--be->dpcm[stream].users != 0)
1544                         continue;
1545
1546                 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1547                         continue;
1548
1549                 soc_pcm_close(be_substream);
1550                 be_substream->runtime = NULL;
1551                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1552         }
1553 }
1554
1555 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1556 {
1557         struct snd_soc_dpcm *dpcm;
1558         int err, count = 0;
1559
1560         /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1561         for_each_dpcm_be(fe, stream, dpcm) {
1562
1563                 struct snd_soc_pcm_runtime *be = dpcm->be;
1564                 struct snd_pcm_substream *be_substream =
1565                         snd_soc_dpcm_get_substream(be, stream);
1566
1567                 if (!be_substream) {
1568                         dev_err(be->dev, "ASoC: no backend %s stream\n",
1569                                 stream ? "capture" : "playback");
1570                         continue;
1571                 }
1572
1573                 /* is this op for this BE ? */
1574                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1575                         continue;
1576
1577                 /* first time the dpcm is open ? */
1578                 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
1579                         dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1580                                 stream ? "capture" : "playback",
1581                                 be->dpcm[stream].state);
1582
1583                 if (be->dpcm[stream].users++ != 0)
1584                         continue;
1585
1586                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1587                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1588                         continue;
1589
1590                 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1591                         stream ? "capture" : "playback", be->dai_link->name);
1592
1593                 be_substream->runtime = be->dpcm[stream].runtime;
1594                 err = soc_pcm_open(be_substream);
1595                 if (err < 0) {
1596                         dev_err(be->dev, "ASoC: BE open failed %d\n", err);
1597                         be->dpcm[stream].users--;
1598                         if (be->dpcm[stream].users < 0)
1599                                 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1600                                         stream ? "capture" : "playback",
1601                                         be->dpcm[stream].state);
1602
1603                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1604                         goto unwind;
1605                 }
1606
1607                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1608                 count++;
1609         }
1610
1611         return count;
1612
1613 unwind:
1614         /* disable any enabled and non active backends */
1615         for_each_dpcm_be_rollback(fe, stream, dpcm) {
1616                 struct snd_soc_pcm_runtime *be = dpcm->be;
1617                 struct snd_pcm_substream *be_substream =
1618                         snd_soc_dpcm_get_substream(be, stream);
1619
1620                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1621                         continue;
1622
1623                 if (be->dpcm[stream].users == 0)
1624                         dev_err(be->dev, "ASoC: no users %s at close %d\n",
1625                                 stream ? "capture" : "playback",
1626                                 be->dpcm[stream].state);
1627
1628                 if (--be->dpcm[stream].users != 0)
1629                         continue;
1630
1631                 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1632                         continue;
1633
1634                 soc_pcm_close(be_substream);
1635                 be_substream->runtime = NULL;
1636                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1637         }
1638
1639         return err;
1640 }
1641
1642 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
1643                                  struct snd_soc_pcm_stream *stream)
1644 {
1645         runtime->hw.rate_min = stream->rate_min;
1646         runtime->hw.rate_max = min_not_zero(stream->rate_max, UINT_MAX);
1647         runtime->hw.channels_min = stream->channels_min;
1648         runtime->hw.channels_max = stream->channels_max;
1649         if (runtime->hw.formats)
1650                 runtime->hw.formats &= stream->formats;
1651         else
1652                 runtime->hw.formats = stream->formats;
1653         runtime->hw.rates = stream->rates;
1654 }
1655
1656 static void dpcm_runtime_merge_format(struct snd_pcm_substream *substream,
1657                                       u64 *formats)
1658 {
1659         struct snd_soc_pcm_runtime *fe = substream->private_data;
1660         struct snd_soc_dpcm *dpcm;
1661         struct snd_soc_dai *dai;
1662         int stream = substream->stream;
1663
1664         if (!fe->dai_link->dpcm_merged_format)
1665                 return;
1666
1667         /*
1668          * It returns merged BE codec format
1669          * if FE want to use it (= dpcm_merged_format)
1670          */
1671
1672         for_each_dpcm_be(fe, stream, dpcm) {
1673                 struct snd_soc_pcm_runtime *be = dpcm->be;
1674                 struct snd_soc_dai_driver *codec_dai_drv;
1675                 struct snd_soc_pcm_stream *codec_stream;
1676                 int i;
1677
1678                 for_each_rtd_codec_dai(be, i, dai) {
1679                         /*
1680                          * Skip CODECs which don't support the current stream
1681                          * type. See soc_pcm_init_runtime_hw() for more details
1682                          */
1683                         if (!snd_soc_dai_stream_valid(dai, stream))
1684                                 continue;
1685
1686                         codec_dai_drv = dai->driver;
1687                         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1688                                 codec_stream = &codec_dai_drv->playback;
1689                         else
1690                                 codec_stream = &codec_dai_drv->capture;
1691
1692                         *formats &= codec_stream->formats;
1693                 }
1694         }
1695 }
1696
1697 static void dpcm_runtime_merge_chan(struct snd_pcm_substream *substream,
1698                                     unsigned int *channels_min,
1699                                     unsigned int *channels_max)
1700 {
1701         struct snd_soc_pcm_runtime *fe = substream->private_data;
1702         struct snd_soc_dpcm *dpcm;
1703         int stream = substream->stream;
1704
1705         if (!fe->dai_link->dpcm_merged_chan)
1706                 return;
1707
1708         /*
1709          * It returns merged BE codec channel;
1710          * if FE want to use it (= dpcm_merged_chan)
1711          */
1712
1713         for_each_dpcm_be(fe, stream, dpcm) {
1714                 struct snd_soc_pcm_runtime *be = dpcm->be;
1715                 struct snd_soc_dai_driver *cpu_dai_drv =  be->cpu_dai->driver;
1716                 struct snd_soc_dai_driver *codec_dai_drv;
1717                 struct snd_soc_pcm_stream *codec_stream;
1718                 struct snd_soc_pcm_stream *cpu_stream;
1719
1720                 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1721                         cpu_stream = &cpu_dai_drv->playback;
1722                 else
1723                         cpu_stream = &cpu_dai_drv->capture;
1724
1725                 *channels_min = max(*channels_min, cpu_stream->channels_min);
1726                 *channels_max = min(*channels_max, cpu_stream->channels_max);
1727
1728                 /*
1729                  * chan min/max cannot be enforced if there are multiple CODEC
1730                  * DAIs connected to a single CPU DAI, use CPU DAI's directly
1731                  */
1732                 if (be->num_codecs == 1) {
1733                         codec_dai_drv = be->codec_dais[0]->driver;
1734
1735                         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1736                                 codec_stream = &codec_dai_drv->playback;
1737                         else
1738                                 codec_stream = &codec_dai_drv->capture;
1739
1740                         *channels_min = max(*channels_min,
1741                                             codec_stream->channels_min);
1742                         *channels_max = min(*channels_max,
1743                                             codec_stream->channels_max);
1744                 }
1745         }
1746 }
1747
1748 static void dpcm_runtime_merge_rate(struct snd_pcm_substream *substream,
1749                                     unsigned int *rates,
1750                                     unsigned int *rate_min,
1751                                     unsigned int *rate_max)
