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_dai_stream_valid() - check if a DAI supports the given stream
  33  *
  34  * Returns true if the DAI supports the indicated stream type.
  35  */
  36 static bool snd_soc_dai_stream_valid(struct snd_soc_dai *dai, int stream)
  37 {
  38         struct snd_soc_pcm_stream *codec_stream;
  39
  40         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
  41                 codec_stream = &dai->driver->playback;
  42         else
  43                 codec_stream = &dai->driver->capture;
  44
  45         /* If the codec specifies any rate at all, it supports the stream. */
  46         return codec_stream->rates;
  47 }
  48
  49 /**
  50  * snd_soc_runtime_activate() - Increment active count for PCM runtime components
  51  * @rtd: ASoC PCM runtime that is activated
  52  * @stream: Direction of the PCM stream
  53  *
  54  * Increments the active count for all the DAIs and components attached to a PCM
  55  * runtime. Should typically be called when a stream is opened.
  56  *
  57  * Must be called with the rtd->pcm_mutex being held
  58  */
  59 void snd_soc_runtime_activate(struct snd_soc_pcm_runtime *rtd, int stream)
  60 {
  61         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  62         struct snd_soc_dai *codec_dai;
  63         int i;
  64
  65         lockdep_assert_held(&rtd->pcm_mutex);
  66
  67         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
  68                 cpu_dai->playback_active++;
  69                 for_each_rtd_codec_dai(rtd, i, codec_dai)
  70                         codec_dai->playback_active++;
  71         } else {
  72                 cpu_dai->capture_active++;
  73                 for_each_rtd_codec_dai(rtd, i, codec_dai)
  74                         codec_dai->capture_active++;
  75         }
  76
  77         cpu_dai->active++;
  78         cpu_dai->component->active++;
  79         for_each_rtd_codec_dai(rtd, i, codec_dai) {
  80                 codec_dai->active++;
  81                 codec_dai->component->active++;
  82         }
  83 }
  84
  85 /**
  86  * snd_soc_runtime_deactivate() - Decrement active count for PCM runtime components
  87  * @rtd: ASoC PCM runtime that is deactivated
  88  * @stream: Direction of the PCM stream
  89  *
  90  * Decrements the active count for all the DAIs and components attached to a PCM
  91  * runtime. Should typically be called when a stream is closed.
  92  *
  93  * Must be called with the rtd->pcm_mutex being held
  94  */
  95 void snd_soc_runtime_deactivate(struct snd_soc_pcm_runtime *rtd, int stream)
  96 {
  97         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  98         struct snd_soc_dai *codec_dai;
  99         int i;
 100
 101         lockdep_assert_held(&rtd->pcm_mutex);
 102
 103         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
 104                 cpu_dai->playback_active--;
 105                 for_each_rtd_codec_dai(rtd, i, codec_dai)
 106                         codec_dai->playback_active--;
 107         } else {
 108                 cpu_dai->capture_active--;
 109                 for_each_rtd_codec_dai(rtd, i, codec_dai)
 110                         codec_dai->capture_active--;
 111         }
 112
 113         cpu_dai->active--;
 114         cpu_dai->component->active--;
 115         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 116                 codec_dai->component->active--;
 117                 codec_dai->active--;
 118         }
 119 }
 120
 121 /**
 122  * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay
 123  * @rtd: The ASoC PCM runtime that should be checked.
 124  *
 125  * This function checks whether the power down delay should be ignored for a
 126  * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has
 127  * been configured to ignore the delay, or if none of the components benefits
 128  * from having the delay.
 129  */
 130 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd)
 131 {
 132         struct snd_soc_rtdcom_list *rtdcom;
 133         struct snd_soc_component *component;
 134         bool ignore = true;
 135
 136         if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time)
 137                 return true;
 138
 139         for_each_rtdcom(rtd, rtdcom) {
 140                 component = rtdcom->component;
 141
 142                 ignore &= !component->driver->use_pmdown_time;
 143         }
 144
 145         return ignore;
 146 }
 147
 148 /**
 149  * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
 150  * @substream: the pcm substream
 151  * @hw: the hardware parameters
 152  *
 153  * Sets the substream runtime hardware parameters.
 154  */
 155 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
 156         const struct snd_pcm_hardware *hw)
 157 {
 158         struct snd_pcm_runtime *runtime = substream->runtime;
 159         runtime->hw.info = hw->info;
 160         runtime->hw.formats = hw->formats;
 161         runtime->hw.period_bytes_min = hw->period_bytes_min;
 162         runtime->hw.period_bytes_max = hw->period_bytes_max;
 163         runtime->hw.periods_min = hw->periods_min;
 164         runtime->hw.periods_max = hw->periods_max;
 165         runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
 166         runtime->hw.fifo_size = hw->fifo_size;
 167         return 0;
 168 }
 169 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
 170
 171 /* DPCM stream event, send event to FE and all active BEs. */
 172 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
 173         int event)
 174 {
 175         struct snd_soc_dpcm *dpcm;
 176
 177         for_each_dpcm_be(fe, dir, dpcm) {
 178
 179                 struct snd_soc_pcm_runtime *be = dpcm->be;
 180
 181                 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n",
 182                                 be->dai_link->name, event, dir);
 183
 184                 if ((event == SND_SOC_DAPM_STREAM_STOP) &&
 185                     (be->dpcm[dir].users >= 1))
 186                         continue;
 187
 188                 snd_soc_dapm_stream_event(be, dir, event);
 189         }
 190
 191         snd_soc_dapm_stream_event(fe, dir, event);
 192
 193         return 0;
 194 }
 195
 196 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
 197                                         struct snd_soc_dai *soc_dai)
 198 {
 199         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 200         int ret;
 201
 202         if (soc_dai->rate && (soc_dai->driver->symmetric_rates ||
 203                                 rtd->dai_link->symmetric_rates)) {
 204                 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %dHz rate\n",
 205                                 soc_dai->rate);
 206
 207                 ret = snd_pcm_hw_constraint_single(substream->runtime,
 208                                                 SNDRV_PCM_HW_PARAM_RATE,
 209                                                 soc_dai->rate);
 210                 if (ret < 0) {
 211                         dev_err(soc_dai->dev,
 212                                 "ASoC: Unable to apply rate constraint: %d\n",
 213                                 ret);
 214                         return ret;
 215                 }
 216         }
 217
 218         if (soc_dai->channels && (soc_dai->driver->symmetric_channels ||
 219                                 rtd->dai_link->symmetric_channels)) {
 220                 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d channel(s)\n",
 221                                 soc_dai->channels);
 222
 223                 ret = snd_pcm_hw_constraint_single(substream->runtime,
 224                                                 SNDRV_PCM_HW_PARAM_CHANNELS,
 225                                                 soc_dai->channels);
 226                 if (ret < 0) {
 227                         dev_err(soc_dai->dev,
 228                                 "ASoC: Unable to apply channel symmetry constraint: %d\n",
 229                                 ret);
 230                         return ret;
 231                 }
 232         }
 233
 234         if (soc_dai->sample_bits && (soc_dai->driver->symmetric_samplebits ||
 235                                 rtd->dai_link->symmetric_samplebits)) {
 236                 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d sample bits\n",
 237                                 soc_dai->sample_bits);
 238
 239                 ret = snd_pcm_hw_constraint_single(substream->runtime,
 240                                                 SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
 241                                                 soc_dai->sample_bits);
 242                 if (ret < 0) {
 243                         dev_err(soc_dai->dev,
 244                                 "ASoC: Unable to apply sample bits symmetry constraint: %d\n",
 245                                 ret);
 246                         return ret;
 247                 }
 248         }
 249
 250         return 0;
 251 }
 252
 253 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream,
 254                                 struct snd_pcm_hw_params *params)
 255 {
 256         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 257         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 258         struct snd_soc_dai *codec_dai;
 259         unsigned int rate, channels, sample_bits, symmetry, i;
 260
 261         rate = params_rate(params);
 262         channels = params_channels(params);
 263         sample_bits = snd_pcm_format_physical_width(params_format(params));
 264
 265         /* reject unmatched parameters when applying symmetry */
 266         symmetry = cpu_dai->driver->symmetric_rates ||
 267                 rtd->dai_link->symmetric_rates;
 268
 269         for_each_rtd_codec_dai(rtd, i, codec_dai)
 270                 symmetry |= codec_dai->driver->symmetric_rates;
 271
 272         if (symmetry && cpu_dai->rate && cpu_dai->rate != rate) {
 273                 dev_err(rtd->dev, "ASoC: unmatched rate symmetry: %d - %d\n",
 274                                 cpu_dai->rate, rate);
 275                 return -EINVAL;
 276         }
 277
 278         symmetry = cpu_dai->driver->symmetric_channels ||
 279                 rtd->dai_link->symmetric_channels;
 280
 281         for_each_rtd_codec_dai(rtd, i, codec_dai)
 282                 symmetry |= codec_dai->driver->symmetric_channels;
 283
 284         if (symmetry && cpu_dai->channels && cpu_dai->channels != channels) {
 285                 dev_err(rtd->dev, "ASoC: unmatched channel symmetry: %d - %d\n",
 286                                 cpu_dai->channels, channels);
 287                 return -EINVAL;
 288         }
 289
 290         symmetry = cpu_dai->driver->symmetric_samplebits ||
 291                 rtd->dai_link->symmetric_samplebits;
 292
 293         for_each_rtd_codec_dai(rtd, i, codec_dai)
 294                 symmetry |= codec_dai->driver->symmetric_samplebits;
 295
 296         if (symmetry && cpu_dai->sample_bits && cpu_dai->sample_bits != sample_bits) {
 297                 dev_err(rtd->dev, "ASoC: unmatched sample bits symmetry: %d - %d\n",
 298                                 cpu_dai->sample_bits, sample_bits);
 299                 return -EINVAL;
 300         }
 301
 302         return 0;
 303 }
 304
 305 static bool soc_pcm_has_symmetry(struct snd_pcm_substream *substream)
 306 {
 307         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 308         struct snd_soc_dai_driver *cpu_driver = rtd->cpu_dai->driver;
 309         struct snd_soc_dai_link *link = rtd->dai_link;
 310         struct snd_soc_dai *codec_dai;
 311         unsigned int symmetry, i;
 312
 313         symmetry = cpu_driver->symmetric_rates || link->symmetric_rates ||
 314                 cpu_driver->symmetric_channels || link->symmetric_channels ||
 315                 cpu_driver->symmetric_samplebits || link->symmetric_samplebits;
 316
 317         for_each_rtd_codec_dai(rtd, i, codec_dai)
 318                 symmetry = symmetry ||
 319                         codec_dai->driver->symmetric_rates ||
 320                         codec_dai->driver->symmetric_channels ||
 321                         codec_dai->driver->symmetric_samplebits;
 322
 323         return symmetry;
 324 }
 325
 326 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits)
 327 {
 328         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 329         int ret;
 330
 331         if (!bits)
 332                 return;
 333
 334         ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits);
 335         if (ret != 0)
 336                 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n",
 337                                  bits, ret);
 338 }
 339
 340 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream)
 341 {
 342         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 343         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 344         struct snd_soc_dai *codec_dai;
 345         int i;
 346         unsigned int bits = 0, cpu_bits;
 347
 348         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 349                 for_each_rtd_codec_dai(rtd, i, codec_dai) {
 350                         if (codec_dai->driver->playback.sig_bits == 0) {
 351                                 bits = 0;
 352                                 break;
 353                         }
 354                         bits = max(codec_dai->driver->playback.sig_bits, bits);
 355                 }
 356                 cpu_bits = cpu_dai->driver->playback.sig_bits;
 357         } else {
 358                 for_each_rtd_codec_dai(rtd, i, codec_dai) {
 359                         if (codec_dai->driver->capture.sig_bits == 0) {
 360                                 bits = 0;
 361                                 break;
 362                         }
 363                         bits = max(codec_dai->driver->capture.sig_bits, bits);
 364                 }
 365                 cpu_bits = cpu_dai->driver->capture.sig_bits;
 366         }
 367
 368         soc_pcm_set_msb(substream, bits);
 369         soc_pcm_set_msb(substream, cpu_bits);
 370 }
 371
 372 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream)
 373 {
 374         struct snd_pcm_runtime *runtime = substream->runtime;
 375         struct snd_pcm_hardware *hw = &runtime->hw;
 376         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 377         struct snd_soc_dai *codec_dai;
 378         struct snd_soc_dai_driver *cpu_dai_drv = rtd->cpu_dai->driver;
 379         struct snd_soc_dai_driver *codec_dai_drv;
 380         struct snd_soc_pcm_stream *codec_stream;
 381         struct snd_soc_pcm_stream *cpu_stream;
 382         unsigned int chan_min = 0, chan_max = UINT_MAX;
 383         unsigned int rate_min = 0, rate_max = UINT_MAX;
 384         unsigned int rates = UINT_MAX;
 385         u64 formats = ULLONG_MAX;
 386         int i;
 387
 388         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 389                 cpu_stream = &cpu_dai_drv->playback;
 390         else
 391                 cpu_stream = &cpu_dai_drv->capture;
 392
 393         /* first calculate min/max only for CODECs in the DAI link */
 394         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 395
 396                 /*
 397                  * Skip CODECs which don't support the current stream type.
