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_start(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         if (rtd->dai_link->ops->trigger) {
1060                 ret = rtd->dai_link->ops->trigger(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         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1078                 ret = snd_soc_dai_trigger(codec_dai, substream, cmd);
1079                 if (ret < 0)
1080                         return ret;
1081         }
1082
1083         return 0;
1084 }
1085
1086 static int soc_pcm_trigger_stop(struct snd_pcm_substream *substream, int cmd)
1087 {
1088         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1089         struct snd_soc_component *component;
1090         struct snd_soc_rtdcom_list *rtdcom;
1091         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1092         struct snd_soc_dai *codec_dai;
1093         int i, ret;
1094
1095         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1096                 ret = snd_soc_dai_trigger(codec_dai, substream, cmd);
1097                 if (ret < 0)
1098                         return ret;
1099         }
1100
1101         ret = snd_soc_dai_trigger(cpu_dai, substream, cmd);
1102         if (ret < 0)
1103                 return ret;
1104
1105         for_each_rtdcom(rtd, rtdcom) {
1106                 component = rtdcom->component;
1107
1108                 ret = snd_soc_component_trigger(component, substream, cmd);
1109                 if (ret < 0)
1110                         return ret;
1111         }
1112
1113         if (rtd->dai_link->ops->trigger) {
1114                 ret = rtd->dai_link->ops->trigger(substream, cmd);
1115                 if (ret < 0)
1116                         return ret;
1117         }
1118
1119         return 0;
1120 }
1121
1122 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
1123 {
1124         int ret;
1125
1126         switch (cmd) {
1127         case SNDRV_PCM_TRIGGER_START:
1128         case SNDRV_PCM_TRIGGER_RESUME:
1129         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1130                 ret = soc_pcm_trigger_start(substream, cmd);
1131                 break;
1132         case SNDRV_PCM_TRIGGER_STOP:
1133         case SNDRV_PCM_TRIGGER_SUSPEND:
1134         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1135                 ret = soc_pcm_trigger_stop(substream, cmd);
1136                 break;
1137         default:
1138                 return -EINVAL;
1139         }
1140
1141         return ret;
1142 }
1143
1144 static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
1145                                    int cmd)
1146 {
1147         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1148         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1149         struct snd_soc_dai *codec_dai;
1150         int i, ret;
1151
1152         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1153                 ret = snd_soc_dai_bespoke_trigger(codec_dai, substream, cmd);
1154                 if (ret < 0)
1155                         return ret;
1156         }
1157
1158         ret = snd_soc_dai_bespoke_trigger(cpu_dai, substream, cmd);
1159         if (ret < 0)
1160                 return ret;
1161
1162         return 0;
1163 }
1164 /*
1165  * soc level wrapper for pointer callback
1166  * If cpu_dai, codec_dai, component driver has the delay callback, then
1167  * the runtime->delay will be updated accordingly.
1168  */
1169 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1170 {
1171         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1172         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1173         struct snd_soc_dai *codec_dai;
1174         struct snd_pcm_runtime *runtime = substream->runtime;
1175         snd_pcm_uframes_t offset = 0;
1176         snd_pcm_sframes_t delay = 0;
1177         snd_pcm_sframes_t codec_delay = 0;
1178         int i;
1179
1180         /* clearing the previous total delay */
1181         runtime->delay = 0;
1182
1183         offset = snd_soc_pcm_component_pointer(substream);
1184
1185         /* base delay if assigned in pointer callback */
1186         delay = runtime->delay;
1187
1188         delay += snd_soc_dai_delay(cpu_dai, substream);
1189
1190         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1191                 codec_delay = max(codec_delay,
1192                                   snd_soc_dai_delay(codec_dai, substream));
1193         }
1194         delay += codec_delay;
1195
1196         runtime->delay = delay;
1197
1198         return offset;
1199 }
1200
1201 /* connect a FE and BE */
1202 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1203                 struct snd_soc_pcm_runtime *be, int stream)
1204 {
1205         struct snd_soc_dpcm *dpcm;
1206         unsigned long flags;
1207
1208         /* only add new dpcms */
1209         for_each_dpcm_be(fe, stream, dpcm) {
1210                 if (dpcm->be == be && dpcm->fe == fe)
1211                         return 0;
1212         }
1213
1214         dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1215         if (!dpcm)
1216                 return -ENOMEM;
1217
1218         dpcm->be = be;
1219         dpcm->fe = fe;
1220         be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
1221         dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1222         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1223         list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1224         list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1225         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1226
1227         dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1228                         stream ? "capture" : "playback",  fe->dai_link->name,
1229                         stream ? "<-" : "->", be->dai_link->name);
1230
1231 #ifdef CONFIG_DEBUG_FS
1232         dpcm->debugfs_state = debugfs_create_dir(be->dai_link->name,
1233                                                  fe->debugfs_dpcm_root);
1234         debugfs_create_u32("state", 0644, dpcm->debugfs_state, &dpcm->state);
1235 #endif
1236         return 1;
1237 }
1238
1239 /* reparent a BE onto another FE */
1240 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1241                         struct snd_soc_pcm_runtime *be, int stream)
1242 {
1243         struct snd_soc_dpcm *dpcm;
1244         struct snd_pcm_substream *fe_substream, *be_substream;
1245
1246         /* reparent if BE is connected to other FEs */
1247         if (!be->dpcm[stream].users)
1248                 return;
1249
1250         be_substream = snd_soc_dpcm_get_substream(be, stream);
1251
1252         for_each_dpcm_fe(be, stream, dpcm) {
1253                 if (dpcm->fe == fe)
1254                         continue;
1255
1256                 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1257                         stream ? "capture" : "playback",
1258                         dpcm->fe->dai_link->name,
1259                         stream ? "<-" : "->", dpcm->be->dai_link->name);
1260
1261                 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1262                 be_substream->runtime = fe_substream->runtime;
1263                 break;
1264         }
1265 }
1266
1267 /* disconnect a BE and FE */
1268 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1269 {
1270         struct snd_soc_dpcm *dpcm, *d;
1271         unsigned long flags;
1272
1273         for_each_dpcm_be_safe(fe, stream, dpcm, d) {
1274                 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1275                                 stream ? "capture" : "playback",
1276                                 dpcm->be->dai_link->name);
1277
1278                 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1279                         continue;
1280
1281                 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1282                         stream ? "capture" : "playback", fe->dai_link->name,
1283                         stream ? "<-" : "->", dpcm->be->dai_link->name);
1284
1285                 /* BEs still alive need new FE */
1286                 dpcm_be_reparent(fe, dpcm->be, stream);
1287
1288 #ifdef CONFIG_DEBUG_FS
1289                 debugfs_remove_recursive(dpcm->debugfs_state);
1290 #endif
1291                 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1292                 list_del(&dpcm->list_be);
1293                 list_del(&dpcm->list_fe);
1294                 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1295                 kfree(dpcm);
1296         }
1297 }
1298
1299 /* get BE for DAI widget and stream */
1300 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1301                 struct snd_soc_dapm_widget *widget, int stream)
1302 {
1303         struct snd_soc_pcm_runtime *be;
1304         struct snd_soc_dai *dai;
1305         int i;
1306
1307         dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name);
1308
1309         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1310                 for_each_card_rtds(card, be) {
1311
1312                         if (!be->dai_link->no_pcm)
1313                                 continue;
1314
1315                         dev_dbg(card->dev, "ASoC: try BE : %s\n",
1316                                 be->cpu_dai->playback_widget ?
1317                                 be->cpu_dai->playback_widget->name : "(not set)");
1318
1319                         if (be->cpu_dai->playback_widget == widget)
1320                                 return be;
1321
1322                         for_each_rtd_codec_dai(be, i, dai) {
1323                                 if (dai->playback_widget == widget)
1324                                         return be;
1325                         }
1326                 }
1327         } else {
1328
1329                 for_each_card_rtds(card, be) {
1330
1331                         if (!be->dai_link->no_pcm)
1332                                 continue;
1333
1334                         dev_dbg(card->dev, "ASoC: try BE %s\n",
1335                                 be->cpu_dai->capture_widget ?
