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 /**
  32  * snd_soc_runtime_activate() - Increment active count for PCM runtime components
  33  * @rtd: ASoC PCM runtime that is activated
  34  * @stream: Direction of the PCM stream
  35  *
  36  * Increments the active count for all the DAIs and components attached to a PCM
  37  * runtime. Should typically be called when a stream is opened.
  38  *
  39  * Must be called with the rtd->card->pcm_mutex being held
  40  */
  41 void snd_soc_runtime_activate(struct snd_soc_pcm_runtime *rtd, int stream)
  42 {
  43         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  44         struct snd_soc_dai *codec_dai;
  45         int i;
  46
  47         lockdep_assert_held(&rtd->card->pcm_mutex);
  48
  49         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
  50                 cpu_dai->playback_active++;
  51                 for_each_rtd_codec_dai(rtd, i, codec_dai)
  52                         codec_dai->playback_active++;
  53         } else {
  54                 cpu_dai->capture_active++;
  55                 for_each_rtd_codec_dai(rtd, i, codec_dai)
  56                         codec_dai->capture_active++;
  57         }
  58
  59         cpu_dai->active++;
  60         cpu_dai->component->active++;
  61         for_each_rtd_codec_dai(rtd, i, codec_dai) {
  62                 codec_dai->active++;
  63                 codec_dai->component->active++;
  64         }
  65 }
  66
  67 /**
  68  * snd_soc_runtime_deactivate() - Decrement active count for PCM runtime components
  69  * @rtd: ASoC PCM runtime that is deactivated
  70  * @stream: Direction of the PCM stream
  71  *
  72  * Decrements the active count for all the DAIs and components attached to a PCM
  73  * runtime. Should typically be called when a stream is closed.
  74  *
  75  * Must be called with the rtd->card->pcm_mutex being held
  76  */
  77 void snd_soc_runtime_deactivate(struct snd_soc_pcm_runtime *rtd, int stream)
  78 {
  79         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  80         struct snd_soc_dai *codec_dai;
  81         int i;
  82
  83         lockdep_assert_held(&rtd->card->pcm_mutex);
  84
  85         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
  86                 cpu_dai->playback_active--;
  87                 for_each_rtd_codec_dai(rtd, i, codec_dai)
  88                         codec_dai->playback_active--;
  89         } else {
  90                 cpu_dai->capture_active--;
  91                 for_each_rtd_codec_dai(rtd, i, codec_dai)
  92                         codec_dai->capture_active--;
  93         }
  94
  95         cpu_dai->active--;
  96         cpu_dai->component->active--;
  97         for_each_rtd_codec_dai(rtd, i, codec_dai) {
  98                 codec_dai->component->active--;
  99                 codec_dai->active--;
 100         }
 101 }
 102
 103 /**
 104  * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay
 105  * @rtd: The ASoC PCM runtime that should be checked.
 106  *
 107  * This function checks whether the power down delay should be ignored for a
 108  * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has
 109  * been configured to ignore the delay, or if none of the components benefits
 110  * from having the delay.
 111  */
 112 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd)
 113 {
 114         struct snd_soc_rtdcom_list *rtdcom;
 115         struct snd_soc_component *component;
 116         bool ignore = true;
 117
 118         if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time)
 119                 return true;
 120
 121         for_each_rtdcom(rtd, rtdcom) {
 122                 component = rtdcom->component;
 123
 124                 ignore &= !component->driver->use_pmdown_time;
 125         }
 126
 127         return ignore;
 128 }
 129
 130 /**
 131  * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
 132  * @substream: the pcm substream
 133  * @hw: the hardware parameters
 134  *
 135  * Sets the substream runtime hardware parameters.
 136  */
 137 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
 138         const struct snd_pcm_hardware *hw)
 139 {
 140         struct snd_pcm_runtime *runtime = substream->runtime;
 141         runtime->hw.info = hw->info;
 142         runtime->hw.formats = hw->formats;
 143         runtime->hw.period_bytes_min = hw->period_bytes_min;
 144         runtime->hw.period_bytes_max = hw->period_bytes_max;
 145         runtime->hw.periods_min = hw->periods_min;
 146         runtime->hw.periods_max = hw->periods_max;
 147         runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
 148         runtime->hw.fifo_size = hw->fifo_size;
 149         return 0;
 150 }
 151 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
 152
 153 /* DPCM stream event, send event to FE and all active BEs. */
 154 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
 155         int event)
 156 {
 157         struct snd_soc_dpcm *dpcm;
 158
 159         for_each_dpcm_be(fe, dir, dpcm) {
 160
 161                 struct snd_soc_pcm_runtime *be = dpcm->be;
 162
 163                 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n",
 164                                 be->dai_link->name, event, dir);
 165
 166                 if ((event == SND_SOC_DAPM_STREAM_STOP) &&
 167                     (be->dpcm[dir].users >= 1))
 168                         continue;
 169
 170                 snd_soc_dapm_stream_event(be, dir, event);
 171         }
 172
 173         snd_soc_dapm_stream_event(fe, dir, event);
 174
 175         return 0;
 176 }
 177
 178 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
 179                                         struct snd_soc_dai *soc_dai)
 180 {
 181         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 182         int ret;
 183
 184         if (soc_dai->rate && (soc_dai->driver->symmetric_rates ||
 185                                 rtd->dai_link->symmetric_rates)) {
 186                 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %dHz rate\n",
 187                                 soc_dai->rate);
 188
 189                 ret = snd_pcm_hw_constraint_single(substream->runtime,
 190                                                 SNDRV_PCM_HW_PARAM_RATE,
 191                                                 soc_dai->rate);
 192                 if (ret < 0) {
 193                         dev_err(soc_dai->dev,
 194                                 "ASoC: Unable to apply rate constraint: %d\n",
 195                                 ret);
 196                         return ret;
 197                 }
 198         }
 199
 200         if (soc_dai->channels && (soc_dai->driver->symmetric_channels ||
 201                                 rtd->dai_link->symmetric_channels)) {
 202                 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d channel(s)\n",
 203                                 soc_dai->channels);
 204
 205                 ret = snd_pcm_hw_constraint_single(substream->runtime,
 206                                                 SNDRV_PCM_HW_PARAM_CHANNELS,
 207                                                 soc_dai->channels);
 208                 if (ret < 0) {
 209                         dev_err(soc_dai->dev,
 210                                 "ASoC: Unable to apply channel symmetry constraint: %d\n",
 211                                 ret);
 212                         return ret;
 213                 }
 214         }
 215
 216         if (soc_dai->sample_bits && (soc_dai->driver->symmetric_samplebits ||
 217                                 rtd->dai_link->symmetric_samplebits)) {
 218                 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d sample bits\n",
 219                                 soc_dai->sample_bits);
 220
 221                 ret = snd_pcm_hw_constraint_single(substream->runtime,
 222                                                 SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
 223                                                 soc_dai->sample_bits);
 224                 if (ret < 0) {
 225                         dev_err(soc_dai->dev,
 226                                 "ASoC: Unable to apply sample bits symmetry constraint: %d\n",
 227                                 ret);
 228                         return ret;
 229                 }
 230         }
 231
 232         return 0;
 233 }
 234
 235 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream,
 236                                 struct snd_pcm_hw_params *params)
 237 {
 238         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 239         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 240         struct snd_soc_dai *codec_dai;
 241         unsigned int rate, channels, sample_bits, symmetry, i;
 242
 243         rate = params_rate(params);
 244         channels = params_channels(params);
 245         sample_bits = snd_pcm_format_physical_width(params_format(params));
 246
 247         /* reject unmatched parameters when applying symmetry */
 248         symmetry = cpu_dai->driver->symmetric_rates ||
 249                 rtd->dai_link->symmetric_rates;
 250
 251         for_each_rtd_codec_dai(rtd, i, codec_dai)
 252                 symmetry |= codec_dai->driver->symmetric_rates;
 253
 254         if (symmetry && cpu_dai->rate && cpu_dai->rate != rate) {
 255                 dev_err(rtd->dev, "ASoC: unmatched rate symmetry: %d - %d\n",
 256                                 cpu_dai->rate, rate);
 257                 return -EINVAL;
 258         }
 259
 260         symmetry = cpu_dai->driver->symmetric_channels ||
 261                 rtd->dai_link->symmetric_channels;
 262
 263         for_each_rtd_codec_dai(rtd, i, codec_dai)
 264                 symmetry |= codec_dai->driver->symmetric_channels;
 265
 266         if (symmetry && cpu_dai->channels && cpu_dai->channels != channels) {
 267                 dev_err(rtd->dev, "ASoC: unmatched channel symmetry: %d - %d\n",
 268                                 cpu_dai->channels, channels);
 269                 return -EINVAL;
 270         }
 271
 272         symmetry = cpu_dai->driver->symmetric_samplebits ||
 273                 rtd->dai_link->symmetric_samplebits;
 274
 275         for_each_rtd_codec_dai(rtd, i, codec_dai)
 276                 symmetry |= codec_dai->driver->symmetric_samplebits;
 277
 278         if (symmetry && cpu_dai->sample_bits && cpu_dai->sample_bits != sample_bits) {
 279                 dev_err(rtd->dev, "ASoC: unmatched sample bits symmetry: %d - %d\n",
 280                                 cpu_dai->sample_bits, sample_bits);
 281                 return -EINVAL;
 282         }
 283
 284         return 0;
 285 }
 286
 287 static bool soc_pcm_has_symmetry(struct snd_pcm_substream *substream)
 288 {
 289         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 290         struct snd_soc_dai_driver *cpu_driver = rtd->cpu_dai->driver;
 291         struct snd_soc_dai_link *link = rtd->dai_link;
 292         struct snd_soc_dai *codec_dai;
 293         unsigned int symmetry, i;
 294
 295         symmetry = cpu_driver->symmetric_rates || link->symmetric_rates ||
 296                 cpu_driver->symmetric_channels || link->symmetric_channels ||
 297                 cpu_driver->symmetric_samplebits || link->symmetric_samplebits;
 298
 299         for_each_rtd_codec_dai(rtd, i, codec_dai)
 300                 symmetry = symmetry ||
 301                         codec_dai->driver->symmetric_rates ||
 302                         codec_dai->driver->symmetric_channels ||
 303                         codec_dai->driver->symmetric_samplebits;
 304
 305         return symmetry;
 306 }
 307
 308 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits)
 309 {
 310         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 311         int ret;
 312
 313         if (!bits)
 314                 return;
 315
 316         ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits);
 317         if (ret != 0)
 318                 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n",
 319                                  bits, ret);
 320 }
 321
 322 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream)
 323 {
 324         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 325         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 326         struct snd_soc_dai *codec_dai;
 327         int i;
 328         unsigned int bits = 0, cpu_bits;
 329
 330         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 331                 for_each_rtd_codec_dai(rtd, i, codec_dai) {
 332                         if (codec_dai->driver->playback.sig_bits == 0) {
 333                                 bits = 0;
 334                                 break;
 335                         }
 336                         bits = max(codec_dai->driver->playback.sig_bits, bits);
 337                 }
 338                 cpu_bits = cpu_dai->driver->playback.sig_bits;
 339         } else {
 340                 for_each_rtd_codec_dai(rtd, i, codec_dai) {
 341                         if (codec_dai->driver->capture.sig_bits == 0) {
 342                                 bits = 0;
 343                                 break;
 344                         }
 345                         bits = max(codec_dai->driver->capture.sig_bits, bits);
 346                 }
 347                 cpu_bits = cpu_dai->driver->capture.sig_bits;
 348         }
 349
 350         soc_pcm_set_msb(substream, bits);
 351         soc_pcm_set_msb(substream, cpu_bits);
 352 }
 353
 354 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream)
 355 {
 356         struct snd_pcm_runtime *runtime = substream->runtime;
 357         struct snd_pcm_hardware *hw = &runtime->hw;
 358         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 359         struct snd_soc_dai *codec_dai;
 360         struct snd_soc_dai_driver *cpu_dai_drv = rtd->cpu_dai->driver;
 361         struct snd_soc_dai_driver *codec_dai_drv;
 362         struct snd_soc_pcm_stream *codec_stream;
 363         struct snd_soc_pcm_stream *cpu_stream;
 364         unsigned int chan_min = 0, chan_max = UINT_MAX;
 365         unsigned int rate_min = 0, rate_max = UINT_MAX;
 366         unsigned int rates = UINT_MAX;
 367         u64 formats = ULLONG_MAX;
 368         int i;
 369
 370         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 371                 cpu_stream = &cpu_dai_drv->playback;
 372         else
 373                 cpu_stream = &cpu_dai_drv->capture;
 374
 375         /* first calculate min/max only for CODECs in the DAI link */
 376         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 377
 378                 /*
 379                  * Skip CODECs which don't support the current stream type.