 398                  * Otherwise, since the rate, channel, and format values will
 399                  * zero in that case, we would have no usable settings left,
 400                  * causing the resulting setup to fail.
 401                  * At least one CODEC should match, otherwise we should have
 402                  * bailed out on a higher level, since there would be no
 403                  * CODEC to support the transfer direction in that case.
 404                  */
 405                 if (!snd_soc_dai_stream_valid(codec_dai,
 406                                               substream->stream))
 407                         continue;
 408
 409                 codec_dai_drv = codec_dai->driver;
 410                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 411                         codec_stream = &codec_dai_drv->playback;
 412                 else
 413                         codec_stream = &codec_dai_drv->capture;
 414                 chan_min = max(chan_min, codec_stream->channels_min);
 415                 chan_max = min(chan_max, codec_stream->channels_max);
 416                 rate_min = max(rate_min, codec_stream->rate_min);
 417                 rate_max = min_not_zero(rate_max, codec_stream->rate_max);
 418                 formats &= codec_stream->formats;
 419                 rates = snd_pcm_rate_mask_intersect(codec_stream->rates, rates);
 420         }
 421
 422         /*
 423          * chan min/max cannot be enforced if there are multiple CODEC DAIs
 424          * connected to a single CPU DAI, use CPU DAI's directly and let
 425          * channel allocation be fixed up later
 426          */
 427         if (rtd->num_codecs > 1) {
 428                 chan_min = cpu_stream->channels_min;
 429                 chan_max = cpu_stream->channels_max;
 430         }
 431
 432         hw->channels_min = max(chan_min, cpu_stream->channels_min);
 433         hw->channels_max = min(chan_max, cpu_stream->channels_max);
 434         if (hw->formats)
 435                 hw->formats &= formats & cpu_stream->formats;
 436         else
 437                 hw->formats = formats & cpu_stream->formats;
 438         hw->rates = snd_pcm_rate_mask_intersect(rates, cpu_stream->rates);
 439
 440         snd_pcm_limit_hw_rates(runtime);
 441
 442         hw->rate_min = max(hw->rate_min, cpu_stream->rate_min);
 443         hw->rate_min = max(hw->rate_min, rate_min);
 444         hw->rate_max = min_not_zero(hw->rate_max, cpu_stream->rate_max);
 445         hw->rate_max = min_not_zero(hw->rate_max, rate_max);
 446 }
 447
 448 static int soc_pcm_components_close(struct snd_pcm_substream *substream,
 449                                     struct snd_soc_component *last)
 450 {
 451         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 452         struct snd_soc_rtdcom_list *rtdcom;
 453         struct snd_soc_component *component;
 454
 455         for_each_rtdcom(rtd, rtdcom) {
 456                 component = rtdcom->component;
 457
 458                 if (component == last)
 459                         break;
 460
 461                 if (!component->driver->ops ||
 462                     !component->driver->ops->close)
 463                         continue;
 464
 465                 component->driver->ops->close(substream);
 466         }
 467
 468         return 0;
 469 }
 470
 471 /*
 472  * Called by ALSA when a PCM substream is opened, the runtime->hw record is
 473  * then initialized and any private data can be allocated. This also calls
 474  * startup for the cpu DAI, component, machine and codec DAI.
 475  */
 476 static int soc_pcm_open(struct snd_pcm_substream *substream)
 477 {
 478         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 479         struct snd_pcm_runtime *runtime = substream->runtime;
 480         struct snd_soc_component *component;
 481         struct snd_soc_rtdcom_list *rtdcom;
 482         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 483         struct snd_soc_dai *codec_dai;
 484         const char *codec_dai_name = "multicodec";
 485         int i, ret = 0;
 486
 487         pinctrl_pm_select_default_state(cpu_dai->dev);
 488         for_each_rtd_codec_dai(rtd, i, codec_dai)
 489                 pinctrl_pm_select_default_state(codec_dai->dev);
 490
 491         for_each_rtdcom(rtd, rtdcom) {
 492                 component = rtdcom->component;
 493
 494                 pm_runtime_get_sync(component->dev);
 495         }
 496
 497         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 498
 499         /* startup the audio subsystem */
 500         if (cpu_dai->driver->ops->startup) {
 501                 ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
 502                 if (ret < 0) {
 503                         dev_err(cpu_dai->dev, "ASoC: can't open interface"
 504                                 " %s: %d\n", cpu_dai->name, ret);
 505                         goto out;
 506                 }
 507         }
 508
 509         for_each_rtdcom(rtd, rtdcom) {
 510                 component = rtdcom->component;
 511
 512                 if (!component->driver->ops ||
 513                     !component->driver->ops->open)
 514                         continue;
 515
 516                 ret = component->driver->ops->open(substream);
 517                 if (ret < 0) {
 518                         dev_err(component->dev,
 519                                 "ASoC: can't open component %s: %d\n",
 520                                 component->name, ret);
 521                         goto component_err;
 522                 }
 523         }
 524         component = NULL;
 525
 526         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 527                 if (codec_dai->driver->ops->startup) {
 528                         ret = codec_dai->driver->ops->startup(substream,
 529                                                               codec_dai);
 530                         if (ret < 0) {
 531                                 dev_err(codec_dai->dev,
 532                                         "ASoC: can't open codec %s: %d\n",
 533                                         codec_dai->name, ret);
 534                                 goto codec_dai_err;
 535                         }
 536                 }
 537
 538                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 539                         codec_dai->tx_mask = 0;
 540                 else
 541                         codec_dai->rx_mask = 0;
 542         }
 543
 544         if (rtd->dai_link->ops->startup) {
 545                 ret = rtd->dai_link->ops->startup(substream);
 546                 if (ret < 0) {
 547                         pr_err("ASoC: %s startup failed: %d\n",
 548                                rtd->dai_link->name, ret);
 549                         goto machine_err;
 550                 }
 551         }
 552
 553         /* Dynamic PCM DAI links compat checks use dynamic capabilities */
 554         if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
 555                 goto dynamic;
 556
 557         /* Check that the codec and cpu DAIs are compatible */
 558         soc_pcm_init_runtime_hw(substream);
 559
 560         if (rtd->num_codecs == 1)
 561                 codec_dai_name = rtd->codec_dai->name;
 562
 563         if (soc_pcm_has_symmetry(substream))
 564                 runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
 565
 566         ret = -EINVAL;
 567         if (!runtime->hw.rates) {
 568                 printk(KERN_ERR "ASoC: %s <-> %s No matching rates\n",
 569                         codec_dai_name, cpu_dai->name);
 570                 goto config_err;
 571         }
 572         if (!runtime->hw.formats) {
 573                 printk(KERN_ERR "ASoC: %s <-> %s No matching formats\n",
 574                         codec_dai_name, cpu_dai->name);
 575                 goto config_err;
 576         }
 577         if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
 578             runtime->hw.channels_min > runtime->hw.channels_max) {
 579                 printk(KERN_ERR "ASoC: %s <-> %s No matching channels\n",
 580                                 codec_dai_name, cpu_dai->name);
 581                 goto config_err;
 582         }
 583
 584         soc_pcm_apply_msb(substream);
 585
 586         /* Symmetry only applies if we've already got an active stream. */
 587         if (cpu_dai->active) {
 588                 ret = soc_pcm_apply_symmetry(substream, cpu_dai);
 589                 if (ret != 0)
 590                         goto config_err;
 591         }
 592
 593         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 594                 if (codec_dai->active) {
 595                         ret = soc_pcm_apply_symmetry(substream, codec_dai);
 596                         if (ret != 0)
 597                                 goto config_err;
 598                 }
 599         }
 600
 601         pr_debug("ASoC: %s <-> %s info:\n",
 602                         codec_dai_name, cpu_dai->name);
 603         pr_debug("ASoC: rate mask 0x%x\n", runtime->hw.rates);
 604         pr_debug("ASoC: min ch %d max ch %d\n", runtime->hw.channels_min,
 605                  runtime->hw.channels_max);
 606         pr_debug("ASoC: min rate %d max rate %d\n", runtime->hw.rate_min,
 607                  runtime->hw.rate_max);
 608
 609 dynamic:
 610
 611         snd_soc_runtime_activate(rtd, substream->stream);
 612
 613         mutex_unlock(&rtd->pcm_mutex);
 614         return 0;
 615
 616 config_err:
 617         if (rtd->dai_link->ops->shutdown)
 618                 rtd->dai_link->ops->shutdown(substream);
 619
 620 machine_err:
 621         i = rtd->num_codecs;
 622
 623 codec_dai_err:
 624         for_each_rtd_codec_dai_rollback(rtd, i, codec_dai) {
 625                 if (codec_dai->driver->ops->shutdown)
 626                         codec_dai->driver->ops->shutdown(substream, codec_dai);
 627         }
 628
 629 component_err:
 630         soc_pcm_components_close(substream, component);
 631
 632         if (cpu_dai->driver->ops->shutdown)
 633                 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
 634 out:
 635         mutex_unlock(&rtd->pcm_mutex);
 636
 637         for_each_rtdcom(rtd, rtdcom) {
 638                 component = rtdcom->component;
 639
 640                 pm_runtime_mark_last_busy(component->dev);
 641                 pm_runtime_put_autosuspend(component->dev);
 642         }
 643
 644         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 645                 if (!codec_dai->active)
 646                         pinctrl_pm_select_sleep_state(codec_dai->dev);
 647         }
 648         if (!cpu_dai->active)
 649                 pinctrl_pm_select_sleep_state(cpu_dai->dev);
 650
 651         return ret;
 652 }
 653
 654 /*
 655  * Power down the audio subsystem pmdown_time msecs after close is called.
 656  * This is to ensure there are no pops or clicks in between any music tracks
 657  * due to DAPM power cycling.
 658  */
 659 static void close_delayed_work(struct work_struct *work)
 660 {
 661         struct snd_soc_pcm_runtime *rtd =
 662                         container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
 663         struct snd_soc_dai *codec_dai = rtd->codec_dais[0];
 664
 665         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 666
 667         dev_dbg(rtd->dev, "ASoC: pop wq checking: %s status: %s waiting: %s\n",
 668                  codec_dai->driver->playback.stream_name,
 669                  codec_dai->playback_active ? "active" : "inactive",
 670                  rtd->pop_wait ? "yes" : "no");
 671
 672         /* are we waiting on this codec DAI stream */
 673         if (rtd->pop_wait == 1) {
 674                 rtd->pop_wait = 0;
 675                 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
 676                                           SND_SOC_DAPM_STREAM_STOP);
 677         }
 678
 679         mutex_unlock(&rtd->pcm_mutex);
 680 }
 681
 682 /*
 683  * Called by ALSA when a PCM substream is closed. Private data can be
 684  * freed here. The cpu DAI, codec DAI, machine and components are also
 685  * shutdown.
 686  */
 687 static int soc_pcm_close(struct snd_pcm_substream *substream)
 688 {
 689         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 690         struct snd_soc_component *component;
 691         struct snd_soc_rtdcom_list *rtdcom;
 692         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 693         struct snd_soc_dai *codec_dai;
 694         int i;
 695
 696         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 697
 698         snd_soc_runtime_deactivate(rtd, substream->stream);
 699
 700         /* clear the corresponding DAIs rate when inactive */
 701         if (!cpu_dai->active)
 702                 cpu_dai->rate = 0;
 703
 704         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 705                 if (!codec_dai->active)
 706                         codec_dai->rate = 0;
 707         }
 708
 709         snd_soc_dai_digital_mute(cpu_dai, 1, substream->stream);
 710
 711         if (cpu_dai->driver->ops->shutdown)
 712                 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
 713
 714         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 715                 if (codec_dai->driver->ops->shutdown)
 716                         codec_dai->driver->ops->shutdown(substream, codec_dai);
 717         }
 718
 719         if (rtd->dai_link->ops->shutdown)
 720                 rtd->dai_link->ops->shutdown(substream);
 721
 722         soc_pcm_components_close(substream, NULL);
 723
 724         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 725                 if (snd_soc_runtime_ignore_pmdown_time(rtd)) {
 726                         /* powered down playback stream now */
 727                         snd_soc_dapm_stream_event(rtd,
 728                                                   SNDRV_PCM_STREAM_PLAYBACK,
 729                                                   SND_SOC_DAPM_STREAM_STOP);
 730                 } else {
 731                         /* start delayed pop wq here for playback streams */
 732                         rtd->pop_wait = 1;
 733                         queue_delayed_work(system_power_efficient_wq,
 734                                            &rtd->delayed_work,
 735                                            msecs_to_jiffies(rtd->pmdown_time));
 736                 }
 737         } else {
 738                 /* capture streams can be powered down now */
 739                 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
 740                                           SND_SOC_DAPM_STREAM_STOP);
 741         }
 742
 743         mutex_unlock(&rtd->pcm_mutex);
 744
 745         for_each_rtdcom(rtd, rtdcom) {
 746                 component = rtdcom->component;
 747
 748                 pm_runtime_mark_last_busy(component->dev);
 749                 pm_runtime_put_autosuspend(component->dev);
 750         }
 751
 752         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 753                 if (!codec_dai->active)
 754                         pinctrl_pm_select_sleep_state(codec_dai->dev);
 755         }
 756         if (!cpu_dai->active)
 757                 pinctrl_pm_select_sleep_state(cpu_dai->dev);
 758
 759         return 0;
 760 }
 761
 762 /*
 763  * Called by ALSA when the PCM substream is prepared, can set format, sample
 764  * rate, etc.  This function is non atomic and can be called multiple times,
 765  * it can refer to the runtime info.
