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         ret = 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         ret = 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         char *name;
1150
1151         /* only add new dpcms */
1152         for_each_dpcm_be(fe, stream, dpcm) {
1153                 if (dpcm->be == be && dpcm->fe == fe)
1154                         return 0;
1155         }
1156
1157         dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1158         if (!dpcm)
1159                 return -ENOMEM;
1160
1161         dpcm->be = be;
1162         dpcm->fe = fe;
1163         be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
1164         dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1165         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1166         list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1167         list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1168         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1169
1170         dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1171                         stream ? "capture" : "playback",  fe->dai_link->name,
1172                         stream ? "<-" : "->", be->dai_link->name);
1173
1174 #ifdef CONFIG_DEBUG_FS
1175         name = kasprintf(GFP_KERNEL, "%s:%s", be->dai_link->name,
1176                          stream ? "capture" : "playback");
1177         if (name) {
1178                 dpcm->debugfs_state = debugfs_create_dir(name,
1179                                                          fe->debugfs_dpcm_root);
1180                 debugfs_create_u32("state", 0644, dpcm->debugfs_state,
1181                                    &dpcm->state);
1182                 kfree(name);
1183         }
1184 #endif
1185         return 1;
1186 }
1187
1188 /* reparent a BE onto another FE */
1189 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1190                         struct snd_soc_pcm_runtime *be, int stream)
1191 {
1192         struct snd_soc_dpcm *dpcm;
1193         struct snd_pcm_substream *fe_substream, *be_substream;
1194
1195         /* reparent if BE is connected to other FEs */
1196         if (!be->dpcm[stream].users)
1197                 return;
1198
1199         be_substream = snd_soc_dpcm_get_substream(be, stream);
1200
1201         for_each_dpcm_fe(be, stream, dpcm) {
1202                 if (dpcm->fe == fe)
1203                         continue;
1204
1205                 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1206                         stream ? "capture" : "playback",
1207                         dpcm->fe->dai_link->name,
1208                         stream ? "<-" : "->", dpcm->be->dai_link->name);
1209
1210                 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1211                 be_substream->runtime = fe_substream->runtime;
1212                 break;
1213         }
1214 }
1215
1216 /* disconnect a BE and FE */
1217 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1218 {
1219         struct snd_soc_dpcm *dpcm, *d;
1220         unsigned long flags;
1221
1222         for_each_dpcm_be_safe(fe, stream, dpcm, d) {
1223                 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1224                                 stream ? "capture" : "playback",
1225                                 dpcm->be->dai_link->name);
1226
1227                 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1228                         continue;
1229
1230                 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1231                         stream ? "capture" : "playback", fe->dai_link->name,
1232                         stream ? "<-" : "->", dpcm->be->dai_link->name);
1233
1234                 /* BEs still alive need new FE */
1235                 dpcm_be_reparent(fe, dpcm->be, stream);
1236
1237 #ifdef CONFIG_DEBUG_FS
1238                 debugfs_remove_recursive(dpcm->debugfs_state);
1239 #endif
1240                 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1241                 list_del(&dpcm->list_be);
1242                 list_del(&dpcm->list_fe);
1243                 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1244                 kfree(dpcm);
1245         }
1246 }
1247
1248 /* get BE for DAI widget and stream */
1249 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1250                 struct snd_soc_dapm_widget *widget, int stream)
1251 {
1252         struct snd_soc_pcm_runtime *be;
1253         struct snd_soc_dai *dai;
1254         int i;
1255
1256         dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name);
1257
1258         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1259                 for_each_card_rtds(card, be) {
1260
1261                         if (!be->dai_link->no_pcm)
1262                                 continue;
1263
1264                         dev_dbg(card->dev, "ASoC: try BE : %s\n",
1265                                 be->cpu_dai->playback_widget ?
1266                                 be->cpu_dai->playback_widget->name : "(not set)");
1267
1268                         if (be->cpu_dai->playback_widget == widget)
1269                                 return be;
1270
1271                         for_each_rtd_codec_dai(be, i, dai) {
1272                                 if (dai->playback_widget == widget)
1273                                         return be;
1274                         }
1275                 }
1276         } else {
1277
1278                 for_each_card_rtds(card, be) {
1279
1280                         if (!be->dai_link->no_pcm)
1281                                 continue;
1282
1283                         dev_dbg(card->dev, "ASoC: try BE %s\n",
1284                                 be->cpu_dai->capture_widget ?
1285                                 be->cpu_dai->capture_widget->name : "(not set)");
1286
1287                         if (be->cpu_dai->capture_widget == widget)
1288                                 return be;
1289
1290                         for_each_rtd_codec_dai(be, i, dai) {
1291                                 if (dai->capture_widget == widget)
1292                                         return be;
1293                         }
1294                 }
1295         }
1296
1297         /* dai link name and stream name set correctly ? */
1298         dev_err(card->dev, "ASoC: can't get %s BE for %s\n",
1299                 stream ? "capture" : "playback", widget->name);
1300         return NULL;
1301 }
1302
1303 static inline struct snd_soc_dapm_widget *
1304         dai_get_widget(struct snd_soc_dai *dai, int stream)
1305 {
1306         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1307                 return dai->playback_widget;
1308         else
1309                 return dai->capture_widget;
1310 }
1311
1312 static int widget_in_list(struct snd_soc_dapm_widget_list *list,
1313                 struct snd_soc_dapm_widget *widget)
1314 {
1315         int i;
1316
1317         for (i = 0; i < list->num_widgets; i++) {
1318                 if (widget == list->widgets[i])
1319                         return 1;
1320         }
1321
1322         return 0;
1323 }
1324
1325 static bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget,
1326                 enum snd_soc_dapm_direction dir)
1327 {
1328         struct snd_soc_card *card = widget->dapm->card;
1329         struct snd_soc_pcm_runtime *rtd;
1330         struct snd_soc_dai *dai;
1331         int i;
1332
1333         if (dir == SND_SOC_DAPM_DIR_OUT) {
1334                 for_each_card_rtds(card, rtd) {
1335                         if (!rtd->dai_link->no_pcm)
1336                                 continue;
1337
1338                         if (rtd->cpu_dai->playback_widget == widget)
1339                                 return true;
1340
1341                         for_each_rtd_codec_dai(rtd, i, dai) {
1342                                 if (dai->playback_widget == widget)
1343                                         return true;
1344                         }
1345                 }
1346         } else { /* SND_SOC_DAPM_DIR_IN */
1347                 for_each_card_rtds(card, rtd) {
1348                         if (!rtd->dai_link->no_pcm)
1349                                 continue;
1350
1351                         if (rtd->cpu_dai->capture_widget == widget)
1352                                 return true;
1353
1354                         for_each_rtd_codec_dai(rtd, i, dai) {
1355                                 if (dai->capture_widget == widget)
1356                                         return true;
1357                         }
1358                 }
1359         }
1360
1361         return false;
1362 }
1363
1364 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1365         int stream, struct snd_soc_dapm_widget_list **list)
1366 {
1367         struct snd_soc_dai *cpu_dai = fe->cpu_dai;
1368         int paths;
1369
1370         /* get number of valid DAI paths and their widgets */
1371         paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
1372                         dpcm_end_walk_at_be);
1373
1374         dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1375                         stream ? "capture" : "playback");
1376
1377         return paths;
1378 }
1379