1752 {
1753         struct snd_soc_pcm_runtime *fe = substream->private_data;
1754         struct snd_soc_dpcm *dpcm;
1755         int stream = substream->stream;
1756
1757         if (!fe->dai_link->dpcm_merged_rate)
1758                 return;
1759
1760         /*
1761          * It returns merged BE codec channel;
1762          * if FE want to use it (= dpcm_merged_chan)
1763          */
1764
1765         for_each_dpcm_be(fe, stream, dpcm) {
1766                 struct snd_soc_pcm_runtime *be = dpcm->be;
1767                 struct snd_soc_dai_driver *cpu_dai_drv =  be->cpu_dai->driver;
1768                 struct snd_soc_dai_driver *codec_dai_drv;
1769                 struct snd_soc_pcm_stream *codec_stream;
1770                 struct snd_soc_pcm_stream *cpu_stream;
1771                 struct snd_soc_dai *dai;
1772                 int i;
1773
1774                 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1775                         cpu_stream = &cpu_dai_drv->playback;
1776                 else
1777                         cpu_stream = &cpu_dai_drv->capture;
1778
1779                 *rate_min = max(*rate_min, cpu_stream->rate_min);
1780                 *rate_max = min_not_zero(*rate_max, cpu_stream->rate_max);
1781                 *rates = snd_pcm_rate_mask_intersect(*rates, cpu_stream->rates);
1782
1783                 for_each_rtd_codec_dai(be, i, dai) {
1784                         /*
1785                          * Skip CODECs which don't support the current stream
1786                          * type. See soc_pcm_init_runtime_hw() for more details
1787                          */
1788                         if (!snd_soc_dai_stream_valid(dai, stream))
1789                                 continue;
1790
1791                         codec_dai_drv = dai->driver;
1792                         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1793                                 codec_stream = &codec_dai_drv->playback;
1794                         else
1795                                 codec_stream = &codec_dai_drv->capture;
1796
1797                         *rate_min = max(*rate_min, codec_stream->rate_min);
1798                         *rate_max = min_not_zero(*rate_max,
1799                                                  codec_stream->rate_max);
1800                         *rates = snd_pcm_rate_mask_intersect(*rates,
1801                                                 codec_stream->rates);
1802                 }
1803         }
1804 }
1805
1806 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
1807 {
1808         struct snd_pcm_runtime *runtime = substream->runtime;
1809         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1810         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1811         struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
1812
1813         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1814                 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback);
1815         else
1816                 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture);
1817
1818         dpcm_runtime_merge_format(substream, &runtime->hw.formats);
1819         dpcm_runtime_merge_chan(substream, &runtime->hw.channels_min,
1820                                 &runtime->hw.channels_max);
1821         dpcm_runtime_merge_rate(substream, &runtime->hw.rates,
1822                                 &runtime->hw.rate_min, &runtime->hw.rate_max);
1823 }
1824
1825 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
1826
1827 /* Set FE's runtime_update state; the state is protected via PCM stream lock
1828  * for avoiding the race with trigger callback.
1829  * If the state is unset and a trigger is pending while the previous operation,
1830  * process the pending trigger action here.
1831  */
1832 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
1833                                      int stream, enum snd_soc_dpcm_update state)
1834 {
1835         struct snd_pcm_substream *substream =
1836                 snd_soc_dpcm_get_substream(fe, stream);
1837
1838         snd_pcm_stream_lock_irq(substream);
1839         if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
1840                 dpcm_fe_dai_do_trigger(substream,
1841                                        fe->dpcm[stream].trigger_pending - 1);
1842                 fe->dpcm[stream].trigger_pending = 0;
1843         }
1844         fe->dpcm[stream].runtime_update = state;
1845         snd_pcm_stream_unlock_irq(substream);
1846 }
1847
1848 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
1849                                int stream)
1850 {
1851         struct snd_soc_dpcm *dpcm;
1852         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1853         struct snd_soc_dai *fe_cpu_dai = fe->cpu_dai;
1854         int err;
1855
1856         /* apply symmetry for FE */
1857         if (soc_pcm_has_symmetry(fe_substream))
1858                 fe_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1859
1860         /* Symmetry only applies if we've got an active stream. */
1861         if (fe_cpu_dai->active) {
1862                 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
1863                 if (err < 0)
1864                         return err;
1865         }
1866
1867         /* apply symmetry for BE */
1868         for_each_dpcm_be(fe, stream, dpcm) {
1869                 struct snd_soc_pcm_runtime *be = dpcm->be;
1870                 struct snd_pcm_substream *be_substream =
1871                         snd_soc_dpcm_get_substream(be, stream);
1872                 struct snd_soc_pcm_runtime *rtd;
1873                 struct snd_soc_dai *codec_dai;
1874                 int i;
1875
1876                 /* A backend may not have the requested substream */
1877                 if (!be_substream)
1878                         continue;
1879
1880                 rtd = be_substream->private_data;
1881                 if (rtd->dai_link->be_hw_params_fixup)
1882                         continue;
1883
1884                 if (soc_pcm_has_symmetry(be_substream))
1885                         be_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1886
1887                 /* Symmetry only applies if we've got an active stream. */
1888                 if (rtd->cpu_dai->active) {
1889                         err = soc_pcm_apply_symmetry(fe_substream,
1890                                                      rtd->cpu_dai);
1891                         if (err < 0)
1892                                 return err;
1893                 }
1894
1895                 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1896                         if (codec_dai->active) {
1897                                 err = soc_pcm_apply_symmetry(fe_substream,
1898                                                              codec_dai);
1899                                 if (err < 0)
1900                                         return err;
1901                         }
1902                 }
1903         }
1904
1905         return 0;
1906 }
1907
1908 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1909 {
1910         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1911         struct snd_pcm_runtime *runtime = fe_substream->runtime;
1912         int stream = fe_substream->stream, ret = 0;
1913
1914         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1915
1916         ret = dpcm_be_dai_startup(fe, fe_substream->stream);
1917         if (ret < 0) {
1918                 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
1919                 goto be_err;
1920         }
1921
1922         dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1923
1924         /* start the DAI frontend */
1925         ret = soc_pcm_open(fe_substream);
1926         if (ret < 0) {
1927                 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
1928                 goto unwind;
1929         }
1930
1931         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1932
1933         dpcm_set_fe_runtime(fe_substream);
1934         snd_pcm_limit_hw_rates(runtime);
1935
1936         ret = dpcm_apply_symmetry(fe_substream, stream);
1937         if (ret < 0) {
1938                 dev_err(fe->dev, "ASoC: failed to apply dpcm symmetry %d\n",
1939                         ret);
1940                 goto unwind;
1941         }
1942
1943         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1944         return 0;
1945
1946 unwind:
1947         dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
1948 be_err:
1949         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1950         return ret;
1951 }
1952
1953 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1954 {
1955         struct snd_soc_dpcm *dpcm;
1956
1957         /* only shutdown BEs that are either sinks or sources to this FE DAI */
1958         for_each_dpcm_be(fe, stream, dpcm) {
1959
1960                 struct snd_soc_pcm_runtime *be = dpcm->be;
1961                 struct snd_pcm_substream *be_substream =
1962                         snd_soc_dpcm_get_substream(be, stream);