 380                  * Otherwise, since the rate, channel, and format values will
 381                  * zero in that case, we would have no usable settings left,
 382                  * causing the resulting setup to fail.
 383                  * At least one CODEC should match, otherwise we should have
 384                  * bailed out on a higher level, since there would be no
 385                  * CODEC to support the transfer direction in that case.
 386                  */
 387                 if (!snd_soc_dai_stream_valid(codec_dai,
 388                                               substream->stream))
 389                         continue;
 390
 391                 codec_dai_drv = codec_dai->driver;
 392                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 393                         codec_stream = &codec_dai_drv->playback;
 394                 else
 395                         codec_stream = &codec_dai_drv->capture;
 396                 chan_min = max(chan_min, codec_stream->channels_min);
 397                 chan_max = min(chan_max, codec_stream->channels_max);
 398                 rate_min = max(rate_min, codec_stream->rate_min);
 399                 rate_max = min_not_zero(rate_max, codec_stream->rate_max);
 400                 formats &= codec_stream->formats;
 401                 rates = snd_pcm_rate_mask_intersect(codec_stream->rates, rates);
 402         }
 403
 404         /*
 405          * chan min/max cannot be enforced if there are multiple CODEC DAIs
 406          * connected to a single CPU DAI, use CPU DAI's directly and let
 407          * channel allocation be fixed up later
 408          */
 409         if (rtd->num_codecs > 1) {
 410                 chan_min = cpu_stream->channels_min;
 411                 chan_max = cpu_stream->channels_max;
 412         }
 413
 414         hw->channels_min = max(chan_min, cpu_stream->channels_min);
 415         hw->channels_max = min(chan_max, cpu_stream->channels_max);
 416         if (hw->formats)
 417                 hw->formats &= formats & cpu_stream->formats;
 418         else
 419                 hw->formats = formats & cpu_stream->formats;
 420         hw->rates = snd_pcm_rate_mask_intersect(rates, cpu_stream->rates);
 421
 422         snd_pcm_limit_hw_rates(runtime);
 423
 424         hw->rate_min = max(hw->rate_min, cpu_stream->rate_min);
 425         hw->rate_min = max(hw->rate_min, rate_min);
 426         hw->rate_max = min_not_zero(hw->rate_max, cpu_stream->rate_max);
 427         hw->rate_max = min_not_zero(hw->rate_max, rate_max);
 428 }
 429
 430 static int soc_pcm_components_open(struct snd_pcm_substream *substream,
 431                                    struct snd_soc_component **last)
 432 {
 433         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 434         struct snd_soc_rtdcom_list *rtdcom;
 435         struct snd_soc_component *component;
 436         int ret = 0;
 437
 438         for_each_rtdcom(rtd, rtdcom) {
 439                 component = rtdcom->component;
 440                 *last = component;
 441
 442                 ret = snd_soc_component_module_get_when_open(component);
 443                 if (ret < 0) {
 444                         dev_err(component->dev,
 445                                 "ASoC: can't get module %s\n",
 446                                 component->name);
 447                         return ret;
 448                 }
 449
 450                 ret = snd_soc_component_open(component, substream);
 451                 if (ret < 0) {
 452                         dev_err(component->dev,
 453                                 "ASoC: can't open component %s: %d\n",
 454                                 component->name, ret);
 455                         return ret;
 456                 }
 457         }
 458         *last = NULL;
 459         return 0;
 460 }
 461
 462 static int soc_pcm_components_close(struct snd_pcm_substream *substream,
 463                                     struct snd_soc_component *last)
 464 {
 465         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 466         struct snd_soc_rtdcom_list *rtdcom;
 467         struct snd_soc_component *component;
 468         int ret = 0;
 469
 470         for_each_rtdcom(rtd, rtdcom) {
 471                 component = rtdcom->component;
 472
 473                 if (component == last)
 474                         break;
 475
 476                 ret |= snd_soc_component_close(component, substream);
 477                 snd_soc_component_module_put_when_close(component);
 478         }
 479
 480         return ret;
 481 }
 482
 483 /*
 484  * Called by ALSA when a PCM substream is opened, the runtime->hw record is
 485  * then initialized and any private data can be allocated. This also calls
 486  * startup for the cpu DAI, component, machine and codec DAI.
 487  */
 488 static int soc_pcm_open(struct snd_pcm_substream *substream)
 489 {
 490         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 491         struct snd_pcm_runtime *runtime = substream->runtime;
 492         struct snd_soc_component *component;
 493         struct snd_soc_rtdcom_list *rtdcom;
 494         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 495         struct snd_soc_dai *codec_dai;
 496         const char *codec_dai_name = "multicodec";
 497         int i, ret = 0;
 498
 499         pinctrl_pm_select_default_state(cpu_dai->dev);
 500         for_each_rtd_codec_dai(rtd, i, codec_dai)
 501                 pinctrl_pm_select_default_state(codec_dai->dev);
 502
 503         for_each_rtdcom(rtd, rtdcom) {
 504                 component = rtdcom->component;
 505
 506                 pm_runtime_get_sync(component->dev);
 507         }
 508
 509         mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
 510
 511         /* startup the audio subsystem */
 512         ret = snd_soc_dai_startup(cpu_dai, substream);
 513         if (ret < 0) {
 514                 dev_err(cpu_dai->dev, "ASoC: can't open interface %s: %d\n",
 515                         cpu_dai->name, ret);
 516                 goto out;
 517         }
 518
 519         ret = soc_pcm_components_open(substream, &component);
 520         if (ret < 0)
 521                 goto component_err;
 522
 523         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 524                 ret = snd_soc_dai_startup(codec_dai, substream);
 525                 if (ret < 0) {
 526                         dev_err(codec_dai->dev,
 527                                 "ASoC: can't open codec %s: %d\n",
 528                                 codec_dai->name, ret);
 529                         goto codec_dai_err;
 530                 }
 531
 532                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 533                         codec_dai->tx_mask = 0;
 534                 else
 535                         codec_dai->rx_mask = 0;
 536         }
 537
 538         if (rtd->dai_link->ops->startup) {
 539                 ret = rtd->dai_link->ops->startup(substream);
 540                 if (ret < 0) {
 541                         pr_err("ASoC: %s startup failed: %d\n",
 542                                rtd->dai_link->name, ret);
 543                         goto machine_err;
 544                 }
 545         }
 546
 547         /* Dynamic PCM DAI links compat checks use dynamic capabilities */
 548         if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
 549                 goto dynamic;
 550
 551         /* Check that the codec and cpu DAIs are compatible */
 552         soc_pcm_init_runtime_hw(substream);
 553
 554         if (rtd->num_codecs == 1)
 555                 codec_dai_name = rtd->codec_dai->name;
 556
 557         if (soc_pcm_has_symmetry(substream))
 558                 runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
 559
 560         ret = -EINVAL;
 561         if (!runtime->hw.rates) {
 562                 printk(KERN_ERR "ASoC: %s <-> %s No matching rates\n",
 563                         codec_dai_name, cpu_dai->name);
 564                 goto config_err;
 565         }
 566         if (!runtime->hw.formats) {
 567                 printk(KERN_ERR "ASoC: %s <-> %s No matching formats\n",
 568                         codec_dai_name, cpu_dai->name);
 569                 goto config_err;
 570         }
 571         if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
 572             runtime->hw.channels_min > runtime->hw.channels_max) {
 573                 printk(KERN_ERR "ASoC: %s <-> %s No matching channels\n",
 574                                 codec_dai_name, cpu_dai->name);
 575                 goto config_err;
 576         }
 577
 578         soc_pcm_apply_msb(substream);
 579
 580         /* Symmetry only applies if we've already got an active stream. */
 581         if (cpu_dai->active) {
 582                 ret = soc_pcm_apply_symmetry(substream, cpu_dai);
 583                 if (ret != 0)
 584                         goto config_err;
 585         }
 586
 587         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 588                 if (codec_dai->active) {
 589                         ret = soc_pcm_apply_symmetry(substream, codec_dai);
 590                         if (ret != 0)
 591                                 goto config_err;
 592                 }
 593         }
 594
 595         pr_debug("ASoC: %s <-> %s info:\n",
 596                         codec_dai_name, cpu_dai->name);
 597         pr_debug("ASoC: rate mask 0x%x\n", runtime->hw.rates);
 598         pr_debug("ASoC: min ch %d max ch %d\n", runtime->hw.channels_min,
 599                  runtime->hw.channels_max);
 600         pr_debug("ASoC: min rate %d max rate %d\n", runtime->hw.rate_min,
 601                  runtime->hw.rate_max);
 602
 603 dynamic:
 604
 605         snd_soc_runtime_activate(rtd, substream->stream);
 606
 607         mutex_unlock(&rtd->card->pcm_mutex);
 608         return 0;
 609
 610 config_err:
 611         if (rtd->dai_link->ops->shutdown)
 612                 rtd->dai_link->ops->shutdown(substream);
 613
 614 machine_err:
 615         i = rtd->num_codecs;
 616
 617 codec_dai_err:
 618         for_each_rtd_codec_dai_rollback(rtd, i, codec_dai)
 619                 snd_soc_dai_shutdown(codec_dai, substream);
 620
 621 component_err:
 622         soc_pcm_components_close(substream, component);
 623
 624         snd_soc_dai_shutdown(cpu_dai, substream);
 625 out:
 626         mutex_unlock(&rtd->card->pcm_mutex);
 627
 628         for_each_rtdcom(rtd, rtdcom) {
 629                 component = rtdcom->component;
 630
 631                 pm_runtime_mark_last_busy(component->dev);
 632                 pm_runtime_put_autosuspend(component->dev);
 633         }
 634
 635         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 636                 if (!codec_dai->active)
 637                         pinctrl_pm_select_sleep_state(codec_dai->dev);
 638         }
 639         if (!cpu_dai->active)
 640                 pinctrl_pm_select_sleep_state(cpu_dai->dev);
 641
 642         return ret;
 643 }
 644
 645 /*
 646  * Power down the audio subsystem pmdown_time msecs after close is called.
 647  * This is to ensure there are no pops or clicks in between any music tracks
 648  * due to DAPM power cycling.
 649  */
 650 static void close_delayed_work(struct work_struct *work)
 651 {
 652         struct snd_soc_pcm_runtime *rtd =
 653                         container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
 654         struct snd_soc_dai *codec_dai = rtd->codec_dais[0];
 655
 656         mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
 657
 658         dev_dbg(rtd->dev, "ASoC: pop wq checking: %s status: %s waiting: %s\n",
 659                  codec_dai->driver->playback.stream_name,
 660                  codec_dai->playback_active ? "active" : "inactive",
 661                  rtd->pop_wait ? "yes" : "no");
 662
 663         /* are we waiting on this codec DAI stream */
 664         if (rtd->pop_wait == 1) {
 665                 rtd->pop_wait = 0;
 666                 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
 667                                           SND_SOC_DAPM_STREAM_STOP);
 668         }
 669
 670         mutex_unlock(&rtd->card->pcm_mutex);
 671 }
 672
 673 static void codec2codec_close_delayed_work(struct work_struct *work)
 674 {
 675         /*
 676          * Currently nothing to do for c2c links
 677          * Since c2c links are internal nodes in the DAPM graph and
 678          * don't interface with the outside world or application layer
 679          * we don't have to do any special handling on close.
 680          */
 681 }
 682
 683 /*
 684  * Called by ALSA when a PCM substream is closed. Private data can be
 685  * freed here. The cpu DAI, codec DAI, machine and components are also
 686  * shutdown.