1380 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1381         struct snd_soc_dapm_widget_list **list_)
1382 {
1383         struct snd_soc_dpcm *dpcm;
1384         struct snd_soc_dapm_widget_list *list = *list_;
1385         struct snd_soc_dapm_widget *widget;
1386         struct snd_soc_dai *dai;
1387         int prune = 0;
1388
1389         /* Destroy any old FE <--> BE connections */
1390         for_each_dpcm_be(fe, stream, dpcm) {
1391                 unsigned int i;
1392
1393                 /* is there a valid CPU DAI widget for this BE */
1394                 widget = dai_get_widget(dpcm->be->cpu_dai, stream);
1395
1396                 /* prune the BE if it's no longer in our active list */
1397                 if (widget && widget_in_list(list, widget))
1398                         continue;
1399
1400                 /* is there a valid CODEC DAI widget for this BE */
1401                 for_each_rtd_codec_dai(dpcm->be, i, dai) {
1402                         widget = dai_get_widget(dai, stream);
1403
1404                         /* prune the BE if it's no longer in our active list */
1405                         if (widget && widget_in_list(list, widget))
1406                                 continue;
1407                 }
1408
1409                 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1410                         stream ? "capture" : "playback",
1411                         dpcm->be->dai_link->name, fe->dai_link->name);
1412                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1413                 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1414                 prune++;
1415         }
1416
1417         dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1418         return prune;
1419 }
1420
1421 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1422         struct snd_soc_dapm_widget_list **list_)
1423 {
1424         struct snd_soc_card *card = fe->card;
1425         struct snd_soc_dapm_widget_list *list = *list_;
1426         struct snd_soc_pcm_runtime *be;
1427         int i, new = 0, err;
1428
1429         /* Create any new FE <--> BE connections */
1430         for (i = 0; i < list->num_widgets; i++) {
1431
1432                 switch (list->widgets[i]->id) {
1433                 case snd_soc_dapm_dai_in:
1434                         if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1435                                 continue;
1436                         break;
1437                 case snd_soc_dapm_dai_out:
1438                         if (stream != SNDRV_PCM_STREAM_CAPTURE)
1439                                 continue;
1440                         break;
1441                 default:
1442                         continue;
1443                 }
1444
1445                 /* is there a valid BE rtd for this widget */
1446                 be = dpcm_get_be(card, list->widgets[i], stream);
1447                 if (!be) {
1448                         dev_err(fe->dev, "ASoC: no BE found for %s\n",
1449                                         list->widgets[i]->name);
1450                         continue;
1451                 }
1452
1453                 /* make sure BE is a real BE */
1454                 if (!be->dai_link->no_pcm)
1455                         continue;
1456
1457                 /* don't connect if FE is not running */
1458                 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
1459                         continue;
1460
1461                 /* newly connected FE and BE */
1462                 err = dpcm_be_connect(fe, be, stream);
1463                 if (err < 0) {
1464                         dev_err(fe->dev, "ASoC: can't connect %s\n",
1465                                 list->widgets[i]->name);
1466                         break;
1467                 } else if (err == 0) /* already connected */
1468                         continue;
1469
1470                 /* new */
1471                 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1472                 new++;
1473         }
1474
1475         dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1476         return new;
1477 }
1478
1479 /*
1480  * Find the corresponding BE DAIs that source or sink audio to this
1481  * FE substream.
1482  */
1483 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1484         int stream, struct snd_soc_dapm_widget_list **list, int new)
1485 {
1486         if (new)
1487                 return dpcm_add_paths(fe, stream, list);
1488         else
1489                 return dpcm_prune_paths(fe, stream, list);
1490 }
1491
1492 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1493 {
1494         struct snd_soc_dpcm *dpcm;
1495         unsigned long flags;
1496
1497         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1498         for_each_dpcm_be(fe, stream, dpcm)
1499                 dpcm->be->dpcm[stream].runtime_update =
1500                                                 SND_SOC_DPCM_UPDATE_NO;
1501         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1502 }
1503
1504 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
1505         int stream)
1506 {
1507         struct snd_soc_dpcm *dpcm;
1508
1509         /* disable any enabled and non active backends */
1510         for_each_dpcm_be(fe, stream, dpcm) {
1511
1512                 struct snd_soc_pcm_runtime *be = dpcm->be;
1513                 struct snd_pcm_substream *be_substream =
1514                         snd_soc_dpcm_get_substream(be, stream);
1515
1516                 if (be->dpcm[stream].users == 0)
1517                         dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1518                                 stream ? "capture" : "playback",
1519                                 be->dpcm[stream].state);
1520
1521                 if (--be->dpcm[stream].users != 0)
1522                         continue;
1523
1524                 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1525                         continue;
1526
1527                 soc_pcm_close(be_substream);
1528                 be_substream->runtime = NULL;
1529                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1530         }
1531 }
1532
1533 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1534 {
1535         struct snd_soc_dpcm *dpcm;
1536         int err, count = 0;
1537
1538         /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1539         for_each_dpcm_be(fe, stream, dpcm) {
1540
1541                 struct snd_soc_pcm_runtime *be = dpcm->be;
1542                 struct snd_pcm_substream *be_substream =
1543                         snd_soc_dpcm_get_substream(be, stream);
1544
1545                 if (!be_substream) {
1546                         dev_err(be->dev, "ASoC: no backend %s stream\n",
1547                                 stream ? "capture" : "playback");
1548                         continue;
1549                 }
1550
1551                 /* is this op for this BE ? */
1552                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1553                         continue;
1554
1555                 /* first time the dpcm is open ? */
1556                 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
1557                         dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1558                                 stream ? "capture" : "playback",
1559                                 be->dpcm[stream].state);
1560
1561                 if (be->dpcm[stream].users++ != 0)
1562                         continue;
1563
1564                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1565                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1566                         continue;
1567
1568                 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1569                         stream ? "capture" : "playback", be->dai_link->name);
1570
1571                 be_substream->runtime = be->dpcm[stream].runtime;
1572                 err = soc_pcm_open(be_substream);
1573                 if (err < 0) {
1574                         dev_err(be->dev, "ASoC: BE open failed %d\n", err);
1575                         be->dpcm[stream].users--;
1576                         if (be->dpcm[stream].users < 0)
1577                                 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1578                                         stream ? "capture" : "playback",
1579                                         be->dpcm[stream].state);
1580
1581                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1582                         goto unwind;
1583                 }
1584
1585                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1586                 count++;
1587         }
1588
1589         return count;
1590
1591 unwind:
1592         /* disable any enabled and non active backends */
1593         for_each_dpcm_be_rollback(fe, stream, dpcm) {
1594                 struct snd_soc_pcm_runtime *be = dpcm->be;
1595                 struct snd_pcm_substream *be_substream =
1596                         snd_soc_dpcm_get_substream(be, stream);
1597
1598                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1599                         continue;
1600
1601                 if (be->dpcm[stream].users == 0)
1602                         dev_err(be->dev, "ASoC: no users %s at close %d\n",