1963
1964                 /* is this op for this BE ? */
1965                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1966                         continue;
1967
1968                 if (be->dpcm[stream].users == 0)
1969                         dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1970                                 stream ? "capture" : "playback",
1971                                 be->dpcm[stream].state);
1972
1973                 if (--be->dpcm[stream].users != 0)
1974                         continue;
1975
1976                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1977                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)) {
1978                         soc_pcm_hw_free(be_substream);
1979                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1980                 }
1981
1982                 dev_dbg(be->dev, "ASoC: close BE %s\n",
1983                         be->dai_link->name);
1984
1985                 soc_pcm_close(be_substream);
1986                 be_substream->runtime = NULL;
1987
1988                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1989         }
1990         return 0;
1991 }
1992
1993 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
1994 {
1995         struct snd_soc_pcm_runtime *fe = substream->private_data;
1996         int stream = substream->stream;
1997
1998         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1999
2000         /* shutdown the BEs */
2001         dpcm_be_dai_shutdown(fe, substream->stream);
2002
2003         dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
2004
2005         /* now shutdown the frontend */
2006         soc_pcm_close(substream);
2007
2008         /* run the stream event for each BE */
2009         snd_soc_dapm_stream_stop(fe, stream);
2010
2011         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
2012         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2013         return 0;
2014 }
2015
2016 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
2017 {
2018         struct snd_soc_dpcm *dpcm;
2019
2020         /* only hw_params backends that are either sinks or sources
2021          * to this frontend DAI */
2022         for_each_dpcm_be(fe, stream, dpcm) {
2023
2024                 struct snd_soc_pcm_runtime *be = dpcm->be;
2025                 struct snd_pcm_substream *be_substream =
2026                         snd_soc_dpcm_get_substream(be, stream);
2027
2028                 /* is this op for this BE ? */
2029                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2030                         continue;
2031
2032                 /* only free hw when no longer used - check all FEs */
2033                 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2034                                 continue;
2035
2036                 /* do not free hw if this BE is used by other FE */
2037                 if (be->dpcm[stream].users > 1)
2038                         continue;
2039
2040                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2041                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2042                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2043                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
2044                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2045                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2046                         continue;
2047
2048                 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
2049                         be->dai_link->name);
2050
2051                 soc_pcm_hw_free(be_substream);
2052
2053                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2054         }
2055
2056         return 0;
2057 }
2058
2059 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
2060 {
2061         struct snd_soc_pcm_runtime *fe = substream->private_data;
2062         int err, stream = substream->stream;
2063
2064         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2065         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2066
2067         dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
2068
2069         /* call hw_free on the frontend */
2070         err = soc_pcm_hw_free(substream);
2071         if (err < 0)
2072                 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
2073                         fe->dai_link->name);
2074
2075         /* only hw_params backends that are either sinks or sources
2076          * to this frontend DAI */
2077         err = dpcm_be_dai_hw_free(fe, stream);
2078
2079         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2080         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2081
2082         mutex_unlock(&fe->card->mutex);
2083         return 0;
2084 }
2085
2086 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
2087 {
2088         struct snd_soc_dpcm *dpcm;
2089         int ret;
2090
2091         for_each_dpcm_be(fe, stream, dpcm) {
2092
2093                 struct snd_soc_pcm_runtime *be = dpcm->be;
2094                 struct snd_pcm_substream *be_substream =
2095                         snd_soc_dpcm_get_substream(be, stream);
2096
2097                 /* is this op for this BE ? */
2098                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2099                         continue;
2100
2101                 /* copy params for each dpcm */
2102                 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
2103                                 sizeof(struct snd_pcm_hw_params));
2104
2105                 /* perform any hw_params fixups */
2106                 if (be->dai_link->be_hw_params_fixup) {
2107                         ret = be->dai_link->be_hw_params_fixup(be,
2108                                         &dpcm->hw_params);
2109                         if (ret < 0) {
2110                                 dev_err(be->dev,
2111                                         "ASoC: hw_params BE fixup failed %d\n",
2112                                         ret);
2113                                 goto unwind;
2114                         }
2115                 }
2116
2117                 /* copy the fixed-up hw params for BE dai */
2118                 memcpy(&be->dpcm[stream].hw_params, &dpcm->hw_params,
2119                        sizeof(struct snd_pcm_hw_params));
2120
2121                 /* only allow hw_params() if no connected FEs are running */
2122                 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
2123                         continue;
2124
2125                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2126                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2127                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
2128                         continue;
2129
2130                 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
2131                         be->dai_link->name);
2132
2133                 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
2134                 if (ret < 0) {
2135                         dev_err(dpcm->be->dev,
2136                                 "ASoC: hw_params BE failed %d\n", ret);
2137                         goto unwind;
2138                 }
2139
2140                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2141         }
2142         return 0;
2143
2144 unwind:
2145         /* disable any enabled and non active backends */
2146         for_each_dpcm_be_rollback(fe, stream, dpcm) {
2147                 struct snd_soc_pcm_runtime *be = dpcm->be;
2148                 struct snd_pcm_substream *be_substream =
2149                         snd_soc_dpcm_get_substream(be, stream);
2150
2151                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2152                         continue;
2153
2154                 /* only allow hw_free() if no connected FEs are running */
2155                 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2156                         continue;
2157
2158                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2159                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2160                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2161                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2162                         continue;
2163
2164                 soc_pcm_hw_free(be_substream);
2165         }
2166
2167         return ret;
2168 }
2169
2170 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
2171                                  struct snd_pcm_hw_params *params)
2172 {
2173         struct snd_soc_pcm_runtime *fe = substream->private_data;
2174         int ret, stream = substream->stream;
2175
2176         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2177         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2178
2179         memcpy(&fe->dpcm[substream->stream].hw_params, params,
2180                         sizeof(struct snd_pcm_hw_params));
2181         ret = dpcm_be_dai_hw_params(fe, substream->stream);