 766  */
 767 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
 768 {
 769         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 770         struct snd_soc_component *component;
 771         struct snd_soc_rtdcom_list *rtdcom;
 772         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 773         struct snd_soc_dai *codec_dai;
 774         int i, ret = 0;
 775
 776         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 777
 778         if (rtd->dai_link->ops->prepare) {
 779                 ret = rtd->dai_link->ops->prepare(substream);
 780                 if (ret < 0) {
 781                         dev_err(rtd->card->dev, "ASoC: machine prepare error:"
 782                                 " %d\n", ret);
 783                         goto out;
 784                 }
 785         }
 786
 787         for_each_rtdcom(rtd, rtdcom) {
 788                 component = rtdcom->component;
 789
 790                 if (!component->driver->ops ||
 791                     !component->driver->ops->prepare)
 792                         continue;
 793
 794                 ret = component->driver->ops->prepare(substream);
 795                 if (ret < 0) {
 796                         dev_err(component->dev,
 797                                 "ASoC: platform prepare error: %d\n", ret);
 798                         goto out;
 799                 }
 800         }
 801
 802         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 803                 if (codec_dai->driver->ops->prepare) {
 804                         ret = codec_dai->driver->ops->prepare(substream,
 805                                                               codec_dai);
 806                         if (ret < 0) {
 807                                 dev_err(codec_dai->dev,
 808                                         "ASoC: codec DAI prepare error: %d\n",
 809                                         ret);
 810                                 goto out;
 811                         }
 812                 }
 813         }
 814
 815         if (cpu_dai->driver->ops->prepare) {
 816                 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
 817                 if (ret < 0) {
 818                         dev_err(cpu_dai->dev,
 819                                 "ASoC: cpu DAI prepare error: %d\n", ret);
 820                         goto out;
 821                 }
 822         }
 823
 824         /* cancel any delayed stream shutdown that is pending */
 825         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 826             rtd->pop_wait) {
 827                 rtd->pop_wait = 0;
 828                 cancel_delayed_work(&rtd->delayed_work);
 829         }
 830
 831         snd_soc_dapm_stream_event(rtd, substream->stream,
 832                         SND_SOC_DAPM_STREAM_START);
 833
 834         for_each_rtd_codec_dai(rtd, i, codec_dai)
 835                 snd_soc_dai_digital_mute(codec_dai, 0,
 836                                          substream->stream);
 837         snd_soc_dai_digital_mute(cpu_dai, 0, substream->stream);
 838
 839 out:
 840         mutex_unlock(&rtd->pcm_mutex);
 841         return ret;
 842 }
 843
 844 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params,
 845                                        unsigned int mask)
 846 {
 847         struct snd_interval *interval;
 848         int channels = hweight_long(mask);
 849
 850         interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
 851         interval->min = channels;
 852         interval->max = channels;
 853 }
 854
 855 int soc_dai_hw_params(struct snd_pcm_substream *substream,
 856                       struct snd_pcm_hw_params *params,
 857                       struct snd_soc_dai *dai)
 858 {
 859         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 860         int ret;
 861
 862         /* perform any topology hw_params fixups before DAI  */
 863         if (rtd->dai_link->be_hw_params_fixup) {
 864                 ret = rtd->dai_link->be_hw_params_fixup(rtd, params);
 865                 if (ret < 0) {
 866                         dev_err(rtd->dev,
 867                                 "ASoC: hw_params topology fixup failed %d\n",
 868                                 ret);
 869                         return ret;
 870                 }
 871         }
 872
 873         if (dai->driver->ops->hw_params) {
 874                 ret = dai->driver->ops->hw_params(substream, params, dai);
 875                 if (ret < 0) {
 876                         dev_err(dai->dev, "ASoC: can't set %s hw params: %d\n",
 877                                 dai->name, ret);
 878                         return ret;
 879                 }
 880         }
 881
 882         return 0;
 883 }
 884
 885 static int soc_pcm_components_hw_free(struct snd_pcm_substream *substream,
 886                                       struct snd_soc_component *last)
 887 {
 888         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 889         struct snd_soc_rtdcom_list *rtdcom;
 890         struct snd_soc_component *component;
 891
 892         for_each_rtdcom(rtd, rtdcom) {
 893                 component = rtdcom->component;
 894
 895                 if (component == last)
 896                         break;
 897
 898                 if (!component->driver->ops ||
 899                     !component->driver->ops->hw_free)
 900                         continue;
 901
 902                 component->driver->ops->hw_free(substream);
 903         }
 904
 905         return 0;
 906 }
 907
 908 /*
 909  * Called by ALSA when the hardware params are set by application. This
 910  * function can also be called multiple times and can allocate buffers
 911  * (using snd_pcm_lib_* ). It's non-atomic.
 912  */
 913 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
 914                                 struct snd_pcm_hw_params *params)
 915 {
 916         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 917         struct snd_soc_component *component;
 918         struct snd_soc_rtdcom_list *rtdcom;
 919         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 920         struct snd_soc_dai *codec_dai;
 921         int i, ret = 0;
 922
 923         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 924         if (rtd->dai_link->ops->hw_params) {
 925                 ret = rtd->dai_link->ops->hw_params(substream, params);
 926                 if (ret < 0) {
 927                         dev_err(rtd->card->dev, "ASoC: machine hw_params"
 928                                 " failed: %d\n", ret);
 929                         goto out;
 930                 }
 931         }
 932
 933         for_each_rtd_codec_dai(rtd, i, codec_dai) {
 934                 struct snd_pcm_hw_params codec_params;
 935
 936                 /*
 937                  * Skip CODECs which don't support the current stream type,
 938                  * the idea being that if a CODEC is not used for the currently
 939                  * set up transfer direction, it should not need to be
 940                  * configured, especially since the configuration used might
 941                  * not even be supported by that CODEC. There may be cases
 942                  * however where a CODEC needs to be set up although it is
 943                  * actually not being used for the transfer, e.g. if a
 944                  * capture-only CODEC is acting as an LRCLK and/or BCLK master
 945                  * for the DAI link including a playback-only CODEC.
 946                  * If this becomes necessary, we will have to augment the
 947                  * machine driver setup with information on how to act, so
 948                  * we can do the right thing here.
 949                  */
 950                 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
 951                         continue;
 952
 953                 /* copy params for each codec */
 954                 codec_params = *params;
 955
 956                 /* fixup params based on TDM slot masks */
 957                 if (codec_dai->tx_mask)
 958                         soc_pcm_codec_params_fixup(&codec_params,
 959                                                    codec_dai->tx_mask);
 960                 if (codec_dai->rx_mask)
 961                         soc_pcm_codec_params_fixup(&codec_params,
 962                                                    codec_dai->rx_mask);
 963
 964                 ret = soc_dai_hw_params(substream, &codec_params, codec_dai);
 965                 if(ret < 0)
 966                         goto codec_err;
 967
 968                 codec_dai->rate = params_rate(&codec_params);
 969                 codec_dai->channels = params_channels(&codec_params);
 970                 codec_dai->sample_bits = snd_pcm_format_physical_width(
 971                                                 params_format(&codec_params));
 972         }
 973
 974         ret = soc_dai_hw_params(substream, params, cpu_dai);
 975         if (ret < 0)
 976                 goto interface_err;
 977
 978         for_each_rtdcom(rtd, rtdcom) {
 979                 component = rtdcom->component;
 980
 981                 if (!component->driver->ops ||
 982                     !component->driver->ops->hw_params)
 983                         continue;
 984
 985                 ret = component->driver->ops->hw_params(substream, params);
 986                 if (ret < 0) {
 987                         dev_err(component->dev,
 988                                 "ASoC: %s hw params failed: %d\n",
 989                                 component->name, ret);
 990                         goto component_err;
 991                 }
 992         }
 993         component = NULL;
 994
 995         /* store the parameters for each DAIs */
 996         cpu_dai->rate = params_rate(params);
 997         cpu_dai->channels = params_channels(params);
 998         cpu_dai->sample_bits =
 999                 snd_pcm_format_physical_width(params_format(params));
1000
1001         ret = soc_pcm_params_symmetry(substream, params);
1002         if (ret)
1003                 goto component_err;
1004 out:
1005         mutex_unlock(&rtd->pcm_mutex);
1006         return ret;
1007
1008 component_err:
1009         soc_pcm_components_hw_free(substream, component);
1010
1011         if (cpu_dai->driver->ops->hw_free)
1012                 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
1013
1014 interface_err:
1015         i = rtd->num_codecs;
1016
1017 codec_err:
1018         for_each_rtd_codec_dai_rollback(rtd, i, codec_dai) {
1019                 if (codec_dai->driver->ops->hw_free)
1020                         codec_dai->driver->ops->hw_free(substream, codec_dai);
1021                 codec_dai->rate = 0;
1022         }
1023
1024         if (rtd->dai_link->ops->hw_free)
1025                 rtd->dai_link->ops->hw_free(substream);
1026
1027         mutex_unlock(&rtd->pcm_mutex);
1028         return ret;
1029 }
1030
1031 /*
1032  * Frees resources allocated by hw_params, can be called multiple times
1033  */
1034 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
1035 {
1036         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1037         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1038         struct snd_soc_dai *codec_dai;
1039         bool playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
1040         int i;
1041
1042         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
1043
1044         /* clear the corresponding DAIs parameters when going to be inactive */
1045         if (cpu_dai->active == 1) {
1046                 cpu_dai->rate = 0;
1047                 cpu_dai->channels = 0;
1048                 cpu_dai->sample_bits = 0;
1049         }
1050
1051         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1052                 if (codec_dai->active == 1) {
1053                         codec_dai->rate = 0;
1054                         codec_dai->channels = 0;
1055                         codec_dai->sample_bits = 0;
1056                 }
1057         }
1058
1059         /* apply codec digital mute */
1060         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1061                 if ((playback && codec_dai->playback_active == 1) ||
1062                     (!playback && codec_dai->capture_active == 1))
1063                         snd_soc_dai_digital_mute(codec_dai, 1,
1064                                                  substream->stream);
1065         }
1066
1067         /* free any machine hw params */
1068         if (rtd->dai_link->ops->hw_free)
1069                 rtd->dai_link->ops->hw_free(substream);
1070
1071         /* free any component resources */
1072         soc_pcm_components_hw_free(substream, NULL);
1073
1074         /* now free hw params for the DAIs  */
1075         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1076                 if (codec_dai->driver->ops->hw_free)
1077                         codec_dai->driver->ops->hw_free(substream, codec_dai);
1078         }
1079
1080         if (cpu_dai->driver->ops->hw_free)
1081                 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
1082
1083         mutex_unlock(&rtd->pcm_mutex);
1084         return 0;
1085 }
1086
1087 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
1088 {
1089         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1090         struct snd_soc_component *component;
1091         struct snd_soc_rtdcom_list *rtdcom;
1092         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1093         struct snd_soc_dai *codec_dai;
1094         int i, ret;
1095
1096         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1097                 if (codec_dai->driver->ops->trigger) {
1098                         ret = codec_dai->driver->ops->trigger(substream,
1099                                                               cmd, codec_dai);
1100                         if (ret < 0)
1101                                 return ret;
1102                 }
1103         }
1104
1105         for_each_rtdcom(rtd, rtdcom) {
1106                 component = rtdcom->component;
1107
1108                 if (!component->driver->ops ||
1109                     !component->driver->ops->trigger)
1110                         continue;
1111
1112                 ret = component->driver->ops->trigger(substream, cmd);
1113                 if (ret < 0)
1114                         return ret;
1115         }
1116
1117         if (cpu_dai->driver->ops->trigger) {
1118                 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
1119                 if (ret < 0)
1120                         return ret;
1121         }
1122
1123         if (rtd->dai_link->ops->trigger) {
1124                 ret = rtd->dai_link->ops->trigger(substream, cmd);
1125                 if (ret < 0)
1126                         return ret;
1127         }
1128
1129         return 0;
1130 }
1131
1132 static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
1133                                    int cmd)
1134 {
1135         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1136         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1137         struct snd_soc_dai *codec_dai;
1138         int i, ret;
1139
1140         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1141                 if (codec_dai->driver->ops->bespoke_trigger) {
1142                         ret = codec_dai->driver->ops->bespoke_trigger(substream,
1143                                                                 cmd, codec_dai);
1144                         if (ret < 0)
1145                                 return ret;
1146                 }
1147         }
1148
1149         if (cpu_dai->driver->ops->bespoke_trigger) {
1150                 ret = cpu_dai->driver->ops->bespoke_trigger(substream, cmd, cpu_dai);
1151                 if (ret < 0)
1152                         return ret;
1153         }
1154         return 0;
1155 }
1156 /*
1157  * soc level wrapper for pointer callback
1158  * If cpu_dai, codec_dai, component driver has the delay callback, then
1159  * the runtime->delay will be updated accordingly.