1336                                 be->cpu_dai->capture_widget->name : "(not set)");
1337
1338                         if (be->cpu_dai->capture_widget == widget)
1339                                 return be;
1340
1341                         for_each_rtd_codec_dai(be, i, dai) {
1342                                 if (dai->capture_widget == widget)
1343                                         return be;
1344                         }
1345                 }
1346         }
1347
1348         /* dai link name and stream name set correctly ? */
1349         dev_err(card->dev, "ASoC: can't get %s BE for %s\n",
1350                 stream ? "capture" : "playback", widget->name);
1351         return NULL;
1352 }
1353
1354 static inline struct snd_soc_dapm_widget *
1355         dai_get_widget(struct snd_soc_dai *dai, int stream)
1356 {
1357         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1358                 return dai->playback_widget;
1359         else
1360                 return dai->capture_widget;
1361 }
1362
1363 static int widget_in_list(struct snd_soc_dapm_widget_list *list,
1364                 struct snd_soc_dapm_widget *widget)
1365 {
1366         int i;
1367
1368         for (i = 0; i < list->num_widgets; i++) {
1369                 if (widget == list->widgets[i])
1370                         return 1;
1371         }
1372
1373         return 0;
1374 }
1375
1376 static bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget,
1377                 enum snd_soc_dapm_direction dir)
1378 {
1379         struct snd_soc_card *card = widget->dapm->card;
1380         struct snd_soc_pcm_runtime *rtd;
1381         struct snd_soc_dai *dai;
1382         int i;
1383
1384         if (dir == SND_SOC_DAPM_DIR_OUT) {
1385                 for_each_card_rtds(card, rtd) {
1386                         if (!rtd->dai_link->no_pcm)
1387                                 continue;
1388
1389                         if (rtd->cpu_dai->playback_widget == widget)
1390                                 return true;
1391
1392                         for_each_rtd_codec_dai(rtd, i, dai) {
1393                                 if (dai->playback_widget == widget)
1394                                         return true;
1395                         }
1396                 }
1397         } else { /* SND_SOC_DAPM_DIR_IN */
1398                 for_each_card_rtds(card, rtd) {
1399                         if (!rtd->dai_link->no_pcm)
1400                                 continue;
1401
1402                         if (rtd->cpu_dai->capture_widget == widget)
1403                                 return true;
1404
1405                         for_each_rtd_codec_dai(rtd, i, dai) {
1406                                 if (dai->capture_widget == widget)
1407                                         return true;
1408                         }
1409                 }
1410         }
1411
1412         return false;
1413 }
1414
1415 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1416         int stream, struct snd_soc_dapm_widget_list **list)
1417 {
1418         struct snd_soc_dai *cpu_dai = fe->cpu_dai;
1419         int paths;
1420
1421         /* get number of valid DAI paths and their widgets */
1422         paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
1423                         dpcm_end_walk_at_be);
1424
1425         dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1426                         stream ? "capture" : "playback");
1427
1428         return paths;
1429 }
1430
1431 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1432         struct snd_soc_dapm_widget_list **list_)
1433 {
1434         struct snd_soc_dpcm *dpcm;
1435         struct snd_soc_dapm_widget_list *list = *list_;
1436         struct snd_soc_dapm_widget *widget;
1437         struct snd_soc_dai *dai;
1438         int prune = 0;
1439         int do_prune;
1440
1441         /* Destroy any old FE <--> BE connections */
1442         for_each_dpcm_be(fe, stream, dpcm) {
1443                 unsigned int i;
1444
1445                 /* is there a valid CPU DAI widget for this BE */
1446                 widget = dai_get_widget(dpcm->be->cpu_dai, stream);
1447
1448                 /* prune the BE if it's no longer in our active list */
1449                 if (widget && widget_in_list(list, widget))
1450                         continue;
1451
1452                 /* is there a valid CODEC DAI widget for this BE */
1453                 do_prune = 1;
1454                 for_each_rtd_codec_dai(dpcm->be, i, dai) {
1455                         widget = dai_get_widget(dai, stream);
1456
1457                         /* prune the BE if it's no longer in our active list */
1458                         if (widget && widget_in_list(list, widget))
1459                                 do_prune = 0;
1460                 }
1461                 if (!do_prune)
1462                         continue;
1463
1464                 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1465                         stream ? "capture" : "playback",
1466                         dpcm->be->dai_link->name, fe->dai_link->name);
1467                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1468                 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1469                 prune++;
1470         }
1471
1472         dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1473         return prune;
1474 }
1475
1476 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1477         struct snd_soc_dapm_widget_list **list_)
1478 {
1479         struct snd_soc_card *card = fe->card;
1480         struct snd_soc_dapm_widget_list *list = *list_;
1481         struct snd_soc_pcm_runtime *be;
1482         int i, new = 0, err;
1483
1484         /* Create any new FE <--> BE connections */
1485         for (i = 0; i < list->num_widgets; i++) {
1486
1487                 switch (list->widgets[i]->id) {
1488                 case snd_soc_dapm_dai_in:
1489                         if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1490                                 continue;
1491                         break;
1492                 case snd_soc_dapm_dai_out:
1493                         if (stream != SNDRV_PCM_STREAM_CAPTURE)
1494                                 continue;
1495                         break;
1496                 default:
1497                         continue;
1498                 }
1499
1500                 /* is there a valid BE rtd for this widget */
1501                 be = dpcm_get_be(card, list->widgets[i], stream);
1502                 if (!be) {
1503                         dev_err(fe->dev, "ASoC: no BE found for %s\n",
1504                                         list->widgets[i]->name);
1505                         continue;
1506                 }
1507
1508                 /* make sure BE is a real BE */
1509                 if (!be->dai_link->no_pcm)
1510                         continue;
1511
1512                 /* don't connect if FE is not running */
1513                 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
1514                         continue;
1515
1516                 /* newly connected FE and BE */
1517                 err = dpcm_be_connect(fe, be, stream);
1518                 if (err < 0) {
1519                         dev_err(fe->dev, "ASoC: can't connect %s\n",
1520                                 list->widgets[i]->name);
1521                         break;
1522                 } else if (err == 0) /* already connected */
1523                         continue;
1524
1525                 /* new */
1526                 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1527                 new++;
1528         }
1529
1530         dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1531         return new;
1532 }
1533
1534 /*
1535  * Find the corresponding BE DAIs that source or sink audio to this
1536  * FE substream.