2182         if (ret < 0) {
2183                 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
2184                 goto out;
2185         }
2186
2187         dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
2188                         fe->dai_link->name, params_rate(params),
2189                         params_channels(params), params_format(params));
2190
2191         /* call hw_params on the frontend */
2192         ret = soc_pcm_hw_params(substream, params);
2193         if (ret < 0) {
2194                 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
2195                 dpcm_be_dai_hw_free(fe, stream);
2196          } else
2197                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2198
2199 out:
2200         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2201         mutex_unlock(&fe->card->mutex);
2202         return ret;
2203 }
2204
2205 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
2206                 struct snd_pcm_substream *substream, int cmd)
2207 {
2208         int ret;
2209
2210         dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n",
2211                         dpcm->be->dai_link->name, cmd);
2212
2213         ret = soc_pcm_trigger(substream, cmd);
2214         if (ret < 0)
2215                 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret);
2216
2217         return ret;
2218 }
2219
2220 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
2221                                int cmd)
2222 {
2223         struct snd_soc_dpcm *dpcm;
2224         int ret = 0;
2225
2226         for_each_dpcm_be(fe, stream, dpcm) {
2227
2228                 struct snd_soc_pcm_runtime *be = dpcm->be;
2229                 struct snd_pcm_substream *be_substream =
2230                         snd_soc_dpcm_get_substream(be, stream);
2231
2232                 /* is this op for this BE ? */
2233                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2234                         continue;
2235
2236                 switch (cmd) {
2237                 case SNDRV_PCM_TRIGGER_START:
2238                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2239                             (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2240                                 continue;
2241
2242                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2243                         if (ret)
2244                                 return ret;
2245
2246                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2247                         break;
2248                 case SNDRV_PCM_TRIGGER_RESUME:
2249                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2250                                 continue;
2251
2252                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2253                         if (ret)
2254                                 return ret;
2255
2256                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2257                         break;
2258                 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2259                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
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_START;
2267                         break;
2268                 case SNDRV_PCM_TRIGGER_STOP:
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_STOP;
2280                         break;
2281                 case SNDRV_PCM_TRIGGER_SUSPEND:
2282                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2283                                 continue;
2284
2285                         if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2286                                 continue;
2287
2288                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2289                         if (ret)
2290                                 return ret;
2291
2292                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
2293                         break;
2294                 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2295                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2296                                 continue;
2297
2298                         if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2299                                 continue;
2300
2301                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2302                         if (ret)
2303                                 return ret;
2304
2305                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2306                         break;
2307                 }
2308         }
2309
2310         return ret;
2311 }
2312 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2313
2314 static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream,
2315                                   int cmd, bool fe_first)
2316 {
2317         struct snd_soc_pcm_runtime *fe = substream->private_data;
2318         int ret;
2319
2320         /* call trigger on the frontend before the backend. */
2321         if (fe_first) {
2322                 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2323                         fe->dai_link->name, cmd);
2324
2325                 ret = soc_pcm_trigger(substream, cmd);
2326                 if (ret < 0)
2327                         return ret;
2328
2329                 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2330                 return ret;
2331         }
2332
2333         /* call trigger on the frontend after the backend. */
2334         ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2335         if (ret < 0)
2336                 return ret;
2337
2338         dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2339                 fe->dai_link->name, cmd);
2340
2341         ret = soc_pcm_trigger(substream, cmd);
2342
2343         return ret;
2344 }
2345
2346 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
2347 {
2348         struct snd_soc_pcm_runtime *fe = substream->private_data;
2349         int stream = substream->stream;
2350         int ret = 0;
2351         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2352
2353         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2354
2355         switch (trigger) {
2356         case SND_SOC_DPCM_TRIGGER_PRE:
2357                 switch (cmd) {
2358                 case SNDRV_PCM_TRIGGER_START:
2359                 case SNDRV_PCM_TRIGGER_RESUME:
2360                 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2361                         ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2362                         break;
2363                 case SNDRV_PCM_TRIGGER_STOP:
2364                 case SNDRV_PCM_TRIGGER_SUSPEND:
2365                 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2366                         ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2367                         break;
2368                 default:
2369                         ret = -EINVAL;
2370                         break;
2371                 }
2372                 break;
2373         case SND_SOC_DPCM_TRIGGER_POST:
2374                 switch (cmd) {
2375                 case SNDRV_PCM_TRIGGER_START:
2376                 case SNDRV_PCM_TRIGGER_RESUME:
2377                 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2378                         ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2379                         break;
2380                 case SNDRV_PCM_TRIGGER_STOP:
2381                 case SNDRV_PCM_TRIGGER_SUSPEND:
2382                 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2383                         ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2384                         break;
2385                 default:
2386                         ret = -EINVAL;
2387                         break;
2388                 }
2389                 break;
2390         case SND_SOC_DPCM_TRIGGER_BESPOKE:
2391                 /* bespoke trigger() - handles both FE and BEs */
2392
2393                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
2394                                 fe->dai_link->name, cmd);
2395
2396                 ret = soc_pcm_bespoke_trigger(substream, cmd);
2397                 break;
2398         default:
2399                 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
2400                                 fe->dai_link->name);
2401                 ret = -EINVAL;
2402                 goto out;
2403         }
2404
2405         if (ret < 0) {
2406                 dev_err(fe->dev, "ASoC: trigger FE cmd: %d failed: %d\n",
2407                         cmd, ret);
2408                 goto out;
2409         }
2410
2411         switch (cmd) {
2412         case SNDRV_PCM_TRIGGER_START:
2413         case SNDRV_PCM_TRIGGER_RESUME:
2414         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2415                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2416                 break;
2417         case SNDRV_PCM_TRIGGER_STOP:
2418         case SNDRV_PCM_TRIGGER_SUSPEND:
