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                 snd_soc_dapm_update_dai(substream, &codec_params, codec_dai);
 974         }
 975
 976         ret = soc_dai_hw_params(substream, params, cpu_dai);
 977         if (ret < 0)
 978                 goto interface_err;
 979
 980         for_each_rtdcom(rtd, rtdcom) {
 981                 component = rtdcom->component;
 982
 983                 if (!component->driver->ops ||
 984                     !component->driver->ops->hw_params)
 985                         continue;
 986
 987                 ret = component->driver->ops->hw_params(substream, params);
 988                 if (ret < 0) {
 989                         dev_err(component->dev,
 990                                 "ASoC: %s hw params failed: %d\n",
 991                                 component->name, ret);
 992                         goto component_err;
 993                 }
 994         }
 995         component = NULL;
 996
 997         /* store the parameters for each DAIs */
 998         cpu_dai->rate = params_rate(params);
 999         cpu_dai->channels = params_channels(params);
1000         cpu_dai->sample_bits =
1001                 snd_pcm_format_physical_width(params_format(params));
1002
1003         snd_soc_dapm_update_dai(substream, params, cpu_dai);
1004
1005         ret = soc_pcm_params_symmetry(substream, params);
1006         if (ret)
1007                 goto component_err;
1008 out:
1009         mutex_unlock(&rtd->pcm_mutex);
1010         return ret;
1011
1012 component_err:
1013         soc_pcm_components_hw_free(substream, component);
1014
1015         if (cpu_dai->driver->ops->hw_free)
1016                 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
1017
1018 interface_err:
1019         i = rtd->num_codecs;
1020
1021 codec_err:
1022         for_each_rtd_codec_dai_rollback(rtd, i, codec_dai) {
1023                 if (codec_dai->driver->ops->hw_free)
1024                         codec_dai->driver->ops->hw_free(substream, codec_dai);
1025                 codec_dai->rate = 0;
1026         }
1027
1028         if (rtd->dai_link->ops->hw_free)
1029                 rtd->dai_link->ops->hw_free(substream);
1030
1031         mutex_unlock(&rtd->pcm_mutex);
1032         return ret;
1033 }
1034
1035 /*
1036  * Frees resources allocated by hw_params, can be called multiple times
1037  */
1038 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
1039 {
1040         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1041         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1042         struct snd_soc_dai *codec_dai;
1043         bool playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
1044         int i;
1045
1046         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
1047
1048         /* clear the corresponding DAIs parameters when going to be inactive */
1049         if (cpu_dai->active == 1) {
1050                 cpu_dai->rate = 0;
1051                 cpu_dai->channels = 0;
1052                 cpu_dai->sample_bits = 0;
1053         }
1054
1055         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1056                 if (codec_dai->active == 1) {
1057                         codec_dai->rate = 0;
1058                         codec_dai->channels = 0;
1059                         codec_dai->sample_bits = 0;
1060                 }
1061         }
1062
1063         /* apply codec digital mute */
1064         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1065                 if ((playback && codec_dai->playback_active == 1) ||
1066                     (!playback && codec_dai->capture_active == 1))
1067                         snd_soc_dai_digital_mute(codec_dai, 1,
1068                                                  substream->stream);
1069         }
1070
1071         /* free any machine hw params */
1072         if (rtd->dai_link->ops->hw_free)
1073                 rtd->dai_link->ops->hw_free(substream);
1074
1075         /* free any component resources */
1076         soc_pcm_components_hw_free(substream, NULL);
1077
1078         /* now free hw params for the DAIs  */
1079         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1080                 if (codec_dai->driver->ops->hw_free)
1081                         codec_dai->driver->ops->hw_free(substream, codec_dai);
1082         }
1083
1084         if (cpu_dai->driver->ops->hw_free)
1085                 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
1086
1087         mutex_unlock(&rtd->pcm_mutex);
1088         return 0;
1089 }
1090
1091 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
1092 {
1093         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1094         struct snd_soc_component *component;
1095         struct snd_soc_rtdcom_list *rtdcom;
1096         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1097         struct snd_soc_dai *codec_dai;
1098         int i, ret;
1099
1100         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1101                 if (codec_dai->driver->ops->trigger) {
1102                         ret = codec_dai->driver->ops->trigger(substream,
1103                                                               cmd, codec_dai);
1104                         if (ret < 0)
1105                                 return ret;
1106                 }
1107         }
1108
1109         for_each_rtdcom(rtd, rtdcom) {
1110                 component = rtdcom->component;
1111
1112                 if (!component->driver->ops ||
1113                     !component->driver->ops->trigger)
1114                         continue;
1115
1116                 ret = component->driver->ops->trigger(substream, cmd);
1117                 if (ret < 0)
1118                         return ret;
1119         }
1120
1121         if (cpu_dai->driver->ops->trigger) {
1122                 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
1123                 if (ret < 0)
1124                         return ret;
1125         }
1126
1127         if (rtd->dai_link->ops->trigger) {
1128                 ret = rtd->dai_link->ops->trigger(substream, cmd);
1129                 if (ret < 0)
1130                         return ret;
1131         }
1132
1133         return 0;
1134 }
1135
1136 static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
1137                                    int cmd)
1138 {
1139         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1140         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1141         struct snd_soc_dai *codec_dai;
1142         int i, ret;
1143
1144         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1145                 if (codec_dai->driver->ops->bespoke_trigger) {
1146                         ret = codec_dai->driver->ops->bespoke_trigger(substream,
1147                                                                 cmd, codec_dai);
1148                         if (ret < 0)
1149                                 return ret;
1150                 }
1151         }
1152
1153         if (cpu_dai->driver->ops->bespoke_trigger) {
1154                 ret = cpu_dai->driver->ops->bespoke_trigger(substream, cmd, cpu_dai);
1155                 if (ret < 0)
1156                         return ret;
1157         }
1158         return 0;
1159 }
1160 /*
1161  * soc level wrapper for pointer callback
1162  * If cpu_dai, codec_dai, component driver has the delay callback, then
1163  * the runtime->delay will be updated accordingly.
1164  */
1165 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1166 {
1167         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1168         struct snd_soc_component *component;
1169         struct snd_soc_rtdcom_list *rtdcom;
1170         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1171         struct snd_soc_dai *codec_dai;
1172         struct snd_pcm_runtime *runtime = substream->runtime;
1173         snd_pcm_uframes_t offset = 0;
1174         snd_pcm_sframes_t delay = 0;
1175         snd_pcm_sframes_t codec_delay = 0;
1176         int i;
1177
1178         /* clearing the previous total delay */
1179         runtime->delay = 0;
1180
1181         for_each_rtdcom(rtd, rtdcom) {
1182                 component = rtdcom->component;
1183
1184                 if (!component->driver->ops ||
1185                     !component->driver->ops->pointer)
1186                         continue;
1187
1188                 /* FIXME: use 1st pointer */
1189                 offset = component->driver->ops->pointer(substream);
1190                 break;
1191         }
1192         /* base delay if assigned in pointer callback */
1193         delay = runtime->delay;
1194
1195         if (cpu_dai->driver->ops->delay)
1196                 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
1197
1198         for_each_rtd_codec_dai(rtd, i, codec_dai) {
1199                 if (codec_dai->driver->ops->delay)
1200                         codec_delay = max(codec_delay,
1201                                         codec_dai->driver->ops->delay(substream,
1202                                                                     codec_dai));
1203         }
1204         delay += codec_delay;
1205
1206         runtime->delay = delay;
1207
1208         return offset;
1209 }
1210
1211 /* connect a FE and BE */
1212 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1213                 struct snd_soc_pcm_runtime *be, int stream)
1214 {
1215         struct snd_soc_dpcm *dpcm;
1216
1217         /* only add new dpcms */
1218         for_each_dpcm_be(fe, stream, dpcm) {
1219                 if (dpcm->be == be && dpcm->fe == fe)
1220                         return 0;
1221         }
1222
1223         dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1224         if (!dpcm)
1225                 return -ENOMEM;
1226
1227         dpcm->be = be;
1228         dpcm->fe = fe;
1229         be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
1230         dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1231         list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1232         list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1233
1234         dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1235                         stream ? "capture" : "playback",  fe->dai_link->name,
1236                         stream ? "<-" : "->", be->dai_link->name);
1237
1238 #ifdef CONFIG_DEBUG_FS
1239         if (fe->debugfs_dpcm_root)
1240                 dpcm->debugfs_state = debugfs_create_u32(be->dai_link->name, 0644,
1241                                 fe->debugfs_dpcm_root, &dpcm->state);
1242 #endif
1243         return 1;
1244 }
1245
1246 /* reparent a BE onto another FE */
1247 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1248                         struct snd_soc_pcm_runtime *be, int stream)
1249 {
1250         struct snd_soc_dpcm *dpcm;
1251         struct snd_pcm_substream *fe_substream, *be_substream;
1252
1253         /* reparent if BE is connected to other FEs */
1254         if (!be->dpcm[stream].users)
1255                 return;
1256
1257         be_substream = snd_soc_dpcm_get_substream(be, stream);
1258
1259         for_each_dpcm_fe(be, stream, dpcm) {
1260                 if (dpcm->fe == fe)
1261                         continue;
1262
1263                 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1264                         stream ? "capture" : "playback",
1265                         dpcm->fe->dai_link->name,
1266                         stream ? "<-" : "->", dpcm->be->dai_link->name);
1267
1268                 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1269                 be_substream->runtime = fe_substream->runtime;
1270                 break;
1271         }
1272 }
1273
1274 /* disconnect a BE and FE */
1275 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1276 {
1277         struct snd_soc_dpcm *dpcm, *d;
1278
1279         for_each_dpcm_be_safe(fe, stream, dpcm, d) {
1280                 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1281                                 stream ? "capture" : "playback",
1282                                 dpcm->be->dai_link->name);
1283
1284                 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1285                         continue;
1286
1287                 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1288                         stream ? "capture" : "playback", fe->dai_link->name,
1289                         stream ? "<-" : "->", dpcm->be->dai_link->name);
1290
1291                 /* BEs still alive need new FE */
1292                 dpcm_be_reparent(fe, dpcm->be, stream);
1293
1294 #ifdef CONFIG_DEBUG_FS
1295                 debugfs_remove(dpcm->debugfs_state);
1296 #endif
1297                 list_del(&dpcm->list_be);
1298                 list_del(&dpcm->list_fe);
1299                 kfree(dpcm);
1300         }
1301 }
1302
1303 /* get BE for DAI widget and stream */
1304 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1305                 struct snd_soc_dapm_widget *widget, int stream)
1306 {
1307         struct snd_soc_pcm_runtime *be;
1308         struct snd_soc_dai *dai;
1309         int i;
1310
1311         dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name);
1312
1313         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1314                 for_each_card_rtds(card, be) {
1315
1316                         if (!be->dai_link->no_pcm)
1317                                 continue;
1318
1319                         dev_dbg(card->dev, "ASoC: try BE : %s\n",
1320                                 be->cpu_dai->playback_widget ?