1537  */
1538 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1539         int stream, struct snd_soc_dapm_widget_list **list, int new)
1540 {
1541         if (new)
1542                 return dpcm_add_paths(fe, stream, list);
1543         else
1544                 return dpcm_prune_paths(fe, stream, list);
1545 }
1546
1547 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1548 {
1549         struct snd_soc_dpcm *dpcm;
1550         unsigned long flags;
1551
1552         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1553         for_each_dpcm_be(fe, stream, dpcm)
1554                 dpcm->be->dpcm[stream].runtime_update =
1555                                                 SND_SOC_DPCM_UPDATE_NO;
1556         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1557 }
1558
1559 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
1560         int stream)
1561 {
1562         struct snd_soc_dpcm *dpcm;
1563
1564         /* disable any enabled and non active backends */
1565         for_each_dpcm_be(fe, stream, dpcm) {
1566
1567                 struct snd_soc_pcm_runtime *be = dpcm->be;
1568                 struct snd_pcm_substream *be_substream =
1569                         snd_soc_dpcm_get_substream(be, stream);
1570
1571                 if (be->dpcm[stream].users == 0)
1572                         dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1573                                 stream ? "capture" : "playback",
1574                                 be->dpcm[stream].state);
1575
1576                 if (--be->dpcm[stream].users != 0)
1577                         continue;
1578
1579                 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1580                         continue;
1581
1582                 soc_pcm_close(be_substream);
1583                 be_substream->runtime = NULL;
1584                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1585         }
1586 }
1587
1588 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1589 {
1590         struct snd_soc_dpcm *dpcm;
1591         int err, count = 0;
1592
1593         /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1594         for_each_dpcm_be(fe, stream, dpcm) {
1595
1596                 struct snd_soc_pcm_runtime *be = dpcm->be;
1597                 struct snd_pcm_substream *be_substream =
1598                         snd_soc_dpcm_get_substream(be, stream);
1599
1600                 if (!be_substream) {
1601                         dev_err(be->dev, "ASoC: no backend %s stream\n",
1602                                 stream ? "capture" : "playback");
1603                         continue;
1604                 }
1605
1606                 /* is this op for this BE ? */
1607                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1608                         continue;
1609
1610                 /* first time the dpcm is open ? */
1611                 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
1612                         dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1613                                 stream ? "capture" : "playback",
1614                                 be->dpcm[stream].state);
1615
1616                 if (be->dpcm[stream].users++ != 0)
1617                         continue;
1618
1619                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1620                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1621                         continue;
1622
1623                 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1624                         stream ? "capture" : "playback", be->dai_link->name);
1625
1626                 be_substream->runtime = be->dpcm[stream].runtime;
1627                 err = soc_pcm_open(be_substream);
1628                 if (err < 0) {
1629                         dev_err(be->dev, "ASoC: BE open failed %d\n", err);
1630                         be->dpcm[stream].users--;
1631                         if (be->dpcm[stream].users < 0)
1632                                 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1633                                         stream ? "capture" : "playback",
1634                                         be->dpcm[stream].state);
1635
1636                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1637                         goto unwind;
1638                 }
1639
1640                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1641                 count++;
1642         }
1643
1644         return count;
1645
1646 unwind:
1647         /* disable any enabled and non active backends */
1648         for_each_dpcm_be_rollback(fe, stream, dpcm) {
1649                 struct snd_soc_pcm_runtime *be = dpcm->be;
1650                 struct snd_pcm_substream *be_substream =
1651                         snd_soc_dpcm_get_substream(be, stream);
1652
1653                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1654                         continue;
1655
1656                 if (be->dpcm[stream].users == 0)
1657                         dev_err(be->dev, "ASoC: no users %s at close %d\n",
1658                                 stream ? "capture" : "playback",
1659                                 be->dpcm[stream].state);
1660
1661                 if (--be->dpcm[stream].users != 0)
1662                         continue;
1663
1664                 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1665                         continue;
1666
1667                 soc_pcm_close(be_substream);
1668                 be_substream->runtime = NULL;
1669                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1670         }
1671
1672         return err;
1673 }
1674
1675 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
1676                                  struct snd_soc_pcm_stream *stream)
1677 {
1678         runtime->hw.rate_min = stream->rate_min;
1679         runtime->hw.rate_max = min_not_zero(stream->rate_max, UINT_MAX);
1680         runtime->hw.channels_min = stream->channels_min;
1681         runtime->hw.channels_max = stream->channels_max;
1682         if (runtime->hw.formats)
1683                 runtime->hw.formats &= stream->formats;
1684         else
1685                 runtime->hw.formats = stream->formats;
1686         runtime->hw.rates = stream->rates;
1687 }
1688
1689 static void dpcm_runtime_merge_format(struct snd_pcm_substream *substream,
1690                                       u64 *formats)
1691 {
1692         struct snd_soc_pcm_runtime *fe = substream->private_data;
1693         struct snd_soc_dpcm *dpcm;
1694         struct snd_soc_dai *dai;
1695         int stream = substream->stream;
1696
1697         if (!fe->dai_link->dpcm_merged_format)
1698                 return;
1699
1700         /*
1701          * It returns merged BE codec format
1702          * if FE want to use it (= dpcm_merged_format)
1703          */
1704
1705         for_each_dpcm_be(fe, stream, dpcm) {
1706                 struct snd_soc_pcm_runtime *be = dpcm->be;
1707                 struct snd_soc_dai_driver *codec_dai_drv;
1708                 struct snd_soc_pcm_stream *codec_stream;
1709                 int i;
1710
1711                 for_each_rtd_codec_dai(be, i, dai) {
1712                         /*
1713                          * Skip CODECs which don't support the current stream
1714                          * type. See soc_pcm_init_runtime_hw() for more details
1715                          */
1716                         if (!snd_soc_dai_stream_valid(dai, stream))
1717                                 continue;
1718
1719                         codec_dai_drv = dai->driver;
1720                         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1721                                 codec_stream = &codec_dai_drv->playback;
1722                         else
1723                                 codec_stream = &codec_dai_drv->capture;
1724
1725                         *formats &= codec_stream->formats;
1726                 }
1727         }
1728 }
1729
1730 static void dpcm_runtime_merge_chan(struct snd_pcm_substream *substream,
1731                                     unsigned int *channels_min,
1732                                     unsigned int *channels_max)
1733 {
1734         struct snd_soc_pcm_runtime *fe = substream->private_data;
1735         struct snd_soc_dpcm *dpcm;
1736         int stream = substream->stream;
1737
1738         if (!fe->dai_link->dpcm_merged_chan)
1739                 return;
1740
1741         /*
1742          * It returns merged BE codec channel;
1743          * if FE want to use it (= dpcm_merged_chan)
1744          */
1745
1746         for_each_dpcm_be(fe, stream, dpcm) {
1747                 struct snd_soc_pcm_runtime *be = dpcm->be;
1748                 struct snd_soc_dai_driver *cpu_dai_drv =  be->cpu_dai->driver;
1749                 struct snd_soc_dai_driver *codec_dai_drv;
1750                 struct snd_soc_pcm_stream *codec_stream;
1751                 struct snd_soc_pcm_stream *cpu_stream;
1752
1753                 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1754                         cpu_stream = &cpu_dai_drv->playback;
1755                 else
1756                         cpu_stream = &cpu_dai_drv->capture;
1757
1758                 *channels_min = max(*channels_min, cpu_stream->channels_min);
1759                 *channels_max = min(*channels_max, cpu_stream->channels_max);
1760
1761                 /*
1762                  * chan min/max cannot be enforced if there are multiple CODEC
1763                  * DAIs connected to a single CPU DAI, use CPU DAI's directly
1764                  */
1765                 if (be->num_codecs == 1) {
1766                         codec_dai_drv = be->codec_dais[0]->driver;
1767
1768                         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1769                                 codec_stream = &codec_dai_drv->playback;
1770                         else
1771                                 codec_stream = &codec_dai_drv->capture;
1772
1773                         *channels_min = max(*channels_min,
1774                                             codec_stream->channels_min);
1775                         *channels_max = min(*channels_max,
1776                                             codec_stream->channels_max);
1777                 }
1778         }
1779 }
1780
1781 static void dpcm_runtime_merge_rate(struct snd_pcm_substream *substream,
1782                                     unsigned int *rates,
1783                                     unsigned int *rate_min,
1784                                     unsigned int *rate_max)
1785 {
1786         struct snd_soc_pcm_runtime *fe = substream->private_data;
1787         struct snd_soc_dpcm *dpcm;
1788         int stream = substream->stream;
1789
1790         if (!fe->dai_link->dpcm_merged_rate)
1791                 return;
1792
1793         /*
1794          * It returns merged BE codec channel;
1795          * if FE want to use it (= dpcm_merged_chan)
1796          */
1797
1798         for_each_dpcm_be(fe, stream, dpcm) {
1799                 struct snd_soc_pcm_runtime *be = dpcm->be;
1800                 struct snd_soc_dai_driver *cpu_dai_drv =  be->cpu_dai->driver;
1801                 struct snd_soc_dai_driver *codec_dai_drv;
1802                 struct snd_soc_pcm_stream *codec_stream;
1803                 struct snd_soc_pcm_stream *cpu_stream;
1804                 struct snd_soc_dai *dai;
1805                 int i;
1806
1807                 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1808                         cpu_stream = &cpu_dai_drv->playback;
1809                 else
1810                         cpu_stream = &cpu_dai_drv->capture;
1811
1812                 *rate_min = max(*rate_min, cpu_stream->rate_min);
1813                 *rate_max = min_not_zero(*rate_max, cpu_stream->rate_max);
1814                 *rates = snd_pcm_rate_mask_intersect(*rates, cpu_stream->rates);
1815
1816                 for_each_rtd_codec_dai(be, i, dai) {
1817                         /*
1818                          * Skip CODECs which don't support the current stream
1819                          * type. See soc_pcm_init_runtime_hw() for more details
1820                          */
1821                         if (!snd_soc_dai_stream_valid(dai, stream))
1822                                 continue;
1823
1824                         codec_dai_drv = dai->driver;
1825                         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1826                                 codec_stream = &codec_dai_drv->playback;
1827                         else
1828                                 codec_stream = &codec_dai_drv->capture;
1829
1830                         *rate_min = max(*rate_min, codec_stream->rate_min);
1831                         *rate_max = min_not_zero(*rate_max,
1832                                                  codec_stream->rate_max);
1833                         *rates = snd_pcm_rate_mask_intersect(*rates,
1834                                                 codec_stream->rates);
1835                 }
1836         }
1837 }
1838
1839 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
1840 {
1841         struct snd_pcm_runtime *runtime = substream->runtime;
1842         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1843         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1844         struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
1845
1846         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1847                 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback);
1848         else
1849                 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture);
1850
1851         dpcm_runtime_merge_format(substream, &runtime->hw.formats);
1852         dpcm_runtime_merge_chan(substream, &runtime->hw.channels_min,
1853                                 &runtime->hw.channels_max);
1854         dpcm_runtime_merge_rate(substream, &runtime->hw.rates,
1855                                 &runtime->hw.rate_min, &runtime->hw.rate_max);
1856 }
1857
1858 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
1859
1860 /* Set FE's runtime_update state; the state is protected via PCM stream lock
1861  * for avoiding the race with trigger callback.