2419                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2420                 break;
2421         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2422                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2423                 break;
2424         }
2425
2426 out:
2427         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2428         return ret;
2429 }
2430
2431 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2432 {
2433         struct snd_soc_pcm_runtime *fe = substream->private_data;
2434         int stream = substream->stream;
2435
2436         /* if FE's runtime_update is already set, we're in race;
2437          * process this trigger later at exit
2438          */
2439         if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2440                 fe->dpcm[stream].trigger_pending = cmd + 1;
2441                 return 0; /* delayed, assuming it's successful */
2442         }
2443
2444         /* we're alone, let's trigger */
2445         return dpcm_fe_dai_do_trigger(substream, cmd);
2446 }
2447
2448 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2449 {
2450         struct snd_soc_dpcm *dpcm;
2451         int ret = 0;
2452
2453         for_each_dpcm_be(fe, stream, dpcm) {
2454
2455                 struct snd_soc_pcm_runtime *be = dpcm->be;
2456                 struct snd_pcm_substream *be_substream =
2457                         snd_soc_dpcm_get_substream(be, stream);
2458
2459                 /* is this op for this BE ? */
2460                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2461                         continue;
2462
2463                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2464                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2465                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) &&
2466                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2467                         continue;
2468
2469                 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2470                         be->dai_link->name);
2471
2472                 ret = soc_pcm_prepare(be_substream);
2473                 if (ret < 0) {
2474                         dev_err(be->dev, "ASoC: backend prepare failed %d\n",
2475                                 ret);
2476                         break;
2477                 }
2478
2479                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2480         }
2481         return ret;
2482 }
2483
2484 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2485 {
2486         struct snd_soc_pcm_runtime *fe = substream->private_data;
2487         int stream = substream->stream, ret = 0;
2488
2489         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2490
2491         dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2492
2493         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2494
2495         /* there is no point preparing this FE if there are no BEs */
2496         if (list_empty(&fe->dpcm[stream].be_clients)) {
2497                 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2498                                 fe->dai_link->name);
2499                 ret = -EINVAL;
2500                 goto out;
2501         }
2502
2503         ret = dpcm_be_dai_prepare(fe, substream->stream);
2504         if (ret < 0)
2505                 goto out;
2506
2507         /* call prepare on the frontend */
2508         ret = soc_pcm_prepare(substream);
2509         if (ret < 0) {
2510                 dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
2511                         fe->dai_link->name);
2512                 goto out;
2513         }
2514
2515         /* run the stream event for each BE */
2516         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
2517         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2518
2519 out:
2520         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2521         mutex_unlock(&fe->card->mutex);
2522
2523         return ret;
2524 }
2525
2526 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2527 {
2528         struct snd_pcm_substream *substream =
2529                 snd_soc_dpcm_get_substream(fe, stream);
2530         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2531         int err;
2532
2533         dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2534                         stream ? "capture" : "playback", fe->dai_link->name);
2535
2536         if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2537                 /* call bespoke trigger - FE takes care of all BE triggers */
2538                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2539                                 fe->dai_link->name);
2540
2541                 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2542                 if (err < 0)
2543                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2544         } else {
2545                 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2546                         fe->dai_link->name);
2547
2548                 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2549                 if (err < 0)
2550                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2551         }
2552
2553         err = dpcm_be_dai_hw_free(fe, stream);
2554         if (err < 0)
2555                 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
2556
2557         err = dpcm_be_dai_shutdown(fe, stream);
2558         if (err < 0)
2559                 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
2560
2561         /* run the stream event for each BE */
2562         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2563
2564         return 0;
2565 }
2566
2567 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2568 {
2569         struct snd_pcm_substream *substream =
2570                 snd_soc_dpcm_get_substream(fe, stream);
2571         struct snd_soc_dpcm *dpcm;
2572         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2573         int ret;
2574         unsigned long flags;
2575
2576         dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2577                         stream ? "capture" : "playback", fe->dai_link->name);
2578
2579         /* Only start the BE if the FE is ready */
2580         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2581                 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
2582                 return -EINVAL;
2583
2584         /* startup must always be called for new BEs */
2585         ret = dpcm_be_dai_startup(fe, stream);
2586         if (ret < 0)
2587                 goto disconnect;
2588
2589         /* keep going if FE state is > open */
2590         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2591                 return 0;
2592
2593         ret = dpcm_be_dai_hw_params(fe, stream);
2594         if (ret < 0)
2595                 goto close;
2596
2597         /* keep going if FE state is > hw_params */
2598         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2599                 return 0;
2600
2601
2602         ret = dpcm_be_dai_prepare(fe, stream);
2603         if (ret < 0)
2604                 goto hw_free;
2605
2606         /* run the stream event for each BE */
2607         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2608
2609         /* keep going if FE state is > prepare */
2610         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2611                 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2612                 return 0;
2613
2614         if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2615                 /* call trigger on the frontend - FE takes care of all BE triggers */
2616                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
2617                                 fe->dai_link->name);
2618
2619                 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2620                 if (ret < 0) {
2621                         dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
2622                         goto hw_free;
2623                 }
2624         } else {
2625                 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2626                         fe->dai_link->name);
2627
2628                 ret = dpcm_be_dai_trigger(fe, stream,
2629                                         SNDRV_PCM_TRIGGER_START);
2630                 if (ret < 0) {
2631                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2632                         goto hw_free;
2633                 }
2634         }
2635
2636         return 0;
2637
2638 hw_free:
2639         dpcm_be_dai_hw_free(fe, stream);
2640 close:
2641         dpcm_be_dai_shutdown(fe, stream);
2642 disconnect:
2643         /* disconnect any non started BEs */
2644         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
2645         for_each_dpcm_be(fe, stream, dpcm) {
2646                 struct snd_soc_pcm_runtime *be = dpcm->be;
2647                 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2648                                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2649         }