1160  */
1161 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1162 {
1163         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1164         struct snd_soc_component *component;
1165         struct snd_soc_rtdcom_list *rtdcom;
1166         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1167         struct snd_soc_dai *codec_dai;
1168         struct snd_pcm_runtime *runtime = substream->runtime;
1169         snd_pcm_uframes_t offset = 0;
1170         snd_pcm_sframes_t delay = 0;
1171         snd_pcm_sframes_t codec_delay = 0;
1172         int i;
1173
1174         /* clearing the previous total delay */
1175         runtime->delay = 0;
1176
1177         for_each_rtdcom(rtd, rtdcom) {
1178                 component = rtdcom->component;
1179
1180                 if (!component->driver->ops ||
1181                     !component->driver->ops->pointer)
1182                         continue;
1183
1184                 /* FIXME: use 1st pointer */
1185                 offset = component->driver->ops->pointer(substream);
1186                 break;
1187         }
1188         /* base delay if assigned in pointer callback */
1189         delay = runtime->delay;
1190
1191         if (cpu_dai->driver->ops->delay)
1192                 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
1193
1194         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1195                 if (codec_dai->driver->ops->delay)
1196                         codec_delay = max(codec_delay,
1197                                         codec_dai->driver->ops->delay(substream,
1198                                                                     codec_dai));
1199         }
1200         delay += codec_delay;
1201
1202         runtime->delay = delay;
1203
1204         return offset;
1205 }
1206
1207 /* connect a FE and BE */
1208 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1209                 struct snd_soc_pcm_runtime *be, int stream)
1210 {
1211         struct snd_soc_dpcm *dpcm;
1212
1213         /* only add new dpcms */
1214         for_each_dpcm_be(fe, stream, dpcm) {
1215                 if (dpcm->be == be && dpcm->fe == fe)
1216                         return 0;
1217         }
1218
1219         dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1220         if (!dpcm)
1221                 return -ENOMEM;
1222
1223         dpcm->be = be;
1224         dpcm->fe = fe;
1225         be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
1226         dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1227         list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1228         list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1229
1230         dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1231                         stream ? "capture" : "playback",  fe->dai_link->name,
1232                         stream ? "<-" : "->", be->dai_link->name);
1233
1234 #ifdef CONFIG_DEBUG_FS
1235         if (fe->debugfs_dpcm_root)
1236                 dpcm->debugfs_state = debugfs_create_u32(be->dai_link->name, 0644,
1237                                 fe->debugfs_dpcm_root, &dpcm->state);
1238 #endif
1239         return 1;
1240 }
1241
1242 /* reparent a BE onto another FE */
1243 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1244                         struct snd_soc_pcm_runtime *be, int stream)
1245 {
1246         struct snd_soc_dpcm *dpcm;
1247         struct snd_pcm_substream *fe_substream, *be_substream;
1248
1249         /* reparent if BE is connected to other FEs */
1250         if (!be->dpcm[stream].users)
1251                 return;
1252
1253         be_substream = snd_soc_dpcm_get_substream(be, stream);
1254
1255         for_each_dpcm_fe(be, stream, dpcm) {
1256                 if (dpcm->fe == fe)
1257                         continue;
1258
1259                 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1260                         stream ? "capture" : "playback",
1261                         dpcm->fe->dai_link->name,
1262                         stream ? "<-" : "->", dpcm->be->dai_link->name);
1263
1264                 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1265                 be_substream->runtime = fe_substream->runtime;
1266                 break;
1267         }
1268 }
1269
1270 /* disconnect a BE and FE */
1271 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1272 {
1273         struct snd_soc_dpcm *dpcm, *d;
1274
1275         for_each_dpcm_be_safe(fe, stream, dpcm, d) {
1276                 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1277                                 stream ? "capture" : "playback",
1278                                 dpcm->be->dai_link->name);
1279
1280                 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1281                         continue;
1282
1283                 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1284                         stream ? "capture" : "playback", fe->dai_link->name,
1285                         stream ? "<-" : "->", dpcm->be->dai_link->name);
1286
1287                 /* BEs still alive need new FE */
1288                 dpcm_be_reparent(fe, dpcm->be, stream);
1289
1290 #ifdef CONFIG_DEBUG_FS
1291                 debugfs_remove(dpcm->debugfs_state);
1292 #endif
1293                 list_del(&dpcm->list_be);
1294                 list_del(&dpcm->list_fe);
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
1440         /* Destroy any old FE <--> BE connections */
1441         for_each_dpcm_be(fe, stream, dpcm) {
1442                 unsigned int i;
1443
1444                 /* is there a valid CPU DAI widget for this BE */
1445                 widget = dai_get_widget(dpcm->be->cpu_dai, stream);
1446
1447                 /* prune the BE if it's no longer in our active list */
1448                 if (widget && widget_in_list(list, widget))
1449                         continue;
1450
1451                 /* is there a valid CODEC DAI widget for this BE */
1452                 for_each_rtd_codec_dai(dpcm->be, i, dai) {
1453                         widget = dai_get_widget(dai, stream);
1454
1455                         /* prune the BE if it's no longer in our active list */
1456                         if (widget && widget_in_list(list, widget))
1457                                 continue;
1458                 }
1459
1460                 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1461                         stream ? "capture" : "playback",
1462                         dpcm->be->dai_link->name, fe->dai_link->name);
1463                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1464                 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1465                 prune++;
1466         }
1467
1468         dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1469         return prune;
1470 }
1471
1472 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1473         struct snd_soc_dapm_widget_list **list_)
1474 {
1475         struct snd_soc_card *card = fe->card;
1476         struct snd_soc_dapm_widget_list *list = *list_;
1477         struct snd_soc_pcm_runtime *be;
1478         int i, new = 0, err;
1479
1480         /* Create any new FE <--> BE connections */
1481         for (i = 0; i < list->num_widgets; i++) {
1482
1483                 switch (list->widgets[i]->id) {
1484                 case snd_soc_dapm_dai_in:
1485                         if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1486                                 continue;
1487                         break;
1488                 case snd_soc_dapm_dai_out:
1489                         if (stream != SNDRV_PCM_STREAM_CAPTURE)
1490                                 continue;
1491                         break;
1492                 default:
1493                         continue;
1494                 }
1495
1496                 /* is there a valid BE rtd for this widget */
1497                 be = dpcm_get_be(card, list->widgets[i], stream);
1498                 if (!be) {
1499                         dev_err(fe->dev, "ASoC: no BE found for %s\n",
1500                                         list->widgets[i]->name);
1501                         continue;
1502                 }
1503
1504                 /* make sure BE is a real BE */
1505                 if (!be->dai_link->no_pcm)
1506                         continue;
1507
1508                 /* don't connect if FE is not running */
1509                 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
1510                         continue;
1511
1512                 /* newly connected FE and BE */
1513                 err = dpcm_be_connect(fe, be, stream);
1514                 if (err < 0) {
1515                         dev_err(fe->dev, "ASoC: can't connect %s\n",
1516                                 list->widgets[i]->name);
1517                         break;
1518                 } else if (err == 0) /* already connected */
1519                         continue;
1520
1521                 /* new */
1522                 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1523                 new++;
1524         }
1525
1526         dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1527         return new;
1528 }
1529
1530 /*
1531  * Find the corresponding BE DAIs that source or sink audio to this
1532  * FE substream.
1533  */
1534 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1535         int stream, struct snd_soc_dapm_widget_list **list, int new)
1536 {
1537         if (new)
1538                 return dpcm_add_paths(fe, stream, list);
1539         else
1540                 return dpcm_prune_paths(fe, stream, list);
1541 }
1542
1543 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1544 {
1545         struct snd_soc_dpcm *dpcm;
1546
1547         for_each_dpcm_be(fe, stream, dpcm)
1548                 dpcm->be->dpcm[stream].runtime_update =
1549                                                 SND_SOC_DPCM_UPDATE_NO;
1550 }
1551
1552 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
1553         int stream)
1554 {
1555         struct snd_soc_dpcm *dpcm;
1556
1557         /* disable any enabled and non active backends */
1558         for_each_dpcm_be(fe, stream, dpcm) {
1559
1560                 struct snd_soc_pcm_runtime *be = dpcm->be;
1561                 struct snd_pcm_substream *be_substream =
1562                         snd_soc_dpcm_get_substream(be, stream);
1563
1564                 if (be->dpcm[stream].users == 0)
1565                         dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1566                                 stream ? "capture" : "playback",
1567                                 be->dpcm[stream].state);
1568
1569                 if (--be->dpcm[stream].users != 0)
1570                         continue;
1571
1572                 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1573                         continue;
1574
1575                 soc_pcm_close(be_substream);
1576                 be_substream->runtime = NULL;
1577                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1578         }
1579 }
1580
1581 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1582 {
1583         struct snd_soc_dpcm *dpcm;
1584         int err, count = 0;
1585
1586         /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1587         for_each_dpcm_be(fe, stream, dpcm) {
1588
1589                 struct snd_soc_pcm_runtime *be = dpcm->be;
1590                 struct snd_pcm_substream *be_substream =
1591                         snd_soc_dpcm_get_substream(be, stream);
1592
1593                 if (!be_substream) {
1594                         dev_err(be->dev, "ASoC: no backend %s stream\n",
1595                                 stream ? "capture" : "playback");
1596                         continue;
1597                 }
1598
1599                 /* is this op for this BE ? */
1600                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1601                         continue;
1602
1603                 /* first time the dpcm is open ? */
1604                 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
1605                         dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1606                                 stream ? "capture" : "playback",
1607                                 be->dpcm[stream].state);
1608
1609                 if (be->dpcm[stream].users++ != 0)
1610                         continue;
1611
1612                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1613                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1614                         continue;
1615
1616                 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1617                         stream ? "capture" : "playback", be->dai_link->name);
1618
1619                 be_substream->runtime = be->dpcm[stream].runtime;
1620                 err = soc_pcm_open(be_substream);
1621                 if (err < 0) {
1622                         dev_err(be->dev, "ASoC: BE open failed %d\n", err);
1623                         be->dpcm[stream].users--;
1624                         if (be->dpcm[stream].users < 0)
1625                                 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1626                                         stream ? "capture" : "playback",
1627                                         be->dpcm[stream].state);
1628
1629                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1630                         goto unwind;
1631                 }
1632
1633                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1634                 count++;
1635         }
1636
1637         return count;
1638
1639 unwind:
1640         /* disable any enabled and non active backends */
1641         for_each_dpcm_be_rollback(fe, stream, dpcm) {
1642                 struct snd_soc_pcm_runtime *be = dpcm->be;
1643                 struct snd_pcm_substream *be_substream =
1644                         snd_soc_dpcm_get_substream(be, stream);
1645
1646                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1647                         continue;
1648
1649                 if (be->dpcm[stream].users == 0)
1650                         dev_err(be->dev, "ASoC: no users %s at close %d\n",
1651                                 stream ? "capture" : "playback",
1652                                 be->dpcm[stream].state);
1653
1654                 if (--be->dpcm[stream].users != 0)
1655                         continue;
1656
1657                 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1658                         continue;
1659
1660                 soc_pcm_close(be_substream);
1661                 be_substream->runtime = NULL;
1662                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1663         }
1664
1665         return err;
1666 }
1667
1668 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
1669                                  struct snd_soc_pcm_stream *stream)
1670 {
1671         runtime->hw.rate_min = stream->rate_min;
1672         runtime->hw.rate_max = min_not_zero(stream->rate_max, UINT_MAX);
1673         runtime->hw.channels_min = stream->channels_min;
1674         runtime->hw.channels_max = stream->channels_max;
1675         if (runtime->hw.formats)
1676                 runtime->hw.formats &= stream->formats;
1677         else
1678                 runtime->hw.formats = stream->formats;
1679         runtime->hw.rates = stream->rates;
1680 }
1681
1682 static void dpcm_runtime_merge_format(struct snd_pcm_substream *substream,
1683                                       u64 *formats)
1684 {
1685         struct snd_soc_pcm_runtime *fe = substream->private_data;
1686         struct snd_soc_dpcm *dpcm;
1687         struct snd_soc_dai *dai;
1688         int stream = substream->stream;
1689
1690         if (!fe->dai_link->dpcm_merged_format)
1691                 return;
1692
1693         /*
1694          * It returns merged BE codec format
1695          * if FE want to use it (= dpcm_merged_format)
1696          */
1697
1698         for_each_dpcm_be(fe, stream, dpcm) {
1699                 struct snd_soc_pcm_runtime *be = dpcm->be;
1700                 struct snd_soc_dai_driver *codec_dai_drv;
1701                 struct snd_soc_pcm_stream *codec_stream;
1702                 int i;
1703
1704                 for_each_rtd_codec_dai(be, i, dai) {
1705                         /*
1706                          * Skip CODECs which don't support the current stream
1707                          * type. See soc_pcm_init_runtime_hw() for more details
1708                          */
1709                         if (!snd_soc_dai_stream_valid(dai, stream))
1710                                 continue;
1711
1712                         codec_dai_drv = dai->driver;
1713                         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1714                                 codec_stream = &codec_dai_drv->playback;
1715                         else
1716                                 codec_stream = &codec_dai_drv->capture;
1717
1718                         *formats &= codec_stream->formats;
1719                 }
1720         }
1721 }
1722
1723 static void dpcm_runtime_merge_chan(struct snd_pcm_substream *substream,
1724                                     unsigned int *channels_min,
1725                                     unsigned int *channels_max)
1726 {
1727         struct snd_soc_pcm_runtime *fe = substream->private_data;
1728         struct snd_soc_dpcm *dpcm;
1729         int stream = substream->stream;
1730
1731         if (!fe->dai_link->dpcm_merged_chan)
1732                 return;
1733
1734         /*
1735          * It returns merged BE codec channel;
1736          * if FE want to use it (= dpcm_merged_chan)
1737          */
1738
1739         for_each_dpcm_be(fe, stream, dpcm) {