1321                                 be->cpu_dai->playback_widget->name : "(not set)");
1322
1323                         if (be->cpu_dai->playback_widget == widget)
1324                                 return be;
1325
1326                         for_each_rtd_codec_dai(be, i, dai) {
1327                                 if (dai->playback_widget == widget)
1328                                         return be;
1329                         }
1330                 }
1331         } else {
1332
1333                 for_each_card_rtds(card, be) {
1334
1335                         if (!be->dai_link->no_pcm)
1336                                 continue;
1337
1338                         dev_dbg(card->dev, "ASoC: try BE %s\n",
1339                                 be->cpu_dai->capture_widget ?
1340                                 be->cpu_dai->capture_widget->name : "(not set)");
1341
1342                         if (be->cpu_dai->capture_widget == widget)
1343                                 return be;
1344
1345                         for_each_rtd_codec_dai(be, i, dai) {
1346                                 if (dai->capture_widget == widget)
1347                                         return be;
1348                         }
1349                 }
1350         }
1351
1352         /* dai link name and stream name set correctly ? */
1353         dev_err(card->dev, "ASoC: can't get %s BE for %s\n",
1354                 stream ? "capture" : "playback", widget->name);
1355         return NULL;
1356 }
1357
1358 static inline struct snd_soc_dapm_widget *
1359         dai_get_widget(struct snd_soc_dai *dai, int stream)
1360 {
1361         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1362                 return dai->playback_widget;
1363         else
1364                 return dai->capture_widget;
1365 }
1366
1367 static int widget_in_list(struct snd_soc_dapm_widget_list *list,
1368                 struct snd_soc_dapm_widget *widget)
1369 {
1370         int i;
1371
1372         for (i = 0; i < list->num_widgets; i++) {
1373                 if (widget == list->widgets[i])
1374                         return 1;
1375         }
1376
1377         return 0;
1378 }
1379
1380 static bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget,
1381                 enum snd_soc_dapm_direction dir)
1382 {
1383         struct snd_soc_card *card = widget->dapm->card;
1384         struct snd_soc_pcm_runtime *rtd;
1385         struct snd_soc_dai *dai;
1386         int i;
1387
1388         if (dir == SND_SOC_DAPM_DIR_OUT) {
1389                 for_each_card_rtds(card, rtd) {
1390                         if (!rtd->dai_link->no_pcm)
1391                                 continue;
1392
1393                         if (rtd->cpu_dai->playback_widget == widget)
1394                                 return true;
1395
1396                         for_each_rtd_codec_dai(rtd, i, dai) {
1397                                 if (dai->playback_widget == widget)
1398                                         return true;
1399                         }
1400                 }
1401         } else { /* SND_SOC_DAPM_DIR_IN */
1402                 for_each_card_rtds(card, rtd) {
1403                         if (!rtd->dai_link->no_pcm)
1404                                 continue;
1405
1406                         if (rtd->cpu_dai->capture_widget == widget)
1407                                 return true;
1408
1409                         for_each_rtd_codec_dai(rtd, i, dai) {
1410                                 if (dai->capture_widget == widget)
1411                                         return true;
1412                         }
1413                 }
1414         }
1415
1416         return false;
1417 }
1418
1419 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1420         int stream, struct snd_soc_dapm_widget_list **list)
1421 {
1422         struct snd_soc_dai *cpu_dai = fe->cpu_dai;
1423         int paths;
1424
1425         /* get number of valid DAI paths and their widgets */
1426         paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
1427                         dpcm_end_walk_at_be);
1428
1429         dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1430                         stream ? "capture" : "playback");
1431
1432         return paths;
1433 }
1434
1435 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1436         struct snd_soc_dapm_widget_list **list_)
1437 {
1438         struct snd_soc_dpcm *dpcm;
1439         struct snd_soc_dapm_widget_list *list = *list_;
1440         struct snd_soc_dapm_widget *widget;
1441         struct snd_soc_dai *dai;
1442         int prune = 0;
1443
1444         /* Destroy any old FE <--> BE connections */
1445         for_each_dpcm_be(fe, stream, dpcm) {
1446                 unsigned int i;
1447
1448                 /* is there a valid CPU DAI widget for this BE */
1449                 widget = dai_get_widget(dpcm->be->cpu_dai, stream);
1450
1451                 /* prune the BE if it's no longer in our active list */
1452                 if (widget && widget_in_list(list, widget))
1453                         continue;
1454
1455                 /* is there a valid CODEC DAI widget for this BE */
1456                 for_each_rtd_codec_dai(dpcm->be, i, dai) {
1457                         widget = dai_get_widget(dai, stream);
1458
1459                         /* prune the BE if it's no longer in our active list */
1460                         if (widget && widget_in_list(list, widget))
1461                                 continue;
1462                 }
1463
1464                 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1465                         stream ? "capture" : "playback",
1466                         dpcm->be->dai_link->name, fe->dai_link->name);
1467                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1468                 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1469                 prune++;
1470         }
1471
1472         dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1473         return prune;
1474 }
1475
1476 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1477         struct snd_soc_dapm_widget_list **list_)
1478 {
1479         struct snd_soc_card *card = fe->card;
1480         struct snd_soc_dapm_widget_list *list = *list_;
1481         struct snd_soc_pcm_runtime *be;
1482         int i, new = 0, err;
1483
1484         /* Create any new FE <--> BE connections */
1485         for (i = 0; i < list->num_widgets; i++) {
1486
1487                 switch (list->widgets[i]->id) {
1488                 case snd_soc_dapm_dai_in:
1489                         if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1490                                 continue;
1491                         break;
1492                 case snd_soc_dapm_dai_out:
1493                         if (stream != SNDRV_PCM_STREAM_CAPTURE)
1494                                 continue;
1495                         break;
1496                 default:
1497                         continue;
1498                 }
1499
1500                 /* is there a valid BE rtd for this widget */
1501                 be = dpcm_get_be(card, list->widgets[i], stream);
1502                 if (!be) {
1503                         dev_err(fe->dev, "ASoC: no BE found for %s\n",
1504                                         list->widgets[i]->name);
1505                         continue;
1506                 }
1507
1508                 /* make sure BE is a real BE */
1509                 if (!be->dai_link->no_pcm)
1510                         continue;
1511
1512                 /* don't connect if FE is not running */
1513                 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
1514                         continue;
1515
1516                 /* newly connected FE and BE */
1517                 err = dpcm_be_connect(fe, be, stream);
1518                 if (err < 0) {
1519                         dev_err(fe->dev, "ASoC: can't connect %s\n",
1520                                 list->widgets[i]->name);
1521                         break;
1522                 } else if (err == 0) /* already connected */
1523                         continue;
1524
1525                 /* new */
1526                 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1527                 new++;
1528         }
1529
1530         dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1531         return new;
1532 }
1533
1534 /*
1535  * Find the corresponding BE DAIs that source or sink audio to this
1536  * FE substream.