2650         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
2651
2652         return ret;
2653 }
2654
2655 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
2656 {
2657         int ret;
2658
2659         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2660         ret = dpcm_run_update_startup(fe, stream);
2661         if (ret < 0)
2662                 dev_err(fe->dev, "ASoC: failed to startup some BEs\n");
2663         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2664
2665         return ret;
2666 }
2667
2668 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
2669 {
2670         int ret;
2671
2672         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2673         ret = dpcm_run_update_shutdown(fe, stream);
2674         if (ret < 0)
2675                 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
2676         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2677
2678         return ret;
2679 }
2680
2681 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new)
2682 {
2683         struct snd_soc_dapm_widget_list *list;
2684         int count, paths;
2685
2686         if (!fe->dai_link->dynamic)
2687                 return 0;
2688
2689         /* only check active links */
2690         if (!fe->cpu_dai->active)
2691                 return 0;
2692
2693         /* DAPM sync will call this to update DSP paths */
2694         dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n",
2695                 new ? "new" : "old", fe->dai_link->name);
2696
2697         /* skip if FE doesn't have playback capability */
2698         if (!snd_soc_dai_stream_valid(fe->cpu_dai,   SNDRV_PCM_STREAM_PLAYBACK) ||
2699             !snd_soc_dai_stream_valid(fe->codec_dai, SNDRV_PCM_STREAM_PLAYBACK))
2700                 goto capture;
2701
2702         /* skip if FE isn't currently playing */
2703         if (!fe->cpu_dai->playback_active || !fe->codec_dai->playback_active)
2704                 goto capture;
2705
2706         paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
2707         if (paths < 0) {
2708                 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2709                          fe->dai_link->name,  "playback");
2710                 return paths;
2711         }
2712
2713         /* update any playback paths */
2714         count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, new);
2715         if (count) {
2716                 if (new)
2717                         dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2718                 else
2719                         dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2720
2721                 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2722                 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2723         }
2724
2725         dpcm_path_put(&list);
2726
2727 capture:
2728         /* skip if FE doesn't have capture capability */
2729         if (!snd_soc_dai_stream_valid(fe->cpu_dai,   SNDRV_PCM_STREAM_CAPTURE) ||
2730             !snd_soc_dai_stream_valid(fe->codec_dai, SNDRV_PCM_STREAM_CAPTURE))
2731                 return 0;
2732
2733         /* skip if FE isn't currently capturing */
2734         if (!fe->cpu_dai->capture_active || !fe->codec_dai->capture_active)
2735                 return 0;
2736
2737         paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
2738         if (paths < 0) {
2739                 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2740                          fe->dai_link->name,  "capture");
2741                 return paths;
2742         }
2743
2744         /* update any old capture paths */
2745         count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, new);
2746         if (count) {
2747                 if (new)
2748                         dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2749                 else
2750                         dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2751
2752                 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2753                 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2754         }
2755
2756         dpcm_path_put(&list);
2757
2758         return 0;
2759 }
2760
2761 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2762  * any DAI links.
2763  */
2764 int soc_dpcm_runtime_update(struct snd_soc_card *card)
2765 {
2766         struct snd_soc_pcm_runtime *fe;
2767         int ret = 0;
2768
2769         mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2770         /* shutdown all old paths first */
2771         for_each_card_rtds(card, fe) {
2772                 ret = soc_dpcm_fe_runtime_update(fe, 0);
2773                 if (ret)
2774                         goto out;
2775         }
2776
2777         /* bring new paths up */
2778         for_each_card_rtds(card, fe) {
2779                 ret = soc_dpcm_fe_runtime_update(fe, 1);
2780                 if (ret)
2781                         goto out;
2782         }
2783
2784 out:
2785         mutex_unlock(&card->mutex);
2786         return ret;
2787 }
2788 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
2789 {
2790         struct snd_soc_dpcm *dpcm;
2791         struct snd_soc_dai *dai;
2792
2793         for_each_dpcm_be(fe, SNDRV_PCM_STREAM_PLAYBACK, dpcm) {
2794
2795                 struct snd_soc_pcm_runtime *be = dpcm->be;
2796                 int i;
2797
2798                 if (be->dai_link->ignore_suspend)
2799                         continue;
2800
2801                 for_each_rtd_codec_dai(be, i, dai) {
2802                         struct snd_soc_dai_driver *drv = dai->driver;
2803
2804                         dev_dbg(be->dev, "ASoC: BE digital mute %s\n",
2805                                          be->dai_link->name);
2806
2807                         if (drv->ops && drv->ops->digital_mute &&
2808                                                         dai->playback_active)
2809                                 drv->ops->digital_mute(dai, mute);
2810                 }
2811         }
2812
2813         return 0;
2814 }
2815
2816 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2817 {
2818         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2819         struct snd_soc_dpcm *dpcm;
2820         struct snd_soc_dapm_widget_list *list;
2821         int ret;
2822         int stream = fe_substream->stream;
2823
2824         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2825         fe->dpcm[stream].runtime = fe_substream->runtime;
2826
2827         ret = dpcm_path_get(fe, stream, &list);
2828         if (ret < 0) {
2829                 mutex_unlock(&fe->card->mutex);
2830                 return ret;
2831         } else if (ret == 0) {
2832                 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
2833                         fe->dai_link->name, stream ? "capture" : "playback");
2834         }
2835
2836         /* calculate valid and active FE <-> BE dpcms */
2837         dpcm_process_paths(fe, stream, &list, 1);
2838
2839         ret = dpcm_fe_dai_startup(fe_substream);
2840         if (ret < 0) {
2841                 /* clean up all links */
2842                 for_each_dpcm_be(fe, stream, dpcm)
2843                         dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2844
2845                 dpcm_be_disconnect(fe, stream);
2846                 fe->dpcm[stream].runtime = NULL;
2847         }
2848
2849         dpcm_clear_pending_state(fe, stream);
2850         dpcm_path_put(&list);
2851         mutex_unlock(&fe->card->mutex);
2852         return ret;
2853 }
2854
2855 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2856 {
2857         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2858         struct snd_soc_dpcm *dpcm;
2859         int stream = fe_substream->stream, ret;
2860
2861         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2862         ret = dpcm_fe_dai_shutdown(fe_substream);
2863
2864         /* mark FE's links ready to prune */
2865         for_each_dpcm_be(fe, stream, dpcm)
2866                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2867
2868         dpcm_be_disconnect(fe, stream);
2869
2870         fe->dpcm[stream].runtime = NULL;
2871         mutex_unlock(&fe->card->mutex);
2872         return ret;
2873 }
2874
2875 /* create a new pcm */
2876 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2877 {
2878         struct snd_soc_dai *codec_dai;
2879         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2880         struct snd_soc_component *component;
2881         struct snd_pcm *pcm;
2882         char new_name[64];
2883         int ret = 0, playback = 0, capture = 0;
2884         int i;
2885
2886         if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
2887                 playback = rtd->dai_link->dpcm_playback;
2888                 capture = rtd->dai_link->dpcm_capture;
2889         } else {
2890                 /* Adapt stream for codec2codec links */
2891                 struct snd_soc_pcm_stream *cpu_capture = rtd->dai_link->params ?