1740                 struct snd_soc_pcm_runtime *be = dpcm->be;
1741                 struct snd_soc_dai_driver *cpu_dai_drv =  be->cpu_dai->driver;
1742                 struct snd_soc_dai_driver *codec_dai_drv;
1743                 struct snd_soc_pcm_stream *codec_stream;
1744                 struct snd_soc_pcm_stream *cpu_stream;
1745
1746                 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1747                         cpu_stream = &cpu_dai_drv->playback;
1748                 else
1749                         cpu_stream = &cpu_dai_drv->capture;
1750
1751                 *channels_min = max(*channels_min, cpu_stream->channels_min);
1752                 *channels_max = min(*channels_max, cpu_stream->channels_max);
1753
1754                 /*
1755                  * chan min/max cannot be enforced if there are multiple CODEC
1756                  * DAIs connected to a single CPU DAI, use CPU DAI's directly
1757                  */
1758                 if (be->num_codecs == 1) {
1759                         codec_dai_drv = be->codec_dais[0]->driver;
1760
1761                         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1762                                 codec_stream = &codec_dai_drv->playback;
1763                         else
1764                                 codec_stream = &codec_dai_drv->capture;
1765
1766                         *channels_min = max(*channels_min,
1767                                             codec_stream->channels_min);
1768                         *channels_max = min(*channels_max,
1769                                             codec_stream->channels_max);
1770                 }
1771         }
1772 }
1773
1774 static void dpcm_runtime_merge_rate(struct snd_pcm_substream *substream,
1775                                     unsigned int *rates,
1776                                     unsigned int *rate_min,
1777                                     unsigned int *rate_max)
1778 {
1779         struct snd_soc_pcm_runtime *fe = substream->private_data;
1780         struct snd_soc_dpcm *dpcm;
1781         int stream = substream->stream;
1782
1783         if (!fe->dai_link->dpcm_merged_rate)
1784                 return;
1785
1786         /*
1787          * It returns merged BE codec channel;
1788          * if FE want to use it (= dpcm_merged_chan)
1789          */
1790
1791         for_each_dpcm_be(fe, stream, dpcm) {
1792                 struct snd_soc_pcm_runtime *be = dpcm->be;
1793                 struct snd_soc_dai_driver *cpu_dai_drv =  be->cpu_dai->driver;
1794                 struct snd_soc_dai_driver *codec_dai_drv;
1795                 struct snd_soc_pcm_stream *codec_stream;
1796                 struct snd_soc_pcm_stream *cpu_stream;
1797                 struct snd_soc_dai *dai;
1798                 int i;
1799
1800                 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1801                         cpu_stream = &cpu_dai_drv->playback;
1802                 else
1803                         cpu_stream = &cpu_dai_drv->capture;
1804
1805                 *rate_min = max(*rate_min, cpu_stream->rate_min);
1806                 *rate_max = min_not_zero(*rate_max, cpu_stream->rate_max);
1807                 *rates = snd_pcm_rate_mask_intersect(*rates, cpu_stream->rates);
1808
1809                 for_each_rtd_codec_dai(be, i, dai) {
1810                         /*
1811                          * Skip CODECs which don't support the current stream
1812                          * type. See soc_pcm_init_runtime_hw() for more details
1813                          */
1814                         if (!snd_soc_dai_stream_valid(dai, stream))
1815                                 continue;
1816
1817                         codec_dai_drv = dai->driver;
1818                         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1819                                 codec_stream = &codec_dai_drv->playback;
1820                         else
1821                                 codec_stream = &codec_dai_drv->capture;
1822
1823                         *rate_min = max(*rate_min, codec_stream->rate_min);
1824                         *rate_max = min_not_zero(*rate_max,
1825                                                  codec_stream->rate_max);
1826                         *rates = snd_pcm_rate_mask_intersect(*rates,
1827                                                 codec_stream->rates);
1828                 }
1829         }
1830 }
1831
1832 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
1833 {
1834         struct snd_pcm_runtime *runtime = substream->runtime;
1835         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1836         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1837         struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
1838
1839         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1840                 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback);
1841         else
1842                 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture);
1843
1844         dpcm_runtime_merge_format(substream, &runtime->hw.formats);
1845         dpcm_runtime_merge_chan(substream, &runtime->hw.channels_min,
1846                                 &runtime->hw.channels_max);
1847         dpcm_runtime_merge_rate(substream, &runtime->hw.rates,
1848                                 &runtime->hw.rate_min, &runtime->hw.rate_max);
1849 }
1850
1851 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
1852
1853 /* Set FE's runtime_update state; the state is protected via PCM stream lock
1854  * for avoiding the race with trigger callback.
1855  * If the state is unset and a trigger is pending while the previous operation,
1856  * process the pending trigger action here.
1857  */
1858 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
1859                                      int stream, enum snd_soc_dpcm_update state)
1860 {
1861         struct snd_pcm_substream *substream =
1862                 snd_soc_dpcm_get_substream(fe, stream);
1863
1864         snd_pcm_stream_lock_irq(substream);
1865         if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
1866                 dpcm_fe_dai_do_trigger(substream,
1867                                        fe->dpcm[stream].trigger_pending - 1);
1868                 fe->dpcm[stream].trigger_pending = 0;
1869         }
1870         fe->dpcm[stream].runtime_update = state;
1871         snd_pcm_stream_unlock_irq(substream);
1872 }
1873
1874 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
1875                                int stream)
1876 {
1877         struct snd_soc_dpcm *dpcm;
1878         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1879         struct snd_soc_dai *fe_cpu_dai = fe->cpu_dai;
1880         int err;
1881
1882         /* apply symmetry for FE */
1883         if (soc_pcm_has_symmetry(fe_substream))
1884                 fe_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1885
1886         /* Symmetry only applies if we've got an active stream. */
1887         if (fe_cpu_dai->active) {
1888                 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
1889                 if (err < 0)
1890                         return err;
1891         }
1892
1893         /* apply symmetry for BE */
1894         for_each_dpcm_be(fe, stream, dpcm) {
1895                 struct snd_soc_pcm_runtime *be = dpcm->be;
1896                 struct snd_pcm_substream *be_substream =
1897                         snd_soc_dpcm_get_substream(be, stream);
1898                 struct snd_soc_pcm_runtime *rtd = be_substream->private_data;
1899                 struct snd_soc_dai *codec_dai;
1900                 int i;
1901
1902                 if (rtd->dai_link->be_hw_params_fixup)
1903                         continue;
1904
1905                 if (soc_pcm_has_symmetry(be_substream))
1906                         be_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1907
1908                 /* Symmetry only applies if we've got an active stream. */
1909                 if (rtd->cpu_dai->active) {
1910                         err = soc_pcm_apply_symmetry(fe_substream,
1911                                                      rtd->cpu_dai);
1912                         if (err < 0)
1913                                 return err;
1914                 }
1915
1916                 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1917                         if (codec_dai->active) {
1918                                 err = soc_pcm_apply_symmetry(fe_substream,
1919                                                              codec_dai);
1920                                 if (err < 0)
1921                                         return err;
1922                         }
1923                 }
1924         }
1925
1926         return 0;
1927 }
1928
1929 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1930 {
1931         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1932         struct snd_pcm_runtime *runtime = fe_substream->runtime;
1933         int stream = fe_substream->stream, ret = 0;
1934
1935         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1936
1937         ret = dpcm_be_dai_startup(fe, fe_substream->stream);
1938         if (ret < 0) {
1939                 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
1940                 goto be_err;
1941         }
1942
1943         dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1944
1945         /* start the DAI frontend */
1946         ret = soc_pcm_open(fe_substream);
1947         if (ret < 0) {
1948                 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
1949                 goto unwind;
1950         }
1951
1952         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1953
1954         dpcm_set_fe_runtime(fe_substream);
1955         snd_pcm_limit_hw_rates(runtime);
1956
1957         ret = dpcm_apply_symmetry(fe_substream, stream);
1958         if (ret < 0) {
1959                 dev_err(fe->dev, "ASoC: failed to apply dpcm symmetry %d\n",
1960                         ret);
1961                 goto unwind;
1962         }
1963
1964         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1965         return 0;
1966
1967 unwind:
1968         dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
1969 be_err:
1970         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1971         return ret;
1972 }
1973
1974 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1975 {
1976         struct snd_soc_dpcm *dpcm;
1977
1978         /* only shutdown BEs that are either sinks or sources to this FE DAI */
1979         for_each_dpcm_be(fe, stream, dpcm) {
1980
1981                 struct snd_soc_pcm_runtime *be = dpcm->be;
1982                 struct snd_pcm_substream *be_substream =
1983                         snd_soc_dpcm_get_substream(be, stream);
1984
1985                 /* is this op for this BE ? */
1986                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1987                         continue;
1988
1989                 if (be->dpcm[stream].users == 0)
1990                         dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1991                                 stream ? "capture" : "playback",
1992                                 be->dpcm[stream].state);
1993
1994                 if (--be->dpcm[stream].users != 0)
1995                         continue;
1996
1997                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1998                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)) {
1999                         soc_pcm_hw_free(be_substream);
2000                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2001                 }
2002
2003                 dev_dbg(be->dev, "ASoC: close BE %s\n",
2004                         be->dai_link->name);
2005
2006                 soc_pcm_close(be_substream);
2007                 be_substream->runtime = NULL;
2008
2009                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
2010         }
2011         return 0;
2012 }
2013
2014 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
2015 {
2016         struct snd_soc_pcm_runtime *fe = substream->private_data;
2017         int stream = substream->stream;
2018
2019         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2020
2021         /* shutdown the BEs */
2022         dpcm_be_dai_shutdown(fe, substream->stream);
2023
2024         dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
2025
2026         /* now shutdown the frontend */
2027         soc_pcm_close(substream);
2028
2029         /* run the stream event for each BE */
2030         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
2031
2032         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
2033         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2034         return 0;
2035 }
2036
2037 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
2038 {
2039         struct snd_soc_dpcm *dpcm;
2040
2041         /* only hw_params backends that are either sinks or sources
2042          * to this frontend DAI */
2043         for_each_dpcm_be(fe, stream, dpcm) {
2044
2045                 struct snd_soc_pcm_runtime *be = dpcm->be;
2046                 struct snd_pcm_substream *be_substream =
2047                         snd_soc_dpcm_get_substream(be, stream);
2048
2049                 /* is this op for this BE ? */
2050                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2051                         continue;
2052
2053                 /* only free hw when no longer used - check all FEs */
2054                 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2055                                 continue;
2056
2057                 /* do not free hw if this BE is used by other FE */
2058                 if (be->dpcm[stream].users > 1)
2059                         continue;
2060
2061                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2062                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2063                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2064                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
2065                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2066                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2067                         continue;
2068
2069                 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
2070                         be->dai_link->name);
2071
2072                 soc_pcm_hw_free(be_substream);
2073
2074                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2075         }
2076
2077         return 0;
2078 }
2079
2080 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
2081 {
2082         struct snd_soc_pcm_runtime *fe = substream->private_data;
2083         int err, stream = substream->stream;
2084
2085         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2086         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2087
2088         dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
2089
2090         /* call hw_free on the frontend */
2091         err = soc_pcm_hw_free(substream);
2092         if (err < 0)
2093                 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
2094                         fe->dai_link->name);
2095
2096         /* only hw_params backends that are either sinks or sources
2097          * to this frontend DAI */
2098         err = dpcm_be_dai_hw_free(fe, stream);
2099
2100         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2101         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2102
2103         mutex_unlock(&fe->card->mutex);
2104         return 0;
2105 }
2106
2107 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
2108 {
2109         struct snd_soc_dpcm *dpcm;
2110         int ret;
2111
2112         for_each_dpcm_be(fe, stream, dpcm) {
2113
2114                 struct snd_soc_pcm_runtime *be = dpcm->be;
2115                 struct snd_pcm_substream *be_substream =
2116                         snd_soc_dpcm_get_substream(be, stream);
2117
2118                 /* is this op for this BE ? */
2119                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2120                         continue;
2121
2122                 /* copy params for each dpcm */
2123                 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
2124                                 sizeof(struct snd_pcm_hw_params));
2125
2126                 /* perform any hw_params fixups */
2127                 if (be->dai_link->be_hw_params_fixup) {
2128                         ret = be->dai_link->be_hw_params_fixup(be,
2129                                         &dpcm->hw_params);
2130                         if (ret < 0) {
2131                                 dev_err(be->dev,
2132                                         "ASoC: hw_params BE fixup failed %d\n",
2133                                         ret);
2134                                 goto unwind;
2135                         }
2136                 }
2137
2138                 /* only allow hw_params() if no connected FEs are running */
2139                 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
2140                         continue;
2141
2142                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2143                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2144                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
2145                         continue;
2146
2147                 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
2148                         be->dai_link->name);
2149
2150                 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
2151                 if (ret < 0) {
2152                         dev_err(dpcm->be->dev,
2153                                 "ASoC: hw_params BE failed %d\n", ret);