 687  */
 688 static int soc_pcm_close(struct snd_pcm_substream *substream)
 689 {
 690         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 691         struct snd_soc_component *component;
 692         struct snd_soc_rtdcom_list *rtdcom;
 693         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 694         struct snd_soc_dai *codec_dai;
 695         int i;
 696
 697         mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
 698
 699         snd_soc_runtime_deactivate(rtd, substream->stream);
 700
 701         /* clear the corresponding DAIs rate when inactive */
 702         if (!cpu_dai->active)
 703                 cpu_dai->rate = 0;
 704
 705         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 706                 if (!codec_dai->active)
 707                         codec_dai->rate = 0;
 708         }
 709
 710         snd_soc_dai_digital_mute(cpu_dai, 1, substream->stream);
 711
 712         snd_soc_dai_shutdown(cpu_dai, substream);
 713
 714         for_each_rtd_codec_dai(rtd, i, codec_dai)
 715                 snd_soc_dai_shutdown(codec_dai, substream);
 716
 717         if (rtd->dai_link->ops->shutdown)
 718                 rtd->dai_link->ops->shutdown(substream);
 719
 720         soc_pcm_components_close(substream, NULL);
 721
 722         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 723                 if (snd_soc_runtime_ignore_pmdown_time(rtd)) {
 724                         /* powered down playback stream now */
 725                         snd_soc_dapm_stream_event(rtd,
 726                                                   SNDRV_PCM_STREAM_PLAYBACK,
 727                                                   SND_SOC_DAPM_STREAM_STOP);
 728                 } else {
 729                         /* start delayed pop wq here for playback streams */
 730                         rtd->pop_wait = 1;
 731                         queue_delayed_work(system_power_efficient_wq,
 732                                            &rtd->delayed_work,
 733                                            msecs_to_jiffies(rtd->pmdown_time));
 734                 }
 735         } else {
 736                 /* capture streams can be powered down now */
 737                 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
 738                                           SND_SOC_DAPM_STREAM_STOP);
 739         }
 740
 741         mutex_unlock(&rtd->card->pcm_mutex);
 742
 743         for_each_rtdcom(rtd, rtdcom) {
 744                 component = rtdcom->component;
 745
 746                 pm_runtime_mark_last_busy(component->dev);
 747                 pm_runtime_put_autosuspend(component->dev);
 748         }
 749
 750         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 751                 if (!codec_dai->active)
 752                         pinctrl_pm_select_sleep_state(codec_dai->dev);
 753         }
 754         if (!cpu_dai->active)
 755                 pinctrl_pm_select_sleep_state(cpu_dai->dev);
 756
 757         return 0;
 758 }
 759
 760 /*
 761  * Called by ALSA when the PCM substream is prepared, can set format, sample
 762  * rate, etc.  This function is non atomic and can be called multiple times,
 763  * it can refer to the runtime info.
 764  */
 765 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
 766 {
 767         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 768         struct snd_soc_component *component;
 769         struct snd_soc_rtdcom_list *rtdcom;
 770         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 771         struct snd_soc_dai *codec_dai;
 772         int i, ret = 0;
 773
 774         mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
 775
 776         if (rtd->dai_link->ops->prepare) {
 777                 ret = rtd->dai_link->ops->prepare(substream);
 778                 if (ret < 0) {
 779                         dev_err(rtd->card->dev, "ASoC: machine prepare error:"
 780                                 " %d\n", ret);
 781                         goto out;
 782                 }
 783         }
 784
 785         for_each_rtdcom(rtd, rtdcom) {
 786                 component = rtdcom->component;
 787
 788                 ret = snd_soc_component_prepare(component, substream);
 789                 if (ret < 0) {
 790                         dev_err(component->dev,
 791                                 "ASoC: platform prepare error: %d\n", ret);
 792                         goto out;
 793                 }
 794         }
 795
 796         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 797                 ret = snd_soc_dai_prepare(codec_dai, substream);
 798                 if (ret < 0) {
 799                         dev_err(codec_dai->dev,
 800                                 "ASoC: codec DAI prepare error: %d\n",
 801                                 ret);
 802                         goto out;
 803                 }
 804         }
 805
 806         ret = snd_soc_dai_prepare(cpu_dai, substream);
 807         if (ret < 0) {
 808                 dev_err(cpu_dai->dev,
 809                         "ASoC: cpu DAI prepare error: %d\n", ret);
 810                 goto out;
 811         }
 812
 813         /* cancel any delayed stream shutdown that is pending */
 814         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 815             rtd->pop_wait) {
 816                 rtd->pop_wait = 0;
 817                 cancel_delayed_work(&rtd->delayed_work);
 818         }
 819
 820         snd_soc_dapm_stream_event(rtd, substream->stream,
 821                         SND_SOC_DAPM_STREAM_START);
 822
 823         for_each_rtd_codec_dai(rtd, i, codec_dai)
 824                 snd_soc_dai_digital_mute(codec_dai, 0,
 825                                          substream->stream);
 826         snd_soc_dai_digital_mute(cpu_dai, 0, substream->stream);
 827
 828 out:
 829         mutex_unlock(&rtd->card->pcm_mutex);
 830         return ret;
 831 }
 832
 833 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params,
 834                                        unsigned int mask)
 835 {
 836         struct snd_interval *interval;
 837         int channels = hweight_long(mask);
 838
 839         interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
 840         interval->min = channels;
 841         interval->max = channels;
 842 }
 843
 844 static int soc_pcm_components_hw_free(struct snd_pcm_substream *substream,
 845                                       struct snd_soc_component *last)
 846 {
 847         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 848         struct snd_soc_rtdcom_list *rtdcom;
 849         struct snd_soc_component *component;
 850         int ret = 0;
 851
 852         for_each_rtdcom(rtd, rtdcom) {
 853                 component = rtdcom->component;
 854
 855                 if (component == last)
 856                         break;
 857
 858                 ret |= snd_soc_component_hw_free(component, substream);
 859         }
 860
 861         return ret;
 862 }
 863
 864 /*
 865  * Called by ALSA when the hardware params are set by application. This
 866  * function can also be called multiple times and can allocate buffers
 867  * (using snd_pcm_lib_* ). It's non-atomic.
 868  */
 869 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
 870                                 struct snd_pcm_hw_params *params)
 871 {
 872         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 873         struct snd_soc_component *component;
 874         struct snd_soc_rtdcom_list *rtdcom;
 875         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 876         struct snd_soc_dai *codec_dai;
 877         int i, ret = 0;
 878
 879         mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
 880         if (rtd->dai_link->ops->hw_params) {
 881                 ret = rtd->dai_link->ops->hw_params(substream, params);
 882                 if (ret < 0) {
 883                         dev_err(rtd->card->dev, "ASoC: machine hw_params"
 884                                 " failed: %d\n", ret);
 885                         goto out;
 886                 }
 887         }
 888
 889         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 890                 struct snd_pcm_hw_params codec_params;
 891
 892                 /*
 893                  * Skip CODECs which don't support the current stream type,
 894                  * the idea being that if a CODEC is not used for the currently
 895                  * set up transfer direction, it should not need to be
 896                  * configured, especially since the configuration used might
 897                  * not even be supported by that CODEC. There may be cases
 898                  * however where a CODEC needs to be set up although it is
 899                  * actually not being used for the transfer, e.g. if a
 900                  * capture-only CODEC is acting as an LRCLK and/or BCLK master
 901                  * for the DAI link including a playback-only CODEC.
 902                  * If this becomes necessary, we will have to augment the
 903                  * machine driver setup with information on how to act, so
 904                  * we can do the right thing here.
 905                  */
 906                 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
 907                         continue;
 908
 909                 /* copy params for each codec */
 910                 codec_params = *params;
 911
 912                 /* fixup params based on TDM slot masks */
 913                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 914                     codec_dai->tx_mask)
 915                         soc_pcm_codec_params_fixup(&codec_params,
 916                                                    codec_dai->tx_mask);
 917
 918                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE &&
 919                     codec_dai->rx_mask)
 920                         soc_pcm_codec_params_fixup(&codec_params,
 921                                                    codec_dai->rx_mask);
 922
 923                 ret = snd_soc_dai_hw_params(codec_dai, substream,
 924                                             &codec_params);
 925                 if(ret < 0)
 926                         goto codec_err;
 927
 928                 codec_dai->rate = params_rate(&codec_params);
 929                 codec_dai->channels = params_channels(&codec_params);
 930                 codec_dai->sample_bits = snd_pcm_format_physical_width(
 931                                                 params_format(&codec_params));
 932
 933                 snd_soc_dapm_update_dai(substream, &codec_params, codec_dai);
 934         }
 935
 936         ret = snd_soc_dai_hw_params(cpu_dai, substream, params);
 937         if (ret < 0)
 938                 goto interface_err;
 939
 940         /* store the parameters for each DAIs */
 941         cpu_dai->rate = params_rate(params);
 942         cpu_dai->channels = params_channels(params);
 943         cpu_dai->sample_bits =
 944                 snd_pcm_format_physical_width(params_format(params));
 945
 946         snd_soc_dapm_update_dai(substream, params, cpu_dai);
 947
 948         for_each_rtdcom(rtd, rtdcom) {
 949                 component = rtdcom->component;
 950
 951                 ret = snd_soc_component_hw_params(component, substream, params);
 952                 if (ret < 0) {
 953                         dev_err(component->dev,
 954                                 "ASoC: %s hw params failed: %d\n",
 955                                 component->name, ret);
 956                         goto component_err;
 957                 }
 958         }
 959         component = NULL;
 960
 961         ret = soc_pcm_params_symmetry(substream, params);
 962         if (ret)
 963                 goto component_err;
 964 out:
 965         mutex_unlock(&rtd->card->pcm_mutex);
 966         return ret;
 967
 968 component_err:
 969         soc_pcm_components_hw_free(substream, component);
 970
 971         snd_soc_dai_hw_free(cpu_dai, substream);
 972         cpu_dai->rate = 0;
 973
 974 interface_err:
 975         i = rtd->num_codecs;
 976
 977 codec_err:
 978         for_each_rtd_codec_dai_rollback(rtd, i, codec_dai) {
 979                 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
 980                         continue;
 981
 982                 snd_soc_dai_hw_free(codec_dai, substream);
 983                 codec_dai->rate = 0;
 984         }
 985
 986         if (rtd->dai_link->ops->hw_free)
 987                 rtd->dai_link->ops->hw_free(substream);
 988
 989         mutex_unlock(&rtd->card->pcm_mutex);
 990         return ret;
 991 }
 992
 993 /*
 994  * Frees resources allocated by hw_params, can be called multiple times
 995  */
 996 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
 997 {
 998         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 999         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1000         struct snd_soc_dai *codec_dai;
1001         bool playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
1002         int i;
1003
1004         mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
1005
1006         /* clear the corresponding DAIs parameters when going to be inactive */
1007         if (cpu_dai->active == 1) {
1008                 cpu_dai->rate = 0;
1009                 cpu_dai->channels = 0;
1010                 cpu_dai->sample_bits = 0;
1011         }
1012
1013         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1014                 if (codec_dai->active == 1) {
1015                         codec_dai->rate = 0;
1016                         codec_dai->channels = 0;
1017                         codec_dai->sample_bits = 0;
1018                 }
1019         }
1020
1021         /* apply codec digital mute */
1022         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1023                 if ((playback && codec_dai->playback_active == 1) ||
1024                     (!playback && codec_dai->capture_active == 1))
1025                         snd_soc_dai_digital_mute(codec_dai, 1,
1026                                                  substream->stream);
1027         }
1028
1029         /* free any machine hw params */
1030         if (rtd->dai_link->ops->hw_free)
1031                 rtd->dai_link->ops->hw_free(substream);
1032
1033         /* free any component resources */
1034         soc_pcm_components_hw_free(substream, NULL);
1035
1036         /* now free hw params for the DAIs  */
1037         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1038                 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
1039                         continue;
1040
1041                 snd_soc_dai_hw_free(codec_dai, substream);
1042         }
1043
1044         snd_soc_dai_hw_free(cpu_dai, substream);
1045
1046         mutex_unlock(&rtd->card->pcm_mutex);
1047         return 0;
1048 }
1049
1050 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
1051 {
1052         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1053         struct snd_soc_component *component;
1054         struct snd_soc_rtdcom_list *rtdcom;
1055         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1056         struct snd_soc_dai *codec_dai;
1057         int i, ret;
1058
1059         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1060                 ret = snd_soc_dai_trigger(codec_dai, substream, cmd);
1061                 if (ret < 0)
1062                         return ret;
1063         }
1064
1065         for_each_rtdcom(rtd, rtdcom) {
1066                 component = rtdcom->component;
1067
1068                 ret = snd_soc_component_trigger(component, substream, cmd);
1069                 if (ret < 0)
1070                         return ret;
1071         }
1072
1073         snd_soc_dai_trigger(cpu_dai, substream, cmd);
1074         if (ret < 0)
1075                 return ret;
1076
1077         if (rtd->dai_link->ops->trigger) {
1078                 ret = rtd->dai_link->ops->trigger(substream, cmd);
1079                 if (ret < 0)
1080                         return ret;
1081         }
1082
1083         return 0;
1084 }
1085
1086 static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
1087                                    int cmd)
1088 {
1089         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1090         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1091         struct snd_soc_dai *codec_dai;
1092         int i, ret;
1093
1094         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1095                 ret = snd_soc_dai_bespoke_trigger(codec_dai, substream, cmd);
1096                 if (ret < 0)
1097                         return ret;
1098         }
1099
1100         snd_soc_dai_bespoke_trigger(cpu_dai, substream, cmd);
1101         if (ret < 0)
1102                 return ret;
1103
1104         return 0;
1105 }
1106 /*
1107  * soc level wrapper for pointer callback
1108  * If cpu_dai, codec_dai, component driver has the delay callback, then
1109  * the runtime->delay will be updated accordingly.