1537  */
1538 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1539         int stream, struct snd_soc_dapm_widget_list **list, int new)
1540 {
1541         if (new)
1542                 return dpcm_add_paths(fe, stream, list);
1543         else
1544                 return dpcm_prune_paths(fe, stream, list);
1545 }
1546
1547 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1548 {
1549         struct snd_soc_dpcm *dpcm;
1550
1551         for_each_dpcm_be(fe, stream, dpcm)
1552                 dpcm->be->dpcm[stream].runtime_update =
1553                                                 SND_SOC_DPCM_UPDATE_NO;
1554 }
1555
1556 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
1557         int stream)
1558 {
1559         struct snd_soc_dpcm *dpcm;
1560
1561         /* disable any enabled and non active backends */
1562         for_each_dpcm_be(fe, stream, dpcm) {
1563
1564                 struct snd_soc_pcm_runtime *be = dpcm->be;
1565                 struct snd_pcm_substream *be_substream =
1566                         snd_soc_dpcm_get_substream(be, stream);
1567
1568                 if (be->dpcm[stream].users == 0)
1569                         dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1570                                 stream ? "capture" : "playback",
1571                                 be->dpcm[stream].state);
1572
1573                 if (--be->dpcm[stream].users != 0)
1574                         continue;
1575
1576                 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1577                         continue;
1578
1579                 soc_pcm_close(be_substream);
1580                 be_substream->runtime = NULL;
1581                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1582         }
1583 }
1584
1585 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1586 {
1587         struct snd_soc_dpcm *dpcm;
1588         int err, count = 0;
1589
1590         /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1591         for_each_dpcm_be(fe, stream, dpcm) {
1592
1593                 struct snd_soc_pcm_runtime *be = dpcm->be;
1594                 struct snd_pcm_substream *be_substream =
1595                         snd_soc_dpcm_get_substream(be, stream);
1596
1597                 if (!be_substream) {
1598                         dev_err(be->dev, "ASoC: no backend %s stream\n",
1599                                 stream ? "capture" : "playback");
1600                         continue;
1601                 }
1602
1603                 /* is this op for this BE ? */
1604                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1605                         continue;
1606
1607                 /* first time the dpcm is open ? */
1608                 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
1609                         dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1610                                 stream ? "capture" : "playback",
1611                                 be->dpcm[stream].state);
1612
1613                 if (be->dpcm[stream].users++ != 0)
1614                         continue;
1615
1616                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1617                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1618                         continue;
1619
1620                 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1621                         stream ? "capture" : "playback", be->dai_link->name);
1622
1623                 be_substream->runtime = be->dpcm[stream].runtime;
1624                 err = soc_pcm_open(be_substream);
1625                 if (err < 0) {
1626                         dev_err(be->dev, "ASoC: BE open failed %d\n", err);
1627                         be->dpcm[stream].users--;
1628                         if (be->dpcm[stream].users < 0)
1629                                 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1630                                         stream ? "capture" : "playback",
1631                                         be->dpcm[stream].state);
1632
1633                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1634                         goto unwind;
1635                 }
1636
1637                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1638                 count++;
1639         }
1640
1641         return count;
1642
1643 unwind:
1644         /* disable any enabled and non active backends */
1645         for_each_dpcm_be_rollback(fe, stream, dpcm) {
1646                 struct snd_soc_pcm_runtime *be = dpcm->be;
1647                 struct snd_pcm_substream *be_substream =
1648                         snd_soc_dpcm_get_substream(be, stream);
1649
1650                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1651                         continue;
1652
1653                 if (be->dpcm[stream].users == 0)
1654                         dev_err(be->dev, "ASoC: no users %s at close %d\n",
1655                                 stream ? "capture" : "playback",
1656                                 be->dpcm[stream].state);
1657
1658                 if (--be->dpcm[stream].users != 0)
1659                         continue;
1660
1661                 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1662                         continue;
1663
1664                 soc_pcm_close(be_substream);
1665                 be_substream->runtime = NULL;
1666                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1667         }
1668
1669         return err;
1670 }
1671
1672 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
1673                                  struct snd_soc_pcm_stream *stream)
1674 {
1675         runtime->hw.rate_min = stream->rate_min;
1676         runtime->hw.rate_max = min_not_zero(stream->rate_max, UINT_MAX);
1677         runtime->hw.channels_min = stream->channels_min;
1678         runtime->hw.channels_max = stream->channels_max;
1679         if (runtime->hw.formats)
1680                 runtime->hw.formats &= stream->formats;
1681         else
1682                 runtime->hw.formats = stream->formats;
1683         runtime->hw.rates = stream->rates;
1684 }
1685
1686 static void dpcm_runtime_merge_format(struct snd_pcm_substream *substream,
1687                                       u64 *formats)
1688 {
1689         struct snd_soc_pcm_runtime *fe = substream->private_data;
1690         struct snd_soc_dpcm *dpcm;
1691         struct snd_soc_dai *dai;
1692         int stream = substream->stream;
1693
1694         if (!fe->dai_link->dpcm_merged_format)
1695                 return;
1696
1697         /*
1698          * It returns merged BE codec format
1699          * if FE want to use it (= dpcm_merged_format)
1700          */
1701
1702         for_each_dpcm_be(fe, stream, dpcm) {
1703                 struct snd_soc_pcm_runtime *be = dpcm->be;
1704                 struct snd_soc_dai_driver *codec_dai_drv;
1705                 struct snd_soc_pcm_stream *codec_stream;
1706                 int i;
1707
1708                 for_each_rtd_codec_dai(be, i, dai) {
1709                         /*
1710                          * Skip CODECs which don't support the current stream
1711                          * type. See soc_pcm_init_runtime_hw() for more details
1712                          */
1713                         if (!snd_soc_dai_stream_valid(dai, stream))
1714                                 continue;
1715
1716                         codec_dai_drv = dai->driver;
1717                         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1718                                 codec_stream = &codec_dai_drv->playback;
1719                         else
1720                                 codec_stream = &codec_dai_drv->capture;
1721
1722                         *formats &= codec_stream->formats;
1723                 }
1724         }
1725 }
1726
1727 static void dpcm_runtime_merge_chan(struct snd_pcm_substream *substream,
1728                                     unsigned int *channels_min,
1729                                     unsigned int *channels_max)
1730 {
1731         struct snd_soc_pcm_runtime *fe = substream->private_data;
1732         struct snd_soc_dpcm *dpcm;
1733         int stream = substream->stream;
1734
1735         if (!fe->dai_link->dpcm_merged_chan)
1736                 return;
1737
1738         /*
1739          * It returns merged BE codec channel;
1740          * if FE want to use it (= dpcm_merged_chan)
1741          */
1742
1743         for_each_dpcm_be(fe, stream, dpcm) {
1744                 struct snd_soc_pcm_runtime *be = dpcm->be;
1745                 struct snd_soc_dai_driver *cpu_dai_drv =  be->cpu_dai->driver;
1746                 struct snd_soc_dai_driver *codec_dai_drv;
1747                 struct snd_soc_pcm_stream *codec_stream;
1748                 struct snd_soc_pcm_stream *cpu_stream;
1749
1750                 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1751                         cpu_stream = &cpu_dai_drv->playback;
1752                 else
1753                         cpu_stream = &cpu_dai_drv->capture;
1754
1755                 *channels_min = max(*channels_min, cpu_stream->channels_min);
1756                 *channels_max = min(*channels_max, cpu_stream->channels_max);
1757
1758                 /*
1759                  * chan min/max cannot be enforced if there are multiple CODEC
1760                  * DAIs connected to a single CPU DAI, use CPU DAI's directly
1761                  */
1762                 if (be->num_codecs == 1) {
1763                         codec_dai_drv = be->codec_dais[0]->driver;
1764
1765                         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1766                                 codec_stream = &codec_dai_drv->playback;
1767                         else
1768                                 codec_stream = &codec_dai_drv->capture;
1769
1770                         *channels_min = max(*channels_min,
1771                                             codec_stream->channels_min);
1772                         *channels_max = min(*channels_max,
1773                                             codec_stream->channels_max);
1774                 }
1775         }
1776 }
1777
1778 static void dpcm_runtime_merge_rate(struct snd_pcm_substream *substream,
1779                                     unsigned int *rates,
1780                                     unsigned int *rate_min,
1781                                     unsigned int *rate_max)
1782 {
1783         struct snd_soc_pcm_runtime *fe = substream->private_data;
1784         struct snd_soc_dpcm *dpcm;
1785         int stream = substream->stream;
1786
1787         if (!fe->dai_link->dpcm_merged_rate)
1788                 return;
1789
1790         /*
1791          * It returns merged BE codec channel;
1792          * if FE want to use it (= dpcm_merged_chan)
1793          */
1794
1795         for_each_dpcm_be(fe, stream, dpcm) {
1796                 struct snd_soc_pcm_runtime *be = dpcm->be;
1797                 struct snd_soc_dai_driver *cpu_dai_drv =  be->cpu_dai->driver;
1798                 struct snd_soc_dai_driver *codec_dai_drv;
1799                 struct snd_soc_pcm_stream *codec_stream;
1800                 struct snd_soc_pcm_stream *cpu_stream;
1801                 struct snd_soc_dai *dai;
1802                 int i;
1803
1804                 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1805                         cpu_stream = &cpu_dai_drv->playback;
1806                 else
1807                         cpu_stream = &cpu_dai_drv->capture;
1808
1809                 *rate_min = max(*rate_min, cpu_stream->rate_min);
1810                 *rate_max = min_not_zero(*rate_max, cpu_stream->rate_max);
1811                 *rates = snd_pcm_rate_mask_intersect(*rates, cpu_stream->rates);
1812
1813                 for_each_rtd_codec_dai(be, i, dai) {
1814                         /*
1815                          * Skip CODECs which don't support the current stream
1816                          * type. See soc_pcm_init_runtime_hw() for more details
1817                          */
1818                         if (!snd_soc_dai_stream_valid(dai, stream))
1819                                 continue;
1820
1821                         codec_dai_drv = dai->driver;
1822                         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1823                                 codec_stream = &codec_dai_drv->playback;
1824                         else
1825                                 codec_stream = &codec_dai_drv->capture;
1826
1827                         *rate_min = max(*rate_min, codec_stream->rate_min);
1828                         *rate_max = min_not_zero(*rate_max,
1829                                                  codec_stream->rate_max);
1830                         *rates = snd_pcm_rate_mask_intersect(*rates,
1831                                                 codec_stream->rates);
1832                 }
1833         }
1834 }
1835
1836 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
1837 {
1838         struct snd_pcm_runtime *runtime = substream->runtime;
1839         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1840         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1841         struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
1842
1843         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1844                 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback);
1845         else
1846                 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture);
1847
1848         dpcm_runtime_merge_format(substream, &runtime->hw.formats);
1849         dpcm_runtime_merge_chan(substream, &runtime->hw.channels_min,
1850                                 &runtime->hw.channels_max);
1851         dpcm_runtime_merge_rate(substream, &runtime->hw.rates,
1852                                 &runtime->hw.rate_min, &runtime->hw.rate_max);
1853 }
1854
1855 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
1856
1857 /* Set FE's runtime_update state; the state is protected via PCM stream lock
1858  * for avoiding the race with trigger callback.