2154                         goto unwind;
2155                 }
2156
2157                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2158         }
2159         return 0;
2160
2161 unwind:
2162         /* disable any enabled and non active backends */
2163         for_each_dpcm_be_rollback(fe, stream, dpcm) {
2164                 struct snd_soc_pcm_runtime *be = dpcm->be;
2165                 struct snd_pcm_substream *be_substream =
2166                         snd_soc_dpcm_get_substream(be, stream);
2167
2168                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2169                         continue;
2170
2171                 /* only allow hw_free() if no connected FEs are running */
2172                 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2173                         continue;
2174
2175                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2176                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2177                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2178                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2179                         continue;
2180
2181                 soc_pcm_hw_free(be_substream);
2182         }
2183
2184         return ret;
2185 }
2186
2187 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
2188                                  struct snd_pcm_hw_params *params)
2189 {
2190         struct snd_soc_pcm_runtime *fe = substream->private_data;
2191         int ret, stream = substream->stream;
2192
2193         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2194         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2195
2196         memcpy(&fe->dpcm[substream->stream].hw_params, params,
2197                         sizeof(struct snd_pcm_hw_params));
2198         ret = dpcm_be_dai_hw_params(fe, substream->stream);
2199         if (ret < 0) {
2200                 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
2201                 goto out;
2202         }
2203
2204         dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
2205                         fe->dai_link->name, params_rate(params),
2206                         params_channels(params), params_format(params));
2207
2208         /* call hw_params on the frontend */
2209         ret = soc_pcm_hw_params(substream, params);
2210         if (ret < 0) {
2211                 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
2212                 dpcm_be_dai_hw_free(fe, stream);
2213          } else
2214                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2215
2216 out:
2217         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2218         mutex_unlock(&fe->card->mutex);
2219         return ret;
2220 }
2221
2222 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
2223                 struct snd_pcm_substream *substream, int cmd)
2224 {
2225         int ret;
2226
2227         dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n",
2228                         dpcm->be->dai_link->name, cmd);
2229
2230         ret = soc_pcm_trigger(substream, cmd);
2231         if (ret < 0)
2232                 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret);
2233
2234         return ret;
2235 }
2236
2237 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
2238                                int cmd)
2239 {
2240         struct snd_soc_dpcm *dpcm;
2241         int ret = 0;
2242
2243         for_each_dpcm_be(fe, stream, dpcm) {
2244
2245                 struct snd_soc_pcm_runtime *be = dpcm->be;
2246                 struct snd_pcm_substream *be_substream =
2247                         snd_soc_dpcm_get_substream(be, stream);
2248
2249                 /* is this op for this BE ? */
2250                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2251                         continue;
2252
2253                 switch (cmd) {
2254                 case SNDRV_PCM_TRIGGER_START:
2255                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2256                             (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2257                                 continue;
2258
2259                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2260                         if (ret)
2261                                 return ret;
2262
2263                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2264                         break;
2265                 case SNDRV_PCM_TRIGGER_RESUME:
2266                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2267                                 continue;
2268
2269                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2270                         if (ret)
2271                                 return ret;
2272
2273                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2274                         break;
2275                 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2276                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2277                                 continue;
2278
2279                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2280                         if (ret)
2281                                 return ret;
2282
2283                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2284                         break;
2285                 case SNDRV_PCM_TRIGGER_STOP:
2286                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2287                                 continue;
2288
2289                         if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2290                                 continue;
2291
2292                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2293                         if (ret)
2294                                 return ret;
2295
2296                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2297                         break;
2298                 case SNDRV_PCM_TRIGGER_SUSPEND:
2299                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2300                                 continue;
2301
2302                         if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2303                                 continue;
2304
2305                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2306                         if (ret)
2307                                 return ret;
2308
2309                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
2310                         break;
2311                 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2312                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2313                                 continue;
2314
2315                         if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2316                                 continue;
2317
2318                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2319                         if (ret)
2320                                 return ret;
2321
2322                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2323                         break;
2324                 }
2325         }
2326
2327         return ret;
2328 }
2329 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2330
2331 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
2332 {
2333         struct snd_soc_pcm_runtime *fe = substream->private_data;
2334         int stream = substream->stream, ret;
2335         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2336
2337         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2338
2339         switch (trigger) {
2340         case SND_SOC_DPCM_TRIGGER_PRE:
2341                 /* call trigger on the frontend before the backend. */
2342
2343                 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2344                                 fe->dai_link->name, cmd);
2345
2346                 ret = soc_pcm_trigger(substream, cmd);
2347                 if (ret < 0) {
2348                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2349                         goto out;
2350                 }
2351
2352                 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2353                 break;
2354         case SND_SOC_DPCM_TRIGGER_POST:
2355                 /* call trigger on the frontend after the backend. */
2356
2357                 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2358                 if (ret < 0) {
2359                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2360                         goto out;
2361                 }
2362
2363                 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2364                                 fe->dai_link->name, cmd);
2365
2366                 ret = soc_pcm_trigger(substream, cmd);
2367                 break;
2368         case SND_SOC_DPCM_TRIGGER_BESPOKE:
2369                 /* bespoke trigger() - handles both FE and BEs */
2370
2371                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
2372                                 fe->dai_link->name, cmd);
2373
2374                 ret = soc_pcm_bespoke_trigger(substream, cmd);
2375                 if (ret < 0) {
2376                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2377                         goto out;
2378                 }
2379                 break;
2380         default:
2381                 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
2382                                 fe->dai_link->name);
2383                 ret = -EINVAL;
2384                 goto out;
2385         }
2386
2387         switch (cmd) {
2388         case SNDRV_PCM_TRIGGER_START:
2389         case SNDRV_PCM_TRIGGER_RESUME:
2390         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2391                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2392                 break;
2393         case SNDRV_PCM_TRIGGER_STOP:
2394         case SNDRV_PCM_TRIGGER_SUSPEND:
2395                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2396                 break;
2397         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2398                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2399                 break;
2400         }
2401
2402 out:
2403         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2404         return ret;
2405 }
2406
2407 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2408 {
2409         struct snd_soc_pcm_runtime *fe = substream->private_data;
2410         int stream = substream->stream;
2411
2412         /* if FE's runtime_update is already set, we're in race;
2413          * process this trigger later at exit
2414          */
2415         if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2416                 fe->dpcm[stream].trigger_pending = cmd + 1;
2417                 return 0; /* delayed, assuming it's successful */
2418         }
2419
2420         /* we're alone, let's trigger */
2421         return dpcm_fe_dai_do_trigger(substream, cmd);
2422 }
2423
2424 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2425 {
2426         struct snd_soc_dpcm *dpcm;
2427         int ret = 0;
2428
2429         for_each_dpcm_be(fe, stream, dpcm) {
2430
2431                 struct snd_soc_pcm_runtime *be = dpcm->be;
2432                 struct snd_pcm_substream *be_substream =
2433                         snd_soc_dpcm_get_substream(be, stream);
2434
2435                 /* is this op for this BE ? */
2436                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2437                         continue;
2438
2439                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2440                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2441                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2442                         continue;
2443
2444                 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2445                         be->dai_link->name);
2446
2447                 ret = soc_pcm_prepare(be_substream);
2448                 if (ret < 0) {
2449                         dev_err(be->dev, "ASoC: backend prepare failed %d\n",
2450                                 ret);
2451                         break;
2452                 }
2453
2454                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2455         }
2456         return ret;
2457 }
2458
2459 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2460 {
2461         struct snd_soc_pcm_runtime *fe = substream->private_data;
2462         int stream = substream->stream, ret = 0;
2463
2464         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2465
2466         dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2467
2468         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2469
2470         /* there is no point preparing this FE if there are no BEs */
2471         if (list_empty(&fe->dpcm[stream].be_clients)) {
2472                 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2473                                 fe->dai_link->name);
2474                 ret = -EINVAL;
2475                 goto out;
2476         }
2477
2478         ret = dpcm_be_dai_prepare(fe, substream->stream);
2479         if (ret < 0)
2480                 goto out;
2481
2482         /* call prepare on the frontend */
2483         ret = soc_pcm_prepare(substream);
2484         if (ret < 0) {
2485                 dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
2486                         fe->dai_link->name);
2487                 goto out;
2488         }
2489
2490         /* run the stream event for each BE */
2491         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
2492         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2493
2494 out:
2495         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2496         mutex_unlock(&fe->card->mutex);
2497
2498         return ret;
2499 }
2500
2501 static int soc_pcm_ioctl(struct snd_pcm_substream *substream,
2502                      unsigned int cmd, void *arg)
2503 {
2504         struct snd_soc_pcm_runtime *rtd = substream->private_data;
2505         struct snd_soc_component *component;
2506         struct snd_soc_rtdcom_list *rtdcom;
2507
2508         for_each_rtdcom(rtd, rtdcom) {
2509                 component = rtdcom->component;
2510
2511                 if (!component->driver->ops ||
2512                     !component->driver->ops->ioctl)
2513                         continue;
2514
2515                 /* FIXME: use 1st ioctl */
2516                 return component->driver->ops->ioctl(substream, cmd, arg);
2517         }
2518
2519         return snd_pcm_lib_ioctl(substream, cmd, arg);
2520 }
2521
2522 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2523 {
2524         struct snd_pcm_substream *substream =
2525                 snd_soc_dpcm_get_substream(fe, stream);
2526         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2527         int err;
2528
2529         dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2530                         stream ? "capture" : "playback", fe->dai_link->name);
2531
2532         if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2533                 /* call bespoke trigger - FE takes care of all BE triggers */
2534                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2535                                 fe->dai_link->name);
2536
2537                 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2538                 if (err < 0)
2539                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2540         } else {
2541                 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2542                         fe->dai_link->name);
2543
2544                 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2545                 if (err < 0)
2546                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2547         }
2548
2549         err = dpcm_be_dai_hw_free(fe, stream);
2550         if (err < 0)
2551                 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
2552
2553         err = dpcm_be_dai_shutdown(fe, stream);
2554         if (err < 0)
2555                 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
2556
2557         /* run the stream event for each BE */
2558         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2559
2560         return 0;
2561 }
2562
2563 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2564 {
2565         struct snd_pcm_substream *substream =
2566                 snd_soc_dpcm_get_substream(fe, stream);
2567         struct snd_soc_dpcm *dpcm;
2568         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2569         int ret;
2570
2571         dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2572                         stream ? "capture" : "playback", fe->dai_link->name);
2573
2574         /* Only start the BE if the FE is ready */
2575         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2576                 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
2577                 return -EINVAL;
2578
2579         /* startup must always be called for new BEs */
2580         ret = dpcm_be_dai_startup(fe, stream);
2581         if (ret < 0)
2582                 goto disconnect;
2583
2584         /* keep going if FE state is > open */
2585         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2586                 return 0;
2587
2588         ret = dpcm_be_dai_hw_params(fe, stream);
2589         if (ret < 0)
2590                 goto close;
2591
2592         /* keep going if FE state is > hw_params */
2593         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2594                 return 0;
2595
2596
2597         ret = dpcm_be_dai_prepare(fe, stream);
2598         if (ret < 0)
2599                 goto hw_free;
2600