1862  * If the state is unset and a trigger is pending while the previous operation,
1863  * process the pending trigger action here.
1864  */
1865 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
1866                                      int stream, enum snd_soc_dpcm_update state)
1867 {
1868         struct snd_pcm_substream *substream =
1869                 snd_soc_dpcm_get_substream(fe, stream);
1870
1871         snd_pcm_stream_lock_irq(substream);
1872         if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
1873                 dpcm_fe_dai_do_trigger(substream,
1874                                        fe->dpcm[stream].trigger_pending - 1);
1875                 fe->dpcm[stream].trigger_pending = 0;
1876         }
1877         fe->dpcm[stream].runtime_update = state;
1878         snd_pcm_stream_unlock_irq(substream);
1879 }
1880
1881 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
1882                                int stream)
1883 {
1884         struct snd_soc_dpcm *dpcm;
1885         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1886         struct snd_soc_dai *fe_cpu_dai = fe->cpu_dai;
1887         int err;
1888
1889         /* apply symmetry for FE */
1890         if (soc_pcm_has_symmetry(fe_substream))
1891                 fe_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1892
1893         /* Symmetry only applies if we've got an active stream. */
1894         if (fe_cpu_dai->active) {
1895                 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
1896                 if (err < 0)
1897                         return err;
1898         }
1899
1900         /* apply symmetry for BE */
1901         for_each_dpcm_be(fe, stream, dpcm) {
1902                 struct snd_soc_pcm_runtime *be = dpcm->be;
1903                 struct snd_pcm_substream *be_substream =
1904                         snd_soc_dpcm_get_substream(be, stream);
1905                 struct snd_soc_pcm_runtime *rtd;
1906                 struct snd_soc_dai *codec_dai;
1907                 int i;
1908
1909                 /* A backend may not have the requested substream */
1910                 if (!be_substream)
1911                         continue;
1912
1913                 rtd = be_substream->private_data;
1914                 if (rtd->dai_link->be_hw_params_fixup)
1915                         continue;
1916
1917                 if (soc_pcm_has_symmetry(be_substream))
1918                         be_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1919
1920                 /* Symmetry only applies if we've got an active stream. */
1921                 if (rtd->cpu_dai->active) {
1922                         err = soc_pcm_apply_symmetry(fe_substream,
1923                                                      rtd->cpu_dai);
1924                         if (err < 0)
1925                                 return err;
1926                 }
1927
1928                 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1929                         if (codec_dai->active) {
1930                                 err = soc_pcm_apply_symmetry(fe_substream,
1931                                                              codec_dai);
1932                                 if (err < 0)
1933                                         return err;
1934                         }
1935                 }
1936         }
1937
1938         return 0;
1939 }
1940
1941 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1942 {
1943         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1944         struct snd_pcm_runtime *runtime = fe_substream->runtime;
1945         int stream = fe_substream->stream, ret = 0;
1946
1947         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1948
1949         ret = dpcm_be_dai_startup(fe, fe_substream->stream);
1950         if (ret < 0) {
1951                 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
1952                 goto be_err;
1953         }
1954
1955         dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1956
1957         /* start the DAI frontend */
1958         ret = soc_pcm_open(fe_substream);
1959         if (ret < 0) {
1960                 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
1961                 goto unwind;
1962         }
1963
1964         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1965
1966         dpcm_set_fe_runtime(fe_substream);
1967         snd_pcm_limit_hw_rates(runtime);
1968
1969         ret = dpcm_apply_symmetry(fe_substream, stream);
1970         if (ret < 0) {
1971                 dev_err(fe->dev, "ASoC: failed to apply dpcm symmetry %d\n",
1972                         ret);
1973                 goto unwind;
1974         }
1975
1976         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1977         return 0;
1978
1979 unwind:
1980         dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
1981 be_err:
1982         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1983         return ret;
1984 }
1985
1986 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1987 {
1988         struct snd_soc_dpcm *dpcm;
1989
1990         /* only shutdown BEs that are either sinks or sources to this FE DAI */
1991         for_each_dpcm_be(fe, stream, dpcm) {
1992
1993                 struct snd_soc_pcm_runtime *be = dpcm->be;
1994                 struct snd_pcm_substream *be_substream =
1995                         snd_soc_dpcm_get_substream(be, stream);
1996
1997                 /* is this op for this BE ? */
1998                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1999                         continue;
2000
2001                 if (be->dpcm[stream].users == 0)
2002                         dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
2003                                 stream ? "capture" : "playback",
2004                                 be->dpcm[stream].state);
2005
2006                 if (--be->dpcm[stream].users != 0)
2007                         continue;
2008
2009                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2010                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)) {
2011                         soc_pcm_hw_free(be_substream);
2012                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2013                 }
2014
2015                 dev_dbg(be->dev, "ASoC: close BE %s\n",
2016                         be->dai_link->name);
2017
2018                 soc_pcm_close(be_substream);
2019                 be_substream->runtime = NULL;
2020
2021                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
2022         }
2023         return 0;
2024 }
2025
2026 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
2027 {
2028         struct snd_soc_pcm_runtime *fe = substream->private_data;
2029         int stream = substream->stream;
2030
2031         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2032
2033         /* shutdown the BEs */
2034         dpcm_be_dai_shutdown(fe, substream->stream);
2035
2036         dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
2037
2038         /* now shutdown the frontend */
2039         soc_pcm_close(substream);
2040
2041         /* run the stream event for each BE */
2042         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
2043
2044         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
2045         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2046         return 0;
2047 }
2048
2049 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
2050 {
2051         struct snd_soc_dpcm *dpcm;
2052
2053         /* only hw_params backends that are either sinks or sources
2054          * to this frontend DAI */
2055         for_each_dpcm_be(fe, stream, dpcm) {
2056
2057                 struct snd_soc_pcm_runtime *be = dpcm->be;
2058                 struct snd_pcm_substream *be_substream =
2059                         snd_soc_dpcm_get_substream(be, stream);
2060
2061                 /* is this op for this BE ? */
2062                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2063                         continue;
2064
2065                 /* only free hw when no longer used - check all FEs */
2066                 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2067                                 continue;
2068
2069                 /* do not free hw if this BE is used by other FE */
2070                 if (be->dpcm[stream].users > 1)
2071                         continue;
2072
2073                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2074                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2075                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2076                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
2077                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2078                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2079                         continue;
2080
2081                 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
2082                         be->dai_link->name);
2083
2084                 soc_pcm_hw_free(be_substream);
2085
2086                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2087         }
2088
2089         return 0;
2090 }
2091
2092 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
2093 {
2094         struct snd_soc_pcm_runtime *fe = substream->private_data;
2095         int err, stream = substream->stream;
2096
2097         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2098         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2099
2100         dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
2101
2102         /* call hw_free on the frontend */
2103         err = soc_pcm_hw_free(substream);
2104         if (err < 0)
2105                 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
2106                         fe->dai_link->name);
2107
2108         /* only hw_params backends that are either sinks or sources
2109          * to this frontend DAI */
2110         err = dpcm_be_dai_hw_free(fe, stream);
2111
2112         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2113         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2114
2115         mutex_unlock(&fe->card->mutex);
2116         return 0;
2117 }
2118
2119 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
2120 {
2121         struct snd_soc_dpcm *dpcm;
2122         int ret;
2123
2124         for_each_dpcm_be(fe, stream, dpcm) {
2125
2126                 struct snd_soc_pcm_runtime *be = dpcm->be;
2127                 struct snd_pcm_substream *be_substream =
2128                         snd_soc_dpcm_get_substream(be, stream);
2129
2130                 /* is this op for this BE ? */
2131                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2132                         continue;
2133
2134                 /* copy params for each dpcm */
2135                 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
2136                                 sizeof(struct snd_pcm_hw_params));
2137
2138                 /* perform any hw_params fixups */
2139                 if (be->dai_link->be_hw_params_fixup) {
2140                         ret = be->dai_link->be_hw_params_fixup(be,
2141                                         &dpcm->hw_params);
2142                         if (ret < 0) {
2143                                 dev_err(be->dev,
2144                                         "ASoC: hw_params BE fixup failed %d\n",
2145                                         ret);
2146                                 goto unwind;
2147                         }
2148                 }
2149
2150                 /* copy the fixed-up hw params for BE dai */
2151                 memcpy(&be->dpcm[stream].hw_params, &dpcm->hw_params,
2152                        sizeof(struct snd_pcm_hw_params));
2153
2154                 /* only allow hw_params() if no connected FEs are running */
2155                 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
2156                         continue;