1603                                 stream ? "capture" : "playback",
1604                                 be->dpcm[stream].state);
1605
1606                 if (--be->dpcm[stream].users != 0)
1607                         continue;
1608
1609                 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1610                         continue;
1611
1612                 soc_pcm_close(be_substream);
1613                 be_substream->runtime = NULL;
1614                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1615         }
1616
1617         return err;
1618 }
1619
1620 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
1621                                  struct snd_soc_pcm_stream *stream)
1622 {
1623         runtime->hw.rate_min = stream->rate_min;
1624         runtime->hw.rate_max = min_not_zero(stream->rate_max, UINT_MAX);
1625         runtime->hw.channels_min = stream->channels_min;
1626         runtime->hw.channels_max = stream->channels_max;
1627         if (runtime->hw.formats)
1628                 runtime->hw.formats &= stream->formats;
1629         else
1630                 runtime->hw.formats = stream->formats;
1631         runtime->hw.rates = stream->rates;
1632 }
1633
1634 static void dpcm_runtime_merge_format(struct snd_pcm_substream *substream,
1635                                       u64 *formats)
1636 {
1637         struct snd_soc_pcm_runtime *fe = substream->private_data;
1638         struct snd_soc_dpcm *dpcm;
1639         struct snd_soc_dai *dai;
1640         int stream = substream->stream;
1641
1642         if (!fe->dai_link->dpcm_merged_format)
1643                 return;
1644
1645         /*
1646          * It returns merged BE codec format
1647          * if FE want to use it (= dpcm_merged_format)
1648          */
1649
1650         for_each_dpcm_be(fe, stream, dpcm) {
1651                 struct snd_soc_pcm_runtime *be = dpcm->be;
1652                 struct snd_soc_dai_driver *codec_dai_drv;
1653                 struct snd_soc_pcm_stream *codec_stream;
1654                 int i;
1655
1656                 for_each_rtd_codec_dai(be, i, dai) {
1657                         /*
1658                          * Skip CODECs which don't support the current stream
1659                          * type. See soc_pcm_init_runtime_hw() for more details
1660                          */
1661                         if (!snd_soc_dai_stream_valid(dai, stream))
1662                                 continue;
1663
1664                         codec_dai_drv = dai->driver;
1665                         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1666                                 codec_stream = &codec_dai_drv->playback;
1667                         else
1668                                 codec_stream = &codec_dai_drv->capture;
1669
1670                         *formats &= codec_stream->formats;
1671                 }
1672         }
1673 }
1674
1675 static void dpcm_runtime_merge_chan(struct snd_pcm_substream *substream,
1676                                     unsigned int *channels_min,
1677                                     unsigned int *channels_max)
1678 {
1679         struct snd_soc_pcm_runtime *fe = substream->private_data;
1680         struct snd_soc_dpcm *dpcm;
1681         int stream = substream->stream;
1682
1683         if (!fe->dai_link->dpcm_merged_chan)
1684                 return;
1685
1686         /*
1687          * It returns merged BE codec channel;
1688          * if FE want to use it (= dpcm_merged_chan)
1689          */
1690
1691         for_each_dpcm_be(fe, stream, dpcm) {
1692                 struct snd_soc_pcm_runtime *be = dpcm->be;
1693                 struct snd_soc_dai_driver *cpu_dai_drv =  be->cpu_dai->driver;
1694                 struct snd_soc_dai_driver *codec_dai_drv;
1695                 struct snd_soc_pcm_stream *codec_stream;
1696                 struct snd_soc_pcm_stream *cpu_stream;
1697
1698                 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1699                         cpu_stream = &cpu_dai_drv->playback;
1700                 else
1701                         cpu_stream = &cpu_dai_drv->capture;
1702
1703                 *channels_min = max(*channels_min, cpu_stream->channels_min);
1704                 *channels_max = min(*channels_max, cpu_stream->channels_max);
1705
1706                 /*
1707                  * chan min/max cannot be enforced if there are multiple CODEC
1708                  * DAIs connected to a single CPU DAI, use CPU DAI's directly
1709                  */
1710                 if (be->num_codecs == 1) {
1711                         codec_dai_drv = be->codec_dais[0]->driver;
1712
1713                         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1714                                 codec_stream = &codec_dai_drv->playback;
1715                         else
1716                                 codec_stream = &codec_dai_drv->capture;
1717
1718                         *channels_min = max(*channels_min,
1719                                             codec_stream->channels_min);
1720                         *channels_max = min(*channels_max,
1721                                             codec_stream->channels_max);
1722                 }
1723         }
1724 }
1725
1726 static void dpcm_runtime_merge_rate(struct snd_pcm_substream *substream,
1727                                     unsigned int *rates,
1728                                     unsigned int *rate_min,
1729                                     unsigned int *rate_max)
1730 {
1731         struct snd_soc_pcm_runtime *fe = substream->private_data;
1732         struct snd_soc_dpcm *dpcm;
1733         int stream = substream->stream;
1734
1735         if (!fe->dai_link->dpcm_merged_rate)
1736                 return;
1737
1738         /*
1739          * It returns merged BE codec channel;
1740          * if FE want to use it (= dpcm_merged_chan)
1741          */
1742
1743         for_each_dpcm_be(fe, stream, dpcm) {
1744                 struct snd_soc_pcm_runtime *be = dpcm->be;
1745                 struct snd_soc_dai_driver *cpu_dai_drv =  be->cpu_dai->driver;
1746                 struct snd_soc_dai_driver *codec_dai_drv;
1747                 struct snd_soc_pcm_stream *codec_stream;
1748                 struct snd_soc_pcm_stream *cpu_stream;
1749                 struct snd_soc_dai *dai;
1750                 int i;
1751
1752                 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1753                         cpu_stream = &cpu_dai_drv->playback;
1754                 else
1755                         cpu_stream = &cpu_dai_drv->capture;
1756
1757                 *rate_min = max(*rate_min, cpu_stream->rate_min);
1758                 *rate_max = min_not_zero(*rate_max, cpu_stream->rate_max);
1759                 *rates = snd_pcm_rate_mask_intersect(*rates, cpu_stream->rates);
1760
1761                 for_each_rtd_codec_dai(be, i, dai) {
1762                         /*
1763                          * Skip CODECs which don't support the current stream
1764                          * type. See soc_pcm_init_runtime_hw() for more details
1765                          */
1766                         if (!snd_soc_dai_stream_valid(dai, stream))
1767                                 continue;
1768
1769                         codec_dai_drv = dai->driver;
1770                         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1771                                 codec_stream = &codec_dai_drv->playback;
1772                         else
1773                                 codec_stream = &codec_dai_drv->capture;
1774
1775                         *rate_min = max(*rate_min, codec_stream->rate_min);
1776                         *rate_max = min_not_zero(*rate_max,
1777                                                  codec_stream->rate_max);
1778                         *rates = snd_pcm_rate_mask_intersect(*rates,
1779                                                 codec_stream->rates);
1780                 }
1781         }
1782 }
1783
1784 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
1785 {
1786         struct snd_pcm_runtime *runtime = substream->runtime;
1787         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1788         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1789         struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
1790
1791         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1792                 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback);
1793         else
1794                 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture);
1795
1796         dpcm_runtime_merge_format(substream, &runtime->hw.formats);
1797         dpcm_runtime_merge_chan(substream, &runtime->hw.channels_min,
1798                                 &runtime->hw.channels_max);
1799         dpcm_runtime_merge_rate(substream, &runtime->hw.rates,
1800                                 &runtime->hw.rate_min, &runtime->hw.rate_max);
1801 }
1802
1803 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
1804
1805 /* Set FE's runtime_update state; the state is protected via PCM stream lock
1806  * for avoiding the race with trigger callback.
1807  * If the state is unset and a trigger is pending while the previous operation,
1808  * process the pending trigger action here.