2601         /* run the stream event for each BE */
2602         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2603
2604         /* keep going if FE state is > prepare */
2605         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2606                 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2607                 return 0;
2608
2609         if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2610                 /* call trigger on the frontend - FE takes care of all BE triggers */
2611                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
2612                                 fe->dai_link->name);
2613
2614                 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2615                 if (ret < 0) {
2616                         dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
2617                         goto hw_free;
2618                 }
2619         } else {
2620                 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2621                         fe->dai_link->name);
2622
2623                 ret = dpcm_be_dai_trigger(fe, stream,
2624                                         SNDRV_PCM_TRIGGER_START);
2625                 if (ret < 0) {
2626                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2627                         goto hw_free;
2628                 }
2629         }
2630
2631         return 0;
2632
2633 hw_free:
2634         dpcm_be_dai_hw_free(fe, stream);
2635 close:
2636         dpcm_be_dai_shutdown(fe, stream);
2637 disconnect:
2638         /* disconnect any non started BEs */
2639         for_each_dpcm_be(fe, stream, dpcm) {
2640                 struct snd_soc_pcm_runtime *be = dpcm->be;
2641                 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2642                                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2643         }
2644
2645         return ret;
2646 }
2647
2648 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
2649 {
2650         int ret;
2651
2652         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2653         ret = dpcm_run_update_startup(fe, stream);
2654         if (ret < 0)
2655                 dev_err(fe->dev, "ASoC: failed to startup some BEs\n");
2656         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2657
2658         return ret;
2659 }
2660
2661 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
2662 {
2663         int ret;
2664
2665         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2666         ret = dpcm_run_update_shutdown(fe, stream);
2667         if (ret < 0)
2668                 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
2669         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2670
2671         return ret;
2672 }
2673
2674 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new)
2675 {
2676         struct snd_soc_dapm_widget_list *list;
2677         int count, paths;
2678
2679         if (!fe->dai_link->dynamic)
2680                 return 0;
2681
2682         /* only check active links */
2683         if (!fe->cpu_dai->active)
2684                 return 0;
2685
2686         /* DAPM sync will call this to update DSP paths */
2687         dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n",
2688                 new ? "new" : "old", fe->dai_link->name);
2689
2690         /* skip if FE doesn't have playback capability */
2691         if (!fe->cpu_dai->driver->playback.channels_min ||
2692             !fe->codec_dai->driver->playback.channels_min)
2693                 goto capture;
2694
2695         /* skip if FE isn't currently playing */
2696         if (!fe->cpu_dai->playback_active || !fe->codec_dai->playback_active)
2697                 goto capture;
2698
2699         paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
2700         if (paths < 0) {
2701                 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2702                          fe->dai_link->name,  "playback");
2703                 return paths;
2704         }
2705
2706         /* update any playback paths */
2707         count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, new);
2708         if (count) {
2709                 if (new)
2710                         dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2711                 else
2712                         dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2713
2714                 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2715                 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2716         }
2717
2718         dpcm_path_put(&list);
2719
2720 capture:
2721         /* skip if FE doesn't have capture capability */
2722         if (!fe->cpu_dai->driver->capture.channels_min ||
2723             !fe->codec_dai->driver->capture.channels_min)
2724                 return 0;
2725
2726         /* skip if FE isn't currently capturing */
2727         if (!fe->cpu_dai->capture_active || !fe->codec_dai->capture_active)
2728                 return 0;
2729
2730         paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
2731         if (paths < 0) {
2732                 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2733                          fe->dai_link->name,  "capture");
2734                 return paths;
2735         }
2736
2737         /* update any old capture paths */
2738         count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, new);
2739         if (count) {
2740                 if (new)
2741                         dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2742                 else
2743                         dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2744
2745                 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2746                 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2747         }
2748
2749         dpcm_path_put(&list);
2750
2751         return 0;
2752 }
2753
2754 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2755  * any DAI links.
2756  */
2757 int soc_dpcm_runtime_update(struct snd_soc_card *card)
2758 {
2759         struct snd_soc_pcm_runtime *fe;
2760         int ret = 0;
2761
2762         mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2763         /* shutdown all old paths first */
2764         for_each_card_rtds(card, fe) {
2765                 ret = soc_dpcm_fe_runtime_update(fe, 0);
2766                 if (ret)
2767                         goto out;
2768         }
2769
2770         /* bring new paths up */
2771         for_each_card_rtds(card, fe) {
2772                 ret = soc_dpcm_fe_runtime_update(fe, 1);
2773                 if (ret)
2774                         goto out;
2775         }
2776
2777 out:
2778         mutex_unlock(&card->mutex);
2779         return ret;
2780 }
2781 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
2782 {
2783         struct snd_soc_dpcm *dpcm;
2784         struct snd_soc_dai *dai;
2785
2786         for_each_dpcm_be(fe, SNDRV_PCM_STREAM_PLAYBACK, dpcm) {
2787
2788                 struct snd_soc_pcm_runtime *be = dpcm->be;
2789                 int i;
2790
2791                 if (be->dai_link->ignore_suspend)
2792                         continue;
2793
2794                 for_each_rtd_codec_dai(be, i, dai) {
2795                         struct snd_soc_dai_driver *drv = dai->driver;
2796
2797                         dev_dbg(be->dev, "ASoC: BE digital mute %s\n",
2798                                          be->dai_link->name);
2799
2800                         if (drv->ops && drv->ops->digital_mute &&
2801                                                         dai->playback_active)
2802                                 drv->ops->digital_mute(dai, mute);
2803                 }
2804         }
2805
2806         return 0;
2807 }
2808
2809 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2810 {
2811         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2812         struct snd_soc_dpcm *dpcm;
2813         struct snd_soc_dapm_widget_list *list;
2814         int ret;
2815         int stream = fe_substream->stream;
2816
2817         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2818         fe->dpcm[stream].runtime = fe_substream->runtime;
2819
2820         ret = dpcm_path_get(fe, stream, &list);
2821         if (ret < 0) {
2822                 mutex_unlock(&fe->card->mutex);
2823                 return ret;
2824         } else if (ret == 0) {
2825                 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
2826                         fe->dai_link->name, stream ? "capture" : "playback");
2827         }
2828
2829         /* calculate valid and active FE <-> BE dpcms */
2830         dpcm_process_paths(fe, stream, &list, 1);
2831
2832         ret = dpcm_fe_dai_startup(fe_substream);
2833         if (ret < 0) {
2834                 /* clean up all links */
2835                 for_each_dpcm_be(fe, stream, dpcm)
2836                         dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2837
2838                 dpcm_be_disconnect(fe, stream);
2839                 fe->dpcm[stream].runtime = NULL;
2840         }
2841
2842         dpcm_clear_pending_state(fe, stream);
2843         dpcm_path_put(&list);
2844         mutex_unlock(&fe->card->mutex);
2845         return ret;
2846 }
2847
2848 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2849 {
2850         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2851         struct snd_soc_dpcm *dpcm;
2852         int stream = fe_substream->stream, ret;
2853
2854         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2855         ret = dpcm_fe_dai_shutdown(fe_substream);
2856
2857         /* mark FE's links ready to prune */
2858         for_each_dpcm_be(fe, stream, dpcm)
2859                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2860
2861         dpcm_be_disconnect(fe, stream);
2862
2863         fe->dpcm[stream].runtime = NULL;
2864         mutex_unlock(&fe->card->mutex);
2865         return ret;
2866 }
2867
2868 static void soc_pcm_private_free(struct snd_pcm *pcm)
2869 {
2870         struct snd_soc_pcm_runtime *rtd = pcm->private_data;
2871         struct snd_soc_rtdcom_list *rtdcom;
2872         struct snd_soc_component *component;
2873
2874         /* need to sync the delayed work before releasing resources */
2875         flush_delayed_work(&rtd->delayed_work);
2876         for_each_rtdcom(rtd, rtdcom) {
2877                 component = rtdcom->component;
2878
2879                 if (component->driver->pcm_free)
2880                         component->driver->pcm_free(pcm);
2881         }
2882 }
2883
2884 static int soc_rtdcom_ack(struct snd_pcm_substream *substream)
2885 {
2886         struct snd_soc_pcm_runtime *rtd = substream->private_data;
2887         struct snd_soc_rtdcom_list *rtdcom;
2888         struct snd_soc_component *component;
2889
2890         for_each_rtdcom(rtd, rtdcom) {
2891                 component = rtdcom->component;
2892
2893                 if (!component->driver->ops ||
2894                     !component->driver->ops->ack)
2895                         continue;
2896
2897                 /* FIXME. it returns 1st ask now */
2898                 return component->driver->ops->ack(substream);
2899         }
2900
2901         return -EINVAL;
2902 }
2903
2904 static int soc_rtdcom_copy_user(struct snd_pcm_substream *substream, int channel,
2905                                 unsigned long pos, void __user *buf,
2906                                 unsigned long bytes)
2907 {
2908         struct snd_soc_pcm_runtime *rtd = substream->private_data;
2909         struct snd_soc_rtdcom_list *rtdcom;
2910         struct snd_soc_component *component;
2911
2912         for_each_rtdcom(rtd, rtdcom) {
2913                 component = rtdcom->component;
2914
2915                 if (!component->driver->ops ||
2916                     !component->driver->ops->copy_user)
2917                         continue;
2918
2919                 /* FIXME. it returns 1st copy now */
2920                 return component->driver->ops->copy_user(substream, channel,
2921                                                          pos, buf, bytes);
2922         }
2923
2924         return -EINVAL;
2925 }
2926
2927 static int soc_rtdcom_copy_kernel(struct snd_pcm_substream *substream, int channel,
2928                                   unsigned long pos, void *buf, unsigned long bytes)
2929 {
2930         struct snd_soc_pcm_runtime *rtd = substream->private_data;
2931         struct snd_soc_rtdcom_list *rtdcom;
2932         struct snd_soc_component *component;
2933
2934         for_each_rtdcom(rtd, rtdcom) {
2935                 component = rtdcom->component;
2936
2937                 if (!component->driver->ops ||
2938                     !component->driver->ops->copy_kernel)
2939                         continue;
2940
2941                 /* FIXME. it returns 1st copy now */
2942                 return component->driver->ops->copy_kernel(substream, channel,
2943                                                            pos, buf, bytes);
2944         }
2945
2946         return -EINVAL;
2947 }
2948
2949 static int soc_rtdcom_fill_silence(struct snd_pcm_substream *substream, int channel,
2950                                    unsigned long pos, unsigned long bytes)
2951 {
2952         struct snd_soc_pcm_runtime *rtd = substream->private_data;
2953         struct snd_soc_rtdcom_list *rtdcom;
2954         struct snd_soc_component *component;
2955
2956         for_each_rtdcom(rtd, rtdcom) {
2957                 component = rtdcom->component;
2958
2959                 if (!component->driver->ops ||
2960                     !component->driver->ops->fill_silence)
2961                         continue;
2962
2963                 /* FIXME. it returns 1st silence now */
2964                 return component->driver->ops->fill_silence(substream, channel,
2965                                                             pos, bytes);
2966         }
2967
2968         return -EINVAL;
2969 }
2970
2971 static struct page *soc_rtdcom_page(struct snd_pcm_substream *substream,
2972                                     unsigned long offset)
2973 {
2974         struct snd_soc_pcm_runtime *rtd = substream->private_data;
2975         struct snd_soc_rtdcom_list *rtdcom;
2976         struct snd_soc_component *component;
2977         struct page *page;
2978
2979         for_each_rtdcom(rtd, rtdcom) {
2980                 component = rtdcom->component;
2981
2982                 if (!component->driver->ops ||
2983                     !component->driver->ops->page)
2984                         continue;
2985
2986                 /* FIXME. it returns 1st page now */
2987                 page = component->driver->ops->page(substream, offset);
2988                 if (page)
2989                         return page;
2990         }
2991
2992         return NULL;
2993 }
2994
2995 static int soc_rtdcom_mmap(struct snd_pcm_substream *substream,
2996                            struct vm_area_struct *vma)
2997 {
2998         struct snd_soc_pcm_runtime *rtd = substream->private_data;
2999         struct snd_soc_rtdcom_list *rtdcom;
3000         struct snd_soc_component *component;
3001
3002         for_each_rtdcom(rtd, rtdcom) {
3003                 component = rtdcom->component;
3004
3005                 if (!component->driver->ops ||
3006                     !component->driver->ops->mmap)
3007                         continue;
3008
3009                 /* FIXME. it returns 1st mmap now */
3010                 return component->driver->ops->mmap(substream, vma);
3011         }
3012
3013         return -EINVAL;
3014 }
3015
3016 /* create a new pcm */
3017 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
3018 {
3019         struct snd_soc_dai *codec_dai;
3020         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
3021         struct snd_soc_component *component;
3022         struct snd_soc_rtdcom_list *rtdcom;
3023         struct snd_pcm *pcm;
3024         char new_name[64];
3025         int ret = 0, playback = 0, capture = 0;
3026         int i;
3027
3028         if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
3029                 playback = rtd->dai_link->dpcm_playback;
3030                 capture = rtd->dai_link->dpcm_capture;
3031         } else {
3032                 for_each_rtd_codec_dai(rtd, i, codec_dai) {
3033                         if (codec_dai->driver->playback.channels_min)
3034                                 playback = 1;
3035                         if (codec_dai->driver->capture.channels_min)
3036                                 capture = 1;
3037                 }
3038
3039                 capture = capture && cpu_dai->driver->capture.channels_min;
3040                 playback = playback && cpu_dai->driver->playback.channels_min;
3041         }
3042
3043         if (rtd->dai_link->playback_only) {
3044                 playback = 1;
3045                 capture = 0;
3046         }
3047
3048         if (rtd->dai_link->capture_only) {
3049                 playback = 0;
3050                 capture = 1;
3051         }
3052
3053         /* create the PCM */
3054         if (rtd->dai_link->no_pcm) {
3055                 snprintf(new_name, sizeof(new_name), "(%s)",
3056                         rtd->dai_link->stream_name);
3057
3058                 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
3059                                 playback, capture, &pcm);
3060         } else {
3061                 if (rtd->dai_link->dynamic)
3062                         snprintf(new_name, sizeof(new_name), "%s (*)",
3063                                 rtd->dai_link->stream_name);
3064                 else
3065                         snprintf(new_name, sizeof(new_name), "%s %s-%d",
3066                                 rtd->dai_link->stream_name,
3067                                 (rtd->num_codecs > 1) ?