1859  * If the state is unset and a trigger is pending while the previous operation,
1860  * process the pending trigger action here.
1861  */
1862 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
1863                                      int stream, enum snd_soc_dpcm_update state)
1864 {
1865         struct snd_pcm_substream *substream =
1866                 snd_soc_dpcm_get_substream(fe, stream);
1867
1868         snd_pcm_stream_lock_irq(substream);
1869         if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
1870                 dpcm_fe_dai_do_trigger(substream,
1871                                        fe->dpcm[stream].trigger_pending - 1);
1872                 fe->dpcm[stream].trigger_pending = 0;
1873         }
1874         fe->dpcm[stream].runtime_update = state;
1875         snd_pcm_stream_unlock_irq(substream);
1876 }
1877
1878 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
1879                                int stream)
1880 {
1881         struct snd_soc_dpcm *dpcm;
1882         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1883         struct snd_soc_dai *fe_cpu_dai = fe->cpu_dai;
1884         int err;
1885
1886         /* apply symmetry for FE */
1887         if (soc_pcm_has_symmetry(fe_substream))
1888                 fe_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1889
1890         /* Symmetry only applies if we've got an active stream. */
1891         if (fe_cpu_dai->active) {
1892                 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
1893                 if (err < 0)
1894                         return err;
1895         }
1896
1897         /* apply symmetry for BE */
1898         for_each_dpcm_be(fe, stream, dpcm) {
1899                 struct snd_soc_pcm_runtime *be = dpcm->be;
1900                 struct snd_pcm_substream *be_substream =
1901                         snd_soc_dpcm_get_substream(be, stream);
1902                 struct snd_soc_pcm_runtime *rtd = be_substream->private_data;
1903                 struct snd_soc_dai *codec_dai;
1904                 int i;
1905
1906                 if (rtd->dai_link->be_hw_params_fixup)
1907                         continue;
1908
1909                 if (soc_pcm_has_symmetry(be_substream))
1910                         be_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1911
1912                 /* Symmetry only applies if we've got an active stream. */
1913                 if (rtd->cpu_dai->active) {
1914                         err = soc_pcm_apply_symmetry(fe_substream,
1915                                                      rtd->cpu_dai);
1916                         if (err < 0)
1917                                 return err;
1918                 }
1919
1920                 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1921                         if (codec_dai->active) {
1922                                 err = soc_pcm_apply_symmetry(fe_substream,
1923                                                              codec_dai);
1924                                 if (err < 0)
1925                                         return err;
1926                         }
1927                 }
1928         }
1929
1930         return 0;
1931 }
1932
1933 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1934 {
1935         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1936         struct snd_pcm_runtime *runtime = fe_substream->runtime;
1937         int stream = fe_substream->stream, ret = 0;
1938
1939         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1940
1941         ret = dpcm_be_dai_startup(fe, fe_substream->stream);
1942         if (ret < 0) {
1943                 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
1944                 goto be_err;
1945         }
1946
1947         dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1948
1949         /* start the DAI frontend */
1950         ret = soc_pcm_open(fe_substream);
1951         if (ret < 0) {
1952                 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
1953                 goto unwind;
1954         }
1955
1956         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1957
1958         dpcm_set_fe_runtime(fe_substream);
1959         snd_pcm_limit_hw_rates(runtime);
1960
1961         ret = dpcm_apply_symmetry(fe_substream, stream);
1962         if (ret < 0) {
1963                 dev_err(fe->dev, "ASoC: failed to apply dpcm symmetry %d\n",
1964                         ret);
1965                 goto unwind;
1966         }
1967
1968         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1969         return 0;
1970
1971 unwind:
1972         dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
1973 be_err:
1974         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1975         return ret;
1976 }
1977
1978 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1979 {
1980         struct snd_soc_dpcm *dpcm;
1981
1982         /* only shutdown BEs that are either sinks or sources to this FE DAI */
1983         for_each_dpcm_be(fe, stream, dpcm) {
1984
1985                 struct snd_soc_pcm_runtime *be = dpcm->be;
1986                 struct snd_pcm_substream *be_substream =
1987                         snd_soc_dpcm_get_substream(be, stream);
1988
1989                 /* is this op for this BE ? */
1990                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1991                         continue;
1992
1993                 if (be->dpcm[stream].users == 0)
1994                         dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1995                                 stream ? "capture" : "playback",
1996                                 be->dpcm[stream].state);
1997
1998                 if (--be->dpcm[stream].users != 0)
1999                         continue;
2000
2001                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2002                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)) {
2003                         soc_pcm_hw_free(be_substream);
2004                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2005                 }
2006
2007                 dev_dbg(be->dev, "ASoC: close BE %s\n",
2008                         be->dai_link->name);
2009
2010                 soc_pcm_close(be_substream);
2011                 be_substream->runtime = NULL;
2012
2013                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
2014         }
2015         return 0;
2016 }
2017
2018 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
2019 {
2020         struct snd_soc_pcm_runtime *fe = substream->private_data;
2021         int stream = substream->stream;
2022
2023         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2024
2025         /* shutdown the BEs */
2026         dpcm_be_dai_shutdown(fe, substream->stream);
2027
2028         dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
2029
2030         /* now shutdown the frontend */
2031         soc_pcm_close(substream);
2032
2033         /* run the stream event for each BE */
2034         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
2035
2036         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
2037         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2038         return 0;
2039 }
2040
2041 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
2042 {
2043         struct snd_soc_dpcm *dpcm;
2044
2045         /* only hw_params backends that are either sinks or sources
2046          * to this frontend DAI */
2047         for_each_dpcm_be(fe, stream, dpcm) {
2048
2049                 struct snd_soc_pcm_runtime *be = dpcm->be;
2050                 struct snd_pcm_substream *be_substream =
2051                         snd_soc_dpcm_get_substream(be, stream);
2052
2053                 /* is this op for this BE ? */
2054                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2055                         continue;
2056
2057                 /* only free hw when no longer used - check all FEs */
2058                 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2059                                 continue;
2060
2061                 /* do not free hw if this BE is used by other FE */
2062                 if (be->dpcm[stream].users > 1)
2063                         continue;
2064
2065                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2066                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2067                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2068                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
2069                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2070                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2071                         continue;
2072
2073                 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
2074                         be->dai_link->name);
2075
2076                 soc_pcm_hw_free(be_substream);
2077
2078                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2079         }
2080
2081         return 0;
2082 }
2083
2084 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
2085 {
2086         struct snd_soc_pcm_runtime *fe = substream->private_data;
2087         int err, stream = substream->stream;
2088
2089         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2090         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2091
2092         dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
2093
2094         /* call hw_free on the frontend */
2095         err = soc_pcm_hw_free(substream);
2096         if (err < 0)
2097                 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
2098                         fe->dai_link->name);
2099
2100         /* only hw_params backends that are either sinks or sources
2101          * to this frontend DAI */
2102         err = dpcm_be_dai_hw_free(fe, stream);
2103
2104         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2105         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2106
2107         mutex_unlock(&fe->card->mutex);
2108         return 0;
2109 }
2110
2111 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
2112 {
2113         struct snd_soc_dpcm *dpcm;
2114         int ret;
2115
2116         for_each_dpcm_be(fe, stream, dpcm) {
2117
2118                 struct snd_soc_pcm_runtime *be = dpcm->be;
2119                 struct snd_pcm_substream *be_substream =
2120                         snd_soc_dpcm_get_substream(be, stream);
2121
2122                 /* is this op for this BE ? */
2123                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2124                         continue;
2125
2126                 /* copy params for each dpcm */
2127                 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
2128                                 sizeof(struct snd_pcm_hw_params));
2129
2130                 /* perform any hw_params fixups */
2131                 if (be->dai_link->be_hw_params_fixup) {
2132                         ret = be->dai_link->be_hw_params_fixup(be,
2133                                         &dpcm->hw_params);
2134                         if (ret < 0) {
2135                                 dev_err(be->dev,
2136                                         "ASoC: hw_params BE fixup failed %d\n",
2137                                         ret);
2138                                 goto unwind;
2139                         }
2140                 }
2141
2142                 /* only allow hw_params() if no connected FEs are running */
2143                 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
2144                         continue;
2145
2146                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2147                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2148                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
2149                         continue;
2150
2151                 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