2157
2158                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2159                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2160                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
2161                         continue;
2162
2163                 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
2164                         be->dai_link->name);
2165
2166                 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
2167                 if (ret < 0) {
2168                         dev_err(dpcm->be->dev,
2169                                 "ASoC: hw_params BE failed %d\n", ret);
2170                         goto unwind;
2171                 }
2172
2173                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2174         }
2175         return 0;
2176
2177 unwind:
2178         /* disable any enabled and non active backends */
2179         for_each_dpcm_be_rollback(fe, stream, dpcm) {
2180                 struct snd_soc_pcm_runtime *be = dpcm->be;
2181                 struct snd_pcm_substream *be_substream =
2182                         snd_soc_dpcm_get_substream(be, stream);
2183
2184                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2185                         continue;
2186
2187                 /* only allow hw_free() if no connected FEs are running */
2188                 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2189                         continue;
2190
2191                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2192                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2193                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2194                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2195                         continue;
2196
2197                 soc_pcm_hw_free(be_substream);
2198         }
2199
2200         return ret;
2201 }
2202
2203 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
2204                                  struct snd_pcm_hw_params *params)
2205 {
2206         struct snd_soc_pcm_runtime *fe = substream->private_data;
2207         int ret, stream = substream->stream;
2208
2209         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2210         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2211
2212         memcpy(&fe->dpcm[substream->stream].hw_params, params,
2213                         sizeof(struct snd_pcm_hw_params));
2214         ret = dpcm_be_dai_hw_params(fe, substream->stream);
2215         if (ret < 0) {
2216                 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
2217                 goto out;
2218         }
2219
2220         dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
2221                         fe->dai_link->name, params_rate(params),
2222                         params_channels(params), params_format(params));
2223
2224         /* call hw_params on the frontend */
2225         ret = soc_pcm_hw_params(substream, params);
2226         if (ret < 0) {
2227                 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
2228                 dpcm_be_dai_hw_free(fe, stream);
2229          } else
2230                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2231
2232 out:
2233         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2234         mutex_unlock(&fe->card->mutex);
2235         return ret;
2236 }
2237
2238 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
2239                 struct snd_pcm_substream *substream, int cmd)
2240 {
2241         int ret;
2242
2243         dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n",
2244                         dpcm->be->dai_link->name, cmd);
2245
2246         ret = soc_pcm_trigger(substream, cmd);
2247         if (ret < 0)
2248                 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret);
2249
2250         return ret;
2251 }
2252
2253 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
2254                                int cmd)
2255 {
2256         struct snd_soc_dpcm *dpcm;
2257         int ret = 0;
2258
2259         for_each_dpcm_be(fe, stream, dpcm) {
2260
2261                 struct snd_soc_pcm_runtime *be = dpcm->be;
2262                 struct snd_pcm_substream *be_substream =
2263                         snd_soc_dpcm_get_substream(be, stream);
2264
2265                 /* is this op for this BE ? */
2266                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2267                         continue;
2268
2269                 switch (cmd) {
2270                 case SNDRV_PCM_TRIGGER_START:
2271                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2272                             (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2273                                 continue;
2274
2275                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2276                         if (ret)
2277                                 return ret;
2278
2279                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2280                         break;
2281                 case SNDRV_PCM_TRIGGER_RESUME:
2282                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2283                                 continue;
2284
2285                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2286                         if (ret)
2287                                 return ret;
2288
2289                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2290                         break;
2291                 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2292                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2293                                 continue;
2294
2295                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2296                         if (ret)
2297                                 return ret;
2298
2299                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2300                         break;
2301                 case SNDRV_PCM_TRIGGER_STOP:
2302                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2303                                 continue;
2304
2305                         if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2306                                 continue;
2307
2308                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2309                         if (ret)
2310                                 return ret;
2311
2312                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2313                         break;
2314                 case SNDRV_PCM_TRIGGER_SUSPEND:
2315                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2316                                 continue;
2317
2318                         if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2319                                 continue;
2320
2321                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2322                         if (ret)
2323                                 return ret;
2324
2325                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
2326                         break;
2327                 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2328                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2329                                 continue;
2330
2331                         if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2332                                 continue;
2333
2334                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2335                         if (ret)
2336                                 return ret;
2337
2338                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2339                         break;
2340                 }
2341         }
2342
2343         return ret;
2344 }
2345 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2346
2347 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
2348 {
2349         struct snd_soc_pcm_runtime *fe = substream->private_data;
2350         int stream = substream->stream, ret;
2351         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2352
2353         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2354
2355         switch (trigger) {
2356         case SND_SOC_DPCM_TRIGGER_PRE:
2357                 /* call trigger on the frontend before the backend. */
2358
2359                 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2360                                 fe->dai_link->name, cmd);
2361
2362                 ret = soc_pcm_trigger(substream, cmd);
2363                 if (ret < 0) {
2364                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2365                         goto out;
2366                 }
2367
2368                 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2369                 break;
2370         case SND_SOC_DPCM_TRIGGER_POST:
2371                 /* call trigger on the frontend after the backend. */
2372
2373                 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2374                 if (ret < 0) {
2375                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2376                         goto out;
2377                 }
2378
2379                 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2380                                 fe->dai_link->name, cmd);
2381
2382                 ret = soc_pcm_trigger(substream, cmd);
2383                 break;
2384         case SND_SOC_DPCM_TRIGGER_BESPOKE:
2385                 /* bespoke trigger() - handles both FE and BEs */
2386
2387                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
2388                                 fe->dai_link->name, cmd);
2389
2390                 ret = soc_pcm_bespoke_trigger(substream, cmd);
2391                 if (ret < 0) {
2392                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2393                         goto out;
2394                 }
2395                 break;
2396         default:
2397                 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
2398                                 fe->dai_link->name);
2399                 ret = -EINVAL;
2400                 goto out;
2401         }
2402
2403         switch (cmd) {
2404         case SNDRV_PCM_TRIGGER_START:
2405         case SNDRV_PCM_TRIGGER_RESUME:
2406         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2407                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2408                 break;
2409         case SNDRV_PCM_TRIGGER_STOP:
2410         case SNDRV_PCM_TRIGGER_SUSPEND:
2411                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2412                 break;
2413         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2414                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2415                 break;
2416         }
2417
2418 out:
2419         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2420         return ret;
2421 }
2422
2423 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2424 {
2425         struct snd_soc_pcm_runtime *fe = substream->private_data;
2426         int stream = substream->stream;
2427
2428         /* if FE's runtime_update is already set, we're in race;
2429          * process this trigger later at exit
2430          */
2431         if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2432                 fe->dpcm[stream].trigger_pending = cmd + 1;
2433                 return 0; /* delayed, assuming it's successful */
2434         }
2435
2436         /* we're alone, let's trigger */
2437         return dpcm_fe_dai_do_trigger(substream, cmd);
2438 }
2439
2440 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2441 {
2442         struct snd_soc_dpcm *dpcm;
2443         int ret = 0;
2444
2445         for_each_dpcm_be(fe, stream, dpcm) {
2446
2447                 struct snd_soc_pcm_runtime *be = dpcm->be;
2448                 struct snd_pcm_substream *be_substream =
2449                         snd_soc_dpcm_get_substream(be, stream);