1809  */
1810 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
1811                                      int stream, enum snd_soc_dpcm_update state)
1812 {
1813         struct snd_pcm_substream *substream =
1814                 snd_soc_dpcm_get_substream(fe, stream);
1815
1816         snd_pcm_stream_lock_irq(substream);
1817         if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
1818                 dpcm_fe_dai_do_trigger(substream,
1819                                        fe->dpcm[stream].trigger_pending - 1);
1820                 fe->dpcm[stream].trigger_pending = 0;
1821         }
1822         fe->dpcm[stream].runtime_update = state;
1823         snd_pcm_stream_unlock_irq(substream);
1824 }
1825
1826 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
1827                                int stream)
1828 {
1829         struct snd_soc_dpcm *dpcm;
1830         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1831         struct snd_soc_dai *fe_cpu_dai = fe->cpu_dai;
1832         int err;
1833
1834         /* apply symmetry for FE */
1835         if (soc_pcm_has_symmetry(fe_substream))
1836                 fe_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1837
1838         /* Symmetry only applies if we've got an active stream. */
1839         if (fe_cpu_dai->active) {
1840                 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
1841                 if (err < 0)
1842                         return err;
1843         }
1844
1845         /* apply symmetry for BE */
1846         for_each_dpcm_be(fe, stream, dpcm) {
1847                 struct snd_soc_pcm_runtime *be = dpcm->be;
1848                 struct snd_pcm_substream *be_substream =
1849                         snd_soc_dpcm_get_substream(be, stream);
1850                 struct snd_soc_pcm_runtime *rtd;
1851                 struct snd_soc_dai *codec_dai;
1852                 int i;
1853
1854                 /* A backend may not have the requested substream */
1855                 if (!be_substream)
1856                         continue;
1857
1858                 rtd = be_substream->private_data;
1859                 if (rtd->dai_link->be_hw_params_fixup)
1860                         continue;
1861
1862                 if (soc_pcm_has_symmetry(be_substream))
1863                         be_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1864
1865                 /* Symmetry only applies if we've got an active stream. */
1866                 if (rtd->cpu_dai->active) {
1867                         err = soc_pcm_apply_symmetry(fe_substream,
1868                                                      rtd->cpu_dai);
1869                         if (err < 0)
1870                                 return err;
1871                 }
1872
1873                 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1874                         if (codec_dai->active) {
1875                                 err = soc_pcm_apply_symmetry(fe_substream,
1876                                                              codec_dai);
1877                                 if (err < 0)
1878                                         return err;
1879                         }
1880                 }
1881         }
1882
1883         return 0;
1884 }
1885
1886 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1887 {
1888         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1889         struct snd_pcm_runtime *runtime = fe_substream->runtime;
1890         int stream = fe_substream->stream, ret = 0;
1891
1892         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1893
1894         ret = dpcm_be_dai_startup(fe, fe_substream->stream);
1895         if (ret < 0) {
1896                 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
1897                 goto be_err;
1898         }
1899
1900         dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1901
1902         /* start the DAI frontend */
1903         ret = soc_pcm_open(fe_substream);
1904         if (ret < 0) {
1905                 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
1906                 goto unwind;
1907         }
1908
1909         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1910
1911         dpcm_set_fe_runtime(fe_substream);
1912         snd_pcm_limit_hw_rates(runtime);
1913
1914         ret = dpcm_apply_symmetry(fe_substream, stream);
1915         if (ret < 0) {
1916                 dev_err(fe->dev, "ASoC: failed to apply dpcm symmetry %d\n",
1917                         ret);
1918                 goto unwind;
1919         }
1920
1921         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1922         return 0;
1923
1924 unwind:
1925         dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
1926 be_err:
1927         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1928         return ret;
1929 }
1930
1931 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1932 {
1933         struct snd_soc_dpcm *dpcm;
1934
1935         /* only shutdown BEs that are either sinks or sources to this FE DAI */
1936         for_each_dpcm_be(fe, stream, dpcm) {
1937
1938                 struct snd_soc_pcm_runtime *be = dpcm->be;
1939                 struct snd_pcm_substream *be_substream =
1940                         snd_soc_dpcm_get_substream(be, stream);
1941
1942                 /* is this op for this BE ? */
1943                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1944                         continue;
1945
1946                 if (be->dpcm[stream].users == 0)
1947                         dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1948                                 stream ? "capture" : "playback",
1949                                 be->dpcm[stream].state);
1950
1951                 if (--be->dpcm[stream].users != 0)
1952                         continue;
1953
1954                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1955                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)) {
1956                         soc_pcm_hw_free(be_substream);
1957                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1958                 }
1959
1960                 dev_dbg(be->dev, "ASoC: close BE %s\n",
1961                         be->dai_link->name);
1962
1963                 soc_pcm_close(be_substream);
1964                 be_substream->runtime = NULL;
1965
1966                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1967         }
1968         return 0;
1969 }
1970
1971 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
1972 {
1973         struct snd_soc_pcm_runtime *fe = substream->private_data;
1974         int stream = substream->stream;
1975
1976         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1977
1978         /* shutdown the BEs */
1979         dpcm_be_dai_shutdown(fe, substream->stream);
1980
1981         dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
1982
1983         /* now shutdown the frontend */
1984         soc_pcm_close(substream);
1985
1986         /* run the stream event for each BE */
1987         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
1988
1989         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1990         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1991         return 0;
1992 }
1993
1994 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
1995 {
1996         struct snd_soc_dpcm *dpcm;
1997
1998         /* only hw_params backends that are either sinks or sources
1999          * to this frontend DAI */
2000         for_each_dpcm_be(fe, stream, dpcm) {
2001
2002                 struct snd_soc_pcm_runtime *be = dpcm->be;
2003                 struct snd_pcm_substream *be_substream =
2004                         snd_soc_dpcm_get_substream(be, stream);
2005
2006                 /* is this op for this BE ? */
2007                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2008                         continue;
2009
2010                 /* only free hw when no longer used - check all FEs */
2011                 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2012                                 continue;
2013
2014                 /* do not free hw if this BE is used by other FE */
2015                 if (be->dpcm[stream].users > 1)
2016                         continue;
2017
2018                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2019                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2020                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2021                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
2022                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2023                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2024                         continue;
2025
2026                 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
2027                         be->dai_link->name);
2028
2029                 soc_pcm_hw_free(be_substream);
2030
2031                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2032         }
2033
2034         return 0;
2035 }
2036
2037 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
2038 {
2039         struct snd_soc_pcm_runtime *fe = substream->private_data;
2040         int err, stream = substream->stream;
2041
2042         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2043         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2044
2045         dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
2046
2047         /* call hw_free on the frontend */
2048         err = soc_pcm_hw_free(substream);
2049         if (err < 0)
2050                 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
2051                         fe->dai_link->name);
2052
2053         /* only hw_params backends that are either sinks or sources
2054          * to this frontend DAI */
2055         err = dpcm_be_dai_hw_free(fe, stream);
2056
2057         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2058         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2059
2060         mutex_unlock(&fe->card->mutex);
2061         return 0;
2062 }
2063
2064 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
2065 {
2066         struct snd_soc_dpcm *dpcm;
2067         int ret;
2068
2069         for_each_dpcm_be(fe, stream, dpcm) {
2070
2071                 struct snd_soc_pcm_runtime *be = dpcm->be;
2072                 struct snd_pcm_substream *be_substream =
2073                         snd_soc_dpcm_get_substream(be, stream);
2074
2075                 /* is this op for this BE ? */
2076                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2077                         continue;
2078
2079                 /* copy params for each dpcm */
2080                 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
2081                                 sizeof(struct snd_pcm_hw_params));
2082
2083                 /* perform any hw_params fixups */
2084                 if (be->dai_link->be_hw_params_fixup) {
2085                         ret = be->dai_link->be_hw_params_fixup(be,
2086                                         &dpcm->hw_params);
2087                         if (ret < 0) {
2088                                 dev_err(be->dev,
2089                                         "ASoC: hw_params BE fixup failed %d\n",
2090                                         ret);
2091                                 goto unwind;
2092                         }
2093                 }
2094
2095                 /* copy the fixed-up hw params for BE dai */
2096                 memcpy(&be->dpcm[stream].hw_params, &dpcm->hw_params,
2097                        sizeof(struct snd_pcm_hw_params));
2098
2099                 /* only allow hw_params() if no connected FEs are running */
2100                 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
2101                         continue;
2102