2152                         be->dai_link->name);
2153
2154                 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
2155                 if (ret < 0) {
2156                         dev_err(dpcm->be->dev,
2157                                 "ASoC: hw_params BE failed %d\n", ret);
2158                         goto unwind;
2159                 }
2160
2161                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2162         }
2163         return 0;
2164
2165 unwind:
2166         /* disable any enabled and non active backends */
2167         for_each_dpcm_be_rollback(fe, stream, dpcm) {
2168                 struct snd_soc_pcm_runtime *be = dpcm->be;
2169                 struct snd_pcm_substream *be_substream =
2170                         snd_soc_dpcm_get_substream(be, stream);
2171
2172                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2173                         continue;
2174
2175                 /* only allow hw_free() if no connected FEs are running */
2176                 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2177                         continue;
2178
2179                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2180                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2181                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2182                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2183                         continue;
2184
2185                 soc_pcm_hw_free(be_substream);
2186         }
2187
2188         return ret;
2189 }
2190
2191 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
2192                                  struct snd_pcm_hw_params *params)
2193 {
2194         struct snd_soc_pcm_runtime *fe = substream->private_data;
2195         int ret, stream = substream->stream;
2196
2197         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2198         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2199
2200         memcpy(&fe->dpcm[substream->stream].hw_params, params,
2201                         sizeof(struct snd_pcm_hw_params));
2202         ret = dpcm_be_dai_hw_params(fe, substream->stream);
2203         if (ret < 0) {
2204                 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
2205                 goto out;
2206         }
2207
2208         dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
2209                         fe->dai_link->name, params_rate(params),
2210                         params_channels(params), params_format(params));
2211
2212         /* call hw_params on the frontend */
2213         ret = soc_pcm_hw_params(substream, params);
2214         if (ret < 0) {
2215                 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
2216                 dpcm_be_dai_hw_free(fe, stream);
2217          } else
2218                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2219
2220 out:
2221         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2222         mutex_unlock(&fe->card->mutex);
2223         return ret;
2224 }
2225
2226 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
2227                 struct snd_pcm_substream *substream, int cmd)
2228 {
2229         int ret;
2230
2231         dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n",
2232                         dpcm->be->dai_link->name, cmd);
2233
2234         ret = soc_pcm_trigger(substream, cmd);
2235         if (ret < 0)
2236                 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret);
2237
2238         return ret;
2239 }
2240
2241 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
2242                                int cmd)
2243 {
2244         struct snd_soc_dpcm *dpcm;
2245         int ret = 0;
2246
2247         for_each_dpcm_be(fe, stream, dpcm) {
2248
2249                 struct snd_soc_pcm_runtime *be = dpcm->be;
2250                 struct snd_pcm_substream *be_substream =
2251                         snd_soc_dpcm_get_substream(be, stream);
2252
2253                 /* is this op for this BE ? */
2254                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2255                         continue;
2256
2257                 switch (cmd) {
2258                 case SNDRV_PCM_TRIGGER_START:
2259                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2260                             (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2261                                 continue;
2262
2263                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2264                         if (ret)
2265                                 return ret;
2266
2267                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2268                         break;
2269                 case SNDRV_PCM_TRIGGER_RESUME:
2270                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2271                                 continue;
2272
2273                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2274                         if (ret)
2275                                 return ret;
2276
2277                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2278                         break;
2279                 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2280                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2281                                 continue;
2282
2283                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2284                         if (ret)
2285                                 return ret;
2286
2287                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2288                         break;
2289                 case SNDRV_PCM_TRIGGER_STOP:
2290                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2291                                 continue;
2292
2293                         if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2294                                 continue;
2295
2296                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2297                         if (ret)
2298                                 return ret;
2299
2300                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2301                         break;
2302                 case SNDRV_PCM_TRIGGER_SUSPEND:
2303                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2304                                 continue;
2305
2306                         if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2307                                 continue;
2308
2309                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2310                         if (ret)
2311                                 return ret;
2312
2313                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
2314                         break;
2315                 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2316                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2317                                 continue;
2318
2319                         if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2320                                 continue;
2321
2322                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2323                         if (ret)
2324                                 return ret;
2325
2326                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2327                         break;
2328                 }
2329         }
2330
2331         return ret;
2332 }
2333 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2334
2335 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
2336 {
2337         struct snd_soc_pcm_runtime *fe = substream->private_data;
2338         int stream = substream->stream, ret;
2339         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2340
2341         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2342
2343         switch (trigger) {
2344         case SND_SOC_DPCM_TRIGGER_PRE:
2345                 /* call trigger on the frontend before the backend. */
2346
2347                 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2348                                 fe->dai_link->name, cmd);
2349
2350                 ret = soc_pcm_trigger(substream, cmd);
2351                 if (ret < 0) {
2352                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2353                         goto out;
2354                 }
2355
2356                 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2357                 break;
2358         case SND_SOC_DPCM_TRIGGER_POST:
2359                 /* call trigger on the frontend after the backend. */
2360
2361                 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2362                 if (ret < 0) {
2363                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2364                         goto out;
2365                 }
2366
2367                 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2368                                 fe->dai_link->name, cmd);
2369
2370                 ret = soc_pcm_trigger(substream, cmd);
2371                 break;
2372         case SND_SOC_DPCM_TRIGGER_BESPOKE:
2373                 /* bespoke trigger() - handles both FE and BEs */
2374
2375                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
2376                                 fe->dai_link->name, cmd);
2377
2378                 ret = soc_pcm_bespoke_trigger(substream, cmd);
2379                 if (ret < 0) {
2380                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2381                         goto out;
2382                 }
2383                 break;
2384         default:
2385                 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
2386                                 fe->dai_link->name);
2387                 ret = -EINVAL;
2388                 goto out;
2389         }
2390
2391         switch (cmd) {
2392         case SNDRV_PCM_TRIGGER_START:
2393         case SNDRV_PCM_TRIGGER_RESUME:
2394         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2395                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2396                 break;
2397         case SNDRV_PCM_TRIGGER_STOP:
2398         case SNDRV_PCM_TRIGGER_SUSPEND:
2399                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2400                 break;
2401         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2402                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2403                 break;
2404         }
2405
2406 out:
2407         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2408         return ret;
2409 }
2410
2411 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2412 {
2413         struct snd_soc_pcm_runtime *fe = substream->private_data;
2414         int stream = substream->stream;
2415
2416         /* if FE's runtime_update is already set, we're in race;
2417          * process this trigger later at exit
2418          */
2419         if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2420                 fe->dpcm[stream].trigger_pending = cmd + 1;
2421                 return 0; /* delayed, assuming it's successful */
2422         }
2423
2424         /* we're alone, let's trigger */
2425         return dpcm_fe_dai_do_trigger(substream, cmd);
2426 }
2427
2428 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2429 {
2430         struct snd_soc_dpcm *dpcm;
2431         int ret = 0;
2432
2433         for_each_dpcm_be(fe, stream, dpcm) {
2434
2435                 struct snd_soc_pcm_runtime *be = dpcm->be;
2436                 struct snd_pcm_substream *be_substream =
2437                         snd_soc_dpcm_get_substream(be, stream);
2438
2439                 /* is this op for this BE ? */
2440                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2441                         continue;
2442
2443                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2444                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2445                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2446                         continue;