2450
2451                 /* is this op for this BE ? */
2452                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2453                         continue;
2454
2455                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2456                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2457                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) &&
2458                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2459                         continue;
2460
2461                 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2462                         be->dai_link->name);
2463
2464                 ret = soc_pcm_prepare(be_substream);
2465                 if (ret < 0) {
2466                         dev_err(be->dev, "ASoC: backend prepare failed %d\n",
2467                                 ret);
2468                         break;
2469                 }
2470
2471                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2472         }
2473         return ret;
2474 }
2475
2476 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2477 {
2478         struct snd_soc_pcm_runtime *fe = substream->private_data;
2479         int stream = substream->stream, ret = 0;
2480
2481         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2482
2483         dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2484
2485         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2486
2487         /* there is no point preparing this FE if there are no BEs */
2488         if (list_empty(&fe->dpcm[stream].be_clients)) {
2489                 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2490                                 fe->dai_link->name);
2491                 ret = -EINVAL;
2492                 goto out;
2493         }
2494
2495         ret = dpcm_be_dai_prepare(fe, substream->stream);
2496         if (ret < 0)
2497                 goto out;
2498
2499         /* call prepare on the frontend */
2500         ret = soc_pcm_prepare(substream);
2501         if (ret < 0) {
2502                 dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
2503                         fe->dai_link->name);
2504                 goto out;
2505         }
2506
2507         /* run the stream event for each BE */
2508         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
2509         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2510
2511 out:
2512         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2513         mutex_unlock(&fe->card->mutex);
2514
2515         return ret;
2516 }
2517
2518 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2519 {
2520         struct snd_pcm_substream *substream =
2521                 snd_soc_dpcm_get_substream(fe, stream);
2522         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2523         int err;
2524
2525         dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2526                         stream ? "capture" : "playback", fe->dai_link->name);
2527
2528         if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2529                 /* call bespoke trigger - FE takes care of all BE triggers */
2530                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2531                                 fe->dai_link->name);
2532
2533                 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2534                 if (err < 0)
2535                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2536         } else {
2537                 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2538                         fe->dai_link->name);
2539
2540                 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2541                 if (err < 0)
2542                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2543         }
2544
2545         err = dpcm_be_dai_hw_free(fe, stream);
2546         if (err < 0)
2547                 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
2548
2549         err = dpcm_be_dai_shutdown(fe, stream);
2550         if (err < 0)
2551                 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
2552
2553         /* run the stream event for each BE */
2554         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2555
2556         return 0;
2557 }
2558
2559 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2560 {
2561         struct snd_pcm_substream *substream =
2562                 snd_soc_dpcm_get_substream(fe, stream);
2563         struct snd_soc_dpcm *dpcm;
2564         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2565         int ret;
2566         unsigned long flags;
2567
2568         dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2569                         stream ? "capture" : "playback", fe->dai_link->name);
2570
2571         /* Only start the BE if the FE is ready */
2572         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2573                 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
2574                 return -EINVAL;
2575
2576         /* startup must always be called for new BEs */
2577         ret = dpcm_be_dai_startup(fe, stream);
2578         if (ret < 0)
2579                 goto disconnect;
2580
2581         /* keep going if FE state is > open */
2582         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2583                 return 0;
2584
2585         ret = dpcm_be_dai_hw_params(fe, stream);
2586         if (ret < 0)
2587                 goto close;
2588
2589         /* keep going if FE state is > hw_params */
2590         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2591                 return 0;
2592
2593
2594         ret = dpcm_be_dai_prepare(fe, stream);
2595         if (ret < 0)
2596                 goto hw_free;
2597
2598         /* run the stream event for each BE */
2599         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2600
2601         /* keep going if FE state is > prepare */
2602         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2603                 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2604                 return 0;
2605
2606         if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2607                 /* call trigger on the frontend - FE takes care of all BE triggers */
2608                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
2609                                 fe->dai_link->name);
2610
2611                 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2612                 if (ret < 0) {
2613                         dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
2614                         goto hw_free;
2615                 }
2616         } else {
2617                 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2618                         fe->dai_link->name);
2619
2620                 ret = dpcm_be_dai_trigger(fe, stream,
2621                                         SNDRV_PCM_TRIGGER_START);
2622                 if (ret < 0) {
2623                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2624                         goto hw_free;
2625                 }
2626         }
2627
2628         return 0;
2629
2630 hw_free:
2631         dpcm_be_dai_hw_free(fe, stream);
2632 close:
2633         dpcm_be_dai_shutdown(fe, stream);
2634 disconnect:
2635         /* disconnect any non started BEs */
2636         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
2637         for_each_dpcm_be(fe, stream, dpcm) {
2638                 struct snd_soc_pcm_runtime *be = dpcm->be;
2639                 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2640                                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2641         }
2642         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
2643
2644         return ret;
2645 }
2646
2647 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
2648 {
2649         int ret;
2650
2651         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2652         ret = dpcm_run_update_startup(fe, stream);
2653         if (ret < 0)
2654                 dev_err(fe->dev, "ASoC: failed to startup some BEs\n");
2655         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2656
2657         return ret;
2658 }
2659
2660 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
2661 {
2662         int ret;
2663
2664         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2665         ret = dpcm_run_update_shutdown(fe, stream);
2666         if (ret < 0)
2667                 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
2668         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2669
2670         return ret;
2671 }
2672
2673 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new)
2674 {
2675         struct snd_soc_dapm_widget_list *list;
2676         int count, paths;
2677
2678         if (!fe->dai_link->dynamic)
2679                 return 0;
2680
2681         /* only check active links */
2682         if (!fe->cpu_dai->active)
2683                 return 0;
2684
2685         /* DAPM sync will call this to update DSP paths */
2686         dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n",
2687                 new ? "new" : "old", fe->dai_link->name);
2688
2689         /* skip if FE doesn't have playback capability */
2690         if (!snd_soc_dai_stream_valid(fe->cpu_dai,   SNDRV_PCM_STREAM_PLAYBACK) ||
2691             !snd_soc_dai_stream_valid(fe->codec_dai, SNDRV_PCM_STREAM_PLAYBACK))
2692                 goto capture;
2693
2694         /* skip if FE isn't currently playing */
2695         if (!fe->cpu_dai->playback_active || !fe->codec_dai->playback_active)
2696                 goto capture;
2697
2698         paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
2699         if (paths < 0) {
2700                 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2701                          fe->dai_link->name,  "playback");
2702                 return paths;
2703         }
2704
2705         /* update any playback paths */
2706         count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, new);
2707         if (count) {
2708                 if (new)
2709                         dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2710                 else
2711                         dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2712
2713                 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2714                 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2715         }
2716
2717         dpcm_path_put(&list);
2718
2719 capture:
2720         /* skip if FE doesn't have capture capability */
2721         if (!snd_soc_dai_stream_valid(fe->cpu_dai,   SNDRV_PCM_STREAM_CAPTURE) ||
2722             !snd_soc_dai_stream_valid(fe->codec_dai, SNDRV_PCM_STREAM_CAPTURE))
2723                 return 0;
2724
2725         /* skip if FE isn't currently capturing */
2726         if (!fe->cpu_dai->capture_active || !fe->codec_dai->capture_active)
2727                 return 0;
2728
2729         paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
2730         if (paths < 0) {
2731                 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2732                          fe->dai_link->name,  "capture");
2733                 return paths;
2734         }
2735
2736         /* update any old capture paths */
2737         count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, new);
2738         if (count) {
2739                 if (new)
2740                         dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2741                 else
2742                         dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2743
2744                 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2745                 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2746         }
2747
2748         dpcm_path_put(&list);
2749
2750         return 0;
2751 }
2752
2753 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2754  * any DAI links.