2103                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2104                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2105                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
2106                         continue;
2107
2108                 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
2109                         be->dai_link->name);
2110
2111                 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
2112                 if (ret < 0) {
2113                         dev_err(dpcm->be->dev,
2114                                 "ASoC: hw_params BE failed %d\n", ret);
2115                         goto unwind;
2116                 }
2117
2118                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2119         }
2120         return 0;
2121
2122 unwind:
2123         /* disable any enabled and non active backends */
2124         for_each_dpcm_be_rollback(fe, stream, dpcm) {
2125                 struct snd_soc_pcm_runtime *be = dpcm->be;
2126                 struct snd_pcm_substream *be_substream =
2127                         snd_soc_dpcm_get_substream(be, stream);
2128
2129                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2130                         continue;
2131
2132                 /* only allow hw_free() if no connected FEs are running */
2133                 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2134                         continue;
2135
2136                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2137                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2138                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2139                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2140                         continue;
2141
2142                 soc_pcm_hw_free(be_substream);
2143         }
2144
2145         return ret;
2146 }
2147
2148 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
2149                                  struct snd_pcm_hw_params *params)
2150 {
2151         struct snd_soc_pcm_runtime *fe = substream->private_data;
2152         int ret, stream = substream->stream;
2153
2154         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2155         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2156
2157         memcpy(&fe->dpcm[substream->stream].hw_params, params,
2158                         sizeof(struct snd_pcm_hw_params));
2159         ret = dpcm_be_dai_hw_params(fe, substream->stream);
2160         if (ret < 0) {
2161                 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
2162                 goto out;
2163         }
2164
2165         dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
2166                         fe->dai_link->name, params_rate(params),
2167                         params_channels(params), params_format(params));
2168
2169         /* call hw_params on the frontend */
2170         ret = soc_pcm_hw_params(substream, params);
2171         if (ret < 0) {
2172                 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
2173                 dpcm_be_dai_hw_free(fe, stream);
2174          } else
2175                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2176
2177 out:
2178         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2179         mutex_unlock(&fe->card->mutex);
2180         return ret;
2181 }
2182
2183 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
2184                 struct snd_pcm_substream *substream, int cmd)
2185 {
2186         int ret;
2187
2188         dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n",
2189                         dpcm->be->dai_link->name, cmd);
2190
2191         ret = soc_pcm_trigger(substream, cmd);
2192         if (ret < 0)
2193                 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret);
2194
2195         return ret;
2196 }
2197
2198 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
2199                                int cmd)
2200 {
2201         struct snd_soc_dpcm *dpcm;
2202         int ret = 0;
2203
2204         for_each_dpcm_be(fe, stream, dpcm) {
2205
2206                 struct snd_soc_pcm_runtime *be = dpcm->be;
2207                 struct snd_pcm_substream *be_substream =
2208                         snd_soc_dpcm_get_substream(be, stream);
2209
2210                 /* is this op for this BE ? */
2211                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2212                         continue;
2213
2214                 switch (cmd) {
2215                 case SNDRV_PCM_TRIGGER_START:
2216                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2217                             (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2218                                 continue;
2219
2220                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2221                         if (ret)
2222                                 return ret;
2223
2224                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2225                         break;
2226                 case SNDRV_PCM_TRIGGER_RESUME:
2227                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2228                                 continue;
2229
2230                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2231                         if (ret)
2232                                 return ret;
2233
2234                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2235                         break;
2236                 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2237                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2238                                 continue;
2239
2240                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2241                         if (ret)
2242                                 return ret;
2243
2244                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2245                         break;
2246                 case SNDRV_PCM_TRIGGER_STOP:
2247                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2248                                 continue;
2249
2250                         if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2251                                 continue;
2252
2253                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2254                         if (ret)
2255                                 return ret;
2256
2257                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2258                         break;
2259                 case SNDRV_PCM_TRIGGER_SUSPEND:
2260                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2261                                 continue;
2262
2263                         if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2264                                 continue;
2265
2266                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2267                         if (ret)
2268                                 return ret;
2269
2270                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
2271                         break;
2272                 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2273                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2274                                 continue;
2275
2276                         if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2277                                 continue;
2278
2279                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2280                         if (ret)
2281                                 return ret;
2282
2283                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2284                         break;
2285                 }
2286         }
2287
2288         return ret;
2289 }
2290 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2291
2292 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
2293 {
2294         struct snd_soc_pcm_runtime *fe = substream->private_data;
2295         int stream = substream->stream, ret;
2296         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2297
2298         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2299
2300         switch (trigger) {
2301         case SND_SOC_DPCM_TRIGGER_PRE:
2302                 /* call trigger on the frontend before the backend. */
2303
2304                 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2305                                 fe->dai_link->name, cmd);
2306
2307                 ret = soc_pcm_trigger(substream, cmd);
2308                 if (ret < 0) {
2309                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2310                         goto out;
2311                 }
2312
2313                 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2314                 break;
2315         case SND_SOC_DPCM_TRIGGER_POST:
2316                 /* call trigger on the frontend after the backend. */
2317
2318                 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2319                 if (ret < 0) {
2320                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2321                         goto out;
2322                 }
2323
2324                 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2325                                 fe->dai_link->name, cmd);
2326
2327                 ret = soc_pcm_trigger(substream, cmd);
2328                 break;
2329         case SND_SOC_DPCM_TRIGGER_BESPOKE:
2330                 /* bespoke trigger() - handles both FE and BEs */
2331
2332                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
2333                                 fe->dai_link->name, cmd);
2334
2335                 ret = soc_pcm_bespoke_trigger(substream, cmd);
2336                 if (ret < 0) {
2337                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2338                         goto out;
2339                 }
2340                 break;
2341         default:
2342                 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
2343                                 fe->dai_link->name);
2344                 ret = -EINVAL;
2345                 goto out;
2346         }
2347
2348         switch (cmd) {
2349         case SNDRV_PCM_TRIGGER_START:
2350         case SNDRV_PCM_TRIGGER_RESUME:
2351         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2352                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2353                 break;
2354         case SNDRV_PCM_TRIGGER_STOP:
2355         case SNDRV_PCM_TRIGGER_SUSPEND:
2356                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2357                 break;
2358         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2359                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2360                 break;
2361         }
2362
2363 out:
2364         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2365         return ret;
2366 }
2367
2368 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2369 {
2370         struct snd_soc_pcm_runtime *fe = substream->private_data;
2371         int stream = substream->stream;
2372
2373         /* if FE's runtime_update is already set, we're in race;
2374          * process this trigger later at exit
2375          */
2376         if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2377                 fe->dpcm[stream].trigger_pending = cmd + 1;
2378                 return 0; /* delayed, assuming it's successful */
2379         }
2380
2381         /* we're alone, let's trigger */
2382         return dpcm_fe_dai_do_trigger(substream, cmd);
2383 }
2384
2385 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2386 {
2387         struct snd_soc_dpcm *dpcm;
2388         int ret = 0;
2389
2390         for_each_dpcm_be(fe, stream, dpcm) {
2391
2392                 struct snd_soc_pcm_runtime *be = dpcm->be;
2393                 struct snd_pcm_substream *be_substream =
2394                         snd_soc_dpcm_get_substream(be, stream);
2395