1110  */
1111 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1112 {
1113         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1114         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1115         struct snd_soc_dai *codec_dai;
1116         struct snd_pcm_runtime *runtime = substream->runtime;
1117         snd_pcm_uframes_t offset = 0;
1118         snd_pcm_sframes_t delay = 0;
1119         snd_pcm_sframes_t codec_delay = 0;
1120         int i;
1121
1122         /* clearing the previous total delay */
1123         runtime->delay = 0;
1124
1125         offset = snd_soc_pcm_component_pointer(substream);
1126
1127         /* base delay if assigned in pointer callback */
1128         delay = runtime->delay;
1129
1130         delay += snd_soc_dai_delay(cpu_dai, substream);
1131
1132         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1133                 codec_delay = max(codec_delay,
1134                                   snd_soc_dai_delay(codec_dai, substream));
1135         }
1136         delay += codec_delay;
1137
1138         runtime->delay = delay;
1139
1140         return offset;
1141 }
1142
1143 /* connect a FE and BE */
1144 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1145                 struct snd_soc_pcm_runtime *be, int stream)
1146 {
1147         struct snd_soc_dpcm *dpcm;
1148         unsigned long flags;
1149
1150         /* only add new dpcms */
1151         for_each_dpcm_be(fe, stream, dpcm) {
1152                 if (dpcm->be == be && dpcm->fe == fe)
1153                         return 0;
1154         }
1155
1156         dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1157         if (!dpcm)
1158                 return -ENOMEM;
1159
1160         dpcm->be = be;
1161         dpcm->fe = fe;
1162         be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
1163         dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1164         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1165         list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1166         list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1167         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1168
1169         dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1170                         stream ? "capture" : "playback",  fe->dai_link->name,
1171                         stream ? "<-" : "->", be->dai_link->name);
1172
1173 #ifdef CONFIG_DEBUG_FS
1174         dpcm->debugfs_state = debugfs_create_dir(be->dai_link->name,
1175                                                  fe->debugfs_dpcm_root);
1176         debugfs_create_u32("state", 0644, dpcm->debugfs_state, &dpcm->state);
1177 #endif
1178         return 1;
1179 }
1180
1181 /* reparent a BE onto another FE */
1182 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1183                         struct snd_soc_pcm_runtime *be, int stream)
1184 {
1185         struct snd_soc_dpcm *dpcm;
1186         struct snd_pcm_substream *fe_substream, *be_substream;
1187
1188         /* reparent if BE is connected to other FEs */
1189         if (!be->dpcm[stream].users)
1190                 return;
1191
1192         be_substream = snd_soc_dpcm_get_substream(be, stream);
1193
1194         for_each_dpcm_fe(be, stream, dpcm) {
1195                 if (dpcm->fe == fe)
1196                         continue;
1197
1198                 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1199                         stream ? "capture" : "playback",
1200                         dpcm->fe->dai_link->name,
1201                         stream ? "<-" : "->", dpcm->be->dai_link->name);
1202
1203                 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1204                 be_substream->runtime = fe_substream->runtime;
1205                 break;
1206         }
1207 }
1208
1209 /* disconnect a BE and FE */
1210 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1211 {
1212         struct snd_soc_dpcm *dpcm, *d;
1213         unsigned long flags;
1214
1215         for_each_dpcm_be_safe(fe, stream, dpcm, d) {
1216                 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1217                                 stream ? "capture" : "playback",
1218                                 dpcm->be->dai_link->name);
1219
1220                 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1221                         continue;
1222
1223                 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1224                         stream ? "capture" : "playback", fe->dai_link->name,
1225                         stream ? "<-" : "->", dpcm->be->dai_link->name);
1226
1227                 /* BEs still alive need new FE */
1228                 dpcm_be_reparent(fe, dpcm->be, stream);
1229
1230 #ifdef CONFIG_DEBUG_FS
1231                 debugfs_remove_recursive(dpcm->debugfs_state);
1232 #endif
1233                 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1234                 list_del(&dpcm->list_be);
1235                 list_del(&dpcm->list_fe);
1236                 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1237                 kfree(dpcm);
1238         }
1239 }
1240
1241 /* get BE for DAI widget and stream */
1242 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1243                 struct snd_soc_dapm_widget *widget, int stream)
1244 {
1245         struct snd_soc_pcm_runtime *be;
1246         struct snd_soc_dai *dai;
1247         int i;
1248
1249         dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name);
1250
1251         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1252                 for_each_card_rtds(card, be) {
1253
1254                         if (!be->dai_link->no_pcm)
1255                                 continue;
1256
1257                         dev_dbg(card->dev, "ASoC: try BE : %s\n",
1258                                 be->cpu_dai->playback_widget ?
1259                                 be->cpu_dai->playback_widget->name : "(not set)");
1260
1261                         if (be->cpu_dai->playback_widget == widget)
1262                                 return be;
1263
1264                         for_each_rtd_codec_dai(be, i, dai) {
1265                                 if (dai->playback_widget == widget)
1266                                         return be;
1267                         }
1268                 }
1269         } else {
1270
1271                 for_each_card_rtds(card, be) {
1272
1273                         if (!be->dai_link->no_pcm)
1274                                 continue;
1275
1276                         dev_dbg(card->dev, "ASoC: try BE %s\n",
1277                                 be->cpu_dai->capture_widget ?
1278                                 be->cpu_dai->capture_widget->name : "(not set)");
1279
1280                         if (be->cpu_dai->capture_widget == widget)
1281                                 return be;
1282
1283                         for_each_rtd_codec_dai(be, i, dai) {
1284                                 if (dai->capture_widget == widget)
1285                                         return be;
1286                         }
1287                 }
1288         }
1289
1290         /* dai link name and stream name set correctly ? */
1291         dev_err(card->dev, "ASoC: can't get %s BE for %s\n",
1292                 stream ? "capture" : "playback", widget->name);
1293         return NULL;
1294 }
1295
1296 static inline struct snd_soc_dapm_widget *
1297         dai_get_widget(struct snd_soc_dai *dai, int stream)
1298 {
1299         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1300                 return dai->playback_widget;
1301         else
1302                 return dai->capture_widget;
1303 }
1304
1305 static int widget_in_list(struct snd_soc_dapm_widget_list *list,
1306                 struct snd_soc_dapm_widget *widget)
1307 {
1308         int i;
1309
1310         for (i = 0; i < list->num_widgets; i++) {
1311                 if (widget == list->widgets[i])
1312                         return 1;
1313         }
1314
1315         return 0;
1316 }
1317
1318 static bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget,
1319                 enum snd_soc_dapm_direction dir)
1320 {
1321         struct snd_soc_card *card = widget->dapm->card;
1322         struct snd_soc_pcm_runtime *rtd;
1323         struct snd_soc_dai *dai;
1324         int i;
1325
1326         if (dir == SND_SOC_DAPM_DIR_OUT) {
1327                 for_each_card_rtds(card, rtd) {
1328                         if (!rtd->dai_link->no_pcm)
1329                                 continue;
1330
1331                         if (rtd->cpu_dai->playback_widget == widget)
1332                                 return true;
1333
1334                         for_each_rtd_codec_dai(rtd, i, dai) {
1335                                 if (dai->playback_widget == widget)
1336                                         return true;
1337                         }
1338                 }
1339         } else { /* SND_SOC_DAPM_DIR_IN */
1340                 for_each_card_rtds(card, rtd) {
1341                         if (!rtd->dai_link->no_pcm)
1342                                 continue;
1343
1344                         if (rtd->cpu_dai->capture_widget == widget)
1345                                 return true;
1346
1347                         for_each_rtd_codec_dai(rtd, i, dai) {
1348                                 if (dai->capture_widget == widget)
1349                                         return true;
1350                         }
1351                 }
1352         }
1353
1354         return false;
1355 }
1356
1357 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1358         int stream, struct snd_soc_dapm_widget_list **list)
1359 {
1360         struct snd_soc_dai *cpu_dai = fe->cpu_dai;
1361         int paths;
1362
1363         /* get number of valid DAI paths and their widgets */
1364         paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
1365                         dpcm_end_walk_at_be);
1366
1367         dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1368                         stream ? "capture" : "playback");
1369
1370         return paths;
1371 }
1372
1373 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1374         struct snd_soc_dapm_widget_list **list_)
1375 {
1376         struct snd_soc_dpcm *dpcm;
1377         struct snd_soc_dapm_widget_list *list = *list_;
1378         struct snd_soc_dapm_widget *widget;
1379         struct snd_soc_dai *dai;
1380         int prune = 0;
1381
1382         /* Destroy any old FE <--> BE connections */
1383         for_each_dpcm_be(fe, stream, dpcm) {
1384                 unsigned int i;
1385
1386                 /* is there a valid CPU DAI widget for this BE */
1387                 widget = dai_get_widget(dpcm->be->cpu_dai, stream);
1388
1389                 /* prune the BE if it's no longer in our active list */
1390                 if (widget && widget_in_list(list, widget))
1391                         continue;
1392
1393                 /* is there a valid CODEC DAI widget for this BE */
1394                 for_each_rtd_codec_dai(dpcm->be, i, dai) {
1395                         widget = dai_get_widget(dai, stream);
1396
1397                         /* prune the BE if it's no longer in our active list */
1398                         if (widget && widget_in_list(list, widget))
1399                                 continue;
1400                 }
1401
1402                 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1403                         stream ? "capture" : "playback",
1404                         dpcm->be->dai_link->name, fe->dai_link->name);
1405                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1406                 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1407                 prune++;
1408         }
1409
1410         dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1411         return prune;
1412 }
1413
1414 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1415         struct snd_soc_dapm_widget_list **list_)
1416 {
1417         struct snd_soc_card *card = fe->card;
1418         struct snd_soc_dapm_widget_list *list = *list_;
1419         struct snd_soc_pcm_runtime *be;
1420         int i, new = 0, err;
1421
1422         /* Create any new FE <--> BE connections */
1423         for (i = 0; i < list->num_widgets; i++) {
1424
1425                 switch (list->widgets[i]->id) {
1426                 case snd_soc_dapm_dai_in:
1427                         if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1428                                 continue;
1429                         break;
1430                 case snd_soc_dapm_dai_out:
1431                         if (stream != SNDRV_PCM_STREAM_CAPTURE)
1432                                 continue;
1433                         break;
1434                 default:
1435                         continue;
1436                 }
1437
1438                 /* is there a valid BE rtd for this widget */
1439                 be = dpcm_get_be(card, list->widgets[i], stream);
1440                 if (!be) {
1441                         dev_err(fe->dev, "ASoC: no BE found for %s\n",
1442                                         list->widgets[i]->name);
1443                         continue;
1444                 }
1445
1446                 /* make sure BE is a real BE */
1447                 if (!be->dai_link->no_pcm)
1448                         continue;
1449
1450                 /* don't connect if FE is not running */
1451                 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
1452                         continue;
1453
1454                 /* newly connected FE and BE */
1455                 err = dpcm_be_connect(fe, be, stream);
1456                 if (err < 0) {
1457                         dev_err(fe->dev, "ASoC: can't connect %s\n",
1458                                 list->widgets[i]->name);
1459                         break;
1460                 } else if (err == 0) /* already connected */
1461                         continue;
1462
1463                 /* new */
1464                 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1465                 new++;
1466         }
1467
1468         dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1469         return new;
1470 }
1471
1472 /*
1473  * Find the corresponding BE DAIs that source or sink audio to this
1474  * FE substream.