3068                                 "multicodec" : rtd->codec_dai->name, num);
3069
3070                 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
3071                         capture, &pcm);
3072         }
3073         if (ret < 0) {
3074                 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
3075                         rtd->dai_link->name);
3076                 return ret;
3077         }
3078         dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
3079
3080         /* DAPM dai link stream work */
3081         INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
3082
3083         pcm->nonatomic = rtd->dai_link->nonatomic;
3084         rtd->pcm = pcm;
3085         pcm->private_data = rtd;
3086
3087         if (rtd->dai_link->no_pcm) {
3088                 if (playback)
3089                         pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
3090                 if (capture)
3091                         pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
3092                 goto out;
3093         }
3094
3095         /* ASoC PCM operations */
3096         if (rtd->dai_link->dynamic) {
3097                 rtd->ops.open           = dpcm_fe_dai_open;
3098                 rtd->ops.hw_params      = dpcm_fe_dai_hw_params;
3099                 rtd->ops.prepare        = dpcm_fe_dai_prepare;
3100                 rtd->ops.trigger        = dpcm_fe_dai_trigger;
3101                 rtd->ops.hw_free        = dpcm_fe_dai_hw_free;
3102                 rtd->ops.close          = dpcm_fe_dai_close;
3103                 rtd->ops.pointer        = soc_pcm_pointer;
3104                 rtd->ops.ioctl          = soc_pcm_ioctl;
3105         } else {
3106                 rtd->ops.open           = soc_pcm_open;
3107                 rtd->ops.hw_params      = soc_pcm_hw_params;
3108                 rtd->ops.prepare        = soc_pcm_prepare;
3109                 rtd->ops.trigger        = soc_pcm_trigger;
3110                 rtd->ops.hw_free        = soc_pcm_hw_free;
3111                 rtd->ops.close          = soc_pcm_close;
3112                 rtd->ops.pointer        = soc_pcm_pointer;
3113                 rtd->ops.ioctl          = soc_pcm_ioctl;
3114         }
3115
3116         for_each_rtdcom(rtd, rtdcom) {
3117                 const struct snd_pcm_ops *ops = rtdcom->component->driver->ops;
3118
3119                 if (!ops)
3120                         continue;
3121
3122                 if (ops->ack)
3123                         rtd->ops.ack            = soc_rtdcom_ack;
3124                 if (ops->copy_user)
3125                         rtd->ops.copy_user      = soc_rtdcom_copy_user;
3126                 if (ops->copy_kernel)
3127                         rtd->ops.copy_kernel    = soc_rtdcom_copy_kernel;
3128                 if (ops->fill_silence)
3129                         rtd->ops.fill_silence   = soc_rtdcom_fill_silence;
3130                 if (ops->page)
3131                         rtd->ops.page           = soc_rtdcom_page;
3132                 if (ops->mmap)
3133                         rtd->ops.mmap           = soc_rtdcom_mmap;
3134         }
3135
3136         if (playback)
3137                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
3138
3139         if (capture)
3140                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
3141
3142         for_each_rtdcom(rtd, rtdcom) {
3143                 component = rtdcom->component;
3144
3145                 if (!component->driver->pcm_new)
3146                         continue;
3147
3148                 ret = component->driver->pcm_new(rtd);
3149                 if (ret < 0) {
3150                         dev_err(component->dev,
3151                                 "ASoC: pcm constructor failed: %d\n",
3152                                 ret);
3153                         return ret;
3154                 }
3155         }
3156
3157         pcm->private_free = soc_pcm_private_free;
3158 out:
3159         dev_info(rtd->card->dev, "%s <-> %s mapping ok\n",
3160                  (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name,
3161                  cpu_dai->name);
3162         return ret;
3163 }
3164
3165 /* is the current PCM operation for this FE ? */
3166 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
3167 {
3168         if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
3169                 return 1;
3170         return 0;
3171 }
3172 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
3173
3174 /* is the current PCM operation for this BE ? */
3175 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
3176                 struct snd_soc_pcm_runtime *be, int stream)
3177 {
3178         if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
3179            ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
3180                   be->dpcm[stream].runtime_update))
3181                 return 1;
3182         return 0;
3183 }
3184 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
3185
3186 /* get the substream for this BE */
3187 struct snd_pcm_substream *
3188         snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
3189 {
3190         return be->pcm->streams[stream].substream;
3191 }
3192 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
3193
3194 /* get the BE runtime state */
3195 enum snd_soc_dpcm_state
3196         snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream)
3197 {
3198         return be->dpcm[stream].state;
3199 }
3200 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state);
3201
3202 /* set the BE runtime state */
3203 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be,
3204                 int stream, enum snd_soc_dpcm_state state)
3205 {
3206         be->dpcm[stream].state = state;
3207 }
3208 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state);
3209
3210 /*
3211  * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
3212  * are not running, paused or suspended for the specified stream direction.
3213  */
3214 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
3215                 struct snd_soc_pcm_runtime *be, int stream)
3216 {
3217         struct snd_soc_dpcm *dpcm;
3218         int state;
3219
3220         for_each_dpcm_fe(be, stream, dpcm) {
3221
3222                 if (dpcm->fe == fe)
3223                         continue;
3224
3225                 state = dpcm->fe->dpcm[stream].state;
3226                 if (state == SND_SOC_DPCM_STATE_START ||
3227                         state == SND_SOC_DPCM_STATE_PAUSED ||
3228                         state == SND_SOC_DPCM_STATE_SUSPEND)
3229                         return 0;
3230         }
3231
3232         /* it's safe to free/stop this BE DAI */
3233         return 1;
3234 }
3235 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
3236
3237 /*
3238  * We can only change hw params a BE DAI if any of it's FE are not prepared,
3239  * running, paused or suspended for the specified stream direction.
3240  */
3241 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
3242                 struct snd_soc_pcm_runtime *be, int stream)
3243 {
3244         struct snd_soc_dpcm *dpcm;
3245         int state;
3246
3247         for_each_dpcm_fe(be, stream, dpcm) {
3248
3249                 if (dpcm->fe == fe)
3250                         continue;
3251
3252                 state = dpcm->fe->dpcm[stream].state;
3253                 if (state == SND_SOC_DPCM_STATE_START ||
3254                         state == SND_SOC_DPCM_STATE_PAUSED ||
3255                         state == SND_SOC_DPCM_STATE_SUSPEND ||
3256                         state == SND_SOC_DPCM_STATE_PREPARE)
3257                         return 0;
3258         }
3259
3260         /* it's safe to change hw_params */
3261         return 1;
3262 }
3263 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
3264
3265 #ifdef CONFIG_DEBUG_FS
3266 static const char *dpcm_state_string(enum snd_soc_dpcm_state state)
3267 {
3268         switch (state) {
3269         case SND_SOC_DPCM_STATE_NEW:
3270                 return "new";
3271         case SND_SOC_DPCM_STATE_OPEN:
3272                 return "open";
3273         case SND_SOC_DPCM_STATE_HW_PARAMS:
3274                 return "hw_params";
3275         case SND_SOC_DPCM_STATE_PREPARE:
3276                 return "prepare";
3277         case SND_SOC_DPCM_STATE_START:
3278                 return "start";
3279         case SND_SOC_DPCM_STATE_STOP:
3280                 return "stop";
3281         case SND_SOC_DPCM_STATE_SUSPEND:
3282                 return "suspend";
3283         case SND_SOC_DPCM_STATE_PAUSED:
3284                 return "paused";
3285         case SND_SOC_DPCM_STATE_HW_FREE:
3286                 return "hw_free";
3287         case SND_SOC_DPCM_STATE_CLOSE:
3288                 return "close";
3289         }
3290
3291         return "unknown";
3292 }
3293
3294 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
3295                                 int stream, char *buf, size_t size)
3296 {
3297         struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
3298         struct snd_soc_dpcm *dpcm;
3299         ssize_t offset = 0;
3300
3301         /* FE state */
3302         offset += snprintf(buf + offset, size - offset,
3303                         "[%s - %s]\n", fe->dai_link->name,
3304                         stream ? "Capture" : "Playback");
3305
3306         offset += snprintf(buf + offset, size - offset, "State: %s\n",
3307                         dpcm_state_string(fe->dpcm[stream].state));
3308
3309         if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3310             (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3311                 offset += snprintf(buf + offset, size - offset,
3312                                 "Hardware Params: "
3313                                 "Format = %s, Channels = %d, Rate = %d\n",
3314                                 snd_pcm_format_name(params_format(params)),
3315                                 params_channels(params),
3316                                 params_rate(params));
3317
3318         /* BEs state */
3319         offset += snprintf(buf + offset, size - offset, "Backends:\n");
3320
3321         if (list_empty(&fe->dpcm[stream].be_clients)) {
3322                 offset += snprintf(buf + offset, size - offset,
3323                                 " No active DSP links\n");
3324                 goto out;
3325         }
3326
3327         for_each_dpcm_be(fe, stream, dpcm) {
3328                 struct snd_soc_pcm_runtime *be = dpcm->be;
3329                 params = &dpcm->hw_params;
3330
3331                 offset += snprintf(buf + offset, size - offset,
3332                                 "- %s\n", be->dai_link->name);
3333
3334                 offset += snprintf(buf + offset, size - offset,
3335                                 "   State: %s\n",
3336                                 dpcm_state_string(be->dpcm[stream].state));
3337
3338                 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3339                     (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3340                         offset += snprintf(buf + offset, size - offset,
3341                                 "   Hardware Params: "
3342                                 "Format = %s, Channels = %d, Rate = %d\n",
3343                                 snd_pcm_format_name(params_format(params)),
3344                                 params_channels(params),
3345                                 params_rate(params));
3346         }
3347
3348 out:
3349         return offset;
3350 }
3351
3352 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
3353                                 size_t count, loff_t *ppos)
3354 {
3355         struct snd_soc_pcm_runtime *fe = file->private_data;
3356         ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
3357         char *buf;
3358
3359         buf = kmalloc(out_count, GFP_KERNEL);
3360         if (!buf)
3361                 return -ENOMEM;
3362
3363         if (fe->cpu_dai->driver->playback.channels_min)
3364                 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
3365                                         buf + offset, out_count - offset);
3366
3367         if (fe->cpu_dai->driver->capture.channels_min)
3368                 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE,
3369                                         buf + offset, out_count - offset);
3370
3371         ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
3372
3373         kfree(buf);
3374         return ret;
3375 }
3376
3377 static const struct file_operations dpcm_state_fops = {
3378         .open = simple_open,
3379         .read = dpcm_state_read_file,
3380         .llseek = default_llseek,
3381 };
3382
3383 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
3384 {
3385         if (!rtd->dai_link)
3386                 return;
3387
3388         if (!rtd->card->debugfs_card_root)
3389                 return;
3390
3391         rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
3392                         rtd->card->debugfs_card_root);
3393         if (!rtd->debugfs_dpcm_root) {
3394                 dev_dbg(rtd->dev,
3395                          "ASoC: Failed to create dpcm debugfs directory %s\n",
3396                          rtd->dai_link->name);
3397                 return;
3398         }
3399
3400         debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root,
3401                             rtd, &dpcm_state_fops);
3402 }
3403 #endif