2396                 /* is this op for this BE ? */
2397                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2398                         continue;
2399
2400                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2401                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2402                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) &&
2403                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2404                         continue;
2405
2406                 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2407                         be->dai_link->name);
2408
2409                 ret = soc_pcm_prepare(be_substream);
2410                 if (ret < 0) {
2411                         dev_err(be->dev, "ASoC: backend prepare failed %d\n",
2412                                 ret);
2413                         break;
2414                 }
2415
2416                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2417         }
2418         return ret;
2419 }
2420
2421 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2422 {
2423         struct snd_soc_pcm_runtime *fe = substream->private_data;
2424         int stream = substream->stream, ret = 0;
2425
2426         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2427
2428         dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2429
2430         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2431
2432         /* there is no point preparing this FE if there are no BEs */
2433         if (list_empty(&fe->dpcm[stream].be_clients)) {
2434                 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2435                                 fe->dai_link->name);
2436                 ret = -EINVAL;
2437                 goto out;
2438         }
2439
2440         ret = dpcm_be_dai_prepare(fe, substream->stream);
2441         if (ret < 0)
2442                 goto out;
2443
2444         /* call prepare on the frontend */
2445         ret = soc_pcm_prepare(substream);
2446         if (ret < 0) {
2447                 dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
2448                         fe->dai_link->name);
2449                 goto out;
2450         }
2451
2452         /* run the stream event for each BE */
2453         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
2454         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2455
2456 out:
2457         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2458         mutex_unlock(&fe->card->mutex);
2459
2460         return ret;
2461 }
2462
2463 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2464 {
2465         struct snd_pcm_substream *substream =
2466                 snd_soc_dpcm_get_substream(fe, stream);
2467         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2468         int err;
2469
2470         dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2471                         stream ? "capture" : "playback", fe->dai_link->name);
2472
2473         if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2474                 /* call bespoke trigger - FE takes care of all BE triggers */
2475                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2476                                 fe->dai_link->name);
2477
2478                 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2479                 if (err < 0)
2480                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2481         } else {
2482                 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2483                         fe->dai_link->name);
2484
2485                 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2486                 if (err < 0)
2487                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2488         }
2489
2490         err = dpcm_be_dai_hw_free(fe, stream);
2491         if (err < 0)
2492                 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
2493
2494         err = dpcm_be_dai_shutdown(fe, stream);
2495         if (err < 0)
2496                 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
2497
2498         /* run the stream event for each BE */
2499         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2500
2501         return 0;
2502 }
2503
2504 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2505 {
2506         struct snd_pcm_substream *substream =
2507                 snd_soc_dpcm_get_substream(fe, stream);
2508         struct snd_soc_dpcm *dpcm;
2509         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2510         int ret;
2511         unsigned long flags;
2512
2513         dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2514                         stream ? "capture" : "playback", fe->dai_link->name);
2515
2516         /* Only start the BE if the FE is ready */
2517         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2518                 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
2519                 return -EINVAL;
2520
2521         /* startup must always be called for new BEs */
2522         ret = dpcm_be_dai_startup(fe, stream);
2523         if (ret < 0)
2524                 goto disconnect;
2525
2526         /* keep going if FE state is > open */
2527         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2528                 return 0;
2529
2530         ret = dpcm_be_dai_hw_params(fe, stream);
2531         if (ret < 0)
2532                 goto close;
2533
2534         /* keep going if FE state is > hw_params */
2535         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2536                 return 0;
2537
2538
2539         ret = dpcm_be_dai_prepare(fe, stream);
2540         if (ret < 0)
2541                 goto hw_free;
2542
2543         /* run the stream event for each BE */
2544         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2545
2546         /* keep going if FE state is > prepare */
2547         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2548                 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2549                 return 0;
2550
2551         if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2552                 /* call trigger on the frontend - FE takes care of all BE triggers */
2553                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
2554                                 fe->dai_link->name);
2555
2556                 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2557                 if (ret < 0) {
2558                         dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
2559                         goto hw_free;
2560                 }
2561         } else {
2562                 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2563                         fe->dai_link->name);
2564
2565                 ret = dpcm_be_dai_trigger(fe, stream,
2566                                         SNDRV_PCM_TRIGGER_START);
2567                 if (ret < 0) {
2568                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2569                         goto hw_free;
2570                 }
2571         }
2572
2573         return 0;
2574
2575 hw_free:
2576         dpcm_be_dai_hw_free(fe, stream);
2577 close:
2578         dpcm_be_dai_shutdown(fe, stream);
2579 disconnect:
2580         /* disconnect any non started BEs */
2581         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
2582         for_each_dpcm_be(fe, stream, dpcm) {
2583                 struct snd_soc_pcm_runtime *be = dpcm->be;
2584                 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2585                                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2586         }
2587         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
2588
2589         return ret;
2590 }
2591
2592 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
2593 {
2594         int ret;
2595
2596         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2597         ret = dpcm_run_update_startup(fe, stream);
2598         if (ret < 0)
2599                 dev_err(fe->dev, "ASoC: failed to startup some BEs\n");
2600         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2601
2602         return ret;
2603 }
2604
2605 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
2606 {
2607         int ret;
2608
2609         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2610         ret = dpcm_run_update_shutdown(fe, stream);
2611         if (ret < 0)
2612                 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
2613         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2614
2615         return ret;
2616 }
2617
2618 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new)
2619 {
2620         struct snd_soc_dapm_widget_list *list;
2621         int count, paths;
2622
2623         if (!fe->dai_link->dynamic)
2624                 return 0;
2625
2626         /* only check active links */
2627         if (!fe->cpu_dai->active)
2628                 return 0;
2629
2630         /* DAPM sync will call this to update DSP paths */
2631         dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n",
2632                 new ? "new" : "old", fe->dai_link->name);
2633
2634         /* skip if FE doesn't have playback capability */
2635         if (!snd_soc_dai_stream_valid(fe->cpu_dai,   SNDRV_PCM_STREAM_PLAYBACK) ||
2636             !snd_soc_dai_stream_valid(fe->codec_dai, SNDRV_PCM_STREAM_PLAYBACK))
2637                 goto capture;
2638
2639         /* skip if FE isn't currently playing */
2640         if (!fe->cpu_dai->playback_active || !fe->codec_dai->playback_active)
2641                 goto capture;
2642
2643         paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
2644         if (paths < 0) {
2645                 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2646                          fe->dai_link->name,  "playback");
2647                 return paths;
2648         }
2649
2650         /* update any playback paths */
2651         count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, new);
2652         if (count) {
2653                 if (new)
2654                         dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2655                 else
2656                         dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2657
2658                 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2659                 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2660         }
2661
2662         dpcm_path_put(&list);
2663
2664 capture:
2665         /* skip if FE doesn't have capture capability */
2666         if (!snd_soc_dai_stream_valid(fe->cpu_dai,   SNDRV_PCM_STREAM_CAPTURE) ||
2667             !snd_soc_dai_stream_valid(fe->codec_dai, SNDRV_PCM_STREAM_CAPTURE))
2668                 return 0;
2669
2670         /* skip if FE isn't currently capturing */
2671         if (!fe->cpu_dai->capture_active || !fe->codec_dai->capture_active)
2672                 return 0;
2673
2674         paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
2675         if (paths < 0) {
2676                 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2677                          fe->dai_link->name,  "capture");
2678                 return paths;
2679         }
2680
2681         /* update any old capture paths */
2682         count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, new);
2683         if (count) {
2684                 if (new)
2685                         dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2686                 else
2687                         dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2688
2689                 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2690                 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2691         }
2692
2693         dpcm_path_put(&list);
2694
2695         return 0;
2696 }
2697
2698 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2699  * any DAI links.