1475  */
1476 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1477         int stream, struct snd_soc_dapm_widget_list **list, int new)
1478 {
1479         if (new)
1480                 return dpcm_add_paths(fe, stream, list);
1481         else
1482                 return dpcm_prune_paths(fe, stream, list);
1483 }
1484
1485 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1486 {
1487         struct snd_soc_dpcm *dpcm;
1488         unsigned long flags;
1489
1490         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1491         for_each_dpcm_be(fe, stream, dpcm)
1492                 dpcm->be->dpcm[stream].runtime_update =
1493                                                 SND_SOC_DPCM_UPDATE_NO;
1494         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1495 }
1496
1497 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
1498         int stream)
1499 {
1500         struct snd_soc_dpcm *dpcm;
1501
1502         /* disable any enabled and non active backends */
1503         for_each_dpcm_be(fe, stream, dpcm) {
1504
1505                 struct snd_soc_pcm_runtime *be = dpcm->be;
1506                 struct snd_pcm_substream *be_substream =
1507                         snd_soc_dpcm_get_substream(be, stream);
1508
1509                 if (be->dpcm[stream].users == 0)
1510                         dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1511                                 stream ? "capture" : "playback",
1512                                 be->dpcm[stream].state);
1513
1514                 if (--be->dpcm[stream].users != 0)
1515                         continue;
1516
1517                 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1518                         continue;
1519
1520                 soc_pcm_close(be_substream);
1521                 be_substream->runtime = NULL;
1522                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1523         }
1524 }
1525
1526 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1527 {
1528         struct snd_soc_dpcm *dpcm;
1529         int err, count = 0;
1530
1531         /* only startup BE DAIs that are either sinks or sources to this FE DAI */
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_substream) {
1539                         dev_err(be->dev, "ASoC: no backend %s stream\n",
1540                                 stream ? "capture" : "playback");
1541                         continue;
1542                 }
1543
1544                 /* is this op for this BE ? */
1545                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1546                         continue;
1547
1548                 /* first time the dpcm is open ? */
1549                 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
1550                         dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1551                                 stream ? "capture" : "playback",
1552                                 be->dpcm[stream].state);
1553
1554                 if (be->dpcm[stream].users++ != 0)
1555                         continue;
1556
1557                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1558                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1559                         continue;
1560
1561                 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1562                         stream ? "capture" : "playback", be->dai_link->name);
1563
1564                 be_substream->runtime = be->dpcm[stream].runtime;
1565                 err = soc_pcm_open(be_substream);
1566                 if (err < 0) {
1567                         dev_err(be->dev, "ASoC: BE open failed %d\n", err);
1568                         be->dpcm[stream].users--;
1569                         if (be->dpcm[stream].users < 0)
1570                                 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1571                                         stream ? "capture" : "playback",
1572                                         be->dpcm[stream].state);
1573
1574                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1575                         goto unwind;
1576                 }
1577
1578                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1579                 count++;
1580         }
1581
1582         return count;
1583
1584 unwind:
1585         /* disable any enabled and non active backends */
1586         for_each_dpcm_be_rollback(fe, stream, dpcm) {
1587                 struct snd_soc_pcm_runtime *be = dpcm->be;
1588                 struct snd_pcm_substream *be_substream =
1589                         snd_soc_dpcm_get_substream(be, stream);
1590
1591                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1592                         continue;
1593
1594                 if (be->dpcm[stream].users == 0)
1595                         dev_err(be->dev, "ASoC: no users %s at close %d\n",
1596                                 stream ? "capture" : "playback",
1597                                 be->dpcm[stream].state);
1598
1599                 if (--be->dpcm[stream].users != 0)
1600                         continue;
1601
1602                 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1603                         continue;
1604
1605                 soc_pcm_close(be_substream);
1606                 be_substream->runtime = NULL;
1607                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1608         }
1609
1610         return err;
1611 }
1612
1613 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
1614                                  struct snd_soc_pcm_stream *stream)
1615 {
1616         runtime->hw.rate_min = stream->rate_min;
1617         runtime->hw.rate_max = min_not_zero(stream->rate_max, UINT_MAX);
1618         runtime->hw.channels_min = stream->channels_min;
1619         runtime->hw.channels_max = stream->channels_max;
1620         if (runtime->hw.formats)
1621                 runtime->hw.formats &= stream->formats;
1622         else
1623                 runtime->hw.formats = stream->formats;
1624         runtime->hw.rates = stream->rates;
1625 }
1626
1627 static void dpcm_runtime_merge_format(struct snd_pcm_substream *substream,
1628                                       u64 *formats)
1629 {
1630         struct snd_soc_pcm_runtime *fe = substream->private_data;
1631         struct snd_soc_dpcm *dpcm;
1632         struct snd_soc_dai *dai;
1633         int stream = substream->stream;
1634
1635         if (!fe->dai_link->dpcm_merged_format)
1636                 return;
1637
1638         /*
1639          * It returns merged BE codec format
1640          * if FE want to use it (= dpcm_merged_format)
1641          */
1642
1643         for_each_dpcm_be(fe, stream, dpcm) {
1644                 struct snd_soc_pcm_runtime *be = dpcm->be;
1645                 struct snd_soc_dai_driver *codec_dai_drv;
1646                 struct snd_soc_pcm_stream *codec_stream;
1647                 int i;
1648
1649                 for_each_rtd_codec_dai(be, i, dai) {
1650                         /*
1651                          * Skip CODECs which don't support the current stream
1652                          * type. See soc_pcm_init_runtime_hw() for more details
1653                          */
1654                         if (!snd_soc_dai_stream_valid(dai, stream))
1655                                 continue;
1656
1657                         codec_dai_drv = dai->driver;
1658                         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1659                                 codec_stream = &codec_dai_drv->playback;
1660                         else
1661                                 codec_stream = &codec_dai_drv->capture;
1662
1663                         *formats &= codec_stream->formats;
1664                 }
1665         }
1666 }
1667
1668 static void dpcm_runtime_merge_chan(struct snd_pcm_substream *substream,
1669                                     unsigned int *channels_min,
1670                                     unsigned int *channels_max)
1671 {
1672         struct snd_soc_pcm_runtime *fe = substream->private_data;
1673         struct snd_soc_dpcm *dpcm;
1674         int stream = substream->stream;
1675
1676         if (!fe->dai_link->dpcm_merged_chan)
1677                 return;
1678
1679         /*
1680          * It returns merged BE codec channel;
1681          * if FE want to use it (= dpcm_merged_chan)
1682          */
1683
1684         for_each_dpcm_be(fe, stream, dpcm) {
1685                 struct snd_soc_pcm_runtime *be = dpcm->be;
1686                 struct snd_soc_dai_driver *cpu_dai_drv =  be->cpu_dai->driver;
1687                 struct snd_soc_dai_driver *codec_dai_drv;
1688                 struct snd_soc_pcm_stream *codec_stream;
1689                 struct snd_soc_pcm_stream *cpu_stream;
1690
1691                 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1692                         cpu_stream = &cpu_dai_drv->playback;
1693                 else
1694                         cpu_stream = &cpu_dai_drv->capture;
1695
1696                 *channels_min = max(*channels_min, cpu_stream->channels_min);
1697                 *channels_max = min(*channels_max, cpu_stream->channels_max);
1698
1699                 /*
1700                  * chan min/max cannot be enforced if there are multiple CODEC
1701                  * DAIs connected to a single CPU DAI, use CPU DAI's directly
1702                  */
1703                 if (be->num_codecs == 1) {
1704                         codec_dai_drv = be->codec_dais[0]->driver;
1705
1706                         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1707                                 codec_stream = &codec_dai_drv->playback;
1708                         else
1709                                 codec_stream = &codec_dai_drv->capture;
1710
1711                         *channels_min = max(*channels_min,
1712                                             codec_stream->channels_min);
1713                         *channels_max = min(*channels_max,
1714                                             codec_stream->channels_max);
1715                 }
1716         }
1717 }
1718
1719 static void dpcm_runtime_merge_rate(struct snd_pcm_substream *substream,
1720                                     unsigned int *rates,
1721                                     unsigned int *rate_min,
1722                                     unsigned int *rate_max)
1723 {
1724         struct snd_soc_pcm_runtime *fe = substream->private_data;
1725         struct snd_soc_dpcm *dpcm;
1726         int stream = substream->stream;
1727
1728         if (!fe->dai_link->dpcm_merged_rate)
1729                 return;
1730
1731         /*
1732          * It returns merged BE codec channel;
1733          * if FE want to use it (= dpcm_merged_chan)
1734          */
1735
1736         for_each_dpcm_be(fe, stream, dpcm) {
1737                 struct snd_soc_pcm_runtime *be = dpcm->be;
1738                 struct snd_soc_dai_driver *cpu_dai_drv =  be->cpu_dai->driver;
1739                 struct snd_soc_dai_driver *codec_dai_drv;
1740                 struct snd_soc_pcm_stream *codec_stream;
1741                 struct snd_soc_pcm_stream *cpu_stream;
1742                 struct snd_soc_dai *dai;
1743                 int i;
1744
1745                 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1746                         cpu_stream = &cpu_dai_drv->playback;
1747                 else
1748                         cpu_stream = &cpu_dai_drv->capture;
1749
1750                 *rate_min = max(*rate_min, cpu_stream->rate_min);
1751                 *rate_max = min_not_zero(*rate_max, cpu_stream->rate_max);
1752                 *rates = snd_pcm_rate_mask_intersect(*rates, cpu_stream->rates);
1753
1754                 for_each_rtd_codec_dai(be, i, dai) {
1755                         /*
1756                          * Skip CODECs which don't support the current stream
1757                          * type. See soc_pcm_init_runtime_hw() for more details
1758                          */
1759                         if (!snd_soc_dai_stream_valid(dai, stream))
1760                                 continue;
1761
1762                         codec_dai_drv = dai->driver;
1763                         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1764                                 codec_stream = &codec_dai_drv->playback;
1765                         else
1766                                 codec_stream = &codec_dai_drv->capture;
1767
1768                         *rate_min = max(*rate_min, codec_stream->rate_min);
1769                         *rate_max = min_not_zero(*rate_max,
1770                                                  codec_stream->rate_max);
1771                         *rates = snd_pcm_rate_mask_intersect(*rates,
1772                                                 codec_stream->rates);
1773                 }
1774         }
1775 }
1776
1777 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
1778 {
1779         struct snd_pcm_runtime *runtime = substream->runtime;
1780         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1781         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1782         struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
1783
1784         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1785                 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback);
1786         else
1787                 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture);
1788
1789         dpcm_runtime_merge_format(substream, &runtime->hw.formats);
1790         dpcm_runtime_merge_chan(substream, &runtime->hw.channels_min,
1791                                 &runtime->hw.channels_max);
1792         dpcm_runtime_merge_rate(substream, &runtime->hw.rates,
1793                                 &runtime->hw.rate_min, &runtime->hw.rate_max);
1794 }
1795
1796 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
1797
1798 /* Set FE's runtime_update state; the state is protected via PCM stream lock
1799  * for avoiding the race with trigger callback.
1800  * If the state is unset and a trigger is pending while the previous operation,
1801  * process the pending trigger action here.