2447
2448                 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2449                         be->dai_link->name);
2450
2451                 ret = soc_pcm_prepare(be_substream);
2452                 if (ret < 0) {
2453                         dev_err(be->dev, "ASoC: backend prepare failed %d\n",
2454                                 ret);
2455                         break;
2456                 }
2457
2458                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2459         }
2460         return ret;
2461 }
2462
2463 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2464 {
2465         struct snd_soc_pcm_runtime *fe = substream->private_data;
2466         int stream = substream->stream, ret = 0;
2467
2468         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2469
2470         dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2471
2472         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2473
2474         /* there is no point preparing this FE if there are no BEs */
2475         if (list_empty(&fe->dpcm[stream].be_clients)) {
2476                 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2477                                 fe->dai_link->name);
2478                 ret = -EINVAL;
2479                 goto out;
2480         }
2481
2482         ret = dpcm_be_dai_prepare(fe, substream->stream);
2483         if (ret < 0)
2484                 goto out;
2485
2486         /* call prepare on the frontend */
2487         ret = soc_pcm_prepare(substream);
2488         if (ret < 0) {
2489                 dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
2490                         fe->dai_link->name);
2491                 goto out;
2492         }
2493
2494         /* run the stream event for each BE */
2495         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
2496         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2497
2498 out:
2499         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2500         mutex_unlock(&fe->card->mutex);
2501
2502         return ret;
2503 }
2504
2505 static int soc_pcm_ioctl(struct snd_pcm_substream *substream,
2506                      unsigned int cmd, void *arg)
2507 {
2508         struct snd_soc_pcm_runtime *rtd = substream->private_data;
2509         struct snd_soc_component *component;
2510         struct snd_soc_rtdcom_list *rtdcom;
2511
2512         for_each_rtdcom(rtd, rtdcom) {
2513                 component = rtdcom->component;
2514
2515                 if (!component->driver->ops ||
2516                     !component->driver->ops->ioctl)
2517                         continue;
2518
2519                 /* FIXME: use 1st ioctl */
2520                 return component->driver->ops->ioctl(substream, cmd, arg);
2521         }
2522
2523         return snd_pcm_lib_ioctl(substream, cmd, arg);
2524 }
2525
2526 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2527 {
2528         struct snd_pcm_substream *substream =
2529                 snd_soc_dpcm_get_substream(fe, stream);
2530         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2531         int err;
2532
2533         dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2534                         stream ? "capture" : "playback", fe->dai_link->name);
2535
2536         if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2537                 /* call bespoke trigger - FE takes care of all BE triggers */
2538                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2539                                 fe->dai_link->name);
2540
2541                 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2542                 if (err < 0)
2543                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2544         } else {
2545                 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2546                         fe->dai_link->name);
2547
2548                 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2549                 if (err < 0)
2550                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2551         }
2552
2553         err = dpcm_be_dai_hw_free(fe, stream);
2554         if (err < 0)
2555                 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
2556
2557         err = dpcm_be_dai_shutdown(fe, stream);
2558         if (err < 0)
2559                 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
2560
2561         /* run the stream event for each BE */
2562         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2563
2564         return 0;
2565 }
2566
2567 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2568 {
2569         struct snd_pcm_substream *substream =
2570                 snd_soc_dpcm_get_substream(fe, stream);
2571         struct snd_soc_dpcm *dpcm;
2572         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2573         int ret;
2574
2575         dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2576                         stream ? "capture" : "playback", fe->dai_link->name);
2577
2578         /* Only start the BE if the FE is ready */
2579         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2580                 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
2581                 return -EINVAL;
2582
2583         /* startup must always be called for new BEs */
2584         ret = dpcm_be_dai_startup(fe, stream);
2585         if (ret < 0)
2586                 goto disconnect;
2587
2588         /* keep going if FE state is > open */
2589         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2590                 return 0;
2591
2592         ret = dpcm_be_dai_hw_params(fe, stream);
2593         if (ret < 0)
2594                 goto close;
2595
2596         /* keep going if FE state is > hw_params */
2597         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2598                 return 0;
2599
2600
2601         ret = dpcm_be_dai_prepare(fe, stream);
2602         if (ret < 0)
2603                 goto hw_free;
2604
2605         /* run the stream event for each BE */
2606         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2607
2608         /* keep going if FE state is > prepare */
2609         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2610                 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2611                 return 0;
2612
2613         if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2614                 /* call trigger on the frontend - FE takes care of all BE triggers */
2615                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
2616                                 fe->dai_link->name);
2617
2618                 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2619                 if (ret < 0) {
2620                         dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
2621                         goto hw_free;
2622                 }
2623         } else {
2624                 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2625                         fe->dai_link->name);
2626
2627                 ret = dpcm_be_dai_trigger(fe, stream,
2628                                         SNDRV_PCM_TRIGGER_START);
2629                 if (ret < 0) {
2630                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2631                         goto hw_free;
2632                 }
2633         }
2634
2635         return 0;
2636
2637 hw_free:
2638         dpcm_be_dai_hw_free(fe, stream);
2639 close:
2640         dpcm_be_dai_shutdown(fe, stream);
2641 disconnect:
2642         /* disconnect any non started BEs */
2643         for_each_dpcm_be(fe, stream, dpcm) {
2644                 struct snd_soc_pcm_runtime *be = dpcm->be;
2645                 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2646                                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2647         }
2648
2649         return ret;
2650 }
2651
2652 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
2653 {
2654         int ret;
2655
2656         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2657         ret = dpcm_run_update_startup(fe, stream);
2658         if (ret < 0)
2659                 dev_err(fe->dev, "ASoC: failed to startup some BEs\n");
2660         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2661
2662         return ret;
2663 }
2664
2665 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
2666 {
2667         int ret;
2668
2669         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2670         ret = dpcm_run_update_shutdown(fe, stream);
2671         if (ret < 0)
2672                 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
2673         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2674
2675         return ret;
2676 }
2677
2678 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new)
2679 {
2680         struct snd_soc_dapm_widget_list *list;
2681         int count, paths;
2682
2683         if (!fe->dai_link->dynamic)
2684                 return 0;
2685
2686         /* only check active links */
2687         if (!fe->cpu_dai->active)
2688                 return 0;
2689
2690         /* DAPM sync will call this to update DSP paths */
2691         dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n",
2692                 new ? "new" : "old", fe->dai_link->name);
2693
2694         /* skip if FE doesn't have playback capability */
2695         if (!fe->cpu_dai->driver->playback.channels_min ||
2696             !fe->codec_dai->driver->playback.channels_min)
2697                 goto capture;
2698
2699         /* skip if FE isn't currently playing */
2700         if (!fe->cpu_dai->playback_active || !fe->codec_dai->playback_active)
2701                 goto capture;
2702
2703         paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
2704         if (paths < 0) {
2705                 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2706                          fe->dai_link->name,  "playback");
2707                 return paths;
2708         }
2709
2710         /* update any playback paths */
2711         count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, new);
2712         if (count) {
2713                 if (new)
2714                         dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2715                 else
2716                         dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2717
2718                 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2719                 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2720         }
2721
2722         dpcm_path_put(&list);
2723
2724 capture:
2725         /* skip if FE doesn't have capture capability */
2726         if (!fe->cpu_dai->driver->capture.channels_min ||
2727             !fe->codec_dai->driver->capture.channels_min)
2728                 return 0;
2729
2730         /* skip if FE isn't currently capturing */
2731         if (!fe->cpu_dai->capture_active || !fe->codec_dai->capture_active)
2732                 return 0;
2733
2734         paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
2735         if (paths < 0) {
2736                 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2737                          fe->dai_link->name,  "capture");
2738                 return paths;
2739         }
2740
2741         /* update any old capture paths */
2742         count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, new);
2743         if (count) {
2744                 if (new)
2745                         dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2746                 else
2747                         dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2748
2749                 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2750                 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2751         }
2752
2753         dpcm_path_put(&list);