2700  */
2701 int soc_dpcm_runtime_update(struct snd_soc_card *card)
2702 {
2703         struct snd_soc_pcm_runtime *fe;
2704         int ret = 0;
2705
2706         mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2707         /* shutdown all old paths first */
2708         for_each_card_rtds(card, fe) {
2709                 ret = soc_dpcm_fe_runtime_update(fe, 0);
2710                 if (ret)
2711                         goto out;
2712         }
2713
2714         /* bring new paths up */
2715         for_each_card_rtds(card, fe) {
2716                 ret = soc_dpcm_fe_runtime_update(fe, 1);
2717                 if (ret)
2718                         goto out;
2719         }
2720
2721 out:
2722         mutex_unlock(&card->mutex);
2723         return ret;
2724 }
2725 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
2726 {
2727         struct snd_soc_dpcm *dpcm;
2728         struct snd_soc_dai *dai;
2729
2730         for_each_dpcm_be(fe, SNDRV_PCM_STREAM_PLAYBACK, dpcm) {
2731
2732                 struct snd_soc_pcm_runtime *be = dpcm->be;
2733                 int i;
2734
2735                 if (be->dai_link->ignore_suspend)
2736                         continue;
2737
2738                 for_each_rtd_codec_dai(be, i, dai) {
2739                         struct snd_soc_dai_driver *drv = dai->driver;
2740
2741                         dev_dbg(be->dev, "ASoC: BE digital mute %s\n",
2742                                          be->dai_link->name);
2743
2744                         if (drv->ops && drv->ops->digital_mute &&
2745                                                         dai->playback_active)
2746                                 drv->ops->digital_mute(dai, mute);
2747                 }
2748         }
2749
2750         return 0;
2751 }
2752
2753 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2754 {
2755         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2756         struct snd_soc_dpcm *dpcm;
2757         struct snd_soc_dapm_widget_list *list;
2758         int ret;
2759         int stream = fe_substream->stream;
2760
2761         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2762         fe->dpcm[stream].runtime = fe_substream->runtime;
2763
2764         ret = dpcm_path_get(fe, stream, &list);
2765         if (ret < 0) {
2766                 mutex_unlock(&fe->card->mutex);
2767                 return ret;
2768         } else if (ret == 0) {
2769                 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
2770                         fe->dai_link->name, stream ? "capture" : "playback");
2771         }
2772
2773         /* calculate valid and active FE <-> BE dpcms */
2774         dpcm_process_paths(fe, stream, &list, 1);
2775
2776         ret = dpcm_fe_dai_startup(fe_substream);
2777         if (ret < 0) {
2778                 /* clean up all links */
2779                 for_each_dpcm_be(fe, stream, dpcm)
2780                         dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2781
2782                 dpcm_be_disconnect(fe, stream);
2783                 fe->dpcm[stream].runtime = NULL;
2784         }
2785
2786         dpcm_clear_pending_state(fe, stream);
2787         dpcm_path_put(&list);
2788         mutex_unlock(&fe->card->mutex);
2789         return ret;
2790 }
2791
2792 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2793 {
2794         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2795         struct snd_soc_dpcm *dpcm;
2796         int stream = fe_substream->stream, ret;
2797
2798         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2799         ret = dpcm_fe_dai_shutdown(fe_substream);
2800
2801         /* mark FE's links ready to prune */
2802         for_each_dpcm_be(fe, stream, dpcm)
2803                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2804
2805         dpcm_be_disconnect(fe, stream);
2806
2807         fe->dpcm[stream].runtime = NULL;
2808         mutex_unlock(&fe->card->mutex);
2809         return ret;
2810 }
2811
2812 static void soc_pcm_private_free(struct snd_pcm *pcm)
2813 {
2814         struct snd_soc_pcm_runtime *rtd = pcm->private_data;
2815
2816         /* need to sync the delayed work before releasing resources */
2817         flush_delayed_work(&rtd->delayed_work);
2818         snd_soc_pcm_component_free(pcm);
2819 }
2820
2821 /* create a new pcm */
2822 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2823 {
2824         struct snd_soc_dai *codec_dai;
2825         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2826         struct snd_soc_rtdcom_list *rtdcom;
2827         struct snd_pcm *pcm;
2828         char new_name[64];
2829         int ret = 0, playback = 0, capture = 0;
2830         int i;
2831
2832         if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
2833                 playback = rtd->dai_link->dpcm_playback;
2834                 capture = rtd->dai_link->dpcm_capture;
2835         } else {
2836                 /* Adapt stream for codec2codec links */
2837                 struct snd_soc_pcm_stream *cpu_capture = rtd->dai_link->params ?
2838                         &cpu_dai->driver->playback : &cpu_dai->driver->capture;
2839                 struct snd_soc_pcm_stream *cpu_playback = rtd->dai_link->params ?
2840                         &cpu_dai->driver->capture : &cpu_dai->driver->playback;
2841
2842                 for_each_rtd_codec_dai(rtd, i, codec_dai) {
2843                         if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) &&
2844                             snd_soc_dai_stream_valid(cpu_dai,   SNDRV_PCM_STREAM_PLAYBACK))
2845                                 playback = 1;
2846                         if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) &&
2847                             snd_soc_dai_stream_valid(cpu_dai,   SNDRV_PCM_STREAM_CAPTURE))
2848                                 capture = 1;
2849                 }
2850
2851                 capture = capture && cpu_capture->channels_min;
2852                 playback = playback && cpu_playback->channels_min;
2853         }
2854
2855         if (rtd->dai_link->playback_only) {
2856                 playback = 1;
2857                 capture = 0;
2858         }
2859
2860         if (rtd->dai_link->capture_only) {
2861                 playback = 0;
2862                 capture = 1;
2863         }
2864
2865         /* create the PCM */
2866         if (rtd->dai_link->params) {
2867                 snprintf(new_name, sizeof(new_name), "codec2codec(%s)",
2868                          rtd->dai_link->stream_name);
2869
2870                 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2871                                            playback, capture, &pcm);
2872         } else if (rtd->dai_link->no_pcm) {
2873                 snprintf(new_name, sizeof(new_name), "(%s)",
2874                         rtd->dai_link->stream_name);
2875
2876                 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2877                                 playback, capture, &pcm);
2878         } else {
2879                 if (rtd->dai_link->dynamic)
2880                         snprintf(new_name, sizeof(new_name), "%s (*)",
2881                                 rtd->dai_link->stream_name);
2882                 else
2883                         snprintf(new_name, sizeof(new_name), "%s %s-%d",
2884                                 rtd->dai_link->stream_name,
2885                                 (rtd->num_codecs > 1) ?
2886                                 "multicodec" : rtd->codec_dai->name, num);
2887
2888                 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2889                         capture, &pcm);
2890         }
2891         if (ret < 0) {
2892                 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
2893                         rtd->dai_link->name);
2894                 return ret;
2895         }
2896         dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
2897
2898         /* DAPM dai link stream work */
2899         if (rtd->dai_link->params)
2900                 INIT_DELAYED_WORK(&rtd->delayed_work,
2901                                   codec2codec_close_delayed_work);
2902         else
2903                 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
2904
2905         pcm->nonatomic = rtd->dai_link->nonatomic;
2906         rtd->pcm = pcm;
2907         pcm->private_data = rtd;
2908
2909         if (rtd->dai_link->no_pcm || rtd->dai_link->params) {
2910                 if (playback)
2911                         pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2912                 if (capture)
2913                         pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2914                 goto out;
2915         }
2916
2917         /* ASoC PCM operations */
2918         if (rtd->dai_link->dynamic) {
2919                 rtd->ops.open           = dpcm_fe_dai_open;
2920                 rtd->ops.hw_params      = dpcm_fe_dai_hw_params;
2921                 rtd->ops.prepare        = dpcm_fe_dai_prepare;
2922                 rtd->ops.trigger        = dpcm_fe_dai_trigger;
2923                 rtd->ops.hw_free        = dpcm_fe_dai_hw_free;
2924                 rtd->ops.close          = dpcm_fe_dai_close;
2925                 rtd->ops.pointer        = soc_pcm_pointer;
2926                 rtd->ops.ioctl          = snd_soc_pcm_component_ioctl;
2927         } else {
2928                 rtd->ops.open           = soc_pcm_open;
2929                 rtd->ops.hw_params      = soc_pcm_hw_params;
2930                 rtd->ops.prepare        = soc_pcm_prepare;
2931                 rtd->ops.trigger        = soc_pcm_trigger;
2932                 rtd->ops.hw_free        = soc_pcm_hw_free;
2933                 rtd->ops.close          = soc_pcm_close;
2934                 rtd->ops.pointer        = soc_pcm_pointer;
2935                 rtd->ops.ioctl          = snd_soc_pcm_component_ioctl;
2936         }
2937
2938         for_each_rtdcom(rtd, rtdcom) {
2939                 const struct snd_pcm_ops *ops = rtdcom->component->driver->ops;
2940
2941                 if (!ops)
2942                         continue;
2943
2944                 if (ops->copy_user)
2945                         rtd->ops.copy_user      = snd_soc_pcm_component_copy_user;
2946                 if (ops->page)
2947                         rtd->ops.page           = snd_soc_pcm_component_page;
2948                 if (ops->mmap)
2949                         rtd->ops.mmap           = snd_soc_pcm_component_mmap;
2950         }
2951
2952         if (playback)
2953                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
2954
2955         if (capture)
2956                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
2957
2958         ret = snd_soc_pcm_component_new(pcm);
2959         if (ret < 0) {
2960                 dev_err(rtd->dev, "ASoC: pcm constructor failed: %d\n", ret);
2961                 return ret;
2962         }
2963
2964         pcm->private_free = soc_pcm_private_free;
2965         pcm->no_device_suspend = true;
2966 out:
2967         dev_info(rtd->card->dev, "%s <-> %s mapping ok\n",
2968                  (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name,
2969                  cpu_dai->name);
2970         return ret;
2971 }
2972
2973 /* is the current PCM operation for this FE ? */
2974 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
2975 {
2976         if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
2977                 return 1;
2978         return 0;
2979 }
2980 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
2981
2982 /* is the current PCM operation for this BE ? */
2983 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
2984                 struct snd_soc_pcm_runtime *be, int stream)
2985 {
2986         if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
2987            ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
2988                   be->dpcm[stream].runtime_update))
2989                 return 1;
2990         return 0;
2991 }
2992 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
2993
2994 /* get the substream for this BE */
2995 struct snd_pcm_substream *
2996         snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
2997 {
2998         return be->pcm->streams[stream].substream;
2999 }
3000 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
3001
3002 /* get the BE runtime state */
3003 enum snd_soc_dpcm_state
3004         snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream)
3005 {
3006         return be->dpcm[stream].state;
3007 }
3008 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state);
3009
3010 /* set the BE runtime state */
3011 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be,
3012                 int stream, enum snd_soc_dpcm_state state)
3013 {
3014         be->dpcm[stream].state = state;
3015 }
3016 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state);
3017
3018 /*
3019  * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
3020  * are not running, paused or suspended for the specified stream direction.