1802  */
1803 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
1804                                      int stream, enum snd_soc_dpcm_update state)
1805 {
1806         struct snd_pcm_substream *substream =
1807                 snd_soc_dpcm_get_substream(fe, stream);
1808
1809         snd_pcm_stream_lock_irq(substream);
1810         if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
1811                 dpcm_fe_dai_do_trigger(substream,
1812                                        fe->dpcm[stream].trigger_pending - 1);
1813                 fe->dpcm[stream].trigger_pending = 0;
1814         }
1815         fe->dpcm[stream].runtime_update = state;
1816         snd_pcm_stream_unlock_irq(substream);
1817 }
1818
1819 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
1820                                int stream)
1821 {
1822         struct snd_soc_dpcm *dpcm;
1823         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1824         struct snd_soc_dai *fe_cpu_dai = fe->cpu_dai;
1825         int err;
1826
1827         /* apply symmetry for FE */
1828         if (soc_pcm_has_symmetry(fe_substream))
1829                 fe_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1830
1831         /* Symmetry only applies if we've got an active stream. */
1832         if (fe_cpu_dai->active) {
1833                 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
1834                 if (err < 0)
1835                         return err;
1836         }
1837
1838         /* apply symmetry for BE */
1839         for_each_dpcm_be(fe, stream, dpcm) {
1840                 struct snd_soc_pcm_runtime *be = dpcm->be;
1841                 struct snd_pcm_substream *be_substream =
1842                         snd_soc_dpcm_get_substream(be, stream);
1843                 struct snd_soc_pcm_runtime *rtd;
1844                 struct snd_soc_dai *codec_dai;
1845                 int i;
1846
1847                 /* A backend may not have the requested substream */
1848                 if (!be_substream)
1849                         continue;
1850
1851                 rtd = be_substream->private_data;
1852                 if (rtd->dai_link->be_hw_params_fixup)
1853                         continue;
1854
1855                 if (soc_pcm_has_symmetry(be_substream))
1856                         be_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1857
1858                 /* Symmetry only applies if we've got an active stream. */
1859                 if (rtd->cpu_dai->active) {
1860                         err = soc_pcm_apply_symmetry(fe_substream,
1861                                                      rtd->cpu_dai);
1862                         if (err < 0)
1863                                 return err;
1864                 }
1865
1866                 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1867                         if (codec_dai->active) {
1868                                 err = soc_pcm_apply_symmetry(fe_substream,
1869                                                              codec_dai);
1870                                 if (err < 0)
1871                                         return err;
1872                         }
1873                 }
1874         }
1875
1876         return 0;
1877 }
1878
1879 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1880 {
1881         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1882         struct snd_pcm_runtime *runtime = fe_substream->runtime;
1883         int stream = fe_substream->stream, ret = 0;
1884
1885         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1886
1887         ret = dpcm_be_dai_startup(fe, fe_substream->stream);
1888         if (ret < 0) {
1889                 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
1890                 goto be_err;
1891         }
1892
1893         dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1894
1895         /* start the DAI frontend */
1896         ret = soc_pcm_open(fe_substream);
1897         if (ret < 0) {
1898                 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
1899                 goto unwind;
1900         }
1901
1902         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1903
1904         dpcm_set_fe_runtime(fe_substream);
1905         snd_pcm_limit_hw_rates(runtime);
1906
1907         ret = dpcm_apply_symmetry(fe_substream, stream);
1908         if (ret < 0) {
1909                 dev_err(fe->dev, "ASoC: failed to apply dpcm symmetry %d\n",
1910                         ret);
1911                 goto unwind;
1912         }
1913
1914         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1915         return 0;
1916
1917 unwind:
1918         dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
1919 be_err:
1920         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1921         return ret;
1922 }
1923
1924 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1925 {
1926         struct snd_soc_dpcm *dpcm;
1927
1928         /* only shutdown BEs that are either sinks or sources to this FE DAI */
1929         for_each_dpcm_be(fe, stream, dpcm) {
1930
1931                 struct snd_soc_pcm_runtime *be = dpcm->be;
1932                 struct snd_pcm_substream *be_substream =
1933                         snd_soc_dpcm_get_substream(be, stream);
1934
1935                 /* is this op for this BE ? */
1936                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1937                         continue;
1938
1939                 if (be->dpcm[stream].users == 0)
1940                         dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1941                                 stream ? "capture" : "playback",
1942                                 be->dpcm[stream].state);
1943
1944                 if (--be->dpcm[stream].users != 0)
1945                         continue;
1946
1947                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1948                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)) {
1949                         soc_pcm_hw_free(be_substream);
1950                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1951                 }
1952
1953                 dev_dbg(be->dev, "ASoC: close BE %s\n",
1954                         be->dai_link->name);
1955
1956                 soc_pcm_close(be_substream);
1957                 be_substream->runtime = NULL;
1958
1959                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1960         }
1961         return 0;
1962 }
1963
1964 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
1965 {
1966         struct snd_soc_pcm_runtime *fe = substream->private_data;
1967         int stream = substream->stream;
1968
1969         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1970
1971         /* shutdown the BEs */
1972         dpcm_be_dai_shutdown(fe, substream->stream);
1973
1974         dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
1975
1976         /* now shutdown the frontend */
1977         soc_pcm_close(substream);
1978
1979         /* run the stream event for each BE */
1980         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
1981
1982         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1983         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1984         return 0;
1985 }
1986
1987 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
1988 {
1989         struct snd_soc_dpcm *dpcm;
1990
1991         /* only hw_params backends that are either sinks or sources
1992          * to this frontend DAI */
1993         for_each_dpcm_be(fe, stream, dpcm) {
1994
1995                 struct snd_soc_pcm_runtime *be = dpcm->be;
1996                 struct snd_pcm_substream *be_substream =
1997                         snd_soc_dpcm_get_substream(be, stream);
1998
1999                 /* is this op for this BE ? */
2000                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2001                         continue;
2002
2003                 /* only free hw when no longer used - check all FEs */
2004                 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2005                                 continue;
2006
2007                 /* do not free hw if this BE is used by other FE */
2008                 if (be->dpcm[stream].users > 1)
2009                         continue;
2010
2011                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2012                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2013                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2014                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
2015                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2016                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2017                         continue;
2018
2019                 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
2020                         be->dai_link->name);
2021
2022                 soc_pcm_hw_free(be_substream);
2023
2024                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2025         }
2026
2027         return 0;
2028 }
2029
2030 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
2031 {
2032         struct snd_soc_pcm_runtime *fe = substream->private_data;
2033         int err, stream = substream->stream;
2034
2035         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2036         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2037
2038         dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
2039
2040         /* call hw_free on the frontend */
2041         err = soc_pcm_hw_free(substream);
2042         if (err < 0)
2043                 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
2044                         fe->dai_link->name);
2045
2046         /* only hw_params backends that are either sinks or sources
2047          * to this frontend DAI */
2048         err = dpcm_be_dai_hw_free(fe, stream);
2049
2050         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2051         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2052
2053         mutex_unlock(&fe->card->mutex);
2054         return 0;
2055 }
2056
2057 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
2058 {
2059         struct snd_soc_dpcm *dpcm;
2060         int ret;
2061
2062         for_each_dpcm_be(fe, stream, dpcm) {
2063
2064                 struct snd_soc_pcm_runtime *be = dpcm->be;
2065                 struct snd_pcm_substream *be_substream =
2066                         snd_soc_dpcm_get_substream(be, stream);
2067
2068                 /* is this op for this BE ? */
2069                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2070                         continue;
2071
2072                 /* copy params for each dpcm */
2073                 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
2074                                 sizeof(struct snd_pcm_hw_params));
2075
2076                 /* perform any hw_params fixups */
2077                 if (be->dai_link->be_hw_params_fixup) {
2078                         ret = be->dai_link->be_hw_params_fixup(be,
2079                                         &dpcm->hw_params);
2080                         if (ret < 0) {
2081                                 dev_err(be->dev,
2082                                         "ASoC: hw_params BE fixup failed %d\n",
2083                                         ret);
2084                                 goto unwind;
2085                         }
2086                 }
2087
2088                 /* copy the fixed-up hw params for BE dai */
2089                 memcpy(&be->dpcm[stream].hw_params, &dpcm->hw_params,
2090                        sizeof(struct snd_pcm_hw_params));
2091
2092                 /* only allow hw_params() if no connected FEs are running */
2093                 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
2094                         continue;
2095
2096                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2097                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2098                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
2099                         continue;
2100
2101                 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
2102                         be->dai_link->name);
2103
2104                 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
2105                 if (ret < 0) {
2106                         dev_err(dpcm->be->dev,
2107                                 "ASoC: hw_params BE failed %d\n", ret);
2108                         goto unwind;
2109                 }
2110
2111                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2112         }
2113         return 0;
2114
2115 unwind:
2116         /* disable any enabled and non active backends */
2117         for_each_dpcm_be_rollback(fe, stream, dpcm) {
2118                 struct snd_soc_pcm_runtime *be = dpcm->be;
2119                 struct snd_pcm_substream *be_substream =
2120                         snd_soc_dpcm_get_substream(be, stream);
2121
2122                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2123                         continue;
2124
2125                 /* only allow hw_free() if no connected FEs are running */
2126                 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2127                         continue;
2128
2129                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2130                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2131                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2132                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2133                         continue;
2134
2135                 soc_pcm_hw_free(be_substream);
2136         }
2137
2138         return ret;
2139 }
2140
2141 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
2142                                  struct snd_pcm_hw_params *params)
2143 {
2144         struct snd_soc_pcm_runtime *fe = substream->private_data;
2145         int ret, stream = substream->stream;
2146
2147         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2148         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2149
2150         memcpy(&fe->dpcm[substream->stream].hw_params, params,
2151                         sizeof(struct snd_pcm_hw_params));
2152         ret = dpcm_be_dai_hw_params(fe, substream->stream);
2153         if (ret < 0) {
2154                 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
2155                 goto out;
2156         }
2157
2158         dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
2159                         fe->dai_link->name, params_rate(params),
2160                         params_channels(params), params_format(params));
2161
2162         /* call hw_params on the frontend */
2163         ret = soc_pcm_hw_params(substream, params);
2164         if (ret < 0) {
2165                 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
2166                 dpcm_be_dai_hw_free(fe, stream);
2167          } else
2168                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2169
2170 out:
2171         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2172         mutex_unlock(&fe->card->mutex);
2173         return ret;
2174 }
2175
2176 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
2177                 struct snd_pcm_substream *substream, int cmd)
2178 {
2179         int ret;
2180
2181         dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n",
2182                         dpcm->be->dai_link->name, cmd);
2183
2184         ret = soc_pcm_trigger(substream, cmd);
2185         if (ret < 0)
2186                 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret);
2187
2188         return ret;
2189 }
2190
2191 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
2192                                int cmd)
2193 {
2194         struct snd_soc_dpcm *dpcm;
2195         int ret = 0;
2196
2197         for_each_dpcm_be(fe, stream, dpcm) {
2198
2199                 struct snd_soc_pcm_runtime *be = dpcm->be;
2200                 struct snd_pcm_substream *be_substream =
2201                         snd_soc_dpcm_get_substream(be, stream);
2202
2203                 /* is this op for this BE ? */
2204                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2205                         continue;
2206
2207                 switch (cmd) {
2208                 case SNDRV_PCM_TRIGGER_START:
2209                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2210                             (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2211                                 continue;
2212
2213                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2214                         if (ret)
2215                                 return ret;
2216
2217                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2218                         break;
2219                 case SNDRV_PCM_TRIGGER_RESUME:
2220                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2221                                 continue;
2222
2223                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2224                         if (ret)
2225                                 return ret;
2226
2227                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2228                         break;
2229                 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2230                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2231                                 continue;
2232
2233                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2234                         if (ret)
2235                                 return ret;
2236
2237                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2238                         break;
2239                 case SNDRV_PCM_TRIGGER_STOP:
2240                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2241                                 continue;
2242
2243                         if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2244                                 continue;
2245
2246                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2247                         if (ret)
2248                                 return ret;
2249
2250                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2251                         break;
2252                 case SNDRV_PCM_TRIGGER_SUSPEND:
2253                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2254                                 continue;
2255
2256                         if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2257                                 continue;
2258
2259                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2260                         if (ret)
2261                                 return ret;
2262
2263                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
2264                         break;
2265                 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2266                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2267                                 continue;
2268
2269                         if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2270                                 continue;
2271
2272                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2273                         if (ret)
2274                                 return ret;
2275
2276                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2277                         break;
2278                 }
2279         }
2280
2281         return ret;
2282 }
2283 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2284
2285 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
2286 {
2287         struct snd_soc_pcm_runtime *fe = substream->private_data;
2288         int stream = substream->stream, ret;
2289         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2290
2291         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2292
2293         switch (trigger) {
2294         case SND_SOC_DPCM_TRIGGER_PRE:
2295                 /* call trigger on the frontend before the backend. */
2296
2297                 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2298                                 fe->dai_link->name, cmd);
2299
2300                 ret = soc_pcm_trigger(substream, cmd);
2301                 if (ret < 0) {
2302                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2303                         goto out;