2892                         &cpu_dai->driver->playback : &cpu_dai->driver->capture;
2893                 struct snd_soc_pcm_stream *cpu_playback = rtd->dai_link->params ?
2894                         &cpu_dai->driver->capture : &cpu_dai->driver->playback;
2895
2896                 for_each_rtd_codec_dai(rtd, i, codec_dai) {
2897                         if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) &&
2898                             snd_soc_dai_stream_valid(cpu_dai,   SNDRV_PCM_STREAM_PLAYBACK))
2899                                 playback = 1;
2900                         if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) &&
2901                             snd_soc_dai_stream_valid(cpu_dai,   SNDRV_PCM_STREAM_CAPTURE))
2902                                 capture = 1;
2903                 }
2904
2905                 capture = capture && cpu_capture->channels_min;
2906                 playback = playback && cpu_playback->channels_min;
2907         }
2908
2909         if (rtd->dai_link->playback_only) {
2910                 playback = 1;
2911                 capture = 0;
2912         }
2913
2914         if (rtd->dai_link->capture_only) {
2915                 playback = 0;
2916                 capture = 1;
2917         }
2918
2919         /* create the PCM */
2920         if (rtd->dai_link->params) {
2921                 snprintf(new_name, sizeof(new_name), "codec2codec(%s)",
2922                          rtd->dai_link->stream_name);
2923
2924                 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2925                                            playback, capture, &pcm);
2926         } else if (rtd->dai_link->no_pcm) {
2927                 snprintf(new_name, sizeof(new_name), "(%s)",
2928                         rtd->dai_link->stream_name);
2929
2930                 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2931                                 playback, capture, &pcm);
2932         } else {
2933                 if (rtd->dai_link->dynamic)
2934                         snprintf(new_name, sizeof(new_name), "%s (*)",
2935                                 rtd->dai_link->stream_name);
2936                 else
2937                         snprintf(new_name, sizeof(new_name), "%s %s-%d",
2938                                 rtd->dai_link->stream_name,
2939                                 (rtd->num_codecs > 1) ?
2940                                 "multicodec" : rtd->codec_dai->name, num);
2941
2942                 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2943                         capture, &pcm);
2944         }
2945         if (ret < 0) {
2946                 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
2947                         rtd->dai_link->name);
2948                 return ret;
2949         }
2950         dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
2951
2952         /* DAPM dai link stream work */
2953         if (rtd->dai_link->params)
2954                 rtd->close_delayed_work_func = codec2codec_close_delayed_work;
2955         else
2956                 rtd->close_delayed_work_func = snd_soc_close_delayed_work;
2957
2958         pcm->nonatomic = rtd->dai_link->nonatomic;
2959         rtd->pcm = pcm;
2960         pcm->private_data = rtd;
2961
2962         if (rtd->dai_link->no_pcm || rtd->dai_link->params) {
2963                 if (playback)
2964                         pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2965                 if (capture)
2966                         pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2967                 goto out;
2968         }
2969
2970         /* ASoC PCM operations */
2971         if (rtd->dai_link->dynamic) {
2972                 rtd->ops.open           = dpcm_fe_dai_open;
2973                 rtd->ops.hw_params      = dpcm_fe_dai_hw_params;
2974                 rtd->ops.prepare        = dpcm_fe_dai_prepare;
2975                 rtd->ops.trigger        = dpcm_fe_dai_trigger;
2976                 rtd->ops.hw_free        = dpcm_fe_dai_hw_free;
2977                 rtd->ops.close          = dpcm_fe_dai_close;
2978                 rtd->ops.pointer        = soc_pcm_pointer;
2979         } else {
2980                 rtd->ops.open           = soc_pcm_open;
2981                 rtd->ops.hw_params      = soc_pcm_hw_params;
2982                 rtd->ops.prepare        = soc_pcm_prepare;
2983                 rtd->ops.trigger        = soc_pcm_trigger;
2984                 rtd->ops.hw_free        = soc_pcm_hw_free;
2985                 rtd->ops.close          = soc_pcm_close;
2986                 rtd->ops.pointer        = soc_pcm_pointer;
2987         }
2988
2989         for_each_rtd_components(rtd, i, component) {
2990                 const struct snd_soc_component_driver *drv = component->driver;
2991
2992                 if (drv->ioctl)
2993                         rtd->ops.ioctl          = snd_soc_pcm_component_ioctl;
2994                 if (drv->sync_stop)
2995                         rtd->ops.sync_stop      = snd_soc_pcm_component_sync_stop;
2996                 if (drv->copy_user)
2997                         rtd->ops.copy_user      = snd_soc_pcm_component_copy_user;
2998                 if (drv->page)
2999                         rtd->ops.page           = snd_soc_pcm_component_page;
3000                 if (drv->mmap)
3001                         rtd->ops.mmap           = snd_soc_pcm_component_mmap;
3002         }
3003
3004         if (playback)
3005                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
3006
3007         if (capture)
3008                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
3009
3010         ret = snd_soc_pcm_component_new(rtd);
3011         if (ret < 0) {
3012                 dev_err(rtd->dev, "ASoC: pcm constructor failed: %d\n", ret);
3013                 return ret;
3014         }
3015
3016         pcm->no_device_suspend = true;
3017 out:
3018         dev_info(rtd->card->dev, "%s <-> %s mapping ok\n",
3019                  (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name,
3020                  cpu_dai->name);
3021         return ret;
3022 }
3023
3024 /* is the current PCM operation for this FE ? */
3025 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
3026 {
3027         if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
3028                 return 1;
3029         return 0;
3030 }
3031 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
3032
3033 /* is the current PCM operation for this BE ? */
3034 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
3035                 struct snd_soc_pcm_runtime *be, int stream)
3036 {
3037         if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
3038            ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
3039                   be->dpcm[stream].runtime_update))
3040                 return 1;
3041         return 0;
3042 }
3043 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
3044
3045 /* get the substream for this BE */
3046 struct snd_pcm_substream *
3047         snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
3048 {
3049         return be->pcm->streams[stream].substream;
3050 }
3051 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
3052
3053 /* get the BE runtime state */
3054 enum snd_soc_dpcm_state
3055         snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream)
3056 {
3057         return be->dpcm[stream].state;
3058 }
3059 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state);
3060
3061 /* set the BE runtime state */
3062 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be,
3063                 int stream, enum snd_soc_dpcm_state state)
3064 {
3065         be->dpcm[stream].state = state;
3066 }
3067 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state);
3068
3069 /*
3070  * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
3071  * are not running, paused or suspended for the specified stream direction.