2755  */
2756 int soc_dpcm_runtime_update(struct snd_soc_card *card)
2757 {
2758         struct snd_soc_pcm_runtime *fe;
2759         int ret = 0;
2760
2761         mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2762         /* shutdown all old paths first */
2763         for_each_card_rtds(card, fe) {
2764                 ret = soc_dpcm_fe_runtime_update(fe, 0);
2765                 if (ret)
2766                         goto out;
2767         }
2768
2769         /* bring new paths up */
2770         for_each_card_rtds(card, fe) {
2771                 ret = soc_dpcm_fe_runtime_update(fe, 1);
2772                 if (ret)
2773                         goto out;
2774         }
2775
2776 out:
2777         mutex_unlock(&card->mutex);
2778         return ret;
2779 }
2780 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
2781 {
2782         struct snd_soc_dpcm *dpcm;
2783         struct snd_soc_dai *dai;
2784
2785         for_each_dpcm_be(fe, SNDRV_PCM_STREAM_PLAYBACK, dpcm) {
2786
2787                 struct snd_soc_pcm_runtime *be = dpcm->be;
2788                 int i;
2789
2790                 if (be->dai_link->ignore_suspend)
2791                         continue;
2792
2793                 for_each_rtd_codec_dai(be, i, dai) {
2794                         struct snd_soc_dai_driver *drv = dai->driver;
2795
2796                         dev_dbg(be->dev, "ASoC: BE digital mute %s\n",
2797                                          be->dai_link->name);
2798
2799                         if (drv->ops && drv->ops->digital_mute &&
2800                                                         dai->playback_active)
2801                                 drv->ops->digital_mute(dai, mute);
2802                 }
2803         }
2804
2805         return 0;
2806 }
2807
2808 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2809 {
2810         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2811         struct snd_soc_dpcm *dpcm;
2812         struct snd_soc_dapm_widget_list *list;
2813         int ret;
2814         int stream = fe_substream->stream;
2815
2816         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2817         fe->dpcm[stream].runtime = fe_substream->runtime;
2818
2819         ret = dpcm_path_get(fe, stream, &list);
2820         if (ret < 0) {
2821                 mutex_unlock(&fe->card->mutex);
2822                 return ret;
2823         } else if (ret == 0) {
2824                 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
2825                         fe->dai_link->name, stream ? "capture" : "playback");
2826         }
2827
2828         /* calculate valid and active FE <-> BE dpcms */
2829         dpcm_process_paths(fe, stream, &list, 1);
2830
2831         ret = dpcm_fe_dai_startup(fe_substream);
2832         if (ret < 0) {
2833                 /* clean up all links */
2834                 for_each_dpcm_be(fe, stream, dpcm)
2835                         dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2836
2837                 dpcm_be_disconnect(fe, stream);
2838                 fe->dpcm[stream].runtime = NULL;
2839         }
2840
2841         dpcm_clear_pending_state(fe, stream);
2842         dpcm_path_put(&list);
2843         mutex_unlock(&fe->card->mutex);
2844         return ret;
2845 }
2846
2847 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2848 {
2849         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2850         struct snd_soc_dpcm *dpcm;
2851         int stream = fe_substream->stream, ret;
2852
2853         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2854         ret = dpcm_fe_dai_shutdown(fe_substream);
2855
2856         /* mark FE's links ready to prune */
2857         for_each_dpcm_be(fe, stream, dpcm)
2858                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2859
2860         dpcm_be_disconnect(fe, stream);
2861
2862         fe->dpcm[stream].runtime = NULL;
2863         mutex_unlock(&fe->card->mutex);
2864         return ret;
2865 }
2866
2867 static void soc_pcm_private_free(struct snd_pcm *pcm)
2868 {
2869         struct snd_soc_pcm_runtime *rtd = pcm->private_data;
2870
2871         /* need to sync the delayed work before releasing resources */
2872         flush_delayed_work(&rtd->delayed_work);
2873         snd_soc_pcm_component_free(pcm);
2874 }
2875
2876 /* create a new pcm */
2877 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2878 {
2879         struct snd_soc_dai *codec_dai;
2880         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2881         struct snd_soc_rtdcom_list *rtdcom;
2882         struct snd_pcm *pcm;
2883         char new_name[64];
2884         int ret = 0, playback = 0, capture = 0;
2885         int i;
2886
2887         if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
2888                 playback = rtd->dai_link->dpcm_playback;
2889                 capture = rtd->dai_link->dpcm_capture;
2890         } else {
2891                 /* Adapt stream for codec2codec links */
2892                 struct snd_soc_pcm_stream *cpu_capture = rtd->dai_link->params ?
2893                         &cpu_dai->driver->playback : &cpu_dai->driver->capture;
2894                 struct snd_soc_pcm_stream *cpu_playback = rtd->dai_link->params ?
2895                         &cpu_dai->driver->capture : &cpu_dai->driver->playback;
2896
2897                 for_each_rtd_codec_dai(rtd, i, codec_dai) {
2898                         if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) &&
2899                             snd_soc_dai_stream_valid(cpu_dai,   SNDRV_PCM_STREAM_PLAYBACK))
2900                                 playback = 1;
2901                         if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) &&
2902                             snd_soc_dai_stream_valid(cpu_dai,   SNDRV_PCM_STREAM_CAPTURE))
2903                                 capture = 1;
2904                 }
2905
2906                 capture = capture && cpu_capture->channels_min;
2907                 playback = playback && cpu_playback->channels_min;
2908         }
2909
2910         if (rtd->dai_link->playback_only) {
2911                 playback = 1;
2912                 capture = 0;
2913         }
2914
2915         if (rtd->dai_link->capture_only) {
2916                 playback = 0;
2917                 capture = 1;
2918         }
2919
2920         /* create the PCM */
2921         if (rtd->dai_link->params) {
2922                 snprintf(new_name, sizeof(new_name), "codec2codec(%s)",
2923                          rtd->dai_link->stream_name);
2924
2925                 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2926                                            playback, capture, &pcm);
2927         } else if (rtd->dai_link->no_pcm) {
2928                 snprintf(new_name, sizeof(new_name), "(%s)",
2929                         rtd->dai_link->stream_name);
2930
2931                 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2932                                 playback, capture, &pcm);
2933         } else {
2934                 if (rtd->dai_link->dynamic)
2935                         snprintf(new_name, sizeof(new_name), "%s (*)",
2936                                 rtd->dai_link->stream_name);
2937                 else
2938                         snprintf(new_name, sizeof(new_name), "%s %s-%d",
2939                                 rtd->dai_link->stream_name,
2940                                 (rtd->num_codecs > 1) ?
2941                                 "multicodec" : rtd->codec_dai->name, num);
2942
2943                 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2944                         capture, &pcm);
2945         }
2946         if (ret < 0) {
2947                 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
2948                         rtd->dai_link->name);
2949                 return ret;
2950         }
2951         dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
2952
2953         /* DAPM dai link stream work */
2954         if (rtd->dai_link->params)
2955                 INIT_DELAYED_WORK(&rtd->delayed_work,
2956                                   codec2codec_close_delayed_work);
2957         else
2958                 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
2959
2960         pcm->nonatomic = rtd->dai_link->nonatomic;
2961         rtd->pcm = pcm;
2962         pcm->private_data = rtd;
2963
2964         if (rtd->dai_link->no_pcm || rtd->dai_link->params) {
2965                 if (playback)
2966                         pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2967                 if (capture)
2968                         pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2969                 goto out;
2970         }
2971
2972         /* ASoC PCM operations */
2973         if (rtd->dai_link->dynamic) {
2974                 rtd->ops.open           = dpcm_fe_dai_open;
2975                 rtd->ops.hw_params      = dpcm_fe_dai_hw_params;
2976                 rtd->ops.prepare        = dpcm_fe_dai_prepare;
2977                 rtd->ops.trigger        = dpcm_fe_dai_trigger;
2978                 rtd->ops.hw_free        = dpcm_fe_dai_hw_free;
2979                 rtd->ops.close          = dpcm_fe_dai_close;
2980                 rtd->ops.pointer        = soc_pcm_pointer;
2981                 rtd->ops.ioctl          = snd_soc_pcm_component_ioctl;
2982         } else {
2983                 rtd->ops.open           = soc_pcm_open;
2984                 rtd->ops.hw_params      = soc_pcm_hw_params;
2985                 rtd->ops.prepare        = soc_pcm_prepare;
2986                 rtd->ops.trigger        = soc_pcm_trigger;
2987                 rtd->ops.hw_free        = soc_pcm_hw_free;
2988                 rtd->ops.close          = soc_pcm_close;
2989                 rtd->ops.pointer        = soc_pcm_pointer;
2990                 rtd->ops.ioctl          = snd_soc_pcm_component_ioctl;
2991         }
2992
2993         for_each_rtdcom(rtd, rtdcom) {
2994                 const struct snd_soc_component_driver *drv = rtdcom->component->driver;
2995
2996                 if (drv->copy_user)
2997                         rtd->ops.copy_user      = snd_soc_pcm_component_copy_user;
2998                 if (drv->page)
2999                         rtd->ops.page           = snd_soc_pcm_component_page;
3000                 if (drv->mmap)
3001                         rtd->ops.mmap           = snd_soc_pcm_component_mmap;
3002         }
3003
3004         if (playback)
3005                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
3006
3007         if (capture)
3008                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
3009
3010         ret = snd_soc_pcm_component_new(pcm);
3011         if (ret < 0) {
3012                 dev_err(rtd->dev, "ASoC: pcm constructor failed: %d\n", ret);
3013                 return ret;
3014         }
3015
3016         pcm->private_free = soc_pcm_private_free;
3017         pcm->no_device_suspend = true;
3018 out:
3019         dev_info(rtd->card->dev, "%s <-> %s mapping ok\n",
3020                  (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name,
3021                  cpu_dai->name);
3022         return ret;
3023 }
3024
3025 /* is the current PCM operation for this FE ? */
3026 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
3027 {
3028         if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
3029                 return 1;
3030         return 0;
3031 }
3032 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
3033
3034 /* is the current PCM operation for this BE ? */
3035 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
3036                 struct snd_soc_pcm_runtime *be, int stream)
3037 {
3038         if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
3039            ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
3040                   be->dpcm[stream].runtime_update))
3041                 return 1;
3042         return 0;
3043 }
3044 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
3045
3046 /* get the substream for this BE */
3047 struct snd_pcm_substream *
3048         snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
3049 {
3050         return be->pcm->streams[stream].substream;
3051 }
3052 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
3053
3054 /* get the BE runtime state */
3055 enum snd_soc_dpcm_state
3056         snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream)
3057 {
3058         return be->dpcm[stream].state;
3059 }
3060 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state);
3061
3062 /* set the BE runtime state */
3063 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be,
3064                 int stream, enum snd_soc_dpcm_state state)
3065 {
3066         be->dpcm[stream].state = state;
3067 }
3068 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state);
3069
3070 /*
3071  * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
3072  * are not running, paused or suspended for the specified stream direction.