2754
2755         return 0;
2756 }
2757
2758 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2759  * any DAI links.
2760  */
2761 int soc_dpcm_runtime_update(struct snd_soc_card *card)
2762 {
2763         struct snd_soc_pcm_runtime *fe;
2764         int ret = 0;
2765
2766         mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2767         /* shutdown all old paths first */
2768         for_each_card_rtds(card, fe) {
2769                 ret = soc_dpcm_fe_runtime_update(fe, 0);
2770                 if (ret)
2771                         goto out;
2772         }
2773
2774         /* bring new paths up */
2775         for_each_card_rtds(card, fe) {
2776                 ret = soc_dpcm_fe_runtime_update(fe, 1);
2777                 if (ret)
2778                         goto out;
2779         }
2780
2781 out:
2782         mutex_unlock(&card->mutex);
2783         return ret;
2784 }
2785 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
2786 {
2787         struct snd_soc_dpcm *dpcm;
2788         struct snd_soc_dai *dai;
2789
2790         for_each_dpcm_be(fe, SNDRV_PCM_STREAM_PLAYBACK, dpcm) {
2791
2792                 struct snd_soc_pcm_runtime *be = dpcm->be;
2793                 int i;
2794
2795                 if (be->dai_link->ignore_suspend)
2796                         continue;
2797
2798                 for_each_rtd_codec_dai(be, i, dai) {
2799                         struct snd_soc_dai_driver *drv = dai->driver;
2800
2801                         dev_dbg(be->dev, "ASoC: BE digital mute %s\n",
2802                                          be->dai_link->name);
2803
2804                         if (drv->ops && drv->ops->digital_mute &&
2805                                                         dai->playback_active)
2806                                 drv->ops->digital_mute(dai, mute);
2807                 }
2808         }
2809
2810         return 0;
2811 }
2812
2813 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2814 {
2815         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2816         struct snd_soc_dpcm *dpcm;
2817         struct snd_soc_dapm_widget_list *list;
2818         int ret;
2819         int stream = fe_substream->stream;
2820
2821         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2822         fe->dpcm[stream].runtime = fe_substream->runtime;
2823
2824         ret = dpcm_path_get(fe, stream, &list);
2825         if (ret < 0) {
2826                 mutex_unlock(&fe->card->mutex);
2827                 return ret;
2828         } else if (ret == 0) {
2829                 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
2830                         fe->dai_link->name, stream ? "capture" : "playback");
2831         }
2832
2833         /* calculate valid and active FE <-> BE dpcms */
2834         dpcm_process_paths(fe, stream, &list, 1);
2835
2836         ret = dpcm_fe_dai_startup(fe_substream);
2837         if (ret < 0) {
2838                 /* clean up all links */
2839                 for_each_dpcm_be(fe, stream, dpcm)
2840                         dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2841
2842                 dpcm_be_disconnect(fe, stream);
2843                 fe->dpcm[stream].runtime = NULL;
2844         }
2845
2846         dpcm_clear_pending_state(fe, stream);
2847         dpcm_path_put(&list);
2848         mutex_unlock(&fe->card->mutex);
2849         return ret;
2850 }
2851
2852 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2853 {
2854         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2855         struct snd_soc_dpcm *dpcm;
2856         int stream = fe_substream->stream, ret;
2857
2858         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2859         ret = dpcm_fe_dai_shutdown(fe_substream);
2860
2861         /* mark FE's links ready to prune */
2862         for_each_dpcm_be(fe, stream, dpcm)
2863                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2864
2865         dpcm_be_disconnect(fe, stream);
2866
2867         fe->dpcm[stream].runtime = NULL;
2868         mutex_unlock(&fe->card->mutex);
2869         return ret;
2870 }
2871
2872 static void soc_pcm_private_free(struct snd_pcm *pcm)
2873 {
2874         struct snd_soc_pcm_runtime *rtd = pcm->private_data;
2875         struct snd_soc_rtdcom_list *rtdcom;
2876         struct snd_soc_component *component;
2877
2878         /* need to sync the delayed work before releasing resources */
2879         flush_delayed_work(&rtd->delayed_work);
2880         for_each_rtdcom(rtd, rtdcom) {
2881                 component = rtdcom->component;
2882
2883                 if (component->driver->pcm_free)
2884                         component->driver->pcm_free(pcm);
2885         }
2886 }
2887
2888 static int soc_rtdcom_ack(struct snd_pcm_substream *substream)
2889 {
2890         struct snd_soc_pcm_runtime *rtd = substream->private_data;
2891         struct snd_soc_rtdcom_list *rtdcom;
2892         struct snd_soc_component *component;
2893
2894         for_each_rtdcom(rtd, rtdcom) {
2895                 component = rtdcom->component;
2896
2897                 if (!component->driver->ops ||
2898                     !component->driver->ops->ack)
2899                         continue;
2900
2901                 /* FIXME. it returns 1st ask now */
2902                 return component->driver->ops->ack(substream);
2903         }
2904
2905         return -EINVAL;
2906 }
2907
2908 static int soc_rtdcom_copy_user(struct snd_pcm_substream *substream, int channel,
2909                                 unsigned long pos, void __user *buf,
2910                                 unsigned long bytes)
2911 {
2912         struct snd_soc_pcm_runtime *rtd = substream->private_data;
2913         struct snd_soc_rtdcom_list *rtdcom;
2914         struct snd_soc_component *component;
2915
2916         for_each_rtdcom(rtd, rtdcom) {
2917                 component = rtdcom->component;
2918
2919                 if (!component->driver->ops ||
2920                     !component->driver->ops->copy_user)
2921                         continue;
2922
2923                 /* FIXME. it returns 1st copy now */
2924                 return component->driver->ops->copy_user(substream, channel,
2925                                                          pos, buf, bytes);
2926         }
2927
2928         return -EINVAL;
2929 }
2930
2931 static int soc_rtdcom_copy_kernel(struct snd_pcm_substream *substream, int channel,
2932                                   unsigned long pos, void *buf, unsigned long bytes)
2933 {
2934         struct snd_soc_pcm_runtime *rtd = substream->private_data;
2935         struct snd_soc_rtdcom_list *rtdcom;
2936         struct snd_soc_component *component;
2937
2938         for_each_rtdcom(rtd, rtdcom) {
2939                 component = rtdcom->component;
2940
2941                 if (!component->driver->ops ||
2942                     !component->driver->ops->copy_kernel)
2943                         continue;
2944
2945                 /* FIXME. it returns 1st copy now */
2946                 return component->driver->ops->copy_kernel(substream, channel,
2947                                                            pos, buf, bytes);
2948         }
2949
2950         return -EINVAL;
2951 }
2952
2953 static int soc_rtdcom_fill_silence(struct snd_pcm_substream *substream, int channel,
2954                                    unsigned long pos, unsigned long bytes)
2955 {
2956         struct snd_soc_pcm_runtime *rtd = substream->private_data;
2957         struct snd_soc_rtdcom_list *rtdcom;
2958         struct snd_soc_component *component;
2959
2960         for_each_rtdcom(rtd, rtdcom) {
2961                 component = rtdcom->component;
2962
2963                 if (!component->driver->ops ||
2964                     !component->driver->ops->fill_silence)
2965                         continue;
2966
2967                 /* FIXME. it returns 1st silence now */
2968                 return component->driver->ops->fill_silence(substream, channel,
2969                                                             pos, bytes);
2970         }
2971
2972         return -EINVAL;
2973 }
2974
2975 static struct page *soc_rtdcom_page(struct snd_pcm_substream *substream,
2976                                     unsigned long offset)
2977 {
2978         struct snd_soc_pcm_runtime *rtd = substream->private_data;
2979         struct snd_soc_rtdcom_list *rtdcom;
2980         struct snd_soc_component *component;
2981         struct page *page;
2982
2983         for_each_rtdcom(rtd, rtdcom) {
2984                 component = rtdcom->component;
2985
2986                 if (!component->driver->ops ||
2987                     !component->driver->ops->page)
2988                         continue;
2989
2990                 /* FIXME. it returns 1st page now */
2991                 page = component->driver->ops->page(substream, offset);
2992                 if (page)
2993                         return page;
2994         }
2995
2996         return NULL;
2997 }
2998
2999 static int soc_rtdcom_mmap(struct snd_pcm_substream *substream,
3000                            struct vm_area_struct *vma)
3001 {
3002         struct snd_soc_pcm_runtime *rtd = substream->private_data;
3003         struct snd_soc_rtdcom_list *rtdcom;
3004         struct snd_soc_component *component;
3005
3006         for_each_rtdcom(rtd, rtdcom) {
3007                 component = rtdcom->component;
3008
3009                 if (!component->driver->ops ||
3010                     !component->driver->ops->mmap)
3011                         continue;
3012
3013                 /* FIXME. it returns 1st mmap now */
3014                 return component->driver->ops->mmap(substream, vma);
3015         }
3016
3017         return -EINVAL;
3018 }
3019
3020 /* create a new pcm */
3021 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
3022 {
3023         struct snd_soc_dai *codec_dai;
3024         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
3025         struct snd_soc_component *component;
3026         struct snd_soc_rtdcom_list *rtdcom;
3027         struct snd_pcm *pcm;
3028         char new_name[64];
3029         int ret = 0, playback = 0, capture = 0;
3030         int i;
3031
3032         if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
3033                 playback = rtd->dai_link->dpcm_playback;
3034                 capture = rtd->dai_link->dpcm_capture;
3035         } else {
3036                 for_each_rtd_codec_dai(rtd, i, codec_dai) {
3037                         if (codec_dai->driver->playback.channels_min)
3038                                 playback = 1;
3039                         if (codec_dai->driver->capture.channels_min)
3040                                 capture = 1;
3041                 }
3042
3043                 capture = capture && cpu_dai->driver->capture.channels_min;
3044                 playback = playback && cpu_dai->driver->playback.channels_min;
3045         }
3046
3047         if (rtd->dai_link->playback_only) {
3048                 playback = 1;
3049                 capture = 0;
3050         }
3051
3052         if (rtd->dai_link->capture_only) {
3053                 playback = 0;
3054                 capture = 1;
3055         }
3056
3057         /* create the PCM */
3058         if (rtd->dai_link->no_pcm) {
3059                 snprintf(new_name, sizeof(new_name), "(%s)",
3060                         rtd->dai_link->stream_name);
3061
3062                 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
3063                                 playback, capture, &pcm);
3064         } else {
3065                 if (rtd->dai_link->dynamic)
3066                         snprintf(new_name, sizeof(new_name), "%s (*)",
3067                                 rtd->dai_link->stream_name);
3068                 else
3069                         snprintf(new_name, sizeof(new_name), "%s %s-%d",
3070                                 rtd->dai_link->stream_name,
3071                                 (rtd->num_codecs > 1) ?