3072  */
3073 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
3074                 struct snd_soc_pcm_runtime *be, int stream)
3075 {
3076         struct snd_soc_dpcm *dpcm;
3077         int state;
3078         int ret = 1;
3079         unsigned long flags;
3080
3081         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3082         for_each_dpcm_fe(be, stream, dpcm) {
3083
3084                 if (dpcm->fe == fe)
3085                         continue;
3086
3087                 state = dpcm->fe->dpcm[stream].state;
3088                 if (state == SND_SOC_DPCM_STATE_START ||
3089                         state == SND_SOC_DPCM_STATE_PAUSED ||
3090                         state == SND_SOC_DPCM_STATE_SUSPEND) {
3091                         ret = 0;
3092                         break;
3093                 }
3094         }
3095         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3096
3097         /* it's safe to free/stop this BE DAI */
3098         return ret;
3099 }
3100 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
3101
3102 /*
3103  * We can only change hw params a BE DAI if any of it's FE are not prepared,
3104  * running, paused or suspended for the specified stream direction.
3105  */
3106 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
3107                 struct snd_soc_pcm_runtime *be, int stream)
3108 {
3109         struct snd_soc_dpcm *dpcm;
3110         int state;
3111         int ret = 1;
3112         unsigned long flags;
3113
3114         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3115         for_each_dpcm_fe(be, stream, dpcm) {
3116
3117                 if (dpcm->fe == fe)
3118                         continue;
3119
3120                 state = dpcm->fe->dpcm[stream].state;
3121                 if (state == SND_SOC_DPCM_STATE_START ||
3122                         state == SND_SOC_DPCM_STATE_PAUSED ||
3123                         state == SND_SOC_DPCM_STATE_SUSPEND ||
3124                         state == SND_SOC_DPCM_STATE_PREPARE) {
3125                         ret = 0;
3126                         break;
3127                 }
3128         }
3129         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3130
3131         /* it's safe to change hw_params */
3132         return ret;
3133 }
3134 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
3135
3136 #ifdef CONFIG_DEBUG_FS
3137 static const char *dpcm_state_string(enum snd_soc_dpcm_state state)
3138 {
3139         switch (state) {
3140         case SND_SOC_DPCM_STATE_NEW:
3141                 return "new";
3142         case SND_SOC_DPCM_STATE_OPEN:
3143                 return "open";
3144         case SND_SOC_DPCM_STATE_HW_PARAMS:
3145                 return "hw_params";
3146         case SND_SOC_DPCM_STATE_PREPARE:
3147                 return "prepare";
3148         case SND_SOC_DPCM_STATE_START:
3149                 return "start";
3150         case SND_SOC_DPCM_STATE_STOP:
3151                 return "stop";
3152         case SND_SOC_DPCM_STATE_SUSPEND:
3153                 return "suspend";
3154         case SND_SOC_DPCM_STATE_PAUSED:
3155                 return "paused";
3156         case SND_SOC_DPCM_STATE_HW_FREE:
3157                 return "hw_free";
3158         case SND_SOC_DPCM_STATE_CLOSE:
3159                 return "close";
3160         }
3161
3162         return "unknown";
3163 }
3164
3165 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
3166                                 int stream, char *buf, size_t size)
3167 {
3168         struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
3169         struct snd_soc_dpcm *dpcm;
3170         ssize_t offset = 0;
3171         unsigned long flags;
3172
3173         /* FE state */
3174         offset += snprintf(buf + offset, size - offset,
3175                         "[%s - %s]\n", fe->dai_link->name,
3176                         stream ? "Capture" : "Playback");
3177
3178         offset += snprintf(buf + offset, size - offset, "State: %s\n",
3179                         dpcm_state_string(fe->dpcm[stream].state));
3180
3181         if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3182             (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3183                 offset += snprintf(buf + offset, size - offset,
3184                                 "Hardware Params: "
3185                                 "Format = %s, Channels = %d, Rate = %d\n",
3186                                 snd_pcm_format_name(params_format(params)),
3187                                 params_channels(params),
3188                                 params_rate(params));
3189
3190         /* BEs state */
3191         offset += snprintf(buf + offset, size - offset, "Backends:\n");
3192
3193         if (list_empty(&fe->dpcm[stream].be_clients)) {
3194                 offset += snprintf(buf + offset, size - offset,
3195                                 " No active DSP links\n");
3196                 goto out;
3197         }
3198
3199         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3200         for_each_dpcm_be(fe, stream, dpcm) {
3201                 struct snd_soc_pcm_runtime *be = dpcm->be;
3202                 params = &dpcm->hw_params;
3203
3204                 offset += snprintf(buf + offset, size - offset,
3205                                 "- %s\n", be->dai_link->name);
3206
3207                 offset += snprintf(buf + offset, size - offset,
3208                                 "   State: %s\n",
3209                                 dpcm_state_string(be->dpcm[stream].state));
3210
3211                 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3212                     (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3213                         offset += snprintf(buf + offset, size - offset,
3214                                 "   Hardware Params: "
3215                                 "Format = %s, Channels = %d, Rate = %d\n",
3216                                 snd_pcm_format_name(params_format(params)),
3217                                 params_channels(params),
3218                                 params_rate(params));
3219         }
3220         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3221 out:
3222         return offset;
3223 }
3224
3225 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
3226                                 size_t count, loff_t *ppos)
3227 {
3228         struct snd_soc_pcm_runtime *fe = file->private_data;
3229         ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
3230         char *buf;
3231
3232         buf = kmalloc(out_count, GFP_KERNEL);
3233         if (!buf)
3234                 return -ENOMEM;
3235
3236         if (snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_PLAYBACK))
3237                 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
3238                                         buf + offset, out_count - offset);
3239
3240         if (snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_CAPTURE))
3241                 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE,
3242                                         buf + offset, out_count - offset);
3243
3244         ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
3245
3246         kfree(buf);
3247         return ret;
3248 }
3249
3250 static const struct file_operations dpcm_state_fops = {
3251         .open = simple_open,
3252         .read = dpcm_state_read_file,
3253         .llseek = default_llseek,
3254 };
3255
3256 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
3257 {
3258         if (!rtd->dai_link)
3259                 return;
3260
3261         if (!rtd->dai_link->dynamic)
3262                 return;
3263
3264         if (!rtd->card->debugfs_card_root)
3265                 return;
3266
3267         rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
3268                         rtd->card->debugfs_card_root);
3269
3270         debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root,
3271                             rtd, &dpcm_state_fops);
3272 }
3273 #endif