2304                 }
2305
2306                 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2307                 break;
2308         case SND_SOC_DPCM_TRIGGER_POST:
2309                 /* call trigger on the frontend after the backend. */
2310
2311                 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2312                 if (ret < 0) {
2313                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2314                         goto out;
2315                 }
2316
2317                 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2318                                 fe->dai_link->name, cmd);
2319
2320                 ret = soc_pcm_trigger(substream, cmd);
2321                 break;
2322         case SND_SOC_DPCM_TRIGGER_BESPOKE:
2323                 /* bespoke trigger() - handles both FE and BEs */
2324
2325                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
2326                                 fe->dai_link->name, cmd);
2327
2328                 ret = soc_pcm_bespoke_trigger(substream, cmd);
2329                 if (ret < 0) {
2330                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2331                         goto out;
2332                 }
2333                 break;
2334         default:
2335                 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
2336                                 fe->dai_link->name);
2337                 ret = -EINVAL;
2338                 goto out;
2339         }
2340
2341         switch (cmd) {
2342         case SNDRV_PCM_TRIGGER_START:
2343         case SNDRV_PCM_TRIGGER_RESUME:
2344         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2345                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2346                 break;
2347         case SNDRV_PCM_TRIGGER_STOP:
2348         case SNDRV_PCM_TRIGGER_SUSPEND:
2349                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2350                 break;
2351         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2352                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2353                 break;
2354         }
2355
2356 out:
2357         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2358         return ret;
2359 }
2360
2361 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2362 {
2363         struct snd_soc_pcm_runtime *fe = substream->private_data;
2364         int stream = substream->stream;
2365
2366         /* if FE's runtime_update is already set, we're in race;
2367          * process this trigger later at exit
2368          */
2369         if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2370                 fe->dpcm[stream].trigger_pending = cmd + 1;
2371                 return 0; /* delayed, assuming it's successful */
2372         }
2373
2374         /* we're alone, let's trigger */
2375         return dpcm_fe_dai_do_trigger(substream, cmd);
2376 }
2377
2378 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2379 {
2380         struct snd_soc_dpcm *dpcm;
2381         int ret = 0;
2382
2383         for_each_dpcm_be(fe, stream, dpcm) {
2384
2385                 struct snd_soc_pcm_runtime *be = dpcm->be;
2386                 struct snd_pcm_substream *be_substream =
2387                         snd_soc_dpcm_get_substream(be, stream);
2388
2389                 /* is this op for this BE ? */
2390                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2391                         continue;
2392
2393                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2394                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2395                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) &&
2396                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2397                         continue;
2398
2399                 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2400                         be->dai_link->name);
2401
2402                 ret = soc_pcm_prepare(be_substream);
2403                 if (ret < 0) {
2404                         dev_err(be->dev, "ASoC: backend prepare failed %d\n",
2405                                 ret);
2406                         break;
2407                 }
2408
2409                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2410         }
2411         return ret;
2412 }
2413
2414 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2415 {
2416         struct snd_soc_pcm_runtime *fe = substream->private_data;
2417         int stream = substream->stream, ret = 0;
2418
2419         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2420
2421         dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2422
2423         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2424
2425         /* there is no point preparing this FE if there are no BEs */
2426         if (list_empty(&fe->dpcm[stream].be_clients)) {
2427                 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2428                                 fe->dai_link->name);
2429                 ret = -EINVAL;
2430                 goto out;
2431         }
2432
2433         ret = dpcm_be_dai_prepare(fe, substream->stream);
2434         if (ret < 0)
2435                 goto out;
2436
2437         /* call prepare on the frontend */
2438         ret = soc_pcm_prepare(substream);
2439         if (ret < 0) {
2440                 dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
2441                         fe->dai_link->name);
2442                 goto out;
2443         }
2444
2445         /* run the stream event for each BE */
2446         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
2447         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2448
2449 out:
2450         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2451         mutex_unlock(&fe->card->mutex);
2452
2453         return ret;
2454 }
2455
2456 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2457 {
2458         struct snd_pcm_substream *substream =
2459                 snd_soc_dpcm_get_substream(fe, stream);
2460         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2461         int err;
2462
2463         dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2464                         stream ? "capture" : "playback", fe->dai_link->name);
2465
2466         if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2467                 /* call bespoke trigger - FE takes care of all BE triggers */
2468                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2469                                 fe->dai_link->name);
2470
2471                 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2472                 if (err < 0)
2473                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2474         } else {
2475                 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2476                         fe->dai_link->name);
2477
2478                 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2479                 if (err < 0)
2480                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2481         }
2482
2483         err = dpcm_be_dai_hw_free(fe, stream);
2484         if (err < 0)
2485                 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
2486
2487         err = dpcm_be_dai_shutdown(fe, stream);
2488         if (err < 0)
2489                 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
2490
2491         /* run the stream event for each BE */
2492         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2493
2494         return 0;
2495 }
2496
2497 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2498 {
2499         struct snd_pcm_substream *substream =
2500                 snd_soc_dpcm_get_substream(fe, stream);
2501         struct snd_soc_dpcm *dpcm;
2502         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2503         int ret;
2504         unsigned long flags;
2505
2506         dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2507                         stream ? "capture" : "playback", fe->dai_link->name);
2508
2509         /* Only start the BE if the FE is ready */
2510         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2511                 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
2512                 return -EINVAL;
2513
2514         /* startup must always be called for new BEs */
2515         ret = dpcm_be_dai_startup(fe, stream);
2516         if (ret < 0)
2517                 goto disconnect;
2518
2519         /* keep going if FE state is > open */
2520         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2521                 return 0;
2522
2523         ret = dpcm_be_dai_hw_params(fe, stream);
2524         if (ret < 0)
2525                 goto close;
2526
2527         /* keep going if FE state is > hw_params */
2528         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2529                 return 0;
2530
2531
2532         ret = dpcm_be_dai_prepare(fe, stream);
2533         if (ret < 0)
2534                 goto hw_free;
2535
2536         /* run the stream event for each BE */
2537         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2538
2539         /* keep going if FE state is > prepare */
2540         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2541                 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2542                 return 0;
2543
2544         if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2545                 /* call trigger on the frontend - FE takes care of all BE triggers */
2546                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
2547                                 fe->dai_link->name);
2548
2549                 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2550                 if (ret < 0) {
2551                         dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
2552                         goto hw_free;
2553                 }
2554         } else {
2555                 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2556                         fe->dai_link->name);
2557
2558                 ret = dpcm_be_dai_trigger(fe, stream,
2559                                         SNDRV_PCM_TRIGGER_START);
2560                 if (ret < 0) {
2561                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2562                         goto hw_free;
2563                 }
2564         }
2565
2566         return 0;
2567
2568 hw_free:
2569         dpcm_be_dai_hw_free(fe, stream);
2570 close:
2571         dpcm_be_dai_shutdown(fe, stream);
2572 disconnect:
2573         /* disconnect any non started BEs */
2574         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
2575         for_each_dpcm_be(fe, stream, dpcm) {
2576                 struct snd_soc_pcm_runtime *be = dpcm->be;
2577                 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2578                                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2579         }
2580         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
2581
2582         return ret;
2583 }
2584
2585 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
2586 {
2587         int ret;
2588
2589         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2590         ret = dpcm_run_update_startup(fe, stream);
2591         if (ret < 0)
2592                 dev_err(fe->dev, "ASoC: failed to startup some BEs\n");
2593         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2594
2595         return ret;
2596 }
2597
2598 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
2599 {
2600         int ret;
2601
2602         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2603         ret = dpcm_run_update_shutdown(fe, stream);
2604         if (ret < 0)
2605                 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
2606         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2607
2608         return ret;
2609 }
2610
2611 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new)
2612 {
2613         struct snd_soc_dapm_widget_list *list;
2614         int count, paths;
2615
2616         if (!fe->dai_link->dynamic)
2617                 return 0;
2618
2619         /* only check active links */
2620         if (!fe->cpu_dai->active)
2621                 return 0;
2622
2623         /* DAPM sync will call this to update DSP paths */
2624         dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n",
2625                 new ? "new" : "old", fe->dai_link->name);
2626
2627         /* skip if FE doesn't have playback capability */
2628         if (!snd_soc_dai_stream_valid(fe->cpu_dai,   SNDRV_PCM_STREAM_PLAYBACK) ||
2629             !snd_soc_dai_stream_valid(fe->codec_dai, SNDRV_PCM_STREAM_PLAYBACK))
2630                 goto capture;
2631
2632         /* skip if FE isn't currently playing */
2633         if (!fe->cpu_dai->playback_active || !fe->codec_dai->playback_active)
2634                 goto capture;
2635
2636         paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
2637         if (paths < 0) {
2638                 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2639                          fe->dai_link->name,  "playback");
2640                 return paths;
2641         }
2642
2643         /* update any playback paths */
2644         count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, new);
2645         if (count) {
2646                 if (new)
2647                         dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2648                 else
2649                         dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2650
2651                 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2652                 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2653         }
2654
2655         dpcm_path_put(&list);
2656
2657 capture:
2658         /* skip if FE doesn't have capture capability */
2659         if (!snd_soc_dai_stream_valid(fe->cpu_dai,   SNDRV_PCM_STREAM_CAPTURE) ||
2660             !snd_soc_dai_stream_valid(fe->codec_dai, SNDRV_PCM_STREAM_CAPTURE))
2661                 return 0;
2662
2663         /* skip if FE isn't currently capturing */
2664         if (!fe->cpu_dai->capture_active || !fe->codec_dai->capture_active)
2665                 return 0;
2666
2667         paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
2668         if (paths < 0) {
2669                 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2670                          fe->dai_link->name,  "capture");
2671                 return paths;
2672         }
2673
2674         /* update any old capture paths */
2675         count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, new);
2676         if (count) {
2677                 if (new)
2678                         dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2679                 else
2680                         dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2681
2682                 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2683                 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2684         }
2685
2686         dpcm_path_put(&list);
2687
2688         return 0;
2689 }
2690
2691 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2692  * any DAI links.
2693  */
2694 int soc_dpcm_runtime_update(struct snd_soc_card *card)
2695 {
2696         struct snd_soc_pcm_runtime *fe;
2697         int ret = 0;
2698
2699         mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2700         /* shutdown all old paths first */
2701         for_each_card_rtds(card, fe) {
2702                 ret = soc_dpcm_fe_runtime_update(fe, 0);
2703                 if (ret)
2704                         goto out;
2705         }
2706
2707         /* bring new paths up */
2708         for_each_card_rtds(card, fe) {
2709                 ret = soc_dpcm_fe_runtime_update(fe, 1);
2710                 if (ret)
2711                         goto out;
2712         }
2713
2714 out:
2715         mutex_unlock(&card->mutex);
2716         return ret;
2717 }
2718 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
2719 {
2720         struct snd_soc_dpcm *dpcm;
2721         struct snd_soc_dai *dai;
2722
2723         for_each_dpcm_be(fe, SNDRV_PCM_STREAM_PLAYBACK, dpcm) {
2724
2725                 struct snd_soc_pcm_runtime *be = dpcm->be;
2726                 int i;
2727
2728                 if (be->dai_link->ignore_suspend)
2729                         continue;
2730
2731                 for_each_rtd_codec_dai(be, i, dai) {
2732                         struct snd_soc_dai_driver *drv = dai->driver;
2733
2734                         dev_dbg(be->dev, "ASoC: BE digital mute %s\n",
2735                                          be->dai_link->name);
2736
2737                         if (drv->ops && drv->ops->digital_mute &&
2738                                                         dai->playback_active)
2739                                 drv->ops->digital_mute(dai, mute);
2740                 }
2741         }
2742
2743         return 0;
2744 }
2745
2746 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2747 {
2748         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2749         struct snd_soc_dpcm *dpcm;
2750         struct snd_soc_dapm_widget_list *list;
2751         int ret;
2752         int stream = fe_substream->stream;
2753
2754         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2755         fe->dpcm[stream].runtime = fe_substream->runtime;
2756
2757         ret = dpcm_path_get(fe, stream, &list);
2758         if (ret < 0) {
2759                 mutex_unlock(&fe->card->mutex);
2760                 return ret;
2761         } else if (ret == 0) {
2762                 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
2763                         fe->dai_link->name, stream ? "capture" : "playback");
2764         }
2765
2766         /* calculate valid and active FE <-> BE dpcms */
2767         dpcm_process_paths(fe, stream, &list, 1);
2768
2769         ret = dpcm_fe_dai_startup(fe_substream);
2770         if (ret < 0) {
2771                 /* clean up all links */
2772                 for_each_dpcm_be(fe, stream, dpcm)
2773                         dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2774
2775                 dpcm_be_disconnect(fe, stream);
2776                 fe->dpcm[stream].runtime = NULL;
2777         }
2778
2779         dpcm_clear_pending_state(fe, stream);
2780         dpcm_path_put(&list);
2781         mutex_unlock(&fe->card->mutex);
2782         return ret;
2783 }
2784
2785 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2786 {
2787         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2788         struct snd_soc_dpcm *dpcm;
2789         int stream = fe_substream->stream, ret;
2790
2791         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2792         ret = dpcm_fe_dai_shutdown(fe_substream);
2793
2794         /* mark FE's links ready to prune */
2795         for_each_dpcm_be(fe, stream, dpcm)
2796                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2797
2798         dpcm_be_disconnect(fe, stream);
2799
2800         fe->dpcm[stream].runtime = NULL;
2801         mutex_unlock(&fe->card->mutex);
2802         return ret;
2803 }
2804
2805 static void soc_pcm_private_free(struct snd_pcm *pcm)
2806 {
2807         struct snd_soc_pcm_runtime *rtd = pcm->private_data;
2808
2809         /* need to sync the delayed work before releasing resources */
2810         flush_delayed_work(&rtd->delayed_work);
2811         snd_soc_pcm_component_free(pcm);
2812 }
2813
2814 /* create a new pcm */
2815 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2816 {
2817         struct snd_soc_dai *codec_dai;
2818         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2819         struct snd_soc_rtdcom_list *rtdcom;
2820         struct snd_pcm *pcm;
2821         char new_name[64];
2822         int ret = 0, playback = 0, capture = 0;
2823         int i;
2824
2825         if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
2826                 playback = rtd->dai_link->dpcm_playback;
2827                 capture = rtd->dai_link->dpcm_capture;
2828         } else {
2829                 /* Adapt stream for codec2codec links */
2830                 struct snd_soc_pcm_stream *cpu_capture = rtd->dai_link->params ?
2831                         &cpu_dai->driver->playback : &cpu_dai->driver->capture;
2832                 struct snd_soc_pcm_stream *cpu_playback = rtd->dai_link->params ?