3072                                 "multicodec" : rtd->codec_dai->name, num);
3073
3074                 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
3075                         capture, &pcm);
3076         }
3077         if (ret < 0) {
3078                 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
3079                         rtd->dai_link->name);
3080                 return ret;
3081         }
3082         dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
3083
3084         /* DAPM dai link stream work */
3085         INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
3086
3087         pcm->nonatomic = rtd->dai_link->nonatomic;
3088         rtd->pcm = pcm;
3089         pcm->private_data = rtd;
3090
3091         if (rtd->dai_link->no_pcm) {
3092                 if (playback)
3093                         pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
3094                 if (capture)
3095                         pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
3096                 goto out;
3097         }
3098
3099         /* ASoC PCM operations */
3100         if (rtd->dai_link->dynamic) {
3101                 rtd->ops.open           = dpcm_fe_dai_open;
3102                 rtd->ops.hw_params      = dpcm_fe_dai_hw_params;
3103                 rtd->ops.prepare        = dpcm_fe_dai_prepare;
3104                 rtd->ops.trigger        = dpcm_fe_dai_trigger;
3105                 rtd->ops.hw_free        = dpcm_fe_dai_hw_free;
3106                 rtd->ops.close          = dpcm_fe_dai_close;
3107                 rtd->ops.pointer        = soc_pcm_pointer;
3108                 rtd->ops.ioctl          = soc_pcm_ioctl;
3109         } else {
3110                 rtd->ops.open           = soc_pcm_open;
3111                 rtd->ops.hw_params      = soc_pcm_hw_params;
3112                 rtd->ops.prepare        = soc_pcm_prepare;
3113                 rtd->ops.trigger        = soc_pcm_trigger;
3114                 rtd->ops.hw_free        = soc_pcm_hw_free;
3115                 rtd->ops.close          = soc_pcm_close;
3116                 rtd->ops.pointer        = soc_pcm_pointer;
3117                 rtd->ops.ioctl          = soc_pcm_ioctl;
3118         }
3119
3120         for_each_rtdcom(rtd, rtdcom) {
3121                 const struct snd_pcm_ops *ops = rtdcom->component->driver->ops;
3122
3123                 if (!ops)
3124                         continue;
3125
3126                 if (ops->ack)
3127                         rtd->ops.ack            = soc_rtdcom_ack;
3128                 if (ops->copy_user)
3129                         rtd->ops.copy_user      = soc_rtdcom_copy_user;
3130                 if (ops->copy_kernel)
3131                         rtd->ops.copy_kernel    = soc_rtdcom_copy_kernel;
3132                 if (ops->fill_silence)
3133                         rtd->ops.fill_silence   = soc_rtdcom_fill_silence;
3134                 if (ops->page)
3135                         rtd->ops.page           = soc_rtdcom_page;
3136                 if (ops->mmap)
3137                         rtd->ops.mmap           = soc_rtdcom_mmap;
3138         }
3139
3140         if (playback)
3141                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
3142
3143         if (capture)
3144                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
3145
3146         for_each_rtdcom(rtd, rtdcom) {
3147                 component = rtdcom->component;
3148
3149                 if (!component->driver->pcm_new)
3150                         continue;
3151
3152                 ret = component->driver->pcm_new(rtd);
3153                 if (ret < 0) {
3154                         dev_err(component->dev,
3155                                 "ASoC: pcm constructor failed: %d\n",
3156                                 ret);
3157                         return ret;
3158                 }
3159         }
3160
3161         pcm->private_free = soc_pcm_private_free;
3162         pcm->no_device_suspend = true;
3163 out:
3164         dev_info(rtd->card->dev, "%s <-> %s mapping ok\n",
3165                  (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name,
3166                  cpu_dai->name);
3167         return ret;
3168 }
3169
3170 /* is the current PCM operation for this FE ? */
3171 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
3172 {
3173         if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
3174                 return 1;
3175         return 0;
3176 }
3177 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
3178
3179 /* is the current PCM operation for this BE ? */
3180 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
3181                 struct snd_soc_pcm_runtime *be, int stream)
3182 {
3183         if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
3184            ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
3185                   be->dpcm[stream].runtime_update))
3186                 return 1;
3187         return 0;
3188 }
3189 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
3190
3191 /* get the substream for this BE */
3192 struct snd_pcm_substream *
3193         snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
3194 {
3195         return be->pcm->streams[stream].substream;
3196 }
3197 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
3198
3199 /* get the BE runtime state */
3200 enum snd_soc_dpcm_state
3201         snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream)
3202 {
3203         return be->dpcm[stream].state;
3204 }
3205 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state);
3206
3207 /* set the BE runtime state */
3208 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be,
3209                 int stream, enum snd_soc_dpcm_state state)
3210 {
3211         be->dpcm[stream].state = state;
3212 }
3213 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state);
3214
3215 /*
3216  * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
3217  * are not running, paused or suspended for the specified stream direction.
3218  */
3219 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
3220                 struct snd_soc_pcm_runtime *be, int stream)
3221 {
3222         struct snd_soc_dpcm *dpcm;
3223         int state;
3224
3225         for_each_dpcm_fe(be, stream, dpcm) {
3226
3227                 if (dpcm->fe == fe)
3228                         continue;
3229
3230                 state = dpcm->fe->dpcm[stream].state;
3231                 if (state == SND_SOC_DPCM_STATE_START ||
3232                         state == SND_SOC_DPCM_STATE_PAUSED ||
3233                         state == SND_SOC_DPCM_STATE_SUSPEND)
3234                         return 0;
3235         }
3236
3237         /* it's safe to free/stop this BE DAI */
3238         return 1;
3239 }
3240 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
3241
3242 /*
3243  * We can only change hw params a BE DAI if any of it's FE are not prepared,
3244  * running, paused or suspended for the specified stream direction.
3245  */
3246 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
3247                 struct snd_soc_pcm_runtime *be, int stream)
3248 {
3249         struct snd_soc_dpcm *dpcm;
3250         int state;
3251
3252         for_each_dpcm_fe(be, stream, dpcm) {
3253
3254                 if (dpcm->fe == fe)
3255                         continue;
3256
3257                 state = dpcm->fe->dpcm[stream].state;
3258                 if (state == SND_SOC_DPCM_STATE_START ||
3259                         state == SND_SOC_DPCM_STATE_PAUSED ||
3260                         state == SND_SOC_DPCM_STATE_SUSPEND ||
3261                         state == SND_SOC_DPCM_STATE_PREPARE)
3262                         return 0;
3263         }
3264
3265         /* it's safe to change hw_params */
3266         return 1;
3267 }
3268 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
3269
3270 #ifdef CONFIG_DEBUG_FS
3271 static const char *dpcm_state_string(enum snd_soc_dpcm_state state)
3272 {
3273         switch (state) {
3274         case SND_SOC_DPCM_STATE_NEW:
3275                 return "new";
3276         case SND_SOC_DPCM_STATE_OPEN:
3277                 return "open";
3278         case SND_SOC_DPCM_STATE_HW_PARAMS:
3279                 return "hw_params";
3280         case SND_SOC_DPCM_STATE_PREPARE:
3281                 return "prepare";
3282         case SND_SOC_DPCM_STATE_START:
3283                 return "start";
3284         case SND_SOC_DPCM_STATE_STOP:
3285                 return "stop";
3286         case SND_SOC_DPCM_STATE_SUSPEND:
3287                 return "suspend";
3288         case SND_SOC_DPCM_STATE_PAUSED:
3289                 return "paused";
3290         case SND_SOC_DPCM_STATE_HW_FREE:
3291                 return "hw_free";
3292         case SND_SOC_DPCM_STATE_CLOSE:
3293                 return "close";
3294         }
3295
3296         return "unknown";
3297 }
3298
3299 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
3300                                 int stream, char *buf, size_t size)
3301 {
3302         struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
3303         struct snd_soc_dpcm *dpcm;
3304         ssize_t offset = 0;
3305
3306         /* FE state */
3307         offset += snprintf(buf + offset, size - offset,
3308                         "[%s - %s]\n", fe->dai_link->name,
3309                         stream ? "Capture" : "Playback");
3310
3311         offset += snprintf(buf + offset, size - offset, "State: %s\n",
3312                         dpcm_state_string(fe->dpcm[stream].state));
3313
3314         if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3315             (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3316                 offset += snprintf(buf + offset, size - offset,
3317                                 "Hardware Params: "
3318                                 "Format = %s, Channels = %d, Rate = %d\n",
3319                                 snd_pcm_format_name(params_format(params)),
3320                                 params_channels(params),
3321                                 params_rate(params));
3322
3323         /* BEs state */
3324         offset += snprintf(buf + offset, size - offset, "Backends:\n");
3325
3326         if (list_empty(&fe->dpcm[stream].be_clients)) {
3327                 offset += snprintf(buf + offset, size - offset,
3328                                 " No active DSP links\n");
3329                 goto out;
3330         }
3331
3332         for_each_dpcm_be(fe, stream, dpcm) {
3333                 struct snd_soc_pcm_runtime *be = dpcm->be;
3334                 params = &dpcm->hw_params;
3335
3336                 offset += snprintf(buf + offset, size - offset,
3337                                 "- %s\n", be->dai_link->name);
3338
3339                 offset += snprintf(buf + offset, size - offset,
3340                                 "   State: %s\n",
3341                                 dpcm_state_string(be->dpcm[stream].state));
3342
3343                 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3344                     (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3345                         offset += snprintf(buf + offset, size - offset,
3346                                 "   Hardware Params: "
3347                                 "Format = %s, Channels = %d, Rate = %d\n",
3348                                 snd_pcm_format_name(params_format(params)),
3349                                 params_channels(params),
3350                                 params_rate(params));
3351         }
3352
3353 out:
3354         return offset;
3355 }
3356
3357 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
3358                                 size_t count, loff_t *ppos)
3359 {
3360         struct snd_soc_pcm_runtime *fe = file->private_data;
3361         ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
3362         char *buf;
3363
3364         buf = kmalloc(out_count, GFP_KERNEL);
3365         if (!buf)
3366                 return -ENOMEM;
3367
3368         if (fe->cpu_dai->driver->playback.channels_min)
3369                 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
3370                                         buf + offset, out_count - offset);
3371
3372         if (fe->cpu_dai->driver->capture.channels_min)
3373                 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE,
3374                                         buf + offset, out_count - offset);
3375
3376         ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
3377
3378         kfree(buf);
3379         return ret;
3380 }
3381
3382 static const struct file_operations dpcm_state_fops = {
3383         .open = simple_open,
3384         .read = dpcm_state_read_file,
3385         .llseek = default_llseek,
3386 };
3387
3388 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
3389 {
3390         if (!rtd->dai_link)
3391                 return;
3392
3393         if (!rtd->card->debugfs_card_root)
3394                 return;
3395
3396         rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
3397                         rtd->card->debugfs_card_root);
3398         if (!rtd->debugfs_dpcm_root) {
3399                 dev_dbg(rtd->dev,
3400                          "ASoC: Failed to create dpcm debugfs directory %s\n",
3401                          rtd->dai_link->name);
3402                 return;
3403         }
3404
3405         debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root,
3406                             rtd, &dpcm_state_fops);
3407 }
3408 #endif