3021  */
3022 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
3023                 struct snd_soc_pcm_runtime *be, int stream)
3024 {
3025         struct snd_soc_dpcm *dpcm;
3026         int state;
3027         int ret = 1;
3028         unsigned long flags;
3029
3030         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3031         for_each_dpcm_fe(be, stream, dpcm) {
3032
3033                 if (dpcm->fe == fe)
3034                         continue;
3035
3036                 state = dpcm->fe->dpcm[stream].state;
3037                 if (state == SND_SOC_DPCM_STATE_START ||
3038                         state == SND_SOC_DPCM_STATE_PAUSED ||
3039                         state == SND_SOC_DPCM_STATE_SUSPEND) {
3040                         ret = 0;
3041                         break;
3042                 }
3043         }
3044         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3045
3046         /* it's safe to free/stop this BE DAI */
3047         return ret;
3048 }
3049 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
3050
3051 /*
3052  * We can only change hw params a BE DAI if any of it's FE are not prepared,
3053  * running, paused or suspended for the specified stream direction.
3054  */
3055 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
3056                 struct snd_soc_pcm_runtime *be, int stream)
3057 {
3058         struct snd_soc_dpcm *dpcm;
3059         int state;
3060         int ret = 1;
3061         unsigned long flags;
3062
3063         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3064         for_each_dpcm_fe(be, stream, dpcm) {
3065
3066                 if (dpcm->fe == fe)
3067                         continue;
3068
3069                 state = dpcm->fe->dpcm[stream].state;
3070                 if (state == SND_SOC_DPCM_STATE_START ||
3071                         state == SND_SOC_DPCM_STATE_PAUSED ||
3072                         state == SND_SOC_DPCM_STATE_SUSPEND ||
3073                         state == SND_SOC_DPCM_STATE_PREPARE) {
3074                         ret = 0;
3075                         break;
3076                 }
3077         }
3078         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3079
3080         /* it's safe to change hw_params */
3081         return ret;
3082 }
3083 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
3084
3085 #ifdef CONFIG_DEBUG_FS
3086 static const char *dpcm_state_string(enum snd_soc_dpcm_state state)
3087 {
3088         switch (state) {
3089         case SND_SOC_DPCM_STATE_NEW:
3090                 return "new";
3091         case SND_SOC_DPCM_STATE_OPEN:
3092                 return "open";
3093         case SND_SOC_DPCM_STATE_HW_PARAMS:
3094                 return "hw_params";
3095         case SND_SOC_DPCM_STATE_PREPARE:
3096                 return "prepare";
3097         case SND_SOC_DPCM_STATE_START:
3098                 return "start";
3099         case SND_SOC_DPCM_STATE_STOP:
3100                 return "stop";
3101         case SND_SOC_DPCM_STATE_SUSPEND:
3102                 return "suspend";
3103         case SND_SOC_DPCM_STATE_PAUSED:
3104                 return "paused";
3105         case SND_SOC_DPCM_STATE_HW_FREE:
3106                 return "hw_free";
3107         case SND_SOC_DPCM_STATE_CLOSE:
3108                 return "close";
3109         }
3110
3111         return "unknown";
3112 }
3113
3114 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
3115                                 int stream, char *buf, size_t size)
3116 {
3117         struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
3118         struct snd_soc_dpcm *dpcm;
3119         ssize_t offset = 0;
3120         unsigned long flags;
3121
3122         /* FE state */
3123         offset += snprintf(buf + offset, size - offset,
3124                         "[%s - %s]\n", fe->dai_link->name,
3125                         stream ? "Capture" : "Playback");
3126
3127         offset += snprintf(buf + offset, size - offset, "State: %s\n",
3128                         dpcm_state_string(fe->dpcm[stream].state));
3129
3130         if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3131             (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3132                 offset += snprintf(buf + offset, size - offset,
3133                                 "Hardware Params: "
3134                                 "Format = %s, Channels = %d, Rate = %d\n",
3135                                 snd_pcm_format_name(params_format(params)),
3136                                 params_channels(params),
3137                                 params_rate(params));
3138
3139         /* BEs state */
3140         offset += snprintf(buf + offset, size - offset, "Backends:\n");
3141
3142         if (list_empty(&fe->dpcm[stream].be_clients)) {
3143                 offset += snprintf(buf + offset, size - offset,
3144                                 " No active DSP links\n");
3145                 goto out;
3146         }
3147
3148         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3149         for_each_dpcm_be(fe, stream, dpcm) {
3150                 struct snd_soc_pcm_runtime *be = dpcm->be;
3151                 params = &dpcm->hw_params;
3152
3153                 offset += snprintf(buf + offset, size - offset,
3154                                 "- %s\n", be->dai_link->name);
3155
3156                 offset += snprintf(buf + offset, size - offset,
3157                                 "   State: %s\n",
3158                                 dpcm_state_string(be->dpcm[stream].state));
3159
3160                 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3161                     (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3162                         offset += snprintf(buf + offset, size - offset,
3163                                 "   Hardware Params: "
3164                                 "Format = %s, Channels = %d, Rate = %d\n",
3165                                 snd_pcm_format_name(params_format(params)),
3166                                 params_channels(params),
3167                                 params_rate(params));
3168         }
3169         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3170 out:
3171         return offset;
3172 }
3173
3174 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
3175                                 size_t count, loff_t *ppos)
3176 {
3177         struct snd_soc_pcm_runtime *fe = file->private_data;
3178         ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
3179         char *buf;
3180
3181         buf = kmalloc(out_count, GFP_KERNEL);
3182         if (!buf)
3183                 return -ENOMEM;
3184
3185         if (snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_PLAYBACK))
3186                 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
3187                                         buf + offset, out_count - offset);
3188
3189         if (snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_CAPTURE))
3190                 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE,
3191                                         buf + offset, out_count - offset);
3192
3193         ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
3194
3195         kfree(buf);
3196         return ret;
3197 }
3198
3199 static const struct file_operations dpcm_state_fops = {
3200         .open = simple_open,
3201         .read = dpcm_state_read_file,
3202         .llseek = default_llseek,
3203 };
3204
3205 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
3206 {
3207         if (!rtd->dai_link)
3208                 return;
3209
3210         if (!rtd->dai_link->dynamic)
3211                 return;
3212
3213         if (!rtd->card->debugfs_card_root)
3214                 return;
3215
3216         rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
3217                         rtd->card->debugfs_card_root);
3218
3219         debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root,
3220                             rtd, &dpcm_state_fops);
3221 }
3222 #endif