2833                         &cpu_dai->driver->capture : &cpu_dai->driver->playback;
2834
2835                 for_each_rtd_codec_dai(rtd, i, codec_dai) {
2836                         if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) &&
2837                             snd_soc_dai_stream_valid(cpu_dai,   SNDRV_PCM_STREAM_PLAYBACK))
2838                                 playback = 1;
2839                         if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) &&
2840                             snd_soc_dai_stream_valid(cpu_dai,   SNDRV_PCM_STREAM_CAPTURE))
2841                                 capture = 1;
2842                 }
2843
2844                 capture = capture && cpu_capture->channels_min;
2845                 playback = playback && cpu_playback->channels_min;
2846         }
2847
2848         if (rtd->dai_link->playback_only) {
2849                 playback = 1;
2850                 capture = 0;
2851         }
2852
2853         if (rtd->dai_link->capture_only) {
2854                 playback = 0;
2855                 capture = 1;
2856         }
2857
2858         /* create the PCM */
2859         if (rtd->dai_link->params) {
2860                 snprintf(new_name, sizeof(new_name), "codec2codec(%s)",
2861                          rtd->dai_link->stream_name);
2862
2863                 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2864                                            playback, capture, &pcm);
2865         } else if (rtd->dai_link->no_pcm) {
2866                 snprintf(new_name, sizeof(new_name), "(%s)",
2867                         rtd->dai_link->stream_name);
2868
2869                 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2870                                 playback, capture, &pcm);
2871         } else {
2872                 if (rtd->dai_link->dynamic)
2873                         snprintf(new_name, sizeof(new_name), "%s (*)",
2874                                 rtd->dai_link->stream_name);
2875                 else
2876                         snprintf(new_name, sizeof(new_name), "%s %s-%d",
2877                                 rtd->dai_link->stream_name,
2878                                 (rtd->num_codecs > 1) ?
2879                                 "multicodec" : rtd->codec_dai->name, num);
2880
2881                 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2882                         capture, &pcm);
2883         }
2884         if (ret < 0) {
2885                 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
2886                         rtd->dai_link->name);
2887                 return ret;
2888         }
2889         dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
2890
2891         /* DAPM dai link stream work */
2892         if (rtd->dai_link->params)
2893                 INIT_DELAYED_WORK(&rtd->delayed_work,
2894                                   codec2codec_close_delayed_work);
2895         else
2896                 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
2897
2898         pcm->nonatomic = rtd->dai_link->nonatomic;
2899         rtd->pcm = pcm;
2900         pcm->private_data = rtd;
2901
2902         if (rtd->dai_link->no_pcm || rtd->dai_link->params) {
2903                 if (playback)
2904                         pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2905                 if (capture)
2906                         pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2907                 goto out;
2908         }
2909
2910         /* ASoC PCM operations */
2911         if (rtd->dai_link->dynamic) {
2912                 rtd->ops.open           = dpcm_fe_dai_open;
2913                 rtd->ops.hw_params      = dpcm_fe_dai_hw_params;
2914                 rtd->ops.prepare        = dpcm_fe_dai_prepare;
2915                 rtd->ops.trigger        = dpcm_fe_dai_trigger;
2916                 rtd->ops.hw_free        = dpcm_fe_dai_hw_free;
2917                 rtd->ops.close          = dpcm_fe_dai_close;
2918                 rtd->ops.pointer        = soc_pcm_pointer;
2919                 rtd->ops.ioctl          = snd_soc_pcm_component_ioctl;
2920         } else {
2921                 rtd->ops.open           = soc_pcm_open;
2922                 rtd->ops.hw_params      = soc_pcm_hw_params;
2923                 rtd->ops.prepare        = soc_pcm_prepare;
2924                 rtd->ops.trigger        = soc_pcm_trigger;
2925                 rtd->ops.hw_free        = soc_pcm_hw_free;
2926                 rtd->ops.close          = soc_pcm_close;
2927                 rtd->ops.pointer        = soc_pcm_pointer;
2928                 rtd->ops.ioctl          = snd_soc_pcm_component_ioctl;
2929         }
2930
2931         for_each_rtdcom(rtd, rtdcom) {
2932                 const struct snd_pcm_ops *ops = rtdcom->component->driver->ops;
2933
2934                 if (!ops)
2935                         continue;
2936
2937                 if (ops->copy_user)
2938                         rtd->ops.copy_user      = snd_soc_pcm_component_copy_user;
2939                 if (ops->page)
2940                         rtd->ops.page           = snd_soc_pcm_component_page;
2941                 if (ops->mmap)
2942                         rtd->ops.mmap           = snd_soc_pcm_component_mmap;
2943         }
2944
2945         if (playback)
2946                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
2947
2948         if (capture)
2949                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
2950
2951         ret = snd_soc_pcm_component_new(pcm);
2952         if (ret < 0) {
2953                 dev_err(rtd->dev, "ASoC: pcm constructor failed: %d\n", ret);
2954                 return ret;
2955         }
2956
2957         pcm->private_free = soc_pcm_private_free;
2958         pcm->no_device_suspend = true;
2959 out:
2960         dev_info(rtd->card->dev, "%s <-> %s mapping ok\n",
2961                  (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name,
2962                  cpu_dai->name);
2963         return ret;
2964 }
2965
2966 /* is the current PCM operation for this FE ? */
2967 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
2968 {
2969         if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
2970                 return 1;
2971         return 0;
2972 }
2973 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
2974
2975 /* is the current PCM operation for this BE ? */
2976 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
2977                 struct snd_soc_pcm_runtime *be, int stream)
2978 {
2979         if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
2980            ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
2981                   be->dpcm[stream].runtime_update))
2982                 return 1;
2983         return 0;
2984 }
2985 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
2986
2987 /* get the substream for this BE */
2988 struct snd_pcm_substream *
2989         snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
2990 {
2991         return be->pcm->streams[stream].substream;
2992 }
2993 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
2994
2995 /* get the BE runtime state */
2996 enum snd_soc_dpcm_state
2997         snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream)
2998 {
2999         return be->dpcm[stream].state;
3000 }
3001 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state);
3002
3003 /* set the BE runtime state */
3004 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be,
3005                 int stream, enum snd_soc_dpcm_state state)
3006 {
3007         be->dpcm[stream].state = state;
3008 }
3009 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state);
3010
3011 /*
3012  * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
3013  * are not running, paused or suspended for the specified stream direction.
3014  */
3015 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
3016                 struct snd_soc_pcm_runtime *be, int stream)
3017 {
3018         struct snd_soc_dpcm *dpcm;
3019         int state;
3020         int ret = 1;
3021         unsigned long flags;
3022
3023         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3024         for_each_dpcm_fe(be, stream, dpcm) {
3025
3026                 if (dpcm->fe == fe)
3027                         continue;
3028
3029                 state = dpcm->fe->dpcm[stream].state;
3030                 if (state == SND_SOC_DPCM_STATE_START ||
3031                         state == SND_SOC_DPCM_STATE_PAUSED ||
3032                         state == SND_SOC_DPCM_STATE_SUSPEND) {
3033                         ret = 0;
3034                         break;
3035                 }
3036         }
3037         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3038
3039         /* it's safe to free/stop this BE DAI */
3040         return ret;
3041 }
3042 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
3043
3044 /*
3045  * We can only change hw params a BE DAI if any of it's FE are not prepared,
3046  * running, paused or suspended for the specified stream direction.
3047  */
3048 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
3049                 struct snd_soc_pcm_runtime *be, int stream)
3050 {
3051         struct snd_soc_dpcm *dpcm;
3052         int state;
3053         int ret = 1;
3054         unsigned long flags;
3055
3056         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3057         for_each_dpcm_fe(be, stream, dpcm) {
3058
3059                 if (dpcm->fe == fe)
3060                         continue;
3061
3062                 state = dpcm->fe->dpcm[stream].state;
3063                 if (state == SND_SOC_DPCM_STATE_START ||
3064                         state == SND_SOC_DPCM_STATE_PAUSED ||
3065                         state == SND_SOC_DPCM_STATE_SUSPEND ||
3066                         state == SND_SOC_DPCM_STATE_PREPARE) {
3067                         ret = 0;
3068                         break;
3069                 }
3070         }
3071         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3072
3073         /* it's safe to change hw_params */
3074         return ret;
3075 }
3076 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
3077
3078 #ifdef CONFIG_DEBUG_FS
3079 static const char *dpcm_state_string(enum snd_soc_dpcm_state state)
3080 {
3081         switch (state) {
3082         case SND_SOC_DPCM_STATE_NEW:
3083                 return "new";
3084         case SND_SOC_DPCM_STATE_OPEN:
3085                 return "open";
3086         case SND_SOC_DPCM_STATE_HW_PARAMS:
3087                 return "hw_params";
3088         case SND_SOC_DPCM_STATE_PREPARE:
3089                 return "prepare";
3090         case SND_SOC_DPCM_STATE_START:
3091                 return "start";
3092         case SND_SOC_DPCM_STATE_STOP:
3093                 return "stop";
3094         case SND_SOC_DPCM_STATE_SUSPEND:
3095                 return "suspend";
3096         case SND_SOC_DPCM_STATE_PAUSED:
3097                 return "paused";
3098         case SND_SOC_DPCM_STATE_HW_FREE:
3099                 return "hw_free";
3100         case SND_SOC_DPCM_STATE_CLOSE:
3101                 return "close";
3102         }
3103
3104         return "unknown";
3105 }
3106
3107 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
3108                                 int stream, char *buf, size_t size)
3109 {
3110         struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
3111         struct snd_soc_dpcm *dpcm;
3112         ssize_t offset = 0;
3113         unsigned long flags;
3114
3115         /* FE state */
3116         offset += snprintf(buf + offset, size - offset,
3117                         "[%s - %s]\n", fe->dai_link->name,
3118                         stream ? "Capture" : "Playback");
3119
3120         offset += snprintf(buf + offset, size - offset, "State: %s\n",
3121                         dpcm_state_string(fe->dpcm[stream].state));
3122
3123         if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3124             (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3125                 offset += snprintf(buf + offset, size - offset,
3126                                 "Hardware Params: "
3127                                 "Format = %s, Channels = %d, Rate = %d\n",
3128                                 snd_pcm_format_name(params_format(params)),
3129                                 params_channels(params),
3130                                 params_rate(params));
3131
3132         /* BEs state */
3133         offset += snprintf(buf + offset, size - offset, "Backends:\n");
3134
3135         if (list_empty(&fe->dpcm[stream].be_clients)) {
3136                 offset += snprintf(buf + offset, size - offset,
3137                                 " No active DSP links\n");
3138                 goto out;
3139         }
3140
3141         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3142         for_each_dpcm_be(fe, stream, dpcm) {
3143                 struct snd_soc_pcm_runtime *be = dpcm->be;
3144                 params = &dpcm->hw_params;
3145
3146                 offset += snprintf(buf + offset, size - offset,
3147                                 "- %s\n", be->dai_link->name);
3148
3149                 offset += snprintf(buf + offset, size - offset,
3150                                 "   State: %s\n",
3151                                 dpcm_state_string(be->dpcm[stream].state));
3152
3153                 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3154                     (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3155                         offset += snprintf(buf + offset, size - offset,
3156                                 "   Hardware Params: "
3157                                 "Format = %s, Channels = %d, Rate = %d\n",
3158                                 snd_pcm_format_name(params_format(params)),
3159                                 params_channels(params),
3160                                 params_rate(params));
3161         }
3162         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3163 out:
3164         return offset;
3165 }
3166
3167 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
3168                                 size_t count, loff_t *ppos)
3169 {
3170         struct snd_soc_pcm_runtime *fe = file->private_data;
3171         ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
3172         char *buf;
3173
3174         buf = kmalloc(out_count, GFP_KERNEL);
3175         if (!buf)
3176                 return -ENOMEM;
3177
3178         if (snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_PLAYBACK))
3179                 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
3180                                         buf + offset, out_count - offset);
3181
3182         if (snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_CAPTURE))
3183                 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE,
3184                                         buf + offset, out_count - offset);
3185
3186         ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
3187
3188         kfree(buf);
3189         return ret;
3190 }
3191
3192 static const struct file_operations dpcm_state_fops = {
3193         .open = simple_open,
3194         .read = dpcm_state_read_file,
3195         .llseek = default_llseek,
3196 };
3197
3198 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
3199 {
3200         if (!rtd->dai_link)
3201                 return;
3202
3203         if (!rtd->dai_link->dynamic)
3204                 return;
3205
3206         if (!rtd->card->debugfs_card_root)
3207                 return;
3208
3209         rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
3210                         rtd->card->debugfs_card_root);
3211
3212         debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root,
3213                             rtd, &dpcm_state_fops);
3214 }
3215 #endif