3073  */
3074 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
3075                 struct snd_soc_pcm_runtime *be, int stream)
3076 {
3077         struct snd_soc_dpcm *dpcm;
3078         int state;
3079         int ret = 1;
3080         unsigned long flags;
3081
3082         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3083         for_each_dpcm_fe(be, stream, dpcm) {
3084
3085                 if (dpcm->fe == fe)
3086                         continue;
3087
3088                 state = dpcm->fe->dpcm[stream].state;
3089                 if (state == SND_SOC_DPCM_STATE_START ||
3090                         state == SND_SOC_DPCM_STATE_PAUSED ||
3091                         state == SND_SOC_DPCM_STATE_SUSPEND) {
3092                         ret = 0;
3093                         break;
3094                 }
3095         }
3096         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3097
3098         /* it's safe to free/stop this BE DAI */
3099         return ret;
3100 }
3101 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
3102
3103 /*
3104  * We can only change hw params a BE DAI if any of it's FE are not prepared,
3105  * running, paused or suspended for the specified stream direction.
3106  */
3107 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
3108                 struct snd_soc_pcm_runtime *be, int stream)
3109 {
3110         struct snd_soc_dpcm *dpcm;
3111         int state;
3112         int ret = 1;
3113         unsigned long flags;
3114
3115         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3116         for_each_dpcm_fe(be, stream, dpcm) {
3117
3118                 if (dpcm->fe == fe)
3119                         continue;
3120
3121                 state = dpcm->fe->dpcm[stream].state;
3122                 if (state == SND_SOC_DPCM_STATE_START ||
3123                         state == SND_SOC_DPCM_STATE_PAUSED ||
3124                         state == SND_SOC_DPCM_STATE_SUSPEND ||
3125                         state == SND_SOC_DPCM_STATE_PREPARE) {
3126                         ret = 0;
3127                         break;
3128                 }
3129         }
3130         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3131
3132         /* it's safe to change hw_params */
3133         return ret;
3134 }
3135 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
3136
3137 #ifdef CONFIG_DEBUG_FS
3138 static const char *dpcm_state_string(enum snd_soc_dpcm_state state)
3139 {
3140         switch (state) {
3141         case SND_SOC_DPCM_STATE_NEW:
3142                 return "new";
3143         case SND_SOC_DPCM_STATE_OPEN:
3144                 return "open";
3145         case SND_SOC_DPCM_STATE_HW_PARAMS:
3146                 return "hw_params";
3147         case SND_SOC_DPCM_STATE_PREPARE:
3148                 return "prepare";
3149         case SND_SOC_DPCM_STATE_START:
3150                 return "start";
3151         case SND_SOC_DPCM_STATE_STOP:
3152                 return "stop";
3153         case SND_SOC_DPCM_STATE_SUSPEND:
3154                 return "suspend";
3155         case SND_SOC_DPCM_STATE_PAUSED:
3156                 return "paused";
3157         case SND_SOC_DPCM_STATE_HW_FREE:
3158                 return "hw_free";
3159         case SND_SOC_DPCM_STATE_CLOSE:
3160                 return "close";
3161         }
3162
3163         return "unknown";
3164 }
3165
3166 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
3167                                 int stream, char *buf, size_t size)
3168 {
3169         struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
3170         struct snd_soc_dpcm *dpcm;
3171         ssize_t offset = 0;
3172         unsigned long flags;
3173
3174         /* FE state */
3175         offset += snprintf(buf + offset, size - offset,
3176                         "[%s - %s]\n", fe->dai_link->name,
3177                         stream ? "Capture" : "Playback");
3178
3179         offset += snprintf(buf + offset, size - offset, "State: %s\n",
3180                         dpcm_state_string(fe->dpcm[stream].state));
3181
3182         if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3183             (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3184                 offset += snprintf(buf + offset, size - offset,
3185                                 "Hardware Params: "
3186                                 "Format = %s, Channels = %d, Rate = %d\n",
3187                                 snd_pcm_format_name(params_format(params)),
3188                                 params_channels(params),
3189                                 params_rate(params));
3190
3191         /* BEs state */
3192         offset += snprintf(buf + offset, size - offset, "Backends:\n");
3193
3194         if (list_empty(&fe->dpcm[stream].be_clients)) {
3195                 offset += snprintf(buf + offset, size - offset,
3196                                 " No active DSP links\n");
3197                 goto out;
3198         }
3199
3200         spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3201         for_each_dpcm_be(fe, stream, dpcm) {
3202                 struct snd_soc_pcm_runtime *be = dpcm->be;
3203                 params = &dpcm->hw_params;
3204
3205                 offset += snprintf(buf + offset, size - offset,
3206                                 "- %s\n", be->dai_link->name);
3207
3208                 offset += snprintf(buf + offset, size - offset,
3209                                 "   State: %s\n",
3210                                 dpcm_state_string(be->dpcm[stream].state));
3211
3212                 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3213                     (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3214                         offset += snprintf(buf + offset, size - offset,
3215                                 "   Hardware Params: "
3216                                 "Format = %s, Channels = %d, Rate = %d\n",
3217                                 snd_pcm_format_name(params_format(params)),
3218                                 params_channels(params),
3219                                 params_rate(params));
3220         }
3221         spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3222 out:
3223         return offset;
3224 }
3225
3226 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
3227                                 size_t count, loff_t *ppos)
3228 {
3229         struct snd_soc_pcm_runtime *fe = file->private_data;
3230         ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
3231         char *buf;
3232
3233         buf = kmalloc(out_count, GFP_KERNEL);
3234         if (!buf)
3235                 return -ENOMEM;
3236
3237         if (snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_PLAYBACK))
3238                 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
3239                                         buf + offset, out_count - offset);
3240
3241         if (snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_CAPTURE))
3242                 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE,
3243                                         buf + offset, out_count - offset);
3244
3245         ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
3246
3247         kfree(buf);
3248         return ret;
3249 }
3250
3251 static const struct file_operations dpcm_state_fops = {
3252         .open = simple_open,
3253         .read = dpcm_state_read_file,
3254         .llseek = default_llseek,
3255 };
3256
3257 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
3258 {
3259         if (!rtd->dai_link)
3260                 return;
3261
3262         if (!rtd->dai_link->dynamic)
3263                 return;
3264
3265         if (!rtd->card->debugfs_card_root)
3266                 return;
3267
3268         rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
3269                         rtd->card->debugfs_card_root);
3270
3271         debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root,
3272                             rtd, &dpcm_state_fops);
3273 }
3274 #endif